/* pngunknown.c - test the read side unknown chunk handling
*
- * Last changed in libpng 1.6.10 [March 6, 2014]
- * Copyright (c) 2014 Glenn Randers-Pehrson
+ * Copyright (c) 2021 Cosmin Truta
+ * Copyright (c) 2015,2017 Glenn Randers-Pehrson
* Written by John Cunningham Bowler
*
* This code is released under the libpng license.
# include "../../png.h"
#endif
+/* 1.6.1 added support for the configure test harness, which uses 77 to indicate
+ * a skipped test, in earlier versions we need to succeed on a skipped test, so:
+ */
+#if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H)
+# define SKIP 77
+#else
+# define SKIP 0
+#endif
+
+
/* Since this program tests the ability to change the unknown chunk handling
* these must be defined:
*/
#if defined(PNG_SET_UNKNOWN_CHUNKS_SUPPORTED) &&\
+ defined(PNG_STDIO_SUPPORTED) &&\
defined(PNG_READ_SUPPORTED)
/* One of these must be defined to allow us to find out what happened. It is
defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED)
#if PNG_LIBPNG_VER < 10500
-/* This deliberately lacks the PNG_CONST. */
+/* This deliberately lacks the const. */
typedef png_byte *png_const_bytep;
/* This is copied from 1.5.1 png.h: */
#define PNG_WRITE_16BIT_SUPPORTED
#define PNG_READ_16BIT_SUPPORTED
-/* This comes from pnglibconf.h afer 1.5: */
+/* This comes from pnglibconf.h after 1.5: */
#define PNG_FP_1 100000
#define PNG_GAMMA_THRESHOLD_FIXED\
((png_fixed_point)(PNG_GAMMA_THRESHOLD * PNG_FP_1))
#define png_PLTE PNG_U32( 80, 76, 84, 69)
#define png_bKGD PNG_U32( 98, 75, 71, 68)
#define png_cHRM PNG_U32( 99, 72, 82, 77)
+#define png_eXIf PNG_U32(101, 88, 73, 102) /* registered July 2017 */
#define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */
#define png_gAMA PNG_U32(103, 65, 77, 65)
#define png_gIFg PNG_U32(103, 73, 70, 103)
1,
# endif
1, START, 0 },
+ { "eXIf", PNG_INFO_eXIf, png_eXIf,
+# ifdef PNG_READ_eXIf_SUPPORTED
+ 0,
+# else
+ 1,
+# endif
+ 1, END, 0 },
{ "gAMA", PNG_INFO_gAMA, png_gAMA,
# ifdef PNG_READ_gAMA_SUPPORTED
0,
{
int i = NINFO;
- while (--i >= 0) if (chunk_info[i].flag == flag) return i;
+ while (--i >= 0)
+ if (chunk_info[i].flag == flag)
+ return i;
fprintf(stderr, "pngunknown: internal error\n");
exit(4);
png_textp text;
png_uint_32 ntext = png_get_text(d->png_ptr, info_ptr, &text, NULL);
- while (ntext-- > 0) switch (text[ntext].compression)
+ while (ntext > 0) switch (text[--ntext].compression)
{
case -1:
flags |= PNG_INFO_tEXt;
case PNG_HANDLE_CHUNK_AS_DEFAULT:
case PNG_HANDLE_CHUNK_NEVER:
- discard = 1/*handled; discard*/;
+ discard = 1; /*handled; discard*/
break;
case PNG_HANDLE_CHUNK_IF_SAFE:
case PNG_HANDLE_CHUNK_ALWAYS:
- discard = 0/*not handled; keep*/;
+ discard = 0; /*not handled; keep*/
break;
}
/* Also store information about this chunk in the display, the relevant flag
* is set if the chunk is to be kept ('not handled'.)
*/
- if (chunk >= 0) if (!discard) /* stupidity to stop a GCC warning */
+ if (chunk >= 0)
{
- png_uint_32 flag = chunk_info[chunk].flag;
+ if (!discard) /* stupidity to stop a GCC warning */
+ {
+ png_uint_32 flag = chunk_info[chunk].flag;
- if (pc->location & PNG_AFTER_IDAT)
- d->after_IDAT |= flag;
+ if (pc->location & PNG_AFTER_IDAT)
+ d->after_IDAT |= flag;
- else
- d->before_IDAT |= flag;
+ else
+ d->before_IDAT |= flag;
+ }
}
/* However if there is no support to store unknown chunks don't ask libpng to
++(d->error_count);
break;
}
- /* FALL THROUGH (safe) */
+ /* FALLTHROUGH */ /* (safe) */
case PNG_HANDLE_CHUNK_ALWAYS:
break;
}
return flags;
}
-#else
+#else /* SAVE_UNKNOWN_CHUNKS */
static png_uint_32
get_unknown(display *d, png_infop info_ptr, int after_IDAT)
/* Otherwise this will return the cached values set by any user callback */
* a check to ensure the logic is correct.
*/
# error No store support and no user chunk support, this will not work
-# endif
-#endif
+# endif /* READ_USER_CHUNKS */
+#endif /* SAVE_UNKNOWN_CHUNKS */
static int
check(FILE *fp, int argc, const char **argv, png_uint_32p flags/*out*/,
{
png_uint_32 y;
- for (y=0; y<height; ++y) if (PNG_ROW_IN_INTERLACE_PASS(y, ipass))
- png_read_row(d->png_ptr, NULL, NULL);
+ for (y=0; y<height; ++y)
+ if (PNG_ROW_IN_INTERLACE_PASS(y, ipass))
+ png_read_row(d->png_ptr, NULL, NULL);
}
}
} /* interlaced */
def = check(fp, argc, argv, flags[1], d, set_callback);
+ /* If IDAT is being handled as unknown the image read is skipped and all the
+ * IDATs after the first end up in the end info struct, so in this case add
+ * IDAT to the list of unknowns. (Do this after 'check' above sets the
+ * chunk_info 'keep' fields.)
+ *
+ * Note that the flag setting has to be in the 'known' field to avoid
+ * triggering the consistency check below and the flag must only be set if
+ * there are multiple IDATs, so if the check above did find an unknown IDAT
+ * after IDAT.
+ */
+ if (chunk_info[0/*IDAT*/].keep != PNG_HANDLE_CHUNK_AS_DEFAULT &&
+ (flags[1][3] & PNG_INFO_IDAT) != 0)
+ flags[0][2] |= PNG_INFO_IDAT;
+
/* Chunks should either be known or unknown, never both and this should apply
* whether the chunk is before or after the IDAT (actually, the app can
* probably change this by swapping the handling after the image, but this
static const char *standard_tests[] =
{
- "discard", "default=discard", 0,
- "save", "default=save", 0,
- "if-safe", "default=if-safe", 0,
- "vpAg", "vpAg=if-safe", 0,
- "sTER", "sTER=if-safe", 0,
- "IDAT", "default=discard", "IDAT=save", 0,
- "sAPI", "bKGD=save", "cHRM=save", "gAMA=save", "all=discard", "iCCP=save",
- "sBIT=save", "sRGB=save", 0,
- 0/*end*/
+ "discard", "default=discard", NULL,
+ "save", "default=save", NULL,
+ "if-safe", "default=if-safe", NULL,
+ "vpAg", "vpAg=if-safe", NULL,
+ "sTER", "sTER=if-safe", NULL,
+ "IDAT", "default=discard", "IDAT=save", NULL,
+ "sAPI", "bKGD=save", "cHRM=save", "gAMA=save", "all=discard", "iCCP=save",
+ "sBIT=save", "sRGB=save", "eXIf=save", NULL,
+ NULL /*end*/
};
static PNG_NORETURN void
main(int argc, const char **argv)
{
FILE *fp;
- png_uint_32 default_flags[4/*valid,unknown{before,after}*/];
+ png_uint_32 default_flags[4]; /*valid,unknown{before,after}*/
int strict = 0, default_tests = 0;
const char *count_argv = "default=save";
const char *touch_file = NULL;
/* GCC BUG: if (default_tests && argc != 1) triggers some weird GCC argc
* optimization which causes warnings with -Wstrict-overflow!
*/
- else if (default_tests) if (argc != 1)
- usage(d.program, "extra arguments");
+ else if (default_tests)
+ if (argc != 1)
+ usage(d.program, "extra arguments");
/* The name of the test file is the last argument; remove it. */
d.file = argv[--argc];
const char *result;
int arg_count = 0;
- while (*next) ++next, ++arg_count;
+ while (*next != NULL)
+ {
+ ++next;
+ ++arg_count;
+ }
perform_one_test_safe(fp, arg_count, test, default_flags, &d,
this_test);
fprintf(stderr,
" test ignored: no support to find out about unknown chunks\n");
/* So the test is skipped: */
- return 77;
+ return SKIP;
}
#endif /* READ_USER_CHUNKS || SAVE_UNKNOWN_CHUNKS */
fprintf(stderr,
" test ignored: no support to modify unknown chunk handling\n");
/* So the test is skipped: */
- return 77;
+ return SKIP;
}
#endif /* SET_UNKNOWN_CHUNKS && READ*/
projects / platform / upstream / libpng.git / blobdiff