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[CHG] libpng updated to version 1.4.5
This commit is contained in:
Crayon2000
parent
6cfd5e4106
commit
82582fcbca
13 changed files with 210 additions and 117 deletions
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@ -17,11 +17,7 @@
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#include "pngpriv.h"
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/* Generate a compiler error if there is an old png.h in the search path. */
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typedef version_1_4_4 Your_png_h_is_not_version_1_4_4;
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/* Version information for C files. This had better match the version
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* string defined in png.h.
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*/
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typedef version_1_4_5 Your_png_h_is_not_version_1_4_5;
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/* Tells libpng that we have already handled the first "num_bytes" bytes
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* of the PNG file signature. If the PNG data is embedded into another
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@ -551,13 +547,13 @@ png_get_copyright(png_structp png_ptr)
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#else
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#ifdef __STDC__
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return ((png_charp) PNG_STRING_NEWLINE \
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"libpng version 1.4.4 - September 23, 2010" PNG_STRING_NEWLINE \
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"libpng version 1.4.5 - December 9, 2010" PNG_STRING_NEWLINE \
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"Copyright (c) 1998-2010 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
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"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
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"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
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PNG_STRING_NEWLINE);
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#else
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return ((png_charp) "libpng version 1.4.4 - September 23, 2010\
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return ((png_charp) "libpng version 1.4.5 - December 9, 2010\
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Copyright (c) 1998-2010 Glenn Randers-Pehrson\
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Copyright (c) 1996-1997 Andreas Dilger\
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Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");
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@ -678,7 +674,7 @@ png_convert_size(size_t size)
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*/
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void /* PRIVATE */
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png_64bit_product (long v1, long v2, unsigned long *hi_product,
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png_64bit_product(long v1, long v2, unsigned long *hi_product,
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unsigned long *lo_product)
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{
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int a, b, c, d;
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@ -1,7 +1,7 @@
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/* png.h - header file for PNG reference library
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*
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* libpng version 1.4.4 - September 23, 2010
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* libpng version 1.4.5 - December 9, 2010
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* Copyright (c) 1998-2010 Glenn Randers-Pehrson
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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@ -11,7 +11,7 @@
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* Authors and maintainers:
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* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
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* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
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* libpng versions 0.97, January 1998, through 1.4.4 - September 23, 2010: Glenn
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* libpng versions 0.97, January 1998, through 1.4.5 - December 9, 2010: Glenn
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* See also "Contributing Authors", below.
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*
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* Note about libpng version numbers:
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@ -146,7 +146,13 @@
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* 1.4.3rc01-03 14 10403 14.so.14.3[.0]
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* 1.4.3 14 10403 14.so.14.3[.0]
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* 1.4.4beta01-08 14 10404 14.so.14.4[.0]
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* 1.4.4rc01-06 14 10404 14.so.14.4[.0]
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* 1.4.4rc01-05 14 10404 14.so.14.4[.0]
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* 1.4.4 14 10404 14.so.14.4[.0]
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* 1.4.5beta01-04 14 10405 14.so.14.5[.0]
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* 1.4.5rc01 14 10405 14.so.14.5[.0]
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* 1.4.5beta05-07 14 10405 14.so.14.5[.0]
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* 1.4.5rc02-03 14 10405 14.so.14.5[.0]
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* 1.4.5 14 10405 14.so.14.5[.0]
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*
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* Henceforth the source version will match the shared-library major
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* and minor numbers; the shared-library major version number will be
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@ -178,7 +184,7 @@
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*
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* This code is released under the libpng license.
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*
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* libpng versions 1.2.6, August 15, 2004, through 1.4.4, September 23, 2010, are
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* libpng versions 1.2.6, August 15, 2004, through 1.4.5, December 9, 2010, are
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* Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are
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* distributed according to the same disclaimer and license as libpng-1.2.5
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* with the following individual added to the list of Contributing Authors:
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@ -290,13 +296,13 @@
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* Y2K compliance in libpng:
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* =========================
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*
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* September 23, 2010
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* December 9, 2010
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*
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* Since the PNG Development group is an ad-hoc body, we can't make
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* an official declaration.
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*
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* This is your unofficial assurance that libpng from version 0.71 and
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* upward through 1.4.4 are Y2K compliant. It is my belief that earlier
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* upward through 1.4.5 are Y2K compliant. It is my belief that earlier
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* versions were also Y2K compliant.
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*
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* Libpng only has three year fields. One is a 2-byte unsigned integer
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@ -352,9 +358,9 @@
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*/
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/* Version information for png.h - this should match the version in png.c */
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#define PNG_LIBPNG_VER_STRING "1.4.4"
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#define PNG_LIBPNG_VER_STRING "1.4.5"
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#define PNG_HEADER_VERSION_STRING \
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" libpng version 1.4.4 - September 23, 2010\n"
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" libpng version 1.4.5 - December 9, 2010\n"
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#define PNG_LIBPNG_VER_SONUM 14
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#define PNG_LIBPNG_VER_DLLNUM 14
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@ -362,7 +368,7 @@
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/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
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#define PNG_LIBPNG_VER_MAJOR 1
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#define PNG_LIBPNG_VER_MINOR 4
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#define PNG_LIBPNG_VER_RELEASE 4
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#define PNG_LIBPNG_VER_RELEASE 5
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/* This should match the numeric part of the final component of
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* PNG_LIBPNG_VER_STRING, omitting any leading zero:
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*/
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@ -392,7 +398,7 @@
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* version 1.0.0 was mis-numbered 100 instead of 10000). From
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* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
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*/
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#define PNG_LIBPNG_VER 10404 /* 1.4.4 */
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#define PNG_LIBPNG_VER 10405 /* 1.4.5 */
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#ifndef PNG_VERSION_INFO_ONLY
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/* Include the compression library's header */
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@ -1476,7 +1482,7 @@ struct png_struct_def
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/* This triggers a compiler error in png.c, if png.c and png.h
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* do not agree upon the version number.
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*/
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typedef png_structp version_1_4_4;
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typedef png_structp version_1_4_5;
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typedef png_struct FAR * FAR * png_structpp;
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@ -2645,12 +2651,24 @@ PNG_EXPORT(png_bytep,png_get_io_chunk_name)
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((png_uint_32)(*((buf) + 1)) << 16) + \
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((png_uint_32)(*((buf) + 2)) << 8) + \
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((png_uint_32)(*((buf) + 3))))
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/* The following definition introduces an API incompatibility (but not
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* an ABI incompatibility) with libpng-1.4.0 through 1.4.4. Prior to
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* libpng-1.4.5 the macro, which is used by default, returned (incorrectly)
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* a (png_uint_32), while the function, if used instead, correctly returned
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* a (png_uint_16).
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*
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* Libpng versions 1.0.x and 1.2.x only used a function so are not affected
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* by this potential API incompatibility between macros.
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*/
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# define png_get_uint_16(buf) \
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(((png_uint_32)(*(buf)) << 8) + \
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((png_uint_32)(*((buf) + 1))))
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((png_uint_16) \
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(((unsigned int)(*(buf)) << 8) + \
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((unsigned int)(*((buf) + 1)))))
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# define png_get_int_32(buf) \
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((png_int_32)((*(buf) & 0x80) \
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? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffff)+1)) \
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? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \
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: (png_int_32)png_get_uint_32(buf)))
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#else
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PNG_EXPORT(png_uint_32,png_get_uint_32) PNGARG((png_bytep buf));
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@ -1,7 +1,7 @@
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/* pngconf.h - machine configurable file for libpng
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*
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* libpng version 1.4.4 - September 23, 2010
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* libpng version 1.4.5 - December 9, 2010
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* For conditions of distribution and use, see copyright notice in png.h
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* Copyright (c) 1998-2010 Glenn Randers-Pehrson
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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@ -858,7 +858,7 @@ png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
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#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
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png_byte PNGAPI
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png_get_rgb_to_gray_status (png_structp png_ptr)
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png_get_rgb_to_gray_status(png_structp png_ptr)
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{
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return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
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}
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@ -883,24 +883,24 @@ png_get_compression_buffer_size(png_structp png_ptr)
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/* These functions were added to libpng 1.2.6 and were enabled
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* by default in libpng-1.4.0 */
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png_uint_32 PNGAPI
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png_get_user_width_max (png_structp png_ptr)
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png_get_user_width_max(png_structp png_ptr)
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{
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return (png_ptr? png_ptr->user_width_max : 0);
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}
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png_uint_32 PNGAPI
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png_get_user_height_max (png_structp png_ptr)
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png_get_user_height_max(png_structp png_ptr)
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{
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return (png_ptr? png_ptr->user_height_max : 0);
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}
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/* This function was added to libpng 1.4.0 */
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png_uint_32 PNGAPI
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png_get_chunk_cache_max (png_structp png_ptr)
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png_get_chunk_cache_max(png_structp png_ptr)
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{
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return (png_ptr? png_ptr->user_chunk_cache_max : 0);
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}
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/* This function was added to libpng 1.4.1 */
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png_alloc_size_t PNGAPI
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png_get_chunk_malloc_max (png_structp png_ptr)
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png_get_chunk_malloc_max(png_structp png_ptr)
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{
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return (png_ptr?
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png_ptr->user_chunk_malloc_max : 0);
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@ -910,13 +910,13 @@ png_get_chunk_malloc_max (png_structp png_ptr)
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/* These functions were added to libpng 1.4.0 */
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#ifdef PNG_IO_STATE_SUPPORTED
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png_uint_32 PNGAPI
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png_get_io_state (png_structp png_ptr)
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png_get_io_state(png_structp png_ptr)
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{
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return png_ptr->io_state;
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}
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png_bytep PNGAPI
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png_get_io_chunk_name (png_structp png_ptr)
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png_get_io_chunk_name(png_structp png_ptr)
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{
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return png_ptr->chunk_name;
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}
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@ -1109,6 +1109,8 @@ png_push_process_row(png_structp png_ptr)
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break;
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}
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default:
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case 6:
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{
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png_push_have_row(png_ptr, png_ptr->row_buf + 1);
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@ -1726,7 +1728,7 @@ png_push_have_row(png_structp png_ptr, png_bytep row)
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}
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void PNGAPI
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png_progressive_combine_row (png_structp png_ptr,
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png_progressive_combine_row(png_structp png_ptr,
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png_bytep old_row, png_bytep new_row)
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{
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PNG_CONST int FARDATA png_pass_dsp_mask[7] =
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@ -1,7 +1,7 @@
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/* pngpriv.h - private declarations for use inside libpng
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*
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* libpng version 1.4.4 - September 23, 2010
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* libpng version 1.4.5 - December 9, 2010
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* For conditions of distribution and use, see copyright notice in png.h
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* Copyright (c) 1998-2010 Glenn Randers-Pehrson
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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@ -290,6 +290,9 @@ PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr));
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PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, png_bytep data,
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png_size_t length));
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/* Read and check the PNG file signature */
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PNG_EXTERN void png_read_sig PNGARG((png_structp png_ptr, png_infop info_ptr));
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/* Read the chunk header (length + type name) */
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PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr));
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@ -1,7 +1,7 @@
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/* pngread.c - read a PNG file
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*
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* Last changed in libpng 1.4.1 [February 25, 2010]
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* Last changed in libpng 1.4.5 [December 9, 2010]
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* Copyright (c) 1998-2010 Glenn Randers-Pehrson
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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@ -214,34 +214,12 @@ void PNGAPI
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png_read_info(png_structp png_ptr, png_infop info_ptr)
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{
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png_debug(1, "in png_read_info");
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if (png_ptr == NULL || info_ptr == NULL)
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return;
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/* If we haven't checked all of the PNG signature bytes, do so now. */
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if (png_ptr->sig_bytes < 8)
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{
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png_size_t num_checked = png_ptr->sig_bytes,
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num_to_check = 8 - num_checked;
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#ifdef PNG_IO_STATE_SUPPORTED
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png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE;
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#endif
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png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check);
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png_ptr->sig_bytes = 8;
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if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
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{
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if (num_checked < 4 &&
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png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
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png_error(png_ptr, "Not a PNG file");
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else
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png_error(png_ptr, "PNG file corrupted by ASCII conversion");
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}
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if (num_checked < 3)
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png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
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}
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/* Read and check the PNG file signature. */
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png_read_sig(png_ptr, info_ptr);
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for (;;)
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{
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@ -426,7 +404,7 @@ void PNGAPI
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png_read_update_info(png_structp png_ptr, png_infop info_ptr)
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{
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png_debug(1, "in png_read_update_info");
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if (png_ptr == NULL)
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return;
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if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
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@ -448,7 +426,7 @@ void PNGAPI
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png_start_read_image(png_structp png_ptr)
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{
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png_debug(1, "in png_start_read_image");
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if (png_ptr == NULL)
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return;
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if (!(png_ptr->flags & PNG_FLAG_ROW_INIT))
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@ -465,10 +443,10 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
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0xff};
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PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
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int ret;
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if (png_ptr == NULL)
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return;
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png_debug2(1, "in png_read_row (row %lu, pass %d)",
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(unsigned long) png_ptr->row_number, png_ptr->pass);
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@ -524,6 +502,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
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return;
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}
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break;
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case 1:
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if ((png_ptr->row_number & 0x07) || png_ptr->width < 5)
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{
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@ -534,6 +513,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
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return;
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}
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break;
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case 2:
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if ((png_ptr->row_number & 0x07) != 4)
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{
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@ -544,6 +524,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
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return;
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}
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break;
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case 3:
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if ((png_ptr->row_number & 3) || png_ptr->width < 3)
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{
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@ -554,6 +535,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
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return;
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}
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break;
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case 4:
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if ((png_ptr->row_number & 3) != 2)
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{
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@ -564,6 +546,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
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return;
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}
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break;
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case 5:
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if ((png_ptr->row_number & 1) || png_ptr->width < 2)
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{
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@ -574,6 +557,8 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
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return;
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}
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break;
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default:
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case 6:
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if (!(png_ptr->row_number & 1))
|
||||
{
|
||||
|
|
@ -724,7 +709,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
|
|||
png_bytepp dp;
|
||||
|
||||
png_debug(1, "in png_read_rows");
|
||||
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
rp = row;
|
||||
|
|
@ -775,7 +760,7 @@ png_read_image(png_structp png_ptr, png_bytepp image)
|
|||
png_bytepp rp;
|
||||
|
||||
png_debug(1, "in png_read_image");
|
||||
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
|
|
@ -813,7 +798,7 @@ void PNGAPI
|
|||
png_read_end(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
png_debug(1, "in png_read_end");
|
||||
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
|
||||
|
|
@ -993,7 +978,7 @@ png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr,
|
|||
#endif
|
||||
|
||||
png_debug(1, "in png_destroy_read_struct");
|
||||
|
||||
|
||||
if (png_ptr_ptr != NULL)
|
||||
png_ptr = *png_ptr_ptr;
|
||||
if (png_ptr == NULL)
|
||||
|
|
@ -1069,7 +1054,7 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr,
|
|||
#endif
|
||||
|
||||
png_debug(1, "in png_read_destroy");
|
||||
|
||||
|
||||
if (info_ptr != NULL)
|
||||
png_info_destroy(png_ptr, info_ptr);
|
||||
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngrio.c - functions for data input
|
||||
*
|
||||
* Last changed in libpng 1.4.1 [February 25, 2010]
|
||||
* Last changed in libpng 1.4.5 [December 9, 2010]
|
||||
* Copyright (c) 1998-2010 Glenn Randers-Pehrson
|
||||
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
|
||||
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
|
||||
|
|
@ -33,7 +33,7 @@ void /* PRIVATE */
|
|||
png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
{
|
||||
png_debug1(4, "reading %d bytes", (int)length);
|
||||
|
||||
|
||||
if (png_ptr->read_data_fn != NULL)
|
||||
(*(png_ptr->read_data_fn))(png_ptr, data, length);
|
||||
else
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngrtran.c - transforms the data in a row for PNG readers
|
||||
*
|
||||
* Last changed in libpng 1.4.2 [May 6, 2010]
|
||||
* Last changed in libpng 1.4.5 [December 9, 2010]
|
||||
* Copyright (c) 1998-2010 Glenn Randers-Pehrson
|
||||
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
|
||||
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
|
||||
|
|
@ -26,7 +26,7 @@ void PNGAPI
|
|||
png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action)
|
||||
{
|
||||
png_debug(1, "in png_set_crc_action");
|
||||
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
|
|
@ -98,7 +98,7 @@ png_set_background(png_structp png_ptr,
|
|||
int need_expand, double background_gamma)
|
||||
{
|
||||
png_debug(1, "in png_set_background");
|
||||
|
||||
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN)
|
||||
|
|
@ -686,6 +686,11 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
|
|||
break;
|
||||
|
||||
case 3: png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR;
|
||||
break;
|
||||
|
||||
default:
|
||||
png_error(png_ptr, "invalid error action in png_set_rgb_to_gray");
|
||||
break;
|
||||
}
|
||||
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
|
||||
#ifdef PNG_READ_EXPAND_SUPPORTED
|
||||
|
|
@ -828,6 +833,8 @@ png_init_read_transformations(png_structp png_ptr)
|
|||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
|
||||
case 8:
|
||||
|
||||
case 16:
|
||||
|
|
@ -1028,6 +1035,9 @@ png_init_read_transformations(png_structp png_ptr)
|
|||
gs = 1.0 / (png_ptr->background_gamma *
|
||||
png_ptr->screen_gamma);
|
||||
break;
|
||||
|
||||
default:
|
||||
png_error(png_ptr, "invalid background gamma type");
|
||||
}
|
||||
|
||||
png_ptr->background_1.gray = (png_uint_16)(pow(
|
||||
|
|
@ -1626,6 +1636,9 @@ png_do_unpack(png_row_infop row_info, png_bytep row)
|
|||
}
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
row_info->bit_depth = 8;
|
||||
row_info->pixel_depth = (png_byte)(8 * row_info->channels);
|
||||
|
|
@ -1682,6 +1695,9 @@ png_do_unshift(png_row_infop row_info, png_bytep row, png_color_8p sig_bits)
|
|||
|
||||
switch (row_info->bit_depth)
|
||||
{
|
||||
default:
|
||||
break;
|
||||
|
||||
case 2:
|
||||
{
|
||||
png_bytep bp;
|
||||
|
|
@ -2798,6 +2814,9 @@ png_do_background(png_row_infop row_info, png_bytep row,
|
|||
}
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
|
@ -3230,6 +3249,9 @@ png_do_background(png_row_infop row_info, png_bytep row,
|
|||
}
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
|
||||
|
|
@ -3428,6 +3450,9 @@ png_do_gamma(png_row_infop row_info, png_bytep row,
|
|||
}
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -3522,6 +3547,9 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row,
|
|||
}
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
row_info->bit_depth = 8;
|
||||
row_info->pixel_depth = 8;
|
||||
|
|
@ -3672,6 +3700,9 @@ png_do_expand(png_row_infop row_info, png_bytep row,
|
|||
}
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
row_info->bit_depth = 8;
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngrutil.c - utilities to read a PNG file
|
||||
*
|
||||
* Last changed in libpng 1.4.4 [August 26, 2010]
|
||||
* Last changed in libpng 1.4.5 [December 9, 2010]
|
||||
* Copyright (c) 1998-2010 Glenn Randers-Pehrson
|
||||
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
|
||||
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
|
||||
|
|
@ -23,23 +23,29 @@
|
|||
png_uint_32 PNGAPI
|
||||
png_get_uint_31(png_structp png_ptr, png_bytep buf)
|
||||
{
|
||||
png_uint_32 i = png_get_uint_32(buf);
|
||||
if (i > PNG_UINT_31_MAX)
|
||||
png_uint_32 val = png_get_uint_32(buf);
|
||||
|
||||
if (val > PNG_UINT_31_MAX)
|
||||
png_error(png_ptr, "PNG unsigned integer out of range");
|
||||
return (i);
|
||||
return (val);
|
||||
}
|
||||
|
||||
#ifndef PNG_USE_READ_MACROS
|
||||
/* The parentheses around "PNGAPI function_name" in the following three
|
||||
* functions are necessary because they allow the macros to co-exist with
|
||||
* these (unused but exported) functions.
|
||||
*/
|
||||
|
||||
/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */
|
||||
png_uint_32 (PNGAPI
|
||||
png_get_uint_32)(png_bytep buf)
|
||||
{
|
||||
png_uint_32 i =
|
||||
((png_uint_32)(*(buf )) << 24) +
|
||||
((png_uint_32)(*(buf + 1)) << 16) +
|
||||
((png_uint_32)(*(buf + 2)) << 8) +
|
||||
((png_uint_32)(*(buf + 3)) ) ;
|
||||
png_uint_32 uval = png_get_uint_32(buf);
|
||||
if ((uval & 0x80000000L) == 0) /* non-negative */
|
||||
return uval;
|
||||
|
||||
return (i);
|
||||
uval = (uval ^ 0xffffffffL) + 1; /* 2's complement: -x = ~x+1 */
|
||||
return -(png_int_32)uval;
|
||||
}
|
||||
|
||||
/* Grab a signed 32-bit integer from a buffer in big-endian format. The
|
||||
|
|
@ -50,26 +56,65 @@ png_get_uint_32)(png_bytep buf)
|
|||
png_int_32 (PNGAPI
|
||||
png_get_int_32)(png_bytep buf)
|
||||
{
|
||||
png_uint_32 u = png_get_uint_32(buf);
|
||||
if ((u & 0x80000000) == 0) /* non-negative */
|
||||
return u;
|
||||
png_uint_32 uval = png_get_uint_32(buf);
|
||||
if ((uval & 0x80000000L) == 0) /* non-negative */
|
||||
return uval;
|
||||
|
||||
u = (u ^ 0xffffffff) + 1; /* 2's complement: -x = ~x+1 */
|
||||
return -(png_int_32)u;
|
||||
uval = (uval ^ 0xffffffffL) + 1; /* 2's complement: -x = ~x+1 */
|
||||
return -(png_int_32)uval;
|
||||
}
|
||||
|
||||
/* Grab an unsigned 16-bit integer from a buffer in big-endian format. */
|
||||
png_uint_16 (PNGAPI
|
||||
png_get_uint_16)(png_bytep buf)
|
||||
{
|
||||
png_uint_16 i =
|
||||
((png_uint_32)(*buf) << 8) +
|
||||
((png_uint_32)(*(buf + 1)));
|
||||
/* ANSI-C requires an int value to accomodate at least 16 bits so this
|
||||
* works and allows the compiler not to worry about possible narrowing
|
||||
* on 32 bit systems. (Pre-ANSI systems did not make integers smaller
|
||||
* than 16 bits either.)
|
||||
*/
|
||||
unsigned int val =
|
||||
((unsigned int)(*buf) << 8) +
|
||||
((unsigned int)(*(buf + 1)));
|
||||
|
||||
return (i);
|
||||
return (png_uint_16)val;
|
||||
}
|
||||
#endif /* PNG_USE_READ_MACROS */
|
||||
|
||||
/* Read and check the PNG file signature */
|
||||
void /* PRIVATE */
|
||||
png_read_sig(png_structp png_ptr, png_infop info_ptr)
|
||||
{
|
||||
png_size_t num_checked, num_to_check;
|
||||
|
||||
/* Exit if the user application does not expect a signature. */
|
||||
if (png_ptr->sig_bytes >= 8)
|
||||
return;
|
||||
|
||||
num_checked = png_ptr->sig_bytes;
|
||||
num_to_check = 8 - num_checked;
|
||||
|
||||
#ifdef PNG_IO_STATE_SUPPORTED
|
||||
png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE;
|
||||
#endif
|
||||
|
||||
/* The signature must be serialized in a single I/O call. */
|
||||
png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check);
|
||||
png_ptr->sig_bytes = 8;
|
||||
|
||||
if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
|
||||
{
|
||||
if (num_checked < 4 &&
|
||||
png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
|
||||
png_error(png_ptr, "Not a PNG file");
|
||||
|
||||
else
|
||||
png_error(png_ptr, "PNG file corrupted by ASCII conversion");
|
||||
}
|
||||
if (num_checked < 3)
|
||||
png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE;
|
||||
}
|
||||
|
||||
/* Read the chunk header (length + type name).
|
||||
* Put the type name into png_ptr->chunk_name, and return the length.
|
||||
*/
|
||||
|
|
@ -80,32 +125,31 @@ png_read_chunk_header(png_structp png_ptr)
|
|||
png_uint_32 length;
|
||||
|
||||
#ifdef PNG_IO_STATE_SUPPORTED
|
||||
/* Inform the I/O callback that the chunk header is being read.
|
||||
* PNG_IO_CHUNK_HDR requires a single I/O call.
|
||||
*/
|
||||
png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_HDR;
|
||||
#endif
|
||||
|
||||
/* Read the length and the chunk name */
|
||||
/* Read the length and the chunk name.
|
||||
* This must be performed in a single I/O call.
|
||||
*/
|
||||
png_read_data(png_ptr, buf, 8);
|
||||
length = png_get_uint_31(png_ptr, buf);
|
||||
|
||||
/* Put the chunk name into png_ptr->chunk_name */
|
||||
/* Put the chunk name into png_ptr->chunk_name. */
|
||||
png_memcpy(png_ptr->chunk_name, buf + 4, 4);
|
||||
|
||||
png_debug2(0, "Reading %s chunk, length = %lu",
|
||||
png_ptr->chunk_name, length);
|
||||
|
||||
/* Reset the crc and run it over the chunk name */
|
||||
/* Reset the crc and run it over the chunk name. */
|
||||
png_reset_crc(png_ptr);
|
||||
png_calculate_crc(png_ptr, png_ptr->chunk_name, 4);
|
||||
|
||||
/* Check to see if chunk name is valid */
|
||||
/* Check to see if chunk name is valid. */
|
||||
png_check_chunk_name(png_ptr, png_ptr->chunk_name);
|
||||
|
||||
#ifdef PNG_IO_STATE_SUPPORTED
|
||||
/* Inform the I/O callback that chunk data will (possibly) be read.
|
||||
* PNG_IO_CHUNK_DATA does NOT require a specific number of I/O calls.
|
||||
/* It is unspecified how many I/O calls will be performed
|
||||
* during the serialization of the chunk data.
|
||||
*/
|
||||
png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_DATA;
|
||||
#endif
|
||||
|
|
@ -119,6 +163,7 @@ png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length)
|
|||
{
|
||||
if (png_ptr == NULL)
|
||||
return;
|
||||
|
||||
png_read_data(png_ptr, buf, length);
|
||||
png_calculate_crc(png_ptr, buf, length);
|
||||
}
|
||||
|
|
@ -138,6 +183,7 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip)
|
|||
{
|
||||
png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
|
||||
}
|
||||
|
||||
if (i)
|
||||
{
|
||||
png_crc_read(png_ptr, png_ptr->zbuf, i);
|
||||
|
|
@ -152,11 +198,13 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip)
|
|||
{
|
||||
png_chunk_warning(png_ptr, "CRC error");
|
||||
}
|
||||
|
||||
else
|
||||
{
|
||||
png_chunk_benign_error(png_ptr, "CRC error");
|
||||
return (0);
|
||||
}
|
||||
|
||||
return (1);
|
||||
}
|
||||
|
||||
|
|
@ -179,6 +227,7 @@ png_crc_error(png_structp png_ptr)
|
|||
(PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
|
||||
need_crc = 0;
|
||||
}
|
||||
|
||||
else /* critical */
|
||||
{
|
||||
if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
|
||||
|
|
@ -186,11 +235,10 @@ png_crc_error(png_structp png_ptr)
|
|||
}
|
||||
|
||||
#ifdef PNG_IO_STATE_SUPPORTED
|
||||
/* Inform the I/O callback that the chunk CRC is being read */
|
||||
/* PNG_IO_CHUNK_CRC requires the I/O to be done at once */
|
||||
png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_CRC;
|
||||
#endif
|
||||
|
||||
/* The chunk CRC must be serialized in a single I/O call. */
|
||||
png_read_data(png_ptr, crc_bytes, 4);
|
||||
|
||||
if (need_crc)
|
||||
|
|
@ -198,6 +246,7 @@ png_crc_error(png_structp png_ptr)
|
|||
crc = png_get_uint_32(crc_bytes);
|
||||
return ((int)(crc != png_ptr->crc));
|
||||
}
|
||||
|
||||
else
|
||||
return (0);
|
||||
}
|
||||
|
|
@ -237,6 +286,7 @@ png_inflate(png_structp png_ptr, const png_byte *data, png_size_t size,
|
|||
if (avail < copy) copy = avail;
|
||||
png_memcpy(output + count, png_ptr->zbuf, copy);
|
||||
}
|
||||
|
||||
count += avail;
|
||||
}
|
||||
|
||||
|
|
@ -270,9 +320,11 @@ png_inflate(png_structp png_ptr, const png_byte *data, png_size_t size,
|
|||
case Z_BUF_ERROR:
|
||||
msg = "Buffer error in compressed datastream in %s chunk";
|
||||
break;
|
||||
|
||||
case Z_DATA_ERROR:
|
||||
msg = "Data error in compressed datastream in %s chunk";
|
||||
break;
|
||||
|
||||
default:
|
||||
msg = "Incomplete compressed datastream in %s chunk";
|
||||
break;
|
||||
|
|
@ -372,6 +424,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
|
|||
png_warning(png_ptr, "png_inflate logic error");
|
||||
png_free(png_ptr, text);
|
||||
}
|
||||
|
||||
else
|
||||
png_warning(png_ptr, "Not enough memory to decompress chunk");
|
||||
}
|
||||
|
|
@ -3109,17 +3162,10 @@ png_read_finish_row(png_structp png_ptr)
|
|||
{
|
||||
while (!png_ptr->idat_size)
|
||||
{
|
||||
png_byte chunk_length[4];
|
||||
|
||||
png_crc_finish(png_ptr, 0);
|
||||
|
||||
png_read_data(png_ptr, chunk_length, 4);
|
||||
png_ptr->idat_size = png_get_uint_31(png_ptr, chunk_length);
|
||||
png_reset_crc(png_ptr);
|
||||
png_crc_read(png_ptr, png_ptr->chunk_name, 4);
|
||||
png_ptr->idat_size = png_read_chunk_header(png_ptr);
|
||||
if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
|
||||
png_error(png_ptr, "Not enough image data");
|
||||
|
||||
}
|
||||
png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size;
|
||||
png_ptr->zstream.next_in = png_ptr->zbuf;
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngset.c - storage of image information into info struct
|
||||
*
|
||||
* Last changed in libpng 1.4.1 [February 25, 2010]
|
||||
* Last changed in libpng 1.4.5 [December 9, 2010]
|
||||
* Copyright (c) 1998-2010 Glenn Randers-Pehrson
|
||||
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
|
||||
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
|
||||
|
|
@ -690,6 +690,13 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
|
|||
if (text_ptr[i].key == NULL)
|
||||
continue;
|
||||
|
||||
if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||
|
||||
text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)
|
||||
{
|
||||
png_warning(png_ptr, "text compression mode is out of range");
|
||||
continue;
|
||||
}
|
||||
|
||||
key_len = png_strlen(text_ptr[i].key);
|
||||
|
||||
if (text_ptr[i].compression <= 0)
|
||||
|
|
@ -1004,7 +1011,7 @@ png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
|
|||
|
||||
#ifdef PNG_MNG_FEATURES_SUPPORTED
|
||||
png_uint_32 PNGAPI
|
||||
png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
|
||||
png_permit_mng_features(png_structp png_ptr, png_uint_32 mng_features)
|
||||
{
|
||||
png_debug(1, "in png_permit_mng_features");
|
||||
|
||||
|
|
@ -1118,7 +1125,7 @@ png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
|
|||
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
|
||||
/* This function was added to libpng 1.2.6 */
|
||||
void PNGAPI
|
||||
png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
|
||||
png_set_user_limits(png_structp png_ptr, png_uint_32 user_width_max,
|
||||
png_uint_32 user_height_max)
|
||||
{
|
||||
/* Images with dimensions larger than these limits will be
|
||||
|
|
@ -1133,7 +1140,7 @@ png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
|
|||
|
||||
/* This function was added to libpng 1.4.0 */
|
||||
void PNGAPI
|
||||
png_set_chunk_cache_max (png_structp png_ptr,
|
||||
png_set_chunk_cache_max(png_structp png_ptr,
|
||||
png_uint_32 user_chunk_cache_max)
|
||||
{
|
||||
if (png_ptr)
|
||||
|
|
@ -1142,7 +1149,7 @@ png_set_chunk_cache_max (png_structp png_ptr,
|
|||
|
||||
/* This function was added to libpng 1.4.1 */
|
||||
void PNGAPI
|
||||
png_set_chunk_malloc_max (png_structp png_ptr,
|
||||
png_set_chunk_malloc_max(png_structp png_ptr,
|
||||
png_alloc_size_t user_chunk_malloc_max)
|
||||
{
|
||||
if (png_ptr)
|
||||
|
|
|
|||
|
|
@ -195,6 +195,9 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
|
|||
*dp = (png_byte)v;
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
row_info->bit_depth = (png_byte)bit_depth;
|
||||
row_info->pixel_depth = (png_byte)(bit_depth * row_info->channels);
|
||||
|
|
|
|||
|
|
@ -246,10 +246,12 @@ png_text_compress(png_structp png_ptr,
|
|||
*/
|
||||
|
||||
/* Set up the compression buffers */
|
||||
/* TODO: the following cast hides a potential overflow problem. */
|
||||
png_ptr->zstream.avail_in = (uInt)text_len;
|
||||
/* NOTE: assume zlib doesn't overwrite the input */
|
||||
png_ptr->zstream.next_in = (Bytef *)text;
|
||||
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
|
||||
png_ptr->zstream.next_out = (Bytef *)png_ptr->zbuf;
|
||||
png_ptr->zstream.avail_out = png_ptr->zbuf_size;
|
||||
png_ptr->zstream.next_out = png_ptr->zbuf;
|
||||
|
||||
/* This is the same compression loop as in png_write_row() */
|
||||
do
|
||||
|
|
|
|||
Loading…
Reference in a new issue