diff options
| author | Glenn Randers-Pehrson <glennrp at users.sourceforge.net> | 2014-02-07 14:44:34 -0600 |
|---|---|---|
| committer | Glenn Randers-Pehrson <glennrp at users.sourceforge.net> | 2014-02-07 15:04:48 -0600 |
| commit | a670950212697821f2cd79d619871ad0ec8cc8ea (patch) | |
| tree | e4add3127fda2ab737c47a909c116af667902376 | |
| parent | 8b1263b201b8676d8d72bb90961b568380340970 (diff) | |
| download | libpng-1.7.71.tar.gz | |
[pngcrush] Update bundled libpng to version 1.6.9v1.7.71
| -rw-r--r-- | ChangeLog.html | 9 | ||||
| -rw-r--r-- | png.c | 79 | ||||
| -rw-r--r-- | png.h | 23 | ||||
| -rw-r--r-- | pngconf.h | 37 | ||||
| -rw-r--r-- | pngcrush.c | 26 | ||||
| -rw-r--r-- | pngcrush.h | 2 | ||||
| -rw-r--r-- | pngerror.c | 7 | ||||
| -rw-r--r-- | pnglibconf.h | 4 | ||||
| -rw-r--r-- | pngpriv.h | 120 | ||||
| -rw-r--r-- | pngread.c | 83 | ||||
| -rw-r--r-- | pngrio.c | 6 | ||||
| -rw-r--r-- | pngrtran.c | 724 | ||||
| -rw-r--r-- | pngtrans.c | 8 | ||||
| -rw-r--r-- | pngwio.c | 6 | ||||
| -rw-r--r-- | pngwrite.c | 69 | ||||
| -rw-r--r-- | pngwtran.c | 203 |
16 files changed, 667 insertions, 739 deletions
diff --git a/ChangeLog.html b/ChangeLog.html index 3b70dc968..4aaf25c6e 100644 --- a/ChangeLog.html +++ b/ChangeLog.html @@ -3,7 +3,16 @@ Change log: +Version 1.7.71 (built with libpng-1.6.9 and zlib-1.2.8) + Built the Windows binaries using -DTOO_FAR=32767; neglected to do this + in versions 1.7.42 through 1.7.70, which caused the Windows binaries + to produce different (usually a few bytes larger) results than Linux. + Thanks to F. Kayser for reporting the discrepancy. + +Version 1.7.70 (built with libpng-1.6.8 and zlib-1.2.8) + Version 1.7.69 (built with libpng-1.6.6 and zlib-1.2.8) + Updated libpng to version 1.6.6. Version 1.7.68 (built with libpng-1.6.4 and zlib-1.2.8) Check for NULL return from malloc(). @@ -1,8 +1,8 @@ /* png.c - location for general purpose libpng functions * - * Last changed in libpng 1.6.8 [December 19, 2013] - * Copyright (c) 1998-2013 Glenn Randers-Pehrson + * Last changed in libpng 1.6.9 [February 6, 2014] + * Copyright (c) 1998-2014 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.) * @@ -14,7 +14,7 @@ #include "pngpriv.h" /* Generate a compiler error if there is an old png.h in the search path. */ -typedef png_libpng_version_1_6_8 Your_png_h_is_not_version_1_6_8; +typedef png_libpng_version_1_6_9 Your_png_h_is_not_version_1_6_9; /* Tells libpng that we have already handled the first "num_bytes" bytes * of the PNG file signature. If the PNG data is embedded into another @@ -773,14 +773,14 @@ png_get_copyright(png_const_structrp png_ptr) #else # ifdef __STDC__ return PNG_STRING_NEWLINE \ - "libpng version 1.6.8 - December 19, 2013" PNG_STRING_NEWLINE \ - "Copyright (c) 1998-2013 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ + "libpng version 1.6.9 - February 6, 2014" PNG_STRING_NEWLINE \ + "Copyright (c) 1998-2014 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ PNG_STRING_NEWLINE; # else - return "libpng version 1.6.8 - December 19, 2013\ - Copyright (c) 1998-2013 Glenn Randers-Pehrson\ + return "libpng version 1.6.9 - February 6, 2014\ + Copyright (c) 1998-2014 Glenn Randers-Pehrson\ Copyright (c) 1996-1997 Andreas Dilger\ Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."; # endif @@ -826,6 +826,63 @@ png_get_header_version(png_const_structrp png_ptr) #endif } +#ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED +/* NOTE: this routine is not used internally! */ +/* Build a grayscale palette. Palette is assumed to be 1 << bit_depth + * large of png_color. This lets grayscale images be treated as + * paletted. Most useful for gamma correction and simplification + * of code. This API is not used internally. + */ +void PNGAPI +png_build_grayscale_palette(int bit_depth, png_colorp palette) +{ + int num_palette; + int color_inc; + int i; + int v; + + png_debug(1, "in png_do_build_grayscale_palette"); + + if (palette == NULL) + return; + + switch (bit_depth) + { + case 1: + num_palette = 2; + color_inc = 0xff; + break; + + case 2: + num_palette = 4; + color_inc = 0x55; + break; + + case 4: + num_palette = 16; + color_inc = 0x11; + break; + + case 8: + num_palette = 256; + color_inc = 1; + break; + + default: + num_palette = 0; + color_inc = 0; + break; + } + + for (i = 0, v = 0; i < num_palette; i++, v += color_inc) + { + palette[i].red = (png_byte)v; + palette[i].green = (png_byte)v; + palette[i].blue = (png_byte)v; + } +} +#endif + #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED int PNGAPI png_handle_as_unknown(png_const_structrp png_ptr, png_const_bytep chunk_name) @@ -2416,14 +2473,6 @@ png_check_IHDR(png_const_structrp png_ptr, error = 1; } - if (width > (PNG_UINT_32_MAX - >> 3) /* 8-byte RGBA pixels */ - - 48 /* bigrowbuf hack */ - - 1 /* filter byte */ - - 7*8 /* rounding of width to multiple of 8 pixels */ - - 8) /* extra max_pixel_depth pad */ - png_warning(png_ptr, "Width is too large for libpng to process pixels"); - /* Check other values */ if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && bit_depth != 8 && bit_depth != 16) @@ -1,7 +1,7 @@ /* png.h - header file for PNG reference library * - * libpng version 1.6.8 - December 19, 2013 + * libpng version 1.6.9 - February 6, 2014 * Copyright (c) 1998-2013 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.) @@ -11,7 +11,7 @@ * Authors and maintainers: * 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 0.97, January 1998, through 1.6.8 - December 19, 2013: Glenn + * libpng versions 0.97, January 1998, through 1.6.9 - February 6, 2014: Glenn * See also "Contributing Authors", below. * * Note about libpng version numbers: @@ -189,6 +189,9 @@ * 1.6.8beta01-02 16 10608 16.so.16.8[.0] * 1.6.8rc01-02 16 10608 16.so.16.8[.0] * 1.6.8 16 10608 16.so.16.8[.0] + * 1.6.9beta01-04 16 10609 16.so.16.9[.0] + * 1.6.9rc01-02 16 10609 16.so.16.9[.0] + * 1.6.9 16 10609 16.so.16.9[.0] * * Henceforth the source version will match the shared-library major * and minor numbers; the shared-library major version number will be @@ -220,7 +223,7 @@ * * This code is released under the libpng license. * - * libpng versions 1.2.6, August 15, 2004, through 1.6.8, December 19, 2013, are + * libpng versions 1.2.6, August 15, 2004, through 1.6.9, February 6, 2014, are * Copyright (c) 2004, 2006-2013 Glenn Randers-Pehrson, and are * distributed according to the same disclaimer and license as libpng-1.2.5 * with the following individual added to the list of Contributing Authors: @@ -332,13 +335,13 @@ * Y2K compliance in libpng: * ========================= * - * December 19, 2013 + * February 6, 2014 * * Since the PNG Development group is an ad-hoc body, we can't make * an official declaration. * * This is your unofficial assurance that libpng from version 0.71 and - * upward through 1.6.8 are Y2K compliant. It is my belief that + * upward through 1.6.9 are Y2K compliant. It is my belief that * earlier versions were also Y2K compliant. * * Libpng only has two year fields. One is a 2-byte unsigned integer @@ -398,9 +401,9 @@ */ /* Version information for png.h - this should match the version in png.c */ -#define PNG_LIBPNG_VER_STRING "1.6.8" +#define PNG_LIBPNG_VER_STRING "1.6.9" #define PNG_HEADER_VERSION_STRING \ - " libpng version 1.6.8 - December 19, 2013\n" + " libpng version 1.6.9 - February 6, 2014\n" #define PNG_LIBPNG_VER_SONUM 16 #define PNG_LIBPNG_VER_DLLNUM 16 @@ -408,7 +411,7 @@ /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */ #define PNG_LIBPNG_VER_MAJOR 1 #define PNG_LIBPNG_VER_MINOR 6 -#define PNG_LIBPNG_VER_RELEASE 8 +#define PNG_LIBPNG_VER_RELEASE 9 /* This should match the numeric part of the final component of * PNG_LIBPNG_VER_STRING, omitting any leading zero: @@ -439,7 +442,7 @@ * version 1.0.0 was mis-numbered 100 instead of 10000). From * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release */ -#define PNG_LIBPNG_VER 10608 /* 1.6.8 */ +#define PNG_LIBPNG_VER 10609 /* 1.6.9 */ /* Library configuration: these options cannot be changed after * the library has been built. @@ -544,7 +547,7 @@ extern "C" { /* This triggers a compiler error in png.c, if png.c and png.h * do not agree upon the version number. */ -typedef char* png_libpng_version_1_6_8; +typedef char* png_libpng_version_1_6_9; /* Basic control structions. Read libpng-manual.txt or libpng.3 for more info. * @@ -1,7 +1,7 @@ /* pngconf.h - machine configurable file for libpng * - * libpng version 1.6.8 - December 19, 2013 + * libpng version 1.6.9 - February 6, 2014 * * Copyright (c) 1998-2013 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) @@ -366,7 +366,31 @@ * version 1.2.41. Disabling these removes the warnings but may also produce * less efficient code. */ -# if defined(__GNUC__) +# if defined(__clang__) + /* Clang defines both __clang__ and __GNUC__. Check __clang__ first. */ +# if !defined(PNG_USE_RESULT) && __has_attribute(__warn_unused_result__) +# define PNG_USE_RESULT __attribute__((__warn_unused_result__)) +# endif +# if !defined(PNG_NORETURN) && __has_attribute(__noreturn__) +# define PNG_NORETURN __attribute__((__noreturn__)) +# endif +# if !defined(PNG_ALLOCATED) && __has_attribute(__malloc__) +# define PNG_ALLOCATED __attribute__((__malloc__)) +# endif +# if !defined(PNG_DEPRECATED) && __has_attribute(__deprecated__) +# define PNG_DEPRECATED __attribute__((__deprecated__)) +# endif +# if !defined(PNG_PRIVATE) +# if __has_extension(attribute_unavailable_with_message) +# define PNG_PRIVATE __attribute__((__unavailable__(\ + "This function is not exported by libpng."))) +# endif +# endif +# ifndef PNG_RESTRICT +# define PNG_RESTRICT __restrict +# endif + +# elif defined(__GNUC__) # ifndef PNG_USE_RESULT # define PNG_USE_RESULT __attribute__((__warn_unused_result__)) # endif @@ -389,12 +413,12 @@ __attribute__((__deprecated__)) # endif # endif -# if ((__GNUC__ != 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1)) +# if ((__GNUC__ > 3) || !defined(__GNUC_MINOR__) || (__GNUC_MINOR__ >= 1)) # ifndef PNG_RESTRICT # define PNG_RESTRICT __restrict # endif -# endif /* __GNUC__ == 3.0 */ -# endif /* __GNUC__ >= 3 */ +# endif /* __GNUC__.__GNUC_MINOR__ > 3.0 */ +# endif /* __GNUC__ >= 3 */ # elif defined(_MSC_VER) && (_MSC_VER >= 1300) # ifndef PNG_USE_RESULT @@ -424,7 +448,7 @@ # ifndef PNG_RESTRICT # define PNG_RESTRICT __restrict # endif -# endif /* _MSC_VER */ +# endif #endif /* PNG_PEDANTIC_WARNINGS */ #ifndef PNG_DEPRECATED @@ -445,6 +469,7 @@ #ifndef PNG_RESTRICT # define PNG_RESTRICT /* The C99 "restrict" feature */ #endif + #ifndef PNG_FP_EXPORT /* A floating point API. */ # ifdef PNG_FLOATING_POINT_SUPPORTED # define PNG_FP_EXPORT(ordinal, type, name, args)\ diff --git a/pngcrush.c b/pngcrush.c index 1a3ff5dc0..743e1f7c6 100644 --- a/pngcrush.c +++ b/pngcrush.c @@ -1,6 +1,6 @@ /* * pngcrush.c - recompresses png files - * Copyright (C) 1998-2002, 2006-2013 Glenn Randers-Pehrson + * Copyright (C) 1998-2002, 2006-2014 Glenn Randers-Pehrson * (glennrp at users.sf.net) * Portions copyright (C) 2005 Greg Roelofs * @@ -80,7 +80,7 @@ * */ -#define PNGCRUSH_VERSION "1.7.70" +#define PNGCRUSH_VERSION "1.7.71" /* Experimental: define these if you wish, but, good luck. #define PNGCRUSH_COUNT_COLORS @@ -101,7 +101,7 @@ * * COPYRIGHT: * - * Copyright (C) 1998-2002, 2006-2013 Glenn Randers-Pehrson + * Copyright (C) 1998-2002, 2006-2014 Glenn Randers-Pehrson * (glennrp at users.sf.net) * Portions copyright (C) 2005 Greg Roelofs * @@ -308,6 +308,12 @@ Change log: +Version 1.7.71 (built with libpng-1.6.9 and zlib-1.2.8) + Built the Windows binaries using -DTOO_FAR=32767; neglected to do this + in versions 1.7.42 through 1.7.70, which caused the Windows binaries + to produce different (usually a few bytes larger) results than Linux. + Thanks to F. Kayser for reporting the discrepancy. + Version 1.7.70 (built with libpng-1.6.8 and zlib-1.2.8) Version 1.7.69 (built with libpng-1.6.6 and zlib-1.2.8) @@ -7097,8 +7103,8 @@ int main(int argc, char *argv[]) png_uint_32 measure_idats(FILE * fp_in) { - /* Copyright (C) 1999-2002, 2006-2013 Glenn Randers-Pehrson - (glennrp@users.sf.net). See notice in pngcrush.c for conditions of + /* Copyright (C) 1999-2002, 2006-2014 Glenn Randers-Pehrson + (glennrp at users.sf.net). See notice in pngcrush.c for conditions of use and distribution */ P2("\nmeasure_idats:\n"); P1( "Allocating read structure\n"); @@ -7141,8 +7147,8 @@ png_uint_32 measure_idats(FILE * fp_in) png_uint_32 pngcrush_measure_idat(png_structp png_ptr) { - /* Copyright (C) 1999-2002, 2006-2013 Glenn Randers-Pehrson - (glennrp@users.sf.net) + /* Copyright (C) 1999-2002, 2006-2014 Glenn Randers-Pehrson + (glennrp at users.sf.net) See notice in pngcrush.c for conditions of use and distribution */ /* Signature + IHDR + IEND; we'll add PLTE + IDAT lengths */ @@ -7636,7 +7642,7 @@ void print_version_info(void) " | pngcrush %s\n" /* If you have modified this source, you may insert additional notices * immediately after this sentence: */ - " | Copyright (C) 1998-2002, 2006-2013 Glenn Randers-Pehrson\n" + " | Copyright (C) 1998-2002, 2006-2014 Glenn Randers-Pehrson\n" " | Portions copyright (C) 2005 Greg Roelofs\n" " | This is a free, open-source program. Permission is irrevocably\n" " | granted to everyone to use this version of pngcrush without\n" @@ -7644,7 +7650,7 @@ void print_version_info(void) " | Executable name is %s\n" " | It was built with libpng version %s, and is\n" " | running with %s" - " | Copyright (C) 1998-2004, 2006-2013 Glenn Randers-Pehrson,\n" + " | Copyright (C) 1998-2004, 2006-2014 Glenn Randers-Pehrson,\n" " | Copyright (C) 1996, 1997 Andreas Dilger,\n" " | Copyright (C) 1995, Guy Eric Schalnat, Group 42 Inc.,\n" " | and zlib version %s, Copyright (C) 1995%s,\n" @@ -7682,7 +7688,7 @@ static const char *pngcrush_legal[] = { "", "If you have modified this source, you may insert additional notices", "immediately after this sentence.", - "Copyright (C) 1998-2002, 2006-2013 Glenn Randers-Pehrson", + "Copyright (C) 1998-2002, 2006-2014 Glenn Randers-Pehrson", "Portions copyright (C) 2005 Greg Roelofs", "", "DISCLAIMER: The pngcrush computer program is supplied \"AS IS\".", diff --git a/pngcrush.h b/pngcrush.h index 80cc11418..772d1d961 100644 --- a/pngcrush.h +++ b/pngcrush.h @@ -5,7 +5,7 @@ * license (see LICENSE, in pngcrush.c). */ -/* Special defines for pngcrush version 1.7.70 */ +/* Special defines for pngcrush version 1.7.71 */ #ifndef PNGCRUSH_H #define PNGCRUSH_H diff --git a/pngerror.c b/pngerror.c index b46d28f19..3faf27319 100644 --- a/pngerror.c +++ b/pngerror.c @@ -761,7 +761,12 @@ png_longjmp,(png_const_structrp png_ptr, int val),PNG_NORETURN) png_ptr->longjmp_fn(*png_ptr->jmp_buf_ptr, val); #endif - /* Here if not setjmp support or if png_ptr is null. */ + /* If control reaches this point, png_longjmp() must not return. The only + * choice is to terminate the whole process (or maybe the thread); to do + * this the ANSI-C abort() function is used unless a different method is + * implemented by overriding the default configuration setting for + * PNG_ABORT(). + */ PNG_ABORT(); } diff --git a/pnglibconf.h b/pnglibconf.h index cb0f133c4..8ad56dbb5 100644 --- a/pnglibconf.h +++ b/pnglibconf.h @@ -1,8 +1,8 @@ -/* libpng 1.6.8 STANDARD API DEFINITION */ +/* libpng 1.6.9 STANDARD API DEFINITION */ /* pnglibconf.h - library build configuration */ -/* Libpng version 1.6.8 - December 19, 2013 */ +/* Libpng version 1.6.9 - February 6, 2014 */ /* Copyright (c) 1998-2013 Glenn Randers-Pehrson */ @@ -2,11 +2,11 @@ /* pngpriv.h - private declarations for use inside libpng * * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2013 Glenn Randers-Pehrson + * Copyright (c) 1998-2014 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.) * - * Last changed in libpng 1.6.8 [December 19, 2013] + * Last changed in libpng 1.6.9 [February 6, 2014] * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer @@ -135,7 +135,7 @@ /* By default the 'intrinsics' code in arm/filter_neon_intrinsics.c is used * if possible - if __ARM_NEON__ is set and the compiler version is not known - * to be broken. This is control by PNG_ARM_NEON_IMPLEMENTATION which can + * to be broken. This is controlled by PNG_ARM_NEON_IMPLEMENTATION which can * be: * * 1 The intrinsics code (the default with __ARM_NEON__) @@ -1235,32 +1235,7 @@ PNG_INTERNAL_FUNCTION(void,png_read_transform_info,(png_structrp png_ptr, png_inforp info_ptr),PNG_EMPTY); #endif -/* These are the functions that do the transformations */ -#ifdef PNG_READ_FILLER_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_read_filler,(png_row_infop row_info, - png_bytep row, png_uint_32 filler, png_uint_32 flags),PNG_EMPTY); -#endif - -#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_read_swap_alpha,(png_row_infop row_info, - png_bytep row),PNG_EMPTY); -#endif - -#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_write_swap_alpha,(png_row_infop row_info, - png_bytep row),PNG_EMPTY); -#endif - -#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_read_invert_alpha,(png_row_infop row_info, - png_bytep row),PNG_EMPTY); -#endif - -#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_write_invert_alpha,(png_row_infop row_info, - png_bytep row),PNG_EMPTY); -#endif - +/* Shared transform functions, defined in pngtran.c */ #if defined(PNG_WRITE_FILLER_SUPPORTED) || \ defined(PNG_READ_STRIP_ALPHA_SUPPORTED) PNG_INTERNAL_FUNCTION(void,png_do_strip_channel,(png_row_infop row_info, @@ -1280,96 +1255,16 @@ PNG_INTERNAL_FUNCTION(void,png_do_packswap,(png_row_infop row_info, png_bytep row),PNG_EMPTY); #endif -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED -PNG_INTERNAL_FUNCTION(int,png_do_rgb_to_gray,(png_structrp png_ptr, - png_row_infop row_info, png_bytep row),PNG_EMPTY); -#endif - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_gray_to_rgb,(png_row_infop row_info, - png_bytep row),PNG_EMPTY); -#endif - -#ifdef PNG_READ_PACK_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_unpack,(png_row_infop row_info, - png_bytep row),PNG_EMPTY); -#endif - -#ifdef PNG_READ_SHIFT_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_unshift,(png_row_infop row_info, - png_bytep row, png_const_color_8p sig_bits),PNG_EMPTY); -#endif - #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) PNG_INTERNAL_FUNCTION(void,png_do_invert,(png_row_infop row_info, png_bytep row),PNG_EMPTY); #endif -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_scale_16_to_8,(png_row_infop row_info, - png_bytep row),PNG_EMPTY); -#endif - -#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_chop,(png_row_infop row_info, - png_bytep row),PNG_EMPTY); -#endif - -#ifdef PNG_READ_QUANTIZE_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_quantize,(png_row_infop row_info, - png_bytep row, png_const_bytep palette_lookup, - png_const_bytep quantize_lookup),PNG_EMPTY); - -# ifdef PNG_CORRECT_PALETTE_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_correct_palette,(png_structrp png_ptr, - png_colorp palette, int num_palette),PNG_EMPTY); -# endif -#endif - #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) PNG_INTERNAL_FUNCTION(void,png_do_bgr,(png_row_infop row_info, png_bytep row),PNG_EMPTY); #endif -#ifdef PNG_WRITE_PACK_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_pack,(png_row_infop row_info, - png_bytep row, png_uint_32 bit_depth),PNG_EMPTY); -#endif - -#ifdef PNG_WRITE_SHIFT_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_shift,(png_row_infop row_info, - png_bytep row, png_const_color_8p bit_depth),PNG_EMPTY); -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) -PNG_INTERNAL_FUNCTION(void,png_do_compose,(png_row_infop row_info, - png_bytep row, png_structrp png_ptr),PNG_EMPTY); -#endif - -#ifdef PNG_READ_GAMMA_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_gamma,(png_row_infop row_info, - png_bytep row, png_structrp png_ptr),PNG_EMPTY); -#endif - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_encode_alpha,(png_row_infop row_info, - png_bytep row, png_structrp png_ptr),PNG_EMPTY); -#endif - -#ifdef PNG_READ_EXPAND_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_expand_palette,(png_row_infop row_info, - png_bytep row, png_const_colorp palette, png_const_bytep trans, - int num_trans),PNG_EMPTY); -PNG_INTERNAL_FUNCTION(void,png_do_expand,(png_row_infop row_info, - png_bytep row, png_const_color_16p trans_color),PNG_EMPTY); -#endif - -#ifdef PNG_READ_EXPAND_16_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_expand_16,(png_row_infop row_info, - png_bytep row),PNG_EMPTY); -#endif - /* The following decodes the appropriate chunks, and does error correction, * then calls the appropriate callback for the chunk if it is valid. */ @@ -1556,13 +1451,6 @@ PNG_INTERNAL_FUNCTION(void,png_push_read_iTXt,(png_structrp png_ptr, #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ -#ifdef PNG_MNG_FEATURES_SUPPORTED -PNG_INTERNAL_FUNCTION(void,png_do_read_intrapixel,(png_row_infop row_info, - png_bytep row),PNG_EMPTY); -PNG_INTERNAL_FUNCTION(void,png_do_write_intrapixel,(png_row_infop row_info, - png_bytep row),PNG_EMPTY); -#endif - /* Added at libpng version 1.6.0 */ #ifdef PNG_GAMMA_SUPPORTED PNG_INTERNAL_FUNCTION(void,png_colorspace_set_gamma,(png_const_structrp png_ptr, @@ -1,8 +1,8 @@ /* pngread.c - read a PNG file * - * Last changed in libpng 1.6.8 [December 19, 2013] - * Copyright (c) 1998-2013 Glenn Randers-Pehrson + * Last changed in libpng 1.6.9 [February 6, 2014] + * Copyright (c) 1998-2014 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.) * @@ -305,6 +305,72 @@ png_start_read_image(png_structrp png_ptr) #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ #ifdef PNG_SEQUENTIAL_READ_SUPPORTED +#ifdef PNG_MNG_FEATURES_SUPPORTED +/* Undoes intrapixel differencing, + * NOTE: this is apparently only supported in the 'sequential' reader. + */ +static void +png_do_read_intrapixel(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_read_intrapixel"); + + if ( + (row_info->color_type & PNG_COLOR_MASK_COLOR)) + { + int bytes_per_pixel; + png_uint_32 row_width = row_info->width; + + if (row_info->bit_depth == 8) + { + png_bytep rp; + png_uint_32 i; + + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + bytes_per_pixel = 3; + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + bytes_per_pixel = 4; + + else + return; + + for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) + { + *(rp) = (png_byte)((256 + *rp + *(rp + 1)) & 0xff); + *(rp+2) = (png_byte)((256 + *(rp + 2) + *(rp + 1)) & 0xff); + } + } + else if (row_info->bit_depth == 16) + { + png_bytep rp; + png_uint_32 i; + + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + bytes_per_pixel = 6; + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + bytes_per_pixel = 8; + + else + return; + + for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) + { + png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); + png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); + png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); + png_uint_32 red = (s0 + s1 + 65536) & 0xffff; + png_uint_32 blue = (s2 + s1 + 65536) & 0xffff; + *(rp ) = (png_byte)((red >> 8) & 0xff); + *(rp + 1) = (png_byte)(red & 0xff); + *(rp + 4) = (png_byte)((blue >> 8) & 0xff); + *(rp + 5) = (png_byte)(blue & 0xff); + } + } + } +} +#endif /* PNG_MNG_FEATURES_SUPPORTED */ + void PNGAPI png_read_row(png_structrp png_ptr, png_bytep row, png_bytep dsp_row) { @@ -489,7 +555,6 @@ png_read_row(png_structrp png_ptr, png_bytep row, png_bytep dsp_row) } #endif - #ifdef PNG_READ_TRANSFORMS_SUPPORTED if (png_ptr->transformations) png_do_read_transformations(png_ptr, &row_info); @@ -1004,7 +1069,7 @@ png_read_png(png_structrp png_ptr, png_inforp info_ptr, if (transforms & PNG_TRANSFORM_EXPAND) if ((png_ptr->bit_depth < 8) || (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) || - (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))) + (info_ptr->valid & PNG_INFO_tRNS)) png_set_expand(png_ptr); #endif @@ -1023,14 +1088,8 @@ png_read_png(png_structrp png_ptr, png_inforp info_ptr, * [0,65535] to the original [0,7] or [0,31], or whatever range the * colors were originally in: */ - if ((transforms & PNG_TRANSFORM_SHIFT) - && png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT)) - { - png_color_8p sig_bit; - - png_get_sBIT(png_ptr, info_ptr, &sig_bit); - png_set_shift(png_ptr, sig_bit); - } + if ((transforms & PNG_TRANSFORM_SHIFT) && (info_ptr->valid & PNG_INFO_sBIT)) + png_set_shift(png_ptr, &info_ptr->sig_bit); #endif #ifdef PNG_READ_BGR_SUPPORTED @@ -1,8 +1,8 @@ /* pngrio.c - functions for data input * - * Last changed in libpng 1.6.0 [February 14, 2013] - * Copyright (c) 1998-2013 Glenn Randers-Pehrson + * Last changed in libpng 1.6.9 [February 6, 2014] + * Copyright (c) 1998-2014 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.) * @@ -102,6 +102,7 @@ png_set_read_fn(png_structrp png_ptr, png_voidp io_ptr, png_ptr->read_data_fn = read_data_fn; #endif +#ifdef PNG_WRITE_SUPPORTED /* It is an error to write to a read device */ if (png_ptr->write_data_fn != NULL) { @@ -110,6 +111,7 @@ png_set_read_fn(png_structrp png_ptr, png_voidp io_ptr, "Can't set both read_data_fn and write_data_fn in the" " same structure"); } +#endif #ifdef PNG_WRITE_FLUSH_SUPPORTED png_ptr->output_flush_fn = NULL; diff --git a/pngrtran.c b/pngrtran.c index d67e25d9d..f0c016478 100644 --- a/pngrtran.c +++ b/pngrtran.c @@ -1,8 +1,8 @@ /* pngrtran.c - transforms the data in a row for PNG readers * - * Last changed in libpng 1.6.8 [December 19, 2013] - * Copyright (c) 1998-2013 Glenn Randers-Pehrson + * Last changed in libpng 1.6.9 [February 6, 2014] + * Copyright (c) 1998-2014 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.) * @@ -1134,7 +1134,7 @@ png_init_palette_transformations(png_structrp png_ptr) if (!input_has_alpha) { /* Any alpha means background and associative alpha processing is - * required, however if the alpha is 0 or 1 throughout OPTIIMIZE_ALPHA + * required, however if the alpha is 0 or 1 throughout OPTIMIZE_ALPHA * and ENCODE_ALPHA are irrelevant. */ png_ptr->transformations &= ~PNG_ENCODE_ALPHA; @@ -1199,7 +1199,7 @@ png_init_rgb_transformations(png_structrp png_ptr) if (!input_has_alpha) { /* Any alpha means background and associative alpha processing is - * required, however if the alpha is 0 or 1 throughout OPTIIMIZE_ALPHA + * required, however if the alpha is 0 or 1 throughout OPTIMIZE_ALPHA * and ENCODE_ALPHA are irrelevant. */ # ifdef PNG_READ_ALPHA_MODE_SUPPORTED @@ -2123,303 +2123,6 @@ defined(PNG_READ_USER_TRANSFORM_SUPPORTED) #endif } -/* Transform the row. The order of transformations is significant, - * and is very touchy. If you add a transformation, take care to - * decide how it fits in with the other transformations here. - */ -void /* PRIVATE */ -png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info) -{ - png_debug(1, "in png_do_read_transformations"); - - if (png_ptr->row_buf == NULL) - { - /* Prior to 1.5.4 this output row/pass where the NULL pointer is, but this - * error is incredibly rare and incredibly easy to debug without this - * information. - */ - png_error(png_ptr, "NULL row buffer"); - } - - /* The following is debugging; prior to 1.5.4 the code was never compiled in; - * in 1.5.4 PNG_FLAG_DETECT_UNINITIALIZED was added and the macro - * PNG_WARN_UNINITIALIZED_ROW removed. In 1.6 the new flag is set only for - * all transformations, however in practice the ROW_INIT always gets done on - * demand, if necessary. - */ - if ((png_ptr->flags & PNG_FLAG_DETECT_UNINITIALIZED) != 0 && - !(png_ptr->flags & PNG_FLAG_ROW_INIT)) - { - /* Application has failed to call either png_read_start_image() or - * png_read_update_info() after setting transforms that expand pixels. - * This check added to libpng-1.2.19 (but not enabled until 1.5.4). - */ - png_error(png_ptr, "Uninitialized row"); - } - -#ifdef PNG_READ_EXPAND_SUPPORTED - if (png_ptr->transformations & PNG_EXPAND) - { - if (row_info->color_type == PNG_COLOR_TYPE_PALETTE) - { - png_do_expand_palette(row_info, png_ptr->row_buf + 1, - png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans); - } - - else - { - if (png_ptr->num_trans && - (png_ptr->transformations & PNG_EXPAND_tRNS)) - png_do_expand(row_info, png_ptr->row_buf + 1, - &(png_ptr->trans_color)); - - else - png_do_expand(row_info, png_ptr->row_buf + 1, - NULL); - } - } -#endif - -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED - if ((png_ptr->transformations & PNG_STRIP_ALPHA) && - !(png_ptr->transformations & PNG_COMPOSE) && - (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || - row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) - png_do_strip_channel(row_info, png_ptr->row_buf + 1, - 0 /* at_start == false, because SWAP_ALPHA happens later */); -#endif - -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - if (png_ptr->transformations & PNG_RGB_TO_GRAY) - { - int rgb_error = - png_do_rgb_to_gray(png_ptr, row_info, - png_ptr->row_buf + 1); - - if (rgb_error) - { - png_ptr->rgb_to_gray_status=1; - if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == - PNG_RGB_TO_GRAY_WARN) - png_warning(png_ptr, "png_do_rgb_to_gray found nongray pixel"); - - if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == - PNG_RGB_TO_GRAY_ERR) - png_error(png_ptr, "png_do_rgb_to_gray found nongray pixel"); - } - } -#endif - -/* From Andreas Dilger e-mail to png-implement, 26 March 1998: - * - * 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 - * pixel is transparent. You would also need to make sure that the - * transparency information is upgraded to RGB. - * - * To summarize, the current flow is: - * - Gray + simple transparency -> compare 1 or 2 gray bytes and composite - * with background "in place" if transparent, - * convert to RGB if necessary - * - Gray + alpha -> composite with gray background and remove alpha bytes, - * convert to RGB if necessary - * - * To support RGB backgrounds for gray images we need: - * - Gray + simple transparency -> convert to RGB + simple transparency, - * compare 3 or 6 bytes and composite with - * background "in place" if transparent - * (3x compare/pixel compared to doing - * composite with gray bkgrnd) - * - Gray + alpha -> convert to RGB + alpha, composite with background and - * remove alpha bytes (3x float - * operations/pixel compared with composite - * on gray background) - * - * Greg's change will do this. The reason it wasn't done before is for - * performance, as this increases the per-pixel operations. If we would check - * in advance if the background was gray or RGB, and position the gray-to-RGB - * transform appropriately, then it would save a lot of work/time. - */ - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - /* If gray -> RGB, do so now only if background is non-gray; else do later - * for performance reasons - */ - if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && - !(png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) - png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) - if (png_ptr->transformations & PNG_COMPOSE) - png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr); -#endif - -#ifdef PNG_READ_GAMMA_SUPPORTED - if ((png_ptr->transformations & PNG_GAMMA) && -#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED - /* Because RGB_TO_GRAY does the gamma transform. */ - !(png_ptr->transformations & PNG_RGB_TO_GRAY) && -#endif -#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ - defined(PNG_READ_ALPHA_MODE_SUPPORTED) - /* Because PNG_COMPOSE does the gamma transform if there is something to - * do (if there is an alpha channel or transparency.) - */ - !((png_ptr->transformations & PNG_COMPOSE) && - ((png_ptr->num_trans != 0) || - (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) && -#endif - /* Because png_init_read_transformations transforms the palette, unless - * RGB_TO_GRAY will do the transform. - */ - (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)) - png_do_gamma(row_info, png_ptr->row_buf + 1, png_ptr); -#endif - -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED - if ((png_ptr->transformations & PNG_STRIP_ALPHA) && - (png_ptr->transformations & PNG_COMPOSE) && - (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || - row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) - png_do_strip_channel(row_info, png_ptr->row_buf + 1, - 0 /* at_start == false, because SWAP_ALPHA happens later */); -#endif - -#ifdef PNG_READ_ALPHA_MODE_SUPPORTED - if ((png_ptr->transformations & PNG_ENCODE_ALPHA) && - (row_info->color_type & PNG_COLOR_MASK_ALPHA)) - png_do_encode_alpha(row_info, png_ptr->row_buf + 1, png_ptr); -#endif - -#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED - if (png_ptr->transformations & PNG_SCALE_16_TO_8) - png_do_scale_16_to_8(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED - /* There is no harm in doing both of these because only one has any effect, - * by putting the 'scale' option first if the app asks for scale (either by - * calling the API or in a TRANSFORM flag) this is what happens. - */ - if (png_ptr->transformations & PNG_16_TO_8) - png_do_chop(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_QUANTIZE_SUPPORTED - if (png_ptr->transformations & PNG_QUANTIZE) - { - png_do_quantize(row_info, png_ptr->row_buf + 1, - png_ptr->palette_lookup, png_ptr->quantize_index); - - if (row_info->rowbytes == 0) - png_error(png_ptr, "png_do_quantize returned rowbytes=0"); - } -#endif /* PNG_READ_QUANTIZE_SUPPORTED */ - -#ifdef PNG_READ_EXPAND_16_SUPPORTED - /* Do the expansion now, after all the arithmetic has been done. Notice - * that previous transformations can handle the PNG_EXPAND_16 flag if this - * is efficient (particularly true in the case of gamma correction, where - * better accuracy results faster!) - */ - if (png_ptr->transformations & PNG_EXPAND_16) - png_do_expand_16(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED - /* NOTE: moved here in 1.5.4 (from much later in this list.) */ - if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && - (png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) - png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_INVERT_SUPPORTED - if (png_ptr->transformations & PNG_INVERT_MONO) - png_do_invert(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_SHIFT_SUPPORTED - if (png_ptr->transformations & PNG_SHIFT) - png_do_unshift(row_info, png_ptr->row_buf + 1, - &(png_ptr->shift)); -#endif - -#ifdef PNG_READ_PACK_SUPPORTED - if (png_ptr->transformations & PNG_PACK) - png_do_unpack(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED - /* Added at libpng-1.5.10 */ - if (row_info->color_type == PNG_COLOR_TYPE_PALETTE && - png_ptr->num_palette_max >= 0) - png_do_check_palette_indexes(png_ptr, row_info); -#endif - -#ifdef PNG_READ_BGR_SUPPORTED - if (png_ptr->transformations & PNG_BGR) - png_do_bgr(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_PACKSWAP_SUPPORTED - if (png_ptr->transformations & PNG_PACKSWAP) - png_do_packswap(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_FILLER_SUPPORTED - if (png_ptr->transformations & PNG_FILLER) - png_do_read_filler(row_info, png_ptr->row_buf + 1, - (png_uint_32)png_ptr->filler, png_ptr->flags); -#endif - -#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED - if (png_ptr->transformations & PNG_INVERT_ALPHA) - png_do_read_invert_alpha(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED - if (png_ptr->transformations & PNG_SWAP_ALPHA) - png_do_read_swap_alpha(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_READ_16BIT_SUPPORTED -#ifdef PNG_READ_SWAP_SUPPORTED - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_do_swap(row_info, png_ptr->row_buf + 1); -#endif -#endif - -#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED - if (png_ptr->transformations & PNG_USER_TRANSFORM) - { - if (png_ptr->read_user_transform_fn != NULL) - (*(png_ptr->read_user_transform_fn)) /* User read transform function */ - (png_ptr, /* png_ptr */ - row_info, /* row_info: */ - /* png_uint_32 width; width of row */ - /* png_size_t rowbytes; number of bytes in row */ - /* png_byte color_type; color type of pixels */ - /* png_byte bit_depth; bit depth of samples */ - /* png_byte channels; number of channels (1-4) */ - /* png_byte pixel_depth; bits per pixel (depth*channels) */ - png_ptr->row_buf + 1); /* start of pixel data for row */ -#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED - if (png_ptr->user_transform_depth) - row_info->bit_depth = png_ptr->user_transform_depth; - - if (png_ptr->user_transform_channels) - row_info->channels = png_ptr->user_transform_channels; -#endif - row_info->pixel_depth = (png_byte)(row_info->bit_depth * - row_info->channels); - - row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_info->width); - } -#endif -} - #ifdef PNG_READ_PACK_SUPPORTED /* Unpack pixels of 1, 2, or 4 bits per pixel into 1 byte per pixel, * without changing the actual values. Thus, if you had a row with @@ -2427,7 +2130,7 @@ png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info) * the numbers 0 or 1. If you would rather they contain 0 and 255, use * png_do_shift() after this. */ -void /* PRIVATE */ +static void png_do_unpack(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_unpack"); @@ -2525,7 +2228,7 @@ png_do_unpack(png_row_infop row_info, png_bytep row) * a row of bit depth 8, but only 5 are significant, this will shift * the values back to 0 through 31. */ -void /* PRIVATE */ +static void png_do_unshift(png_row_infop row_info, png_bytep row, png_const_color_8p sig_bits) { @@ -2664,7 +2367,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row, #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED /* Scale rows of bit depth 16 down to 8 accurately */ -void /* PRIVATE */ +static void png_do_scale_16_to_8(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_scale_16_to_8"); @@ -2722,7 +2425,7 @@ png_do_scale_16_to_8(png_row_infop row_info, png_bytep row) #endif #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED -void /* PRIVATE */ +static void /* Simply discard the low byte. This was the default behavior prior * to libpng-1.5.4. */ @@ -2750,7 +2453,7 @@ png_do_chop(png_row_infop row_info, png_bytep row) #endif #ifdef PNG_READ_SWAP_ALPHA_SUPPORTED -void /* PRIVATE */ +static void png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_read_swap_alpha"); @@ -2847,7 +2550,7 @@ png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) #endif #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED -void /* PRIVATE */ +static void png_do_read_invert_alpha(png_row_infop row_info, png_bytep row) { png_uint_32 row_width; @@ -2949,7 +2652,7 @@ png_do_read_invert_alpha(png_row_infop row_info, png_bytep row) #ifdef PNG_READ_FILLER_SUPPORTED /* Add filler channel if we have RGB color */ -void /* PRIVATE */ +static void png_do_read_filler(png_row_infop row_info, png_bytep row, png_uint_32 filler, png_uint_32 flags) { @@ -3136,7 +2839,7 @@ png_do_read_filler(png_row_infop row_info, png_bytep row, #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED /* Expand grayscale files to RGB, with or without alpha */ -void /* PRIVATE */ +static void png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) { png_uint_32 i; @@ -3275,7 +2978,7 @@ png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) * calculated to make the sum 32768. This will result in different rounding * to that used above. */ -int /* PRIVATE */ +static int png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row) { @@ -3469,73 +3172,14 @@ png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row) return rgb_error; } #endif -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ - -#ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED -/* Build a grayscale palette. Palette is assumed to be 1 << bit_depth - * large of png_color. This lets grayscale images be treated as - * paletted. Most useful for gamma correction and simplification - * of code. This API is not used internally. - */ -void PNGAPI -png_build_grayscale_palette(int bit_depth, png_colorp palette) -{ - int num_palette; - int color_inc; - int i; - int v; - - png_debug(1, "in png_do_build_grayscale_palette"); - - if (palette == NULL) - return; - - switch (bit_depth) - { - case 1: - num_palette = 2; - color_inc = 0xff; - break; - - case 2: - num_palette = 4; - color_inc = 0x55; - break; - - case 4: - num_palette = 16; - color_inc = 0x11; - break; - - case 8: - num_palette = 256; - color_inc = 1; - break; - - default: - num_palette = 0; - color_inc = 0; - break; - } - - for (i = 0, v = 0; i < num_palette; i++, v += color_inc) - { - palette[i].red = (png_byte)v; - palette[i].green = (png_byte)v; - palette[i].blue = (png_byte)v; - } -} -#endif - -#ifdef PNG_READ_TRANSFORMS_SUPPORTED #if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ defined(PNG_READ_ALPHA_MODE_SUPPORTED) /* Replace any alpha or transparency with the supplied background color. * "background" is already in the screen gamma, while "background_1" is * at a gamma of 1.0. Paletted files have already been taken care of. */ -void /* PRIVATE */ +static void png_do_compose(png_row_infop row_info, png_bytep row, png_structrp png_ptr) { #ifdef PNG_READ_GAMMA_SUPPORTED @@ -4275,7 +3919,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structrp png_ptr) * is 16, use gamma_16_table and gamma_shift. Build these with * build_gamma_table(). */ -void /* PRIVATE */ +static void png_do_gamma(png_row_infop row_info, png_bytep row, png_structrp png_ptr) { png_const_bytep gamma_table = png_ptr->gamma_table; @@ -4476,7 +4120,7 @@ png_do_gamma(png_row_infop row_info, png_bytep row, png_structrp png_ptr) * linear.) Called only with color types that have an alpha channel. Needs the * from_1 tables. */ -void /* PRIVATE */ +static void png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structrp png_ptr) { png_uint_32 row_width = row_info->width; @@ -4542,7 +4186,7 @@ png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structrp png_ptr) /* Expands a palette row to an RGB or RGBA row depending * upon whether you supply trans and num_trans. */ -void /* PRIVATE */ +static void png_do_expand_palette(png_row_infop row_info, png_bytep row, png_const_colorp palette, png_const_bytep trans_alpha, int num_trans) { @@ -4695,7 +4339,7 @@ png_do_expand_palette(png_row_infop row_info, png_bytep row, /* If the bit depth < 8, it is expanded to 8. Also, if the already * expanded transparency value is supplied, an alpha channel is built. */ -void /* PRIVATE */ +static void png_do_expand(png_row_infop row_info, png_bytep row, png_const_color_16p trans_color) { @@ -4925,7 +4569,7 @@ png_do_expand(png_row_infop row_info, png_bytep row, /* If the bit depth is 8 and the color type is not a palette type expand the * whole row to 16 bits. Has no effect otherwise. */ -void /* PRIVATE */ +static void png_do_expand_16(png_row_infop row_info, png_bytep row) { if (row_info->bit_depth == 8 && @@ -4953,7 +4597,7 @@ png_do_expand_16(png_row_infop row_info, png_bytep row) #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED -void /* PRIVATE */ +static void png_do_quantize(png_row_infop row_info, png_bytep row, png_const_bytep palette_lookup, png_const_bytep quantize_lookup) { @@ -5045,69 +4689,303 @@ png_do_quantize(png_row_infop row_info, png_bytep row, } } #endif /* PNG_READ_QUANTIZE_SUPPORTED */ -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ -#ifdef PNG_MNG_FEATURES_SUPPORTED -/* Undoes intrapixel differencing */ +/* Transform the row. The order of transformations is significant, + * and is very touchy. If you add a transformation, take care to + * decide how it fits in with the other transformations here. + */ void /* PRIVATE */ -png_do_read_intrapixel(png_row_infop row_info, png_bytep row) +png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info) { - png_debug(1, "in png_do_read_intrapixel"); + png_debug(1, "in png_do_read_transformations"); - if ( - (row_info->color_type & PNG_COLOR_MASK_COLOR)) + if (png_ptr->row_buf == NULL) { - int bytes_per_pixel; - png_uint_32 row_width = row_info->width; + /* Prior to 1.5.4 this output row/pass where the NULL pointer is, but this + * error is incredibly rare and incredibly easy to debug without this + * information. + */ + png_error(png_ptr, "NULL row buffer"); + } - if (row_info->bit_depth == 8) - { - png_bytep rp; - png_uint_32 i; + /* The following is debugging; prior to 1.5.4 the code was never compiled in; + * in 1.5.4 PNG_FLAG_DETECT_UNINITIALIZED was added and the macro + * PNG_WARN_UNINITIALIZED_ROW removed. In 1.6 the new flag is set only for + * all transformations, however in practice the ROW_INIT always gets done on + * demand, if necessary. + */ + if ((png_ptr->flags & PNG_FLAG_DETECT_UNINITIALIZED) != 0 && + !(png_ptr->flags & PNG_FLAG_ROW_INIT)) + { + /* Application has failed to call either png_read_start_image() or + * png_read_update_info() after setting transforms that expand pixels. + * This check added to libpng-1.2.19 (but not enabled until 1.5.4). + */ + png_error(png_ptr, "Uninitialized row"); + } - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 3; +#ifdef PNG_READ_EXPAND_SUPPORTED + if (png_ptr->transformations & PNG_EXPAND) + { + if (row_info->color_type == PNG_COLOR_TYPE_PALETTE) + { + png_do_expand_palette(row_info, png_ptr->row_buf + 1, + png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans); + } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 4; + else + { + if (png_ptr->num_trans && + (png_ptr->transformations & PNG_EXPAND_tRNS)) + png_do_expand(row_info, png_ptr->row_buf + 1, + &(png_ptr->trans_color)); else - return; - - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - *(rp) = (png_byte)((256 + *rp + *(rp + 1)) & 0xff); - *(rp+2) = (png_byte)((256 + *(rp + 2) + *(rp + 1)) & 0xff); - } + png_do_expand(row_info, png_ptr->row_buf + 1, + NULL); } - else if (row_info->bit_depth == 16) - { - png_bytep rp; - png_uint_32 i; + } +#endif - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 6; +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_STRIP_ALPHA) && + !(png_ptr->transformations & PNG_COMPOSE) && + (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) + png_do_strip_channel(row_info, png_ptr->row_buf + 1, + 0 /* at_start == false, because SWAP_ALPHA happens later */); +#endif - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 8; +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + if (png_ptr->transformations & PNG_RGB_TO_GRAY) + { + int rgb_error = + png_do_rgb_to_gray(png_ptr, row_info, + png_ptr->row_buf + 1); - else - return; + if (rgb_error) + { + png_ptr->rgb_to_gray_status=1; + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == + PNG_RGB_TO_GRAY_WARN) + png_warning(png_ptr, "png_do_rgb_to_gray found nongray pixel"); - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); - png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); - png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); - png_uint_32 red = (s0 + s1 + 65536) & 0xffff; - png_uint_32 blue = (s2 + s1 + 65536) & 0xffff; - *(rp ) = (png_byte)((red >> 8) & 0xff); - *(rp + 1) = (png_byte)(red & 0xff); - *(rp + 4) = (png_byte)((blue >> 8) & 0xff); - *(rp + 5) = (png_byte)(blue & 0xff); - } + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == + PNG_RGB_TO_GRAY_ERR) + png_error(png_ptr, "png_do_rgb_to_gray found nongray pixel"); } } +#endif + +/* From Andreas Dilger e-mail to png-implement, 26 March 1998: + * + * 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 + * pixel is transparent. You would also need to make sure that the + * transparency information is upgraded to RGB. + * + * To summarize, the current flow is: + * - Gray + simple transparency -> compare 1 or 2 gray bytes and composite + * with background "in place" if transparent, + * convert to RGB if necessary + * - Gray + alpha -> composite with gray background and remove alpha bytes, + * convert to RGB if necessary + * + * To support RGB backgrounds for gray images we need: + * - Gray + simple transparency -> convert to RGB + simple transparency, + * compare 3 or 6 bytes and composite with + * background "in place" if transparent + * (3x compare/pixel compared to doing + * composite with gray bkgrnd) + * - Gray + alpha -> convert to RGB + alpha, composite with background and + * remove alpha bytes (3x float + * operations/pixel compared with composite + * on gray background) + * + * Greg's change will do this. The reason it wasn't done before is for + * performance, as this increases the per-pixel operations. If we would check + * in advance if the background was gray or RGB, and position the gray-to-RGB + * transform appropriately, then it would save a lot of work/time. + */ + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + /* If gray -> RGB, do so now only if background is non-gray; else do later + * for performance reasons + */ + if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && + !(png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) + png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); +#endif + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) + if (png_ptr->transformations & PNG_COMPOSE) + png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr); +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED + if ((png_ptr->transformations & PNG_GAMMA) && +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + /* Because RGB_TO_GRAY does the gamma transform. */ + !(png_ptr->transformations & PNG_RGB_TO_GRAY) && +#endif +#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) + /* Because PNG_COMPOSE does the gamma transform if there is something to + * do (if there is an alpha channel or transparency.) + */ + !((png_ptr->transformations & PNG_COMPOSE) && + ((png_ptr->num_trans != 0) || + (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) && +#endif + /* Because png_init_read_transformations transforms the palette, unless + * RGB_TO_GRAY will do the transform. + */ + (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)) + png_do_gamma(row_info, png_ptr->row_buf + 1, png_ptr); +#endif + +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_STRIP_ALPHA) && + (png_ptr->transformations & PNG_COMPOSE) && + (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) + png_do_strip_channel(row_info, png_ptr->row_buf + 1, + 0 /* at_start == false, because SWAP_ALPHA happens later */); +#endif + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + if ((png_ptr->transformations & PNG_ENCODE_ALPHA) && + (row_info->color_type & PNG_COLOR_MASK_ALPHA)) + png_do_encode_alpha(row_info, png_ptr->row_buf + 1, png_ptr); +#endif + +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + if (png_ptr->transformations & PNG_SCALE_16_TO_8) + png_do_scale_16_to_8(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED + /* There is no harm in doing both of these because only one has any effect, + * by putting the 'scale' option first if the app asks for scale (either by + * calling the API or in a TRANSFORM flag) this is what happens. + */ + if (png_ptr->transformations & PNG_16_TO_8) + png_do_chop(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_QUANTIZE_SUPPORTED + if (png_ptr->transformations & PNG_QUANTIZE) + { + png_do_quantize(row_info, png_ptr->row_buf + 1, + png_ptr->palette_lookup, png_ptr->quantize_index); + + if (row_info->rowbytes == 0) + png_error(png_ptr, "png_do_quantize returned rowbytes=0"); + } +#endif /* PNG_READ_QUANTIZE_SUPPORTED */ + +#ifdef PNG_READ_EXPAND_16_SUPPORTED + /* Do the expansion now, after all the arithmetic has been done. Notice + * that previous transformations can handle the PNG_EXPAND_16 flag if this + * is efficient (particularly true in the case of gamma correction, where + * better accuracy results faster!) + */ + if (png_ptr->transformations & PNG_EXPAND_16) + png_do_expand_16(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + /* NOTE: moved here in 1.5.4 (from much later in this list.) */ + if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && + (png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) + png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_INVERT_SUPPORTED + if (png_ptr->transformations & PNG_INVERT_MONO) + png_do_invert(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_SHIFT_SUPPORTED + if (png_ptr->transformations & PNG_SHIFT) + png_do_unshift(row_info, png_ptr->row_buf + 1, + &(png_ptr->shift)); +#endif + +#ifdef PNG_READ_PACK_SUPPORTED + if (png_ptr->transformations & PNG_PACK) + png_do_unpack(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED + /* Added at libpng-1.5.10 */ + if (row_info->color_type == PNG_COLOR_TYPE_PALETTE && + png_ptr->num_palette_max >= 0) + png_do_check_palette_indexes(png_ptr, row_info); +#endif + +#ifdef PNG_READ_BGR_SUPPORTED + if (png_ptr->transformations & PNG_BGR) + png_do_bgr(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_PACKSWAP_SUPPORTED + if (png_ptr->transformations & PNG_PACKSWAP) + png_do_packswap(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_FILLER_SUPPORTED + if (png_ptr->transformations & PNG_FILLER) + png_do_read_filler(row_info, png_ptr->row_buf + 1, + (png_uint_32)png_ptr->filler, png_ptr->flags); +#endif + +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED + if (png_ptr->transformations & PNG_INVERT_ALPHA) + png_do_read_invert_alpha(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED + if (png_ptr->transformations & PNG_SWAP_ALPHA) + png_do_read_swap_alpha(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_16BIT_SUPPORTED +#ifdef PNG_READ_SWAP_SUPPORTED + if (png_ptr->transformations & PNG_SWAP_BYTES) + png_do_swap(row_info, png_ptr->row_buf + 1); +#endif +#endif + +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED + if (png_ptr->transformations & PNG_USER_TRANSFORM) + { + if (png_ptr->read_user_transform_fn != NULL) + (*(png_ptr->read_user_transform_fn)) /* User read transform function */ + (png_ptr, /* png_ptr */ + row_info, /* row_info: */ + /* png_uint_32 width; width of row */ + /* png_size_t rowbytes; number of bytes in row */ + /* png_byte color_type; color type of pixels */ + /* png_byte bit_depth; bit depth of samples */ + /* png_byte channels; number of channels (1-4) */ + /* png_byte pixel_depth; bits per pixel (depth*channels) */ + png_ptr->row_buf + 1); /* start of pixel data for row */ +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED + if (png_ptr->user_transform_depth) + row_info->bit_depth = png_ptr->user_transform_depth; + + if (png_ptr->user_transform_channels) + row_info->channels = png_ptr->user_transform_channels; +#endif + row_info->pixel_depth = (png_byte)(row_info->bit_depth * + row_info->channels); + + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_info->width); + } +#endif } -#endif /* PNG_MNG_FEATURES_SUPPORTED */ + +#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ #endif /* PNG_READ_SUPPORTED */ diff --git a/pngtrans.c b/pngtrans.c index 8f8bc5d9e..94f18df27 100644 --- a/pngtrans.c +++ b/pngtrans.c @@ -1,8 +1,8 @@ /* pngtrans.c - transforms the data in a row (used by both readers and writers) * - * Last changed in libpng 1.6.2 [April 25, 2013] - * Copyright (c) 1998-2013 Glenn Randers-Pehrson + * Last changed in libpng 1.6.9 [February 6, 2014] + * Copyright (c) 1998-2014 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.) * @@ -57,7 +57,9 @@ png_set_packing(png_structrp png_ptr) if (png_ptr->bit_depth < 8) { png_ptr->transformations |= PNG_PACK; - png_ptr->usr_bit_depth = 8; +# ifdef PNG_WRITE_SUPPORTED + png_ptr->usr_bit_depth = 8; +# endif } } #endif @@ -1,8 +1,8 @@ /* pngwio.c - functions for data output * - * Last changed in libpng 1.6.8 [December 19, 2013] - * Copyright (c) 1998-2013 Glenn Randers-Pehrson + * Last changed in libpng 1.6.9 [February 6, 2014] + * Copyright (c) 1998-2014 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.) * @@ -153,6 +153,7 @@ png_set_write_fn(png_structrp png_ptr, png_voidp io_ptr, PNG_UNUSED(output_flush_fn) #endif /* PNG_WRITE_FLUSH_SUPPORTED */ +#ifdef PNG_READ_SUPPORTED /* It is an error to read while writing a png file */ if (png_ptr->read_data_fn != NULL) { @@ -162,5 +163,6 @@ png_set_write_fn(png_structrp png_ptr, png_voidp io_ptr, "Can't set both read_data_fn and write_data_fn in the" " same structure"); } +#endif } #endif /* PNG_WRITE_SUPPORTED */ diff --git a/pngwrite.c b/pngwrite.c index 8f6df68b2..c3cb6070d 100644 --- a/pngwrite.c +++ b/pngwrite.c @@ -1,8 +1,8 @@ /* pngwrite.c - general routines to write a PNG file * - * Last changed in libpng 1.6.8 [December 19, 2013] - * Copyright (c) 1998-2013 Glenn Randers-Pehrson + * Last changed in libpng 1.6.9 [February 6, 2014] + * Copyright (c) 1998-2014 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.) * @@ -607,6 +607,71 @@ png_write_image(png_structrp png_ptr, png_bytepp image) } } +#ifdef PNG_MNG_FEATURES_SUPPORTED +/* Performs intrapixel differencing */ +static void +png_do_write_intrapixel(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_write_intrapixel"); + + if ((row_info->color_type & PNG_COLOR_MASK_COLOR)) + { + int bytes_per_pixel; + png_uint_32 row_width = row_info->width; + if (row_info->bit_depth == 8) + { + png_bytep rp; + png_uint_32 i; + + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + bytes_per_pixel = 3; + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + bytes_per_pixel = 4; + + else + return; + + for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) + { + *(rp) = (png_byte)((*rp - *(rp + 1)) & 0xff); + *(rp + 2) = (png_byte)((*(rp + 2) - *(rp + 1)) & 0xff); + } + } + +#ifdef PNG_WRITE_16BIT_SUPPORTED + else if (row_info->bit_depth == 16) + { + png_bytep rp; + png_uint_32 i; + + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + bytes_per_pixel = 6; + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + bytes_per_pixel = 8; + + else + return; + + for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) + { + png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); + png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); + png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); + png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL); + png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL); + *(rp ) = (png_byte)((red >> 8) & 0xff); + *(rp + 1) = (png_byte)(red & 0xff); + *(rp + 4) = (png_byte)((blue >> 8) & 0xff); + *(rp + 5) = (png_byte)(blue & 0xff); + } + } +#endif /* PNG_WRITE_16BIT_SUPPORTED */ + } +} +#endif /* PNG_MNG_FEATURES_SUPPORTED */ + /* Called by user to write a row of image data */ void PNGAPI png_write_row(png_structrp png_ptr, png_const_bytep row) diff --git a/pngwtran.c b/pngwtran.c index 98703f8c8..215bd68a9 100644 --- a/pngwtran.c +++ b/pngwtran.c @@ -1,8 +1,8 @@ /* pngwtran.c - transforms the data in a row for PNG writers * - * Last changed in libpng 1.6.0 [February 14, 2013] - * Copyright (c) 1998-2013 Glenn Randers-Pehrson + * Last changed in libpng 1.6.9 [February 6, 2014] + * Copyright (c) 1998-2014 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.) * @@ -14,90 +14,14 @@ #include "pngpriv.h" #ifdef PNG_WRITE_SUPPORTED - #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED -/* Transform the data according to the user's wishes. The order of - * transformations is significant. - */ -void /* PRIVATE */ -png_do_write_transformations(png_structrp png_ptr, png_row_infop row_info) -{ - png_debug(1, "in png_do_write_transformations"); - - if (png_ptr == NULL) - return; - -#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED - if (png_ptr->transformations & PNG_USER_TRANSFORM) - if (png_ptr->write_user_transform_fn != NULL) - (*(png_ptr->write_user_transform_fn)) /* User write transform - function */ - (png_ptr, /* png_ptr */ - row_info, /* row_info: */ - /* png_uint_32 width; width of row */ - /* png_size_t rowbytes; number of bytes in row */ - /* png_byte color_type; color type of pixels */ - /* png_byte bit_depth; bit depth of samples */ - /* png_byte channels; number of channels (1-4) */ - /* png_byte pixel_depth; bits per pixel (depth*channels) */ - png_ptr->row_buf + 1); /* start of pixel data for row */ -#endif - -#ifdef PNG_WRITE_FILLER_SUPPORTED - if (png_ptr->transformations & PNG_FILLER) - png_do_strip_channel(row_info, png_ptr->row_buf + 1, - !(png_ptr->flags & PNG_FLAG_FILLER_AFTER)); -#endif - -#ifdef PNG_WRITE_PACKSWAP_SUPPORTED - if (png_ptr->transformations & PNG_PACKSWAP) - png_do_packswap(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_WRITE_PACK_SUPPORTED - if (png_ptr->transformations & PNG_PACK) - png_do_pack(row_info, png_ptr->row_buf + 1, - (png_uint_32)png_ptr->bit_depth); -#endif - -#ifdef PNG_WRITE_SWAP_SUPPORTED - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_do_swap(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_WRITE_SHIFT_SUPPORTED - if (png_ptr->transformations & PNG_SHIFT) - png_do_shift(row_info, png_ptr->row_buf + 1, - &(png_ptr->shift)); -#endif - -#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED - if (png_ptr->transformations & PNG_SWAP_ALPHA) - png_do_write_swap_alpha(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED - if (png_ptr->transformations & PNG_INVERT_ALPHA) - png_do_write_invert_alpha(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_WRITE_BGR_SUPPORTED - if (png_ptr->transformations & PNG_BGR) - png_do_bgr(row_info, png_ptr->row_buf + 1); -#endif - -#ifdef PNG_WRITE_INVERT_SUPPORTED - if (png_ptr->transformations & PNG_INVERT_MONO) - png_do_invert(row_info, png_ptr->row_buf + 1); -#endif -} #ifdef PNG_WRITE_PACK_SUPPORTED /* Pack pixels into bytes. Pass the true bit depth in bit_depth. The * row_info bit depth should be 8 (one pixel per byte). The channels * should be 1 (this only happens on grayscale and paletted images). */ -void /* PRIVATE */ +static void png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) { png_debug(1, "in png_do_pack"); @@ -242,7 +166,7 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth) * would pass 3 as bit_depth, and this routine would translate the * data to 0 to 15. */ -void /* PRIVATE */ +static void png_do_shift(png_row_infop row_info, png_bytep row, png_const_color_8p bit_depth) { @@ -381,7 +305,7 @@ png_do_shift(png_row_infop row_info, png_bytep row, #endif #ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED -void /* PRIVATE */ +static void png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_write_swap_alpha"); @@ -475,7 +399,7 @@ png_do_write_swap_alpha(png_row_infop row_info, png_bytep row) #endif #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED -void /* PRIVATE */ +static void png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) { png_debug(1, "in png_do_write_invert_alpha"); @@ -568,70 +492,81 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row) } } #endif -#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */ -#ifdef PNG_MNG_FEATURES_SUPPORTED -/* Undoes intrapixel differencing */ +/* Transform the data according to the user's wishes. The order of + * transformations is significant. + */ void /* PRIVATE */ -png_do_write_intrapixel(png_row_infop row_info, png_bytep row) +png_do_write_transformations(png_structrp png_ptr, png_row_infop row_info) { - png_debug(1, "in png_do_write_intrapixel"); + png_debug(1, "in png_do_write_transformations"); - if ((row_info->color_type & PNG_COLOR_MASK_COLOR)) - { - int bytes_per_pixel; - png_uint_32 row_width = row_info->width; - if (row_info->bit_depth == 8) - { - png_bytep rp; - png_uint_32 i; + if (png_ptr == NULL) + return; - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 3; +#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED + if (png_ptr->transformations & PNG_USER_TRANSFORM) + if (png_ptr->write_user_transform_fn != NULL) + (*(png_ptr->write_user_transform_fn)) /* User write transform + function */ + (png_ptr, /* png_ptr */ + row_info, /* row_info: */ + /* png_uint_32 width; width of row */ + /* png_size_t rowbytes; number of bytes in row */ + /* png_byte color_type; color type of pixels */ + /* png_byte bit_depth; bit depth of samples */ + /* png_byte channels; number of channels (1-4) */ + /* png_byte pixel_depth; bits per pixel (depth*channels) */ + png_ptr->row_buf + 1); /* start of pixel data for row */ +#endif - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 4; +#ifdef PNG_WRITE_FILLER_SUPPORTED + if (png_ptr->transformations & PNG_FILLER) + png_do_strip_channel(row_info, png_ptr->row_buf + 1, + !(png_ptr->flags & PNG_FLAG_FILLER_AFTER)); +#endif - else - return; +#ifdef PNG_WRITE_PACKSWAP_SUPPORTED + if (png_ptr->transformations & PNG_PACKSWAP) + png_do_packswap(row_info, png_ptr->row_buf + 1); +#endif - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - *(rp) = (png_byte)((*rp - *(rp + 1)) & 0xff); - *(rp + 2) = (png_byte)((*(rp + 2) - *(rp + 1)) & 0xff); - } - } +#ifdef PNG_WRITE_PACK_SUPPORTED + if (png_ptr->transformations & PNG_PACK) + png_do_pack(row_info, png_ptr->row_buf + 1, + (png_uint_32)png_ptr->bit_depth); +#endif -#ifdef PNG_WRITE_16BIT_SUPPORTED - else if (row_info->bit_depth == 16) - { - png_bytep rp; - png_uint_32 i; +#ifdef PNG_WRITE_SWAP_SUPPORTED + if (png_ptr->transformations & PNG_SWAP_BYTES) + png_do_swap(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_WRITE_SHIFT_SUPPORTED + if (png_ptr->transformations & PNG_SHIFT) + png_do_shift(row_info, png_ptr->row_buf + 1, + &(png_ptr->shift)); +#endif - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - bytes_per_pixel = 6; +#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED + if (png_ptr->transformations & PNG_SWAP_ALPHA) + png_do_write_swap_alpha(row_info, png_ptr->row_buf + 1); +#endif - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - bytes_per_pixel = 8; +#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED + if (png_ptr->transformations & PNG_INVERT_ALPHA) + png_do_write_invert_alpha(row_info, png_ptr->row_buf + 1); +#endif - else - return; +#ifdef PNG_WRITE_BGR_SUPPORTED + if (png_ptr->transformations & PNG_BGR) + png_do_bgr(row_info, png_ptr->row_buf + 1); +#endif - for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) - { - png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); - png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); - png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); - png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL); - png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL); - *(rp ) = (png_byte)((red >> 8) & 0xff); - *(rp + 1) = (png_byte)(red & 0xff); - *(rp + 4) = (png_byte)((blue >> 8) & 0xff); - *(rp + 5) = (png_byte)(blue & 0xff); - } - } -#endif /* PNG_WRITE_16BIT_SUPPORTED */ - } +#ifdef PNG_WRITE_INVERT_SUPPORTED + if (png_ptr->transformations & PNG_INVERT_MONO) + png_do_invert(row_info, png_ptr->row_buf + 1); +#endif } -#endif /* PNG_MNG_FEATURES_SUPPORTED */ +#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */ #endif /* PNG_WRITE_SUPPORTED */ |