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[master] Change some instances of PNG_READ_UNKNOWN_CHUNKS_SUPPORTED

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to PNG_HANDLE_AS_UNKNOWN to make it possible to build a libpng that can
use the png_set_keep_unknown_chunks() mechanism to ignore unused chunks
without having to save unknown chunks.
This commit is contained in:
Glenn Randers-Pehrson 2009-06-15 20:50:00 -05:00
parent b278e91338
commit bbe589da44
7 changed files with 75 additions and 63 deletions
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18
ANNOUNCE
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@ -1,5 +1,5 @@
Libpng 1.2.38beta01 - June 5, 2009 Libpng 1.2.38beta01 - June 12, 2009
This is not intended to be a public release. It will be replaced This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version. within a few weeks by a public version or by another test version.
@ -69,20 +69,26 @@ version 1.2.37rc01 [May 27, 2009]
No changes. No changes.
versions 1.2.37 and 1.0.45 [June 4, 2009] versions 1.2.37 and 1.0.45 [June 4, 2009]
Reformatted several remaining "else statement;" and "if () statment;" into Reformatted several remaining "else statement;" and "if () statement;" into
two lines. two lines.
Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h Added "#define PNG_NO_WRITE_SWAP" to contrib/pngminim/encoder/pngusr.h
and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h and "define PNG_NO_READ_SWAP" to decoder/pngusr.h and preader/pngusr.h
Added sections about the git repository and our coding style to the Added sections about the git repository and our coding style to the
documentation (merged from libpng-1.4.0beta62) documentation (merged from libpng-1.4.0beta62)
Added a section about using png_get_io_ptr() in configure scripts to detect Added a section in the documentation about using png_get_io_ptr() in
the presence of libpng. configure scripts to detect the presence of libpng.
versions 1.2.38 [June 5, 2009] version 1.2.38beta01 [June 12, 2009]
Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR()
multiple times and to specify the sample order in the tRNS chunk,
because the ISO PNG specification has a typo in the tRNS table.
Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to
PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism
available for ignoring known chunks even when not saving unknown chunks.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit (subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement https://lists.sourceforge.net/lists/listinfo/png-mng-implement
to subscribe) or to glennrp at users.sourceforge.net to subscribe) or to glennrp at users.sourceforge.net

5
CHANGES
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@ -2403,10 +2403,13 @@ versions 1.2.37 and 1.0.45 [June 4, 2009]
Added a section to the libpng documentation about using png_get_io_ptr() Added a section to the libpng documentation about using png_get_io_ptr()
in configure scripts to detect the presence of libpng. in configure scripts to detect the presence of libpng.
versions 1.2.38 [June 8, 2009] versions 1.2.38beta01 [June 12, 2009]
Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR() Revised libpng*.txt and libpng.3 to mention calling png_set_IHDR()
multiple times and to specify the sample order in the tRNS chunk, multiple times and to specify the sample order in the tRNS chunk,
because the ISO PNG specification has a typo in the tRNS table. because the ISO PNG specification has a typo in the tRNS table.
Changed several PNG_UNKNOWN_CHUNK_SUPPORTED to
PNG_HANDLE_AS_UNKNOWN_SUPPORTED, to make the png_set_keep mechanism
available for ignoring known chunks even when not saving unknown chunks.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit (subscription required; visit

28
png.h
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@ -1,6 +1,6 @@
/* png.h - header file for PNG reference library /* png.h - header file for PNG reference library
* *
* libpng version 1.2.38beta01 - June 5, 2009 * libpng version 1.2.38beta01 - June 12, 2009
* Copyright (c) 1998-2009 Glenn Randers-Pehrson * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -8,7 +8,7 @@
* Authors and maintainers: * Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.2.38beta01 - June 5, 2009: Glenn * libpng versions 0.97, January 1998, through 1.2.38beta01 - June 12, 2009: Glenn
* See also "Contributing Authors", below. * See also "Contributing Authors", below.
* *
* Note about libpng version numbers: * Note about libpng version numbers:
@ -260,7 +260,7 @@
* If you modify libpng you may insert additional notices immediately following * If you modify libpng you may insert additional notices immediately following
* this sentence. * this sentence.
* *
* libpng versions 1.2.6, August 15, 2004, through 1.2.38beta01, June 5, 2009, are * libpng versions 1.2.6, August 15, 2004, through 1.2.38beta01, June 12, 2009, are
* Copyright (c) 2004, 2006-2009 Glenn Randers-Pehrson, and are * Copyright (c) 2004, 2006-2009 Glenn Randers-Pehrson, and are
* distributed according to the same disclaimer and license as libpng-1.2.5 * distributed according to the same disclaimer and license as libpng-1.2.5
* with the following individual added to the list of Contributing Authors: * with the following individual added to the list of Contributing Authors:
@ -372,7 +372,7 @@
* Y2K compliance in libpng: * Y2K compliance in libpng:
* ========================= * =========================
* *
* June 5, 2009 * June 12, 2009
* *
* Since the PNG Development group is an ad-hoc body, we can't make * Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration. * an official declaration.
@ -436,7 +436,7 @@
/* Version information for png.h - this should match the version in png.c */ /* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.2.38beta01" #define PNG_LIBPNG_VER_STRING "1.2.38beta01"
#define PNG_HEADER_VERSION_STRING \ #define PNG_HEADER_VERSION_STRING \
" libpng version 1.2.38beta01 - June 5, 2009\n" " libpng version 1.2.38beta01 - June 12, 2009\n"
#define PNG_LIBPNG_VER_SONUM 0 #define PNG_LIBPNG_VER_SONUM 0
#define PNG_LIBPNG_VER_DLLNUM 13 #define PNG_LIBPNG_VER_DLLNUM 13
@ -456,7 +456,7 @@
#define PNG_LIBPNG_BUILD_RC 3 #define PNG_LIBPNG_BUILD_RC 3
#define PNG_LIBPNG_BUILD_STABLE 4 #define PNG_LIBPNG_BUILD_STABLE 4
#define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7 #define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7
/* Release-Specific Flags */ /* Release-Specific Flags */
#define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with #define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with
PNG_LIBPNG_BUILD_STABLE only */ PNG_LIBPNG_BUILD_STABLE only */
@ -487,12 +487,12 @@
/* Ref MSDN: Private as priority over Special /* Ref MSDN: Private as priority over Special
* VS_FF_PRIVATEBUILD File *was not* built using standard release * VS_FF_PRIVATEBUILD File *was not* built using standard release
* procedures. If this value is given, the StringFileInfo block must * procedures. If this value is given, the StringFileInfo block must
* contain a PrivateBuild string. * contain a PrivateBuild string.
* *
* VS_FF_SPECIALBUILD File *was* built by the original company using * VS_FF_SPECIALBUILD File *was* built by the original company using
* standard release procedures but is a variation of the standard * standard release procedures but is a variation of the standard
* file of the same version number. If this value is given, the * file of the same version number. If this value is given, the
* StringFileInfo block must contain a SpecialBuild string. * StringFileInfo block must contain a SpecialBuild string.
*/ */
#if defined(PNG_USER_PRIVATEBUILD) #if defined(PNG_USER_PRIVATEBUILD)
@ -1399,7 +1399,7 @@ struct png_struct_def
png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */ png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */
#endif #endif
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
int num_chunk_list; int num_chunk_list;
png_bytep chunk_list; png_bytep chunk_list;
#endif #endif
@ -2501,7 +2501,7 @@ extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr,
#endif #endif
#endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */ #endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
/* provide a list of chunks and how they are to be handled, if the built-in /* provide a list of chunks and how they are to be handled, if the built-in
handling or default unknown chunk handling is not desired. Any chunks not handling or default unknown chunk handling is not desired. Any chunks not
listed will be handled in the default manner. The IHDR and IEND chunks listed will be handled in the default manner. The IHDR and IEND chunks
@ -2513,6 +2513,10 @@ extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr,
*/ */
extern PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp extern PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp
png_ptr, int keep, png_bytep chunk_list, int num_chunks)); png_ptr, int keep, png_bytep chunk_list, int num_chunks));
PNG_EXPORT(int,png_handle_as_unknown) PNGARG((png_structp png_ptr, png_bytep
chunk_name));
#endif
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
extern PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr, extern PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)); png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns));
extern PNG_EXPORT(void, png_set_unknown_chunk_location) extern PNG_EXPORT(void, png_set_unknown_chunk_location)
@ -2520,10 +2524,6 @@ extern PNG_EXPORT(void, png_set_unknown_chunk_location)
extern PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp extern PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp
png_ptr, png_infop info_ptr, png_unknown_chunkpp entries)); png_ptr, png_infop info_ptr, png_unknown_chunkpp entries));
#endif #endif
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
PNG_EXPORT(int,png_handle_as_unknown) PNGARG((png_structp png_ptr, png_bytep
chunk_name));
#endif
/* Png_free_data() will turn off the "valid" flag for anything it frees. /* Png_free_data() will turn off the "valid" flag for anything it frees.
If you need to turn it off for a chunk that your application has freed, If you need to turn it off for a chunk that your application has freed,

48
pngconf.h
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@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng /* pngconf.h - machine configurable file for libpng
* *
* libpng version 1.2.38beta01 - June 5, 2009 * libpng version 1.2.38beta01 - June 12, 2009
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2009 Glenn Randers-Pehrson * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@ -19,7 +19,7 @@
#define PNG_1_2_X #define PNG_1_2_X
/* /*
* PNG_USER_CONFIG has to be defined on the compiler command line. This * PNG_USER_CONFIG has to be defined on the compiler command line. This
* includes the resource compiler for Windows DLL configurations. * includes the resource compiler for Windows DLL configurations.
*/ */
@ -39,7 +39,7 @@
/* /*
* Added at libpng-1.2.8 * Added at libpng-1.2.8
* *
* If you create a private DLL you need to define in "pngusr.h" the followings: * If you create a private DLL you need to define in "pngusr.h" the followings:
* #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
* the DLL was built> * the DLL was built>
@ -50,8 +50,8 @@
* number and must match your private DLL name> * number and must match your private DLL name>
* e.g. // private DLL "libpng13gx.dll" * e.g. // private DLL "libpng13gx.dll"
* #define PNG_USER_DLLFNAME_POSTFIX "gx" * #define PNG_USER_DLLFNAME_POSTFIX "gx"
* *
* The following macros are also at your disposal if you want to complete the * The following macros are also at your disposal if you want to complete the
* DLL VERSIONINFO structure. * DLL VERSIONINFO structure.
* - PNG_USER_VERSIONINFO_COMMENTS * - PNG_USER_VERSIONINFO_COMMENTS
* - PNG_USER_VERSIONINFO_COMPANYNAME * - PNG_USER_VERSIONINFO_COMPANYNAME
@ -147,9 +147,9 @@
* 'Cygwin' defines/defaults: * 'Cygwin' defines/defaults:
* PNG_BUILD_DLL -- (ignored) building the dll * PNG_BUILD_DLL -- (ignored) building the dll
* (no define) -- (ignored) building an application, linking to the dll * (no define) -- (ignored) building an application, linking to the dll
* PNG_STATIC -- (ignored) building the static lib, or building an * PNG_STATIC -- (ignored) building the static lib, or building an
* application that links to the static lib. * application that links to the static lib.
* ALL_STATIC -- (ignored) building various static libs, or building an * ALL_STATIC -- (ignored) building various static libs, or building an
* application that links to the static libs. * application that links to the static libs.
* Thus, * Thus,
* a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
@ -162,12 +162,12 @@
* PNG_BUILD_DLL * PNG_BUILD_DLL
* PNG_STATIC * PNG_STATIC
* (nothing) == PNG_USE_DLL * (nothing) == PNG_USE_DLL
* *
* CYGWIN (2002-01-20): The preceding is now obsolete. With the advent * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
* of auto-import in binutils, we no longer need to worry about * of auto-import in binutils, we no longer need to worry about
* __declspec(dllexport) / __declspec(dllimport) and friends. Therefore, * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore,
* we don't need to worry about PNG_STATIC or ALL_STATIC when it comes * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
* to __declspec() stuff. However, we DO need to worry about * to __declspec() stuff. However, we DO need to worry about
* PNG_BUILD_DLL and PNG_STATIC because those change some defaults * PNG_BUILD_DLL and PNG_STATIC because those change some defaults
* such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed. * such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed.
*/ */
@ -211,8 +211,8 @@
# if !defined(PNG_DLL) # if !defined(PNG_DLL)
# define PNG_DLL # define PNG_DLL
# endif # endif
# endif # endif
# endif # endif
# endif # endif
#endif #endif
@ -487,7 +487,7 @@
* iTXt support was added. iTXt support was turned off by default through * iTXt support was added. iTXt support was turned off by default through
* libpng-1.2.x, to support old apps that malloc the png_text structure * libpng-1.2.x, to support old apps that malloc the png_text structure
* instead of calling png_set_text() and letting libpng malloc it. It * instead of calling png_set_text() and letting libpng malloc it. It
* was turned on by default in libpng-1.3.0. * was turned on by default in libpng-1.4.0.
*/ */
#if defined(PNG_1_0_X) || defined (PNG_1_2_X) #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
@ -741,7 +741,7 @@
# define PNG_EASY_ACCESS_SUPPORTED # define PNG_EASY_ACCESS_SUPPORTED
#endif #endif
/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0 /* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0
* and removed from version 1.2.20. The following will be removed * and removed from version 1.2.20. The following will be removed
* from libpng-1.4.0 * from libpng-1.4.0
*/ */
@ -945,9 +945,6 @@
# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
# define PNG_UNKNOWN_CHUNKS_SUPPORTED # define PNG_UNKNOWN_CHUNKS_SUPPORTED
# endif # endif
# ifndef PNG_NO_HANDLE_AS_UNKNOWN
# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
# endif
#endif #endif
#if !defined(PNG_NO_READ_USER_CHUNKS) && \ #if !defined(PNG_NO_READ_USER_CHUNKS) && \
defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
@ -960,6 +957,11 @@
# undef PNG_NO_HANDLE_AS_UNKNOWN # undef PNG_NO_HANDLE_AS_UNKNOWN
# endif # endif
#endif #endif
#ifndef PNG_NO_HANDLE_AS_UNKNOWN
# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
# endif
#endif
#ifndef PNG_NO_READ_OPT_PLTE #ifndef PNG_NO_READ_OPT_PLTE
# define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */ # define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
#endif /* optional PLTE chunk in RGB and RGBA images */ #endif /* optional PLTE chunk in RGB and RGBA images */
@ -1087,10 +1089,10 @@
# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
# define PNG_UNKNOWN_CHUNKS_SUPPORTED # define PNG_UNKNOWN_CHUNKS_SUPPORTED
# endif # endif
# ifndef PNG_NO_HANDLE_AS_UNKNOWN #endif
# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED #ifndef PNG_NO_HANDLE_AS_UNKNOWN
# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED # ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
# endif # define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
# endif # endif
#endif #endif
#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \ #if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \
@ -1248,7 +1250,7 @@ typedef char FAR * FAR * FAR * png_charppp;
#if defined(PNG_1_0_X) || defined(PNG_1_2_X) #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
/* SPC - Is this stuff deprecated? */ /* SPC - Is this stuff deprecated? */
/* It'll be removed as of libpng-1.3.0 - GR-P */ /* It'll be removed as of libpng-1.4.0 - GR-P */
/* libpng typedefs for types in zlib. If zlib changes /* libpng typedefs for types in zlib. If zlib changes
* or another compression library is used, then change these. * or another compression library is used, then change these.
* Eliminates need to change all the source files. * Eliminates need to change all the source files.
@ -1321,7 +1323,7 @@ typedef z_stream FAR * png_zstreamp;
# define PNGAPI __cdecl # define PNGAPI __cdecl
# undef PNG_IMPEXP # undef PNG_IMPEXP
# define PNG_IMPEXP # define PNG_IMPEXP
#endif #endif
/* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall", /* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
* you may get warnings regarding the linkage of png_zalloc and png_zfree. * you may get warnings regarding the linkage of png_zalloc and png_zfree.

16
pngrtran.c
View File

@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers /* pngrtran.c - transforms the data in a row for PNG readers
* *
* Last changed in libpng 1.2.37 [June 4, 2009] * Last changed in libpng 1.2.38 [June 12, 2009]
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2009 Glenn Randers-Pehrson * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@ -1177,10 +1177,6 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
{ {
if (png_ptr->transformations & PNG_EXPAND_tRNS) if (png_ptr->transformations & PNG_EXPAND_tRNS)
info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
#if 0 /* Removed from libpng-1.2.27 */
else
info_ptr->color_type |= PNG_COLOR_MASK_COLOR;
#endif
} }
if (info_ptr->bit_depth < 8) if (info_ptr->bit_depth < 8)
info_ptr->bit_depth = 8; info_ptr->bit_depth = 8;
@ -1374,12 +1370,12 @@ png_do_read_transformations(png_structp png_ptr)
#endif #endif
/* From Andreas Dilger e-mail to png-implement, 26 March 1998: /* From Andreas Dilger e-mail to png-implement, 26 March 1998:
* *
* In most cases, the "simple transparency" should be done prior to doing * In most cases, the "simple transparency" should be done prior to doing
* gray-to-RGB, or you will have to test 3x as many bytes to check if a * gray-to-RGB, or you will have to test 3x as many bytes to check if a
* pixel is transparent. You would also need to make sure that the * pixel is transparent. You would also need to make sure that the
* transparency information is upgraded to RGB. * transparency information is upgraded to RGB.
* *
* To summarize, the current flow is: * To summarize, the current flow is:
* - Gray + simple transparency -> compare 1 or 2 gray bytes and composite * - Gray + simple transparency -> compare 1 or 2 gray bytes and composite
* with background "in place" if transparent, * with background "in place" if transparent,
@ -4202,7 +4198,7 @@ png_build_gamma_table(png_structp png_ptr)
png_ptr->gamma_16_table = (png_uint_16pp)png_malloc(png_ptr, png_ptr->gamma_16_table = (png_uint_16pp)png_malloc(png_ptr,
(png_uint_32)(num * png_sizeof(png_uint_16p))); (png_uint_32)(num * png_sizeof(png_uint_16p)));
png_memset(png_ptr->gamma_16_table, 0, num * png_sizeof(png_uint_16p)); png_memset(png_ptr->gamma_16_table, 0, num * png_sizeof(png_uint_16p));
if (png_ptr->transformations & (PNG_16_TO_8 | PNG_BACKGROUND)) if (png_ptr->transformations & (PNG_16_TO_8 | PNG_BACKGROUND))
{ {
@ -4264,7 +4260,7 @@ png_build_gamma_table(png_structp png_ptr)
png_ptr->gamma_16_to_1 = (png_uint_16pp)png_malloc(png_ptr, png_ptr->gamma_16_to_1 = (png_uint_16pp)png_malloc(png_ptr,
(png_uint_32)(num * png_sizeof(png_uint_16p ))); (png_uint_32)(num * png_sizeof(png_uint_16p )));
png_memset(png_ptr->gamma_16_to_1, 0, num * png_sizeof(png_uint_16p)); png_memset(png_ptr->gamma_16_to_1, 0, num * png_sizeof(png_uint_16p));
for (i = 0; i < num; i++) for (i = 0; i < num; i++)
{ {
@ -4290,7 +4286,7 @@ png_build_gamma_table(png_structp png_ptr)
png_ptr->gamma_16_from_1 = (png_uint_16pp)png_malloc(png_ptr, png_ptr->gamma_16_from_1 = (png_uint_16pp)png_malloc(png_ptr,
(png_uint_32)(num * png_sizeof(png_uint_16p))); (png_uint_32)(num * png_sizeof(png_uint_16p)));
png_memset(png_ptr->gamma_16_from_1, 0, png_memset(png_ptr->gamma_16_from_1, 0,
num * png_sizeof(png_uint_16p)); num * png_sizeof(png_uint_16p));
for (i = 0; i < num; i++) for (i = 0; i < num; i++)
{ {

15
pngrutil.c
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@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file /* pngrutil.c - utilities to read a PNG file
* *
* Last changed in libpng 1.2.37 [June 4, 2009] * Last changed in libpng 1.2.38 [June 12, 2009]
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2009 Glenn Randers-Pehrson * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@ -2251,7 +2251,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if (!(png_ptr->chunk_name[0] & 0x20)) if (!(png_ptr->chunk_name[0] & 0x20))
{ {
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) #if defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) != if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS PNG_HANDLE_CHUNK_ALWAYS
#if defined(PNG_READ_USER_CHUNKS_SUPPORTED) #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
@ -2263,8 +2263,11 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
} }
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) #if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) || if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
(png_ptr->read_user_chunk_fn != NULL)) #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
|| (png_ptr->read_user_chunk_fn != NULL)
#endif
)
{ {
#ifdef PNG_MAX_MALLOC_64K #ifdef PNG_MAX_MALLOC_64K
if (length > (png_uint_32)65535L) if (length > (png_uint_32)65535L)
@ -2275,7 +2278,7 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
} }
#endif #endif
png_memcpy((png_charp)png_ptr->unknown_chunk.name, png_memcpy((png_charp)png_ptr->unknown_chunk.name,
(png_charp)png_ptr->chunk_name, (png_charp)png_ptr->chunk_name,
png_sizeof(png_ptr->unknown_chunk.name)); png_sizeof(png_ptr->unknown_chunk.name));
png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name)-1] = '\0'; png_ptr->unknown_chunk.name[png_sizeof(png_ptr->unknown_chunk.name)-1] = '\0';
png_ptr->unknown_chunk.size = (png_size_t)length; png_ptr->unknown_chunk.size = (png_size_t)length;
@ -2298,8 +2301,10 @@ png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if (ret == 0) if (ret == 0)
{ {
if (!(png_ptr->chunk_name[0] & 0x20)) if (!(png_ptr->chunk_name[0] & 0x20))
#if defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) != if (png_handle_as_unknown(png_ptr, png_ptr->chunk_name) !=
PNG_HANDLE_CHUNK_ALWAYS) PNG_HANDLE_CHUNK_ALWAYS)
#endif
png_chunk_error(png_ptr, "unknown critical chunk"); png_chunk_error(png_ptr, "unknown critical chunk");
png_set_unknown_chunks(png_ptr, info_ptr, png_set_unknown_chunks(png_ptr, info_ptr,
&png_ptr->unknown_chunk, 1); &png_ptr->unknown_chunk, 1);

8
pngset.c
View File

@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct /* pngset.c - storage of image information into info struct
* *
* Last changed in libpng 1.2.37 [June 4, 2009] * Last changed in libpng 1.2.38 [June 12, 2009]
* For conditions of distribution and use, see copyright notice in png.h * For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2009 Glenn Randers-Pehrson * Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@ -1004,7 +1004,7 @@ png_set_sPLT(png_structp png_ptr,
} }
#endif /* PNG_sPLT_SUPPORTED */ #endif /* PNG_sPLT_SUPPORTED */
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) #if defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
void PNGAPI void PNGAPI
png_set_unknown_chunks(png_structp png_ptr, png_set_unknown_chunks(png_structp png_ptr,
png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns) png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
@ -1035,8 +1035,8 @@ png_set_unknown_chunks(png_structp png_ptr,
png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
png_unknown_chunkp from = unknowns + i; png_unknown_chunkp from = unknowns + i;
png_memcpy((png_charp)to->name, png_memcpy((png_charp)to->name,
(png_charp)from->name, (png_charp)from->name,
png_sizeof(from->name)); png_sizeof(from->name));
to->name[png_sizeof(to->name)-1] = '\0'; to->name[png_sizeof(to->name)-1] = '\0';
to->size = from->size; to->size = from->size;