/* 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
+ * Last changed in libpng 1.6.32 [August 24, 2017]
+ * 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,
return PNG_CHUNK_ANCILLARY(PNG_U32(name[0], name[1], name[2], name[3]));
}
-#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
+#ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
static int
ancillaryb(const png_byte *name)
{
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;
/* However if there is no support to store unknown chunks don't ask libpng to
* do it; there will be an png_error.
*/
-# ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
+# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
return discard;
# else
return 1; /*handled; discard*/
}
#endif /* READ_USER_CHUNKS_SUPPORTED */
-#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
+#ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
static png_uint_32
get_unknown(display *d, png_infop info_ptr, int after_IDAT)
{
++(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*/,
* in this case, so we just check the arguments! This could
* be improved in the future by using the read callback.
*/
- png_byte name[5];
-
- memcpy(name, chunk_info[chunk].name, 5);
- png_set_keep_unknown_chunks(d->png_ptr, option, name, 1);
- chunk_info[chunk].keep = option;
+# if PNG_LIBPNG_VER >= 10700 &&\
+ !defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED)
+ if (option < PNG_HANDLE_CHUNK_IF_SAFE)
+# endif /* 1.7+ SAVE_UNKNOWN_CHUNKS */
+ {
+ png_byte name[5];
+
+ memcpy(name, chunk_info[chunk].name, 5);
+ png_set_keep_unknown_chunks(d->png_ptr, option, name, 1);
+ chunk_info[chunk].keep = option;
+ }
continue;
}
case 7: /* default */
if (memcmp(argv[i], "default", 7) == 0)
{
- png_set_keep_unknown_chunks(d->png_ptr, option, NULL, 0);
+# if PNG_LIBPNG_VER >= 10700 &&\
+ !defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED)
+ if (option < PNG_HANDLE_CHUNK_IF_SAFE)
+# endif /* 1.7+ SAVE_UNKNOWN_CHUNKS */
+ png_set_keep_unknown_chunks(d->png_ptr, option, NULL, 0);
+
d->keep = option;
continue;
}
case 3: /* all */
if (memcmp(argv[i], "all", 3) == 0)
{
- png_set_keep_unknown_chunks(d->png_ptr, option, NULL, -1);
+# if PNG_LIBPNG_VER >= 10700 &&\
+ !defined(PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED)
+ if (option < PNG_HANDLE_CHUNK_IF_SAFE)
+# endif /* 1.7+ SAVE_UNKNOWN_CHUNKS */
+ png_set_keep_unknown_chunks(d->png_ptr, option, NULL, -1);
+
d->keep = option;
for (chunk = 0; chunk < NINFO; ++chunk)
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
"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,
+ "sBIT=save", "sRGB=save", "eXIf=save", 0,
0/*end*/
};
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