2 /* pngtest.c - a simple test program to test libpng
4 * Copyright (c) 2018-2019 Cosmin Truta
5 * Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson
6 * Copyright (c) 1996-1997 Andreas Dilger
7 * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
9 * This code is released under the libpng license.
10 * For conditions of distribution and use, see the disclaimer
11 * and license in png.h
13 * This program reads in a PNG image, writes it out again, and then
14 * compares the two files. If the files are identical, this shows that
15 * the basic chunk handling, filtering, and (de)compression code is working
16 * properly. It does not currently test all of the transforms, although
19 * The program will report "FAIL" in certain legitimate cases:
20 * 1) when the compression level or filter selection method is changed.
21 * 2) when the maximum IDAT size (PNG_ZBUF_SIZE in pngconf.h) is not 8192.
22 * 3) unknown unsafe-to-copy ancillary chunks or unknown critical chunks
23 * exist in the input file.
24 * 4) others not listed here...
25 * In these cases, it is best to check with another tool such as "pngcheck"
26 * to see what the differences between the two files are.
28 * If a filename is given on the command-line, then this file is used
29 * for the input, rather than the default "pngtest.png". This allows
30 * testing a wide variety of files easily. You can also test a number
31 * of files at once by typing "pngtest -m file1.png file2.png ..."
34 #define _POSIX_SOURCE 1
40 /* Defined so I can write to a file on gui/windowing platforms */
41 /* #define STDERR stderr */
42 #define STDERR stdout /* For DOS */
46 /* Known chunks that exist in pngtest.png must be supported or pngtest will fail
47 * simply as a result of re-ordering them. This may be fixed in 1.7
49 * pngtest allocates a single row buffer for each row and overwrites it,
50 * therefore if the write side doesn't support the writing of interlaced images
51 * nothing can be done for an interlaced image (and the code below will fail
52 * horribly trying to write extra data after writing garbage).
54 #if defined PNG_READ_SUPPORTED && /* else nothing can be done */\
55 defined PNG_READ_bKGD_SUPPORTED &&\
56 defined PNG_READ_cHRM_SUPPORTED &&\
57 defined PNG_READ_gAMA_SUPPORTED &&\
58 defined PNG_READ_oFFs_SUPPORTED &&\
59 defined PNG_READ_pCAL_SUPPORTED &&\
60 defined PNG_READ_pHYs_SUPPORTED &&\
61 defined PNG_READ_sBIT_SUPPORTED &&\
62 defined PNG_READ_sCAL_SUPPORTED &&\
63 defined PNG_READ_sRGB_SUPPORTED &&\
64 defined PNG_READ_sPLT_SUPPORTED &&\
65 defined PNG_READ_tEXt_SUPPORTED &&\
66 defined PNG_READ_tIME_SUPPORTED &&\
67 defined PNG_READ_zTXt_SUPPORTED &&\
68 (defined PNG_WRITE_INTERLACING_SUPPORTED || PNG_LIBPNG_VER >= 10700)
70 #ifdef PNG_ZLIB_HEADER
71 # include PNG_ZLIB_HEADER /* defined by pnglibconf.h from 1.7 */
76 /* Copied from pngpriv.h but only used in error messages below. */
78 # define PNG_ZBUF_SIZE 8192
80 #define FCLOSE(file) fclose(file)
82 #ifndef PNG_STDIO_SUPPORTED
83 typedef FILE * png_FILE_p;
86 /* Makes pngtest verbose so we can find problems. */
92 # define pngtest_debug(m) ((void)fprintf(stderr, m "\n"))
93 # define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1))
94 # define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
96 # define pngtest_debug(m) ((void)0)
97 # define pngtest_debug1(m,p1) ((void)0)
98 # define pngtest_debug2(m,p1,p2) ((void)0)
102 # define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */
106 # define PNG_UNUSED(param) (void)param;
109 /* Turn on CPU timing
110 #define PNGTEST_TIMING
113 #ifndef PNG_FLOATING_POINT_SUPPORTED
114 #undef PNGTEST_TIMING
117 #ifdef PNGTEST_TIMING
118 static float t_start, t_stop, t_decode, t_encode, t_misc;
122 #ifdef PNG_TIME_RFC1123_SUPPORTED
123 #define PNG_tIME_STRING_LENGTH 29
124 static int tIME_chunk_present = 0;
125 static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
127 #if PNG_LIBPNG_VER < 10619
128 #define png_convert_to_rfc1123_buffer(ts, t) tIME_to_str(read_ptr, ts, t)
131 tIME_to_str(png_structp png_ptr, png_charp ts, png_const_timep t)
133 png_const_charp str = png_convert_to_rfc1123(png_ptr, t);
141 #endif /* older libpng */
144 static int verbose = 0;
145 static int strict = 0;
146 static int relaxed = 0;
147 static int xfail = 0;
148 static int unsupported_chunks = 0; /* chunk unsupported by libpng in input */
149 static int error_count = 0; /* count calls to png_error */
150 static int warning_count = 0; /* count calls to png_warning */
152 /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
154 # define png_jmpbuf(png_ptr) png_ptr->jmpbuf
157 /* Defines for unknown chunk handling if required. */
158 #ifndef PNG_HANDLE_CHUNK_ALWAYS
159 # define PNG_HANDLE_CHUNK_ALWAYS 3
161 #ifndef PNG_HANDLE_CHUNK_IF_SAFE
162 # define PNG_HANDLE_CHUNK_IF_SAFE 2
165 /* Utility to save typing/errors, the argument must be a name */
166 #define MEMZERO(var) ((void)memset(&var, 0, sizeof var))
168 /* Example of using row callbacks to make a simple progress meter */
169 static int status_pass = 1;
170 static int status_dots_requested = 0;
171 static int status_dots = 1;
174 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
176 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX)
179 if (status_pass != pass)
181 fprintf(stdout, "\n Pass %d: ", pass);
188 if (status_dots == 0)
190 fprintf(stdout, "\n ");
194 fprintf(stdout, "r");
197 #ifdef PNG_WRITE_SUPPORTED
199 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
201 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7)
204 fprintf(stdout, "w");
209 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
210 /* Example of using a user transform callback (doesn't do anything at present).
213 read_user_callback(png_structp png_ptr, png_row_infop row_info, png_bytep data)
221 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
222 /* Example of using user transform callback (we don't transform anything,
223 * but merely count the zero samples)
226 static png_uint_32 zero_samples;
229 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
235 /* Contents of row_info:
236 * png_uint_32 width width of row
237 * png_uint_32 rowbytes number of bytes in row
238 * png_byte color_type color type of pixels
239 * png_byte bit_depth bit depth of samples
240 * png_byte channels number of channels (1-4)
241 * png_byte pixel_depth bits per pixel (depth*channels)
244 /* Counts the number of zero samples (or zero pixels if color_type is 3 */
246 if (row_info->color_type == 0 || row_info->color_type == 3)
249 png_uint_32 n, nstop;
251 for (n = 0, nstop=row_info->width; n<nstop; n++)
253 if (row_info->bit_depth == 1)
255 if (((*dp << pos++ ) & 0x80) == 0)
265 if (row_info->bit_depth == 2)
267 if (((*dp << (pos+=2)) & 0xc0) == 0)
277 if (row_info->bit_depth == 4)
279 if (((*dp << (pos+=4)) & 0xf0) == 0)
289 if (row_info->bit_depth == 8)
293 if (row_info->bit_depth == 16)
295 if ((*dp | *(dp+1)) == 0)
301 else /* Other color types */
303 png_uint_32 n, nstop;
305 int color_channels = row_info->channels;
306 if (row_info->color_type > 3)
309 for (n = 0, nstop=row_info->width; n<nstop; n++)
311 for (channel = 0; channel < color_channels; channel++)
313 if (row_info->bit_depth == 8)
317 if (row_info->bit_depth == 16)
319 if ((*dp | *(dp+1)) == 0)
325 if (row_info->color_type > 3)
328 if (row_info->bit_depth == 16)
334 #endif /* WRITE_USER_TRANSFORM */
336 #ifndef PNG_STDIO_SUPPORTED
337 /* START of code to validate stdio-free compilation */
338 /* These copies of the default read/write functions come from pngrio.c and
339 * pngwio.c. They allow "don't include stdio" testing of the library.
340 * This is the function that does the actual reading of data. If you are
341 * not reading from a standard C stream, you should create a replacement
342 * read_data function and use it at run time with png_set_read_fn(), rather
343 * than changing the library.
346 #ifdef PNG_IO_STATE_SUPPORTED
348 pngtest_check_io_state(png_structp png_ptr, size_t data_length,
351 pngtest_check_io_state(png_structp png_ptr, size_t data_length,
354 png_uint_32 io_state = png_get_io_state(png_ptr);
357 /* Check if the current operation (reading / writing) is as expected. */
358 if ((io_state & PNG_IO_MASK_OP) != io_op)
359 png_error(png_ptr, "Incorrect operation in I/O state");
361 /* Check if the buffer size specific to the current location
362 * (file signature / header / data / crc) is as expected.
364 switch (io_state & PNG_IO_MASK_LOC)
366 case PNG_IO_SIGNATURE:
370 case PNG_IO_CHUNK_HDR:
371 if (data_length != 8)
374 case PNG_IO_CHUNK_DATA:
375 break; /* no restrictions here */
376 case PNG_IO_CHUNK_CRC:
377 if (data_length != 4)
381 err = 1; /* uninitialized */
384 png_error(png_ptr, "Bad I/O state or buffer size");
389 pngtest_read_data(png_structp png_ptr, png_bytep data, size_t length)
394 /* fread() returns 0 on error, so it is OK to store this in a size_t
395 * instead of an int, which is what fread() actually returns.
397 io_ptr = png_get_io_ptr(png_ptr);
400 check = fread(data, 1, length, (png_FILE_p)io_ptr);
405 png_error(png_ptr, "Read Error");
408 #ifdef PNG_IO_STATE_SUPPORTED
409 pngtest_check_io_state(png_ptr, length, PNG_IO_READING);
413 #ifdef PNG_WRITE_FLUSH_SUPPORTED
415 pngtest_flush(png_structp png_ptr)
417 /* Do nothing; fflush() is said to be just a waste of energy. */
418 PNG_UNUSED(png_ptr) /* Stifle compiler warning */
422 /* This is the function that does the actual writing of data. If you are
423 * not writing to a standard C stream, you should create a replacement
424 * write_data function and use it at run time with png_set_write_fn(), rather
425 * than changing the library.
428 pngtest_write_data(png_structp png_ptr, png_bytep data, size_t length)
432 check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr));
436 png_error(png_ptr, "Write Error");
439 #ifdef PNG_IO_STATE_SUPPORTED
440 pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
445 /* This function is called when there is a warning, but the library thinks
446 * it can continue anyway. Replacement functions don't have to do anything
447 * here if you don't want to. In the default configuration, png_ptr is
448 * not used, but it is passed in case it may be useful.
452 const char *file_name;
453 } pngtest_error_parameters;
456 pngtest_warning(png_structp png_ptr, png_const_charp message)
458 const char *name = "UNKNOWN (ERROR!)";
459 pngtest_error_parameters *test =
460 (pngtest_error_parameters*)png_get_error_ptr(png_ptr);
464 if (test != NULL && test->file_name != NULL)
465 name = test->file_name;
467 fprintf(STDERR, "\n%s: libpng warning: %s\n", name, message);
470 /* This is the default error handling function. Note that replacements for
471 * this function MUST NOT RETURN, or the program will likely crash. This
472 * function is used by default, or if the program supplies NULL for the
473 * error function pointer in png_set_error_fn().
476 pngtest_error(png_structp png_ptr, png_const_charp message)
480 pngtest_warning(png_ptr, message);
481 /* We can return because png_error calls the default handler, which is
482 * actually OK in this case.
486 /* END of code to validate stdio-free compilation */
488 /* START of code to validate memory allocation and deallocation */
489 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
491 /* Allocate memory. For reasonable files, size should never exceed
492 * 64K. However, zlib may allocate more than 64K if you don't tell
493 * it not to. See zconf.h and png.h for more information. zlib does
494 * need to allocate exactly 64K, so whatever you call here must
495 * have the ability to do that.
497 * This piece of code can be compiled to validate max 64K allocations
498 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
500 typedef struct memory_information
502 png_alloc_size_t size;
504 struct memory_information *next;
505 } memory_information;
506 typedef memory_information *memory_infop;
508 static memory_infop pinformation = NULL;
509 static int current_allocation = 0;
510 static int maximum_allocation = 0;
511 static int total_allocation = 0;
512 static int num_allocations = 0;
514 png_voidp PNGCBAPI png_debug_malloc PNGARG((png_structp png_ptr,
515 png_alloc_size_t size));
516 void PNGCBAPI png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));
519 PNGCBAPI png_debug_malloc(png_structp png_ptr, png_alloc_size_t size)
522 /* png_malloc has already tested for NULL; png_create_struct calls
523 * png_debug_malloc directly, with png_ptr == NULL which is OK
529 /* This calls the library allocator twice, once to get the requested
530 buffer and once to get a new free list entry. */
532 /* Disable malloc_fn and free_fn */
534 png_set_mem_fn(png_ptr, NULL, NULL, NULL);
535 pinfo = (memory_infop)png_malloc(png_ptr,
538 current_allocation += size;
539 total_allocation += size;
542 if (current_allocation > maximum_allocation)
543 maximum_allocation = current_allocation;
545 pinfo->pointer = png_malloc(png_ptr, size);
546 /* Restore malloc_fn and free_fn */
548 png_set_mem_fn(png_ptr,
549 NULL, png_debug_malloc, png_debug_free);
551 if (size != 0 && pinfo->pointer == NULL)
553 current_allocation -= size;
554 total_allocation -= size;
556 "out of memory in pngtest->png_debug_malloc");
559 pinfo->next = pinformation;
560 pinformation = pinfo;
561 /* Make sure the caller isn't assuming zeroed memory. */
562 memset(pinfo->pointer, 0xdd, pinfo->size);
565 printf("png_malloc %lu bytes at %p\n", (unsigned long)size,
568 return (png_voidp)(pinfo->pointer);
572 /* Free a pointer. It is removed from the list at the same time. */
574 png_debug_free(png_structp png_ptr, png_voidp ptr)
577 fprintf(STDERR, "NULL pointer to png_debug_free.\n");
581 #if 0 /* This happens all the time. */
582 fprintf(STDERR, "WARNING: freeing NULL pointer\n");
587 /* Unlink the element from the list. */
588 if (pinformation != NULL)
590 memory_infop *ppinfo = &pinformation;
594 memory_infop pinfo = *ppinfo;
596 if (pinfo->pointer == ptr)
598 *ppinfo = pinfo->next;
599 current_allocation -= pinfo->size;
600 if (current_allocation < 0)
601 fprintf(STDERR, "Duplicate free of memory\n");
602 /* We must free the list element too, but first kill
603 the memory that is to be freed. */
604 memset(ptr, 0x55, pinfo->size);
610 if (pinfo->next == NULL)
612 fprintf(STDERR, "Pointer %p not found\n", ptr);
616 ppinfo = &pinfo->next;
620 /* Finally free the data. */
622 printf("Freeing %p\n", ptr);
628 #endif /* USER_MEM && DEBUG */
629 /* END of code to test memory allocation/deallocation */
632 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
633 /* Demonstration of user chunk support of the sTER and vpAg chunks */
635 /* (sTER is a public chunk not yet known by libpng. vpAg is a private
636 chunk used in ImageMagick to store "virtual page" size). */
638 static struct user_chunk_data
640 png_const_infop info_ptr;
641 png_uint_32 vpAg_width, vpAg_height;
648 /* Used for location and order; zero means nothing. */
649 #define have_sTER 0x01
650 #define have_vpAg 0x02
651 #define before_PLTE 0x10
652 #define before_IDAT 0x20
653 #define after_IDAT 0x40
656 init_callback_info(png_const_infop info_ptr)
658 MEMZERO(user_chunk_data);
659 user_chunk_data.info_ptr = info_ptr;
663 set_location(png_structp png_ptr, struct user_chunk_data *data, int what)
667 if ((data->location[0] & what) != 0 || (data->location[1] & what) != 0)
668 return 0; /* already have one of these */
670 /* Find where we are (the code below zeroes info_ptr to indicate that the
671 * chunks before the first IDAT have been read.)
673 if (data->info_ptr == NULL) /* after IDAT */
674 location = what | after_IDAT;
676 else if (png_get_valid(png_ptr, data->info_ptr, PNG_INFO_PLTE) != 0)
677 location = what | before_IDAT;
680 location = what | before_PLTE;
682 if (data->location[0] == 0)
683 data->location[0] = location;
686 data->location[1] = location;
688 return 1; /* handled */
692 read_user_chunk_callback(png_struct *png_ptr, png_unknown_chunkp chunk)
694 struct user_chunk_data *my_user_chunk_data =
695 (struct user_chunk_data*)png_get_user_chunk_ptr(png_ptr);
697 if (my_user_chunk_data == NULL)
698 png_error(png_ptr, "lost user chunk pointer");
700 /* Return one of the following:
701 * return (-n); chunk had an error
702 * return (0); did not recognize
703 * return (n); success
705 * The unknown chunk structure contains the chunk data:
710 * Note that libpng has already taken care of the CRC handling.
713 if (chunk->name[0] == 115 && chunk->name[1] == 84 && /* s T */
714 chunk->name[2] == 69 && chunk->name[3] == 82) /* E R */
716 /* Found sTER chunk */
717 if (chunk->size != 1)
718 return (-1); /* Error return */
720 if (chunk->data[0] != 0 && chunk->data[0] != 1)
721 return (-1); /* Invalid mode */
723 if (set_location(png_ptr, my_user_chunk_data, have_sTER) != 0)
725 my_user_chunk_data->sTER_mode=chunk->data[0];
730 return (0); /* duplicate sTER - give it to libpng */
733 if (chunk->name[0] != 118 || chunk->name[1] != 112 || /* v p */
734 chunk->name[2] != 65 || chunk->name[3] != 103) /* A g */
735 return (0); /* Did not recognize */
737 /* Found ImageMagick vpAg chunk */
739 if (chunk->size != 9)
740 return (-1); /* Error return */
742 if (set_location(png_ptr, my_user_chunk_data, have_vpAg) == 0)
743 return (0); /* duplicate vpAg */
745 my_user_chunk_data->vpAg_width = png_get_uint_31(png_ptr, chunk->data);
746 my_user_chunk_data->vpAg_height = png_get_uint_31(png_ptr, chunk->data + 4);
747 my_user_chunk_data->vpAg_units = chunk->data[8];
752 #ifdef PNG_WRITE_SUPPORTED
754 write_sTER_chunk(png_structp write_ptr)
756 png_byte sTER[5] = {115, 84, 69, 82, '\0'};
759 fprintf(STDERR, "\n stereo mode = %d\n", user_chunk_data.sTER_mode);
761 png_write_chunk(write_ptr, sTER, &user_chunk_data.sTER_mode, 1);
765 write_vpAg_chunk(png_structp write_ptr)
767 png_byte vpAg[5] = {118, 112, 65, 103, '\0'};
769 png_byte vpag_chunk_data[9];
772 fprintf(STDERR, " vpAg = %lu x %lu, units = %d\n",
773 (unsigned long)user_chunk_data.vpAg_width,
774 (unsigned long)user_chunk_data.vpAg_height,
775 user_chunk_data.vpAg_units);
777 png_save_uint_32(vpag_chunk_data, user_chunk_data.vpAg_width);
778 png_save_uint_32(vpag_chunk_data + 4, user_chunk_data.vpAg_height);
779 vpag_chunk_data[8] = user_chunk_data.vpAg_units;
780 png_write_chunk(write_ptr, vpAg, vpag_chunk_data, 9);
784 write_chunks(png_structp write_ptr, int location)
788 /* Notice that this preserves the original chunk order, however chunks
789 * intercepted by the callback will be written *after* chunks passed to
790 * libpng. This will actually reverse a pair of sTER chunks or a pair of
791 * vpAg chunks, resulting in an error later. This is not worth worrying
792 * about - the chunks should not be duplicated!
796 if (user_chunk_data.location[i] == (location | have_sTER))
797 write_sTER_chunk(write_ptr);
799 else if (user_chunk_data.location[i] == (location | have_vpAg))
800 write_vpAg_chunk(write_ptr);
804 #else /* !READ_USER_CHUNKS */
805 # define write_chunks(pp,loc) ((void)0)
807 /* END of code to demonstrate user chunk support */
809 /* START of code to check that libpng has the required text support; this only
810 * checks for the write support because if read support is missing the chunk
811 * will simply not be reported back to pngtest.
813 #ifdef PNG_TEXT_SUPPORTED
815 pngtest_check_text_support(png_structp png_ptr, png_textp text_ptr,
820 switch (text_ptr[--num_text].compression)
822 case PNG_TEXT_COMPRESSION_NONE:
825 case PNG_TEXT_COMPRESSION_zTXt:
826 # ifndef PNG_WRITE_zTXt_SUPPORTED
827 ++unsupported_chunks;
828 /* In libpng 1.7 this now does an app-error, so stop it: */
829 text_ptr[num_text].compression = PNG_TEXT_COMPRESSION_NONE;
833 case PNG_ITXT_COMPRESSION_NONE:
834 case PNG_ITXT_COMPRESSION_zTXt:
835 # ifndef PNG_WRITE_iTXt_SUPPORTED
836 ++unsupported_chunks;
837 text_ptr[num_text].compression = PNG_TEXT_COMPRESSION_NONE;
842 /* This is an error */
843 png_error(png_ptr, "invalid text chunk compression field");
849 /* END of code to check that libpng has the required text support */
853 test_one_file(const char *inname, const char *outname)
855 static png_FILE_p fpin;
856 static png_FILE_p fpout; /* "static" prevents setjmp corruption */
857 pngtest_error_parameters error_parameters;
858 png_structp read_ptr;
859 png_infop read_info_ptr, end_info_ptr;
860 #ifdef PNG_WRITE_SUPPORTED
861 png_structp write_ptr;
862 png_infop write_info_ptr;
863 png_infop write_end_info_ptr;
864 #ifdef PNG_WRITE_FILTER_SUPPORTED
865 int interlace_preserved = 1;
866 #endif /* WRITE_FILTER */
868 png_structp write_ptr = NULL;
869 png_infop write_info_ptr = NULL;
870 png_infop write_end_info_ptr = NULL;
874 png_uint_32 width, height;
875 volatile int num_passes;
877 int bit_depth, color_type;
878 #ifdef PNG_APNG_SUPPORTED
879 png_uint_32 num_frames;
880 png_uint_32 num_plays;
884 error_parameters.file_name = inname;
886 if ((fpin = fopen(inname, "rb")) == NULL)
888 fprintf(STDERR, "Could not find input file %s\n", inname);
892 if ((fpout = fopen(outname, "wb")) == NULL)
894 fprintf(STDERR, "Could not open output file %s\n", outname);
899 pngtest_debug("Allocating read and write structures");
900 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
902 png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL,
903 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
906 png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
908 png_set_error_fn(read_ptr, &error_parameters, pngtest_error,
911 #ifdef PNG_WRITE_SUPPORTED
912 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
914 png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL,
915 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
918 png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
920 png_set_error_fn(write_ptr, &error_parameters, pngtest_error,
923 pngtest_debug("Allocating read_info, write_info and end_info structures");
924 read_info_ptr = png_create_info_struct(read_ptr);
925 end_info_ptr = png_create_info_struct(read_ptr);
926 #ifdef PNG_WRITE_SUPPORTED
927 write_info_ptr = png_create_info_struct(write_ptr);
928 write_end_info_ptr = png_create_info_struct(write_ptr);
931 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
932 init_callback_info(read_info_ptr);
933 png_set_read_user_chunk_fn(read_ptr, &user_chunk_data,
934 read_user_chunk_callback);
937 #ifdef PNG_SETJMP_SUPPORTED
938 pngtest_debug("Setting jmpbuf for read struct");
939 if (setjmp(png_jmpbuf(read_ptr)))
941 fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
942 png_free(read_ptr, row_buf);
945 fprintf(STDERR, " destroy read structs\n");
946 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
947 #ifdef PNG_WRITE_SUPPORTED
949 fprintf(STDERR, " destroy write structs\n");
950 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
951 png_destroy_write_struct(&write_ptr, &write_info_ptr);
958 #ifdef PNG_WRITE_SUPPORTED
959 pngtest_debug("Setting jmpbuf for write struct");
961 if (setjmp(png_jmpbuf(write_ptr)))
963 fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
964 png_free(read_ptr, row_buf);
967 fprintf(STDERR, " destroying read structs\n");
968 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
970 fprintf(STDERR, " destroying write structs\n");
971 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
972 png_destroy_write_struct(&write_ptr, &write_info_ptr);
980 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
983 /* Treat png_benign_error() as errors on read */
984 png_set_benign_errors(read_ptr, 0);
986 # ifdef PNG_WRITE_SUPPORTED
987 /* Treat them as errors on write */
988 png_set_benign_errors(write_ptr, 0);
991 /* if strict is not set, then app warnings and errors are treated as
992 * warnings in release builds, but not in unstable builds; this can be
993 * changed with '--relaxed'.
997 else if (relaxed != 0)
999 /* Allow application (pngtest) errors and warnings to pass */
1000 png_set_benign_errors(read_ptr, 1);
1002 /* Turn off CRC checking while reading */
1003 png_set_crc_action(read_ptr, PNG_CRC_QUIET_USE, PNG_CRC_QUIET_USE);
1005 #ifdef PNG_IGNORE_ADLER32
1006 /* Turn off ADLER32 checking while reading */
1007 png_set_option(read_ptr, PNG_IGNORE_ADLER32, PNG_OPTION_ON);
1010 # ifdef PNG_WRITE_SUPPORTED
1011 png_set_benign_errors(write_ptr, 1);
1015 #endif /* BENIGN_ERRORS */
1017 pngtest_debug("Initializing input and output streams");
1018 #ifdef PNG_STDIO_SUPPORTED
1019 png_init_io(read_ptr, fpin);
1020 # ifdef PNG_WRITE_SUPPORTED
1021 png_init_io(write_ptr, fpout);
1024 png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
1025 # ifdef PNG_WRITE_SUPPORTED
1026 png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data,
1027 # ifdef PNG_WRITE_FLUSH_SUPPORTED
1035 if (status_dots_requested == 1)
1037 #ifdef PNG_WRITE_SUPPORTED
1038 png_set_write_status_fn(write_ptr, write_row_callback);
1040 png_set_read_status_fn(read_ptr, read_row_callback);
1045 #ifdef PNG_WRITE_SUPPORTED
1046 png_set_write_status_fn(write_ptr, NULL);
1048 png_set_read_status_fn(read_ptr, NULL);
1051 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1052 png_set_read_user_transform_fn(read_ptr, read_user_callback);
1054 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1056 png_set_write_user_transform_fn(write_ptr, count_zero_samples);
1059 #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
1060 /* Preserve all the unknown chunks, if possible. If this is disabled then,
1061 * even if the png_{get,set}_unknown_chunks stuff is enabled, we can't use
1062 * libpng to *save* the unknown chunks on read (because we can't switch the
1065 * Notice that if SET_UNKNOWN_CHUNKS is *not* supported read will discard all
1066 * unknown chunks and write will write them all.
1068 #ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
1069 png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS,
1072 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1073 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS,
1078 pngtest_debug("Reading info struct");
1079 png_read_info(read_ptr, read_info_ptr);
1081 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1082 /* This is a bit of a hack; there is no obvious way in the callback function
1083 * to determine that the chunks before the first IDAT have been read, so
1084 * remove the info_ptr (which is only used to determine position relative to
1085 * PLTE) here to indicate that we are after the IDAT.
1087 user_chunk_data.info_ptr = NULL;
1090 pngtest_debug("Transferring info struct");
1092 int interlace_type, compression_type, filter_type;
1094 if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth,
1095 &color_type, &interlace_type, &compression_type, &filter_type) != 0)
1097 png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
1098 color_type, interlace_type, compression_type, filter_type);
1099 /* num_passes may not be available below if interlace support is not
1100 * provided by libpng for both read and write.
1102 switch (interlace_type)
1104 case PNG_INTERLACE_NONE:
1108 case PNG_INTERLACE_ADAM7:
1113 png_error(read_ptr, "invalid interlace type");
1119 png_error(read_ptr, "png_get_IHDR failed");
1121 #ifdef PNG_FIXED_POINT_SUPPORTED
1122 #ifdef PNG_cHRM_SUPPORTED
1124 png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1127 if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y,
1128 &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y) != 0)
1130 png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
1131 red_y, green_x, green_y, blue_x, blue_y);
1135 #ifdef PNG_gAMA_SUPPORTED
1137 png_fixed_point gamma;
1139 if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma) != 0)
1140 png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
1143 #else /* Use floating point versions */
1144 #ifdef PNG_FLOATING_POINT_SUPPORTED
1145 #ifdef PNG_cHRM_SUPPORTED
1147 double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1150 if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
1151 &red_y, &green_x, &green_y, &blue_x, &blue_y) != 0)
1153 png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x,
1154 red_y, green_x, green_y, blue_x, blue_y);
1158 #ifdef PNG_gAMA_SUPPORTED
1162 if (png_get_gAMA(read_ptr, read_info_ptr, &gamma) != 0)
1163 png_set_gAMA(write_ptr, write_info_ptr, gamma);
1166 #endif /* Floating point */
1167 #endif /* Fixed point */
1168 #ifdef PNG_iCCP_SUPPORTED
1172 png_uint_32 proflen;
1173 int compression_type;
1175 if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
1176 &profile, &proflen) != 0)
1178 png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
1183 #ifdef PNG_sRGB_SUPPORTED
1187 if (png_get_sRGB(read_ptr, read_info_ptr, &intent) != 0)
1188 png_set_sRGB(write_ptr, write_info_ptr, intent);
1195 if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette) != 0)
1196 png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
1198 #ifdef PNG_bKGD_SUPPORTED
1200 png_color_16p background;
1202 if (png_get_bKGD(read_ptr, read_info_ptr, &background) != 0)
1204 png_set_bKGD(write_ptr, write_info_ptr, background);
1208 #ifdef PNG_READ_eXIf_SUPPORTED
1210 png_bytep exif=NULL;
1211 png_uint_32 exif_length;
1213 if (png_get_eXIf_1(read_ptr, read_info_ptr, &exif_length, &exif) != 0)
1215 if (exif_length > 1)
1216 fprintf(STDERR," eXIf type %c%c, %lu bytes\n",exif[0],exif[1],
1217 (unsigned long)exif_length);
1218 # ifdef PNG_WRITE_eXIf_SUPPORTED
1219 png_set_eXIf_1(write_ptr, write_info_ptr, exif_length, exif);
1224 #ifdef PNG_hIST_SUPPORTED
1228 if (png_get_hIST(read_ptr, read_info_ptr, &hist) != 0)
1229 png_set_hIST(write_ptr, write_info_ptr, hist);
1232 #ifdef PNG_oFFs_SUPPORTED
1234 png_int_32 offset_x, offset_y;
1237 if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
1240 png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
1244 #ifdef PNG_pCAL_SUPPORTED
1246 png_charp purpose, units;
1251 if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type,
1252 &nparams, &units, ¶ms) != 0)
1254 png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type,
1255 nparams, units, params);
1259 #ifdef PNG_pHYs_SUPPORTED
1261 png_uint_32 res_x, res_y;
1264 if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y,
1266 png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
1269 #ifdef PNG_sBIT_SUPPORTED
1271 png_color_8p sig_bit;
1273 if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit) != 0)
1274 png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
1277 #ifdef PNG_sCAL_SUPPORTED
1278 #if defined(PNG_FLOATING_POINT_SUPPORTED) && \
1279 defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
1282 double scal_width, scal_height;
1284 if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
1287 png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);
1291 #ifdef PNG_FIXED_POINT_SUPPORTED
1294 png_charp scal_width, scal_height;
1296 if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
1299 png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width,
1307 #ifdef PNG_sPLT_SUPPORTED
1309 png_sPLT_tp entries;
1311 int num_entries = (int) png_get_sPLT(read_ptr, read_info_ptr, &entries);
1314 png_set_sPLT(write_ptr, write_info_ptr, entries, num_entries);
1319 #ifdef PNG_TEXT_SUPPORTED
1324 if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
1326 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1328 pngtest_check_text_support(read_ptr, text_ptr, num_text);
1334 fprintf(STDERR,"\n");
1335 for (i=0; i<num_text; i++)
1337 fprintf(STDERR," Text compression[%d]=%d\n",
1338 i, text_ptr[i].compression);
1342 png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
1346 #ifdef PNG_tIME_SUPPORTED
1350 if (png_get_tIME(read_ptr, read_info_ptr, &mod_time) != 0)
1352 png_set_tIME(write_ptr, write_info_ptr, mod_time);
1353 #ifdef PNG_TIME_RFC1123_SUPPORTED
1354 if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0)
1355 tIME_string[(sizeof tIME_string) - 1] = '\0';
1359 strncpy(tIME_string, "*** invalid time ***", (sizeof tIME_string));
1360 tIME_string[(sizeof tIME_string) - 1] = '\0';
1363 tIME_chunk_present++;
1364 #endif /* TIME_RFC1123 */
1368 #ifdef PNG_tRNS_SUPPORTED
1370 png_bytep trans_alpha;
1372 png_color_16p trans_color;
1374 if (png_get_tRNS(read_ptr, read_info_ptr, &trans_alpha, &num_trans,
1377 int sample_max = (1 << bit_depth);
1378 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1379 if (!((color_type == PNG_COLOR_TYPE_GRAY &&
1380 (int)trans_color->gray > sample_max) ||
1381 (color_type == PNG_COLOR_TYPE_RGB &&
1382 ((int)trans_color->red > sample_max ||
1383 (int)trans_color->green > sample_max ||
1384 (int)trans_color->blue > sample_max))))
1385 png_set_tRNS(write_ptr, write_info_ptr, trans_alpha, num_trans,
1391 #ifdef PNG_APNG_SUPPORTED
1392 if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_acTL))
1394 if (png_get_acTL(read_ptr, read_info_ptr, &num_frames, &num_plays))
1397 pngtest_debug2("Handling acTL chunks (frames %ld, plays %ld)",
1398 num_frames, num_plays);
1399 png_set_acTL(write_ptr, write_info_ptr, num_frames, num_plays);
1400 is_hidden = png_get_first_frame_is_hidden(read_ptr, read_info_ptr);
1401 png_set_first_frame_is_hidden(write_ptr, write_info_ptr, is_hidden);
1406 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1408 png_unknown_chunkp unknowns;
1409 int num_unknowns = png_get_unknown_chunks(read_ptr, read_info_ptr,
1412 if (num_unknowns != 0)
1414 png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
1416 #if PNG_LIBPNG_VER < 10600
1417 /* Copy the locations from the read_info_ptr. The automatically
1418 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1419 * because they are reset from the write pointer (removed in 1.6.0).
1423 for (i = 0; i < num_unknowns; i++)
1424 png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
1425 unknowns[i].location);
1432 #ifdef PNG_WRITE_SUPPORTED
1433 pngtest_debug("Writing info struct");
1435 /* Write the info in two steps so that if we write the 'unknown' chunks here
1436 * they go to the correct place.
1438 png_write_info_before_PLTE(write_ptr, write_info_ptr);
1440 write_chunks(write_ptr, before_PLTE); /* before PLTE */
1442 png_write_info(write_ptr, write_info_ptr);
1444 write_chunks(write_ptr, before_IDAT); /* after PLTE */
1446 png_write_info(write_ptr, write_end_info_ptr);
1448 write_chunks(write_ptr, after_IDAT); /* after IDAT */
1450 #ifdef PNG_COMPRESSION_COMPAT
1451 /* Test the 'compatibility' setting here, if it is available. */
1452 png_set_compression(write_ptr, PNG_COMPRESSION_COMPAT);
1456 #ifdef SINGLE_ROWBUF_ALLOC
1457 pngtest_debug("Allocating row buffer...");
1458 row_buf = (png_bytep)png_malloc(read_ptr,
1459 png_get_rowbytes(read_ptr, read_info_ptr));
1461 pngtest_debug1("\t%p", row_buf);
1462 #endif /* SINGLE_ROWBUF_ALLOC */
1463 pngtest_debug("Writing row data");
1465 #if defined(PNG_READ_INTERLACING_SUPPORTED) &&\
1466 defined(PNG_WRITE_INTERLACING_SUPPORTED)
1467 /* Both must be defined for libpng to be able to handle the interlace,
1468 * otherwise it gets handled below by simply reading and writing the passes
1471 if (png_set_interlace_handling(read_ptr) != num_passes)
1472 png_error(write_ptr,
1473 "png_set_interlace_handling(read): wrong pass count ");
1474 if (png_set_interlace_handling(write_ptr) != num_passes)
1475 png_error(write_ptr,
1476 "png_set_interlace_handling(write): wrong pass count ");
1477 #else /* png_set_interlace_handling not called on either read or write */
1478 # define calc_pass_height
1479 #endif /* not using libpng interlace handling */
1481 #ifdef PNGTEST_TIMING
1482 t_stop = (float)clock();
1483 t_misc += (t_stop - t_start);
1486 #ifdef PNG_APNG_SUPPORTED
1487 if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_acTL))
1490 for (frame = 0; frame < num_frames; frame++)
1492 png_uint_32 frame_width;
1493 png_uint_32 frame_height;
1494 png_uint_32 x_offset;
1495 png_uint_32 y_offset;
1496 png_uint_16 delay_num;
1497 png_uint_16 delay_den;
1498 png_byte dispose_op;
1500 png_read_frame_head(read_ptr, read_info_ptr);
1501 if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_fcTL))
1503 png_get_next_frame_fcTL(read_ptr, read_info_ptr,
1504 &frame_width, &frame_height,
1505 &x_offset, &y_offset,
1506 &delay_num, &delay_den,
1507 &dispose_op, &blend_op);
1511 frame_width = width;
1512 frame_height = height;
1517 dispose_op = PNG_DISPOSE_OP_NONE;
1518 blend_op = PNG_BLEND_OP_SOURCE;
1520 #ifdef PNG_WRITE_APNG_SUPPORTED
1521 png_write_frame_head(write_ptr, write_info_ptr, (png_bytepp)&row_buf,
1522 frame_width, frame_height,
1524 delay_num, delay_den,
1525 dispose_op, blend_op);
1527 for (pass = 0; pass < num_passes; pass++)
1529 # ifdef calc_pass_height
1530 png_uint_32 pass_height;
1532 if (num_passes == 7) /* interlaced */
1534 if (PNG_PASS_COLS(frame_width, pass) > 0)
1535 pass_height = PNG_PASS_ROWS(frame_height, pass);
1541 else /* not interlaced */
1542 pass_height = frame_height;
1544 # define pass_height frame_height
1547 pngtest_debug1("Writing row data for pass %d", pass);
1548 for (y = 0; y < pass_height; y++)
1550 #ifndef SINGLE_ROWBUF_ALLOC
1551 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y);
1553 row_buf = (png_bytep)png_malloc(read_ptr,
1554 png_get_rowbytes(read_ptr, read_info_ptr));
1556 pngtest_debug2("\t0x%08lx (%lu bytes)", (unsigned long)row_buf,
1557 (unsigned long)png_get_rowbytes(read_ptr, read_info_ptr));
1559 #endif /* !SINGLE_ROWBUF_ALLOC */
1560 png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
1562 #ifdef PNG_WRITE_SUPPORTED
1563 #ifdef PNGTEST_TIMING
1564 t_stop = (float)clock();
1565 t_decode += (t_stop - t_start);
1568 png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1569 #ifdef PNGTEST_TIMING
1570 t_stop = (float)clock();
1571 t_encode += (t_stop - t_start);
1574 #endif /* PNG_WRITE_SUPPORTED */
1576 #ifndef SINGLE_ROWBUF_ALLOC
1577 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y);
1578 png_free(read_ptr, row_buf);
1580 #endif /* !SINGLE_ROWBUF_ALLOC */
1583 #ifdef PNG_WRITE_APNG_SUPPORTED
1584 png_write_frame_tail(write_ptr, write_info_ptr);
1590 for (pass = 0; pass < num_passes; pass++)
1592 # ifdef calc_pass_height
1593 png_uint_32 pass_height;
1595 if (num_passes == 7) /* interlaced */
1597 if (PNG_PASS_COLS(width, pass) > 0)
1598 pass_height = PNG_PASS_ROWS(height, pass);
1604 else /* not interlaced */
1605 pass_height = height;
1607 # define pass_height height
1610 pngtest_debug1("Writing row data for pass %d", pass);
1611 for (y = 0; y < pass_height; y++)
1613 #ifndef SINGLE_ROWBUF_ALLOC
1614 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y);
1616 row_buf = (png_bytep)png_malloc(read_ptr,
1617 png_get_rowbytes(read_ptr, read_info_ptr));
1619 pngtest_debug2("\t%p (%lu bytes)", row_buf,
1620 (unsigned long)png_get_rowbytes(read_ptr, read_info_ptr));
1622 #endif /* !SINGLE_ROWBUF_ALLOC */
1623 png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
1625 #ifdef PNG_WRITE_SUPPORTED
1626 #ifdef PNGTEST_TIMING
1627 t_stop = (float)clock();
1628 t_decode += (t_stop - t_start);
1631 png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1632 #ifdef PNGTEST_TIMING
1633 t_stop = (float)clock();
1634 t_encode += (t_stop - t_start);
1639 #ifndef SINGLE_ROWBUF_ALLOC
1640 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y);
1641 png_free(read_ptr, row_buf);
1643 #endif /* !SINGLE_ROWBUF_ALLOC */
1647 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
1648 # ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1649 png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
1651 # ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1652 png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
1656 pngtest_debug("Reading and writing end_info data");
1658 png_read_end(read_ptr, end_info_ptr);
1659 #ifdef PNG_TEXT_SUPPORTED
1664 if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
1666 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1668 pngtest_check_text_support(read_ptr, text_ptr, num_text);
1674 fprintf(STDERR,"\n");
1675 for (i=0; i<num_text; i++)
1677 fprintf(STDERR," Text compression[%d]=%d\n",
1678 i, text_ptr[i].compression);
1682 png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
1686 #ifdef PNG_READ_eXIf_SUPPORTED
1688 png_bytep exif=NULL;
1689 png_uint_32 exif_length;
1691 if (png_get_eXIf_1(read_ptr, end_info_ptr, &exif_length, &exif) != 0)
1693 if (exif_length > 1)
1694 fprintf(STDERR," eXIf type %c%c, %lu bytes\n",exif[0],exif[1],
1695 (unsigned long)exif_length);
1696 # ifdef PNG_WRITE_eXIf_SUPPORTED
1697 png_set_eXIf_1(write_ptr, write_end_info_ptr, exif_length, exif);
1702 #ifdef PNG_tIME_SUPPORTED
1706 if (png_get_tIME(read_ptr, end_info_ptr, &mod_time) != 0)
1708 png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
1709 #ifdef PNG_TIME_RFC1123_SUPPORTED
1710 if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0)
1711 tIME_string[(sizeof tIME_string) - 1] = '\0';
1715 strncpy(tIME_string, "*** invalid time ***", sizeof tIME_string);
1716 tIME_string[(sizeof tIME_string)-1] = '\0';
1719 tIME_chunk_present++;
1720 #endif /* TIME_RFC1123 */
1724 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1726 png_unknown_chunkp unknowns;
1727 int num_unknowns = png_get_unknown_chunks(read_ptr, end_info_ptr,
1730 if (num_unknowns != 0)
1732 png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
1734 #if PNG_LIBPNG_VER < 10600
1735 /* Copy the locations from the read_info_ptr. The automatically
1736 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1737 * because they are reset from the write pointer (removed in 1.6.0).
1741 for (i = 0; i < num_unknowns; i++)
1742 png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
1743 unknowns[i].location);
1750 #ifdef PNG_WRITE_SUPPORTED
1751 #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
1752 /* Normally one would use Z_DEFAULT_STRATEGY for text compression.
1753 * This is here just to make pngtest replicate the results from libpng
1754 * versions prior to 1.5.4, and to test this new API.
1756 png_set_text_compression_strategy(write_ptr, Z_FILTERED);
1759 /* When the unknown vpAg/sTER chunks are written by pngtest the only way to
1760 * do it is to write them *before* calling png_write_end. When unknown
1761 * chunks are written by libpng, however, they are written just before IEND.
1762 * There seems to be no way round this, however vpAg/sTER are not expected
1765 write_chunks(write_ptr, after_IDAT);
1767 png_write_end(write_ptr, write_end_info_ptr);
1770 #ifdef PNG_EASY_ACCESS_SUPPORTED
1773 png_uint_32 iwidth, iheight;
1774 iwidth = png_get_image_width(write_ptr, write_info_ptr);
1775 iheight = png_get_image_height(write_ptr, write_info_ptr);
1776 fprintf(STDERR, "\n Image width = %lu, height = %lu\n",
1777 (unsigned long)iwidth, (unsigned long)iheight);
1781 pngtest_debug("Destroying data structs");
1782 #ifdef SINGLE_ROWBUF_ALLOC
1783 pngtest_debug("destroying row_buf for read_ptr");
1784 png_free(read_ptr, row_buf);
1786 #endif /* SINGLE_ROWBUF_ALLOC */
1787 pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");
1788 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
1789 #ifdef PNG_WRITE_SUPPORTED
1790 pngtest_debug("destroying write_end_info_ptr");
1791 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
1792 pngtest_debug("destroying write_ptr, write_info_ptr");
1793 png_destroy_write_struct(&write_ptr, &write_info_ptr);
1795 pngtest_debug("Destruction complete.");
1800 /* Summarize any warnings or errors and in 'strict' mode fail the test.
1801 * Unsupported chunks can result in warnings, in that case ignore the strict
1802 * setting, otherwise fail the test on warnings as well as errors.
1804 if (error_count > 0)
1806 /* We don't really expect to get here because of the setjmp handling
1807 * above, but this is safe.
1809 fprintf(STDERR, "\n %s: %d libpng errors found (%d warnings)",
1810 inname, error_count, warning_count);
1816 # ifdef PNG_WRITE_SUPPORTED
1817 /* If there is no write support nothing was written! */
1818 else if (unsupported_chunks > 0)
1820 fprintf(STDERR, "\n %s: unsupported chunks (%d)%s",
1821 inname, unsupported_chunks, strict ? ": IGNORED --strict!" : "");
1825 else if (warning_count > 0)
1827 fprintf(STDERR, "\n %s: %d libpng warnings found",
1828 inname, warning_count);
1834 pngtest_debug("Opening files for comparison");
1835 if ((fpin = fopen(inname, "rb")) == NULL)
1837 fprintf(STDERR, "Could not find file %s\n", inname);
1841 if ((fpout = fopen(outname, "rb")) == NULL)
1843 fprintf(STDERR, "Could not find file %s\n", outname);
1848 #if defined (PNG_WRITE_SUPPORTED) /* else nothing was written */ &&\
1849 defined (PNG_WRITE_FILTER_SUPPORTED)
1850 if (interlace_preserved != 0) /* else the files will be changed */
1854 static int wrote_question = 0;
1855 size_t num_in, num_out;
1856 char inbuf[256], outbuf[256];
1858 num_in = fread(inbuf, 1, sizeof inbuf, fpin);
1859 num_out = fread(outbuf, 1, sizeof outbuf, fpout);
1861 if (num_in != num_out)
1863 fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
1866 if (wrote_question == 0 && unsupported_chunks == 0)
1869 " Was %s written with the same maximum IDAT"
1870 " chunk size (%d bytes),",
1871 inname, PNG_ZBUF_SIZE);
1873 "\n filtering heuristic (libpng default), compression");
1875 " level (zlib default),\n and zlib version (%s)?\n\n",
1883 if (strict != 0 && unsupported_chunks == 0)
1893 if (memcmp(inbuf, outbuf, num_in))
1895 fprintf(STDERR, "\nFiles %s and %s are different\n", inname,
1898 if (wrote_question == 0 && unsupported_chunks == 0)
1901 " Was %s written with the same maximum"
1902 " IDAT chunk size (%d bytes),",
1903 inname, PNG_ZBUF_SIZE);
1905 "\n filtering heuristic (libpng default), compression");
1907 " level (zlib default),\n and zlib version (%s)?\n\n",
1915 /* NOTE: the unsupported_chunks escape is permitted here because
1916 * unsupported text chunk compression will result in the compression
1917 * mode being changed (to NONE) yet, in the test case, the result
1918 * can be exactly the same size!
1920 if (strict != 0 && unsupported_chunks == 0)
1928 #endif /* WRITE && WRITE_FILTER */
1936 /* Input and output filenames */
1938 static const char *inname = "pngtest/png";
1939 static const char *outname = "pngout/png";
1941 static const char *inname = "pngtest.png";
1942 static const char *outname = "pngout.png";
1946 main(int argc, char *argv[])
1951 png_structp dummy_ptr;
1953 fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
1954 fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION);
1955 fprintf(STDERR, "%s", png_get_copyright(NULL));
1956 /* Show the version of libpng used in building the library */
1957 fprintf(STDERR, " library (%lu):%s",
1958 (unsigned long)png_access_version_number(),
1959 png_get_header_version(NULL));
1961 /* Show the version of libpng used in building the application */
1962 fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
1963 PNG_HEADER_VERSION_STRING);
1965 /* Do some consistency checking on the memory allocation settings, I'm
1966 * not sure this matters, but it is nice to know, the first of these
1967 * tests should be impossible because of the way the macros are set
1970 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1971 fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
1973 /* I think the following can happen. */
1974 #if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1975 fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n");
1978 if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING))
1981 "Warning: versions are different between png.h and png.c\n");
1982 fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING);
1983 fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver);
1989 if (strcmp(argv[1], "-m") == 0)
1992 status_dots_requested = 0;
1995 else if (strcmp(argv[1], "-mv") == 0 ||
1996 strcmp(argv[1], "-vm") == 0 )
2000 status_dots_requested = 1;
2003 else if (strcmp(argv[1], "-v") == 0)
2006 status_dots_requested = 1;
2010 else if (strcmp(argv[1], "--strict") == 0)
2012 status_dots_requested = 0;
2020 else if (strcmp(argv[1], "--relaxed") == 0)
2022 status_dots_requested = 0;
2029 else if (strcmp(argv[1], "--xfail") == 0)
2031 status_dots_requested = 0;
2043 status_dots_requested = 0;
2047 if (multiple == 0 && argc == 3 + verbose)
2048 outname = argv[2 + verbose];
2050 if ((multiple == 0 && argc > 3 + verbose) ||
2051 (multiple != 0 && argc < 2))
2054 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
2057 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
2059 " with -m %s is used as a temporary file\n", outname);
2066 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2067 int allocation_now = current_allocation;
2069 for (i=2; i<argc; ++i)
2072 fprintf(STDERR, "\n Testing %s:", argv[i]);
2074 fprintf(STDERR, "\n");
2076 kerror = test_one_file(argv[i], outname);
2079 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
2080 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
2081 (unsigned long)zero_samples);
2083 fprintf(STDERR, " PASS\n");
2085 #ifdef PNG_TIME_RFC1123_SUPPORTED
2086 if (tIME_chunk_present != 0)
2087 fprintf(STDERR, " tIME = %s\n", tIME_string);
2089 tIME_chunk_present = 0;
2090 #endif /* TIME_RFC1123 */
2096 fprintf(STDERR, " XFAIL\n");
2099 fprintf(STDERR, " FAIL\n");
2103 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2104 if (allocation_now != current_allocation)
2105 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
2106 current_allocation - allocation_now);
2108 if (current_allocation != 0)
2110 memory_infop pinfo = pinformation;
2112 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
2113 current_allocation);
2115 while (pinfo != NULL)
2117 fprintf(STDERR, " %lu bytes at %p\n",
2118 (unsigned long)pinfo->size,
2120 pinfo = pinfo->next;
2125 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2126 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
2127 current_allocation);
2128 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
2129 maximum_allocation);
2130 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
2132 fprintf(STDERR, " Number of allocations: %10d\n",
2140 for (i = 0; i<3; ++i)
2143 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2144 int allocation_now = current_allocation;
2147 status_dots_requested = 1;
2149 else if (verbose == 0)
2150 status_dots_requested = 0;
2152 if (i == 0 || verbose == 1 || ierror != 0)
2154 fprintf(STDERR, "\n Testing %s:", inname);
2156 fprintf(STDERR, "\n");
2160 kerror = test_one_file(inname, outname);
2164 if (verbose == 1 || i == 2)
2166 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
2167 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
2168 (unsigned long)zero_samples);
2170 fprintf(STDERR, " PASS\n");
2172 #ifdef PNG_TIME_RFC1123_SUPPORTED
2173 if (tIME_chunk_present != 0)
2174 fprintf(STDERR, " tIME = %s\n", tIME_string);
2175 #endif /* TIME_RFC1123 */
2181 if (verbose == 0 && i != 2)
2183 fprintf(STDERR, "\n Testing %s:", inname);
2185 fprintf(STDERR, "\n");
2190 fprintf(STDERR, " XFAIL\n");
2193 fprintf(STDERR, " FAIL\n");
2197 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2198 if (allocation_now != current_allocation)
2199 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
2200 current_allocation - allocation_now);
2202 if (current_allocation != 0)
2204 memory_infop pinfo = pinformation;
2206 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
2207 current_allocation);
2209 while (pinfo != NULL)
2211 fprintf(STDERR, " %lu bytes at %p\n",
2212 (unsigned long)pinfo->size, pinfo->pointer);
2213 pinfo = pinfo->next;
2218 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2219 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
2220 current_allocation);
2221 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
2222 maximum_allocation);
2223 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
2225 fprintf(STDERR, " Number of allocations: %10d\n",
2230 #ifdef PNGTEST_TIMING
2231 t_stop = (float)clock();
2232 t_misc += (t_stop - t_start);
2234 fprintf(STDERR, " CPU time used = %.3f seconds",
2235 (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
2236 fprintf(STDERR, " (decoding %.3f,\n",
2237 t_decode/(float)CLOCKS_PER_SEC);
2238 fprintf(STDERR, " encoding %.3f ,",
2239 t_encode/(float)CLOCKS_PER_SEC);
2240 fprintf(STDERR, " other %.3f seconds)\n\n",
2241 t_misc/(float)CLOCKS_PER_SEC);
2245 fprintf(STDERR, " libpng passes test\n");
2248 fprintf(STDERR, " libpng FAILS test\n");
2250 dummy_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
2251 fprintf(STDERR, " Default limits:\n");
2252 fprintf(STDERR, " width_max = %lu\n",
2253 (unsigned long) png_get_user_width_max(dummy_ptr));
2254 fprintf(STDERR, " height_max = %lu\n",
2255 (unsigned long) png_get_user_height_max(dummy_ptr));
2256 if (png_get_chunk_cache_max(dummy_ptr) == 0)
2257 fprintf(STDERR, " cache_max = unlimited\n");
2259 fprintf(STDERR, " cache_max = %lu\n",
2260 (unsigned long) png_get_chunk_cache_max(dummy_ptr));
2261 if (png_get_chunk_malloc_max(dummy_ptr) == 0)
2262 fprintf(STDERR, " malloc_max = unlimited\n");
2264 fprintf(STDERR, " malloc_max = %lu\n",
2265 (unsigned long) png_get_chunk_malloc_max(dummy_ptr));
2266 png_destroy_read_struct(&dummy_ptr, NULL, NULL);
2268 return (int)(ierror != 0);
2275 " test ignored because libpng was not built with read support\n");
2276 /* And skip this test */
2277 return PNG_LIBPNG_VER < 10600 ? 0 : 77;
2281 /* Generate a compiler error if there is an old png.h in the search path. */
2282 typedef png_libpng_version_1_6_40 Your_png_h_is_not_version_1_6_40;