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pngcp minimal configuration changes

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Corrections for the pngcp minimal configuration in libpng 1.7 and corrections to
the libpng 1.7 code to fix bugs revealed by the reduced configuration.

Signed-off-by: John Bowler <jbowler@acm.org>
This commit is contained in:
John Bowler
2016-07-01 22:39:13 -07:00
parent eaf7abfdc3
commit 6a574a84bd
8 changed files with 61 additions and 40 deletions
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20
pngtrans.c
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@@ -599,20 +599,24 @@ set_palette_max(png_structrp png_ptr, png_transformp tr, unsigned int max,
png_ptr->palette_index_check != PNG_PALETTE_CHECK_OFF)
# endif /* WRITE */
)
{
# ifdef PNG_READ_SUPPORTED
# ifdef PNG_WRITE_SUPPORTED
(png_ptr->read_struct ? png_chunk_benign_error : png_error)
# else /* !WRITE */
png_chunk_benign_error
# endif /* READ */
# else /* !READ */
png_error
if (png_ptr->read_struct)
# endif /* WRITE */
png_chunk_benign_error(png_ptr, "palette index too large");
# ifdef PNG_WRITE_SUPPORTED
else
# endif
# endif /* READ */
# ifdef PNG_WRITE_SUPPORTED
png_error(png_ptr, "palette index too large");
# endif /* WRITE */
(png_ptr, "palette index too large");
}
png_ptr->palette_index_check_issued = 1;
}
# endif
# endif /* CHECK_FOR_INVALID_INDEX */
# ifdef PNG_GET_PALETTE_MAX_SUPPORTED
png_ptr->palette_index_max = png_check_byte(png_ptr, max);
# endif