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[libpng16] Reverted the fix of byte order in png_do_read_filler() with 16-bit

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input that was made in version 1.6.17beta01, to preserve legacy
behavior even though it was incorrect.  Instead, added new API
png_set_filter_16() and png_set_add_alpha_16() that set a flag to
make png_do_read_filter() interpret the filler bytes properly.
This commit is contained in:
Glenn Randers-Pehrson
2015-09-23 22:08:04 -05:00
parent d6eb4b71ac
commit efe4e5d10d
13 changed files with 141 additions and 65 deletions
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18
png.h
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@@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library
*
* libpng version 1.6.19beta03, August 19, 2015
* libpng version 1.6.19beta03, September 24, 2015
*
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -12,7 +12,7 @@
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.6.19beta03, August 19, 2015: Glenn
* libpng versions 0.97, January 1998, through 1.6.19beta03, September 24, 2015: Glenn
* See also "Contributing Authors", below.
*
* Note about libpng version numbers:
@@ -251,7 +251,7 @@
*
* This code is released under the libpng license.
*
* libpng versions 1.0.7, July 1, 2000, through 1.6.19beta03, August 19, 2015, are
* libpng versions 1.0.7, July 1, 2000, through 1.6.19beta03, September 24, 2015, are
* Copyright (c) 2000-2002, 2004, 2006-2015 Glenn Randers-Pehrson, and are
* distributed according to the same disclaimer and license as libpng-1.0.6
* with the following individuals added to the list of Contributing Authors:
@@ -360,7 +360,7 @@
* Y2K compliance in libpng:
* =========================
*
* August 19, 2015
* September 24, 2015
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
@@ -430,7 +430,7 @@
/* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.6.19beta03"
#define PNG_HEADER_VERSION_STRING \
" libpng version 1.6.19beta03 - August 19, 2015\n"
" libpng version 1.6.19beta03 - September 24, 2015\n"
#define PNG_LIBPNG_VER_SONUM 16
#define PNG_LIBPNG_VER_DLLNUM 16
@@ -1396,12 +1396,18 @@ PNG_EXPORT(38, void, png_set_invert_alpha, (png_structrp png_ptr));
/* Add a filler byte to 8-bit Gray or 24-bit RGB images. */
PNG_EXPORT(39, void, png_set_filler, (png_structrp png_ptr, png_uint_32 filler,
int flags));
/* Add a filler byte to 8-bit or 16-bit Gray or 24-bit or 48-bit RGB images. */
PNG_EXPORT(245, void, png_set_filler_16, (png_structrp png_ptr,
png_uint_32 filler, int flags));
/* The values of the PNG_FILLER_ defines should NOT be changed */
# define PNG_FILLER_BEFORE 0
# define PNG_FILLER_AFTER 1
/* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */
PNG_EXPORT(40, void, png_set_add_alpha, (png_structrp png_ptr,
png_uint_32 filler, int flags));
/* Add an alpha byte to 8-bit or 16-bit Gray or 24-bit or 48-bit RGB images. */
PNG_EXPORT(246, void, png_set_add_alpha_16, (png_structrp png_ptr,
png_uint_32 filler, int flags));
#endif /* READ_FILLER || WRITE_FILLER */
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
@@ -3264,7 +3270,7 @@ PNG_EXPORT(244, int, png_set_option, (png_structrp png_ptr, int option,
* one to use is one more than this.)
*/
#ifdef PNG_EXPORT_LAST_ORDINAL
PNG_EXPORT_LAST_ORDINAL(244);
PNG_EXPORT_LAST_ORDINAL(246);
#endif
#ifdef __cplusplus