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[libpng16] Recognize known sRGB ICC profiles while reading; prefer writing the

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iCCP profile over writing the sRGB chunk, controlled by the
    PNG_sRGB_PROFILE_CHECKS option.
This commit is contained in:
John Bowler
2012-03-28 23:36:12 -05:00
committed by Glenn Randers-Pehrson
parent 23a30f8583
commit 921648a997
10 changed files with 347 additions and 160 deletions
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9
pngpriv.h
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@@ -1443,9 +1443,14 @@ PNG_INTERNAL_FUNCTION(int,png_icc_check_tag_table,(png_const_structrp png_ptr,
png_colorspacerp colorspace, png_const_charp name,
png_uint_32 profile_length,
png_const_bytep profile /* header plus whole tag table */), PNG_EMPTY);
PNG_INTERNAL_FUNCTION(void,png_icc_set_gAMA_and_cHRM,(
PNG_INTERNAL_FUNCTION(int,png_icc_set_gAMA_and_cHRM,(
png_const_structrp png_ptr, png_colorspacerp colorspace,
png_const_charp name, png_const_bytep profile, int preferred), PNG_EMPTY);
png_const_charp name, png_const_bytep profile, uLong adler, int preferred),
PNG_EMPTY);
/* 'adler' is the Adler32 checksum of the uncompressed profile data, it may
* be 0 to indicate that it is not available. It is used, if provided, as a
* fast check on the profile when checking to see if it is sRGB.
*/
#endif /* iCCP */
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED