-Libpng 1.4.4 - September 23, 2010
+Libpng 1.5.2 - March 31, 2011
This is a public release of libpng, intended for use in production codes.
Source files with LF line endings (for Unix/Linux) and with a
"configure" script
- libpng-1.4.4.tar.xz (LZMA-compressed, recommended)
- libpng-1.4.4.tar.gz
- libpng-1.4.4.tar.bz2
+ libpng-1.5.2.tar.xz (LZMA-compressed, recommended)
+ libpng-1.5.2.tar.gz
+ libpng-1.5.2.tar.bz2
Source files with CRLF line endings (for Windows), without the
"configure" script
- lpng144.zip
- lpng144.7z
+ lpng152.7z (LZMA-compressed, recommended)
+ lpng152.zip
Other information:
- libpng-1.4.4-README.txt
- libpng-1.4.4-LICENSE.txt
-
-Changes since the last public release (1.4.3):
- Removed extraneous new_push_process_row.c file.
- Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5
- Removed some newly-added TAB characters from pngpread.c.
- Fixed some indentation in pngpread.c and pngrutil.c
- Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans)
- Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {')
- Put "#ifndef PNG_EXTERN, #endif" around "#define PNG_EXTERN" in pngpriv.h
- Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2
- Moved the definition of png_snprintf() outside of the enclosing
- #ifdef blocks in pngconf.h
- Made a special case "#define PNGAPI" in pngconf.h for WATCOM.
- Removed reference to cbuilder5/* from Makefile.in and Makefile.am
- Updated the read macros and functions from 1.5.0beta38.
- Updated projects/visualc71 so it can find scripts/pnglibconf.h
- Removed unused png_mem_* defines from pngconf.h.
- Correct use of _WINDOWS_ in pngconf.h
- Don't try to use version-script with cygwin/mingw.
- Revised contrib/gregbook to work under cygwin/mingw.
- Updated prebuilt aclocal.m4 and ltmain.sh
- Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov)
- Updated CMakelists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for
- installing libpng in /usr/lib64 (Funda Wang).
- Revised CMakeLists.txt to put the man pages in share/man/man* not man/man*
- Revised CMakeLists.txt to make symlinks instead of copies when installing.
- Moved "#include pngusr.h" ahead of PNG_USER_PRIVATEBUILD test in pngconf.h
- Eliminated a deprecated reference to png_ptr->io_ptr in pngtest.c
- Eliminated new unnecessary #if tests regarding the sCAL chunk from pngrutil.c
- Updated the xcode project to work with libpng-1.4.x and added iOS targets
- for simulator and device (Philippe Hausler).
- Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER,
- $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE
- Rebuilt configure scripts with automake-1.11.1 instead of automake-1.11.
- Removed unused mkinstalldirs file.
-
-Send comments/corrections/commendations to glennrp at users.sourceforge.net
-or to png-mng-implement at lists.sf.net (subscription required; visit
-https://lists.sourceforge.net/lists/listinfo/png-mng-implement).
+ libpng-1.5.2-README.txt
+ libpng-1.5.2-LICENSE.txt
+
+Changes since the last public release (1.5.2):
+
+ More -Wshadow fixes for older gcc compilers. Older gcc versions apparently
+ check formal parameters names in function declarations (as well as
+ definitions) to see if they match a name in the global namespace.
+ Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the
+ old VisualC++ preprocessor.
+ Turned on interlace handling in png_read_png().
+ Fixed gcc pendantic warnings.
+ Handle longjmp in Cygwin.
+ Fixed png_get_current_row_number() in the interlaced case.
+ Cleaned up ALPHA flags and transformations.
+ Implemented expansion to 16 bits.
+ Fixed mistake in the descriptions of user read_transform and write_transform
+ function prototypes in the manual. The row_info struct is png_row_infop.
+ Corrected png_get_current_row_number documentation
+ Fixed the read/write row callback documentation.
+ This documents the current behavior, where the callback is called after
+ every row with information pertaining to the next row.
+ Fixed scripts/makefile.vcwin32
+ Updated contrib/pngsuite/README to add the word "modify".
+ Define PNG_ALLOCATED and other attributes to blank when _MSC_VER<1300.
+ ifdef out mask arrays in pngread.c when interlacing is not supported.
+ Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak
+ and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip"
+ from the makefiles.
+ Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail
+ to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)
+ Don't include standard header files in png.h while building the symbol table,
+ to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro).
+
+Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+(subscription required; visit
+https://lists.sourceforge.net/lists/listinfo/png-mng-implement
+to subscribe) or to glennrp at users.sourceforge.net
Glenn R-P
libpng_changes(){ /*
CHANGES - changes for libpng
-version 0.2
+Version 0.2
added reader into png.h
fixed small problems in stub file
-version 0.3
+Version 0.3
added pull reader
split up pngwrite.c to several files
added pnglib.txt
added K&R support
added check for 64 KB blocks for 16 bit machines
-version 0.4
+Version 0.4
cleaned up code and commented code
simplified time handling into png_time
created png_color_16 and png_color_8 to handle color needs
cleaned up zTXt reader and writer (using zlib's Reset functions)
split transformations into pngrtran.c and pngwtran.c
-version 0.5
+Version 0.5
interfaced with zlib 0.8
fixed many reading and writing bugs
saved using 3 spaces instead of tabs
-version 0.6
+Version 0.6
added png_large_malloc() and png_large_free()
added png_size_t
cleaned up some compiler warnings
added png_start_read_image()
-version 0.7
+Version 0.7
cleaned up lots of bugs
finished dithering and other stuff
added test program
changed name from pnglib to libpng
-version 0.71 [June, 1995]
+Version 0.71 [June, 1995]
changed pngtest.png for zlib 0.93
fixed error in libpng.txt and example.c
-version 0.8
+Version 0.8
cleaned up some bugs
added png_set_filler()
split up pngstub.c into pngmem.c, pngio.c, and pngerror.c
changed external functions passing floats to doubles (k&r problems?)
put all the configurable stuff in pngconf.h
enabled png_set_shift to work with paletted images on read
- added png_read_update_info() - updates info structure with
- transformations
+ added png_read_update_info() - updates info structure with transformations
-version 0.81 [August, 1995]
+Version 0.81 [August, 1995]
incorporated Tim Wegner's medium model code (thanks, Tim)
-version 0.82 [September, 1995]
+Version 0.82 [September, 1995]
[unspecified changes]
-version 0.85 [December, 1995]
+Version 0.85 [December, 1995]
added more medium model code (almost everything's a far)
added i/o, error, and memory callback functions
fixed some bugs (16 bit, 4 bit interlaced, etc.)
added first run progressive reader (barely tested)
-version 0.86 [January, 1996]
+Version 0.86 [January, 1996]
fixed bugs
improved documentation
-version 0.87 [January, 1996]
+Version 0.87 [January, 1996]
fixed medium model bugs
fixed other bugs introduced in 0.85 and 0.86
added some minor documentation
-version 0.88 [January, 1996]
+Version 0.88 [January, 1996]
fixed progressive bugs
replaced tabs with spaces
cleaned up documentation
added callbacks for read/write and warning/error functions
-version 0.89 [July, 1996]
- added new initialization API to make libpng work better with shared libs
- we now have png_create_read_struct(), png_create_write_struct(),
- png_create_info_struct(), png_destroy_read_struct(), and
- png_destroy_write_struct() instead of the separate calls to
- malloc and png_read_init(), png_info_init(), and png_write_init()
- changed warning/error callback functions to fix bug - this means you
- should use the new initialization API if you were using the old
- png_set_message_fn() calls, and that the old API no longer exists
- so that people are aware that they need to change their code
- changed filter selection API to allow selection of multiple filters
- since it didn't work in previous versions of libpng anyways
- optimized filter selection code
- fixed png_set_background() to allow using an arbitrary RGB color for
- paletted images
- fixed gamma and background correction for paletted images, so
- png_correct_palette is not needed unless you are correcting an
- external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED
- in pngconf.h) - if nobody uses this, it may disappear in the future.
- fixed bug with Borland 64K memory allocation (Alexander Lehmann)
- fixed bug in interlace handling (Smarasderagd, I think)
- added more error checking for writing and image to reduce invalid files
- separated read and write functions so that they won't both be linked
- into a binary when only reading or writing functionality is used
- new pngtest image also has interlacing and zTXt
- updated documentation to reflect new API
-
-version 0.90 [January, 1997]
- made CRC errors/warnings on critical and ancillary chunks configurable
+Version 0.89 [July, 1996]
+ Added new initialization API to make libpng work better with shared libs
+ we now have png_create_read_struct(), png_create_write_struct(),
+ png_create_info_struct(), png_destroy_read_struct(), and
+ png_destroy_write_struct() instead of the separate calls to
+ malloc and png_read_init(), png_info_init(), and png_write_init()
+ Changed warning/error callback functions to fix bug - this means you
+ should use the new initialization API if you were using the old
+ png_set_message_fn() calls, and that the old API no longer exists
+ so that people are aware that they need to change their code
+ Changed filter selection API to allow selection of multiple filters
+ since it didn't work in previous versions of libpng anyways
+ Optimized filter selection code
+ Fixed png_set_background() to allow using an arbitrary RGB color for
+ paletted images
+ Fixed gamma and background correction for paletted images, so
+ png_correct_palette is not needed unless you are correcting an
+ external palette (you will need to #define PNG_CORRECT_PALETTE_SUPPORTED
+ in pngconf.h) - if nobody uses this, it may disappear in the future.
+ Fixed bug with Borland 64K memory allocation (Alexander Lehmann)
+ Fixed bug in interlace handling (Smarasderagd, I think)
+ Added more error checking for writing and image to reduce invalid files
+ Separated read and write functions so that they won't both be linked
+ into a binary when only reading or writing functionality is used
+ New pngtest image also has interlacing and zTXt
+ Updated documentation to reflect new API
+
+Version 0.90 [January, 1997]
+ Made CRC errors/warnings on critical and ancillary chunks configurable
libpng will use the zlib CRC routines by (compile-time) default
- changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner)
- added external C++ wrapper statements to png.h (Gilles Dauphin)
- allow PNG file to be read when some or all of file signature has already
- been read from the beginning of the stream. ****This affects the size
- of info_struct and invalidates all programs that use a shared libpng****
- fixed png_filler() declarations
- fixed? background color conversions
- fixed order of error function pointers to match documentation
- current chunk name is now available in png_struct to reduce the number
- of nearly identical error messages (will simplify multi-lingual
- support when available)
- try to get ready for unknown-chunk callback functions:
- - previously read critical chunks are flagged, so the chunk handling
- routines can determine if the chunk is in the right place
- - all chunk handling routines have the same prototypes, so we will
- be able to handle all chunks via a callback mechanism
- try to fix Linux "setjmp" buffer size problems
- removed png_large_malloc, png_large_free, and png_realloc functions.
-
-version 0.95 [March, 1997]
- fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never
- fixed bug in PNG file signature compares when start != 0
- changed parameter type of png_set_filler(...filler...) from png_byte
- to png_uint_32
- added test for MACOS to ensure that both math.h and fp.h are not #included
- added macros for libpng to be compiled as a Windows DLL (Andreas Kupries)
- added "packswap" transformation, which changes the endianness of
- packed-pixel bytes (Kevin Bracey)
- added "strip_alpha" transformation, which removes the alpha channel of
- input images without using it (not necessarily a good idea)
- added "swap_alpha" transformation, which puts the alpha channel in front
- of the color bytes instead of after
- removed all implicit variable tests which assume NULL == 0 (I think)
- changed several variables to "png_size_t" to show 16/32-bit limitations
- added new pCAL chunk read/write support
- added experimental filter selection weighting (Greg Roelofs)
- removed old png_set_rgbx() and png_set_xrgb() functions that have been
+ Changed DOS small/medium model memory support - needs zlib 1.04 (Tim Wegner)
+ Added external C++ wrapper statements to png.h (Gilles Dauphin)
+ Allow PNG file to be read when some or all of file signature has already
+ been read from the beginning of the stream. ****This affects the size
+ of info_struct and invalidates all programs that use a shared libpng****
+ Fixed png_filler() declarations
+ Fixed? background color conversions
+ Fixed order of error function pointers to match documentation
+ Current chunk name is now available in png_struct to reduce the number
+ of nearly identical error messages (will simplify multi-lingual
+ support when available)
+ Try to get ready for unknown-chunk callback functions:
+ - previously read critical chunks are flagged, so the chunk handling
+ routines can determine if the chunk is in the right place
+ - all chunk handling routines have the same prototypes, so we will
+ be able to handle all chunks via a callback mechanism
+ Try to fix Linux "setjmp" buffer size problems
+ Removed png_large_malloc, png_large_free, and png_realloc functions.
+
+Version 0.95 [March, 1997]
+ Fixed bug in pngwutil.c allocating "up_row" twice and "avg_row" never
+ Fixed bug in PNG file signature compares when start != 0
+ Changed parameter type of png_set_filler(...filler...) from png_byte
+ to png_uint_32
+ Added test for MACOS to ensure that both math.h and fp.h are not #included
+ Added macros for libpng to be compiled as a Windows DLL (Andreas Kupries)
+ Added "packswap" transformation, which changes the endianness of
+ packed-pixel bytes (Kevin Bracey)
+ Added "strip_alpha" transformation, which removes the alpha channel of
+ input images without using it (not necessarily a good idea)
+ Added "swap_alpha" transformation, which puts the alpha channel in front
+ of the color bytes instead of after
+ Removed all implicit variable tests which assume NULL == 0 (I think)
+ Changed several variables to "png_size_t" to show 16/32-bit limitations
+ Added new pCAL chunk read/write support
+ Added experimental filter selection weighting (Greg Roelofs)
+ Removed old png_set_rgbx() and png_set_xrgb() functions that have been
obsolete for about 2 years now (use png_set_filler() instead)
- added macros to read 16- and 32-bit ints directly from buffer, to be
- used only on those systems that support it (namely PowerPC and 680x0)
- With some testing, this may become the default for MACOS/PPC systems.
- only calculate CRC on data if we are going to use it
- added macros for zTXt compression type PNG_zTXt_COMPRESSION_???
- added macros for simple libpng debugging output selectable at compile time
- removed PNG_READ_END_MODE in progressive reader (Smarasderagd)
- more description of info_struct in libpng.txt and png.h
- more instructions in example.c
- more chunk types tested in pngtest.c
- renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be
- png_set_<chunk>. We now have corresponding png_get_<chunk>
- functions in pngget.c to get information in info_ptr. This isolates
- the application from the internal organization of png_info_struct
- (good for shared library implementations).
-
-version 0.96 [May, 1997]
- fixed serious bug with < 8bpp images introduced in 0.95
- fixed 256-color transparency bug (Greg Roelofs)
- fixed up documentation (Greg Roelofs, Laszlo Nyul)
- fixed "error" in pngconf.h for Linux setjmp() behaviour
- fixed DOS medium model support (Tim Wegner)
- fixed png_check_keyword() for case with error in static string text
- added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul)
- added typecasts to quiet compiler errors
- added more debugging info
-
-version 0.97 [January, 1998]
- removed PNG_USE_OWN_CRC capability
- relocated png_set_crc_action from pngrutil.c to pngrtran.c
- fixed typecasts of "new_key", etc. (Andreas Dilger)
- added RFC 1152 [sic] date support
- fixed bug in gamma handling of 4-bit grayscale
- added 2-bit grayscale gamma handling (Glenn R-P)
- added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P)
- minor corrections in libpng.txt
- added simple sRGB support (Glenn R-P)
- easier conditional compiling, e.g. define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
- all configurable options can be selected from command-line instead
- of having to edit pngconf.h (Glenn R-P)
- fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P)
- added more conditions for png_do_background, to avoid changing
- black pixels to background when a background is supplied and
- no pixels are transparent
- repaired PNG_NO_STDIO behaviour
- tested NODIV support and made it default behaviour (Greg Roelofs)
- added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler)
- regularized version numbering scheme and bumped shared-library major
+ Added macros to read 16- and 32-bit ints directly from buffer, to be
+ used only on those systems that support it (namely PowerPC and 680x0)
+ With some testing, this may become the default for MACOS/PPC systems.
+ Only calculate CRC on data if we are going to use it
+ Added macros for zTXt compression type PNG_zTXt_COMPRESSION_???
+ Added macros for simple libpng debugging output selectable at compile time
+ Removed PNG_READ_END_MODE in progressive reader (Smarasderagd)
+ More description of info_struct in libpng.txt and png.h
+ More instructions in example.c
+ More chunk types tested in pngtest.c
+ Renamed pngrcb.c to pngset.c, and all png_read_<chunk> functions to be
+ png_set_<chunk>. We now have corresponding png_get_<chunk>
+ functions in pngget.c to get information in info_ptr. This isolates
+ the application from the internal organization of png_info_struct
+ (good for shared library implementations).
+
+Version 0.96 [May, 1997]
+ Fixed serious bug with < 8bpp images introduced in 0.95
+ Fixed 256-color transparency bug (Greg Roelofs)
+ Fixed up documentation (Greg Roelofs, Laszlo Nyul)
+ Fixed "error" in pngconf.h for Linux setjmp() behaviour
+ Fixed DOS medium model support (Tim Wegner)
+ Fixed png_check_keyword() for case with error in static string text
+ Added read of CRC after IEND chunk for embedded PNGs (Laszlo Nyul)
+ Added typecasts to quiet compiler errors
+ Added more debugging info
+
+Version 0.97 [January, 1998]
+ Removed PNG_USE_OWN_CRC capability
+ Relocated png_set_crc_action from pngrutil.c to pngrtran.c
+ Fixed typecasts of "new_key", etc. (Andreas Dilger)
+ Added RFC 1152 [sic] date support
+ Fixed bug in gamma handling of 4-bit grayscale
+ Added 2-bit grayscale gamma handling (Glenn R-P)
+ Added more typecasts. 65536L becomes (png_uint_32)65536L, etc. (Glenn R-P)
+ Minor corrections in libpng.txt
+ Added simple sRGB support (Glenn R-P)
+ Easier conditional compiling, e.g. define PNG_READ/WRITE_NOT_FULLY_SUPPORTED;
+ all configurable options can be selected from command-line instead
+ of having to edit pngconf.h (Glenn R-P)
+ Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P)
+ Added more conditions for png_do_background, to avoid changing
+ black pixels to background when a background is supplied and
+ no pixels are transparent
+ Repaired PNG_NO_STDIO behaviour
+ Tested NODIV support and made it default behaviour (Greg Roelofs)
+ Added "-m" option and PNGTEST_DEBUG_MEMORY to pngtest (John Bowler)
+ Regularized version numbering scheme and bumped shared-library major
version number to 2 to avoid problems with libpng 0.89 apps (Greg Roelofs)
-version 0.98 [January, 1998]
- cleaned up some typos in libpng.txt and in code documentation
- fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler)
- cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c
- changed recommendation about file_gamma for PC images to .51 from .45,
- in example.c and libpng.txt, added comments to distinguish between
- screen_gamma, viewing_gamma, and display_gamma.
- changed all references to RFC1152 to read RFC1123 and changed the
- PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED
- added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent)
- changed srgb_intent from png_byte to int to avoid compiler bugs
-
-version 0.99 [January 30, 1998]
- free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler)
- fixed a longstanding "packswap" bug in pngtrans.c
- fixed some inconsistencies in pngconf.h that prevented compiling with
- PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined
- fixed some typos and made other minor rearrangement of libpng.txt (Andreas)
- changed recommendation about file_gamma for PC images to .50 from .51 in
- example.c and libpng.txt, and changed file_gamma for sRGB images to .45
- added a number of functions to access information from the png structure
- png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit)
- added TARGET_MACOS similar to zlib-1.0.8
- define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined
- added type casting to all png_malloc() function calls
-version 0.99a [January 31, 1998]
+Version 0.98 [January, 1998]
+ Cleaned up some typos in libpng.txt and in code documentation
+ Fixed memory leaks in pCAL chunk processing (Glenn R-P and John Bowler)
+ Cosmetic change "display_gamma" to "screen_gamma" in pngrtran.c
+ Changed recommendation about file_gamma for PC images to .51 from .45,
+ in example.c and libpng.txt, added comments to distinguish between
+ screen_gamma, viewing_gamma, and display_gamma.
+ Changed all references to RFC1152 to read RFC1123 and changed the
+ PNG_TIME_RFC1152_SUPPORTED macro to PNG_TIME_RFC1123_SUPPORTED
+ Added png_invert_alpha capability (Glenn R-P -- suggestion by Jon Vincent)
+ Changed srgb_intent from png_byte to int to avoid compiler bugs
+
+Version 0.99 [January 30, 1998]
+ Free info_ptr->text instead of end_info_ptr->text in pngread.c (John Bowler)
+ Fixed a longstanding "packswap" bug in pngtrans.c
+ Fixed some inconsistencies in pngconf.h that prevented compiling with
+ PNG_READ_GAMMA_SUPPORTED and PNG_READ_hIST_SUPPORTED undefined
+ Fixed some typos and made other minor rearrangement of libpng.txt (Andreas)
+ Changed recommendation about file_gamma for PC images to .50 from .51 in
+ example.c and libpng.txt, and changed file_gamma for sRGB images to .45
+ Added a number of functions to access information from the png structure
+ png_get_image_height(), etc. (Glenn R-P, suggestion by Brad Pettit)
+ Added TARGET_MACOS similar to zlib-1.0.8
+ Define PNG_ALWAYS_EXTERN when __MWERKS__ && WIN32 are defined
+ Added type casting to all png_malloc() function calls
+
+Version 0.99a [January 31, 1998]
Added type casts and parentheses to all returns that return a value.(Tim W.)
-version 0.99b [February 4, 1998]
+
+Version 0.99b [February 4, 1998]
Added type cast png_uint_32 on malloc function calls where needed.
Changed type of num_hist from png_uint_32 to int (same as num_palette).
Added checks for rowbytes overflow, in case png_size_t is less than 32 bits.
Renamed makefile.elf to makefile.lnx.
-version 0.99c [February 7, 1998]
+
+Version 0.99c [February 7, 1998]
More type casting. Removed erroneous overflow test in pngmem.c.
Added png_buffered_memcpy() and png_buffered_memset(), apply them to rowbytes.
Added UNIX manual pages libpng.3 (incorporating libpng.txt) and png.5.
-version 0.99d [February 11, 1998]
+
+Version 0.99d [February 11, 1998]
Renamed "far_to_near()" "png_far_to_near()"
Revised libpng.3
Version 99c "buffered" operations didn't work as intended. Replaced them
Check for overlength tRNS chunk present when indexed-color PLTE is read.
Cleaned up spelling errors in libpng.3/libpng.txt
Corrected a problem with png_get_tRNS() which returned undefined trans array
-version 0.99e [February 28, 1998]
+
+Version 0.99e [February 28, 1998]
Corrected png_get_tRNS() again.
Add parentheses for easier reading of pngget.c, fixed "||" should be "&&".
Touched up example.c to make more of it compileable, although the entire
Replaced pngtest.png with one created with zlib 1.1.1
Changed pngtest to report PASS even when file size is different (Jean-loup G.)
Corrected some logic errors in png_do_invert_alpha() (Chris Patterson)
-version 0.99f [March 5, 1998]
+
+Version 0.99f [March 5, 1998]
Corrected a bug in pngpread() introduced in version 99c (Kevin Bracey)
Moved makefiles into a "scripts" directory, and added INSTALL instruction file
Added makefile.os2 and pngos2.def (A. Zabolotny) and makefile.s2x (W. Sebok)
Added pointers to "note on libpng versions" in makefile.lnx and README
Added row callback feature when reading and writing nonprogressive rows
- and added a test of this feature in pngtest.c
+ and added a test of this feature in pngtest.c
Added user transform callbacks, with test of the feature in pngtest.c
-version 0.99g [March 6, 1998, morning]
+
+Version 0.99g [March 6, 1998, morning]
Minor changes to pngtest.c to suppress compiler warnings.
Removed "beta" language from documentation.
-version 0.99h [March 6, 1998, evening]
+
+Version 0.99h [March 6, 1998, evening]
Minor changes to previous minor changes to pngtest.c
Changed PNG_READ_NOT_FULLY_SUPPORTED to PNG_READ_TRANSFORMS_NOT_SUPPORTED
- and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro
+ and added PNG_PROGRESSIVE_READ_NOT_SUPPORTED macro
Added user transform capability
-version 1.00 [March 7, 1998]
+Version 1.00 [March 7, 1998]
Changed several typedefs in pngrutil.c
Added makefile.wat (Pawel Mrochen), updated makefile.tc3 (Willem van Schaik)
- replaced "while(1)" with "for(;;)"
- added PNGARG() to prototypes in pngtest.c and removed some prototypes
- updated some of the makefiles (Tom Lane)
- changed some typedefs (s_start, etc.) in pngrutil.c
- fixed dimensions of "short_months" array in pngwrite.c
+ Replaced "while(1)" with "for(;;)"
+ Added PNGARG() to prototypes in pngtest.c and removed some prototypes
+ Updated some of the makefiles (Tom Lane)
+ Changed some typedefs (s_start, etc.) in pngrutil.c
+ Fixed dimensions of "short_months" array in pngwrite.c
Replaced ansi2knr.c with the one from jpeg-v6
-version 1.0.0 [March 8, 1998]
+Version 1.0.0 [March 8, 1998]
Changed name from 1.00 to 1.0.0 (Adam Costello)
Added smakefile.ppc (with SCOPTIONS.ppc) for Amiga PPC (Andreas Kleinert)
-version 1.0.0a [March 9, 1998]
+
+Version 1.0.0a [March 9, 1998]
Fixed three bugs in pngrtran.c to make gamma+background handling consistent
- (Greg Roelofs)
+ (Greg Roelofs)
Changed format of the PNG_LIBPNG_VER integer to xyyzz instead of xyz
- for major, minor, and bugfix releases. This is 10001. (Adam Costello,
- Tom Lane)
+ for major, minor, and bugfix releases. This is 10001. (Adam Costello,
+ Tom Lane)
Make months range from 1-12 in png_convert_to_rfc1123
-version 1.0.0b [March 13, 1998]
+
+Version 1.0.0b [March 13, 1998]
Quieted compiler complaints about two empty "for" loops in pngrutil.c
Minor changes to makefile.s2x
Removed #ifdef/#endif around a png_free() in pngread.c
-version 1.0.1 [March 14, 1998]
+Version 1.0.1 [March 14, 1998]
Changed makefile.s2x to reduce security risk of using a relative pathname
Fixed some typos in the documentation (Greg).
Fixed a problem with value of "channels" returned by png_read_update_info()
-version 1.0.1a [April 21, 1998]
+
+Version 1.0.1a [April 21, 1998]
Optimized Paeth calculations by replacing abs() function calls with intrinsics
plus other loop optimizations. Improves avg decoding speed by about 20%.
Commented out i386istic "align" compiler flags in makefile.lnx.
Moved a misplaced pngrutil code block that truncates tRNS if it has more
than num_palette entries -- test was done before num_palette was defined.
Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins).
- Changed compiler flags in makefile.wat for better optimization (Pawel Mrochen).
-version 1.0.1b [May 2, 1998]
+ Changed compiler flags in makefile.wat for better optimization
+ (Pawel Mrochen).
+
+Version 1.0.1b [May 2, 1998]
Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg).
Relocated the png_composite macros from pngrtran.c to png.h (Greg).
Added makefile.sco (contributed by Mike Hopkirk).
Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a.
Fixed a bug in pngrtran.c that would set channels=5 under some circumstances.
- More work on the Paeth-filtering, achieving imperceptible speedup (A Kleinert).
- More work on loop optimization which may help when compiled with C++ compilers.
+ More work on the Paeth-filtering, achieving imperceptible speedup
+ (A Kleinert).
+ More work on loop optimization which may help when compiled with C++
+ compilers.
Added warnings when people try to use transforms they've defined out.
Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran.
Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg)
-version 1.0.1c [May 11, 1998]
+
+Version 1.0.1c [May 11, 1998]
Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for
filler bytes should have been 0xff instead of 0xf.
Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images.
to remove unwanted capabilities via the compile line
Made some corrections to grammar (which, it's) in documentation (Greg).
Corrected example.c, use of row_pointers in png_write_image().
-version 1.0.1d [May 24, 1998]
+
+Version 1.0.1d [May 24, 1998]
Corrected several statements that used side effects illegally in pngrutil.c
and pngtrans.c, that were introduced in version 1.0.1b
Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert)
Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5
Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.)
Changed several loops from count-down to count-up, for consistency.
-version 1.0.1e [June 6, 1998]
+
+Version 1.0.1e [June 6, 1998]
Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and
added warnings when people try to set png_read_fn and png_write_fn in
the same structure.
PNGTEST_DEBUG_MEM feature.
Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner).
-version 1.0.2 [June 14, 1998]
+Version 1.0.2 [June 14, 1998]
Fixed two bugs in makefile.bor .
-version 1.0.2a [December 30, 1998]
+
+Version 1.0.2a [December 30, 1998]
Replaced and extended code that was removed from png_set_filler() in 1.0.1a.
Fixed a bug in png_do_filler() that made it fail to write filler bytes in
the left-most pixel of each row (Kevin Bracey).
Added png_get_copyright() and png_get_header_version() functions.
Revised comments on png_set_progressive_read_fn() in libpng.txt and example.c
Added information about debugging in libpng.txt and libpng.3 .
- Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and makefile.sco.
+ Changed "ln -sf" to "ln -s -f" in makefile.s2x, makefile.lnx, and
+ makefile.sco.
Removed lines after Dynamic Dependencies" in makefile.aco .
Revised makefile.dec to make a shared library (Jeremie Petit).
Removed trailing blanks from all files.
-version 1.0.2a [January 6, 1999]
+
+Version 1.0.2a [January 6, 1999]
Removed misplaced #endif and #ifdef PNG_NO_EXTERN near the end of png.h
Added "if" tests to silence complaints about unused png_ptr in png.h and png.c
Changed "check_if_png" function in example.c to return true (nonzero) if PNG.
Changed libpng.txt to demonstrate png_sig_cmp() instead of png_check_sig()
which is obsolete.
-version 1.0.3 [January 14, 1999]
+Version 1.0.3 [January 14, 1999]
Added makefile.hux, for Hewlett Packard HPUX 10.20 and 11.00 (Jim Rice)
Added a statement of Y2K compliance in png.h, libpng.3, and Y2KINFO.
-version 1.0.3a [August 12, 1999]
+
+Version 1.0.3a [August 12, 1999]
Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning
if an attempt is made to read an interlaced image when it's not supported.
Added check if png_ptr->trans is defined before freeing it in pngread.c
Correct gamma with srgb is 45455 instead of 45000 in pngrutil.c, to be
consistent with PNG-1.2, and allow variance of 500 before complaining.
Added assembler code contributed by Intel in file pngvcrd.c and modified
- makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation, Gilles Vollant)
+ makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation,
+ Gilles Vollant)
Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy.
Added some aliases for png_set_expand() in pngrtran.c, namely
png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS()
(Greg Roelofs, in "PNG: The Definitive Guide").
Added makefile.beo for BEOS on X86, contributed by Sander Stok.
-version 1.0.3b [August 26, 1999]
+
+Version 1.0.3b [August 26, 1999]
Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h
Changed leading blanks to tabs in all makefiles.
Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.
negative shift distance, whose results are undefined in the C language.
Added a check in pngset.c to prevent writing multiple tIME chunks.
Added a check in pngwrite.c to detect invalid small window_bits sizes.
-version 1.0.3d [September 4, 1999]
+
+Version 1.0.3d [September 4, 1999]
Fixed type casting of igamma in pngrutil.c
Added new png_expand functions to scripts/pngdef.pas and pngos2.def
Added a demo read_user_transform_fn that examines the row filters in pngtest.c
-version 1.0.4 [September 24, 1999]
+Version 1.0.4 [September 24, 1999]
Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined
Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h
Made several minor corrections to pngtest.c
assembler code) and makefile.vcwin32 (doesn't).
Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING)
Added a copy of pngnow.png to the distribution.
-version 1.0.4a [September 25, 1999]
+
+Version 1.0.4a [September 25, 1999]
Increase max_pixel_depth in pngrutil.c if a user transform needs it.
Changed several division operations to right-shifts in pngvcrd.c
-version 1.0.4b [September 30, 1999]
+
+Version 1.0.4b [September 30, 1999]
Added parentheses in line 3732 of pngvcrd.c
Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1
-version 1.0.4c [October 1, 1999]
+
+Version 1.0.4c [October 1, 1999]
Added a "png_check_version" function in png.c and pngtest.c that will generate
a helpful compiler error if an old png.h is found in the search path.
Changed type of png_user_transform_depth|channels from int to png_byte.
-version 1.0.4d [October 6, 1999]
+
+Version 1.0.4d [October 6, 1999]
Changed 0.45 to 0.45455 in png_set_sRGB()
Removed unused PLTE entries from pngnow.png
Re-enabled some parts of pngvcrd.c (png_combine_row) that work properly.
-version 1.0.4e [October 10, 1999]
+
+Version 1.0.4e [October 10, 1999]
Fixed sign error in pngvcrd.c (Greg Roelofs)
Replaced some instances of memcpy with simple assignments in pngvcrd (GR-P)
-version 1.0.4f [October 15, 1999]
+
+Version 1.0.4f [October 15, 1999]
Surrounded example.c code with #if 0 .. #endif to prevent people from
inadvertently trying to compile it.
Changed png_get_header_version() from a function to a macro in png.h
Removed some pointless "ptr = NULL" in pngmem.c
Added a "contrib" directory containing the source code from Greg's book.
-version 1.0.5 [October 15, 1999]
+Version 1.0.5 [October 15, 1999]
Minor editing of the INSTALL and README files.
-version 1.0.5a [October 23, 1999]
+
+Version 1.0.5a [October 23, 1999]
Added contrib/pngsuite and contrib/pngminus (Willem van Schaik)
Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans)
Further optimization and bugfix of pngvcrd.c
text_ptr structure. Instead, it makes its own copy.
Created separate write_end_info_struct in pngtest.c for a more severe test.
Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak.
-version 1.0.5b [November 23, 1999]
+
+Version 1.0.5b [November 23, 1999]
Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and
PNG_FLAG_WROTE_tIME from flags to mode.
Added png_write_info_before_PLTE() function.
Fixed some typecasting in contrib/gregbook/*.c
Updated scripts/makevms.com and added makevms.com to contrib/gregbook
and contrib/pngminus (Martin Zinser)
-version 1.0.5c [November 26, 1999]
+
+Version 1.0.5c [November 26, 1999]
Moved png_get_header_version from png.h to png.c, to accommodate ansi2knr.
Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to
accommodate making DLL's: Moved usr_png_ver from global variable to function
Removed some extraneous "-I" from contrib/pngminus/makefile.std
Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2.
Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3
-version 1.0.5d [November 29, 1999]
+
+Version 1.0.5d [November 29, 1999]
Add type cast (png_const_charp) two places in png.c
Eliminated pngtypes.h; use macros instead to declare PNG_CHNK arrays.
Renamed "PNG_GLOBAL_ARRAYS" to "PNG_USE_GLOBAL_ARRAYS" and made available
comment out (with #ifdef) all the new declarations when
PNG_USE_GLOBAL_ARRAYS is defined.
Added PNG_EXPORT_VAR macro to accommodate making DLL's.
-version 1.0.5e [November 30, 1999]
+
+Version 1.0.5e [November 30, 1999]
Added iCCP, iTXt, and sPLT support; added "lang" member to the png_text
structure; refactored the inflate/deflate support to make adding new chunks
with trailing compressed parts easier in the future, and added new functions
PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED
macros, leaving the separate macros also available.
Removed comments on #endifs at the end of many short, non-nested #if-blocks.
-version 1.0.5f [December 6, 1999]
+
+Version 1.0.5f [December 6, 1999]
Changed makefile.solaris to issue a warning about potential problems when
the ucb "ld" is in the path ahead of the ccs "ld".
Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3.
Added sCAL chunk support (Eric S. Raymond).
-version 1.0.5g [December 7, 1999]
+
+Version 1.0.5g [December 7, 1999]
Fixed "png_free_spallettes" typo in png.h
Added code to handle new chunks in pngpread.c
Moved PNG_CHNK string macro definitions outside of PNG_NO_EXTERN block
Added "translated_key" to png_text structure and png_write_iTXt().
Added code in pngwrite.c to work around a newly discovered zlib bug.
-version 1.0.5h [December 10, 1999]
+
+Version 1.0.5h [December 10, 1999]
NOTE: regarding the note for version 1.0.5e, the following must also
be included in your code:
png_text[i].translated_key = NULL;
Option to eliminate all floating point support was added. Some new
fixed-point functions such as png_set_gAMA_fixed() were added.
Expanded tabs and removed trailing blanks in source files.
-version 1.0.5i [December 13, 1999]
+
+Version 1.0.5i [December 13, 1999]
Added some type casts to silence compiler warnings.
Renamed "png_free_spalette" to "png_free_spalettes" for consistency.
Removed leading blanks from a #define in pngvcrd.c
Added png_free_hIST() function.
Various patches to fix bugs in the sCAL and integer cHRM processing,
and to add some convenience macros for use with sCAL.
-version 1.0.5j [December 21, 1999]
+
+Version 1.0.5j [December 21, 1999]
Changed "unit" parameter of png_write_sCAL from png_byte to int, to work
around buggy compilers.
Added new type "png_fixed_point" for integers that hold float*100000 values
and to write the iTXt chunk after IDAT if it appears in the end_ptr.
Added pnggccrd.c, version of pngvcrd.c Intel assembler for gcc (Greg Roelofs)
Reversed the order of trying to write floating-point and fixed-point gAMA.
-version 1.0.5k [December 27, 1999]
+
+Version 1.0.5k [December 27, 1999]
Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))"
Added png_handle_as_unknown() function (Glenn)
Added png_free_chunk_list() function and chunk_list and num_chunk_list members
Added png_free_tRNS(); png_set_tRNS() now malloc's its own trans array (ESR).
Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is.
Changed type of proflen from png_int_32 to png_uint_32 in png_get_iCCP().
-version 1.0.5l [January 1, 2000]
+
+Version 1.0.5l [January 1, 2000]
Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr()
for setting a callback function to handle unknown chunks and for
retrieving the associated user pointer (Glenn).
-version 1.0.5m [January 7, 2000]
+
+Version 1.0.5m [January 7, 2000]
Added high-level functions png_read_png(), png_write_png(), png_free_pixels().
-version 1.0.5n [January 9, 2000]
+
+Version 1.0.5n [January 9, 2000]
Added png_free_PLTE() function, and modified png_set_PLTE() to malloc its
own memory for info_ptr->palette. This makes it safe for the calling
application to free its copy of the palette any time after it calls
png_set_PLTE().
-version 1.0.5o [January 20, 2000]
+
+Version 1.0.5o [January 20, 2000]
Cosmetic changes only (removed some trailing blanks and TABs)
-version 1.0.5p [January 31, 2000]
+
+Version 1.0.5p [January 31, 2000]
Renamed pngdll.mak to makefile.bd32
Cosmetic changes in pngtest.c
-version 1.0.5q [February 5, 2000]
+
+Version 1.0.5q [February 5, 2000]
Relocated the makefile.solaris warning about PATH problems.
Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg)
Revised makefile.gcmmx
Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() macros
-version 1.0.5r [February 7, 2000]
+
+Version 1.0.5r [February 7, 2000]
Removed superfluous prototype for png_get_itxt from png.h
Fixed a bug in pngrtran.c that improperly expanded the background color.
Return *num_text=0 from png_get_text() when appropriate, and fix documentation
of png_get_text() in libpng.txt/libpng.3.
-version 1.0.5s [February 18, 2000]
+
+Version 1.0.5s [February 18, 2000]
Added "png_jmp_env()" macro to pngconf.h, to help people migrate to the
new error handler that's planned for the next libpng release, and changed
example.c, pngtest.c, and contrib programs to use this macro.
Added png_set_rows() and png_get_rows(), for use with png_read|write_png().
Modified png_read_png() to allocate info_ptr->row_pointers only if it
hasn't already been allocated.
-version 1.0.5t [March 4, 2000]
+
+Version 1.0.5t [March 4, 2000]
Changed png_jmp_env() migration aiding macro to png_jmpbuf().
Fixed "interlace" typo (should be "interlaced") in contrib/gregbook/read2-x.c
Fixed bug with use of PNG_BEFORE_IHDR bit in png_ptr->mode, introduced when
a 24-bit visual if one is available, and to allow abbreviated options.
Files in contrib/pngminus were revised to use the png_jmpbuf() macro.
Removed spaces in makefile.linux and makefile.gcmmx, introduced in 1.0.5s
-version 1.0.5u [March 5, 2000]
+
+Version 1.0.5u [March 5, 2000]
Simplified the code that detects old png.h in png.c and pngtest.c
Renamed png_spalette (_p, _pp) to png_sPLT_t (_tp, _tpp)
Increased precision of rgb_to_gray calculations from 8 to 15 bits and
added png_set_rgb_to_gray_fixed() function.
Added makefile.bc32 (32-bit Borland C++, C mode)
-version 1.0.5v [March 11, 2000]
+
+Version 1.0.5v [March 11, 2000]
Added some parentheses to the png_jmpbuf macro definition.
Updated references to the zlib home page, which has moved to freesoftware.com.
Corrected bugs in documentation regarding png_read_row() and png_write_row().
Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3,
revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin)
-version 1.0.6 [March 20, 2000]
+Version 1.0.6 [March 20, 2000]
Minor revisions of makefile.bor, libpng.txt, and gregbook/rpng2-win.c
Added makefile.sggcc (SGI IRIX with gcc)
-version 1.0.6d [April 7, 2000]
+
+Version 1.0.6d [April 7, 2000]
Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO
Added data_length parameter to png_decompress_chunk() function
Revised documentation to remove reference to abandoned png_free_chnk functions
Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file
Added a check for info_ptr->free_me&PNG_FREE_TEXT when freeing text in png.c
Simplify png_sig_bytes() function to remove use of non-ISO-C strdup().
-version 1.0.6e [April 9, 2000]
+
+Version 1.0.6e [April 9, 2000]
Added png_data_freer() function.
In the code that checks for over-length tRNS chunks, added check of
info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann)
is defined.
Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c
and mentioned the purposes of the two macros in libpng.txt/libpng.3.
-version 1.0.6f [April 14, 2000]
+
+Version 1.0.6f [April 14, 2000]
Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data.
Add checks in png_set_text() for NULL members of the input text structure.
Revised libpng.txt/libpng.3.
- Removed superfluous prototype for png_set_itxt from png.h
+ Removed superfluous prototype for png_set_iTXt from png.h
Removed "else" from pngread.c, after png_error(), and changed "0" to "length".
Changed several png_errors about malformed ancillary chunks to png_warnings.
-version 1.0.6g [April 24, 2000]
+
+Version 1.0.6g [April 24, 2000]
Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined.
Relocated paragraph about png_set_background() in libpng.3/libpng.txt
and other revisions (Matthias Benckmann)
Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and
png_ptr members to restore binary compatibility with libpng-1.0.5
(breaks compatibility with libpng-1.0.6).
-version 1.0.6h [April 24, 2000]
+
+Version 1.0.6h [April 24, 2000]
Changed shared library so-number pattern from 2.x.y.z to xy.z (this builds
libpng.so.10 & libpng.so.10.6h instead of libpng.so.2 & libpng.so.2.1.0.6h)
This is a temporary change for test purposes.
-version 1.0.6i [May 2, 2000]
+
+Version 1.0.6i [May 2, 2000]
Rearranged some members at the end of png_info and png_struct, to put
unknown_chunks_num and free_me within the original size of the png_structs
and free_me, png_read_user_fn, and png_free_fn within the original png_info,
generate a libpng error if the modes aren't set and PNG_LEGACY_SUPPORTED
was not defined.
Added makefile.intel and updated makefile.watcom (Pawel Mrochen)
-version 1.0.6j [May 3, 2000]
+
+Version 1.0.6j [May 3, 2000]
Overloaded png_read_init() and png_write_init() with macros that convert
calls to png_read_init_2() or png_write_init_2() that check the version
and structure sizes.
-version 1.0.7beta11 [May 7, 2000]
+
+Version 1.0.7beta11 [May 7, 2000]
Removed the new PNG_CREATED_READ_STRUCT and PNG_CREATED_WRITE_STRUCT modes
which are no longer used.
Eliminated the three new members of png_text when PNG_LEGACY_SUPPORTED is
Added PNGAPI macro, and added it to the definitions of all exported functions.
Relocated version macro definitions ahead of the includes of zlib.h and
pngconf.h in png.h.
-version 1.0.7beta12 [May 12, 2000]
+
+Version 1.0.7beta12 [May 12, 2000]
Revised pngset.c to avoid a problem with expanding the png_debug macro.
Deleted some extraneous defines from pngconf.h
Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.
Added png_access_version_number() function.
Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().
Expanded libpng.3/libpng.txt information about png_data_freer().
-version 1.0.7beta14 [May 17, 2000] (beta13 was not published)
+
+Version 1.0.7beta14 [May 17, 2000] (beta13 was not published)
Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as
warnings instead of errors, as pngrutil.c does.
Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()
Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.
Added png_set_invalid() function.
Fixed incorrect illustrations of png_destroy_write_struct() in example.c.
-version 1.0.7beta15 [May 30, 2000]
+
+Version 1.0.7beta15 [May 30, 2000]
Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce
fewer error messages.
Rearranged checks for Z_OK to check the most likely path first in pngpread.c
Fixed some bugs in the unused PNG_INCH_CONVERSIONS functions in pngget.c
Set each pointer to NULL after freeing it in png_free_data().
Worked around a problem in pngconf.h; AIX's strings.h defines an "index"
- macro that conflicts with libpng's png_color_16.index. (Dimitri Papadapoulos)
+ macro that conflicts with libpng's png_color_16.index. (Dimitri
+ Papadapoulos)
Added "msvc" directory with MSVC++ project files (Simon-Pierre Cadieux).
-version 1.0.7beta16 [June 4, 2000]
+
+Version 1.0.7beta16 [June 4, 2000]
Revised the workaround of AIX string.h "index" bug.
Added a check for overlength PLTE chunk in pngrutil.c.
Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer
Added PNG_USE_DLL macro.
Revised the copyright/disclaimer/license notice.
Added contrib/msvctest directory
-version 1.0.7rc1 [June 9, 2000]
+
+Version 1.0.7rc1 [June 9, 2000]
Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200)
Added contrib/visupng directory (Willem van Schaik)
-version 1.0.7beta18 [June 23, 2000]
+
+Version 1.0.7beta18 [June 23, 2000]
Revised PNGAPI definition, and pngvcrd.c to work with __GCC__
and do not redefine PNGAPI if it is passed in via a compiler directive.
Revised visupng/PngFile.c to remove returns from within the Try block.
Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros.
Updated contrib/visupng/cexcept.h to version 1.0.0.
Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks.
-version 1.0.7rc2 [June 28, 2000]
+
+Version 1.0.7rc2 [June 28, 2000]
Updated license to include disclaimers required by UCITA.
Fixed "DJBPP" typo in pnggccrd.c introduced in beta18.
-version 1.0.7 [July 1, 2000]
+Version 1.0.7 [July 1, 2000]
Revised the definition of "trans_values" in libpng.3/libpng.txt
-version 1.0.8beta1 [July 8, 2000]
+
+Version 1.0.8beta1 [July 8, 2000]
Added png_free(png_ptr, key) two places in pngpread.c to stop memory leaks.
Changed PNG_NO_STDIO to PNG_NO_CONSOLE_IO, several places in pngrutil.c and
pngwutil.c.
Removed unused "#include <assert.h>" from png.c
Added WindowsCE support.
Revised pnggccrd.c to work with gcc-2.95.2 and in the Cygwin environment.
-version 1.0.8beta2 [July 10, 2000]
+
+Version 1.0.8beta2 [July 10, 2000]
Added project files to the wince directory and made further revisions
of pngtest.c, pngrio.c, and pngwio.c in support of WindowsCE.
-version 1.0.8beta3 [July 11, 2000]
+
+Version 1.0.8beta3 [July 11, 2000]
Only set the PNG_FLAG_FREE_TRNS or PNG_FREE_TRNS flag in png_handle_tRNS()
for indexed-color input files to avoid potential double-freeing trans array
under some unusual conditions; problem was introduced in version 1.0.6f.
Further revisions to pngtest.c and files in the wince subdirectory.
-version 1.0.8beta4 [July 14, 2000]
+
+Version 1.0.8beta4 [July 14, 2000]
Added the files pngbar.png and pngbar.jpg to the distribution.
Added makefile.cygwin, and cygwin support in pngconf.h
Added PNG_NO_ZALLOC_ZERO macro (makes png_zalloc skip zeroing memory)
-version 1.0.8rc1 [July 16, 2000]
+
+Version 1.0.8rc1 [July 16, 2000]
Revised png_debug() macros and statements to eliminate compiler warnings.
-version 1.0.8 [July 24, 2000]
+Version 1.0.8 [July 24, 2000]
Added png_flush() in pngwrite.c, after png_write_IEND().
Updated makefile.hpux to build a shared library.
-version 1.0.9beta1 [November 10, 2000]
+
+Version 1.0.9beta1 [November 10, 2000]
Fixed typo in scripts/makefile.hpux
Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser)
Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser)
Revised makefile.cygwin
Fixed bugs in iCCP support in pngrutil.c and pngwutil.c.
Replaced png_set_empty_plte_permitted() with png_permit_mng_features().
-version 1.0.9beta2 [November 19, 2000]
+
+Version 1.0.9beta2 [November 19, 2000]
Renamed the "dll" subdirectory "projects".
Added borland project files to "projects" subdirectory.
Set VS_FF_PRERELEASE and VS_FF_PATCHED flags in msvc/png.rc when appropriate.
Add error message in png_set_compression_buffer_size() when malloc fails.
-version 1.0.9beta3 [November 23, 2000]
+
+Version 1.0.9beta3 [November 23, 2000]
Revised PNG_LIBPNG_BUILD_TYPE macro in png.h, used in the msvc project.
Removed the png_flush() in pngwrite.c that crashes some applications
that don't set png_output_flush_fn.
Added makefile.macosx and makefile.aix to scripts directory.
-version 1.0.9beta4 [December 1, 2000]
+
+Version 1.0.9beta4 [December 1, 2000]
Change png_chunk_warning to png_warning in png_check_keyword().
Increased the first part of msg buffer from 16 to 18 in png_chunk_error().
-version 1.0.9beta5 [December 15, 2000]
+
+Version 1.0.9beta5 [December 15, 2000]
Added support for filter method 64 (for PNG datastreams embedded in MNG).
-version 1.0.9beta6 [December 18, 2000]
+
+Version 1.0.9beta6 [December 18, 2000]
Revised png_set_filter() to accept filter method 64 when appropriate.
Added new PNG_HAVE_PNG_SIGNATURE bit to png_ptr->mode and use it to
help prevent applications from using MNG features in PNG datastreams.
Added png_permit_mng_features() function.
Revised libpng.3/libpng.txt. Changed "filter type" to "filter method".
-version 1.0.9rc1 [December 23, 2000]
+
+Version 1.0.9rc1 [December 23, 2000]
Revised test for PNG_HAVE_PNG_SIGNATURE in pngrutil.c
Fixed error handling of unknown compression type in png_decompress_chunk().
In pngconf.h, define __cdecl when _MSC_VER is defined.
-version 1.0.9beta7 [December 28, 2000]
+
+Version 1.0.9beta7 [December 28, 2000]
Changed PNG_TEXT_COMPRESSION_zTXt to PNG_COMPRESSION_TYPE_BASE several places.
Revised memory management in png_set_hIST and png_handle_hIST in a backward
compatible manner. PLTE and tRNS were revised similarly.
Revised the iCCP chunk reader to ignore trailing garbage.
-version 1.0.9beta8 [January 12, 2001]
+
+Version 1.0.9beta8 [January 12, 2001]
Moved pngasmrd.h into pngconf.h.
Improved handling of out-of-spec garbage iCCP chunks generated by PhotoShop.
-version 1.0.9beta9 [January 15, 2001]
+
+Version 1.0.9beta9 [January 15, 2001]
Added png_set_invalid, png_permit_mng_features, and png_mmx_supported to
wince and msvc project module definition files.
Minor revision of makefile.cygwin.
Fixed bug with progressive reading of narrow interlaced images in pngpread.c
-version 1.0.9beta10 [January 16, 2001]
+
+Version 1.0.9beta10 [January 16, 2001]
Do not typedef png_FILE_p in pngconf.h when PNG_NO_STDIO is defined.
Fixed "png_mmx_supported" typo in project definition files.
-version 1.0.9beta11 [January 19, 2001]
+
+Version 1.0.9beta11 [January 19, 2001]
Updated makefile.sgi to make shared library.
Removed png_mmx_support() function and disabled PNG_MNG_FEATURES_SUPPORTED
by default, for the benefit of DLL forward compatibility. These will
be re-enabled in version 1.2.0.
-version 1.0.9rc2 [January 22, 2001]
+
+Version 1.0.9rc2 [January 22, 2001]
Revised cygwin support.
-version 1.0.9 [January 31, 2001]
+Version 1.0.9 [January 31, 2001]
Added check of cygwin's ALL_STATIC in pngconf.h
Added "-nommx" parameter to contrib/gregbook/rpng2-win and rpng2-x demos.
-version 1.0.10beta1 [March 14, 2001]
+
+Version 1.0.10beta1 [March 14, 2001]
Revised makefile.dec, makefile.sgi, and makefile.sggcc; added makefile.hpgcc.
Reformatted libpng.3 to eliminate bad line breaks.
Added checks for _mmx_supported in the read_filter_row function of pnggccrd.c
Fixed bugs in png_combine_row() in pnggccrd.c and pngvcrd.c (C version)
Added warnings when retrieving or setting gamma=0.
Increased the first part of msg buffer from 16 to 18 in png_chunk_warning().
-version 1.0.10rc1 [March 23, 2001]
+
+Version 1.0.10rc1 [March 23, 2001]
Changed all instances of memcpy, strcpy, and strlen to png_memcpy, png_strcpy,
and png_strlen.
Revised png_mmx_supported() function in pnggccrd.c to return proper value.
Fixed bug in progressive reading (pngpread.c) with small images (height < 8).
-version 1.0.10 [March 30, 2001]
+Version 1.0.10 [March 30, 2001]
Deleted extraneous space (introduced in 1.0.9) from line 42 of makefile.cygwin
Added beos project files (Chris Herborth)
-version 1.0.11beta1 [April 3, 2001]
+
+Version 1.0.11beta1 [April 3, 2001]
Added type casts on several png_malloc() calls (Dimitri Papadapoulos).
Removed a no-longer needed AIX work-around from pngconf.h
Changed several "//" single-line comments to C-style in pnggccrd.c
-version 1.0.11beta2 [April 11, 2001]
+
+Version 1.0.11beta2 [April 11, 2001]
Removed PNGAPI from several functions whose prototypes did not have PNGAPI.
Updated scripts/pngos2.def
-version 1.0.11beta3 [April 14, 2001]
+
+Version 1.0.11beta3 [April 14, 2001]
Added checking the results of many instances of png_malloc() for NULL
-version 1.0.11beta4 [April 20, 2001]
+
+Version 1.0.11beta4 [April 20, 2001]
Undid the changes from version 1.0.11beta3. Added a check for NULL return
from user's malloc_fn().
Removed some useless type casts of the NULL pointer.
Added makefile.netbsd
-version 1.0.11 [April 27, 2001]
+Version 1.0.11 [April 27, 2001]
Revised makefile.netbsd
-version 1.0.12beta1 [May 14, 2001]
+
+Version 1.0.12beta1 [May 14, 2001]
Test for Windows platform in pngconf.h when including malloc.h (Emmanuel Blot)
Updated makefile.cygwin and handling of Cygwin's ALL_STATIC in pngconf.h
Added some never-to-be-executed code in pnggccrd.c to quiet compiler warnings.
libpng will reallocate the png_struct and info_struct if they are too small.
This retains future binary compatibility for old applications written for
libpng-0.88 and earlier.
-version 1.2.0beta1 [May 6, 2001]
+
+Version 1.2.0beta1 [May 6, 2001]
Bumped DLLNUM to 2.
Re-enabled PNG_MNG_FEATURES_SUPPORTED and enabled PNG_ASSEMBLER_CODE_SUPPORTED
by default.
Added runtime selection of MMX features.
Added png_set_strip_error_numbers function and related macros.
-version 1.2.0beta2 [May 7, 2001]
+
+Version 1.2.0beta2 [May 7, 2001]
Finished merging 1.2.0beta1 with version 1.0.11
Added a check for attempts to read or write PLTE in grayscale PNG datastreams.
-version 1.2.0beta3 [May 17, 2001]
+
+Version 1.2.0beta3 [May 17, 2001]
Enabled user memory function by default.
Modified png_create_struct so it passes user mem_ptr to user memory allocator.
Increased png_mng_features flag from png_byte to png_uint_32.
Bumped shared-library (so-number) and dll-number to 3.
-version 1.2.0beta4 [June 23, 2001]
+
+Version 1.2.0beta4 [June 23, 2001]
Check for missing profile length field in iCCP chunk and free chunk_data
in case of truncated iCCP chunk.
Bumped shared-library number to 3 in makefile.sgi and makefile.sggcc
of png_write_oFFS width and height from png_uint_32 to png_int_32.
Updated example.c
Revised prototypes for png_debug_malloc and png_debug_free in pngtest.c
-version 1.2.0beta5 [August 8, 2001]
+
+Version 1.2.0beta5 [August 8, 2001]
Revised contrib/gregbook
Revised makefile.gcmmx
Revised pnggccrd.c to conditionally compile some thread-unsafe code only
Replaced calls to fprintf(stderr,...) with png_warning() in pnggccrd.c
Removed restriction that do_invert_mono only operate on 1-bit opaque files
-version 1.2.0 [September 1, 2001]
+Version 1.2.0 [September 1, 2001]
Changed a png_warning() to png_debug() in pnggccrd.c
Fixed contrib/gregbook/rpng-x.c, rpng2-x.c to avoid crash with XFreeGC().
-version 1.2.1beta1 [October 19, 2001]
+
+Version 1.2.1beta1 [October 19, 2001]
Revised makefile.std in contrib/pngminus
Include background_1 in png_struct regardless of gamma support.
Revised makefile.netbsd and makefile.macosx, added makefile.darwin.
Revised example.c to provide more details about using row_callback().
-version 1.2.1beta2 [October 25, 2001]
+
+Version 1.2.1beta2 [October 25, 2001]
Added type cast to each NULL appearing in a function call, except for
WINCE functions.
Added makefile.so9.
-version 1.2.1beta3 [October 27, 2001]
+
+Version 1.2.1beta3 [October 27, 2001]
Removed type casts from all NULLs.
Simplified png_create_struct_2().
-version 1.2.1beta4 [November 7, 2001]
+
+Version 1.2.1beta4 [November 7, 2001]
Revised png_create_info_struct() and png_creat_struct_2().
Added error message if png_write_info() was omitted.
Type cast NULLs appearing in function calls when _NO_PROTO or
PNG_TYPECAST_NULL is defined.
-version 1.2.1rc1 [November 24, 2001]
+
+Version 1.2.1rc1 [November 24, 2001]
Type cast NULLs appearing in function calls except when PNG_NO_TYPECAST_NULL
is defined.
Changed typecast of "size" argument to png_size_t in pngmem.c calls to
Updated makefile.sgi to recognize LIBPATH and INCPATH.
Updated various makefiles so "make clean" does not remove previous major
version of the shared library.
-version 1.2.1rc2 [December 4, 2001]
+
+Version 1.2.1rc2 [December 4, 2001]
Always allocate 256-entry internal palette, hist, and trans arrays, to
avoid out-of-bounds memory reference caused by invalid PNG datastreams.
Added a check for prefix_length > data_length in iCCP chunk handler.
-version 1.2.1 [December 7, 2001]
+Version 1.2.1 [December 7, 2001]
None.
-version 1.2.2beta1 [February 22, 2002]
+
+Version 1.2.2beta1 [February 22, 2002]
Fixed a bug with reading the length of iCCP profiles (Larry Reeves).
Revised makefile.linux, makefile.gcmmx, and makefile.sgi to generate
libpng.a, libpng12.so (not libpng.so.3), and libpng12/png.h
Revised calls to png_create_read_struct() and png_create_write_struct()
for simpler debugging.
Revised png_zalloc() so zlib handles errors (uses PNG_FLAG_MALLOC_NULL_MEM_OK)
-version 1.2.2beta2 [February 23, 2002]
+
+Version 1.2.2beta2 [February 23, 2002]
Check chunk_length and idat_size for invalid (over PNG_MAX_UINT) lengths.
Check for invalid image dimensions in png_get_IHDR.
Added missing "fi;" in the install target of the SGI makefiles.
Added install-static to all makefiles that make shared libraries.
Always do gamma compensation when image is partially transparent.
-version 1.2.2beta3 [March 7, 2002]
+
+Version 1.2.2beta3 [March 7, 2002]
Compute background.gray and background_1.gray even when color_type is RGB
in case image gets reduced to gray later.
Modified shared-library makefiles to install pkgconfig/libpngNN.pc.
Added install-shared target to all makefiles that make shared libraries.
Stopped a double free of palette, hist, and trans when not using free_me.
Added makefile.32sunu for Sun Ultra 32 and makefile.64sunu for Sun Ultra 64.
-version 1.2.2beta4 [March 8, 2002]
+
+Version 1.2.2beta4 [March 8, 2002]
Compute background.gray and background_1.gray even when color_type is RGB
in case image gets reduced to gray later (Jason Summers).
Relocated a misplaced /bin/rm in the "install-shared" makefile targets
Added PNG_1_0_X macro which can be used to build a 1.0.x-compatible library.
-version 1.2.2beta5 [March 26, 2002]
+
+Version 1.2.2beta5 [March 26, 2002]
Added missing PNGAPI to several function definitions.
Check for invalid bit_depth or color_type in png_get_IHDR(), and
check for missing PLTE or IHDR in png_push_read_chunk() (Matthias Clasen).
Changed "()" to "{}" in scripts/libpng.pc.in.
Revised makefiles to put png.h and pngconf.h only in $prefix/include/libpngNN
Revised makefiles to make symlink to libpng.so.NN in addition to libpngNN.so
-version 1.2.2beta6 [March 31, 2002]
-version 1.0.13beta1 [March 31, 2002]
+
+Version 1.2.2beta6 [March 31, 2002]
+
+Version 1.0.13beta1 [March 31, 2002]
Prevent png_zalloc() from trying to memset memory that it failed to acquire.
Add typecasts of PNG_MAX_UINT in pngset_cHRM_fixed() (Matt Holgate).
Ensure that the right function (user or default) is used to free the
png_struct after an error in png_create_read_struct_2().
-version 1.2.2rc1 [April 7, 2002]
-version 1.0.13rc1 [April 7, 2002]
+
+Version 1.2.2rc1 [April 7, 2002]
+
+Version 1.0.13rc1 [April 7, 2002]
Save the ebx register in pnggccrd.c (Sami Farin)
Add "mem_ptr = png_ptr->mem_ptr" in png_destroy_write_struct() (Paul Gardner).
Updated makefiles to put headers in include/libpng and remove old include/*.h.
-version 1.2.2 [April 15, 2002]
-version 1.0.13 [April 15, 2002]
+Version 1.2.2 [April 15, 2002]
+
+Version 1.0.13 [April 15, 2002]
Revised description of png_set_filter() in libpng.3/libpng.txt.
Revised makefile.netbsd and added makefile.neNNbsd and makefile.freebsd
-version 1.0.13patch01 [April 17, 2002]
-version 1.2.2patch01 [April 17, 2002]
- Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and makefile.sggcc
- Fixed VER -> PNGVER typo in makefile.macosx and added install-static to install
+
+Version 1.0.13patch01 [April 17, 2002]
+
+Version 1.2.2patch01 [April 17, 2002]
+ Changed ${PNGMAJ}.${PNGVER} bug to ${PNGVER} in makefile.sgi and
+ makefile.sggcc
+ Fixed VER -> PNGVER typo in makefile.macosx and added install-static to
+ install
Added install: target to makefile.32sunu and makefile.64sunu
-version 1.0.13patch03 [April 18, 2002]
-version 1.2.2patch03 [April 18, 2002]
+
+Version 1.0.13patch03 [April 18, 2002]
+
+Version 1.2.2patch03 [April 18, 2002]
Revised 15 makefiles to link libpng.a to libpngNN.a and the include libpng
subdirectory to libpngNN subdirectory without the full pathname.
Moved generation of libpng.pc from "install" to "all" in 15 makefiles.
-version 1.2.3rc1 [April 28, 2002]
+
+Version 1.2.3rc1 [April 28, 2002]
Added install-man target to 15 makefiles (Dimitri Papadopolous-Orfanos).
Added $(DESTDIR) feature to 24 makefiles (Tim Mooney)
Fixed bug with $prefix, should be $(prefix) in makefile.hpux.
to put one in their application.
Restored png_zalloc() and png_zfree() prototypes to version 1.2.1 and
removed them from module definition files.
-version 1.2.3rc2 [May 1, 2002]
+
+Version 1.2.3rc2 [May 1, 2002]
Fixed bug in reporting number of channels in pngget.c and pngset.c,
that was introduced in version 1.2.2beta5.
Exported png_zalloc(), png_zfree(), png_default_read(), png_default_write(),
png_default_flush(), and png_push_fill_buffer() and included them in
module definition files.
Added "libpng.pc" dependency to the "install-shared" target in 15 makefiles.
-version 1.2.3rc3 [May 1, 2002]
+
+Version 1.2.3rc3 [May 1, 2002]
Revised prototype for png_default_flush()
Remove old libpng.pc and libpngNN.pc before installing new ones.
-version 1.2.3rc4 [May 2, 2002]
+
+Version 1.2.3rc4 [May 2, 2002]
Typos in *.def files (png_default_read|write -> png_default_read|write_data)
In makefiles, changed rm libpng.NN.pc to rm libpngNN.pc
- Added libpng-config and libpngNN-config and modified makefiles to install them.
+ Added libpng-config and libpngNN-config and modified makefiles to install
+ them.
Changed $(MANPATH) to $(DESTDIR)$(MANPATH) in makefiles
Added "Win32 DLL VB" configuration to projects/msvc/libpng.dsp
-version 1.2.3rc5 [May 11, 2002]
+
+Version 1.2.3rc5 [May 11, 2002]
Changed "error" and "message" in prototypes to "error_message" and
"warning_message" to avoid namespace conflict.
Revised 15 makefiles to build libpng-config from libpng-config-*.in
Once more restored png_zalloc and png_zfree to regular nonexported form.
Restored png_default_read|write_data, png_default_flush, png_read_fill_buffer
- to nonexported form, but with PNGAPI, and removed them from module def files.
-version 1.2.3rc6 [May 14, 2002]
+ to nonexported form, but with PNGAPI, and removed them from module def
+ files.
+
+Version 1.2.3rc6 [May 14, 2002]
Removed "PNGAPI" from png_zalloc() and png_zfree() in png.c
Changed "Gz" to "Gd" in projects/msvc/libpng.dsp and zlib.dsp.
Removed leftover libpng-config "sed" script from four makefiles.
Revised libpng-config creating script in 16 makefiles.
-version 1.2.3 [May 22, 2002]
+Version 1.2.3 [May 22, 2002]
Revised libpng-config target in makefile.cygwin.
Removed description of png_set_mem_fn() from documentation.
Revised makefile.freebsd.
Minor cosmetic changes to 15 makefiles, e.g., $(DI) = $(DESTDIR)/$(INCDIR).
Revised projects/msvc/README.txt
Changed -lpng to -lpngNN in LDFLAGS in several makefiles.
-version 1.2.4beta1 [May 24, 2002]
+
+Version 1.2.4beta1 [May 24, 2002]
Added libpng.pc and libpng-config to "all:" target in 16 makefiles.
Fixed bug in 16 makefiles: $(DESTDIR)/$(LIBPATH) to $(DESTDIR)$(LIBPATH)
Added missing "\" before closing double quote in makefile.gcmmx.
Plugged various memory leaks; added png_malloc_warn() and png_set_text_2()
functions.
-version 1.2.4beta2 [June 25, 2002]
+
+Version 1.2.4beta2 [June 25, 2002]
Plugged memory leak of png_ptr->current_text (Matt Holgate).
Check for buffer overflow before reading CRC in pngpread.c (Warwick Allison)
Added -soname to the loader flags in makefile.dec, makefile.sgi, and
makefile.sggcc.
Added "test-installed" target to makefile.linux, makefile.gcmmx,
makefile.sgi, and makefile.sggcc.
-version 1.2.4beta3 [June 28, 2002]
+
+Version 1.2.4beta3 [June 28, 2002]
Plugged memory leak of row_buf in pngtest.c when there is a png_error().
Detect buffer overflow in pngpread.c when IDAT is corrupted with extra data.
Added "test-installed" target to makefile.32sunu, makefile.64sunu,
makefile.beos, makefile.darwin, makefile.dec, makefile.macosx,
makefile.solaris, makefile.hpux, makefile.hpgcc, and makefile.so9.
-version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002]
+
+Version 1.2.4rc1 and 1.0.14rc1 [July 2, 2002]
Added "test-installed" target to makefile.cygwin and makefile.sco.
Revised pnggccrd.c to be able to back out version 1.0.x via PNG_1_0_X macro.
-version 1.2.4 and 1.0.14 [July 8, 2002]
+Version 1.2.4 and 1.0.14 [July 8, 2002]
Changed png_warning() to png_error() when width is too large to process.
-version 1.2.4patch01 [July 20, 2002]
+
+Version 1.2.4patch01 [July 20, 2002]
Revised makefile.cygwin to use DLL number 12 instead of 13.
-version 1.2.5beta1 [August 6, 2002]
+
+Version 1.2.5beta1 [August 6, 2002]
Added code to contrib/gregbook/readpng2.c to ignore unused chunks.
Replaced toucan.png in contrib/gregbook (it has been corrupt since 1.0.11)
Removed some stray *.o files from contrib/gregbook.
Prevent png_ptr->pass from exceeding 7 in png_push_finish_row().
Updated makefile.hpgcc
Updated png.c and pnggccrd.c handling of return from png_mmx_support()
-version 1.2.5beta2 [August 15, 2002]
+
+Version 1.2.5beta2 [August 15, 2002]
Only issue png_warning() about "Too much data" in pngpread.c when avail_in
is nonzero.
Updated makefiles to install a separate libpng.so.3 with its own rpath.
-version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002]
+
+Version 1.2.5rc1 and 1.0.15rc1 [August 24, 2002]
Revised makefiles to not remove previous minor versions of shared libraries.
-version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002]
+
+Version 1.2.5rc2 and 1.0.15rc2 [September 16, 2002]
Revised 13 makefiles to remove "-lz" and "-L$(ZLIBLIB)", etc., from shared
library loader directive.
Added missing "$OBJSDLL" line to makefile.gcmmx.
Added missing "; fi" to makefile.32sunu.
-version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002]
+
+Version 1.2.5rc3 and 1.0.15rc3 [September 18, 2002]
Revised libpng-config script.
-version 1.2.5 and 1.0.15 [October 3, 2002]
+Version 1.2.5 and 1.0.15 [October 3, 2002]
Revised makefile.macosx, makefile.darwin, makefile.hpgcc, and makefile.hpux,
and makefile.aix.
Relocated two misplaced PNGAPI lines in pngtest.c
-version 1.2.6beta1 [October 22, 2002]
+
+Version 1.2.6beta1 [October 22, 2002]
Commented out warning about uninitialized mmx_support in pnggccrd.c.
Changed "IBMCPP__" flag to "__IBMCPP__" in pngconf.h.
Relocated two more misplaced PNGAPI lines in pngtest.c
Fixed memory overrun bug in png_do_read_filler() with 16-bit datastreams,
introduced in version 1.0.2.
Revised makefile.macosx, makefile.dec, makefile.aix, and makefile.32sunu.
-version 1.2.6beta2 [November 1, 2002]
+
+Version 1.2.6beta2 [November 1, 2002]
Added libpng-config "--ldopts" output.
Added "AR=ar" and "ARFLAGS=rc" and changed "ar rc" to "$(AR) $(ARFLAGS)"
in makefiles.
-version 1.2.6beta3 [July 18, 2004]
+
+Version 1.2.6beta3 [July 18, 2004]
Reverted makefile changes from version 1.2.6beta2 and some of the changes
from version 1.2.6beta1; these will be postponed until version 1.2.7.
Version 1.2.6 is going to be a simple bugfix release.
Updated contrib/visupng/VisualPng.dsp (Cosmin).
Updated contrib/visupng/cexcept.h to version 2.0.0 (Cosmin).
Added a separate distribution with "configure" and supporting files (Junichi).
-version 1.2.6beta4 [July 28, 2004]
+
+Version 1.2.6beta4 [July 28, 2004]
Added user ability to change png_size_t via a PNG_SIZE_T macro.
Added png_sizeof() and png_convert_size() functions.
Added PNG_SIZE_MAX (maximum value of a png_size_t variable.
Added some "#if PNG_WRITE_SUPPORTED" blocks.
Added #ifdef to remove some redundancy in png_malloc_default().
Use png_malloc instead of png_zalloc to allocate the pallete.
-version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004]
+
+Version 1.0.16rc1 and 1.2.6rc1 [August 4, 2004]
Fixed buffer overflow vulnerability in png_handle_tRNS()
Fixed integer arithmetic overflow vulnerability in png_read_png().
Fixed some harmless bugs in png_handle_sBIT, etc, that would cause
Fixed wrong cast of returns from png_get_user_width|height_max().
Changed some "keep the compiler happy" from empty statements to returns,
Revised libpng.txt to remove 1.2.x stuff from the 1.0.x distribution
-version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004]
+
+Version 1.0.16rc2 and 1.2.6rc2 [August 7, 2004]
Revised makefile.darwin and makefile.solaris. Removed makefile.macosx.
Revised pngtest's png_debug_malloc() to use png_malloc() instead of
png_malloc_default() which is not supposed to be exported.
Changed "HANDLE_CHUNK_*" to "PNG_HANDLE_CHUNK_*" (Cosmin)
Added "-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)" to 15 *NIX makefiles.
Added code to update the row_info->colortype in png_do_read_filler() (MSB).
-version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004]
+
+Version 1.0.16rc3 and 1.2.6rc3 [August 9, 2004]
Eliminated use of "abs()" in testing cHRM and gAMA values, to avoid
trouble with some 64-bit compilers. Created PNG_OUT_OF_RANGE() macro.
Revised documentation of png_set_keep_unknown_chunks().
Check handle_as_unknown status in pngpread.c, as in pngread.c previously.
Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_INTERNAL section of png.h
Added "rim" definitions for CONST4 and CONST6 in pnggccrd.c
-version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004]
+
+Version 1.0.16rc4 and 1.2.6rc4 [August 10, 2004]
Fixed mistake in pngtest.c introduced in 1.2.6rc2 (declaration of
"pinfo" was out of place).
-version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004]
+
+Version 1.0.16rc5 and 1.2.6rc5 [August 10, 2004]
Moved "PNG_HANDLE_CHUNK_*" macros out of PNG_ASSEMBLER_CODE_SUPPORTED
section of png.h where they were inadvertently placed in version rc3.
-version 1.2.6 and 1.0.16 [August 15, 2004]
+Version 1.2.6 and 1.0.16 [August 15, 2004]
Revised pngtest so memory allocation testing is only done when PNG_DEBUG==1.
-version 1.2.7beta1 [August 26, 2004]
+
+Version 1.2.7beta1 [August 26, 2004]
Removed unused pngasmrd.h file.
Removed references to uu.net for archived files. Added references to
PNG Spec (second edition) and the PNG ISO/IEC Standard.
Added "test-dd" target in 15 makefiles, to run pngtest in DESTDIR.
Fixed bug with "optimized window size" in the IDAT datastream, that
causes libpng to write PNG files with incorrect zlib header bytes.
-version 1.2.7beta2 [August 28, 2004]
+
+Version 1.2.7beta2 [August 28, 2004]
Fixed bug with sCAL chunk and big-endian machines (David Munro).
Undid new code added in 1.2.6rc2 to update the color_type in
png_set_filler().
Added png_set_add_alpha() that updates color type.
-version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004]
+
+Version 1.0.17rc1 and 1.2.7rc1 [September 4, 2004]
Revised png_set_strip_filler() to not remove alpha if color_type has alpha.
-version 1.2.7 and 1.0.17 [September 12, 2004]
+Version 1.2.7 and 1.0.17 [September 12, 2004]
Added makefile.hp64
Changed projects/msvc/png32ms.def to scripts/png32ms.def in makefile.cygwin
-version 1.2.8beta1 [November 1, 2004]
+
+Version 1.2.8beta1 [November 1, 2004]
Fixed bug in png_text_compress() that would fail to complete a large block.
Fixed bug, introduced in libpng-1.2.7, that overruns a buffer during
strip alpha operation in png_do_strip_filler().
Added PNG_1_2_X definition in pngconf.h
Use #ifdef to comment out png_info_init in png.c and png_read_init in
pngread.c (as of 1.3.0)
-version 1.2.8beta2 [November 2, 2004]
+
+Version 1.2.8beta2 [November 2, 2004]
Reduce color_type to a nonalpha type after strip alpha operation in
png_do_strip_filler().
-version 1.2.8beta3 [November 3, 2004]
+
+Version 1.2.8beta3 [November 3, 2004]
Revised definitions of PNG_MAX_UINT_32, PNG_MAX_SIZE, and PNG_MAXSUM
-version 1.2.8beta4 [November 12, 2004]
+
+Version 1.2.8beta4 [November 12, 2004]
Fixed (again) definition of PNG_LIBPNG_VER_DLLNUM in png.h (Cosmin).
Added PNG_LIBPNG_BUILD_PRIVATE in png.h (Cosmin).
Set png_ptr->zstream.data_type to Z_BINARY, to avoid unnecessary detection
of data type in deflate (Cosmin).
Deprecated but continue to support SPECIALBUILD and PRIVATEBUILD in favor of
PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
-version 1.2.8beta5 [November 20, 2004]
+
+Version 1.2.8beta5 [November 20, 2004]
Use png_ptr->flags instead of png_ptr->transformations to pass
PNG_STRIP_ALPHA info to png_do_strip_filler(), to preserve ABI
compatibility.
Revised handling of SPECIALBUILD, PRIVATEBUILD,
PNG_LIBPNG_BUILD_SPECIAL_STRING and PNG_LIBPNG_BUILD_PRIVATE_STRING.
-version 1.2.8rc1 [November 24, 2004]
+
+Version 1.2.8rc1 [November 24, 2004]
Moved handling of BUILD macros from pngconf.h to png.h
Added definition of PNG_LIBPNG_BASE_TYPE in png.h, inadvertently
omitted from beta5.
Revised scripts/pngw32.rc
Despammed mailing addresses by masking "@" with "at".
Inadvertently installed a supposedly faster test version of pngrutil.c
-version 1.2.8rc2 [November 26, 2004]
+
+Version 1.2.8rc2 [November 26, 2004]
Added two missing "\" in png.h
Change tests in pngread.c and pngpread.c to
if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
png_do_read_transformations(png_ptr);
-version 1.2.8rc3 [November 28, 2004]
+
+Version 1.2.8rc3 [November 28, 2004]
Reverted pngrutil.c to version libpng-1.2.8beta5.
Added scripts/makefile.elf with supporting code in pngconf.h for symbol
versioning (John Bowler).
-version 1.2.8rc4 [November 29, 2004]
+
+Version 1.2.8rc4 [November 29, 2004]
Added projects/visualc7 (Simon-pierre).
-version 1.2.8rc5 [November 29, 2004]
+
+Version 1.2.8rc5 [November 29, 2004]
Fixed new typo in scripts/pngw32.rc
-version 1.2.8 [December 3, 2004]
+Version 1.2.8 [December 3, 2004]
Removed projects/visualc7, added projects/visualc71.
-version 1.2.9beta1 [February 21, 2006]
-
+Version 1.2.9beta1 [February 21, 2006]
Initialized some structure members in pngwutil.c to avoid gcc-4.0.0 complaints
Revised man page and libpng.txt to make it clear that one should not call
png_read_end or png_write_end after png_read_png or png_write_png.
Fixed scripts/makefile.cygwin (Christian Biesinger, Cosmin).
Default iTXt support was inadvertently enabled.
-version 1.2.9beta2 [February 21, 2006]
-
+Version 1.2.9beta2 [February 21, 2006]
Check for png_rgb_to_gray and png_gray_to_rgb read transformations before
checking for png_read_dither in pngrtran.c
Revised checking of chromaticity limits to accommodate extended RGB
Eliminated distributions without the "configure" script.
Updated INSTALL instructions.
-version 1.2.9beta3 [February 24, 2006]
-
+Version 1.2.9beta3 [February 24, 2006]
Fixed CRCRLF line endings in contrib/visupng/VisualPng.dsp
Made libpng.pc respect EXEC_PREFIX (D. P. Kreil, J. Bowler)
Removed reference to pngasmrd.h from Makefile.am
Renamed ANNOUNCE to NEWS.
Created AUTHORS file.
-version 1.2.9beta4 [March 3, 2006]
-
+Version 1.2.9beta4 [March 3, 2006]
Changed definition of PKGCONFIG from $prefix/lib to $libdir in configure.ac
Reverted to filenames LICENSE and ANNOUNCE; removed AUTHORS and COPYING.
Removed newline from the end of some error and warning messages.
Added "OS2" to list of systems that don't need underscores, in pnggccrd.c
Removed libpng version and date from *.c files.
-version 1.2.9beta5 [March 4, 2006]
+Version 1.2.9beta5 [March 4, 2006]
Removed trailing blanks from source files.
Put version and date of latest change in each source file, and changed
copyright year accordingly.
- More cleanup of configure.ac, Makefile.ac, and associated scripts.
+ More cleanup of configure.ac, Makefile.am, and associated scripts.
Restored scripts/makefile.elf which was inadvertently deleted.
-version 1.2.9beta6 [March 6, 2006]
+Version 1.2.9beta6 [March 6, 2006]
Fixed typo (RELEASE) in configuration files.
-version 1.2.9beta7 [March 7, 2006]
+Version 1.2.9beta7 [March 7, 2006]
Removed libpng.vers and libpng.sym from libpng12_la_SOURCES in Makefile.am
Fixed inconsistent #ifdef's around png_sig_bytes() and png_set_sCAL_s()
in png.h.
Made cosmetic changes to some makefiles, adding LN_SF and other macros.
Made some makefiles accept "exec_prefix".
-version 1.2.9beta8 [March 9, 2006]
+Version 1.2.9beta8 [March 9, 2006]
Fixed some "#if defined (..." which should be "#if defined(..."
Bug introduced in libpng-1.2.8.
Fixed inconsistency in definition of png_default_read_data()
Added png_set_expand_gray_1_2_4_to_8() and deprecated
png_set_gray_1_2_4_to_8() which also expands tRNS to alpha.
-version 1.2.9beta9 [March 10, 2006]
+Version 1.2.9beta9 [March 10, 2006]
Include "config.h" in pngconf.h when available.
Added some checks for NULL png_ptr or NULL info_ptr (timeless)
-version 1.2.9beta10 [March 20, 2006]
+Version 1.2.9beta10 [March 20, 2006]
Removed extra CR from contrib/visualpng/VisualPng.dsw (Cosmin)
Made pnggccrd.c PIC-compliant (Christian Aichinger).
Added makefile.mingw (Wolfgang Glas).
Revised pngconf.h MMX checking.
-version 1.2.9beta11 [March 22, 2006]
+Version 1.2.9beta11 [March 22, 2006]
Fixed out-of-order declaration in pngwrite.c that was introduced in beta9
Simplified some makefiles by using LIBSO, LIBSOMAJ, and LIBSOVER macros.
-version 1.2.9rc1 [March 31, 2006]
+Version 1.2.9rc1 [March 31, 2006]
Defined PNG_USER_PRIVATEBUILD when including "pngusr.h" (Cosmin).
Removed nonsensical assertion check from pngtest.c (Cosmin).
-version 1.2.9 [April 14, 2006]
+Version 1.2.9 [April 14, 2006]
Revised makefile.beos and added "none" selector in ltmain.sh
-version 1.2.10beta1 [April 15, 2006]
+Version 1.2.10beta1 [April 15, 2006]
Renamed "config.h" to "png_conf.h" and revised Makefile.am to add
-DPNG_BUILDING_LIBPNG to compile directive, and modified pngconf.h
to include png_conf.h only when PNG_BUILDING_LIBPNG is defined.
-version 1.2.10beta2 [April 15, 2006]
+Version 1.2.10beta2 [April 15, 2006]
Manually updated Makefile.in and configure. Changed png_conf.h.in
back to config.h.
-version 1.2.10beta3 [April 15, 2006]
+Version 1.2.10beta3 [April 15, 2006]
Change png_conf.h back to config.h in pngconf.h.
-version 1.2.10beta4 [April 16, 2006]
+Version 1.2.10beta4 [April 16, 2006]
Change PNG_BUILDING_LIBPNG to PNG_CONFIGURE_LIBPNG in config/Makefile*.
-version 1.2.10beta5 [April 16, 2006]
+Version 1.2.10beta5 [April 16, 2006]
Added a configure check for compiling assembler code in pnggccrd.c
-version 1.2.10beta6 [April 17, 2006]
+Version 1.2.10beta6 [April 17, 2006]
Revised the configure check for pnggccrd.c
Moved -DPNG_CONFIGURE_LIBPNG into @LIBPNG_DEFINES@
Added @LIBPNG_DEFINES@ to arguments when building libpng.sym
-version 1.2.10beta7 [April 18, 2006]
+Version 1.2.10beta7 [April 18, 2006]
Change "exec_prefix=$prefix" to "exec_prefix=$(prefix)" in makefiles.
-version 1.2.10rc1 [April 19, 2006]
+Version 1.2.10rc1 [April 19, 2006]
Ensure pngconf.h doesn't define both PNG_USE_PNGGCCRD and PNG_USE_PNGVCRD
Fixed "LN_FS" typo in makefile.sco and makefile.solaris.
-version 1.2.10rc2 [April 20, 2006]
+Version 1.2.10rc2 [April 20, 2006]
Added a backslash between -DPNG_CONFIGURE_LIBPNG and -DPNG_NO_ASSEMBLER_CODE
in configure.ac and configure
Made the configure warning about versioned symbols less arrogant.
-version 1.2.10rc3 [April 21, 2006]
+Version 1.2.10rc3 [April 21, 2006]
Added a note in libpng.txt that png_set_sig_bytes(8) can be used when
writing an embedded PNG without the 8-byte signature.
Revised makefiles and configure to avoid making links to libpng.so.*
-version 1.2.10 [April 23, 2006]
+Version 1.2.10 [April 23, 2006]
Reverted configure to "rc2" state.
-version 1.2.11beta1 [May 31, 2006]
+Version 1.2.11beta1 [May 31, 2006]
scripts/libpng.pc.in contained "configure" style version info and would
not work with makefiles.
The shared-library makefiles were linking to libpng.so.0 instead of
libpng.so.3 compatibility as the library.
-version 1.2.11beta2 [June 2, 2006]
+Version 1.2.11beta2 [June 2, 2006]
Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
buffer overflow.
Fixed bug in example.c (png_set_palette_rgb -> png_set_palette_to_rgb)
-version 1.2.11beta3 [June 5, 2006]
+Version 1.2.11beta3 [June 5, 2006]
Prepended "#! /bin/sh" to ltmail.sh and contrib/pngminus/*.sh (Cosmin).
Removed the accidental leftover Makefile.in~ (Cosmin).
Avoided potential buffer overflow and optimized buffer in
Removed the include directories and libraries from CFLAGS and LDFLAGS
in scripts/makefile.gcc (Nelson A. de Oliveira, Cosmin).
-version 1.2.11beta4 [June 6, 2006]
+Version 1.2.11beta4 [June 6, 2006]
Allow zero-length IDAT chunks after the entire zlib datastream, but not
after another intervening chunk type.
-version 1.0.19rc1, 1.2.11rc1 [June 13, 2006]
+Version 1.0.19rc1, 1.2.11rc1 [June 13, 2006]
Deleted extraneous square brackets from [config.h] in configure.ac
-version 1.0.19rc2, 1.2.11rc2 [June 14, 2006]
+Version 1.0.19rc2, 1.2.11rc2 [June 14, 2006]
Added prototypes for PNG_INCH_CONVERSIONS functions to png.h
Revised INSTALL and autogen.sh
Fixed typo in several makefiles (-W1 should be -Wl)
Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
-version 1.0.19rc3, 1.2.11rc3 [June 15, 2006]
+Version 1.0.19rc3, 1.2.11rc3 [June 15, 2006]
Removed the new typedefs for 64-bit systems (delay until version 1.4.0)
Added one zero element to png_gamma_shift[] array in pngrtran.c to avoid
reading out of bounds.
-version 1.0.19rc4, 1.2.11rc4 [June 15, 2006]
+Version 1.0.19rc4, 1.2.11rc4 [June 15, 2006]
Really removed the new typedefs for 64-bit systems.
-version 1.0.19rc5, 1.2.11rc5 [June 22, 2006]
+Version 1.0.19rc5, 1.2.11rc5 [June 22, 2006]
Removed png_sig_bytes entry from scripts/pngw32.def
-version 1.0.19, 1.2.11 [June 26, 2006]
+Version 1.0.19, 1.2.11 [June 26, 2006]
None.
-version 1.0.20, 1.2.12 [June 27, 2006]
+Version 1.0.20, 1.2.12 [June 27, 2006]
Really increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
buffer overflow.
-version 1.2.13beta1 [October 2, 2006]
+Version 1.2.13beta1 [October 2, 2006]
Removed AC_FUNC_MALLOC from configure.ac
Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
Change "logical" to "bitwise" throughout documentation.
Detect and fix attempt to write wrong iCCP profile length.
-version 1.0.21, 1.2.13 [November 14, 2006]
+Version 1.0.21, 1.2.13 [November 14, 2006]
Fix potential buffer overflow in sPLT chunk handler.
Fix Makefile.am to not try to link to noexistent files.
Check all exported functions for NULL png_ptr.
-version 1.2.14beta1 [November 17, 2006]
+Version 1.2.14beta1 [November 17, 2006]
Relocated three misplaced tests for NULL png_ptr.
Built Makefile.in with automake-1.9.6 instead of 1.9.2.
Build configure with autoconf-2.60 instead of 2.59
-version 1.2.14beta2 [November 17, 2006]
+Version 1.2.14beta2 [November 17, 2006]
Added some typecasts in png_zalloc().
-version 1.2.14rc1 [November 20, 2006]
+Version 1.2.14rc1 [November 20, 2006]
Changed "strtod" to "png_strtod" in pngrutil.c
-version 1.0.22, 1.2.14 [November 27, 2006]
+Version 1.0.22, 1.2.14 [November 27, 2006]
Added missing "$(srcdir)" in Makefile.am and Makefile.in
-version 1.2.15beta1 [December 3, 2006]
+Version 1.2.15beta1 [December 3, 2006]
Generated configure with autoconf-2.61 instead of 2.60
Revised configure.ac to update libpng.pc and libpng-config.
-version 1.2.15beta2 [December 3, 2006]
+Version 1.2.15beta2 [December 3, 2006]
Always export MMX asm functions, just stubs if not building pnggccrd.c
-version 1.2.15beta3 [December 4, 2006]
+Version 1.2.15beta3 [December 4, 2006]
Add "png_bytep" typecast to profile while calculating length in pngwutil.c
-version 1.2.15beta4 [December 7, 2006]
+Version 1.2.15beta4 [December 7, 2006]
Added scripts/CMakeLists.txt
Changed PNG_NO_ASSEMBLER_CODE to PNG_NO_MMX_CODE in scripts, like 1.4.0beta
-version 1.2.15beta5 [December 7, 2006]
+Version 1.2.15beta5 [December 7, 2006]
Changed some instances of PNG_ASSEMBLER_* to PNG_MMX_* in pnggccrd.c
Revised scripts/CMakeLists.txt
-version 1.2.15beta6 [December 13, 2006]
+Version 1.2.15beta6 [December 13, 2006]
Revised scripts/CMakeLists.txt and configure.ac
-version 1.2.15rc1 [December 18, 2006]
+Version 1.2.15rc1 [December 18, 2006]
Revised scripts/CMakeLists.txt
-version 1.2.15rc2 [December 21, 2006]
+Version 1.2.15rc2 [December 21, 2006]
Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
Added scripts/makefile.nommx
-version 1.2.15rc3 [December 25, 2006]
+Version 1.2.15rc3 [December 25, 2006]
Fixed shared library numbering error that was introduced in 1.2.15beta6.
-version 1.2.15rc4 [December 27, 2006]
+Version 1.2.15rc4 [December 27, 2006]
Fixed handling of rgb_to_gray when png_ptr->color.gray isn't set.
-version 1.2.15rc5 [December 31, 2006]
+Version 1.2.15rc5 [December 31, 2006]
Revised handling of rgb_to_gray.
-version 1.2.15 [January 5, 2007]
+Version 1.2.15 [January 5, 2007]
Added some (unsigned long) typecasts in pngtest.c to avoid printing errors.
-version 1.2.16beta1 [January 6, 2007]
+Version 1.2.16beta1 [January 6, 2007]
Fix bugs in makefile.nommx
-version 1.2.16beta2 [January 16, 2007]
+Version 1.2.16beta2 [January 16, 2007]
Revised scripts/CMakeLists.txt
-version 1.2.16 [January 31, 2007]
+Version 1.2.16 [January 31, 2007]
No changes.
-version 1.2.17beta1 [March 6, 2007]
+Version 1.2.17beta1 [March 6, 2007]
Revised scripts/CMakeLists.txt to install both shared and static libraries.
Deleted a redundant line from pngset.c.
-version 1.2.17beta2 [April 26, 2007]
+Version 1.2.17beta2 [April 26, 2007]
Relocated misplaced test for png_ptr == NULL in pngpread.c
Change "==" to "&" for testing PNG_RGB_TO_GRAY_ERR & PNG_RGB_TO_GRAY_WARN
flags.
Added "const" to some array declarations.
Mention examples of libpng usage in the libpng*.txt and libpng.3 documents.
-version 1.2.17rc1 [May 4, 2007]
+Version 1.2.17rc1 [May 4, 2007]
No changes.
-version 1.2.17rc2 [May 8, 2007]
+Version 1.2.17rc2 [May 8, 2007]
Moved several PNG_HAVE_* macros out of PNG_INTERNAL because applications
calling set_unknown_chunk_location() need them.
Changed transformation flag from PNG_EXPAND_tRNS to PNG_EXPAND in
can be free'ed in case of error. Revised unknown chunk handling in
pngrutil.c and pngpread.c to use this structure.
-version 1.2.17rc3 [May 8, 2007]
+Version 1.2.17rc3 [May 8, 2007]
Revised symbol-handling in configure script.
-version 1.2.17rc4 [May 10, 2007]
+Version 1.2.17rc4 [May 10, 2007]
Revised unknown chunk handling to avoid storing unknown critical chunks.
-version 1.0.25 [May 15, 2007]
-version 1.2.17 [May 15, 2007]
+Version 1.0.25 [May 15, 2007]
+Version 1.2.17 [May 15, 2007]
Added "png_ptr->num_trans=0" before error return in png_handle_tRNS,
to eliminate a vulnerability (CVE-2007-2445, CERT VU#684664)
-version 1.0.26 [May 15, 2007]
-version 1.2.18 [May 15, 2007]
+Version 1.0.26 [May 15, 2007]
+Version 1.2.18 [May 15, 2007]
Reverted the libpng-1.2.17rc3 change to symbol-handling in configure script
-version 1.2.19beta1 [May 18, 2007]
+Version 1.2.19beta1 [May 18, 2007]
Changed "const static" to "static PNG_CONST" everywhere, mostly undoing
change of libpng-1.2.17beta2. Changed other "const" to "PNG_CONST"
Changed some handling of unused parameters, to avoid compiler warnings.
"if (unused == NULL) return;" becomes "unused = unused".
-version 1.2.19beta2 [May 18, 2007]
+Version 1.2.19beta2 [May 18, 2007]
Only use the valid bits of tRNS value in png_do_expand() (Brian Cartier)
-version 1.2.19beta3 [May 19, 2007]
+Version 1.2.19beta3 [May 19, 2007]
Add some "png_byte" typecasts in png_check_keyword() and write new_key
instead of key in zTXt chunk (Kevin Ryde).
-version 1.2.19beta4 [May 21, 2007]
+Version 1.2.19beta4 [May 21, 2007]
Add png_snprintf() function and use it in place of sprint() for improved
defense against buffer overflows.
-version 1.2.19beta5 [May 21, 2007]
+Version 1.2.19beta5 [May 21, 2007]
Fixed png_handle_tRNS() to only use the valid bits of tRNS value.
Changed handling of more unused parameters, to avoid compiler warnings.
Removed some PNG_CONST in pngwutil.c to avoid compiler warnings.
-version 1.2.19beta6 [May 22, 2007]
+Version 1.2.19beta6 [May 22, 2007]
Added some #ifdef PNG_MMX_CODE_SUPPORTED where needed in pngvcrd.c
Added a special "_MSC_VER" case that defines png_snprintf to _snprintf
-version 1.2.19beta7 [May 22, 2007]
+Version 1.2.19beta7 [May 22, 2007]
Squelched png_squelch_warnings() in pnggccrd.c and added
an #ifdef PNG_MMX_CODE_SUPPORTED block around the declarations that caused
the warnings that png_squelch_warnings was squelching.
-version 1.2.19beta8 [May 22, 2007]
+Version 1.2.19beta8 [May 22, 2007]
Removed __MMX__ from test in pngconf.h.
-version 1.2.19beta9 [May 23, 2007]
+Version 1.2.19beta9 [May 23, 2007]
Made png_squelch_warnings() available via PNG_SQUELCH_WARNINGS macro.
Revised png_squelch_warnings() so it might work.
Updated makefile.sgcc and makefile.solaris; added makefile.solaris-x86.
-version 1.2.19beta10 [May 24, 2007]
+Version 1.2.19beta10 [May 24, 2007]
Resquelched png_squelch_warnings(), use "__attribute__((used))" instead.
-version 1.4.0beta1 [April 20, 2006]
+Version 1.4.0beta1 [April 20, 2006]
Enabled iTXt support (changes png_struct, thus requires so-number change).
Cleaned up PNG_ASSEMBLER_CODE_SUPPORTED vs PNG_MMX_CODE_SUPPORTED
Eliminated PNG_1_0_X and PNG_1_2_X macros.
Reduced dependency on C-runtime library when on Windows (Simon-Pierre)
Replaced sprintf() with png_sprintf() (Simon-Pierre)
-version 1.4.0beta2 [April 20, 2006]
+Version 1.4.0beta2 [April 20, 2006]
Revised makefiles and configure to avoid making links to libpng.so.*
Moved some leftover MMX-related defines from pngconf.h to pngintrn.h
Updated scripts/pngos2.def, pngw32.def, and projects/wince/png32ce.def
-version 1.4.0beta3 [May 10, 2006]
+Version 1.4.0beta3 [May 10, 2006]
Updated scripts/pngw32.def to comment out MMX functions.
Added PNG_NO_GET_INT_32 and PNG_NO_SAVE_INT_32 macros.
Scripts/libpng.pc.in contained "configure" style version info and would
Revised pngconf.h and added pngconf.h.in, so makefiles and configure can
pass defines to libpng and applications.
-version 1.4.0beta4 [May 11, 2006]
+Version 1.4.0beta4 [May 11, 2006]
Revised configure.ac, Makefile.am, and many of the makefiles to write
their defines in pngconf.h.
-version 1.4.0beta5 [May 15, 2006]
+Version 1.4.0beta5 [May 15, 2006]
Added a missing semicolon in Makefile.am and Makefile.in
Deleted extraneous square brackets from configure.ac
-version 1.4.0beta6 [June 2, 2006]
+Version 1.4.0beta6 [June 2, 2006]
Increased sprintf buffer from 50 to 52 chars in pngrutil.c to avoid
buffer overflow.
Changed sonum from 0 to 1.
Removed unused prototype for png_check_sig() from png.h
-version 1.4.0beta7 [June 16, 2006]
+Version 1.4.0beta7 [June 16, 2006]
Exported png_write_sig (Cosmin).
Optimized buffer in png_handle_cHRM() (Cosmin).
Set pHYs = 2835 x 2835 pixels per meter, and added
Added typedef for png_int_32 and png_uint_32 on 64-bit systems.
Added "(unsigned long)" typecast on png_uint_32 variables in printf lists.
-version 1.4.0beta8 [June 22, 2006]
+Version 1.4.0beta8 [June 22, 2006]
Added demonstration of user chunk support in pngtest.c, to support the
public sTER chunk and a private vpAg chunk.
-version 1.4.0beta9 [July 3, 2006]
+Version 1.4.0beta9 [July 3, 2006]
Removed ordinals from scripts/pngw32.def and removed png_info_int and
png_set_gray_1_2_4_to_8 entries.
Inline call of png_get_uint_32() in png_get_uint_31().
Removed WINCE and Netware projects.
Removed standalone Y2KINFO file.
-version 1.4.0beta10 [July 12, 2006]
+Version 1.4.0beta10 [July 12, 2006]
Eliminated automatic copy of pngconf.h to pngconf.h.in from configure and
some makefiles, because it was not working reliably. Instead, distribute
pngconf.h.in along with pngconf.h and cause configure and some of the
makefiles to update pngconf.h from pngconf.h.in.
Added pngconf.h to DEPENDENCIES in Makefile.am
-version 1.4.0beta11 [August 19, 2006]
+Version 1.4.0beta11 [August 19, 2006]
Removed AC_FUNC_MALLOC from configure.ac.
Added a warning when writing iCCP profile with mismatched profile length.
Patched pnggccrd.c to assemble on x86_64 platforms.
pngconf.h.in (Glenn).
Detect and fix attempt to write wrong iCCP profile length.
-version 1.4.0beta12 [October 19, 2006]
+Version 1.4.0beta12 [October 19, 2006]
Changed "logical" to "bitwise" in the documentation.
Work around Intel-Mac compiler bug by setting PNG_NO_MMX_CODE in pngconf.h
Add a typecast to stifle compiler warning in pngrutil.c
-version 1.4.0beta13 [November 10, 2006]
+Version 1.4.0beta13 [November 10, 2006]
Fix potential buffer overflow in sPLT chunk handler.
Fix Makefile.am to not try to link to noexistent files.
-version 1.4.0beta14 [November 15, 2006]
+Version 1.4.0beta14 [November 15, 2006]
Check all exported functions for NULL png_ptr.
-version 1.4.0beta15 [November 17, 2006]
+Version 1.4.0beta15 [November 17, 2006]
Relocated two misplaced tests for NULL png_ptr.
Built Makefile.in with automake-1.9.6 instead of 1.9.2.
Build configure with autoconf-2.60 instead of 2.59
Add "install: all" in Makefile.am so "configure; make install" will work.
-version 1.4.0beta16 [November 17, 2006]
+Version 1.4.0beta16 [November 17, 2006]
Added a typecast in png_zalloc().
-version 1.4.0beta17 [December 4, 2006]
+Version 1.4.0beta17 [December 4, 2006]
Changed "new_key[79] = '\0';" to "(*new_key)[79] = '\0';" in pngwutil.c
Add "png_bytep" typecast to profile while calculating length in pngwutil.c
-version 1.4.0beta18 [December 7, 2006]
+Version 1.4.0beta18 [December 7, 2006]
Added scripts/CMakeLists.txt
-version 1.4.0beta19 [May 16, 2007]
+Version 1.4.0beta19 [May 16, 2007]
Revised scripts/CMakeLists.txt
Rebuilt configure and Makefile.in with newer tools.
Added conditional #undef jmpbuf in pngtest.c to undo #define in AIX headers.
Added scripts/makefile.nommx
-version 1.4.0beta20 [July 9, 2008]
+Version 1.4.0beta20 [July 9, 2008]
Moved several PNG_HAVE_* macros from pngpriv.h to png.h because applications
calling set_unknown_chunk_location() need them.
Moved several macro definitions from pngpriv.h to pngconf.h
Deleted all use of the MMX assembler code and Intel-licensed optimizations.
Revised makefile.mingw
-version 1.4.0beta21 [July 21, 2008]
+Version 1.4.0beta21 [July 21, 2008]
Moved local array "chunkdata" from pngrutil.c to the png_struct, so
it will be freed by png_read_destroy() in case of a read error (Kurt
Christensen).
-version 1.4.0beta22 [July 21, 2008]
+Version 1.4.0beta22 [July 21, 2008]
Change "purpose" and "buffer" to png_ptr->chunkdata to avoid memory leaking.
-version 1.4.0beta23 [July 22, 2008]
+Version 1.4.0beta23 [July 22, 2008]
Change "chunkdata = NULL" to "png_ptr->chunkdata = NULL" several places in
png_decompress_chunk().
-version 1.4.0beta24 [July 25, 2008]
+Version 1.4.0beta24 [July 25, 2008]
Change all remaining "chunkdata" to "png_ptr->chunkdata" in
png_decompress_chunk(), and remove "chunkdata" from parameter list.
Put a call to png_check_chunk_name() in png_read_chunk_header().
Removed two calls to png_check_chunk_name() occuring later in the process.
Define PNG_NO_ERROR_NUMBERS by default in pngconf.h
-version 1.4.0beta25 [July 30, 2008]
+Version 1.4.0beta25 [July 30, 2008]
Added a call to png_check_chunk_name() in pngpread.c
Reverted png_check_chunk_name() to accept a name with a lowercase 3rd byte.
Added png_push_have_buffer() function to pngpread.c
Eliminated no-longer-used pngdefs.h (but it's still built in the makefiles)
Relocated a misplaced "#endif /* PNG_NO_WRITE_FILTER */" in pngwutil.c
-version 1.4.0beta26 [August 4, 2008]
+Version 1.4.0beta26 [August 4, 2008]
Removed png_push_have_buffer() function in pngpread.c. It increased the
compiled library size slightly.
Changed "-Wall" to "-W -Wall" in the CFLAGS in all makefiles (Cosmin Truta)
Updated contrib/visupng/cexcept.h to version 2.0.1
Added PNG_LITERAL_CHARACTER macros for #, [, and ].
-version 1.4.0beta27 [August 5, 2008]
+Version 1.4.0beta27 [August 5, 2008]
Revised usage of PNG_LITERAL_SHARP in pngerror.c.
Moved newline character from individual png_debug messages into the
png_debug macros.
Allow user to #define their own png_debug, png_debug1, and png_debug2.
-version 1.4.0beta28 [August 5, 2008]
+Version 1.4.0beta28 [August 5, 2008]
Revised usage of PNG_LITERAL_SHARP in pngerror.c.
Added PNG_STRING_NEWLINE macro
-version 1.4.0beta29 [August 9, 2008]
+Version 1.4.0beta29 [August 9, 2008]
Revised usage of PNG_STRING_NEWLINE to work on non-ISO compilers.
Added PNG_STRING_COPYRIGHT macro.
Added non-ISO versions of png_debug macros.
-version 1.4.0beta30 [August 14, 2008]
+Version 1.4.0beta30 [August 14, 2008]
Added premultiplied alpha feature (Volker Wiendl).
-version 1.4.0beta31 [August 18, 2008]
+Version 1.4.0beta31 [August 18, 2008]
Moved png_set_premultiply_alpha from pngtrans.c to pngrtran.c
Removed extra crc check at the end of png_handle_cHRM(). Bug introduced
in libpng-1.4.0beta20.
-version 1.4.0beta32 [August 19, 2008]
+Version 1.4.0beta32 [August 19, 2008]
Added PNG_WRITE_FLUSH_SUPPORTED block around new png_flush() call.
Revised PNG_NO_STDIO version of png_write_flush()
-version 1.4.0beta33 [August 20, 2008]
+Version 1.4.0beta33 [August 20, 2008]
Added png_get|set_chunk_cache_max() to limit the total number of sPLT,
text, and unknown chunks that can be stored.
-version 1.4.0beta34 [September 6, 2008]
+Version 1.4.0beta34 [September 6, 2008]
Shortened tIME_string to 29 bytes in pngtest.c
Fixed off-by-one error introduced in png_push_read_zTXt() function in
libpng-1.2.30beta04/pngpread.c (Harald van Dijk)
-version 1.4.0beta35 [October 6, 2008]
+Version 1.4.0beta35 [October 6, 2008]
Changed "trans_values" to "trans_color".
Changed so-number from 0 to 14. Some OS do not like 0.
Revised makefile.darwin to fix shared library numbering.
Change png_set_gray_1_2_4_to_8() to png_set_expand_gray_1_2_4_to_8()
in example.c (debian bug report)
-version 1.4.0beta36 [October 25, 2008]
+Version 1.4.0beta36 [October 25, 2008]
Sync with tEXt vulnerability fix in libpng-1.2.33rc02.
-version 1.4.0beta37 [November 13, 2008]
+Version 1.4.0beta37 [November 13, 2008]
Added png_check_cHRM in png.c and moved checking from pngget.c, pngrutil.c,
and pngwrite.c
-version 1.4.0beta38 [November 22, 2008]
+Version 1.4.0beta38 [November 22, 2008]
Added check for zero-area RGB cHRM triangle in png_check_cHRM() and
png_check_cHRM_fixed().
-version 1.4.0beta39 [November 23, 2008]
+Version 1.4.0beta39 [November 23, 2008]
Revised png_warning() to write its message on standard output by default
when warning_fn is NULL.
-version 1.4.0beta40 [November 24, 2008]
+Version 1.4.0beta40 [November 24, 2008]
Eliminated png_check_cHRM(). Instead, always use png_check_cHRM_fixed().
In png_check_cHRM_fixed(), ensure white_y is > 0, and removed redundant
check for all-zero coordinates that is detected by the triangle check.
-version 1.4.0beta41 [November 26, 2008]
+Version 1.4.0beta41 [November 26, 2008]
Fixed string vs pointer-to-string error in png_check_keyword().
Rearranged test expressions in png_check_cHRM_fixed() to avoid internal
overflows.
Added PNG_NO_CHECK_cHRM conditional.
-version 1.4.0beta42, 43 [December 1, 2008]
+Version 1.4.0beta42, 43 [December 1, 2008]
Merge png_debug with version 1.2.34beta04.
-version 1.4.0beta44 [December 6, 2008]
+Version 1.4.0beta44 [December 6, 2008]
Removed redundant check for key==NULL before calling png_check_keyword()
to ensure that new_key gets initialized and removed extra warning
(Merge with version 1.2.34beta05 -- Arvan Pritchard).
-version 1.4.0beta45 [December 9, 2008]
+Version 1.4.0beta45 [December 9, 2008]
In png_write_png(), respect the placement of the filler bytes in an earlier
call to png_set_filler() (Jim Barry).
-version 1.4.0beta46 [December 10, 2008]
+Version 1.4.0beta46 [December 10, 2008]
Undid previous change and added PNG_TRANSFORM_STRIP_FILLER_BEFORE and
PNG_TRANSFORM_STRIP_FILLER_AFTER conditionals and deprecated
PNG_TRANSFORM_STRIP_FILLER (Jim Barry).
-version 1.4.0beta47 [December 15, 2008]
+Version 1.4.0beta47 [December 15, 2008]
Support for dithering was disabled by default, because it has never
been well tested and doesn't work very well. The code has not
been removed, however, and can be enabled by building libpng with
PNG_READ_DITHER_SUPPORTED defined.
-version 1.4.0beta48 [February 14, 2009]
+Version 1.4.0beta48 [February 14, 2009]
Added new exported function png_calloc().
Combined several instances of png_malloc(); png_memset() into png_calloc().
Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
but was never defined.
-version 1.4.0beta49 [February 28, 2009]
+Version 1.4.0beta49 [February 28, 2009]
Added png_fileno() macro to pngconf.h, used in pngwio.c
Corrected order of #ifdef's in png_debug definition in png.h
Fixed bug introduced in libpng-1.4.0beta48 with the memset arguments
(bug introduced in libpng-1.2.34/1.4.0beta29).
Revised comments in png_set_read_fn() and png_set_write_fn().
-version 1.4.0beta50 [March 18, 2009]
+Version 1.4.0beta50 [March 18, 2009]
Use png_calloc() instead of png_malloc() to allocate big_row_buf when
reading an interlaced file, to avoid a possible UMR.
Undid revision of PNG_NO_STDIO version of png_write_flush(). Users
Removed fflush() from pngtest.c.
Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
-version 1.4.0beta51 [March 21, 2009]
+Version 1.4.0beta51 [March 21, 2009]
Removed new png_fileno() macro from pngconf.h .
-version 1.4.0beta52 [March 27, 2009]
+Version 1.4.0beta52 [March 27, 2009]
Relocated png_do_chop() ahead of building gamma tables in pngrtran.c
This avoids building 16-bit gamma tables unnecessarily.
Removed fflush() from pngtest.c.
Added "#define PNG_NO_WRITE_FLUSH" to contrib/pngminim/encoder/pngusr.h
Added a section on differences between 1.0.x and 1.2.x to libpng.3/libpng.txt
-version 1.4.0beta53 [April 1, 2009]
+Version 1.4.0beta53 [April 1, 2009]
Removed some remaining MMX macros from pngpriv.h
Fixed potential memory leak of "new_name" in png_write_iCCP() (Ralph Giles)
-version 1.4.0beta54 [April 13, 2009]
+Version 1.4.0beta54 [April 13, 2009]
Added "ifndef PNG_SKIP_SETJMP_CHECK" block in pngconf.h to allow
application code writers to bypass the check for multiple inclusion
of setjmp.h when they know that it is safe to ignore the situation.
pngtest now produces, and made some cosmetic changes to pngtest output.
Eliminated deprecated png_read_init_3() and png_write_init_3() functions.
-version 1.4.0beta55 [April 15, 2009]
+Version 1.4.0beta55 [April 15, 2009]
Simplified error handling in pngread.c and pngwrite.c by putting
the new png_read_cleanup() and png_write_cleanup() functions inline.
-version 1.4.0beta56 [April 25, 2009]
+Version 1.4.0beta56 [April 25, 2009]
Renamed "user_chunk_data" to "my_user_chunk_data" in pngtest.c to suppress
"shadowed declaration" warning from gcc-4.3.3.
Renamed "gamma" to "png_gamma" in pngset.c to avoid "shadowed declaration"
warning about a global "gamma" variable in math.h on some platforms.
-version 1.4.0beta57 [May 2, 2009]
+Version 1.4.0beta57 [May 2, 2009]
Removed prototype for png_freeptr() that was added in libpng-1.4.0beta24
but was never defined (again).
Rebuilt configure scripts with autoconf-2.63 instead of 2.62
Removed pngprefs.h and MMX from makefiles
-version 1.4.0beta58 [May 14, 2009]
+Version 1.4.0beta58 [May 14, 2009]
Changed pngw32.def to pngwin.def in makefile.mingw (typo was introduced
in beta57).
Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri)
-version 1.4.0beta59 [May 15, 2009]
+Version 1.4.0beta59 [May 15, 2009]
Reformated sources in libpng style (3-space intentation, comment format)
Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG)
Added sections about the git repository and our coding style to the
documentation
Relocated misplaced #endif in pngwrite.c, sCAL chunk handler.
-version 1.4.0beta60 [May 19, 2009]
+Version 1.4.0beta60 [May 19, 2009]
Conditionally compile png_read_finish_row() which is not used by
progressive readers.
Added contrib/pngminim/preader to demonstrate building minimal progressive
decoder, based on contrib/gregbook with embedded libpng and zlib.
-version 1.4.0beta61 [May 20, 2009]
+Version 1.4.0beta61 [May 20, 2009]
In contrib/pngminim/*, renamed "makefile.std" to "makefile", since there
is only one makefile in those directories, and revised the README files
accordingly.
More reformatting of comments, mostly to capitalize sentences.
-version 1.4.0beta62 [June 2, 2009]
+Version 1.4.0beta62 [June 2, 2009]
Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h
and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h
Reformatted several remaining "else statement" into two lines.
Added a section to the libpng documentation about using png_get_io_ptr()
in configure scripts to detect the presence of libpng.
-version 1.4.0beta63 [June 15, 2009]
+Version 1.4.0beta63 [June 15, 2009]
Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR()
multiple times and to specify the sample order in the tRNS chunk,
because the ISO PNG specification has a typo in the tRNS table.
Adopted preference for consistent use of "#ifdef" and "#ifndef" versus
"#if defined()" and "if !defined()" where possible.
-version 1.4.0beta64 [June 24, 2009]
+Version 1.4.0beta64 [June 24, 2009]
Eliminated PNG_LEGACY_SUPPORTED code.
Moved the various unknown chunk macro definitions outside of the
PNG_READ|WRITE_ANCILLARY_CHUNK_SUPPORTED blocks.
-version 1.4.0beta65 [June 26, 2009]
+Version 1.4.0beta65 [June 26, 2009]
Added a reference to the libpng license in each file.
-version 1.4.0beta66 [June 27, 2009]
+Version 1.4.0beta66 [June 27, 2009]
Refer to the libpng license instead of the libpng license in each file.
-version 1.4.0beta67 [July 6, 2009]
+Version 1.4.0beta67 [July 6, 2009]
Relocated INVERT_ALPHA within png_read_png() and png_write_png().
Added high-level API transform PNG_TRANSFORM_GRAY_TO_RGB.
Added an "xcode" project to the projects directory (Alam Arias).
-version 1.4.0beta68 [July 19, 2009]
+Version 1.4.0beta68 [July 19, 2009]
Avoid some tests in filter selection in pngwutil.c
-version 1.4.0beta69 [July 25, 2009]
+Version 1.4.0beta69 [July 25, 2009]
Simplified the new filter-selection test. This runs faster in the
common "PNG_ALL_FILTERS" and PNG_FILTER_NONE cases.
Removed extraneous declaration from the new call to png_read_gray_to_rgb()
Fixed up xcode project (Alam Arias)
Added a prototype for png_64bit_product() in png.c
-version 1.4.0beta70 [July 27, 2009]
+Version 1.4.0beta70 [July 27, 2009]
Avoid a possible NULL dereference in debug build, in png_set_text_2().
(bug introduced in libpng-0.95, discovered by Evan Rouault)
-version 1.4.0beta71 [July 29, 2009]
+Version 1.4.0beta71 [July 29, 2009]
Rebuilt configure scripts with autoconf-2.64.
-version 1.4.0beta72 [August 1, 2009]
+Version 1.4.0beta72 [August 1, 2009]
Replaced *.tar.lzma with *.tar.xz in distribution. Get the xz codec
from <http://tukaani.org/xz>.
-version 1.4.0beta73 [August 1, 2009]
+Version 1.4.0beta73 [August 1, 2009]
Reject attempt to write iCCP chunk with negative embedded profile length
(JD Chen)
-version 1.4.0beta74 [August 8, 2009]
+Version 1.4.0beta74 [August 8, 2009]
Changed png_ptr and info_ptr member "trans" to "trans_alpha".
-version 1.4.0beta75 [August 21, 2009]
+Version 1.4.0beta75 [August 21, 2009]
Removed an extra png_debug() recently added to png_write_find_filter().
Fixed incorrect #ifdef in pngset.c regarding unknown chunk support.
-version 1.4.0beta76 [August 22, 2009]
+Version 1.4.0beta76 [August 22, 2009]
Moved an incorrectly located test in png_read_row() in pngread.c
-version 1.4.0beta77 [August 27, 2009]
+Version 1.4.0beta77 [August 27, 2009]
Removed lpXYZ.tar.bz2 (with CRLF), KNOWNBUG, libpng-x.y.z-KNOWNBUG.txt,
and the "noconfig" files from the distribution.
Moved CMakeLists.txt from scripts into the main libpng directory.
Various bugfixes and improvements to CMakeLists.txt (Philip Lowman)
-version 1.4.0beta78 [August 31, 2009]
+Version 1.4.0beta78 [August 31, 2009]
Converted all PNG_NO_* tests to PNG_*_SUPPORTED everywhere except pngconf.h
Eliminated PNG_NO_FREE_ME and PNG_FREE_ME_SUPPORTED macros.
Use png_malloc plus a loop instead of png_calloc() to initialize
row_pointers in png_read_png().
-version 1.4.0beta79 [September 1, 2009]
+Version 1.4.0beta79 [September 1, 2009]
Eliminated PNG_GLOBAL_ARRAYS and PNG_LOCAL_ARRAYS; always use local arrays.
Eliminated PNG_CALLOC_SUPPORTED macro and always provide png_calloc().
-version 1.4.0beta80 [September 17, 2009]
+Version 1.4.0beta80 [September 17, 2009]
Removed scripts/libpng.icc
Changed typecast of filler from png_byte to png_uint_16 in png_set_filler().
(Dennis Gustafsson)
Fixed typo introduced in beta78 in pngtest.c ("#if def " should be "#ifdef ")
-version 1.4.0beta81 [September 23, 2009]
+Version 1.4.0beta81 [September 23, 2009]
Eliminated unused PNG_FLAG_FREE_* defines from pngpriv.h
Expanded TAB characters in pngrtran.c
Removed PNG_CONST from all "PNG_CONST PNG_CHNK" declarations to avoid
Changed all "#if [!]defined(X)" to "if[n]def X" where possible.
Eliminated unused png_ptr->row_buf_size
-version 1.4.0beta82 [September 25, 2009]
+Version 1.4.0beta82 [September 25, 2009]
Moved redundant IHDR checking into new png_check_IHDR() in png.c
and report all errors found in the IHDR data.
Eliminated useless call to png_check_cHRM() from pngset.c
-version 1.4.0beta83 [September 25, 2009]
+Version 1.4.0beta83 [September 25, 2009]
Revised png_check_IHDR() to eliminate bogus complaint about filter_type.
-version 1.4.0beta84 [September 30, 2009]
+Version 1.4.0beta84 [September 30, 2009]
Fixed some inconsistent indentation in pngconf.h
Revised png_check_IHDR() to add a test for width variable less than 32-bit.
-version 1.4.0beta85 [October 1, 2009]
+Version 1.4.0beta85 [October 1, 2009]
Revised png_check_IHDR() again, to check info_ptr members instead of
the contents of the returned parameters.
-version 1.4.0beta86 [October 9, 2009]
+Version 1.4.0beta86 [October 9, 2009]
Updated the "xcode" project (Alam Arias).
Eliminated a shadowed declaration of "pp" in png_handle_sPLT().
-version 1.4.0rc01 [October 19, 2009]
+Version 1.4.0rc01 [October 19, 2009]
Trivial cosmetic changes.
-version 1.4.0beta87 [October 30, 2009]
+Version 1.4.0beta87 [October 30, 2009]
Moved version 1.4.0 back into beta.
-version 1.4.0beta88 [October 30, 2009]
+Version 1.4.0beta88 [October 30, 2009]
Revised libpng*.txt section about differences between 1.2.x and 1.4.0
because most of the new features have now been ported back to 1.2.41
-version 1.4.0beta89 [November 1, 2009]
+Version 1.4.0beta89 [November 1, 2009]
More bugfixes and improvements to CMakeLists.txt (Philip Lowman)
Removed a harmless extra png_set_invert_alpha() from pngwrite.c
Apply png_user_chunk_cache_max within png_decompress_chunk().
Merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate.
-version 1.4.0beta90 [November 2, 2009]
+Version 1.4.0beta90 [November 2, 2009]
Removed all remaining WIN32_WCE #ifdefs except those involving the
time.h "tm" structure
-version 1.4.0beta91 [November 3, 2009]
+Version 1.4.0beta91 [November 3, 2009]
Updated scripts/pngw32.def and projects/wince/png32ce.def
Copied projects/wince/png32ce.def to the scripts directory.
Added scripts/makefile.wce
Patched ltmain.sh for wince support.
Added PNG_CONVERT_tIME_SUPPORTED macro.
-version 1.4.0beta92 [November 4, 2009]
+Version 1.4.0beta92 [November 4, 2009]
Make inclusion of time.h in pngconf.h depend on PNG_CONVERT_tIME_SUPPORTED
Make #define PNG_CONVERT_tIME_SUPPORTED depend on PNG_WRITE_tIME_SUPPORTED
Revised libpng*.txt to describe differences from 1.2.40 to 1.4.0 (instead
of differences from 1.2.41 to 1.4.0)
-version 1.4.0beta93 [November 7, 2009]
+Version 1.4.0beta93 [November 7, 2009]
Added PNG_DEPSTRUCT, PNG_DEPRECATED, PNG_USE_RESULT, PNG_NORETURN, and
PNG_ALLOCATED macros to detect deprecated direct access to the
png_struct or info_struct members and other deprecated usage in
Moved the synopsis lines for png_read_destroy(), png_write_destroy()
png_debug(), png_debug1(), and png_debug2() from libpng.3 to libpngpf.3.
-version 1.4.0beta94 [November 9, 2009]
+Version 1.4.0beta94 [November 9, 2009]
Removed the obsolete, unused pnggccrd.c and pngvcrd.c files.
Updated CMakeLists.txt to add "-DPNG_CONFIGURE_LIBPNG" to the definitions.
Removed dependency of pngtest.o on pngpriv.h in the makefiles.
Only #define PNG_DEPSTRUCT, etc. in pngconf.h if not already defined.
-version 1.4.0beta95 [November 10, 2009]
+Version 1.4.0beta95 [November 10, 2009]
Changed png_check_sig() to !png_sig_cmp() in contrib programs.
Added -DPNG_CONFIGURE_LIBPNG to contrib/pngminm/*/makefile
Changed png_check_sig() to !png_sig_cmp() in contrib programs.
Changed pngminim/*/gather.sh to stop trying to remove pnggccrd.c and pngvcrd.c
Added dependency on pngpriv.h in contrib/pngminim/*/makefile
-version 1.4.0beta96 [November 12, 2009]
+Version 1.4.0beta96 [November 12, 2009]
Renamed scripts/makefile.wce to scripts/makefile.cegcc
Revised Makefile.am to use libpng.sys while building libpng.so
so that only PNG_EXPORT functions are exported.
(evidently the same change made in libpng-1.0beta54 was lost).
Added PNG_PRIVATE macro definition in pngconf.h for possible future use.
-version 1.4.0beta97 [November 13, 2009]
+Version 1.4.0beta97 [November 13, 2009]
Restored pngtest.png to the libpng-1.4.0beta7 version.
Removed projects/beos and netware.txt; no one seems to be supporting them.
Revised Makefile.in
-version 1.4.0beta98 [November 13, 2009]
+Version 1.4.0beta98 [November 13, 2009]
Added the "xcode" project to zip distributions,
Fixed a typo in scripts/pngwin.def introduced in beta97.
-version 1.4.0beta99 [November 14, 2009]
+Version 1.4.0beta99 [November 14, 2009]
Moved libpng-config.in and libpng.pc-configure.in out of the scripts
directory, to libpng-config.in and libpng-pc.in, respectively, and
modified Makefile.am and configure.ac accordingly. Now "configure"
needs nothing from the "scripts" directory.
Avoid redefining PNG_CONST in pngconf.h
-version 1.4.0beta100 [November 14, 2009]
+Version 1.4.0beta100 [November 14, 2009]
Removed ASM builds from projects/visualc6 and projects/visualc71
Removed scripts/makefile.nommx and makefile.vcawin32
Revised CMakeLists.txt to account for new location of libpng-config.in
and libpng-pc.in
Updated INSTALL to reflect removal and relocation of files.
-version 1.4.0beta101 [November 14, 2009]
+Version 1.4.0beta101 [November 14, 2009]
Restored the binary files (*.jpg, *.png, some project files) that were
accidentally deleted from the zip and 7z distributions when the xcode
project was added.
-version 1.4.0beta102 [November 18, 2009]
+Version 1.4.0beta102 [November 18, 2009]
Added libpng-config.in and libpng-pc.in to the zip and 7z distributions.
Fixed a typo in projects/visualc6/pngtest.dsp, introduced in beta100.
Moved descriptions of makefiles and other scripts out of INSTALL into
scripts/README.txt
Updated the copyright year in scripts/pngwin.rc from 2006 to 2009.
-version 1.4.0beta103 [November 21, 2009]
+Version 1.4.0beta103 [November 21, 2009]
Removed obsolete comments about ASM from projects/visualc71/README_zlib.txt
Align row_buf on 16-byte boundary in memory.
Restored the PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED guard around the call
jmp_buf buffer, and marked direct access to jmpbuf 'deprecated'.
(John Bowler)
-version 1.4.0beta104 [November 22, 2009]
+Version 1.4.0beta104 [November 22, 2009]
Removed png_longjmp_ptr from scripts/*.def and libpng.3
Rebuilt configure scripts with autoconf-2.65
-version 1.4.0beta105 [November 25, 2009]
+Version 1.4.0beta105 [November 25, 2009]
Use fast integer PNG_DIVIDE_BY_255() or PNG_DIVIDE_BY_65535()
to accomplish alpha premultiplication when
PNG_READ_COMPOSITE_NODIV_SUPPORTED is defined.
Changed "/255" to "/255.0" in background calculations to make it clear
that the 255 is used as a double.
-version 1.4.0beta106 [November 27, 2009]
+Version 1.4.0beta106 [November 27, 2009]
Removed premultiplied alpha feature.
-version 1.4.0beta107 [December 4, 2009]
+Version 1.4.0beta107 [December 4, 2009]
Updated README
Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.
Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco
to put png.h and pngconf.h in $prefix/include, like the other scripts,
instead of in $prefix/include/libpng. Also revised makefile.sco
- to put them in $prefix/include/libpng14 instead of in
- $prefix/include/libpng/libpng14.
+ to put them in $prefix/include/libpng15 instead of in
+ $prefix/include/libpng/libpng15.
-version 1.4.0beta108 [December 11, 2009]
+Version 1.4.0beta108 [December 11, 2009]
Removed leftover "-DPNG_CONFIGURE_LIBPNG" from contrib/pngminim/*/makefile
Relocated png_do_chop() to its original position in pngrtran.c; the
change in version 1.2.41beta08 caused transparency to be handled wrong
in some 16-bit datastreams (Yusaku Sugai).
-version 1.4.0beta109 [December 13, 2009]
+Version 1.4.0beta109 [December 13, 2009]
Added "bit_depth" parameter to the private png_build_gamma_table() function.
Pass bit_depth=8 to png_build_gamma_table() when bit_depth is 16 but the
PNG_16_TO_8 transform has been set, to avoid unnecessary build of 16-bit
tables.
-version 1.4.0rc02 [December 20, 2009]
+Version 1.4.0rc02 [December 20, 2009]
Declared png_cleanup_needed "volatile" in pngread.c and pngwrite.c
-version 1.4.0rc03 [December 22, 2009]
+Version 1.4.0rc03 [December 22, 2009]
Renamed libpng-pc.in back to libpng.pc.in and revised CMakeLists.txt
(revising the change in 1.4.0beta99)
-version 1.4.0rc04 [December 25, 2009]
+Version 1.4.0rc04 [December 25, 2009]
Swapped PNG_UNKNOWN_CHUNKS_SUPPORTED and PNG_HANDLE_AS_UNKNOWN_SUPPORTED
in pngset.c to be consistent with other changes in version 1.2.38.
-version 1.4.0rc05 [December 25, 2009]
+Version 1.4.0rc05 [December 25, 2009]
Changed "libpng-pc.in" to "libpng.pc.in" in configure.ac, configure, and
Makefile.in to be consistent with changes in libpng-1.4.0rc03
-version 1.4.0rc06 [December 29, 2009]
+Version 1.4.0rc06 [December 29, 2009]
Reverted the gamma_table changes from libpng-1.4.0beta109.
Fixed some indentation errors.
-version 1.4.0rc07 [January 1, 2010]
+Version 1.4.0rc07 [January 1, 2010]
Revised libpng*.txt and libpng.3 about 1.2.x->1.4.x differences.
Use png_calloc() instead of png_malloc(); png_memset() in pngrutil.c
Update copyright year to 2010.
-version 1.4.0rc08 [January 2, 2010]
+Version 1.4.0rc08 [January 2, 2010]
Avoid deprecated references to png_ptr-io_ptr and png_ptr->error_ptr
in pngtest.c
-version 1.4.0 [January 3, 2010]
+Version 1.4.0 [January 3, 2010]
No changes.
-version 1.4.1beta01 [January 8, 2010]
+Version 1.4.1beta01 [January 8, 2010]
Updated CMakeLists.txt for consistent indentation and to avoid an
unclosed if-statement warning (Philip Lowman).
Revised Makefile.am and Makefile.in to remove references to Y2KINFO,
Revised Makefile.am and Makefile.in to simplify their maintenance.
Revised scripts/makefile.linux to install a link to libpng14.so.14.1
-version 1.4.1beta02 [January 9, 2010]
+Version 1.4.1beta02 [January 9, 2010]
Revised the rest of the makefiles to install a link to libpng14.so.14.1
-version 1.4.1beta03 [January 10, 2010]
+Version 1.4.1beta03 [January 10, 2010]
Removed png_set_premultiply_alpha() from scripts/*.def
-version 1.4.1rc01 [January 16, 2010]
+Version 1.4.1rc01 [January 16, 2010]
No changes.
-version 1.4.1beta04 [January 23, 2010]
+Version 1.4.1beta04 [January 23, 2010]
Revised png_decompress_chunk() to improve speed and memory usage when
decoding large chunks.
Added png_set|get_chunk_malloc_max() functions.
-version 1.4.1beta05 [January 26, 2010]
+Version 1.4.1beta05 [January 26, 2010]
Relocated "int k" declaration in pngtest.c to minimize its scope.
-version 1.4.1beta06 [January 28, 2010]
+Version 1.4.1beta06 [January 28, 2010]
Revised png_decompress_chunk() to use a two-pass method suggested by
John Bowler.
-version 1.4.1beta07 [February 6, 2010]
+Version 1.4.1beta07 [February 6, 2010]
Folded some long lines in the source files.
Added defineable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX,
and a PNG_USER_LIMITS_SUPPORTED flag.
png_ptr->png_user_chunk_malloc_max.
Revised png_push_save_buffer() to do fewer but larger png_malloc() calls.
-version 1.4.1beta08 [February 6, 2010]
+Version 1.4.1beta08 [February 6, 2010]
Minor cleanup and updating of dates and copyright year.
-version 1.4.1beta09 [February 7, 2010]
+Version 1.5.0beta01 [February 7, 2010]
+ Moved declaration of png_struct into private pngstruct.h and png_info
+ into pnginfo.h
+
+Version 1.4.1beta09 and 1.5.0beta02 [February 7, 2010]
Reverted to original png_push_save_buffer() code.
-version 1.4.1beta10 [February 9, 2010]
- Return allocated "old_buffer" in png_push_save_buffer() before calling
- png_error(), to avoid a potential memory leak.
+Version 1.4.1beta10 and 1.5.0beta03 [February 8, 2010]
+ Return allocated "old_buffer" in png_push_save_buffer() before
+ calling png_error(), to avoid a potential memory leak.
+ Updated configure script to use SO number 15.
-version 1.4.1beta11 [February 12, 2010]
- Relocated misplaced closing curley bracket in png_decompress_chunk().
- Removed unused "buffer_size" variable from png_decompress_chunk().
+Version 1.5.0beta04 [February 9, 2010]
+ Removed malformed "incomplete struct declaration" of png_info from png.h
+
+Version 1.5.0beta05 [February 12, 2010]
+ Removed PNG_DEPSTRUCT markup in pngstruct.h and pnginfo.h, and undid the
+ linewrapping that it entailed.
+ Revised comments in pngstruct.h and pnginfo.h and added pointers to
+ the libpng license.
+ Changed PNG_INTERNAL to PNG_EXPOSE_INTERNAL_STRUCTURES
Removed the cbuilder5 project, which has not been updated to 1.4.0.
- Complete rewrite of two-pass png_decompress_chunk() by John Bowler.
-version 1.4.1beta12 [February 14, 2010]
- Fixed type declaration of png_get_user_malloc_max() in pngget.c (Daisuke
+Version 1.4.1beta12 and 1.5.0beta06 [February 14, 2010]
+ Fixed type declaration of png_get_chunk_malloc_max() in pngget.c (Daisuke
Nishikawa)
-version 1.4.1rc02 [January 18, 2010]
- No changes.
+Version 1.5.0beta07 [omitted]
-version 1.4.1rc03 [February 19, 2010]
+Version 1.5.0beta08 [February 19, 2010]
+ Changed #ifdef PNG_NO_STDIO_SUPPORTED to #ifdef PNG_NO_CONSOLE_IO_SUPPORTED
+ wherever png_snprintf() is used to construct error and warning messages.
Noted in scripts/makefile.mingw that it expects to be run under MSYS.
Removed obsolete unused MMX-querying support from contrib/gregbook
+ Added exported png_longjmp() function.
Removed the AIX redefinition of jmpbuf in png.h
- Define _ALL_SOURCE in configure.ac, makefile.aix, and CMakeLists.txt
- when using AIX compiler.
+ Added -D_ALLSOURCE in configure.ac, makefile.aix, and CMakeLists.txt
+ when building on AIX.
+
+Version 1.5.0beta09 [February 19, 2010]
+ Removed -D_ALLSOURCE from configure.ac, makefile.aix, and CMakeLists.txt.
+ Changed the name of png_ptr->jmpbuf to png_ptr->png_jmpbuf in pngstruct.h
-version 1.4.1rc04 [February 19, 2010]
+Version 1.5.0beta10 [February 25, 2010]
Removed unused gzio.c from contrib/pngminim gather and makefile scripts
+ Removed replacement error handlers from contrib/gregbook. Because of
+ the new png_longjmp() function they are no longer needed.
-version 1.4.1 [February 25, 2010]
+Version 1.5.0beta11 [March 6, 2010]
+ Removed checking for already-included setjmp.h from pngconf.h
+ Fixed inconsistent indentations and made numerous cosmetic changes.
+ Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5
-version 1.4.2beta01 [April 1, 2010]
- Conditionally compile an "else" statement in png_decompress_chunk().
- Restored the macro definition of png_check_sig().
+Version 1.5.0beta12 [March 9, 2010]
+ Moved "#include png.h" inside pngpriv.h and removed "#include png.h" from
+ the source files, along with "#define PNG_EXPOSE_INTERNAL_STRUCTURES"
+ and "#define PNG_NO_PEDANTIC_WARNINGS" (John Bowler).
+ Created new pngdebug.h and moved debug definitions there.
-version 1.4.2rc01 [April 10, 2010]
- No changes.
+Version 1.5.0beta13 [March 10, 2010]
+ Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice.
+ Revise the "#ifdef" blocks in png_inflate() so it will compile when neither
+ PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
+ is defined.
+ Removed unused png_measure_compressed_chunk() from pngpriv.h and libpngpf.3
+ Moved the 'config.h' support from pngconf.h to pngpriv.h
+ Removed PNGAPI from the png_longjmp_ptr typedef.
+ Eliminated dependence of pngtest.c on the private pngdebug.h file.
+ Make all png_debug macros into *unterminated* statements or
+ expressions (i.e. a trailing ';' must always be added) and correct
+ the format statements in various png_debug messages.
+
+Version 1.5.0beta14 [March 14, 2010]
+ Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c
+ Revised Makefile.am to account for recent additions and replacements.
+ Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and
+ added ordinal numbers to the Windows DEF file and corrected the duplicated
+ ordinal numbers on CE symbols that are commented out.
+ Added back in export symbols that can be present in the Windows build but
+ are disabled by default.
+ PNG_EXPORT changed to include an 'ordinal' field for DEF file generation.
+ PNG_CALLBACK added to make callback definitions uniform. PNGAPI split
+ into PNGCAPI (base C form), PNGAPI (exports) and PNGCBAPI (callbacks),
+ and appropriate changes made to all files. Cygwin builds re-hinged to
+ allow procedure call standard changes and to remove the need for the DEF
+ file (fixes build on Cygwin).
+ Enabled 'attribute' warnings that are relevant to library APIs and callbacks.
+ Changed rules for generation of the various symbol files and added a new
+ rule for a DEF file (which is also added to the distribution).
+ Updated the symbol file generation to stop it adding spurious spaces
+ to EOL (coming from preprocessor macro expansion). Added a facility
+ to join tokens in the output and rewrite *.dfn to use this.
+ Eliminated scripts/*.def in favor of libpng.def; updated projects/visualc71
+ and removed scripts/makefile.cygwin.
+ Made PNG_BUILD_DLL safe: it can be set whenever a DLL is being built.
+ Removed the include of sys/types.h - apparently unnecessary now on the
+ platforms on which it happened (all but Mac OS and RISC OS).
+ Moved the Mac OS test into pngpriv.h (the only place it is used.)
+
+Version 1.5.0beta15 [March 17, 2010]
+ Added symbols.chk target to Makefile.am to validate the symbols in png.h
+ against the new DEF file scripts/symbols.def.
+ Changed the default DEF file back to pngwin.def.
+ Removed makefile.mingw.
+ Eliminated PNG_NO_EXTERN and PNG_ALL_EXTERN
+
+Version 1.5.0beta16 [April 1, 2010]
+ Make png_text_struct independent of PNG_iTXt_SUPPORTED, so that
+ fields are initialized in all configurations. The READ/WRITE
+ macros (PNG_(READ|WRITE)_iTXt_SUPPORTED) still function as
+ before to disable code to actually read or write iTXt chunks
+ and iTXt_SUPPORTED can be used to detect presence of either
+ read or write support (but it is probably better to check for
+ the one actually required - read or write.)
+ Combined multiple png_warning() calls for a single error.
+ Restored the macro definition of png_check_sig().
-version 1.4.2rc02 [April 16, 2010]
+Version 1.5.0beta17 [April 17, 2010]
+ Added some "(long)" typecasts to printf calls in png_handle_cHRM().
Documented the fact that png_set_dither() was disabled since libpng-1.4.0.
Reenabled png_set_dither() but renamed it to png_set_quantize() to reflect
more accurately what it actually does. At the same time, renamed
the PNG_DITHER_[RED,GREEN_BLUE]_BITS macros to
PNG_QUANTIZE_[RED,GREEN,BLUE]_BITS.
-
-version 1.4.2rc03 [April 24, 2010]
Added some "(long)" typecasts to printf calls in png_handle_cHRM().
+ Freeze build-time only configuration in the build.
+ In all prior versions of libpng most configuration options
+ controlled by compiler #defines had to be repeated by the
+ application code that used libpng. This patch changes this
+ so that compilation options that can only be changed at build
+ time are frozen in the build. Options that are compiler
+ dependent (and those that are system dependent) are evaluated
+ each time - pngconf.h holds these. Options that can be changed
+ per-file in the application are in png.h. Frozen options are
+ in the new installed header file pnglibconf.h (John Bowler)
+ Removed the xcode project because it has not been updated to work
+ with libpng-1.5.0.
+ Removed the ability to include optional pngusr.h
+
+Version 1.5.0beta18 [April 17, 2010]
+ Restored the ability to include optional pngusr.h
+ Moved replacements for png_error() and png_warning() from the
+ contrib/pngminim project to pngerror.c, for use when warnings or
+ errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid
+ storing unneeded error/warning text.
+ Updated contrib/pngminim project to work with the new pnglibconf.h
+ Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space.
+
+Version 1.5.0beta19 [April 24, 2010]
+ Added PNG_{READ,WRITE}_INT_FUNCTIONS_SUPPORTED. This allows the functions
+ to read and write ints to be disabled independently of PNG_USE_READ_MACROS,
+ which allows libpng to be built with the functions even though the default
+ is to use the macros - this allows applications to choose at app build
+ time whether or not to use macros (previously impossible because the
+ functions weren't in the default build.)
+ Changed Windows calling convention back to __cdecl for API functions.
+ For Windows/x86 platforms only:
+ __stdcall is no longer needed for Visual Basic, so libpng-1.5.0 uses
+ __cdecl throughout (both API functions and callbacks) on Windows/x86
+ platforms.
+ Replaced visualc6 and visualc71 projects with new vstudio project
Relaxed the overly-restrictive permissions of some files.
-version 1.4.2rc04 [April 28, 2010]
- Added the "vstudio" project to replace "visualc6" and "visualc71" which
- will be removed from libpng-1.5.0.
- Demonstrate in example.c that lang_key should be initialized.
+Version 1.5.0beta20 [April 24, 2010]
+ Relaxed more overly-restrictive permissions of some files.
+
+Version 1.5.0beta21 [April 27, 2010]
+ Removed some unwanted binary bytes and changed CRLF to NEWLINE in the new
+ vstudio project files, and some trivial editing of some files in the
+ scripts directory.
Set PNG_NO_READ_BGR, PNG_NO_IO_STATE, and PNG_NO_TIME_RFC1123 in
contrib/pngminim/decoder/pngusr.h to make a smaller decoder application.
-version 1.4.2rc05 [April 29, 2010]
- Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined.
- Removed dummy_inflate.c and uncompr.c from contrib/pngminim/encoder
+Version 1.5.0beta22 [April 28, 2010]
+ Fixed dependencies of GET_INT_32 - it does not require READ_INT_FUNCTIONS
+ because it has a macro equivalent.
+ Improved the options.awk script; added an "everything off" option.
+ Revised contrib/pngminim to use the "everything off" option in pngusr.dfa.
+
+Version 1.5.0beta23 [April 29, 2010]
+ Corrected PNG_REMOVED macro to take five arguments.
+ The macro was documented with two arguments (name,ordinal), however
+ the symbol checking .dfn files assumed five arguments. The five
+ argument form seems more useful so it is changed to that.
Corrected PNG_UNKNOWN_CHUNKS_SUPPORTED to PNG_HANDLE_AS_UNKNOWN_SUPPORTED
in gregbook/readpng2.c
Corrected protection of png_get_user_transform_ptr. The API declaration in
png.h is removed if both READ and WRITE USER_TRANSFORM are turned off
but was left defined in pngtrans.c
+ Added logunsupported=1 to cause pnglibconf.h to document disabled options.
+ This makes the installed pnglibconf.h more readable but causes no
+ other change. The intention is that users of libpng will find it
+ easier to understand if an API they need is missing.
+ Include png_reset_zstream() in png.c only when PNG_READ_SUPPORTED is defined.
+ Removed dummy_inflate.c from contrib/pngminim/encoder
+ Removed contrib/pngminim/*/gather.sh; gathering is now done in the makefile.
-version 1.4.2rc06 [May 3, 2010]
- Moved declarations of umsg[] inside the proper #ifdef blocks in pngrutil.c
-
-version 1.4.2 [May 6, 2010]
+Version 1.5.0beta24 [May 7, 2010]
+ Use bitwise "&" instead of arithmetic mod in pngrutil.c calculation of the
+ offset of the png_ptr->rowbuf pointer into png_ptr->big_row_buf.
+ Added more blank lines for readability.
-version 1.4.3beta01 [June 18, 2010]
- Added missing quotation marks in the aix block of configure.ac
- The new "vstudio" project was missing from the zip and 7z distributions.
+Version 1.5.0beta25 [June 18, 2010]
In pngpread.c: png_push_have_row() add check for new_row > height
-
-version 1.4.3beta02 [June 18, 2010]
Removed the now-redundant check for out-of-bounds new_row from example.c
-version 1.4.3beta03 [June 18, 2010]
- In pngpread.c: png_push_finish_row() add check for too many rows.
-
-version 1.4.3beta04 [June 19, 2010]
+Version 1.5.0beta26 [June 18, 2010]
In pngpread.c: png_push_process_row() add check for too many rows.
- Removed the checks added in beta01 and beta03, as they are now redundant.
-version 1.4.3beta05 [June 20, 2010]
+Version 1.5.0beta27 [June 18, 2010]
+ Removed the check added in beta25 as it is now redundant.
+
+Version 1.5.0beta28 [June 20, 2010]
Rewrote png_process_IDAT_data to consistently treat extra data as warnings
and handle end conditions more cleanly.
- Removed the new (beta04) check in png_push_process_row().
+ Removed the new (beta26) check in png_push_process_row().
-version 1.4.3rc01 [June 21, 2010]
- Revised some comments in png_process_IDAT_data().
+Version 1.5.0beta29 [June 21, 2010]
+ Revised scripts/options.awk to work on Sunos (but still doesn't work)
+ Added comment to options.awk and contrib/pngminim/*/makefile to try nawk.
-version 1.4.3rc02 [June 22, 2010]
- Changed char *msg to PNG_CONST char *msg in pngrutil.c
+Version 1.5.0beta30 [June 22, 2010]
Stop memory leak when reading a malformed sCAL chunk.
- Removed some trailing blanks.
-version 1.4.3rc03 [June 23, 2010]
- Revised pngpread.c patch of beta05 to avoid an endless loop.
+Version 1.5.0beta31 [June 26, 2010]
+ Revised pngpread.c patch of beta28 to avoid an endless loop.
+ Removed some trailing blanks.
-version 1.4.3 [June 26, 2010]
- Updated some of the "last changed" dates.
+Version 1.5.0beta32 [June 26, 2010]
+ Removed leftover scripts/options.patch and scripts/options.rej
-version 1.4.4beta01 [July 12, 2010]
- Removed extraneous new_push_process_row.c file.
- Revised the "SEE ALSO" style of libpng.3, libpngpf.3, and png.5
- Removed some newly-added TAB characters from pngpread.c.
- Fixed some indentation in pngpread.c and pngrutil.c
+Version 1.5.0beta33 [July 6, 3010]
+ Made FIXED and FLOATING options consistent in the APIs they enable and
+ disable. Corrected scripts/options.awk to handle both command line
+ options and options specified in the .dfa files.
+ Changed char *msg to PNG_CONST char *msg in pngrutil.c
+ Make png_set_sRGB_gAMA_and_cHRM set values using either the fixed or
+ floating point APIs, but not both.
+ Reversed patch to remove error handler when the jmp_buf is stored in the
+ main program structure, not the png_struct.
+ The error handler is needed because the default handler in libpng will
+ always use the jmp_buf in the library control structure; this is never
+ set. The gregbook code is a useful example because, even though it
+ uses setjmp/longjmp, it shows how error handling can be implemented
+ using control mechanisms not directly supported by libpng. The
+ technique will work correctly with mechanisms such as Microsoft
+ Structure Exceptions or C++ exceptions (compiler willing - note that gcc
+ does not by default support interworking of C and C++ error handling.)
+ Reverted changes to call png_longjmp in contrib/gregbook where it is not
+ appropriate. If mainprog->jmpbuf is used by setjmp, then png_longjmp
+ cannot be used.
Changed "extern PNG_EXPORT" to "PNG_EXPORT" in png.h (Jan Nijtmans)
Changed "extern" to "PNG_EXTERN" in pngpriv.h (except for the 'extern "C" {')
- Put "#ifndef PNG_EXTERN, #endif" around "#define PNG_EXTERN" in pngpriv.h
-version 1.4.4beta02 [July 24, 2010]
+Version 1.5.0beta34 [July 12, 2010]
+ Put #ifndef PNG_EXTERN, #endif around the define PNG_EXTERN in pngpriv.h
+
+Version 1.5.0beta35 [July 24, 2010]
+ Removed some newly-added TAB characters.
Added -DNO_PNG_SNPRINTF to CFLAGS in scripts/makefile.dj2
Moved the definition of png_snprintf() outside of the enclosing
#ifdef blocks in pngconf.h
- Added a special case typedef of png_longjmp_ptr for WATCOM.
-
-version 1.4.4beta03 [July 24, 2010]
- Removed reference to cbuilder5/* from Makefile.in and Makefile.am
- Eliminated the new special case typedef of png_longjmp_ptr for WATCOM
- and made a special case "#define PNGAPI" in pngconf.h instead.
-version 1.4.4beta04 [July 31, 2010]
- Updated the read macros and functions from 1.5.0beta38.
-
-version 1.4.4beta05 [August 6, 2010]
- Updated projects/visualc71 so it can find scripts/pnglibconf.h
- Removed unused png_mem_* defines from pngconf.h.
+Version 1.5.0beta36 [July 29, 2010]
+ Patches by John Bowler:
+ Fixed point APIs are now supported throughout (no missing APIs).
+ Internal fixed point arithmetic support exists for all internal floating
+ point operations.
+ sCAL validates the floating point strings it is passed.
+ Safe, albeit rudimentary, Watcom support is provided by PNG_API_RULE==2
+ Two new APIs exist to get the number of passes without turning on the
+ PNG_INTERLACE transform and to get the number of rows in the current
+ pass.
+ A new test program, pngvalid.c, validates the gamma code.
+ Errors in the 16 bit gamma correction (overflows) have been corrected.
+ cHRM chunk testing is done consistently (previously the floating point
+ API bypassed it, because the test really didn't work on FP, now the test
+ is performed on the actual values to be stored in the PNG file so it
+ works in the FP case too.)
+ Most floating point APIs now simply call the fixed point APIs after
+ converting the values to the fixed point form used in the PNG file.
+ The standard headers no longer include zlib.h, which is currently only
+ required for pngstruct.h and can therefore be internal.
+ Revised png_get_int_32 to undo the PNG two's complement representation of
+ negative numbers.
+
+Version 1.5.0beta37 [July 30, 2010]
+ Added a typecast in png_get_int_32() in png.h and pngrutil.h to avoid
+ a compiler warning.
+ Replaced oFFs 0,0 with oFFs -10,20 in pngtest.png
+
+Version 1.5.0beta38 [July 31, 2010]
+ Implemented remaining "_fixed" functions.
+ Corrected a number of recently introduced warnings mostly resulting from
+ safe but uncast assignments to shorter integers. Also added a zlib
+ VStudio release library project because the latest zlib Official Windows
+ build does not include such a thing.
+ Revised png_get_int_16() to be similar to png_get_int_32().
+ Restored projects/visualc71.
+
+Version 1.5.0beta39 [August 2, 2010]
+ VisualC/GCC warning fixes, VisualC build fixes
+ The changes include support for function attributes in VC in addition to
+ those already present in GCC - necessary because without these some
+ warnings are unavoidable. Fixes include signed/unsigned fixes in
+ pngvalid and checks with gcc -Wall -Wextra -Wunused.
+ VC requires function attributes on function definitions as well as
+ declarations, PNG_FUNCTION has been added to enable this and the
+ relevant function definitions changed.
+
+Version 1.5.0beta40 [August 6, 2010]
Correct use of _WINDOWS_ in pngconf.h
+ Removed png_mem_ #defines; they are no longer used.
+ Added the sRGB chunk to pngtest.png
-version 1.4.4beta06 [August 11, 2010]
+Version 1.5.0beta41 [August 11, 2010]
+ Added the cHRM chunk to pngtest.png
Don't try to use version-script with cygwin/mingw.
Revised contrib/gregbook to work under cygwin/mingw.
-version 1.4.4beta07 [August 26, 2010]
- Updated prebuilt aclocal.m4 and ltmain.sh
+Version 1.5.0beta42 [August 18, 2010]
Add .dll.a to the list of extensions to be symlinked by Makefile.am (Yaakov)
+ Made all API functions that have const arguments and constant string
+ literal pointers declare them (John Bowler).
+
+Version 1.5.0beta43 [August 20, 2010]
+ Removed spurious tabs, shorten long lines (no source change)
+ Also added scripts/chkfmt to validate the format of all the files that can
+ reasonably be validated (it is suggested to run "make distclean" before
+ checking, because some machine generated files have long lines.)
+ Reformatted the CHANGES file to be more consistent throughout.
+ Made changes to address various issues identified by GCC, mostly
+ signed/unsigned and shortening problems on assignment but also a few
+ difficult to optimize (for GCC) loops.
+ Fixed non-GCC fixed point builds. In png.c a declaration was misplaced
+ in an earlier update. Fixed to declare the auto variables at the head.
+ Use cexcept.h in pngvalid.c.
+
+Version 1.5.0beta44 [August 24, 2010]
Updated CMakeLists.txt to use CMAKE_INSTALL_LIBDIR variable; useful for
installing libpng in /usr/lib64 (Funda Wang).
Revised CMakeLists.txt to put the man pages in share/man/man* not man/man*
Revised CMakeLists.txt to make symlinks instead of copies when installing.
Changed PNG_LIB_NAME from pngNN to libpngNN in CMakeLists.txt (Philip Lowman)
- Moved "#include pngusr.h" ahead of PNG_USER_PRIVATEBUILD test in pngconf.h
- Eliminated a deprecated reference to png_ptr->io_ptr in pngtest.c
- Eliminated new unnecessary #if tests regarding the sCAL chunk from pngrutil.c
+ Implemented memory checks within pngvalid
+ Reformatted/rearranged pngvalid.c to assist use of progressive reader.
+ Check interlaced images in pngvalid
+ Clarified pngusr.h comments in pnglibconf.dfa
+ Simplified the pngvalid error-handling code now that cexcept.h is in place.
+ Implemented progressive reader in pngvalid.c for standard tests
+ Implemented progressive read in pngvalid.c gamma tests
+ Turn on progressive reader in pngvalid.c by default and tidy code.
+
+Version 1.5.0beta45 [August 26, 2010]
+ Added an explicit make step to projects/vstudio for pnglibconf.h
+ Also corrected zlib.vcxproj into which Visual Studio had introduced
+ what it calls an "authoring error". The change to make pnglibconf.h
+ simply copies the file; in the future it may actually generate the
+ file from scripts/pnglibconf.dfa as the other build systems do.
+ Changed pngvalid to work when floating point APIs are disabled
+ Renamed the prebuilt scripts/pnglibconf.h to scripts/pnglibconf.h.prebuilt
+ Supply default values for PNG_USER_PRIVATEBUILD and PNG_USER_DLLFNAME_POSTFIX
+ in pngpriv.h in case the user neglected to define them in their pngusr.h
+
+Version 1.5.0beta46 [August 28, 2010]
+ Added new private header files to libpng_sources in CMakeLists.txt
+ Added PNG_READ_16BIT, PNG_WRITE_16BIT, and PNG_16BIT options.
+ Added reference to scripts/pnglibconf.h.prebuilt in the visualc71 project.
+
+Version 1.5.0beta47 [September 11, 2010]
+ Fixed a number of problems with 64-bit compilation reported by Visual
+ Studio 2010 (John Bowler).
+
+Version 1.5.0beta48 [October 4, 2010]
+ Updated CMakeLists.txt (Philip Lowman).
+ Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER,
+ $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE
+ Fixed problem with symbols creation in Makefile.am which was assuming that
+ all versions of ccp write to standard output by default (Martin Banky). The
+ bug was introduced in libpng-1.2.9beta5.
+ Removed unused mkinstalldirs.
+
+Version 1.5.0beta49 [October 8, 2010]
+ Undid Makefile.am revision of 1.5.0beta48.
+
+Version 1.5.0beta50 [October 14, 2010]
+ Revised Makefile.in to account for mkinstalldirs being removed.
+ Added some "(unsigned long)" typecasts in printf statements in pngvalid.c.
+ Suppressed a compiler warning in png_handle_sPLT().
+ Check for out-of-range text compression mode in png_set_text().
+
+Version 1.5.0beta51 [October 15, 2010]
+ Changed embedded dates to "(PENDING RELEASE) in beta releases (and future
+ rc releases) to minimize the difference between releases.
+
+Version 1.5.0beta52 [October 16, 2010]
+ Restored some of the embedded dates (in png.h, png.c, documentation, etc.)
+
+Version 1.5.0beta53 [October 18, 2010]
+ Updated INSTALL to mention using "make maintainer-clean" and to remove
+ obsolete statement about a custom ltmain.sh
+ Disabled "color-tests" by default in Makefile.am so it will work with
+ automake versions earlier than 1.11.1
+ Use document name "libpng-manual.txt" instead of "libpng-<version>.txt"
+ to simplify version differences.
+ Removed obsolete remarks about setjmp handling from INSTALL.
+ Revised and renamed the typedef in png.h and png.c that was designed
+ to catch library and header mismatch.
+
+Version 1.5.0beta54 [November 10, 2010]
+ Require 48 bytes, not 64 bytes, for big_row_buf in overflow checks.
+ Used a consistent structure for the pngget.c functions.
+
+Version 1.5.0beta55 [November 21, 2010]
+ Revised png_get_uint_32, png_get_int_32, png_get_uint_16 (Cosmin)
+ Moved reading of file signature into png_read_sig (Cosmin)
+ Fixed atomicity of chunk header serialization (Cosmin)
+ Added test for io_state in pngtest.c (Cosmin)
+ Added "#!/bin/sh" at the top of contrib/pngminim/*/gather.sh scripts.
+ Changes to remove gcc warnings (John Bowler)
+ Certain optional gcc warning flags resulted in warnings in libpng code.
+ With these changes only -Wconversion and -Wcast-qual cannot be turned on.
+ Changes are trivial rearrangements of code. -Wconversion is not possible
+ for pngrutil.c (because of the widespread use of += et al on variables
+ smaller than (int) or (unsigned int)) and -Wcast-qual is not possible
+ with pngwio.c and pngwutil.c because the 'write' callback and zlib
+ compression both fail to declare their input buffers with 'const'.
+
+Version 1.5.0beta56 [December 7, 2010]
+ Added the private PNG_UNUSED() macro definition in pngpriv.h.
+ Added some commentary about PNG_EXPORT in png.h and pngconf.h
+ Revised PNG_EXPORT() macro and added PNG_EXPORTA() macro, with the
+ objective of simplifying and improving the cosmetic appearance of png.h.
+ Fixed some incorrect "=" macro names in pnglibconf.dfa
+ Included documentation of changes in 1.5.0 from 1.4.x in libpng-manual.txt
+
+Version 1.5.0beta57 [December 9, 2010]
+ Documented the pngvalid gamma error summary with additional comments and
+ print statements.
+ Improved missing symbol handling in checksym.awk; symbols missing in both
+ the old and new files can now be optionally ignored, treated as errors
+ or warnings.
+ Removed references to pngvcrd.c and pnggccrd.c from the vstudio project.
+ Updated "libpng14" to "libpng15" in the visualc71 project.
+ Enabled the strip16 tests in pngvalid.`
+ Don't display test results (except PASS/FAIL) when running "make test".
+ Instead put them in pngtest-log.txt
+ Added "--with-zprefix=<string>" to configure.ac
+ Updated the prebuilt configuration files to autoconf version 2.68
+
+Version 1.5.0beta58 [December 19, 2010]
+ Fixed interlace image handling and add test cases (John Bowler)
+ Fixed the clean rule in Makefile.am to remove pngtest-log.txt
+ Made minor changes to work around warnings in gcc 3.4
+
+Version 1.5.0rc01 [December 27, 2010]
+ No changes.
-version 1.4.4beta08 [September 2, 2010]
- Updated the xcode project to work with libpng-1.4.x and added iOS targets
- for simulator and device (Philippe Hausler).
+Version 1.5.0rc02 [December 27, 2010]
+ Eliminated references to the scripts/*.def files in project/visualc71.
-version 1.4.4rc01 [September 10, 2010]
- No changes.
+Version 1.5.0rc03 [December 28, 2010]
+ Eliminated scripts/*.def and revised Makefile.am accordingly
-version 1.4.4rc02 [September 13, 2010]
- Revised CMakeLists.txt (Philip Lowman).
+Version 1.5.0rc04 [December 29, 2010]
+ Fixed bug in background transformation handling in pngrtran.c (it was
+ looking for the flag in png_ptr->transformations instead of in
+ png_ptr->flags) (David Raymond).
-version 1.4.4rc03 [September 14, 2010]
- Removed an extraneous close-double-quote from CMakeLists.txt
- Eliminated another deprecated reference to png_ptr->io_ptr in pngtest.c
+Version 1.5.0rc05 [December 31, 2010]
+ Fixed typo in a comment in CMakeLists.txt (libpng14 => libpng15) (Cosmin)
-version 1.4.4rc04 [September 16, 2010]
- Fixed indentation and removed debugging message from CMakeLists.txt
- Revised autogen.sh to recognize and use $AUTOCONF, $AUTOMAKE, $AUTOHEADER,
- $AUTOPOINT, $ACLOCAL and $LIBTOOLIZE
+Version 1.5.0rc06 [January 4, 2011]
+ Changed the new configure option "zprefix=string" to "zlib-prefix=string"
+
+Version 1.5.0rc07 [January 4, 2011]
+ Updated copyright year.
+
+Version 1.5.0 [January 6, 2011]
+ No changes.
+
+version 1.5.1beta01 [January 8, 2011]
+ Added description of png_set_crc_action() to the manual.
+ Added a note in the manual that the type of the iCCP profile was changed
+ from png_charpp to png_bytepp in png_get_iCCP(). This change happened
+ in version 1.5.0beta36 but is not noted in the CHANGES. Similarly,
+ it was changed from png_charpp to png_const_bytepp in png_set_iCCP().
+ Ensure that png_rgb_to_gray ignores palette mapped images, if libpng
+ internally happens to call it with one.
+ Fixed a failure to handle palette mapped images correctly.
+
+Version 1.5.1beta02 [January 14, 2011]
+ Fixed a bug in handling of interlaced images (bero at arklinux.org).
+ Updated CMakeLists.txt (Clifford Yapp)
+
+Version 1.5.1beta03 [January 14, 2011]
+ Fixed typecasting of some png_debug() statements (Cosmin)
+
+Version 1.5.1beta04 [January 16, 2011]
+ Updated documentation of png_set|get_tRNS() (Thomas Klausner).
+ Mentioned in the documentation that applications must #include "zlib.h"
+ if they need access to anything in zlib.h, and that a number of
+ macros such as png_memset() are no longer accessible by applications.
+ Corrected pngvalid gamma test "sample" function to access all of the color
+ samples of each pixel, instead of sampling the red channel three times.
+ Prefixed variable names index, div, exp, gamma with "png_" to avoid "shadow"
+ warnings, and (mistakenly) changed png_exp() to exp().
+
+Version 1.5.1beta05 [January 16, 2011]
+ Changed variable names png_index, png_div, png_exp, and png_gamma to
+ char_index, divisor, exp_b10, and gamma_val, respectively, and
+ changed exp() back to png_exp().
+
+Version 1.5.1beta06 [January 20, 2011]
+ Prevent png_push_crc_skip() from hanging while reading an unknown chunk
+ or an over-large compressed zTXt chunk with the progressive reader.
+ Eliminated more GCC "shadow" warnings.
+ Revised png_fixed() in png.c to avoid compiler warning about reaching the
+ end without returning anything.
+
+Version 1.5.1beta07 [January 22, 2011]
+ In the manual, describe the png_get_IHDR() arguments in the correct order.
+ Added const_png_structp and const_png_infop types, and used them in
+ prototypes for most png_get_*() functions.
+
+Version 1.5.1beta08 [January 23, 2011]
+ Added png_get_io_chunk_type() and deprecated png_get_io_chunk_name()
+ Added synopses for the IO_STATE functions and other missing synopses
+ to the manual. Removed the synopses from libpngpf.3 because they
+ were out of date and no longer useful. Better information can be
+ obtained by reading the prototypes and comments in pngpriv.h
+ Attempted to fix cpp on Solaris with S. Studio 12 cc, fix build
+ Added a make macro DFNCPP that is a CPP that will accept the tokens in
+ a .dfn file and adds configure stuff to test for such a CPP. ./configure
+ should fail if one is not available.
+ Corrected const_png_ in png.h to png_const_ to avoid polluting the namespace.
+ Added png_get_current_row_number and png_get_current_pass_number for the
+ benefit of the user transform callback.
+ Added png_process_data_pause and png_process_data_skip for the benefit of
+ progressive readers that need to stop data processing or want to optimize
+ skipping of unread data (e.g., if the reader marks a chunk to be skipped.)
+
+Version 1.5.1beta09 [January 24, 2011]
+ Enhanced pngvalid, corrected an error in gray_to_rgb, corrected doc error.
+ pngvalid contains tests of transforms, which tests are currently disabled
+ because they are incompletely tested. gray_to_rgb was failing to expand
+ the bit depth for smaller bit depth images; this seems to be a long
+ standing error and resulted, apparently, in invalid output. The
+ documentation did not accurately describe what libpng really does when
+ converting RGB to gray.
+
+Version 1.5.1beta10 [January 27, 2010]
+ Fixed incorrect examples of callback prototypes in the manual, that were
+ introduced in libpng-1.0.0.
+ In addition the order of the png_get_uint macros with respect to the
+ relevant function definitions has been reversed. This helps the
+ preprocessing of the symbol files be more robust. Furthermore, the
+ symbol file preprocessing now uses -DPNG_NO_USE_READ_MACROS even when
+ the library may actually be built with PNG_USE_READ_MACROS; this stops
+ the read macros interfering with the symbol file format.
+ Made the manual, synopses, and function prototypes use the function
+ argument names file_gamma, int_file_gamma, and srgb_intent consistently.
+
+Version 1.5.1beta11 [January 28, 2011]
+ Changed PNG_UNUSED from "param=param;" to "{if(param){}}".
+ Corrected local variable type in new API png_process_data_skip()
+ The type was self-evidently incorrect but only causes problems on 64 bit
+ architectures.
+ Added transform tests to pngvalid and simplified the arguments.
+
+Version 1.5.1rc01 [January 29, 2011]
+ No changes.
-version 1.4.4rc05 [September 20, 2010]
- Rebuilt configure scripts with automake-1.11.1 instead of automake-1.11.
- Removed unused mkinstalldirs file.
+Version 1.5.1rc02 [January 31, 2011]
+ Added a request in the manual that applications do not use "png_" or
+ "PNG_" to begin any of their own symbols.
+ Changed PNG_UNUSED to "(void)param;" and updated the commentary in pngpriv.h
-version 1.4.4 [September 23, 2010]
+Version 1.5.1 [February 3, 2011]
No changes.
-Send comments/corrections/commendations to glennrp at users.sourceforge.net
-or to png-mng-implement at lists.sf.net (subscription required; visit
-https://lists.sourceforge.net/lists/listinfo/png-mng-implement).
+Version 1.5.2beta01 [February 13, 2011]
+ More -Wshadow fixes for older gcc compilers. Older gcc versions apparently
+ check formal parameters names in function declarations (as well as
+ definitions) to see if they match a name in the global namespace.
+ Revised PNG_EXPORTA macro to not use an empty parameter, to accommodate the
+ old VisualC++ preprocessor.
+ Turned on interlace handling in png_read_png().
+ Fixed gcc pendantic warnings.
+ Handle longjmp in Cygwin.
+ Fixed png_get_current_row_number() in the interlaced case.
+ Cleaned up ALPHA flags and transformations.
+ Implemented expansion to 16 bits.
+
+Version 1.5.2beta02 [February 19, 2011]
+ Fixed mistake in the descriptions of user read_transform and write_transform
+ function prototypes in the manual. The row_info struct is png_row_infop.
+ Reverted png_get_current_row_number() to previous (1.5.2beta01) behavior.
+ Corrected png_get_current_row_number documentation
+ Fixed the read/write row callback documentation.
+ This documents the current behavior, where the callback is called after
+ every row with information pertaining to the next row.
+
+Version 1.5.2beta03 [March 3, 2011]
+ Fixed scripts/makefile.vcwin32
+ Updated contrib/pngsuite/README to add the word "modify".
+ Define PNG_ALLOCATED to blank when _MSC_VER<1300.
+
+Version 1.5.2rc01 [March 19, 2011]
+ Define remaining attributes to blank when MSC_VER<1300.
+ ifdef out mask arrays in pngread.c when interlacing is not supported.
+
+Version 1.5.2rc02 [March 22, 2011]
+ Added a hint to try CPP=/bin/cpp if "cpp -E" fails in scripts/pnglibconf.mak
+ and in contrib/pngminim/*/makefile, eg., on SunOS 5.10, and removed "strip"
+ from the makefiles.
+ Fixed a bug (present since libpng-1.0.7) that makes png_handle_sPLT() fail
+ to compile when PNG_NO_POINTER_INDEXING is defined (Chubanov Kirill)
+
+Version 1.5.2rc03 [March 24, 2011]
+ Don't include standard header files in png.h while building the symbol table,
+ to avoid cpp failure on SunOS (introduced PNG_BUILDING_SYMBOL_TABLE macro).
+
+Version 1.5.2 [March 31, 2011]
+
+Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+(subscription required; visit
+https://lists.sourceforge.net/lists/listinfo/png-mng-implement
+to subscribe)
+or to glennrp at users.sourceforge.net
Glenn R-P
*/ }
This code is released under the libpng license.
-libpng versions 1.2.6, August 15, 2004, through 1.4.4, September 23, 2010, are
-Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are
+libpng versions 1.2.6, August 15, 2004, through 1.5.2, March 31, 2011, are
+Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
-September 23, 2010
+March 31, 2011
-README for libpng version 1.4.4 - September 23, 2010 (shared library 14.0)
+README for libpng version 1.5.2 - March 31, 2011 (shared library 15.0)
See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng.
privately to Guy, Andreas, or Glenn. They will forward any good
suggestions to the list.
-For a detailed description on using libpng, read libpng.txt. For
+For a detailed description on using libpng, read libpng-manual.txt. For
examples of libpng in a program, see example.c and pngtest.c. For usage
information and restrictions (what little they are) on libpng, see
png.h. For a description on using zlib (the compression library used by
TODO => Things not implemented in the current library
Y2KINFO => Statement of Y2K compliance
example.c => Example code for using libpng functions
- libpng.3 => manual page for libpng (includes libpng.txt)
- libpng.txt => Description of libpng and its functions
+ libpng.3 => manual page for libpng (includes libpng-manual.txt)
+ libpng-manual.txt => Description of libpng and its functions
libpngpf.3 => manual page for libpng's private functions
png.5 => manual page for the PNG format
png.c => Basic interface functions common to library
- png.h => Library function and interface declarations
- pngconf.h => System specific library configuration
+ png.h => Library function and interface declarations (public)
+ pngpriv.h => Library function and interface declarations (private)
+ pngconf.h => System specific library configuration (public)
+ pngstruct.h => png_struct declaration (private)
+ pnginfo.h => png_info struct declaration (private)
+ pngdebug.h => debugging macros (private)
pngerror.c => Error/warning message I/O functions
pngget.c => Functions for retrieving info from struct
pngmem.c => Memory handling functions
visupng => Contains a MSVC workspace for VisualPng
projects => Contains project files and workspaces for
building a DLL
- c5builder => Contains a Borland workspace for building
+ cbuilder5 => Contains a Borland workspace for building
libpng and zlib
visualc6 => Contains a Microsoft Visual C++ (MSVC)
workspace for building libpng and zlib
+ visualc71 => Contains a Microsoft Visual C++ (MSVC)
+ workspace for building libpng and zlib
+ xcode => Contains an Apple xcode
+ workspace for building libpng and zlib
scripts => Directory containing scripts for building libpng:
- descrip.mms => VMS makefile for MMS or MMK
- makefile.std => Generic UNIX makefile (cc, creates static
- libpng.a)
- makefile.elf => Linux/ELF makefile symbol versioning,
- (gcc, creates libpng14.so.14.1.4.4)
- makefile.linux => Linux/ELF makefile
- (gcc, creates libpng14.so.14.1.4.4)
- makefile.gcc => Generic makefile (gcc, creates static libpng.a)
- makefile.knr => Archaic UNIX Makefile that converts files with
- ansi2knr (Requires ansi2knr.c from
- ftp://ftp.cs.wisc.edu/ghost)
- makefile.aix => AIX makefile
- makefile.cygwin => Cygwin/gcc makefile
- makefile.darwin => Darwin makefile
- makefile.dec => DEC Alpha UNIX makefile
- makefile.freebsd => FreeBSD makefile
- makefile.hpgcc => HPUX makefile using gcc
- makefile.hpux => HPUX (10.20 and 11.00) makefile
- makefile.hp64 => HPUX (10.20 and 11.00) makefile, 64 bit
- makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static)
- makefile.intel => Intel C/C++ version 4.0 and later
- makefile.mingw => Mingw/gcc makefile
- makefile.netbsd => NetBSD/cc makefile, makes libpng.so.
- makefile.ne14bsd => NetBSD/cc makefile, makes
- libpng14.so
- makefile.openbsd => OpenBSD makefile
- makefile.sgi => Silicon Graphics IRIX (cc, creates static lib)
- makefile.sggcc => Silicon Graphics
- (gcc, creates libpng14.so.14.1.4.4)
- makefile.sunos => Sun makefile
- makefile.solaris => Solaris 2.X makefile
- (gcc, creates libpng14.so.14.1.4.4)
- makefile.so9 => Solaris 9 makefile
- (gcc, creates libpng14.so.14.1.4.4)
- makefile.32sunu => Sun Ultra 32-bit makefile
- makefile.64sunu => Sun Ultra 64-bit makefile
- makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
- makefile.mips => MIPS makefile
- makefile.acorn => Acorn makefile
- makefile.amiga => Amiga makefile
- smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC
- compiler (Requires SCOPTIONS, copied from
- scripts/SCOPTIONS.ppc)
- makefile.atari => Atari makefile
- makefile.beos => BEOS makefile for X86
- makefile.bor => Borland makefile (uses bcc)
- makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode)
- makefile.tc3 => Turbo C 3.0 makefile
- makefile.dj2 => DJGPP 2 makefile
- makefile.msc => Microsoft C makefile
- makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and
- later (does not use assembler code)
- makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def)
- png32ce.def => module definition for makefile.cegccg
- pngos2.def => OS/2 module definition file used by
- makefile.os2
- pngwin.def => module definition file used by
- makefile.cygwin and makefile.mingw
- makefile.watcom => Watcom 10a+ Makefile, 32-bit flat memory model
- makevms.com => VMS build script
- SCOPTIONS.ppc => Used with smakefile.ppc
+ (see scripts/README.txt for the list of scripts)
Good luck, and happy coding.
TODO - list of things to do for libpng:
Final bug fixes.
-Improve API by hiding the png_struct and png_info structs.
-Finish work on the no-floating-point version (including gamma compensation)
Better C++ wrapper/full C++ implementation?
Fix problem with C++ and EXTERN "C".
cHRM transformation.
-Improve setjmp/longjmp usage or remove it in favor of returning error codes.
+Remove setjmp/longjmp usage in favor of returning error codes.
Add "grayscale->palette" transformation and "palette->grayscale" detection.
-Improved quantizing and dithering.
+Improved dithering.
Multi-lingual error and warning message support.
Complete sRGB transformation (presently it simply uses gamma=0.45455).
Man pages for function calls.
(counting huffman bits/precompression? filter inertia? filter costs?).
Histogram creation.
Text conversion between different code pages (Latin-1 -> Mac and DOS).
-Build gamma tables using fixed point (and do away with floating point entirely).
Avoid building gamma tables whenever possible.
Use greater precision when changing to linear gamma for compositing against
background and doing rgb-to-gray transformation.
Investigate pre-incremented loop counters and other loop constructions.
Add interpolated method of handling interlacing.
-Provide for conditional compilation of 16-bit support (except for the
- initial stripping down to 8-bits when reading a 16-bit PNG datastream).
Switch to the simpler zlib (zlib/libpng) license if legally possible.
+Extend pngvalid.c to validate more of the libpng transformations.
*/
/* png.c - location for general purpose libpng functions
*
- * Last changed in libpng 1.4.2 [May 6, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* and license in png.h
*/
-#define PNG_NO_EXTERN
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
#include "pngpriv.h"
/* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_4_4 Your_png_h_is_not_version_1_4_4;
-
-/* Version information for C files. This had better match the version
- * string defined in png.h.
- */
+typedef png_libpng_version_1_5_2 Your_png_h_is_not_version_1_5_2;
/* Tells libpng that we have already handled the first "num_bytes" bytes
* of the PNG file signature. If the PNG data is embedded into another
* PNG signature (this is the same behaviour as strcmp, memcmp, etc).
*/
int PNGAPI
-png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
+png_sig_cmp(png_const_bytep sig, png_size_t start, png_size_t num_to_check)
{
png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+
if (num_to_check > 8)
num_to_check = 8;
+
else if (num_to_check < 1)
return (-1);
#endif /* PNG_READ_SUPPORTED */
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-/* Function to allocate memory for zlib and clear it to 0. */
-voidpf /* PRIVATE */
-png_zalloc(voidpf png_ptr, uInt items, uInt size)
+/* Function to allocate memory for zlib */
+PNG_FUNCTION(voidpf /* PRIVATE */,
+png_zalloc,(voidpf png_ptr, uInt items, uInt size),PNG_ALLOCATED)
{
png_voidp ptr;
png_structp p=(png_structp)png_ptr;
if (png_ptr == NULL)
return (NULL);
+
if (items > PNG_UINT_32_MAX/size)
{
png_warning (p, "Potential overflow in png_zalloc()");
* trouble of calculating it.
*/
void /* PRIVATE */
-png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length)
+png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length)
{
int need_crc = 1;
(PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
need_crc = 0;
}
+
else /* critical */
{
if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
* and png_info_init() so that applications that want to use a shared
* libpng don't have to be recompiled if png_info changes size.
*/
-png_infop PNGAPI
-png_create_info_struct(png_structp png_ptr)
+PNG_FUNCTION(png_infop,PNGAPI
+png_create_info_struct,(png_structp png_ptr),PNG_ALLOCATED)
{
png_infop info_ptr;
if (freer == PNG_DESTROY_WILL_FREE_DATA)
info_ptr->free_me |= mask;
+
else if (freer == PNG_USER_WILL_FREE_DATA)
info_ptr->free_me &= ~mask;
+
else
png_warning(png_ptr,
"Unknown freer parameter in png_data_freer");
info_ptr->text[num].key = NULL;
}
}
+
else
{
int i;
info_ptr->splt_palettes[num].entries = NULL;
}
}
+
else
{
if (info_ptr->splt_palettes_num)
info_ptr->unknown_chunks[num].data = NULL;
}
}
+
else
{
int i;
if (info_ptr->unknown_chunks_num)
{
- for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
+ for (i = 0; i < info_ptr->unknown_chunks_num; i++)
png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
png_free(png_ptr, info_ptr->unknown_chunks);
}
#endif
- if (num == -1)
- info_ptr->free_me &= ~mask;
- else
- info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL);
+ if (num != -1)
+ mask &= ~PNG_FREE_MUL;
+
+ info_ptr->free_me &= ~mask;
}
/* This is an internal routine to free any memory that the info struct is
{
if (png_ptr == NULL)
return (NULL);
+
return (png_ptr->io_ptr);
}
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-#ifdef PNG_STDIO_SUPPORTED
+# ifdef PNG_STDIO_SUPPORTED
/* Initialize the default input/output functions for the PNG file. If you
* use your own read or write routines, you can call either png_set_read_fn()
* or png_set_write_fn() instead of png_init_io(). If you have defined
png_ptr->io_ptr = (png_voidp)fp;
}
-#endif
+# endif
-#ifdef PNG_TIME_RFC1123_SUPPORTED
+# ifdef PNG_TIME_RFC1123_SUPPORTED
/* Convert the supplied time into an RFC 1123 string suitable for use in
* a "Creation Time" or other text-based time string.
*/
-png_charp PNGAPI
-png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
+png_const_charp PNGAPI
+png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime)
{
static PNG_CONST char short_months[12][4] =
{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
if (png_ptr == NULL)
return (NULL);
+
if (png_ptr->time_buffer == NULL)
{
png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
png_sizeof(char)));
}
-#ifdef USE_FAR_KEYWORD
+# ifdef USE_FAR_KEYWORD
{
char near_time_buf[29];
png_snprintf6(near_time_buf, 29, "%d %s %d %02d:%02d:%02d +0000",
png_memcpy(png_ptr->time_buffer, near_time_buf,
29*png_sizeof(char));
}
-#else
+# else
png_snprintf6(png_ptr->time_buffer, 29, "%d %s %d %02d:%02d:%02d +0000",
ptime->day % 32, short_months[(ptime->month - 1) % 12],
ptime->year, ptime->hour % 24, ptime->minute % 60,
ptime->second % 61);
-#endif
- return ((png_charp)png_ptr->time_buffer);
+# endif
+ return png_ptr->time_buffer;
}
-#endif /* PNG_TIME_RFC1123_SUPPORTED */
+# endif /* PNG_TIME_RFC1123_SUPPORTED */
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
-png_charp PNGAPI
-png_get_copyright(png_structp png_ptr)
+png_const_charp PNGAPI
+png_get_copyright(png_const_structp png_ptr)
{
- png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */
+ PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */
#ifdef PNG_STRING_COPYRIGHT
- return PNG_STRING_COPYRIGHT
+ return PNG_STRING_COPYRIGHT
#else
-#ifdef __STDC__
- return ((png_charp) PNG_STRING_NEWLINE \
- "libpng version 1.4.4 - September 23, 2010" PNG_STRING_NEWLINE \
- "Copyright (c) 1998-2010 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
+# ifdef __STDC__
+ return PNG_STRING_NEWLINE \
+ "libpng version 1.5.2 - March 31, 2011" PNG_STRING_NEWLINE \
+ "Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
- PNG_STRING_NEWLINE);
-#else
- return ((png_charp) "libpng version 1.4.4 - September 23, 2010\
- Copyright (c) 1998-2010 Glenn Randers-Pehrson\
+ PNG_STRING_NEWLINE;
+# else
+ return "libpng version 1.5.2 - March 31, 2011\
+ Copyright (c) 1998-2011 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
- Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");
-#endif
+ Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
+# endif
#endif
}
* png_get_header_ver(). Due to the version_nn_nn_nn typedef guard,
* it is guaranteed that png.c uses the correct version of png.h.
*/
-png_charp PNGAPI
-png_get_libpng_ver(png_structp png_ptr)
+png_const_charp PNGAPI
+png_get_libpng_ver(png_const_structp png_ptr)
{
/* Version of *.c files used when building libpng */
- png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */
- return ((png_charp) PNG_LIBPNG_VER_STRING);
+ return png_get_header_ver(png_ptr);
}
-png_charp PNGAPI
-png_get_header_ver(png_structp png_ptr)
+png_const_charp PNGAPI
+png_get_header_ver(png_const_structp png_ptr)
{
/* Version of *.h files used when building libpng */
- png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */
- return ((png_charp) PNG_LIBPNG_VER_STRING);
+ PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */
+ return PNG_LIBPNG_VER_STRING;
}
-png_charp PNGAPI
-png_get_header_version(png_structp png_ptr)
+png_const_charp PNGAPI
+png_get_header_version(png_const_structp png_ptr)
{
/* Returns longer string containing both version and date */
- png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */
+ PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */
#ifdef __STDC__
- return ((png_charp) PNG_HEADER_VERSION_STRING
-#ifndef PNG_READ_SUPPORTED
+ return PNG_HEADER_VERSION_STRING
+# ifndef PNG_READ_SUPPORTED
" (NO READ SUPPORT)"
-#endif
- PNG_STRING_NEWLINE);
+# endif
+ PNG_STRING_NEWLINE;
#else
- return ((png_charp) PNG_HEADER_VERSION_STRING);
+ return PNG_HEADER_VERSION_STRING;
#endif
}
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+# ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
int PNGAPI
-png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
+png_handle_as_unknown(png_structp png_ptr, png_const_bytep chunk_name)
{
/* Check chunk_name and return "keep" value if it's on the list, else 0 */
int i;
png_bytep p;
if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0)
return 0;
+
p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5;
for (i = png_ptr->num_chunk_list; i; i--, p -= 5)
if (!png_memcmp(chunk_name, p, 4))
return ((int)*(p + 4));
return 0;
}
-#endif
+# endif
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
#ifdef PNG_READ_SUPPORTED
{
if (png_ptr == NULL)
return Z_STREAM_ERROR;
+
return (inflateReset(&png_ptr->zstream));
}
#endif /* PNG_READ_SUPPORTED */
png_access_version_number(void)
{
/* Version of *.c files used when building libpng */
- return((png_uint_32) PNG_LIBPNG_VER);
+ return((png_uint_32)PNG_LIBPNG_VER);
}
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
-#ifdef PNG_SIZE_T
+# ifdef PNG_SIZE_T
/* Added at libpng version 1.2.6 */
PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size));
png_size_t PNGAPI
{
if (size > (png_size_t)-1)
PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */
+
return ((png_size_t)size);
}
-#endif /* PNG_SIZE_T */
+# endif /* PNG_SIZE_T */
/* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */
-#ifdef PNG_cHRM_SUPPORTED
-#ifdef PNG_CHECK_cHRM_SUPPORTED
-
-/*
- * Multiply two 32-bit numbers, V1 and V2, using 32-bit
- * arithmetic, to produce a 64 bit result in the HI/LO words.
- *
- * A B
- * x C D
- * ------
- * AD || BD
- * AC || CB || 0
- *
- * where A and B are the high and low 16-bit words of V1,
- * C and D are the 16-bit words of V2, AD is the product of
- * A and D, and X || Y is (X << 16) + Y.
-*/
-
-void /* PRIVATE */
-png_64bit_product (long v1, long v2, unsigned long *hi_product,
- unsigned long *lo_product)
-{
- int a, b, c, d;
- long lo, hi, x, y;
-
- a = (v1 >> 16) & 0xffff;
- b = v1 & 0xffff;
- c = (v2 >> 16) & 0xffff;
- d = v2 & 0xffff;
-
- lo = b * d; /* BD */
- x = a * d + c * b; /* AD + CB */
- y = ((lo >> 16) & 0xffff) + x;
-
- lo = (lo & 0xffff) | ((y & 0xffff) << 16);
- hi = (y >> 16) & 0xffff;
-
- hi += a * c; /* AC */
-
- *hi_product = (unsigned long)hi;
- *lo_product = (unsigned long)lo;
-}
+# ifdef PNG_CHECK_cHRM_SUPPORTED
int /* PRIVATE */
png_check_cHRM_fixed(png_structp png_ptr,
"Ignoring attempt to set negative chromaticity value");
ret = 0;
}
- if (white_x > (png_fixed_point) PNG_UINT_31_MAX ||
- white_y > (png_fixed_point) PNG_UINT_31_MAX ||
- red_x > (png_fixed_point) PNG_UINT_31_MAX ||
- red_y > (png_fixed_point) PNG_UINT_31_MAX ||
- green_x > (png_fixed_point) PNG_UINT_31_MAX ||
- green_y > (png_fixed_point) PNG_UINT_31_MAX ||
- blue_x > (png_fixed_point) PNG_UINT_31_MAX ||
- blue_y > (png_fixed_point) PNG_UINT_31_MAX )
+ if (white_x > (png_fixed_point)PNG_UINT_31_MAX ||
+ white_y > (png_fixed_point)PNG_UINT_31_MAX ||
+ red_x > (png_fixed_point)PNG_UINT_31_MAX ||
+ red_y > (png_fixed_point)PNG_UINT_31_MAX ||
+ green_x > (png_fixed_point)PNG_UINT_31_MAX ||
+ green_y > (png_fixed_point)PNG_UINT_31_MAX ||
+ blue_x > (png_fixed_point)PNG_UINT_31_MAX ||
+ blue_y > (png_fixed_point)PNG_UINT_31_MAX )
{
png_warning(png_ptr,
"Ignoring attempt to set chromaticity value exceeding 21474.83");
png_warning(png_ptr, "Invalid cHRM white point");
ret = 0;
}
+
if (red_x > 100000L - red_y)
{
png_warning(png_ptr, "Invalid cHRM red point");
ret = 0;
}
+
if (green_x > 100000L - green_y)
{
png_warning(png_ptr, "Invalid cHRM green point");
ret = 0;
}
+
if (blue_x > 100000L - blue_y)
{
png_warning(png_ptr, "Invalid cHRM blue point");
return ret;
}
-#endif /* PNG_CHECK_cHRM_SUPPORTED */
-#endif /* PNG_cHRM_SUPPORTED */
+# endif /* PNG_CHECK_cHRM_SUPPORTED */
void /* PRIVATE */
png_check_IHDR(png_structp png_ptr,
error = 1;
}
-#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+# ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (width > png_ptr->user_width_max || width > PNG_USER_WIDTH_MAX)
-#else
+
+# else
if (width > PNG_USER_WIDTH_MAX)
-#endif
+# endif
{
png_warning(png_ptr, "Image width exceeds user limit in IHDR");
error = 1;
}
-#ifdef PNG_SET_USER_LIMITS_SUPPORTED
+# ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (height > png_ptr->user_height_max || height > PNG_USER_HEIGHT_MAX)
-#else
+# else
if (height > PNG_USER_HEIGHT_MAX)
-#endif
+# endif
{
png_warning(png_ptr, "Image height exceeds user limit in IHDR");
error = 1;
error = 1;
}
- if ( height > PNG_UINT_31_MAX)
+ if (height > PNG_UINT_31_MAX)
{
png_warning(png_ptr, "Invalid image height in IHDR");
error = 1;
}
- if ( width > (PNG_UINT_32_MAX
+ if (width > (PNG_UINT_32_MAX
>> 3) /* 8-byte RGBA pixels */
- - 64 /* bigrowbuf hack */
+ - 48 /* bigrowbuf hack */
- 1 /* filter byte */
- 7*8 /* rounding of width to multiple of 8 pixels */
- 8) /* extra max_pixel_depth pad */
error = 1;
}
-#ifdef PNG_MNG_FEATURES_SUPPORTED
+# ifdef PNG_MNG_FEATURES_SUPPORTED
/* Accept filter_method 64 (intrapixel differencing) only if
* 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
* 2. Libpng did not read a PNG signature (this filter_method is only
if (filter_type != PNG_FILTER_TYPE_BASE)
{
if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
- (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
- ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) &&
- (color_type == PNG_COLOR_TYPE_RGB ||
- color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
+ (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
+ ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) &&
+ (color_type == PNG_COLOR_TYPE_RGB ||
+ color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
{
png_warning(png_ptr, "Unknown filter method in IHDR");
error = 1;
}
}
-#else
+# else
if (filter_type != PNG_FILTER_TYPE_BASE)
{
png_warning(png_ptr, "Unknown filter method in IHDR");
error = 1;
}
-#endif
+# endif
if (error == 1)
png_error(png_ptr, "Invalid IHDR data");
}
+
+#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED)
+/* ASCII to fp functions */
+/* Check an ASCII formated floating point value, see the more detailed
+ * comments in pngpriv.h
+ */
+/* The following is used internally to preserve the 'valid' flag */
+#define png_fp_add(state, flags) ((state) |= (flags))
+#define png_fp_set(state, value)\
+ ((state) = (value) | ((state) & PNG_FP_WAS_VALID))
+
+/* Internal type codes: bits above the base state! */
+#define PNG_FP_SIGN 0 /* [+-] */
+#define PNG_FP_DOT 4 /* . */
+#define PNG_FP_DIGIT 8 /* [0123456789] */
+#define PNG_FP_E 12 /* [Ee] */
+
+int /* PRIVATE */
+png_check_fp_number(png_const_charp string, png_size_t size, int *statep,
+ png_size_tp whereami)
+{
+ int state = *statep;
+ png_size_t i = *whereami;
+
+ while (i < size)
+ {
+ int type;
+ /* First find the type of the next character */
+ {
+ char ch = string[i];
+
+ if (ch >= 48 && ch <= 57)
+ type = PNG_FP_DIGIT;
+
+ else switch (ch)
+ {
+ case 43: case 45: type = PNG_FP_SIGN; break;
+ case 46: type = PNG_FP_DOT; break;
+ case 69: case 101: type = PNG_FP_E; break;
+ default: goto PNG_FP_End;
+ }
+ }
+
+ /* Now deal with this type according to the current
+ * state, the type is arranged to not overlap the
+ * bits of the PNG_FP_STATE.
+ */
+ switch ((state & PNG_FP_STATE) + type)
+ {
+ case PNG_FP_INTEGER + PNG_FP_SIGN:
+ if (state & PNG_FP_SAW_ANY)
+ goto PNG_FP_End; /* not a part of the number */
+
+ png_fp_add(state, PNG_FP_SAW_SIGN);
+ break;
+
+ case PNG_FP_INTEGER + PNG_FP_DOT:
+ /* Ok as trailer, ok as lead of fraction. */
+ if (state & PNG_FP_SAW_DOT) /* two dots */
+ goto PNG_FP_End;
+
+ else if (state & PNG_FP_SAW_DIGIT) /* trailing dot? */
+ png_fp_add(state, PNG_FP_SAW_DOT);
+
+ else
+ png_fp_set(state, PNG_FP_FRACTION | PNG_FP_SAW_DOT);
+
+ break;
+
+ case PNG_FP_INTEGER + PNG_FP_DIGIT:
+ if (state & PNG_FP_SAW_DOT) /* delayed fraction */
+ png_fp_set(state, PNG_FP_FRACTION | PNG_FP_SAW_DOT);
+
+ png_fp_add(state, PNG_FP_SAW_DIGIT + PNG_FP_WAS_VALID);
+
+ break;
+ case PNG_FP_INTEGER + PNG_FP_E:
+ if ((state & PNG_FP_SAW_DIGIT) == 0)
+ goto PNG_FP_End;
+
+ png_fp_set(state, PNG_FP_EXPONENT);
+
+ break;
+
+ /* case PNG_FP_FRACTION + PNG_FP_SIGN:
+ goto PNG_FP_End; ** no sign in exponent */
+
+ /* case PNG_FP_FRACTION + PNG_FP_DOT:
+ goto PNG_FP_End; ** Because SAW_DOT is always set */
+
+ case PNG_FP_FRACTION + PNG_FP_DIGIT:
+ png_fp_add(state, PNG_FP_SAW_DIGIT + PNG_FP_WAS_VALID);
+ break;
+
+ case PNG_FP_FRACTION + PNG_FP_E:
+ /* This is correct because the trailing '.' on an
+ * integer is handled above - so we can only get here
+ * with the sequence ".E" (with no preceding digits).
+ */
+ if ((state & PNG_FP_SAW_DIGIT) == 0)
+ goto PNG_FP_End;
+
+ png_fp_set(state, PNG_FP_EXPONENT);
+
+ break;
+
+ case PNG_FP_EXPONENT + PNG_FP_SIGN:
+ if (state & PNG_FP_SAW_ANY)
+ goto PNG_FP_End; /* not a part of the number */
+
+ png_fp_add(state, PNG_FP_SAW_SIGN);
+
+ break;
+
+ /* case PNG_FP_EXPONENT + PNG_FP_DOT:
+ goto PNG_FP_End; */
+
+ case PNG_FP_EXPONENT + PNG_FP_DIGIT:
+ png_fp_add(state, PNG_FP_SAW_DIGIT + PNG_FP_WAS_VALID);
+
+ break;
+
+ /* case PNG_FP_EXPONEXT + PNG_FP_E:
+ goto PNG_FP_End; */
+
+ default: goto PNG_FP_End; /* I.e. break 2 */
+ }
+
+ /* The character seems ok, continue. */
+ ++i;
+ }
+
+PNG_FP_End:
+ /* Here at the end, update the state and return the correct
+ * return code.
+ */
+ *statep = state;
+ *whereami = i;
+
+ return (state & PNG_FP_SAW_DIGIT) != 0;
+}
+
+
+/* The same but for a complete string. */
+int
+png_check_fp_string(png_const_charp string, png_size_t size)
+{
+ int state=0;
+ png_size_t char_index=0;
+
+ return png_check_fp_number(string, size, &state, &char_index) &&
+ (char_index == size || string[char_index] == 0);
+}
+#endif /* pCAL or sCAL */
+
+#ifdef PNG_READ_sCAL_SUPPORTED
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+/* Utility used below - a simple accurate power of ten from an integral
+ * exponent.
+ */
+static double
+png_pow10(int power)
+{
+ int recip = 0;
+ double d = 1;
+
+ /* Handle negative exponent with a reciprocal at the end because
+ * 10 is exact whereas .1 is inexact in base 2
+ */
+ if (power < 0)
+ {
+ if (power < DBL_MIN_10_EXP) return 0;
+ recip = 1, power = -power;
+ }
+
+ if (power > 0)
+ {
+ /* Decompose power bitwise. */
+ double mult = 10;
+ do
+ {
+ if (power & 1) d *= mult;
+ mult *= mult;
+ power >>= 1;
+ }
+ while (power > 0);
+
+ if (recip) d = 1/d;
+ }
+ /* else power is 0 and d is 1 */
+
+ return d;
+}
+
+/* Function to format a floating point value in ASCII with a given
+ * precision.
+ */
+void /* PRIVATE */
+png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
+ double fp, unsigned int precision)
+{
+ /* We use standard functions from math.h, but not printf because
+ * that would require stdio. The caller must supply a buffer of
+ * sufficient size or we will png_error. The tests on size and
+ * the space in ascii[] consumed are indicated below.
+ */
+ if (precision < 1)
+ precision = DBL_DIG;
+
+ /* Enforce the limit of the implementation precision too. */
+ if (precision > DBL_DIG+1)
+ precision = DBL_DIG+1;
+
+ /* Basic sanity checks */
+ if (size >= precision+5) /* See the requirements below. */
+ {
+ if (fp < 0)
+ {
+ fp = -fp;
+ *ascii++ = 45; /* '-' PLUS 1 TOTAL 1*/
+ --size;
+ }
+
+ if (fp >= DBL_MIN && fp <= DBL_MAX)
+ {
+ int exp_b10; /* A base 10 exponent */
+ double base; /* 10^exp_b10 */
+
+ /* First extract a base 10 exponent of the number,
+ * the calculation below rounds down when converting
+ * from base 2 to base 10 (multiply by log10(2) -
+ * 0.3010, but 77/256 is 0.3008, so exp_b10 needs to
+ * be increased. Note that the arithmetic shift
+ * performs a floor() unlike C arithmetic - using a
+ * C multiply would break the following for negative
+ * exponents.
+ */
+ (void)frexp(fp, &exp_b10); /* exponent to base 2 */
+
+ exp_b10 = (exp_b10 * 77) >> 8; /* <= exponent to base 10 */
+
+ /* Avoid underflow here. */
+ base = png_pow10(exp_b10); /* May underflow */
+
+ while (base < DBL_MIN || base < fp)
+ {
+ /* And this may overflow. */
+ double test = png_pow10(exp_b10+1);
+
+ if (test <= DBL_MAX)
+ ++exp_b10, base = test;
+
+ else
+ break;
+ }
+
+ /* Normalize fp and correct exp_b10, after this fp is in the
+ * range [.1,1) and exp_b10 is both the exponent and the digit
+ * *before* which the decimal point should be inserted
+ * (starting with 0 for the first digit). Note that this
+ * works even if 10^exp_b10 is out of range because of the
+ * test on DBL_MAX above.
+ */
+ fp /= base;
+ while (fp >= 1) fp /= 10, ++exp_b10;
+
+ /* Because of the code above fp may, at this point, be
+ * less than .1, this is ok because the code below can
+ * handle the leading zeros this generates, so no attempt
+ * is made to correct that here.
+ */
+
+ {
+ int czero, clead, cdigits;
+ char exponent[10];
+
+ /* Allow up to two leading zeros - this will not lengthen
+ * the number compared to using E-n.
+ */
+ if (exp_b10 < 0 && exp_b10 > -3) /* PLUS 3 TOTAL 4 */
+ {
+ czero = -exp_b10; /* PLUS 2 digits: TOTAL 3 */
+ exp_b10 = 0; /* Dot added below before first output. */
+ }
+ else
+ czero = 0; /* No zeros to add */
+
+ /* Generate the digit list, stripping trailing zeros and
+ * inserting a '.' before a digit if the exponent is 0.
+ */
+ clead = czero; /* Count of leading zeros */
+ cdigits = 0; /* Count of digits in list. */
+
+ do
+ {
+ double d;
+
+ fp *= 10;
+ /* Use modf here, not floor and subtract, so that
+ * the separation is done in one step. At the end
+ * of the loop don't break the number into parts so
+ * that the final digit is rounded.
+ */
+ if (cdigits+czero-clead+1 < (int)precision)
+ fp = modf(fp, &d);
+
+ else
+ {
+ d = floor(fp + .5);
+
+ if (d > 9)
+ {
+ /* Rounding up to 10, handle that here. */
+ if (czero > 0)
+ {
+ --czero, d = 1;
+ if (cdigits == 0) --clead;
+ }
+ else
+ {
+ while (cdigits > 0 && d > 9)
+ {
+ int ch = *--ascii;
+
+ if (exp_b10 != (-1))
+ ++exp_b10;
+
+ else if (ch == 46)
+ {
+ ch = *--ascii, ++size;
+ /* Advance exp_b10 to '1', so that the
+ * decimal point happens after the
+ * previous digit.
+ */
+ exp_b10 = 1;
+ }
+
+ --cdigits;
+ d = ch - 47; /* I.e. 1+(ch-48) */
+ }
+
+ /* Did we reach the beginning? If so adjust the
+ * exponent but take into account the leading
+ * decimal point.
+ */
+ if (d > 9) /* cdigits == 0 */
+ {
+ if (exp_b10 == (-1))
+ {
+ /* Leading decimal point (plus zeros?), if
+ * we lose the decimal point here it must
+ * be reentered below.
+ */
+ int ch = *--ascii;
+
+ if (ch == 46)
+ ++size, exp_b10 = 1;
+
+ /* Else lost a leading zero, so 'exp_b10' is
+ * still ok at (-1)
+ */
+ }
+ else
+ ++exp_b10;
+
+ /* In all cases we output a '1' */
+ d = 1;
+ }
+ }
+ }
+ fp = 0; /* Guarantees termination below. */
+ }
+
+ if (d == 0)
+ {
+ ++czero;
+ if (cdigits == 0) ++clead;
+ }
+ else
+ {
+ /* Included embedded zeros in the digit count. */
+ cdigits += czero - clead;
+ clead = 0;
+
+ while (czero > 0)
+ {
+ /* exp_b10 == (-1) means we just output the decimal
+ * place - after the DP don't adjust 'exp_b10' any
+ * more!
+ */
+ if (exp_b10 != (-1))
+ {
+ if (exp_b10 == 0) *ascii++ = 46, --size;
+ /* PLUS 1: TOTAL 4 */
+ --exp_b10;
+ }
+ *ascii++ = 48, --czero;
+ }
+
+ if (exp_b10 != (-1))
+ {
+ if (exp_b10 == 0) *ascii++ = 46, --size; /* counted
+ above */
+ --exp_b10;
+ }
+ *ascii++ = (char)(48 + (int)d), ++cdigits;
+ }
+ }
+ while (cdigits+czero-clead < (int)precision && fp > DBL_MIN);
+
+ /* The total output count (max) is now 4+precision */
+
+ /* Check for an exponent, if we don't need one we are
+ * done and just need to terminate the string. At
+ * this point exp_b10==(-1) is effectively if flag - it got
+ * to '-1' because of the decrement after outputing
+ * the decimal point above (the exponent required is
+ * *not* -1!)
+ */
+ if (exp_b10 >= (-1) && exp_b10 <= 2)
+ {
+ /* The following only happens if we didn't output the
+ * leading zeros above for negative exponent, so this
+ * doest add to the digit requirement. Note that the
+ * two zeros here can only be output if the two leading
+ * zeros were *not* output, so this doesn't increase
+ * the output count.
+ */
+ while (--exp_b10 >= 0) *ascii++ = 48;
+
+ *ascii = 0;
+
+ /* Total buffer requirement (including the '\0') is
+ * 5+precision - see check at the start.
+ */
+ return;
+ }
+
+ /* Here if an exponent is required, adjust size for
+ * the digits we output but did not count. The total
+ * digit output here so far is at most 1+precision - no
+ * decimal point and no leading or trailing zeros have
+ * been output.
+ */
+ size -= cdigits;
+
+ *ascii++ = 69, --size; /* 'E': PLUS 1 TOTAL 2+precision*/
+ if (exp_b10 < 0)
+ {
+ *ascii++ = 45, --size; /* '-': PLUS 1 TOTAL 3+precision */
+ exp_b10 = -exp_b10;
+ }
+
+ cdigits = 0;
+
+ while (exp_b10 > 0)
+ {
+ exponent[cdigits++] = (char)(48 + exp_b10 % 10);
+ exp_b10 /= 10;
+ }
+
+ /* Need another size check here for the exponent digits, so
+ * this need not be considered above.
+ */
+ if ((int)size > cdigits)
+ {
+ while (cdigits > 0) *ascii++ = exponent[--cdigits];
+
+ *ascii = 0;
+
+ return;
+ }
+ }
+ }
+ else if (!(fp >= DBL_MIN))
+ {
+ *ascii++ = 48; /* '0' */
+ *ascii = 0;
+ return;
+ }
+ else
+ {
+ *ascii++ = 105; /* 'i' */
+ *ascii++ = 110; /* 'n' */
+ *ascii++ = 102; /* 'f' */
+ *ascii = 0;
+ return;
+ }
+ }
+
+ /* Here on buffer too small. */
+ png_error(png_ptr, "ASCII conversion buffer too small");
+}
+
+# endif /* FLOATING_POINT */
+
+# ifdef PNG_FIXED_POINT_SUPPORTED
+/* Function to format a fixed point value in ASCII.
+ */
+void /* PRIVATE */
+png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size,
+ png_fixed_point fp)
+{
+ /* Require space for 10 decimal digits, a decimal point, a minus sign and a
+ * trailing \0, 13 characters:
+ */
+ if (size > 12)
+ {
+ png_uint_32 num;
+
+ /* Avoid overflow here on the minimum integer. */
+ if (fp < 0)
+ *ascii++ = 45, --size, num = -fp;
+ else
+ num = fp;
+
+ if (num <= 0x80000000U) /* else overflowed */
+ {
+ unsigned int ndigits = 0, first = 16/*flag value*/;
+ char digits[10];
+
+ while (num)
+ {
+ /* Split the low digit off num: */
+ unsigned int tmp = num/10;
+ num -= tmp*10;
+ digits[ndigits++] = (char)(48 + num);
+ /* Record the first non-zero digit, note that this is a number
+ * starting at 1, it's not actually the array index.
+ */
+ if (first == 16 && num > 0)
+ first = ndigits;
+ num = tmp;
+ }
+
+ if (ndigits > 0)
+ {
+ while (ndigits > 5) *ascii++ = digits[--ndigits];
+ /* The remaining digits are fractional digits, ndigits is '5' or
+ * smaller at this point. It is certainly not zero. Check for a
+ * non-zero fractional digit:
+ */
+ if (first <= 5)
+ {
+ unsigned int i;
+ *ascii++ = 46; /* decimal point */
+ /* ndigits may be <5 for small numbers, output leading zeros
+ * then ndigits digits to first:
+ */
+ i = 5;
+ while (ndigits < i) *ascii++ = 48, --i;
+ while (ndigits >= first) *ascii++ = digits[--ndigits];
+ /* Don't output the trailing zeros! */
+ }
+ }
+ else
+ *ascii++ = 48;
+
+ /* And null terminate the string: */
+ *ascii = 0;
+ return;
+ }
+ }
+
+ /* Here on buffer too small. */
+ png_error(png_ptr, "ASCII conversion buffer too small");
+}
+# endif /* FIXED_POINT */
+#endif /* READ_SCAL */
+
+#if defined(PNG_FLOATING_POINT_SUPPORTED) && \
+ !defined(PNG_FIXED_POINT_MACRO_SUPPORTED)
+png_fixed_point
+png_fixed(png_structp png_ptr, double fp, png_const_charp text)
+{
+ double r = floor(100000 * fp + .5);
+
+ if (r > 2147483647. || r < -2147483648.)
+ png_fixed_error(png_ptr, text);
+
+ return (png_fixed_point)r;
+}
+#endif
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || \
+ defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG__READ_pHYs_SUPPORTED)
+/* muldiv functions */
+/* This API takes signed arguments and rounds the result to the nearest
+ * integer (or, for a fixed point number - the standard argument - to
+ * the nearest .00001). Overflow and divide by zero are signalled in
+ * the result, a boolean - true on success, false on overflow.
+ */
+int
+png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times,
+ png_int_32 divisor)
+{
+ /* Return a * times / divisor, rounded. */
+ if (divisor != 0)
+ {
+ if (a == 0 || times == 0)
+ {
+ *res = 0;
+ return 1;
+ }
+ else
+ {
+#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = a;
+ r *= times;
+ r /= divisor;
+ r = floor(r+.5);
+
+ /* A png_fixed_point is a 32 bit integer. */
+ if (r <= 2147483647. && r >= -2147483648.)
+ {
+ *res = (png_fixed_point)r;
+ return 1;
+ }
+#else
+ int negative = 0;
+ png_uint_32 A, T, D;
+ png_uint_32 s16, s32, s00;
+
+ if (a < 0)
+ negative = 1, A = -a;
+ else
+ A = a;
+
+ if (times < 0)
+ negative = !negative, T = -times;
+ else
+ T = times;
+
+ if (divisor < 0)
+ negative = !negative, D = -divisor;
+ else
+ D = divisor;
+
+ /* Following can't overflow because the arguments only
+ * have 31 bits each, however the result may be 32 bits.
+ */
+ s16 = (A >> 16) * (T & 0xffff) +
+ (A & 0xffff) * (T >> 16);
+ /* Can't overflow because the a*times bit is only 30
+ * bits at most.
+ */
+ s32 = (A >> 16) * (T >> 16) + (s16 >> 16);
+ s00 = (A & 0xffff) * (T & 0xffff);
+
+ s16 = (s16 & 0xffff) << 16;
+ s00 += s16;
+
+ if (s00 < s16)
+ ++s32; /* carry */
+
+ if (s32 < D) /* else overflow */
+ {
+ /* s32.s00 is now the 64 bit product, do a standard
+ * division, we know that s32 < D, so the maximum
+ * required shift is 31.
+ */
+ int bitshift = 32;
+ png_fixed_point result = 0; /* NOTE: signed */
+
+ while (--bitshift >= 0)
+ {
+ png_uint_32 d32, d00;
+
+ if (bitshift > 0)
+ d32 = D >> (32-bitshift), d00 = D << bitshift;
+
+ else
+ d32 = 0, d00 = D;
+
+ if (s32 > d32)
+ {
+ if (s00 < d00) --s32; /* carry */
+ s32 -= d32, s00 -= d00, result += 1<<bitshift;
+ }
+
+ else
+ if (s32 == d32 && s00 >= d00)
+ s32 = 0, s00 -= d00, result += 1<<bitshift;
+ }
+
+ /* Handle the rounding. */
+ if (s00 >= (D >> 1))
+ ++result;
+
+ if (negative)
+ result = -result;
+
+ /* Check for overflow. */
+ if ((negative && result <= 0) || (!negative && result >= 0))
+ {
+ *res = result;
+ return 1;
+ }
+ }
+#endif
+ }
+ }
+
+ return 0;
+}
+#endif /* READ_GAMMA || INCH_CONVERSIONS */
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED)
+/* The following is for when the caller doesn't much care about the
+ * result.
+ */
+png_fixed_point
+png_muldiv_warn(png_structp png_ptr, png_fixed_point a, png_int_32 times,
+ png_int_32 divisor)
+{
+ png_fixed_point result;
+
+ if (png_muldiv(&result, a, times, divisor))
+ return result;
+
+ png_warning(png_ptr, "fixed point overflow ignored");
+ return 0;
+}
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED /* more fixed point functions for gammma */
+/* Calculate a reciprocal, return 0 on div-by-zero or overflow. */
+png_fixed_point
+png_reciprocal(png_fixed_point a)
+{
+#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = floor(1E10/a+.5);
+
+ if (r <= 2147483647. && r >= -2147483648.)
+ return (png_fixed_point)r;
+#else
+ png_fixed_point res;
+
+ if (png_muldiv(&res, 100000, 100000, a))
+ return res;
+#endif
+
+ return 0; /* error/overflow */
+}
+
+/* A local convenience routine. */
+static png_fixed_point
+png_product2(png_fixed_point a, png_fixed_point b)
+{
+ /* The required result is 1/a * 1/b; the following preserves accuracy. */
+#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = a * 1E-5;
+ r *= b;
+ r = floor(r+.5);
+
+ if (r <= 2147483647. && r >= -2147483648.)
+ return (png_fixed_point)r;
+#else
+ png_fixed_point res;
+
+ if (png_muldiv(&res, a, b, 100000))
+ return res;
+#endif
+
+ return 0; /* overflow */
+}
+
+/* The inverse of the above. */
+png_fixed_point
+png_reciprocal2(png_fixed_point a, png_fixed_point b)
+{
+ /* The required result is 1/a * 1/b; the following preserves accuracy. */
+#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = 1E15/a;
+ r /= b;
+ r = floor(r+.5);
+
+ if (r <= 2147483647. && r >= -2147483648.)
+ return (png_fixed_point)r;
+#else
+ /* This may overflow because the range of png_fixed_point isn't symmetric,
+ * but this API is only used for the product of file and screen gamma so it
+ * doesn't matter that the smallest number it can produce is 1/21474, not
+ * 1/100000
+ */
+ png_fixed_point res = png_product2(a, b);
+
+ if (res != 0)
+ return png_reciprocal(res);
+#endif
+
+ return 0; /* overflow */
+}
+#endif /* READ_GAMMA */
+
+#ifdef PNG_CHECK_cHRM_SUPPORTED
+/* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2,
+ * 2010: moved from pngset.c) */
+/*
+ * Multiply two 32-bit numbers, V1 and V2, using 32-bit
+ * arithmetic, to produce a 64 bit result in the HI/LO words.
+ *
+ * A B
+ * x C D
+ * ------
+ * AD || BD
+ * AC || CB || 0
+ *
+ * where A and B are the high and low 16-bit words of V1,
+ * C and D are the 16-bit words of V2, AD is the product of
+ * A and D, and X || Y is (X << 16) + Y.
+*/
+
+void /* PRIVATE */
+png_64bit_product (long v1, long v2, unsigned long *hi_product,
+ unsigned long *lo_product)
+{
+ int a, b, c, d;
+ long lo, hi, x, y;
+
+ a = (v1 >> 16) & 0xffff;
+ b = v1 & 0xffff;
+ c = (v2 >> 16) & 0xffff;
+ d = v2 & 0xffff;
+
+ lo = b * d; /* BD */
+ x = a * d + c * b; /* AD + CB */
+ y = ((lo >> 16) & 0xffff) + x;
+
+ lo = (lo & 0xffff) | ((y & 0xffff) << 16);
+ hi = (y >> 16) & 0xffff;
+
+ hi += a * c; /* AC */
+
+ *hi_product = (unsigned long)hi;
+ *lo_product = (unsigned long)lo;
+}
+#endif /* CHECK_cHRM */
+
+#ifdef PNG_READ_GAMMA_SUPPORTED /* gamma table code */
+#ifndef PNG_FLOATING_ARITHMETIC_SUPPORTED
+/* Fixed point gamma.
+ *
+ * To calculate gamma this code implements fast log() and exp() calls using only
+ * fixed point arithmetic. This code has sufficient precision for either 8 or
+ * 16 bit sample values.
+ *
+ * The tables used here were calculated using simple 'bc' programs, but C double
+ * precision floating point arithmetic would work fine. The programs are given
+ * at the head of each table.
+ *
+ * 8 bit log table
+ * This is a table of -log(value/255)/log(2) for 'value' in the range 128 to
+ * 255, so it's the base 2 logarithm of a normalized 8 bit floating point
+ * mantissa. The numbers are 32 bit fractions.
+ */
+static png_uint_32
+png_8bit_l2[128] =
+{
+# if PNG_DO_BC
+ for (i=128;i<256;++i) { .5 - l(i/255)/l(2)*65536*65536; }
+# endif
+ 4270715492U, 4222494797U, 4174646467U, 4127164793U, 4080044201U, 4033279239U,
+ 3986864580U, 3940795015U, 3895065449U, 3849670902U, 3804606499U, 3759867474U,
+ 3715449162U, 3671346997U, 3627556511U, 3584073329U, 3540893168U, 3498011834U,
+ 3455425220U, 3413129301U, 3371120137U, 3329393864U, 3287946700U, 3246774933U,
+ 3205874930U, 3165243125U, 3124876025U, 3084770202U, 3044922296U, 3005329011U,
+ 2965987113U, 2926893432U, 2888044853U, 2849438323U, 2811070844U, 2772939474U,
+ 2735041326U, 2697373562U, 2659933400U, 2622718104U, 2585724991U, 2548951424U,
+ 2512394810U, 2476052606U, 2439922311U, 2404001468U, 2368287663U, 2332778523U,
+ 2297471715U, 2262364947U, 2227455964U, 2192742551U, 2158222529U, 2123893754U,
+ 2089754119U, 2055801552U, 2022034013U, 1988449497U, 1955046031U, 1921821672U,
+ 1888774511U, 1855902668U, 1823204291U, 1790677560U, 1758320682U, 1726131893U,
+ 1694109454U, 1662251657U, 1630556815U, 1599023271U, 1567649391U, 1536433567U,
+ 1505374214U, 1474469770U, 1443718700U, 1413119487U, 1382670639U, 1352370686U,
+ 1322218179U, 1292211689U, 1262349810U, 1232631153U, 1203054352U, 1173618059U,
+ 1144320946U, 1115161701U, 1086139034U, 1057251672U, 1028498358U, 999877854U,
+ 971388940U, 943030410U, 914801076U, 886699767U, 858725327U, 830876614U,
+ 803152505U, 775551890U, 748073672U, 720716771U, 693480120U, 666362667U,
+ 639363374U, 612481215U, 585715177U, 559064263U, 532527486U, 506103872U,
+ 479792461U, 453592303U, 427502463U, 401522014U, 375650043U, 349885648U,
+ 324227938U, 298676034U, 273229066U, 247886176U, 222646516U, 197509248U,
+ 172473545U, 147538590U, 122703574U, 97967701U, 73330182U, 48790236U,
+ 24347096U, 0U
+#if 0
+ /* The following are the values for 16 bit tables - these work fine for the 8
+ * bit conversions but produce very slightly larger errors in the 16 bit log
+ * (about 1.2 as opposed to 0.7 absolute error in the final value). To use
+ * these all the shifts below must be adjusted appropriately.
+ */
+ 65166, 64430, 63700, 62976, 62257, 61543, 60835, 60132, 59434, 58741, 58054,
+ 57371, 56693, 56020, 55352, 54689, 54030, 53375, 52726, 52080, 51439, 50803,
+ 50170, 49542, 48918, 48298, 47682, 47070, 46462, 45858, 45257, 44661, 44068,
+ 43479, 42894, 42312, 41733, 41159, 40587, 40020, 39455, 38894, 38336, 37782,
+ 37230, 36682, 36137, 35595, 35057, 34521, 33988, 33459, 32932, 32408, 31887,
+ 31369, 30854, 30341, 29832, 29325, 28820, 28319, 27820, 27324, 26830, 26339,
+ 25850, 25364, 24880, 24399, 23920, 23444, 22970, 22499, 22029, 21562, 21098,
+ 20636, 20175, 19718, 19262, 18808, 18357, 17908, 17461, 17016, 16573, 16132,
+ 15694, 15257, 14822, 14390, 13959, 13530, 13103, 12678, 12255, 11834, 11415,
+ 10997, 10582, 10168, 9756, 9346, 8937, 8531, 8126, 7723, 7321, 6921, 6523,
+ 6127, 5732, 5339, 4947, 4557, 4169, 3782, 3397, 3014, 2632, 2251, 1872, 1495,
+ 1119, 744, 372
+#endif
+};
+
+static png_int_32
+png_log8bit(unsigned int x)
+{
+ unsigned int lg2 = 0;
+ /* Each time 'x' is multiplied by 2, 1 must be subtracted off the final log,
+ * because the log is actually negate that means adding 1. The final
+ * returned value thus has the range 0 (for 255 input) to 7.994 (for 1
+ * input), return 7.99998 for the overflow (log 0) case - so the result is
+ * always at most 19 bits.
+ */
+ if ((x &= 0xff) == 0)
+ return 0xffffffff;
+
+ if ((x & 0xf0) == 0)
+ lg2 = 4, x <<= 4;
+
+ if ((x & 0xc0) == 0)
+ lg2 += 2, x <<= 2;
+
+ if ((x & 0x80) == 0)
+ lg2 += 1, x <<= 1;
+
+ /* result is at most 19 bits, so this cast is safe: */
+ return (png_int_32)((lg2 << 16) + ((png_8bit_l2[x-128]+32768)>>16));
+}
+
+/* The above gives exact (to 16 binary places) log2 values for 8 bit images,
+ * for 16 bit images we use the most significant 8 bits of the 16 bit value to
+ * get an approximation then multiply the approximation by a correction factor
+ * determined by the remaining up to 8 bits. This requires an additional step
+ * in the 16 bit case.
+ *
+ * We want log2(value/65535), we have log2(v'/255), where:
+ *
+ * value = v' * 256 + v''
+ * = v' * f
+ *
+ * So f is value/v', which is equal to (256+v''/v') since v' is in the range 128
+ * to 255 and v'' is in the range 0 to 255 f will be in the range 256 to less
+ * than 258. The final factor also needs to correct for the fact that our 8 bit
+ * value is scaled by 255, whereas the 16 bit values must be scaled by 65535.
+ *
+ * This gives a final formula using a calculated value 'x' which is value/v' and
+ * scaling by 65536 to match the above table:
+ *
+ * log2(x/257) * 65536
+ *
+ * Since these numbers are so close to '1' we can use simple linear
+ * interpolation between the two end values 256/257 (result -368.61) and 258/257
+ * (result 367.179). The values used below are scaled by a further 64 to give
+ * 16 bit precision in the interpolation:
+ *
+ * Start (256): -23591
+ * Zero (257): 0
+ * End (258): 23499
+ */
+static png_int_32
+png_log16bit(png_uint_32 x)
+{
+ unsigned int lg2 = 0;
+
+ /* As above, but now the input has 16 bits. */
+ if ((x &= 0xffff) == 0)
+ return 0xffffffff;
+
+ if ((x & 0xff00) == 0)
+ lg2 = 8, x <<= 8;
+
+ if ((x & 0xf000) == 0)
+ lg2 += 4, x <<= 4;
+
+ if ((x & 0xc000) == 0)
+ lg2 += 2, x <<= 2;
+
+ if ((x & 0x8000) == 0)
+ lg2 += 1, x <<= 1;
+
+ /* Calculate the base logarithm from the top 8 bits as a 28 bit fractional
+ * value.
+ */
+ lg2 <<= 28;
+ lg2 += (png_8bit_l2[(x>>8)-128]+8) >> 4;
+
+ /* Now we need to interpolate the factor, this requires a division by the top
+ * 8 bits. Do this with maximum precision.
+ */
+ x = ((x << 16) + (x >> 9)) / (x >> 8);
+
+ /* Since we divided by the top 8 bits of 'x' there will be a '1' at 1<<24,
+ * the value at 1<<16 (ignoring this) will be 0 or 1; this gives us exactly
+ * 16 bits to interpolate to get the low bits of the result. Round the
+ * answer. Note that the end point values are scaled by 64 to retain overall
+ * precision and that 'lg2' is current scaled by an extra 12 bits, so adjust
+ * the overall scaling by 6-12. Round at every step.
+ */
+ x -= 1U << 24;
+
+ if (x <= 65536U) /* <= '257' */
+ lg2 += ((23591U * (65536U-x)) + (1U << (16+6-12-1))) >> (16+6-12);
+
+ else
+ lg2 -= ((23499U * (x-65536U)) + (1U << (16+6-12-1))) >> (16+6-12);
+
+ /* Safe, because the result can't have more than 20 bits: */
+ return (png_int_32)((lg2 + 2048) >> 12);
+}
+
+/* The 'exp()' case must invert the above, taking a 20 bit fixed point
+ * logarithmic value and returning a 16 or 8 bit number as appropriate. In
+ * each case only the low 16 bits are relevant - the fraction - since the
+ * integer bits (the top 4) simply determine a shift.
+ *
+ * The worst case is the 16 bit distinction between 65535 and 65534, this
+ * requires perhaps spurious accuracty in the decoding of the logarithm to
+ * distinguish log2(65535/65534.5) - 10^-5 or 17 bits. There is little chance
+ * of getting this accuracy in practice.
+ *
+ * To deal with this the following exp() function works out the exponent of the
+ * frational part of the logarithm by using an accurate 32 bit value from the
+ * top four fractional bits then multiplying in the remaining bits.
+ */
+static png_uint_32
+png_32bit_exp[16] =
+{
+# if PNG_DO_BC
+ for (i=0;i<16;++i) { .5 + e(-i/16*l(2))*2^32; }
+# endif
+ /* NOTE: the first entry is deliberately set to the maximum 32 bit value. */
+ 4294967295U, 4112874773U, 3938502376U, 3771522796U, 3611622603U, 3458501653U,
+ 3311872529U, 3171459999U, 3037000500U, 2908241642U, 2784941738U, 2666869345U,
+ 2553802834U, 2445529972U, 2341847524U, 2242560872U
+};
+
+/* Adjustment table; provided to explain the numbers in the code below. */
+#if PNG_DO_BC
+for (i=11;i>=0;--i){ print i, " ", (1 - e(-(2^i)/65536*l(2))) * 2^(32-i), "\n"}
+ 11 44937.64284865548751208448
+ 10 45180.98734845585101160448
+ 9 45303.31936980687359311872
+ 8 45364.65110595323018870784
+ 7 45395.35850361789624614912
+ 6 45410.72259715102037508096
+ 5 45418.40724413220722311168
+ 4 45422.25021786898173001728
+ 3 45424.17186732298419044352
+ 2 45425.13273269940811464704
+ 1 45425.61317555035558641664
+ 0 45425.85339951654943850496
+#endif
+
+static png_uint_32
+png_exp(png_fixed_point x)
+{
+ if (x > 0 && x <= 0xfffff) /* Else overflow or zero (underflow) */
+ {
+ /* Obtain a 4 bit approximation */
+ png_uint_32 e = png_32bit_exp[(x >> 12) & 0xf];
+
+ /* Incorporate the low 12 bits - these decrease the returned value by
+ * multiplying by a number less than 1 if the bit is set. The multiplier
+ * is determined by the above table and the shift. Notice that the values
+ * converge on 45426 and this is used to allow linear interpolation of the
+ * low bits.
+ */
+ if (x & 0x800)
+ e -= (((e >> 16) * 44938U) + 16U) >> 5;
+
+ if (x & 0x400)
+ e -= (((e >> 16) * 45181U) + 32U) >> 6;
+
+ if (x & 0x200)
+ e -= (((e >> 16) * 45303U) + 64U) >> 7;
+
+ if (x & 0x100)
+ e -= (((e >> 16) * 45365U) + 128U) >> 8;
+
+ if (x & 0x080)
+ e -= (((e >> 16) * 45395U) + 256U) >> 9;
+
+ if (x & 0x040)
+ e -= (((e >> 16) * 45410U) + 512U) >> 10;
+
+ /* And handle the low 6 bits in a single block. */
+ e -= (((e >> 16) * 355U * (x & 0x3fU)) + 256U) >> 9;
+
+ /* Handle the upper bits of x. */
+ e >>= x >> 16;
+ return e;
+ }
+
+ /* Check for overflow */
+ if (x <= 0)
+ return png_32bit_exp[0];
+
+ /* Else underflow */
+ return 0;
+}
+
+static png_byte
+png_exp8bit(png_fixed_point lg2)
+{
+ /* Get a 32 bit value: */
+ png_uint_32 x = png_exp(lg2);
+
+ /* Convert the 32 bit value to 0..255 by multiplying by 256-1, note that the
+ * second, rounding, step can't overflow because of the first, subtraction,
+ * step.
+ */
+ x -= x >> 8;
+ return (png_byte)((x + 0x7fffffU) >> 24);
+}
+
+static png_uint_16
+png_exp16bit(png_fixed_point lg2)
+{
+ /* Get a 32 bit value: */
+ png_uint_32 x = png_exp(lg2);
+
+ /* Convert the 32 bit value to 0..65535 by multiplying by 65536-1: */
+ x -= x >> 16;
+ return (png_uint_16)((x + 32767U) >> 16);
+}
+#endif /* FLOATING_ARITHMETIC */
+
+png_byte
+png_gamma_8bit_correct(unsigned int value, png_fixed_point gamma_val)
+{
+ if (value > 0 && value < 255)
+ {
+# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = floor(255*pow(value/255.,gamma_val*.00001)+.5);
+ return (png_byte)r;
+# else
+ png_int_32 lg2 = png_log8bit(value);
+ png_fixed_point res;
+
+ if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1))
+ return png_exp8bit(res);
+
+ /* Overflow. */
+ value = 0;
+# endif
+ }
+
+ return (png_byte)value;
+}
+
+png_uint_16
+png_gamma_16bit_correct(unsigned int value, png_fixed_point gamma_val)
+{
+ if (value > 0 && value < 65535)
+ {
+# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ double r = floor(65535*pow(value/65535.,gamma_val*.00001)+.5);
+ return (png_uint_16)r;
+# else
+ png_int_32 lg2 = png_log16bit(value);
+ png_fixed_point res;
+
+ if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1))
+ return png_exp16bit(res);
+
+ /* Overflow. */
+ value = 0;
+# endif
+ }
+
+ return (png_uint_16)value;
+}
+
+/* This does the right thing based on the bit_depth field of the
+ * png_struct, interpreting values as 8 or 16 bit. While the result
+ * is nominally a 16 bit value if bit depth is 8 then the result is
+ * 8 bit (as are the arguments.)
+ */
+png_uint_16 /* PRIVATE */
+png_gamma_correct(png_structp png_ptr, unsigned int value,
+ png_fixed_point gamma_val)
+{
+ if (png_ptr->bit_depth == 8)
+ return png_gamma_8bit_correct(value, gamma_val);
+
+ else
+ return png_gamma_16bit_correct(value, gamma_val);
+}
+
+/* This is the shared test on whether a gamma value is 'significant' - whether
+ * it is worth doing gamma correction.
+ */
+int /* PRIVATE */
+png_gamma_significant(png_fixed_point gamma_val)
+{
+ return gamma_val < PNG_FP_1 - PNG_GAMMA_THRESHOLD_FIXED ||
+ gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED;
+}
+
+/* Internal function to build a single 16 bit table - the table consists of
+ * 'num' 256 entry subtables, where 'num' is determined by 'shift' - the amount
+ * to shift the input values right (or 16-number_of_signifiant_bits).
+ *
+ * The caller is responsible for ensuring that the table gets cleaned up on
+ * png_error (i.e. if one of the mallocs below fails) - i.e. the *table argument
+ * should be somewhere that will be cleaned.
+ */
+static void
+png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable,
+ PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val)
+{
+ /* Various values derived from 'shift': */
+ PNG_CONST unsigned int num = 1U << (8U - shift);
+ PNG_CONST unsigned int max = (1U << (16U - shift))-1U;
+ PNG_CONST unsigned int max_by_2 = 1U << (15U-shift);
+ unsigned int i;
+
+ png_uint_16pp table = *ptable =
+ (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p));
+
+ for (i = 0; i < num; i++)
+ {
+ png_uint_16p sub_table = table[i] =
+ (png_uint_16p)png_malloc(png_ptr, 256 * png_sizeof(png_uint_16));
+
+ /* The 'threshold' test is repeated here because it can arise for one of
+ * the 16 bit tables even if the others don't hit it.
+ */
+ if (png_gamma_significant(gamma_val))
+ {
+ /* The old code would overflow at the end and this would cause the
+ * 'pow' function to return a result >1, resulting in an
+ * arithmetic error. This code follows the spec exactly; ig is
+ * the recovered input sample, it always has 8-16 bits.
+ *
+ * We want input * 65535/max, rounded, the arithmetic fits in 32
+ * bits (unsigned) so long as max <= 32767.
+ */
+ unsigned int j;
+ for (j = 0; j < 256; j++)
+ {
+ png_uint_32 ig = (j << (8-shift)) + i;
+# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+ /* Inline the 'max' scaling operation: */
+ double d = floor(65535*pow(ig/(double)max, gamma_val*.00001)+.5);
+ sub_table[j] = (png_uint_16)d;
+# else
+ if (shift)
+ ig = (ig * 65535U + max_by_2)/max;
+
+ sub_table[j] = png_gamma_16bit_correct(ig, gamma_val);
+# endif
+ }
+ }
+ else
+ {
+ /* We must still build a table, but do it the fast way. */
+ unsigned int j;
+
+ for (j = 0; j < 256; j++)
+ {
+ png_uint_32 ig = (j << (8-shift)) + i;
+
+ if (shift)
+ ig = (ig * 65535U + max_by_2)/max;
+
+ sub_table[j] = (png_uint_16)ig;
+ }
+ }
+ }
+}
+
+/* NOTE: this function expects the *inverse* of the overall gamma transformation
+ * required.
+ */
+static void
+png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable,
+ PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val)
+{
+ PNG_CONST unsigned int num = 1U << (8U - shift);
+ PNG_CONST unsigned int max = (1U << (16U - shift))-1U;
+ unsigned int i;
+ png_uint_32 last;
+
+ png_uint_16pp table = *ptable =
+ (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p));
+
+ /* 'num' is the number of tables and also the number of low bits of low
+ * bits of the input 16 bit value used to select a table. Each table is
+ * itself index by the high 8 bits of the value.
+ */
+ for (i = 0; i < num; i++)
+ table[i] = (png_uint_16p)png_malloc(png_ptr,
+ 256 * png_sizeof(png_uint_16));
+
+ /* 'gamma_val' is set to the reciprocal of the value calculated above, so
+ * pow(out,g) is an *input* value. 'last' is the last input value set.
+ *
+ * In the loop 'i' is used to find output values. Since the output is 8
+ * bit there are only 256 possible values. The tables are set up to
+ * select the closest possible output value for each input by finding
+ * the input value at the boundary between each pair of output values
+ * and filling the table up to that boundary with the lower output
+ * value.
+ *
+ * The boundary values are 0.5,1.5..253.5,254.5. Since these are 9 bit
+ * values the code below uses a 16 bit value in i; the values start at
+ * 128.5 (for 0.5) and step by 257, for a total of 254 values (the last
+ * entries are filled with 255). Start i at 128 and fill all 'last'
+ * table entries <= 'max'
+ */
+ last = 0;
+ for (i = 0; i < 255; ++i) /* 8 bit output value */
+ {
+ /* Find the corresponding maximum input value */
+ png_uint_16 out = (png_uint_16)(i * 257U); /* 16 bit output value */
+
+ /* Find the boundary value in 16 bits: */
+ png_uint_32 bound = png_gamma_16bit_correct(out+128U, gamma_val);
+
+ /* Adjust (round) to (16-shift) bits: */
+ bound = (bound * max + 32768U)/65535U + 1U;
+
+ while (last < bound)
+ {
+ table[last & (0xffU >> shift)][last >> (8U - shift)] = out;
+ last++;
+ }
+ }
+
+ /* And fill in the final entries. */
+ while (last < (num << 8))
+ {
+ table[last & (0xff >> shift)][last >> (8U - shift)] = 65535U;
+ last++;
+ }
+}
+
+/* Build a single 8 bit table: same as the 16 bit case but much simpler (and
+ * typically much faster). Note that libpng currently does no sBIT processing
+ * (apparently contrary to the spec) so a 256 entry table is always generated.
+ */
+static void
+png_build_8bit_table(png_structp png_ptr, png_bytepp ptable,
+ PNG_CONST png_fixed_point gamma_val)
+{
+ unsigned int i;
+ png_bytep table = *ptable = (png_bytep)png_malloc(png_ptr, 256);
+
+ if (png_gamma_significant(gamma_val)) for (i=0; i<256; i++)
+ table[i] = png_gamma_8bit_correct(i, gamma_val);
+
+ else for (i=0; i<256; ++i)
+ table[i] = (png_byte)i;
+}
+
+/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit
+ * tables, we don't make a full table if we are reducing to 8-bit in
+ * the future. Note also how the gamma_16 tables are segmented so that
+ * we don't need to allocate > 64K chunks for a full 16-bit table.
+ */
+void /* PRIVATE */
+png_build_gamma_table(png_structp png_ptr, int bit_depth)
+{
+ png_debug(1, "in png_build_gamma_table");
+
+ if (bit_depth <= 8)
+ {
+ png_build_8bit_table(png_ptr, &png_ptr->gamma_table,
+ png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma,
+ png_ptr->screen_gamma) : PNG_FP_1);
+
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
+ defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
+ if (png_ptr->transformations & ((PNG_BACKGROUND) | PNG_RGB_TO_GRAY))
+ {
+ png_build_8bit_table(png_ptr, &png_ptr->gamma_to_1,
+ png_reciprocal(png_ptr->gamma));
+
+ png_build_8bit_table(png_ptr, &png_ptr->gamma_from_1,
+ png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) :
+ png_ptr->gamma/* Probably doing rgb_to_gray */);
+ }
+#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */
+ }
+ else
+ {
+ png_byte shift, sig_bit;
+
+ if (png_ptr->color_type & PNG_COLOR_MASK_COLOR)
+ {
+ sig_bit = png_ptr->sig_bit.red;
+
+ if (png_ptr->sig_bit.green > sig_bit)
+ sig_bit = png_ptr->sig_bit.green;
+
+ if (png_ptr->sig_bit.blue > sig_bit)
+ sig_bit = png_ptr->sig_bit.blue;
+ }
+ else
+ sig_bit = png_ptr->sig_bit.gray;
+
+ /* 16 bit gamma code uses this equation:
+ *
+ * ov = table[(iv & 0xff) >> gamma_shift][iv >> 8]
+ *
+ * Where 'iv' is the input color value and 'ov' is the output value -
+ * pow(iv, gamma).
+ *
+ * Thus the gamma table consists of up to 256 256 entry tables. The table
+ * is selected by the (8-gamma_shift) most significant of the low 8 bits of
+ * the color value then indexed by the upper 8 bits:
+ *
+ * table[low bits][high 8 bits]
+ *
+ * So the table 'n' corresponds to all those 'iv' of:
+ *
+ * <all high 8 bit values><n << gamma_shift>..<(n+1 << gamma_shift)-1>
+ *
+ */
+ if (sig_bit > 0 && sig_bit < 16U)
+ shift = (png_byte)(16U - sig_bit); /* shift == insignificant bits */
+
+ else
+ shift = 0; /* keep all 16 bits */
+
+ if (png_ptr->transformations & PNG_16_TO_8)
+ {
+ /* PNG_MAX_GAMMA_8 is the number of bits to keep - effectively
+ * the significant bits in the *input* when the output will
+ * eventually be 8 bits. By default it is 11.
+ */
+ if (shift < (16U - PNG_MAX_GAMMA_8))
+ shift = (16U - PNG_MAX_GAMMA_8);
+ }
+
+ if (shift > 8U)
+ shift = 8U; /* Guarantees at least one table! */
+
+ png_ptr->gamma_shift = shift;
+
+#ifdef PNG_16BIT_SUPPORTED
+ if (png_ptr->transformations & (PNG_16_TO_8 | PNG_BACKGROUND))
+#endif
+ png_build_16to8_table(png_ptr, &png_ptr->gamma_16_table, shift,
+ png_ptr->screen_gamma > 0 ? png_product2(png_ptr->gamma,
+ png_ptr->screen_gamma) : PNG_FP_1);
+
+#ifdef PNG_16BIT_SUPPORTED
+ else
+ png_build_16bit_table(png_ptr, &png_ptr->gamma_16_table, shift,
+ png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma,
+ png_ptr->screen_gamma) : PNG_FP_1);
+#endif
+
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
+ defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
+ if (png_ptr->transformations & (PNG_BACKGROUND | PNG_RGB_TO_GRAY))
+ {
+ png_build_16bit_table(png_ptr, &png_ptr->gamma_16_to_1, shift,
+ png_reciprocal(png_ptr->gamma));
+
+ /* Notice that the '16 from 1' table should be full precision, however
+ * the lookup on this table still uses gamma_shift, so it can't be.
+ * TODO: fix this.
+ */
+ png_build_16bit_table(png_ptr, &png_ptr->gamma_16_from_1, shift,
+ png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) :
+ png_ptr->gamma/* Probably doing rgb_to_gray */);
+ }
+#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */
+ }
+}
+#endif /* READ_GAMMA */
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
/* png.h - header file for PNG reference library
*
- * libpng version 1.4.4 - September 23, 2010
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * libpng version 1.5.2 - March 31, 2011
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* This code is released under the libpng license (See LICENSE, below)
*
* Authors and maintainers:
- * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
- * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- * libpng versions 0.97, January 1998, through 1.4.4 - September 23, 2010: Glenn
- * See also "Contributing Authors", below.
+ * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
+ * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
+ * libpng versions 0.97, January 1998, through 1.5.2 - March 31, 2011: Glenn
+ * See also "Contributing Authors", below.
*
* Note about libpng version numbers:
*
- * Due to various miscommunications, unforeseen code incompatibilities
- * and occasional factors outside the authors' control, version numbering
- * on the library has not always been consistent and straightforward.
- * The following table summarizes matters since version 0.89c, which was
- * the first widely used release:
+ * Due to various miscommunications, unforeseen code incompatibilities
+ * and occasional factors outside the authors' control, version numbering
+ * on the library has not always been consistent and straightforward.
+ * The following table summarizes matters since version 0.89c, which was
+ * the first widely used release:
*
* source png.h png.h shared-lib
* version string int version
* 1.4.1beta01-03 14 10401 14.so.14.1[.0]
* 1.4.1rc01 14 10401 14.so.14.1[.0]
* 1.4.1beta04-12 14 10401 14.so.14.1[.0]
- * 1.4.1rc02-04 14 10401 14.so.14.1[.0]
* 1.4.1 14 10401 14.so.14.1[.0]
- * 1.4.2beta01 14 10402 14.so.14.2[.0]
- * 1.4.2rc02-06 14 10402 14.so.14.2[.0]
* 1.4.2 14 10402 14.so.14.2[.0]
- * 1.4.3beta01-05 14 10403 14.so.14.3[.0]
- * 1.4.3rc01-03 14 10403 14.so.14.3[.0]
* 1.4.3 14 10403 14.so.14.3[.0]
- * 1.4.4beta01-08 14 10404 14.so.14.4[.0]
- * 1.4.4rc01-06 14 10404 14.so.14.4[.0]
+ * 1.4.4 14 10404 14.so.14.4[.0]
+ * 1.5.0beta01-58 15 10500 15.so.15.0[.0]
+ * 1.5.0rc01-07 15 10500 15.so.15.0[.0]
+ * 1.5.0 15 10500 15.so.15.0[.0]
+ * 1.5.1beta01-11 15 10501 15.so.15.1[.0]
+ * 1.5.1rc01-02 15 10501 15.so.15.1[.0]
+ * 1.5.1 15 10501 15.so.15.1[.0]
+ * 1.5.2beta01-03 15 10502 15.so.15.2[.0]
+ * 1.5.2rc01-03 15 10502 15.so.15.2[.0]
+ * 1.5.2 15 10502 15.so.15.2[.0]
*
- * Henceforth the source version will match the shared-library major
- * and minor numbers; the shared-library major version number will be
- * used for changes in backward compatibility, as it is intended. The
- * PNG_LIBPNG_VER macro, which is not used within libpng but is available
- * for applications, is an unsigned integer of the form xyyzz corresponding
- * to the source version x.y.z (leading zeros in y and z). Beta versions
- * were given the previous public release number plus a letter, until
- * version 1.0.6j; from then on they were given the upcoming public
- * release number plus "betaNN" or "rcN".
+ * Henceforth the source version will match the shared-library major
+ * and minor numbers; the shared-library major version number will be
+ * used for changes in backward compatibility, as it is intended. The
+ * PNG_LIBPNG_VER macro, which is not used within libpng but is available
+ * for applications, is an unsigned integer of the form xyyzz corresponding
+ * to the source version x.y.z (leading zeros in y and z). Beta versions
+ * were given the previous public release number plus a letter, until
+ * version 1.0.6j; from then on they were given the upcoming public
+ * release number plus "betaNN" or "rcN".
*
- * Binary incompatibility exists only when applications make direct access
- * to the info_ptr or png_ptr members through png.h, and the compiled
- * application is loaded with a different version of the library.
+ * Binary incompatibility exists only when applications make direct access
+ * to the info_ptr or png_ptr members through png.h, and the compiled
+ * application is loaded with a different version of the library.
*
- * DLLNUM will change each time there are forward or backward changes
- * in binary compatibility (e.g., when a new feature is added).
+ * DLLNUM will change each time there are forward or backward changes
+ * in binary compatibility (e.g., when a new feature is added).
*
- * See libpng.txt or libpng.3 for more information. The PNG specification
- * is available as a W3C Recommendation and as an ISO Specification,
- * <http://www.w3.org/TR/2003/REC-PNG-20031110/
+ * See libpng-manual.txt or libpng.3 for more information. The PNG
+ * specification is available as a W3C Recommendation and as an ISO
+ * Specification, <http://www.w3.org/TR/2003/REC-PNG-20031110/
*/
/*
*
* This code is released under the libpng license.
*
- * libpng versions 1.2.6, August 15, 2004, through 1.4.4, September 23, 2010, are
- * Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are
+ * libpng versions 1.2.6, August 15, 2004, through 1.5.2, March 31, 2011, are
+ * Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
* distributed according to the same disclaimer and license as libpng-1.2.5
* with the following individual added to the list of Contributing Authors:
*
* source code, or portions hereof, for any purpose, without fee, subject
* to the following restrictions:
*
- * 1. The origin of this source code must not be misrepresented.
+ * 1. The origin of this source code must not be misrepresented.
*
- * 2. Altered versions must be plainly marked as such and
- * must not be misrepresented as being the original source.
+ * 2. Altered versions must be plainly marked as such and must not
+ * be misrepresented as being the original source.
*
- * 3. This Copyright notice may not be removed or altered from
- * any source or altered source distribution.
+ * 3. This Copyright notice may not be removed or altered from
+ * any source or altered source distribution.
*
* The Contributing Authors and Group 42, Inc. specifically permit, without
* fee, and encourage the use of this source code as a component to
* A "png_get_copyright" function is available, for convenient use in "about"
* boxes and the like:
*
- * printf("%s",png_get_copyright(NULL));
+ * printf("%s", png_get_copyright(NULL));
*
* Also, the PNG logo (in PNG format, of course) is supplied in the
* files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
* Y2K compliance in libpng:
* =========================
*
- * September 23, 2010
+ * March 31, 2011
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
*
* This is your unofficial assurance that libpng from version 0.71 and
- * upward through 1.4.4 are Y2K compliant. It is my belief that earlier
- * versions were also Y2K compliant.
+ * upward through 1.5.2 are Y2K compliant. It is my belief that
+ * earlier versions were also Y2K compliant.
*
* Libpng only has three year fields. One is a 2-byte unsigned integer
* that will hold years up to 65535. The other two hold the date in text
#ifndef PNG_H
#define PNG_H
-/* This is not the place to learn how to use libpng. The file libpng.txt
+/* This is not the place to learn how to use libpng. The file libpng-manual.txt
* describes how to use libpng, and the file example.c summarizes it
* with some code on which to build. This file is useful for looking
* at the actual function definitions and structure components.
*/
/* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.4.4"
+#define PNG_LIBPNG_VER_STRING "1.5.2"
#define PNG_HEADER_VERSION_STRING \
- " libpng version 1.4.4 - September 23, 2010\n"
+ " libpng version 1.5.2 - March 31, 2011\n"
-#define PNG_LIBPNG_VER_SONUM 14
-#define PNG_LIBPNG_VER_DLLNUM 14
+#define PNG_LIBPNG_VER_SONUM 15
+#define PNG_LIBPNG_VER_DLLNUM 15
/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
#define PNG_LIBPNG_VER_MAJOR 1
-#define PNG_LIBPNG_VER_MINOR 4
-#define PNG_LIBPNG_VER_RELEASE 4
+#define PNG_LIBPNG_VER_MINOR 5
+#define PNG_LIBPNG_VER_RELEASE 2
/* This should match the numeric part of the final component of
* PNG_LIBPNG_VER_STRING, omitting any leading zero:
*/
* version 1.0.0 was mis-numbered 100 instead of 10000). From
* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
*/
-#define PNG_LIBPNG_VER 10404 /* 1.4.4 */
+#define PNG_LIBPNG_VER 10502 /* 1.5.2 */
-#ifndef PNG_VERSION_INFO_ONLY
-/* Include the compression library's header */
-#include "zlib.h"
+/* Library configuration: these options cannot be changed after
+ * the library has been built.
+ */
+#ifndef PNGLCONF_H
+ /* If pnglibconf.h is missing, you can
+ * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h
+ */
+# include "pnglibconf.h"
#endif
-/* Include all user configurable info, including optional assembler routines */
-#include "pngconf.h"
+#ifndef PNG_VERSION_INFO_ONLY
+# ifndef PNG_BUILDING_SYMBOL_TABLE
+ /*
+ * Standard header files (not needed for the version info or while
+ * building symbol table -- see scripts/pnglibconf.dfa)
+ */
+# ifdef PNG_SETJMP_SUPPORTED
+# include <setjmp.h>
+# endif
+
+ /* Need the time information for converting tIME chunks, it
+ * defines struct tm:
+ */
+# ifdef PNG_CONVERT_tIME_SUPPORTED
+ /* "time.h" functions are not supported on all operating systems */
+# include <time.h>
+# endif
+# endif
+
+/* Machine specific configuration. */
+# include "pngconf.h"
+#endif
/*
* Added at libpng-1.2.8
* StringFileInfo block must contain a SpecialBuild string.
*/
-#ifdef PNG_USER_PRIVATEBUILD
+#ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */
# define PNG_LIBPNG_BUILD_TYPE \
- (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE)
+ (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE)
#else
# ifdef PNG_LIBPNG_SPECIALBUILD
# define PNG_LIBPNG_BUILD_TYPE \
- (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL)
+ (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL)
# else
# define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE)
# endif
extern "C" {
#endif /* __cplusplus */
-/* This file is arranged in several sections. The first section contains
- * structure and type definitions. The second section contains the external
- * library functions, while the third has the internal library functions,
- * which applications aren't expected to use directly.
- */
-
-/* Variables declared in png.c - only it needs to define PNG_NO_EXTERN */
-#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN)
/* Version information for C files, stored in png.c. This had better match
* the version above.
*/
#define png_libpng_ver png_get_header_ver(NULL)
-#endif /* PNG_NO_EXTERN */
+/* This file is arranged in several sections:
+ *
+ * 1. Any configuration options that can be specified by for the application
+ * code when it is built. (Build time configuration is in pnglibconf.h)
+ * 2. Type definitions (base types are defined in pngconf.h), structure
+ * definitions.
+ * 3. Exported library functions.
+ *
+ * The library source code has additional files (principally pngpriv.h) that
+ * allow configuration of the library.
+ */
+/* Section 1: run time configuration
+ * See pnglibconf.h for build time configuration
+ *
+ * Run time configuration allows the application to choose between
+ * implementations of certain arithmetic APIs. The default is set
+ * at build time and recorded in pnglibconf.h, but it is safe to
+ * override these (and only these) settings. Note that this won't
+ * change what the library does, only application code, and the
+ * settings can (and probably should) be made on a per-file basis
+ * by setting the #defines before including png.h
+ *
+ * Use macros to read integers from PNG data or use the exported
+ * functions?
+ * PNG_USE_READ_MACROS: use the macros (see below) Note that
+ * the macros evaluate their argument multiple times.
+ * PNG_NO_USE_READ_MACROS: call the relevant library function.
+ *
+ * Use the alternative algorithm for compositing alpha samples that
+ * does not use division?
+ * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division'
+ * algorithm.
+ * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm.
+ *
+ * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is
+ * false?
+ * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error
+ * APIs to png_warning.
+ * Otherwise the calls are mapped to png_error.
+ */
+
+/* Section 2: type definitions, including structures and compile time
+ * constants.
+ * See pngconf.h for base types that vary by machine/system
+ */
+
+/* This triggers a compiler error in png.c, if png.c and png.h
+ * do not agree upon the version number.
+ */
+typedef char* png_libpng_version_1_5_2;
/* Three color definitions. The order of the red, green, and blue, (and the
* exact size) is not important, although the size of the fields need to
png_byte blue;
} png_color;
typedef png_color FAR * png_colorp;
+typedef PNG_CONST png_color FAR * png_const_colorp;
typedef png_color FAR * FAR * png_colorpp;
typedef struct png_color_16_struct
png_uint_16 gray; /* for use in grayscale files */
} png_color_16;
typedef png_color_16 FAR * png_color_16p;
+typedef PNG_CONST png_color_16 FAR * png_const_color_16p;
typedef png_color_16 FAR * FAR * png_color_16pp;
typedef struct png_color_8_struct
png_byte alpha; /* for alpha channel files */
} png_color_8;
typedef png_color_8 FAR * png_color_8p;
+typedef PNG_CONST png_color_8 FAR * png_const_color_8p;
typedef png_color_8 FAR * FAR * png_color_8pp;
/*
png_uint_16 frequency;
} png_sPLT_entry;
typedef png_sPLT_entry FAR * png_sPLT_entryp;
+typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp;
typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp;
/* When the depth of the sPLT palette is 8 bits, the color and alpha samples
png_int_32 nentries; /* number of palette entries */
} png_sPLT_t;
typedef png_sPLT_t FAR * png_sPLT_tp;
+typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp;
typedef png_sPLT_t FAR * FAR * png_sPLT_tpp;
#ifdef PNG_TEXT_SUPPORTED
png_charp text; /* comment, may be an empty string (ie "")
or a NULL pointer */
png_size_t text_length; /* length of the text string */
-#ifdef PNG_iTXt_SUPPORTED
png_size_t itxt_length; /* length of the itxt string */
png_charp lang; /* language code, 0-79 characters
or a NULL pointer */
png_charp lang_key; /* keyword translated UTF-8 string, 0 or more
chars or a NULL pointer */
-#endif
} png_text;
typedef png_text FAR * png_textp;
+typedef PNG_CONST png_text FAR * png_const_textp;
typedef png_text FAR * FAR * png_textpp;
#endif
png_byte second; /* second of minute, 0 - 60 (for leap seconds) */
} png_time;
typedef png_time FAR * png_timep;
+typedef PNG_CONST png_time FAR * png_const_timep;
typedef png_time FAR * FAR * png_timepp;
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
- defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
+ defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
/* png_unknown_chunk is a structure to hold queued chunks for which there is
* no specific support. The idea is that we can use this to queue
* up private chunks for output even though the library doesn't actually
}
png_unknown_chunk;
typedef png_unknown_chunk FAR * png_unknown_chunkp;
+typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp;
typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp;
#endif
-/* png_info is a structure that holds the information in a PNG file so
- * that the application can find out the characteristics of the image.
- * If you are reading the file, this structure will tell you what is
- * in the PNG file. If you are writing the file, fill in the information
- * you want to put into the PNG file, then call png_write_info().
- * The names chosen should be very close to the PNG specification, so
- * consult that document for information about the meaning of each field.
- *
- * With libpng < 0.95, it was only possible to directly set and read the
- * the values in the png_info_struct, which meant that the contents and
- * order of the values had to remain fixed. With libpng 0.95 and later,
- * however, there are now functions that abstract the contents of
- * png_info_struct from the application, so this makes it easier to use
- * libpng with dynamic libraries, and even makes it possible to use
- * libraries that don't have all of the libpng ancillary chunk-handing
- * functionality.
- *
- * In any case, the order of the parameters in png_info_struct should NOT
- * be changed for as long as possible to keep compatibility with applications
- * that use the old direct-access method with png_info_struct.
- *
- * The following members may have allocated storage attached that should be
- * cleaned up before the structure is discarded: palette, trans, text,
- * pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile,
- * splt_palettes, scal_unit, row_pointers, and unknowns. By default, these
- * are automatically freed when the info structure is deallocated, if they were
- * allocated internally by libpng. This behavior can be changed by means
- * of the png_data_freer() function.
- *
- * More allocation details: all the chunk-reading functions that
- * change these members go through the corresponding png_set_*
- * functions. A function to clear these members is available: see
- * png_free_data(). The png_set_* functions do not depend on being
- * able to point info structure members to any of the storage they are
- * passed (they make their own copies), EXCEPT that the png_set_text
- * functions use the same storage passed to them in the text_ptr or
- * itxt_ptr structure argument, and the png_set_rows and png_set_unknowns
- * functions do not make their own copies.
- */
-typedef struct png_info_struct
-{
- /* the following are necessary for every PNG file */
- png_uint_32 width PNG_DEPSTRUCT; /* width of image in pixels (from IHDR) */
- png_uint_32 height PNG_DEPSTRUCT; /* height of image in pixels (from IHDR) */
- png_uint_32 valid PNG_DEPSTRUCT; /* valid chunk data (see PNG_INFO_
- below) */
- png_size_t rowbytes PNG_DEPSTRUCT; /* bytes needed to hold an untransformed
- row */
- png_colorp palette PNG_DEPSTRUCT; /* array of color values
- (valid & PNG_INFO_PLTE) */
- png_uint_16 num_palette PNG_DEPSTRUCT; /* number of color entries in
- "palette" (PLTE) */
- png_uint_16 num_trans PNG_DEPSTRUCT; /* number of transparent palette
- color (tRNS) */
- png_byte bit_depth PNG_DEPSTRUCT; /* 1, 2, 4, 8, or 16 bits/channel
- (from IHDR) */
- png_byte color_type PNG_DEPSTRUCT; /* see PNG_COLOR_TYPE_ below
- (from IHDR) */
- /* The following three should have been named *_method not *_type */
- png_byte compression_type PNG_DEPSTRUCT; /* must be
- PNG_COMPRESSION_TYPE_BASE (IHDR) */
- png_byte filter_type PNG_DEPSTRUCT; /* must be PNG_FILTER_TYPE_BASE
- (from IHDR) */
- png_byte interlace_type PNG_DEPSTRUCT; /* One of PNG_INTERLACE_NONE,
- PNG_INTERLACE_ADAM7 */
-
- /* The following is informational only on read, and not used on writes. */
- png_byte channels PNG_DEPSTRUCT; /* number of data channels per
- pixel (1, 2, 3, 4) */
- png_byte pixel_depth PNG_DEPSTRUCT; /* number of bits per pixel */
- png_byte spare_byte PNG_DEPSTRUCT; /* to align the data, and for
- future use */
- png_byte signature[8] PNG_DEPSTRUCT; /* magic bytes read by libpng
- from start of file */
-
- /* The rest of the data is optional. If you are reading, check the
- * valid field to see if the information in these are valid. If you
- * are writing, set the valid field to those chunks you want written,
- * and initialize the appropriate fields below.
- */
-
-#if defined(PNG_gAMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED)
- /* The gAMA chunk describes the gamma characteristics of the system
- * on which the image was created, normally in the range [1.0, 2.5].
- * Data is valid if (valid & PNG_INFO_gAMA) is non-zero.
- */
- float gamma PNG_DEPSTRUCT; /* gamma value of image,
- if (valid & PNG_INFO_gAMA) */
-#endif
-
-#ifdef PNG_sRGB_SUPPORTED
- /* GR-P, 0.96a */
- /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */
- png_byte srgb_intent PNG_DEPSTRUCT; /* sRGB rendering intent
- [0, 1, 2, or 3] */
-#endif
-
-#ifdef PNG_TEXT_SUPPORTED
- /* The tEXt, and zTXt chunks contain human-readable textual data in
- * uncompressed, compressed, and optionally compressed forms, respectively.
- * The data in "text" is an array of pointers to uncompressed,
- * null-terminated C strings. Each chunk has a keyword that describes the
- * textual data contained in that chunk. Keywords are not required to be
- * unique, and the text string may be empty. Any number of text chunks may
- * be in an image.
- */
- int num_text PNG_DEPSTRUCT; /* number of comments read/to write */
- int max_text PNG_DEPSTRUCT; /* current size of text array */
- png_textp text PNG_DEPSTRUCT; /* array of comments read/to write */
-#endif /* PNG_TEXT_SUPPORTED */
-
-#ifdef PNG_tIME_SUPPORTED
- /* The tIME chunk holds the last time the displayed image data was
- * modified. See the png_time struct for the contents of this struct.
- */
- png_time mod_time PNG_DEPSTRUCT;
-#endif
-
-#ifdef PNG_sBIT_SUPPORTED
- /* The sBIT chunk specifies the number of significant high-order bits
- * in the pixel data. Values are in the range [1, bit_depth], and are
- * only specified for the channels in the pixel data. The contents of
- * the low-order bits is not specified. Data is valid if
- * (valid & PNG_INFO_sBIT) is non-zero.
- */
- png_color_8 sig_bit PNG_DEPSTRUCT; /* significant bits in color channels */
-#endif
-
-#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \
-defined(PNG_READ_BACKGROUND_SUPPORTED)
- /* The tRNS chunk supplies transparency data for paletted images and
- * other image types that don't need a full alpha channel. There are
- * "num_trans" transparency values for a paletted image, stored in the
- * same order as the palette colors, starting from index 0. Values
- * for the data are in the range [0, 255], ranging from fully transparent
- * to fully opaque, respectively. For non-paletted images, there is a
- * single color specified that should be treated as fully transparent.
- * Data is valid if (valid & PNG_INFO_tRNS) is non-zero.
- */
- png_bytep trans_alpha PNG_DEPSTRUCT; /* alpha values for paletted
- image */
- png_color_16 trans_color PNG_DEPSTRUCT; /* transparent color for
- non-palette image */
-#endif
-
-#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- /* The bKGD chunk gives the suggested image background color if the
- * display program does not have its own background color and the image
- * is needs to composited onto a background before display. The colors
- * in "background" are normally in the same color space/depth as the
- * pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero.
- */
- png_color_16 background PNG_DEPSTRUCT;
-#endif
-
-#ifdef PNG_oFFs_SUPPORTED
- /* The oFFs chunk gives the offset in "offset_unit_type" units rightwards
- * and downwards from the top-left corner of the display, page, or other
- * application-specific co-ordinate space. See the PNG_OFFSET_ defines
- * below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero.
- */
- png_int_32 x_offset PNG_DEPSTRUCT; /* x offset on page */
- png_int_32 y_offset PNG_DEPSTRUCT; /* y offset on page */
- png_byte offset_unit_type PNG_DEPSTRUCT; /* offset units type */
-#endif
-
-#ifdef PNG_pHYs_SUPPORTED
- /* The pHYs chunk gives the physical pixel density of the image for
- * display or printing in "phys_unit_type" units (see PNG_RESOLUTION_
- * defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero.
- */
- png_uint_32 x_pixels_per_unit PNG_DEPSTRUCT; /* horizontal pixel density */
- png_uint_32 y_pixels_per_unit PNG_DEPSTRUCT; /* vertical pixel density */
- png_byte phys_unit_type PNG_DEPSTRUCT; /* resolution type (see
- PNG_RESOLUTION_ below) */
-#endif
-
-#ifdef PNG_hIST_SUPPORTED
- /* The hIST chunk contains the relative frequency or importance of the
- * various palette entries, so that a viewer can intelligently select a
- * reduced-color palette, if required. Data is an array of "num_palette"
- * values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST)
- * is non-zero.
- */
- png_uint_16p hist PNG_DEPSTRUCT;
-#endif
-
-#ifdef PNG_cHRM_SUPPORTED
- /* The cHRM chunk describes the CIE color characteristics of the monitor
- * on which the PNG was created. This data allows the viewer to do gamut
- * mapping of the input image to ensure that the viewer sees the same
- * colors in the image as the creator. Values are in the range
- * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero.
- */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- float x_white PNG_DEPSTRUCT;
- float y_white PNG_DEPSTRUCT;
- float x_red PNG_DEPSTRUCT;
- float y_red PNG_DEPSTRUCT;
- float x_green PNG_DEPSTRUCT;
- float y_green PNG_DEPSTRUCT;
- float x_blue PNG_DEPSTRUCT;
- float y_blue PNG_DEPSTRUCT;
-#endif
-#endif
-
-#ifdef PNG_pCAL_SUPPORTED
- /* The pCAL chunk describes a transformation between the stored pixel
- * values and original physical data values used to create the image.
- * The integer range [0, 2^bit_depth - 1] maps to the floating-point
- * range given by [pcal_X0, pcal_X1], and are further transformed by a
- * (possibly non-linear) transformation function given by "pcal_type"
- * and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_
- * defines below, and the PNG-Group's PNG extensions document for a
- * complete description of the transformations and how they should be
- * implemented, and for a description of the ASCII parameter strings.
- * Data values are valid if (valid & PNG_INFO_pCAL) non-zero.
- */
- png_charp pcal_purpose PNG_DEPSTRUCT; /* pCAL chunk description string */
- png_int_32 pcal_X0 PNG_DEPSTRUCT; /* minimum value */
- png_int_32 pcal_X1 PNG_DEPSTRUCT; /* maximum value */
- png_charp pcal_units PNG_DEPSTRUCT; /* Latin-1 string giving physical
- units */
- png_charpp pcal_params PNG_DEPSTRUCT; /* ASCII strings containing
- parameter values */
- png_byte pcal_type PNG_DEPSTRUCT; /* equation type
- (see PNG_EQUATION_ below) */
- png_byte pcal_nparams PNG_DEPSTRUCT; /* number of parameters given
- in pcal_params */
-#endif
-
-/* New members added in libpng-1.0.6 */
- png_uint_32 free_me PNG_DEPSTRUCT; /* flags items libpng is
- responsible for freeing */
-
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
- defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
- /* Storage for unknown chunks that the library doesn't recognize. */
- png_unknown_chunkp unknown_chunks PNG_DEPSTRUCT;
- png_size_t unknown_chunks_num PNG_DEPSTRUCT;
-#endif
-
-#ifdef PNG_iCCP_SUPPORTED
- /* iCCP chunk data. */
- png_charp iccp_name PNG_DEPSTRUCT; /* profile name */
- png_charp iccp_profile PNG_DEPSTRUCT; /* International Color Consortium
- profile data */
- /* Note to maintainer: should be png_bytep */
- png_uint_32 iccp_proflen PNG_DEPSTRUCT; /* ICC profile data length */
- png_byte iccp_compression PNG_DEPSTRUCT; /* Always zero */
-#endif
-
-#ifdef PNG_sPLT_SUPPORTED
- /* Data on sPLT chunks (there may be more than one). */
- png_sPLT_tp splt_palettes PNG_DEPSTRUCT;
- png_uint_32 splt_palettes_num PNG_DEPSTRUCT;
-#endif
-
-#ifdef PNG_sCAL_SUPPORTED
- /* The sCAL chunk describes the actual physical dimensions of the
- * subject matter of the graphic. The chunk contains a unit specification
- * a byte value, and two ASCII strings representing floating-point
- * values. The values are width and height corresponsing to one pixel
- * in the image. This external representation is converted to double
- * here. Data values are valid if (valid & PNG_INFO_sCAL) is non-zero.
- */
- png_byte scal_unit PNG_DEPSTRUCT; /* unit of physical scale */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- double scal_pixel_width PNG_DEPSTRUCT; /* width of one pixel */
- double scal_pixel_height PNG_DEPSTRUCT; /* height of one pixel */
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
- png_charp scal_s_width PNG_DEPSTRUCT; /* string containing height */
- png_charp scal_s_height PNG_DEPSTRUCT; /* string containing width */
-#endif
-#endif
-
-#ifdef PNG_INFO_IMAGE_SUPPORTED
- /* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS)
- non-zero */
- /* Data valid if (valid & PNG_INFO_IDAT) non-zero */
- png_bytepp row_pointers PNG_DEPSTRUCT; /* the image bits */
-#endif
-
-#if defined(PNG_FIXED_POINT_SUPPORTED) && defined(PNG_gAMA_SUPPORTED)
- png_fixed_point int_gamma PNG_DEPSTRUCT; /* gamma of image,
- if (valid & PNG_INFO_gAMA) */
-#endif
-
-#if defined(PNG_cHRM_SUPPORTED) && defined(PNG_FIXED_POINT_SUPPORTED)
- png_fixed_point int_x_white PNG_DEPSTRUCT;
- png_fixed_point int_y_white PNG_DEPSTRUCT;
- png_fixed_point int_x_red PNG_DEPSTRUCT;
- png_fixed_point int_y_red PNG_DEPSTRUCT;
- png_fixed_point int_x_green PNG_DEPSTRUCT;
- png_fixed_point int_y_green PNG_DEPSTRUCT;
- png_fixed_point int_x_blue PNG_DEPSTRUCT;
- png_fixed_point int_y_blue PNG_DEPSTRUCT;
-#endif
-
-} png_info;
-
+typedef struct png_info_def png_info;
typedef png_info FAR * png_infop;
+typedef PNG_CONST png_info FAR * png_const_infop;
typedef png_info FAR * FAR * png_infopp;
/* Maximum positive integer used in PNG is (2^31)-1 */
#define PNG_UINT_32_MAX ((png_uint_32)(-1))
#define PNG_SIZE_MAX ((png_size_t)(-1))
+/* These are constants for fixed point values encoded in the
+ * PNG specification manner (x100000)
+ */
+#define PNG_FP_1 100000
+#define PNG_FP_HALF 50000
+
/* These describe the color_type field in png_info. */
/* color type masks */
#define PNG_COLOR_MASK_PALETTE 1
*/
typedef struct png_row_info_struct
{
- png_uint_32 width; /* width of row */
- png_size_t rowbytes; /* number of bytes in row */
- png_byte color_type; /* color type of row */
- png_byte bit_depth; /* bit depth of row */
- png_byte channels; /* number of channels (1, 2, 3, or 4) */
+ png_uint_32 width; /* width of row */
+ png_size_t rowbytes; /* number of bytes in row */
+ png_byte color_type; /* color type of row */
+ png_byte bit_depth; /* bit depth of row */
+ png_byte channels; /* number of channels (1, 2, 3, or 4) */
png_byte pixel_depth; /* bits per pixel (depth * channels) */
} png_row_info;
* that allow the user to override the default I/O functions with his or her
* own. The png_error_ptr type should match that of user-supplied warning
* and error functions, while the png_rw_ptr type should match that of the
- * user read/write data functions.
+ * user read/write data functions. Note that the 'write' function must not
+ * modify the buffer it is passed. The 'read' function, on the other hand, is
+ * expected to return the read data in the buffer.
*/
typedef struct png_struct_def png_struct;
+typedef PNG_CONST png_struct FAR * png_const_structp;
typedef png_struct FAR * png_structp;
-typedef void (PNGAPI *png_error_ptr) PNGARG((png_structp, png_const_charp));
-typedef void (PNGAPI *png_rw_ptr) PNGARG((png_structp, png_bytep, png_size_t));
-typedef void (PNGAPI *png_flush_ptr) PNGARG((png_structp));
-typedef void (PNGAPI *png_read_status_ptr) PNGARG((png_structp, png_uint_32,
- int));
-typedef void (PNGAPI *png_write_status_ptr) PNGARG((png_structp, png_uint_32,
- int));
+typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp));
+typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t));
+typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp));
+typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32,
+ int));
+typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32,
+ int));
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-typedef void (PNGAPI *png_progressive_info_ptr) PNGARG((png_structp,
- png_infop));
-typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop));
-typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep,
- png_uint_32, int));
+typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop));
+typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop));
+
+/* The following callback receives png_uint_32 row_number, int pass for the
+ * png_bytep data of the row. When transforming an interlaced image the
+ * row number is the row number within the sub-image of the interlace pass, so
+ * the value will increase to the height of the sub-image (not the full image)
+ * then reset to 0 for the next pass.
+ *
+ * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to
+ * find the output pixel (x,y) given an interlaced sub-image pixel
+ * (row,col,pass). (See below for these macros.)
+ */
+typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp, png_bytep,
+ png_uint_32, int));
#endif
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-typedef void (PNGAPI *png_user_transform_ptr) PNGARG((png_structp,
- png_row_infop, png_bytep));
+typedef PNG_CALLBACK(void, *png_user_transform_ptr, (png_structp, png_row_infop,
+ png_bytep));
#endif
#ifdef PNG_USER_CHUNKS_SUPPORTED
-typedef int (PNGAPI *png_user_chunk_ptr) PNGARG((png_structp,
- png_unknown_chunkp));
+typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp,
+ png_unknown_chunkp));
#endif
#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
-typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp));
+typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp));
#endif
+
#ifdef PNG_SETJMP_SUPPORTED
/* This must match the function definition in <setjmp.h>, and the
* application must include this before png.h to obtain the definition
- * of jmp_buf.
+ * of jmp_buf. The function is required to be PNG_NORETURN. (Note that
+ * PNG_PTR_NORETURN is used here because current versions of the Microsoft
+ * C compiler do not support the PNG_NORETURN attribute on a pointer.)
+ *
+ * If you get a type warning from the compiler when linking against this line
+ * then your compiler has 'longjmp' that does not match the requirements of the
+ * compiler that built libpng. You will have to write a wrapper function for
+ * your compiler's longjmp and call png_set_longjmp_fn directly (not via the
+ * png_jmpbuf macro.)
+ *
+ * If you get a warning here while building the library you will need to make
+ * changes to ensure that pnglibconf.h records the calling convention used by
+ * your compiler. This may be very difficult - try using a different compiler
+ * to build the library!
*/
-typedef void (PNGAPI *png_longjmp_ptr) PNGARG((jmp_buf, int));
+typedef PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)),
+ PNG_PTR_NORETURN);
#endif
/* Transform masks for the high-level interface */
#define PNG_FLAG_MNG_FILTER_64 0x04
#define PNG_ALL_MNG_FEATURES 0x05
-typedef png_voidp (*png_malloc_ptr) PNGARG((png_structp, png_alloc_size_t));
-typedef void (*png_free_ptr) PNGARG((png_structp, png_voidp));
-
-/* The structure that holds the information to read and write PNG files.
- * The only people who need to care about what is inside of this are the
- * people who will be modifying the library for their own special needs.
- * It should NOT be accessed directly by an application, except to store
- * the jmp_buf.
+/* NOTE: prior to 1.5 these functions had no 'API' style declaration,
+ * this allowed the zlib default functions to be used on Windows
+ * platforms. In 1.5 the zlib default malloc (which just calls malloc and
+ * ignores the first argument) should be completely compatible with the
+ * following.
*/
-
-struct png_struct_def
-{
-#ifdef PNG_SETJMP_SUPPORTED
- jmp_buf jmpbuf PNG_DEPSTRUCT; /* used in png_error */
- png_longjmp_ptr longjmp_fn PNG_DEPSTRUCT;/* setjmp non-local goto
- function. */
-#endif
- png_error_ptr error_fn PNG_DEPSTRUCT; /* function for printing
- errors and aborting */
- png_error_ptr warning_fn PNG_DEPSTRUCT; /* function for printing
- warnings */
- png_voidp error_ptr PNG_DEPSTRUCT; /* user supplied struct for
- error functions */
- png_rw_ptr write_data_fn PNG_DEPSTRUCT; /* function for writing
- output data */
- png_rw_ptr read_data_fn PNG_DEPSTRUCT; /* function for reading
- input data */
- png_voidp io_ptr PNG_DEPSTRUCT; /* ptr to application struct
- for I/O functions */
-
-#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
- png_user_transform_ptr read_user_transform_fn PNG_DEPSTRUCT; /* user read
- transform */
-#endif
-
-#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
- png_user_transform_ptr write_user_transform_fn PNG_DEPSTRUCT; /* user write
- transform */
-#endif
-
-/* These were added in libpng-1.0.2 */
-#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
- png_voidp user_transform_ptr PNG_DEPSTRUCT; /* user supplied struct
- for user transform */
- png_byte user_transform_depth PNG_DEPSTRUCT; /* bit depth of user
- transformed pixels */
- png_byte user_transform_channels PNG_DEPSTRUCT; /* channels in user
- transformed pixels */
-#endif
-#endif
-
- png_uint_32 mode PNG_DEPSTRUCT; /* tells us where we are in
- the PNG file */
- png_uint_32 flags PNG_DEPSTRUCT; /* flags indicating various
- things to libpng */
- png_uint_32 transformations PNG_DEPSTRUCT; /* which transformations
- to perform */
-
- z_stream zstream PNG_DEPSTRUCT; /* pointer to decompression
- structure (below) */
- png_bytep zbuf PNG_DEPSTRUCT; /* buffer for zlib */
- png_size_t zbuf_size PNG_DEPSTRUCT; /* size of zbuf */
- int zlib_level PNG_DEPSTRUCT; /* holds zlib compression level */
- int zlib_method PNG_DEPSTRUCT; /* holds zlib compression method */
- int zlib_window_bits PNG_DEPSTRUCT; /* holds zlib compression window
- bits */
- int zlib_mem_level PNG_DEPSTRUCT; /* holds zlib compression memory
- level */
- int zlib_strategy PNG_DEPSTRUCT; /* holds zlib compression
- strategy */
-
- png_uint_32 width PNG_DEPSTRUCT; /* width of image in pixels */
- png_uint_32 height PNG_DEPSTRUCT; /* height of image in pixels */
- png_uint_32 num_rows PNG_DEPSTRUCT; /* number of rows in current pass */
- png_uint_32 usr_width PNG_DEPSTRUCT; /* width of row at start of write */
- png_size_t rowbytes PNG_DEPSTRUCT; /* size of row in bytes */
-#if 0 /* Replaced with the following in libpng-1.4.1 */
- png_size_t irowbytes PNG_DEPSTRUCT;
-#endif
-/* Added in libpng-1.4.1 */
-#ifdef PNG_USER_LIMITS_SUPPORTED
- /* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk
- * can occupy when decompressed. 0 means unlimited.
- * We will change the typedef from png_size_t to png_alloc_size_t
- * in libpng-1.6.0
- */
- png_alloc_size_t user_chunk_malloc_max PNG_DEPSTRUCT;
-#endif
- png_uint_32 iwidth PNG_DEPSTRUCT; /* width of current interlaced
- row in pixels */
- png_uint_32 row_number PNG_DEPSTRUCT; /* current row in interlace pass */
- png_bytep prev_row PNG_DEPSTRUCT; /* buffer to save previous
- (unfiltered) row */
- png_bytep row_buf PNG_DEPSTRUCT; /* buffer to save current
- (unfiltered) row */
- png_bytep sub_row PNG_DEPSTRUCT; /* buffer to save "sub" row
- when filtering */
- png_bytep up_row PNG_DEPSTRUCT; /* buffer to save "up" row
- when filtering */
- png_bytep avg_row PNG_DEPSTRUCT; /* buffer to save "avg" row
- when filtering */
- png_bytep paeth_row PNG_DEPSTRUCT; /* buffer to save "Paeth" row
- when filtering */
- png_row_info row_info PNG_DEPSTRUCT; /* used for transformation
- routines */
-
- png_uint_32 idat_size PNG_DEPSTRUCT; /* current IDAT size for read */
- png_uint_32 crc PNG_DEPSTRUCT; /* current chunk CRC value */
- png_colorp palette PNG_DEPSTRUCT; /* palette from the input file */
- png_uint_16 num_palette PNG_DEPSTRUCT; /* number of color entries in
- palette */
- png_uint_16 num_trans PNG_DEPSTRUCT; /* number of transparency values */
- png_byte chunk_name[5] PNG_DEPSTRUCT; /* null-terminated name of current
- chunk */
- png_byte compression PNG_DEPSTRUCT; /* file compression type
- (always 0) */
- png_byte filter PNG_DEPSTRUCT; /* file filter type (always 0) */
- png_byte interlaced PNG_DEPSTRUCT; /* PNG_INTERLACE_NONE,
- PNG_INTERLACE_ADAM7 */
- png_byte pass PNG_DEPSTRUCT; /* current interlace pass (0 - 6) */
- png_byte do_filter PNG_DEPSTRUCT; /* row filter flags (see
- PNG_FILTER_ below ) */
- png_byte color_type PNG_DEPSTRUCT; /* color type of file */
- png_byte bit_depth PNG_DEPSTRUCT; /* bit depth of file */
- png_byte usr_bit_depth PNG_DEPSTRUCT; /* bit depth of users row */
- png_byte pixel_depth PNG_DEPSTRUCT; /* number of bits per pixel */
- png_byte channels PNG_DEPSTRUCT; /* number of channels in file */
- png_byte usr_channels PNG_DEPSTRUCT; /* channels at start of write */
- png_byte sig_bytes PNG_DEPSTRUCT; /* magic bytes read/written from
- start of file */
-
-#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
- png_uint_16 filler PNG_DEPSTRUCT; /* filler bytes for pixel
- expansion */
-#endif
-
-#ifdef PNG_bKGD_SUPPORTED
- png_byte background_gamma_type PNG_DEPSTRUCT;
-# ifdef PNG_FLOATING_POINT_SUPPORTED
- float background_gamma PNG_DEPSTRUCT;
-# endif
- png_color_16 background PNG_DEPSTRUCT; /* background color in
- screen gamma space */
-#ifdef PNG_READ_GAMMA_SUPPORTED
- png_color_16 background_1 PNG_DEPSTRUCT; /* background normalized
- to gamma 1.0 */
-#endif
-#endif /* PNG_bKGD_SUPPORTED */
-
-#ifdef PNG_WRITE_FLUSH_SUPPORTED
- png_flush_ptr output_flush_fn PNG_DEPSTRUCT; /* Function for flushing
- output */
- png_uint_32 flush_dist PNG_DEPSTRUCT; /* how many rows apart to flush,
- 0 - no flush */
- png_uint_32 flush_rows PNG_DEPSTRUCT; /* number of rows written since
- last flush */
-#endif
-
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- int gamma_shift PNG_DEPSTRUCT; /* number of "insignificant" bits
- 16-bit gamma */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- float gamma PNG_DEPSTRUCT; /* file gamma value */
- float screen_gamma PNG_DEPSTRUCT; /* screen gamma value
- (display_exponent) */
-#endif
-#endif
-
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- png_bytep gamma_table PNG_DEPSTRUCT; /* gamma table for 8-bit
- depth files */
- png_bytep gamma_from_1 PNG_DEPSTRUCT; /* converts from 1.0 to screen */
- png_bytep gamma_to_1 PNG_DEPSTRUCT; /* converts from file to 1.0 */
- png_uint_16pp gamma_16_table PNG_DEPSTRUCT; /* gamma table for 16-bit
- depth files */
- png_uint_16pp gamma_16_from_1 PNG_DEPSTRUCT; /* converts from 1.0 to
- screen */
- png_uint_16pp gamma_16_to_1 PNG_DEPSTRUCT; /* converts from file to 1.0 */
-#endif
-
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED)
- png_color_8 sig_bit PNG_DEPSTRUCT; /* significant bits in each
- available channel */
-#endif
-
-#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
- png_color_8 shift PNG_DEPSTRUCT; /* shift for significant bit
- tranformation */
-#endif
-
-#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \
- || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- png_bytep trans_alpha PNG_DEPSTRUCT; /* alpha values for
- paletted files */
- png_color_16 trans_color PNG_DEPSTRUCT; /* transparent color for
- non-paletted files */
-#endif
-
- png_read_status_ptr read_row_fn PNG_DEPSTRUCT; /* called after each
- row is decoded */
- png_write_status_ptr write_row_fn PNG_DEPSTRUCT; /* called after each
- row is encoded */
-#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
- png_progressive_info_ptr info_fn PNG_DEPSTRUCT; /* called after header
- data fully read */
- png_progressive_row_ptr row_fn PNG_DEPSTRUCT; /* called after each
- prog. row is decoded */
- png_progressive_end_ptr end_fn PNG_DEPSTRUCT; /* called after image
- is complete */
- png_bytep save_buffer_ptr PNG_DEPSTRUCT; /* current location in
- save_buffer */
- png_bytep save_buffer PNG_DEPSTRUCT; /* buffer for previously
- read data */
- png_bytep current_buffer_ptr PNG_DEPSTRUCT; /* current location in
- current_buffer */
- png_bytep current_buffer PNG_DEPSTRUCT; /* buffer for recently
- used data */
- png_uint_32 push_length PNG_DEPSTRUCT; /* size of current input
- chunk */
- png_uint_32 skip_length PNG_DEPSTRUCT; /* bytes to skip in
- input data */
- png_size_t save_buffer_size PNG_DEPSTRUCT; /* amount of data now
- in save_buffer */
- png_size_t save_buffer_max PNG_DEPSTRUCT; /* total size of
- save_buffer */
- png_size_t buffer_size PNG_DEPSTRUCT; /* total amount of
- available input data */
- png_size_t current_buffer_size PNG_DEPSTRUCT; /* amount of data now
- in current_buffer */
- int process_mode PNG_DEPSTRUCT; /* what push library
- is currently doing */
- int cur_palette PNG_DEPSTRUCT; /* current push library
- palette index */
-
-# ifdef PNG_TEXT_SUPPORTED
- png_size_t current_text_size PNG_DEPSTRUCT; /* current size of
- text input data */
- png_size_t current_text_left PNG_DEPSTRUCT; /* how much text left
- to read in input */
- png_charp current_text PNG_DEPSTRUCT; /* current text chunk
- buffer */
- png_charp current_text_ptr PNG_DEPSTRUCT; /* current location
- in current_text */
-# endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */
-
-#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
-
-#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
-/* For the Borland special 64K segment handler */
- png_bytepp offset_table_ptr PNG_DEPSTRUCT;
- png_bytep offset_table PNG_DEPSTRUCT;
- png_uint_16 offset_table_number PNG_DEPSTRUCT;
- png_uint_16 offset_table_count PNG_DEPSTRUCT;
- png_uint_16 offset_table_count_free PNG_DEPSTRUCT;
-#endif
-
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
- png_bytep palette_lookup PNG_DEPSTRUCT; /* lookup table for quantizing */
- png_bytep quantize_index PNG_DEPSTRUCT; /* index translation for palette
- files */
-#endif
-
-#if defined(PNG_READ_QUANTIZE_SUPPORTED) || defined(PNG_hIST_SUPPORTED)
- png_uint_16p hist PNG_DEPSTRUCT; /* histogram */
-#endif
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- png_byte heuristic_method PNG_DEPSTRUCT; /* heuristic for row
- filter selection */
- png_byte num_prev_filters PNG_DEPSTRUCT; /* number of weights
- for previous rows */
- png_bytep prev_filters PNG_DEPSTRUCT; /* filter type(s) of
- previous row(s) */
- png_uint_16p filter_weights PNG_DEPSTRUCT; /* weight(s) for previous
- line(s) */
- png_uint_16p inv_filter_weights PNG_DEPSTRUCT; /* 1/weight(s) for
- previous line(s) */
- png_uint_16p filter_costs PNG_DEPSTRUCT; /* relative filter
- calculation cost */
- png_uint_16p inv_filter_costs PNG_DEPSTRUCT; /* 1/relative filter
- calculation cost */
-#endif
-
-#ifdef PNG_TIME_RFC1123_SUPPORTED
- png_charp time_buffer PNG_DEPSTRUCT; /* String to hold RFC 1123 time text */
-#endif
-
-/* New members added in libpng-1.0.6 */
-
- png_uint_32 free_me PNG_DEPSTRUCT; /* flags items libpng is
- responsible for freeing */
-
-#ifdef PNG_USER_CHUNKS_SUPPORTED
- png_voidp user_chunk_ptr PNG_DEPSTRUCT;
- png_user_chunk_ptr read_user_chunk_fn PNG_DEPSTRUCT; /* user read
- chunk handler */
-#endif
-
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- int num_chunk_list PNG_DEPSTRUCT;
- png_bytep chunk_list PNG_DEPSTRUCT;
-#endif
-
-/* New members added in libpng-1.0.3 */
-#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
- png_byte rgb_to_gray_status PNG_DEPSTRUCT;
- /* These were changed from png_byte in libpng-1.0.6 */
- png_uint_16 rgb_to_gray_red_coeff PNG_DEPSTRUCT;
- png_uint_16 rgb_to_gray_green_coeff PNG_DEPSTRUCT;
- png_uint_16 rgb_to_gray_blue_coeff PNG_DEPSTRUCT;
-#endif
-
-/* New member added in libpng-1.0.4 (renamed in 1.0.9) */
-#if defined(PNG_MNG_FEATURES_SUPPORTED) || \
- defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
- defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
-/* Changed from png_byte to png_uint_32 at version 1.2.0 */
- png_uint_32 mng_features_permitted PNG_DEPSTRUCT;
-#endif
-
-/* New member added in libpng-1.0.7 */
-#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
- png_fixed_point int_gamma PNG_DEPSTRUCT;
-#endif
-
-/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */
-#ifdef PNG_MNG_FEATURES_SUPPORTED
- png_byte filter_type PNG_DEPSTRUCT;
-#endif
-
-/* New members added in libpng-1.2.0 */
-
-/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
-#ifdef PNG_USER_MEM_SUPPORTED
- png_voidp mem_ptr PNG_DEPSTRUCT; /* user supplied struct for
- mem functions */
- png_malloc_ptr malloc_fn PNG_DEPSTRUCT; /* function for
- allocating memory */
- png_free_ptr free_fn PNG_DEPSTRUCT; /* function for
- freeing memory */
-#endif
-
-/* New member added in libpng-1.0.13 and 1.2.0 */
- png_bytep big_row_buf PNG_DEPSTRUCT; /* buffer to save current
- (unfiltered) row */
-
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
-/* The following three members were added at version 1.0.14 and 1.2.4 */
- png_bytep quantize_sort PNG_DEPSTRUCT; /* working sort array */
- png_bytep index_to_palette PNG_DEPSTRUCT; /* where the original
- index currently is
- in the palette */
- png_bytep palette_to_index PNG_DEPSTRUCT; /* which original index
- points to this
- palette color */
-#endif
-
-/* New members added in libpng-1.0.16 and 1.2.6 */
- png_byte compression_type PNG_DEPSTRUCT;
-
-#ifdef PNG_USER_LIMITS_SUPPORTED
- png_uint_32 user_width_max PNG_DEPSTRUCT;
- png_uint_32 user_height_max PNG_DEPSTRUCT;
- /* Added in libpng-1.4.0: Total number of sPLT, text, and unknown
- * chunks that can be stored (0 means unlimited).
- */
- png_uint_32 user_chunk_cache_max PNG_DEPSTRUCT;
-#endif
-
-/* New member added in libpng-1.0.25 and 1.2.17 */
-#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
- /* Storage for unknown chunk that the library doesn't recognize. */
- png_unknown_chunk unknown_chunk PNG_DEPSTRUCT;
-#endif
-
-/* New members added in libpng-1.2.26 */
- png_uint_32 old_big_row_buf_size PNG_DEPSTRUCT;
- png_uint_32 old_prev_row_size PNG_DEPSTRUCT;
-
-/* New member added in libpng-1.2.30 */
- png_charp chunkdata PNG_DEPSTRUCT; /* buffer for reading chunk data */
-
-#ifdef PNG_IO_STATE_SUPPORTED
-/* New member added in libpng-1.4.0 */
- png_uint_32 io_state PNG_DEPSTRUCT;
-#endif
-};
-
-
-/* This triggers a compiler error in png.c, if png.c and png.h
- * do not agree upon the version number.
- */
-typedef png_structp version_1_4_4;
+typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp,
+ png_alloc_size_t));
+typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp));
typedef png_struct FAR * FAR * png_structpp;
-/* Here are the function definitions most commonly used. This is not
- * the place to find out how to use libpng. See libpng.txt for the
+/* Section 3: exported functions
+ * Here are the function definitions most commonly used. This is not
+ * the place to find out how to use libpng. See libpng-manual.txt for the
* full explanation, see example.c for the summary. This just provides
* a simple one line description of the use of each function.
+ *
+ * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in
+ * pngconf.h and in the *.dfn files in the scripts directory.
+ *
+ * PNG_EXPORT(ordinal, type, name, (args));
+ *
+ * ordinal: ordinal that is used while building
+ * *.def files. The ordinal value is only
+ * relevant when preprocessing png.h with
+ * the *.dfn files for building symbol table
+ * entries, and are removed by pngconf.h.
+ * type: return type of the function
+ * name: function name
+ * args: function arguments, with types
+ *
+ * When we wish to append attributes to a function prototype we use
+ * the PNG_EXPORTA() macro instead.
+ *
+ * PNG_EXPORTA(ordinal, type, name, (args), attributes);
+ *
+ * ordinal, type, name, and args: same as in PNG_EXPORT().
+ * attributes: function attributes
*/
/* Returns the version number of the library */
-PNG_EXPORT(png_uint_32,png_access_version_number) PNGARG((void));
+PNG_EXPORT(1, png_uint_32, png_access_version_number, (void));
/* Tell lib we have already handled the first <num_bytes> magic bytes.
* Handling more than 8 bytes from the beginning of the file is an error.
*/
-PNG_EXPORT(void,png_set_sig_bytes) PNGARG((png_structp png_ptr,
- int num_bytes));
+PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes));
/* Check sig[start] through sig[start + num_to_check - 1] to see if it's a
* PNG file. Returns zero if the supplied bytes match the 8-byte PNG
* signature, and non-zero otherwise. Having num_to_check == 0 or
* start > 7 will always fail (ie return non-zero).
*/
-PNG_EXPORT(int,png_sig_cmp) PNGARG((png_bytep sig, png_size_t start,
- png_size_t num_to_check));
+PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start,
+ png_size_t num_to_check));
/* Simple signature checking function. This is the same as calling
* png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n).
*/
-#define png_check_sig(sig,n) !png_sig_cmp((sig), 0, (n))
+#define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n))
/* Allocate and initialize png_ptr struct for reading, and any other memory. */
-PNG_EXPORT(png_structp,png_create_read_struct)
- PNGARG((png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn)) PNG_ALLOCATED;
+PNG_EXPORTA(4, png_structp, png_create_read_struct,
+ (png_const_charp user_png_ver, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warn_fn),
+ PNG_ALLOCATED);
/* Allocate and initialize png_ptr struct for writing, and any other memory */
-PNG_EXPORT(png_structp,png_create_write_struct)
- PNGARG((png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn)) PNG_ALLOCATED;
+PNG_EXPORTA(5, png_structp, png_create_write_struct,
+ (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
+ png_error_ptr warn_fn),
+ PNG_ALLOCATED);
-PNG_EXPORT(png_size_t,png_get_compression_buffer_size)
- PNGARG((png_structp png_ptr));
+PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size,
+ (png_const_structp png_ptr));
-PNG_EXPORT(void,png_set_compression_buffer_size)
- PNGARG((png_structp png_ptr, png_size_t size));
+PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr,
+ png_size_t size));
/* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp
* match up.
* allocated by the library - the call will return NULL on a mismatch
* indicating an ABI mismatch.
*/
-PNG_EXPORT(jmp_buf*, png_set_longjmp_fn)
- PNGARG((png_structp png_ptr, png_longjmp_ptr longjmp_fn, size_t
- jmp_buf_size));
+PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr,
+ png_longjmp_ptr longjmp_fn, size_t jmp_buf_size));
# define png_jmpbuf(png_ptr) \
- (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf)))
+ (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf)))
#else
# define png_jmpbuf(png_ptr) \
- (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP)
+ (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP)
#endif
+/* This function should be used by libpng applications in place of
+ * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it
+ * will use it; otherwise it will call PNG_ABORT(). This function was
+ * added in libpng-1.5.0.
+ */
+PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val),
+ PNG_NORETURN);
#ifdef PNG_READ_SUPPORTED
/* Reset the compression stream */
-PNG_EXPORT(int,png_reset_zstream) PNGARG((png_structp png_ptr));
+PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr));
#endif
/* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */
#ifdef PNG_USER_MEM_SUPPORTED
-PNG_EXPORT(png_structp,png_create_read_struct_2)
- PNGARG((png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
- png_malloc_ptr malloc_fn, png_free_ptr free_fn)) PNG_ALLOCATED;
-PNG_EXPORT(png_structp,png_create_write_struct_2)
- PNGARG((png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
- png_malloc_ptr malloc_fn, png_free_ptr free_fn)) PNG_ALLOCATED;
+PNG_EXPORTA(11, png_structp, png_create_read_struct_2,
+ (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
+ png_error_ptr warn_fn,
+ png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),
+ PNG_ALLOCATED);
+PNG_EXPORTA(12, png_structp, png_create_write_struct_2,
+ (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
+ png_error_ptr warn_fn,
+ png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn),
+ PNG_ALLOCATED);
#endif
/* Write the PNG file signature. */
-PNG_EXPORT(void,png_write_sig) PNGARG((png_structp png_ptr));
+PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr));
/* Write a PNG chunk - size, type, (optional) data, CRC. */
-PNG_EXPORT(void,png_write_chunk) PNGARG((png_structp png_ptr,
- png_bytep chunk_name, png_bytep data, png_size_t length));
+PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep
+ chunk_name, png_const_bytep data, png_size_t length));
/* Write the start of a PNG chunk - length and chunk name. */
-PNG_EXPORT(void,png_write_chunk_start) PNGARG((png_structp png_ptr,
- png_bytep chunk_name, png_uint_32 length));
+PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr,
+ png_const_bytep chunk_name, png_uint_32 length));
/* Write the data of a PNG chunk started with png_write_chunk_start(). */
-PNG_EXPORT(void,png_write_chunk_data) PNGARG((png_structp png_ptr,
- png_bytep data, png_size_t length));
+PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr,
+ png_const_bytep data, png_size_t length));
/* Finish a chunk started with png_write_chunk_start() (includes CRC). */
-PNG_EXPORT(void,png_write_chunk_end) PNGARG((png_structp png_ptr));
+PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr));
/* Allocate and initialize the info structure */
-PNG_EXPORT(png_infop,png_create_info_struct)
- PNGARG((png_structp png_ptr)) PNG_ALLOCATED;
+PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr),
+ PNG_ALLOCATED);
-PNG_EXPORT(void,png_info_init_3) PNGARG((png_infopp info_ptr,
+PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr,
png_size_t png_info_struct_size));
/* Writes all the PNG information before the image. */
-PNG_EXPORT(void,png_write_info_before_PLTE) PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-PNG_EXPORT(void,png_write_info) PNGARG((png_structp png_ptr,
- png_infop info_ptr));
+PNG_EXPORT(20, void, png_write_info_before_PLTE,
+ (png_structp png_ptr, png_infop info_ptr));
+PNG_EXPORT(21, void, png_write_info,
+ (png_structp png_ptr, png_infop info_ptr));
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
/* Read the information before the actual image data. */
-PNG_EXPORT(void,png_read_info) PNGARG((png_structp png_ptr,
- png_infop info_ptr));
+PNG_EXPORT(22, void, png_read_info,
+ (png_structp png_ptr, png_infop info_ptr));
#endif
#ifdef PNG_TIME_RFC1123_SUPPORTED
-PNG_EXPORT(png_charp,png_convert_to_rfc1123)
- PNGARG((png_structp png_ptr, png_timep ptime));
+PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123,
+ (png_structp png_ptr,
+ png_const_timep ptime));
#endif
#ifdef PNG_CONVERT_tIME_SUPPORTED
/* Convert from a struct tm to png_time */
-PNG_EXPORT(void,png_convert_from_struct_tm) PNGARG((png_timep ptime,
- struct tm FAR * ttime));
+PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime,
+ PNG_CONST struct tm FAR * ttime));
/* Convert from time_t to png_time. Uses gmtime() */
-PNG_EXPORT(void,png_convert_from_time_t) PNGARG((png_timep ptime,
- time_t ttime));
+PNG_EXPORT(25, void, png_convert_from_time_t,
+ (png_timep ptime, time_t ttime));
#endif /* PNG_CONVERT_tIME_SUPPORTED */
#ifdef PNG_READ_EXPAND_SUPPORTED
/* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */
-PNG_EXPORT(void,png_set_expand) PNGARG((png_structp png_ptr));
-PNG_EXPORT(void,png_set_expand_gray_1_2_4_to_8) PNGARG((png_structp
- png_ptr));
-PNG_EXPORT(void,png_set_palette_to_rgb) PNGARG((png_structp png_ptr));
-PNG_EXPORT(void,png_set_tRNS_to_alpha) PNGARG((png_structp png_ptr));
+PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr));
+PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr));
+PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr));
+PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr));
+#endif
+
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+/* Expand to 16 bit channels, forces conversion of palette to RGB and expansion
+ * of a tRNS chunk if present.
+ */
+PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr));
#endif
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
/* Use blue, green, red order for pixels. */
-PNG_EXPORT(void,png_set_bgr) PNGARG((png_structp png_ptr));
+PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr));
#endif
#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
/* Expand the grayscale to 24-bit RGB if necessary. */
-PNG_EXPORT(void,png_set_gray_to_rgb) PNGARG((png_structp png_ptr));
+PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr));
#endif
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
/* Reduce RGB to grayscale. */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr,
- int error_action, double red, double green ));
-#endif
-PNG_EXPORT(void,png_set_rgb_to_gray_fixed) PNGARG((png_structp png_ptr,
- int error_action, png_fixed_point red, png_fixed_point green ));
-PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_structp
- png_ptr));
+PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr,
+ int error_action, double red, double green));
+PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr,
+ int error_action, png_fixed_point red, png_fixed_point green));
+
+PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp
+ png_ptr));
#endif
-PNG_EXPORT(void,png_build_grayscale_palette) PNGARG((int bit_depth,
- png_colorp palette));
+PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth,
+ png_colorp palette));
#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
-PNG_EXPORT(void,png_set_strip_alpha) PNGARG((png_structp png_ptr));
+PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr));
#endif
#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
-PNG_EXPORT(void,png_set_swap_alpha) PNGARG((png_structp png_ptr));
+PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr));
#endif
#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
-PNG_EXPORT(void,png_set_invert_alpha) PNGARG((png_structp png_ptr));
+PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr));
#endif
#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
/* Add a filler byte to 8-bit Gray or 24-bit RGB images. */
-PNG_EXPORT(void,png_set_filler) PNGARG((png_structp png_ptr,
- png_uint_32 filler, int flags));
+PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler,
+ int flags));
/* The values of the PNG_FILLER_ defines should NOT be changed */
-#define PNG_FILLER_BEFORE 0
-#define PNG_FILLER_AFTER 1
+# define PNG_FILLER_BEFORE 0
+# define PNG_FILLER_AFTER 1
/* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */
-PNG_EXPORT(void,png_set_add_alpha) PNGARG((png_structp png_ptr,
- png_uint_32 filler, int flags));
+PNG_EXPORT(40, void, png_set_add_alpha,
+ (png_structp png_ptr, png_uint_32 filler,
+ int flags));
#endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
/* Swap bytes in 16-bit depth files. */
-PNG_EXPORT(void,png_set_swap) PNGARG((png_structp png_ptr));
+PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr));
#endif
#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
/* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */
-PNG_EXPORT(void,png_set_packing) PNGARG((png_structp png_ptr));
+PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr));
#endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED) || \
defined(PNG_WRITE_PACKSWAP_SUPPORTED)
/* Swap packing order of pixels in bytes. */
-PNG_EXPORT(void,png_set_packswap) PNGARG((png_structp png_ptr));
+PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr));
#endif
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
/* Converts files to legal bit depths. */
-PNG_EXPORT(void,png_set_shift) PNGARG((png_structp png_ptr,
- png_color_8p true_bits));
+PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p
+ true_bits));
#endif
#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
defined(PNG_WRITE_INTERLACING_SUPPORTED)
-/* Have the code handle the interlacing. Returns the number of passes. */
-PNG_EXPORT(int,png_set_interlace_handling) PNGARG((png_structp png_ptr));
+/* Have the code handle the interlacing. Returns the number of passes.
+ * MUST be called before png_read_update_info or png_start_read_image,
+ * otherwise it will not have the desired effect. Note that it is still
+ * necessary to call png_read_row or png_read_rows png_get_image_height
+ * times for each pass.
+*/
+PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr));
#endif
#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
/* Invert monochrome files */
-PNG_EXPORT(void,png_set_invert_mono) PNGARG((png_structp png_ptr));
+PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr));
#endif
#ifdef PNG_READ_BACKGROUND_SUPPORTED
/* Handle alpha and tRNS by replacing with a background color. */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(void,png_set_background) PNGARG((png_structp png_ptr,
- png_color_16p background_color, int background_gamma_code,
- int need_expand, double background_gamma));
+PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr,
+ png_const_color_16p background_color, int background_gamma_code,
+ int need_expand, double background_gamma));
+PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr,
+ png_const_color_16p background_color, int background_gamma_code,
+ int need_expand, png_fixed_point background_gamma));
#endif
-#define PNG_BACKGROUND_GAMMA_UNKNOWN 0
-#define PNG_BACKGROUND_GAMMA_SCREEN 1
-#define PNG_BACKGROUND_GAMMA_FILE 2
-#define PNG_BACKGROUND_GAMMA_UNIQUE 3
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+# define PNG_BACKGROUND_GAMMA_UNKNOWN 0
+# define PNG_BACKGROUND_GAMMA_SCREEN 1
+# define PNG_BACKGROUND_GAMMA_FILE 2
+# define PNG_BACKGROUND_GAMMA_UNIQUE 3
#endif
#ifdef PNG_READ_16_TO_8_SUPPORTED
/* Strip the second byte of information from a 16-bit depth file. */
-PNG_EXPORT(void,png_set_strip_16) PNGARG((png_structp png_ptr));
+PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr));
#endif
#ifdef PNG_READ_QUANTIZE_SUPPORTED
/* Turn on quantizing, and reduce the palette to the number of colors
- * available. Prior to libpng-1.4.2, this was png_set_dither().
+ * available.
*/
-PNG_EXPORT(void,png_set_quantize) PNGARG((png_structp png_ptr,
- png_colorp palette, int num_palette, int maximum_colors,
- png_uint_16p histogram, int full_quantize));
+PNG_EXPORT(49, void, png_set_quantize,
+ (png_structp png_ptr, png_colorp palette,
+ int num_palette, int maximum_colors, png_const_uint_16p histogram,
+ int full_quantize));
#endif
-/* This migration aid will be removed from libpng-1.5.0 */
-#define png_set_dither png_set_quantize
#ifdef PNG_READ_GAMMA_SUPPORTED
+/* The threshold on gamma processing is configurable but hard-wired into the
+ * library. The following is the floating point variant.
+ */
+#define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001)
+
/* Handle gamma correction. Screen_gamma=(display_exponent) */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr,
- double screen_gamma, double default_file_gamma));
-#endif
+PNG_FP_EXPORT(50, void, png_set_gamma,
+ (png_structp png_ptr, double screen_gamma,
+ double default_file_gamma));
+PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr,
+ png_fixed_point screen_gamma, png_fixed_point default_file_gamma));
#endif
-
#ifdef PNG_WRITE_FLUSH_SUPPORTED
/* Set how many lines between output flushes - 0 for no flushing */
-PNG_EXPORT(void,png_set_flush) PNGARG((png_structp png_ptr, int nrows));
+PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows));
/* Flush the current PNG output buffer */
-PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr));
+PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr));
#endif
/* Optional update palette with requested transformations */
-PNG_EXPORT(void,png_start_read_image) PNGARG((png_structp png_ptr));
+PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr));
/* Optional call to update the users info structure */
-PNG_EXPORT(void,png_read_update_info) PNGARG((png_structp png_ptr,
- png_infop info_ptr));
+PNG_EXPORT(54, void, png_read_update_info,
+ (png_structp png_ptr, png_infop info_ptr));
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
/* Read one or more rows of image data. */
-PNG_EXPORT(void,png_read_rows) PNGARG((png_structp png_ptr,
- png_bytepp row, png_bytepp display_row, png_uint_32 num_rows));
+PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row,
+ png_bytepp display_row, png_uint_32 num_rows));
#endif
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
/* Read a row of data. */
-PNG_EXPORT(void,png_read_row) PNGARG((png_structp png_ptr,
- png_bytep row,
- png_bytep display_row));
+PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row,
+ png_bytep display_row));
#endif
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
/* Read the whole image into memory at once. */
-PNG_EXPORT(void,png_read_image) PNGARG((png_structp png_ptr,
- png_bytepp image));
+PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image));
#endif
/* Write a row of image data */
-PNG_EXPORT(void,png_write_row) PNGARG((png_structp png_ptr,
- png_bytep row));
+PNG_EXPORT(58, void, png_write_row,
+ (png_structp png_ptr, png_const_bytep row));
-/* Write a few rows of image data */
-PNG_EXPORT(void,png_write_rows) PNGARG((png_structp png_ptr,
- png_bytepp row, png_uint_32 num_rows));
+/* Write a few rows of image data: (*row) is not written; however, the type
+ * is declared as writeable to maintain compatibility with previous versions
+ * of libpng and to allow the 'display_row' array from read_rows to be passed
+ * unchanged to write_rows.
+ */
+PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row,
+ png_uint_32 num_rows));
/* Write the image data */
-PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr,
- png_bytepp image));
+PNG_EXPORT(60, void, png_write_image,
+ (png_structp png_ptr, png_bytepp image));
/* Write the end of the PNG file. */
-PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr,
- png_infop info_ptr));
+PNG_EXPORT(61, void, png_write_end,
+ (png_structp png_ptr, png_infop info_ptr));
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
/* Read the end of the PNG file. */
-PNG_EXPORT(void,png_read_end) PNGARG((png_structp png_ptr,
- png_infop info_ptr));
+PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr));
#endif
/* Free any memory associated with the png_info_struct */
-PNG_EXPORT(void,png_destroy_info_struct) PNGARG((png_structp png_ptr,
- png_infopp info_ptr_ptr));
+PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr,
+ png_infopp info_ptr_ptr));
/* Free any memory associated with the png_struct and the png_info_structs */
-PNG_EXPORT(void,png_destroy_read_struct) PNGARG((png_structpp
- png_ptr_ptr, png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr));
+PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr,
+ png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr));
/* Free any memory associated with the png_struct and the png_info_structs */
-PNG_EXPORT(void,png_destroy_write_struct)
- PNGARG((png_structpp png_ptr_ptr, png_infopp info_ptr_ptr));
+PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr,
+ png_infopp info_ptr_ptr));
/* Set the libpng method of handling chunk CRC errors */
-PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr,
- int crit_action, int ancil_action));
+PNG_EXPORT(66, void, png_set_crc_action,
+ (png_structp png_ptr, int crit_action, int ancil_action));
-/* Values for png_set_crc_action() to say how to handle CRC errors in
+/* Values for png_set_crc_action() say how to handle CRC errors in
* ancillary and critical chunks, and whether to use the data contained
* therein. Note that it is impossible to "discard" data in a critical
* chunk. For versions prior to 0.90, the action was always error/quit,
/* Set the filtering method(s) used by libpng. Currently, the only valid
* value for "method" is 0.
*/
-PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method,
- int filters));
+PNG_EXPORT(67, void, png_set_filter,
+ (png_structp png_ptr, int method, int filters));
/* Flags for png_set_filter() to say which filters to use. The flags
* are chosen so that they don't conflict with real filter types
* the weights and costs are set to 1.0, this degenerates the WEIGHTED method
* to the UNWEIGHTED method, but with added encoding time/computation.
*/
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr,
- int heuristic_method, int num_weights, png_doublep filter_weights,
- png_doublep filter_costs));
-#endif
+PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr,
+ int heuristic_method, int num_weights, png_const_doublep filter_weights,
+ png_const_doublep filter_costs));
+PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed,
+ (png_structp png_ptr,
+ int heuristic_method, int num_weights, png_const_fixed_point_p
+ filter_weights, png_const_fixed_point_p filter_costs));
#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
/* Heuristic used for row filter selection. These defines should NOT be
* for PNG images, and do considerably fewer caclulations. In the future,
* these values may not correspond directly to the zlib compression levels.
*/
-PNG_EXPORT(void,png_set_compression_level) PNGARG((png_structp png_ptr,
- int level));
+PNG_EXPORT(69, void, png_set_compression_level,
+ (png_structp png_ptr, int level));
-PNG_EXPORT(void,png_set_compression_mem_level)
- PNGARG((png_structp png_ptr, int mem_level));
+PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr,
+ int mem_level));
-PNG_EXPORT(void,png_set_compression_strategy)
- PNGARG((png_structp png_ptr, int strategy));
+PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr,
+ int strategy));
-PNG_EXPORT(void,png_set_compression_window_bits)
- PNGARG((png_structp png_ptr, int window_bits));
+PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr,
+ int window_bits));
-PNG_EXPORT(void,png_set_compression_method) PNGARG((png_structp png_ptr,
- int method));
+PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr,
+ int method));
/* These next functions are called for input/output, memory, and error
* handling. They are in the file pngrio.c, pngwio.c, and pngerror.c,
* and call standard C I/O routines such as fread(), fwrite(), and
* fprintf(). These functions can be made to use other I/O routines
* at run time for those applications that need to handle I/O in a
- * different manner by calling png_set_???_fn(). See libpng.txt for
+ * different manner by calling png_set_???_fn(). See libpng-manual.txt for
* more information.
*/
#ifdef PNG_STDIO_SUPPORTED
/* Initialize the input/output for the PNG file to the default functions. */
-PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr,
- png_FILE_p fp));
+PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp));
#endif
/* Replace the (error and abort), and warning functions with user
* default function will be used.
*/
-PNG_EXPORT(void,png_set_error_fn) PNGARG((png_structp png_ptr,
- png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn));
+PNG_EXPORT(75, void, png_set_error_fn,
+ (png_structp png_ptr, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warning_fn));
/* Return the user pointer associated with the error functions */
-PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_structp png_ptr));
+PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr));
/* Replace the default data output functions with a user supplied one(s).
* If buffered output is not used, then output_flush_fn can be set to NULL.
* default flush function, which uses the standard *FILE structure, will
* be used.
*/
-PNG_EXPORT(void,png_set_write_fn) PNGARG((png_structp png_ptr,
- png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn));
+PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr,
+ png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn));
/* Replace the default data input function with a user supplied one. */
-PNG_EXPORT(void,png_set_read_fn) PNGARG((png_structp png_ptr,
- png_voidp io_ptr, png_rw_ptr read_data_fn));
+PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr,
+ png_rw_ptr read_data_fn));
/* Return the user pointer associated with the I/O functions */
-PNG_EXPORT(png_voidp,png_get_io_ptr) PNGARG((png_structp png_ptr));
+PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr));
-PNG_EXPORT(void,png_set_read_status_fn) PNGARG((png_structp png_ptr,
- png_read_status_ptr read_row_fn));
+PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr,
+ png_read_status_ptr read_row_fn));
-PNG_EXPORT(void,png_set_write_status_fn) PNGARG((png_structp png_ptr,
- png_write_status_ptr write_row_fn));
+PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr,
+ png_write_status_ptr write_row_fn));
#ifdef PNG_USER_MEM_SUPPORTED
/* Replace the default memory allocation functions with user supplied one(s). */
-PNG_EXPORT(void,png_set_mem_fn) PNGARG((png_structp png_ptr,
- png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn));
+PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr,
+ png_malloc_ptr malloc_fn, png_free_ptr free_fn));
/* Return the user pointer associated with the memory functions */
-PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((png_structp png_ptr));
+PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr));
#endif
#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
-PNG_EXPORT(void,png_set_read_user_transform_fn) PNGARG((png_structp
- png_ptr, png_user_transform_ptr read_user_transform_fn));
+PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr,
+ png_user_transform_ptr read_user_transform_fn));
#endif
#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
-PNG_EXPORT(void,png_set_write_user_transform_fn) PNGARG((png_structp
- png_ptr, png_user_transform_ptr write_user_transform_fn));
+PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr,
+ png_user_transform_ptr write_user_transform_fn));
#endif
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-PNG_EXPORT(void,png_set_user_transform_info) PNGARG((png_structp
- png_ptr, png_voidp user_transform_ptr, int user_transform_depth,
- int user_transform_channels));
+#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
+PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr,
+ png_voidp user_transform_ptr, int user_transform_depth,
+ int user_transform_channels));
/* Return the user pointer associated with the user transform functions */
-PNG_EXPORT(png_voidp,png_get_user_transform_ptr)
- PNGARG((png_structp png_ptr));
+PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr,
+ (png_const_structp png_ptr));
+#endif
+
+#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED
+/* Return information about the row currently being processed. Note that these
+ * APIs do not fail but will return unexpected results if called outside a user
+ * transform callback. Also note that when transforming an interlaced image the
+ * row number is the row number within the sub-image of the interlace pass, so
+ * the value will increase to the height of the sub-image (not the full image)
+ * then reset to 0 for the next pass.
+ *
+ * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to
+ * find the output pixel (x,y) given an interlaced sub-image pixel
+ * (row,col,pass). (See below for these macros.)
+ */
+PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp));
+PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp));
#endif
#ifdef PNG_USER_CHUNKS_SUPPORTED
-PNG_EXPORT(void,png_set_read_user_chunk_fn) PNGARG((png_structp png_ptr,
- png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn));
-PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((png_structp
- png_ptr));
+PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr,
+ png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn));
+PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr));
#endif
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
/* Sets the function callbacks for the push reader, and a pointer to a
* user-defined structure available to the callback functions.
*/
-PNG_EXPORT(void,png_set_progressive_read_fn) PNGARG((png_structp png_ptr,
- png_voidp progressive_ptr,
- png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
- png_progressive_end_ptr end_fn));
+PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr,
+ png_voidp progressive_ptr, png_progressive_info_ptr info_fn,
+ png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn));
/* Returns the user pointer associated with the push read functions */
-PNG_EXPORT(png_voidp,png_get_progressive_ptr)
- PNGARG((png_structp png_ptr));
+PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr));
/* Function to be called when data becomes available */
-PNG_EXPORT(void,png_process_data) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_bytep buffer, png_size_t buffer_size));
+PNG_EXPORT(92, void, png_process_data,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_bytep buffer, png_size_t buffer_size));
+
+/* A function which may be called *only* within png_process_data to stop the
+ * processing of any more data. The function returns the number of bytes
+ * remaining, excluding any that libpng has cached internally. A subsequent
+ * call to png_process_data must supply these bytes again. If the argument
+ * 'save' is set to true the routine will first save all the pending data and
+ * will always return 0.
+ */
+PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save));
-/* Function that combines rows. Not very much different than the
- * png_combine_row() call. Is this even used?????
+/* A function which may be called *only* outside (after) a call to
+ * png_process_data. It returns the number of bytes of data to skip in the
+ * input. Normally it will return 0, but if it returns a non-zero value the
+ * application must skip than number of bytes of input data and pass the
+ * following data to the next call to png_process_data.
*/
-PNG_EXPORT(void,png_progressive_combine_row) PNGARG((png_structp png_ptr,
- png_bytep old_row, png_bytep new_row));
+PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp));
+
+/* Function that combines rows. 'new_row' is a flag that should come from
+ * the callback and be non-NULL if anything needs to be done; the library
+ * stores its own version of the new data internally and ignores the passed
+ * in value.
+ */
+PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr,
+ png_bytep old_row, png_const_bytep new_row));
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
-PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr,
- png_alloc_size_t size)) PNG_ALLOCATED;
+PNG_EXPORTA(94, png_voidp, png_malloc,
+ (png_structp png_ptr, png_alloc_size_t size),
+ PNG_ALLOCATED);
/* Added at libpng version 1.4.0 */
-PNG_EXPORT(png_voidp,png_calloc) PNGARG((png_structp png_ptr,
- png_alloc_size_t size)) PNG_ALLOCATED;
+PNG_EXPORTA(95, png_voidp, png_calloc,
+ (png_structp png_ptr, png_alloc_size_t size),
+ PNG_ALLOCATED);
/* Added at libpng version 1.2.4 */
-PNG_EXPORT(png_voidp,png_malloc_warn) PNGARG((png_structp png_ptr,
- png_alloc_size_t size)) PNG_ALLOCATED;
+PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr,
+ png_alloc_size_t size), PNG_ALLOCATED);
/* Frees a pointer allocated by png_malloc() */
-PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr));
+PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr));
/* Free data that was allocated internally */
-PNG_EXPORT(void,png_free_data) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 free_me, int num));
+PNG_EXPORT(98, void, png_free_data,
+ (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num));
+
/* Reassign responsibility for freeing existing data, whether allocated
* by libpng or by the application */
-PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr,
- png_infop info_ptr, int freer, png_uint_32 mask));
+PNG_EXPORT(99, void, png_data_freer,
+ (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask));
+
/* Assignments for png_data_freer */
#define PNG_DESTROY_WILL_FREE_DATA 1
#define PNG_SET_WILL_FREE_DATA 1
#define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */
#ifdef PNG_USER_MEM_SUPPORTED
-PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr,
- png_alloc_size_t size)) PNG_ALLOCATED;
-PNG_EXPORT(void,png_free_default) PNGARG((png_structp png_ptr,
- png_voidp ptr));
+PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr,
+ png_alloc_size_t size), PNG_ALLOCATED);
+PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr));
#endif
-#ifndef PNG_NO_ERROR_TEXT
+#ifdef PNG_ERROR_TEXT_SUPPORTED
/* Fatal error in PNG image of libpng - can't continue */
-PNG_EXPORT(void,png_error) PNGARG((png_structp png_ptr,
- png_const_charp error_message)) PNG_NORETURN;
+PNG_EXPORTA(102, void, png_error,
+ (png_structp png_ptr, png_const_charp error_message),
+ PNG_NORETURN);
/* The same, but the chunk name is prepended to the error string. */
-PNG_EXPORT(void,png_chunk_error) PNGARG((png_structp png_ptr,
- png_const_charp error_message)) PNG_NORETURN;
+PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr,
+ png_const_charp error_message), PNG_NORETURN);
#else
/* Fatal error in PNG image of libpng - can't continue */
-PNG_EXPORT(void,png_err) PNGARG((png_structp png_ptr)) PNG_NORETURN;
+PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN);
#endif
/* Non-fatal error in libpng. Can continue, but may have a problem. */
-PNG_EXPORT(void,png_warning) PNGARG((png_structp png_ptr,
- png_const_charp warning_message));
+PNG_EXPORT(105, void, png_warning, (png_structp png_ptr,
+ png_const_charp warning_message));
/* Non-fatal error in libpng, chunk name is prepended to message. */
-PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr,
- png_const_charp warning_message));
+PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr,
+ png_const_charp warning_message));
#ifdef PNG_BENIGN_ERRORS_SUPPORTED
/* Benign error in libpng. Can continue, but may have a problem.
* User can choose whether to handle as a fatal error or as a warning. */
-PNG_EXPORT(void,png_benign_error) PNGARG((png_structp png_ptr,
- png_const_charp warning_message));
+# undef png_benign_error
+PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr,
+ png_const_charp warning_message));
/* Same, chunk name is prepended to message. */
-PNG_EXPORT(void,png_chunk_benign_error) PNGARG((png_structp png_ptr,
- png_const_charp warning_message));
+# undef png_chunk_benign_error
+PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr,
+ png_const_charp warning_message));
-PNG_EXPORT(void,png_set_benign_errors) PNGARG((png_structp
- png_ptr, int allowed));
+PNG_EXPORT(109, void, png_set_benign_errors,
+ (png_structp png_ptr, int allowed));
+#else
+# ifdef PNG_ALLOW_BENIGN_ERRORS
+# define png_benign_error png_warning
+# define png_chunk_benign_error png_chunk_warning
+# else
+# define png_benign_error png_error
+# define png_chunk_benign_error png_chunk_error
+# endif
#endif
/* The png_set_<chunk> functions are for storing values in the png_info_struct.
* png_info_struct.
*/
/* Returns "flag" if chunk data is valid in info_ptr. */
-PNG_EXPORT(png_uint_32,png_get_valid) PNGARG((png_structp png_ptr,
-png_infop info_ptr, png_uint_32 flag));
+PNG_EXPORT(110, png_uint_32, png_get_valid,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_32 flag));
/* Returns number of bytes needed to hold a transformed row. */
-PNG_EXPORT(png_size_t,png_get_rowbytes) PNGARG((png_structp png_ptr,
-png_infop info_ptr));
+PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
#ifdef PNG_INFO_IMAGE_SUPPORTED
/* Returns row_pointers, which is an array of pointers to scanlines that was
* returned from png_read_png().
*/
-PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((png_structp png_ptr,
-png_infop info_ptr));
+PNG_EXPORT(112, png_bytepp, png_get_rows,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
/* Set row_pointers, which is an array of pointers to scanlines for use
* by png_write_png().
*/
-PNG_EXPORT(void,png_set_rows) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_bytepp row_pointers));
+PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr,
+ png_infop info_ptr, png_bytepp row_pointers));
#endif
/* Returns number of color channels in image. */
-PNG_EXPORT(png_byte,png_get_channels) PNGARG((png_structp png_ptr,
-png_infop info_ptr));
+PNG_EXPORT(114, png_byte, png_get_channels,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
#ifdef PNG_EASY_ACCESS_SUPPORTED
/* Returns image width in pixels. */
-PNG_EXPORT(png_uint_32, png_get_image_width) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
+PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
/* Returns image height in pixels. */
-PNG_EXPORT(png_uint_32, png_get_image_height) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
+PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
/* Returns image bit_depth. */
-PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
+PNG_EXPORT(117, png_byte, png_get_bit_depth,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
/* Returns image color_type. */
-PNG_EXPORT(png_byte, png_get_color_type) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
+PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
/* Returns image filter_type. */
-PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
+PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
/* Returns image interlace_type. */
-PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
+PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
/* Returns image compression_type. */
-PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
+PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
/* Returns image resolution in pixels per meter, from pHYs chunk data. */
-PNG_EXPORT(png_uint_32, png_get_pixels_per_meter) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
-PNG_EXPORT(png_uint_32, png_get_x_pixels_per_meter) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
-PNG_EXPORT(png_uint_32, png_get_y_pixels_per_meter) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
+PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
/* Returns pixel aspect ratio, computed from pHYs chunk data. */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(float, png_get_pixel_aspect_ratio) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
-#endif
+PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
/* Returns image x, y offset in pixels or microns, from oFFs chunk data. */
-PNG_EXPORT(png_int_32, png_get_x_offset_pixels) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
-PNG_EXPORT(png_int_32, png_get_y_offset_pixels) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
-PNG_EXPORT(png_int_32, png_get_x_offset_microns) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
-PNG_EXPORT(png_int_32, png_get_y_offset_microns) PNGARG((png_structp
-png_ptr, png_infop info_ptr));
+PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(128, png_int_32, png_get_x_offset_microns,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+PNG_EXPORT(129, png_int_32, png_get_y_offset_microns,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
#endif /* PNG_EASY_ACCESS_SUPPORTED */
/* Returns pointer to signature string read from PNG header */
-PNG_EXPORT(png_bytep,png_get_signature) PNGARG((png_structp png_ptr,
-png_infop info_ptr));
+PNG_EXPORT(130, png_const_bytep, png_get_signature,
+ (png_const_structp png_ptr, png_infop info_ptr));
#ifdef PNG_bKGD_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_color_16p *background));
+PNG_EXPORT(131, png_uint_32, png_get_bKGD,
+ (png_const_structp png_ptr, png_infop info_ptr,
+ png_color_16p *background));
#endif
#ifdef PNG_bKGD_SUPPORTED
-PNG_EXPORT(void,png_set_bKGD) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_color_16p background));
+PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr,
+ png_const_color_16p background));
#endif
#ifdef PNG_cHRM_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_structp png_ptr,
- png_infop info_ptr, double *white_x, double *white_y, double *red_x,
- double *red_y, double *green_x, double *green_y, double *blue_x,
- double *blue_y));
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_cHRM_fixed) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_fixed_point *int_white_x, png_fixed_point
- *int_white_y, png_fixed_point *int_red_x, png_fixed_point *int_red_y,
- png_fixed_point *int_green_x, png_fixed_point *int_green_y, png_fixed_point
- *int_blue_x, png_fixed_point *int_blue_y));
+PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr,
+ png_const_infop info_ptr, double *white_x, double *white_y, double *red_x,
+ double *red_y, double *green_x, double *green_y, double *blue_x,
+ double *blue_y));
+#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */
+PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed,
+ (png_const_structp png_ptr,
+ png_const_infop info_ptr, png_fixed_point *int_white_x,
+ png_fixed_point *int_white_y, png_fixed_point *int_red_x,
+ png_fixed_point *int_red_y, png_fixed_point *int_green_x,
+ png_fixed_point *int_green_y, png_fixed_point *int_blue_x,
+ png_fixed_point *int_blue_y));
#endif
#endif
#ifdef PNG_cHRM_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(void,png_set_cHRM) PNGARG((png_structp png_ptr,
- png_infop info_ptr, double white_x, double white_y, double red_x,
- double red_y, double green_x, double green_y, double blue_x, double blue_y));
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
-PNG_EXPORT(void,png_set_cHRM_fixed) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_fixed_point int_white_x, png_fixed_point int_white_y,
- png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
- int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
- png_fixed_point int_blue_y));
-#endif
+PNG_FP_EXPORT(135, void, png_set_cHRM,
+ (png_structp png_ptr, png_infop info_ptr,
+ double white_x, double white_y, double red_x, double red_y, double green_x,
+ double green_y, double blue_x, double blue_y));
+PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr,
+ png_infop info_ptr, png_fixed_point int_white_x,
+ png_fixed_point int_white_y, png_fixed_point int_red_x,
+ png_fixed_point int_red_y, png_fixed_point int_green_x,
+ png_fixed_point int_green_y, png_fixed_point int_blue_x,
+ png_fixed_point int_blue_y));
#endif
#ifdef PNG_gAMA_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_structp png_ptr,
- png_infop info_ptr, double *file_gamma));
-#endif
-PNG_EXPORT(png_uint_32,png_get_gAMA_fixed) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_fixed_point *int_file_gamma));
+PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ double *file_gamma));
+PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_fixed_point *int_file_gamma));
#endif
#ifdef PNG_gAMA_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(void,png_set_gAMA) PNGARG((png_structp png_ptr,
- png_infop info_ptr, double file_gamma));
-#endif
-PNG_EXPORT(void,png_set_gAMA_fixed) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_fixed_point int_file_gamma));
+PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr,
+ png_infop info_ptr, double file_gamma));
+PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr,
+ png_infop info_ptr, png_fixed_point int_file_gamma));
#endif
#ifdef PNG_hIST_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_16p *hist));
+PNG_EXPORT(141, png_uint_32, png_get_hIST,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_16p *hist));
#endif
#ifdef PNG_hIST_SUPPORTED
-PNG_EXPORT(void,png_set_hIST) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_16p hist));
+PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr,
+ png_infop info_ptr, png_const_uint_16p hist));
#endif
-PNG_EXPORT(png_uint_32,png_get_IHDR) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 *width, png_uint_32 *height,
- int *bit_depth, int *color_type, int *interlace_method,
- int *compression_method, int *filter_method));
+PNG_EXPORT(143, png_uint_32, png_get_IHDR,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type,
+ int *interlace_method, int *compression_method, int *filter_method));
-PNG_EXPORT(void,png_set_IHDR) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth,
- int color_type, int interlace_method, int compression_method,
- int filter_method));
+PNG_EXPORT(144, void, png_set_IHDR,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 width, png_uint_32 height, int bit_depth, int color_type,
+ int interlace_method, int compression_method, int filter_method));
#ifdef PNG_oFFs_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_int_32 *offset_x, png_int_32 *offset_y,
- int *unit_type));
+PNG_EXPORT(145, png_uint_32, png_get_oFFs,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type));
#endif
#ifdef PNG_oFFs_SUPPORTED
-PNG_EXPORT(void,png_set_oFFs) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_int_32 offset_x, png_int_32 offset_y,
- int unit_type));
+PNG_EXPORT(146, void, png_set_oFFs,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_int_32 offset_x, png_int_32 offset_y, int unit_type));
#endif
#ifdef PNG_pCAL_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1,
- int *type, int *nparams, png_charp *units, png_charpp *params));
+PNG_EXPORT(147, png_uint_32, png_get_pCAL,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type,
+ int *nparams,
+ png_charp *units, png_charpp *params));
#endif
#ifdef PNG_pCAL_SUPPORTED
-PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1,
- int type, int nparams, png_charp units, png_charpp params));
+PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr,
+ png_infop info_ptr,
+ png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
+ int nparams, png_const_charp units, png_charpp params));
#endif
#ifdef PNG_pHYs_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
+PNG_EXPORT(149, png_uint_32, png_get_pHYs,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
#endif
#ifdef PNG_pHYs_SUPPORTED
-PNG_EXPORT(void,png_set_pHYs) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type));
+PNG_EXPORT(150, void, png_set_pHYs,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_uint_32 res_x, png_uint_32 res_y, int unit_type));
#endif
-PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_colorp *palette, int *num_palette));
+PNG_EXPORT(151, png_uint_32, png_get_PLTE,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_colorp *palette, int *num_palette));
-PNG_EXPORT(void,png_set_PLTE) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_colorp palette, int num_palette));
+PNG_EXPORT(152, void, png_set_PLTE,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_const_colorp palette, int num_palette));
#ifdef PNG_sBIT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_color_8p *sig_bit));
+PNG_EXPORT(153, png_uint_32, png_get_sBIT,
+ (png_const_structp png_ptr, png_infop info_ptr,
+ png_color_8p *sig_bit));
#endif
#ifdef PNG_sBIT_SUPPORTED
-PNG_EXPORT(void,png_set_sBIT) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_color_8p sig_bit));
+PNG_EXPORT(154, void, png_set_sBIT,
+ (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit));
#endif
#ifdef PNG_sRGB_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_structp png_ptr,
- png_infop info_ptr, int *intent));
+PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr,
+ png_const_infop info_ptr, int *file_srgb_intent));
#endif
#ifdef PNG_sRGB_SUPPORTED
-PNG_EXPORT(void,png_set_sRGB) PNGARG((png_structp png_ptr,
- png_infop info_ptr, int intent));
-PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM) PNGARG((png_structp png_ptr,
- png_infop info_ptr, int intent));
+PNG_EXPORT(156, void, png_set_sRGB,
+ (png_structp png_ptr, png_infop info_ptr, int srgb_intent));
+PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr,
+ png_infop info_ptr, int srgb_intent));
#endif
#ifdef PNG_iCCP_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_charpp name, int *compression_type,
- png_charpp profile, png_uint_32 *proflen));
- /* Note to maintainer: profile should be png_bytepp */
+PNG_EXPORT(158, png_uint_32, png_get_iCCP,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_charpp name, int *compression_type, png_bytepp profile,
+ png_uint_32 *proflen));
#endif
#ifdef PNG_iCCP_SUPPORTED
-PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_charp name, int compression_type,
- png_charp profile, png_uint_32 proflen));
- /* Note to maintainer: profile should be png_bytep */
+PNG_EXPORT(159, void, png_set_iCCP,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_const_charp name, int compression_type, png_const_bytep profile,
+ png_uint_32 proflen));
#endif
#ifdef PNG_sPLT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_sPLT_tpp entries));
+PNG_EXPORT(160, png_uint_32, png_get_sPLT,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_sPLT_tpp entries));
#endif
#ifdef PNG_sPLT_SUPPORTED
-PNG_EXPORT(void,png_set_sPLT) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_sPLT_tp entries, int nentries));
+PNG_EXPORT(161, void, png_set_sPLT,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_const_sPLT_tp entries, int nentries));
#endif
#ifdef PNG_TEXT_SUPPORTED
/* png_get_text also returns the number of text chunks in *num_text */
-PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_textp *text_ptr, int *num_text));
+PNG_EXPORT(162, png_uint_32, png_get_text,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_textp *text_ptr, int *num_text));
#endif
/* Note while png_set_text() will accept a structure whose text,
*/
#ifdef PNG_TEXT_SUPPORTED
-PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_textp text_ptr, int num_text));
+PNG_EXPORT(163, void, png_set_text,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_const_textp text_ptr, int num_text));
#endif
#ifdef PNG_tIME_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_timep *mod_time));
+PNG_EXPORT(164, png_uint_32, png_get_tIME,
+ (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time));
#endif
#ifdef PNG_tIME_SUPPORTED
-PNG_EXPORT(void,png_set_tIME) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_timep mod_time));
+PNG_EXPORT(165, void, png_set_tIME,
+ (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time));
#endif
#ifdef PNG_tRNS_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_bytep *trans_alpha, int *num_trans,
- png_color_16p *trans_color));
-#endif
-
-#ifdef PNG_tRNS_SUPPORTED
-PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_bytep trans_alpha, int num_trans,
- png_color_16p trans_color));
+PNG_EXPORT(166, png_uint_32, png_get_tRNS,
+ (png_const_structp png_ptr, png_infop info_ptr,
+ png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color));
#endif
#ifdef PNG_tRNS_SUPPORTED
+PNG_EXPORT(167, void, png_set_tRNS,
+ (png_structp png_ptr, png_infop info_ptr,
+ png_const_bytep trans_alpha, int num_trans,
+ png_const_color_16p trans_color));
#endif
#ifdef PNG_sCAL_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((png_structp png_ptr,
- png_infop info_ptr, int *unit, double *width, double *height));
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((png_structp png_ptr,
- png_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight));
-#endif
-#endif
+PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ int *unit, double *width, double *height));
+#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+/* NOTE: this API is currently implemented using floating point arithmetic,
+ * consequently it can only be used on systems with floating point support.
+ * In any case the range of values supported by png_fixed_point is small and it
+ * is highly recommended that png_get_sCAL_s be used instead.
+ */
+PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed,
+ (png_structp png_ptr, png_const_infop info_ptr, int *unit,
+ png_fixed_point *width,
+ png_fixed_point *height));
+#endif
+PNG_EXPORT(169, png_uint_32, png_get_sCAL_s,
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ int *unit, png_charpp swidth, png_charpp sheight));
+
+PNG_FP_EXPORT(170, void, png_set_sCAL,
+ (png_structp png_ptr, png_infop info_ptr,
+ int unit, double width, double height));
+PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr,
+ png_infop info_ptr, int unit, png_fixed_point width,
+ png_fixed_point height));
+PNG_EXPORT(171, void, png_set_sCAL_s,
+ (png_structp png_ptr, png_infop info_ptr,
+ int unit, png_const_charp swidth, png_const_charp sheight));
#endif /* PNG_sCAL_SUPPORTED */
-#ifdef PNG_sCAL_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_EXPORT(void,png_set_sCAL) PNGARG((png_structp png_ptr,
- png_infop info_ptr, int unit, double width, double height));
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
-PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr,
- png_infop info_ptr, int unit, png_charp swidth, png_charp sheight));
-#endif
-#endif
-#endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
-
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
/* Provide a list of chunks and how they are to be handled, if the built-in
handling or default unknown chunk handling is not desired. Any chunks not
= 2: keep only if safe-to-copy
= 3: keep even if unsafe-to-copy
*/
-PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp
- png_ptr, int keep, png_bytep chunk_list, int num_chunks));
-PNG_EXPORT(int,png_handle_as_unknown) PNGARG((png_structp png_ptr, png_bytep
- chunk_name));
+PNG_EXPORT(172, void, png_set_keep_unknown_chunks,
+ (png_structp png_ptr, int keep,
+ png_const_bytep chunk_list, int num_chunks));
+PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr,
+ png_const_bytep chunk_name));
#endif
#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
-PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns));
-PNG_EXPORT(void, png_set_unknown_chunk_location)
- PNGARG((png_structp png_ptr, png_infop info_ptr, int chunk, int location));
-PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp
- png_ptr, png_infop info_ptr, png_unknown_chunkpp entries));
+PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr,
+ png_infop info_ptr, png_const_unknown_chunkp unknowns,
+ int num_unknowns));
+PNG_EXPORT(175, void, png_set_unknown_chunk_location,
+ (png_structp png_ptr, png_infop info_ptr, int chunk, int location));
+PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr,
+ png_const_infop info_ptr, png_unknown_chunkpp entries));
#endif
/* Png_free_data() will turn off the "valid" flag for anything it frees.
* If you need to turn it off for a chunk that your application has freed,
* you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK);
*/
-PNG_EXPORT(void, png_set_invalid) PNGARG((png_structp png_ptr,
- png_infop info_ptr, int mask));
+PNG_EXPORT(177, void, png_set_invalid,
+ (png_structp png_ptr, png_infop info_ptr, int mask));
#ifdef PNG_INFO_IMAGE_SUPPORTED
/* The "params" pointer is currently not used and is for future expansion. */
-PNG_EXPORT(void, png_read_png) PNGARG((png_structp png_ptr,
- png_infop info_ptr,
- int transforms,
- png_voidp params));
-PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr,
- png_infop info_ptr,
- int transforms,
- png_voidp params));
-#endif
-
-PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_structp png_ptr));
-PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((png_structp png_ptr));
-PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp
- png_ptr));
-PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr));
+PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr,
+ int transforms, png_voidp params));
+PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr,
+ int transforms, png_voidp params));
+#endif
+
+PNG_EXPORT(180, png_const_charp, png_get_copyright,
+ (png_const_structp png_ptr));
+PNG_EXPORT(181, png_const_charp, png_get_header_ver,
+ (png_const_structp png_ptr));
+PNG_EXPORT(182, png_const_charp, png_get_header_version,
+ (png_const_structp png_ptr));
+PNG_EXPORT(183, png_const_charp, png_get_libpng_ver,
+ (png_const_structp png_ptr));
#ifdef PNG_MNG_FEATURES_SUPPORTED
-PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp
- png_ptr, png_uint_32 mng_features_permitted));
+PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr,
+ png_uint_32 mng_features_permitted));
#endif
/* For use in png_set_keep_unknown, added to version 1.2.6 */
* messages before passing them to the error or warning handler.
*/
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
-PNG_EXPORT(void,png_set_strip_error_numbers) PNGARG((png_structp
- png_ptr, png_uint_32 strip_mode));
+PNG_EXPORT(185, void, png_set_strip_error_numbers,
+ (png_structp png_ptr,
+ png_uint_32 strip_mode));
#endif
/* Added in libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
-PNG_EXPORT(void,png_set_user_limits) PNGARG((png_structp
- png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max));
-PNG_EXPORT(png_uint_32,png_get_user_width_max) PNGARG((png_structp
- png_ptr));
-PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp
- png_ptr));
+PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr,
+ png_uint_32 user_width_max, png_uint_32 user_height_max));
+PNG_EXPORT(187, png_uint_32, png_get_user_width_max,
+ (png_const_structp png_ptr));
+PNG_EXPORT(188, png_uint_32, png_get_user_height_max,
+ (png_const_structp png_ptr));
/* Added in libpng-1.4.0 */
-PNG_EXPORT(void,png_set_chunk_cache_max) PNGARG((png_structp
- png_ptr, png_uint_32 user_chunk_cache_max));
-PNG_EXPORT(png_uint_32,png_get_chunk_cache_max)
- PNGARG((png_structp png_ptr));
+PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr,
+ png_uint_32 user_chunk_cache_max));
+PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max,
+ (png_const_structp png_ptr));
/* Added in libpng-1.4.1 */
-PNG_EXPORT(void,png_set_chunk_malloc_max) PNGARG((png_structp
- png_ptr, png_alloc_size_t user_chunk_cache_max));
-PNG_EXPORT(png_alloc_size_t,png_get_chunk_malloc_max)
- PNGARG((png_structp png_ptr));
+PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr,
+ png_alloc_size_t user_chunk_cache_max));
+PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max,
+ (png_const_structp png_ptr));
#endif
-#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
-PNG_EXPORT(png_uint_32,png_get_pixels_per_inch) PNGARG((png_structp png_ptr,
-png_infop info_ptr));
+#if defined(PNG_INCH_CONVERSIONS_SUPPORTED)
+PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
-PNG_EXPORT(png_uint_32,png_get_x_pixels_per_inch) PNGARG((png_structp png_ptr,
-png_infop info_ptr));
+PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
-PNG_EXPORT(png_uint_32,png_get_y_pixels_per_inch) PNGARG((png_structp png_ptr,
-png_infop info_ptr));
+PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
-PNG_EXPORT(float,png_get_x_offset_inches) PNGARG((png_structp png_ptr,
-png_infop info_ptr));
+PNG_FP_EXPORT(196, float, png_get_x_offset_inches,
+ (png_const_structp png_ptr, png_const_infop info_ptr));
+#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
+PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed,
+ (png_structp png_ptr, png_const_infop info_ptr));
+#endif
-PNG_EXPORT(float,png_get_y_offset_inches) PNGARG((png_structp png_ptr,
-png_infop info_ptr));
+PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
+#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
+PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed,
+ (png_structp png_ptr, png_const_infop info_ptr));
+#endif
-#ifdef PNG_pHYs_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_pHYs_dpi) PNGARG((png_structp png_ptr,
-png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
-#endif /* PNG_pHYs_SUPPORTED */
-#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
+# ifdef PNG_pHYs_SUPPORTED
+PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr,
+ png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y,
+ int *unit_type));
+# endif /* PNG_pHYs_SUPPORTED */
+#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */
/* Added in libpng-1.4.0 */
#ifdef PNG_IO_STATE_SUPPORTED
-PNG_EXPORT(png_uint_32,png_get_io_state) PNGARG((png_structp png_ptr));
+PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr));
-PNG_EXPORT(png_bytep,png_get_io_chunk_name)
- PNGARG((png_structp png_ptr));
+PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name,
+ (png_structp png_ptr), PNG_DEPRECATED);
+PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type,
+ (png_const_structp png_ptr));
/* The flags returned by png_get_io_state() are the following: */
-#define PNG_IO_NONE 0x0000 /* no I/O at this moment */
-#define PNG_IO_READING 0x0001 /* currently reading */
-#define PNG_IO_WRITING 0x0002 /* currently writing */
-#define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */
-#define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */
-#define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */
-#define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */
-#define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */
-#define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */
+# define PNG_IO_NONE 0x0000 /* no I/O at this moment */
+# define PNG_IO_READING 0x0001 /* currently reading */
+# define PNG_IO_WRITING 0x0002 /* currently writing */
+# define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */
+# define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */
+# define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */
+# define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */
+# define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */
+# define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */
#endif /* ?PNG_IO_STATE_SUPPORTED */
-/* Maintainer: Put new public prototypes here ^, in libpng.3, and project
- * defs
+/* Interlace support. The following macros are always defined so that if
+ * libpng interlace handling is turned off the macros may be used to handle
+ * interlaced images within the application.
+ */
+#define PNG_INTERLACE_ADAM7_PASSES 7
+
+/* Two macros to return the first row and first column of the original,
+ * full, image which appears in a given pass. 'pass' is in the range 0
+ * to 6 and the result is in the range 0 to 7.
+ */
+#define PNG_PASS_START_ROW(pass) (((1U&~(pass))<<(3-((pass)>>1)))&7)
+#define PNG_PASS_START_COL(pass) (((1U& (pass))<<(3-(((pass)+1)>>1)))&7)
+
+/* Two macros to help evaluate the number of rows or columns in each
+ * pass. This is expressed as a shift - effectively log2 of the number or
+ * rows or columns in each 8x8 tile of the original image.
*/
+#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3)
+#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3)
+
+/* Hence two macros to determine the number of rows or columns in a given
+ * pass of an image given its height or width. In fact these macros may
+ * return non-zero even though the sub-image is empty, because the other
+ * dimension may be empty for a small image.
+ */
+#define PNG_PASS_ROWS(height, pass) (((height)+(((1<<PNG_PASS_ROW_SHIFT(pass))\
+ -1)-PNG_PASS_START_ROW(pass)))>>PNG_PASS_ROW_SHIFT(pass))
+#define PNG_PASS_COLS(width, pass) (((width)+(((1<<PNG_PASS_COL_SHIFT(pass))\
+ -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass))
+
+/* For the reader row callbacks (both progressive and sequential) it is
+ * necessary to find the row in the output image given a row in an interlaced
+ * image, so two more macros:
+ */
+#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \
+ (((yIn)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass))
+#define PNG_COL_FROM_PASS_COL(xIn, pass) \
+ (((xIn)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass))
+
+/* Two macros which return a boolean (0 or 1) saying whether the given row
+ * or column is in a particular pass. These use a common utility macro that
+ * returns a mask for a given pass - the offset 'off' selects the row or
+ * column version. The mask has the appropriate bit set for each column in
+ * the tile.
+ */
+#define PNG_PASS_MASK(pass,off) ( \
+ ((0x110145AFU>>(((7-(off))-(pass))<<2)) & 0xFU) | \
+ ((0x01145AF0U>>(((7-(off))-(pass))<<2)) & 0xF0U))
+
+#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \
+ ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1)
+#define PNG_COL_IN_INTERLACE_PASS(x, pass) \
+ ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1)
#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
/* With these routines we avoid an integer divide, which will be slower on
* [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ]
*/
- /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
+ /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
# define png_composite(composite, fg, alpha, bg) \
{ png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \
#else /* Standard method using integer division */
-# define png_composite(composite, fg, alpha, bg) \
- (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \
- (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
- (png_uint_16)127) / 255)
+# define png_composite(composite, fg, alpha, bg) \
+ (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \
+ (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
+ (png_uint_16)127) / 255)
# define png_composite_16(composite, fg, alpha, bg) \
(composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \
- (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \
- (png_uint_32)32767) / (png_uint_32)65535L)
+ (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \
+ (png_uint_32)32767) / (png_uint_32)65535L)
#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */
+#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED
+PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf));
+PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf));
+PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf));
+#endif
+
+PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr,
+ png_const_bytep buf));
+/* No png_get_int_16 -- may be added if there's a real need for it. */
+
+/* Place a 32-bit number into a buffer in PNG byte order (big-endian). */
+#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
+PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i));
+#endif
+#ifdef PNG_SAVE_INT_32_SUPPORTED
+PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i));
+#endif
+
+/* Place a 16-bit number into a buffer in PNG byte order.
+ * The parameter is declared unsigned int, not png_uint_16,
+ * just to avoid potential problems on pre-ANSI C compilers.
+ */
+#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
+PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i));
+/* No png_save_int_16 -- may be added if there's a real need for it. */
+#endif
+
#ifdef PNG_USE_READ_MACROS
/* Inline macros to do direct reads of bytes from the input buffer.
* The png_get_int_32() routine assumes we are using two's complement
((png_uint_32)(*((buf) + 1)) << 16) + \
((png_uint_32)(*((buf) + 2)) << 8) + \
((png_uint_32)(*((buf) + 3))))
+
+ /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the
+ * function) incorrectly returned a value of type png_uint_32.
+ */
# define png_get_uint_16(buf) \
- (((png_uint_32)(*(buf)) << 8) + \
- ((png_uint_32)(*((buf) + 1))))
+ ((png_uint_16) \
+ (((unsigned int)(*(buf)) << 8) + \
+ ((unsigned int)(*((buf) + 1)))))
+
# define png_get_int_32(buf) \
((png_int_32)((*(buf) & 0x80) \
- ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffff)+1)) \
+ ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \
: (png_int_32)png_get_uint_32(buf)))
-#else
-PNG_EXPORT(png_uint_32,png_get_uint_32) PNGARG((png_bytep buf));
-PNG_EXPORT(png_uint_16,png_get_uint_16) PNGARG((png_bytep buf));
-#ifdef PNG_GET_INT_32_SUPPORTED
-PNG_EXPORT(png_int_32,png_get_int_32) PNGARG((png_bytep buf));
-#endif
#endif
-PNG_EXPORT(png_uint_32,png_get_uint_31)
- PNGARG((png_structp png_ptr, png_bytep buf));
-/* No png_get_int_16 -- may be added if there's a real need for it. */
-
-/* Place a 32-bit number into a buffer in PNG byte order (big-endian). */
-PNG_EXPORT(void,png_save_uint_32)
- PNGARG((png_bytep buf, png_uint_32 i));
-PNG_EXPORT(void,png_save_int_32)
- PNGARG((png_bytep buf, png_int_32 i));
-/* Place a 16-bit number into a buffer in PNG byte order.
- * The parameter is declared unsigned int, not png_uint_16,
- * just to avoid potential problems on pre-ANSI C compilers.
+/* Maintainer: Put new public prototypes here ^, in libpng.3, and project
+ * defs
*/
-PNG_EXPORT(void,png_save_uint_16)
- PNGARG((png_bytep buf, unsigned int i));
-/* No png_save_int_16 -- may be added if there's a real need for it. */
-/* ************************************************************************* */
-
-/* Various modes of operation. Note that after an init, mode is set to
- * zero automatically when the structure is created.
+/* The last ordinal number (this is the *last* one already used; the next
+ * one to use is one more than this.) Maintainer, remember to add an entry to
+ * scripts/symbols.def as well.
*/
-#define PNG_HAVE_IHDR 0x01
-#define PNG_HAVE_PLTE 0x02
-#define PNG_HAVE_IDAT 0x04
-#define PNG_AFTER_IDAT 0x08 /* Have complete zlib datastream */
-#define PNG_HAVE_IEND 0x10
-#define PNG_HAVE_gAMA 0x20
-#define PNG_HAVE_cHRM 0x40
+#ifdef PNG_EXPORT_LAST_ORDINAL
+ PNG_EXPORT_LAST_ORDINAL(221);
+#endif
#ifdef __cplusplus
}
/* pngconf.h - machine configurable file for libpng
*
- * libpng version 1.4.4 - September 23, 2010
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * libpng version 1.5.2 - March 31, 2011
+ *
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
#ifndef PNGCONF_H
#define PNGCONF_H
-#ifndef PNG_NO_LIMITS_H
-# include <limits.h>
-#endif
-
-/* Added at libpng-1.2.9 */
-
-/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure"
- * script.
+#ifndef PNG_BUILDING_SYMBOL_TABLE
+/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C
+ * definition file for machine specific limits, this may impact the
+ * correctness of the definitons below (see uses of INT_MAX).
*/
-#ifdef PNG_CONFIGURE_LIBPNG
-# ifdef HAVE_CONFIG_H
-# include "config.h"
+# ifndef PNG_NO_LIMITS_H
+# include <limits.h>
# endif
-#endif
-/*
- * Added at libpng-1.2.8
- *
- * PNG_USER_CONFIG has to be defined on the compiler command line. This
- * includes the resource compiler for Windows DLL configurations.
+/* For the memory copy APIs (i.e. the standard definitions of these),
+ * because this file defines png_memcpy and so on the base APIs must
+ * be defined here.
*/
-#ifdef PNG_USER_CONFIG
-# include "pngusr.h"
-# ifndef PNG_USER_PRIVATEBUILD
-# define PNG_USER_PRIVATEBUILD
-# endif
-#endif
-
-/*
- * If you create a private DLL you should define in "pngusr.h" the following:
- * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
- * the DLL was built>
- * e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
- * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
- * distinguish your DLL from those of the official release. These
- * correspond to the trailing letters that come after the version
- * number and must match your private DLL name>
- * e.g. // private DLL "libpng14gx.dll"
- * #define PNG_USER_DLLFNAME_POSTFIX "gx"
- *
- * The following macros are also at your disposal if you want to complete the
- * DLL VERSIONINFO structure.
- * - PNG_USER_VERSIONINFO_COMMENTS
- * - PNG_USER_VERSIONINFO_COMPANYNAME
- * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
- */
-
-#ifdef __STDC__
-# ifdef SPECIALBUILD
-# pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\
- are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
-# endif
-
-# ifdef PRIVATEBUILD
-# pragma message("PRIVATEBUILD is deprecated.\
- Use PNG_USER_PRIVATEBUILD instead.")
-# define PNG_USER_PRIVATEBUILD PRIVATEBUILD
+# ifdef BSD
+# include <strings.h>
+# else
+# include <string.h>
# endif
-#endif /* __STDC__ */
-/* End of material added to libpng-1.2.8 */
-
-#ifndef PNG_VERSION_INFO_ONLY
-
-/* This is the size of the compression buffer, and thus the size of
- * an IDAT chunk. Make this whatever size you feel is best for your
- * machine. One of these will be allocated per png_struct. When this
- * is full, it writes the data to the disk, and does some other
- * calculations. Making this an extremely small size will slow
- * the library down, but you may want to experiment to determine
- * where it becomes significant, if you are concerned with memory
- * usage. Note that zlib allocates at least 32Kb also. For readers,
- * this describes the size of the buffer available to read the data in.
- * Unless this gets smaller than the size of a row (compressed),
- * it should not make much difference how big this is.
+/* For png_FILE_p - this provides the standard definition of a
+ * FILE
*/
-
-#ifndef PNG_ZBUF_SIZE
-# define PNG_ZBUF_SIZE 8192
-#endif
-
-/* Enable if you want a write-only libpng */
-
-#ifndef PNG_NO_READ_SUPPORTED
-# define PNG_READ_SUPPORTED
-#endif
-
-/* Enable if you want a read-only libpng */
-
-#ifndef PNG_NO_WRITE_SUPPORTED
-# define PNG_WRITE_SUPPORTED
-#endif
-
-/* Enabled in 1.4.0. */
-#ifdef PNG_ALLOW_BENIGN_ERRORS
-# define png_benign_error png_warning
-# define png_chunk_benign_error png_chunk_warning
-#else
-# ifndef PNG_BENIGN_ERRORS_SUPPORTED
-# define png_benign_error png_error
-# define png_chunk_benign_error png_chunk_error
-# endif
-#endif
-
-/* Added at libpng version 1.4.0 */
-#if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED)
-# define PNG_WARNINGS_SUPPORTED
-#endif
-
-/* Added at libpng version 1.4.0 */
-#if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED)
-# define PNG_ERROR_TEXT_SUPPORTED
-#endif
-
-/* Added at libpng version 1.4.0 */
-#if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED)
-# define PNG_CHECK_cHRM_SUPPORTED
-#endif
-
-/* Added at libpng version 1.4.0 */
-#if !defined(PNG_NO_ALIGNED_MEMORY) && !defined(PNG_ALIGNED_MEMORY_SUPPORTED)
-# define PNG_ALIGNED_MEMORY_SUPPORTED
-#endif
-
-/* Enabled by default in 1.2.0. You can disable this if you don't need to
- support PNGs that are embedded in MNG datastreams */
-#ifndef PNG_NO_MNG_FEATURES
-# ifndef PNG_MNG_FEATURES_SUPPORTED
-# define PNG_MNG_FEATURES_SUPPORTED
-# endif
-#endif
-
-/* Added at libpng version 1.4.0 */
-#ifndef PNG_NO_FLOATING_POINT_SUPPORTED
-# ifndef PNG_FLOATING_POINT_SUPPORTED
-# define PNG_FLOATING_POINT_SUPPORTED
+# ifdef PNG_STDIO_SUPPORTED
+# include <stdio.h>
# endif
#endif
-/* Added at libpng-1.4.0beta49 for testing (this test is no longer used
- in libpng and png_calloc() is always present)
- */
-#define PNG_CALLOC_SUPPORTED
-
-/* If you are running on a machine where you cannot allocate more
- * than 64K of memory at once, uncomment this. While libpng will not
- * normally need that much memory in a chunk (unless you load up a very
- * large file), zlib needs to know how big of a chunk it can use, and
- * libpng thus makes sure to check any memory allocation to verify it
- * will fit into memory.
-#define PNG_MAX_MALLOC_64K
+/* This controls optimization of the reading of 16 and 32 bit values
+ * from PNG files. It can be set on a per-app-file basis - it
+ * just changes whether a macro is used to the function is called.
+ * The library builder sets the default, if read functions are not
+ * built into the library the macro implementation is forced on.
*/
-#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
-# define PNG_MAX_MALLOC_64K
+#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
+# define PNG_USE_READ_MACROS
#endif
-
-/* Special munging to support doing things the 'cygwin' way:
- * 'Normal' png-on-win32 defines/defaults:
- * PNG_BUILD_DLL -- building dll
- * PNG_USE_DLL -- building an application, linking to dll
- * (no define) -- building static library, or building an
- * application and linking to the static lib
- * 'Cygwin' defines/defaults:
- * PNG_BUILD_DLL -- (ignored) building the dll
- * (no define) -- (ignored) building an application, linking to the dll
- * PNG_STATIC -- (ignored) building the static lib, or building an
- * application that links to the static lib.
- * ALL_STATIC -- (ignored) building various static libs, or building an
- * application that links to the static libs.
- * Thus,
- * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
- * this bit of #ifdefs will define the 'correct' config variables based on
- * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
- * unnecessary.
- *
- * Also, the precedence order is:
- * ALL_STATIC (since we can't #undef something outside our namespace)
- * PNG_BUILD_DLL
- * PNG_STATIC
- * (nothing) == PNG_USE_DLL
- *
- * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
- * of auto-import in binutils, we no longer need to worry about
- * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore,
- * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
- * to __declspec() stuff. However, we DO need to worry about
- * PNG_BUILD_DLL and PNG_STATIC because those change some defaults
- * such as CONSOLE_IO.
- */
-#ifdef __CYGWIN__
-# ifdef ALL_STATIC
-# ifdef PNG_BUILD_DLL
-# undef PNG_BUILD_DLL
-# endif
-# ifdef PNG_USE_DLL
-# undef PNG_USE_DLL
-# endif
-# ifdef PNG_DLL
-# undef PNG_DLL
-# endif
-# ifndef PNG_STATIC
-# define PNG_STATIC
-# endif
-# else
-# ifdef PNG_BUILD_DLL
-# ifdef PNG_STATIC
-# undef PNG_STATIC
-# endif
-# ifdef PNG_USE_DLL
-# undef PNG_USE_DLL
-# endif
-# ifndef PNG_DLL
-# define PNG_DLL
-# endif
-# else
-# ifdef PNG_STATIC
-# ifdef PNG_USE_DLL
-# undef PNG_USE_DLL
-# endif
-# ifdef PNG_DLL
-# undef PNG_DLL
-# endif
-# else
-# ifndef PNG_USE_DLL
-# define PNG_USE_DLL
-# endif
-# ifndef PNG_DLL
-# define PNG_DLL
-# endif
-# endif
-# endif
+#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
+# if PNG_DEFAULT_READ_MACROS
+# define PNG_USE_READ_MACROS
# endif
#endif
-/* This protects us against compilers that run on a windowing system
- * and thus don't have or would rather us not use the stdio types:
- * stdin, stdout, and stderr. The only one currently used is stderr
- * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will
- * prevent these from being compiled and used. #defining PNG_NO_STDIO
- * will also prevent these, plus will prevent the entire set of stdio
- * macros and functions (FILE *, printf, etc.) from being compiled and used,
- * unless (PNG_DEBUG > 0) has been #defined.
+/* COMPILER SPECIFIC OPTIONS.
*
- * #define PNG_NO_CONSOLE_IO
- * #define PNG_NO_STDIO
+ * These options are provided so that a variety of difficult compilers
+ * can be used. Some are fixed at build time (e.g. PNG_API_RULE
+ * below) but still have compiler specific implementations, others
+ * may be changed on a per-file basis when compiling against libpng.
*/
-#ifdef _WIN32_WCE
-# define PNG_NO_CONSOLE_IO
-# define PNG_NO_STDIO
-# define PNG_NO_TIME_RFC1123
-# ifdef PNG_DEBUG
-# undef PNG_DEBUG
-# endif
-#endif
-
-#if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED)
-# define PNG_STDIO_SUPPORTED
-#endif
-
-#ifdef PNG_BUILD_DLL
-# if !defined(PNG_CONSOLE_IO_SUPPORTED) && !defined(PNG_NO_CONSOLE_IO)
-# define PNG_NO_CONSOLE_IO
-# endif
-#endif
-
-# ifdef PNG_NO_STDIO
-# ifndef PNG_NO_CONSOLE_IO
-# define PNG_NO_CONSOLE_IO
-# endif
-# ifdef PNG_DEBUG
-# if (PNG_DEBUG > 0)
-# include <stdio.h>
-# endif
-# endif
-# else
-# include <stdio.h>
-# endif
-
-#if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED)
-# define PNG_CONSOLE_IO_SUPPORTED
-#endif
-
-/* This macro protects us against machines that don't have function
+/* The PNGARG macro protects us against machines that don't have function
* prototypes (ie K&R style headers). If your compiler does not handle
* function prototypes, define this macro and use the included ansi2knr.
* I've always been able to use _NO_PROTO as the indicator, but you may
*/
#ifndef PNGARG
-#ifdef OF /* zlib prototype munger */
-# define PNGARG(arglist) OF(arglist)
-#else
+# ifdef OF /* zlib prototype munger */
+# define PNGARG(arglist) OF(arglist)
+# else
-#ifdef _NO_PROTO
-# define PNGARG(arglist) ()
-#else
-# define PNGARG(arglist) arglist
-#endif /* _NO_PROTO */
+# ifdef _NO_PROTO
+# define PNGARG(arglist) ()
+# else
+# define PNGARG(arglist) arglist
+# endif /* _NO_PROTO */
-#endif /* OF */
+# endif /* OF */
#endif /* PNGARG */
-/* Try to determine if we are compiling on a Mac. Note that testing for
- * just __MWERKS__ is not good enough, because the Codewarrior is now used
- * on non-Mac platforms.
- */
-#ifndef MACOS
-# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
- defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
-# define MACOS
-# endif
-#endif
-
-/* Enough people need this for various reasons to include it here */
-#if !defined(MACOS) && !defined(RISCOS)
-# include <sys/types.h>
-#endif
-
-/* PNG_SETJMP_NOT_SUPPORTED and PNG_NO_SETJMP_SUPPORTED are deprecated. */
-#if !defined(PNG_NO_SETJMP) && \
- !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED)
-# define PNG_SETJMP_SUPPORTED
-#endif
-
-#ifdef PNG_SETJMP_SUPPORTED
-/* This is an attempt to force a single setjmp behaviour on Linux. If
- * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
+/* Function calling conventions.
+ * =============================
+ * Normally it is not necessary to specify to the compiler how to call
+ * a function - it just does it - however on x86 systems derived from
+ * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems
+ * and some others) there are multiple ways to call a function and the
+ * default can be changed on the compiler command line. For this reason
+ * libpng specifies the calling convention of every exported function and
+ * every function called via a user supplied function pointer. This is
+ * done in this file by defining the following macros:
*
- * You can bypass this test if you know that your application uses exactly
- * the same setjmp.h that was included when libpng was built. Only define
- * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
- * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
- * while building a separate libpng library for general use.
- */
-
-# ifndef PNG_SKIP_SETJMP_CHECK
-# ifdef __linux__
-# ifdef _BSD_SOURCE
-# define PNG_SAVE_BSD_SOURCE
-# undef _BSD_SOURCE
-# endif
-# ifdef _SETJMP_H
- /* If you encounter a compiler error here, see the explanation
- * near the end of INSTALL.
- */
- __pngconf.h__ in libpng already includes setjmp.h;
- __dont__ include it again.;
-# endif
-# endif /* __linux__ */
-# endif /* PNG_SKIP_SETJMP_CHECK */
-
- /* Include setjmp.h for error handling */
-# include <setjmp.h>
-
-# ifdef __linux__
-# ifdef PNG_SAVE_BSD_SOURCE
-# ifdef _BSD_SOURCE
-# undef _BSD_SOURCE
-# endif
-# define _BSD_SOURCE
-# undef PNG_SAVE_BSD_SOURCE
-# endif
-# endif /* __linux__ */
-#endif /* PNG_SETJMP_SUPPORTED */
-
-#ifdef BSD
-# include <strings.h>
-#else
-# include <string.h>
-#endif
-
-/* Other defines for things like memory and the like can go here. */
-
-/* This controls how fine the quantizing gets. As this allocates
- * a largish chunk of memory (32K), those who are not as concerned
- * with quantizing quality can decrease some or all of these.
- */
-
-/* Prior to libpng-1.4.2, these were PNG_DITHER_*_BITS
- * These migration aids will be removed from libpng-1.5.0.
- */
-#ifdef PNG_DITHER_RED_BITS
-# define PNG_QUANTIZE_RED_BITS PNG_DITHER_RED_BITS
-#endif
-#ifdef PNG_DITHER_GREEN_BITS
-# define PNG_QUANTIZE_GREEN_BITS PNG_DITHER_GREEN_BITS
-#endif
-#ifdef PNG_DITHER_BLUE_BITS
-# define PNG_QUANTIZE_BLUE_BITS PNG_DITHER_BLUE_BITS
-#endif
-
-#ifndef PNG_QUANTIZE_RED_BITS
-# define PNG_QUANTIZE_RED_BITS 5
-#endif
-#ifndef PNG_QUANTIZE_GREEN_BITS
-# define PNG_QUANTIZE_GREEN_BITS 5
-#endif
-#ifndef PNG_QUANTIZE_BLUE_BITS
-# define PNG_QUANTIZE_BLUE_BITS 5
-#endif
-
-/* This controls how fine the gamma correction becomes when you
- * are only interested in 8 bits anyway. Increasing this value
- * results in more memory being used, and more pow() functions
- * being called to fill in the gamma tables. Don't set this value
- * less then 8, and even that may not work (I haven't tested it).
- */
-
-#ifndef PNG_MAX_GAMMA_8
-# define PNG_MAX_GAMMA_8 11
-#endif
-
-/* This controls how much a difference in gamma we can tolerate before
- * we actually start doing gamma conversion.
- */
-#ifndef PNG_GAMMA_THRESHOLD
-# define PNG_GAMMA_THRESHOLD 0.05
-#endif
-
-/* The following uses const char * instead of char * for error
- * and warning message functions, so some compilers won't complain.
- * If you do not want to use const, define PNG_NO_CONST.
- */
-
-#ifndef PNG_CONST
-# ifndef PNG_NO_CONST
-# define PNG_CONST const
-# else
-# define PNG_CONST
+ * PNGAPI Calling convention for exported functions.
+ * PNGCBAPI Calling convention for user provided (callback) functions.
+ * PNGCAPI Calling convention used by the ANSI-C library (required
+ * for longjmp callbacks and sometimes used internally to
+ * specify the calling convention for zlib).
+ *
+ * These macros should never be overridden. If it is necessary to
+ * change calling convention in a private build this can be done
+ * by setting PNG_API_RULE (which defaults to 0) to one of the values
+ * below to select the correct 'API' variants.
+ *
+ * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout.
+ * This is correct in every known environment.
+ * PNG_API_RULE=1 Use the operating system convention for PNGAPI and
+ * the 'C' calling convention (from PNGCAPI) for
+ * callbacks (PNGCBAPI). This is no longer required
+ * in any known environment - if it has to be used
+ * please post an explanation of the problem to the
+ * libpng mailing list.
+ *
+ * These cases only differ if the operating system does not use the C
+ * calling convention, at present this just means the above cases
+ * (x86 DOS/Windows sytems) and, even then, this does not apply to
+ * Cygwin running on those systems.
+ *
+ * Note that the value must be defined in pnglibconf.h so that what
+ * the application uses to call the library matches the conventions
+ * set when building the library.
+ */
+
+/* Symbol export
+ * =============
+ * When building a shared library it is almost always necessary to tell
+ * the compiler which symbols to export. The png.h macro 'PNG_EXPORT'
+ * is used to mark the symbols. On some systems these symbols can be
+ * extracted at link time and need no special processing by the compiler,
+ * on other systems the symbols are flagged by the compiler and just
+ * the declaration requires a special tag applied (unfortunately) in a
+ * compiler dependent way. Some systems can do either.
+ *
+ * A small number of older systems also require a symbol from a DLL to
+ * be flagged to the program that calls it. This is a problem because
+ * we do not know in the header file included by application code that
+ * the symbol will come from a shared library, as opposed to a statically
+ * linked one. For this reason the application must tell us by setting
+ * the magic flag PNG_USE_DLL to turn on the special processing before
+ * it includes png.h.
+ *
+ * Four additional macros are used to make this happen:
+ *
+ * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from
+ * the build or imported if PNG_USE_DLL is set - compiler
+ * and system specific.
+ *
+ * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to
+ * 'type', compiler specific.
+ *
+ * PNG_DLL_EXPORT Set to the magic to use during a libpng build to
+ * make a symbol exported from the DLL.
+ *
+ * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come
+ * from a DLL - used to define PNG_IMPEXP when
+ * PNG_USE_DLL is set.
+ */
+
+/* System specific discovery.
+ * ==========================
+ * This code is used at build time to find PNG_IMPEXP, the API settings
+ * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
+ * import processing is possible. On Windows/x86 systems it also sets
+ * compiler-specific macros to the values required to change the calling
+ * conventions of the various functions.
+ */
+#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
+ defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\
+ ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\
+ defined(_M_X64) || defined(_M_IA64) )
+ /* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes
+ * builds under Cygwin or MinGW. Also includes Watcom builds but these need
+ * special treatment because they are not compatible with GCC or Visual C
+ * because of different calling conventions.
+ */
+# if PNG_API_RULE == 2
+ /* If this line results in an error, either because __watcall is not
+ * understood or because of a redefine just below you cannot use *this*
+ * build of the library with the compiler you are using. *This* build was
+ * build using Watcom and applications must also be built using Watcom!
+ */
+# define PNGCAPI __watcall
# endif
-#endif
-
-/* The following defines give you the ability to remove code from the
- * library that you will not be using. I wish I could figure out how to
- * automate this, but I can't do that without making it seriously hard
- * on the users. So if you are not using an ability, change the #define
- * to an #undef, or pass in PNG_NO_feature and that part of the library
- * will not be compiled.
-
- * If your linker can't find a function, you may want to make sure the
- * ability is defined here. Some of these depend upon some others being
- * defined. I haven't figured out all the interactions here, so you may
- * have to experiment awhile to get everything to compile. If you are
- * creating or using a shared library, you probably shouldn't touch this,
- * as it will affect the size of the structures, and this will cause bad
- * things to happen if the library and/or application ever change.
- */
-
-/* Any features you will not be using can be undef'ed here */
-
-/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
- * to turn it off with PNG_NO_READ|WRITE_TRANSFORMS on the compile line,
- * then pick and choose which ones to define without having to edit this
- * file. It is safe to use the PNG_NO_READ|WRITE_TRANSFORMS
- * if you only want to have a png-compliant reader/writer but don't need
- * any of the extra transformations. This saves about 80 kbytes in a
- * typical installation of the library. (PNG_NO_* form added in version
- * 1.0.1c, for consistency; PNG_*_TRANSFORMS_NOT_SUPPORTED deprecated in
- * 1.4.0)
- */
-
-/* Ignore attempt to turn off both floating and fixed point support */
-#if !defined(PNG_FLOATING_POINT_SUPPORTED) || \
- !defined(PNG_NO_FIXED_POINT_SUPPORTED)
-# define PNG_FIXED_POINT_SUPPORTED
-#endif
-
-#ifdef PNG_READ_SUPPORTED
-
-/* PNG_READ_TRANSFORMS_NOT_SUPPORTED is deprecated. */
-#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
- !defined(PNG_NO_READ_TRANSFORMS)
-# define PNG_READ_TRANSFORMS_SUPPORTED
-#endif
-#ifdef PNG_READ_TRANSFORMS_SUPPORTED
-# ifndef PNG_NO_READ_EXPAND
-# define PNG_READ_EXPAND_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_SHIFT
-# define PNG_READ_SHIFT_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_PACK
-# define PNG_READ_PACK_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_BGR
-# define PNG_READ_BGR_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_SWAP
-# define PNG_READ_SWAP_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_PACKSWAP
-# define PNG_READ_PACKSWAP_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_INVERT
-# define PNG_READ_INVERT_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_QUANTIZE
- /* Prior to libpng-1.4.0 this was PNG_READ_DITHER_SUPPORTED */
-# ifndef PNG_NO_READ_DITHER /* This migration aid will be removed */
-# define PNG_READ_QUANTIZE_SUPPORTED
+# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
+# define PNGCAPI __cdecl
+# if PNG_API_RULE == 1
+# define PNGAPI __stdcall
# endif
+# else
+ /* An older compiler, or one not detected (erroneously) above,
+ * if necessary override on the command line to get the correct
+ * variants for the compiler.
+ */
+# ifndef PNGCAPI
+# define PNGCAPI _cdecl
+# endif
+# if PNG_API_RULE == 1 && !defined(PNGAPI)
+# define PNGAPI _stdcall
+# endif
+# endif /* compiler/api */
+ /* NOTE: PNGCBAPI always defaults to PNGCAPI. */
+
+# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
+ ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed
# endif
-# ifndef PNG_NO_READ_BACKGROUND
-# define PNG_READ_BACKGROUND_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_16_TO_8
-# define PNG_READ_16_TO_8_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_FILLER
-# define PNG_READ_FILLER_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_GAMMA
-# define PNG_READ_GAMMA_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_GRAY_TO_RGB
-# define PNG_READ_GRAY_TO_RGB_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_SWAP_ALPHA
-# define PNG_READ_SWAP_ALPHA_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_INVERT_ALPHA
-# define PNG_READ_INVERT_ALPHA_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_STRIP_ALPHA
-# define PNG_READ_STRIP_ALPHA_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_USER_TRANSFORM
-# define PNG_READ_USER_TRANSFORM_SUPPORTED
-# endif
-# ifndef PNG_NO_READ_RGB_TO_GRAY
-# define PNG_READ_RGB_TO_GRAY_SUPPORTED
-# endif
-#endif /* PNG_READ_TRANSFORMS_SUPPORTED */
-
-/* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */
-#if !defined(PNG_NO_PROGRESSIVE_READ) && \
- !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */
-# define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */
-#endif /* about interlacing capability! You'll */
- /* still have interlacing unless you change the following define: */
-
-#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */
-
-/* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */
-#if !defined(PNG_NO_SEQUENTIAL_READ) && \
- !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \
- !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED)
-# define PNG_SEQUENTIAL_READ_SUPPORTED
-#endif
-
-#ifndef PNG_NO_READ_COMPOSITE_NODIV
-# ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */
-# define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */
-# endif
-#endif
-
-#if !defined(PNG_NO_GET_INT_32) || defined(PNG_READ_oFFS_SUPPORTED) || \
- defined(PNG_READ_pCAL_SUPPORTED)
-# ifndef PNG_GET_INT_32_SUPPORTED
-# define PNG_GET_INT_32_SUPPORTED
-# endif
-#endif
-
-#endif /* PNG_READ_SUPPORTED */
-
-#ifdef PNG_WRITE_SUPPORTED
-
-/* PNG_WRITE_TRANSFORMS_NOT_SUPPORTED is deprecated. */
-#if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
- !defined(PNG_NO_WRITE_TRANSFORMS)
-# define PNG_WRITE_TRANSFORMS_SUPPORTED
-#endif
-
-#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
-# ifndef PNG_NO_WRITE_SHIFT
-# define PNG_WRITE_SHIFT_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_PACK
-# define PNG_WRITE_PACK_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_BGR
-# define PNG_WRITE_BGR_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_SWAP
-# define PNG_WRITE_SWAP_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_PACKSWAP
-# define PNG_WRITE_PACKSWAP_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_INVERT
-# define PNG_WRITE_INVERT_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_FILLER
-# define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */
-# endif
-# ifndef PNG_NO_WRITE_SWAP_ALPHA
-# define PNG_WRITE_SWAP_ALPHA_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_INVERT_ALPHA
-# define PNG_WRITE_INVERT_ALPHA_SUPPORTED
-# endif
-# ifndef PNG_NO_WRITE_USER_TRANSFORM
-# define PNG_WRITE_USER_TRANSFORM_SUPPORTED
-# endif
-#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */
-
-#if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
- !defined(PNG_WRITE_INTERLACING_SUPPORTED)
- /* This is not required for PNG-compliant encoders, but can cause
- * trouble if left undefined
- */
-# define PNG_WRITE_INTERLACING_SUPPORTED
-#endif
-
-#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \
- !defined(PNG_WRITE_WEIGHTED_FILTER) && \
- defined(PNG_FLOATING_POINT_SUPPORTED)
-# define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
-#endif
-
-#ifndef PNG_NO_WRITE_FLUSH
-# define PNG_WRITE_FLUSH_SUPPORTED
-#endif
-
-#if !defined(PNG_NO_SAVE_INT_32) || defined(PNG_WRITE_oFFS_SUPPORTED) || \
- defined(PNG_WRITE_pCAL_SUPPORTED)
-# ifndef PNG_SAVE_INT_32_SUPPORTED
-# define PNG_SAVE_INT_32_SUPPORTED
-# endif
-#endif
-
-#endif /* PNG_WRITE_SUPPORTED */
-
-#define PNG_NO_ERROR_NUMBERS
-
-#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
- defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
-# ifndef PNG_NO_USER_TRANSFORM_PTR
-# define PNG_USER_TRANSFORM_PTR_SUPPORTED
-# endif
-#endif
-
-#if defined(PNG_STDIO_SUPPORTED) && !defined(PNG_TIME_RFC1123_SUPPORTED)
-# define PNG_TIME_RFC1123_SUPPORTED
-#endif
-
-/* This adds extra functions in pngget.c for accessing data from the
- * info pointer (added in version 0.99)
- * png_get_image_width()
- * png_get_image_height()
- * png_get_bit_depth()
- * png_get_color_type()
- * png_get_compression_type()
- * png_get_filter_type()
- * png_get_interlace_type()
- * png_get_pixel_aspect_ratio()
- * png_get_pixels_per_meter()
- * png_get_x_offset_pixels()
- * png_get_y_offset_pixels()
- * png_get_x_offset_microns()
- * png_get_y_offset_microns()
- */
-#if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED)
-# define PNG_EASY_ACCESS_SUPPORTED
-#endif
-
-/* Added at libpng-1.2.0 */
-#if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
-# define PNG_USER_MEM_SUPPORTED
-#endif
-
-/* Added at libpng-1.2.6 */
-#ifndef PNG_NO_SET_USER_LIMITS
-# ifndef PNG_SET_USER_LIMITS_SUPPORTED
-# define PNG_SET_USER_LIMITS_SUPPORTED
-# endif
- /* Feature added at libpng-1.4.0, this flag added at 1.4.1 */
-# ifndef PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
-# define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
-# endif
- /* Feature added at libpng-1.4.1, this flag added at 1.4.1 */
-# ifndef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
-# define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
-# endif
-#endif
-
-/* Added at libpng-1.2.43 */
-#ifndef PNG_USER_LIMITS_SUPPORTED
-# ifndef PNG_NO_USER_LIMITS
-# define PNG_USER_LIMITS_SUPPORTED
-# endif
-#endif
-
-/* Added at libpng-1.0.16 and 1.2.6. To accept all valid PNGs no matter
- * how large, set these two limits to 0x7fffffffL
- */
-#ifndef PNG_USER_WIDTH_MAX
-# define PNG_USER_WIDTH_MAX 1000000L
-#endif
-#ifndef PNG_USER_HEIGHT_MAX
-# define PNG_USER_HEIGHT_MAX 1000000L
-#endif
-
-/* Added at libpng-1.2.43. To accept all valid PNGs no matter
- * how large, set these two limits to 0.
- */
-#ifndef PNG_USER_CHUNK_CACHE_MAX
-# define PNG_USER_CHUNK_CACHE_MAX 0
-#endif
-
-/* Added at libpng-1.2.43 */
-#ifndef PNG_USER_CHUNK_MALLOC_MAX
-# define PNG_USER_CHUNK_MALLOC_MAX 0
-#endif
-
-/* Added at libpng-1.4.0 */
-#if !defined(PNG_NO_IO_STATE) && !defined(PNG_IO_STATE_SUPPORTED)
-# define PNG_IO_STATE_SUPPORTED
-#endif
-
-#ifndef PNG_LITERAL_SHARP
-# define PNG_LITERAL_SHARP 0x23
-#endif
-#ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
-# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
-#endif
-#ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
-# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
-#endif
-#ifndef PNG_STRING_NEWLINE
-#define PNG_STRING_NEWLINE "\n"
-#endif
-
-/* These are currently experimental features, define them if you want */
-
-/* Very little testing */
-/*
-#ifdef PNG_READ_SUPPORTED
-# ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
-# define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
-# endif
-#endif
-*/
-
-/* This is only for PowerPC big-endian and 680x0 systems */
-/* some testing */
-/*
-#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
-# define PNG_READ_BIG_ENDIAN_SUPPORTED
-#endif
-*/
-
-#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS)
-# define PNG_USE_READ_MACROS
-#endif
-
-/* Buggy compilers (e.g., gcc 2.7.2.2) need PNG_NO_POINTER_INDEXING */
-
-#if !defined(PNG_NO_POINTER_INDEXING) && \
- !defined(PNG_POINTER_INDEXING_SUPPORTED)
-# define PNG_POINTER_INDEXING_SUPPORTED
-#endif
-
-
-/* Any chunks you are not interested in, you can undef here. The
- * ones that allocate memory may be expecially important (hIST,
- * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info
- * a bit smaller.
- */
-
-/* The size of the png_text structure changed in libpng-1.0.6 when
- * iTXt support was added. iTXt support was turned off by default through
- * libpng-1.2.x, to support old apps that malloc the png_text structure
- * instead of calling png_set_text() and letting libpng malloc it. It
- * was turned on by default in libpng-1.4.0.
- */
-
-/* PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */
-#if defined(PNG_READ_SUPPORTED) && \
- !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
- !defined(PNG_NO_READ_ANCILLARY_CHUNKS)
-# define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
-#endif
-
-/* PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */
-#if defined(PNG_WRITE_SUPPORTED) && \
- !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
- !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS)
-# define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
-#endif
-
-#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
-
-#ifdef PNG_NO_READ_TEXT
-# define PNG_NO_READ_iTXt
-# define PNG_NO_READ_tEXt
-# define PNG_NO_READ_zTXt
-#endif
-
-#ifndef PNG_NO_READ_bKGD
-# define PNG_READ_bKGD_SUPPORTED
-# define PNG_bKGD_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_cHRM
-# define PNG_READ_cHRM_SUPPORTED
-# define PNG_cHRM_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_gAMA
-# define PNG_READ_gAMA_SUPPORTED
-# define PNG_gAMA_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_hIST
-# define PNG_READ_hIST_SUPPORTED
-# define PNG_hIST_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_iCCP
-# define PNG_READ_iCCP_SUPPORTED
-# define PNG_iCCP_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_iTXt
-# ifndef PNG_READ_iTXt_SUPPORTED
-# define PNG_READ_iTXt_SUPPORTED
-# endif
-# ifndef PNG_iTXt_SUPPORTED
-# define PNG_iTXt_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_READ_oFFs
-# define PNG_READ_oFFs_SUPPORTED
-# define PNG_oFFs_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_pCAL
-# define PNG_READ_pCAL_SUPPORTED
-# define PNG_pCAL_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_sCAL
-# define PNG_READ_sCAL_SUPPORTED
-# define PNG_sCAL_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_pHYs
-# define PNG_READ_pHYs_SUPPORTED
-# define PNG_pHYs_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_sBIT
-# define PNG_READ_sBIT_SUPPORTED
-# define PNG_sBIT_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_sPLT
-# define PNG_READ_sPLT_SUPPORTED
-# define PNG_sPLT_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_sRGB
-# define PNG_READ_sRGB_SUPPORTED
-# define PNG_sRGB_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_tEXt
-# define PNG_READ_tEXt_SUPPORTED
-# define PNG_tEXt_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_tIME
-# define PNG_READ_tIME_SUPPORTED
-# define PNG_tIME_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_tRNS
-# define PNG_READ_tRNS_SUPPORTED
-# define PNG_tRNS_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_zTXt
-# define PNG_READ_zTXt_SUPPORTED
-# define PNG_zTXt_SUPPORTED
-#endif
-#ifndef PNG_NO_READ_OPT_PLTE
-# define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
-#endif /* optional PLTE chunk in RGB and RGBA images */
-#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \
- defined(PNG_READ_zTXt_SUPPORTED)
-# define PNG_READ_TEXT_SUPPORTED
-# define PNG_TEXT_SUPPORTED
-#endif
-
-#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */
-
-#ifndef PNG_NO_READ_UNKNOWN_CHUNKS
-# ifndef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
-# define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
-# endif
-# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
-# define PNG_UNKNOWN_CHUNKS_SUPPORTED
-# endif
-# ifndef PNG_READ_USER_CHUNKS_SUPPORTED
-# define PNG_READ_USER_CHUNKS_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_READ_USER_CHUNKS
-# ifndef PNG_READ_USER_CHUNKS_SUPPORTED
-# define PNG_READ_USER_CHUNKS_SUPPORTED
-# endif
-# ifndef PNG_USER_CHUNKS_SUPPORTED
-# define PNG_USER_CHUNKS_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_HANDLE_AS_UNKNOWN
-# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-# endif
-#endif
-#ifdef PNG_WRITE_SUPPORTED
-#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
+# if (defined(_MSC_VER) && _MSC_VER < 800) ||\
+ (defined(__BORLANDC__) && __BORLANDC__ < 0x500)
+ /* older Borland and MSC
+ * compilers used '__export' and required this to be after
+ * the type.
+ */
+# ifndef PNG_EXPORT_TYPE
+# define PNG_EXPORT_TYPE(type) type PNG_IMPEXP
+# endif
+# define PNG_DLL_EXPORT __export
+# else /* newer compiler */
+# define PNG_DLL_EXPORT __declspec(dllexport)
+# ifndef PNG_DLL_IMPORT
+# define PNG_DLL_IMPORT __declspec(dllimport)
+# endif
+# endif /* compiler */
+
+#else /* !Windows/x86 */
+# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
+# define PNGAPI _System
+# else /* !Windows/x86 && !OS/2 */
+ /* Use the defaults, or define PNG*API on the command line (but
+ * this will have to be done for every compile!)
+ */
+# endif /* other system, !OS/2 */
+#endif /* !Windows/x86 */
-#ifdef PNG_NO_WRITE_TEXT
-# define PNG_NO_WRITE_iTXt
-# define PNG_NO_WRITE_tEXt
-# define PNG_NO_WRITE_zTXt
+/* Now do all the defaulting . */
+#ifndef PNGCAPI
+# define PNGCAPI
#endif
-#ifndef PNG_NO_WRITE_bKGD
-# define PNG_WRITE_bKGD_SUPPORTED
-# ifndef PNG_bKGD_SUPPORTED
-# define PNG_bKGD_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_cHRM
-# define PNG_WRITE_cHRM_SUPPORTED
-# ifndef PNG_cHRM_SUPPORTED
-# define PNG_cHRM_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_gAMA
-# define PNG_WRITE_gAMA_SUPPORTED
-# ifndef PNG_gAMA_SUPPORTED
-# define PNG_gAMA_SUPPORTED
-# endif
-#endif
-#ifndef PNG_NO_WRITE_hIST
-# define PNG_WRITE_hIST_SUPPORTED
-# ifndef PNG_hIST_SUPPORTED
-# define PNG_hIST_SUPPORTED
-# endif
+#ifndef PNGCBAPI
+# define PNGCBAPI PNGCAPI
#endif
-#ifndef PNG_NO_WRITE_iCCP
-# define PNG_WRITE_iCCP_SUPPORTED
-# ifndef PNG_iCCP_SUPPORTED
-# define PNG_iCCP_SUPPORTED
-# endif
+#ifndef PNGAPI
+# define PNGAPI PNGCAPI
#endif
-#ifndef PNG_NO_WRITE_iTXt
-# ifndef PNG_WRITE_iTXt_SUPPORTED
-# define PNG_WRITE_iTXt_SUPPORTED
-# endif
-# ifndef PNG_iTXt_SUPPORTED
-# define PNG_iTXt_SUPPORTED
+
+/* The default for PNG_IMPEXP depends on whether the library is
+ * being built or used.
+ */
+#ifndef PNG_IMPEXP
+# ifdef PNGLIB_BUILD
+ /* Building the library */
+# if (defined(DLL_EXPORT)/*from libtool*/ ||\
+ defined(_WINDLL) || defined(_DLL) || defined(__DLL__) ||\
+ defined(_USRDLL) ||\
+ defined(PNG_BUILD_DLL)) && defined(PNG_DLL_EXPORT)
+ /* Building a DLL. */
+# define PNG_IMPEXP PNG_DLL_EXPORT
+# endif /* DLL */
+# else
+ /* Using the library */
+# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT)
+ /* This forces use of a DLL, disallowing static linking */
+# define PNG_IMPEXP PNG_DLL_IMPORT
+# endif
# endif
-#endif
-#ifndef PNG_NO_WRITE_oFFs
-# define PNG_WRITE_oFFs_SUPPORTED
-# ifndef PNG_oFFs_SUPPORTED
-# define PNG_oFFs_SUPPORTED
+
+# ifndef PNG_IMPEXP
+# define PNG_IMPEXP
# endif
#endif
-#ifndef PNG_NO_WRITE_pCAL
-# define PNG_WRITE_pCAL_SUPPORTED
-# ifndef PNG_pCAL_SUPPORTED
-# define PNG_pCAL_SUPPORTED
-# endif
+
+/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat
+ * 'attributes' as a storage class - the attributes go at the start of the
+ * function definition, and attributes are always appended regardless of the
+ * compiler. This considerably simplifies these macros but may cause problems
+ * if any compilers both need function attributes and fail to handle them as
+ * a storage class (this is unlikely.)
+ */
+#ifndef PNG_FUNCTION
+# define PNG_FUNCTION(type, name, args, attributes) attributes type name args
#endif
-#ifndef PNG_NO_WRITE_sCAL
-# define PNG_WRITE_sCAL_SUPPORTED
-# ifndef PNG_sCAL_SUPPORTED
-# define PNG_sCAL_SUPPORTED
-# endif
+
+#ifndef PNG_EXPORT_TYPE
+# define PNG_EXPORT_TYPE(type) PNG_IMPEXP type
#endif
-#ifndef PNG_NO_WRITE_pHYs
-# define PNG_WRITE_pHYs_SUPPORTED
-# ifndef PNG_pHYs_SUPPORTED
-# define PNG_pHYs_SUPPORTED
-# endif
+
+ /* The ordinal value is only relevant when preprocessing png.h for symbol
+ * table entries, so we discard it here. See the .dfn files in the
+ * scripts directory.
+ */
+#ifndef PNG_EXPORTA
+
+# define PNG_EXPORTA(ordinal, type, name, args, attributes)\
+ PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \
+ extern attributes)
#endif
-#ifndef PNG_NO_WRITE_sBIT
-# define PNG_WRITE_sBIT_SUPPORTED
-# ifndef PNG_sBIT_SUPPORTED
-# define PNG_sBIT_SUPPORTED
-# endif
+
+/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
+ * so make something non-empty to satisfy the requirement:
+ */
+#define PNG_EMPTY /*empty list*/
+
+#define PNG_EXPORT(ordinal, type, name, args)\
+ PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
+
+/* Use PNG_REMOVED to comment out a removed interface. */
+#ifndef PNG_REMOVED
+# define PNG_REMOVED(ordinal, type, name, args, attributes)
#endif
-#ifndef PNG_NO_WRITE_sPLT
-# define PNG_WRITE_sPLT_SUPPORTED
-# ifndef PNG_sPLT_SUPPORTED
-# define PNG_sPLT_SUPPORTED
-# endif
+
+#ifndef PNG_CALLBACK
+# define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args)
#endif
-#ifndef PNG_NO_WRITE_sRGB
-# define PNG_WRITE_sRGB_SUPPORTED
-# ifndef PNG_sRGB_SUPPORTED
-# define PNG_sRGB_SUPPORTED
+
+/* Support for compiler specific function attributes. These are used
+ * so that where compiler support is available incorrect use of API
+ * functions in png.h will generate compiler warnings.
+ *
+ * Added at libpng-1.2.41.
+ */
+
+#ifndef PNG_NO_PEDANTIC_WARNINGS
+# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
+# define PNG_PEDANTIC_WARNINGS_SUPPORTED
# endif
#endif
-#ifndef PNG_NO_WRITE_tEXt
-# define PNG_WRITE_tEXt_SUPPORTED
-# ifndef PNG_tEXt_SUPPORTED
-# define PNG_tEXt_SUPPORTED
-# endif
+
+#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
+ /* Support for compiler specific function attributes. These are used
+ * so that where compiler support is available incorrect use of API
+ * functions in png.h will generate compiler warnings. Added at libpng
+ * version 1.2.41.
+ */
+# if defined(__GNUC__)
+# ifndef PNG_USE_RESULT
+# define PNG_USE_RESULT __attribute__((__warn_unused_result__))
+# endif
+# ifndef PNG_NORETURN
+# define PNG_NORETURN __attribute__((__noreturn__))
+# endif
+# ifndef PNG_PTR_NORETURN
+ /* It's not enough to have the compiler be the correct compiler at
+ * this point - it's necessary for the library (which defines
+ * the type of the library longjmp) to also be the GNU library.
+ * This is because many systems use the GNU compiler with a
+ * non-GNU libc implementation. Min/GW headers are also compatible
+ * with GCC as well as uclibc, so it seems best to exclude known
+ * problem libcs here rather than just including known libcs.
+ *
+ * NOTE: this relies on the only use of PNG_PTR_NORETURN being with
+ * the system longjmp. If the same type is used elsewhere then this
+ * will need to be changed.
+ */
+# if !defined(__CYGWIN__)
+# define PNG_PTR_NORETURN __attribute__((__noreturn__))
+# endif
+# endif
+# ifndef PNG_ALLOCATED
+# define PNG_ALLOCATED __attribute__((__malloc__))
+# endif
+
+ /* This specifically protects structure members that should only be
+ * accessed from within the library, therefore should be empty during
+ * a library build.
+ */
+# ifndef PNGLIB_BUILD
+# ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED __attribute__((__deprecated__))
+# endif
+# ifndef PNG_DEPSTRUCT
+# define PNG_DEPSTRUCT __attribute__((__deprecated__))
+# endif
+# ifndef PNG_PRIVATE
+# if 0 /* Doesn't work so we use deprecated instead*/
+# define PNG_PRIVATE \
+ __attribute__((warning("This function is not exported by libpng.")))
+# else
+# define PNG_PRIVATE \
+ __attribute__((__deprecated__))
+# endif
+# endif
+# endif /* PNGLIB_BUILD */
+# endif /* __GNUC__ */
+
+# if defined(_MSC_VER) && (_MSC_VER >= 1300)
+# ifndef PNG_USE_RESULT
+# define PNG_USE_RESULT /* not supported */
+# endif
+# ifndef PNG_NORETURN
+# define PNG_NORETURN __declspec(noreturn)
+# endif
+# ifndef PNG_PTR_NORETURN
+# define PNG_PTR_NORETURN /* not supported */
+# endif
+# ifndef PNG_ALLOCATED
+# define PNG_ALLOCATED __declspec(restrict)
+# endif
+
+ /* This specifically protects structure members that should only be
+ * accessed from within the library, therefore should be empty during
+ * a library build.
+ */
+# ifndef PNGLIB_BUILD
+# ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED __declspec(deprecated)
+# endif
+# ifndef PNG_DEPSTRUCT
+# define PNG_DEPSTRUCT __declspec(deprecated)
+# endif
+# ifndef PNG_PRIVATE
+# define PNG_PRIVATE __declspec(deprecated)
+# endif
+# endif /* PNGLIB_BUILD */
+# endif /* _MSC_VER */
+#endif /* PNG_PEDANTIC_WARNINGS */
+
+#ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED /* Use of this function is deprecated */
#endif
-#ifndef PNG_NO_WRITE_tIME
-# define PNG_WRITE_tIME_SUPPORTED
-# ifndef PNG_tIME_SUPPORTED
-# define PNG_tIME_SUPPORTED
-# endif
+#ifndef PNG_USE_RESULT
+# define PNG_USE_RESULT /* The result of this function must be checked */
#endif
-#ifndef PNG_NO_WRITE_tRNS
-# define PNG_WRITE_tRNS_SUPPORTED
-# ifndef PNG_tRNS_SUPPORTED
-# define PNG_tRNS_SUPPORTED
-# endif
+#ifndef PNG_NORETURN
+# define PNG_NORETURN /* This function does not return */
#endif
-#ifndef PNG_NO_WRITE_zTXt
-# define PNG_WRITE_zTXt_SUPPORTED
-# ifndef PNG_zTXt_SUPPORTED
-# define PNG_zTXt_SUPPORTED
-# endif
+#ifndef PNG_PTR_NORETURN
+# define PNG_PTR_NORETURN /* This function does not return */
#endif
-#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
- defined(PNG_WRITE_zTXt_SUPPORTED)
-# define PNG_WRITE_TEXT_SUPPORTED
-# ifndef PNG_TEXT_SUPPORTED
-# define PNG_TEXT_SUPPORTED
-# endif
+#ifndef PNG_ALLOCATED
+# define PNG_ALLOCATED /* The result of the function is new memory */
#endif
-
-#ifdef PNG_WRITE_tIME_SUPPORTED
-# ifndef PNG_NO_CONVERT_tIME
-# ifndef _WIN32_WCE
-/* The "tm" structure is not supported on WindowsCE */
-# ifndef PNG_CONVERT_tIME_SUPPORTED
-# define PNG_CONVERT_tIME_SUPPORTED
-# endif
-# endif
-# endif
+#ifndef PNG_DEPSTRUCT
+# define PNG_DEPSTRUCT /* Access to this struct member is deprecated */
#endif
-
-#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */
-
-#ifndef PNG_NO_WRITE_FILTER
-# ifndef PNG_WRITE_FILTER_SUPPORTED
-# define PNG_WRITE_FILTER_SUPPORTED
-# endif
+#ifndef PNG_PRIVATE
+# define PNG_PRIVATE /* This is a private libpng function */
#endif
-
-#ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
-# define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
-# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
-# define PNG_UNKNOWN_CHUNKS_SUPPORTED
+#ifndef PNG_FP_EXPORT /* A floating point API. */
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+# define PNG_FP_EXPORT(ordinal, type, name, args)\
+ PNG_EXPORT(ordinal, type, name, args)
+# else /* No floating point APIs */
+# define PNG_FP_EXPORT(ordinal, type, name, args)
# endif
#endif
-#ifndef PNG_NO_HANDLE_AS_UNKNOWN
-# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+#ifndef PNG_FIXED_EXPORT /* A fixed point API. */
+# ifdef PNG_FIXED_POINT_SUPPORTED
+# define PNG_FIXED_EXPORT(ordinal, type, name, args)\
+ PNG_EXPORT(ordinal, type, name, args)
+# else /* No fixed point APIs */
+# define PNG_FIXED_EXPORT(ordinal, type, name, args)
# endif
#endif
-#endif /* PNG_WRITE_SUPPORTED */
-/* Turn this off to disable png_read_png() and
- * png_write_png() and leave the row_pointers member
- * out of the info structure.
+/* The following uses const char * instead of char * for error
+ * and warning message functions, so some compilers won't complain.
+ * If you do not want to use const, define PNG_NO_CONST here.
+ *
+ * This should not change how the APIs are called, so it can be done
+ * on a per-file basis in the application.
*/
-#ifndef PNG_NO_INFO_IMAGE
-# define PNG_INFO_IMAGE_SUPPORTED
-#endif
-
-/* Need the time information for converting tIME chunks */
-#ifdef PNG_CONVERT_tIME_SUPPORTED
- /* "time.h" functions are not supported on WindowsCE */
-# include <time.h>
+#ifndef PNG_CONST
+# ifndef PNG_NO_CONST
+# define PNG_CONST const
+# else
+# define PNG_CONST
+# endif
#endif
/* Some typedefs to get us started. These should be safe on most of the
typedef unsigned char png_byte;
#ifdef PNG_NO_SIZE_T
- typedef unsigned int png_size_t;
+typedef unsigned int png_size_t;
#else
- typedef size_t png_size_t;
+typedef size_t png_size_t;
#endif
#define png_sizeof(x) (sizeof (x))
# else
# define LDATA 0
# endif
- /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
+ /* GRR: why is Cygwin in here? Cygwin is not Borland C... */
# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__)
-# define PNG_MAX_MALLOC_64K
+# define PNG_MAX_MALLOC_64K /* only used in build */
# if (LDATA != 1)
# ifndef FAR
# define FAR __far
# endif
# define USE_FAR_KEYWORD
# endif /* LDATA != 1 */
- /* Possibly useful for moving data out of default segment.
- * Uncomment it if you want. Could also define FARDATA as
- * const if your compiler supports it. (SJT)
-# define FARDATA FAR
- */
+ /* Possibly useful for moving data out of default segment.
+ * Uncomment it if you want. Could also define FARDATA as
+ * const if your compiler supports it. (SJT)
+# define FARDATA FAR
+ */
# endif /* __WIN32__, __FLAT__, __CYGWIN__ */
#endif /* __BORLANDC__ */
#endif
/* Typedef for floating-point numbers that are converted
- to fixed-point with a multiple of 100,000, e.g., int_gamma */
+ * to fixed-point with a multiple of 100,000, e.g., gamma
+ */
typedef png_int_32 png_fixed_point;
/* Add typedefs for pointers */
-typedef void FAR * png_voidp;
-typedef png_byte FAR * png_bytep;
-typedef png_uint_32 FAR * png_uint_32p;
-typedef png_int_32 FAR * png_int_32p;
-typedef png_uint_16 FAR * png_uint_16p;
-typedef png_int_16 FAR * png_int_16p;
-typedef PNG_CONST char FAR * png_const_charp;
-typedef char FAR * png_charp;
-typedef png_fixed_point FAR * png_fixed_point_p;
-
-#ifndef PNG_NO_STDIO
-typedef FILE * png_FILE_p;
+typedef void FAR * png_voidp;
+typedef PNG_CONST void FAR * png_const_voidp;
+typedef png_byte FAR * png_bytep;
+typedef PNG_CONST png_byte FAR * png_const_bytep;
+typedef png_uint_32 FAR * png_uint_32p;
+typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p;
+typedef png_int_32 FAR * png_int_32p;
+typedef PNG_CONST png_int_32 FAR * png_const_int_32p;
+typedef png_uint_16 FAR * png_uint_16p;
+typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p;
+typedef png_int_16 FAR * png_int_16p;
+typedef PNG_CONST png_int_16 FAR * png_const_int_16p;
+typedef char FAR * png_charp;
+typedef PNG_CONST char FAR * png_const_charp;
+typedef png_fixed_point FAR * png_fixed_point_p;
+typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p;
+typedef png_size_t FAR * png_size_tp;
+typedef PNG_CONST png_size_t FAR * png_const_size_tp;
+
+#ifdef PNG_STDIO_SUPPORTED
+typedef FILE * png_FILE_p;
#endif
#ifdef PNG_FLOATING_POINT_SUPPORTED
-typedef double FAR * png_doublep;
+typedef double FAR * png_doublep;
+typedef PNG_CONST double FAR * png_const_doublep;
#endif
/* Pointers to pointers; i.e. arrays */
/* Pointers to pointers to pointers; i.e., pointer to array */
typedef char FAR * FAR * FAR * png_charppp;
-/* Define PNG_BUILD_DLL if the module being built is a Windows
- * LIBPNG DLL.
- *
- * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
- * It is equivalent to Microsoft predefined macro _DLL that is
- * automatically defined when you compile using the share
- * version of the CRT (C Run-Time library)
- *
- * The cygwin mods make this behavior a little different:
- * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
- * Define PNG_STATIC if you are building a static library for use with cygwin,
- * -or- if you are building an application that you want to link to the
- * static library.
- * PNG_USE_DLL is defined by default (no user action needed) unless one of
- * the other flags is defined.
- */
-
-#if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL))
-# define PNG_DLL
-#endif
-
-/* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
- * you may get warnings regarding the linkage of png_zalloc and png_zfree.
- * Don't ignore those warnings; you must also reset the default calling
- * convention in your compiler to match your PNGAPI, and you must build
- * zlib and your applications the same way you build libpng.
- */
-
-#ifdef __CYGWIN__
-# undef PNGAPI
-# define PNGAPI __cdecl
-# undef PNG_IMPEXP
-# define PNG_IMPEXP
-#endif
-
-#ifdef __WATCOMC__
-# ifndef PNGAPI
-# define PNGAPI
-# endif
-#endif
-
-#if defined(__MINGW32__) && !defined(PNG_MODULEDEF)
-# ifndef PNG_NO_MODULEDEF
-# define PNG_NO_MODULEDEF
-# endif
-#endif
-
-#if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF)
-# define PNG_IMPEXP
-#endif
-
-#if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \
- (( defined(_Windows) || defined(_WINDOWS) || \
- defined(WIN32) || defined(_WIN32) || defined(__WIN32__) ))
-
-# ifndef PNGAPI
-# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
-# define PNGAPI __cdecl
-# else
-# define PNGAPI _cdecl
-# endif
-# endif
-
-# if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \
- 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
-# define PNG_IMPEXP
-# endif
-
-# ifndef PNG_IMPEXP
-
-# define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol
-# define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol
-
- /* Borland/Microsoft */
-# if defined(_MSC_VER) || defined(__BORLANDC__)
-# if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
-# define PNG_EXPORT PNG_EXPORT_TYPE1
-# else
-# define PNG_EXPORT PNG_EXPORT_TYPE2
-# ifdef PNG_BUILD_DLL
-# define PNG_IMPEXP __export
-# else
-# define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in VC++ */
-# endif /* Exists in Borland C++ for
- C++ classes (== huge) */
-# endif
-# endif
-
-# ifndef PNG_IMPEXP
-# ifdef PNG_BUILD_DLL
-# define PNG_IMPEXP __declspec(dllexport)
-# else
-# define PNG_IMPEXP __declspec(dllimport)
-# endif
-# endif
-# endif /* PNG_IMPEXP */
-#else /* !(DLL || non-cygwin WINDOWS) */
-# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
-# ifndef PNGAPI
-# define PNGAPI _System
-# endif
-# else
-# if 0 /* ... other platforms, with other meanings */
-# endif
-# endif
-#endif
-
-#ifndef PNGAPI
-# define PNGAPI
-#endif
-#ifndef PNG_IMPEXP
-# define PNG_IMPEXP
-#endif
-
-#ifdef PNG_BUILDSYMS
-# ifndef PNG_EXPORT
-# define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END
-# endif
-#endif
-
-#ifndef PNG_EXPORT
-# define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol
-#endif
-
-#define PNG_USE_LOCAL_ARRAYS /* Not used in libpng, defined for legacy apps */
-
-/* Support for compiler specific function attributes. These are used
- * so that where compiler support is available incorrect use of API
- * functions in png.h will generate compiler warnings.
- *
- * Added at libpng-1.2.41.
- */
-
-#ifndef PNG_NO_PEDANTIC_WARNINGS
-# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
-# define PNG_PEDANTIC_WARNINGS_SUPPORTED
-# endif
-#endif
-
-#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
-/* Support for compiler specific function attributes. These are used
- * so that where compiler support is available incorrect use of API
- * functions in png.h will generate compiler warnings. Added at libpng
- * version 1.2.41.
- */
-# ifdef __GNUC__
-# ifndef PNG_USE_RESULT
-# define PNG_USE_RESULT __attribute__((__warn_unused_result__))
-# endif
-# ifndef PNG_NORETURN
-# define PNG_NORETURN __attribute__((__noreturn__))
-# endif
-# ifndef PNG_ALLOCATED
-# define PNG_ALLOCATED __attribute__((__malloc__))
-# endif
-
- /* This specifically protects structure members that should only be
- * accessed from within the library, therefore should be empty during
- * a library build.
- */
-# ifndef PNG_DEPRECATED
-# define PNG_DEPRECATED __attribute__((__deprecated__))
-# endif
-# ifndef PNG_DEPSTRUCT
-# define PNG_DEPSTRUCT __attribute__((__deprecated__))
-# endif
-# ifndef PNG_PRIVATE
-# if 0 /* Doesn't work so we use deprecated instead*/
-# define PNG_PRIVATE \
- __attribute__((warning("This function is not exported by libpng.")))
-# else
-# define PNG_PRIVATE \
- __attribute__((__deprecated__))
-# endif
-# endif /* PNG_PRIVATE */
-# endif /* __GNUC__ */
-#endif /* PNG_PEDANTIC_WARNINGS */
-
-#ifndef PNG_DEPRECATED
-# define PNG_DEPRECATED /* Use of this function is deprecated */
-#endif
-#ifndef PNG_USE_RESULT
-# define PNG_USE_RESULT /* The result of this function must be checked */
-#endif
-#ifndef PNG_NORETURN
-# define PNG_NORETURN /* This function does not return */
-#endif
-#ifndef PNG_ALLOCATED
-# define PNG_ALLOCATED /* The result of the function is new memory */
-#endif
-#ifndef PNG_DEPSTRUCT
-# define PNG_DEPSTRUCT /* Access to this struct member is deprecated */
-#endif
-#ifndef PNG_PRIVATE
-# define PNG_PRIVATE /* This is a private libpng function */
-#endif
-
-/* Users may want to use these so they are not private. Any library
- * functions that are passed far data must be model-independent.
- */
-
-/* memory model/platform independent fns */
-#ifndef PNG_ABORT
-# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_))
-# define PNG_ABORT() ExitProcess(0)
-# else
-# define PNG_ABORT() abort()
-# endif
-#endif
-
-#ifdef USE_FAR_KEYWORD
-/* Use this to make far-to-near assignments */
-# define CHECK 1
-# define NOCHECK 0
-# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
-# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
-# define png_strcpy _fstrcpy
-# define png_strncpy _fstrncpy /* Added to v 1.2.6 */
-# define png_strlen _fstrlen
-# define png_memcmp _fmemcmp /* SJT: added */
-# define png_memcpy _fmemcpy
-# define png_memset _fmemset
-# define png_sprintf sprintf
-#else
-# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_))
-# /* Favor Windows over C runtime fns */
-# define CVT_PTR(ptr) (ptr)
-# define CVT_PTR_NOCHECK(ptr) (ptr)
-# define png_strcpy lstrcpyA
-# define png_strncpy lstrcpynA
-# define png_strlen lstrlenA
-# define png_memcmp memcmp
-# define png_memcpy CopyMemory
-# define png_memset memset
-# define png_sprintf wsprintfA
-# else
-# define CVT_PTR(ptr) (ptr)
-# define CVT_PTR_NOCHECK(ptr) (ptr)
-# define png_strcpy strcpy
-# define png_strncpy strncpy /* Added to v 1.2.6 */
-# define png_strlen strlen
-# define png_memcmp memcmp /* SJT: added */
-# define png_memcpy memcpy
-# define png_memset memset
-# define png_sprintf sprintf
-# endif
-#endif
-
-#ifndef PNG_NO_SNPRINTF
-# ifdef _MSC_VER
-# define png_snprintf _snprintf /* Added to v 1.2.19 */
-# define png_snprintf2 _snprintf
-# define png_snprintf6 _snprintf
-# else
-# define png_snprintf snprintf /* Added to v 1.2.19 */
-# define png_snprintf2 snprintf
-# define png_snprintf6 snprintf
-# endif
-#else
- /* You don't have or don't want to use snprintf(). Caution: Using
- * sprintf instead of snprintf exposes your application to accidental
- * or malevolent buffer overflows. If you don't have snprintf()
- * as a general rule you should provide one (you can get one from
- * Portable OpenSSH).
- */
-# define png_snprintf(s1,n,fmt,x1) png_sprintf(s1,fmt,x1)
-# define png_snprintf2(s1,n,fmt,x1,x2) png_sprintf(s1,fmt,x1,x2)
-# define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
- png_sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
-#endif
-
/* png_alloc_size_t is guaranteed to be no smaller than png_size_t,
* and no smaller than png_uint_32. Casts from png_size_t or png_uint_32
* to png_alloc_size_t are not necessary; in fact, it is recommended
# endif
# endif
#endif
-/* End of memory model/platform independent support */
-
-/* Just a little check that someone hasn't tried to define something
- * contradictory.
- */
-#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
-# undef PNG_ZBUF_SIZE
-# define PNG_ZBUF_SIZE 65536L
-#endif
-
-
-/* Added at libpng-1.2.8 */
-#endif /* PNG_VERSION_INFO_ONLY */
#endif /* PNGCONF_H */
--- /dev/null
+
+/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
+ *
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+/* Define PNG_DEBUG at compile time for debugging information. Higher
+ * numbers for PNG_DEBUG mean more debugging information. This has
+ * only been added since version 0.95 so it is not implemented throughout
+ * libpng yet, but more support will be added as needed.
+ *
+ * png_debug[1-2]?(level, message ,arg{0-2})
+ * Expands to a statement (either a simple expression or a compound
+ * do..while(0) statement) that outputs a message with parameter
+ * substitution if PNG_DEBUG is defined to 2 or more. If PNG_DEBUG
+ * is undefined, 0 or 1 every png_debug expands to a simple expression
+ * (actually ((void)0)).
+ *
+ * level: level of detail of message, starting at 0. A level 'n'
+ * message is preceded by 'n' tab characters (not implemented
+ * on Microsoft compilers unless PNG_DEBUG_FILE is also
+ * defined, to allow debug DLL compilation with no standard IO).
+ * message: a printf(3) style text string. A trailing '\n' is added
+ * to the message.
+ * arg: 0 to 2 arguments for printf(3) style substitution in message.
+ */
+#ifndef PNGDEBUG_H
+#define PNGDEBUG_H
+/* These settings control the formatting of messages in png.c and pngerror.c */
+/* Moved to pngdebug.h at 1.5.0 */
+# ifndef PNG_LITERAL_SHARP
+# define PNG_LITERAL_SHARP 0x23
+# endif
+# ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
+# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
+# endif
+# ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
+# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
+# endif
+# ifndef PNG_STRING_NEWLINE
+# define PNG_STRING_NEWLINE "\n"
+# endif
+
+#ifdef PNG_DEBUG
+# if (PNG_DEBUG > 0)
+# if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
+# include <crtdbg.h>
+# if (PNG_DEBUG > 1)
+# ifndef _DEBUG
+# define _DEBUG
+# endif
+# ifndef png_debug
+# define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
+# endif
+# ifndef png_debug1
+# define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
+# endif
+# ifndef png_debug2
+# define png_debug2(l,m,p1,p2) \
+ _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
+# endif
+# endif
+# else /* PNG_DEBUG_FILE || !_MSC_VER */
+# ifndef PNG_STDIO_SUPPORTED
+# include <stdio.h> /* not included yet */
+# endif
+# ifndef PNG_DEBUG_FILE
+# define PNG_DEBUG_FILE stderr
+# endif /* PNG_DEBUG_FILE */
+
+# if (PNG_DEBUG > 1)
+/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
+ * non-ISO compilers
+ */
+# ifdef __STDC__
+# ifndef png_debug
+# define png_debug(l,m) \
+ do { \
+ int num_tabs=l; \
+ fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
+ } while (0)
+# endif
+# ifndef png_debug1
+# define png_debug1(l,m,p1) \
+ do { \
+ int num_tabs=l; \
+ fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
+ } while (0)
+# endif
+# ifndef png_debug2
+# define png_debug2(l,m,p1,p2) \
+ do { \
+ int num_tabs=l; \
+ fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
+ } while (0)
+# endif
+# else /* __STDC __ */
+# ifndef png_debug
+# define png_debug(l,m) \
+ do { \
+ int num_tabs=l; \
+ char format[256]; \
+ snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+ m,PNG_STRING_NEWLINE); \
+ fprintf(PNG_DEBUG_FILE,format); \
+ } while (0)
+# endif
+# ifndef png_debug1
+# define png_debug1(l,m,p1) \
+ do { \
+ int num_tabs=l; \
+ char format[256]; \
+ snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+ m,PNG_STRING_NEWLINE); \
+ fprintf(PNG_DEBUG_FILE,format,p1); \
+ } while (0)
+# endif
+# ifndef png_debug2
+# define png_debug2(l,m,p1,p2) \
+ do { \
+ int num_tabs=l; \
+ char format[256]; \
+ snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
+ (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
+ m,PNG_STRING_NEWLINE); \
+ fprintf(PNG_DEBUG_FILE,format,p1,p2); \
+ } while (0)
+# endif
+# endif /* __STDC __ */
+# endif /* (PNG_DEBUG > 1) */
+
+# endif /* _MSC_VER */
+# endif /* (PNG_DEBUG > 0) */
+#endif /* PNG_DEBUG */
+#ifndef png_debug
+# define png_debug(l, m) ((void)0)
+#endif
+#ifndef png_debug1
+# define png_debug1(l, m, p1) ((void)0)
+#endif
+#ifndef png_debug2
+# define png_debug2(l, m, p1, p2) ((void)0)
+#endif
+#endif /* PNGDEBUG_H */
/* pngerror.c - stub functions for i/o and memory allocation
*
- * Last changed in libpng 1.4.0 [January 3, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* at each function.
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#include "pngpriv.h"
-static void /* PRIVATE */
-png_default_error PNGARG((png_structp png_ptr,
- png_const_charp error_message)) PNG_NORETURN;
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
+static PNG_FUNCTION(void, png_default_error,PNGARG((png_structp png_ptr,
+ png_const_charp error_message)),PNG_NORETURN);
+
#ifdef PNG_WARNINGS_SUPPORTED
static void /* PRIVATE */
png_default_warning PNGARG((png_structp png_ptr,
- png_const_charp warning_message));
+ png_const_charp warning_message));
#endif /* PNG_WARNINGS_SUPPORTED */
/* This function is called whenever there is a fatal error. This function
* to replace the error function at run-time.
*/
#ifdef PNG_ERROR_TEXT_SUPPORTED
-void PNGAPI
-png_error(png_structp png_ptr, png_const_charp error_message)
+PNG_FUNCTION(void,PNGAPI
+png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN)
{
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
char msg[16];
if (png_ptr != NULL)
{
- if (png_ptr->flags&
- (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
- {
- if (*error_message == PNG_LITERAL_SHARP)
- {
- /* Strip "#nnnn " from beginning of error message. */
- int offset;
- for (offset = 1; offset<15; offset++)
- if (error_message[offset] == ' ')
+ if (png_ptr->flags&
+ (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+ {
+ if (*error_message == PNG_LITERAL_SHARP)
+ {
+ /* Strip "#nnnn " from beginning of error message. */
+ int offset;
+ for (offset = 1; offset<15; offset++)
+ if (error_message[offset] == ' ')
break;
- if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
- {
- int i;
- for (i = 0; i < offset - 1; i++)
- msg[i] = error_message[i + 1];
- msg[i - 1] = '\0';
- error_message = msg;
- }
- else
- error_message += offset;
- }
- else
- {
- if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
- {
- msg[0] = '0';
- msg[1] = '\0';
- error_message = msg;
- }
+
+ if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+ {
+ int i;
+ for (i = 0; i < offset - 1; i++)
+ msg[i] = error_message[i + 1];
+ msg[i - 1] = '\0';
+ error_message = msg;
+ }
+
+ else
+ error_message += offset;
+ }
+
+ else
+ {
+ if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+ {
+ msg[0] = '0';
+ msg[1] = '\0';
+ error_message = msg;
+ }
}
}
}
png_default_error(png_ptr, error_message);
}
#else
-void PNGAPI
-png_err(png_structp png_ptr)
+PNG_FUNCTION(void,PNGAPI
+png_err,(png_structp png_ptr),PNG_NORETURN)
{
if (png_ptr != NULL && png_ptr->error_fn != NULL)
(*(png_ptr->error_fn))(png_ptr, '\0');
{
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
if (png_ptr->flags&
- (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+ (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
#endif
- {
- if (*warning_message == PNG_LITERAL_SHARP)
- {
- for (offset = 1; offset < 15; offset++)
- if (warning_message[offset] == ' ')
+ {
+ if (*warning_message == PNG_LITERAL_SHARP)
+ {
+ for (offset = 1; offset < 15; offset++)
+ if (warning_message[offset] == ' ')
break;
- }
- }
+ }
+ }
}
if (png_ptr != NULL && png_ptr->warning_fn != NULL)
(*(png_ptr->warning_fn))(png_ptr, warning_message + offset);
png_benign_error(png_structp png_ptr, png_const_charp error_message)
{
if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
- png_warning(png_ptr, error_message);
+ png_warning(png_ptr, error_message);
else
- png_error(png_ptr, error_message);
+ png_error(png_ptr, error_message);
}
#endif
#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED)
static void /* PRIVATE */
png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
- error_message)
+ error_message)
{
int iout = 0, iin = 0;
buffer[iout++] = png_digit[c & 0x0f];
buffer[iout++] = PNG_LITERAL_RIGHT_SQUARE_BRACKET;
}
+
else
{
buffer[iout++] = (png_byte)c;
if (error_message == NULL)
buffer[iout] = '\0';
+
else
{
buffer[iout++] = ':';
buffer[iout + PNG_MAX_ERROR_TEXT - 1] = '\0';
}
}
+#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */
-#ifdef PNG_READ_SUPPORTED
-void PNGAPI
-png_chunk_error(png_structp png_ptr, png_const_charp error_message)
+#if defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED)
+PNG_FUNCTION(void,PNGAPI
+png_chunk_error,(png_structp png_ptr, png_const_charp error_message),
+ PNG_NORETURN)
{
char msg[18+PNG_MAX_ERROR_TEXT];
if (png_ptr == NULL)
- png_error(png_ptr, error_message);
+ png_error(png_ptr, error_message);
+
else
{
- png_format_buffer(png_ptr, msg, error_message);
- png_error(png_ptr, msg);
+ png_format_buffer(png_ptr, msg, error_message);
+ png_error(png_ptr, msg);
}
}
-#endif /* PNG_READ_SUPPORTED */
-#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */
+#endif /* PNG_READ_SUPPORTED && PNG_ERROR_TEXT_SUPPORTED */
#ifdef PNG_WARNINGS_SUPPORTED
void PNGAPI
{
char msg[18+PNG_MAX_ERROR_TEXT];
if (png_ptr == NULL)
- png_warning(png_ptr, warning_message);
+ png_warning(png_ptr, warning_message);
+
else
{
- png_format_buffer(png_ptr, msg, warning_message);
- png_warning(png_ptr, msg);
+ png_format_buffer(png_ptr, msg, warning_message);
+ png_warning(png_ptr, msg);
}
}
#endif /* PNG_WARNINGS_SUPPORTED */
void PNGAPI
png_chunk_benign_error(png_structp png_ptr, png_const_charp error_message)
{
- if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
- png_chunk_warning(png_ptr, error_message);
- else
- png_chunk_error(png_ptr, error_message);
+ if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
+ png_chunk_warning(png_ptr, error_message);
+
+ else
+ png_chunk_error(png_ptr, error_message);
}
#endif
#endif /* PNG_READ_SUPPORTED */
+#ifdef PNG_ERROR_TEXT_SUPPORTED
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+PNG_FUNCTION(void,
+png_fixed_error,(png_structp png_ptr, png_const_charp name),PNG_NORETURN)
+{
+# define fixed_message "fixed point overflow in "
+# define fixed_message_ln ((sizeof fixed_message)-1)
+ int iin;
+ char msg[fixed_message_ln+PNG_MAX_ERROR_TEXT];
+ png_memcpy(msg, fixed_message, fixed_message_ln);
+ iin = 0;
+ if (name != NULL) while (iin < (PNG_MAX_ERROR_TEXT-1) && name[iin] != 0)
+ {
+ msg[fixed_message_ln + iin] = name[iin];
+ ++iin;
+ }
+ msg[fixed_message_ln + iin] = 0;
+ png_error(png_ptr, msg);
+}
+#endif
+#endif
+
#ifdef PNG_SETJMP_SUPPORTED
/* This API only exists if ANSI-C style error handling is used,
* otherwise it is necessary for png_default_error to be overridden.
return NULL;
png_ptr->longjmp_fn = longjmp_fn;
- return &png_ptr->jmpbuf;
+ return &png_ptr->png_jmpbuf;
}
#endif
* function is used by default, or if the program supplies NULL for the
* error function pointer in png_set_error_fn().
*/
-static void /* PRIVATE */
-png_default_error(png_structp png_ptr, png_const_charp error_message)
+static PNG_FUNCTION(void /* PRIVATE */,
+png_default_error,(png_structp png_ptr, png_const_charp error_message),
+ PNG_NORETURN)
{
#ifdef PNG_CONSOLE_IO_SUPPORTED
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
if (*error_message == PNG_LITERAL_SHARP)
{
- /* Strip "#nnnn " from beginning of error message. */
- int offset;
- char error_number[16];
- for (offset = 0; offset<15; offset++)
- {
+ /* Strip "#nnnn " from beginning of error message. */
+ int offset;
+ char error_number[16];
+ for (offset = 0; offset<15; offset++)
+ {
error_number[offset] = error_message[offset + 1];
if (error_message[offset] == ' ')
- break;
- }
- if ((offset > 1) && (offset < 15))
- {
- error_number[offset - 1] = '\0';
- fprintf(stderr, "libpng error no. %s: %s",
- error_number, error_message + offset + 1);
- fprintf(stderr, PNG_STRING_NEWLINE);
- }
- else
- {
- fprintf(stderr, "libpng error: %s, offset=%d",
- error_message, offset);
- fprintf(stderr, PNG_STRING_NEWLINE);
- }
+ break;
+ }
+
+ if ((offset > 1) && (offset < 15))
+ {
+ error_number[offset - 1] = '\0';
+ fprintf(stderr, "libpng error no. %s: %s",
+ error_number, error_message + offset + 1);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
+
+ else
+ {
+ fprintf(stderr, "libpng error: %s, offset=%d",
+ error_message, offset);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
}
else
#endif
fprintf(stderr, PNG_STRING_NEWLINE);
}
#endif
+#ifndef PNG_CONSOLE_IO_SUPPORTED
+ PNG_UNUSED(error_message) /* Make compiler happy */
+#endif
+ png_longjmp(png_ptr, 1);
+}
+PNG_FUNCTION(void,PNGAPI
+png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN)
+{
#ifdef PNG_SETJMP_SUPPORTED
if (png_ptr && png_ptr->longjmp_fn)
{
# ifdef USE_FAR_KEYWORD
- {
- jmp_buf jmpbuf;
- png_memcpy(jmpbuf, png_ptr->jmpbuf, png_sizeof(jmp_buf));
- png_ptr->longjmp_fn(jmpbuf, 1);
- }
+ {
+ jmp_buf png_jmpbuf;
+ png_memcpy(png_jmpbuf, png_ptr->png_jmpbuf, png_sizeof(jmp_buf));
+ png_ptr->longjmp_fn(png_jmpbuf, val);
+ }
+
# else
- png_ptr->longjmp_fn(png_ptr->jmpbuf, 1);
+ png_ptr->longjmp_fn(png_ptr->png_jmpbuf, val);
# endif
}
#endif
/* Here if not setjmp support or if png_ptr is null. */
PNG_ABORT();
-#ifndef PNG_CONSOLE_IO_SUPPORTED
- error_message = error_message; /* Make compiler happy */
-#endif
}
#ifdef PNG_WARNINGS_SUPPORTED
# ifdef PNG_ERROR_NUMBERS_SUPPORTED
if (*warning_message == PNG_LITERAL_SHARP)
{
- int offset;
- char warning_number[16];
- for (offset = 0; offset < 15; offset++)
- {
- warning_number[offset] = warning_message[offset + 1];
- if (warning_message[offset] == ' ')
+ int offset;
+ char warning_number[16];
+ for (offset = 0; offset < 15; offset++)
+ {
+ warning_number[offset] = warning_message[offset + 1];
+ if (warning_message[offset] == ' ')
break;
- }
- if ((offset > 1) && (offset < 15))
- {
- warning_number[offset + 1] = '\0';
- fprintf(stderr, "libpng warning no. %s: %s",
- warning_number, warning_message + offset);
- fprintf(stderr, PNG_STRING_NEWLINE);
- }
- else
- {
- fprintf(stderr, "libpng warning: %s",
- warning_message);
- fprintf(stderr, PNG_STRING_NEWLINE);
- }
+ }
+
+ if ((offset > 1) && (offset < 15))
+ {
+ warning_number[offset + 1] = '\0';
+ fprintf(stderr, "libpng warning no. %s: %s",
+ warning_number, warning_message + offset);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
+
+ else
+ {
+ fprintf(stderr, "libpng warning: %s",
+ warning_message);
+ fprintf(stderr, PNG_STRING_NEWLINE);
+ }
}
else
# endif
+
{
- fprintf(stderr, "libpng warning: %s", warning_message);
- fprintf(stderr, PNG_STRING_NEWLINE);
+ fprintf(stderr, "libpng warning: %s", warning_message);
+ fprintf(stderr, PNG_STRING_NEWLINE);
}
#else
- warning_message = warning_message; /* Make compiler happy */
+ PNG_UNUSED(warning_message) /* Make compiler happy */
#endif
- png_ptr = png_ptr; /* Make compiler happy */
+ PNG_UNUSED(png_ptr) /* Make compiler happy */
}
#endif /* PNG_WARNINGS_SUPPORTED */
/* This function is called when the application wants to use another method
* of handling errors and warnings. Note that the error function MUST NOT
* return to the calling routine or serious problems will occur. The return
- * method used in the default routine calls longjmp(png_ptr->jmpbuf, 1)
+ * method used in the default routine calls longjmp(png_ptr->png_jmpbuf, 1)
*/
void PNGAPI
png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warning_fn)
+ png_error_ptr error_fn, png_error_ptr warning_fn)
{
if (png_ptr == NULL)
return;
+
png_ptr->error_ptr = error_ptr;
png_ptr->error_fn = error_fn;
png_ptr->warning_fn = warning_fn;
* pointer before png_write_destroy and png_read_destroy are called.
*/
png_voidp PNGAPI
-png_get_error_ptr(png_structp png_ptr)
+png_get_error_ptr(png_const_structp png_ptr)
{
if (png_ptr == NULL)
return NULL;
+
return ((png_voidp)png_ptr->error_ptr);
}
{
if (png_ptr != NULL)
{
- png_ptr->flags &=
- ((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
+ png_ptr->flags &=
+ ((~(PNG_FLAG_STRIP_ERROR_NUMBERS |
+ PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
}
}
#endif
/* pngget.c - retrieval of values from info struct
*
- * Last changed in libpng 1.4.2 [May 6, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
*
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#include "pngpriv.h"
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
png_uint_32 PNGAPI
-png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
+png_get_valid(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_32 flag)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->valid & flag);
- else
- return(0);
+ return(0);
}
png_size_t PNGAPI
-png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
+png_get_rowbytes(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->rowbytes);
- else
- return(0);
+ return(0);
}
#ifdef PNG_INFO_IMAGE_SUPPORTED
png_bytepp PNGAPI
-png_get_rows(png_structp png_ptr, png_infop info_ptr)
+png_get_rows(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->row_pointers);
- else
- return(0);
+ return(0);
}
#endif
#ifdef PNG_EASY_ACCESS_SUPPORTED
/* Easy access to info, added in libpng-0.99 */
png_uint_32 PNGAPI
-png_get_image_width(png_structp png_ptr, png_infop info_ptr)
+png_get_image_width(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->width;
}
png_uint_32 PNGAPI
-png_get_image_height(png_structp png_ptr, png_infop info_ptr)
+png_get_image_height(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->height;
}
png_byte PNGAPI
-png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
+png_get_bit_depth(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->bit_depth;
}
png_byte PNGAPI
-png_get_color_type(png_structp png_ptr, png_infop info_ptr)
+png_get_color_type(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->color_type;
}
png_byte PNGAPI
-png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
+png_get_filter_type(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->filter_type;
}
png_byte PNGAPI
-png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
+png_get_interlace_type(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->interlace_type;
}
png_byte PNGAPI
-png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
+png_get_compression_type(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return info_ptr->compression_type;
}
png_uint_32 PNGAPI
-png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
+png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
{
- if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_pHYs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_pHYs)
- {
- png_debug1(1, "in %s retrieval function", "png_get_x_pixels_per_meter");
-
- if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
- return (0);
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
+ {
+ png_debug1(1, "in %s retrieval function",
+ "png_get_x_pixels_per_meter");
- else
- return (info_ptr->x_pixels_per_unit);
- }
-#else
- return (0);
+ if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
+ return (info_ptr->x_pixels_per_unit);
+ }
#endif
+
return (0);
}
png_uint_32 PNGAPI
-png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
+png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
{
- if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_pHYs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_pHYs)
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
- png_debug1(1, "in %s retrieval function", "png_get_y_pixels_per_meter");
-
- if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
- return (0);
+ png_debug1(1, "in %s retrieval function",
+ "png_get_y_pixels_per_meter");
- else
- return (info_ptr->y_pixels_per_unit);
+ if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
+ return (info_ptr->y_pixels_per_unit);
}
-#else
- return (0);
#endif
+
return (0);
}
png_uint_32 PNGAPI
-png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
+png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
{
- if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_pHYs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_pHYs)
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");
- if (info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
- info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
- return (0);
-
- else
- return (info_ptr->x_pixels_per_unit);
+ if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER &&
+ info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit)
+ return (info_ptr->x_pixels_per_unit);
}
-#else
- return (0);
#endif
+
return (0);
}
#ifdef PNG_FLOATING_POINT_SUPPORTED
float PNGAPI
-png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
- {
- if (png_ptr != NULL && info_ptr != NULL)
-#ifdef PNG_pHYs_SUPPORTED
-
- if (info_ptr->valid & PNG_INFO_pHYs)
+png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+#ifdef PNG_READ_pHYs_SUPPORTED
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
- if (info_ptr->x_pixels_per_unit == 0)
- return ((float)0.0);
-
- else
+ if (info_ptr->x_pixels_per_unit != 0)
return ((float)((float)info_ptr->y_pixels_per_unit
- /(float)info_ptr->x_pixels_per_unit));
+ /(float)info_ptr->x_pixels_per_unit));
}
-#else
- return (0.0);
#endif
+
return ((float)0.0);
}
#endif
+#ifdef PNG_FIXED_POINT_SUPPORTED
+png_fixed_point PNGAPI
+png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr,
+ png_const_infop info_ptr)
+{
+#ifdef PNG_READ_pHYs_SUPPORTED
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)
+ && info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0
+ && info_ptr->x_pixels_per_unit <= PNG_UINT_31_MAX
+ && info_ptr->y_pixels_per_unit <= PNG_UINT_31_MAX)
+ {
+ png_fixed_point res;
+
+ png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio_fixed");
+
+ /* The following casts work because a PNG 4 byte integer only has a valid
+ * range of 0..2^31-1; otherwise the cast might overflow.
+ */
+ if (png_muldiv(&res, (png_int_32)info_ptr->y_pixels_per_unit, PNG_FP_1,
+ (png_int_32)info_ptr->x_pixels_per_unit))
+ return res;
+ }
+#endif
+
+ return 0;
+}
+#endif
+
png_int_32 PNGAPI
-png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
+png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
{
- if (png_ptr != NULL && info_ptr != NULL)
#ifdef PNG_oFFs_SUPPORTED
-
- if (info_ptr->valid & PNG_INFO_oFFs)
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
- if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
- return (0);
-
- else
- return (info_ptr->x_offset);
+ if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
+ return (info_ptr->x_offset);
}
-#else
- return (0);
#endif
+
return (0);
}
png_int_32 PNGAPI
-png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
+png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
{
- if (png_ptr != NULL && info_ptr != NULL)
-
#ifdef PNG_oFFs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_oFFs)
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
- if (info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
- return (0);
-
- else
- return (info_ptr->y_offset);
+ if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
+ return (info_ptr->y_offset);
}
-#else
- return (0);
#endif
+
return (0);
}
png_int_32 PNGAPI
-png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
+png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
{
- if (png_ptr != NULL && info_ptr != NULL)
-
#ifdef PNG_oFFs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_oFFs)
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
- png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
-
- if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
- return (0);
+ png_debug1(1, "in %s retrieval function", "png_get_x_offset_pixels");
- else
- return (info_ptr->x_offset);
+ if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
+ return (info_ptr->x_offset);
}
-#else
- return (0);
#endif
+
return (0);
}
png_int_32 PNGAPI
-png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
+png_get_y_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
{
- if (png_ptr != NULL && info_ptr != NULL)
-
#ifdef PNG_oFFs_SUPPORTED
- if (info_ptr->valid & PNG_INFO_oFFs)
+ if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
- png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
+ png_debug1(1, "in %s retrieval function", "png_get_y_offset_pixels");
- if (info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
- return (0);
-
- else
- return (info_ptr->y_offset);
+ if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
+ return (info_ptr->y_offset);
}
-#else
- return (0);
#endif
+
return (0);
}
-#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
+#ifdef PNG_INCH_CONVERSIONS_SUPPORTED
+static png_uint_32
+ppi_from_ppm(png_uint_32 ppm)
+{
+#if 0
+ /* The conversion is *(2.54/100), in binary (32 digits):
+ * .00000110100000001001110101001001
+ */
+ png_uint_32 t1001, t1101;
+ ppm >>= 1; /* .1 */
+ t1001 = ppm + (ppm >> 3); /* .1001 */
+ t1101 = t1001 + (ppm >> 1); /* .1101 */
+ ppm >>= 20; /* .000000000000000000001 */
+ t1101 += t1101 >> 15; /* .1101000000000001101 */
+ t1001 >>= 11; /* .000000000001001 */
+ t1001 += t1001 >> 12; /* .000000000001001000000001001 */
+ ppm += t1001; /* .000000000001001000001001001 */
+ ppm += t1101; /* .110100000001001110101001001 */
+ return (ppm + 16) >> 5;/* .00000110100000001001110101001001 */
+#else
+ /* The argument is a PNG unsigned integer, so it is not permitted
+ * to be bigger than 2^31.
+ */
+ png_fixed_point result;
+ if (ppm <= PNG_UINT_31_MAX && png_muldiv(&result, (png_int_32)ppm, 127,
+ 5000))
+ return result;
+
+ /* Overflow. */
+ return 0;
+#endif
+}
+
png_uint_32 PNGAPI
-png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
+png_get_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
{
- return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr)
- *.0254 +.5));
+ return ppi_from_ppm(png_get_pixels_per_meter(png_ptr, info_ptr));
}
png_uint_32 PNGAPI
-png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
+png_get_x_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
{
- return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr)
- *.0254 +.5));
+ return ppi_from_ppm(png_get_x_pixels_per_meter(png_ptr, info_ptr));
}
png_uint_32 PNGAPI
-png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
+png_get_y_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr)
{
- return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr)
- *.0254 +.5));
+ return ppi_from_ppm(png_get_y_pixels_per_meter(png_ptr, info_ptr));
}
+#ifdef PNG_FIXED_POINT_SUPPORTED
+static png_fixed_point
+png_fixed_inches_from_microns(png_structp png_ptr, png_int_32 microns)
+{
+ /* Convert from metres * 1,000,000 to inches * 100,000, meters to
+ * inches is simply *(100/2.54), so we want *(10/2.54) == 500/127.
+ * Notice that this can overflow - a warning is output and 0 is
+ * returned.
+ */
+ return png_muldiv_warn(png_ptr, microns, 500, 127);
+}
+
+png_fixed_point PNGAPI
+png_get_x_offset_inches_fixed(png_structp png_ptr,
+ png_const_infop info_ptr)
+{
+ return png_fixed_inches_from_microns(png_ptr,
+ png_get_x_offset_microns(png_ptr, info_ptr));
+}
+#endif
+
+#ifdef PNG_FIXED_POINT_SUPPORTED
+png_fixed_point PNGAPI
+png_get_y_offset_inches_fixed(png_structp png_ptr,
+ png_const_infop info_ptr)
+{
+ return png_fixed_inches_from_microns(png_ptr,
+ png_get_y_offset_microns(png_ptr, info_ptr));
+}
+#endif
+
+#ifdef PNG_FLOATING_POINT_SUPPORTED
float PNGAPI
-png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
+png_get_x_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr)
{
- return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
- *.00003937);
+ /* To avoid the overflow do the conversion directly in floating
+ * point.
+ */
+ return (float)(png_get_x_offset_microns(png_ptr, info_ptr) * .00003937);
}
+#endif
+#ifdef PNG_FLOATING_POINT_SUPPORTED
float PNGAPI
-png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
+png_get_y_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr)
{
- return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
- *.00003937);
+ /* To avoid the overflow do the conversion directly in floating
+ * point.
+ */
+ return (float)(png_get_y_offset_microns(png_ptr, info_ptr) * .00003937);
}
+#endif
#ifdef PNG_pHYs_SUPPORTED
png_uint_32 PNGAPI
-png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
+png_get_pHYs_dpi(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
{
png_uint_32 retval = 0;
*res_x = info_ptr->x_pixels_per_unit;
retval |= PNG_INFO_pHYs;
}
+
if (res_y != NULL)
{
*res_y = info_ptr->y_pixels_per_unit;
retval |= PNG_INFO_pHYs;
}
+
if (unit_type != NULL)
{
*unit_type = (int)info_ptr->phys_unit_type;
retval |= PNG_INFO_pHYs;
+
if (*unit_type == 1)
{
if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
}
}
}
+
return (retval);
}
#endif /* PNG_pHYs_SUPPORTED */
-#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
+#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */
/* png_get_channels really belongs in here, too, but it's been around longer */
#endif /* PNG_EASY_ACCESS_SUPPORTED */
png_byte PNGAPI
-png_get_channels(png_structp png_ptr, png_infop info_ptr)
+png_get_channels(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->channels);
- else
- return (0);
+
+ return (0);
}
-png_bytep PNGAPI
-png_get_signature(png_structp png_ptr, png_infop info_ptr)
+png_const_bytep PNGAPI
+png_get_signature(png_const_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->signature);
- else
- return (NULL);
+
+ return (NULL);
}
#ifdef PNG_bKGD_SUPPORTED
png_uint_32 PNGAPI
-png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
+png_get_bKGD(png_const_structp png_ptr, png_infop info_ptr,
png_color_16p *background)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
- && background != NULL)
+ && background != NULL)
{
png_debug1(1, "in %s retrieval function", "bKGD");
*background = &(info_ptr->background);
return (PNG_INFO_bKGD);
}
+
return (0);
}
#endif
#ifdef PNG_cHRM_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
+# ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
-png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
- double *white_x, double *white_y, double *red_x, double *red_y,
- double *green_x, double *green_y, double *blue_x, double *blue_y)
+png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr,
+ double *white_x, double *white_y, double *red_x, double *red_y,
+ double *green_x, double *green_y, double *blue_x, double *blue_y)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
{
png_debug1(1, "in %s retrieval function", "cHRM");
if (white_x != NULL)
- *white_x = (double)info_ptr->x_white;
+ *white_x = png_float(png_ptr, info_ptr->x_white, "cHRM white X");
if (white_y != NULL)
- *white_y = (double)info_ptr->y_white;
+ *white_y = png_float(png_ptr, info_ptr->y_white, "cHRM white Y");
if (red_x != NULL)
- *red_x = (double)info_ptr->x_red;
+ *red_x = png_float(png_ptr, info_ptr->x_red, "cHRM red X");
if (red_y != NULL)
- *red_y = (double)info_ptr->y_red;
+ *red_y = png_float(png_ptr, info_ptr->y_red, "cHRM red Y");
if (green_x != NULL)
- *green_x = (double)info_ptr->x_green;
+ *green_x = png_float(png_ptr, info_ptr->x_green, "cHRM green X");
if (green_y != NULL)
- *green_y = (double)info_ptr->y_green;
+ *green_y = png_float(png_ptr, info_ptr->y_green, "cHRM green Y");
if (blue_x != NULL)
- *blue_x = (double)info_ptr->x_blue;
+ *blue_x = png_float(png_ptr, info_ptr->x_blue, "cHRM blue X");
if (blue_y != NULL)
- *blue_y = (double)info_ptr->y_blue;
+ *blue_y = png_float(png_ptr, info_ptr->y_blue, "cHRM blue Y");
return (PNG_INFO_cHRM);
}
+
return (0);
}
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
+# endif
+
+# ifdef PNG_FIXED_POINT_SUPPORTED
png_uint_32 PNGAPI
-png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
- png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
- png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
- png_fixed_point *blue_x, png_fixed_point *blue_y)
+png_get_cHRM_fixed(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
+ png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
+ png_fixed_point *blue_x, png_fixed_point *blue_y)
{
png_debug1(1, "in %s retrieval function", "cHRM");
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
{
if (white_x != NULL)
- *white_x = info_ptr->int_x_white;
+ *white_x = info_ptr->x_white;
if (white_y != NULL)
- *white_y = info_ptr->int_y_white;
+ *white_y = info_ptr->y_white;
if (red_x != NULL)
- *red_x = info_ptr->int_x_red;
+ *red_x = info_ptr->x_red;
if (red_y != NULL)
- *red_y = info_ptr->int_y_red;
+ *red_y = info_ptr->y_red;
if (green_x != NULL)
- *green_x = info_ptr->int_x_green;
+ *green_x = info_ptr->x_green;
if (green_y != NULL)
- *green_y = info_ptr->int_y_green;
+ *green_y = info_ptr->y_green;
if (blue_x != NULL)
- *blue_x = info_ptr->int_x_blue;
+ *blue_x = info_ptr->x_blue;
if (blue_y != NULL)
- *blue_y = info_ptr->int_y_blue;
+ *blue_y = info_ptr->y_blue;
return (PNG_INFO_cHRM);
}
+
return (0);
}
-#endif
+# endif
#endif
#ifdef PNG_gAMA_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
+png_uint_32 PNGFAPI
+png_get_gAMA_fixed(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_fixed_point *file_gamma)
{
png_debug1(1, "in %s retrieval function", "gAMA");
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
- && file_gamma != NULL)
+ && file_gamma != NULL)
{
- *file_gamma = (double)info_ptr->gamma;
+ *file_gamma = info_ptr->gamma;
return (PNG_INFO_gAMA);
}
+
return (0);
}
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
+# ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
-png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
- png_fixed_point *int_file_gamma)
+png_get_gAMA(png_const_structp png_ptr, png_const_infop info_ptr,
+ double *file_gamma)
{
- png_debug1(1, "in %s retrieval function", "gAMA");
+ png_fixed_point igamma;
+ png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma);
- if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
- && int_file_gamma != NULL)
- {
- *int_file_gamma = info_ptr->int_gamma;
- return (PNG_INFO_gAMA);
- }
- return (0);
+ if (ok)
+ *file_gamma = png_float(png_ptr, igamma, "png_get_gAMA");
+
+ return ok;
}
-#endif
+
+# endif
#endif
#ifdef PNG_sRGB_SUPPORTED
png_uint_32 PNGAPI
-png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
+png_get_sRGB(png_const_structp png_ptr, png_const_infop info_ptr,
+ int *file_srgb_intent)
{
png_debug1(1, "in %s retrieval function", "sRGB");
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
- && file_srgb_intent != NULL)
+ && file_srgb_intent != NULL)
{
*file_srgb_intent = (int)info_ptr->srgb_intent;
return (PNG_INFO_sRGB);
}
+
return (0);
}
#endif
#ifdef PNG_iCCP_SUPPORTED
png_uint_32 PNGAPI
-png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
- png_charpp name, int *compression_type,
- png_charpp profile, png_uint_32 *proflen)
+png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_charpp name, int *compression_type,
+ png_bytepp profile, png_uint_32 *proflen)
{
png_debug1(1, "in %s retrieval function", "iCCP");
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
- && name != NULL && profile != NULL && proflen != NULL)
+ && name != NULL && profile != NULL && proflen != NULL)
{
*name = info_ptr->iccp_name;
*profile = info_ptr->iccp_profile;
*compression_type = (int)info_ptr->iccp_compression;
return (PNG_INFO_iCCP);
}
+
return (0);
}
#endif
#ifdef PNG_sPLT_SUPPORTED
png_uint_32 PNGAPI
-png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
- png_sPLT_tpp spalettes)
+png_get_sPLT(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_sPLT_tpp spalettes)
{
if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
{
- *spalettes = info_ptr->splt_palettes;
- return ((png_uint_32)info_ptr->splt_palettes_num);
+ *spalettes = info_ptr->splt_palettes;
+ return ((png_uint_32)info_ptr->splt_palettes_num);
}
+
return (0);
}
#endif
#ifdef PNG_hIST_SUPPORTED
png_uint_32 PNGAPI
-png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
+png_get_hIST(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_16p *hist)
{
png_debug1(1, "in %s retrieval function", "hIST");
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
- && hist != NULL)
+ && hist != NULL)
{
*hist = info_ptr->hist;
return (PNG_INFO_hIST);
}
+
return (0);
}
#endif
png_uint_32 PNGAPI
png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 *width, png_uint_32 *height, int *bit_depth,
- int *color_type, int *interlace_type, int *compression_type,
- int *filter_type)
+ png_uint_32 *width, png_uint_32 *height, int *bit_depth,
+ int *color_type, int *interlace_type, int *compression_type,
+ int *filter_type)
{
png_debug1(1, "in %s retrieval function", "IHDR");
#ifdef PNG_oFFs_SUPPORTED
png_uint_32 PNGAPI
-png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
- png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
+png_get_oFFs(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
{
png_debug1(1, "in %s retrieval function", "oFFs");
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
- && offset_x != NULL && offset_y != NULL && unit_type != NULL)
+ && offset_x != NULL && offset_y != NULL && unit_type != NULL)
{
*offset_x = info_ptr->x_offset;
*offset_y = info_ptr->y_offset;
*unit_type = (int)info_ptr->offset_unit_type;
return (PNG_INFO_oFFs);
}
+
return (0);
}
#endif
#ifdef PNG_pCAL_SUPPORTED
png_uint_32 PNGAPI
-png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
- png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
- png_charp *units, png_charpp *params)
+png_get_pCAL(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
+ png_charp *units, png_charpp *params)
{
png_debug1(1, "in %s retrieval function", "pCAL");
*params = info_ptr->pcal_params;
return (PNG_INFO_pCAL);
}
+
return (0);
}
#endif
#ifdef PNG_sCAL_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
+# ifdef PNG_FIXED_POINT_SUPPORTED
+# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
+png_uint_32 PNGAPI
+png_get_sCAL_fixed(png_structp png_ptr, png_const_infop info_ptr,
+ int *unit, png_fixed_point *width, png_fixed_point *height)
+{
+ if (png_ptr != NULL && info_ptr != NULL &&
+ (info_ptr->valid & PNG_INFO_sCAL))
+ {
+ *unit = info_ptr->scal_unit;
+ /*TODO: make this work without FP support */
+ *width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width");
+ *height = png_fixed(png_ptr, atof(info_ptr->scal_s_height),
+ "sCAL height");
+ return (PNG_INFO_sCAL);
+ }
+
+ return(0);
+}
+# endif /* FLOATING_ARITHMETIC */
+# endif /* FIXED_POINT */
+# ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
-png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
- int *unit, double *width, double *height)
+png_get_sCAL(png_const_structp png_ptr, png_const_infop info_ptr,
+ int *unit, double *width, double *height)
{
- if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_sCAL))
- {
- *unit = info_ptr->scal_unit;
- *width = info_ptr->scal_pixel_width;
- *height = info_ptr->scal_pixel_height;
- return (PNG_INFO_sCAL);
- }
- return(0);
+ if (png_ptr != NULL && info_ptr != NULL &&
+ (info_ptr->valid & PNG_INFO_sCAL))
+ {
+ *unit = info_ptr->scal_unit;
+ *width = atof(info_ptr->scal_s_width);
+ *height = atof(info_ptr->scal_s_height);
+ return (PNG_INFO_sCAL);
+ }
+
+ return(0);
}
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
+# endif /* FLOATING POINT */
png_uint_32 PNGAPI
-png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
- int *unit, png_charpp width, png_charpp height)
+png_get_sCAL_s(png_const_structp png_ptr, png_const_infop info_ptr,
+ int *unit, png_charpp width, png_charpp height)
{
- if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_sCAL))
- {
- *unit = info_ptr->scal_unit;
- *width = info_ptr->scal_s_width;
- *height = info_ptr->scal_s_height;
- return (PNG_INFO_sCAL);
- }
- return(0);
+ if (png_ptr != NULL && info_ptr != NULL &&
+ (info_ptr->valid & PNG_INFO_sCAL))
+ {
+ *unit = info_ptr->scal_unit;
+ *width = info_ptr->scal_s_width;
+ *height = info_ptr->scal_s_height;
+ return (PNG_INFO_sCAL);
+ }
+
+ return(0);
}
-#endif
-#endif
-#endif
+#endif /* sCAL */
#ifdef PNG_pHYs_SUPPORTED
png_uint_32 PNGAPI
-png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
+png_get_pHYs(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
{
png_uint_32 retval = 0;
png_debug1(1, "in %s retrieval function", "pHYs");
if (png_ptr != NULL && info_ptr != NULL &&
- (info_ptr->valid & PNG_INFO_pHYs))
+ (info_ptr->valid & PNG_INFO_pHYs))
{
if (res_x != NULL)
{
retval |= PNG_INFO_pHYs;
}
}
+
return (retval);
}
-#endif
+#endif /* pHYs */
png_uint_32 PNGAPI
-png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
- int *num_palette)
+png_get_PLTE(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_colorp *palette, int *num_palette)
{
png_debug1(1, "in %s retrieval function", "PLTE");
png_debug1(3, "num_palette = %d", *num_palette);
return (PNG_INFO_PLTE);
}
+
return (0);
}
#ifdef PNG_sBIT_SUPPORTED
png_uint_32 PNGAPI
-png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
+png_get_sBIT(png_const_structp png_ptr, png_infop info_ptr,
+ png_color_8p *sig_bit)
{
png_debug1(1, "in %s retrieval function", "sBIT");
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
- && sig_bit != NULL)
+ && sig_bit != NULL)
{
*sig_bit = &(info_ptr->sig_bit);
return (PNG_INFO_sBIT);
}
+
return (0);
}
#endif
#ifdef PNG_TEXT_SUPPORTED
png_uint_32 PNGAPI
-png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
- int *num_text)
+png_get_text(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_textp *text_ptr, int *num_text)
{
if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
{
png_debug1(1, "in %s retrieval function",
- (png_ptr->chunk_name[0] == '\0' ? "text"
- : (png_const_charp)png_ptr->chunk_name));
+ (png_ptr->chunk_name[0] == '\0' ? "text" :
+ (png_const_charp)png_ptr->chunk_name));
if (text_ptr != NULL)
*text_ptr = info_ptr->text;
return ((png_uint_32)info_ptr->num_text);
}
+
if (num_text != NULL)
- *num_text = 0;
+ *num_text = 0;
+
return(0);
}
#endif
#ifdef PNG_tIME_SUPPORTED
png_uint_32 PNGAPI
-png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
+png_get_tIME(png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
{
png_debug1(1, "in %s retrieval function", "tIME");
*mod_time = &(info_ptr->mod_time);
return (PNG_INFO_tIME);
}
+
return (0);
}
#endif
#ifdef PNG_tRNS_SUPPORTED
png_uint_32 PNGAPI
-png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
- png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)
+png_get_tRNS(png_const_structp png_ptr, png_infop info_ptr,
+ png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)
{
png_uint_32 retval = 0;
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
- if (trans_alpha != NULL)
- {
- *trans_alpha = info_ptr->trans_alpha;
- retval |= PNG_INFO_tRNS;
- }
-
- if (trans_color != NULL)
- *trans_color = &(info_ptr->trans_color);
+ if (trans_alpha != NULL)
+ {
+ *trans_alpha = info_ptr->trans_alpha;
+ retval |= PNG_INFO_tRNS;
+ }
+
+ if (trans_color != NULL)
+ *trans_color = &(info_ptr->trans_color);
}
+
else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
{
- if (trans_color != NULL)
- {
- *trans_color = &(info_ptr->trans_color);
- retval |= PNG_INFO_tRNS;
- }
-
- if (trans_alpha != NULL)
- *trans_alpha = NULL;
+ if (trans_color != NULL)
+ {
+ *trans_color = &(info_ptr->trans_color);
+ retval |= PNG_INFO_tRNS;
+ }
+
+ if (trans_alpha != NULL)
+ *trans_alpha = NULL;
}
+
if (num_trans != NULL)
{
*num_trans = info_ptr->num_trans;
retval |= PNG_INFO_tRNS;
}
}
+
return (retval);
}
#endif
#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
-png_uint_32 PNGAPI
-png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
- png_unknown_chunkpp unknowns)
+int PNGAPI
+png_get_unknown_chunks(png_const_structp png_ptr, png_const_infop info_ptr,
+ png_unknown_chunkpp unknowns)
{
if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
{
- *unknowns = info_ptr->unknown_chunks;
- return ((png_uint_32)info_ptr->unknown_chunks_num);
+ *unknowns = info_ptr->unknown_chunks;
+ return info_ptr->unknown_chunks_num;
}
+
return (0);
}
#endif
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
png_byte PNGAPI
-png_get_rgb_to_gray_status (png_structp png_ptr)
+png_get_rgb_to_gray_status (png_const_structp png_ptr)
{
- return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
+ return (png_byte)(png_ptr ? png_ptr->rgb_to_gray_status : 0);
}
#endif
#ifdef PNG_USER_CHUNKS_SUPPORTED
png_voidp PNGAPI
-png_get_user_chunk_ptr(png_structp png_ptr)
+png_get_user_chunk_ptr(png_const_structp png_ptr)
{
- return (png_ptr? png_ptr->user_chunk_ptr : NULL);
+ return (png_ptr ? png_ptr->user_chunk_ptr : NULL);
}
#endif
png_size_t PNGAPI
-png_get_compression_buffer_size(png_structp png_ptr)
+png_get_compression_buffer_size(png_const_structp png_ptr)
{
return (png_ptr ? png_ptr->zbuf_size : 0L);
}
/* These functions were added to libpng 1.2.6 and were enabled
* by default in libpng-1.4.0 */
png_uint_32 PNGAPI
-png_get_user_width_max (png_structp png_ptr)
+png_get_user_width_max (png_const_structp png_ptr)
{
- return (png_ptr? png_ptr->user_width_max : 0);
+ return (png_ptr ? png_ptr->user_width_max : 0);
}
+
png_uint_32 PNGAPI
-png_get_user_height_max (png_structp png_ptr)
+png_get_user_height_max (png_const_structp png_ptr)
{
- return (png_ptr? png_ptr->user_height_max : 0);
+ return (png_ptr ? png_ptr->user_height_max : 0);
}
+
/* This function was added to libpng 1.4.0 */
png_uint_32 PNGAPI
-png_get_chunk_cache_max (png_structp png_ptr)
+png_get_chunk_cache_max (png_const_structp png_ptr)
{
- return (png_ptr? png_ptr->user_chunk_cache_max : 0);
+ return (png_ptr ? png_ptr->user_chunk_cache_max : 0);
}
+
/* This function was added to libpng 1.4.1 */
png_alloc_size_t PNGAPI
-png_get_chunk_malloc_max (png_structp png_ptr)
+png_get_chunk_malloc_max (png_const_structp png_ptr)
{
- return (png_ptr?
- png_ptr->user_chunk_malloc_max : 0);
+ return (png_ptr ? png_ptr->user_chunk_malloc_max : 0);
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
png_uint_32 PNGAPI
png_get_io_state (png_structp png_ptr)
{
- return png_ptr->io_state;
+ return png_ptr->io_state;
+}
+
+png_uint_32 PNGAPI
+png_get_io_chunk_type (png_const_structp png_ptr)
+{
+ return ((png_ptr->chunk_name[0] << 24) +
+ (png_ptr->chunk_name[1] << 16) +
+ (png_ptr->chunk_name[2] << 8) +
+ (png_ptr->chunk_name[3]));
}
-png_bytep PNGAPI
+png_const_bytep PNGAPI
png_get_io_chunk_name (png_structp png_ptr)
{
return png_ptr->chunk_name;
--- /dev/null
+
+/* pnginfo.h - header file for PNG reference library
+ *
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+ /* png_info is a structure that holds the information in a PNG file so
+ * that the application can find out the characteristics of the image.
+ * If you are reading the file, this structure will tell you what is
+ * in the PNG file. If you are writing the file, fill in the information
+ * you want to put into the PNG file, using png_set_*() functions, then
+ * call png_write_info().
+ *
+ * The names chosen should be very close to the PNG specification, so
+ * consult that document for information about the meaning of each field.
+ *
+ * With libpng < 0.95, it was only possible to directly set and read the
+ * the values in the png_info_struct, which meant that the contents and
+ * order of the values had to remain fixed. With libpng 0.95 and later,
+ * however, there are now functions that abstract the contents of
+ * png_info_struct from the application, so this makes it easier to use
+ * libpng with dynamic libraries, and even makes it possible to use
+ * libraries that don't have all of the libpng ancillary chunk-handing
+ * functionality. In libpng-1.5.0 this was moved into a separate private
+ * file that is not visible to applications.
+ *
+ * The following members may have allocated storage attached that should be
+ * cleaned up before the structure is discarded: palette, trans, text,
+ * pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile,
+ * splt_palettes, scal_unit, row_pointers, and unknowns. By default, these
+ * are automatically freed when the info structure is deallocated, if they were
+ * allocated internally by libpng. This behavior can be changed by means
+ * of the png_data_freer() function.
+ *
+ * More allocation details: all the chunk-reading functions that
+ * change these members go through the corresponding png_set_*
+ * functions. A function to clear these members is available: see
+ * png_free_data(). The png_set_* functions do not depend on being
+ * able to point info structure members to any of the storage they are
+ * passed (they make their own copies), EXCEPT that the png_set_text
+ * functions use the same storage passed to them in the text_ptr or
+ * itxt_ptr structure argument, and the png_set_rows and png_set_unknowns
+ * functions do not make their own copies.
+ */
+#ifndef PNGINFO_H
+#define PNGINFO_H
+
+struct png_info_def
+{
+ /* the following are necessary for every PNG file */
+ png_uint_32 width; /* width of image in pixels (from IHDR) */
+ png_uint_32 height; /* height of image in pixels (from IHDR) */
+ png_uint_32 valid; /* valid chunk data (see PNG_INFO_ below) */
+ png_size_t rowbytes; /* bytes needed to hold an untransformed row */
+ png_colorp palette; /* array of color values (valid & PNG_INFO_PLTE) */
+ png_uint_16 num_palette; /* number of color entries in "palette" (PLTE) */
+ png_uint_16 num_trans; /* number of transparent palette color (tRNS) */
+ png_byte bit_depth; /* 1, 2, 4, 8, or 16 bits/channel (from IHDR) */
+ png_byte color_type; /* see PNG_COLOR_TYPE_ below (from IHDR) */
+ /* The following three should have been named *_method not *_type */
+ png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */
+ png_byte filter_type; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */
+ png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
+
+ /* The following is informational only on read, and not used on writes. */
+ png_byte channels; /* number of data channels per pixel (1, 2, 3, 4) */
+ png_byte pixel_depth; /* number of bits per pixel */
+ png_byte spare_byte; /* to align the data, and for future use */
+ png_byte signature[8]; /* magic bytes read by libpng from start of file */
+
+ /* The rest of the data is optional. If you are reading, check the
+ * valid field to see if the information in these are valid. If you
+ * are writing, set the valid field to those chunks you want written,
+ * and initialize the appropriate fields below.
+ */
+
+#if defined(PNG_gAMA_SUPPORTED)
+ /* The gAMA chunk describes the gamma characteristics of the system
+ * on which the image was created, normally in the range [1.0, 2.5].
+ * Data is valid if (valid & PNG_INFO_gAMA) is non-zero.
+ */
+ png_fixed_point gamma;
+#endif
+
+#ifdef PNG_sRGB_SUPPORTED
+ /* GR-P, 0.96a */
+ /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */
+ png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */
+#endif
+
+#ifdef PNG_TEXT_SUPPORTED
+ /* The tEXt, and zTXt chunks contain human-readable textual data in
+ * uncompressed, compressed, and optionally compressed forms, respectively.
+ * The data in "text" is an array of pointers to uncompressed,
+ * null-terminated C strings. Each chunk has a keyword that describes the
+ * textual data contained in that chunk. Keywords are not required to be
+ * unique, and the text string may be empty. Any number of text chunks may
+ * be in an image.
+ */
+ int num_text; /* number of comments read or comments to write */
+ int max_text; /* current size of text array */
+ png_textp text; /* array of comments read or comments to write */
+#endif /* PNG_TEXT_SUPPORTED */
+
+#ifdef PNG_tIME_SUPPORTED
+ /* The tIME chunk holds the last time the displayed image data was
+ * modified. See the png_time struct for the contents of this struct.
+ */
+ png_time mod_time;
+#endif
+
+#ifdef PNG_sBIT_SUPPORTED
+ /* The sBIT chunk specifies the number of significant high-order bits
+ * in the pixel data. Values are in the range [1, bit_depth], and are
+ * only specified for the channels in the pixel data. The contents of
+ * the low-order bits is not specified. Data is valid if
+ * (valid & PNG_INFO_sBIT) is non-zero.
+ */
+ png_color_8 sig_bit; /* significant bits in color channels */
+#endif
+
+#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \
+defined(PNG_READ_BACKGROUND_SUPPORTED)
+ /* The tRNS chunk supplies transparency data for paletted images and
+ * other image types that don't need a full alpha channel. There are
+ * "num_trans" transparency values for a paletted image, stored in the
+ * same order as the palette colors, starting from index 0. Values
+ * for the data are in the range [0, 255], ranging from fully transparent
+ * to fully opaque, respectively. For non-paletted images, there is a
+ * single color specified that should be treated as fully transparent.
+ * Data is valid if (valid & PNG_INFO_tRNS) is non-zero.
+ */
+ png_bytep trans; /* alpha values for paletted image */
+ png_bytep trans_alpha; /* alpha values for paletted image */
+ png_color_16 trans_color; /* transparent color for non-palette image */
+#endif
+
+#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ /* The bKGD chunk gives the suggested image background color if the
+ * display program does not have its own background color and the image
+ * is needs to composited onto a background before display. The colors
+ * in "background" are normally in the same color space/depth as the
+ * pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero.
+ */
+ png_color_16 background;
+#endif
+
+#ifdef PNG_oFFs_SUPPORTED
+ /* The oFFs chunk gives the offset in "offset_unit_type" units rightwards
+ * and downwards from the top-left corner of the display, page, or other
+ * application-specific co-ordinate space. See the PNG_OFFSET_ defines
+ * below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero.
+ */
+ png_int_32 x_offset; /* x offset on page */
+ png_int_32 y_offset; /* y offset on page */
+ png_byte offset_unit_type; /* offset units type */
+#endif
+
+#ifdef PNG_pHYs_SUPPORTED
+ /* The pHYs chunk gives the physical pixel density of the image for
+ * display or printing in "phys_unit_type" units (see PNG_RESOLUTION_
+ * defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero.
+ */
+ png_uint_32 x_pixels_per_unit; /* horizontal pixel density */
+ png_uint_32 y_pixels_per_unit; /* vertical pixel density */
+ png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */
+#endif
+
+#ifdef PNG_hIST_SUPPORTED
+ /* The hIST chunk contains the relative frequency or importance of the
+ * various palette entries, so that a viewer can intelligently select a
+ * reduced-color palette, if required. Data is an array of "num_palette"
+ * values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST)
+ * is non-zero.
+ */
+ png_uint_16p hist;
+#endif
+
+#ifdef PNG_cHRM_SUPPORTED
+ /* The cHRM chunk describes the CIE color characteristics of the monitor
+ * on which the PNG was created. This data allows the viewer to do gamut
+ * mapping of the input image to ensure that the viewer sees the same
+ * colors in the image as the creator. Values are in the range
+ * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero.
+ */
+ png_fixed_point x_white;
+ png_fixed_point y_white;
+ png_fixed_point x_red;
+ png_fixed_point y_red;
+ png_fixed_point x_green;
+ png_fixed_point y_green;
+ png_fixed_point x_blue;
+ png_fixed_point y_blue;
+#endif
+
+#ifdef PNG_pCAL_SUPPORTED
+ /* The pCAL chunk describes a transformation between the stored pixel
+ * values and original physical data values used to create the image.
+ * The integer range [0, 2^bit_depth - 1] maps to the floating-point
+ * range given by [pcal_X0, pcal_X1], and are further transformed by a
+ * (possibly non-linear) transformation function given by "pcal_type"
+ * and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_
+ * defines below, and the PNG-Group's PNG extensions document for a
+ * complete description of the transformations and how they should be
+ * implemented, and for a description of the ASCII parameter strings.
+ * Data values are valid if (valid & PNG_INFO_pCAL) non-zero.
+ */
+ png_charp pcal_purpose; /* pCAL chunk description string */
+ png_int_32 pcal_X0; /* minimum value */
+ png_int_32 pcal_X1; /* maximum value */
+ png_charp pcal_units; /* Latin-1 string giving physical units */
+ png_charpp pcal_params; /* ASCII strings containing parameter values */
+ png_byte pcal_type; /* equation type (see PNG_EQUATION_ below) */
+ png_byte pcal_nparams; /* number of parameters given in pcal_params */
+#endif
+
+/* New members added in libpng-1.0.6 */
+ png_uint_32 free_me; /* flags items libpng is responsible for freeing */
+
+#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
+ defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
+ /* Storage for unknown chunks that the library doesn't recognize. */
+ png_unknown_chunkp unknown_chunks;
+ int unknown_chunks_num;
+#endif
+
+#ifdef PNG_iCCP_SUPPORTED
+ /* iCCP chunk data. */
+ png_charp iccp_name; /* profile name */
+ png_bytep iccp_profile; /* International Color Consortium profile data */
+ png_uint_32 iccp_proflen; /* ICC profile data length */
+ png_byte iccp_compression; /* Always zero */
+#endif
+
+#ifdef PNG_sPLT_SUPPORTED
+ /* Data on sPLT chunks (there may be more than one). */
+ png_sPLT_tp splt_palettes;
+ png_uint_32 splt_palettes_num;
+#endif
+
+#ifdef PNG_sCAL_SUPPORTED
+ /* The sCAL chunk describes the actual physical dimensions of the
+ * subject matter of the graphic. The chunk contains a unit specification
+ * a byte value, and two ASCII strings representing floating-point
+ * values. The values are width and height corresponsing to one pixel
+ * in the image. Data values are valid if (valid & PNG_INFO_sCAL) is
+ * non-zero.
+ */
+ png_byte scal_unit; /* unit of physical scale */
+ png_charp scal_s_width; /* string containing height */
+ png_charp scal_s_height; /* string containing width */
+#endif
+
+#ifdef PNG_INFO_IMAGE_SUPPORTED
+ /* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS)
+ non-zero */
+ /* Data valid if (valid & PNG_INFO_IDAT) non-zero */
+ png_bytepp row_pointers; /* the image bits */
+#endif
+
+};
+#endif /* PNGINFO_H */
--- /dev/null
+
+/* libpng STANDARD API DEFINITION */
+
+/* pnglibconf.h - library build configuration */
+
+/* libpng version 1.5.0 - last changed on February 11, 2011 */
+
+/* Copyright (c) 1998-2011 Glenn Randers-Pehrson */
+
+/* This code is released under the libpng license. */
+/* For conditions of distribution and use, see the disclaimer */
+/* and license in png.h */
+
+/* pnglibconf.h */
+/* Derived from: scripts/pnglibconf.dfa */
+/* If you edit this file by hand you must obey the rules expressed in */
+/* pnglibconf.dfa with respect to the dependencies between the following */
+/* symbols. It is much better to generate a new file using */
+/* scripts/libpngconf.mak */
+
+#ifndef PNGLCONF_H
+#define PNGLCONF_H
+/* settings */
+#define PNG_API_RULE 0
+#define PNG_CALLOC_SUPPORTED
+#define PNG_COST_SHIFT 3
+#define PNG_DEFAULT_READ_MACROS 1
+#define PNG_GAMMA_THRESHOLD_FIXED 5000
+#define PNG_MAX_GAMMA_8 11
+#define PNG_QUANTIZE_BLUE_BITS 5
+#define PNG_QUANTIZE_GREEN_BITS 5
+#define PNG_QUANTIZE_RED_BITS 5
+#define PNG_sCAL_PRECISION 5
+#define PNG_USER_CHUNK_CACHE_MAX 0
+#define PNG_USER_CHUNK_MALLOC_MAX 0
+#define PNG_USER_HEIGHT_MAX 1000000L
+#define PNG_USER_WIDTH_MAX 1000000L
+#define PNG_WEIGHT_SHIFT 8
+#define PNG_ZBUF_SIZE 8192
+/* end of settings */
+/* options */
+#define PNG_16BIT_SUPPORTED
+#define PNG_ALIGN_MEMORY_SUPPORTED
+#define PNG_BENIGN_ERRORS_SUPPORTED
+#define PNG_bKGD_SUPPORTED
+#define PNG_CHECK_cHRM_SUPPORTED
+#define PNG_cHRM_SUPPORTED
+#define PNG_CONSOLE_IO_SUPPORTED
+#define PNG_CONVERT_tIME_SUPPORTED
+#define PNG_EASY_ACCESS_SUPPORTED
+#define PNG_ERROR_TEXT_SUPPORTED
+#define PNG_FIXED_POINT_SUPPORTED
+#define PNG_FLOATING_ARITHMETIC_SUPPORTED
+#define PNG_FLOATING_POINT_SUPPORTED
+#define PNG_gAMA_SUPPORTED
+#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+#define PNG_hIST_SUPPORTED
+#define PNG_iCCP_SUPPORTED
+#define PNG_INCH_CONVERSIONS_SUPPORTED
+#define PNG_INFO_IMAGE_SUPPORTED
+#define PNG_IO_STATE_SUPPORTED
+#define PNG_iTXt_SUPPORTED
+#define PNG_MNG_FEATURES_SUPPORTED
+#define PNG_oFFs_SUPPORTED
+#define PNG_pCAL_SUPPORTED
+#define PNG_pHYs_SUPPORTED
+#define PNG_POINTER_INDEXING_SUPPORTED
+#define PNG_PROGRESSIVE_READ_SUPPORTED
+#define PNG_READ_16BIT_SUPPORTED
+#define PNG_READ_16_TO_8_SUPPORTED
+#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
+#define PNG_READ_BACKGROUND_SUPPORTED
+#define PNG_READ_BGR_SUPPORTED
+#define PNG_READ_bKGD_SUPPORTED
+#define PNG_READ_cHRM_SUPPORTED
+#define PNG_READ_COMPOSITE_NODIV_SUPPORTED
+#define PNG_READ_EXPAND_16_SUPPORTED
+#define PNG_READ_EXPAND_SUPPORTED
+#define PNG_READ_FILLER_SUPPORTED
+#define PNG_READ_gAMA_SUPPORTED
+#define PNG_READ_GAMMA_SUPPORTED
+#define PNG_READ_GRAY_TO_RGB_SUPPORTED
+#define PNG_READ_hIST_SUPPORTED
+#define PNG_READ_iCCP_SUPPORTED
+#define PNG_READ_INTERLACING_SUPPORTED
+#define PNG_READ_INT_FUNCTIONS_SUPPORTED
+#define PNG_READ_INVERT_ALPHA_SUPPORTED
+#define PNG_READ_INVERT_SUPPORTED
+#define PNG_READ_iTXt_SUPPORTED
+#define PNG_READ_oFFs_SUPPORTED
+#define PNG_READ_OPT_PLTE_SUPPORTED
+#define PNG_READ_PACK_SUPPORTED
+#define PNG_READ_PACKSWAP_SUPPORTED
+#define PNG_READ_pCAL_SUPPORTED
+#define PNG_READ_pHYs_SUPPORTED
+#define PNG_READ_QUANTIZE_SUPPORTED
+#define PNG_READ_RGB_TO_GRAY_SUPPORTED
+#define PNG_READ_sBIT_SUPPORTED
+#define PNG_READ_sCAL_SUPPORTED
+#define PNG_READ_SHIFT_SUPPORTED
+#define PNG_READ_sPLT_SUPPORTED
+#define PNG_READ_sRGB_SUPPORTED
+#define PNG_READ_STRIP_ALPHA_SUPPORTED
+#define PNG_READ_SUPPORTED
+#define PNG_READ_SWAP_ALPHA_SUPPORTED
+#define PNG_READ_SWAP_SUPPORTED
+#define PNG_READ_tEXt_SUPPORTED
+#define PNG_READ_TEXT_SUPPORTED
+#define PNG_READ_tIME_SUPPORTED
+#define PNG_READ_TRANSFORMS_SUPPORTED
+#define PNG_READ_tRNS_SUPPORTED
+#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
+#define PNG_READ_USER_CHUNKS_SUPPORTED
+#define PNG_READ_USER_TRANSFORM_SUPPORTED
+#define PNG_READ_zTXt_SUPPORTED
+#define PNG_SAVE_INT_32_SUPPORTED
+#define PNG_sBIT_SUPPORTED
+#define PNG_sCAL_SUPPORTED
+#define PNG_SEQUENTIAL_READ_SUPPORTED
+#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
+#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
+#define PNG_SETJMP_SUPPORTED
+#define PNG_SET_USER_LIMITS_SUPPORTED
+#define PNG_sPLT_SUPPORTED
+#define PNG_sRGB_SUPPORTED
+#define PNG_STDIO_SUPPORTED
+#define PNG_tEXt_SUPPORTED
+#define PNG_TEXT_SUPPORTED
+#define PNG_TIME_RFC1123_SUPPORTED
+#define PNG_tIME_SUPPORTED
+#define PNG_tRNS_SUPPORTED
+#define PNG_UNKNOWN_CHUNKS_SUPPORTED
+#define PNG_USER_CHUNKS_SUPPORTED
+#define PNG_USER_LIMITS_SUPPORTED
+#define PNG_USER_MEM_SUPPORTED
+#define PNG_USER_TRANSFORM_INFO_SUPPORTED
+#define PNG_USER_TRANSFORM_PTR_SUPPORTED
+#define PNG_WARNINGS_SUPPORTED
+#define PNG_WRITE_16BIT_SUPPORTED
+#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
+#define PNG_WRITE_BGR_SUPPORTED
+#define PNG_WRITE_bKGD_SUPPORTED
+#define PNG_WRITE_cHRM_SUPPORTED
+#define PNG_WRITE_FILLER_SUPPORTED
+#define PNG_WRITE_FILTER_SUPPORTED
+#define PNG_WRITE_FLUSH_SUPPORTED
+#define PNG_WRITE_gAMA_SUPPORTED
+#define PNG_WRITE_hIST_SUPPORTED
+#define PNG_WRITE_iCCP_SUPPORTED
+#define PNG_WRITE_INTERLACING_SUPPORTED
+#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED
+#define PNG_WRITE_INVERT_ALPHA_SUPPORTED
+#define PNG_WRITE_INVERT_SUPPORTED
+#define PNG_WRITE_iTXt_SUPPORTED
+#define PNG_WRITE_oFFs_SUPPORTED
+#define PNG_WRITE_PACK_SUPPORTED
+#define PNG_WRITE_PACKSWAP_SUPPORTED
+#define PNG_WRITE_pCAL_SUPPORTED
+#define PNG_WRITE_pHYs_SUPPORTED
+#define PNG_WRITE_sBIT_SUPPORTED
+#define PNG_WRITE_sCAL_SUPPORTED
+#define PNG_WRITE_SHIFT_SUPPORTED
+#define PNG_WRITE_sPLT_SUPPORTED
+#define PNG_WRITE_sRGB_SUPPORTED
+#define PNG_WRITE_SUPPORTED
+#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
+#define PNG_WRITE_SWAP_SUPPORTED
+#define PNG_WRITE_tEXt_SUPPORTED
+#define PNG_WRITE_TEXT_SUPPORTED
+#define PNG_WRITE_tIME_SUPPORTED
+#define PNG_WRITE_TRANSFORMS_SUPPORTED
+#define PNG_WRITE_tRNS_SUPPORTED
+#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+#define PNG_WRITE_USER_TRANSFORM_SUPPORTED
+#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+#define PNG_WRITE_zTXt_SUPPORTED
+#define PNG_zTXt_SUPPORTED
+/*#undef PNG_ERROR_NUMBERS_SUPPORTED*/
+/*#undef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED*/
+/* end of options */
+#endif /* PNGLCONF_H */
/* pngmem.c - stub functions for memory allocation
*
- * Last changed in libpng 1.4.2 [May 6, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* identify the replacement functions.
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#include "pngpriv.h"
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
/* Borland DOS special memory handler */
#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
/* If you change this, be sure to change the one in png.h also */
/* Allocate memory for a png_struct. The malloc and memset can be replaced
by a single call to calloc() if this is thought to improve performance. */
-png_voidp /* PRIVATE */
-png_create_struct(int type)
+PNG_FUNCTION(png_voidp /* PRIVATE */,
+png_create_struct,(int type),PNG_ALLOCATED)
{
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
return (png_create_struct_2(type, NULL, NULL));
}
/* Alternate version of png_create_struct, for use with user-defined malloc. */
-png_voidp /* PRIVATE */
-png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
+PNG_FUNCTION(png_voidp /* PRIVATE */,
+png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr),
+ PNG_ALLOCATED)
{
-#endif /* PNG_USER_MEM_SUPPORTED */
+# endif /* PNG_USER_MEM_SUPPORTED */
png_size_t size;
png_voidp struct_ptr;
if (type == PNG_STRUCT_INFO)
size = png_sizeof(png_info);
+
else if (type == PNG_STRUCT_PNG)
size = png_sizeof(png_struct);
+
else
return (png_get_copyright(NULL));
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
if (malloc_fn != NULL)
{
png_struct dummy_struct;
png_ptr->mem_ptr=mem_ptr;
struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size);
}
+
else
-#endif /* PNG_USER_MEM_SUPPORTED */
+# endif /* PNG_USER_MEM_SUPPORTED */
struct_ptr = (png_voidp)farmalloc(size);
if (struct_ptr != NULL)
png_memset(struct_ptr, 0, size);
+
return (struct_ptr);
}
void /* PRIVATE */
png_destroy_struct(png_voidp struct_ptr)
{
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2(struct_ptr, NULL, NULL);
}
png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
png_voidp mem_ptr)
{
-#endif
+# endif
if (struct_ptr != NULL)
{
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
if (free_fn != NULL)
{
png_struct dummy_struct;
(*(free_fn))(png_ptr, struct_ptr);
return;
}
-#endif /* PNG_USER_MEM_SUPPORTED */
+
+# endif /* PNG_USER_MEM_SUPPORTED */
farfree (struct_ptr);
}
}
* result, we would be truncating potentially larger memory requests
* (which should cause a fatal error) and introducing major problems.
*/
-png_voidp PNGAPI
-png_calloc(png_structp png_ptr, png_alloc_size_t size)
+PNG_FUNCTION(png_voidp,PNGAPI
+png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
{
png_voidp ret;
ret = (png_malloc(png_ptr, size));
+
if (ret != NULL)
png_memset(ret,0,(png_size_t)size);
+
return (ret);
}
-png_voidp PNGAPI
-png_malloc(png_structp png_ptr, png_alloc_size_t size)
+PNG_FUNCTION(png_voidp,PNGAPI
+png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
{
png_voidp ret;
if (png_ptr == NULL || size == 0)
return (NULL);
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
if (png_ptr->malloc_fn != NULL)
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
+
else
ret = (png_malloc_default(png_ptr, size));
+
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of memory");
+
return (ret);
}
-png_voidp PNGAPI
-png_malloc_default(png_structp png_ptr, png_alloc_size_t size)
+PNG_FUNCTION(png_voidp,PNGAPI
+png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
{
png_voidp ret;
-#endif /* PNG_USER_MEM_SUPPORTED */
+# endif /* PNG_USER_MEM_SUPPORTED */
if (png_ptr == NULL || size == 0)
return (NULL);
-#ifdef PNG_MAX_MALLOC_64K
+# ifdef PNG_MAX_MALLOC_64K
if (size > (png_uint_32)65536L)
{
png_warning(png_ptr, "Cannot Allocate > 64K");
ret = NULL;
}
+
else
-#endif
+# endif
if (size != (size_t)size)
ret = NULL;
+
else if (size == (png_uint_32)65536L)
{
if (png_ptr->offset_table == NULL)
if (png_ptr->zlib_window_bits > 14)
num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14));
+
else
num_blocks = 1;
+
if (png_ptr->zlib_mem_level >= 7)
num_blocks += (int)(1 << (png_ptr->zlib_mem_level - 7));
+
else
num_blocks++;
if (table == NULL)
{
-#ifndef PNG_USER_MEM_SUPPORTED
+# ifndef PNG_USER_MEM_SUPPORTED
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out Of Memory"); /* Note "O", "M" */
+
else
png_warning(png_ptr, "Out Of Memory");
-#endif
+# endif
return (NULL);
}
if ((png_size_t)table & 0xfff0)
{
-#ifndef PNG_USER_MEM_SUPPORTED
+# ifndef PNG_USER_MEM_SUPPORTED
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr,
"Farmalloc didn't return normalized pointer");
+
else
png_warning(png_ptr,
"Farmalloc didn't return normalized pointer");
-#endif
+# endif
return (NULL);
}
if (png_ptr->offset_table_ptr == NULL)
{
-#ifndef PNG_USER_MEM_SUPPORTED
+# ifndef PNG_USER_MEM_SUPPORTED
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out Of memory"); /* Note "O", "m" */
+
else
png_warning(png_ptr, "Out Of memory");
-#endif
+# endif
return (NULL);
}
hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L);
hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */
}
+
for (i = 0; i < num_blocks; i++)
{
png_ptr->offset_table_ptr[i] = (png_bytep)hptr;
if (png_ptr->offset_table_count >= png_ptr->offset_table_number)
{
-#ifndef PNG_USER_MEM_SUPPORTED
+# ifndef PNG_USER_MEM_SUPPORTED
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of Memory"); /* Note "o" and "M" */
+
else
png_warning(png_ptr, "Out of Memory");
-#endif
+# endif
return (NULL);
}
ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++];
}
+
else
ret = farmalloc(size);
-#ifndef PNG_USER_MEM_SUPPORTED
+# ifndef PNG_USER_MEM_SUPPORTED
if (ret == NULL)
{
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of memory"); /* Note "o" and "m" */
+
else
png_warning(png_ptr, "Out of memory"); /* Note "o" and "m" */
}
-#endif
+# endif
return (ret);
}
if (png_ptr == NULL || ptr == NULL)
return;
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
if (png_ptr->free_fn != NULL)
{
(*(png_ptr->free_fn))(png_ptr, ptr);
return;
}
+
else
png_free_default(png_ptr, ptr);
}
void PNGAPI
png_free_default(png_structp png_ptr, png_voidp ptr)
{
-#endif /* PNG_USER_MEM_SUPPORTED */
+# endif /* PNG_USER_MEM_SUPPORTED */
if (png_ptr == NULL || ptr == NULL)
return;
}
if (ptr != NULL)
- {
farfree(ptr);
- }
}
#else /* Not the Borland DOS special memory handler */
/* Allocate memory for a png_struct or a png_info. The malloc and
memset can be replaced by a single call to calloc() if this is thought
to improve performance noticably. */
-png_voidp /* PRIVATE */
-png_create_struct(int type)
+PNG_FUNCTION(png_voidp /* PRIVATE */,
+png_create_struct,(int type),PNG_ALLOCATED)
{
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
return (png_create_struct_2(type, NULL, NULL));
}
/* Allocate memory for a png_struct or a png_info. The malloc and
memset can be replaced by a single call to calloc() if this is thought
to improve performance noticably. */
-png_voidp /* PRIVATE */
-png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
+PNG_FUNCTION(png_voidp /* PRIVATE */,
+png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr),
+ PNG_ALLOCATED)
{
-#endif /* PNG_USER_MEM_SUPPORTED */
+# endif /* PNG_USER_MEM_SUPPORTED */
png_size_t size;
png_voidp struct_ptr;
if (type == PNG_STRUCT_INFO)
size = png_sizeof(png_info);
+
else if (type == PNG_STRUCT_PNG)
size = png_sizeof(png_struct);
+
else
return (NULL);
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
if (malloc_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
png_ptr->mem_ptr=mem_ptr;
struct_ptr = (*(malloc_fn))(png_ptr, size);
+
if (struct_ptr != NULL)
png_memset(struct_ptr, 0, size);
+
return (struct_ptr);
}
-#endif /* PNG_USER_MEM_SUPPORTED */
+# endif /* PNG_USER_MEM_SUPPORTED */
-#if defined(__TURBOC__) && !defined(__FLAT__)
+# if defined(__TURBOC__) && !defined(__FLAT__)
struct_ptr = (png_voidp)farmalloc(size);
-#else
-# if defined(_MSC_VER) && defined(MAXSEG_64K)
+# else
+# if defined(_MSC_VER) && defined(MAXSEG_64K)
struct_ptr = (png_voidp)halloc(size, 1);
-# else
+# else
struct_ptr = (png_voidp)malloc(size);
-# endif
-#endif
+# endif
+# endif
+
if (struct_ptr != NULL)
png_memset(struct_ptr, 0, size);
void /* PRIVATE */
png_destroy_struct(png_voidp struct_ptr)
{
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2(struct_ptr, NULL, NULL);
}
png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
png_voidp mem_ptr)
{
-#endif /* PNG_USER_MEM_SUPPORTED */
+# endif /* PNG_USER_MEM_SUPPORTED */
if (struct_ptr != NULL)
{
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
if (free_fn != NULL)
{
png_struct dummy_struct;
(*(free_fn))(png_ptr, struct_ptr);
return;
}
-#endif /* PNG_USER_MEM_SUPPORTED */
-#if defined(__TURBOC__) && !defined(__FLAT__)
+# endif /* PNG_USER_MEM_SUPPORTED */
+# if defined(__TURBOC__) && !defined(__FLAT__)
farfree(struct_ptr);
-#else
-# if defined(_MSC_VER) && defined(MAXSEG_64K)
+
+# else
+# if defined(_MSC_VER) && defined(MAXSEG_64K)
hfree(struct_ptr);
-# else
+
+# else
free(struct_ptr);
-# endif
-#endif
+
+# endif
+# endif
}
}
* have the ability to do that.
*/
-png_voidp PNGAPI
-png_calloc(png_structp png_ptr, png_alloc_size_t size)
+PNG_FUNCTION(png_voidp,PNGAPI
+png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
{
png_voidp ret;
ret = (png_malloc(png_ptr, size));
+
if (ret != NULL)
png_memset(ret,0,(png_size_t)size);
+
return (ret);
}
-png_voidp PNGAPI
-png_malloc(png_structp png_ptr, png_alloc_size_t size)
+PNG_FUNCTION(png_voidp,PNGAPI
+png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
{
png_voidp ret;
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
if (png_ptr == NULL || size == 0)
return (NULL);
if (png_ptr->malloc_fn != NULL)
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
+
else
ret = (png_malloc_default(png_ptr, size));
+
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of Memory");
+
return (ret);
}
-png_voidp PNGAPI
-png_malloc_default(png_structp png_ptr, png_alloc_size_t size)
+PNG_FUNCTION(png_voidp,PNGAPI
+png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
{
png_voidp ret;
-#endif /* PNG_USER_MEM_SUPPORTED */
+# endif /* PNG_USER_MEM_SUPPORTED */
if (png_ptr == NULL || size == 0)
return (NULL);
-#ifdef PNG_MAX_MALLOC_64K
+# ifdef PNG_MAX_MALLOC_64K
if (size > (png_uint_32)65536L)
{
-#ifndef PNG_USER_MEM_SUPPORTED
+# ifndef PNG_USER_MEM_SUPPORTED
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Cannot Allocate > 64K");
+
else
-#endif
+# endif
return NULL;
}
-#endif
+# endif
/* Check for overflow */
-#if defined(__TURBOC__) && !defined(__FLAT__)
+# if defined(__TURBOC__) && !defined(__FLAT__)
+
if (size != (unsigned long)size)
ret = NULL;
+
else
ret = farmalloc(size);
-#else
-# if defined(_MSC_VER) && defined(MAXSEG_64K)
+
+# else
+# if defined(_MSC_VER) && defined(MAXSEG_64K)
if (size != (unsigned long)size)
ret = NULL;
+
else
ret = halloc(size, 1);
-# else
+
+# else
if (size != (size_t)size)
ret = NULL;
+
else
ret = malloc((size_t)size);
-# endif
-#endif
+# endif
+# endif
-#ifndef PNG_USER_MEM_SUPPORTED
+# ifndef PNG_USER_MEM_SUPPORTED
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of Memory");
-#endif
+# endif
return (ret);
}
if (png_ptr == NULL || ptr == NULL)
return;
-#ifdef PNG_USER_MEM_SUPPORTED
+# ifdef PNG_USER_MEM_SUPPORTED
if (png_ptr->free_fn != NULL)
{
(*(png_ptr->free_fn))(png_ptr, ptr);
return;
}
+
else
png_free_default(png_ptr, ptr);
}
+
void PNGAPI
png_free_default(png_structp png_ptr, png_voidp ptr)
{
if (png_ptr == NULL || ptr == NULL)
return;
-#endif /* PNG_USER_MEM_SUPPORTED */
+# endif /* PNG_USER_MEM_SUPPORTED */
-#if defined(__TURBOC__) && !defined(__FLAT__)
+# if defined(__TURBOC__) && !defined(__FLAT__)
farfree(ptr);
-#else
-# if defined(_MSC_VER) && defined(MAXSEG_64K)
+
+# else
+# if defined(_MSC_VER) && defined(MAXSEG_64K)
hfree(ptr);
-# else
+
+# else
free(ptr);
-# endif
-#endif
-}
+# endif
+# endif
+}
#endif /* Not Borland DOS special memory handler */
/* This function was added at libpng version 1.2.3. The png_malloc_warn()
* instead of issuing a png_error, if it fails to allocate the requested
* memory.
*/
-png_voidp PNGAPI
-png_malloc_warn(png_structp png_ptr, png_alloc_size_t size)
+PNG_FUNCTION(png_voidp,PNGAPI
+png_malloc_warn,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED)
{
png_voidp ptr;
png_uint_32 save_flags;
* pointer before png_write_destroy and png_read_destroy are called.
*/
png_voidp PNGAPI
-png_get_mem_ptr(png_structp png_ptr)
+png_get_mem_ptr(png_const_structp png_ptr)
{
if (png_ptr == NULL)
return (NULL);
+
return ((png_voidp)png_ptr->mem_ptr);
}
#endif /* PNG_USER_MEM_SUPPORTED */
/* pngpread.c - read a png file in push mode
*
- * Last changed in libpng 1.4.3 [June 26, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* and license in png.h
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
#include "pngpriv.h"
+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+
/* Push model modes */
#define PNG_READ_SIG_MODE 0
#define PNG_READ_CHUNK_MODE 1
void PNGAPI
png_process_data(png_structp png_ptr, png_infop info_ptr,
- png_bytep buffer, png_size_t buffer_size)
+ png_bytep buffer, png_size_t buffer_size)
{
if (png_ptr == NULL || info_ptr == NULL)
return;
}
}
+png_size_t PNGAPI
+png_process_data_pause(png_structp png_ptr, int save)
+{
+ if (png_ptr != NULL)
+ {
+ /* It's easiest for the caller if we do the save, then the caller doesn't
+ * have to supply the same data again:
+ */
+ if (save)
+ png_push_save_buffer(png_ptr);
+ else
+ {
+ /* This includes any pending saved bytes: */
+ png_size_t remaining = png_ptr->buffer_size;
+ png_ptr->buffer_size = 0;
+
+ /* So subtract the saved buffer size, unless all the data
+ * is actually 'saved', in which case we just return 0
+ */
+ if (png_ptr->save_buffer_size < remaining)
+ return remaining - png_ptr->save_buffer_size;
+ }
+ }
+
+ return 0;
+}
+
+png_uint_32 PNGAPI
+png_process_data_skip(png_structp png_ptr)
+{
+ png_uint_32 remaining = 0;
+
+ if (png_ptr != NULL && png_ptr->process_mode == PNG_SKIP_MODE &&
+ png_ptr->skip_length > 0)
+ {
+ /* At the end of png_process_data the buffer size must be 0 (see the loop
+ * above) so we can detect a broken call here:
+ */
+ if (png_ptr->buffer_size != 0)
+ png_error(png_ptr,
+ "png_process_data_skip called inside png_process_data");
+
+ /* If is impossible for there to be a saved buffer at this point -
+ * otherwise we could not be in SKIP mode. This will also happen if
+ * png_process_skip is called inside png_process_data (but only very
+ * rarely.)
+ */
+ if (png_ptr->save_buffer_size != 0)
+ png_error(png_ptr, "png_process_data_skip called with saved data");
+
+ remaining = png_ptr->skip_length;
+ png_ptr->skip_length = 0;
+ png_ptr->process_mode = PNG_READ_CHUNK_MODE;
+ }
+
+ return remaining;
+}
+
/* What we do with the incoming data depends on what we were previously
* doing before we ran out of data...
*/
}
png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]),
- num_to_check);
+ num_to_check);
png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes + num_to_check);
if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
if (num_checked < 4 &&
png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
png_error(png_ptr, "Not a PNG file");
+
else
png_error(png_ptr, "PNG file corrupted by ASCII conversion");
}
}
if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
- if (png_ptr->mode & PNG_AFTER_IDAT)
- png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
+ if (png_ptr->mode & PNG_AFTER_IDAT)
+ png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
{
png_error(png_ptr, "Missing IHDR before IDAT");
else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
- !(png_ptr->mode & PNG_HAVE_PLTE))
+ !(png_ptr->mode & PNG_HAVE_PLTE))
png_error(png_ptr, "Missing PLTE before IDAT");
}
}
{
if (png_ptr->skip_length && png_ptr->save_buffer_size)
{
- png_size_t save_size;
+ png_size_t save_size = png_ptr->save_buffer_size;
+ png_uint_32 skip_length = png_ptr->skip_length;
+
+ /* We want the smaller of 'skip_length' and 'save_buffer_size', but
+ * they are of different types and we don't know which variable has the
+ * fewest bits. Carefully select the smaller and cast it to the type of
+ * the larger - this cannot overflow. Do not cast in the following test
+ * - it will break on either 16 or 64 bit platforms.
+ */
+ if (skip_length < save_size)
+ save_size = (png_size_t)skip_length;
- if (png_ptr->skip_length < (png_uint_32)png_ptr->save_buffer_size)
- save_size = (png_size_t)png_ptr->skip_length;
else
- save_size = png_ptr->save_buffer_size;
+ skip_length = (png_uint_32)save_size;
png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size);
- png_ptr->skip_length -= save_size;
+ png_ptr->skip_length -= skip_length;
png_ptr->buffer_size -= save_size;
png_ptr->save_buffer_size -= save_size;
png_ptr->save_buffer_ptr += save_size;
}
if (png_ptr->skip_length && png_ptr->current_buffer_size)
{
- png_size_t save_size;
+ png_size_t save_size = png_ptr->current_buffer_size;
+ png_uint_32 skip_length = png_ptr->skip_length;
+
+ /* We want the smaller of 'skip_length' and 'current_buffer_size', here,
+ * the same problem exists as above and the same solution.
+ */
+ if (skip_length < save_size)
+ save_size = (png_size_t)skip_length;
- if (png_ptr->skip_length < (png_uint_32)png_ptr->current_buffer_size)
- save_size = (png_size_t)png_ptr->skip_length;
else
- save_size = png_ptr->current_buffer_size;
+ skip_length = (png_uint_32)save_size;
png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size);
- png_ptr->skip_length -= save_size;
+ png_ptr->skip_length -= skip_length;
png_ptr->buffer_size -= save_size;
png_ptr->current_buffer_size -= save_size;
png_ptr->current_buffer_ptr += save_size;
}
}
-void PNGAPI
+void PNGCBAPI
png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
{
png_bytep ptr;
if (length < png_ptr->save_buffer_size)
save_size = length;
+
else
save_size = png_ptr->save_buffer_size;
istop = png_ptr->save_buffer_size;
for (i = 0, sp = png_ptr->save_buffer_ptr, dp = png_ptr->save_buffer;
- i < istop; i++, sp++, dp++)
+ i < istop; i++, sp++, dp++)
{
*dp = *sp;
}
}
}
if (png_ptr->save_buffer_size + png_ptr->current_buffer_size >
- png_ptr->save_buffer_max)
+ png_ptr->save_buffer_max)
{
png_size_t new_max;
png_bytep old_buffer;
if (png_ptr->save_buffer_size > PNG_SIZE_MAX -
- (png_ptr->current_buffer_size + 256))
+ (png_ptr->current_buffer_size + 256))
{
- png_error(png_ptr, "Potential overflow of save_buffer");
+ png_error(png_ptr, "Potential overflow of save_buffer");
}
new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256;
old_buffer = png_ptr->save_buffer;
png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr,
- (png_size_t)new_max);
+ (png_size_t)new_max);
+
if (png_ptr->save_buffer == NULL)
{
- png_free(png_ptr, old_buffer);
- png_error(png_ptr, "Insufficient memory for save_buffer");
+ png_free(png_ptr, old_buffer);
+ png_error(png_ptr, "Insufficient memory for save_buffer");
}
+
png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size);
png_free(png_ptr, old_buffer);
png_ptr->save_buffer_max = new_max;
if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
{
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
+
if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
png_error(png_ptr, "Not enough compressed data");
+
return;
}
}
if (png_ptr->idat_size && png_ptr->save_buffer_size)
{
- png_size_t save_size;
-
- if (png_ptr->idat_size < (png_uint_32)png_ptr->save_buffer_size)
- {
- save_size = (png_size_t)png_ptr->idat_size;
+ png_size_t save_size = png_ptr->save_buffer_size;
+ png_uint_32 idat_size = png_ptr->idat_size;
+
+ /* We want the smaller of 'idat_size' and 'current_buffer_size', but they
+ * are of different types and we don't know which variable has the fewest
+ * bits. Carefully select the smaller and cast it to the type of the
+ * larger - this cannot overflow. Do not cast in the following test - it
+ * will break on either 16 or 64 bit platforms.
+ */
+ if (idat_size < save_size)
+ save_size = (png_size_t)idat_size;
- /* Check for overflow */
- if ((png_uint_32)save_size != png_ptr->idat_size)
- png_error(png_ptr, "save_size overflowed in pngpread");
- }
else
- save_size = png_ptr->save_buffer_size;
+ idat_size = (png_uint_32)save_size;
png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size);
png_process_IDAT_data(png_ptr, png_ptr->save_buffer_ptr, save_size);
- png_ptr->idat_size -= save_size;
+ png_ptr->idat_size -= idat_size;
png_ptr->buffer_size -= save_size;
png_ptr->save_buffer_size -= save_size;
png_ptr->save_buffer_ptr += save_size;
}
+
if (png_ptr->idat_size && png_ptr->current_buffer_size)
{
- png_size_t save_size;
+ png_size_t save_size = png_ptr->current_buffer_size;
+ png_uint_32 idat_size = png_ptr->idat_size;
- if (png_ptr->idat_size < (png_uint_32)png_ptr->current_buffer_size)
- {
- save_size = (png_size_t)png_ptr->idat_size;
+ /* We want the smaller of 'idat_size' and 'current_buffer_size', but they
+ * are of different types and we don't know which variable has the fewest
+ * bits. Carefully select the smaller and cast it to the type of the
+ * larger - this cannot overflow.
+ */
+ if (idat_size < save_size)
+ save_size = (png_size_t)idat_size;
- /* Check for overflow */
- if ((png_uint_32)save_size != png_ptr->idat_size)
- png_error(png_ptr, "save_size overflowed in pngpread");
- }
else
- save_size = png_ptr->current_buffer_size;
+ idat_size = (png_uint_32)save_size;
png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size);
png_process_IDAT_data(png_ptr, png_ptr->current_buffer_ptr, save_size);
- png_ptr->idat_size -= save_size;
+ png_ptr->idat_size -= idat_size;
png_ptr->buffer_size -= save_size;
png_ptr->current_buffer_size -= save_size;
png_ptr->current_buffer_ptr += save_size;
* or the stream marked as finished.
*/
while (png_ptr->zstream.avail_in > 0 &&
- !(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
+ !(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
{
int ret;
/* We have data for zlib, but we must check that zlib
- * has somewhere to put the results. It doesn't matter
+ * has someplace to put the results. It doesn't matter
* if we don't expect any results -- it may be the input
* data is just the LZ end code.
*/
png_ptr->zstream.avail_out =
(uInt) PNG_ROWBYTES(png_ptr->pixel_depth,
png_ptr->iwidth) + 1;
+
png_ptr->zstream.next_out = png_ptr->row_buf;
}
/* Using Z_SYNC_FLUSH here means that an unterminated
- * LZ stream can still be handled (a stream with a missing
- * end code), otherwise (Z_NO_FLUSH) a future zlib
- * implementation might defer output and, therefore,
- * change the current behavior. (See comments in inflate.c
- * for why this doesn't happen at present with zlib 1.2.5.)
+ * LZ stream (a stream with a missing end code) can still
+ * be handled, otherwise (Z_NO_FLUSH) a future zlib
+ * implementation might defer output and therefore
+ * change the current behavior (see comments in inflate.c
+ * for why this doesn't happen at present with zlib 1.2.5).
*/
ret = inflate(&png_ptr->zstream, Z_SYNC_FLUSH);
if (png_ptr->row_number >= png_ptr->num_rows ||
png_ptr->pass > 6)
png_warning(png_ptr, "Truncated compressed data in IDAT");
+
else
png_error(png_ptr, "Decompression error in IDAT");
/* Extra data. */
png_warning(png_ptr, "Extra compressed data in IDAT");
png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
+
/* Do no more processing; skip the unprocessed
* input check below.
*/
* after the zlib end code.
*/
if (png_ptr->zstream.avail_in > 0)
- png_warning(png_ptr, "Extra compression data");
+ png_warning(png_ptr, "Extra compression data in IDAT");
}
void /* PRIVATE */
png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
- if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
+ if (png_ptr->transformations)
png_do_read_transformations(png_ptr);
#ifdef PNG_READ_INTERLACING_SUPPORTED
break;
}
+
+ default:
case 6:
{
png_push_have_row(png_ptr, png_ptr->row_buf + 1);
if (png_ptr->interlaced)
{
png_ptr->row_number = 0;
- png_memset(png_ptr->prev_row, 0,
- png_ptr->rowbytes + 1);
+ png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
+
do
{
png_ptr->pass++;
if ((png_ptr->pass == 1 && png_ptr->width < 5) ||
(png_ptr->pass == 3 && png_ptr->width < 3) ||
(png_ptr->pass == 5 && png_ptr->width < 2))
- png_ptr->pass++;
+ png_ptr->pass++;
if (png_ptr->pass > 7)
png_ptr->pass--;
break;
png_ptr->iwidth = (png_ptr->width +
- png_pass_inc[png_ptr->pass] - 1 -
- png_pass_start[png_ptr->pass]) /
- png_pass_inc[png_ptr->pass];
+ png_pass_inc[png_ptr->pass] - 1 -
+ png_pass_start[png_ptr->pass]) /
+ png_pass_inc[png_ptr->pass];
if (png_ptr->transformations & PNG_INTERLACE)
break;
png_ptr->num_rows = (png_ptr->height +
- png_pass_yinc[png_ptr->pass] - 1 -
- png_pass_ystart[png_ptr->pass]) /
- png_pass_yinc[png_ptr->pass];
+ png_pass_yinc[png_ptr->pass] - 1 -
+ png_pass_ystart[png_ptr->pass]) /
+ png_pass_yinc[png_ptr->pass];
} while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0);
}
#ifdef PNG_READ_tEXt_SUPPORTED
void /* PRIVATE */
png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
- length)
+ length)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
{
+ PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
png_error(png_ptr, "Out of place tEXt");
- info_ptr = info_ptr; /* To quiet some compiler warnings */
+ /*NOT REACHED*/
}
#ifdef PNG_MAX_MALLOC_64K
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
+ (png_size_t)(length + 1));
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
if (text < key + png_ptr->current_text_size)
text++;
- text_ptr = (png_textp)png_malloc(png_ptr,
- png_sizeof(png_text));
+ text_ptr = (png_textp)png_malloc(png_ptr, png_sizeof(png_text));
text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
text_ptr->key = key;
-#ifdef PNG_iTXt_SUPPORTED
+ text_ptr->itxt_length = 0;
text_ptr->lang = NULL;
text_ptr->lang_key = NULL;
-#endif
text_ptr->text = text;
ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
png_ptr->current_text = NULL;
if (ret)
- png_warning(png_ptr, "Insufficient memory to store text chunk");
+ png_warning(png_ptr, "Insufficient memory to store text chunk");
}
}
#endif
length)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
- {
- png_error(png_ptr, "Out of place zTXt");
- info_ptr = info_ptr; /* To quiet some compiler warnings */
- }
+ {
+ PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
+ png_error(png_ptr, "Out of place zTXt");
+ /*NOT REACHED*/
+ }
#ifdef PNG_MAX_MALLOC_64K
/* We can't handle zTXt chunks > 64K, since we don't have enough space
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
+ (png_size_t)(length + 1));
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
text++;
- png_ptr->zstream.next_in = (png_bytep )text;
+ png_ptr->zstream.next_in = (png_bytep)text;
png_ptr->zstream.avail_in = (uInt)(png_ptr->current_text_size -
- (text - key));
+ (text - key));
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
png_free(png_ptr, text);
return;
}
+
if (!(png_ptr->zstream.avail_out) || ret == Z_STREAM_END)
{
if (text == NULL)
{
text = (png_charp)png_malloc(png_ptr,
- (png_ptr->zbuf_size
- - png_ptr->zstream.avail_out + key_size + 1));
+ (png_ptr->zbuf_size
+ - png_ptr->zstream.avail_out + key_size + 1));
png_memcpy(text + key_size, png_ptr->zbuf,
- png_ptr->zbuf_size - png_ptr->zstream.avail_out);
+ png_ptr->zbuf_size - png_ptr->zstream.avail_out);
png_memcpy(text, key, key_size);
text_size = key_size + png_ptr->zbuf_size -
- png_ptr->zstream.avail_out;
+ png_ptr->zstream.avail_out;
*(text + text_size) = '\0';
}
+
else
{
png_charp tmp;
tmp = text;
text = (png_charp)png_malloc(png_ptr, text_size +
- (png_ptr->zbuf_size
- - png_ptr->zstream.avail_out + 1));
+ (png_ptr->zbuf_size
+ - png_ptr->zstream.avail_out + 1));
png_memcpy(text, tmp, text_size);
png_free(png_ptr, tmp);
png_memcpy(text + text_size, png_ptr->zbuf,
- png_ptr->zbuf_size - png_ptr->zstream.avail_out);
+ png_ptr->zbuf_size - png_ptr->zstream.avail_out);
text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
*(text + text_size) = '\0';
}
+
if (ret != Z_STREAM_END)
{
png_ptr->zstream.next_out = png_ptr->zbuf;
png_sizeof(png_text));
text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt;
text_ptr->key = key;
-#ifdef PNG_iTXt_SUPPORTED
+ text_ptr->itxt_length = 0;
text_ptr->lang = NULL;
text_ptr->lang_key = NULL;
-#endif
text_ptr->text = text;
ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
png_free(png_ptr, text_ptr);
if (ret)
- png_warning(png_ptr, "Insufficient memory to store text chunk");
+ png_warning(png_ptr, "Insufficient memory to store text chunk");
}
}
#endif
#ifdef PNG_READ_iTXt_SUPPORTED
void /* PRIVATE */
png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
- length)
+ length)
{
if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
- {
- png_error(png_ptr, "Out of place iTXt");
- info_ptr = info_ptr; /* To quiet some compiler warnings */
- }
+ {
+ PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
+ png_error(png_ptr, "Out of place iTXt");
+ /*NOT REACHED*/
+ }
#ifdef PNG_MAX_MALLOC_64K
png_ptr->skip_length = 0; /* This may not be necessary */
#endif
png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
+ (png_size_t)(length + 1));
png_ptr->current_text[length] = '\0';
png_ptr->current_text_ptr = png_ptr->current_text;
png_ptr->current_text_size = (png_size_t)length;
png_ptr->current_text_left -= text_size;
png_ptr->current_text_ptr += text_size;
}
+
if (!(png_ptr->current_text_left))
{
png_textp text_ptr;
if (lang_key < key + png_ptr->current_text_size - 1)
{
- for (; *text; text++)
- /* Empty loop */ ;
+ for (; *text; text++)
+ /* Empty loop */ ;
}
if (text < key + png_ptr->current_text_size)
text++;
text_ptr = (png_textp)png_malloc(png_ptr,
- png_sizeof(png_text));
+ png_sizeof(png_text));
text_ptr->compression = comp_flag + 2;
text_ptr->key = key;
*/
void /* PRIVATE */
png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
- length)
+ length)
{
png_uint_32 skip = 0;
{
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
- PNG_HANDLE_CHUNK_ALWAYS
+ PNG_HANDLE_CHUNK_ALWAYS
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
- && png_ptr->read_user_chunk_fn == NULL
+ && png_ptr->read_user_chunk_fn == NULL
#endif
- )
+ )
#endif
png_chunk_error(png_ptr, "unknown critical chunk");
- info_ptr = info_ptr; /* To quiet some compiler warnings */
+ PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
}
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
#ifdef PNG_MAX_MALLOC_64K
if (length > (png_uint_32)65535L)
{
- png_warning(png_ptr, "unknown chunk too large to fit in memory");
- skip = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
+ png_warning(png_ptr, "unknown chunk too large to fit in memory");
+ skip = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
}
#endif
png_memcpy((png_charp)png_ptr->unknown_chunk.name,
- (png_charp)png_ptr->chunk_name,
- png_sizeof(png_ptr->unknown_chunk.name));
+ (png_charp)png_ptr->chunk_name,
+ png_sizeof(png_ptr->unknown_chunk.name));
png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name) - 1]
- = '\0';
+ = '\0';
png_ptr->unknown_chunk.size = (png_size_t)length;
else
{
png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr,
- (png_size_t)length);
+ (png_size_t)length);
png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
}
/* Callback to user unknown chunk handler */
int ret;
ret = (*(png_ptr->read_user_chunk_fn))
- (png_ptr, &png_ptr->unknown_chunk);
+ (png_ptr, &png_ptr->unknown_chunk);
if (ret < 0)
png_chunk_error(png_ptr, "error in user chunk");
{
if (!(png_ptr->chunk_name[0] & 0x20))
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
- PNG_HANDLE_CHUNK_ALWAYS)
+ PNG_HANDLE_CHUNK_ALWAYS)
png_chunk_error(png_ptr, "unknown critical chunk");
png_set_unknown_chunks(png_ptr, info_ptr,
- &png_ptr->unknown_chunk, 1);
+ &png_ptr->unknown_chunk, 1);
}
}
else
#endif
- png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
+ png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
png_free(png_ptr, png_ptr->unknown_chunk.data);
png_ptr->unknown_chunk.data = NULL;
}
}
void PNGAPI
-png_progressive_combine_row (png_structp png_ptr,
- png_bytep old_row, png_bytep new_row)
+png_progressive_combine_row (png_structp png_ptr, png_bytep old_row,
+ png_const_bytep new_row)
{
PNG_CONST int FARDATA png_pass_dsp_mask[7] =
{0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
void PNGAPI
png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr,
- png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
- png_progressive_end_ptr end_fn)
+ png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
+ png_progressive_end_ptr end_fn)
{
if (png_ptr == NULL)
return;
}
png_voidp PNGAPI
-png_get_progressive_ptr(png_structp png_ptr)
+png_get_progressive_ptr(png_const_structp png_ptr)
{
if (png_ptr == NULL)
return (NULL);
/* pngpriv.h - private declarations for use inside libpng
*
- * libpng version 1.4.4 - September 23, 2010
* For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ *
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
#ifndef PNGPRIV_H
#define PNGPRIV_H
-#ifndef PNG_VERSION_INFO_ONLY
-
+/* This is required for the definition of abort(), used as a last ditch
+ * error handler when all else fails.
+ */
#include <stdlib.h>
+#define PNGLIB_BUILD
+#ifdef PNG_USER_CONFIG
+# include "pngusr.h"
+ /* These should have been defined in pngusr.h */
+# ifndef PNG_USER_PRIVATEBUILD
+# define PNG_USER_PRIVATEBUILD "Custom libpng build"
+# endif
+# ifndef PNG_USER_DLLFNAME_POSTFIX
+# define PNG_USER_DLLFNAME_POSTFIX "Cb"
+# endif
+#endif
+#include "png.h"
+#include "pnginfo.h"
+#include "pngstruct.h"
+
+/* This is used for 16 bit gamma tables - only the top level pointers are const,
+ * this could be changed:
+ */
+typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
+
+/* Added at libpng-1.2.9 */
+/* Moved to pngpriv.h at libpng-1.5.0 */
+
+/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure"
+ * script. We may need it here to get the correct configuration on things
+ * like limits.
+ */
+#ifdef PNG_CONFIGURE_LIBPNG
+# ifdef HAVE_CONFIG_H
+# include "config.h"
+# endif
+#endif
+
+/* Moved to pngpriv.h at libpng-1.5.0 */
+/* NOTE: some of these may have been used in external applications as
+ * these definitions were exposed in pngconf.h prior to 1.5.
+ */
+
+/* If you are running on a machine where you cannot allocate more
+ * than 64K of memory at once, uncomment this. While libpng will not
+ * normally need that much memory in a chunk (unless you load up a very
+ * large file), zlib needs to know how big of a chunk it can use, and
+ * libpng thus makes sure to check any memory allocation to verify it
+ * will fit into memory.
+ *
+ * zlib provides 'MAXSEG_64K' which, if defined, indicates the
+ * same limit and pngconf.h (already included) sets the limit
+ * if certain operating systems are detected.
+ */
+#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
+# define PNG_MAX_MALLOC_64K
+#endif
+
+#ifndef PNG_UNUSED
+/* Unused formal parameter warnings are silenced using the following macro
+ * which is expected to have no bad effects on performance (optimizing
+ * compilers will probably remove it entirely). Note that if you replace
+ * it with something other than whitespace, you must include the terminating
+ * semicolon.
+ */
+# define PNG_UNUSED(param) (void)param;
+#endif
+
+/* Just a little check that someone hasn't tried to define something
+ * contradictory.
+ */
+#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
+# undef PNG_ZBUF_SIZE
+# define PNG_ZBUF_SIZE 65536L
+#endif
+
+/* If warnings or errors are turned off the code is disabled
+ * or redirected here.
+ */
+#ifndef PNG_WARNINGS_SUPPORTED
+# define png_warning(s1,s2) ((void)0)
+# define png_chunk_warning(s1,s2) ((void)0)
+#endif
+#ifndef PNG_ERROR_TEXT_SUPPORTED
+# define png_error(s1,s2) png_err(s1)
+# define png_chunk_error(s1,s2) png_err(s1)
+# define png_fixed_error(s1,s2) png_err(s1)
+#endif
+
#ifndef PNG_EXTERN
/* The functions exported by PNG_EXTERN are internal functions, which
* aren't usually used outside the library (as far as I know), so it is
* debatable if they should be exported at all. In the future, when it
* is possible to have run-time registry of chunk-handling functions,
- * some of these will be made available again.
+ * some of these might be made available again.
# define PNG_EXTERN extern
*/
# define PNG_EXTERN
#endif
+/* Some fixed point APIs are still required even if not exported because
+ * they get used by the corresponding floating point APIs. This magic
+ * deals with this:
+ */
+#ifdef PNG_FIXED_POINT_SUPPORTED
+# define PNGFAPI PNGAPI
+#else
+# define PNGFAPI /* PRIVATE */
+#endif
+
/* Other defines specific to compilers can go here. Try to keep
* them inside an appropriate ifdef/endif pair for portability.
*/
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-# ifdef MACOS
+#if defined(PNG_FLOATING_POINT_SUPPORTED) ||\
+ defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
+ /* png.c requires the following ANSI-C constants if the conversion of
+ * floating point to ASCII is implemented therein:
+ *
+ * DBL_DIG Maximum number of decimal digits (can be set to any constant)
+ * DBL_MIN Smallest normalized fp number (can be set to an arbitrary value)
+ * DBL_MAX Maximum floating point number (can be set to an arbitrary value)
+ */
+# include <float.h>
+
+# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
+ defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
/* We need to check that <math.h> hasn't already been included earlier
* as it seems it doesn't agree with <fp.h>, yet we should really use
* <fp.h> if possible.
# endif
#endif
-/* Codewarrior on NT has linking problems without this. */
-#if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__)
-# define PNG_ALWAYS_EXTERN
-#endif
-
/* This provides the non-ANSI (far) memory allocation routines. */
#if defined(__TURBOC__) && defined(__MSDOS__)
# include <mem.h>
# include <windows.h> /* defines _WINDOWS_ macro */
#endif
+/* Moved here around 1.5.0beta36 from pngconf.h */
+/* Users may want to use these so they are not private. Any library
+ * functions that are passed far data must be model-independent.
+ */
+
+/* Memory model/platform independent fns */
+#ifndef PNG_ABORT
+# ifdef _WINDOWS_
+# define PNG_ABORT() ExitProcess(0)
+# else
+# define PNG_ABORT() abort()
+# endif
+#endif
+
+#ifdef USE_FAR_KEYWORD
+/* Use this to make far-to-near assignments */
+# define CHECK 1
+# define NOCHECK 0
+# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK))
+# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK))
+# define png_strcpy _fstrcpy
+# define png_strncpy _fstrncpy /* Added to v 1.2.6 */
+# define png_strlen _fstrlen
+# define png_memcmp _fmemcmp /* SJT: added */
+# define png_memcpy _fmemcpy
+# define png_memset _fmemset
+# define png_sprintf sprintf
+#else
+# ifdef _WINDOWS_ /* Favor Windows over C runtime fns */
+# define CVT_PTR(ptr) (ptr)
+# define CVT_PTR_NOCHECK(ptr) (ptr)
+# define png_strcpy lstrcpyA
+# define png_strncpy lstrcpynA
+# define png_strlen lstrlenA
+# define png_memcmp memcmp
+# define png_memcpy CopyMemory
+# define png_memset memset
+# define png_sprintf wsprintfA
+# else
+# define CVT_PTR(ptr) (ptr)
+# define CVT_PTR_NOCHECK(ptr) (ptr)
+# define png_strcpy strcpy
+# define png_strncpy strncpy /* Added to v 1.2.6 */
+# define png_strlen strlen
+# define png_memcmp memcmp /* SJT: added */
+# define png_memcpy memcpy
+# define png_memset memset
+# define png_sprintf sprintf
+# endif
+#endif
+/* End of memory model/platform independent support */
+
+#ifndef PNG_NO_SNPRINTF
+# ifdef _MSC_VER
+# define png_snprintf _snprintf /* Added to v 1.2.19 */
+# define png_snprintf2 _snprintf
+# define png_snprintf6 _snprintf
+# else
+# define png_snprintf snprintf /* Added to v 1.2.19 */
+# define png_snprintf2 snprintf
+# define png_snprintf6 snprintf
+# endif
+#else
+ /* You don't have or don't want to use snprintf(). Caution: Using
+ * sprintf instead of snprintf exposes your application to accidental
+ * or malevolent buffer overflows. If you don't have snprintf()
+ * as a general rule you should provide one (you can get one from
+ * Portable OpenSSH).
+ */
+# define png_snprintf(s1,n,fmt,x1) png_sprintf(s1,fmt,x1)
+# define png_snprintf2(s1,n,fmt,x1,x2) png_sprintf(s1,fmt,x1,x2)
+# define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \
+ png_sprintf(s1,fmt,x1,x2,x3,x4,x5,x6)
+#endif
+/* End of 1.5.0beta36 move from pngconf.h */
+
+/* CONSTANTS and UTILITY MACROS
+ * These are used internally by libpng and not exposed in the API
+ */
+
/* Various modes of operation. Note that after an init, mode is set to
* zero automatically when the structure is created.
*/
#define PNG_SHIFT 0x0008
#define PNG_SWAP_BYTES 0x0010
#define PNG_INVERT_MONO 0x0020
-#define PNG_QUANTIZE 0x0040 /* formerly PNG_DITHER */
+#define PNG_QUANTIZE 0x0040
#define PNG_BACKGROUND 0x0080
#define PNG_BACKGROUND_EXPAND 0x0100
- /* 0x0200 unused */
+#define PNG_EXPAND_16 0x0200 /* Added to libpng 1.5.2 */
#define PNG_16_TO_8 0x0400
#define PNG_RGBA 0x0800
#define PNG_EXPAND 0x1000
#define PNG_STRUCT_INFO 0x0002
/* Scaling factor for filter heuristic weighting calculations */
-#define PNG_WEIGHT_SHIFT 8
#define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT))
-#define PNG_COST_SHIFT 3
#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT))
/* Flags for the png_ptr->flags rather than declaring a byte for each one */
#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000L
#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000L
#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000L
-#define PNG_FLAG_ADD_ALPHA 0x200000L /* Added to libpng-1.2.8 */
-#define PNG_FLAG_STRIP_ALPHA 0x400000L /* Added to libpng-1.2.8 */
+ /* 0x200000L unused */
+ /* 0x400000L unused */
#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000L /* Added to libpng-1.4.0 */
/* 0x1000000L unused */
/* 0x2000000L unused */
#define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \
PNG_FLAG_CRC_CRITICAL_MASK)
+/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib
+ * can handle at once. This type need be no larger than 16 bits (so maximum of
+ * 65535), this define allows us to discover how big it is, but limited by the
+ * maximuum for png_size_t. The value can be overriden in a library build
+ * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably
+ * lower value (e.g. 255 works). A lower value may help memory usage (slightly)
+ * and may even improve performance on some systems (and degrade it on others.)
+ */
+#ifndef ZLIB_IO_MAX
+# define ZLIB_IO_MAX ((uInt)-1)
+#endif
+
/* Save typing and make code easier to understand */
#define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \
* integers, "value" a variable. Added to libpng-1.2.6 JB
*/
#define PNG_OUT_OF_RANGE(value, ideal, delta) \
- ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) )
+ ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) )
+
+/* Conversions between fixed and floating point, only defined if
+ * required (to make sure the code doesn't accidentally use float
+ * when it is supposedly disabled.)
+ */
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+/* The floating point conversion can't overflow, though it can and
+ * does lose accuracy relative to the original fixed point value.
+ * In practice this doesn't matter because png_fixed_point only
+ * stores numbers with very low precision. The png_ptr and s
+ * arguments are unused by default but are there in case error
+ * checking becomes a requirement.
+ */
+#define png_float(png_ptr, fixed, s) (.00001 * (fixed))
+
+/* The fixed point conversion performs range checking and evaluates
+ * its argument multiple times, so must be used with care. The
+ * range checking uses the PNG specification values for a signed
+ * 32 bit fixed point value except that the values are deliberately
+ * rounded-to-zero to an integral value - 21474 (21474.83 is roughly
+ * (2^31-1) * 100000). 's' is a string that describes the value being
+ * converted.
+ *
+ * NOTE: this macro will raise a png_error if the range check fails,
+ * therefore it is normally only appropriate to use this on values
+ * that come from API calls or other sources where an out of range
+ * error indicates a programming error, not a data error!
+ *
+ * NOTE: by default this is off - the macro is not used - because the
+ * function call saves a lot of code.
+ */
+#ifdef PNG_FIXED_POINT_MACRO_SUPPORTED
+#define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\
+ ((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0))
+#else
+PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp,
+ png_const_charp text));
+#endif
+#endif
/* Constant strings for known chunk types. If you need to add a chunk,
* define the name here, and add an invocation of the macro wherever it's
*/
/* Allocate memory for an internal libpng struct */
-PNG_EXTERN png_voidp png_create_struct PNGARG((int type));
+PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct,PNGARG((int type)),
+ PNG_ALLOCATED);
/* Free memory from internal libpng struct */
PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr));
-PNG_EXTERN png_voidp png_create_struct_2 PNGARG((int type, png_malloc_ptr
- malloc_fn, png_voidp mem_ptr));
+PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct_2,
+ PNGARG((int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)),
+ PNG_ALLOCATED);
PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr,
- png_free_ptr free_fn, png_voidp mem_ptr));
+ png_free_ptr free_fn, png_voidp mem_ptr));
/* Free any memory that info_ptr points to and reset struct. */
PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr,
- png_infop info_ptr));
+ png_infop info_ptr));
/* Function to allocate memory for zlib. PNGAPI is disallowed. */
-PNG_EXTERN voidpf png_zalloc PNGARG((voidpf png_ptr, uInt items, uInt size));
+PNG_EXTERN PNG_FUNCTION(voidpf,png_zalloc,PNGARG((voidpf png_ptr, uInt items,
+ uInt size)),PNG_ALLOCATED);
/* Function to free memory for zlib. PNGAPI is disallowed. */
PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr));
-/* Next four functions are used internally as callbacks. PNGAPI is required
- * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3. */
+/* Next four functions are used internally as callbacks. PNGCBAPI is required
+ * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3, changed to
+ * PNGCBAPI at 1.5.0
+ */
-PNG_EXTERN void PNGAPI png_default_read_data PNGARG((png_structp png_ptr,
- png_bytep data, png_size_t length));
+PNG_EXTERN void PNGCBAPI png_default_read_data PNGARG((png_structp png_ptr,
+ png_bytep data, png_size_t length));
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-PNG_EXTERN void PNGAPI png_push_fill_buffer PNGARG((png_structp png_ptr,
- png_bytep buffer, png_size_t length));
+PNG_EXTERN void PNGCBAPI png_push_fill_buffer PNGARG((png_structp png_ptr,
+ png_bytep buffer, png_size_t length));
#endif
-PNG_EXTERN void PNGAPI png_default_write_data PNGARG((png_structp png_ptr,
- png_bytep data, png_size_t length));
+PNG_EXTERN void PNGCBAPI png_default_write_data PNGARG((png_structp png_ptr,
+ png_bytep data, png_size_t length));
#ifdef PNG_WRITE_FLUSH_SUPPORTED
-#ifdef PNG_STDIO_SUPPORTED
-PNG_EXTERN void PNGAPI png_default_flush PNGARG((png_structp png_ptr));
-#endif
+# ifdef PNG_STDIO_SUPPORTED
+PNG_EXTERN void PNGCBAPI png_default_flush PNGARG((png_structp png_ptr));
+# endif
#endif
/* Reset the CRC variable */
PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr));
/* Write the "data" buffer to whatever output you are using */
-PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, png_bytep data,
- png_size_t length));
+PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr,
+ png_const_bytep data, png_size_t length));
+
+/* Read and check the PNG file signature */
+PNG_EXTERN void png_read_sig PNGARG((png_structp png_ptr, png_infop info_ptr));
/* Read the chunk header (length + type name) */
PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr));
/* Read data from whatever input you are using into the "data" buffer */
PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data,
- png_size_t length));
+ png_size_t length));
/* Read bytes into buf, and update png_ptr->crc */
PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf,
- png_size_t length));
+ png_size_t length));
/* Decompress data in a chunk that uses compression */
#if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \
defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr,
- int comp_type, png_size_t chunklength, png_size_t prefix_length,
- png_size_t *data_length));
+ int comp_type, png_size_t chunklength, png_size_t prefix_length,
+ png_size_t *data_length));
#endif
/* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */
* passing a maximum of 64K on systems that have this as a memory limit,
* since this is the maximum buffer size we can specify.
*/
-PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr,
- png_size_t length));
+PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr,
+ png_const_bytep ptr, png_size_t length));
#ifdef PNG_WRITE_FLUSH_SUPPORTED
PNG_EXTERN void png_flush PNGARG((png_structp png_ptr));
* information.
*/
PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width,
- png_uint_32 height,
- int bit_depth, int color_type, int compression_method, int filter_method,
- int interlace_method));
+ png_uint_32 height,
+ int bit_depth, int color_type, int compression_method, int filter_method,
+ int interlace_method));
-PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, png_colorp palette,
- png_uint_32 num_pal));
+PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr,
+ png_const_colorp palette, png_uint_32 num_pal));
PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data,
- png_size_t length));
+ png_size_t length));
PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr));
#ifdef PNG_WRITE_gAMA_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
+# ifdef PNG_FLOATING_POINT_SUPPORTED
PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma));
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
+# endif
+# ifdef PNG_FIXED_POINT_SUPPORTED
PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr,
png_fixed_point file_gamma));
-#endif
+# endif
#endif
#ifdef PNG_WRITE_sBIT_SUPPORTED
-PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, png_color_8p sbit,
- int color_type));
+PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr,
+ png_const_color_8p sbit, int color_type));
#endif
#ifdef PNG_WRITE_cHRM_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
+# ifdef PNG_FLOATING_POINT_SUPPORTED
PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr,
- double white_x, double white_y,
- double red_x, double red_y, double green_x, double green_y,
- double blue_x, double blue_y));
-#endif
+ double white_x, double white_y,
+ double red_x, double red_y, double green_x, double green_y,
+ double blue_x, double blue_y));
+# endif
PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr,
- png_fixed_point int_white_x, png_fixed_point int_white_y,
- png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
- int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
- png_fixed_point int_blue_y));
+ png_fixed_point int_white_x, png_fixed_point int_white_y,
+ png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
+ int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
+ png_fixed_point int_blue_y));
#endif
#ifdef PNG_WRITE_sRGB_SUPPORTED
PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr,
- int intent));
+ int intent));
#endif
#ifdef PNG_WRITE_iCCP_SUPPORTED
PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr,
- png_charp name, int compression_type,
- png_charp profile, int proflen));
+ png_const_charp name, int compression_type,
+ png_const_charp profile, int proflen));
/* Note to maintainer: profile should be png_bytep */
#endif
#ifdef PNG_WRITE_sPLT_SUPPORTED
PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr,
- png_sPLT_tp palette));
+ png_const_sPLT_tp palette));
#endif
#ifdef PNG_WRITE_tRNS_SUPPORTED
-PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, png_bytep trans,
- png_color_16p values, int number, int color_type));
+PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr,
+ png_const_bytep trans, png_const_color_16p values, int number,
+ int color_type));
#endif
#ifdef PNG_WRITE_bKGD_SUPPORTED
PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr,
- png_color_16p values, int color_type));
+ png_const_color_16p values, int color_type));
#endif
#ifdef PNG_WRITE_hIST_SUPPORTED
-PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, png_uint_16p hist,
- int num_hist));
+PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr,
+ png_const_uint_16p hist, int num_hist));
#endif
#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr,
- png_charp key, png_charpp new_key));
+ png_const_charp key, png_charpp new_key));
#endif
#ifdef PNG_WRITE_tEXt_SUPPORTED
-PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_charp key,
- png_charp text, png_size_t text_len));
+PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key,
+ png_const_charp text, png_size_t text_len));
#endif
#ifdef PNG_WRITE_zTXt_SUPPORTED
-PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_charp key,
- png_charp text, png_size_t text_len, int compression));
+PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_const_charp key,
+ png_const_charp text, png_size_t text_len, int compression));
#endif
#ifdef PNG_WRITE_iTXt_SUPPORTED
PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr,
- int compression, png_charp key, png_charp lang, png_charp lang_key,
- png_charp text));
+ int compression, png_const_charp key, png_const_charp lang,
+ png_const_charp lang_key, png_const_charp text));
#endif
#ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */
PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_textp text_ptr, int num_text));
+ png_infop info_ptr, png_const_textp text_ptr, int num_text));
#endif
#ifdef PNG_WRITE_oFFs_SUPPORTED
PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr,
- png_int_32 x_offset, png_int_32 y_offset, int unit_type));
+ png_int_32 x_offset, png_int_32 y_offset, int unit_type));
#endif
#ifdef PNG_WRITE_pCAL_SUPPORTED
PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose,
- png_int_32 X0, png_int_32 X1, int type, int nparams,
- png_charp units, png_charpp params));
+ png_int_32 X0, png_int_32 X1, int type, int nparams,
+ png_const_charp units, png_charpp params));
#endif
#ifdef PNG_WRITE_pHYs_SUPPORTED
PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr,
- png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit,
- int unit_type));
+ png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit,
+ int unit_type));
#endif
#ifdef PNG_WRITE_tIME_SUPPORTED
PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr,
- png_timep mod_time));
+ png_const_timep mod_time));
#endif
#ifdef PNG_WRITE_sCAL_SUPPORTED
-#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_STDIO_SUPPORTED)
-PNG_EXTERN void png_write_sCAL PNGARG((png_structp png_ptr,
- int unit, double width, double height));
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr,
- int unit, png_charp width, png_charp height));
-#endif
-#endif
+ int unit, png_const_charp width, png_const_charp height));
#endif
/* Called when finished processing a row of data */
/* Internal use only. Called before first row of data */
PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr));
-#ifdef PNG_READ_GAMMA_SUPPORTED
-PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr,
- png_byte bit_depth));
-#endif
-
/* Combine a row of data, dealing with alpha, etc. if requested */
PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row,
- int mask));
+ int mask));
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Expand an interlaced row */
/* OLD pre-1.0.9 interface:
PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info,
- png_bytep row, int pass, png_uint_32 transformations));
+ png_bytep row, int pass, png_uint_32 transformations));
*/
PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr));
#endif
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* Grab pixels out of a row for an interlaced pass */
PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info,
- png_bytep row, int pass));
+ png_bytep row, int pass));
#endif
/* Unfilter a row */
PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr,
- png_row_infop row_info, png_bytep row, png_bytep prev_row, int filter));
+ png_row_infop row_info, png_bytep row, png_const_bytep prev_row,
+ int filter));
/* Choose the best filter to use and filter the row data */
PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr,
- png_row_infop row_info));
+ png_row_infop row_info));
/* Write out the filtered row. */
PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr,
- png_bytep filtered_row));
+ png_bytep filtered_row));
/* Finish a row while reading, dealing with interlacing passes, etc. */
PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr));
PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr));
/* Optional call to update the users info structure */
PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr,
- png_infop info_ptr));
+ png_infop info_ptr));
/* These are the functions that do the transformations */
#ifdef PNG_READ_FILLER_SUPPORTED
PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info,
- png_bytep row, png_uint_32 filler, png_uint_32 flags));
+ png_bytep row, png_uint_32 filler, png_uint_32 flags));
#endif
#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info,
- png_bytep row));
+ png_bytep row));
#endif
#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info,
- png_bytep row));
+ png_bytep row));
#endif
#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info,
- png_bytep row));
+ png_bytep row));
#endif
#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info,
- png_bytep row));
+ png_bytep row));
#endif
#if defined(PNG_WRITE_FILLER_SUPPORTED) || \
defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
-PNG_EXTERN void png_do_strip_filler PNGARG((png_row_infop row_info,
- png_bytep row, png_uint_32 flags));
+PNG_EXTERN void png_do_strip_channel PNGARG((png_row_infop row_info,
+ png_bytep row, int at_start));
#endif
+#ifdef PNG_16BIT_SUPPORTED
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, png_bytep row));
+PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info,
+ png_bytep row));
+#endif
#endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED) || \
defined(PNG_WRITE_PACKSWAP_SUPPORTED)
-PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, png_bytep row));
+PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info,
+ png_bytep row));
#endif
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
-PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, png_row_infop
- row_info, png_bytep row));
+PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr,
+ png_row_infop row_info, png_bytep row));
#endif
#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info,
- png_bytep row));
+ png_bytep row));
#endif
#ifdef PNG_READ_PACK_SUPPORTED
-PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, png_bytep row));
+PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info,
+ png_bytep row));
#endif
#ifdef PNG_READ_SHIFT_SUPPORTED
-PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, png_bytep row,
- png_color_8p sig_bits));
+PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_color_8p sig_bits));
#endif
#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
-PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, png_bytep row));
+PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info,
+ png_bytep row));
#endif
#ifdef PNG_READ_16_TO_8_SUPPORTED
-PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, png_bytep row));
+PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info,
+ png_bytep row));
#endif
#ifdef PNG_READ_QUANTIZE_SUPPORTED
PNG_EXTERN void png_do_quantize PNGARG((png_row_infop row_info,
- png_bytep row, png_bytep palette_lookup, png_bytep quantize_lookup));
+ png_bytep row, png_const_bytep palette_lookup,
+ png_const_bytep quantize_lookup));
# ifdef PNG_CORRECT_PALETTE_SUPPORTED
PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr,
- png_colorp palette, int num_palette));
+ png_colorp palette, int num_palette));
# endif
#endif
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, png_bytep row));
+PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info,
+ png_bytep row));
#endif
#ifdef PNG_WRITE_PACK_SUPPORTED
#endif
#ifdef PNG_WRITE_SHIFT_SUPPORTED
-PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, png_bytep row,
- png_color_8p bit_depth));
+PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_color_8p bit_depth));
#endif
#ifdef PNG_READ_BACKGROUND_SUPPORTED
-#ifdef PNG_READ_GAMMA_SUPPORTED
-PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row,
- png_color_16p trans_color, png_color_16p background,
- png_color_16p background_1,
- png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1,
- png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1,
- png_uint_16pp gamma_16_to_1, int gamma_shift));
-#else
-PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row,
- png_color_16p trans_color, png_color_16p background));
-#endif
+# ifdef PNG_READ_GAMMA_SUPPORTED
+PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_color_16p trans_color,
+ png_const_color_16p background, png_const_color_16p background_1,
+ png_const_bytep gamma_table, png_const_bytep gamma_from_1,
+ png_const_bytep gamma_to_1, png_const_uint_16pp gamma_16,
+ png_const_uint_16pp gamma_16_from_1, png_const_uint_16pp gamma_16_to_1,
+ int gamma_shift));
+# else
+PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_color_16p trans_color,
+ png_const_color_16p background));
+# endif
#endif
#ifdef PNG_READ_GAMMA_SUPPORTED
-PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, png_bytep row,
- png_bytep gamma_table, png_uint_16pp gamma_16_table,
- int gamma_shift));
+PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info,
+ png_bytep row, png_const_bytep gamma_table,
+ png_const_uint_16pp gamma_16_table, int gamma_shift));
#endif
#ifdef PNG_READ_EXPAND_SUPPORTED
PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info,
- png_bytep row, png_colorp palette, png_bytep trans, int num_trans));
+ png_bytep row, png_const_colorp palette, png_const_bytep trans,
+ int num_trans));
PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info,
- png_bytep row, png_color_16p trans_value));
+ png_bytep row, png_const_color_16p trans_color));
+#endif
+
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+PNG_EXTERN void png_do_expand_16 PNGARG((png_row_infop row_info,
+ png_bytep row));
#endif
/* The following decodes the appropriate chunks, and does error correction,
/* Decode the IHDR chunk */
PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#ifdef PNG_READ_bKGD_SUPPORTED
PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_cHRM_SUPPORTED
PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_gAMA_SUPPORTED
PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_hIST_SUPPORTED
PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_iCCP_SUPPORTED
PNG_EXTERN void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif /* PNG_READ_iCCP_SUPPORTED */
#ifdef PNG_READ_iTXt_SUPPORTED
PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_oFFs_SUPPORTED
PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_pCAL_SUPPORTED
PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_pHYs_SUPPORTED
PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_sBIT_SUPPORTED
PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_sCAL_SUPPORTED
PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_sPLT_SUPPORTED
PNG_EXTERN void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif /* PNG_READ_sPLT_SUPPORTED */
#ifdef PNG_READ_sRGB_SUPPORTED
PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_tEXt_SUPPORTED
PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_tIME_SUPPORTED
PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_tRNS_SUPPORTED
PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
#ifdef PNG_READ_zTXt_SUPPORTED
PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_uint_32 length));
+ png_uint_32 length));
#endif
PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 length));
+ png_infop info_ptr, png_uint_32 length));
PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr,
- png_bytep chunk_name));
+ png_const_bytep chunk_name));
/* Handle the transformations for reading and writing */
PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr));
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr,
- png_infop info_ptr));
+ png_infop info_ptr));
PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr,
- png_infop info_ptr));
+ png_infop info_ptr));
PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr));
PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr,
- png_uint_32 length));
+ png_uint_32 length));
PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr));
PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr));
PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr,
- png_bytep buffer, png_size_t buffer_length));
+ png_bytep buffer, png_size_t buffer_length));
PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr));
PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr,
- png_bytep buffer, png_size_t buffer_length));
+ png_bytep buffer, png_size_t buffer_length));
PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr));
PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 length));
png_infop info_ptr));
PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row));
PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr,
- png_infop info_ptr));
+ png_infop info_ptr));
PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr,
- png_infop info_ptr));
+ png_infop info_ptr));
PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr));
-#ifdef PNG_READ_tEXt_SUPPORTED
+# ifdef PNG_READ_tEXt_SUPPORTED
PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 length));
+ png_infop info_ptr, png_uint_32 length));
PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-#endif
-#ifdef PNG_READ_zTXt_SUPPORTED
+ png_infop info_ptr));
+# endif
+# ifdef PNG_READ_zTXt_SUPPORTED
PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 length));
+ png_infop info_ptr, png_uint_32 length));
PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-#endif
-#ifdef PNG_READ_iTXt_SUPPORTED
+ png_infop info_ptr));
+# endif
+# ifdef PNG_READ_iTXt_SUPPORTED
PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr,
- png_infop info_ptr, png_uint_32 length));
+ png_infop info_ptr, png_uint_32 length));
PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr,
- png_infop info_ptr));
-#endif
+ png_infop info_ptr));
+# endif
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
#ifdef PNG_MNG_FEATURES_SUPPORTED
PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info,
- png_bytep row));
+ png_bytep row));
PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info,
- png_bytep row));
+ png_bytep row));
#endif
/* Added at libpng version 1.4.0 */
-#ifdef PNG_cHRM_SUPPORTED
+#ifdef PNG_CHECK_cHRM_SUPPORTED
PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr,
- png_fixed_point int_white_x, png_fixed_point int_white_y,
- png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
- int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
- png_fixed_point int_blue_y));
+ png_fixed_point int_white_x, png_fixed_point int_white_y,
+ png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
+ int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
+ png_fixed_point int_blue_y));
#endif
-#ifdef PNG_cHRM_SUPPORTED
#ifdef PNG_CHECK_cHRM_SUPPORTED
/* Added at libpng version 1.2.34 and 1.4.0 */
+/* Currently only used by png_check_cHRM_fixed */
PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2,
- unsigned long *hi_product, unsigned long *lo_product));
-#endif
+ unsigned long *hi_product, unsigned long *lo_product));
#endif
/* Added at libpng version 1.4.0 */
PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr,
- png_uint_32 width, png_uint_32 height, int bit_depth,
- int color_type, int interlace_type, int compression_type,
- int filter_type));
+ png_uint_32 width, png_uint_32 height, int bit_depth,
+ int color_type, int interlace_type, int compression_type,
+ int filter_type));
/* Free all memory used by the read (old method - NOT DLL EXPORTED) */
-PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr, png_infop info_ptr,
- png_infop end_info_ptr));
+PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_infop end_info_ptr));
/* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */
PNG_EXTERN void png_write_destroy PNGARG((png_structp png_ptr));
#ifdef USE_FAR_KEYWORD /* memory model conversion function */
-PNG_EXTERN void *png_far_to_near PNGARG((png_structp png_ptr,png_voidp ptr,
- int check));
+PNG_EXTERN void *png_far_to_near PNGARG((png_structp png_ptr, png_voidp ptr,
+ int check));
#endif /* USE_FAR_KEYWORD */
-/* Define PNG_DEBUG at compile time for debugging information. Higher
- * numbers for PNG_DEBUG mean more debugging information. This has
- * only been added since version 0.95 so it is not implemented throughout
- * libpng yet, but more support will be added as needed.
- */
-#ifdef PNG_DEBUG
-#if (PNG_DEBUG > 0)
-#if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
-#include <crtdbg.h>
-#if (PNG_DEBUG > 1)
-#ifndef _DEBUG
-# define _DEBUG
-#endif
-#ifndef png_debug
-#define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
-#endif
-#ifndef png_debug1
-#define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
-#endif
-#ifndef png_debug2
-#define png_debug2(l,m,p1,p2) _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
-#endif
-#endif
-#else /* PNG_DEBUG_FILE || !_MSC_VER */
-#ifndef PNG_DEBUG_FILE
-#define PNG_DEBUG_FILE stderr
-#endif /* PNG_DEBUG_FILE */
-
-#if (PNG_DEBUG > 1)
-/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
- * non-ISO compilers
- */
-# ifdef __STDC__
-# ifndef png_debug
-# define png_debug(l,m) \
- { \
- int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
- }
-# endif
-# ifndef png_debug1
-# define png_debug1(l,m,p1) \
- { \
- int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
- }
-# endif
-# ifndef png_debug2
-# define png_debug2(l,m,p1,p2) \
- { \
- int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
- }
-# endif
-# else /* __STDC __ */
-# ifndef png_debug
-# define png_debug(l,m) \
- { \
- int num_tabs=l; \
- char format[256]; \
- snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
- m,PNG_STRING_NEWLINE); \
- fprintf(PNG_DEBUG_FILE,format); \
- }
-# endif
-# ifndef png_debug1
-# define png_debug1(l,m,p1) \
- { \
- int num_tabs=l; \
- char format[256]; \
- snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
- m,PNG_STRING_NEWLINE); \
- fprintf(PNG_DEBUG_FILE,format,p1); \
- }
-# endif
-# ifndef png_debug2
-# define png_debug2(l,m,p1,p2) \
- { \
- int num_tabs=l; \
- char format[256]; \
- snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
- m,PNG_STRING_NEWLINE); \
- fprintf(PNG_DEBUG_FILE,format,p1,p2); \
- }
-# endif
-# endif /* __STDC __ */
-#endif /* (PNG_DEBUG > 1) */
+#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED)
+PNG_EXTERN PNG_FUNCTION(void, png_fixed_error, (png_structp png_ptr,
+ png_const_charp name),PNG_NORETURN);
+#endif
-#endif /* _MSC_VER */
-#endif /* (PNG_DEBUG > 0) */
-#endif /* PNG_DEBUG */
-#ifndef png_debug
-#define png_debug(l, m)
+/* ASCII to FP interfaces, currently only implemented if sCAL
+ * support is required.
+ */
+#if defined(PNG_READ_sCAL_SUPPORTED)
+/* MAX_DIGITS is actually the maximum number of characters in an sCAL
+ * width or height, derived from the precision (number of significant
+ * digits - a build time settable option) and assumpitions about the
+ * maximum ridiculous exponent.
+ */
+#define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/)
+
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii,
+ png_size_t size, double fp, unsigned int precision));
+#endif /* FLOATING_POINT */
+
+#ifdef PNG_FIXED_POINT_SUPPORTED
+PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr,
+ png_charp ascii, png_size_t size, png_fixed_point fp));
+#endif /* FIXED_POINT */
+#endif /* READ_sCAL */
+
+#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED)
+/* An internal API to validate the format of a floating point number.
+ * The result is the index of the next character. If the number is
+ * not valid it will be the index of a character in the supposed number.
+ *
+ * The format of a number is defined in the PNG extensions specification
+ * and this API is strictly conformant to that spec, not anyone elses!
+ *
+ * The format as a regular expression is:
+ *
+ * [+-]?[0-9]+.?([Ee][+-]?[0-9]+)?
+ *
+ * or:
+ *
+ * [+-]?.[0-9]+(.[0-9]+)?([Ee][+-]?[0-9]+)?
+ *
+ * The complexity is that either integer or fraction must be present and the
+ * fraction is permitted to have no digits only if the integer is present.
+ *
+ * NOTE: The dangling E problem.
+ * There is a PNG valid floating point number in the following:
+ *
+ * PNG floating point numb1.ers are not greedy.
+ *
+ * Working this out requires *TWO* character lookahead (because of the
+ * sign), the parser does not do this - it will fail at the 'r' - this
+ * doesn't matter for PNG sCAL chunk values, but it requires more care
+ * if the value were ever to be embedded in something more complex. Use
+ * ANSI-C strtod if you need the lookahead.
+ */
+/* State table for the parser. */
+#define PNG_FP_INTEGER 0 /* before or in integer */
+#define PNG_FP_FRACTION 1 /* before or in fraction */
+#define PNG_FP_EXPONENT 2 /* before or in exponent */
+#define PNG_FP_STATE 3 /* mask for the above */
+#define PNG_FP_SAW_SIGN 4 /* Saw +/- in current state */
+#define PNG_FP_SAW_DIGIT 8 /* Saw a digit in current state */
+#define PNG_FP_SAW_DOT 16 /* Saw a dot in current state */
+#define PNG_FP_SAW_E 32 /* Saw an E (or e) in current state */
+#define PNG_FP_SAW_ANY 60 /* Saw any of the above 4 */
+#define PNG_FP_WAS_VALID 64 /* Preceding substring is a valid fp number */
+#define PNG_FP_INVALID 128 /* Available for callers as a distinct value */
+
+/* Result codes for the parser (boolean - true meants ok, false means
+ * not ok yet.)
+ */
+#define PNG_FP_MAYBE 0 /* The number may be valid in the future */
+#define PNG_FP_OK 1 /* The number is valid */
+
+/* The actual parser. This can be called repeatedly, it updates
+ * the index into the string and the state variable (which must
+ * be initialzed to 0). It returns a result code, as above. There
+ * is no point calling the parser any more if it fails to advance to
+ * the end of the string - it is stuck on an invalid character (or
+ * terminated by '\0').
+ *
+ * Note that the pointer will consume an E or even an E+ then leave
+ * a 'maybe' state even though a preceding integer.fraction is valid.
+ * The PNG_FP_WAS_VALID flag indicates that a preceding substring was
+ * a valid number. It's possible to recover from this by calling
+ * the parser again (from the start, with state 0) but with a string
+ * that omits the last character (i.e. set the size to the index of
+ * the problem character.) This has not been tested within libpng.
+ */
+PNG_EXTERN int png_check_fp_number PNGARG((png_const_charp string,
+ png_size_t size, int *statep, png_size_tp whereami));
+
+/* This is the same but it checks a complete string and returns true
+ * only if it just contains a floating point number.
+ */
+PNG_EXTERN int png_check_fp_string PNGARG((png_const_charp string,
+ png_size_t size));
+#endif /* pCAL || sCAL */
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) ||\
+ defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED)
+/* Added at libpng version 1.5.0 */
+/* This is a utility to provide a*times/div (rounded) and indicate
+ * if there is an overflow. The result is a boolean - false (0)
+ * for overflow, true (1) if no overflow, in which case *res
+ * holds the result.
+ */
+PNG_EXTERN int png_muldiv PNGARG((png_fixed_point_p res, png_fixed_point a,
+ png_int_32 multiplied_by, png_int_32 divided_by));
+#endif
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED)
+/* Same deal, but issue a warning on overflow and return 0. */
+PNG_EXTERN png_fixed_point png_muldiv_warn PNGARG((png_structp png_ptr,
+ png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by));
#endif
-#ifndef png_debug1
-#define png_debug1(l, m, p1)
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+/* Calculate a reciprocal - used for gamma values. This returns
+ * 0 if the argument is 0 in order to maintain an undefined value,
+ * there are no warnings.
+ */
+PNG_EXTERN png_fixed_point png_reciprocal PNGARG((png_fixed_point a));
+
+/* The same but gives a reciprocal of the product of two fixed point
+ * values. Accuracy is suitable for gamma calculations but this is
+ * not exact - use png_muldiv for that.
+ */
+PNG_EXTERN png_fixed_point png_reciprocal2 PNGARG((png_fixed_point a,
+ png_fixed_point b));
#endif
-#ifndef png_debug2
-#define png_debug2(l, m, p1, p2)
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+/* Internal fixed point gamma correction. These APIs are called as
+ * required to convert single values - they don't need to be fast,
+ * they are not used when processing image pixel values.
+ *
+ * While the input is an 'unsigned' value it must actually be the
+ * correct bit value - 0..255 or 0..65535 as required.
+ */
+PNG_EXTERN png_uint_16 png_gamma_correct PNGARG((png_structp png_ptr,
+ unsigned int value, png_fixed_point gamma_value));
+PNG_EXTERN int png_gamma_significant PNGARG((png_fixed_point gamma_value));
+PNG_EXTERN png_uint_16 png_gamma_16bit_correct PNGARG((unsigned int value,
+ png_fixed_point gamma_value));
+PNG_EXTERN png_byte png_gamma_8bit_correct PNGARG((unsigned int value,
+ png_fixed_point gamma_value));
+PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr,
+ int bit_depth));
#endif
/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
+
+#include "pngdebug.h"
+
#ifdef __cplusplus
}
#endif
-#endif /* PNG_VERSION_INFO_ONLY */
#endif /* PNGPRIV_H */
/* pngread.c - read a PNG file
*
- * Last changed in libpng 1.4.1 [February 25, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* read a PNG file or stream.
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#ifdef PNG_READ_SUPPORTED
#include "pngpriv.h"
+#ifdef PNG_READ_SUPPORTED
/* Create a PNG structure for reading, and allocate any memory needed. */
-png_structp PNGAPI
-png_create_read_struct(png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn)
+PNG_FUNCTION(png_structp,PNGAPI
+png_create_read_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED)
{
#ifdef PNG_USER_MEM_SUPPORTED
return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn,
- warn_fn, NULL, NULL, NULL));
+ warn_fn, NULL, NULL, NULL));
}
/* Alternate create PNG structure for reading, and allocate any memory
* needed.
*/
-png_structp PNGAPI
-png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
- png_malloc_ptr malloc_fn, png_free_ptr free_fn)
+PNG_FUNCTION(png_structp,PNGAPI
+png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
+ png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED)
{
#endif /* PNG_USER_MEM_SUPPORTED */
#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
- jmp_buf jmpbuf;
+ jmp_buf png_jmpbuf;
#endif
#endif
#ifdef PNG_USER_MEM_SUPPORTED
png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
- malloc_fn, mem_ptr);
+ malloc_fn, mem_ptr);
#else
png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
#endif
#ifdef PNG_USER_LIMITS_SUPPORTED
png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
+
# ifdef PNG_USER_CHUNK_CACHE_MAX
/* Added at libpng-1.2.43 and 1.4.0 */
png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX;
# endif
+
# ifdef PNG_SET_USER_CHUNK_MALLOC_MAX
/* Added at libpng-1.2.43 and 1.4.1 */
png_ptr->user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX;
encounter a png_error() will longjmp here. Since the jmpbuf is
then meaningless we abort instead of returning. */
#ifdef USE_FAR_KEYWORD
- if (setjmp(jmpbuf))
+ if (setjmp(png_jmpbuf))
#else
if (setjmp(png_jmpbuf(png_ptr))) /* Sets longjmp to match setjmp */
#endif
PNG_ABORT();
#ifdef USE_FAR_KEYWORD
- png_memcpy(png_jmpbuf(png_ptr), jmpbuf, png_sizeof(jmp_buf));
+ png_memcpy(png_jmpbuf(png_ptr), png_jmpbuf, png_sizeof(jmp_buf));
#endif
#endif /* PNG_SETJMP_SUPPORTED */
if (user_png_ver)
{
i = 0;
+
do
{
if (user_png_ver[i] != png_libpng_ver[i])
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
} while (png_libpng_ver[i++]);
- }
- else
- png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
+ }
+ else
+ png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
- if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
- {
- /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
- * we must recompile any applications that use any older library version.
- * For versions after libpng 1.0, we will be compatible, so we need
- * only check the first digit.
- */
+
+ if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
+ {
+ /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
+ * we must recompile any applications that use any older library version.
+ * For versions after libpng 1.0, we will be compatible, so we need
+ * only check the first digit.
+ */
if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
(user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
(user_png_ver[0] == '0' && user_png_ver[2] < '9'))
{
-#ifdef PNG_STDIO_SUPPORTED
+#ifdef PNG_CONSOLE_IO_SUPPORTED
char msg[80];
if (user_png_ver)
{
- png_snprintf(msg, 80,
- "Application was compiled with png.h from libpng-%.20s",
- user_png_ver);
- png_warning(png_ptr, msg);
+ png_snprintf2(msg, 80,
+ "Application built with libpng-%.20s"
+ " but running with %.20s",
+ user_png_ver,
+ png_libpng_ver);
+ png_warning(png_ptr, msg);
}
- png_snprintf(msg, 80,
- "Application is running with png.c from libpng-%.20s",
- png_libpng_ver);
- png_warning(png_ptr, msg);
+#else
+ png_warning(png_ptr,
+ "Incompatible libpng version in application and library");
#endif
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
png_ptr->flags = 0;
#endif
- png_warning(png_ptr,
- "Incompatible libpng version in application and library");
png_cleanup_needed = 1;
}
{
/* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
- png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr,
- png_ptr->zbuf_size);
+ png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, png_ptr->zbuf_size);
+
if (png_ptr->zbuf == NULL)
- png_cleanup_needed = 1;
+ png_cleanup_needed = 1;
}
+
png_ptr->zstream.zalloc = png_zalloc;
png_ptr->zstream.zfree = png_zfree;
png_ptr->zstream.opaque = (voidpf)png_ptr;
{
switch (inflateInit(&png_ptr->zstream))
{
- case Z_OK: /* Do nothing */ break;
+ case Z_OK:
+ break; /* Do nothing */
+
case Z_MEM_ERROR:
- case Z_STREAM_ERROR: png_warning(png_ptr, "zlib memory error");
- png_cleanup_needed = 1; break;
- case Z_VERSION_ERROR: png_warning(png_ptr, "zlib version error");
- png_cleanup_needed = 1; break;
+ png_warning(png_ptr, "zlib memory error");
+ png_cleanup_needed = 1;
+ break;
+
+ case Z_STREAM_ERROR:
+ png_warning(png_ptr, "zlib stream error");
+ png_cleanup_needed = 1;
+ break;
+
+ case Z_VERSION_ERROR:
+ png_warning(png_ptr, "zlib version error");
+ png_cleanup_needed = 1;
+ break;
+
default: png_warning(png_ptr, "Unknown zlib error");
png_cleanup_needed = 1;
}
png_ptr->zbuf = NULL;
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)png_ptr,
- (png_free_ptr)free_fn, (png_voidp)mem_ptr);
+ (png_free_ptr)free_fn, (png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)png_ptr);
#endif
png_read_info(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_read_info");
-
+
if (png_ptr == NULL || info_ptr == NULL)
return;
-
- /* If we haven't checked all of the PNG signature bytes, do so now. */
- if (png_ptr->sig_bytes < 8)
- {
- png_size_t num_checked = png_ptr->sig_bytes,
- num_to_check = 8 - num_checked;
-#ifdef PNG_IO_STATE_SUPPORTED
- png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE;
-#endif
-
- png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check);
- png_ptr->sig_bytes = 8;
-
- if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
- {
- if (num_checked < 4 &&
- png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
- png_error(png_ptr, "Not a PNG file");
- else
- png_error(png_ptr, "PNG file corrupted by ASCII conversion");
- }
- if (num_checked < 3)
- png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
- }
+ /* Read and check the PNG file signature. */
+ png_read_sig(png_ptr, info_ptr);
for (;;)
{
* matching the chunk name rather than a linear search.
*/
if (!png_memcmp(chunk_name, png_IDAT, 4))
- if (png_ptr->mode & PNG_AFTER_IDAT)
- png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
+ if (png_ptr->mode & PNG_AFTER_IDAT)
+ png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
if (!png_memcmp(chunk_name, png_IHDR, 4))
png_handle_IHDR(png_ptr, info_ptr, length);
+
else if (!png_memcmp(chunk_name, png_IEND, 4))
png_handle_IEND(png_ptr, info_ptr, length);
+
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
else if (png_handle_as_unknown(png_ptr, chunk_name))
{
if (!png_memcmp(chunk_name, png_IDAT, 4))
png_ptr->mode |= PNG_HAVE_IDAT;
+
png_handle_unknown(png_ptr, info_ptr, length);
+
if (!png_memcmp(chunk_name, png_PLTE, 4))
png_ptr->mode |= PNG_HAVE_PLTE;
+
else if (!png_memcmp(chunk_name, png_IDAT, 4))
{
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before IDAT");
+
else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
- !(png_ptr->mode & PNG_HAVE_PLTE))
+ !(png_ptr->mode & PNG_HAVE_PLTE))
png_error(png_ptr, "Missing PLTE before IDAT");
+
break;
}
}
#endif
else if (!png_memcmp(chunk_name, png_PLTE, 4))
png_handle_PLTE(png_ptr, info_ptr, length);
+
else if (!png_memcmp(chunk_name, png_IDAT, 4))
{
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before IDAT");
+
else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
- !(png_ptr->mode & PNG_HAVE_PLTE))
+ !(png_ptr->mode & PNG_HAVE_PLTE))
png_error(png_ptr, "Missing PLTE before IDAT");
png_ptr->idat_size = length;
png_ptr->mode |= PNG_HAVE_IDAT;
break;
}
+
#ifdef PNG_READ_bKGD_SUPPORTED
else if (!png_memcmp(chunk_name, png_bKGD, 4))
png_handle_bKGD(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_cHRM_SUPPORTED
else if (!png_memcmp(chunk_name, png_cHRM, 4))
png_handle_cHRM(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_gAMA_SUPPORTED
else if (!png_memcmp(chunk_name, png_gAMA, 4))
png_handle_gAMA(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_hIST_SUPPORTED
else if (!png_memcmp(chunk_name, png_hIST, 4))
png_handle_hIST(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_oFFs_SUPPORTED
else if (!png_memcmp(chunk_name, png_oFFs, 4))
png_handle_oFFs(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_pCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_pCAL, 4))
png_handle_pCAL(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_sCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_sCAL, 4))
png_handle_sCAL(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_pHYs_SUPPORTED
else if (!png_memcmp(chunk_name, png_pHYs, 4))
png_handle_pHYs(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_sBIT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sBIT, 4))
png_handle_sBIT(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_sRGB_SUPPORTED
else if (!png_memcmp(chunk_name, png_sRGB, 4))
png_handle_sRGB(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_iCCP_SUPPORTED
else if (!png_memcmp(chunk_name, png_iCCP, 4))
png_handle_iCCP(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_sPLT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sPLT, 4))
png_handle_sPLT(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_tEXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_tEXt, 4))
png_handle_tEXt(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_tIME_SUPPORTED
else if (!png_memcmp(chunk_name, png_tIME, 4))
png_handle_tIME(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_tRNS_SUPPORTED
else if (!png_memcmp(chunk_name, png_tRNS, 4))
png_handle_tRNS(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_zTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_zTXt, 4))
png_handle_zTXt(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_iTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_iTXt, 4))
png_handle_iTXt(png_ptr, info_ptr, length);
#endif
+
else
png_handle_unknown(png_ptr, info_ptr, length);
}
png_read_update_info(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_read_update_info");
-
+
if (png_ptr == NULL)
return;
+
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
+
else
png_warning(png_ptr,
- "Ignoring extra png_read_update_info() call; row buffer not reallocated");
+ "Ignoring extra png_read_update_info() call;"
+ " row buffer not reallocated");
png_read_transform_info(png_ptr, info_ptr);
}
png_start_read_image(png_structp png_ptr)
{
png_debug(1, "in png_start_read_image");
-
+
if (png_ptr == NULL)
return;
+
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
+ else
+ png_warning(png_ptr,
+ "Ignoring extra png_start_read_image() call;"
+ " row buffer not reallocated");
}
#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
{
PNG_IDAT;
+#ifdef PNG_READ_INTERLACING_SUPPORTED
PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55,
- 0xff};
+ 0xff};
PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
+#endif
int ret;
-
+
if (png_ptr == NULL)
return;
-
+
png_debug2(1, "in png_read_row (row %lu, pass %d)",
- (unsigned long) png_ptr->row_number, png_ptr->pass);
+ (unsigned long)png_ptr->row_number, png_ptr->pass);
if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
png_read_start_row(png_ptr);
+
if (png_ptr->row_number == 0 && png_ptr->pass == 0)
{
/* Check for transforms that have been set but were defined out */
if (png_ptr->transformations & PNG_INVERT_MONO)
png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined");
#endif
+
#if defined(PNG_WRITE_FILLER_SUPPORTED) && !defined(PNG_READ_FILLER_SUPPORTED)
if (png_ptr->transformations & PNG_FILLER)
png_warning(png_ptr, "PNG_READ_FILLER_SUPPORTED is not defined");
#endif
+
#if defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \
!defined(PNG_READ_PACKSWAP_SUPPORTED)
if (png_ptr->transformations & PNG_PACKSWAP)
png_warning(png_ptr, "PNG_READ_PACKSWAP_SUPPORTED is not defined");
#endif
+
#if defined(PNG_WRITE_PACK_SUPPORTED) && !defined(PNG_READ_PACK_SUPPORTED)
if (png_ptr->transformations & PNG_PACK)
png_warning(png_ptr, "PNG_READ_PACK_SUPPORTED is not defined");
#endif
+
#if defined(PNG_WRITE_SHIFT_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED)
if (png_ptr->transformations & PNG_SHIFT)
png_warning(png_ptr, "PNG_READ_SHIFT_SUPPORTED is not defined");
#endif
+
#if defined(PNG_WRITE_BGR_SUPPORTED) && !defined(PNG_READ_BGR_SUPPORTED)
if (png_ptr->transformations & PNG_BGR)
png_warning(png_ptr, "PNG_READ_BGR_SUPPORTED is not defined");
#endif
+
#if defined(PNG_WRITE_SWAP_SUPPORTED) && !defined(PNG_READ_SWAP_SUPPORTED)
if (png_ptr->transformations & PNG_SWAP_BYTES)
png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined");
return;
}
break;
+
case 1:
if ((png_ptr->row_number & 0x07) || png_ptr->width < 5)
{
if (dsp_row != NULL)
png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_pass_dsp_mask[png_ptr->pass]);
+
png_read_finish_row(png_ptr);
return;
}
break;
+
case 2:
if ((png_ptr->row_number & 0x07) != 4)
{
if (dsp_row != NULL && (png_ptr->row_number & 4))
png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_pass_dsp_mask[png_ptr->pass]);
+
png_read_finish_row(png_ptr);
return;
}
break;
+
case 3:
if ((png_ptr->row_number & 3) || png_ptr->width < 3)
{
if (dsp_row != NULL)
png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_pass_dsp_mask[png_ptr->pass]);
+
png_read_finish_row(png_ptr);
return;
}
break;
+
case 4:
if ((png_ptr->row_number & 3) != 2)
{
if (dsp_row != NULL && (png_ptr->row_number & 2))
png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_pass_dsp_mask[png_ptr->pass]);
+
png_read_finish_row(png_ptr);
return;
}
{
if (dsp_row != NULL)
png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_pass_dsp_mask[png_ptr->pass]);
+
png_read_finish_row(png_ptr);
return;
}
break;
+
+ default:
case 6:
if (!(png_ptr->row_number & 1))
{
png_ptr->zstream.avail_out =
(uInt)(PNG_ROWBYTES(png_ptr->pixel_depth,
png_ptr->iwidth) + 1);
+
do
{
if (!(png_ptr->zstream.avail_in))
if (png_ptr->zbuf_size > png_ptr->idat_size)
png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size;
png_crc_read(png_ptr, png_ptr->zbuf,
- (png_size_t)png_ptr->zstream.avail_in);
+ (png_size_t)png_ptr->zstream.avail_in);
png_ptr->idat_size -= png_ptr->zstream.avail_in;
}
+
ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
+
if (ret == Z_STREAM_END)
{
if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in ||
png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
break;
}
+
if (ret != Z_OK)
png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg :
- "Decompression error");
+ "Decompression error");
} while (png_ptr->zstream.avail_out);
if (png_ptr->row_buf[0])
png_read_filter_row(png_ptr, &(png_ptr->row_info),
- png_ptr->row_buf + 1, png_ptr->prev_row + 1,
- (int)(png_ptr->row_buf[0]));
+ png_ptr->row_buf + 1, png_ptr->prev_row + 1,
+ (int)(png_ptr->row_buf[0]));
png_memcpy(png_ptr->prev_row, png_ptr->row_buf, png_ptr->rowbytes + 1);
#ifdef PNG_MNG_FEATURES_SUPPORTED
if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
- (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
+ (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
{
/* Intrapixel differencing */
png_do_read_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
- if (png_ptr->transformations || (png_ptr->flags&PNG_FLAG_STRIP_ALPHA))
+ if (png_ptr->transformations)
png_do_read_transformations(png_ptr);
#ifdef PNG_READ_INTERLACING_SUPPORTED
png_do_read_interlace(png_ptr);
if (dsp_row != NULL)
- png_combine_row(png_ptr, dsp_row,
- png_pass_dsp_mask[png_ptr->pass]);
+ png_combine_row(png_ptr, dsp_row, png_pass_dsp_mask[png_ptr->pass]);
+
if (row != NULL)
- png_combine_row(png_ptr, row,
- png_pass_mask[png_ptr->pass]);
+ png_combine_row(png_ptr, row, png_pass_mask[png_ptr->pass]);
}
+
else
#endif
{
if (row != NULL)
png_combine_row(png_ptr, row, 0xff);
+
if (dsp_row != NULL)
png_combine_row(png_ptr, dsp_row, 0xff);
}
void PNGAPI
png_read_rows(png_structp png_ptr, png_bytepp row,
- png_bytepp display_row, png_uint_32 num_rows)
+ png_bytepp display_row, png_uint_32 num_rows)
{
png_uint_32 i;
png_bytepp rp;
png_bytepp dp;
png_debug(1, "in png_read_rows");
-
+
if (png_ptr == NULL)
return;
+
rp = row;
dp = display_row;
if (rp != NULL && dp != NULL)
png_read_row(png_ptr, rptr, dptr);
}
+
else if (rp != NULL)
for (i = 0; i < num_rows; i++)
{
png_read_row(png_ptr, rptr, NULL);
rp++;
}
+
else if (dp != NULL)
for (i = 0; i < num_rows; i++)
{
png_bytepp rp;
png_debug(1, "in png_read_image");
-
+
if (png_ptr == NULL)
return;
#ifdef PNG_READ_INTERLACING_SUPPORTED
- pass = png_set_interlace_handling(png_ptr);
+ if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
+ {
+ pass = png_set_interlace_handling(png_ptr);
+ /* And make sure transforms are initialized. */
+ png_start_read_image(png_ptr);
+ }
+ else
+ {
+ if (png_ptr->interlaced && !(png_ptr->transformations & PNG_INTERLACE))
+ {
+ /* Caller called png_start_read_image or png_read_update_info without
+ * first turning on the PNG_INTERLACE transform. We can fix this here,
+ * but the caller should do it!
+ */
+ png_warning(png_ptr, "Interlace handling should be turned on when "
+ "using png_read_image");
+ /* Make sure this is set correctly */
+ png_ptr->num_rows = png_ptr->height;
+ }
+
+ /* Obtain the pass number, which also turns on the PNG_INTERLACE flag in
+ * the above error case.
+ */
+ pass = png_set_interlace_handling(png_ptr);
+ }
#else
if (png_ptr->interlaced)
png_error(png_ptr,
- "Cannot read interlaced image -- interlace handler disabled");
+ "Cannot read interlaced image -- interlace handler disabled");
+
pass = 1;
#endif
-
image_height=png_ptr->height;
- png_ptr->num_rows = image_height; /* Make sure this is set correctly */
for (j = 0; j < pass; j++)
{
png_read_end(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_read_end");
-
+
if (png_ptr == NULL)
return;
+
png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
do
if (!png_memcmp(chunk_name, png_IHDR, 4))
png_handle_IHDR(png_ptr, info_ptr, length);
+
else if (!png_memcmp(chunk_name, png_IEND, 4))
png_handle_IEND(png_ptr, info_ptr, length);
+
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
else if (png_handle_as_unknown(png_ptr, chunk_name))
{
png_ptr->mode |= PNG_HAVE_PLTE;
}
#endif
+
else if (!png_memcmp(chunk_name, png_IDAT, 4))
{
/* Zero length IDATs are legal after the last IDAT has been
*/
if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT))
png_benign_error(png_ptr, "Too many IDATs found");
+
png_crc_finish(png_ptr, length);
}
else if (!png_memcmp(chunk_name, png_PLTE, 4))
png_handle_PLTE(png_ptr, info_ptr, length);
+
#ifdef PNG_READ_bKGD_SUPPORTED
else if (!png_memcmp(chunk_name, png_bKGD, 4))
png_handle_bKGD(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_cHRM_SUPPORTED
else if (!png_memcmp(chunk_name, png_cHRM, 4))
png_handle_cHRM(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_gAMA_SUPPORTED
else if (!png_memcmp(chunk_name, png_gAMA, 4))
png_handle_gAMA(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_hIST_SUPPORTED
else if (!png_memcmp(chunk_name, png_hIST, 4))
png_handle_hIST(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_oFFs_SUPPORTED
else if (!png_memcmp(chunk_name, png_oFFs, 4))
png_handle_oFFs(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_pCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_pCAL, 4))
png_handle_pCAL(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_sCAL_SUPPORTED
else if (!png_memcmp(chunk_name, png_sCAL, 4))
png_handle_sCAL(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_pHYs_SUPPORTED
else if (!png_memcmp(chunk_name, png_pHYs, 4))
png_handle_pHYs(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_sBIT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sBIT, 4))
png_handle_sBIT(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_sRGB_SUPPORTED
else if (!png_memcmp(chunk_name, png_sRGB, 4))
png_handle_sRGB(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_iCCP_SUPPORTED
else if (!png_memcmp(chunk_name, png_iCCP, 4))
png_handle_iCCP(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_sPLT_SUPPORTED
else if (!png_memcmp(chunk_name, png_sPLT, 4))
png_handle_sPLT(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_tEXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_tEXt, 4))
png_handle_tEXt(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_tIME_SUPPORTED
else if (!png_memcmp(chunk_name, png_tIME, 4))
png_handle_tIME(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_tRNS_SUPPORTED
else if (!png_memcmp(chunk_name, png_tRNS, 4))
png_handle_tRNS(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_zTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_zTXt, 4))
png_handle_zTXt(png_ptr, info_ptr, length);
#endif
+
#ifdef PNG_READ_iTXt_SUPPORTED
else if (!png_memcmp(chunk_name, png_iTXt, 4))
png_handle_iTXt(png_ptr, info_ptr, length);
#endif
+
else
png_handle_unknown(png_ptr, info_ptr, length);
} while (!(png_ptr->mode & PNG_HAVE_IEND));
/* Free all memory used by the read */
void PNGAPI
png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
- png_infopp end_info_ptr_ptr)
+ png_infopp end_info_ptr_ptr)
{
png_structp png_ptr = NULL;
png_infop info_ptr = NULL, end_info_ptr = NULL;
#endif
png_debug(1, "in png_destroy_read_struct");
-
+
if (png_ptr_ptr != NULL)
png_ptr = *png_ptr_ptr;
if (png_ptr == NULL)
#endif
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn,
- (png_voidp)mem_ptr);
+ (png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)end_info_ptr);
#endif
#endif
png_debug(1, "in png_read_destroy");
-
+
if (info_ptr != NULL)
png_info_destroy(png_ptr, info_ptr);
png_free(png_ptr, png_ptr->big_row_buf);
png_free(png_ptr, png_ptr->prev_row);
png_free(png_ptr, png_ptr->chunkdata);
+
#ifdef PNG_READ_QUANTIZE_SUPPORTED
png_free(png_ptr, png_ptr->palette_lookup);
png_free(png_ptr, png_ptr->quantize_index);
#endif
+
#ifdef PNG_READ_GAMMA_SUPPORTED
png_free(png_ptr, png_ptr->gamma_table);
#endif
+
#ifdef PNG_READ_BACKGROUND_SUPPORTED
png_free(png_ptr, png_ptr->gamma_from_1);
png_free(png_ptr, png_ptr->gamma_to_1);
#endif
+
if (png_ptr->free_me & PNG_FREE_PLTE)
png_zfree(png_ptr, png_ptr->palette);
png_ptr->free_me &= ~PNG_FREE_PLTE;
+
#if defined(PNG_tRNS_SUPPORTED) || \
defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
if (png_ptr->free_me & PNG_FREE_TRNS)
png_free(png_ptr, png_ptr->trans_alpha);
png_ptr->free_me &= ~PNG_FREE_TRNS;
#endif
+
#ifdef PNG_READ_hIST_SUPPORTED
if (png_ptr->free_me & PNG_FREE_HIST)
png_free(png_ptr, png_ptr->hist);
png_ptr->free_me &= ~PNG_FREE_HIST;
#endif
+
#ifdef PNG_READ_GAMMA_SUPPORTED
if (png_ptr->gamma_16_table != NULL)
{
}
png_free(png_ptr, png_ptr->gamma_16_table);
}
+
#ifdef PNG_READ_BACKGROUND_SUPPORTED
if (png_ptr->gamma_16_from_1 != NULL)
{
}
#endif
#endif
+
#ifdef PNG_TIME_RFC1123_SUPPORTED
png_free(png_ptr, png_ptr->time_buffer);
#endif
inflateEnd(&png_ptr->zstream);
+
#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
png_free(png_ptr, png_ptr->save_buffer);
#endif
* being used again.
*/
#ifdef PNG_SETJMP_SUPPORTED
- png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
+ png_memcpy(tmp_jmp, png_ptr->png_jmpbuf, png_sizeof(jmp_buf));
#endif
error_fn = png_ptr->error_fn;
#endif
#ifdef PNG_SETJMP_SUPPORTED
- png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
+ png_memcpy(png_ptr->png_jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
#endif
}
{
if (png_ptr == NULL)
return;
+
png_ptr->read_row_fn = read_row_fn;
}
{
int row;
- if (png_ptr == NULL)
+ if (png_ptr == NULL || info_ptr == NULL)
return;
/* png_read_info() gives us all of the information from the
#endif
#ifdef PNG_READ_BGR_SUPPORTED
- /* Flip the RGB pixels to BGR (or RGBA to BGRA)
- */
+ /* Flip the RGB pixels to BGR (or RGBA to BGRA) */
if (transforms & PNG_TRANSFORM_BGR)
png_set_bgr(png_ptr);
#endif
#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
- /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR)
- */
+ /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) */
if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
- png_set_swap_alpha(png_ptr);
+ png_set_swap_alpha(png_ptr);
#endif
#ifdef PNG_READ_SWAP_SUPPORTED
- /* Swap bytes of 16 bit files to least significant byte first
- */
+ /* Swap bytes of 16 bit files to least significant byte first */
if (transforms & PNG_TRANSFORM_SWAP_ENDIAN)
png_set_swap(png_ptr);
#endif
/* Added at libpng-1.2.41 */
#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
- /* Invert the alpha channel from opacity to transparency
- */
+ /* Invert the alpha channel from opacity to transparency */
if (transforms & PNG_TRANSFORM_INVERT_ALPHA)
- png_set_invert_alpha(png_ptr);
+ png_set_invert_alpha(png_ptr);
#endif
/* Added at libpng-1.2.41 */
#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
- /* Expand grayscale image to RGB
- */
+ /* Expand grayscale image to RGB */
if (transforms & PNG_TRANSFORM_GRAY_TO_RGB)
- png_set_gray_to_rgb(png_ptr);
+ png_set_gray_to_rgb(png_ptr);
#endif
/* We don't handle adding filler bytes */
+ /* We use png_read_image and rely on that for interlace handling, but we also
+ * call png_read_update_info therefore must turn on interlace handling now:
+ */
+ (void)png_set_interlace_handling(png_ptr);
+
/* Optional call to gamma correct and add the background to the palette
* and update info structure. REQUIRED if you are expecting libpng to
* update the palette for you (i.e., you selected such a transform above).
png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
if (info_ptr->row_pointers == NULL)
{
- png_uint_32 iptr;
+ png_uint_32 iptr;
info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr,
- info_ptr->height * png_sizeof(png_bytep));
+ info_ptr->height * png_sizeof(png_bytep));
for (iptr=0; iptr<info_ptr->height; iptr++)
info_ptr->row_pointers[iptr] = NULL;
/* Read rest of file, and get additional chunks in info_ptr - REQUIRED */
png_read_end(png_ptr, info_ptr);
- transforms = transforms; /* Quiet compiler warnings */
- params = params;
+ PNG_UNUSED(transforms) /* Quiet compiler warnings */
+ PNG_UNUSED(params)
}
#endif /* PNG_INFO_IMAGE_SUPPORTED */
/* pngrio.c - functions for data input
*
- * Last changed in libpng 1.4.1 [February 25, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* libpng use it at run time with png_set_read_fn(...).
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#ifdef PNG_READ_SUPPORTED
#include "pngpriv.h"
+#ifdef PNG_READ_SUPPORTED
+
/* Read the data from whatever input you are using. The default routine
* reads from a file pointer. Note that this routine sometimes gets called
* with very small lengths, so you should implement some kind of simple
png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_debug1(4, "reading %d bytes", (int)length);
-
+
if (png_ptr->read_data_fn != NULL)
(*(png_ptr->read_data_fn))(png_ptr, data, length);
+
else
png_error(png_ptr, "Call to NULL read function");
}
* read_data function and use it at run time with png_set_read_fn(), rather
* than changing the library.
*/
-#ifndef USE_FAR_KEYWORD
-void PNGAPI
+# ifndef USE_FAR_KEYWORD
+void PNGCBAPI
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_size_t check;
if (png_ptr == NULL)
return;
+
/* fread() returns 0 on error, so it is OK to store this in a png_size_t
* instead of an int, which is what fread() actually returns.
*/
if (check != length)
png_error(png_ptr, "Read Error");
}
-#else
+# else
/* This is the model-independent version. Since the standard I/O library
can't handle far buffers in the medium and small models, we have to copy
the data.
#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)
-static void PNGAPI
+static void PNGCBAPI
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_size_t check;
if (png_ptr == NULL)
return;
+
/* Check if data really is near. If so, use usual code. */
n_data = (png_byte *)CVT_PTR_NOCHECK(data);
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
+
if ((png_bytep)n_data == data)
{
check = fread(n_data, 1, length, io_ptr);
}
+
else
{
png_byte buf[NEAR_BUF_SIZE];
png_size_t read, remaining, err;
check = 0;
remaining = length;
+
do
{
read = MIN(NEAR_BUF_SIZE, remaining);
err = fread(buf, 1, read, io_ptr);
png_memcpy(data, buf, read); /* copy far buffer to near buffer */
+
if (err != read)
break;
+
else
check += err;
+
data += read;
remaining -= read;
}
while (remaining != 0);
}
+
if ((png_uint_32)check != (png_uint_32)length)
png_error(png_ptr, "read Error");
}
-#endif
+# endif
#endif
/* This function allows the application to supply a new input function
* for libpng if standard C streams aren't being used.
*
* This function takes as its arguments:
+ *
* png_ptr - pointer to a png input data structure
+ *
* io_ptr - pointer to user supplied structure containing info about
* the input functions. May be NULL.
+ *
* read_data_fn - pointer to a new input function that takes as its
* arguments a pointer to a png_struct, a pointer to
* a location where input data can be stored, and a 32-bit
{
if (png_ptr == NULL)
return;
+
png_ptr->io_ptr = io_ptr;
#ifdef PNG_STDIO_SUPPORTED
if (read_data_fn != NULL)
png_ptr->read_data_fn = read_data_fn;
+
else
png_ptr->read_data_fn = png_default_read_data;
#else
{
png_ptr->write_data_fn = NULL;
png_warning(png_ptr,
- "It's an error to set both read_data_fn and write_data_fn in the ");
- png_warning(png_ptr,
- "same structure. Resetting write_data_fn to NULL");
+ "Can't set both read_data_fn and write_data_fn in the"
+ " same structure");
}
#ifdef PNG_WRITE_FLUSH_SUPPORTED
/* pngrtran.c - transforms the data in a row for PNG readers
*
- * Last changed in libpng 1.4.2 [May 6, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* in pngtrans.c.
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#ifdef PNG_READ_SUPPORTED
#include "pngpriv.h"
+#ifdef PNG_READ_SUPPORTED
+
/* Set the action on getting a CRC error for an ancillary or critical chunk. */
void PNGAPI
png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action)
{
png_debug(1, "in png_set_crc_action");
-
+
if (png_ptr == NULL)
return;
}
}
-#if defined(PNG_READ_BACKGROUND_SUPPORTED) && \
- defined(PNG_FLOATING_POINT_SUPPORTED)
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
/* Handle alpha and tRNS via a background color */
-void PNGAPI
-png_set_background(png_structp png_ptr,
- png_color_16p background_color, int background_gamma_code,
- int need_expand, double background_gamma)
+void PNGFAPI
+png_set_background_fixed(png_structp png_ptr,
+ png_const_color_16p background_color, int background_gamma_code,
+ int need_expand, png_fixed_point background_gamma)
{
- png_debug(1, "in png_set_background");
-
+ png_debug(1, "in png_set_background_fixed");
+
if (png_ptr == NULL)
return;
+
if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN)
{
png_warning(png_ptr, "Application must supply a known background gamma");
png_ptr->transformations |= PNG_BACKGROUND;
png_memcpy(&(png_ptr->background), background_color,
png_sizeof(png_color_16));
- png_ptr->background_gamma = (float)background_gamma;
+ png_ptr->background_gamma = background_gamma;
png_ptr->background_gamma_type = (png_byte)(background_gamma_code);
png_ptr->transformations |= (need_expand ? PNG_BACKGROUND_EXPAND : 0);
}
-#endif
+
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+void PNGAPI
+png_set_background(png_structp png_ptr,
+ png_const_color_16p background_color, int background_gamma_code,
+ int need_expand, double background_gamma)
+{
+ png_set_background_fixed(png_ptr, background_color, background_gamma_code,
+ need_expand, png_fixed(png_ptr, background_gamma, "png_set_background"));
+}
+# endif /* FLOATING_POINT */
+#endif /* READ_BACKGROUND */
#ifdef PNG_READ_16_TO_8_SUPPORTED
/* Strip 16 bit depth files to 8 bit depth */
if (png_ptr == NULL)
return;
+
png_ptr->transformations |= PNG_16_TO_8;
+ png_ptr->transformations &= ~PNG_EXPAND_16;
}
#endif
if (png_ptr == NULL)
return;
- png_ptr->flags |= PNG_FLAG_STRIP_ALPHA;
+
+ png_ptr->transformations |= PNG_STRIP_ALPHA;
}
#endif
#ifdef PNG_READ_QUANTIZE_SUPPORTED
-/* Quantize file to 8 bit. Supply a palette, the current number
+/* Dither file to 8 bit. Supply a palette, the current number
* of elements in the palette, the maximum number of elements
* allowed, and a histogram if possible. If the current number
* of colors is greater then the maximum number, the palette will be
* modified to fit in the maximum number. "full_quantize" indicates
- * whether we need a quantizeing cube set up for RGB images, or if we
+ * whether we need a quantizing cube set up for RGB images, or if we
* simply are reducing the number of colors in a paletted image.
*/
void PNGAPI
png_set_quantize(png_structp png_ptr, png_colorp palette,
- int num_palette, int maximum_colors, png_uint_16p histogram,
- int full_quantize)
+ int num_palette, int maximum_colors, png_const_uint_16p histogram,
+ int full_quantize)
{
png_debug(1, "in png_set_quantize");
if (png_ptr == NULL)
return;
+
png_ptr->transformations |= PNG_QUANTIZE;
if (!full_quantize)
int i;
png_ptr->quantize_index = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)(num_palette * png_sizeof(png_byte)));
+ (png_uint_32)(num_palette * png_sizeof(png_byte)));
for (i = 0; i < num_palette; i++)
png_ptr->quantize_index[i] = (png_byte)i;
}
/* Initialize an array to sort colors */
png_ptr->quantize_sort = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)(num_palette * png_sizeof(png_byte)));
+ (png_uint_32)(num_palette * png_sizeof(png_byte)));
/* Initialize the quantize_sort array */
for (i = 0; i < num_palette; i++)
done = 0;
}
}
+
if (done)
break;
}
do
j--;
while ((int)png_ptr->quantize_sort[j] >= maximum_colors);
+
palette[i] = palette[j];
}
}
/* Initialize palette index arrays */
png_ptr->index_to_palette = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)(num_palette * png_sizeof(png_byte)));
+ (png_uint_32)(num_palette * png_sizeof(png_byte)));
png_ptr->palette_to_index = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)(num_palette * png_sizeof(png_byte)));
+ (png_uint_32)(num_palette * png_sizeof(png_byte)));
/* Initialize the sort array */
for (i = 0; i < num_palette; i++)
}
hash = (png_dsortpp)png_calloc(png_ptr, (png_uint_32)(769 *
- png_sizeof(png_dsortp)));
+ png_sizeof(png_dsortp)));
num_new_palette = num_palette;
t = (png_dsortp)png_malloc_warn(png_ptr,
(png_uint_32)(png_sizeof(png_dsort)));
+
if (t == NULL)
break;
+
t->next = hash[d];
t->left = (png_byte)i;
t->right = (png_byte)j;
for (p = hash[i]; p; p = p->next)
{
if ((int)png_ptr->index_to_palette[p->left]
- < num_new_palette &&
- (int)png_ptr->index_to_palette[p->right]
- < num_new_palette)
+ < num_new_palette &&
+ (int)png_ptr->index_to_palette[p->right]
+ < num_new_palette)
{
int j, next_j;
num_new_palette--;
palette[png_ptr->index_to_palette[j]]
- = palette[num_new_palette];
+ = palette[num_new_palette];
if (!full_quantize)
{
int k;
for (k = 0; k < num_palette; k++)
{
if (png_ptr->quantize_index[k] ==
- png_ptr->index_to_palette[j])
+ png_ptr->index_to_palette[j])
png_ptr->quantize_index[k] =
- png_ptr->index_to_palette[next_j];
+ png_ptr->index_to_palette[next_j];
+
if ((int)png_ptr->quantize_index[k] ==
- num_new_palette)
+ num_new_palette)
png_ptr->quantize_index[k] =
- png_ptr->index_to_palette[j];
+ png_ptr->index_to_palette[j];
}
}
png_ptr->index_to_palette[png_ptr->palette_to_index
- [num_new_palette]] = png_ptr->index_to_palette[j];
+ [num_new_palette]] = png_ptr->index_to_palette[j];
+
png_ptr->palette_to_index[png_ptr->index_to_palette[j]]
- = png_ptr->palette_to_index[num_new_palette];
+ = png_ptr->palette_to_index[num_new_palette];
png_ptr->index_to_palette[j] =
(png_byte)num_new_palette;
+
png_ptr->palette_to_index[num_new_palette] =
(png_byte)j;
}
int i;
png_bytep distance;
int total_bits = PNG_QUANTIZE_RED_BITS + PNG_QUANTIZE_GREEN_BITS +
- PNG_QUANTIZE_BLUE_BITS;
+ PNG_QUANTIZE_BLUE_BITS;
int num_red = (1 << PNG_QUANTIZE_RED_BITS);
int num_green = (1 << PNG_QUANTIZE_GREEN_BITS);
int num_blue = (1 << PNG_QUANTIZE_BLUE_BITS);
png_size_t num_entries = ((png_size_t)1 << total_bits);
- png_ptr->palette_lookup = (png_bytep )png_calloc(png_ptr,
- (png_uint_32)(num_entries * png_sizeof(png_byte)));
+ png_ptr->palette_lookup = (png_bytep)png_calloc(png_ptr,
+ (png_uint_32)(num_entries * png_sizeof(png_byte)));
distance = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_entries *
- png_sizeof(png_byte)));
+ png_sizeof(png_byte)));
+
png_memset(distance, 0xff, num_entries * png_sizeof(png_byte));
for (i = 0; i < num_palette; i++)
}
#endif /* PNG_READ_QUANTIZE_SUPPORTED */
-#if defined(PNG_READ_GAMMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED)
+#ifdef PNG_READ_GAMMA_SUPPORTED
/* Transform the image from the file_gamma to the screen_gamma. We
* only do transformations on images where the file_gamma and screen_gamma
* are not close reciprocals, otherwise it slows things down slightly, and
* are present in the tRNS array for palette images. We can't do it here
* because we don't necessarily have the tRNS chunk yet.
*/
-void PNGAPI
-png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma)
+static int /* PRIVATE */
+png_gamma_threshold(png_fixed_point scrn_gamma, png_fixed_point file_gamma)
+{
+ /* PNG_GAMMA_THRESHOLD is the threshold for performing gamma
+ * correction as a difference of the overall transform from 1.0
+ *
+ * We want to compare the threshold with s*f - 1, if we get
+ * overflow here it is because of wacky gamma values so we
+ * turn on processing anyway.
+ */
+ png_fixed_point gtest;
+ return !png_muldiv(>est, scrn_gamma, file_gamma, PNG_FP_1) ||
+ png_gamma_significant(gtest);
+}
+
+void PNGFAPI
+png_set_gamma_fixed(png_structp png_ptr, png_fixed_point scrn_gamma,
+ png_fixed_point file_gamma)
{
- png_debug(1, "in png_set_gamma");
+ png_debug(1, "in png_set_gamma_fixed");
if (png_ptr == NULL)
return;
- if ((fabs(scrn_gamma * file_gamma - 1.0) > PNG_GAMMA_THRESHOLD) ||
- (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) ||
- (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE))
- png_ptr->transformations |= PNG_GAMMA;
- png_ptr->gamma = (float)file_gamma;
- png_ptr->screen_gamma = (float)scrn_gamma;
+ if ((png_ptr->color_type & PNG_COLOR_MASK_ALPHA) ||
+ (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
+ png_gamma_threshold(scrn_gamma, file_gamma))
+ png_ptr->transformations |= PNG_GAMMA;
+ png_ptr->gamma = file_gamma;
+ png_ptr->screen_gamma = scrn_gamma;
}
-#endif
+
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+void PNGAPI
+png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma)
+{
+ png_set_gamma_fixed(png_ptr,
+ png_fixed(png_ptr, scrn_gamma, "png_set_gamma screen gamma"),
+ png_fixed(png_ptr, file_gamma, "png_set_gamma file gamma"));
+}
+# endif /* FLOATING_POINT_SUPPORTED */
+#endif /* READ_GAMMA */
#ifdef PNG_READ_EXPAND_SUPPORTED
/* Expand paletted images to RGB, expand grayscale images of
}
#endif /* defined(PNG_READ_EXPAND_SUPPORTED) */
-#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+/* Expand to 16 bit channels, expand the tRNS chunk too (because otherwise
+ * it may not work correctly.)
+ */
void PNGAPI
-png_set_gray_to_rgb(png_structp png_ptr)
+png_set_expand_16(png_structp png_ptr)
{
- png_debug(1, "in png_set_gray_to_rgb");
+ png_debug(1, "in png_set_expand_16");
+
+ if (png_ptr == NULL)
+ return;
+
+ png_ptr->transformations |= (PNG_EXPAND_16 | PNG_EXPAND | PNG_EXPAND_tRNS);
+ png_ptr->transformations &= ~PNG_16_TO_8;
- png_ptr->transformations |= PNG_GRAY_TO_RGB;
png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
}
#endif
-#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-/* Convert a RGB image to a grayscale of the same width. This allows us,
- * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image.
- */
-
+#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
void PNGAPI
-png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red,
- double green)
+png_set_gray_to_rgb(png_structp png_ptr)
{
- int red_fixed = (int)((float)red*100000.0 + 0.5);
- int green_fixed = (int)((float)green*100000.0 + 0.5);
- if (png_ptr == NULL)
- return;
- png_set_rgb_to_gray_fixed(png_ptr, error_action, red_fixed, green_fixed);
+ png_debug(1, "in png_set_gray_to_rgb");
+
+ if (png_ptr != NULL)
+ {
+ /* Because rgb must be 8 bits or more: */
+ png_set_expand_gray_1_2_4_to_8(png_ptr);
+ png_ptr->transformations |= PNG_GRAY_TO_RGB;
+ png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
+ }
}
#endif
-void PNGAPI
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+void PNGFAPI
png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
- png_fixed_point red, png_fixed_point green)
+ png_fixed_point red, png_fixed_point green)
{
png_debug(1, "in png_set_rgb_to_gray");
switch(error_action)
{
- case 1: png_ptr->transformations |= PNG_RGB_TO_GRAY;
- break;
+ case 1:
+ png_ptr->transformations |= PNG_RGB_TO_GRAY;
+ break;
- case 2: png_ptr->transformations |= PNG_RGB_TO_GRAY_WARN;
- break;
+ case 2:
+ png_ptr->transformations |= PNG_RGB_TO_GRAY_WARN;
+ break;
+
+ case 3:
+ png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR;
+ break;
- case 3: png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR;
+ default:
+ png_error(png_ptr, "invalid error action to rgb_to_gray");
+ break;
}
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
#ifdef PNG_READ_EXPAND_SUPPORTED
{
png_warning(png_ptr,
"Cannot do RGB_TO_GRAY without EXPAND_SUPPORTED");
+
png_ptr->transformations &= ~PNG_RGB_TO_GRAY;
}
#endif
red_int = 6968; /* .212671 * 32768 + .5 */
green_int = 23434; /* .715160 * 32768 + .5 */
}
+
else if (red + green < 100000L)
{
red_int = (png_uint_16)(((png_uint_32)red*32768L)/100000L);
green_int = (png_uint_16)(((png_uint_32)green*32768L)/100000L);
}
+
else
{
png_warning(png_ptr, "ignoring out of range rgb_to_gray coefficients");
red_int = 6968;
green_int = 23434;
}
+
png_ptr->rgb_to_gray_red_coeff = red_int;
png_ptr->rgb_to_gray_green_coeff = green_int;
png_ptr->rgb_to_gray_blue_coeff =
- (png_uint_16)(32768 - red_int - green_int);
+ (png_uint_16)(32768 - red_int - green_int);
}
}
+
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+/* Convert a RGB image to a grayscale of the same width. This allows us,
+ * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image.
+ */
+
+void PNGAPI
+png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red,
+ double green)
+{
+ if (png_ptr == NULL)
+ return;
+
+ png_set_rgb_to_gray_fixed(png_ptr, error_action,
+ png_fixed(png_ptr, red, "rgb to gray red coefficient"),
+ png_fixed(png_ptr, green, "rgb to gray green coefficient"));
+}
+#endif /* FLOATING POINT */
+
#endif
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
void PNGAPI
png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
- read_user_transform_fn)
+ read_user_transform_fn)
{
png_debug(1, "in png_set_read_user_transform_fn");
if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
!(color_type & PNG_COLOR_MASK_COLOR))
{
- png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
- } else if ((png_ptr->transformations & PNG_BACKGROUND) &&
- !(png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
- (png_ptr->transformations & PNG_GRAY_TO_RGB) &&
- png_ptr->background.red == png_ptr->background.green &&
- png_ptr->background.red == png_ptr->background.blue)
+ png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
+ }
+
+ else if ((png_ptr->transformations & PNG_BACKGROUND) &&
+ !(png_ptr->transformations & PNG_BACKGROUND_EXPAND) &&
+ (png_ptr->transformations & PNG_GRAY_TO_RGB) &&
+ png_ptr->background.red == png_ptr->background.green &&
+ png_ptr->background.red == png_ptr->background.blue)
{
- png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
- png_ptr->background.gray = png_ptr->background.red;
+ png_ptr->mode |= PNG_BACKGROUND_IS_GRAY;
+ png_ptr->background.gray = png_ptr->background.red;
}
#endif
case 1:
png_ptr->background.gray *= (png_uint_16)0xff;
png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
+ = png_ptr->background.blue = png_ptr->background.gray;
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
{
png_ptr->trans_color.gray *= (png_uint_16)0xff;
png_ptr->trans_color.red = png_ptr->trans_color.green
- = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
+ = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
}
break;
case 2:
png_ptr->background.gray *= (png_uint_16)0x55;
png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
+ = png_ptr->background.blue = png_ptr->background.gray;
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
{
- png_ptr->trans_color.gray *= (png_uint_16)0x55;
- png_ptr->trans_color.red = png_ptr->trans_color.green
- = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
+ png_ptr->trans_color.gray *= (png_uint_16)0x55;
+ png_ptr->trans_color.red = png_ptr->trans_color.green
+ = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
}
break;
case 4:
png_ptr->background.gray *= (png_uint_16)0x11;
png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
+ = png_ptr->background.blue = png_ptr->background.gray;
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
{
- png_ptr->trans_color.gray *= (png_uint_16)0x11;
- png_ptr->trans_color.red = png_ptr->trans_color.green
- = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
+ png_ptr->trans_color.gray *= (png_uint_16)0x11;
+ png_ptr->trans_color.red = png_ptr->trans_color.green
+ = png_ptr->trans_color.blue = png_ptr->trans_color.gray;
}
break;
+ default:
+
case 8:
case 16:
png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
+ = png_ptr->background.blue = png_ptr->background.gray;
break;
}
}
else if (color_type == PNG_COLOR_TYPE_PALETTE)
{
png_ptr->background.red =
- png_ptr->palette[png_ptr->background.index].red;
+ png_ptr->palette[png_ptr->background.index].red;
png_ptr->background.green =
- png_ptr->palette[png_ptr->background.index].green;
+ png_ptr->palette[png_ptr->background.index].green;
png_ptr->background.blue =
- png_ptr->palette[png_ptr->background.index].blue;
+ png_ptr->palette[png_ptr->background.index].blue;
#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_INVERT_ALPHA)
if (!(png_ptr->transformations & PNG_EXPAND_tRNS))
#endif
{
- /* Invert the alpha channel (in tRNS) unless the pixels are
- * going to be expanded, in which case leave it for later
- */
+ /* Invert the alpha channel (in tRNS) unless the pixels are
+ * going to be expanded, in which case leave it for later
+ */
int i, istop;
istop=(int)png_ptr->num_trans;
for (i=0; i<istop; i++)
- png_ptr->trans_alpha[i] = (png_byte)(255 - png_ptr->trans_alpha[i]);
+ png_ptr->trans_alpha[i] = (png_byte)(255 -
+ png_ptr->trans_alpha[i]);
}
}
#endif
#if defined(PNG_READ_BACKGROUND_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED)
png_ptr->background_1 = png_ptr->background;
#endif
-#if defined(PNG_READ_GAMMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED)
+#ifdef PNG_READ_GAMMA_SUPPORTED
if ((color_type == PNG_COLOR_TYPE_PALETTE && png_ptr->num_trans != 0)
- && (fabs(png_ptr->screen_gamma * png_ptr->gamma - 1.0)
- < PNG_GAMMA_THRESHOLD))
+ && png_gamma_threshold(png_ptr->screen_gamma, png_ptr->gamma))
{
- int i, k;
- k=0;
- for (i=0; i<png_ptr->num_trans; i++)
- {
- if (png_ptr->trans_alpha[i] != 0 && png_ptr->trans_alpha[i] != 0xff)
- k=1; /* Partial transparency is present */
- }
- if (k == 0)
- png_ptr->transformations &= ~PNG_GAMMA;
+ int i, k;
+ k=0;
+
for (i=0; i<png_ptr->num_trans; i++)
+ {
+ if (png_ptr->trans_alpha[i] != 0 && png_ptr->trans_alpha[i] != 0xff)
+ k=1; /* Partial transparency is present */
+ }
+ if (k == 0)
+ png_ptr->transformations &= ~PNG_GAMMA;
}
if ((png_ptr->transformations & (PNG_GAMMA | PNG_RGB_TO_GRAY)) &&
- png_ptr->gamma != 0.0)
+ png_ptr->gamma != 0)
{
png_build_gamma_table(png_ptr, png_ptr->bit_depth);
{
if (color_type == PNG_COLOR_TYPE_PALETTE)
{
- /* Could skip if no transparency */
+ /* Could skip if no transparency */
png_color back, back_1;
png_colorp palette = png_ptr->palette;
int num_palette = png_ptr->num_palette;
int i;
if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_FILE)
{
+
back.red = png_ptr->gamma_table[png_ptr->background.red];
back.green = png_ptr->gamma_table[png_ptr->background.green];
back.blue = png_ptr->gamma_table[png_ptr->background.blue];
}
else
{
- double g, gs;
+ png_fixed_point g, gs;
switch (png_ptr->background_gamma_type)
{
case PNG_BACKGROUND_GAMMA_SCREEN:
g = (png_ptr->screen_gamma);
- gs = 1.0;
+ gs = PNG_FP_1;
break;
case PNG_BACKGROUND_GAMMA_FILE:
- g = 1.0 / (png_ptr->gamma);
- gs = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma);
+ g = png_reciprocal(png_ptr->gamma);
+ gs = png_reciprocal2(png_ptr->gamma,
+ png_ptr->screen_gamma);
break;
case PNG_BACKGROUND_GAMMA_UNIQUE:
- g = 1.0 / (png_ptr->background_gamma);
- gs = 1.0 / (png_ptr->background_gamma *
- png_ptr->screen_gamma);
+ g = png_reciprocal(png_ptr->background_gamma);
+ gs = png_reciprocal2(png_ptr->background_gamma,
+ png_ptr->screen_gamma);
break;
default:
- g = 1.0; /* back_1 */
- gs = 1.0; /* back */
+ g = PNG_FP_1; /* back_1 */
+ gs = PNG_FP_1; /* back */
+ break;
}
- if ( fabs(gs - 1.0) < PNG_GAMMA_THRESHOLD)
+ if (png_gamma_significant(gs))
{
back.red = (png_byte)png_ptr->background.red;
back.green = (png_byte)png_ptr->background.green;
back.blue = (png_byte)png_ptr->background.blue;
}
+
else
{
- back.red = (png_byte)(pow(
- (double)png_ptr->background.red/255.0, gs) * 255.0 + .5);
- back.green = (png_byte)(pow(
- (double)png_ptr->background.green/255.0, gs) * 255.0
- + .5);
- back.blue = (png_byte)(pow(
- (double)png_ptr->background.blue/255.0, gs) * 255.0 + .5);
+ back.red = png_gamma_8bit_correct(png_ptr->background.red,
+ gs);
+ back.green = png_gamma_8bit_correct(png_ptr->background.green,
+ gs);
+ back.blue = png_gamma_8bit_correct(png_ptr->background.blue,
+ gs);
}
-
- back_1.red = (png_byte)(pow(
- (double)png_ptr->background.red/255.0, g) * 255.0 + .5);
- back_1.green = (png_byte)(pow(
- (double)png_ptr->background.green/255.0, g) * 255.0 + .5);
- back_1.blue = (png_byte)(pow(
- (double)png_ptr->background.blue/255.0, g) * 255.0 + .5);
+ back_1.red = png_gamma_8bit_correct(png_ptr->background.red, g);
+ back_1.green = png_gamma_8bit_correct(png_ptr->background.green,
+ g);
+ back_1.blue = png_gamma_8bit_correct(png_ptr->background.blue,
+ g);
}
for (i = 0; i < num_palette; i++)
{
- if (i < (int)png_ptr->num_trans && png_ptr->trans_alpha[i] != 0xff)
+ if (i < (int)png_ptr->num_trans &&
+ png_ptr->trans_alpha[i] != 0xff)
{
if (png_ptr->trans_alpha[i] == 0)
{
png_ptr->transformations &= ~PNG_GAMMA;
png_ptr->transformations |= PNG_STRIP_ALPHA;
}
+
/* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN) */
else
/* color_type != PNG_COLOR_TYPE_PALETTE */
{
- double m = (double)(((png_uint_32)1 << png_ptr->bit_depth) - 1);
- double g = 1.0;
- double gs = 1.0;
+ png_fixed_point g = PNG_FP_1;
+ png_fixed_point gs = PNG_FP_1;
switch (png_ptr->background_gamma_type)
{
case PNG_BACKGROUND_GAMMA_SCREEN:
- g = (png_ptr->screen_gamma);
- gs = 1.0;
+ g = png_ptr->screen_gamma;
+ /* gs = PNG_FP_1; */
break;
case PNG_BACKGROUND_GAMMA_FILE:
- g = 1.0 / (png_ptr->gamma);
- gs = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma);
+ g = png_reciprocal(png_ptr->gamma);
+ gs = png_reciprocal2(png_ptr->gamma, png_ptr->screen_gamma);
break;
case PNG_BACKGROUND_GAMMA_UNIQUE:
- g = 1.0 / (png_ptr->background_gamma);
- gs = 1.0 / (png_ptr->background_gamma *
- png_ptr->screen_gamma);
+ g = png_reciprocal(png_ptr->background_gamma);
+ gs = png_reciprocal2(png_ptr->background_gamma,
+ png_ptr->screen_gamma);
break;
+
+ default:
+ png_error(png_ptr, "invalid background gamma type");
}
- png_ptr->background_1.gray = (png_uint_16)(pow(
- (double)png_ptr->background.gray / m, g) * m + .5);
- png_ptr->background.gray = (png_uint_16)(pow(
- (double)png_ptr->background.gray / m, gs) * m + .5);
+ png_ptr->background_1.gray = png_gamma_correct(png_ptr,
+ png_ptr->background.gray, g);
+
+ png_ptr->background.gray = png_gamma_correct(png_ptr,
+ png_ptr->background.gray, gs);
if ((png_ptr->background.red != png_ptr->background.green) ||
(png_ptr->background.red != png_ptr->background.blue) ||
(png_ptr->background.red != png_ptr->background.gray))
{
/* RGB or RGBA with color background */
- png_ptr->background_1.red = (png_uint_16)(pow(
- (double)png_ptr->background.red / m, g) * m + .5);
- png_ptr->background_1.green = (png_uint_16)(pow(
- (double)png_ptr->background.green / m, g) * m + .5);
- png_ptr->background_1.blue = (png_uint_16)(pow(
- (double)png_ptr->background.blue / m, g) * m + .5);
- png_ptr->background.red = (png_uint_16)(pow(
- (double)png_ptr->background.red / m, gs) * m + .5);
- png_ptr->background.green = (png_uint_16)(pow(
- (double)png_ptr->background.green / m, gs) * m + .5);
- png_ptr->background.blue = (png_uint_16)(pow(
- (double)png_ptr->background.blue / m, gs) * m + .5);
+ png_ptr->background_1.red = png_gamma_correct(png_ptr,
+ png_ptr->background.red, g);
+
+ png_ptr->background_1.green = png_gamma_correct(png_ptr,
+ png_ptr->background.green, g);
+
+ png_ptr->background_1.blue = png_gamma_correct(png_ptr,
+ png_ptr->background.blue, g);
+
+ png_ptr->background.red = png_gamma_correct(png_ptr,
+ png_ptr->background.red, gs);
+
+ png_ptr->background.green = png_gamma_correct(png_ptr,
+ png_ptr->background.green, gs);
+
+ png_ptr->background.blue = png_gamma_correct(png_ptr,
+ png_ptr->background.blue, gs);
}
+
else
{
/* GRAY, GRAY ALPHA, RGB, or RGBA with gray background */
png_ptr->background_1.red = png_ptr->background_1.green
- = png_ptr->background_1.blue = png_ptr->background_1.gray;
+ = png_ptr->background_1.blue = png_ptr->background_1.gray;
+
png_ptr->background.red = png_ptr->background.green
- = png_ptr->background.blue = png_ptr->background.gray;
+ = png_ptr->background.blue = png_ptr->background.gray;
}
}
}
#ifdef PNG_READ_BACKGROUND_SUPPORTED
else
#endif
-#endif /* PNG_READ_GAMMA_SUPPORTED && PNG_FLOATING_POINT_SUPPORTED */
+#endif /* PNG_READ_GAMMA_SUPPORTED */
#ifdef PNG_READ_BACKGROUND_SUPPORTED
/* No GAMMA transformation */
if ((png_ptr->transformations & PNG_BACKGROUND) &&
{
palette[i] = back;
}
+
else if (png_ptr->trans_alpha[i] != 0xff)
{
/* The png_composite() macro is defined in png.h */
png_composite(palette[i].red, palette[i].red,
- png_ptr->trans_alpha[i], back.red);
+ png_ptr->trans_alpha[i], back.red);
+
png_composite(palette[i].green, palette[i].green,
- png_ptr->trans_alpha[i], back.green);
+ png_ptr->trans_alpha[i], back.green);
+
png_composite(palette[i].blue, palette[i].blue,
- png_ptr->trans_alpha[i], back.blue);
+ png_ptr->trans_alpha[i], back.blue);
}
}
#ifdef PNG_READ_SHIFT_SUPPORTED
if ((png_ptr->transformations & PNG_SHIFT) &&
- (color_type == PNG_COLOR_TYPE_PALETTE))
+ (color_type == PNG_COLOR_TYPE_PALETTE))
{
png_uint_16 i;
png_uint_16 istop = png_ptr->num_palette;
if (sr < 0 || sr > 8)
sr = 0;
+
if (sg < 0 || sg > 8)
sg = 0;
+
if (sb < 0 || sb > 8)
sb = 0;
+
for (i = 0; i < istop; i++)
{
png_ptr->palette[i].red >>= sr;
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
if (png_ptr->num_trans &&
- (png_ptr->transformations & PNG_EXPAND_tRNS))
+ (png_ptr->transformations & PNG_EXPAND_tRNS))
info_ptr->color_type = PNG_COLOR_TYPE_RGB_ALPHA;
+
else
info_ptr->color_type = PNG_COLOR_TYPE_RGB;
+
info_ptr->bit_depth = 8;
info_ptr->num_trans = 0;
}
if (png_ptr->num_trans)
{
if (png_ptr->transformations & PNG_EXPAND_tRNS)
- info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
+ info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
}
if (info_ptr->bit_depth < 8)
info_ptr->bit_depth = 8;
+
info_ptr->num_trans = 0;
}
}
#endif
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+ if (png_ptr->transformations & PNG_EXPAND_16 && info_ptr->bit_depth == 8 &&
+ info_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
+ {
+ info_ptr->bit_depth = 16;
+ }
+#endif
+
#ifdef PNG_READ_BACKGROUND_SUPPORTED
if (png_ptr->transformations & PNG_BACKGROUND)
{
- info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA;
+ info_ptr->color_type = (png_byte)(info_ptr->color_type &
+ ~PNG_COLOR_MASK_ALPHA);
info_ptr->num_trans = 0;
info_ptr->background = png_ptr->background;
}
#ifdef PNG_READ_GAMMA_SUPPORTED
if (png_ptr->transformations & PNG_GAMMA)
{
-#ifdef PNG_FLOATING_POINT_SUPPORTED
info_ptr->gamma = png_ptr->gamma;
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
- info_ptr->int_gamma = png_ptr->int_gamma;
-#endif
}
#endif
#ifdef PNG_READ_16_TO_8_SUPPORTED
+#ifdef PNG_READ_16BIT_SUPPORTED
if ((png_ptr->transformations & PNG_16_TO_8) && (info_ptr->bit_depth == 16))
info_ptr->bit_depth = 8;
+#else
+ /* Force chopping 16-bit input down to 8 */
+ if (info_ptr->bit_depth == 16)
+ {
+ png_ptr->transformations |=PNG_16_TO_8;
+ info_ptr->bit_depth = 8;
+ }
+#endif
#endif
#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
info_ptr->channels = 1;
+
else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
info_ptr->channels = 3;
+
else
info_ptr->channels = 1;
#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
- if (png_ptr->flags & PNG_FLAG_STRIP_ALPHA)
+ if (png_ptr->transformations & PNG_STRIP_ALPHA)
info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA;
#endif
info_ptr->channels++;
/* If adding a true alpha channel not just filler */
if (png_ptr->transformations & PNG_ADD_ALPHA)
- info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
+ info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
}
#endif
#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) && \
defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
if (png_ptr->transformations & PNG_USER_TRANSFORM)
- {
- if (info_ptr->bit_depth < png_ptr->user_transform_depth)
+ {
+ if (info_ptr->bit_depth < png_ptr->user_transform_depth)
info_ptr->bit_depth = png_ptr->user_transform_depth;
- if (info_ptr->channels < png_ptr->user_transform_channels)
+
+ if (info_ptr->channels < png_ptr->user_transform_channels)
info_ptr->channels = png_ptr->user_transform_channels;
- }
+ }
#endif
info_ptr->pixel_depth = (png_byte)(info_ptr->channels *
- info_ptr->bit_depth);
+ info_ptr->bit_depth);
info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, info_ptr->width);
if (png_ptr->row_buf == NULL)
{
-#ifdef PNG_STDIO_SUPPORTED
+#ifdef PNG_CONSOLE_IO_SUPPORTED
char msg[50];
png_snprintf2(msg, 50,
- "NULL row buffer for row %ld, pass %d", (long)png_ptr->row_number,
- png_ptr->pass);
+ "NULL row buffer for row %ld, pass %d", (long)png_ptr->row_number,
+ png_ptr->pass);
png_error(png_ptr, msg);
#else
png_error(png_ptr, "NULL row buffer");
if (png_ptr->row_info.color_type == PNG_COLOR_TYPE_PALETTE)
{
png_do_expand_palette(&(png_ptr->row_info), png_ptr->row_buf + 1,
- png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans);
+ png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans);
}
+
else
{
if (png_ptr->num_trans &&
(png_ptr->transformations & PNG_EXPAND_tRNS))
png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1,
- &(png_ptr->trans_color));
+ &(png_ptr->trans_color));
+
else
png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1,
- NULL);
+ NULL);
}
}
#endif
+ /* Delay the 'expand 16' step until later for efficiency, so that the
+ * intermediate steps work with 8 bit data.
+ */
+
#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
- if (png_ptr->flags & PNG_FLAG_STRIP_ALPHA)
- png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
- PNG_FLAG_FILLER_AFTER | (png_ptr->flags & PNG_FLAG_STRIP_ALPHA));
+ if ((png_ptr->transformations & PNG_STRIP_ALPHA) &&
+ (png_ptr->row_info.color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
+ png_ptr->row_info.color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
+ png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ 0/*!at_start, because SWAP_ALPHA happens later*/);
#endif
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
if (png_ptr->transformations & PNG_RGB_TO_GRAY)
{
int rgb_error =
- png_do_rgb_to_gray(png_ptr, &(png_ptr->row_info),
- png_ptr->row_buf + 1);
+ png_do_rgb_to_gray(png_ptr, &(png_ptr->row_info),
+ png_ptr->row_buf + 1);
+
if (rgb_error)
{
png_ptr->rgb_to_gray_status=1;
if ((png_ptr->transformations & PNG_RGB_TO_GRAY) ==
PNG_RGB_TO_GRAY_WARN)
png_warning(png_ptr, "png_do_rgb_to_gray found nongray pixel");
+
if ((png_ptr->transformations & PNG_RGB_TO_GRAY) ==
PNG_RGB_TO_GRAY_ERR)
png_error(png_ptr, "png_do_rgb_to_gray found nongray pixel");
#ifdef PNG_READ_BACKGROUND_SUPPORTED
if ((png_ptr->transformations & PNG_BACKGROUND) &&
- ((png_ptr->num_trans != 0 ) ||
- (png_ptr->color_type & PNG_COLOR_MASK_ALPHA)))
+ ((png_ptr->num_trans != 0) ||
+ (png_ptr->color_type & PNG_COLOR_MASK_ALPHA)))
png_do_background(&(png_ptr->row_info), png_ptr->row_buf + 1,
- &(png_ptr->trans_color), &(png_ptr->background)
+ &(png_ptr->trans_color), &(png_ptr->background)
#ifdef PNG_READ_GAMMA_SUPPORTED
- , &(png_ptr->background_1),
- png_ptr->gamma_table, png_ptr->gamma_from_1,
- png_ptr->gamma_to_1, png_ptr->gamma_16_table,
- png_ptr->gamma_16_from_1, png_ptr->gamma_16_to_1,
- png_ptr->gamma_shift
+ , &(png_ptr->background_1),
+ png_ptr->gamma_table, png_ptr->gamma_from_1,
+ png_ptr->gamma_to_1, png_ptr->gamma_16_table,
+ png_ptr->gamma_16_from_1, png_ptr->gamma_16_to_1,
+ png_ptr->gamma_shift
#endif
-);
+ );
#endif
#ifdef PNG_READ_GAMMA_SUPPORTED
#ifdef PNG_READ_QUANTIZE_SUPPORTED
if (png_ptr->transformations & PNG_QUANTIZE)
{
- png_do_quantize((png_row_infop)&(png_ptr->row_info), png_ptr->row_buf + 1,
- png_ptr->palette_lookup, png_ptr->quantize_index);
- if (png_ptr->row_info.rowbytes == (png_uint_32)0)
+ png_do_quantize(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ png_ptr->palette_lookup, png_ptr->quantize_index);
+
+ if (png_ptr->row_info.rowbytes == 0)
png_error(png_ptr, "png_do_quantize returned rowbytes=0");
}
+#endif /* PNG_READ_QUANTIZE_SUPPORTED */
+
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+ /* Do the expansion now, after all the arithmetic has been done. Notice
+ * that previous transformations can handle the PNG_EXPAND_16 flag if this
+ * is efficient (particularly true in the case of gamma correction, where
+ * better accuracy results faster!)
+ */
+ if (png_ptr->transformations & PNG_EXPAND_16)
+ png_do_expand_16(&png_ptr->row_info, png_ptr->row_buf + 1);
#endif
#ifdef PNG_READ_INVERT_SUPPORTED
#ifdef PNG_READ_SHIFT_SUPPORTED
if (png_ptr->transformations & PNG_SHIFT)
png_do_unshift(&(png_ptr->row_info), png_ptr->row_buf + 1,
- &(png_ptr->shift));
+ &(png_ptr->shift));
#endif
#ifdef PNG_READ_PACK_SUPPORTED
#endif
#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
+ /*NOTE: this must be in the wrong place - what happens if BGR is set too?
+ * Need pngvalid to test this combo.
+ */
/* If gray -> RGB, do so now only if we did not do so above */
if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
#ifdef PNG_READ_FILLER_SUPPORTED
if (png_ptr->transformations & PNG_FILLER)
png_do_read_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
- (png_uint_32)png_ptr->filler, png_ptr->flags);
+ (png_uint_32)png_ptr->filler, png_ptr->flags);
#endif
#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
png_do_read_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
+#ifdef PNG_READ_16BIT_SUPPORTED
#ifdef PNG_READ_SWAP_SUPPORTED
if (png_ptr->transformations & PNG_SWAP_BYTES)
png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
+#endif
#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
if (png_ptr->transformations & PNG_USER_TRANSFORM)
{
if (png_ptr->read_user_transform_fn != NULL)
(*(png_ptr->read_user_transform_fn)) /* User read transform function */
- (png_ptr, /* png_ptr */
- &(png_ptr->row_info), /* row_info: */
- /* png_uint_32 width; width of row */
- /* png_uint_32 rowbytes; number of bytes in row */
- /* png_byte color_type; color type of pixels */
- /* png_byte bit_depth; bit depth of samples */
- /* png_byte channels; number of channels (1-4) */
- /* png_byte pixel_depth; bits per pixel (depth*channels) */
- png_ptr->row_buf + 1); /* start of pixel data for row */
+ (png_ptr, /* png_ptr */
+ &(png_ptr->row_info), /* row_info: */
+ /* png_uint_32 width; width of row */
+ /* png_size_t rowbytes; number of bytes in row */
+ /* png_byte color_type; color type of pixels */
+ /* png_byte bit_depth; bit depth of samples */
+ /* png_byte channels; number of channels (1-4) */
+ /* png_byte pixel_depth; bits per pixel (depth*channels) */
+ png_ptr->row_buf + 1); /* start of pixel data for row */
#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
if (png_ptr->user_transform_depth)
png_ptr->row_info.bit_depth = png_ptr->user_transform_depth;
+
if (png_ptr->user_transform_channels)
png_ptr->row_info.channels = png_ptr->user_transform_channels;
#endif
png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth *
- png_ptr->row_info.channels);
+ png_ptr->row_info.channels);
+
png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth,
- png_ptr->row_info.width);
+ png_ptr->row_info.width);
}
#endif
for (i = 0; i < row_width; i++)
{
*dp = (png_byte)((*sp >> shift) & 0x01);
+
if (shift == 7)
{
shift = 0;
sp--;
}
+
else
shift++;
for (i = 0; i < row_width; i++)
{
*dp = (png_byte)((*sp >> shift) & 0x03);
+
if (shift == 6)
{
shift = 0;
sp--;
}
+
else
shift += 2;
for (i = 0; i < row_width; i++)
{
*dp = (png_byte)((*sp >> shift) & 0x0f);
+
if (shift == 4)
{
shift = 0;
sp--;
}
+
else
shift = 4;
}
break;
}
+
+ default:
+ break;
}
row_info->bit_depth = 8;
row_info->pixel_depth = (png_byte)(8 * row_info->channels);
* the values back to 0 through 31.
*/
void /* PRIVATE */
-png_do_unshift(png_row_infop row_info, png_bytep row, png_color_8p sig_bits)
+png_do_unshift(png_row_infop row_info, png_bytep row,
+ png_const_color_8p sig_bits)
{
png_debug(1, "in png_do_unshift");
shift[channels++] = row_info->bit_depth - sig_bits->green;
shift[channels++] = row_info->bit_depth - sig_bits->blue;
}
+
else
{
shift[channels++] = row_info->bit_depth - sig_bits->gray;
}
+
if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
{
shift[channels++] = row_info->bit_depth - sig_bits->alpha;
{
if (shift[c] <= 0)
shift[c] = 0;
+
else
value = 1;
}
switch (row_info->bit_depth)
{
+ default:
+ break;
+
case 2:
{
png_bytep bp;
- png_uint_32 i;
- png_uint_32 istop = row_info->rowbytes;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
for (bp = row, i = 0; i < istop; i++)
{
case 4:
{
png_bytep bp = row;
- png_uint_32 i;
- png_uint_32 istop = row_info->rowbytes;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
png_byte mask = (png_byte)((((int)0xf0 >> shift[0]) & (int)0xf0) |
- (png_byte)((int)0xf >> shift[0]));
+ (png_byte)((int)0xf >> shift[0]));
for (i = 0; i < istop; i++)
{
break;
}
+#ifdef PNG_READ_16BIT_SUPPORTED
case 16:
{
png_bytep bp = row;
}
break;
}
+#endif
}
}
}
*(--dp) = save;
}
}
+
+#ifdef PNG_READ_16BIT_SUPPORTED
/* This converts from RRGGBBAA to AARRGGBB */
else
{
*(--dp) = save[1];
}
}
+#endif
}
+
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
{
/* This converts from GA to AG */
*(--dp) = save;
}
}
+
+#ifdef PNG_READ_16BIT_SUPPORTED
/* This converts from GGAA to AAGG */
else
{
*(--dp) = save[1];
}
}
+#endif
}
}
}
void /* PRIVATE */
png_do_read_invert_alpha(png_row_infop row_info, png_bytep row)
{
+ png_uint_32 row_width;
png_debug(1, "in png_do_read_invert_alpha");
+ row_width = row_info->width;
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
{
- png_uint_32 row_width = row_info->width;
- if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ if (row_info->bit_depth == 8)
{
/* This inverts the alpha channel in RGBA */
- if (row_info->bit_depth == 8)
- {
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_uint_32 i;
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_uint_32 i;
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = (png_byte)(255 - *(--sp));
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = (png_byte)(255 - *(--sp));
-/* This does nothing:
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- We can replace it with:
+/* This does nothing:
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ We can replace it with:
*/
- sp-=3;
- dp=sp;
- }
+ sp-=3;
+ dp=sp;
}
- /* This inverts the alpha channel in RRGGBBAA */
- else
- {
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_uint_32 i;
+ }
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = (png_byte)(255 - *(--sp));
- *(--dp) = (png_byte)(255 - *(--sp));
+#ifdef PNG_READ_16BIT_SUPPORTED
+ /* This inverts the alpha channel in RRGGBBAA */
+ else
+ {
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_uint_32 i;
-/* This does nothing:
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
- We can replace it with:
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = (png_byte)(255 - *(--sp));
+ *(--dp) = (png_byte)(255 - *(--sp));
+
+/* This does nothing:
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ We can replace it with:
*/
- sp-=6;
- dp=sp;
- }
+ sp-=6;
+ dp=sp;
}
}
- else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+#endif
+ }
+ else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ {
+ if (row_info->bit_depth == 8)
{
/* This inverts the alpha channel in GA */
- if (row_info->bit_depth == 8)
- {
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_uint_32 i;
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_uint_32 i;
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = (png_byte)(255 - *(--sp));
- *(--dp) = *(--sp);
- }
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = (png_byte)(255 - *(--sp));
+ *(--dp) = *(--sp);
}
+ }
+
+#ifdef PNG_READ_16BIT_SUPPORTED
+ else
+ {
/* This inverts the alpha channel in GGAA */
- else
- {
- png_bytep sp = row + row_info->rowbytes;
- png_bytep dp = sp;
- png_uint_32 i;
+ png_bytep sp = row + row_info->rowbytes;
+ png_bytep dp = sp;
+ png_uint_32 i;
- for (i = 0; i < row_width; i++)
- {
- *(--dp) = (png_byte)(255 - *(--sp));
- *(--dp) = (png_byte)(255 - *(--sp));
+ for (i = 0; i < row_width; i++)
+ {
+ *(--dp) = (png_byte)(255 - *(--sp));
+ *(--dp) = (png_byte)(255 - *(--sp));
/*
- *(--dp) = *(--sp);
- *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
+ *(--dp) = *(--sp);
*/
- sp-=2;
- dp=sp;
- }
+ sp-=2;
+ dp=sp;
}
}
+#endif
}
}
#endif
/* Add filler channel if we have RGB color */
void /* PRIVATE */
png_do_read_filler(png_row_infop row_info, png_bytep row,
- png_uint_32 filler, png_uint_32 flags)
+ png_uint_32 filler, png_uint_32 flags)
{
png_uint_32 i;
png_uint_32 row_width = row_info->width;
+#ifdef PNG_READ_16BIT_SUPPORTED
png_byte hi_filler = (png_byte)((filler>>8) & 0xff);
+#endif
png_byte lo_filler = (png_byte)(filler & 0xff);
png_debug(1, "in png_do_read_filler");
{
if (row_info->bit_depth == 8)
{
- /* This changes the data from G to GX */
if (flags & PNG_FLAG_FILLER_AFTER)
{
+ /* This changes the data from G to GX */
png_bytep sp = row + (png_size_t)row_width;
png_bytep dp = sp + (png_size_t)row_width;
for (i = 1; i < row_width; i++)
row_info->pixel_depth = 16;
row_info->rowbytes = row_width * 2;
}
- /* This changes the data from G to XG */
+
else
{
+ /* This changes the data from G to XG */
png_bytep sp = row + (png_size_t)row_width;
png_bytep dp = sp + (png_size_t)row_width;
for (i = 0; i < row_width; i++)
row_info->rowbytes = row_width * 2;
}
}
+
+#ifdef PNG_READ_16BIT_SUPPORTED
else if (row_info->bit_depth == 16)
{
- /* This changes the data from GG to GGXX */
if (flags & PNG_FLAG_FILLER_AFTER)
{
+ /* This changes the data from GG to GGXX */
png_bytep sp = row + (png_size_t)row_width * 2;
png_bytep dp = sp + (png_size_t)row_width * 2;
for (i = 1; i < row_width; i++)
row_info->pixel_depth = 32;
row_info->rowbytes = row_width * 4;
}
- /* This changes the data from GG to XXGG */
+
else
{
+ /* This changes the data from GG to XXGG */
png_bytep sp = row + (png_size_t)row_width * 2;
png_bytep dp = sp + (png_size_t)row_width * 2;
for (i = 0; i < row_width; i++)
row_info->rowbytes = row_width * 4;
}
}
+#endif
} /* COLOR_TYPE == GRAY */
else if (row_info->color_type == PNG_COLOR_TYPE_RGB)
{
if (row_info->bit_depth == 8)
{
- /* This changes the data from RGB to RGBX */
if (flags & PNG_FLAG_FILLER_AFTER)
{
+ /* This changes the data from RGB to RGBX */
png_bytep sp = row + (png_size_t)row_width * 3;
png_bytep dp = sp + (png_size_t)row_width;
for (i = 1; i < row_width; i++)
row_info->pixel_depth = 32;
row_info->rowbytes = row_width * 4;
}
- /* This changes the data from RGB to XRGB */
+
else
{
+ /* This changes the data from RGB to XRGB */
png_bytep sp = row + (png_size_t)row_width * 3;
png_bytep dp = sp + (png_size_t)row_width;
for (i = 0; i < row_width; i++)
row_info->rowbytes = row_width * 4;
}
}
+
+#ifdef PNG_READ_16BIT_SUPPORTED
else if (row_info->bit_depth == 16)
{
- /* This changes the data from RRGGBB to RRGGBBXX */
if (flags & PNG_FLAG_FILLER_AFTER)
{
+ /* This changes the data from RRGGBB to RRGGBBXX */
png_bytep sp = row + (png_size_t)row_width * 6;
png_bytep dp = sp + (png_size_t)row_width * 2;
for (i = 1; i < row_width; i++)
row_info->pixel_depth = 64;
row_info->rowbytes = row_width * 8;
}
- /* This changes the data from RRGGBB to XXRRGGBB */
+
else
{
+ /* This changes the data from RRGGBB to XXRRGGBB */
png_bytep sp = row + (png_size_t)row_width * 6;
png_bytep dp = sp + (png_size_t)row_width * 2;
for (i = 0; i < row_width; i++)
*(--dp) = hi_filler;
*(--dp) = lo_filler;
}
+
row_info->channels = 4;
row_info->pixel_depth = 64;
row_info->rowbytes = row_width * 8;
}
}
+#endif
} /* COLOR_TYPE == RGB */
}
#endif
png_debug(1, "in png_do_gray_to_rgb");
if (row_info->bit_depth >= 8 &&
- !(row_info->color_type & PNG_COLOR_MASK_COLOR))
+ !(row_info->color_type & PNG_COLOR_MASK_COLOR))
{
if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
{
if (row_info->bit_depth == 8)
{
+ /* This changes G to RGB */
png_bytep sp = row + (png_size_t)row_width - 1;
png_bytep dp = sp + (png_size_t)row_width * 2;
for (i = 0; i < row_width; i++)
*(dp--) = *(sp--);
}
}
+
else
{
+ /* This changes GG to RRGGBB */
png_bytep sp = row + (png_size_t)row_width * 2 - 1;
png_bytep dp = sp + (png_size_t)row_width * 4;
for (i = 0; i < row_width; i++)
}
}
}
+
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
{
if (row_info->bit_depth == 8)
{
+ /* This changes GA to RGBA */
png_bytep sp = row + (png_size_t)row_width * 2 - 1;
png_bytep dp = sp + (png_size_t)row_width * 2;
for (i = 0; i < row_width; i++)
*(dp--) = *(sp--);
}
}
+
else
{
+ /* This changes GGAA to RRGGBBAA */
png_bytep sp = row + (png_size_t)row_width * 4 - 1;
png_bytep dp = sp + (png_size_t)row_width * 4;
for (i = 0; i < row_width; i++)
row_info->channels += (png_byte)2;
row_info->color_type |= PNG_COLOR_MASK_COLOR;
row_info->pixel_depth = (png_byte)(row_info->channels *
- row_info->bit_depth);
+ row_info->bit_depth);
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
}
}
png_debug(1, "in png_do_rgb_to_gray");
- if (
- (row_info->color_type & PNG_COLOR_MASK_COLOR))
+ if (!(row_info->color_type & PNG_COLOR_MASK_PALETTE) &&
+ (row_info->color_type & PNG_COLOR_MASK_COLOR))
{
png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff;
png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff;
png_byte red = png_ptr->gamma_to_1[*(sp++)];
png_byte green = png_ptr->gamma_to_1[*(sp++)];
png_byte blue = png_ptr->gamma_to_1[*(sp++)];
+
if (red != green || red != blue)
{
rgb_error |= 1;
*(dp++) = png_ptr->gamma_from_1[
- (rc*red + gc*green + bc*blue)>>15];
+ (rc*red + gc*green + bc*blue)>>15];
}
+
else
*(dp++) = *(sp - 1);
}
png_byte red = *(sp++);
png_byte green = *(sp++);
png_byte blue = *(sp++);
+
if (red != green || red != blue)
{
rgb_error |= 1;
*(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15);
}
+
else
*(dp++) = *(sp - 1);
}
{
png_uint_16 red, green, blue, w;
- red = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
- green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
- blue = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
+ red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
if (red == green && red == blue)
w = red;
+
else
{
- png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) >>
- png_ptr->gamma_shift][red>>8];
+ png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff)
+ >> png_ptr->gamma_shift][red>>8];
png_uint_16 green_1 =
png_ptr->gamma_16_to_1[(green&0xff) >>
- png_ptr->gamma_shift][green>>8];
- png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) >>
- png_ptr->gamma_shift][blue>>8];
+ png_ptr->gamma_shift][green>>8];
+ png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff)
+ >> png_ptr->gamma_shift][blue>>8];
png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1
- + bc*blue_1)>>15);
+ + bc*blue_1)>>15);
w = png_ptr->gamma_16_from_1[(gray16&0xff) >>
png_ptr->gamma_shift][gray16 >> 8];
rgb_error |= 1;
{
png_uint_16 red, green, blue, gray16;
- red = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
- green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
- blue = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
+ red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
if (red != green || red != blue)
rgb_error |= 1;
+
gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15);
*(dp++) = (png_byte)((gray16>>8) & 0xff);
*(dp++) = (png_byte)(gray16 & 0xff);
png_byte red = png_ptr->gamma_to_1[*(sp++)];
png_byte green = png_ptr->gamma_to_1[*(sp++)];
png_byte blue = png_ptr->gamma_to_1[*(sp++)];
+
if (red != green || red != blue)
rgb_error |= 1;
+
*(dp++) = png_ptr->gamma_from_1
- [(rc*red + gc*green + bc*blue)>>15];
+ [(rc*red + gc*green + bc*blue)>>15];
+
*(dp++) = *(sp++); /* alpha */
}
}
png_byte blue = *(sp++);
if (red != green || red != blue)
rgb_error |= 1;
+
*(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15);
*(dp++) = *(sp++); /* alpha */
}
{
png_uint_16 red, green, blue, w;
- red = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
- green = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
- blue = (png_uint_16)(((*(sp))<<8) | *(sp+1)); sp+=2;
+ red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+ blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
if (red == green && red == blue)
w = red;
+
else
{
png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) >>
png_ptr->gamma_shift][red>>8];
+
png_uint_16 green_1 =
png_ptr->gamma_16_to_1[(green&0xff) >>
png_ptr->gamma_shift][green>>8];
+
png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) >>
png_ptr->gamma_shift][blue>>8];
+
png_uint_16 gray16 = (png_uint_16)((rc * red_1
+ gc * green_1 + bc * blue_1)>>15);
+
w = png_ptr->gamma_16_from_1[(gray16&0xff) >>
png_ptr->gamma_shift][gray16 >> 8];
+
rgb_error |= 1;
}
for (i = 0; i < row_width; i++)
{
png_uint_16 red, green, blue, gray16;
- red = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2;
- green = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2;
- blue = (png_uint_16)((*(sp)<<8) | *(sp+1)); sp+=2;
+ red = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
+ green = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
+ blue = (png_uint_16)((*(sp)<<8) | *(sp + 1)); sp += 2;
+
if (red != green || red != blue)
rgb_error |= 1;
+
gray16 = (png_uint_16)((rc*red + gc*green + bc*blue)>>15);
*(dp++) = (png_byte)((gray16>>8) & 0xff);
*(dp++) = (png_byte)(gray16 & 0xff);
}
}
}
- row_info->channels -= (png_byte)2;
- row_info->color_type &= ~PNG_COLOR_MASK_COLOR;
+ row_info->channels -= 2;
+ row_info->color_type = (png_byte)(row_info->color_type &
+ ~PNG_COLOR_MASK_COLOR);
row_info->pixel_depth = (png_byte)(row_info->channels *
- row_info->bit_depth);
+ row_info->bit_depth);
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
}
return rgb_error;
*/
void /* PRIVATE */
png_do_background(png_row_infop row_info, png_bytep row,
- png_color_16p trans_color, png_color_16p background
+ png_const_color_16p trans_color, png_const_color_16p background
#ifdef PNG_READ_GAMMA_SUPPORTED
- , png_color_16p background_1,
- png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1,
- png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1,
- png_uint_16pp gamma_16_to_1, int gamma_shift
+ , png_const_color_16p background_1, png_const_bytep gamma_table,
+ png_const_bytep gamma_from_1, png_const_bytep gamma_to_1,
+ png_const_uint_16pp gamma_16, png_const_uint_16pp gamma_16_from_1,
+ png_const_uint_16pp gamma_16_to_1, int gamma_shift
#endif
- )
+ )
{
png_bytep sp, dp;
png_uint_32 i;
- png_uint_32 row_width=row_info->width;
+ png_uint_32 row_width = row_info->width;
int shift;
png_debug(1, "in png_do_background");
*sp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff);
*sp |= (png_byte)(background->gray << shift);
}
+
if (!shift)
{
shift = 7;
sp++;
}
+
else
shift--;
}
*sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
*sp |= (png_byte)(background->gray << shift);
}
+
else
{
png_byte p = (png_byte)((*sp >> shift) & 0x03);
*sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
*sp |= (png_byte)(g << shift);
}
+
if (!shift)
{
shift = 6;
sp++;
}
+
else
shift -= 2;
}
}
+
else
#endif
{
*sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
*sp |= (png_byte)(background->gray << shift);
}
+
if (!shift)
{
shift = 6;
sp++;
}
+
else
shift -= 2;
}
*sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
*sp |= (png_byte)(background->gray << shift);
}
+
else
{
png_byte p = (png_byte)((*sp >> shift) & 0x0f);
png_byte g = (png_byte)((gamma_table[p |
- (p << 4)] >> 4) & 0x0f);
+ (p << 4)] >> 4) & 0x0f);
*sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
*sp |= (png_byte)(g << shift);
}
+
if (!shift)
{
shift = 4;
sp++;
}
+
else
shift -= 4;
}
}
+
else
#endif
{
*sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
*sp |= (png_byte)(background->gray << shift);
}
+
if (!shift)
{
shift = 4;
sp++;
}
+
else
shift -= 4;
}
for (i = 0; i < row_width; i++, sp++)
{
if (*sp == trans_color->gray)
- {
*sp = (png_byte)background->gray;
- }
+
else
- {
*sp = gamma_table[*sp];
- }
}
}
else
for (i = 0; i < row_width; i++, sp++)
{
if (*sp == trans_color->gray)
- {
*sp = (png_byte)background->gray;
- }
}
}
break;
png_uint_16 v;
v = (png_uint_16)(((*sp) << 8) + *(sp + 1));
+
if (v == trans_color->gray)
{
/* Background is already in screen gamma */
*sp = (png_byte)((background->gray >> 8) & 0xff);
*(sp + 1) = (png_byte)(background->gray & 0xff);
}
+
else
{
v = gamma_16[*(sp + 1) >> gamma_shift][*sp];
png_uint_16 v;
v = (png_uint_16)(((*sp) << 8) + *(sp + 1));
+
if (v == trans_color->gray)
{
*sp = (png_byte)((background->gray >> 8) & 0xff);
}
break;
}
+
+ default:
+ break;
}
break;
}
for (i = 0; i < row_width; i++, sp += 3)
{
if (*sp == trans_color->red &&
- *(sp + 1) == trans_color->green &&
- *(sp + 2) == trans_color->blue)
+ *(sp + 1) == trans_color->green &&
+ *(sp + 2) == trans_color->blue)
{
*sp = (png_byte)background->red;
*(sp + 1) = (png_byte)background->green;
*(sp + 2) = (png_byte)background->blue;
}
+
else
{
*sp = gamma_table[*sp];
for (i = 0; i < row_width; i++, sp += 3)
{
if (*sp == trans_color->red &&
- *(sp + 1) == trans_color->green &&
- *(sp + 2) == trans_color->blue)
+ *(sp + 1) == trans_color->green &&
+ *(sp + 2) == trans_color->blue)
{
*sp = (png_byte)background->red;
*(sp + 1) = (png_byte)background->green;
for (i = 0; i < row_width; i++, sp += 6)
{
png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1));
- png_uint_16 g = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3));
- png_uint_16 b = (png_uint_16)(((*(sp+4)) << 8) + *(sp+5));
+
+ png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8)
+ + *(sp + 3));
+
+ png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8)
+ + *(sp + 5));
+
if (r == trans_color->red && g == trans_color->green &&
- b == trans_color->blue)
+ b == trans_color->blue)
{
/* Background is already in screen gamma */
*sp = (png_byte)((background->red >> 8) & 0xff);
*(sp + 4) = (png_byte)((background->blue >> 8) & 0xff);
*(sp + 5) = (png_byte)(background->blue & 0xff);
}
+
else
{
png_uint_16 v = gamma_16[*(sp + 1) >> gamma_shift][*sp];
*sp = (png_byte)((v >> 8) & 0xff);
*(sp + 1) = (png_byte)(v & 0xff);
+
v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)];
*(sp + 2) = (png_byte)((v >> 8) & 0xff);
*(sp + 3) = (png_byte)(v & 0xff);
+
v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)];
*(sp + 4) = (png_byte)((v >> 8) & 0xff);
*(sp + 5) = (png_byte)(v & 0xff);
}
}
}
+
else
#endif
{
sp = row;
for (i = 0; i < row_width; i++, sp += 6)
{
- png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp+1));
- png_uint_16 g = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3));
- png_uint_16 b = (png_uint_16)(((*(sp+4)) << 8) + *(sp+5));
+ png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1));
+
+ png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8)
+ + *(sp + 3));
+
+ png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8)
+ + *(sp + 5));
if (r == trans_color->red && g == trans_color->green &&
- b == trans_color->blue)
+ b == trans_color->blue)
{
*sp = (png_byte)((background->red >> 8) & 0xff);
*(sp + 1) = (png_byte)(background->red & 0xff);
png_uint_16 a = *(sp + 1);
if (a == 0xff)
- {
*dp = gamma_table[*sp];
- }
+
else if (a == 0)
{
/* Background is already in screen gamma */
*dp = (png_byte)background->gray;
}
+
else
{
png_byte v, w;
png_byte a = *(sp + 1);
if (a == 0xff)
- {
*dp = *sp;
- }
+
#ifdef PNG_READ_GAMMA_SUPPORTED
else if (a == 0)
- {
*dp = (png_byte)background->gray;
- }
+
else
- {
png_composite(*dp, *sp, a, background_1->gray);
- }
+
#else
*dp = (png_byte)background->gray;
#endif
dp = row;
for (i = 0; i < row_width; i++, sp += 4, dp += 2)
{
- png_uint_16 a = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3));
+ png_uint_16 a = (png_uint_16)(((*(sp + 2)) << 8)
+ + *(sp + 3));
if (a == (png_uint_16)0xffff)
{
*dp = (png_byte)((v >> 8) & 0xff);
*(dp + 1) = (png_byte)(v & 0xff);
}
+
#ifdef PNG_READ_GAMMA_SUPPORTED
else if (a == 0)
#else
*dp = (png_byte)((background->gray >> 8) & 0xff);
*(dp + 1) = (png_byte)(background->gray & 0xff);
}
+
#ifdef PNG_READ_GAMMA_SUPPORTED
else
{
dp = row;
for (i = 0; i < row_width; i++, sp += 4, dp += 2)
{
- png_uint_16 a = (png_uint_16)(((*(sp+2)) << 8) + *(sp+3));
+ png_uint_16 a = (png_uint_16)(((*(sp + 2)) << 8)
+ + *(sp + 3));
+
if (a == (png_uint_16)0xffff)
- {
png_memcpy(dp, sp, 2);
- }
+
#ifdef PNG_READ_GAMMA_SUPPORTED
else if (a == 0)
#else
*dp = (png_byte)((background->gray >> 8) & 0xff);
*(dp + 1) = (png_byte)(background->gray & 0xff);
}
+
#ifdef PNG_READ_GAMMA_SUPPORTED
else
{
*(dp + 1) = gamma_table[*(sp + 1)];
*(dp + 2) = gamma_table[*(sp + 2)];
}
+
else if (a == 0)
{
/* Background is already in screen gamma */
*(dp + 1) = (png_byte)background->green;
*(dp + 2) = (png_byte)background->blue;
}
+
else
{
png_byte v, w;
v = gamma_to_1[*sp];
png_composite(w, v, a, background_1->red);
*dp = gamma_from_1[w];
+
v = gamma_to_1[*(sp + 1)];
png_composite(w, v, a, background_1->green);
*(dp + 1) = gamma_from_1[w];
+
v = gamma_to_1[*(sp + 2)];
png_composite(w, v, a, background_1->blue);
*(dp + 2) = gamma_from_1[w];
*(dp + 1) = *(sp + 1);
*(dp + 2) = *(sp + 2);
}
+
else if (a == 0)
{
*dp = (png_byte)background->red;
*(dp + 1) = (png_byte)background->green;
*(dp + 2) = (png_byte)background->blue;
}
+
else
{
png_composite(*dp, *sp, a, background->red);
+
png_composite(*(dp + 1), *(sp + 1), a,
- background->green);
+ background->green);
+
png_composite(*(dp + 2), *(sp + 2), a,
- background->blue);
+ background->blue);
}
}
}
{
png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6))
<< 8) + (png_uint_16)(*(sp + 7)));
+
if (a == (png_uint_16)0xffff)
{
png_uint_16 v;
v = gamma_16[*(sp + 1) >> gamma_shift][*sp];
*dp = (png_byte)((v >> 8) & 0xff);
*(dp + 1) = (png_byte)(v & 0xff);
+
v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)];
*(dp + 2) = (png_byte)((v >> 8) & 0xff);
*(dp + 3) = (png_byte)(v & 0xff);
+
v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)];
*(dp + 4) = (png_byte)((v >> 8) & 0xff);
*(dp + 5) = (png_byte)(v & 0xff);
}
+
else if (a == 0)
{
/* Background is already in screen gamma */
*(dp + 4) = (png_byte)((background->blue >> 8) & 0xff);
*(dp + 5) = (png_byte)(background->blue & 0xff);
}
+
else
{
png_uint_16 v, w, x;
v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp];
png_composite_16(w, v, a, background_1->red);
+
x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8];
*dp = (png_byte)((x >> 8) & 0xff);
*(dp + 1) = (png_byte)(x & 0xff);
+
v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)];
png_composite_16(w, v, a, background_1->green);
+
x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8];
*(dp + 2) = (png_byte)((x >> 8) & 0xff);
*(dp + 3) = (png_byte)(x & 0xff);
+
v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)];
png_composite_16(w, v, a, background_1->blue);
+
x = gamma_16_from_1[(w & 0xff) >> gamma_shift][w >> 8];
*(dp + 4) = (png_byte)((x >> 8) & 0xff);
*(dp + 5) = (png_byte)(x & 0xff);
}
}
}
+
else
#endif
{
for (i = 0; i < row_width; i++, sp += 8, dp += 6)
{
png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6))
- << 8) + (png_uint_16)(*(sp + 7)));
+ << 8) + (png_uint_16)(*(sp + 7)));
+
if (a == (png_uint_16)0xffff)
{
png_memcpy(dp, sp, 6);
}
+
else if (a == 0)
{
*dp = (png_byte)((background->red >> 8) & 0xff);
*(dp + 4) = (png_byte)((background->blue >> 8) & 0xff);
*(dp + 5) = (png_byte)(background->blue & 0xff);
}
+
else
{
png_uint_16 v;
png_composite_16(v, r, a, background->red);
*dp = (png_byte)((v >> 8) & 0xff);
*(dp + 1) = (png_byte)(v & 0xff);
+
png_composite_16(v, g, a, background->green);
*(dp + 2) = (png_byte)((v >> 8) & 0xff);
*(dp + 3) = (png_byte)(v & 0xff);
+
png_composite_16(v, b, a, background->blue);
*(dp + 4) = (png_byte)((v >> 8) & 0xff);
*(dp + 5) = (png_byte)(v & 0xff);
}
break;
}
+
+ default:
+ break;
}
if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
{
- row_info->color_type &= ~PNG_COLOR_MASK_ALPHA;
+ row_info->color_type = (png_byte)(row_info->color_type &
+ ~PNG_COLOR_MASK_ALPHA);
row_info->channels--;
row_info->pixel_depth = (png_byte)(row_info->channels *
- row_info->bit_depth);
+ row_info->bit_depth);
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
}
}
*/
void /* PRIVATE */
png_do_gamma(png_row_infop row_info, png_bytep row,
- png_bytep gamma_table, png_uint_16pp gamma_16_table,
- int gamma_shift)
+ png_const_bytep gamma_table, png_const_uint_16pp gamma_16_table,
+ int gamma_shift)
{
png_bytep sp;
png_uint_32 i;
png_debug(1, "in png_do_gamma");
- if (
- ((row_info->bit_depth <= 8 && gamma_table != NULL) ||
- (row_info->bit_depth == 16 && gamma_16_table != NULL)))
+ if (((row_info->bit_depth <= 8 && gamma_table != NULL) ||
+ (row_info->bit_depth == 16 && gamma_16_table != NULL)))
{
switch (row_info->color_type)
{
sp++;
}
}
+
else /* if (row_info->bit_depth == 16) */
{
sp = row;
*sp = (png_byte)((v >> 8) & 0xff);
*(sp + 1) = (png_byte)(v & 0xff);
sp += 2;
+
v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
*sp = (png_byte)((v >> 8) & 0xff);
*(sp + 1) = (png_byte)(v & 0xff);
sp += 2;
+
v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
*sp = (png_byte)((v >> 8) & 0xff);
*(sp + 1) = (png_byte)(v & 0xff);
{
*sp = gamma_table[*sp];
sp++;
+
*sp = gamma_table[*sp];
sp++;
+
*sp = gamma_table[*sp];
sp++;
+
sp++;
}
}
+
else /* if (row_info->bit_depth == 16) */
{
sp = row;
*sp = (png_byte)((v >> 8) & 0xff);
*(sp + 1) = (png_byte)(v & 0xff);
sp += 2;
+
v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
*sp = (png_byte)((v >> 8) & 0xff);
*(sp + 1) = (png_byte)(v & 0xff);
sp += 2;
+
v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp];
*sp = (png_byte)((v >> 8) & 0xff);
*(sp + 1) = (png_byte)(v & 0xff);
sp += 2;
}
}
+
else /* if (row_info->bit_depth == 16) */
{
sp = row;
}
break;
}
+
+ default:
+ break;
}
}
}
*/
void /* PRIVATE */
png_do_expand_palette(png_row_infop row_info, png_bytep row,
- png_colorp palette, png_bytep trans_alpha, int num_trans)
+ png_const_colorp palette, png_const_bytep trans_alpha, int num_trans)
{
int shift, value;
png_bytep sp, dp;
png_debug(1, "in png_do_expand_palette");
- if (
- row_info->color_type == PNG_COLOR_TYPE_PALETTE)
+ if (row_info->color_type == PNG_COLOR_TYPE_PALETTE)
{
if (row_info->bit_depth < 8)
{
{
if ((*sp >> shift) & 0x01)
*dp = 1;
+
else
*dp = 0;
+
if (shift == 7)
{
shift = 0;
sp--;
}
+
else
shift++;
shift = 0;
sp--;
}
+
else
shift += 2;
shift = 0;
sp--;
}
+
else
shift += 4;
}
break;
}
+
+ default:
+ break;
}
row_info->bit_depth = 8;
row_info->pixel_depth = 8;
row_info->rowbytes = row_width;
}
- switch (row_info->bit_depth)
+
+ if (row_info->bit_depth == 8)
{
- case 8:
{
if (trans_alpha != NULL)
{
{
if ((int)(*sp) >= num_trans)
*dp-- = 0xff;
+
else
*dp-- = trans_alpha[*sp];
+
*dp-- = palette[*sp].blue;
*dp-- = palette[*sp].green;
*dp-- = palette[*sp].red;
row_info->color_type = 6;
row_info->channels = 4;
}
+
else
{
sp = row + (png_size_t)row_width - 1;
row_info->color_type = 2;
row_info->channels = 3;
}
- break;
}
}
}
*/
void /* PRIVATE */
png_do_expand(png_row_infop row_info, png_bytep row,
- png_color_16p trans_value)
+ png_const_color_16p trans_value)
{
int shift, value;
png_bytep sp, dp;
{
case 1:
{
- gray = (png_uint_16)((gray&0x01)*0xff);
+ gray = (png_uint_16)((gray & 0x01) * 0xff);
sp = row + (png_size_t)((row_width - 1) >> 3);
dp = row + (png_size_t)row_width - 1;
shift = 7 - (int)((row_width + 7) & 0x07);
{
if ((*sp >> shift) & 0x01)
*dp = 0xff;
+
else
*dp = 0;
+
if (shift == 7)
{
shift = 0;
sp--;
}
+
else
shift++;
case 2:
{
- gray = (png_uint_16)((gray&0x03)*0x55);
+ gray = (png_uint_16)((gray & 0x03) * 0x55);
sp = row + (png_size_t)((row_width - 1) >> 2);
dp = row + (png_size_t)row_width - 1;
shift = (int)((3 - ((row_width + 3) & 0x03)) << 1);
shift = 0;
sp--;
}
+
else
shift += 2;
case 4:
{
- gray = (png_uint_16)((gray&0x0f)*0x11);
+ gray = (png_uint_16)((gray & 0x0f) * 0x11);
sp = row + (png_size_t)((row_width - 1) >> 1);
dp = row + (png_size_t)row_width - 1;
shift = (int)((1 - ((row_width + 1) & 0x01)) << 2);
shift = 0;
sp--;
}
+
else
shift = 4;
}
break;
}
+
+ default:
+ break;
}
row_info->bit_depth = 8;
gray = gray & 0xff;
sp = row + (png_size_t)row_width - 1;
dp = row + (png_size_t)(row_width << 1) - 1;
+
for (i = 0; i < row_width; i++)
{
if (*sp == gray)
*dp-- = 0;
+
else
*dp-- = 0xff;
+
*dp-- = *sp--;
}
}
else if (row_info->bit_depth == 16)
{
- png_byte gray_high = (gray >> 8) & 0xff;
- png_byte gray_low = gray & 0xff;
+ png_byte gray_high = (png_byte)((gray >> 8) & 0xff);
+ png_byte gray_low = (png_byte)(gray & 0xff);
sp = row + row_info->rowbytes - 1;
dp = row + (row_info->rowbytes << 1) - 1;
for (i = 0; i < row_width; i++)
*dp-- = 0;
*dp-- = 0;
}
+
else
{
*dp-- = 0xff;
*dp-- = 0xff;
}
+
*dp-- = *sp--;
*dp-- = *sp--;
}
{
if (row_info->bit_depth == 8)
{
- png_byte red = trans_value->red & 0xff;
- png_byte green = trans_value->green & 0xff;
- png_byte blue = trans_value->blue & 0xff;
+ png_byte red = (png_byte)(trans_value->red & 0xff);
+ png_byte green = (png_byte)(trans_value->green & 0xff);
+ png_byte blue = (png_byte)(trans_value->blue & 0xff);
sp = row + (png_size_t)row_info->rowbytes - 1;
dp = row + (png_size_t)(row_width << 2) - 1;
for (i = 0; i < row_width; i++)
{
if (*(sp - 2) == red && *(sp - 1) == green && *(sp) == blue)
*dp-- = 0;
+
else
*dp-- = 0xff;
+
*dp-- = *sp--;
*dp-- = *sp--;
*dp-- = *sp--;
}
else if (row_info->bit_depth == 16)
{
- png_byte red_high = (trans_value->red >> 8) & 0xff;
- png_byte green_high = (trans_value->green >> 8) & 0xff;
- png_byte blue_high = (trans_value->blue >> 8) & 0xff;
- png_byte red_low = trans_value->red & 0xff;
- png_byte green_low = trans_value->green & 0xff;
- png_byte blue_low = trans_value->blue & 0xff;
+ png_byte red_high = (png_byte)((trans_value->red >> 8) & 0xff);
+ png_byte green_high = (png_byte)((trans_value->green >> 8) & 0xff);
+ png_byte blue_high = (png_byte)((trans_value->blue >> 8) & 0xff);
+ png_byte red_low = (png_byte)(trans_value->red & 0xff);
+ png_byte green_low = (png_byte)(trans_value->green & 0xff);
+ png_byte blue_low = (png_byte)(trans_value->blue & 0xff);
sp = row + row_info->rowbytes - 1;
dp = row + (png_size_t)(row_width << 3) - 1;
for (i = 0; i < row_width; i++)
{
if (*(sp - 5) == red_high &&
- *(sp - 4) == red_low &&
- *(sp - 3) == green_high &&
- *(sp - 2) == green_low &&
- *(sp - 1) == blue_high &&
- *(sp ) == blue_low)
+ *(sp - 4) == red_low &&
+ *(sp - 3) == green_high &&
+ *(sp - 2) == green_low &&
+ *(sp - 1) == blue_high &&
+ *(sp ) == blue_low)
{
*dp-- = 0;
*dp-- = 0;
}
+
else
{
*dp-- = 0xff;
*dp-- = 0xff;
}
+
*dp-- = *sp--;
*dp-- = *sp--;
*dp-- = *sp--;
}
#endif
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+/* If the bit depth is 8 and the colour type is not a palette type expand the
+ * whole row to 16 bits. Has no effect otherwise.
+ */
+void /* PRIVATE */
+png_do_expand_16(png_row_infop row_info, png_bytep row)
+{
+ if (row_info->bit_depth == 8 &&
+ row_info->color_type != PNG_COLOR_TYPE_PALETTE)
+ {
+ /* The row have a sequence of bytes containing [0..255] and we need
+ * to turn it into another row containing [0..65535], to do this we
+ * calculate:
+ *
+ * (input / 255) * 65535
+ *
+ * Which happens to be exactly input * 257 and this can be achieved
+ * simply by byte replication in place (copying backwards).
+ */
+ png_byte *sp = row + row_info->rowbytes; /* source, last byte + 1 */
+ png_byte *dp = sp + row_info->rowbytes; /* destination, end + 1 */
+ while (dp > sp)
+ dp[-2] = dp[-1] = *--sp, dp -= 2;
+
+ row_info->rowbytes *= 2;
+ row_info->bit_depth = 16;
+ row_info->pixel_depth = (png_byte)(row_info->channels * 16);
+ }
+}
+#endif
+
#ifdef PNG_READ_QUANTIZE_SUPPORTED
void /* PRIVATE */
png_do_quantize(png_row_infop row_info, png_bytep row,
- png_bytep palette_lookup, png_bytep quantize_lookup)
+ png_const_bytep palette_lookup, png_const_bytep quantize_lookup)
{
png_bytep sp, dp;
png_uint_32 i;
png_debug(1, "in png_do_quantize");
+ if (row_info->bit_depth == 8)
{
- if (row_info->color_type == PNG_COLOR_TYPE_RGB &&
- palette_lookup && row_info->bit_depth == 8)
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB && palette_lookup)
{
int r, g, b, p;
sp = row;
* ((b >> 3) & 0x1f);
*/
p = (((r >> (8 - PNG_QUANTIZE_RED_BITS)) &
- ((1 << PNG_QUANTIZE_RED_BITS) - 1)) <<
- (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) |
- (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) &
- ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) <<
- (PNG_QUANTIZE_BLUE_BITS)) |
- ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) &
- ((1 << PNG_QUANTIZE_BLUE_BITS) - 1));
+ ((1 << PNG_QUANTIZE_RED_BITS) - 1)) <<
+ (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) |
+ (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) &
+ ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) <<
+ (PNG_QUANTIZE_BLUE_BITS)) |
+ ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) &
+ ((1 << PNG_QUANTIZE_BLUE_BITS) - 1));
*dp++ = palette_lookup[p];
}
+
row_info->color_type = PNG_COLOR_TYPE_PALETTE;
row_info->channels = 1;
row_info->pixel_depth = row_info->bit_depth;
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
}
+
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
- palette_lookup != NULL && row_info->bit_depth == 8)
+ palette_lookup != NULL)
{
int r, g, b, p;
sp = row;
sp++;
p = (((r >> (8 - PNG_QUANTIZE_RED_BITS)) &
- ((1 << PNG_QUANTIZE_RED_BITS) - 1)) <<
- (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) |
- (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) &
- ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) <<
- (PNG_QUANTIZE_BLUE_BITS)) |
- ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) &
- ((1 << PNG_QUANTIZE_BLUE_BITS) - 1));
+ ((1 << PNG_QUANTIZE_RED_BITS) - 1)) <<
+ (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) |
+ (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) &
+ ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) <<
+ (PNG_QUANTIZE_BLUE_BITS)) |
+ ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) &
+ ((1 << PNG_QUANTIZE_BLUE_BITS) - 1));
*dp++ = palette_lookup[p];
}
+
row_info->color_type = PNG_COLOR_TYPE_PALETTE;
row_info->channels = 1;
row_info->pixel_depth = row_info->bit_depth;
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width);
}
+
else if (row_info->color_type == PNG_COLOR_TYPE_PALETTE &&
- quantize_lookup && row_info->bit_depth == 8)
+ quantize_lookup)
{
sp = row;
+
for (i = 0; i < row_width; i++, sp++)
{
*sp = quantize_lookup[*sp];
}
}
}
-#endif
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-#ifdef PNG_READ_GAMMA_SUPPORTED
-static PNG_CONST int png_gamma_shift[] =
- {0x10, 0x21, 0x42, 0x84, 0x110, 0x248, 0x550, 0xff0, 0x00};
-
-/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit
- * tables, we don't make a full table if we are reducing to 8-bit in
- * the future. Note also how the gamma_16 tables are segmented so that
- * we don't need to allocate > 64K chunks for a full 16-bit table.
- *
- * See the PNG extensions document for an integer algorithm for creating
- * the gamma tables. Maybe we will implement that here someday.
- *
- * We should only reach this point if
- *
- * the file_gamma is known (i.e., the gAMA or sRGB chunk is present,
- * or the application has provided a file_gamma)
- *
- * AND
- * {
- * the screen_gamma is known
- *
- * OR
- *
- * RGB_to_gray transformation is being performed
- * }
- *
- * AND
- * {
- * the screen_gamma is different from the reciprocal of the
- * file_gamma by more than the specified threshold
- *
- * OR
- *
- * a background color has been specified and the file_gamma
- * and screen_gamma are not 1.0, within the specified threshold.
- * }
- */
-
-void /* PRIVATE */
-png_build_gamma_table(png_structp png_ptr, png_byte bit_depth)
-{
- png_debug(1, "in png_build_gamma_table");
-
- if (bit_depth <= 8)
- {
- int i;
- double g;
-
- if (png_ptr->screen_gamma > .000001)
- g = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma);
-
- else
- g = 1.0;
-
- png_ptr->gamma_table = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)256);
-
- for (i = 0; i < 256; i++)
- {
- png_ptr->gamma_table[i] = (png_byte)(pow((double)i / 255.0,
- g) * 255.0 + .5);
- }
-
-#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
- defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
- if (png_ptr->transformations & ((PNG_BACKGROUND) | PNG_RGB_TO_GRAY))
- {
-
- g = 1.0 / (png_ptr->gamma);
-
- png_ptr->gamma_to_1 = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)256);
-
- for (i = 0; i < 256; i++)
- {
- png_ptr->gamma_to_1[i] = (png_byte)(pow((double)i / 255.0,
- g) * 255.0 + .5);
- }
-
-
- png_ptr->gamma_from_1 = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)256);
-
- if (png_ptr->screen_gamma > 0.000001)
- g = 1.0 / png_ptr->screen_gamma;
-
- else
- g = png_ptr->gamma; /* Probably doing rgb_to_gray */
-
- for (i = 0; i < 256; i++)
- {
- png_ptr->gamma_from_1[i] = (png_byte)(pow((double)i / 255.0,
- g) * 255.0 + .5);
-
- }
- }
-#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */
- }
- else
- {
- double g;
- int i, j, shift, num;
- int sig_bit;
- png_uint_32 ig;
-
- if (png_ptr->color_type & PNG_COLOR_MASK_COLOR)
- {
- sig_bit = (int)png_ptr->sig_bit.red;
-
- if ((int)png_ptr->sig_bit.green > sig_bit)
- sig_bit = png_ptr->sig_bit.green;
-
- if ((int)png_ptr->sig_bit.blue > sig_bit)
- sig_bit = png_ptr->sig_bit.blue;
- }
- else
- {
- sig_bit = (int)png_ptr->sig_bit.gray;
- }
-
- if (sig_bit > 0)
- shift = 16 - sig_bit;
-
- else
- shift = 0;
-
- if (png_ptr->transformations & PNG_16_TO_8)
- {
- if (shift < (16 - PNG_MAX_GAMMA_8))
- shift = (16 - PNG_MAX_GAMMA_8);
- }
-
- if (shift > 8)
- shift = 8;
-
- if (shift < 0)
- shift = 0;
-
- png_ptr->gamma_shift = (png_byte)shift;
-
- num = (1 << (8 - shift));
-
- if (png_ptr->screen_gamma > .000001)
- g = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma);
- else
- g = 1.0;
-
- png_ptr->gamma_16_table = (png_uint_16pp)png_calloc(png_ptr,
- (png_uint_32)(num * png_sizeof(png_uint_16p)));
-
- if (png_ptr->transformations & (PNG_16_TO_8 | PNG_BACKGROUND))
- {
- double fin, fout;
- png_uint_32 last, max;
-
- for (i = 0; i < num; i++)
- {
- png_ptr->gamma_16_table[i] = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(256 * png_sizeof(png_uint_16)));
- }
-
- g = 1.0 / g;
- last = 0;
- for (i = 0; i < 256; i++)
- {
- fout = ((double)i + 0.5) / 256.0;
- fin = pow(fout, g);
- max = (png_uint_32)(fin * (double)((png_uint_32)num << 8));
- while (last <= max)
- {
- png_ptr->gamma_16_table[(int)(last & (0xff >> shift))]
- [(int)(last >> (8 - shift))] = (png_uint_16)(
- (png_uint_16)i | ((png_uint_16)i << 8));
- last++;
- }
- }
- while (last < ((png_uint_32)num << 8))
- {
- png_ptr->gamma_16_table[(int)(last & (0xff >> shift))]
- [(int)(last >> (8 - shift))] = (png_uint_16)65535L;
- last++;
- }
- }
- else
- {
- for (i = 0; i < num; i++)
- {
- png_ptr->gamma_16_table[i] = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(256 * png_sizeof(png_uint_16)));
-
- ig = (((png_uint_32)i * (png_uint_32)png_gamma_shift[shift]) >> 4);
-
- for (j = 0; j < 256; j++)
- {
- png_ptr->gamma_16_table[i][j] =
- (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) /
- 65535.0, g) * 65535.0 + .5);
- }
- }
- }
-
-#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
- defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
- if (png_ptr->transformations & (PNG_BACKGROUND | PNG_RGB_TO_GRAY))
- {
-
- g = 1.0 / (png_ptr->gamma);
-
- png_ptr->gamma_16_to_1 = (png_uint_16pp)png_calloc(png_ptr,
- (png_uint_32)(num * png_sizeof(png_uint_16p )));
-
- for (i = 0; i < num; i++)
- {
- png_ptr->gamma_16_to_1[i] = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(256 * png_sizeof(png_uint_16)));
-
- ig = (((png_uint_32)i *
- (png_uint_32)png_gamma_shift[shift]) >> 4);
- for (j = 0; j < 256; j++)
- {
- png_ptr->gamma_16_to_1[i][j] =
- (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) /
- 65535.0, g) * 65535.0 + .5);
- }
- }
-
- if (png_ptr->screen_gamma > 0.000001)
- g = 1.0 / png_ptr->screen_gamma;
-
- else
- g = png_ptr->gamma; /* Probably doing rgb_to_gray */
-
- png_ptr->gamma_16_from_1 = (png_uint_16pp)png_calloc(png_ptr,
- (png_uint_32)(num * png_sizeof(png_uint_16p)));
-
- for (i = 0; i < num; i++)
- {
- png_ptr->gamma_16_from_1[i] = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(256 * png_sizeof(png_uint_16)));
-
- ig = (((png_uint_32)i *
- (png_uint_32)png_gamma_shift[shift]) >> 4);
-
- for (j = 0; j < 256; j++)
- {
- png_ptr->gamma_16_from_1[i][j] =
- (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) /
- 65535.0, g) * 65535.0 + .5);
- }
- }
- }
-#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_RGB_TO_GRAY_SUPPORTED */
- }
-}
-#endif
-/* To do: install integer version of png_build_gamma_table here */
-#endif
+#endif /* PNG_READ_QUANTIZE_SUPPORTED */
#ifdef PNG_MNG_FEATURES_SUPPORTED
/* Undoes intrapixel differencing */
{
int bytes_per_pixel;
png_uint_32 row_width = row_info->width;
+
if (row_info->bit_depth == 8)
{
png_bytep rp;
for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
{
- *(rp) = (png_byte)((256 + *rp + *(rp+1))&0xff);
- *(rp+2) = (png_byte)((256 + *(rp+2) + *(rp+1))&0xff);
+ *(rp) = (png_byte)((256 + *rp + *(rp + 1)) & 0xff);
+ *(rp+2) = (png_byte)((256 + *(rp + 2) + *(rp + 1)) & 0xff);
}
}
else if (row_info->bit_depth == 16)
png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5);
png_uint_32 red = (png_uint_32)((s0 + s1 + 65536L) & 0xffffL);
png_uint_32 blue = (png_uint_32)((s2 + s1 + 65536L) & 0xffffL);
- *(rp ) = (png_byte)((red >> 8) & 0xff);
- *(rp+1) = (png_byte)(red & 0xff);
- *(rp+4) = (png_byte)((blue >> 8) & 0xff);
- *(rp+5) = (png_byte)(blue & 0xff);
+ *(rp ) = (png_byte)((red >> 8) & 0xff);
+ *(rp + 1) = (png_byte)(red & 0xff);
+ *(rp + 4) = (png_byte)((blue >> 8) & 0xff);
+ *(rp + 5) = (png_byte)(blue & 0xff);
}
}
}
/* pngrutil.c - utilities to read a PNG file
*
- * Last changed in libpng 1.4.4 [August 26, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* libpng itself during the course of reading an image.
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#ifdef PNG_READ_SUPPORTED
#include "pngpriv.h"
-# define png_strtod(p,a,b) strtod(a,b)
+#ifdef PNG_READ_SUPPORTED
+
+#define png_strtod(p,a,b) strtod(a,b)
+
png_uint_32 PNGAPI
-png_get_uint_31(png_structp png_ptr, png_bytep buf)
+png_get_uint_31(png_structp png_ptr, png_const_bytep buf)
+{
+ png_uint_32 uval = png_get_uint_32(buf);
+
+ if (uval > PNG_UINT_31_MAX)
+ png_error(png_ptr, "PNG unsigned integer out of range");
+
+ return (uval);
+}
+
+#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_READ_cHRM_SUPPORTED)
+/* The following is a variation on the above for use with the fixed
+ * point values used for gAMA and cHRM. Instead of png_error it
+ * issues a warning and returns (-1) - an invalid value because both
+ * gAMA and cHRM use *unsigned* integers for fixed point values.
+ */
+#define PNG_FIXED_ERROR (-1)
+
+static png_fixed_point /* PRIVATE */
+png_get_fixed_point(png_structp png_ptr, png_const_bytep buf)
{
- png_uint_32 i = png_get_uint_32(buf);
- if (i > PNG_UINT_31_MAX)
- png_error(png_ptr, "PNG unsigned integer out of range");
- return (i);
+ png_uint_32 uval = png_get_uint_32(buf);
+
+ if (uval <= PNG_UINT_31_MAX)
+ return (png_fixed_point)uval; /* known to be in range */
+
+ /* The caller can turn off the warning by passing NULL. */
+ if (png_ptr != NULL)
+ png_warning(png_ptr, "PNG fixed point integer out of range");
+
+ return PNG_FIXED_ERROR;
}
-#ifndef PNG_USE_READ_MACROS
+#endif
+
+#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED
+/* NOTE: the read macros will obscure these definitions, so that if
+ * PNG_USE_READ_MACROS is set the library will not use them internally,
+ * but the APIs will still be available externally.
+ *
+ * The parentheses around "PNGAPI function_name" in the following three
+ * functions are necessary because they allow the macros to co-exist with
+ * these (unused but exported) functions.
+ */
+
/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */
png_uint_32 (PNGAPI
-png_get_uint_32)(png_bytep buf)
+png_get_uint_32)(png_const_bytep buf)
{
- png_uint_32 i =
+ png_uint_32 uval =
((png_uint_32)(*(buf )) << 24) +
((png_uint_32)(*(buf + 1)) << 16) +
((png_uint_32)(*(buf + 2)) << 8) +
((png_uint_32)(*(buf + 3)) ) ;
- return (i);
+ return uval;
}
/* Grab a signed 32-bit integer from a buffer in big-endian format. The
* the following code does a two's complement to native conversion.
*/
png_int_32 (PNGAPI
-png_get_int_32)(png_bytep buf)
+png_get_int_32)(png_const_bytep buf)
{
- png_uint_32 u = png_get_uint_32(buf);
- if ((u & 0x80000000) == 0) /* non-negative */
- return u;
+ png_uint_32 uval = png_get_uint_32(buf);
+ if ((uval & 0x80000000L) == 0) /* non-negative */
+ return uval;
- u = (u ^ 0xffffffff) + 1; /* 2's complement: -x = ~x+1 */
- return -(png_int_32)u;
+ uval = (uval ^ 0xffffffffL) + 1; /* 2's complement: -x = ~x+1 */
+ return -(png_int_32)uval;
}
/* Grab an unsigned 16-bit integer from a buffer in big-endian format. */
png_uint_16 (PNGAPI
-png_get_uint_16)(png_bytep buf)
+png_get_uint_16)(png_const_bytep buf)
{
- png_uint_16 i =
- ((png_uint_32)(*buf) << 8) +
- ((png_uint_32)(*(buf + 1)));
+ /* ANSI-C requires an int value to accomodate at least 16 bits so this
+ * works and allows the compiler not to worry about possible narrowing
+ * on 32 bit systems. (Pre-ANSI systems did not make integers smaller
+ * than 16 bits either.)
+ */
+ unsigned int val =
+ ((unsigned int)(*buf) << 8) +
+ ((unsigned int)(*(buf + 1)));
- return (i);
+ return (png_uint_16)val;
+}
+
+#endif /* PNG_READ_INT_FUNCTIONS_SUPPORTED */
+
+/* Read and check the PNG file signature */
+void /* PRIVATE */
+png_read_sig(png_structp png_ptr, png_infop info_ptr)
+{
+ png_size_t num_checked, num_to_check;
+
+ /* Exit if the user application does not expect a signature. */
+ if (png_ptr->sig_bytes >= 8)
+ return;
+
+ num_checked = png_ptr->sig_bytes;
+ num_to_check = 8 - num_checked;
+
+#ifdef PNG_IO_STATE_SUPPORTED
+ png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE;
+#endif
+
+ /* The signature must be serialized in a single I/O call. */
+ png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check);
+ png_ptr->sig_bytes = 8;
+
+ if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
+ {
+ if (num_checked < 4 &&
+ png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
+ png_error(png_ptr, "Not a PNG file");
+ else
+ png_error(png_ptr, "PNG file corrupted by ASCII conversion");
+ }
+ if (num_checked < 3)
+ png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
}
-#endif /* PNG_USE_READ_MACROS */
/* Read the chunk header (length + type name).
* Put the type name into png_ptr->chunk_name, and return the length.
png_uint_32 length;
#ifdef PNG_IO_STATE_SUPPORTED
- /* Inform the I/O callback that the chunk header is being read.
- * PNG_IO_CHUNK_HDR requires a single I/O call.
- */
png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_HDR;
#endif
- /* Read the length and the chunk name */
+ /* Read the length and the chunk name.
+ * This must be performed in a single I/O call.
+ */
png_read_data(png_ptr, buf, 8);
length = png_get_uint_31(png_ptr, buf);
- /* Put the chunk name into png_ptr->chunk_name */
+ /* Put the chunk name into png_ptr->chunk_name. */
png_memcpy(png_ptr->chunk_name, buf + 4, 4);
- png_debug2(0, "Reading %s chunk, length = %lu",
- png_ptr->chunk_name, length);
+ png_debug2(0, "Reading %s chunk, length = %u",
+ png_ptr->chunk_name, length);
- /* Reset the crc and run it over the chunk name */
+ /* Reset the crc and run it over the chunk name. */
png_reset_crc(png_ptr);
png_calculate_crc(png_ptr, png_ptr->chunk_name, 4);
- /* Check to see if chunk name is valid */
+ /* Check to see if chunk name is valid. */
png_check_chunk_name(png_ptr, png_ptr->chunk_name);
#ifdef PNG_IO_STATE_SUPPORTED
- /* Inform the I/O callback that chunk data will (possibly) be read.
- * PNG_IO_CHUNK_DATA does NOT require a specific number of I/O calls.
- */
png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_DATA;
#endif
{
if (png_ptr == NULL)
return;
+
png_read_data(png_ptr, buf, length);
png_calculate_crc(png_ptr, buf, length);
}
{
png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
}
+
if (i)
{
png_crc_read(png_ptr, png_ptr->zbuf, i);
{
png_chunk_warning(png_ptr, "CRC error");
}
+
else
{
png_chunk_benign_error(png_ptr, "CRC error");
return (0);
}
+
return (1);
}
(PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
need_crc = 0;
}
+
else /* critical */
{
if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
}
#ifdef PNG_IO_STATE_SUPPORTED
- /* Inform the I/O callback that the chunk CRC is being read */
- /* PNG_IO_CHUNK_CRC requires the I/O to be done at once */
png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_CRC;
#endif
+ /* The chunk CRC must be serialized in a single I/O call. */
png_read_data(png_ptr, crc_bytes, 4);
if (need_crc)
crc = png_get_uint_32(crc_bytes);
return ((int)(crc != png_ptr->crc));
}
+
else
return (0);
}
#if defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) || \
defined(PNG_READ_iCCP_SUPPORTED)
static png_size_t
-png_inflate(png_structp png_ptr, const png_byte *data, png_size_t size,
- png_bytep output, png_size_t output_size)
+png_inflate(png_structp png_ptr, png_bytep data, png_size_t size,
+ png_bytep output, png_size_t output_size)
{
png_size_t count = 0;
- png_ptr->zstream.next_in = (png_bytep)data; /* const_cast: VALID */
- png_ptr->zstream.avail_in = size;
+ /* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't
+ * even necessarily handle 65536 bytes) because the type uInt is "16 bits or
+ * more". Consequently it is necessary to chunk the input to zlib. This
+ * code uses ZLIB_IO_MAX, from pngpriv.h, as the maximum (the maximum value
+ * that can be stored in a uInt.) It is possible to set ZLIB_IO_MAX to a
+ * lower value in pngpriv.h and this may sometimes have a performance
+ * advantage, because it forces access of the input data to be separated from
+ * at least some of the use by some period of time.
+ */
+ png_ptr->zstream.next_in = data;
+ /* avail_in is set below from 'size' */
+ png_ptr->zstream.avail_in = 0;
while (1)
{
int ret, avail;
+ /* The setting of 'avail_in' used to be outside the loop, by setting it
+ * inside it is possible to chunk the input to zlib and simply rely on
+ * zlib to advance the 'next_in' pointer. This allows arbitrary amounts o
+ * data to be passed through zlib at the unavoidable cost of requiring a
+ * window save (memcpy of up to 32768 output bytes) every ZLIB_IO_MAX
+ * input bytes.
+ */
+ if (png_ptr->zstream.avail_in == 0 && size > 0)
+ {
+ if (size <= ZLIB_IO_MAX)
+ {
+ /* The value is less than ZLIB_IO_MAX so the cast is safe: */
+ png_ptr->zstream.avail_in = (uInt)size;
+ size = 0;
+ }
+
+ else
+ {
+ png_ptr->zstream.avail_in = ZLIB_IO_MAX;
+ size -= ZLIB_IO_MAX;
+ }
+ }
+
/* Reset the output buffer each time round - we empty it
* after every inflate call.
*/
*/
if ((ret == Z_OK || ret == Z_STREAM_END) && avail > 0)
{
+ png_size_t space = avail; /* > 0, see above */
+
if (output != 0 && output_size > count)
{
- int copy = output_size - count;
- if (avail < copy) copy = avail;
+ png_size_t copy = output_size - count;
+
+ if (space < copy)
+ copy = space;
+
png_memcpy(output + count, png_ptr->zbuf, copy);
}
- count += avail;
+ count += space;
}
if (ret == Z_OK)
*/
{
PNG_CONST char *msg;
+#ifdef PNG_CONSOLE_IO_SUPPORTED
+ char umsg[52];
+#endif
if (png_ptr->zstream.msg != 0)
msg = png_ptr->zstream.msg;
+
else
{
-#ifdef PNG_STDIO_SUPPORTED
- char umsg[52];
-
+#ifdef PNG_CONSOLE_IO_SUPPORTED
switch (ret)
{
case Z_BUF_ERROR:
msg = "Buffer error in compressed datastream in %s chunk";
break;
+
case Z_DATA_ERROR:
msg = "Data error in compressed datastream in %s chunk";
break;
+
default:
msg = "Incomplete compressed datastream in %s chunk";
break;
png_warning(png_ptr, msg);
}
- /* 0 means an error - notice that this code simple ignores
+ /* 0 means an error - notice that this code simply ignores
* zero length compressed chunks as a result.
*/
return 0;
else if (comp_type == PNG_COMPRESSION_TYPE_BASE)
{
png_size_t expanded_size = png_inflate(png_ptr,
- (png_bytep)(png_ptr->chunkdata + prefix_size),
- chunklength - prefix_size,
- 0/*output*/, 0/*output size*/);
+ (png_bytep)(png_ptr->chunkdata + prefix_size),
+ chunklength - prefix_size,
+ 0, /*output*/
+ 0); /*output size*/
/* Now check the limits on this chunk - if the limit fails the
* compressed data will be removed, the prefix will remain.
*/
#if defined(PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED) || \
defined(PNG_USER_CHUNK_MALLOC_MAX)
- else
-#endif
+ else if (expanded_size > 0)
+#else
if (expanded_size > 0)
+#endif
{
/* Success (maybe) - really uncompress the chunk. */
png_size_t new_size = 0;
png_charp text = png_malloc_warn(png_ptr,
- prefix_size + expanded_size + 1);
+ prefix_size + expanded_size + 1);
if (text != NULL)
{
png_warning(png_ptr, "png_inflate logic error");
png_free(png_ptr, text);
}
+
else
- png_warning(png_ptr, "Not enough memory to decompress chunk");
+ png_warning(png_ptr, "Not enough memory to decompress chunk");
}
}
#ifdef PNG_STDIO_SUPPORTED
char umsg[50];
- png_snprintf(umsg, sizeof umsg, "Unknown zTXt compression type %d",
- comp_type);
+ png_snprintf(umsg, sizeof umsg,
+ "Unknown zTXt compression type %d", comp_type);
png_warning(png_ptr, umsg);
#else
png_warning(png_ptr, "Unknown zTXt compression type");
*/
{
png_charp text = png_malloc_warn(png_ptr, prefix_size + 1);
+
if (text != NULL)
{
if (prefix_size > 0)
png_memcpy(text, png_ptr->chunkdata, prefix_size);
+
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = text;
/* Find number of channels */
switch (png_ptr->color_type)
{
+ default: /* invalid, png_set_IHDR calls png_error */
case PNG_COLOR_TYPE_GRAY:
case PNG_COLOR_TYPE_PALETTE:
png_ptr->channels = 1;
png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->width);
png_debug1(3, "bit_depth = %d", png_ptr->bit_depth);
png_debug1(3, "channels = %d", png_ptr->channels);
- png_debug1(3, "rowbytes = %lu", png_ptr->rowbytes);
+ png_debug1(3, "rowbytes = %lu", (unsigned long)png_ptr->rowbytes);
png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth,
- color_type, interlace_type, compression_type, filter_type);
+ color_type, interlace_type, compression_type, filter_type);
}
/* Read and check the palette */
if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
{
png_warning(png_ptr,
- "Ignoring PLTE chunk in grayscale PNG");
+ "Ignoring PLTE chunk in grayscale PNG");
png_crc_finish(png_ptr, length);
return;
}
+
#ifndef PNG_READ_OPT_PLTE_SUPPORTED
if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)
{
}
#endif
- /* If we actually NEED the PLTE chunk (ie for a paletted image), we do
+ /* If we actually need the PLTE chunk (ie for a paletted image), we do
* whatever the normal CRC configuration tells us. However, if we
* have an RGB image, the PLTE can be considered ancillary, so
* we will act as though it is.
{
png_crc_finish(png_ptr, 0);
}
+
#ifndef PNG_READ_OPT_PLTE_SUPPORTED
else if (png_crc_error(png_ptr)) /* Only if we have a CRC error */
{
/* If we don't want to use the data from an ancillary chunk,
- we have two options: an error abort, or a warning and we
- ignore the data in this chunk (which should be OK, since
- it's considered ancillary for a RGB or RGBA image). */
+ * we have two options: an error abort, or a warning and we
+ * ignore the data in this chunk (which should be OK, since
+ * it's considered ancillary for a RGB or RGBA image).
+ */
if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_USE))
{
if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)
{
png_chunk_benign_error(png_ptr, "CRC error");
}
+
else
{
png_chunk_warning(png_ptr, "CRC error");
return;
}
}
+
/* Otherwise, we (optionally) emit a warning and use the chunk. */
else if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN))
{
png_warning(png_ptr, "Truncating incorrect tRNS chunk length");
png_ptr->num_trans = (png_uint_16)num;
}
+
if (info_ptr->num_trans > (png_uint_16)num)
{
png_warning(png_ptr, "Truncating incorrect info tRNS chunk length");
{
png_warning(png_ptr, "Incorrect IEND chunk length");
}
+
png_crc_finish(png_ptr, length);
- info_ptr = info_ptr; /* Quiet compiler warnings about unused info_ptr */
+ PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */
}
#ifdef PNG_READ_gAMA_SUPPORTED
png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
png_fixed_point igamma;
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- float file_gamma;
-#endif
png_byte buf[4];
png_debug(1, "in png_handle_gAMA");
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before gAMA");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid gAMA after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (png_ptr->mode & PNG_HAVE_PLTE)
/* Should be an error, but we can cope with it */
png_warning(png_ptr, "Out of place gAMA chunk");
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
#ifdef PNG_READ_sRGB_SUPPORTED
- && !(info_ptr->valid & PNG_INFO_sRGB)
+ && !(info_ptr->valid & PNG_INFO_sRGB)
#endif
- )
+ )
{
png_warning(png_ptr, "Duplicate gAMA chunk");
png_crc_finish(png_ptr, length);
}
png_crc_read(png_ptr, buf, 4);
+
if (png_crc_finish(png_ptr, 0))
return;
- igamma = (png_fixed_point)png_get_uint_32(buf);
- /* Check for zero gamma */
- if (igamma == 0)
- {
- png_warning(png_ptr,
- "Ignoring gAMA chunk with gamma=0");
- return;
- }
+ igamma = png_get_fixed_point(NULL, buf);
-#ifdef PNG_READ_sRGB_SUPPORTED
+ /* Check for zero gamma or an error. */
+ if (igamma <= 0)
+ {
+ png_warning(png_ptr,
+ "Ignoring gAMA chunk with out of range gamma");
+
+ return;
+ }
+
+# ifdef PNG_READ_sRGB_SUPPORTED
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB))
+ {
if (PNG_OUT_OF_RANGE(igamma, 45500L, 500))
{
png_warning(png_ptr,
- "Ignoring incorrect gAMA value when sRGB is also present");
-#ifdef PNG_CONSOLE_IO_SUPPORTED
+ "Ignoring incorrect gAMA value when sRGB is also present");
+
+# ifdef PNG_CONSOLE_IO_SUPPORTED
fprintf(stderr, "gamma = (%d/100000)", (int)igamma);
-#endif
+# endif
return;
}
-#endif /* PNG_READ_sRGB_SUPPORTED */
+ }
+# endif /* PNG_READ_sRGB_SUPPORTED */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- file_gamma = (float)igamma / (float)100000.0;
# ifdef PNG_READ_GAMMA_SUPPORTED
- png_ptr->gamma = file_gamma;
+ /* Gamma correction on read is supported. */
+ png_ptr->gamma = igamma;
# endif
- png_set_gAMA(png_ptr, info_ptr, file_gamma);
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
+ /* And set the 'info' structure members. */
png_set_gAMA_fixed(png_ptr, info_ptr, igamma);
-#endif
}
#endif
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before sBIT");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid sBIT after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (png_ptr->mode & PNG_HAVE_PLTE)
{
/* Should be an error, but we can cope with it */
png_warning(png_ptr, "Out of place sBIT chunk");
}
+
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT))
{
png_warning(png_ptr, "Duplicate sBIT chunk");
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
truelen = 3;
+
else
truelen = (png_size_t)png_ptr->channels;
}
png_crc_read(png_ptr, buf, truelen);
+
if (png_crc_finish(png_ptr, 0))
return;
png_ptr->sig_bit.blue = buf[2];
png_ptr->sig_bit.alpha = buf[3];
}
+
else
{
png_ptr->sig_bit.gray = buf[0];
png_ptr->sig_bit.blue = buf[0];
png_ptr->sig_bit.alpha = buf[1];
}
+
png_set_sBIT(png_ptr, info_ptr, &(png_ptr->sig_bit));
}
#endif
png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
png_byte buf[32];
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
-#endif
- png_fixed_point int_x_white, int_y_white, int_x_red, int_y_red, int_x_green,
- int_y_green, int_x_blue, int_y_blue;
-
- png_uint_32 uint_x, uint_y;
+ png_fixed_point x_white, y_white, x_red, y_red, x_green, y_green, x_blue,
+ y_blue;
png_debug(1, "in png_handle_cHRM");
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before cHRM");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid cHRM after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (png_ptr->mode & PNG_HAVE_PLTE)
/* Should be an error, but we can cope with it */
png_warning(png_ptr, "Missing PLTE before cHRM");
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)
-#ifdef PNG_READ_sRGB_SUPPORTED
- && !(info_ptr->valid & PNG_INFO_sRGB)
-#endif
+# ifdef PNG_READ_sRGB_SUPPORTED
+ && !(info_ptr->valid & PNG_INFO_sRGB)
+# endif
)
{
png_warning(png_ptr, "Duplicate cHRM chunk");
}
png_crc_read(png_ptr, buf, 32);
+
if (png_crc_finish(png_ptr, 0))
return;
- uint_x = png_get_uint_32(buf);
- uint_y = png_get_uint_32(buf + 4);
- int_x_white = (png_fixed_point)uint_x;
- int_y_white = (png_fixed_point)uint_y;
-
- uint_x = png_get_uint_32(buf + 8);
- uint_y = png_get_uint_32(buf + 12);
- int_x_red = (png_fixed_point)uint_x;
- int_y_red = (png_fixed_point)uint_y;
-
- uint_x = png_get_uint_32(buf + 16);
- uint_y = png_get_uint_32(buf + 20);
- int_x_green = (png_fixed_point)uint_x;
- int_y_green = (png_fixed_point)uint_y;
+ x_white = png_get_fixed_point(NULL, buf);
+ y_white = png_get_fixed_point(NULL, buf + 4);
+ x_red = png_get_fixed_point(NULL, buf + 8);
+ y_red = png_get_fixed_point(NULL, buf + 12);
+ x_green = png_get_fixed_point(NULL, buf + 16);
+ y_green = png_get_fixed_point(NULL, buf + 20);
+ x_blue = png_get_fixed_point(NULL, buf + 24);
+ y_blue = png_get_fixed_point(NULL, buf + 28);
- uint_x = png_get_uint_32(buf + 24);
- uint_y = png_get_uint_32(buf + 28);
- int_x_blue = (png_fixed_point)uint_x;
- int_y_blue = (png_fixed_point)uint_y;
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- white_x = (float)int_x_white / (float)100000.0;
- white_y = (float)int_y_white / (float)100000.0;
- red_x = (float)int_x_red / (float)100000.0;
- red_y = (float)int_y_red / (float)100000.0;
- green_x = (float)int_x_green / (float)100000.0;
- green_y = (float)int_y_green / (float)100000.0;
- blue_x = (float)int_x_blue / (float)100000.0;
- blue_y = (float)int_y_blue / (float)100000.0;
-#endif
+ if (x_white == PNG_FIXED_ERROR ||
+ y_white == PNG_FIXED_ERROR ||
+ x_red == PNG_FIXED_ERROR ||
+ y_red == PNG_FIXED_ERROR ||
+ x_green == PNG_FIXED_ERROR ||
+ y_green == PNG_FIXED_ERROR ||
+ x_blue == PNG_FIXED_ERROR ||
+ y_blue == PNG_FIXED_ERROR)
+ {
+ png_warning(png_ptr, "Ignoring cHRM chunk with negative chromaticities");
+ return;
+ }
#ifdef PNG_READ_sRGB_SUPPORTED
if ((info_ptr != NULL) && (info_ptr->valid & PNG_INFO_sRGB))
+ {
+ if (PNG_OUT_OF_RANGE(x_white, 31270, 1000) ||
+ PNG_OUT_OF_RANGE(y_white, 32900, 1000) ||
+ PNG_OUT_OF_RANGE(x_red, 64000L, 1000) ||
+ PNG_OUT_OF_RANGE(y_red, 33000, 1000) ||
+ PNG_OUT_OF_RANGE(x_green, 30000, 1000) ||
+ PNG_OUT_OF_RANGE(y_green, 60000L, 1000) ||
+ PNG_OUT_OF_RANGE(x_blue, 15000, 1000) ||
+ PNG_OUT_OF_RANGE(y_blue, 6000, 1000))
{
- if (PNG_OUT_OF_RANGE(int_x_white, 31270, 1000) ||
- PNG_OUT_OF_RANGE(int_y_white, 32900, 1000) ||
- PNG_OUT_OF_RANGE(int_x_red, 64000L, 1000) ||
- PNG_OUT_OF_RANGE(int_y_red, 33000, 1000) ||
- PNG_OUT_OF_RANGE(int_x_green, 30000, 1000) ||
- PNG_OUT_OF_RANGE(int_y_green, 60000L, 1000) ||
- PNG_OUT_OF_RANGE(int_x_blue, 15000, 1000) ||
- PNG_OUT_OF_RANGE(int_y_blue, 6000, 1000))
- {
- png_warning(png_ptr,
- "Ignoring incorrect cHRM value when sRGB is also present");
+ png_warning(png_ptr,
+ "Ignoring incorrect cHRM value when sRGB is also present");
+
#ifdef PNG_CONSOLE_IO_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- fprintf(stderr, "wx=%f, wy=%f, rx=%f, ry=%f\n",
- white_x, white_y, red_x, red_y);
- fprintf(stderr, "gx=%f, gy=%f, bx=%f, by=%f\n",
- green_x, green_y, blue_x, blue_y);
-#else
- fprintf(stderr, "wx=%ld, wy=%ld, rx=%ld, ry=%ld\n",
- (long)int_x_white, (long)int_y_white,
- (long)int_x_red, (long)int_y_red);
- fprintf(stderr, "gx=%ld, gy=%ld, bx=%ld, by=%ld\n",
- (long)int_x_green, (long)int_y_green,
- (long)int_x_blue, (long)int_y_blue);
-#endif
+ fprintf(stderr, "wx=%d, wy=%d, rx=%d, ry=%d\n",
+ x_white, y_white, x_red, y_red);
+
+ fprintf(stderr, "gx=%d, gy=%d, bx=%d, by=%d\n",
+ x_green, y_green, x_blue, y_blue);
#endif /* PNG_CONSOLE_IO_SUPPORTED */
- }
- return;
}
+ return;
+ }
#endif /* PNG_READ_sRGB_SUPPORTED */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- png_set_cHRM(png_ptr, info_ptr,
- white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
- png_set_cHRM_fixed(png_ptr, info_ptr,
- int_x_white, int_y_white, int_x_red, int_y_red, int_x_green,
- int_y_green, int_x_blue, int_y_blue);
-#endif
+ png_set_cHRM_fixed(png_ptr, info_ptr, x_white, y_white, x_red, y_red,
+ x_green, y_green, x_blue, y_blue);
}
#endif
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before sRGB");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid sRGB after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (png_ptr->mode & PNG_HAVE_PLTE)
/* Should be an error, but we can cope with it */
png_warning(png_ptr, "Out of place sRGB chunk");
}
png_crc_read(png_ptr, buf, 1);
+
if (png_crc_finish(png_ptr, 0))
return;
intent = buf[0];
+
/* Check for bad intent */
if (intent >= PNG_sRGB_INTENT_LAST)
{
#if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED)
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA))
{
- png_fixed_point igamma;
-#ifdef PNG_FIXED_POINT_SUPPORTED
- igamma=info_ptr->int_gamma;
-#else
-# ifdef PNG_FLOATING_POINT_SUPPORTED
- igamma=(png_fixed_point)(info_ptr->gamma * 100000.);
-# endif
-#endif
- if (PNG_OUT_OF_RANGE(igamma, 45500L, 500))
+ if (PNG_OUT_OF_RANGE(info_ptr->gamma, 45500L, 500))
{
png_warning(png_ptr,
- "Ignoring incorrect gAMA value when sRGB is also present");
+ "Ignoring incorrect gAMA value when sRGB is also present");
#ifdef PNG_CONSOLE_IO_SUPPORTED
-# ifdef PNG_FIXED_POINT_SUPPORTED
- fprintf(stderr, "incorrect gamma=(%d/100000)\n",
- (int)png_ptr->int_gamma);
-# else
-# ifdef PNG_FLOATING_POINT_SUPPORTED
- fprintf(stderr, "incorrect gamma=%f\n", png_ptr->gamma);
-# endif
-# endif
+ fprintf(stderr, "incorrect gamma=(%d/100000)\n", info_ptr->gamma);
#endif
}
}
#endif /* PNG_READ_gAMA_SUPPORTED */
#ifdef PNG_READ_cHRM_SUPPORTED
-#ifdef PNG_FIXED_POINT_SUPPORTED
if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
- if (PNG_OUT_OF_RANGE(info_ptr->int_x_white, 31270, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->int_y_white, 32900, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->int_x_red, 64000L, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->int_y_red, 33000, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->int_x_green, 30000, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->int_y_green, 60000L, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->int_x_blue, 15000, 1000) ||
- PNG_OUT_OF_RANGE(info_ptr->int_y_blue, 6000, 1000))
- {
- png_warning(png_ptr,
- "Ignoring incorrect cHRM value when sRGB is also present");
- }
-#endif /* PNG_FIXED_POINT_SUPPORTED */
+ if (PNG_OUT_OF_RANGE(info_ptr->x_white, 31270, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->y_white, 32900, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->x_red, 64000L, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->y_red, 33000, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->x_green, 30000, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->y_green, 60000L, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->x_blue, 15000, 1000) ||
+ PNG_OUT_OF_RANGE(info_ptr->y_blue, 6000, 1000))
+ {
+ png_warning(png_ptr,
+ "Ignoring incorrect cHRM value when sRGB is also present");
+ }
#endif /* PNG_READ_cHRM_SUPPORTED */
png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, intent);
png_bytep pC;
png_charp profile;
png_uint_32 skip = 0;
- png_uint_32 profile_size, profile_length;
+ png_uint_32 profile_size;
+ png_alloc_size_t profile_length;
png_size_t slength, prefix_length, data_length;
png_debug(1, "in png_handle_iCCP");
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before iCCP");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid iCCP after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (png_ptr->mode & PNG_HAVE_PLTE)
/* Should be an error, but we can cope with it */
png_warning(png_ptr, "Out of place iCCP chunk");
/* There should be at least one zero (the compression type byte)
* following the separator, and we should be on it
*/
- if ( profile >= png_ptr->chunkdata + slength - 1)
+ if (profile >= png_ptr->chunkdata + slength - 1)
{
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
/* Compression_type should always be zero */
compression_type = *profile++;
+
if (compression_type)
{
png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk");
prefix_length = profile - png_ptr->chunkdata;
png_decompress_chunk(png_ptr, compression_type,
- slength, prefix_length, &data_length);
+ slength, prefix_length, &data_length);
profile_length = data_length - prefix_length;
- if ( prefix_length > data_length || profile_length < 4)
+ if (prefix_length > data_length || profile_length < 4)
{
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
/* Check the profile_size recorded in the first 32 bits of the ICC profile */
pC = (png_bytep)(png_ptr->chunkdata + prefix_length);
- profile_size = ((*(pC ))<<24) |
- ((*(pC + 1))<<16) |
- ((*(pC + 2))<< 8) |
- ((*(pC + 3)) );
+ profile_size = ((*(pC )) << 24) |
+ ((*(pC + 1)) << 16) |
+ ((*(pC + 2)) << 8) |
+ ((*(pC + 3)) );
+ /* NOTE: the following guarantees that 'profile_length' fits into 32 bits,
+ * because profile_size is a 32 bit value.
+ */
if (profile_size < profile_length)
profile_length = profile_size;
+ /* And the following guarantees that profile_size == profile_length. */
if (profile_size > profile_length)
{
-#ifdef PNG_STDIO_SUPPORTED
- char umsg[50];
-#endif
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
- png_warning(png_ptr, "Ignoring truncated iCCP profile");
#ifdef PNG_STDIO_SUPPORTED
-
- png_snprintf(umsg, 50, "declared profile size = %lu",
- (unsigned long)profile_size);
- png_warning(png_ptr, umsg);
- png_snprintf(umsg, 50, "actual profile length = %lu",
- (unsigned long)profile_length);
- png_warning(png_ptr, umsg);
+ {
+ char umsg[80];
+
+ png_snprintf2(umsg, 80,
+ "Ignoring iCCP chunk with declared size = %u "
+ "and actual length = %u",
+ (unsigned int) profile_size,
+ (unsigned int) profile_length);
+ png_warning(png_ptr, umsg);
+ }
+#else
+ png_warning(png_ptr,
+ "Ignoring iCCP chunk with uncompressed size mismatch");
#endif
return;
}
png_set_iCCP(png_ptr, info_ptr, png_ptr->chunkdata,
- compression_type, png_ptr->chunkdata + prefix_length, profile_length);
+ compression_type, (png_bytep)png_ptr->chunkdata + prefix_length,
+ profile_size);
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
}
{
png_bytep entry_start;
png_sPLT_t new_palette;
-#ifdef PNG_POINTER_INDEXING_SUPPORTED
png_sPLT_entryp pp;
-#endif
- int data_length, entry_size, i;
+ png_uint_32 data_length;
+ int entry_size, i;
png_uint_32 skip = 0;
png_size_t slength;
+ png_uint_32 dl;
+ png_size_t max_dl;
png_debug(1, "in png_handle_sPLT");
png_crc_finish(png_ptr, length);
return;
}
+
if (--png_ptr->user_chunk_cache_max == 1)
{
png_warning(png_ptr, "No space in chunk cache for sPLT");
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before sPLT");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid sPLT after IDAT");
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
+
+ /* WARNING: this may break if size_t is less than 32 bits; it is assumed
+ * that the PNG_MAX_MALLOC_64K test is enabled in this case, but this is a
+ * potential breakage point if the types in pngconf.h aren't exactly right.
+ */
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
for (entry_start = (png_bytep)png_ptr->chunkdata; *entry_start;
entry_start++)
/* Empty loop to find end of name */ ;
+
++entry_start;
/* A sample depth should follow the separator, and we should be on it */
new_palette.depth = *entry_start++;
entry_size = (new_palette.depth == 8 ? 6 : 10);
- data_length = (slength - (entry_start - (png_bytep)png_ptr->chunkdata));
+ /* This must fit in a png_uint_32 because it is derived from the original
+ * chunk data length (and use 'length', not 'slength' here for clarity -
+ * they are guaranteed to be the same, see the tests above.)
+ */
+ data_length = length - (png_uint_32)(entry_start -
+ (png_bytep)png_ptr->chunkdata);
/* Integrity-check the data length */
if (data_length % entry_size)
return;
}
- new_palette.nentries = (png_int_32) ( data_length / entry_size);
- if ((png_uint_32) new_palette.nentries >
- (png_uint_32) (PNG_SIZE_MAX / png_sizeof(png_sPLT_entry)))
+ dl = (png_int_32)(data_length / entry_size);
+ max_dl = PNG_SIZE_MAX / png_sizeof(png_sPLT_entry);
+
+ if (dl > max_dl)
{
png_warning(png_ptr, "sPLT chunk too long");
return;
}
+
+ new_palette.nentries = (png_int_32)(data_length / entry_size);
+
new_palette.entries = (png_sPLT_entryp)png_malloc_warn(
png_ptr, new_palette.nentries * png_sizeof(png_sPLT_entry));
+
if (new_palette.entries == NULL)
{
png_warning(png_ptr, "sPLT chunk requires too much memory");
if (new_palette.depth == 8)
{
- pp->red = *entry_start++;
- pp->green = *entry_start++;
- pp->blue = *entry_start++;
- pp->alpha = *entry_start++;
+ pp->red = *entry_start++;
+ pp->green = *entry_start++;
+ pp->blue = *entry_start++;
+ pp->alpha = *entry_start++;
}
+
else
{
- pp->red = png_get_uint_16(entry_start); entry_start += 2;
- pp->green = png_get_uint_16(entry_start); entry_start += 2;
- pp->blue = png_get_uint_16(entry_start); entry_start += 2;
- pp->alpha = png_get_uint_16(entry_start); entry_start += 2;
+ pp->red = png_get_uint_16(entry_start); entry_start += 2;
+ pp->green = png_get_uint_16(entry_start); entry_start += 2;
+ pp->blue = png_get_uint_16(entry_start); entry_start += 2;
+ pp->alpha = png_get_uint_16(entry_start); entry_start += 2;
}
+
pp->frequency = png_get_uint_16(entry_start); entry_start += 2;
}
#else
pp = new_palette.entries;
+
for (i = 0; i < new_palette.nentries; i++)
{
if (new_palette.depth == 8)
{
- pp[i].red = *entry_start++;
- pp[i].green = *entry_start++;
- pp[i].blue = *entry_start++;
- pp[i].alpha = *entry_start++;
+ pp[i].red = *entry_start++;
+ pp[i].green = *entry_start++;
+ pp[i].blue = *entry_start++;
+ pp[i].alpha = *entry_start++;
}
+
else
{
- pp[i].red = png_get_uint_16(entry_start); entry_start += 2;
- pp[i].green = png_get_uint_16(entry_start); entry_start += 2;
- pp[i].blue = png_get_uint_16(entry_start); entry_start += 2;
- pp[i].alpha = png_get_uint_16(entry_start); entry_start += 2;
+ pp[i].red = png_get_uint_16(entry_start); entry_start += 2;
+ pp[i].green = png_get_uint_16(entry_start); entry_start += 2;
+ pp[i].blue = png_get_uint_16(entry_start); entry_start += 2;
+ pp[i].alpha = png_get_uint_16(entry_start); entry_start += 2;
}
- pp->frequency = png_get_uint_16(entry_start); entry_start += 2;
+
+ pp[i].frequency = png_get_uint_16(entry_start); entry_start += 2;
}
#endif
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before tRNS");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid tRNS after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
{
png_warning(png_ptr, "Duplicate tRNS chunk");
png_ptr->num_trans = 1;
png_ptr->trans_color.gray = png_get_uint_16(buf);
}
+
else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
{
png_byte buf[6];
png_crc_finish(png_ptr, length);
return;
}
+
png_crc_read(png_ptr, buf, (png_size_t)length);
png_ptr->num_trans = 1;
png_ptr->trans_color.red = png_get_uint_16(buf);
png_ptr->trans_color.green = png_get_uint_16(buf + 2);
png_ptr->trans_color.blue = png_get_uint_16(buf + 4);
}
+
else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
if (!(png_ptr->mode & PNG_HAVE_PLTE))
/* Should be an error, but we can cope with it. */
png_warning(png_ptr, "Missing PLTE before tRNS");
}
+
if (length > (png_uint_32)png_ptr->num_palette ||
length > PNG_MAX_PALETTE_LENGTH)
{
png_crc_finish(png_ptr, length);
return;
}
+
if (length == 0)
{
png_warning(png_ptr, "Zero length tRNS chunk");
png_crc_finish(png_ptr, length);
return;
}
+
png_crc_read(png_ptr, readbuf, (png_size_t)length);
png_ptr->num_trans = (png_uint_16)length;
}
+
else
{
png_warning(png_ptr, "tRNS chunk not allowed with alpha channel");
}
png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans,
- &(png_ptr->trans_color));
+ &(png_ptr->trans_color));
}
#endif
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before bKGD");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid bKGD after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
- !(png_ptr->mode & PNG_HAVE_PLTE))
+ !(png_ptr->mode & PNG_HAVE_PLTE))
{
png_warning(png_ptr, "Missing PLTE before bKGD");
png_crc_finish(png_ptr, length);
return;
}
+
else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD))
{
png_warning(png_ptr, "Duplicate bKGD chunk");
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
truelen = 1;
+
else if (png_ptr->color_type & PNG_COLOR_MASK_COLOR)
truelen = 6;
+
else
truelen = 2;
}
png_crc_read(png_ptr, buf, truelen);
+
if (png_crc_finish(png_ptr, 0))
return;
/* We convert the index value into RGB components so that we can allow
* arbitrary RGB values for background when we have transparency, and
* so it is easy to determine the RGB values of the background color
- * from the info_ptr struct. */
+ * from the info_ptr struct.
+ */
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
png_ptr->background.index = buf[0];
+
if (info_ptr && info_ptr->num_palette)
{
- if (buf[0] >= info_ptr->num_palette)
- {
- png_warning(png_ptr, "Incorrect bKGD chunk index value");
- return;
- }
- png_ptr->background.red =
+ if (buf[0] >= info_ptr->num_palette)
+ {
+ png_warning(png_ptr, "Incorrect bKGD chunk index value");
+ return;
+ }
+
+ png_ptr->background.red =
(png_uint_16)png_ptr->palette[buf[0]].red;
- png_ptr->background.green =
+
+ png_ptr->background.green =
(png_uint_16)png_ptr->palette[buf[0]].green;
- png_ptr->background.blue =
+
+ png_ptr->background.blue =
(png_uint_16)png_ptr->palette[buf[0]].blue;
}
}
+
else if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) /* GRAY */
{
png_ptr->background.red =
png_ptr->background.blue =
png_ptr->background.gray = png_get_uint_16(buf);
}
+
else
{
png_ptr->background.red = png_get_uint_16(buf);
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before hIST");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid hIST after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (!(png_ptr->mode & PNG_HAVE_PLTE))
{
png_warning(png_ptr, "Missing PLTE before hIST");
png_crc_finish(png_ptr, length);
return;
}
+
else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST))
{
png_warning(png_ptr, "Duplicate hIST chunk");
}
num = length / 2 ;
- if (num != (unsigned int) png_ptr->num_palette || num >
- (unsigned int) PNG_MAX_PALETTE_LENGTH)
+
+ if (num != (unsigned int)png_ptr->num_palette || num >
+ (unsigned int)PNG_MAX_PALETTE_LENGTH)
{
png_warning(png_ptr, "Incorrect hIST chunk length");
png_crc_finish(png_ptr, length);
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before pHYs");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid pHYs after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_warning(png_ptr, "Duplicate pHYs chunk");
}
png_crc_read(png_ptr, buf, 9);
+
if (png_crc_finish(png_ptr, 0))
return;
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before oFFs");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid oFFs after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs))
{
png_warning(png_ptr, "Duplicate oFFs chunk");
}
png_crc_read(png_ptr, buf, 9);
+
if (png_crc_finish(png_ptr, 0))
return;
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before pCAL");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid pCAL after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL))
{
png_warning(png_ptr, "Duplicate pCAL chunk");
return;
}
- png_debug1(2, "Allocating and reading pCAL chunk data (%lu bytes)",
- length + 1);
+ png_debug1(2, "Allocating and reading pCAL chunk data (%u bytes)",
+ length + 1);
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+
if (png_ptr->chunkdata == NULL)
- {
- png_warning(png_ptr, "No memory for pCAL purpose");
- return;
- }
+ {
+ png_warning(png_ptr, "No memory for pCAL purpose");
+ return;
+ }
+
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
endptr = png_ptr->chunkdata + slength;
/* We need to have at least 12 bytes after the purpose string
- in order to get the parameter information. */
+ * in order to get the parameter information.
+ */
if (endptr <= buf + 12)
{
png_warning(png_ptr, "Invalid pCAL data");
png_debug(3, "Checking pCAL equation type and number of parameters");
/* Check that we have the right number of parameters for known
- equation types. */
+ * equation types.
+ */
if ((type == PNG_EQUATION_LINEAR && nparams != 2) ||
(type == PNG_EQUATION_BASE_E && nparams != 3) ||
(type == PNG_EQUATION_ARBITRARY && nparams != 3) ||
png_ptr->chunkdata = NULL;
return;
}
+
else if (type >= PNG_EQUATION_LAST)
{
png_warning(png_ptr, "Unrecognized equation type for pCAL chunk");
/* Empty loop to move past the units string. */ ;
png_debug(3, "Allocating pCAL parameters array");
+
params = (png_charpp)png_malloc_warn(png_ptr,
- (png_size_t)(nparams * png_sizeof(png_charp)));
+ (png_size_t)(nparams * png_sizeof(png_charp)));
+
if (params == NULL)
- {
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- png_warning(png_ptr, "No memory for pCAL params");
- return;
- }
+ {
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ png_warning(png_ptr, "No memory for pCAL params");
+ return;
+ }
/* Get pointers to the start of each parameter string. */
for (i = 0; i < (int)nparams; i++)
buf++; /* Skip the null string terminator from previous parameter. */
png_debug1(3, "Reading pCAL parameter %d", i);
+
for (params[i] = buf; buf <= endptr && *buf != 0x00; buf++)
/* Empty loop to move past each parameter string */ ;
void /* PRIVATE */
png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
- png_charp ep;
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- double width, height;
- png_charp vp;
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
- png_charp swidth, sheight;
-#endif
-#endif
- png_size_t slength;
+ png_size_t slength, i;
+ int state;
png_debug(1, "in png_handle_sCAL");
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Missing IHDR before sCAL");
+
else if (png_ptr->mode & PNG_HAVE_IDAT)
{
png_warning(png_ptr, "Invalid sCAL after IDAT");
png_crc_finish(png_ptr, length);
return;
}
+
else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL))
{
png_warning(png_ptr, "Duplicate sCAL chunk");
return;
}
- png_debug1(2, "Allocating and reading sCAL chunk data (%lu bytes)",
+ png_debug1(2, "Allocating and reading sCAL chunk data (%u bytes)",
length + 1);
+
png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+
if (png_ptr->chunkdata == NULL)
{
png_warning(png_ptr, "Out of memory while processing sCAL chunk");
png_crc_finish(png_ptr, length);
return;
}
+
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
+ png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */
if (png_crc_finish(png_ptr, 0))
{
return;
}
- png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */
-
- ep = png_ptr->chunkdata + 1; /* Skip unit byte */
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- width = png_strtod(png_ptr, ep, &vp);
- if (*vp)
- {
- png_warning(png_ptr, "malformed width string in sCAL chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
- swidth = (png_charp)png_malloc_warn(png_ptr, png_strlen(ep) + 1);
- if (swidth == NULL)
+ /* Validate the unit. */
+ if (png_ptr->chunkdata[0] != 1 && png_ptr->chunkdata[0] != 2)
{
- png_warning(png_ptr, "Out of memory while processing sCAL chunk width");
+ png_warning(png_ptr, "Invalid sCAL ignored: invalid unit");
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
return;
}
- png_memcpy(swidth, ep, png_strlen(ep));
-#endif
-#endif
- for (ep = png_ptr->chunkdata; *ep; ep++)
- /* Empty loop */ ;
- ep++;
+ /* Validate the ASCII numbers, need two ASCII numbers separated by
+ * a '\0' and they need to fit exactly in the chunk data.
+ */
+ i = 0;
+ state = 0;
- if (png_ptr->chunkdata + slength < ep)
- {
- png_warning(png_ptr, "Truncated sCAL chunk");
-#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
- png_free(png_ptr, swidth);
-#endif
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
+ if (png_ptr->chunkdata[1] == 45 /* negative width */ ||
+ !png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) ||
+ i >= slength || png_ptr->chunkdata[i++] != 0)
+ png_warning(png_ptr, "Invalid sCAL chunk ignored: bad width format");
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- height = png_strtod(png_ptr, ep, &vp);
- if (*vp)
- {
- png_warning(png_ptr, "malformed height string in sCAL chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
- }
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
- sheight = (png_charp)png_malloc_warn(png_ptr, png_strlen(ep) + 1);
- if (sheight == NULL)
- {
- png_warning(png_ptr, "Out of memory while processing sCAL chunk height");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- png_free(png_ptr, swidth);
- return;
- }
- png_memcpy(sheight, ep, png_strlen(ep));
-#endif
-#endif
-
- if (png_ptr->chunkdata + slength < ep
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- || width <= 0. || height <= 0.
-#endif
- )
+ else
{
- png_warning(png_ptr, "Invalid sCAL data");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
-#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
- png_free(png_ptr, swidth);
- png_free(png_ptr, sheight);
-#endif
- return;
- }
+ png_size_t heighti = i;
+ if (png_ptr->chunkdata[i] == 45 /* negative height */ ||
+ !png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) ||
+ i != slength)
+ png_warning(png_ptr, "Invalid sCAL chunk ignored: bad height format");
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- png_set_sCAL(png_ptr, info_ptr, png_ptr->chunkdata[0], width, height);
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
- png_set_sCAL_s(png_ptr, info_ptr, png_ptr->chunkdata[0], swidth, sheight);
-#endif
-#endif
+ else
+ /* This is the (only) success case. */
+ png_set_sCAL_s(png_ptr, info_ptr, png_ptr->chunkdata[0],
+ png_ptr->chunkdata+1, png_ptr->chunkdata+heighti);
+ }
+ /* Clean up - just free the temporarily allocated buffer. */
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
-#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
- png_free(png_ptr, swidth);
- png_free(png_ptr, sheight);
-#endif
}
#endif
if (!(png_ptr->mode & PNG_HAVE_IHDR))
png_error(png_ptr, "Out of place tIME chunk");
+
else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME))
{
png_warning(png_ptr, "Duplicate tIME chunk");
}
png_crc_read(png_ptr, buf, 7);
+
if (png_crc_finish(png_ptr, 0))
return;
png_crc_finish(png_ptr, length);
return;
}
+
if (--png_ptr->user_chunk_cache_max == 1)
{
png_warning(png_ptr, "No space in chunk cache for tEXt");
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+
if (png_ptr->chunkdata == NULL)
{
png_warning(png_ptr, "No memory to process text chunk");
return;
}
+
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
text++;
text_ptr = (png_textp)png_malloc_warn(png_ptr,
- png_sizeof(png_text));
+ png_sizeof(png_text));
+
if (text_ptr == NULL)
{
- png_warning(png_ptr, "Not enough memory to process text chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
+ png_warning(png_ptr, "Not enough memory to process text chunk");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
}
+
text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
text_ptr->key = key;
-#ifdef PNG_iTXt_SUPPORTED
text_ptr->lang = NULL;
text_ptr->lang_key = NULL;
text_ptr->itxt_length = 0;
-#endif
text_ptr->text = text;
text_ptr->text_length = png_strlen(text);
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
png_free(png_ptr, text_ptr);
+
if (ret)
- png_warning(png_ptr, "Insufficient memory to process text chunk");
+ png_warning(png_ptr, "Insufficient memory to process text chunk");
}
#endif
png_crc_finish(png_ptr, length);
return;
}
+
if (--png_ptr->user_chunk_cache_max == 1)
{
png_warning(png_ptr, "No space in chunk cache for zTXt");
#ifdef PNG_MAX_MALLOC_64K
/* We will no doubt have problems with chunks even half this size, but
- there is no hard and fast rule to tell us where to stop. */
+ * there is no hard and fast rule to tell us where to stop.
+ */
if (length > (png_uint_32)65535L)
{
- png_warning(png_ptr, "zTXt chunk too large to fit in memory");
- png_crc_finish(png_ptr, length);
- return;
+ png_warning(png_ptr, "zTXt chunk too large to fit in memory");
+ png_crc_finish(png_ptr, length);
+ return;
}
#endif
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+
if (png_ptr->chunkdata == NULL)
{
- png_warning(png_ptr, "Out of memory processing zTXt chunk");
- return;
+ png_warning(png_ptr, "Out of memory processing zTXt chunk");
+ return;
}
+
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
+
if (png_crc_finish(png_ptr, 0))
{
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
return;
}
+
else
{
comp_type = *(++text);
+
if (comp_type != PNG_TEXT_COMPRESSION_zTXt)
{
png_warning(png_ptr, "Unknown compression type in zTXt chunk");
comp_type = PNG_TEXT_COMPRESSION_zTXt;
}
+
text++; /* Skip the compression_method byte */
}
+
prefix_len = text - png_ptr->chunkdata;
png_decompress_chunk(png_ptr, comp_type,
- (png_size_t)length, prefix_len, &data_len);
+ (png_size_t)length, prefix_len, &data_len);
text_ptr = (png_textp)png_malloc_warn(png_ptr,
- png_sizeof(png_text));
+ png_sizeof(png_text));
+
if (text_ptr == NULL)
{
- png_warning(png_ptr, "Not enough memory to process zTXt chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
+ png_warning(png_ptr, "Not enough memory to process zTXt chunk");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
}
+
text_ptr->compression = comp_type;
text_ptr->key = png_ptr->chunkdata;
-#ifdef PNG_iTXt_SUPPORTED
text_ptr->lang = NULL;
text_ptr->lang_key = NULL;
text_ptr->itxt_length = 0;
-#endif
text_ptr->text = png_ptr->chunkdata + prefix_len;
text_ptr->text_length = data_len;
png_free(png_ptr, text_ptr);
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
+
if (ret)
- png_error(png_ptr, "Insufficient memory to store zTXt chunk");
+ png_error(png_ptr, "Insufficient memory to store zTXt chunk");
}
#endif
png_crc_finish(png_ptr, length);
return;
}
+
if (--png_ptr->user_chunk_cache_max == 1)
{
png_warning(png_ptr, "No space in chunk cache for iTXt");
#ifdef PNG_MAX_MALLOC_64K
/* We will no doubt have problems with chunks even half this size, but
- there is no hard and fast rule to tell us where to stop. */
+ * there is no hard and fast rule to tell us where to stop.
+ */
if (length > (png_uint_32)65535L)
{
- png_warning(png_ptr, "iTXt chunk too large to fit in memory");
- png_crc_finish(png_ptr, length);
- return;
+ png_warning(png_ptr, "iTXt chunk too large to fit in memory");
+ png_crc_finish(png_ptr, length);
+ return;
}
#endif
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1);
+
if (png_ptr->chunkdata == NULL)
{
- png_warning(png_ptr, "No memory to process iTXt chunk");
- return;
+ png_warning(png_ptr, "No memory to process iTXt chunk");
+ return;
}
+
slength = (png_size_t)length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
+
if (png_crc_finish(png_ptr, 0))
{
png_free(png_ptr, png_ptr->chunkdata);
for (lang = png_ptr->chunkdata; *lang; lang++)
/* Empty loop */ ;
+
lang++; /* Skip NUL separator */
/* iTXt must have a language tag (possibly empty), two compression bytes,
png_ptr->chunkdata = NULL;
return;
}
+
else
{
- comp_flag = *lang++;
- comp_type = *lang++;
+ comp_flag = *lang++;
+ comp_type = *lang++;
}
for (lang_key = lang; *lang_key; lang_key++)
/* Empty loop */ ;
+
lang_key++; /* Skip NUL separator */
if (lang_key >= png_ptr->chunkdata + slength)
for (text = lang_key; *text; text++)
/* Empty loop */ ;
+
text++; /* Skip NUL separator */
+
if (text >= png_ptr->chunkdata + slength)
{
png_warning(png_ptr, "Malformed iTXt chunk");
prefix_len = text - png_ptr->chunkdata;
key=png_ptr->chunkdata;
+
if (comp_flag)
- png_decompress_chunk(png_ptr, comp_type,
- (size_t)length, prefix_len, &data_len);
+ png_decompress_chunk(png_ptr, comp_type,
+ (size_t)length, prefix_len, &data_len);
+
else
- data_len = png_strlen(png_ptr->chunkdata + prefix_len);
+ data_len = png_strlen(png_ptr->chunkdata + prefix_len);
+
text_ptr = (png_textp)png_malloc_warn(png_ptr,
- png_sizeof(png_text));
+ png_sizeof(png_text));
+
if (text_ptr == NULL)
{
- png_warning(png_ptr, "Not enough memory to process iTXt chunk");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
+ png_warning(png_ptr, "Not enough memory to process iTXt chunk");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
}
+
text_ptr->compression = (int)comp_flag + 1;
text_ptr->lang_key = png_ptr->chunkdata + (lang_key - key);
text_ptr->lang = png_ptr->chunkdata + (lang - key);
png_free(png_ptr, text_ptr);
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
+
if (ret)
- png_error(png_ptr, "Insufficient memory to store iTXt chunk");
+ png_error(png_ptr, "Insufficient memory to store iTXt chunk");
}
#endif
/* This function is called when we haven't found a handler for a
- chunk. If there isn't a problem with the chunk itself (ie bad
- chunk name, CRC, or a critical chunk), the chunk is silently ignored
- -- unless the PNG_FLAG_UNKNOWN_CHUNKS_SUPPORTED flag is on in which
- case it will be saved away to be written out later. */
+ * chunk. If there isn't a problem with the chunk itself (ie bad
+ * chunk name, CRC, or a critical chunk), the chunk is silently ignored
+ * -- unless the PNG_FLAG_UNKNOWN_CHUNKS_SUPPORTED flag is on in which
+ * case it will be saved away to be written out later.
+ */
void /* PRIVATE */
png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
png_crc_finish(png_ptr, length);
return;
}
+
if (--png_ptr->user_chunk_cache_max == 1)
{
png_warning(png_ptr, "No space in chunk cache for unknown chunk");
if (png_ptr->mode & PNG_HAVE_IDAT)
{
PNG_IDAT;
+
if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) /* Not an IDAT */
png_ptr->mode |= PNG_AFTER_IDAT;
}
{
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
- PNG_HANDLE_CHUNK_ALWAYS
+ PNG_HANDLE_CHUNK_ALWAYS
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
- && png_ptr->read_user_chunk_fn == NULL
+ && png_ptr->read_user_chunk_fn == NULL
#endif
- )
+ )
#endif
- png_chunk_error(png_ptr, "unknown critical chunk");
+ png_chunk_error(png_ptr, "unknown critical chunk");
}
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
|| (png_ptr->read_user_chunk_fn != NULL)
#endif
- )
+ )
{
#ifdef PNG_MAX_MALLOC_64K
- if (length > (png_uint_32)65535L)
- {
- png_warning(png_ptr, "unknown chunk too large to fit in memory");
- skip = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
- }
+ if (length > (png_uint_32)65535L)
+ {
+ png_warning(png_ptr, "unknown chunk too large to fit in memory");
+ skip = length - (png_uint_32)65535L;
+ length = (png_uint_32)65535L;
+ }
#endif
- png_memcpy((png_charp)png_ptr->unknown_chunk.name,
- (png_charp)png_ptr->chunk_name,
- png_sizeof(png_ptr->unknown_chunk.name));
- png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name)-1]
- = '\0';
- png_ptr->unknown_chunk.size = (png_size_t)length;
- if (length == 0)
+
+ png_memcpy((png_charp)png_ptr->unknown_chunk.name,
+ (png_charp)png_ptr->chunk_name,
+ png_sizeof(png_ptr->unknown_chunk.name));
+
+ png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name)-1]
+ = '\0';
+
+ png_ptr->unknown_chunk.size = (png_size_t)length;
+
+ if (length == 0)
png_ptr->unknown_chunk.data = NULL;
- else
- {
+
+ else
+ {
png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length);
png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, length);
- }
+ }
+
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
- if (png_ptr->read_user_chunk_fn != NULL)
- {
- /* Callback to user unknown chunk handler */
- int ret;
- ret = (*(png_ptr->read_user_chunk_fn))
- (png_ptr, &png_ptr->unknown_chunk);
- if (ret < 0)
- png_chunk_error(png_ptr, "error in user chunk");
- if (ret == 0)
- {
- if (!(png_ptr->chunk_name[0] & 0x20))
+ if (png_ptr->read_user_chunk_fn != NULL)
+ {
+ /* Callback to user unknown chunk handler */
+ int ret;
+
+ ret = (*(png_ptr->read_user_chunk_fn))
+ (png_ptr, &png_ptr->unknown_chunk);
+
+ if (ret < 0)
+ png_chunk_error(png_ptr, "error in user chunk");
+
+ if (ret == 0)
+ {
+ if (!(png_ptr->chunk_name[0] & 0x20))
+ {
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
- PNG_HANDLE_CHUNK_ALWAYS)
+ if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
+ PNG_HANDLE_CHUNK_ALWAYS)
#endif
- png_chunk_error(png_ptr, "unknown critical chunk");
- png_set_unknown_chunks(png_ptr, info_ptr,
- &png_ptr->unknown_chunk, 1);
- }
- }
- else
+ png_chunk_error(png_ptr, "unknown critical chunk");
+ }
+
+ png_set_unknown_chunks(png_ptr, info_ptr,
+ &png_ptr->unknown_chunk, 1);
+ }
+ }
+
+ else
#endif
- png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
- png_free(png_ptr, png_ptr->unknown_chunk.data);
- png_ptr->unknown_chunk.data = NULL;
+ png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
+
+ png_free(png_ptr, png_ptr->unknown_chunk.data);
+ png_ptr->unknown_chunk.data = NULL;
}
+
else
#endif
skip = length;
png_crc_finish(png_ptr, skip);
#ifndef PNG_READ_USER_CHUNKS_SUPPORTED
- info_ptr = info_ptr; /* Quiet compiler warnings about unused info_ptr */
+ PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */
#endif
}
/* This function is called to verify that a chunk name is valid.
- This function can't have the "critical chunk check" incorporated
- into it, since in the future we will need to be able to call user
- functions to handle unknown critical chunks after we check that
- the chunk name itself is valid. */
+ * This function can't have the "critical chunk check" incorporated
+ * into it, since in the future we will need to be able to call user
+ * functions to handle unknown critical chunks after we check that
+ * the chunk name itself is valid.
+ */
#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
void /* PRIVATE */
-png_check_chunk_name(png_structp png_ptr, png_bytep chunk_name)
+png_check_chunk_name(png_structp png_ptr, png_const_bytep chunk_name)
{
png_debug(1, "in png_check_chunk_name");
if (isnonalpha(chunk_name[0]) || isnonalpha(chunk_name[1]) ||
}
/* Combines the row recently read in with the existing pixels in the
- row. This routine takes care of alpha and transparency if requested.
- This routine also handles the two methods of progressive display
- of interlaced images, depending on the mask value.
- The mask value describes which pixels are to be combined with
- the row. The pattern always repeats every 8 pixels, so just 8
- bits are needed. A one indicates the pixel is to be combined,
- a zero indicates the pixel is to be skipped. This is in addition
- to any alpha or transparency value associated with the pixel. If
- you want all pixels to be combined, pass 0xff (255) in mask. */
+ * row. This routine takes care of alpha and transparency if requested.
+ * This routine also handles the two methods of progressive display
+ * of interlaced images, depending on the mask value.
+ * The mask value describes which pixels are to be combined with
+ * the row. The pattern always repeats every 8 pixels, so just 8
+ * bits are needed. A one indicates the pixel is to be combined,
+ * a zero indicates the pixel is to be skipped. This is in addition
+ * to any alpha or transparency value associated with the pixel. If
+ * you want all pixels to be combined, pass 0xff (255) in mask.
+ */
void /* PRIVATE */
png_combine_row(png_structp png_ptr, png_bytep row, int mask)
{
png_debug(1, "in png_combine_row");
+
if (mask == 0xff)
{
png_memcpy(row, png_ptr->row_buf + 1,
- PNG_ROWBYTES(png_ptr->row_info.pixel_depth, png_ptr->width));
+ PNG_ROWBYTES(png_ptr->row_info.pixel_depth, png_ptr->width));
}
+
else
{
switch (png_ptr->row_info.pixel_depth)
s_end = 7;
s_inc = 1;
}
+
else
#endif
{
sp++;
dp++;
}
+
else
shift += s_inc;
if (m == 1)
m = 0x80;
+
else
m >>= 1;
}
break;
}
+
case 2:
{
png_bytep sp = png_ptr->row_buf + 1;
s_end = 6;
s_inc = 2;
}
+
else
#endif
{
sp++;
dp++;
}
+
else
shift += s_inc;
+
if (m == 1)
m = 0x80;
+
else
m >>= 1;
}
break;
}
+
case 4:
{
png_bytep sp = png_ptr->row_buf + 1;
s_end = 4;
s_inc = 4;
}
+
else
#endif
{
sp++;
dp++;
}
+
else
shift += s_inc;
+
if (m == 1)
m = 0x80;
+
else
m >>= 1;
}
break;
}
+
default:
{
png_bytep sp = png_ptr->row_buf + 1;
png_uint_32 row_width = png_ptr->width;
png_byte m = 0x80;
-
for (i = 0; i < row_width; i++)
{
if (m & mask)
if (m == 1)
m = 0x80;
+
else
m >>= 1;
}
}
#ifdef PNG_READ_INTERLACING_SUPPORTED
-/* OLD pre-1.0.9 interface:
-void png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
- png_uint_32 transformations)
- */
void /* PRIVATE */
png_do_read_interlace(png_structp png_ptr)
{
s_end = 0;
s_inc = -1;
}
+
else
#endif
{
{
*dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff);
*dp |= (png_byte)(v << dshift);
+
if (dshift == s_end)
{
dshift = s_start;
dp--;
}
+
else
dshift += s_inc;
}
+
if (sshift == s_end)
{
sshift = s_start;
sp--;
}
+
else
sshift += s_inc;
}
break;
}
+
case 2:
{
png_bytep sp = row + (png_uint_32)((row_info->width - 1) >> 2);
s_end = 0;
s_inc = -2;
}
+
else
#endif
{
{
*dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff);
*dp |= (png_byte)(v << dshift);
+
if (dshift == s_end)
{
dshift = s_start;
dp--;
}
+
else
dshift += s_inc;
}
+
if (sshift == s_end)
{
sshift = s_start;
sp--;
}
+
else
sshift += s_inc;
}
break;
}
+
case 4:
{
png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 1);
s_end = 0;
s_inc = -4;
}
+
else
#endif
{
{
*dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff);
*dp |= (png_byte)(v << dshift);
+
if (dshift == s_end)
{
dshift = s_start;
dp--;
}
+
else
dshift += s_inc;
}
+
if (sshift == s_end)
{
sshift = s_start;
sp--;
}
+
else
sshift += s_inc;
}
default:
{
png_size_t pixel_bytes = (row_info->pixel_depth >> 3);
+
png_bytep sp = row + (png_size_t)(row_info->width - 1)
* pixel_bytes;
+
png_bytep dp = row + (png_size_t)(final_width - 1) * pixel_bytes;
int jstop = png_pass_inc[pass];
int j;
png_memcpy(v, sp, pixel_bytes);
+
for (j = 0; j < jstop; j++)
{
png_memcpy(dp, v, pixel_bytes);
dp -= pixel_bytes;
}
+
sp -= pixel_bytes;
}
break;
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, final_width);
}
#ifndef PNG_READ_PACKSWAP_SUPPORTED
- transformations = transformations; /* Silence compiler warning */
+ PNG_UNUSED(transformations) /* Silence compiler warning */
#endif
}
#endif /* PNG_READ_INTERLACING_SUPPORTED */
void /* PRIVATE */
png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row,
- png_bytep prev_row, int filter)
+ png_const_bytep prev_row, int filter)
{
png_debug(1, "in png_read_filter_row");
- png_debug2(2, "row = %lu, filter = %d", png_ptr->row_number, filter);
+ png_debug2(2, "row = %u, filter = %d", png_ptr->row_number, filter);
switch (filter)
{
case PNG_FILTER_VALUE_NONE:
break;
+
case PNG_FILTER_VALUE_SUB:
{
- png_uint_32 i;
- png_uint_32 istop = row_info->rowbytes;
- png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
+ unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
png_bytep rp = row + bpp;
png_bytep lp = row;
}
case PNG_FILTER_VALUE_UP:
{
- png_uint_32 i;
- png_uint_32 istop = row_info->rowbytes;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
png_bytep rp = row;
- png_bytep pp = prev_row;
+ png_const_bytep pp = prev_row;
for (i = 0; i < istop; i++)
{
}
case PNG_FILTER_VALUE_AVG:
{
- png_uint_32 i;
+ png_size_t i;
png_bytep rp = row;
- png_bytep pp = prev_row;
+ png_const_bytep pp = prev_row;
png_bytep lp = row;
- png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
- png_uint_32 istop = row_info->rowbytes - bpp;
+ unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
+ png_size_t istop = row_info->rowbytes - bpp;
for (i = 0; i < bpp; i++)
{
*rp = (png_byte)(((int)(*rp) +
- ((int)(*pp++) / 2 )) & 0xff);
+ ((int)(*pp++) / 2 )) & 0xff);
+
rp++;
}
for (i = 0; i < istop; i++)
{
*rp = (png_byte)(((int)(*rp) +
- (int)(*pp++ + *lp++) / 2 ) & 0xff);
+ (int)(*pp++ + *lp++) / 2 ) & 0xff);
+
rp++;
}
break;
}
case PNG_FILTER_VALUE_PAETH:
{
- png_uint_32 i;
+ png_size_t i;
png_bytep rp = row;
- png_bytep pp = prev_row;
+ png_const_bytep pp = prev_row;
png_bytep lp = row;
- png_bytep cp = prev_row;
- png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
- png_uint_32 istop=row_info->rowbytes - bpp;
+ png_const_bytep cp = prev_row;
+ unsigned int bpp = (row_info->pixel_depth + 7) >> 3;
+ png_size_t istop=row_info->rowbytes - bpp;
for (i = 0; i < bpp; i++)
{
/*
if (pa <= pb && pa <= pc)
p = a;
+
else if (pb <= pc)
p = b;
+
else
p = c;
*/
break;
}
default:
- png_warning(png_ptr, "Ignoring bad adaptive filter type");
- *row = 0;
+ png_error(png_ptr, "Ignoring bad adaptive filter type");
+ /*NOT REACHED */
break;
}
}
if (png_ptr->interlaced)
{
png_ptr->row_number = 0;
- png_memset(png_ptr->prev_row, 0,
- png_ptr->rowbytes + 1);
+
+ png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
+
do
{
png_ptr->pass++;
+
if (png_ptr->pass >= 7)
break;
+
png_ptr->iwidth = (png_ptr->width +
png_pass_inc[png_ptr->pass] - 1 -
png_pass_start[png_ptr->pass]) /
if (!(png_ptr->transformations & PNG_INTERLACE))
{
png_ptr->num_rows = (png_ptr->height +
- png_pass_yinc[png_ptr->pass] - 1 -
- png_pass_ystart[png_ptr->pass]) /
- png_pass_yinc[png_ptr->pass];
- if (!(png_ptr->num_rows))
- continue;
+ png_pass_yinc[png_ptr->pass] - 1 -
+ png_pass_ystart[png_ptr->pass]) /
+ png_pass_yinc[png_ptr->pass];
}
+
else /* if (png_ptr->transformations & PNG_INTERLACE) */
- break;
- } while (png_ptr->iwidth == 0);
+ break; /* libpng deinterlacing sees every row */
+
+ } while (png_ptr->num_rows == 0 || png_ptr->iwidth == 0);
if (png_ptr->pass < 7)
return;
png_ptr->zstream.next_out = (Byte *)&extra;
png_ptr->zstream.avail_out = (uInt)1;
+
for (;;)
{
if (!(png_ptr->zstream.avail_in))
{
while (!png_ptr->idat_size)
{
- png_byte chunk_length[4];
-
png_crc_finish(png_ptr, 0);
-
- png_read_data(png_ptr, chunk_length, 4);
- png_ptr->idat_size = png_get_uint_31(png_ptr, chunk_length);
- png_reset_crc(png_ptr);
- png_crc_read(png_ptr, png_ptr->chunk_name, 4);
+ png_ptr->idat_size = png_read_chunk_header(png_ptr);
if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
png_error(png_ptr, "Not enough image data");
-
}
+
png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size;
png_ptr->zstream.next_in = png_ptr->zbuf;
+
if (png_ptr->zbuf_size > png_ptr->idat_size)
png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size;
+
png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zstream.avail_in);
png_ptr->idat_size -= png_ptr->zstream.avail_in;
}
+
ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
+
if (ret == Z_STREAM_END)
{
if (!(png_ptr->zstream.avail_out) || png_ptr->zstream.avail_in ||
- png_ptr->idat_size)
+ png_ptr->idat_size)
png_warning(png_ptr, "Extra compressed data");
+
png_ptr->mode |= PNG_AFTER_IDAT;
png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
break;
}
+
if (ret != Z_OK)
png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg :
- "Decompression Error");
+ "Decompression Error");
if (!(png_ptr->zstream.avail_out))
{
{
if (!(png_ptr->transformations & PNG_INTERLACE))
png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
- png_pass_ystart[0]) / png_pass_yinc[0];
+ png_pass_ystart[0]) / png_pass_yinc[0];
+
else
png_ptr->num_rows = png_ptr->height;
png_ptr->iwidth = (png_ptr->width +
- png_pass_inc[png_ptr->pass] - 1 -
- png_pass_start[png_ptr->pass]) /
- png_pass_inc[png_ptr->pass];
+ png_pass_inc[png_ptr->pass] - 1 -
+ png_pass_start[png_ptr->pass]) /
+ png_pass_inc[png_ptr->pass];
}
+
else
#endif /* PNG_READ_INTERLACING_SUPPORTED */
{
png_ptr->num_rows = png_ptr->height;
png_ptr->iwidth = png_ptr->width;
}
+
max_pixel_depth = png_ptr->pixel_depth;
#ifdef PNG_READ_PACK_SUPPORTED
{
if (png_ptr->num_trans)
max_pixel_depth = 32;
+
else
max_pixel_depth = 24;
}
+
else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
{
if (max_pixel_depth < 8)
max_pixel_depth = 8;
+
if (png_ptr->num_trans)
max_pixel_depth *= 2;
}
+
else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
{
if (png_ptr->num_trans)
}
#endif
+#ifdef PNG_READ_EXPAND_16_SUPPORTED
+ if (png_ptr->transformations & PNG_EXPAND_16)
+ {
+# ifdef PNG_READ_EXPAND_SUPPORTED
+ /* In fact it is an error if it isn't supported, but checking is
+ * the safe way.
+ */
+ if (png_ptr->transformations & PNG_EXPAND)
+ {
+ if (png_ptr->bit_depth < 16)
+ max_pixel_depth *= 2;
+ }
+ else
+# endif
+ png_ptr->transformations &= ~PNG_EXPAND_16;
+ }
+#endif
+
#ifdef PNG_READ_FILLER_SUPPORTED
if (png_ptr->transformations & (PNG_FILLER))
{
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
max_pixel_depth = 32;
+
else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
{
if (max_pixel_depth <= 8)
max_pixel_depth = 16;
+
else
max_pixel_depth = 32;
}
+
else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
{
if (max_pixel_depth <= 32)
max_pixel_depth = 32;
+
else
max_pixel_depth = 64;
}
{
if (
#ifdef PNG_READ_EXPAND_SUPPORTED
- (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) ||
+ (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) ||
#endif
#ifdef PNG_READ_FILLER_SUPPORTED
- (png_ptr->transformations & (PNG_FILLER)) ||
+ (png_ptr->transformations & (PNG_FILLER)) ||
#endif
- png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
{
if (max_pixel_depth <= 16)
max_pixel_depth = 32;
+
else
max_pixel_depth = 64;
}
+
else
{
if (max_pixel_depth <= 8)
- {
- if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ {
+ if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
max_pixel_depth = 32;
- else
+
+ else
max_pixel_depth = 24;
- }
+ }
+
else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
max_pixel_depth = 64;
+
else
max_pixel_depth = 48;
}
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) && \
defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
if (png_ptr->transformations & PNG_USER_TRANSFORM)
- {
- int user_pixel_depth = png_ptr->user_transform_depth*
+ {
+ int user_pixel_depth = png_ptr->user_transform_depth*
png_ptr->user_transform_channels;
- if (user_pixel_depth > max_pixel_depth)
+
+ if (user_pixel_depth > max_pixel_depth)
max_pixel_depth=user_pixel_depth;
- }
+ }
#endif
/* Align the width on the next larger 8 pixels. Mainly used
* for safety's sake
*/
row_bytes = PNG_ROWBYTES(max_pixel_depth, row_bytes) +
- 1 + ((max_pixel_depth + 7) >> 3);
+ 1 + ((max_pixel_depth + 7) >> 3);
+
#ifdef PNG_MAX_MALLOC_64K
if (row_bytes > (png_uint_32)65536L)
png_error(png_ptr, "This image requires a row greater than 64KB");
if (row_bytes + 48 > png_ptr->old_big_row_buf_size)
{
png_free(png_ptr, png_ptr->big_row_buf);
+
if (png_ptr->interlaced)
png_ptr->big_row_buf = (png_bytep)png_calloc(png_ptr,
row_bytes + 48);
+
else
png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr,
row_bytes + 48);
+
png_ptr->old_big_row_buf_size = row_bytes + 48;
#ifdef PNG_ALIGNED_MEMORY_SUPPORTED
/* Use 16-byte aligned memory for row_buf with at least 16 bytes
* of padding before and after row_buf.
*/
- png_ptr->row_buf = png_ptr->big_row_buf + 32
- - (((png_alloc_size_t)&(png_ptr->big_row_buf[0]) + 15) % 16);
+ png_ptr->row_buf = png_ptr->big_row_buf + 32 -
+ (((png_alloc_size_t)png_ptr->big_row_buf + 15) & 0x0F);
+
png_ptr->old_big_row_buf_size = row_bytes + 48;
#else
/* Use 32 bytes of padding before and 16 bytes after row_buf. */
}
#ifdef PNG_MAX_MALLOC_64K
- if ((png_uint_32)png_ptr->rowbytes + 1 > (png_uint_32)65536L)
+ if (png_ptr->rowbytes > 65535)
png_error(png_ptr, "This image requires a row greater than 64KB");
+
#endif
- if ((png_uint_32)png_ptr->rowbytes > (png_uint_32)(PNG_SIZE_MAX - 1))
+ if (png_ptr->rowbytes > (PNG_SIZE_MAX - 1))
png_error(png_ptr, "Row has too many bytes to allocate in memory");
if (png_ptr->rowbytes + 1 > png_ptr->old_prev_row_size)
{
png_free(png_ptr, png_ptr->prev_row);
- png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)(
- png_ptr->rowbytes + 1));
+
+ png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, png_ptr->rowbytes + 1);
+
png_ptr->old_prev_row_size = png_ptr->rowbytes + 1;
}
png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1);
- png_debug1(3, "width = %lu,", png_ptr->width);
- png_debug1(3, "height = %lu,", png_ptr->height);
- png_debug1(3, "iwidth = %lu,", png_ptr->iwidth);
- png_debug1(3, "num_rows = %lu,", png_ptr->num_rows);
- png_debug1(3, "rowbytes = %lu,", png_ptr->rowbytes);
+ png_debug1(3, "width = %u,", png_ptr->width);
+ png_debug1(3, "height = %u,", png_ptr->height);
+ png_debug1(3, "iwidth = %u,", png_ptr->iwidth);
+ png_debug1(3, "num_rows = %u,", png_ptr->num_rows);
+ png_debug1(3, "rowbytes = %lu,", (unsigned long)png_ptr->rowbytes);
png_debug1(3, "irowbytes = %lu",
- PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1);
+ (unsigned long)PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1);
png_ptr->flags |= PNG_FLAG_ROW_INIT;
}
/* pngset.c - storage of image information into info struct
*
- * Last changed in libpng 1.4.1 [February 25, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* info struct and allows us to change the structure in the future.
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#include "pngpriv.h"
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
#ifdef PNG_bKGD_SUPPORTED
void PNGAPI
-png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
+png_set_bKGD(png_structp png_ptr, png_infop info_ptr,
+ png_const_color_16p background)
{
png_debug1(1, "in %s storage function", "bKGD");
#endif
#ifdef PNG_cHRM_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-void PNGAPI
-png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
- double white_x, double white_y, double red_x, double red_y,
- double green_x, double green_y, double blue_x, double blue_y)
-{
- png_debug1(1, "in %s storage function", "cHRM");
-
- if (png_ptr == NULL || info_ptr == NULL)
- return;
-
- info_ptr->x_white = (float)white_x;
- info_ptr->y_white = (float)white_y;
- info_ptr->x_red = (float)red_x;
- info_ptr->y_red = (float)red_y;
- info_ptr->x_green = (float)green_x;
- info_ptr->y_green = (float)green_y;
- info_ptr->x_blue = (float)blue_x;
- info_ptr->y_blue = (float)blue_y;
-#ifdef PNG_FIXED_POINT_SUPPORTED
- info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
- info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
- info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5);
- info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5);
- info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
- info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
- info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5);
- info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5);
-#endif
- info_ptr->valid |= PNG_INFO_cHRM;
-}
-#endif /* PNG_FLOATING_POINT_SUPPORTED */
-
-#ifdef PNG_FIXED_POINT_SUPPORTED
-void PNGAPI
+void PNGFAPI
png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
- png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
- png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
- png_fixed_point blue_x, png_fixed_point blue_y)
+ png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
+ png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
+ png_fixed_point blue_x, png_fixed_point blue_y)
{
png_debug1(1, "in %s storage function", "cHRM fixed");
if (png_ptr == NULL || info_ptr == NULL)
return;
-#ifdef PNG_CHECK_cHRM_SUPPORTED
+# ifdef PNG_CHECK_cHRM_SUPPORTED
if (png_check_cHRM_fixed(png_ptr,
- white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
-#endif
+ white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
+# endif
{
- info_ptr->int_x_white = white_x;
- info_ptr->int_y_white = white_y;
- info_ptr->int_x_red = red_x;
- info_ptr->int_y_red = red_y;
- info_ptr->int_x_green = green_x;
- info_ptr->int_y_green = green_y;
- info_ptr->int_x_blue = blue_x;
- info_ptr->int_y_blue = blue_y;
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- info_ptr->x_white = (float)(white_x/100000.);
- info_ptr->y_white = (float)(white_y/100000.);
- info_ptr->x_red = (float)( red_x/100000.);
- info_ptr->y_red = (float)( red_y/100000.);
- info_ptr->x_green = (float)(green_x/100000.);
- info_ptr->y_green = (float)(green_y/100000.);
- info_ptr->x_blue = (float)( blue_x/100000.);
- info_ptr->y_blue = (float)( blue_y/100000.);
-#endif
+ info_ptr->x_white = white_x;
+ info_ptr->y_white = white_y;
+ info_ptr->x_red = red_x;
+ info_ptr->y_red = red_y;
+ info_ptr->x_green = green_x;
+ info_ptr->y_green = green_y;
+ info_ptr->x_blue = blue_x;
+ info_ptr->y_blue = blue_y;
info_ptr->valid |= PNG_INFO_cHRM;
}
}
-#endif /* PNG_FIXED_POINT_SUPPORTED */
-#endif /* PNG_cHRM_SUPPORTED */
-#ifdef PNG_gAMA_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
+# ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
-png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
+png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
+ double white_x, double white_y, double red_x, double red_y,
+ double green_x, double green_y, double blue_x, double blue_y)
{
- double png_gamma;
-
- png_debug1(1, "in %s storage function", "gAMA");
+ png_set_cHRM_fixed(png_ptr, info_ptr,
+ png_fixed(png_ptr, white_x, "cHRM White X"),
+ png_fixed(png_ptr, white_y, "cHRM White Y"),
+ png_fixed(png_ptr, red_x, "cHRM Red X"),
+ png_fixed(png_ptr, red_y, "cHRM Red Y"),
+ png_fixed(png_ptr, green_x, "cHRM Green X"),
+ png_fixed(png_ptr, green_y, "cHRM Green Y"),
+ png_fixed(png_ptr, blue_x, "cHRM Blue X"),
+ png_fixed(png_ptr, blue_y, "cHRM Blue Y"));
+}
+# endif /* PNG_FLOATING_POINT_SUPPORTED */
- if (png_ptr == NULL || info_ptr == NULL)
- return;
+#endif /* PNG_cHRM_SUPPORTED */
- /* Check for overflow */
- if (file_gamma > 21474.83)
- {
- png_warning(png_ptr, "Limiting gamma to 21474.83");
- png_gamma=21474.83;
- }
- else
- png_gamma = file_gamma;
- info_ptr->gamma = (float)png_gamma;
-#ifdef PNG_FIXED_POINT_SUPPORTED
- info_ptr->int_gamma = (int)(png_gamma*100000.+.5);
-#endif
- info_ptr->valid |= PNG_INFO_gAMA;
- if (png_gamma == 0.0)
- png_warning(png_ptr, "Setting gamma=0");
-}
-#endif
-void PNGAPI
+#ifdef PNG_gAMA_SUPPORTED
+void PNGFAPI
png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
- int_gamma)
+ file_gamma)
{
- png_fixed_point png_gamma;
-
png_debug1(1, "in %s storage function", "gAMA");
if (png_ptr == NULL || info_ptr == NULL)
return;
- if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX)
- {
- png_warning(png_ptr, "Limiting gamma to 21474.83");
- png_gamma=PNG_UINT_31_MAX;
- }
+ /* Previously these values were limited, however they must be
+ * wrong, therefore storing them (and setting PNG_INFO_gAMA)
+ * must be wrong too.
+ */
+ if (file_gamma > (png_fixed_point)PNG_UINT_31_MAX)
+ png_warning(png_ptr, "Gamma too large, ignored");
+
+ else if (file_gamma <= 0)
+ png_warning(png_ptr, "Negative or zero gamma ignored");
+
else
{
- if (int_gamma < 0)
- {
- png_warning(png_ptr, "Setting negative gamma to zero");
- png_gamma = 0;
- }
- else
- png_gamma = int_gamma;
+ info_ptr->gamma = file_gamma;
+ info_ptr->valid |= PNG_INFO_gAMA;
}
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- info_ptr->gamma = (float)(png_gamma/100000.);
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
- info_ptr->int_gamma = png_gamma;
-#endif
- info_ptr->valid |= PNG_INFO_gAMA;
- if (png_gamma == 0)
- png_warning(png_ptr, "Setting gamma=0");
}
+
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+void PNGAPI
+png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
+{
+ png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma,
+ "png_set_gAMA"));
+}
+# endif
#endif
#ifdef PNG_hIST_SUPPORTED
void PNGAPI
-png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
+png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist)
{
int i;
> PNG_MAX_PALETTE_LENGTH)
{
png_warning(png_ptr,
- "Invalid palette size, hIST allocation skipped");
+ "Invalid palette size, hIST allocation skipped");
+
return;
}
png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
+
/* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
* version 1.2.1
*/
png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
- PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16));
+ PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16));
+
if (png_ptr->hist == NULL)
{
png_warning(png_ptr, "Insufficient memory for hIST chunk data");
for (i = 0; i < info_ptr->num_palette; i++)
png_ptr->hist[i] = hist[i];
+
info_ptr->hist = png_ptr->hist;
info_ptr->valid |= PNG_INFO_hIST;
-
info_ptr->free_me |= PNG_FREE_HIST;
}
#endif
void PNGAPI
png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 width, png_uint_32 height, int bit_depth,
- int color_type, int interlace_type, int compression_type,
- int filter_type)
+ png_uint_32 width, png_uint_32 height, int bit_depth,
+ int color_type, int interlace_type, int compression_type,
+ int filter_type)
{
png_debug1(1, "in %s storage function", "IHDR");
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
info_ptr->channels = 1;
+
else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
info_ptr->channels = 3;
+
else
info_ptr->channels = 1;
+
if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
info_ptr->channels++;
+
info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
/* Check for potential overflow */
- if (width > (PNG_UINT_32_MAX
- >> 3) /* 8-byte RGBA pixels */
- - 64 /* bigrowbuf hack */
- - 1 /* filter byte */
- - 7*8 /* rounding of width to multiple of 8 pixels */
- - 8) /* extra max_pixel_depth pad */
+ if (width >
+ (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */
+ - 48 /* bigrowbuf hack */
+ - 1 /* filter byte */
+ - 7*8 /* rounding of width to multiple of 8 pixels */
+ - 8) /* extra max_pixel_depth pad */
info_ptr->rowbytes = 0;
else
info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
#ifdef PNG_oFFs_SUPPORTED
void PNGAPI
png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
- png_int_32 offset_x, png_int_32 offset_y, int unit_type)
+ png_int_32 offset_x, png_int_32 offset_y, int unit_type)
{
png_debug1(1, "in %s storage function", "oFFs");
#ifdef PNG_pCAL_SUPPORTED
void PNGAPI
png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
- png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
- png_charp units, png_charpp params)
+ png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
+ int nparams, png_const_charp units, png_charpp params)
{
png_size_t length;
int i;
length = png_strlen(purpose) + 1;
png_debug1(3, "allocating purpose for info (%lu bytes)",
- (unsigned long)length);
+ (unsigned long)length);
+
+ /* TODO: validate format of calibration name and unit name */
+
+ /* Check that the type matches the specification. */
+ if (type < 0 || type > 3)
+ png_error(png_ptr, "Invalid pCAL equation type");
+
+ /* Validate params[nparams] */
+ for (i=0; i<nparams; ++i)
+ if (!png_check_fp_string(params[i], png_strlen(params[i])))
+ png_error(png_ptr, "Invalid format for pCAL parameter");
+
info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
+
if (info_ptr->pcal_purpose == NULL)
{
png_warning(png_ptr, "Insufficient memory for pCAL purpose");
return;
}
+
png_memcpy(info_ptr->pcal_purpose, purpose, length);
png_debug(3, "storing X0, X1, type, and nparams in info");
length = png_strlen(units) + 1;
png_debug1(3, "allocating units for info (%lu bytes)",
(unsigned long)length);
+
info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
+
if (info_ptr->pcal_units == NULL)
{
png_warning(png_ptr, "Insufficient memory for pCAL units");
return;
}
+
png_memcpy(info_ptr->pcal_units, units, length);
info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
- (png_size_t)((nparams + 1) * png_sizeof(png_charp)));
+ (png_size_t)((nparams + 1) * png_sizeof(png_charp)));
+
if (info_ptr->pcal_params == NULL)
{
png_warning(png_ptr, "Insufficient memory for pCAL params");
{
length = png_strlen(params[i]) + 1;
png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
- (unsigned long)length);
+ (unsigned long)length);
+
info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
+
if (info_ptr->pcal_params[i] == NULL)
{
png_warning(png_ptr, "Insufficient memory for pCAL parameter");
return;
}
+
png_memcpy(info_ptr->pcal_params[i], params[i], length);
}
}
#endif
-#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
-#ifdef PNG_FLOATING_POINT_SUPPORTED
+#ifdef PNG_sCAL_SUPPORTED
void PNGAPI
-png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
- int unit, double width, double height)
+png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
+ int unit, png_const_charp swidth, png_const_charp sheight)
{
+ png_size_t lengthw = 0, lengthh = 0;
+
png_debug1(1, "in %s storage function", "sCAL");
if (png_ptr == NULL || info_ptr == NULL)
return;
- info_ptr->scal_unit = (png_byte)unit;
- info_ptr->scal_pixel_width = width;
- info_ptr->scal_pixel_height = height;
-
- info_ptr->valid |= PNG_INFO_sCAL;
-}
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
-void PNGAPI
-png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
- int unit, png_charp swidth, png_charp sheight)
-{
- png_size_t length;
+ /* Double check the unit (should never get here with an invalid
+ * unit unless this is an API call.)
+ */
+ if (unit != 1 && unit != 2)
+ png_error(png_ptr, "Invalid sCAL unit");
- png_debug1(1, "in %s storage function", "sCAL");
+ if (swidth == NULL || (lengthw = png_strlen(swidth)) <= 0 ||
+ swidth[0] == 45 /*'-'*/ || !png_check_fp_string(swidth, lengthw))
+ png_error(png_ptr, "Invalid sCAL width");
- if (png_ptr == NULL || info_ptr == NULL)
- return;
+ if (sheight == NULL || (lengthh = png_strlen(sheight)) <= 0 ||
+ sheight[0] == 45 /*'-'*/ || !png_check_fp_string(sheight, lengthh))
+ png_error(png_ptr, "Invalid sCAL height");
info_ptr->scal_unit = (png_byte)unit;
- length = png_strlen(swidth) + 1;
- png_debug1(3, "allocating unit for info (%u bytes)",
- (unsigned int)length);
- info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
+ ++lengthw;
+
+ png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw);
+
+ info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw);
+
if (info_ptr->scal_s_width == NULL)
{
- png_warning(png_ptr,
- "Memory allocation failed while processing sCAL");
+ png_warning(png_ptr, "Memory allocation failed while processing sCAL");
return;
}
- png_memcpy(info_ptr->scal_s_width, swidth, length);
- length = png_strlen(sheight) + 1;
- png_debug1(3, "allocating unit for info (%u bytes)",
- (unsigned int)length);
- info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
+ png_memcpy(info_ptr->scal_s_width, swidth, lengthw);
+
+ ++lengthh;
+
+ png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh);
+
+ info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh);
+
if (info_ptr->scal_s_height == NULL)
{
png_free (png_ptr, info_ptr->scal_s_width);
info_ptr->scal_s_width = NULL;
- png_warning(png_ptr,
- "Memory allocation failed while processing sCAL");
+
+ png_warning(png_ptr, "Memory allocation failed while processing sCAL");
return;
}
- png_memcpy(info_ptr->scal_s_height, sheight, length);
+
+ png_memcpy(info_ptr->scal_s_height, sheight, lengthh);
+
info_ptr->valid |= PNG_INFO_sCAL;
info_ptr->free_me |= PNG_FREE_SCAL;
}
-#endif
-#endif
+
+# ifdef PNG_FLOATING_POINT_SUPPORTED
+void PNGAPI
+png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width,
+ double height)
+{
+ png_debug1(1, "in %s storage function", "sCAL");
+
+ /* Check the arguments. */
+ if (width <= 0)
+ png_warning(png_ptr, "Invalid sCAL width ignored");
+
+ else if (height <= 0)
+ png_warning(png_ptr, "Invalid sCAL height ignored");
+
+ else
+ {
+ /* Convert 'width' and 'height' to ASCII. */
+ char swidth[PNG_sCAL_MAX_DIGITS+1];
+ char sheight[PNG_sCAL_MAX_DIGITS+1];
+
+ png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width,
+ PNG_sCAL_PRECISION);
+ png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height,
+ PNG_sCAL_PRECISION);
+
+ png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
+ }
+}
+# endif
+
+# ifdef PNG_FIXED_POINT_SUPPORTED
+void PNGAPI
+png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit,
+ png_fixed_point width, png_fixed_point height)
+{
+ png_debug1(1, "in %s storage function", "sCAL");
+
+ /* Check the arguments. */
+ if (width <= 0)
+ png_warning(png_ptr, "Invalid sCAL width ignored");
+
+ else if (height <= 0)
+ png_warning(png_ptr, "Invalid sCAL height ignored");
+
+ else
+ {
+ /* Convert 'width' and 'height' to ASCII. */
+ char swidth[PNG_sCAL_MAX_DIGITS+1];
+ char sheight[PNG_sCAL_MAX_DIGITS+1];
+
+ png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width);
+ png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height);
+
+ png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight);
+ }
+}
+# endif
#endif
#ifdef PNG_pHYs_SUPPORTED
void PNGAPI
png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
- png_uint_32 res_x, png_uint_32 res_y, int unit_type)
+ png_uint_32 res_x, png_uint_32 res_y, int unit_type)
{
png_debug1(1, "in %s storage function", "pHYs");
void PNGAPI
png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
- png_colorp palette, int num_palette)
+ png_const_colorp palette, int num_palette)
{
png_debug1(1, "in %s storage function", "PLTE");
{
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
png_error(png_ptr, "Invalid palette length");
+
else
{
png_warning(png_ptr, "Invalid palette length");
* too-large sample values.
*/
png_ptr->palette = (png_colorp)png_calloc(png_ptr,
- PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
+ PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
+
png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
info_ptr->palette = png_ptr->palette;
info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
#ifdef PNG_sBIT_SUPPORTED
void PNGAPI
png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
- png_color_8p sig_bit)
+ png_const_color_8p sig_bit)
{
png_debug1(1, "in %s storage function", "sBIT");
#ifdef PNG_sRGB_SUPPORTED
void PNGAPI
-png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
+png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent)
{
png_debug1(1, "in %s storage function", "sRGB");
if (png_ptr == NULL || info_ptr == NULL)
return;
- info_ptr->srgb_intent = (png_byte)intent;
+ info_ptr->srgb_intent = (png_byte)srgb_intent;
info_ptr->valid |= PNG_INFO_sRGB;
}
void PNGAPI
png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
- int intent)
+ int srgb_intent)
{
-#ifdef PNG_gAMA_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- float file_gamma;
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
- png_fixed_point int_file_gamma;
-#endif
-#endif
-#ifdef PNG_cHRM_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
-#endif
- png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
- int_green_y, int_blue_x, int_blue_y;
-#endif
png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
if (png_ptr == NULL || info_ptr == NULL)
return;
- png_set_sRGB(png_ptr, info_ptr, intent);
+ png_set_sRGB(png_ptr, info_ptr, srgb_intent);
-#ifdef PNG_gAMA_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- file_gamma = (float).45455;
- png_set_gAMA(png_ptr, info_ptr, file_gamma);
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
- int_file_gamma = 45455L;
- png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
-#endif
-#endif
+# ifdef PNG_gAMA_SUPPORTED
+ png_set_gAMA_fixed(png_ptr, info_ptr, 45455L);
+# endif
-#ifdef PNG_cHRM_SUPPORTED
- int_white_x = 31270L;
- int_white_y = 32900L;
- int_red_x = 64000L;
- int_red_y = 33000L;
- int_green_x = 30000L;
- int_green_y = 60000L;
- int_blue_x = 15000L;
- int_blue_y = 6000L;
-
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- white_x = (float).3127;
- white_y = (float).3290;
- red_x = (float).64;
- red_y = (float).33;
- green_x = (float).30;
- green_y = (float).60;
- blue_x = (float).15;
- blue_y = (float).06;
-#endif
-
-#ifdef PNG_FIXED_POINT_SUPPORTED
+# ifdef PNG_cHRM_SUPPORTED
png_set_cHRM_fixed(png_ptr, info_ptr,
- int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
- int_green_y, int_blue_x, int_blue_y);
-#endif
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- png_set_cHRM(png_ptr, info_ptr,
- white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
-#endif
-#endif /* cHRM */
+ /* color x y */
+ /* white */ 31270L, 32900L,
+ /* red */ 64000L, 33000L,
+ /* green */ 30000L, 60000L,
+ /* blue */ 15000L, 6000L
+ );
+# endif /* cHRM */
}
#endif /* sRGB */
#ifdef PNG_iCCP_SUPPORTED
void PNGAPI
png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
- png_charp name, int compression_type,
- png_charp profile, png_uint_32 proflen)
+ png_const_charp name, int compression_type,
+ png_const_bytep profile, png_uint_32 proflen)
{
png_charp new_iccp_name;
- png_charp new_iccp_profile;
+ png_bytep new_iccp_profile;
png_uint_32 length;
png_debug1(1, "in %s storage function", "iCCP");
length = png_strlen(name)+1;
new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
+
if (new_iccp_name == NULL)
{
png_warning(png_ptr, "Insufficient memory to process iCCP chunk");
return;
}
+
png_memcpy(new_iccp_name, name, length);
- new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
+ new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen);
+
if (new_iccp_profile == NULL)
{
png_free (png_ptr, new_iccp_name);
"Insufficient memory to process iCCP profile");
return;
}
+
png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
#ifdef PNG_TEXT_SUPPORTED
void PNGAPI
-png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
- int num_text)
+png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr,
+ int num_text)
{
int ret;
ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
+
if (ret)
png_error(png_ptr, "Insufficient memory to store text");
}
int /* PRIVATE */
-png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
- int num_text)
+png_set_text_2(png_structp png_ptr, png_infop info_ptr,
+ png_const_textp text_ptr, int num_text)
{
int i;
png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
- png_ptr->chunk_name[0] == '\0') ?
- "text" : (png_const_charp)png_ptr->chunk_name));
+ png_ptr->chunk_name[0] == '\0') ?
+ "text" : (png_const_charp)png_ptr->chunk_name));
if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
return(0);
old_text = info_ptr->text;
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
(png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
+
if (info_ptr->text == NULL)
{
png_free(png_ptr, old_text);
return(1);
}
+
png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
- png_sizeof(png_text)));
+ png_sizeof(png_text)));
png_free(png_ptr, old_text);
}
+
else
{
info_ptr->max_text = num_text + 8;
info_ptr->num_text = 0;
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
- (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
+ (png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
if (info_ptr->text == NULL)
return(1);
info_ptr->free_me |= PNG_FREE_TEXT;
}
+
png_debug1(3, "allocated %d entries for info_ptr->text",
- info_ptr->max_text);
+ info_ptr->max_text);
}
for (i = 0; i < num_text; i++)
{
if (text_ptr[i].key == NULL)
continue;
+ if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||
+ text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)
+ {
+ png_warning(png_ptr, "text compression mode is out of range");
+ continue;
+ }
+
key_len = png_strlen(text_ptr[i].key);
if (text_ptr[i].compression <= 0)
}
else
-#ifdef PNG_iTXt_SUPPORTED
+# ifdef PNG_iTXt_SUPPORTED
{
/* Set iTXt data */
if (text_ptr[i].lang != NULL)
lang_len = png_strlen(text_ptr[i].lang);
+
else
lang_len = 0;
+
if (text_ptr[i].lang_key != NULL)
lang_key_len = png_strlen(text_ptr[i].lang_key);
+
else
lang_key_len = 0;
}
-#else /* PNG_iTXt_SUPPORTED */
+# else /* PNG_iTXt_SUPPORTED */
{
png_warning(png_ptr, "iTXt chunk not supported");
continue;
}
-#endif
+# endif
if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
{
text_length = 0;
-#ifdef PNG_iTXt_SUPPORTED
+# ifdef PNG_iTXt_SUPPORTED
if (text_ptr[i].compression > 0)
textp->compression = PNG_ITXT_COMPRESSION_NONE;
+
else
-#endif
+# endif
textp->compression = PNG_TEXT_COMPRESSION_NONE;
}
}
textp->key = (png_charp)png_malloc_warn(png_ptr,
- (png_size_t)
- (key_len + text_length + lang_len + lang_key_len + 4));
+ (png_size_t)
+ (key_len + text_length + lang_len + lang_key_len + 4));
+
if (textp->key == NULL)
return(1);
- png_debug2(2, "Allocated %lu bytes at %x in png_set_text",
- (unsigned long)(png_uint_32)
- (key_len + lang_len + lang_key_len + text_length + 4),
- (int)textp->key);
+
+ png_debug2(2, "Allocated %lu bytes at %p in png_set_text",
+ (unsigned long)(png_uint_32)
+ (key_len + lang_len + lang_key_len + text_length + 4),
+ textp->key);
png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
*(textp->key + key_len) = '\0';
-#ifdef PNG_iTXt_SUPPORTED
+
if (text_ptr[i].compression > 0)
{
textp->lang = textp->key + key_len + 1;
*(textp->lang_key + lang_key_len) = '\0';
textp->text = textp->lang_key + lang_key_len + 1;
}
+
else
-#endif
{
-#ifdef PNG_iTXt_SUPPORTED
textp->lang=NULL;
textp->lang_key=NULL;
-#endif
textp->text = textp->key + key_len + 1;
}
+
if (text_length)
png_memcpy(textp->text, text_ptr[i].text,
- (png_size_t)(text_length));
+ (png_size_t)(text_length));
+
*(textp->text + text_length) = '\0';
-#ifdef PNG_iTXt_SUPPORTED
+# ifdef PNG_iTXt_SUPPORTED
if (textp->compression > 0)
{
textp->text_length = 0;
textp->itxt_length = text_length;
}
- else
-#endif
+ else
+# endif
{
textp->text_length = text_length;
-#ifdef PNG_iTXt_SUPPORTED
textp->itxt_length = 0;
-#endif
}
+
info_ptr->num_text++;
png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
}
#ifdef PNG_tIME_SUPPORTED
void PNGAPI
-png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
+png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)
{
png_debug1(1, "in %s storage function", "tIME");
#ifdef PNG_tRNS_SUPPORTED
void PNGAPI
png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
- png_bytep trans_alpha, int num_trans, png_color_16p trans_color)
+ png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)
{
png_debug1(1, "in %s storage function", "tRNS");
png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
/* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
- png_ptr->trans_alpha = info_ptr->trans_alpha = (png_bytep)png_malloc(png_ptr,
- (png_size_t)PNG_MAX_PALETTE_LENGTH);
+ png_ptr->trans_alpha = info_ptr->trans_alpha =
+ (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH);
+
if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans);
}
if (trans_color != NULL)
{
int sample_max = (1 << info_ptr->bit_depth);
+
if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
(int)trans_color->gray > sample_max) ||
(info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
(int)trans_color->blue > sample_max)))
png_warning(png_ptr,
"tRNS chunk has out-of-range samples for bit_depth");
+
png_memcpy(&(info_ptr->trans_color), trans_color,
png_sizeof(png_color_16));
+
if (num_trans == 0)
num_trans = 1;
}
info_ptr->num_trans = (png_uint_16)num_trans;
+
if (num_trans != 0)
{
info_ptr->valid |= PNG_INFO_tRNS;
#ifdef PNG_sPLT_SUPPORTED
void PNGAPI
png_set_sPLT(png_structp png_ptr,
- png_infop info_ptr, png_sPLT_tp entries, int nentries)
+ png_infop info_ptr, png_const_sPLT_tp entries, int nentries)
/*
* entries - array of png_sPLT_t structures
* to be added to the list of palettes
* in the info structure.
+ *
* nentries - number of palette structures to be
* added.
*/
np = (png_sPLT_tp)png_malloc_warn(png_ptr,
(info_ptr->splt_palettes_num + nentries) *
- (png_size_t)png_sizeof(png_sPLT_t));
+ (png_size_t)png_sizeof(png_sPLT_t));
+
if (np == NULL)
{
png_warning(png_ptr, "No memory for sPLT palettes");
png_memcpy(np, info_ptr->splt_palettes,
info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
+
png_free(png_ptr, info_ptr->splt_palettes);
info_ptr->splt_palettes=NULL;
for (i = 0; i < nentries; i++)
{
png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
- png_sPLT_tp from = entries + i;
+ png_const_sPLT_tp from = entries + i;
png_uint_32 length;
length = png_strlen(from->name) + 1;
to->name = (png_charp)png_malloc_warn(png_ptr, (png_size_t)length);
+
if (to->name == NULL)
{
png_warning(png_ptr,
- "Out of memory while processing sPLT chunk");
+ "Out of memory while processing sPLT chunk");
continue;
}
+
png_memcpy(to->name, from->name, length);
to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
(png_size_t)(from->nentries * png_sizeof(png_sPLT_entry)));
+
if (to->entries == NULL)
{
png_warning(png_ptr,
- "Out of memory while processing sPLT chunk");
+ "Out of memory while processing sPLT chunk");
png_free(png_ptr, to->name);
to->name = NULL;
continue;
}
+
png_memcpy(to->entries, from->entries,
from->nentries * png_sizeof(png_sPLT_entry));
+
to->nentries = from->nentries;
to->depth = from->depth;
}
#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
void PNGAPI
png_set_unknown_chunks(png_structp png_ptr,
- png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
+ png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)
{
png_unknown_chunkp np;
int i;
return;
np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
- (png_size_t)((info_ptr->unknown_chunks_num + num_unknowns) *
- png_sizeof(png_unknown_chunk)));
+ (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) *
+ png_sizeof(png_unknown_chunk));
+
if (np == NULL)
{
png_warning(png_ptr,
}
png_memcpy(np, info_ptr->unknown_chunks,
- info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
+ (png_size_t)info_ptr->unknown_chunks_num *
+ png_sizeof(png_unknown_chunk));
+
png_free(png_ptr, info_ptr->unknown_chunks);
info_ptr->unknown_chunks = NULL;
for (i = 0; i < num_unknowns; i++)
{
png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
- png_unknown_chunkp from = unknowns + i;
+ png_const_unknown_chunkp from = unknowns + i;
- png_memcpy((png_charp)to->name, (png_charp)from->name,
- png_sizeof(from->name));
+ png_memcpy(to->name, from->name, png_sizeof(from->name));
to->name[png_sizeof(to->name)-1] = '\0';
to->size = from->size;
+
/* Note our location in the read or write sequence */
to->location = (png_byte)(png_ptr->mode & 0xff);
if (from->size == 0)
to->data=NULL;
+
else
{
to->data = (png_bytep)png_malloc_warn(png_ptr,
- (png_size_t)from->size);
+ (png_size_t)from->size);
+
if (to->data == NULL)
{
png_warning(png_ptr,
- "Out of memory while processing unknown chunk");
+ "Out of memory while processing unknown chunk");
to->size = 0;
}
+
else
png_memcpy(to->data, from->data, from->size);
}
info_ptr->unknown_chunks_num += num_unknowns;
info_ptr->free_me |= PNG_FREE_UNKN;
}
+
void PNGAPI
png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
- int chunk, int location)
+ int chunk, int location)
{
if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
- (int)info_ptr->unknown_chunks_num)
+ info_ptr->unknown_chunks_num)
info_ptr->unknown_chunks[chunk].location = (png_byte)location;
}
#endif
if (png_ptr == NULL)
return (png_uint_32)0;
+
png_ptr->mng_features_permitted =
- (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
+ (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
+
return (png_uint_32)png_ptr->mng_features_permitted;
}
#endif
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
void PNGAPI
-png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
- chunk_list, int num_chunks)
+png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep
+ chunk_list, int num_chunks)
{
png_bytep new_list, p;
int i, old_num_chunks;
if (png_ptr == NULL)
return;
+
if (num_chunks == 0)
{
if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
+
else
png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
if (keep == PNG_HANDLE_CHUNK_ALWAYS)
png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
+
else
png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
+
return;
}
+
if (chunk_list == NULL)
return;
+
old_num_chunks = png_ptr->num_chunk_list;
new_list=(png_bytep)png_malloc(png_ptr,
- (png_size_t)
- (5*(num_chunks + old_num_chunks)));
+ (png_size_t)(5*(num_chunks + old_num_chunks)));
+
if (png_ptr->chunk_list != NULL)
{
png_memcpy(new_list, png_ptr->chunk_list,
png_free(png_ptr, png_ptr->chunk_list);
png_ptr->chunk_list=NULL;
}
+
png_memcpy(new_list + 5*old_num_chunks, chunk_list,
(png_size_t)(5*num_chunks));
+
for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
*p=(png_byte)keep;
+
png_ptr->num_chunk_list = old_num_chunks + num_chunks;
png_ptr->chunk_list = new_list;
png_ptr->free_me |= PNG_FREE_LIST;
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
void PNGAPI
png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
- png_user_chunk_ptr read_user_chunk_fn)
+ png_user_chunk_ptr read_user_chunk_fn)
{
png_debug(1, "in png_set_read_user_chunk_fn");
if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
+
info_ptr->row_pointers = row_pointers;
+
if (row_pointers)
info_ptr->valid |= PNG_INFO_IDAT;
}
#endif
void PNGAPI
-png_set_compression_buffer_size(png_structp png_ptr,
- png_size_t size)
+png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)
{
if (png_ptr == NULL)
return;
+
png_free(png_ptr, png_ptr->zbuf);
- png_ptr->zbuf_size = size;
+
+ if (size > ZLIB_IO_MAX)
+ {
+ png_warning(png_ptr, "Attempt to set buffer size beyond max ignored");
+ png_ptr->zbuf_size = ZLIB_IO_MAX;
+ size = ZLIB_IO_MAX; /* must fit */
+ }
+
+ else
+ png_ptr->zbuf_size = (uInt)size;
+
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
+
+ /* The following ensures a relatively safe failure if this gets called while
+ * the buffer is actually in use.
+ */
png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
+ png_ptr->zstream.avail_out = 0;
+ png_ptr->zstream.avail_in = 0;
}
void PNGAPI
*/
if (png_ptr == NULL)
return;
+
png_ptr->user_width_max = user_width_max;
png_ptr->user_height_max = user_height_max;
}
/* This function was added to libpng 1.4.1 */
void PNGAPI
png_set_chunk_malloc_max (png_structp png_ptr,
- png_alloc_size_t user_chunk_malloc_max)
+ png_alloc_size_t user_chunk_malloc_max)
{
- if (png_ptr)
- png_ptr->user_chunk_malloc_max =
- (png_size_t)user_chunk_malloc_max;
+ if (png_ptr)
+ png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
if (allowed)
png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
+
else
png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
}
--- /dev/null
+
+/* pngstruct.h - header file for PNG reference library
+ *
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
+ * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ *
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+/* The structure that holds the information to read and write PNG files.
+ * The only people who need to care about what is inside of this are the
+ * people who will be modifying the library for their own special needs.
+ * It should NOT be accessed directly by an application.
+ */
+
+#ifndef PNGSTRUCT_H
+#define PNGSTRUCT_H
+/* zlib.h defines the structure z_stream, an instance of which is included
+ * in this structure and is required for decompressing the LZ compressed
+ * data in PNG files.
+ */
+#include "zlib.h"
+
+struct png_struct_def
+{
+#ifdef PNG_SETJMP_SUPPORTED
+ jmp_buf png_jmpbuf; /* used in png_error */
+ png_longjmp_ptr longjmp_fn;/* setjmp non-local goto function. */
+#endif
+ png_error_ptr error_fn; /* function for printing errors and aborting */
+ png_error_ptr warning_fn; /* function for printing warnings */
+ png_voidp error_ptr; /* user supplied struct for error functions */
+ png_rw_ptr write_data_fn; /* function for writing output data */
+ png_rw_ptr read_data_fn; /* function for reading input data */
+ png_voidp io_ptr; /* ptr to application struct for I/O functions */
+
+#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
+ png_user_transform_ptr read_user_transform_fn; /* user read transform */
+#endif
+
+#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
+ png_user_transform_ptr write_user_transform_fn; /* user write transform */
+#endif
+
+/* These were added in libpng-1.0.2 */
+#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
+#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
+ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
+ png_voidp user_transform_ptr; /* user supplied struct for user transform */
+ png_byte user_transform_depth; /* bit depth of user transformed pixels */
+ png_byte user_transform_channels; /* channels in user transformed pixels */
+#endif
+#endif
+
+ png_uint_32 mode; /* tells us where we are in the PNG file */
+ png_uint_32 flags; /* flags indicating various things to libpng */
+ png_uint_32 transformations; /* which transformations to perform */
+
+ z_stream zstream; /* pointer to decompression structure (below) */
+ png_bytep zbuf; /* buffer for zlib */
+ uInt zbuf_size; /* size of zbuf (typically 65536) */
+ int zlib_level; /* holds zlib compression level */
+ int zlib_method; /* holds zlib compression method */
+ int zlib_window_bits; /* holds zlib compression window bits */
+ int zlib_mem_level; /* holds zlib compression memory level */
+ int zlib_strategy; /* holds zlib compression strategy */
+
+ png_uint_32 width; /* width of image in pixels */
+ png_uint_32 height; /* height of image in pixels */
+ png_uint_32 num_rows; /* number of rows in current pass */
+ png_uint_32 usr_width; /* width of row at start of write */
+ png_size_t rowbytes; /* size of row in bytes */
+ png_uint_32 iwidth; /* width of current interlaced row in pixels */
+ png_uint_32 row_number; /* current row in interlace pass */
+ png_bytep prev_row; /* buffer to save previous (unfiltered) row */
+ png_bytep row_buf; /* buffer to save current (unfiltered) row */
+ png_bytep sub_row; /* buffer to save "sub" row when filtering */
+ png_bytep up_row; /* buffer to save "up" row when filtering */
+ png_bytep avg_row; /* buffer to save "avg" row when filtering */
+ png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */
+ png_row_info row_info; /* used for transformation routines */
+
+ png_uint_32 idat_size; /* current IDAT size for read */
+ png_uint_32 crc; /* current chunk CRC value */
+ png_colorp palette; /* palette from the input file */
+ png_uint_16 num_palette; /* number of color entries in palette */
+ png_uint_16 num_trans; /* number of transparency values */
+ png_byte chunk_name[5]; /* null-terminated name of current chunk */
+ png_byte compression; /* file compression type (always 0) */
+ png_byte filter; /* file filter type (always 0) */
+ png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
+ png_byte pass; /* current interlace pass (0 - 6) */
+ png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */
+ png_byte color_type; /* color type of file */
+ png_byte bit_depth; /* bit depth of file */
+ png_byte usr_bit_depth; /* bit depth of users row */
+ png_byte pixel_depth; /* number of bits per pixel */
+ png_byte channels; /* number of channels in file */
+ png_byte usr_channels; /* channels at start of write */
+ png_byte sig_bytes; /* magic bytes read/written from start of file */
+
+#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
+ png_uint_16 filler; /* filler bytes for pixel expansion */
+#endif
+
+#ifdef PNG_bKGD_SUPPORTED
+ png_byte background_gamma_type;
+ png_fixed_point background_gamma;
+ png_color_16 background; /* background color in screen gamma space */
+#ifdef PNG_READ_GAMMA_SUPPORTED
+ png_color_16 background_1; /* background normalized to gamma 1.0 */
+#endif
+#endif /* PNG_bKGD_SUPPORTED */
+
+#ifdef PNG_WRITE_FLUSH_SUPPORTED
+ png_flush_ptr output_flush_fn; /* Function for flushing output */
+ png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */
+ png_uint_32 flush_rows; /* number of rows written since last flush */
+#endif
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ int gamma_shift; /* number of "insignificant" bits in 16-bit gamma */
+ png_fixed_point gamma; /* file gamma value */
+ png_fixed_point screen_gamma; /* screen gamma value (display_exponent) */
+#endif
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ png_bytep gamma_table; /* gamma table for 8-bit depth files */
+ png_bytep gamma_from_1; /* converts from 1.0 to screen */
+ png_bytep gamma_to_1; /* converts from file to 1.0 */
+ png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */
+ png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */
+ png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */
+#endif
+
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED)
+ png_color_8 sig_bit; /* significant bits in each available channel */
+#endif
+
+#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
+ png_color_8 shift; /* shift for significant bit tranformation */
+#endif
+
+#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \
+ || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
+ png_bytep trans_alpha; /* alpha values for paletted files */
+ png_color_16 trans_color; /* transparent color for non-paletted files */
+#endif
+
+ png_read_status_ptr read_row_fn; /* called after each row is decoded */
+ png_write_status_ptr write_row_fn; /* called after each row is encoded */
+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
+ png_progressive_info_ptr info_fn; /* called after header data fully read */
+ png_progressive_row_ptr row_fn; /* called after a prog. row is decoded */
+ png_progressive_end_ptr end_fn; /* called after image is complete */
+ png_bytep save_buffer_ptr; /* current location in save_buffer */
+ png_bytep save_buffer; /* buffer for previously read data */
+ png_bytep current_buffer_ptr; /* current location in current_buffer */
+ png_bytep current_buffer; /* buffer for recently used data */
+ png_uint_32 push_length; /* size of current input chunk */
+ png_uint_32 skip_length; /* bytes to skip in input data */
+ png_size_t save_buffer_size; /* amount of data now in save_buffer */
+ png_size_t save_buffer_max; /* total size of save_buffer */
+ png_size_t buffer_size; /* total amount of available input data */
+ png_size_t current_buffer_size; /* amount of data now in current_buffer */
+ int process_mode; /* what push library is currently doing */
+ int cur_palette; /* current push library palette index */
+
+# ifdef PNG_TEXT_SUPPORTED
+ png_size_t current_text_size; /* current size of text input data */
+ png_size_t current_text_left; /* how much text left to read in input */
+ png_charp current_text; /* current text chunk buffer */
+ png_charp current_text_ptr; /* current location in current_text */
+# endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */
+
+#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
+
+#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
+/* For the Borland special 64K segment handler */
+ png_bytepp offset_table_ptr;
+ png_bytep offset_table;
+ png_uint_16 offset_table_number;
+ png_uint_16 offset_table_count;
+ png_uint_16 offset_table_count_free;
+#endif
+
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+ png_bytep palette_lookup; /* lookup table for quantizing */
+ png_bytep quantize_index; /* index translation for palette files */
+#endif
+
+#if defined(PNG_READ_QUANTIZE_SUPPORTED) || defined(PNG_hIST_SUPPORTED)
+ png_uint_16p hist; /* histogram */
+#endif
+
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+ png_byte heuristic_method; /* heuristic for row filter selection */
+ png_byte num_prev_filters; /* number of weights for previous rows */
+ png_bytep prev_filters; /* filter type(s) of previous row(s) */
+ png_uint_16p filter_weights; /* weight(s) for previous line(s) */
+ png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */
+ png_uint_16p filter_costs; /* relative filter calculation cost */
+ png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */
+#endif
+
+#ifdef PNG_TIME_RFC1123_SUPPORTED
+ png_charp time_buffer; /* String to hold RFC 1123 time text */
+#endif
+
+/* New members added in libpng-1.0.6 */
+
+ png_uint_32 free_me; /* flags items libpng is responsible for freeing */
+
+#ifdef PNG_USER_CHUNKS_SUPPORTED
+ png_voidp user_chunk_ptr;
+ png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */
+#endif
+
+#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+ int num_chunk_list;
+ png_bytep chunk_list;
+#endif
+
+/* New members added in libpng-1.0.3 */
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+ png_byte rgb_to_gray_status;
+ /* These were changed from png_byte in libpng-1.0.6 */
+ png_uint_16 rgb_to_gray_red_coeff;
+ png_uint_16 rgb_to_gray_green_coeff;
+ png_uint_16 rgb_to_gray_blue_coeff;
+#endif
+
+/* New member added in libpng-1.0.4 (renamed in 1.0.9) */
+#if defined(PNG_MNG_FEATURES_SUPPORTED) || \
+ defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
+ defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
+/* Changed from png_byte to png_uint_32 at version 1.2.0 */
+ png_uint_32 mng_features_permitted;
+#endif
+
+/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */
+#ifdef PNG_MNG_FEATURES_SUPPORTED
+ png_byte filter_type;
+#endif
+
+/* New members added in libpng-1.2.0 */
+
+/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */
+#ifdef PNG_USER_MEM_SUPPORTED
+ png_voidp mem_ptr; /* user supplied struct for mem functions */
+ png_malloc_ptr malloc_fn; /* function for allocating memory */
+ png_free_ptr free_fn; /* function for freeing memory */
+#endif
+
+/* New member added in libpng-1.0.13 and 1.2.0 */
+ png_bytep big_row_buf; /* buffer to save current (unfiltered) row */
+
+#ifdef PNG_READ_QUANTIZE_SUPPORTED
+/* The following three members were added at version 1.0.14 and 1.2.4 */
+ png_bytep quantize_sort; /* working sort array */
+ png_bytep index_to_palette; /* where the original index currently is
+ in the palette */
+ png_bytep palette_to_index; /* which original index points to this
+ palette color */
+#endif
+
+/* New members added in libpng-1.0.16 and 1.2.6 */
+ png_byte compression_type;
+
+#ifdef PNG_USER_LIMITS_SUPPORTED
+ png_uint_32 user_width_max;
+ png_uint_32 user_height_max;
+
+ /* Added in libpng-1.4.0: Total number of sPLT, text, and unknown
+ * chunks that can be stored (0 means unlimited).
+ */
+ png_uint_32 user_chunk_cache_max;
+
+ /* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk
+ * can occupy when decompressed. 0 means unlimited.
+ */
+ png_alloc_size_t user_chunk_malloc_max;
+#endif
+
+/* New member added in libpng-1.0.25 and 1.2.17 */
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
+ /* Storage for unknown chunk that the library doesn't recognize. */
+ png_unknown_chunk unknown_chunk;
+#endif
+
+/* New members added in libpng-1.2.26 */
+ png_size_t old_big_row_buf_size;
+ png_size_t old_prev_row_size;
+
+/* New member added in libpng-1.2.30 */
+ png_charp chunkdata; /* buffer for reading chunk data */
+
+#ifdef PNG_IO_STATE_SUPPORTED
+/* New member added in libpng-1.4.0 */
+ png_uint_32 io_state;
+#endif
+};
+#endif /* PNGSTRUCT_H */
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
*
- * Last changed in libpng 1.4.2 [April 29, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* and license in png.h
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#include "pngpriv.h"
+#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
/* Turn on BGR-to-RGB mapping */
void PNGAPI
if (png_ptr == NULL)
return;
+
png_ptr->transformations |= PNG_BGR;
}
#endif
if (png_ptr == NULL)
return;
+
if (png_ptr->bit_depth == 16)
png_ptr->transformations |= PNG_SWAP_BYTES;
}
if (png_ptr == NULL)
return;
+
if (png_ptr->bit_depth < 8)
{
png_ptr->transformations |= PNG_PACK;
if (png_ptr == NULL)
return;
+
if (png_ptr->bit_depth < 8)
png_ptr->transformations |= PNG_PACKSWAP;
}
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
void PNGAPI
-png_set_shift(png_structp png_ptr, png_color_8p true_bits)
+png_set_shift(png_structp png_ptr, png_const_color_8p true_bits)
{
png_debug(1, "in png_set_shift");
if (png_ptr == NULL)
return;
+
png_ptr->transformations |= PNG_SHIFT;
png_ptr->shift = *true_bits;
}
if (png_ptr == NULL)
return;
+
png_ptr->transformations |= PNG_FILLER;
png_ptr->filler = (png_uint_16)filler;
+
if (filler_loc == PNG_FILLER_AFTER)
png_ptr->flags |= PNG_FLAG_FILLER_AFTER;
+
else
png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER;
}
/* Also I added this in libpng-1.0.2a (what happens when we expand
- * a less-than-8-bit grayscale to GA? */
+ * a less-than-8-bit grayscale to GA?) */
if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY && png_ptr->bit_depth >= 8)
{
if (png_ptr == NULL)
return;
+
png_set_filler(png_ptr, filler, filler_loc);
png_ptr->transformations |= PNG_ADD_ALPHA;
}
if (png_ptr == NULL)
return;
+
png_ptr->transformations |= PNG_SWAP_ALPHA;
}
#endif
if (png_ptr == NULL)
return;
+
png_ptr->transformations |= PNG_INVERT_ALPHA;
}
#endif
if (png_ptr == NULL)
return;
+
png_ptr->transformations |= PNG_INVERT_MONO;
}
if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
{
png_bytep rp = row;
- png_uint_32 i;
- png_uint_32 istop = row_info->rowbytes;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
for (i = 0; i < istop; i++)
{
rp++;
}
}
+
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
row_info->bit_depth == 8)
{
png_bytep rp = row;
- png_uint_32 i;
- png_uint_32 istop = row_info->rowbytes;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
- for (i = 0; i < istop; i+=2)
+ for (i = 0; i < istop; i += 2)
{
*rp = (png_byte)(~(*rp));
- rp+=2;
+ rp += 2;
}
}
+
+#ifdef PNG_16BIT_SUPPORTED
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
row_info->bit_depth == 16)
{
png_bytep rp = row;
- png_uint_32 i;
- png_uint_32 istop = row_info->rowbytes;
+ png_size_t i;
+ png_size_t istop = row_info->rowbytes;
- for (i = 0; i < istop; i+=4)
+ for (i = 0; i < istop; i += 4)
{
*rp = (png_byte)(~(*rp));
- *(rp+1) = (png_byte)(~(*(rp+1)));
- rp+=4;
+ *(rp + 1) = (png_byte)(~(*(rp + 1)));
+ rp += 4;
}
}
+#endif
}
#endif
+#ifdef PNG_16BIT_SUPPORTED
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
/* Swaps byte order on 16 bit depth images */
void /* PRIVATE */
{
png_debug(1, "in png_do_swap");
- if (
- row_info->bit_depth == 16)
+ if (row_info->bit_depth == 16)
{
png_bytep rp = row;
png_uint_32 i;
}
}
#endif
+#endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
static PNG_CONST png_byte onebppswaptable[256] = {
{
png_debug(1, "in png_do_packswap");
- if (
- row_info->bit_depth < 8)
+ if (row_info->bit_depth < 8)
{
- png_bytep rp, end, table;
+ png_bytep rp;
+ png_const_bytep end, table;
end = row + row_info->rowbytes;
if (row_info->bit_depth == 1)
- table = (png_bytep)onebppswaptable;
+ table = onebppswaptable;
+
else if (row_info->bit_depth == 2)
- table = (png_bytep)twobppswaptable;
+ table = twobppswaptable;
+
else if (row_info->bit_depth == 4)
- table = (png_bytep)fourbppswaptable;
+ table = fourbppswaptable;
+
else
return;
#if defined(PNG_WRITE_FILLER_SUPPORTED) || \
defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
-/* Remove filler or alpha byte(s) */
+/* Remove a channel - this used to be 'png_do_strip_filler' but it used a
+ * somewhat weird combination of flags to determine what to do. All the calls
+ * to png_do_strip_filler are changed in 1.5.2 to call this instead with the
+ * correct arguments.
+ *
+ * The routine isn't general - the channel must be the channel at the start or
+ * end (not in the middle) of each pixel.
+ */
void /* PRIVATE */
-png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
+png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
{
- png_debug(1, "in png_do_strip_filler");
-
+ png_bytep sp = row; /* source pointer */
+ png_bytep dp = row; /* destination pointer */
+ png_bytep ep = row + row_info->rowbytes; /* One beyond end of row */
+
+ /* At the start sp will point to the first byte to copy and dp to where
+ * it is copied to. ep always points just beyond the end of the row, so
+ * the loop simply copies (channels-1) channels until sp reaches ep.
+ */
+ /* GA, GX, XG cases */
+ if (row_info->channels == 2)
{
- png_bytep sp=row;
- png_bytep dp=row;
- png_uint_32 row_width=row_info->width;
- png_uint_32 i;
+ if (row_info->bit_depth == 8)
+ {
+ if (at_start) /* Skip initial filler */
+ ++sp;
+ else /* Skip initial channels and, for sp, the filler */
+ sp += 2, ++dp;
+
+ /* For a 1 pixel wide image there is nothing to do */
+ while (sp < ep)
+ *dp++ = *sp, sp += 2;
- if ((row_info->color_type == PNG_COLOR_TYPE_RGB ||
- (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
- (flags & PNG_FLAG_STRIP_ALPHA))) &&
- row_info->channels == 4)
+ row_info->pixel_depth = 8;
+ }
+
+ else if (row_info->bit_depth == 16)
{
- if (row_info->bit_depth == 8)
- {
- /* This converts from RGBX or RGBA to RGB */
- if (flags & PNG_FLAG_FILLER_AFTER)
- {
- dp+=3; sp+=4;
- for (i = 1; i < row_width; i++)
- {
- *dp++ = *sp++;
- *dp++ = *sp++;
- *dp++ = *sp++;
- sp++;
- }
- }
- /* This converts from XRGB or ARGB to RGB */
- else
- {
- for (i = 0; i < row_width; i++)
- {
- sp++;
- *dp++ = *sp++;
- *dp++ = *sp++;
- *dp++ = *sp++;
- }
- }
- row_info->pixel_depth = 24;
- row_info->rowbytes = row_width * 3;
- }
- else /* if (row_info->bit_depth == 16) */
- {
- if (flags & PNG_FLAG_FILLER_AFTER)
- {
- /* This converts from RRGGBBXX or RRGGBBAA to RRGGBB */
- sp += 8; dp += 6;
- for (i = 1; i < row_width; i++)
- {
- /* This could be (although png_memcpy is probably slower):
- png_memcpy(dp, sp, 6);
- sp += 8;
- dp += 6;
- */
-
- *dp++ = *sp++;
- *dp++ = *sp++;
- *dp++ = *sp++;
- *dp++ = *sp++;
- *dp++ = *sp++;
- *dp++ = *sp++;
- sp += 2;
- }
- }
- else
- {
- /* This converts from XXRRGGBB or AARRGGBB to RRGGBB */
- for (i = 0; i < row_width; i++)
- {
- /* This could be (although png_memcpy is probably slower):
- png_memcpy(dp, sp, 6);
- sp += 8;
- dp += 6;
- */
-
- sp+=2;
- *dp++ = *sp++;
- *dp++ = *sp++;
- *dp++ = *sp++;
- *dp++ = *sp++;
- *dp++ = *sp++;
- *dp++ = *sp++;
- }
- }
- row_info->pixel_depth = 48;
- row_info->rowbytes = row_width * 6;
- }
- row_info->channels = 3;
+ if (at_start)
+ sp += 2;
+ else
+ sp += 4, dp += 2;
+
+ while (sp < ep)
+ *dp++ = *sp++, *dp++ = *sp, sp += 3;
+
+ row_info->pixel_depth = 16;
+ }
+
+ else
+ return; /* bad bit depth */
+
+ row_info->channels = 1;
+
+ /* Finally fix the color type if it records an alpha channel */
+ if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ row_info->color_type = PNG_COLOR_TYPE_GRAY;
+ }
+
+ /* RGBA, RGBX, XRGB cases */
+ else if (row_info->channels == 4)
+ {
+ if (row_info->bit_depth == 8)
+ {
+ if (at_start) /* Skip initial filler */
+ ++sp;
+ else /* Skip initial channels and, for sp, the filler */
+ sp += 4, dp += 3;
+
+ /* Note that the loop adds 3 to dp and 4 to sp each time. */
+ while (sp < ep)
+ *dp++ = *sp++, *dp++ = *sp++, *dp++ = *sp, sp += 2;
+
+ row_info->pixel_depth = 24;
}
- else if ((row_info->color_type == PNG_COLOR_TYPE_GRAY ||
- (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
- (flags & PNG_FLAG_STRIP_ALPHA))) &&
- row_info->channels == 2)
+
+ else if (row_info->bit_depth == 16)
{
- if (row_info->bit_depth == 8)
- {
- /* This converts from GX or GA to G */
- if (flags & PNG_FLAG_FILLER_AFTER)
- {
- for (i = 0; i < row_width; i++)
- {
- *dp++ = *sp++;
- sp++;
- }
- }
- /* This converts from XG or AG to G */
- else
- {
- for (i = 0; i < row_width; i++)
- {
- sp++;
- *dp++ = *sp++;
- }
- }
- row_info->pixel_depth = 8;
- row_info->rowbytes = row_width;
- }
- else /* if (row_info->bit_depth == 16) */
+ if (at_start)
+ sp += 2;
+ else
+ sp += 8, dp += 6;
+
+ while (sp < ep)
{
- if (flags & PNG_FLAG_FILLER_AFTER)
- {
- /* This converts from GGXX or GGAA to GG */
- sp += 4; dp += 2;
- for (i = 1; i < row_width; i++)
- {
- *dp++ = *sp++;
- *dp++ = *sp++;
- sp += 2;
- }
- }
- else
- {
- /* This converts from XXGG or AAGG to GG */
- for (i = 0; i < row_width; i++)
- {
- sp += 2;
- *dp++ = *sp++;
- *dp++ = *sp++;
- }
- }
- row_info->pixel_depth = 16;
- row_info->rowbytes = row_width * 2;
+ /* Copy 6 bytes, skip 2 */
+ *dp++ = *sp++, *dp++ = *sp++;
+ *dp++ = *sp++, *dp++ = *sp++;
+ *dp++ = *sp++, *dp++ = *sp, sp += 3;
}
- row_info->channels = 1;
+
+ row_info->pixel_depth = 48;
}
- if (flags & PNG_FLAG_STRIP_ALPHA)
- row_info->color_type &= ~PNG_COLOR_MASK_ALPHA;
+
+ else
+ return; /* bad bit depth */
+
+ row_info->channels = 3;
+
+ /* Finally fix the color type if it records an alpha channel */
+ if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ row_info->color_type = PNG_COLOR_TYPE_RGB;
}
+
+ else
+ return; /* The filler channel has gone already */
+
+ /* Fix the rowbytes value. */
+ row_info->rowbytes = dp-row;
}
#endif
{
png_debug(1, "in png_do_bgr");
- if (
- (row_info->color_type & PNG_COLOR_MASK_COLOR))
+ if ((row_info->color_type & PNG_COLOR_MASK_COLOR))
{
png_uint_32 row_width = row_info->width;
if (row_info->bit_depth == 8)
*(rp + 2) = save;
}
}
+
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
{
png_bytep rp;
}
}
}
+
+#ifdef PNG_16BIT_SUPPORTED
else if (row_info->bit_depth == 16)
{
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
*(rp + 5) = save;
}
}
+
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
{
png_bytep rp;
}
}
}
+#endif
}
}
#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
+#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
void PNGAPI
png_set_user_transform_info(png_structp png_ptr, png_voidp
user_transform_ptr, int user_transform_depth, int user_transform_channels)
if (png_ptr == NULL)
return;
-#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
png_ptr->user_transform_ptr = user_transform_ptr;
png_ptr->user_transform_depth = (png_byte)user_transform_depth;
png_ptr->user_transform_channels = (png_byte)user_transform_channels;
-#else
- if (user_transform_ptr || user_transform_depth || user_transform_channels)
- png_warning(png_ptr,
- "This version of libpng does not support user transform info");
-#endif
}
+#endif
/* This function returns a pointer to the user_transform_ptr associated with
* the user transform functions. The application should free any memory
* associated with this pointer before png_write_destroy and png_read_destroy
* are called.
*/
+#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
png_voidp PNGAPI
-png_get_user_transform_ptr(png_structp png_ptr)
+png_get_user_transform_ptr(png_const_structp png_ptr)
{
if (png_ptr == NULL)
return (NULL);
-#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
+
return ((png_voidp)png_ptr->user_transform_ptr);
-#else
- return (NULL);
+}
#endif
+
+#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED
+png_uint_32 PNGAPI
+png_get_current_row_number(png_const_structp png_ptr)
+{
+ /* See the comments in png.h - this is the sub-image row when reading and
+ * interlaced image.
+ */
+ if (png_ptr != NULL)
+ return png_ptr->row_number;
+
+ return PNG_UINT_32_MAX; /* help the app not to fail silently */
+}
+
+png_byte PNGAPI
+png_get_current_pass_number(png_const_structp png_ptr)
+{
+ if (png_ptr != NULL)
+ return png_ptr->pass;
+ return 8; /* invalid */
}
+#endif /* PNG_USER_TRANSFORM_INFO_SUPPORTED */
#endif /* PNG_READ_USER_TRANSFORM_SUPPORTED ||
PNG_WRITE_USER_TRANSFORM_SUPPORTED */
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
/* pngwio.c - functions for data output
*
- * Last changed in libpng 1.4.0 [January 3, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* them at run time with png_set_write_fn(...).
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#ifdef PNG_WRITE_SUPPORTED
#include "pngpriv.h"
+#ifdef PNG_WRITE_SUPPORTED
+
/* Write the data to whatever output you are using. The default routine
* writes to a file pointer. Note that this routine sometimes gets called
* with very small lengths, so you should implement some kind of simple
*/
void /* PRIVATE */
-png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
+png_write_data(png_structp png_ptr, png_const_bytep data, png_size_t length)
{
+ /* NOTE: write_data_fn must not change the buffer! */
if (png_ptr->write_data_fn != NULL )
- (*(png_ptr->write_data_fn))(png_ptr, data, length);
+ (*(png_ptr->write_data_fn))(png_ptr, (png_bytep)data, length);
+
else
png_error(png_ptr, "Call to NULL write function");
}
* than changing the library.
*/
#ifndef USE_FAR_KEYWORD
-void PNGAPI
+void PNGCBAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
- png_uint_32 check;
+ png_size_t check;
if (png_ptr == NULL)
return;
+
check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr));
+
if (check != length)
png_error(png_ptr, "Write Error");
}
#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)
-void PNGAPI
+void PNGCBAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_uint_32 check;
if (png_ptr == NULL)
return;
+
/* Check if data really is near. If so, use usual code. */
near_data = (png_byte *)CVT_PTR_NOCHECK(data);
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
+
if ((png_bytep)near_data == data)
{
check = fwrite(near_data, 1, length, io_ptr);
}
+
else
{
png_byte buf[NEAR_BUF_SIZE];
png_size_t written, remaining, err;
check = 0;
remaining = length;
+
do
{
written = MIN(NEAR_BUF_SIZE, remaining);
png_memcpy(buf, data, written); /* Copy far buffer to near buffer */
err = fwrite(buf, 1, written, io_ptr);
+
if (err != written)
break;
}
while (remaining != 0);
}
+
if (check != length)
png_error(png_ptr, "Write Error");
}
(*(png_ptr->output_flush_fn))(png_ptr);
}
-#ifdef PNG_STDIO_SUPPORTED
-void PNGAPI
+# ifdef PNG_STDIO_SUPPORTED
+void PNGCBAPI
png_default_flush(png_structp png_ptr)
{
png_FILE_p io_ptr;
+
if (png_ptr == NULL)
return;
+
io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
fflush(io_ptr);
}
-#endif
+# endif
#endif
/* This function allows the application to supply new output functions for
*/
void PNGAPI
png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
- png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
+ png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
{
if (png_ptr == NULL)
return;
#endif
#ifdef PNG_WRITE_FLUSH_SUPPORTED
-#ifdef PNG_STDIO_SUPPORTED
+# ifdef PNG_STDIO_SUPPORTED
+
if (output_flush_fn != NULL)
png_ptr->output_flush_fn = output_flush_fn;
else
png_ptr->output_flush_fn = png_default_flush;
-#else
+
+# else
png_ptr->output_flush_fn = output_flush_fn;
-#endif
+# endif
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
/* It is an error to read while writing a png file */
if (png_ptr->read_data_fn != NULL)
{
png_ptr->read_data_fn = NULL;
+
png_warning(png_ptr,
- "Attempted to set both read_data_fn and write_data_fn in");
- png_warning(png_ptr,
- "the same structure. Resetting read_data_fn to NULL");
+ "Can't set both read_data_fn and write_data_fn in the"
+ " same structure");
}
}
#ifdef USE_FAR_KEYWORD
-#ifdef _MSC_VER
+# ifdef _MSC_VER
void *png_far_to_near(png_structp png_ptr, png_voidp ptr, int check)
{
void *near_ptr;
return(near_ptr);
}
-# endif
-# endif
+# endif
+#endif
#endif /* PNG_WRITE_SUPPORTED */
/* pngwrite.c - general routines to write a PNG file
*
- * Last changed in libpng 1.4.0 [January 3, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.1 [February 3, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* and license in png.h
*/
-/* Get internal access to png.h */
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#ifdef PNG_WRITE_SUPPORTED
#include "pngpriv.h"
+#ifdef PNG_WRITE_SUPPORTED
+
/* Writes all the PNG information. This is the suggested way to use the
* library. If you have a new chunk to add, make a function to write it,
* and put it in the correct location here. If you want the chunk written
if (png_ptr == NULL || info_ptr == NULL)
return;
+
if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
{
/* Write PNG signature */
png_write_sig(png_ptr);
+
#ifdef PNG_MNG_FEATURES_SUPPORTED
if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \
- (png_ptr->mng_features_permitted))
+ (png_ptr->mng_features_permitted))
{
png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
png_ptr->mng_features_permitted = 0;
}
#endif
+
/* Write IHDR information. */
png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
- info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type,
- info_ptr->filter_type,
+ info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type,
+ info_ptr->filter_type,
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- info_ptr->interlace_type);
+ info_ptr->interlace_type);
#else
- 0);
+ 0);
#endif
/* The rest of these check to see if the valid field has the appropriate
* flag set, and if it does, writes the chunk.
*/
#ifdef PNG_WRITE_gAMA_SUPPORTED
if (info_ptr->valid & PNG_INFO_gAMA)
- {
-# ifdef PNG_FLOATING_POINT_SUPPORTED
- png_write_gAMA(png_ptr, info_ptr->gamma);
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
- png_write_gAMA_fixed(png_ptr, info_ptr->int_gamma);
-# endif
-#endif
- }
+ png_write_gAMA_fixed(png_ptr, info_ptr->gamma);
#endif
#ifdef PNG_WRITE_sRGB_SUPPORTED
if (info_ptr->valid & PNG_INFO_sRGB)
png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
#endif
+
#ifdef PNG_WRITE_iCCP_SUPPORTED
if (info_ptr->valid & PNG_INFO_iCCP)
png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE,
- info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
+ (png_charp)info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
#endif
#ifdef PNG_WRITE_sBIT_SUPPORTED
if (info_ptr->valid & PNG_INFO_sBIT)
#endif
#ifdef PNG_WRITE_cHRM_SUPPORTED
if (info_ptr->valid & PNG_INFO_cHRM)
- {
-#ifdef PNG_FLOATING_POINT_SUPPORTED
- png_write_cHRM(png_ptr,
- info_ptr->x_white, info_ptr->y_white,
- info_ptr->x_red, info_ptr->y_red,
- info_ptr->x_green, info_ptr->y_green,
- info_ptr->x_blue, info_ptr->y_blue);
-#else
-# ifdef PNG_FIXED_POINT_SUPPORTED
png_write_cHRM_fixed(png_ptr,
- info_ptr->int_x_white, info_ptr->int_y_white,
- info_ptr->int_x_red, info_ptr->int_y_red,
- info_ptr->int_x_green, info_ptr->int_y_green,
- info_ptr->int_x_blue, info_ptr->int_y_blue);
-# endif
-#endif
- }
+ info_ptr->x_white, info_ptr->y_white,
+ info_ptr->x_red, info_ptr->y_red,
+ info_ptr->x_green, info_ptr->y_green,
+ info_ptr->x_blue, info_ptr->y_blue);
#endif
+
#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
if (info_ptr->unknown_chunks_num)
{
up++)
{
int keep = png_handle_as_unknown(png_ptr, up->name);
+
if (keep != PNG_HANDLE_CHUNK_NEVER &&
- up->location && !(up->location & PNG_HAVE_PLTE) &&
- !(up->location & PNG_HAVE_IDAT) &&
- ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
- (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
+ up->location && !(up->location & PNG_HAVE_PLTE) &&
+ !(up->location & PNG_HAVE_IDAT) &&
+ ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
+ (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
{
if (up->size == 0)
png_warning(png_ptr, "Writing zero-length unknown chunk");
+
png_write_chunk(png_ptr, up->name, up->data, up->size);
}
}
if (info_ptr->valid & PNG_INFO_PLTE)
png_write_PLTE(png_ptr, info_ptr->palette,
- (png_uint_32)info_ptr->num_palette);
+ (png_uint_32)info_ptr->num_palette);
+
else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
png_error(png_ptr, "Valid palette required for paletted images");
#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
/* Invert the alpha channel (in tRNS) */
if ((png_ptr->transformations & PNG_INVERT_ALPHA) &&
- info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
int j;
for (j = 0; j<(int)info_ptr->num_trans; j++)
- info_ptr->trans_alpha[j] = (png_byte)(255 - info_ptr->trans_alpha[j]);
+ info_ptr->trans_alpha[j] =
+ (png_byte)(255 - info_ptr->trans_alpha[j]);
}
#endif
png_write_tRNS(png_ptr, info_ptr->trans_alpha, &(info_ptr->trans_color),
- info_ptr->num_trans, info_ptr->color_type);
+ info_ptr->num_trans, info_ptr->color_type);
}
#endif
#ifdef PNG_WRITE_bKGD_SUPPORTED
if (info_ptr->valid & PNG_INFO_bKGD)
png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type);
#endif
+
#ifdef PNG_WRITE_hIST_SUPPORTED
if (info_ptr->valid & PNG_INFO_hIST)
png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette);
#endif
+
#ifdef PNG_WRITE_oFFs_SUPPORTED
if (info_ptr->valid & PNG_INFO_oFFs)
png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset,
- info_ptr->offset_unit_type);
+ info_ptr->offset_unit_type);
#endif
+
#ifdef PNG_WRITE_pCAL_SUPPORTED
if (info_ptr->valid & PNG_INFO_pCAL)
png_write_pCAL(png_ptr, info_ptr->pcal_purpose, info_ptr->pcal_X0,
- info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams,
- info_ptr->pcal_units, info_ptr->pcal_params);
+ info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams,
+ info_ptr->pcal_units, info_ptr->pcal_params);
#endif
-#ifdef PNG_sCAL_SUPPORTED
- if (info_ptr->valid & PNG_INFO_sCAL)
#ifdef PNG_WRITE_sCAL_SUPPORTED
-#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_STDIO_SUPPORTED)
- png_write_sCAL(png_ptr, (int)info_ptr->scal_unit,
- info_ptr->scal_pixel_width, info_ptr->scal_pixel_height);
-#else /* !FLOATING_POINT */
-#ifdef PNG_FIXED_POINT_SUPPORTED
+ if (info_ptr->valid & PNG_INFO_sCAL)
png_write_sCAL_s(png_ptr, (int)info_ptr->scal_unit,
info_ptr->scal_s_width, info_ptr->scal_s_height);
-#endif /* FIXED_POINT */
-#endif /* FLOATING_POINT */
-#else /* !WRITE_sCAL */
- png_warning(png_ptr,
- "png_write_sCAL not supported; sCAL chunk not written");
-#endif /* WRITE_sCAL */
#endif /* sCAL */
#ifdef PNG_WRITE_pHYs_SUPPORTED
if (info_ptr->valid & PNG_INFO_pHYs)
png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit,
- info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type);
+ info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type);
#endif /* pHYs */
#ifdef PNG_WRITE_tIME_SUPPORTED
#ifdef PNG_WRITE_sPLT_SUPPORTED
if (info_ptr->valid & PNG_INFO_sPLT)
- for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
- png_write_sPLT(png_ptr, info_ptr->splt_palettes + i);
+ for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
+ png_write_sPLT(png_ptr, info_ptr->splt_palettes + i);
#endif /* sPLT */
#ifdef PNG_WRITE_TEXT_SUPPORTED
for (i = 0; i < info_ptr->num_text; i++)
{
png_debug2(2, "Writing header text chunk %d, type %d", i,
- info_ptr->text[i].compression);
+ info_ptr->text[i].compression);
/* An internationalized chunk? */
if (info_ptr->text[i].compression > 0)
{
#ifdef PNG_WRITE_iTXt_SUPPORTED
- /* Write international chunk */
- png_write_iTXt(png_ptr,
- info_ptr->text[i].compression,
- info_ptr->text[i].key,
- info_ptr->text[i].lang,
- info_ptr->text[i].lang_key,
- info_ptr->text[i].text);
+ /* Write international chunk */
+ png_write_iTXt(png_ptr,
+ info_ptr->text[i].compression,
+ info_ptr->text[i].key,
+ info_ptr->text[i].lang,
+ info_ptr->text[i].lang_key,
+ info_ptr->text[i].text);
#else
png_warning(png_ptr, "Unable to write international text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
}
+
/* If we want a compressed text chunk */
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_zTXt)
{
#ifdef PNG_WRITE_zTXt_SUPPORTED
/* Write compressed chunk */
png_write_zTXt(png_ptr, info_ptr->text[i].key,
- info_ptr->text[i].text, 0,
- info_ptr->text[i].compression);
+ info_ptr->text[i].text, 0,
+ info_ptr->text[i].compression);
#else
png_warning(png_ptr, "Unable to write compressed text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
}
+
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
{
#ifdef PNG_WRITE_tEXt_SUPPORTED
/* Write uncompressed chunk */
png_write_tEXt(png_ptr, info_ptr->text[i].key,
- info_ptr->text[i].text,
- 0);
+ info_ptr->text[i].text,
+ 0);
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
#else
{
int keep = png_handle_as_unknown(png_ptr, up->name);
if (keep != PNG_HANDLE_CHUNK_NEVER &&
- up->location && (up->location & PNG_HAVE_PLTE) &&
- !(up->location & PNG_HAVE_IDAT) &&
- ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
- (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
+ up->location && (up->location & PNG_HAVE_PLTE) &&
+ !(up->location & PNG_HAVE_IDAT) &&
+ ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
+ (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
{
png_write_chunk(png_ptr, up->name, up->data, up->size);
}
if (png_ptr == NULL)
return;
+
if (!(png_ptr->mode & PNG_HAVE_IDAT))
png_error(png_ptr, "No IDATs written into file");
#ifdef PNG_WRITE_tIME_SUPPORTED
/* Check to see if user has supplied a time chunk */
if ((info_ptr->valid & PNG_INFO_tIME) &&
- !(png_ptr->mode & PNG_WROTE_tIME))
+ !(png_ptr->mode & PNG_WROTE_tIME))
png_write_tIME(png_ptr, &(info_ptr->mod_time));
+
#endif
#ifdef PNG_WRITE_TEXT_SUPPORTED
/* Loop through comment chunks */
#ifdef PNG_WRITE_iTXt_SUPPORTED
/* Write international chunk */
png_write_iTXt(png_ptr,
- info_ptr->text[i].compression,
- info_ptr->text[i].key,
- info_ptr->text[i].lang,
- info_ptr->text[i].lang_key,
- info_ptr->text[i].text);
+ info_ptr->text[i].compression,
+ info_ptr->text[i].key,
+ info_ptr->text[i].lang,
+ info_ptr->text[i].lang_key,
+ info_ptr->text[i].text);
#else
png_warning(png_ptr, "Unable to write international text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
}
+
else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt)
{
#ifdef PNG_WRITE_zTXt_SUPPORTED
/* Write compressed chunk */
png_write_zTXt(png_ptr, info_ptr->text[i].key,
- info_ptr->text[i].text, 0,
- info_ptr->text[i].compression);
+ info_ptr->text[i].text, 0,
+ info_ptr->text[i].compression);
#else
png_warning(png_ptr, "Unable to write compressed text");
#endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
}
+
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
{
#ifdef PNG_WRITE_tEXt_SUPPORTED
/* Write uncompressed chunk */
png_write_tEXt(png_ptr, info_ptr->text[i].key,
- info_ptr->text[i].text, 0);
+ info_ptr->text[i].text, 0);
#else
png_warning(png_ptr, "Unable to write uncompressed text");
#endif
{
int keep = png_handle_as_unknown(png_ptr, up->name);
if (keep != PNG_HANDLE_CHUNK_NEVER &&
- up->location && (up->location & PNG_AFTER_IDAT) &&
- ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
- (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
+ up->location && (up->location & PNG_AFTER_IDAT) &&
+ ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
+ (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
{
png_write_chunk(png_ptr, up->name, up->data, up->size);
}
#ifdef PNG_CONVERT_tIME_SUPPORTED
/* "tm" structure is not supported on WindowsCE */
void PNGAPI
-png_convert_from_struct_tm(png_timep ptime, struct tm FAR * ttime)
+png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm FAR * ttime)
{
png_debug(1, "in png_convert_from_struct_tm");
#endif
/* Initialize png_ptr structure, and allocate any memory needed */
-png_structp PNGAPI
-png_create_write_struct(png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn)
+PNG_FUNCTION(png_structp,PNGAPI
+png_create_write_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED)
{
#ifdef PNG_USER_MEM_SUPPORTED
return (png_create_write_struct_2(user_png_ver, error_ptr, error_fn,
- warn_fn, NULL, NULL, NULL));
+ warn_fn, NULL, NULL, NULL));
}
/* Alternate initialize png_ptr structure, and allocate any memory needed */
-png_structp PNGAPI
-png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
- png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
- png_malloc_ptr malloc_fn, png_free_ptr free_fn)
+static void png_reset_filter_heuristics(png_structp png_ptr); /* forward decl */
+
+PNG_FUNCTION(png_structp,PNGAPI
+png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
+ png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
+ png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED)
{
#endif /* PNG_USER_MEM_SUPPORTED */
volatile int png_cleanup_needed = 0;
png_structp png_ptr;
#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
- jmp_buf jmpbuf;
+ jmp_buf png_jmpbuf;
#endif
#endif
int i;
#ifdef PNG_USER_MEM_SUPPORTED
png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
- (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
+ (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
#else
png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
#endif /* PNG_USER_MEM_SUPPORTED */
encounter a png_error() will longjmp here. Since the jmpbuf is
then meaningless we abort instead of returning. */
#ifdef USE_FAR_KEYWORD
- if (setjmp(jmpbuf))
+ if (setjmp(png_jmpbuf))
#else
if (setjmp(png_jmpbuf(png_ptr))) /* sets longjmp to match setjmp */
#endif
#ifdef USE_FAR_KEYWORD
- png_memcpy(png_jmpbuf(png_ptr), jmpbuf, png_sizeof(jmp_buf));
+ png_memcpy(png_jmpbuf(png_ptr), png_jmpbuf, png_sizeof(jmp_buf));
#endif
PNG_ABORT();
#endif
(user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
(user_png_ver[0] == '0' && user_png_ver[2] < '9'))
{
-#ifdef PNG_STDIO_SUPPORTED
+#ifdef PNG_CONSOLE_IO_SUPPORTED
char msg[80];
+
if (user_png_ver)
{
- png_snprintf(msg, 80,
- "Application was compiled with png.h from libpng-%.20s",
- user_png_ver);
- png_warning(png_ptr, msg);
- }
- png_snprintf(msg, 80,
- "Application is running with png.c from libpng-%.20s",
- png_libpng_ver);
- png_warning(png_ptr, msg);
+ png_snprintf2(msg, 80,
+ "Application built with libpng-%.20s"
+ " but running with %.20s",
+ user_png_ver,
+ png_libpng_ver);
+ png_warning(png_ptr, msg);
+ }
+#else
+ png_warning(png_ptr,
+ "Incompatible libpng version in application and library");
#endif
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
png_ptr->flags = 0;
#endif
- png_warning(png_ptr,
- "Incompatible libpng version in application and library");
png_cleanup_needed = 1;
}
}
/* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
+
if (!png_cleanup_needed)
{
png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr,
- png_ptr->zbuf_size);
+ png_ptr->zbuf_size);
if (png_ptr->zbuf == NULL)
png_cleanup_needed = 1;
}
+
if (png_cleanup_needed)
{
/* Clean up PNG structure and deallocate any memory. */
png_ptr->zbuf = NULL;
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)png_ptr,
- (png_free_ptr)free_fn, (png_voidp)mem_ptr);
+ (png_free_ptr)free_fn, (png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)png_ptr);
#endif
png_set_write_fn(png_ptr, NULL, NULL, NULL);
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT,
- 1, NULL, NULL);
+ png_reset_filter_heuristics(png_ptr);
#endif
return (png_ptr);
*/
void PNGAPI
png_write_rows(png_structp png_ptr, png_bytepp row,
- png_uint_32 num_rows)
+ png_uint_32 num_rows)
{
png_uint_32 i; /* row counter */
png_bytepp rp; /* row pointer */
/* Called by user to write a row of image data */
void PNGAPI
-png_write_row(png_structp png_ptr, png_bytep row)
+png_write_row(png_structp png_ptr, png_const_bytep row)
{
if (png_ptr == NULL)
return;
- png_debug2(1, "in png_write_row (row %ld, pass %d)",
+ png_debug2(1, "in png_write_row (row %u, pass %d)",
png_ptr->row_number, png_ptr->pass);
/* Initialize transformations and other stuff if first time */
/* Make sure we wrote the header info */
if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
png_error(png_ptr,
- "png_write_info was never called before png_write_row");
+ "png_write_info was never called before png_write_row");
/* Check for transforms that have been set but were defined out */
#if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED)
if (png_ptr->transformations & PNG_INVERT_MONO)
png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined");
#endif
+
#if !defined(PNG_WRITE_FILLER_SUPPORTED) && defined(PNG_READ_FILLER_SUPPORTED)
if (png_ptr->transformations & PNG_FILLER)
png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined");
png_warning(png_ptr,
"PNG_WRITE_PACKSWAP_SUPPORTED is not defined");
#endif
+
#if !defined(PNG_WRITE_PACK_SUPPORTED) && defined(PNG_READ_PACK_SUPPORTED)
if (png_ptr->transformations & PNG_PACK)
png_warning(png_ptr, "PNG_WRITE_PACK_SUPPORTED is not defined");
#endif
+
#if !defined(PNG_WRITE_SHIFT_SUPPORTED) && defined(PNG_READ_SHIFT_SUPPORTED)
if (png_ptr->transformations & PNG_SHIFT)
png_warning(png_ptr, "PNG_WRITE_SHIFT_SUPPORTED is not defined");
#endif
+
#if !defined(PNG_WRITE_BGR_SUPPORTED) && defined(PNG_READ_BGR_SUPPORTED)
if (png_ptr->transformations & PNG_BGR)
png_warning(png_ptr, "PNG_WRITE_BGR_SUPPORTED is not defined");
#endif
+
#if !defined(PNG_WRITE_SWAP_SUPPORTED) && defined(PNG_READ_SWAP_SUPPORTED)
if (png_ptr->transformations & PNG_SWAP_BYTES)
png_warning(png_ptr, "PNG_WRITE_SWAP_SUPPORTED is not defined");
return;
}
break;
+
case 1:
if ((png_ptr->row_number & 0x07) || png_ptr->width < 5)
{
return;
}
break;
+
case 2:
if ((png_ptr->row_number & 0x07) != 4)
{
return;
}
break;
+
case 3:
if ((png_ptr->row_number & 0x03) || png_ptr->width < 3)
{
return;
}
break;
+
case 4:
if ((png_ptr->row_number & 0x03) != 2)
{
return;
}
break;
+
case 5:
if ((png_ptr->row_number & 0x01) || png_ptr->width < 2)
{
return;
}
break;
+
case 6:
if (!(png_ptr->row_number & 0x01))
{
return;
}
break;
+
+ default: /* error: ignore it */
+ break;
}
}
#endif
png_ptr->row_info.width);
png_debug1(3, "row_info->color_type = %d", png_ptr->row_info.color_type);
- png_debug1(3, "row_info->width = %lu", png_ptr->row_info.width);
+ png_debug1(3, "row_info->width = %u", png_ptr->row_info.width);
png_debug1(3, "row_info->channels = %d", png_ptr->row_info.channels);
png_debug1(3, "row_info->bit_depth = %d", png_ptr->row_info.bit_depth);
png_debug1(3, "row_info->pixel_depth = %d", png_ptr->row_info.pixel_depth);
- png_debug1(3, "row_info->rowbytes = %lu", png_ptr->row_info.rowbytes);
+ png_debug1(3, "row_info->rowbytes = %lu",
+ (unsigned long)png_ptr->row_info.rowbytes);
/* Copy user's row into buffer, leaving room for filter byte. */
png_memcpy(png_ptr->row_buf + 1, row, png_ptr->row_info.rowbytes);
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* Handle interlacing */
if (png_ptr->interlaced && png_ptr->pass < 6 &&
- (png_ptr->transformations & PNG_INTERLACE))
+ (png_ptr->transformations & PNG_INTERLACE))
{
png_do_write_interlace(&(png_ptr->row_info),
- png_ptr->row_buf + 1, png_ptr->pass);
+ png_ptr->row_buf + 1, png_ptr->pass);
/* This should always get caught above, but still ... */
if (!(png_ptr->row_info.width))
{
* 5. The color_type is RGB or RGBA
*/
if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
- (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
+ (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING))
{
/* Intrapixel differencing */
png_do_write_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1);
if (png_ptr == NULL)
return;
+
png_ptr->flush_dist = (nrows < 0 ? 0 : nrows);
}
if (png_ptr == NULL)
return;
+
/* We have already written out all of the data */
if (png_ptr->row_number >= png_ptr->num_rows)
return;
{
if (png_ptr->zstream.msg != NULL)
png_error(png_ptr, png_ptr->zstream.msg);
+
else
png_error(png_ptr, "zlib error");
}
if (!(png_ptr->zstream.avail_out))
{
/* Write the IDAT and reset the zlib output buffer */
- png_write_IDAT(png_ptr, png_ptr->zbuf,
- png_ptr->zbuf_size);
+ png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
wrote_IDAT = 1;
}
- } while(wrote_IDAT == 1);
+ } while (wrote_IDAT == 1);
/* If there is any data left to be output, write it into a new IDAT */
if (png_ptr->zbuf_size != png_ptr->zstream.avail_out)
{
/* Write the IDAT and reset the zlib output buffer */
png_write_IDAT(png_ptr, png_ptr->zbuf,
- png_ptr->zbuf_size - png_ptr->zstream.avail_out);
+ png_ptr->zbuf_size - png_ptr->zstream.avail_out);
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
}
{
if (png_ptr != NULL)
{
- png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
+ png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- if (png_ptr->num_chunk_list)
- {
- png_free(png_ptr, png_ptr->chunk_list);
- png_ptr->num_chunk_list = 0;
- }
+ if (png_ptr->num_chunk_list)
+ {
+ png_free(png_ptr, png_ptr->chunk_list);
+ png_ptr->num_chunk_list = 0;
+ }
#endif
}
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn,
- (png_voidp)mem_ptr);
+ (png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)info_ptr);
#endif
png_write_destroy(png_ptr);
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn,
- (png_voidp)mem_ptr);
+ (png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)png_ptr);
#endif
#endif
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- png_free(png_ptr, png_ptr->prev_filters);
- png_free(png_ptr, png_ptr->filter_weights);
- png_free(png_ptr, png_ptr->inv_filter_weights);
+ /* Use this to save a little code space, it doesn't free the filter_costs */
+ png_reset_filter_heuristics(png_ptr);
png_free(png_ptr, png_ptr->filter_costs);
png_free(png_ptr, png_ptr->inv_filter_costs);
#endif
#ifdef PNG_SETJMP_SUPPORTED
/* Reset structure */
- png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof(jmp_buf));
+ png_memcpy(tmp_jmp, png_ptr->png_jmpbuf, png_sizeof(jmp_buf));
#endif
error_fn = png_ptr->error_fn;
#endif
#ifdef PNG_SETJMP_SUPPORTED
- png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
+ png_memcpy(png_ptr->png_jmpbuf, tmp_jmp, png_sizeof(jmp_buf));
#endif
}
if (png_ptr == NULL)
return;
+
#ifdef PNG_MNG_FEATURES_SUPPORTED
if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
- (method == PNG_INTRAPIXEL_DIFFERENCING))
- method = PNG_FILTER_TYPE_BASE;
+ (method == PNG_INTRAPIXEL_DIFFERENCING))
+ method = PNG_FILTER_TYPE_BASE;
+
#endif
if (method == PNG_FILTER_TYPE_BASE)
{
case 7: png_warning(png_ptr, "Unknown row filter for method 0");
#endif /* PNG_WRITE_FILTER_SUPPORTED */
case PNG_FILTER_VALUE_NONE:
- png_ptr->do_filter = PNG_FILTER_NONE; break;
+ png_ptr->do_filter = PNG_FILTER_NONE; break;
+
#ifdef PNG_WRITE_FILTER_SUPPORTED
case PNG_FILTER_VALUE_SUB:
- png_ptr->do_filter = PNG_FILTER_SUB; break;
+ png_ptr->do_filter = PNG_FILTER_SUB; break;
+
case PNG_FILTER_VALUE_UP:
- png_ptr->do_filter = PNG_FILTER_UP; break;
+ png_ptr->do_filter = PNG_FILTER_UP; break;
+
case PNG_FILTER_VALUE_AVG:
- png_ptr->do_filter = PNG_FILTER_AVG; break;
+ png_ptr->do_filter = PNG_FILTER_AVG; break;
+
case PNG_FILTER_VALUE_PAETH:
- png_ptr->do_filter = PNG_FILTER_PAETH; break;
- default: png_ptr->do_filter = (png_byte)filters; break;
+ png_ptr->do_filter = PNG_FILTER_PAETH; break;
+
+ default:
+ png_ptr->do_filter = (png_byte)filters; break;
#else
- default: png_warning(png_ptr, "Unknown row filter for method 0");
+ default:
+ png_warning(png_ptr, "Unknown row filter for method 0");
#endif /* PNG_WRITE_FILTER_SUPPORTED */
}
if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL)
{
png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
- (png_ptr->rowbytes + 1));
+ (png_ptr->rowbytes + 1));
png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB;
}
if (png_ptr->prev_row == NULL)
{
png_warning(png_ptr, "Can't add Up filter after starting");
- png_ptr->do_filter &= ~PNG_FILTER_UP;
+ png_ptr->do_filter = (png_byte)(png_ptr->do_filter &
+ ~PNG_FILTER_UP);
}
+
else
{
png_ptr->up_row = (png_bytep)png_malloc(png_ptr,
- (png_ptr->rowbytes + 1));
+ (png_ptr->rowbytes + 1));
png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
}
}
if (png_ptr->prev_row == NULL)
{
png_warning(png_ptr, "Can't add Average filter after starting");
- png_ptr->do_filter &= ~PNG_FILTER_AVG;
+ png_ptr->do_filter = (png_byte)(png_ptr->do_filter &
+ ~PNG_FILTER_AVG);
}
+
else
{
png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
- (png_ptr->rowbytes + 1));
+ (png_ptr->rowbytes + 1));
png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
}
}
png_warning(png_ptr, "Can't add Paeth filter after starting");
png_ptr->do_filter &= (png_byte)(~PNG_FILTER_PAETH);
}
+
else
{
png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr,
- (png_ptr->rowbytes + 1));
+ (png_ptr->rowbytes + 1));
png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
}
}
* better compression.
*/
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */
-void PNGAPI
-png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
- int num_weights, png_doublep filter_weights,
- png_doublep filter_costs)
+/* Convenience reset API. */
+static void
+png_reset_filter_heuristics(png_structp png_ptr)
{
- int i;
-
- png_debug(1, "in png_set_filter_heuristics");
-
- if (png_ptr == NULL)
- return;
- if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST)
+ /* Clear out any old values in the 'weights' - this must be done because if
+ * the app calls set_filter_heuristics multiple times with different
+ * 'num_weights' values we would otherwise potentially have wrong sized
+ * arrays.
+ */
+ png_ptr->num_prev_filters = 0;
+ png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED;
+ if (png_ptr->prev_filters != NULL)
{
- png_warning(png_ptr, "Unknown filter heuristic method");
- return;
+ png_bytep old = png_ptr->prev_filters;
+ png_ptr->prev_filters = NULL;
+ png_free(png_ptr, old);
}
-
- if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT)
+ if (png_ptr->filter_weights != NULL)
{
- heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED;
+ png_uint_16p old = png_ptr->filter_weights;
+ png_ptr->filter_weights = NULL;
+ png_free(png_ptr, old);
}
- if (num_weights < 0 || filter_weights == NULL ||
- heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED)
+ if (png_ptr->inv_filter_weights != NULL)
{
- num_weights = 0;
+ png_uint_16p old = png_ptr->inv_filter_weights;
+ png_ptr->inv_filter_weights = NULL;
+ png_free(png_ptr, old);
}
- png_ptr->num_prev_filters = (png_byte)num_weights;
- png_ptr->heuristic_method = (png_byte)heuristic_method;
+ /* Leave the filter_costs - this array is fixed size. */
+}
- if (num_weights > 0)
+static int
+png_init_filter_heuristics(png_structp png_ptr, int heuristic_method,
+ int num_weights)
+{
+ if (png_ptr == NULL)
+ return 0;
+
+ /* Clear out the arrays */
+ png_reset_filter_heuristics(png_ptr);
+
+ /* Check arguments; the 'reset' function makes the correct settings for the
+ * unweighted case, but we must handle the weight case by initializing the
+ * arrays for the caller.
+ */
+ if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
- if (png_ptr->prev_filters == NULL)
+ int i;
+
+ if (num_weights > 0)
{
png_ptr->prev_filters = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_byte) * num_weights));
+ (png_uint_32)(png_sizeof(png_byte) * num_weights));
/* To make sure that the weighting starts out fairly */
for (i = 0; i < num_weights; i++)
{
png_ptr->prev_filters[i] = 255;
}
- }
- if (png_ptr->filter_weights == NULL)
- {
png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * num_weights));
+ (png_uint_32)(png_sizeof(png_uint_16) * num_weights));
png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * num_weights));
+ (png_uint_32)(png_sizeof(png_uint_16) * num_weights));
+
for (i = 0; i < num_weights; i++)
{
png_ptr->inv_filter_weights[i] =
png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
}
+
+ /* Safe to set this now */
+ png_ptr->num_prev_filters = (png_byte)num_weights;
+ }
+
+ /* If, in the future, there are other filter methods, this would
+ * need to be based on png_ptr->filter.
+ */
+ if (png_ptr->filter_costs == NULL)
+ {
+ png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr,
+ (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
+
+ png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,
+ (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
+ }
+
+ for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
+ {
+ png_ptr->inv_filter_costs[i] =
+ png_ptr->filter_costs[i] = PNG_COST_FACTOR;
}
+ /* All the arrays are inited, safe to set this: */
+ png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_WEIGHTED;
+
+ /* Return the 'ok' code. */
+ return 1;
+ }
+ else if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT ||
+ heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED)
+ {
+ return 1;
+ }
+ else
+ {
+ png_warning(png_ptr, "Unknown filter heuristic method");
+ return 0;
+ }
+}
+
+/* Provide floating and fixed point APIs */
+#ifdef PNG_FLOATING_POINT_SUPPORTED
+void PNGAPI
+png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
+ int num_weights, png_const_doublep filter_weights,
+ png_const_doublep filter_costs)
+{
+ png_debug(1, "in png_set_filter_heuristics");
+
+ /* The internal API allocates all the arrays and ensures that the elements of
+ * those arrays are set to the default value.
+ */
+ if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))
+ return;
+
+ /* If using the weighted method copy in the weights. */
+ if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
+ {
+ int i;
for (i = 0; i < num_weights; i++)
{
- if (filter_weights[i] < 0.0)
+ if (filter_weights[i] <= 0.0)
{
png_ptr->inv_filter_weights[i] =
png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
}
+
else
{
png_ptr->inv_filter_weights[i] =
- (png_uint_16)((double)PNG_WEIGHT_FACTOR*filter_weights[i]+0.5);
+ (png_uint_16)(PNG_WEIGHT_FACTOR*filter_weights[i]+.5);
+
png_ptr->filter_weights[i] =
- (png_uint_16)((double)PNG_WEIGHT_FACTOR/filter_weights[i]+0.5);
+ (png_uint_16)(PNG_WEIGHT_FACTOR/filter_weights[i]+.5);
}
}
- }
-
- /* If, in the future, there are other filter methods, this would
- * need to be based on png_ptr->filter.
- */
- if (png_ptr->filter_costs == NULL)
- {
- png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
- png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
-
- for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
+ /* Here is where we set the relative costs of the different filters. We
+ * should take the desired compression level into account when setting
+ * the costs, so that Paeth, for instance, has a high relative cost at low
+ * compression levels, while it has a lower relative cost at higher
+ * compression settings. The filter types are in order of increasing
+ * relative cost, so it would be possible to do this with an algorithm.
+ */
+ for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) if (filter_costs[i] >= 1.0)
{
png_ptr->inv_filter_costs[i] =
- png_ptr->filter_costs[i] = PNG_COST_FACTOR;
+ (png_uint_16)(PNG_COST_FACTOR / filter_costs[i] + .5);
+
+ png_ptr->filter_costs[i] =
+ (png_uint_16)(PNG_COST_FACTOR * filter_costs[i] + .5);
}
}
+}
+#endif /* FLOATING_POINT */
+
+#ifdef PNG_FIXED_POINT_SUPPORTED
+void PNGAPI
+png_set_filter_heuristics_fixed(png_structp png_ptr, int heuristic_method,
+ int num_weights, png_const_fixed_point_p filter_weights,
+ png_const_fixed_point_p filter_costs)
+{
+ png_debug(1, "in png_set_filter_heuristics_fixed");
- /* Here is where we set the relative costs of the different filters. We
- * should take the desired compression level into account when setting
- * the costs, so that Paeth, for instance, has a high relative cost at low
- * compression levels, while it has a lower relative cost at higher
- * compression settings. The filter types are in order of increasing
- * relative cost, so it would be possible to do this with an algorithm.
+ /* The internal API allocates all the arrays and ensures that the elements of
+ * those arrays are set to the default value.
*/
- for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
+ if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))
+ return;
+
+ /* If using the weighted method copy in the weights. */
+ if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
- if (filter_costs == NULL || filter_costs[i] < 0.0)
+ int i;
+ for (i = 0; i < num_weights; i++)
{
- png_ptr->inv_filter_costs[i] =
- png_ptr->filter_costs[i] = PNG_COST_FACTOR;
+ if (filter_weights[i] <= 0)
+ {
+ png_ptr->inv_filter_weights[i] =
+ png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
+ }
+
+ else
+ {
+ png_ptr->inv_filter_weights[i] = (png_uint_16)
+ ((PNG_WEIGHT_FACTOR*filter_weights[i]+PNG_FP_HALF)/PNG_FP_1);
+
+ png_ptr->filter_weights[i] = (png_uint_16)((PNG_WEIGHT_FACTOR*
+ PNG_FP_1+(filter_weights[i]/2))/filter_weights[i]);
+ }
}
- else if (filter_costs[i] >= 1.0)
+
+ /* Here is where we set the relative costs of the different filters. We
+ * should take the desired compression level into account when setting
+ * the costs, so that Paeth, for instance, has a high relative cost at low
+ * compression levels, while it has a lower relative cost at higher
+ * compression settings. The filter types are in order of increasing
+ * relative cost, so it would be possible to do this with an algorithm.
+ */
+ for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
+ if (filter_costs[i] >= PNG_FP_1)
{
- png_ptr->inv_filter_costs[i] =
- (png_uint_16)((double)PNG_COST_FACTOR / filter_costs[i] + 0.5);
- png_ptr->filter_costs[i] =
- (png_uint_16)((double)PNG_COST_FACTOR * filter_costs[i] + 0.5);
+ png_uint_32 tmp;
+
+ /* Use a 32 bit unsigned temporary here because otherwise the
+ * intermediate value will be a 32 bit *signed* integer (ANSI rules)
+ * and this will get the wrong answer on division.
+ */
+ tmp = PNG_COST_FACTOR*PNG_FP_1 + (filter_costs[i]/2);
+ tmp /= filter_costs[i];
+
+ png_ptr->inv_filter_costs[i] = (png_uint_16)tmp;
+
+ tmp = PNG_COST_FACTOR * filter_costs[i] + PNG_FP_HALF;
+ tmp /= PNG_FP_1;
+
+ png_ptr->filter_costs[i] = (png_uint_16)tmp;
}
}
}
+#endif /* FIXED_POINT */
#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
void PNGAPI
if (png_ptr == NULL)
return;
+
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL;
png_ptr->zlib_level = level;
}
if (png_ptr == NULL)
return;
+
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL;
png_ptr->zlib_mem_level = mem_level;
}
if (png_ptr == NULL)
return;
+
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY;
png_ptr->zlib_strategy = strategy;
}
{
if (png_ptr == NULL)
return;
+
if (window_bits > 15)
png_warning(png_ptr, "Only compression windows <= 32k supported by PNG");
+
else if (window_bits < 8)
png_warning(png_ptr, "Only compression windows >= 256 supported by PNG");
+
#ifndef WBITS_8_OK
/* Avoid libpng bug with 256-byte windows */
if (window_bits == 8)
- {
- png_warning(png_ptr, "Compression window is being reset to 512");
- window_bits = 9;
- }
+ {
+ png_warning(png_ptr, "Compression window is being reset to 512");
+ window_bits = 9;
+ }
+
#endif
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS;
png_ptr->zlib_window_bits = window_bits;
if (png_ptr == NULL)
return;
+
if (method != 8)
png_warning(png_ptr, "Only compression method 8 is supported by PNG");
+
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD;
png_ptr->zlib_method = method;
}
{
if (png_ptr == NULL)
return;
+
png_ptr->write_row_fn = write_row_fn;
}
#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
void PNGAPI
png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr
- write_user_transform_fn)
+ write_user_transform_fn)
{
png_debug(1, "in png_set_write_user_transform_fn");
if (png_ptr == NULL)
return;
+
png_ptr->transformations |= PNG_USER_TRANSFORM;
png_ptr->write_user_transform_fn = write_user_transform_fn;
}
#ifdef PNG_INFO_IMAGE_SUPPORTED
void PNGAPI
png_write_png(png_structp png_ptr, png_infop info_ptr,
- int transforms, voidp params)
+ int transforms, voidp params)
{
if (png_ptr == NULL || info_ptr == NULL)
return;
* as appropriate to correctly scale the image.
*/
if ((transforms & PNG_TRANSFORM_SHIFT)
- && (info_ptr->valid & PNG_INFO_sBIT))
+ && (info_ptr->valid & PNG_INFO_sBIT))
png_set_shift(png_ptr, &info_ptr->sig_bit);
#endif
/* Pack XRGB/RGBX/ARGB/RGBA into * RGB (4 channels -> 3 channels) */
if (transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER)
png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
+
else if (transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE)
png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE);
#endif
/* It is REQUIRED to call this to finish writing the rest of the file */
png_write_end(png_ptr, info_ptr);
- transforms = transforms; /* Quiet compiler warnings */
- params = params;
+ PNG_UNUSED(transforms) /* Quiet compiler warnings */
+ PNG_UNUSED(params)
}
#endif
#endif /* PNG_WRITE_SUPPORTED */
/* pngwtran.c - transforms the data in a row for PNG writers
*
- * Last changed in libpng 1.4.1 [February 25, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.2 [March 31, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* and license in png.h
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#ifdef PNG_WRITE_SUPPORTED
#include "pngpriv.h"
+#ifdef PNG_WRITE_SUPPORTED
+
/* Transform the data according to the user's wishes. The order of
* transformations is significant.
*/
#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
if (png_ptr->transformations & PNG_USER_TRANSFORM)
if (png_ptr->write_user_transform_fn != NULL)
- (*(png_ptr->write_user_transform_fn)) /* User write transform
+ (*(png_ptr->write_user_transform_fn)) /* User write transform
function */
- (png_ptr, /* png_ptr */
- &(png_ptr->row_info), /* row_info: */
- /* png_uint_32 width; width of row */
- /* png_uint_32 rowbytes; number of bytes in row */
- /* png_byte color_type; color type of pixels */
- /* png_byte bit_depth; bit depth of samples */
- /* png_byte channels; number of channels (1-4) */
- /* png_byte pixel_depth; bits per pixel (depth*channels) */
- png_ptr->row_buf + 1); /* start of pixel data for row */
+ (png_ptr, /* png_ptr */
+ &(png_ptr->row_info), /* row_info: */
+ /* png_uint_32 width; width of row */
+ /* png_size_t rowbytes; number of bytes in row */
+ /* png_byte color_type; color type of pixels */
+ /* png_byte bit_depth; bit depth of samples */
+ /* png_byte channels; number of channels (1-4) */
+ /* png_byte pixel_depth; bits per pixel (depth*channels) */
+ png_ptr->row_buf + 1); /* start of pixel data for row */
#endif
+
#ifdef PNG_WRITE_FILLER_SUPPORTED
if (png_ptr->transformations & PNG_FILLER)
- png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
- png_ptr->flags);
+ png_do_strip_channel(&(png_ptr->row_info), png_ptr->row_buf + 1,
+ !(png_ptr->flags & PNG_FILLER_AFTER));
#endif
+
#ifdef PNG_WRITE_PACKSWAP_SUPPORTED
if (png_ptr->transformations & PNG_PACKSWAP)
png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
+
#ifdef PNG_WRITE_PACK_SUPPORTED
if (png_ptr->transformations & PNG_PACK)
png_do_pack(&(png_ptr->row_info), png_ptr->row_buf + 1,
- (png_uint_32)png_ptr->bit_depth);
+ (png_uint_32)png_ptr->bit_depth);
#endif
+
#ifdef PNG_WRITE_SWAP_SUPPORTED
if (png_ptr->transformations & PNG_SWAP_BYTES)
png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
+
#ifdef PNG_WRITE_SHIFT_SUPPORTED
if (png_ptr->transformations & PNG_SHIFT)
png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1,
- &(png_ptr->shift));
+ &(png_ptr->shift));
#endif
+
#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_SWAP_ALPHA)
png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
+
#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
if (png_ptr->transformations & PNG_INVERT_ALPHA)
png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
+
#ifdef PNG_WRITE_BGR_SUPPORTED
if (png_ptr->transformations & PNG_BGR)
png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
+
#ifdef PNG_WRITE_INVERT_SUPPORTED
if (png_ptr->transformations & PNG_INVERT_MONO)
png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
{
if (*sp != 0)
v |= mask;
+
sp++;
+
if (mask > 1)
mask >>= 1;
+
else
{
mask = 0x80;
v = 0;
}
}
+
if (mask != 0x80)
*dp = (png_byte)v;
+
break;
}
+
case 2:
{
png_bytep sp, dp;
dp = row;
shift = 6;
v = 0;
+
for (i = 0; i < row_width; i++)
{
png_byte value;
value = (png_byte)(*sp & 0x03);
v |= (value << shift);
+
if (shift == 0)
{
shift = 6;
dp++;
v = 0;
}
+
else
shift -= 2;
+
sp++;
}
+
if (shift != 6)
*dp = (png_byte)v;
+
break;
}
+
case 4:
{
png_bytep sp, dp;
dp = row;
shift = 4;
v = 0;
+
for (i = 0; i < row_width; i++)
{
png_byte value;
dp++;
v = 0;
}
+
else
shift -= 4;
sp++;
}
+
if (shift != 4)
*dp = (png_byte)v;
+
break;
}
+
+ default:
+ break;
}
+
row_info->bit_depth = (png_byte)bit_depth;
row_info->pixel_depth = (png_byte)(bit_depth * row_info->channels);
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
- row_info->width);
+ row_info->width);
}
}
#endif
* data to 0 to 15.
*/
void /* PRIVATE */
-png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
+png_do_shift(png_row_infop row_info, png_bytep row,
+ png_const_color_8p bit_depth)
{
png_debug(1, "in png_do_shift");
- if (
- row_info->color_type != PNG_COLOR_TYPE_PALETTE)
+ if (row_info->color_type != PNG_COLOR_TYPE_PALETTE)
{
int shift_start[4], shift_dec[4];
int channels = 0;
shift_start[channels] = row_info->bit_depth - bit_depth->red;
shift_dec[channels] = bit_depth->red;
channels++;
+
shift_start[channels] = row_info->bit_depth - bit_depth->green;
shift_dec[channels] = bit_depth->green;
channels++;
+
shift_start[channels] = row_info->bit_depth - bit_depth->blue;
shift_dec[channels] = bit_depth->blue;
channels++;
}
+
else
{
shift_start[channels] = row_info->bit_depth - bit_depth->gray;
shift_dec[channels] = bit_depth->gray;
channels++;
}
+
if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
{
shift_start[channels] = row_info->bit_depth - bit_depth->alpha;
if (row_info->bit_depth < 8)
{
png_bytep bp = row;
- png_uint_32 i;
+ png_size_t i;
png_byte mask;
- png_uint_32 row_bytes = row_info->rowbytes;
+ png_size_t row_bytes = row_info->rowbytes;
if (bit_depth->gray == 1 && row_info->bit_depth == 2)
mask = 0x55;
+
else if (row_info->bit_depth == 4 && bit_depth->gray == 3)
mask = 0x11;
+
else
mask = 0xff;
v = *bp;
*bp = 0;
+
for (j = shift_start[0]; j > -shift_dec[0]; j -= shift_dec[0])
{
if (j > 0)
*bp |= (png_byte)((v << j) & 0xff);
+
else
*bp |= (png_byte)((v >> (-j)) & mask);
}
}
}
+
else if (row_info->bit_depth == 8)
{
png_bytep bp = row;
v = *bp;
*bp = 0;
+
for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
{
if (j > 0)
*bp |= (png_byte)((v << j) & 0xff);
+
else
*bp |= (png_byte)((v >> (-j)) & 0xff);
}
}
}
+
else
{
png_bytep bp;
v = (png_uint_16)(((png_uint_16)(*bp) << 8) + *(bp + 1));
value = 0;
+
for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
{
if (j > 0)
value |= (png_uint_16)((v << j) & (png_uint_16)0xffff);
+
else
value |= (png_uint_16)((v >> (-j)) & (png_uint_16)0xffff);
}
{
if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
{
- /* This converts from ARGB to RGBA */
if (row_info->bit_depth == 8)
{
+ /* This converts from ARGB to RGBA */
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
+
for (i = 0, sp = dp = row; i < row_width; i++)
{
png_byte save = *(sp++);
*(dp++) = save;
}
}
- /* This converts from AARRGGBB to RRGGBBAA */
+
+#ifdef PNG_WRITE_16BIT_SUPPORTED
else
{
+ /* This converts from AARRGGBB to RRGGBBAA */
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
*(dp++) = save[1];
}
}
+#endif /* PNG_WRITE_16BIT_SUPPORTED */
}
+
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
{
- /* This converts from AG to GA */
if (row_info->bit_depth == 8)
{
+ /* This converts from AG to GA */
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
*(dp++) = save;
}
}
- /* This converts from AAGG to GGAA */
+
+#ifdef PNG_WRITE_16BIT_SUPPORTED
else
{
+ /* This converts from AAGG to GGAA */
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
*(dp++) = save[1];
}
}
+#endif /* PNG_WRITE_16BIT_SUPPORTED */
}
}
}
{
if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
{
- /* This inverts the alpha channel in RGBA */
if (row_info->bit_depth == 8)
{
+ /* This inverts the alpha channel in RGBA */
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
+
for (i = 0, sp = dp = row; i < row_width; i++)
{
/* Does nothing
*(dp++) = (png_byte)(255 - *(sp++));
}
}
- /* This inverts the alpha channel in RRGGBBAA */
+
+#ifdef PNG_WRITE_16BIT_SUPPORTED
else
{
+ /* This inverts the alpha channel in RRGGBBAA */
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
*(dp++) = (png_byte)(255 - *(sp++));
}
}
+#endif /* PNG_WRITE_16BIT_SUPPORTED */
}
+
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
{
- /* This inverts the alpha channel in GA */
if (row_info->bit_depth == 8)
{
+ /* This inverts the alpha channel in GA */
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
*(dp++) = (png_byte)(255 - *(sp++));
}
}
- /* This inverts the alpha channel in GGAA */
+
+#ifdef PNG_WRITE_16BIT_SUPPORTED
else
{
+ /* This inverts the alpha channel in GGAA */
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
*(dp++) = (png_byte)(255 - *(sp++));
}
}
+#endif /* PNG_WRITE_16BIT_SUPPORTED */
}
}
}
{
png_debug(1, "in png_do_write_intrapixel");
- if (
- (row_info->color_type & PNG_COLOR_MASK_COLOR))
+ if ((row_info->color_type & PNG_COLOR_MASK_COLOR))
{
int bytes_per_pixel;
png_uint_32 row_width = row_info->width;
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
bytes_per_pixel = 3;
+
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
bytes_per_pixel = 4;
+
else
return;
for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
{
- *(rp) = (png_byte)((*rp - *(rp+1))&0xff);
- *(rp+2) = (png_byte)((*(rp+2) - *(rp+1))&0xff);
+ *(rp) = (png_byte)((*rp - *(rp + 1)) & 0xff);
+ *(rp + 2) = (png_byte)((*(rp + 2) - *(rp + 1)) & 0xff);
}
}
+
+#ifdef PNG_WRITE_16BIT_SUPPORTED
else if (row_info->bit_depth == 16)
{
png_bytep rp;
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
bytes_per_pixel = 6;
+
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
bytes_per_pixel = 8;
+
else
return;
for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
{
- png_uint_32 s0 = (*(rp ) << 8) | *(rp+1);
- png_uint_32 s1 = (*(rp+2) << 8) | *(rp+3);
- png_uint_32 s2 = (*(rp+4) << 8) | *(rp+5);
+ png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1);
+ png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3);
+ png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5);
png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL);
png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL);
- *(rp ) = (png_byte)((red >> 8) & 0xff);
- *(rp+1) = (png_byte)(red & 0xff);
- *(rp+4) = (png_byte)((blue >> 8) & 0xff);
- *(rp+5) = (png_byte)(blue & 0xff);
+ *(rp ) = (png_byte)((red >> 8) & 0xff);
+ *(rp + 1) = (png_byte)(red & 0xff);
+ *(rp + 4) = (png_byte)((blue >> 8) & 0xff);
+ *(rp + 5) = (png_byte)(blue & 0xff);
}
}
+#endif /* PNG_WRITE_16BIT_SUPPORTED */
}
}
#endif /* PNG_MNG_FEATURES_SUPPORTED */
/* pngwutil.c - utilities to write a PNG file
*
- * Last changed in libpng 1.4.1 [February 25, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* and license in png.h
*/
-#define PNG_NO_PEDANTIC_WARNINGS
-#include "png.h"
-#ifdef PNG_WRITE_SUPPORTED
#include "pngpriv.h"
+#ifdef PNG_WRITE_SUPPORTED
+
+#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
/* Place a 32-bit number into a buffer in PNG byte order. We work
* with unsigned numbers for convenience, although one supported
* ancillary chunk uses signed (two's complement) numbers.
#ifdef PNG_SAVE_INT_32_SUPPORTED
/* The png_save_int_32 function assumes integers are stored in two's
* complement format. If this isn't the case, then this routine needs to
- * be modified to write data in two's complement format.
+ * be modified to write data in two's complement format. Note that,
+ * the following works correctly even if png_int_32 has more than 32 bits
+ * (compare the more complex code required on read for sign extention.)
*/
void PNGAPI
png_save_int_32(png_bytep buf, png_int_32 i)
buf[0] = (png_byte)((i >> 8) & 0xff);
buf[1] = (png_byte)(i & 0xff);
}
+#endif
/* Simple function to write the signature. If we have already written
* the magic bytes of the signature, or more likely, the PNG stream is
/* Write the rest of the 8 byte signature */
png_write_data(png_ptr, &png_signature[png_ptr->sig_bytes],
(png_size_t)(8 - png_ptr->sig_bytes));
+
if (png_ptr->sig_bytes < 3)
png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
}
* functions instead.
*/
void PNGAPI
-png_write_chunk(png_structp png_ptr, png_bytep chunk_name,
- png_bytep data, png_size_t length)
+png_write_chunk(png_structp png_ptr, png_const_bytep chunk_name,
+ png_const_bytep data, png_size_t length)
{
if (png_ptr == NULL)
return;
+
png_write_chunk_start(png_ptr, chunk_name, (png_uint_32)length);
png_write_chunk_data(png_ptr, data, (png_size_t)length);
png_write_chunk_end(png_ptr);
* passing in png_write_chunk_data().
*/
void PNGAPI
-png_write_chunk_start(png_structp png_ptr, png_bytep chunk_name,
- png_uint_32 length)
+png_write_chunk_start(png_structp png_ptr, png_const_bytep chunk_name,
+ png_uint_32 length)
{
png_byte buf[8];
png_save_uint_32(buf, length);
png_memcpy(buf + 4, chunk_name, 4);
png_write_data(png_ptr, buf, (png_size_t)8);
+
/* Put the chunk name into png_ptr->chunk_name */
png_memcpy(png_ptr->chunk_name, chunk_name, 4);
+
/* Reset the crc and run it over the chunk name */
png_reset_crc(png_ptr);
+
png_calculate_crc(png_ptr, chunk_name, 4);
#ifdef PNG_IO_STATE_SUPPORTED
* given to png_write_chunk_start().
*/
void PNGAPI
-png_write_chunk_data(png_structp png_ptr, png_bytep data, png_size_t length)
+png_write_chunk_data(png_structp png_ptr, png_const_bytep data,
+ png_size_t length)
{
/* Write the data, and run the CRC over it */
if (png_ptr == NULL)
return;
+
if (data != NULL && length > 0)
{
png_write_data(png_ptr, data, length);
+
/* Update the CRC after writing the data,
* in case that the user I/O routine alters it.
*/
typedef struct
{
- char *input; /* The uncompressed input data */
- int input_len; /* Its length */
- int num_output_ptr; /* Number of output pointers used */
- int max_output_ptr; /* Size of output_ptr */
- png_charpp output_ptr; /* Array of pointers to output */
+ png_const_bytep input; /* The uncompressed input data */
+ png_size_t input_len; /* Its length */
+ int num_output_ptr; /* Number of output pointers used */
+ int max_output_ptr; /* Size of output_ptr */
+ png_bytep *output_ptr; /* Array of pointers to output */
} compression_state;
/* Compress given text into storage in the png_ptr structure */
static int /* PRIVATE */
png_text_compress(png_structp png_ptr,
- png_charp text, png_size_t text_len, int compression,
- compression_state *comp)
+ png_const_charp text, png_size_t text_len, int compression,
+ compression_state *comp)
{
int ret;
/* We may just want to pass the text right through */
if (compression == PNG_TEXT_COMPRESSION_NONE)
{
- comp->input = text;
- comp->input_len = text_len;
- return((int)text_len);
+ comp->input = (png_const_bytep)text;
+ comp->input_len = text_len;
+ return((int)text_len);
}
if (compression >= PNG_TEXT_COMPRESSION_LAST)
{
-#ifdef PNG_STDIO_SUPPORTED
+#ifdef PNG_CONSOLE_IO_SUPPORTED
char msg[50];
png_snprintf(msg, 50, "Unknown compression type %d", compression);
png_warning(png_ptr, msg);
*/
/* Set up the compression buffers */
+ /* TODO: the following cast hides a potential overflow problem. */
png_ptr->zstream.avail_in = (uInt)text_len;
+ /* NOTE: assume zlib doesn't overwrite the input */
png_ptr->zstream.next_in = (Bytef *)text;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- png_ptr->zstream.next_out = (Bytef *)png_ptr->zbuf;
+ png_ptr->zstream.avail_out = png_ptr->zbuf_size;
+ png_ptr->zstream.next_out = png_ptr->zbuf;
/* This is the same compression loop as in png_write_row() */
do
{
/* Compress the data */
ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
+
if (ret != Z_OK)
{
/* Error */
if (png_ptr->zstream.msg != NULL)
png_error(png_ptr, png_ptr->zstream.msg);
+
else
png_error(png_ptr, "zlib error");
}
+
/* Check to see if we need more room */
if (!(png_ptr->zstream.avail_out))
{
comp->max_output_ptr = comp->num_output_ptr + 4;
if (comp->output_ptr != NULL)
{
- png_charpp old_ptr;
+ png_bytepp old_ptr;
old_ptr = comp->output_ptr;
- comp->output_ptr = (png_charpp)png_malloc(png_ptr,
- (png_alloc_size_t)
- (comp->max_output_ptr * png_sizeof(png_charpp)));
+
+ comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
+ (png_alloc_size_t)
+ (comp->max_output_ptr * png_sizeof(png_charpp)));
+
png_memcpy(comp->output_ptr, old_ptr, old_max
- * png_sizeof(png_charp));
+ * png_sizeof(png_charp));
+
png_free(png_ptr, old_ptr);
}
else
- comp->output_ptr = (png_charpp)png_malloc(png_ptr,
- (png_alloc_size_t)
- (comp->max_output_ptr * png_sizeof(png_charp)));
+ comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
+ (png_alloc_size_t)
+ (comp->max_output_ptr * png_sizeof(png_charp)));
}
/* Save the data */
comp->output_ptr[comp->num_output_ptr] =
- (png_charp)png_malloc(png_ptr,
- (png_alloc_size_t)png_ptr->zbuf_size);
+ (png_bytep)png_malloc(png_ptr,
+ (png_alloc_size_t)png_ptr->zbuf_size);
+
png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
- png_ptr->zbuf_size);
+ png_ptr->zbuf_size);
+
comp->num_output_ptr++;
/* and reset the buffer */
comp->max_output_ptr = comp->num_output_ptr + 4;
if (comp->output_ptr != NULL)
{
- png_charpp old_ptr;
+ png_bytepp old_ptr;
old_ptr = comp->output_ptr;
+
/* This could be optimized to realloc() */
- comp->output_ptr = (png_charpp)png_malloc(png_ptr,
- (png_alloc_size_t)(comp->max_output_ptr *
- png_sizeof(png_charp)));
+ comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
+ (png_alloc_size_t)(comp->max_output_ptr *
+ png_sizeof(png_charp)));
+
png_memcpy(comp->output_ptr, old_ptr,
- old_max * png_sizeof(png_charp));
+ old_max * png_sizeof(png_charp));
+
png_free(png_ptr, old_ptr);
}
+
else
- comp->output_ptr = (png_charpp)png_malloc(png_ptr,
- (png_alloc_size_t)(comp->max_output_ptr *
- png_sizeof(png_charp)));
+ comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
+ (png_alloc_size_t)(comp->max_output_ptr *
+ png_sizeof(png_charp)));
}
/* Save the data */
comp->output_ptr[comp->num_output_ptr] =
- (png_charp)png_malloc(png_ptr,
- (png_alloc_size_t)png_ptr->zbuf_size);
+ (png_bytep)png_malloc(png_ptr,
+ (png_alloc_size_t)png_ptr->zbuf_size);
+
png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
- png_ptr->zbuf_size);
+ png_ptr->zbuf_size);
+
comp->num_output_ptr++;
/* and reset the buffer pointers */
/* We got an error */
if (png_ptr->zstream.msg != NULL)
png_error(png_ptr, png_ptr->zstream.msg);
+
else
png_error(png_ptr, "zlib error");
}
/* Text length is number of buffers plus last buffer */
text_len = png_ptr->zbuf_size * comp->num_output_ptr;
+
if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
text_len += png_ptr->zbuf_size - (png_size_t)png_ptr->zstream.avail_out;
/* Handle the no-compression case */
if (comp->input)
{
- png_write_chunk_data(png_ptr, (png_bytep)comp->input,
- (png_size_t)comp->input_len);
+ png_write_chunk_data(png_ptr, comp->input, comp->input_len);
+
return;
}
/* Write saved output buffers, if any */
for (i = 0; i < comp->num_output_ptr; i++)
{
- png_write_chunk_data(png_ptr, (png_bytep)comp->output_ptr[i],
- (png_size_t)png_ptr->zbuf_size);
+ png_write_chunk_data(png_ptr, comp->output_ptr[i],
+ (png_size_t)png_ptr->zbuf_size);
+
png_free(png_ptr, comp->output_ptr[i]);
}
+
if (comp->max_output_ptr != 0)
png_free(png_ptr, comp->output_ptr);
+
/* Write anything left in zbuf */
if (png_ptr->zstream.avail_out < (png_uint_32)png_ptr->zbuf_size)
png_write_chunk_data(png_ptr, png_ptr->zbuf,
- (png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out));
+ (png_size_t)(png_ptr->zbuf_size - png_ptr->zstream.avail_out));
/* Reset zlib for another zTXt/iTXt or image data */
deflateReset(&png_ptr->zstream);
*/
void /* PRIVATE */
png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
- int bit_depth, int color_type, int compression_type, int filter_type,
- int interlace_type)
+ int bit_depth, int color_type, int compression_type, int filter_type,
+ int interlace_type)
{
PNG_IHDR;
int ret;
case 2:
case 4:
case 8:
- case 16: png_ptr->channels = 1; break;
- default: png_error(png_ptr,
- "Invalid bit depth for grayscale image");
+#ifdef PNG_WRITE_16BIT_SUPPORTED
+ case 16:
+#endif
+ png_ptr->channels = 1; break;
+
+ default:
+ png_error(png_ptr,
+ "Invalid bit depth for grayscale image");
}
break;
+
case PNG_COLOR_TYPE_RGB:
+#ifdef PNG_WRITE_16BIT_SUPPORTED
if (bit_depth != 8 && bit_depth != 16)
+#else
+ if (bit_depth != 8)
+#endif
png_error(png_ptr, "Invalid bit depth for RGB image");
+
png_ptr->channels = 3;
break;
+
case PNG_COLOR_TYPE_PALETTE:
switch (bit_depth)
{
case 1:
case 2:
case 4:
- case 8: png_ptr->channels = 1; break;
- default: png_error(png_ptr, "Invalid bit depth for paletted image");
+ case 8:
+ png_ptr->channels = 1;
+ break;
+
+ default:
+ png_error(png_ptr, "Invalid bit depth for paletted image");
}
break;
+
case PNG_COLOR_TYPE_GRAY_ALPHA:
if (bit_depth != 8 && bit_depth != 16)
png_error(png_ptr, "Invalid bit depth for grayscale+alpha image");
+
png_ptr->channels = 2;
break;
+
case PNG_COLOR_TYPE_RGB_ALPHA:
+#ifdef PNG_WRITE_16BIT_SUPPORTED
if (bit_depth != 8 && bit_depth != 16)
+#else
+ if (bit_depth != 8)
+#endif
png_error(png_ptr, "Invalid bit depth for RGBA image");
+
png_ptr->channels = 4;
break;
+
default:
png_error(png_ptr, "Invalid image color type specified");
}
*/
if (
#ifdef PNG_MNG_FEATURES_SUPPORTED
- !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
- ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
- (color_type == PNG_COLOR_TYPE_RGB ||
- color_type == PNG_COLOR_TYPE_RGB_ALPHA) &&
- (filter_type == PNG_INTRAPIXEL_DIFFERENCING)) &&
+ !((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
+ ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
+ (color_type == PNG_COLOR_TYPE_RGB ||
+ color_type == PNG_COLOR_TYPE_RGB_ALPHA) &&
+ (filter_type == PNG_INTRAPIXEL_DIFFERENCING)) &&
#endif
- filter_type != PNG_FILTER_TYPE_BASE)
+ filter_type != PNG_FILTER_TYPE_BASE)
{
png_warning(png_ptr, "Invalid filter type specified");
filter_type = PNG_FILTER_TYPE_BASE;
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
if (interlace_type != PNG_INTERLACE_NONE &&
- interlace_type != PNG_INTERLACE_ADAM7)
+ interlace_type != PNG_INTERLACE_ADAM7)
{
png_warning(png_ptr, "Invalid interlace type specified");
interlace_type = PNG_INTERLACE_ADAM7;
buf[12] = (png_byte)interlace_type;
/* Write the chunk */
- png_write_chunk(png_ptr, (png_bytep)png_IHDR, buf, (png_size_t)13);
+ png_write_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
/* Initialize zlib with PNG info */
png_ptr->zstream.zalloc = png_zalloc;
png_ptr->zstream.zfree = png_zfree;
png_ptr->zstream.opaque = (voidpf)png_ptr;
+
if (!(png_ptr->do_filter))
{
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE ||
- png_ptr->bit_depth < 8)
+ png_ptr->bit_depth < 8)
png_ptr->do_filter = PNG_FILTER_NONE;
+
else
png_ptr->do_filter = PNG_ALL_FILTERS;
}
+
if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_STRATEGY))
{
if (png_ptr->do_filter != PNG_FILTER_NONE)
png_ptr->zlib_strategy = Z_FILTERED;
+
else
png_ptr->zlib_strategy = Z_DEFAULT_STRATEGY;
}
+
if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_LEVEL))
png_ptr->zlib_level = Z_DEFAULT_COMPRESSION;
+
if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL))
png_ptr->zlib_mem_level = 8;
+
if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS))
png_ptr->zlib_window_bits = 15;
+
if (!(png_ptr->flags & PNG_FLAG_ZLIB_CUSTOM_METHOD))
png_ptr->zlib_method = 8;
+
ret = deflateInit2(&png_ptr->zstream, png_ptr->zlib_level,
- png_ptr->zlib_method, png_ptr->zlib_window_bits,
- png_ptr->zlib_mem_level, png_ptr->zlib_strategy);
+ png_ptr->zlib_method, png_ptr->zlib_window_bits,
+ png_ptr->zlib_mem_level, png_ptr->zlib_strategy);
+
if (ret != Z_OK)
{
- if (ret == Z_VERSION_ERROR) png_error(png_ptr,
- "zlib failed to initialize compressor -- version error");
- if (ret == Z_STREAM_ERROR) png_error(png_ptr,
- "zlib failed to initialize compressor -- stream error");
- if (ret == Z_MEM_ERROR) png_error(png_ptr,
- "zlib failed to initialize compressor -- mem error");
+ if (ret == Z_VERSION_ERROR)
+ png_error(png_ptr,
+ "zlib failed to initialize compressor -- version error");
+
+ if (ret == Z_STREAM_ERROR)
+ png_error(png_ptr,
+ "zlib failed to initialize compressor -- stream error");
+
+ if (ret == Z_MEM_ERROR)
+ png_error(png_ptr,
+ "zlib failed to initialize compressor -- mem error");
+
png_error(png_ptr, "zlib failed to initialize compressor");
}
+
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- /* libpng is not interested in zstream.data_type */
- /* Set it to a predefined value, to avoid its evaluation inside zlib */
+ /* libpng is not interested in zstream.data_type, so set it
+ * to a predefined value, to avoid its evaluation inside zlib
+ */
png_ptr->zstream.data_type = Z_BINARY;
png_ptr->mode = PNG_HAVE_IHDR;
* structure.
*/
void /* PRIVATE */
-png_write_PLTE(png_structp png_ptr, png_colorp palette, png_uint_32 num_pal)
+png_write_PLTE(png_structp png_ptr, png_const_colorp palette,
+ png_uint_32 num_pal)
{
PNG_PLTE;
png_uint_32 i;
- png_colorp pal_ptr;
+ png_const_colorp pal_ptr;
png_byte buf[3];
png_debug(1, "in png_write_PLTE");
if ((
#ifdef PNG_MNG_FEATURES_SUPPORTED
- !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
+ !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
#endif
- num_pal == 0) || num_pal > 256)
+ num_pal == 0) || num_pal > 256)
{
- if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
- {
- png_error(png_ptr, "Invalid number of colors in palette");
- }
- else
- {
- png_warning(png_ptr, "Invalid number of colors in palette");
- return;
- }
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ {
+ png_error(png_ptr, "Invalid number of colors in palette");
+ }
+
+ else
+ {
+ png_warning(png_ptr, "Invalid number of colors in palette");
+ return;
+ }
}
if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR))
{
png_warning(png_ptr,
- "Ignoring request to write a PLTE chunk in grayscale PNG");
+ "Ignoring request to write a PLTE chunk in grayscale PNG");
+
return;
}
png_ptr->num_palette = (png_uint_16)num_pal;
png_debug1(3, "num_palette = %d", png_ptr->num_palette);
- png_write_chunk_start(png_ptr, (png_bytep)png_PLTE,
- (png_uint_32)(num_pal * 3));
+ png_write_chunk_start(png_ptr, png_PLTE, (png_uint_32)(num_pal * 3));
#ifdef PNG_POINTER_INDEXING_SUPPORTED
+
for (i = 0, pal_ptr = palette; i < num_pal; i++, pal_ptr++)
{
buf[0] = pal_ptr->red;
buf[2] = pal_ptr->blue;
png_write_chunk_data(png_ptr, buf, (png_size_t)3);
}
+
#else
/* This is a little slower but some buggy compilers need to do this
* instead
*/
pal_ptr=palette;
+
for (i = 0; i < num_pal; i++)
{
buf[0] = pal_ptr[i].red;
buf[2] = pal_ptr[i].blue;
png_write_chunk_data(png_ptr, buf, (png_size_t)3);
}
+
#endif
png_write_chunk_end(png_ptr);
png_ptr->mode |= PNG_HAVE_PLTE;
png_ptr->height < 16384 && png_ptr->width < 16384)
{
png_uint_32 uncompressed_idat_size = png_ptr->height *
- ((png_ptr->width *
- png_ptr->channels * png_ptr->bit_depth + 15) >> 3);
+ ((png_ptr->width *
+ png_ptr->channels * png_ptr->bit_depth + 15) >> 3);
unsigned int z_cinfo = z_cmf >> 4;
unsigned int half_z_window_size = 1 << (z_cinfo + 7);
while (uncompressed_idat_size <= half_z_window_size &&
- half_z_window_size >= 256)
+ half_z_window_size >= 256)
{
z_cinfo--;
half_z_window_size >>= 1;
}
+
z_cmf = (z_cmf & 0x0f) | (z_cinfo << 4);
- if (data[0] != (png_byte)z_cmf)
+
+ if (data[0] != z_cmf)
{
+ int tmp;
data[0] = (png_byte)z_cmf;
- data[1] &= 0xe0;
- data[1] += (png_byte)(0x1f - ((z_cmf << 8) + data[1]) % 0x1f);
+ tmp = data[1] & 0xe0;
+ tmp += 0x1f - ((z_cmf << 8) + tmp) % 0x1f;
+ data[1] = (png_byte)tmp;
}
}
}
+
else
png_error(png_ptr,
- "Invalid zlib compression method or flags in IDAT");
+ "Invalid zlib compression method or flags in IDAT");
}
- png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length);
+ png_write_chunk(png_ptr, png_IDAT, data, length);
png_ptr->mode |= PNG_HAVE_IDAT;
}
png_debug(1, "in png_write_IEND");
- png_write_chunk(png_ptr, (png_bytep)png_IEND, NULL,
- (png_size_t)0);
+ png_write_chunk(png_ptr, png_IEND, NULL, (png_size_t)0);
png_ptr->mode |= PNG_HAVE_IEND;
}
#ifdef PNG_WRITE_gAMA_SUPPORTED
/* Write a gAMA chunk */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-void /* PRIVATE */
-png_write_gAMA(png_structp png_ptr, double file_gamma)
-{
- PNG_gAMA;
- png_uint_32 igamma;
- png_byte buf[4];
-
- png_debug(1, "in png_write_gAMA");
-
- /* file_gamma is saved in 1/100,000ths */
- igamma = (png_uint_32)(file_gamma * 100000.0 + 0.5);
- png_save_uint_32(buf, igamma);
- png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
-}
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
void /* PRIVATE */
png_write_gAMA_fixed(png_structp png_ptr, png_fixed_point file_gamma)
{
/* file_gamma is saved in 1/100,000ths */
png_save_uint_32(buf, (png_uint_32)file_gamma);
- png_write_chunk(png_ptr, (png_bytep)png_gAMA, buf, (png_size_t)4);
+ png_write_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
}
#endif
-#endif
#ifdef PNG_WRITE_sRGB_SUPPORTED
/* Write a sRGB chunk */
png_debug(1, "in png_write_sRGB");
if (srgb_intent >= PNG_sRGB_INTENT_LAST)
- png_warning(png_ptr,
- "Invalid sRGB rendering intent specified");
+ png_warning(png_ptr,
+ "Invalid sRGB rendering intent specified");
+
buf[0]=(png_byte)srgb_intent;
- png_write_chunk(png_ptr, (png_bytep)png_sRGB, buf, (png_size_t)1);
+ png_write_chunk(png_ptr, png_sRGB, buf, (png_size_t)1);
}
#endif
#ifdef PNG_WRITE_iCCP_SUPPORTED
/* Write an iCCP chunk */
void /* PRIVATE */
-png_write_iCCP(png_structp png_ptr, png_charp name, int compression_type,
- png_charp profile, int profile_len)
+png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
+ png_const_charp profile, int profile_len)
{
PNG_iCCP;
png_size_t name_len;
comp.input = NULL;
comp.input_len = 0;
- if ((name_len = png_check_keyword(png_ptr, name,
- &new_name)) == 0)
+ if ((name_len = png_check_keyword(png_ptr, name, &new_name)) == 0)
return;
if (compression_type != PNG_COMPRESSION_TYPE_BASE)
if (profile_len > 3)
embedded_profile_len =
- ((*( (png_bytep)profile ))<<24) |
- ((*( (png_bytep)profile + 1))<<16) |
- ((*( (png_bytep)profile + 2))<< 8) |
- ((*( (png_bytep)profile + 3)) );
+ ((*( (png_const_bytep)profile ))<<24) |
+ ((*( (png_const_bytep)profile + 1))<<16) |
+ ((*( (png_const_bytep)profile + 2))<< 8) |
+ ((*( (png_const_bytep)profile + 3)) );
if (embedded_profile_len < 0)
{
png_warning(png_ptr,
- "Embedded profile length in iCCP chunk is negative");
+ "Embedded profile length in iCCP chunk is negative");
+
png_free(png_ptr, new_name);
return;
}
if (profile_len < embedded_profile_len)
{
png_warning(png_ptr,
- "Embedded profile length too large in iCCP chunk");
+ "Embedded profile length too large in iCCP chunk");
+
png_free(png_ptr, new_name);
return;
}
if (profile_len > embedded_profile_len)
{
png_warning(png_ptr,
- "Truncating profile to actual length in iCCP chunk");
+ "Truncating profile to actual length in iCCP chunk");
+
profile_len = embedded_profile_len;
}
if (profile_len)
profile_len = png_text_compress(png_ptr, profile,
- (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp);
+ (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp);
/* Make sure we include the NULL after the name and the compression type */
- png_write_chunk_start(png_ptr, (png_bytep)png_iCCP,
- (png_uint_32)(name_len + profile_len + 2));
+ png_write_chunk_start(png_ptr, png_iCCP,
+ (png_uint_32)(name_len + profile_len + 2));
+
new_name[name_len + 1] = 0x00;
+
png_write_chunk_data(png_ptr, (png_bytep)new_name,
- (png_size_t)(name_len + 2));
+ (png_size_t)(name_len + 2));
if (profile_len)
png_write_compressed_data_out(png_ptr, &comp);
#ifdef PNG_WRITE_sPLT_SUPPORTED
/* Write a sPLT chunk */
void /* PRIVATE */
-png_write_sPLT(png_structp png_ptr, png_sPLT_tp spalette)
+png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
{
PNG_sPLT;
png_size_t name_len;
return;
/* Make sure we include the NULL after the name */
- png_write_chunk_start(png_ptr, (png_bytep)png_sPLT,
- (png_uint_32)(name_len + 2 + palette_size));
+ png_write_chunk_start(png_ptr, png_sPLT,
+ (png_uint_32)(name_len + 2 + palette_size));
+
png_write_chunk_data(png_ptr, (png_bytep)new_name,
- (png_size_t)(name_len + 1));
- png_write_chunk_data(png_ptr, (png_bytep)&spalette->depth, (png_size_t)1);
+ (png_size_t)(name_len + 1));
+
+ png_write_chunk_data(png_ptr, &spalette->depth, (png_size_t)1);
/* Loop through each palette entry, writing appropriately */
#ifdef PNG_POINTER_INDEXING_SUPPORTED
{
if (spalette->depth == 8)
{
- entrybuf[0] = (png_byte)ep->red;
- entrybuf[1] = (png_byte)ep->green;
- entrybuf[2] = (png_byte)ep->blue;
- entrybuf[3] = (png_byte)ep->alpha;
- png_save_uint_16(entrybuf + 4, ep->frequency);
+ entrybuf[0] = (png_byte)ep->red;
+ entrybuf[1] = (png_byte)ep->green;
+ entrybuf[2] = (png_byte)ep->blue;
+ entrybuf[3] = (png_byte)ep->alpha;
+ png_save_uint_16(entrybuf + 4, ep->frequency);
}
+
else
{
- png_save_uint_16(entrybuf + 0, ep->red);
- png_save_uint_16(entrybuf + 2, ep->green);
- png_save_uint_16(entrybuf + 4, ep->blue);
- png_save_uint_16(entrybuf + 6, ep->alpha);
- png_save_uint_16(entrybuf + 8, ep->frequency);
+ png_save_uint_16(entrybuf + 0, ep->red);
+ png_save_uint_16(entrybuf + 2, ep->green);
+ png_save_uint_16(entrybuf + 4, ep->blue);
+ png_save_uint_16(entrybuf + 6, ep->alpha);
+ png_save_uint_16(entrybuf + 8, ep->frequency);
}
+
png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
}
#else
ep=spalette->entries;
- for (i=0; i>spalette->nentries; i++)
+ for (i = 0; i>spalette->nentries; i++)
{
if (spalette->depth == 8)
{
- entrybuf[0] = (png_byte)ep[i].red;
- entrybuf[1] = (png_byte)ep[i].green;
- entrybuf[2] = (png_byte)ep[i].blue;
- entrybuf[3] = (png_byte)ep[i].alpha;
- png_save_uint_16(entrybuf + 4, ep[i].frequency);
+ entrybuf[0] = (png_byte)ep[i].red;
+ entrybuf[1] = (png_byte)ep[i].green;
+ entrybuf[2] = (png_byte)ep[i].blue;
+ entrybuf[3] = (png_byte)ep[i].alpha;
+ png_save_uint_16(entrybuf + 4, ep[i].frequency);
}
+
else
{
- png_save_uint_16(entrybuf + 0, ep[i].red);
- png_save_uint_16(entrybuf + 2, ep[i].green);
- png_save_uint_16(entrybuf + 4, ep[i].blue);
- png_save_uint_16(entrybuf + 6, ep[i].alpha);
- png_save_uint_16(entrybuf + 8, ep[i].frequency);
+ png_save_uint_16(entrybuf + 0, ep[i].red);
+ png_save_uint_16(entrybuf + 2, ep[i].green);
+ png_save_uint_16(entrybuf + 4, ep[i].blue);
+ png_save_uint_16(entrybuf + 6, ep[i].alpha);
+ png_save_uint_16(entrybuf + 8, ep[i].frequency);
}
+
png_write_chunk_data(png_ptr, entrybuf, (png_size_t)entry_size);
}
#endif
#ifdef PNG_WRITE_sBIT_SUPPORTED
/* Write the sBIT chunk */
void /* PRIVATE */
-png_write_sBIT(png_structp png_ptr, png_color_8p sbit, int color_type)
+png_write_sBIT(png_structp png_ptr, png_const_color_8p sbit, int color_type)
{
PNG_sBIT;
png_byte buf[4];
png_byte maxbits;
maxbits = (png_byte)(color_type==PNG_COLOR_TYPE_PALETTE ? 8 :
- png_ptr->usr_bit_depth);
+ png_ptr->usr_bit_depth);
+
if (sbit->red == 0 || sbit->red > maxbits ||
sbit->green == 0 || sbit->green > maxbits ||
sbit->blue == 0 || sbit->blue > maxbits)
png_warning(png_ptr, "Invalid sBIT depth specified");
return;
}
+
buf[0] = sbit->red;
buf[1] = sbit->green;
buf[2] = sbit->blue;
size = 3;
}
+
else
{
if (sbit->gray == 0 || sbit->gray > png_ptr->usr_bit_depth)
png_warning(png_ptr, "Invalid sBIT depth specified");
return;
}
+
buf[0] = sbit->gray;
size = 1;
}
png_warning(png_ptr, "Invalid sBIT depth specified");
return;
}
+
buf[size++] = sbit->alpha;
}
- png_write_chunk(png_ptr, (png_bytep)png_sBIT, buf, size);
+ png_write_chunk(png_ptr, png_sBIT, buf, size);
}
#endif
#ifdef PNG_WRITE_cHRM_SUPPORTED
/* Write the cHRM chunk */
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-void /* PRIVATE */
-png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
- double red_x, double red_y, double green_x, double green_y,
- double blue_x, double blue_y)
-{
- PNG_cHRM;
- png_byte buf[32];
-
- png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y,
- int_green_x, int_green_y, int_blue_x, int_blue_y;
-
- png_debug(1, "in png_write_cHRM");
-
- int_white_x = (png_uint_32)(white_x * 100000.0 + 0.5);
- int_white_y = (png_uint_32)(white_y * 100000.0 + 0.5);
- int_red_x = (png_uint_32)(red_x * 100000.0 + 0.5);
- int_red_y = (png_uint_32)(red_y * 100000.0 + 0.5);
- int_green_x = (png_uint_32)(green_x * 100000.0 + 0.5);
- int_green_y = (png_uint_32)(green_y * 100000.0 + 0.5);
- int_blue_x = (png_uint_32)(blue_x * 100000.0 + 0.5);
- int_blue_y = (png_uint_32)(blue_y * 100000.0 + 0.5);
-
-#ifdef PNG_CHECK_cHRM_SUPPORTED
- if (png_check_cHRM_fixed(png_ptr, int_white_x, int_white_y,
- int_red_x, int_red_y, int_green_x, int_green_y, int_blue_x, int_blue_y))
-#endif
- {
- /* Each value is saved in 1/100,000ths */
-
- png_save_uint_32(buf, int_white_x);
- png_save_uint_32(buf + 4, int_white_y);
-
- png_save_uint_32(buf + 8, int_red_x);
- png_save_uint_32(buf + 12, int_red_y);
-
- png_save_uint_32(buf + 16, int_green_x);
- png_save_uint_32(buf + 20, int_green_y);
-
- png_save_uint_32(buf + 24, int_blue_x);
- png_save_uint_32(buf + 28, int_blue_y);
-
- png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
- }
-}
-#endif
-#ifdef PNG_FIXED_POINT_SUPPORTED
void /* PRIVATE */
png_write_cHRM_fixed(png_structp png_ptr, png_fixed_point white_x,
- png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y,
- png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x,
- png_fixed_point blue_y)
+ png_fixed_point white_y, png_fixed_point red_x, png_fixed_point red_y,
+ png_fixed_point green_x, png_fixed_point green_y, png_fixed_point blue_x,
+ png_fixed_point blue_y)
{
PNG_cHRM;
png_byte buf[32];
/* Each value is saved in 1/100,000ths */
#ifdef PNG_CHECK_cHRM_SUPPORTED
if (png_check_cHRM_fixed(png_ptr, white_x, white_y, red_x, red_y,
- green_x, green_y, blue_x, blue_y))
+ green_x, green_y, blue_x, blue_y))
#endif
{
png_save_uint_32(buf, (png_uint_32)white_x);
png_save_uint_32(buf + 24, (png_uint_32)blue_x);
png_save_uint_32(buf + 28, (png_uint_32)blue_y);
- png_write_chunk(png_ptr, (png_bytep)png_cHRM, buf, (png_size_t)32);
+ png_write_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);
}
}
#endif
-#endif
#ifdef PNG_WRITE_tRNS_SUPPORTED
/* Write the tRNS chunk */
void /* PRIVATE */
-png_write_tRNS(png_structp png_ptr, png_bytep trans_alpha, png_color_16p tran,
- int num_trans, int color_type)
+png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha,
+ png_const_color_16p tran, int num_trans, int color_type)
{
PNG_tRNS;
png_byte buf[6];
png_warning(png_ptr, "Invalid number of transparent colors specified");
return;
}
+
/* Write the chunk out as it is */
- png_write_chunk(png_ptr, (png_bytep)png_tRNS, trans_alpha,
- (png_size_t)num_trans);
+ png_write_chunk(png_ptr, png_tRNS, trans_alpha, (png_size_t)num_trans);
}
+
else if (color_type == PNG_COLOR_TYPE_GRAY)
{
/* One 16 bit value */
if (tran->gray >= (1 << png_ptr->bit_depth))
{
png_warning(png_ptr,
- "Ignoring attempt to write tRNS chunk out-of-range for bit_depth");
+ "Ignoring attempt to write tRNS chunk out-of-range for bit_depth");
+
return;
}
+
png_save_uint_16(buf, tran->gray);
- png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)2);
+ png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)2);
}
+
else if (color_type == PNG_COLOR_TYPE_RGB)
{
/* Three 16 bit values */
png_save_uint_16(buf, tran->red);
png_save_uint_16(buf + 2, tran->green);
png_save_uint_16(buf + 4, tran->blue);
+#ifdef PNG_WRITE_16BIT_SUPPORTED
if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
+#else
+ if (buf[0] | buf[2] | buf[4])
+#endif
{
png_warning(png_ptr,
"Ignoring attempt to write 16-bit tRNS chunk when bit_depth is 8");
return;
}
- png_write_chunk(png_ptr, (png_bytep)png_tRNS, buf, (png_size_t)6);
+
+ png_write_chunk(png_ptr, png_tRNS, buf, (png_size_t)6);
}
+
else
{
png_warning(png_ptr, "Can't write tRNS with an alpha channel");
#ifdef PNG_WRITE_bKGD_SUPPORTED
/* Write the background chunk */
void /* PRIVATE */
-png_write_bKGD(png_structp png_ptr, png_color_16p back, int color_type)
+png_write_bKGD(png_structp png_ptr, png_const_color_16p back, int color_type)
{
PNG_bKGD;
png_byte buf[6];
png_warning(png_ptr, "Invalid background palette index");
return;
}
+
buf[0] = back->index;
- png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)1);
+ png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)1);
}
+
else if (color_type & PNG_COLOR_MASK_COLOR)
{
png_save_uint_16(buf, back->red);
png_save_uint_16(buf + 2, back->green);
png_save_uint_16(buf + 4, back->blue);
+#ifdef PNG_WRITE_16BIT_SUPPORTED
if (png_ptr->bit_depth == 8 && (buf[0] | buf[2] | buf[4]))
+#else
+ if (buf[0] | buf[2] | buf[4])
+#endif
{
png_warning(png_ptr,
- "Ignoring attempt to write 16-bit bKGD chunk when bit_depth is 8");
+ "Ignoring attempt to write 16-bit bKGD chunk when bit_depth is 8");
+
return;
}
- png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)6);
+
+ png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)6);
}
+
else
{
if (back->gray >= (1 << png_ptr->bit_depth))
{
png_warning(png_ptr,
- "Ignoring attempt to write bKGD chunk out-of-range for bit_depth");
+ "Ignoring attempt to write bKGD chunk out-of-range for bit_depth");
+
return;
}
+
png_save_uint_16(buf, back->gray);
- png_write_chunk(png_ptr, (png_bytep)png_bKGD, buf, (png_size_t)2);
+ png_write_chunk(png_ptr, png_bKGD, buf, (png_size_t)2);
}
}
#endif
#ifdef PNG_WRITE_hIST_SUPPORTED
/* Write the histogram */
void /* PRIVATE */
-png_write_hIST(png_structp png_ptr, png_uint_16p hist, int num_hist)
+png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist)
{
PNG_hIST;
int i;
if (num_hist > (int)png_ptr->num_palette)
{
png_debug2(3, "num_hist = %d, num_palette = %d", num_hist,
- png_ptr->num_palette);
+ png_ptr->num_palette);
+
png_warning(png_ptr, "Invalid number of histogram entries specified");
return;
}
- png_write_chunk_start(png_ptr, (png_bytep)png_hIST,
- (png_uint_32)(num_hist * 2));
+ png_write_chunk_start(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));
+
for (i = 0; i < num_hist; i++)
{
png_save_uint_16(buf, hist[i]);
png_write_chunk_data(png_ptr, buf, (png_size_t)2);
}
+
png_write_chunk_end(png_ptr);
}
#endif
* static keywords without having to have duplicate copies of the strings.
*/
png_size_t /* PRIVATE */
-png_check_keyword(png_structp png_ptr, png_charp key, png_charpp new_key)
+png_check_keyword(png_structp png_ptr, png_const_charp key, png_charpp new_key)
{
png_size_t key_len;
+ png_const_charp ikp;
png_charp kp, dp;
int kflag;
int kwarn=0;
png_debug1(2, "Keyword to be checked is '%s'", key);
*new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2));
+
if (*new_key == NULL)
{
png_warning(png_ptr, "Out of memory while procesing keyword");
}
/* Replace non-printing characters with a blank and print a warning */
- for (kp = key, dp = *new_key; *kp != '\0'; kp++, dp++)
+ for (ikp = key, dp = *new_key; *ikp != '\0'; ikp++, dp++)
{
- if ((png_byte)*kp < 0x20 ||
- ((png_byte)*kp > 0x7E && (png_byte)*kp < 0xA1))
+ if ((png_byte)*ikp < 0x20 ||
+ ((png_byte)*ikp > 0x7E && (png_byte)*ikp < 0xA1))
{
-#ifdef PNG_STDIO_SUPPORTED
+#ifdef PNG_CONSOLE_IO_SUPPORTED
char msg[40];
png_snprintf(msg, 40,
- "invalid keyword character 0x%02X", (png_byte)*kp);
+ "invalid keyword character 0x%02X", (png_byte)*ikp);
png_warning(png_ptr, msg);
#else
png_warning(png_ptr, "invalid character in keyword");
#endif
*dp = ' ';
}
+
else
{
- *dp = *kp;
+ *dp = *ikp;
}
}
*dp = '\0';
*(dp++) = *kp;
kflag = 1;
}
+
else if (*kp == ' ')
{
key_len--;
- kwarn=1;
+ kwarn = 1;
}
+
else
{
*(dp++) = *kp;
#ifdef PNG_WRITE_tEXt_SUPPORTED
/* Write a tEXt chunk */
void /* PRIVATE */
-png_write_tEXt(png_structp png_ptr, png_charp key, png_charp text,
- png_size_t text_len)
+png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
+ png_size_t text_len)
{
PNG_tEXt;
png_size_t key_len;
if (text == NULL || *text == '\0')
text_len = 0;
+
else
text_len = png_strlen(text);
/* Make sure we include the 0 after the key */
- png_write_chunk_start(png_ptr, (png_bytep)png_tEXt,
- (png_uint_32)(key_len + text_len + 1));
+ png_write_chunk_start(png_ptr, png_tEXt,
+ (png_uint_32)(key_len + text_len + 1));
/*
* We leave it to the application to meet PNG-1.0 requirements on the
* contents of the text. PNG-1.0 through PNG-1.2 discourage the use of
* The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
*/
png_write_chunk_data(png_ptr, (png_bytep)new_key,
- (png_size_t)(key_len + 1));
+ (png_size_t)(key_len + 1));
+
if (text_len)
- png_write_chunk_data(png_ptr, (png_bytep)text, (png_size_t)text_len);
+ png_write_chunk_data(png_ptr, (png_const_bytep)text,
+ (png_size_t)text_len);
png_write_chunk_end(png_ptr);
png_free(png_ptr, new_key);
#ifdef PNG_WRITE_zTXt_SUPPORTED
/* Write a compressed text chunk */
void /* PRIVATE */
-png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text,
- png_size_t text_len, int compression)
+png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
+ png_size_t text_len, int compression)
{
PNG_zTXt;
png_size_t key_len;
- char buf[1];
+ png_byte buf;
png_charp new_key;
compression_state comp;
comp.input = NULL;
comp.input_len = 0;
- if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0)
+ if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0)
{
png_free(png_ptr, new_key);
return;
&comp);
/* Write start of chunk */
- png_write_chunk_start(png_ptr, (png_bytep)png_zTXt,
- (png_uint_32)(key_len+text_len + 2));
+ png_write_chunk_start(png_ptr, png_zTXt,
+ (png_uint_32)(key_len+text_len + 2));
+
/* Write key */
png_write_chunk_data(png_ptr, (png_bytep)new_key,
- (png_size_t)(key_len + 1));
+ (png_size_t)(key_len + 1));
+
png_free(png_ptr, new_key);
- buf[0] = (png_byte)compression;
+ buf = (png_byte)compression;
+
/* Write compression */
- png_write_chunk_data(png_ptr, (png_bytep)buf, (png_size_t)1);
+ png_write_chunk_data(png_ptr, &buf, (png_size_t)1);
+
/* Write the compressed data */
png_write_compressed_data_out(png_ptr, &comp);
#ifdef PNG_WRITE_iTXt_SUPPORTED
/* Write an iTXt chunk */
void /* PRIVATE */
-png_write_iTXt(png_structp png_ptr, int compression, png_charp key,
- png_charp lang, png_charp lang_key, png_charp text)
+png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
+ png_const_charp lang, png_const_charp lang_key, png_const_charp text)
{
PNG_iTXt;
png_size_t lang_len, key_len, lang_key_len, text_len;
comp.output_ptr = NULL;
comp.input = NULL;
- if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0)
+ if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0)
return;
- if ((lang_len = png_check_keyword(png_ptr, lang, &new_lang))==0)
+ if ((lang_len = png_check_keyword(png_ptr, lang, &new_lang)) == 0)
{
png_warning(png_ptr, "Empty language field in iTXt chunk");
new_lang = NULL;
if (lang_key == NULL)
lang_key_len = 0;
+
else
lang_key_len = png_strlen(lang_key);
if (text == NULL)
text_len = 0;
+
else
text_len = png_strlen(text);
/* Compute the compressed data; do it now for the length */
- text_len = png_text_compress(png_ptr, text, text_len, compression-2,
- &comp);
+ text_len = png_text_compress(png_ptr, text, text_len, compression - 2,
+ &comp);
/* Make sure we include the compression flag, the compression byte,
- * and the NULs after the key, lang, and lang_key parts */
+ * and the NULs after the key, lang, and lang_key parts
+ */
- png_write_chunk_start(png_ptr, (png_bytep)png_iTXt,
- (png_uint_32)(
+ png_write_chunk_start(png_ptr, png_iTXt, (png_uint_32)(
5 /* comp byte, comp flag, terminators for key, lang and lang_key */
+ key_len
+ lang_len
* any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
* The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
*/
- png_write_chunk_data(png_ptr, (png_bytep)new_key,
- (png_size_t)(key_len + 1));
+ png_write_chunk_data(png_ptr, (png_bytep)new_key, (png_size_t)(key_len + 1));
/* Set the compression flag */
- if (compression == PNG_ITXT_COMPRESSION_NONE || \
+ if (compression == PNG_ITXT_COMPRESSION_NONE ||
compression == PNG_TEXT_COMPRESSION_NONE)
- cbuf[0] = 0;
+ cbuf[0] = 0;
+
else /* compression == PNG_ITXT_COMPRESSION_zTXt */
- cbuf[0] = 1;
+ cbuf[0] = 1;
+
/* Set the compression method */
cbuf[1] = 0;
+
png_write_chunk_data(png_ptr, cbuf, (png_size_t)2);
cbuf[0] = 0;
- png_write_chunk_data(png_ptr, (new_lang ? (png_bytep)new_lang : cbuf),
- (png_size_t)(lang_len + 1));
- png_write_chunk_data(png_ptr, (lang_key ? (png_bytep)lang_key : cbuf),
- (png_size_t)(lang_key_len + 1));
+ png_write_chunk_data(png_ptr, (new_lang ? (png_const_bytep)new_lang : cbuf),
+ (png_size_t)(lang_len + 1));
+
+ png_write_chunk_data(png_ptr, (lang_key ? (png_const_bytep)lang_key : cbuf),
+ (png_size_t)(lang_key_len + 1));
+
png_write_compressed_data_out(png_ptr, &comp);
png_write_chunk_end(png_ptr);
+
png_free(png_ptr, new_key);
png_free(png_ptr, new_lang);
}
/* Write the oFFs chunk */
void /* PRIVATE */
png_write_oFFs(png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset,
- int unit_type)
+ int unit_type)
{
PNG_oFFs;
png_byte buf[9];
png_save_int_32(buf + 4, y_offset);
buf[8] = (png_byte)unit_type;
- png_write_chunk(png_ptr, (png_bytep)png_oFFs, buf, (png_size_t)9);
+ png_write_chunk(png_ptr, png_oFFs, buf, (png_size_t)9);
}
#endif
#ifdef PNG_WRITE_pCAL_SUPPORTED
/* Write the pCAL chunk (described in the PNG extensions document) */
void /* PRIVATE */
png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
- png_int_32 X1, int type, int nparams, png_charp units, png_charpp params)
+ png_int_32 X1, int type, int nparams, png_const_charp units,
+ png_charpp params)
{
PNG_pCAL;
png_size_t purpose_len, units_len, total_len;
total_len = purpose_len + units_len + 10;
params_len = (png_uint_32p)png_malloc(png_ptr,
- (png_alloc_size_t)(nparams * png_sizeof(png_uint_32)));
+ (png_alloc_size_t)(nparams * png_sizeof(png_uint_32)));
/* Find the length of each parameter, making sure we don't count the
- null terminator for the last parameter. */
+ * null terminator for the last parameter.
+ */
for (i = 0; i < nparams; i++)
{
params_len[i] = png_strlen(params[i]) + (i == nparams - 1 ? 0 : 1);
png_debug2(3, "pCAL parameter %d length = %lu", i,
- (unsigned long) params_len[i]);
+ (unsigned long)params_len[i]);
total_len += (png_size_t)params_len[i];
}
png_debug1(3, "pCAL total length = %d", (int)total_len);
- png_write_chunk_start(png_ptr, (png_bytep)png_pCAL, (png_uint_32)total_len);
- png_write_chunk_data(png_ptr, (png_bytep)new_purpose,
- (png_size_t)purpose_len);
+ png_write_chunk_start(png_ptr, png_pCAL, (png_uint_32)total_len);
+ png_write_chunk_data(png_ptr, (png_const_bytep)new_purpose,
+ (png_size_t)purpose_len);
png_save_int_32(buf, X0);
png_save_int_32(buf + 4, X1);
buf[8] = (png_byte)type;
buf[9] = (png_byte)nparams;
png_write_chunk_data(png_ptr, buf, (png_size_t)10);
- png_write_chunk_data(png_ptr, (png_bytep)units, (png_size_t)units_len);
+ png_write_chunk_data(png_ptr, (png_const_bytep)units, (png_size_t)units_len);
png_free(png_ptr, new_purpose);
for (i = 0; i < nparams; i++)
{
- png_write_chunk_data(png_ptr, (png_bytep)params[i],
- (png_size_t)params_len[i]);
+ png_write_chunk_data(png_ptr, (png_const_bytep)params[i],
+ (png_size_t)params_len[i]);
}
png_free(png_ptr, params_len);
#ifdef PNG_WRITE_sCAL_SUPPORTED
/* Write the sCAL chunk */
-#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_STDIO_SUPPORTED)
-void /* PRIVATE */
-png_write_sCAL(png_structp png_ptr, int unit, double width, double height)
-{
- PNG_sCAL;
- char buf[64];
- png_size_t total_len;
-
- png_debug(1, "in png_write_sCAL");
-
- buf[0] = (char)unit;
- png_snprintf(buf + 1, 63, "%12.12e", width);
- total_len = 1 + png_strlen(buf + 1) + 1;
- png_snprintf(buf + total_len, 64-total_len, "%12.12e", height);
- total_len += png_strlen(buf + total_len);
-
- png_debug1(3, "sCAL total length = %u", (unsigned int)total_len);
- png_write_chunk(png_ptr, (png_bytep)png_sCAL, (png_bytep)buf, total_len);
-}
-#else
-#ifdef PNG_FIXED_POINT_SUPPORTED
void /* PRIVATE */
-png_write_sCAL_s(png_structp png_ptr, int unit, png_charp width,
- png_charp height)
+png_write_sCAL_s(png_structp png_ptr, int unit, png_const_charp width,
+ png_const_charp height)
{
PNG_sCAL;
png_byte buf[64];
wlen = png_strlen(width);
hlen = png_strlen(height);
total_len = wlen + hlen + 2;
+
if (total_len > 64)
{
png_warning(png_ptr, "Can't write sCAL (buffer too small)");
png_memcpy(buf + wlen + 2, height, hlen); /* Do NOT append the '\0' here */
png_debug1(3, "sCAL total length = %u", (unsigned int)total_len);
- png_write_chunk(png_ptr, (png_bytep)png_sCAL, buf, total_len);
+ png_write_chunk(png_ptr, png_sCAL, buf, total_len);
}
#endif
-#endif
-#endif
#ifdef PNG_WRITE_pHYs_SUPPORTED
/* Write the pHYs chunk */
void /* PRIVATE */
png_write_pHYs(png_structp png_ptr, png_uint_32 x_pixels_per_unit,
- png_uint_32 y_pixels_per_unit,
- int unit_type)
+ png_uint_32 y_pixels_per_unit,
+ int unit_type)
{
PNG_pHYs;
png_byte buf[9];
png_save_uint_32(buf + 4, y_pixels_per_unit);
buf[8] = (png_byte)unit_type;
- png_write_chunk(png_ptr, (png_bytep)png_pHYs, buf, (png_size_t)9);
+ png_write_chunk(png_ptr, png_pHYs, buf, (png_size_t)9);
}
#endif
* or png_convert_from_time_t(), or fill in the structure yourself.
*/
void /* PRIVATE */
-png_write_tIME(png_structp png_ptr, png_timep mod_time)
+png_write_tIME(png_structp png_ptr, png_const_timep mod_time)
{
PNG_tIME;
png_byte buf[7];
buf[5] = mod_time->minute;
buf[6] = mod_time->second;
- png_write_chunk(png_ptr, (png_bytep)png_tIME, buf, (png_size_t)7);
+ png_write_chunk(png_ptr, png_tIME, buf, (png_size_t)7);
}
#endif
png_debug(1, "in png_write_start_row");
buf_size = (png_size_t)(PNG_ROWBYTES(
- png_ptr->usr_channels*png_ptr->usr_bit_depth, png_ptr->width) + 1);
+ png_ptr->usr_channels*png_ptr->usr_bit_depth, png_ptr->width) + 1);
/* Set up row buffer */
png_ptr->row_buf = (png_bytep)png_malloc(png_ptr,
- (png_alloc_size_t)buf_size);
+ (png_alloc_size_t)buf_size);
+
png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
#ifdef PNG_WRITE_FILTER_SUPPORTED
/* Set up filtering buffer, if using this filter */
if (png_ptr->do_filter & PNG_FILTER_SUB)
{
- png_ptr->sub_row = (png_bytep)png_malloc(png_ptr,
- (png_alloc_size_t)(png_ptr->rowbytes + 1));
+ png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, png_ptr->rowbytes + 1);
+
png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB;
}
{
/* Set up previous row buffer */
png_ptr->prev_row = (png_bytep)png_calloc(png_ptr,
- (png_alloc_size_t)buf_size);
+ (png_alloc_size_t)buf_size);
if (png_ptr->do_filter & PNG_FILTER_UP)
{
png_ptr->up_row = (png_bytep)png_malloc(png_ptr,
- (png_size_t)(png_ptr->rowbytes + 1));
+ png_ptr->rowbytes + 1);
+
png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
}
if (png_ptr->do_filter & PNG_FILTER_AVG)
{
png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
- (png_alloc_size_t)(png_ptr->rowbytes + 1));
+ png_ptr->rowbytes + 1);
+
png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
}
if (png_ptr->do_filter & PNG_FILTER_PAETH)
{
png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr,
- (png_size_t)(png_ptr->rowbytes + 1));
+ png_ptr->rowbytes + 1);
+
png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
}
}
if (!(png_ptr->transformations & PNG_INTERLACE))
{
png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
- png_pass_ystart[0]) / png_pass_yinc[0];
+ png_pass_ystart[0]) / png_pass_yinc[0];
+
png_ptr->usr_width = (png_ptr->width + png_pass_inc[0] - 1 -
- png_pass_start[0]) / png_pass_inc[0];
+ png_pass_start[0]) / png_pass_inc[0];
}
+
else
{
png_ptr->num_rows = png_ptr->height;
png_ptr->usr_width = png_ptr->width;
}
}
+
else
#endif
{
png_ptr->num_rows = png_ptr->height;
png_ptr->usr_width = png_ptr->width;
}
+
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
png_ptr->zstream.next_out = png_ptr->zbuf;
}
{
png_ptr->pass++;
}
+
else
{
/* Loop until we find a non-zero width or height pass */
do
{
png_ptr->pass++;
+
if (png_ptr->pass >= 7)
break;
+
png_ptr->usr_width = (png_ptr->width +
- png_pass_inc[png_ptr->pass] - 1 -
- png_pass_start[png_ptr->pass]) /
- png_pass_inc[png_ptr->pass];
+ png_pass_inc[png_ptr->pass] - 1 -
+ png_pass_start[png_ptr->pass]) /
+ png_pass_inc[png_ptr->pass];
+
png_ptr->num_rows = (png_ptr->height +
- png_pass_yinc[png_ptr->pass] - 1 -
- png_pass_ystart[png_ptr->pass]) /
- png_pass_yinc[png_ptr->pass];
+ png_pass_yinc[png_ptr->pass] - 1 -
+ png_pass_ystart[png_ptr->pass]) /
+ png_pass_yinc[png_ptr->pass];
+
if (png_ptr->transformations & PNG_INTERLACE)
break;
+
} while (png_ptr->usr_width == 0 || png_ptr->num_rows == 0);
}
{
if (png_ptr->prev_row != NULL)
png_memset(png_ptr->prev_row, 0,
- (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels*
- png_ptr->usr_bit_depth, png_ptr->width)) + 1);
+ (png_size_t)(PNG_ROWBYTES(png_ptr->usr_channels*
+ png_ptr->usr_bit_depth, png_ptr->width)) + 1);
+
return;
}
}
{
/* Tell the compressor we are done */
ret = deflate(&png_ptr->zstream, Z_FINISH);
+
/* Check for an error */
if (ret == Z_OK)
{
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
}
}
+
else if (ret != Z_STREAM_END)
{
if (png_ptr->zstream.msg != NULL)
png_error(png_ptr, png_ptr->zstream.msg);
+
else
png_error(png_ptr, "zlib error");
}
if (png_ptr->zstream.avail_out < png_ptr->zbuf_size)
{
png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size -
- png_ptr->zstream.avail_out);
+ png_ptr->zstream.avail_out);
}
deflateReset(&png_ptr->zstream);
dp = row;
d = 0;
shift = 7;
+
for (i = png_pass_start[pass]; i < row_width;
i += png_pass_inc[pass])
{
*dp++ = (png_byte)d;
d = 0;
}
+
else
shift--;
}
if (shift != 7)
*dp = (png_byte)d;
+
break;
}
+
case 2:
{
png_bytep sp;
dp = row;
shift = 6;
d = 0;
+
for (i = png_pass_start[pass]; i < row_width;
i += png_pass_inc[pass])
{
*dp++ = (png_byte)d;
d = 0;
}
+
else
shift -= 2;
}
if (shift != 6)
- *dp = (png_byte)d;
+ *dp = (png_byte)d;
+
break;
}
+
case 4:
{
png_bytep sp;
shift = 4;
d = 0;
for (i = png_pass_start[pass]; i < row_width;
- i += png_pass_inc[pass])
+ i += png_pass_inc[pass])
{
sp = row + (png_size_t)(i >> 1);
value = (*sp >> ((1 - (int)(i & 0x01)) << 2)) & 0x0f;
*dp++ = (png_byte)d;
d = 0;
}
+
else
shift -= 4;
}
if (shift != 4)
*dp = (png_byte)d;
+
break;
}
+
default:
{
png_bytep sp;
/* Start at the beginning */
dp = row;
+
/* Find out how many bytes each pixel takes up */
pixel_bytes = (row_info->pixel_depth >> 3);
- /* Loop through the row, only looking at the pixels that
- matter */
+
+ /* Loop through the row, only looking at the pixels that matter */
for (i = png_pass_start[pass]; i < row_width;
i += png_pass_inc[pass])
{
/* Find out where the original pixel is */
sp = row + (png_size_t)i * pixel_bytes;
+
/* Move the pixel */
if (dp != sp)
png_memcpy(dp, sp, pixel_bytes);
+
/* Next pixel */
dp += pixel_bytes;
}
}
/* Set new row width */
row_info->width = (row_info->width +
- png_pass_inc[pass] - 1 -
- png_pass_start[pass]) /
- png_pass_inc[pass];
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
- row_info->width);
+ png_pass_inc[pass] - 1 -
+ png_pass_start[pass]) /
+ png_pass_inc[pass];
+
+ row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
+ row_info->width);
}
}
#endif
png_bytep prev_row, row_buf;
png_uint_32 mins, bpp;
png_byte filter_to_do = png_ptr->do_filter;
- png_uint_32 row_bytes = row_info->rowbytes;
+ png_size_t row_bytes = row_info->rowbytes;
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
int num_p_filters = (int)png_ptr->num_prev_filters;
#endif
#ifndef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS)
{
- /* These will never be selected so we need not test them. */
- filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH);
+ /* These will never be selected so we need not test them. */
+ filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH);
}
#endif
* computationally expensive).
*
* GRR 980525: consider also
+ *
* (1) minimum sum of absolute differences from running average (i.e.,
* keep running sum of non-absolute differences & count of bytes)
* [track dispersion, too? restart average if dispersion too large?]
+ *
* (1b) minimum sum of absolute differences from sliding average, probably
* with window size <= deflate window (usually 32K)
+ *
* (2) minimum sum of squared differences from zero or running average
* (i.e., ~ root-mean-square approach)
*/
/* We don't need to test the 'no filter' case if this is the only filter
* that has been chosen, as it doesn't actually do anything to the data.
*/
- if ((filter_to_do & PNG_FILTER_NONE) &&
- filter_to_do != PNG_FILTER_NONE)
+ if ((filter_to_do & PNG_FILTER_NONE) && filter_to_do != PNG_FILTER_NONE)
{
png_bytep rp;
png_uint_32 sum = 0;
- png_uint_32 i;
+ png_size_t i;
int v;
for (i = 0, rp = row_buf + 1; i < row_bytes; i++, rp++)
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
{
sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
+
sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
}
}
* it has the minimum possible computational cost - none).
*/
sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
+
sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
if (sumhi > PNG_HIMASK)
sum = PNG_MAXSUM;
+
else
sum = (sumhi << PNG_HISHIFT) + sumlo;
}
/* It's the only filter so no testing is needed */
{
png_bytep rp, lp, dp;
- png_uint_32 i;
+ png_size_t i;
+
for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp;
i++, rp++, dp++)
{
*dp = *rp;
}
+
for (lp = row_buf + 1; i < row_bytes;
i++, rp++, lp++, dp++)
{
*dp = (png_byte)(((int)*rp - (int)*lp) & 0xff);
}
+
best_row = png_ptr->sub_row;
}
{
png_bytep rp, dp, lp;
png_uint_32 sum = 0, lmins = mins;
- png_uint_32 i;
+ png_size_t i;
int v;
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
{
lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
+
lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
}
}
lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
+
lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
if (lmhi > PNG_HIMASK)
lmins = PNG_MAXSUM;
+
else
lmins = (lmhi << PNG_HISHIFT) + lmlo;
}
sum += (v < 128) ? v : 256 - v;
}
+
for (lp = row_buf + 1; i < row_bytes;
i++, rp++, lp++, dp++)
{
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
{
sumlo = (sumlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
+
sumhi = (sumhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
}
}
sumlo = (sumlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
+
sumhi = (sumhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
if (sumhi > PNG_HIMASK)
sum = PNG_MAXSUM;
+
else
sum = (sumhi << PNG_HISHIFT) + sumlo;
}
if (filter_to_do == PNG_FILTER_UP)
{
png_bytep rp, dp, pp;
- png_uint_32 i;
+ png_size_t i;
for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
- pp = prev_row + 1; i < row_bytes;
- i++, rp++, pp++, dp++)
+ pp = prev_row + 1; i < row_bytes;
+ i++, rp++, pp++, dp++)
{
*dp = (png_byte)(((int)*rp - (int)*pp) & 0xff);
}
+
best_row = png_ptr->up_row;
}
{
png_bytep rp, dp, pp;
png_uint_32 sum = 0, lmins = mins;
- png_uint_32 i;
+ png_size_t i;
int v;
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
{
lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
+
lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
}
}
lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
+
lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
if (lmhi > PNG_HIMASK)
lmins = PNG_MAXSUM;
+
else
lmins = (lmhi << PNG_HISHIFT) + lmlo;
}
#endif
for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
- pp = prev_row + 1; i < row_bytes; i++)
+ pp = prev_row + 1; i < row_bytes; i++)
{
v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
{
sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
+
sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
}
}
sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
+
sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
if (sumhi > PNG_HIMASK)
sum = PNG_MAXSUM;
+
else
sum = (sumhi << PNG_HISHIFT) + sumlo;
}
{
png_bytep rp, dp, pp, lp;
png_uint_32 i;
+
for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
pp = prev_row + 1; i < bpp; i++)
{
*dp++ = (png_byte)(((int)*rp++ - ((int)*pp++ / 2)) & 0xff);
}
+
for (lp = row_buf + 1; i < row_bytes; i++)
{
*dp++ = (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2))
{
png_bytep rp, dp, pp, lp;
png_uint_32 sum = 0, lmins = mins;
- png_uint_32 i;
+ png_size_t i;
int v;
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_AVG)
{
lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
+
lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
}
}
lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
+
lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
if (lmhi > PNG_HIMASK)
lmins = PNG_MAXSUM;
+
else
lmins = (lmhi << PNG_HISHIFT) + lmlo;
}
sum += (v < 128) ? v : 256 - v;
}
+
for (lp = row_buf + 1; i < row_bytes; i++)
{
v = *dp++ =
- (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) & 0xff);
+ (png_byte)(((int)*rp++ - (((int)*pp++ + (int)*lp++) / 2)) & 0xff);
sum += (v < 128) ? v : 256 - v;
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
{
sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
+
sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
}
}
sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
+
sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
if (sumhi > PNG_HIMASK)
sum = PNG_MAXSUM;
+
else
sum = (sumhi << PNG_HISHIFT) + sumlo;
}
if (filter_to_do == PNG_FILTER_PAETH)
{
png_bytep rp, dp, pp, cp, lp;
- png_uint_32 i;
+ png_size_t i;
+
for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
- pp = prev_row + 1; i < bpp; i++)
+ pp = prev_row + 1; i < bpp; i++)
{
*dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
}
{
png_bytep rp, dp, pp, cp, lp;
png_uint_32 sum = 0, lmins = mins;
- png_uint_32 i;
+ png_size_t i;
int v;
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
{
lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
+
lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
}
}
lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
+
lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
if (lmhi > PNG_HIMASK)
lmins = PNG_MAXSUM;
+
else
lmins = (lmhi << PNG_HISHIFT) + lmlo;
}
#endif
for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
- pp = prev_row + 1; i < bpp; i++)
+ pp = prev_row + 1; i < bpp; i++)
{
v = *dp++ = (png_byte)(((int)*rp++ - (int)*pp++) & 0xff);
pa = abs(p - a);
pb = abs(p - b);
pc = abs(p - c);
+
if (pa <= pb && pa <= pc)
p = a;
+
else if (pb <= pc)
p = b;
+
else
p = c;
#endif /* PNG_SLOW_PAETH */
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
{
sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
+
sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
+ PNG_WEIGHT_SHIFT;
}
}
sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
+
sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
+ PNG_COST_SHIFT;
if (sumhi > PNG_HIMASK)
sum = PNG_MAXSUM;
+
else
sum = (sumhi << PNG_HISHIFT) + sumlo;
}
if (png_ptr->num_prev_filters > 0)
{
int j;
+
for (j = 1; j < num_p_filters; j++)
{
png_ptr->prev_filters[j] = png_ptr->prev_filters[j - 1];
}
+
png_ptr->prev_filters[j] = best_row[0];
}
#endif
void /* PRIVATE */
png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row)
{
+ png_size_t avail;
+
png_debug(1, "in png_write_filtered_row");
png_debug1(2, "filter = %d", filtered_row[0]);
/* Set up the zlib input buffer */
png_ptr->zstream.next_in = filtered_row;
- png_ptr->zstream.avail_in = (uInt)png_ptr->row_info.rowbytes + 1;
+ png_ptr->zstream.avail_in = 0;
+ avail = png_ptr->row_info.rowbytes + 1;
/* Repeat until we have compressed all the data */
do
{
int ret; /* Return of zlib */
+ /* Record the number of bytes available - zlib supports at least 65535
+ * bytes at one step, depending on the size of the zlib type 'uInt', the
+ * maximum size zlib can write at once is ZLIB_IO_MAX (from pngpriv.h).
+ * Use this because on 16 bit systems 'rowbytes' can be up to 65536 (i.e.
+ * one more than 16 bits) and, in this case 'rowbytes+1' can overflow a
+ * uInt. ZLIB_IO_MAX can be safely reduced to cause zlib to be called
+ * with smaller chunks of data.
+ */
+ if (png_ptr->zstream.avail_in == 0)
+ {
+ if (avail > ZLIB_IO_MAX)
+ {
+ png_ptr->zstream.avail_in = ZLIB_IO_MAX;
+ avail -= ZLIB_IO_MAX;
+ }
+
+ else
+ {
+ /* So this will fit in the available uInt space: */
+ png_ptr->zstream.avail_in = (uInt)avail;
+ avail = 0;
+ }
+ }
+
/* Compress the data */
ret = deflate(&png_ptr->zstream, Z_NO_FLUSH);
+
/* Check for compression errors */
if (ret != Z_OK)
{
if (png_ptr->zstream.msg != NULL)
png_error(png_ptr, png_ptr->zstream.msg);
+
else
png_error(png_ptr, "zlib error");
}
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
}
/* Repeat until all data has been compressed */
- } while (png_ptr->zstream.avail_in);
+ } while (avail > 0 || png_ptr->zstream.avail_in > 0);
/* Swap the current and previous rows */
if (png_ptr->prev_row != NULL)
projects / tools / apitrace.git / commitdiff