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update libpng to 1.6.8

This commit is contained in:
Barry Harris 2014-01-11 18:30:52 +00:00
parent b199b793a7
commit c6fadcb492
23 changed files with 37449 additions and 37208 deletions
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0
src/dep/libs/libpng/_fba_libpng_v162.txt → src/dep/libs/libpng/_fba_libpng_v168.txt
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54
src/dep/libs/libpng/png.c
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@ -1,7 +1,7 @@
/* png.c - location for general purpose libpng functions
*
* Last changed in libpng 1.6.2 [April 25, 2013]
* Last changed in libpng 1.6.8 [December 19, 2013]
* 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.)
@ -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_2 Your_png_h_is_not_version_1_6_2;
typedef png_libpng_version_1_6_8 Your_png_h_is_not_version_1_6_8;
/* 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
@ -201,6 +201,7 @@ png_user_version_check(png_structrp png_ptr, png_const_charp user_png_ver)
pos = png_safecat(m, (sizeof m), pos, user_png_ver);
pos = png_safecat(m, (sizeof m), pos, " but running with ");
pos = png_safecat(m, (sizeof m), pos, png_libpng_ver);
PNG_UNUSED(pos)
png_warning(png_ptr, m);
#endif
@ -259,6 +260,10 @@ png_create_png_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
*/
# ifdef PNG_USER_MEM_SUPPORTED
png_set_mem_fn(&create_struct, mem_ptr, malloc_fn, free_fn);
# else
PNG_UNUSED(mem_ptr)
PNG_UNUSED(malloc_fn)
PNG_UNUSED(free_fn)
# endif
/* (*error_fn) can return control to the caller after the error_ptr is set,
@ -768,13 +773,13 @@ png_get_copyright(png_const_structrp png_ptr)
#else
# ifdef __STDC__
return PNG_STRING_NEWLINE \
"libpng version 1.6.2 - April 25, 2013" PNG_STRING_NEWLINE \
"libpng version 1.6.8 - December 19, 2013" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2013 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 1.6.2 - April 25, 2013\
return "libpng version 1.6.8 - December 19, 2013\
Copyright (c) 1998-2013 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@ -855,7 +860,8 @@ png_handle_as_unknown(png_const_structrp png_ptr, png_const_bytep chunk_name)
return PNG_HANDLE_CHUNK_AS_DEFAULT;
}
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) ||\
defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
int /* PRIVATE */
png_chunk_unknown_handling(png_const_structrp png_ptr, png_uint_32 chunk_name)
{
@ -864,7 +870,7 @@ png_chunk_unknown_handling(png_const_structrp png_ptr, png_uint_32 chunk_name)
PNG_CSTRING_FROM_CHUNK(chunk_string, chunk_name);
return png_handle_as_unknown(png_ptr, chunk_string);
}
#endif /* READ_UNKNOWN_CHUNKS */
#endif /* READ_UNKNOWN_CHUNKS || HANDLE_AS_UNKNOWN */
#endif /* SET_UNKNOWN_CHUNKS */
#ifdef PNG_READ_SUPPORTED
@ -1721,6 +1727,7 @@ png_icc_profile_error(png_const_structrp png_ptr, png_colorspacerp colorspace,
# endif
/* The 'reason' is an arbitrary message, allow +79 maximum 195 */
pos = png_safecat(message, (sizeof message), pos, reason);
PNG_UNUSED(pos)
/* This is recoverable, but make it unconditionally an app_error on write to
* avoid writing invalid ICC profiles into PNG files. (I.e. we handle them
@ -3090,11 +3097,15 @@ png_fixed(png_const_structrp png_ptr, double fp, png_const_charp text)
if (r > 2147483647. || r < -2147483648.)
png_fixed_error(png_ptr, text);
# ifndef PNG_ERROR_TEXT_SUPPORTED
PNG_UNUSED(text)
# endif
return (png_fixed_point)r;
}
#endif
#if defined(PNG_READ_GAMMA_SUPPORTED) || \
#if defined(PNG_GAMMA_SUPPORTED) || defined(PNG_COLORSPACE_SUPPORTED) ||\
defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED)
/* muldiv functions */
/* This API takes signed arguments and rounds the result to the nearest
@ -3267,27 +3278,29 @@ png_gamma_significant(png_fixed_point gamma_val)
#endif
#ifdef PNG_READ_GAMMA_SUPPORTED
# ifdef PNG_16BIT_SUPPORTED
/* A local convenience routine. */
static png_fixed_point
png_product2(png_fixed_point a, png_fixed_point b)
{
/* The required result is 1/a * 1/b; the following preserves accuracy. */
#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
double r = a * 1E-5;
r *= b;
r = floor(r+.5);
if (r <= 2147483647. && r >= -2147483648.)
return (png_fixed_point)r;
#else
# else
png_fixed_point res;
if (png_muldiv(&res, a, b, 100000))
return res;
#endif
# endif
return 0; /* overflow */
}
# endif /* 16BIT */
/* The inverse of the above. */
png_fixed_point
@ -3592,6 +3605,7 @@ png_exp8bit(png_fixed_point lg2)
return (png_byte)((x + 0x7fffffU) >> 24);
}
#ifdef PNG_16BIT_SUPPORTED
static png_uint_16
png_exp16bit(png_fixed_point lg2)
{
@ -3602,6 +3616,7 @@ png_exp16bit(png_fixed_point lg2)
x -= x >> 16;
return (png_uint_16)((x + 32767U) >> 16);
}
#endif /* 16BIT */
#endif /* FLOATING_ARITHMETIC */
png_byte
@ -3627,6 +3642,7 @@ png_gamma_8bit_correct(unsigned int value, png_fixed_point gamma_val)
return (png_byte)value;
}
#ifdef PNG_16BIT_SUPPORTED
png_uint_16
png_gamma_16bit_correct(unsigned int value, png_fixed_point gamma_val)
{
@ -3649,6 +3665,7 @@ png_gamma_16bit_correct(unsigned int value, png_fixed_point gamma_val)
return (png_uint_16)value;
}
#endif /* 16BIT */
/* This does the right thing based on the bit_depth field of the
* png_struct, interpreting values as 8-bit or 16-bit. While the result
@ -3662,10 +3679,16 @@ png_gamma_correct(png_structrp png_ptr, unsigned int value,
if (png_ptr->bit_depth == 8)
return png_gamma_8bit_correct(value, gamma_val);
#ifdef PNG_16BIT_SUPPORTED
else
return png_gamma_16bit_correct(value, gamma_val);
#else
/* should not reach this */
return 0;
#endif /* 16BIT */
}
#ifdef PNG_16BIT_SUPPORTED
/* Internal function to build a single 16-bit table - the table consists of
* 'num' 256 entry subtables, where 'num' is determined by 'shift' - the amount
* to shift the input values right (or 16-number_of_signifiant_bits).
@ -3804,6 +3827,7 @@ png_build_16to8_table(png_structrp png_ptr, png_uint_16pp *ptable,
last++;
}
}
#endif /* 16BIT */
/* Build a single 8-bit table: same as the 16-bit case but much simpler (and
* typically much faster). Note that libpng currently does no sBIT processing
@ -3832,6 +3856,7 @@ png_destroy_gamma_table(png_structrp png_ptr)
png_free(png_ptr, png_ptr->gamma_table);
png_ptr->gamma_table = NULL;
#ifdef PNG_16BIT_SUPPORTED
if (png_ptr->gamma_16_table != NULL)
{
int i;
@ -3843,6 +3868,7 @@ png_destroy_gamma_table(png_structrp png_ptr)
png_free(png_ptr, png_ptr->gamma_16_table);
png_ptr->gamma_16_table = NULL;
}
#endif /* 16BIT */
#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \
@ -3852,6 +3878,7 @@ png_destroy_gamma_table(png_structrp png_ptr)
png_free(png_ptr, png_ptr->gamma_to_1);
png_ptr->gamma_to_1 = NULL;
#ifdef PNG_16BIT_SUPPORTED
if (png_ptr->gamma_16_from_1 != NULL)
{
int i;
@ -3874,6 +3901,7 @@ png_destroy_gamma_table(png_structrp png_ptr)
png_free(png_ptr, png_ptr->gamma_16_to_1);
png_ptr->gamma_16_to_1 = NULL;
}
#endif /* 16BIT */
#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */
}
@ -3919,6 +3947,7 @@ png_build_gamma_table(png_structrp png_ptr, int bit_depth)
}
#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */
}
#ifdef PNG_16BIT_SUPPORTED
else
{
png_byte shift, sig_bit;
@ -3975,24 +4004,20 @@ png_build_gamma_table(png_structrp png_ptr, int bit_depth)
png_ptr->gamma_shift = shift;
#ifdef PNG_16BIT_SUPPORTED
/* NOTE: prior to 1.5.4 this test used to include PNG_BACKGROUND (now
* PNG_COMPOSE). This effectively smashed the background calculation for
* 16-bit output because the 8-bit table assumes the result will be reduced
* to 8 bits.
*/
if (png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8))
#endif
png_build_16to8_table(png_ptr, &png_ptr->gamma_16_table, shift,
png_ptr->screen_gamma > 0 ? png_product2(png_ptr->colorspace.gamma,
png_ptr->screen_gamma) : PNG_FP_1);
#ifdef PNG_16BIT_SUPPORTED
else
png_build_16bit_table(png_ptr, &png_ptr->gamma_16_table, shift,
png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->colorspace.gamma,
png_ptr->screen_gamma) : PNG_FP_1);
#endif
#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \
@ -4012,6 +4037,7 @@ png_build_gamma_table(png_structrp png_ptr, int bit_depth)
}
#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */
}
#endif /* 16BIT */
}
#endif /* READ_GAMMA */

42
src/dep/libs/libpng/png.h
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@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library
*
* libpng version 1.6.2 - April 25, 2013
* libpng version 1.6.8 - December 19, 2013
* 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 1.6.2 - April 25, 2013: Glenn
* libpng versions 0.97, January 1998, through 1.6.8 - December 19, 2013: Glenn
* See also "Contributing Authors", below.
*
* Note about libpng version numbers:
@ -175,6 +175,20 @@
* 1.6.2beta01 16 10602 16.so.16.2[.0]
* 1.6.2rc01-06 16 10602 16.so.16.2[.0]
* 1.6.2 16 10602 16.so.16.2[.0]
* 1.6.3beta01-11 16 10603 16.so.16.3[.0]
* 1.6.3rc01 16 10603 16.so.16.3[.0]
* 1.6.3 16 10603 16.so.16.3[.0]
* 1.6.4beta01-02 16 10604 16.so.16.4[.0]
* 1.6.4rc01 16 10604 16.so.16.4[.0]
* 1.6.4 16 10604 16.so.16.4[.0]
* 1.6.5 16 10605 16.so.16.5[.0]
* 1.6.6 16 10606 16.so.16.6[.0]
* 1.6.7beta01-04 16 10607 16.so.16.7[.0]
* 1.6.7rc01-03 16 10607 16.so.16.7[.0]
* 1.6.7 16 10607 16.so.16.7[.0]
* 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]
*
* Henceforth the source version will match the shared-library major
* and minor numbers; the shared-library major version number will be
@ -206,7 +220,7 @@
*
* This code is released under the libpng license.
*
* libpng versions 1.2.6, August 15, 2004, through 1.6.2, April 25, 2013, are
* libpng versions 1.2.6, August 15, 2004, through 1.6.8, December 19, 2013, 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:
@ -318,13 +332,13 @@
* Y2K compliance in libpng:
* =========================
*
* April 25, 2013
* December 19, 2013
*
* 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 1.6.2 are Y2K compliant. It is my belief that
* upward through 1.6.8 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
@ -384,9 +398,9 @@
*/
/* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.6.2"
#define PNG_LIBPNG_VER_STRING "1.6.8"
#define PNG_HEADER_VERSION_STRING \
" libpng version 1.6.2 - April 25, 2013\n"
" libpng version 1.6.8 - December 19, 2013\n"
#define PNG_LIBPNG_VER_SONUM 16
#define PNG_LIBPNG_VER_DLLNUM 16
@ -394,7 +408,7 @@
/* 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 2
#define PNG_LIBPNG_VER_RELEASE 8
/* This should match the numeric part of the final component of
* PNG_LIBPNG_VER_STRING, omitting any leading zero:
@ -425,7 +439,7 @@
* 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 10602 /* 1.6.2 */
#define PNG_LIBPNG_VER 10608 /* 1.6.8 */
/* Library configuration: these options cannot be changed after
* the library has been built.
@ -530,7 +544,7 @@ 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_2;
typedef char* png_libpng_version_1_6_8;
/* Basic control structions. Read libpng-manual.txt or libpng.3 for more info.
*
@ -712,7 +726,8 @@ typedef png_time * png_timep;
typedef const png_time * png_const_timep;
typedef png_time * * png_timepp;
#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
#if defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED) ||\
defined(PNG_USER_CHUNKS_SUPPORTED)
/* png_unknown_chunk is a structure to hold queued chunks for which there is
* no specific support. The idea is that we can use this to queue
* up private chunks for output even though the library doesn't actually
@ -3186,6 +3201,7 @@ PNG_EXPORT(238, void, png_image_free, (png_imagep image));
#endif /* PNG_SIMPLIFIED_READ_SUPPORTED */
#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED
#ifdef PNG_STDIO_SUPPORTED
/* WRITE APIS
* ----------
* For write you must initialize a png_image structure to describe the image to
@ -3228,6 +3244,7 @@ PNG_EXPORT(240, int, png_image_write_to_stdio, (png_imagep image, FILE *file,
*
* Note that the write API does not support interlacing or sub-8-bit pixels.
*/
#endif /* PNG_STDIO_SUPPORTED */
#endif /* PNG_SIMPLIFIED_WRITE_SUPPORTED */
/*******************************************************************************
* END OF SIMPLIFIED API
@ -3267,7 +3284,8 @@ PNG_EXPORT(243, int, png_get_palette_max, (png_const_structp png_ptr,
#ifdef PNG_ARM_NEON_API_SUPPORTED
# define PNG_ARM_NEON 0 /* HARDWARE: ARM Neon SIMD instructions supported */
#endif
#define PNG_OPTION_NEXT 2 /* Next option - numbers must be even */
#define PNG_MAXIMUM_INFLATE_WINDOW 2 /* SOFTWARE: force maximum window */
#define PNG_OPTION_NEXT 4 /* Next option - numbers must be even */
/* Return values: NOTE: there are four values and 'off' is *not* zero */
#define PNG_OPTION_UNSET 0 /* Unset - defaults to off */

3
src/dep/libs/libpng/pngconf.h
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@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng
*
* libpng version 1.6.2 - April 25, 2013
* libpng version 1.6.8 - December 19, 2013
*
* Copyright (c) 1998-2013 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@ -238,6 +238,7 @@
# define PNGAPI _stdcall
# endif
# endif /* compiler/api */
/* NOTE: PNGCBAPI always defaults to PNGCAPI. */
# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)

21
src/dep/libs/libpng/pngdebug.h
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@ -1,11 +1,11 @@
/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
*
* Copyright (c) 1998-2011 Glenn Randers-Pehrson
* 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.)
*
* Last changed in libpng 1.5.0 [January 6, 2011]
* Last changed in libpng 1.6.8 [December 19, 2013]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -25,7 +25,7 @@
* (actually ((void)0)).
*
* level: level of detail of message, starting at 0. A level 'n'
* message is preceded by 'n' tab characters (not implemented
* message is preceded by 'n' 3-space indentations (not implemented
* on Microsoft compilers unless PNG_DEBUG_FILE is also
* defined, to allow debug DLL compilation with no standard IO).
* message: a printf(3) style text string. A trailing '\n' is added
@ -77,32 +77,29 @@
# endif /* PNG_DEBUG_FILE */
# if (PNG_DEBUG > 1)
/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
* non-ISO compilers
*/
# ifdef __STDC__
# ifndef png_debug
# define png_debug(l,m) \
do { \
int num_tabs=l; \
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
(num_tabs==2 ? " " : (num_tabs>2 ? " " : "")))); \
} while (0)
# endif
# ifndef png_debug1
# define png_debug1(l,m,p1) \
do { \
int num_tabs=l; \
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
(num_tabs==2 ? " " : (num_tabs>2 ? " " : ""))),p1); \
} while (0)
# endif
# ifndef png_debug2
# define png_debug2(l,m,p1,p2) \
do { \
int num_tabs=l; \
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
(num_tabs==2 ? " " : (num_tabs>2 ? " " : ""))),p1,p2);\
} while (0)
# endif
# else /* __STDC __ */

25
src/dep/libs/libpng/pngerror.c
View File

@ -1,7 +1,7 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
* Last changed in libpng 1.6.1 [March 28, 2013]
* Last changed in libpng 1.6.8 [December 19, 2013]
* 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.)
@ -382,6 +382,10 @@ png_benign_error(png_const_structrp png_ptr, png_const_charp error_message)
# endif
png_error(png_ptr, error_message);
}
# ifndef PNG_ERROR_TEXT_SUPPORTED
PNG_UNUSED(error_message)
# endif
}
void /* PRIVATE */
@ -391,6 +395,10 @@ png_app_warning(png_const_structrp png_ptr, png_const_charp error_message)
png_warning(png_ptr, error_message);
else
png_error(png_ptr, error_message);
# ifndef PNG_ERROR_TEXT_SUPPORTED
PNG_UNUSED(error_message)
# endif
}
void /* PRIVATE */
@ -400,6 +408,10 @@ png_app_error(png_const_structrp png_ptr, png_const_charp error_message)
png_warning(png_ptr, error_message);
else
png_error(png_ptr, error_message);
# ifndef PNG_ERROR_TEXT_SUPPORTED
PNG_UNUSED(error_message)
# endif
}
#endif /* BENIGN_ERRORS */
@ -416,7 +428,8 @@ static PNG_CONST char png_digit[16] = {
};
#define PNG_MAX_ERROR_TEXT 196 /* Currently limited be profile_error in png.c */
#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED)
#if defined(PNG_WARNINGS_SUPPORTED) || \
(defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED))
static void /* PRIVATE */
png_format_buffer(png_const_structrp png_ptr, png_charp buffer, png_const_charp
error_message)
@ -506,6 +519,10 @@ png_chunk_benign_error(png_const_structrp png_ptr, png_const_charp
else
png_chunk_error(png_ptr, error_message);
# ifndef PNG_ERROR_TEXT_SUPPORTED
PNG_UNUSED(error_message)
# endif
}
#endif
#endif /* PNG_READ_SUPPORTED */
@ -513,6 +530,10 @@ png_chunk_benign_error(png_const_structrp png_ptr, png_const_charp
void /* PRIVATE */
png_chunk_report(png_const_structrp png_ptr, png_const_charp message, int error)
{
# ifndef PNG_WARNINGS_SUPPORTED
PNG_UNUSED(message)
# endif
/* This is always supported, but for just read or just write it
* unconditionally does the right thing.
*/

8
src/dep/libs/libpng/pnglibconf.h
View File

@ -1,8 +1,8 @@
/* libpng 1.6.2 STANDARD API DEFINITION */
/* libpng 1.6.8 STANDARD API DEFINITION */
/* pnglibconf.h - library build configuration */
/* Libpng version 1.6.2 - April 25, 2013 */
/* Libpng version 1.6.8 - December 19, 2013 */
/* Copyright (c) 1998-2013 Glenn Randers-Pehrson */
@ -20,7 +20,6 @@
#define PNG_ALIGNED_MEMORY_SUPPORTED
/*#undef PNG_ARM_NEON_API_SUPPORTED*/
/*#undef PNG_ARM_NEON_CHECK_SUPPORTED*/
/*#undef PNG_ARM_NEON_SUPPORTED*/
#define PNG_BENIGN_ERRORS_SUPPORTED
#define PNG_BENIGN_READ_ERRORS_SUPPORTED
/*#undef PNG_BENIGN_WRITE_ERRORS_SUPPORTED*/
@ -105,7 +104,7 @@
#define PNG_SETJMP_SUPPORTED
#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
/*#undef PNG_SET_OPTION_SUPPORTED*/
#define PNG_SET_OPTION_SUPPORTED
#define PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_SET_USER_LIMITS_SUPPORTED
#define PNG_SIMPLIFIED_READ_AFIRST_SUPPORTED
@ -202,6 +201,7 @@
#define PNG_TEXT_Z_DEFAULT_STRATEGY 0
#define PNG_WEIGHT_SHIFT 8
#define PNG_ZBUF_SIZE 8192
#define PNG_ZLIB_VERNUM 0 /* unknown */
#define PNG_Z_DEFAULT_COMPRESSION (-1)
#define PNG_Z_DEFAULT_NOFILTER_STRATEGY 0
#define PNG_Z_DEFAULT_STRATEGY 1

8
src/dep/libs/libpng/pngmem.c
View File

@ -1,7 +1,7 @@
/* pngmem.c - stub functions for memory allocation
*
* Last changed in libpng 1.6.0 [February 14, 2013]
* Last changed in libpng 1.6.8 [December 19, 2013]
* 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.)
@ -73,9 +73,10 @@ png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size),
* to implement a user memory handler. This checks to be sure it isn't
* called with big numbers.
*/
#ifdef PNG_USER_MEM_SUPPORTED
#ifndef PNG_USER_MEM_SUPPORTED
PNG_UNUSED(png_ptr)
#endif
if (size > 0 && size <= PNG_SIZE_MAX
# ifdef PNG_MAX_MALLOC_64K
&& size <= 65536U
@ -95,6 +96,8 @@ png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size),
return NULL;
}
#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) ||\
defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED)
/* This is really here only to work round a spurious warning in GCC 4.6 and 4.7
* that arises because of the checks in png_realloc_array that are repeated in
* png_malloc_array.
@ -156,6 +159,7 @@ png_realloc_array,(png_const_structrp png_ptr, png_const_voidp old_array,
return NULL; /* error */
}
#endif /* TEXT || sPLT || STORE_UNKNOWN_CHUNKS */
/* Various functions that have different error handling are derived from this.
* png_malloc always exists, but if PNG_USER_MEM_SUPPORTED is defined a separate

8
src/dep/libs/libpng/pngpread.c
View File

@ -1,7 +1,7 @@
/* pngpread.c - read a png file in push mode
*
* Last changed in libpng 1.6.0 [February 14, 2013]
* Last changed in libpng 1.6.8 [December 19, 2013]
* 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.)
@ -151,7 +151,7 @@ png_process_some_data(png_structrp png_ptr, png_inforp info_ptr)
void /* PRIVATE */
png_push_read_sig(png_structrp png_ptr, png_inforp info_ptr)
{
png_size_t num_checked = png_ptr->sig_bytes,
png_size_t num_checked = png_ptr->sig_bytes, /* SAFE, does not exceed 8 */
num_to_check = 8 - num_checked;
if (png_ptr->buffer_size < num_to_check)
@ -285,8 +285,8 @@ png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr)
if (chunk_name == png_PLTE)
png_ptr->mode |= PNG_HAVE_PLTE;
}
#endif
else if (chunk_name == png_PLTE)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
@ -528,8 +528,8 @@ png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr)
png_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
}
#endif
else
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)

214
src/dep/libs/libpng/pngpriv.h
View File

@ -6,7 +6,7 @@
* (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 1.6.2 [April 25, 2013]
* Last changed in libpng 1.6.8 [December 19, 2013]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@ -88,6 +88,94 @@
# endif
#endif
/* Compile time options.
* =====================
* In a multi-arch build the compiler may compile the code several times for the
* same object module, producing different binaries for different architectures.
* When this happens configure-time setting of the target host options cannot be
* done and this interferes with the handling of the ARM NEON optimizations, and
* possibly other similar optimizations. Put additional tests here; in general
* this is needed when the same option can be changed at both compile time and
* run time depending on the target OS (i.e. iOS vs Android.)
*
* NOTE: symbol prefixing does not pass $(CFLAGS) to the preprocessor, because
* this is not possible with certain compilers (Oracle SUN OS CC), as a result
* it is necessary to ensure that all extern functions that *might* be used
* regardless of $(CFLAGS) get declared in this file. The test on __ARM_NEON__
* below is one example of this behavior because it is controlled by the
* presence or not of -mfpu=neon on the GCC command line, it is possible to do
* this in $(CC), e.g. "CC=gcc -mfpu=neon", but people who build libpng rarely
* do this.
*/
#ifndef PNG_ARM_NEON_OPT
/* ARM NEON optimizations are being controlled by the compiler settings,
* typically the target FPU. If the FPU has been set to NEON (-mfpu=neon
* with GCC) then the compiler will define __ARM_NEON__ and we can rely
* unconditionally on NEON instructions not crashing, otherwise we must
* disable use of NEON instructions.
*
* NOTE: at present these optimizations depend on 'ALIGNED_MEMORY', so they
* can only be turned on automatically if that is supported too. If
* PNG_ARM_NEON_OPT is set in CPPFLAGS (to >0) then arm/arm_init.c will fail
* to compile with an appropriate #error if ALIGNED_MEMORY has been turned
* off.
*/
# if defined(__ARM_NEON__) && defined(PNG_ALIGNED_MEMORY_SUPPORTED)
# define PNG_ARM_NEON_OPT 2
# else
# define PNG_ARM_NEON_OPT 0
# endif
#endif
#if PNG_ARM_NEON_OPT > 0
/* NEON optimizations are to be at least considered by libpng, so enable the
* callbacks to do this.
*/
# define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_neon
/* 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
* be:
*
* 1 The intrinsics code (the default with __ARM_NEON__)
* 2 The hand coded assembler (the default without __ARM_NEON__)
*
* It is possible to set PNG_ARM_NEON_IMPLEMENTATION in CPPFLAGS, however
* this is *NOT* supported and may cease to work even after a minor revision
* to libpng. It *is* valid to do this for testing purposes, e.g. speed
* testing or a new compiler, but the results should be communicated to the
* libpng implementation list for incorporation in the next minor release.
*/
# ifndef PNG_ARM_NEON_IMPLEMENTATION
# ifdef __ARM_NEON__
# if defined(__clang__)
/* At present it is unknown by the libpng developers which versions
* of clang support the intrinsics, however some or perhaps all
* versions do not work with the assembler so this may be
* irrelevant, so just use the default (do nothing here.)
*/
# elif defined(__GNUC__)
/* GCC 4.5.4 NEON support is known to be broken. 4.6.3 is known to
* work, so if this *is* GCC, or G++, look for a version >4.5
*/
# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)
# define PNG_ARM_NEON_IMPLEMENTATION 2
# endif /* no GNUC support */
# endif /* __GNUC__ */
# else /* !defined __ARM_NEON__ */
/* The 'intrinsics' code simply won't compile without this -mfpu=neon:
*/
# define PNG_ARM_NEON_IMPLEMENTATION 2
# endif /* __ARM_NEON__ */
# endif /* !defined PNG_ARM_NEON_IMPLEMENTATION */
# ifndef PNG_ARM_NEON_IMPLEMENTATION
/* Use the intrinsics code by default. */
# define PNG_ARM_NEON_IMPLEMENTATION 1
# endif
#endif /* PNG_ARM_NEON_OPT > 0 */
/* Is this a build of a DLL where compilation of the object modules requires
* different preprocessor settings to those required for a simple library? If
* so PNG_BUILD_DLL must be set.
@ -630,37 +718,64 @@
* architectures where (int) is only 16 bits.
*/
#define PNG_32b(b,s) ((png_uint_32)(b) << (s))
#define PNG_CHUNK(b1,b2,b3,b4) \
#define PNG_U32(b1,b2,b3,b4) \
(PNG_32b(b1,24) | PNG_32b(b2,16) | PNG_32b(b3,8) | PNG_32b(b4,0))
#define png_IHDR PNG_CHUNK( 73, 72, 68, 82)
#define png_IDAT PNG_CHUNK( 73, 68, 65, 84)
#define png_IEND PNG_CHUNK( 73, 69, 78, 68)
#define png_PLTE PNG_CHUNK( 80, 76, 84, 69)
#define png_bKGD PNG_CHUNK( 98, 75, 71, 68)
#define png_cHRM PNG_CHUNK( 99, 72, 82, 77)
#define png_gAMA PNG_CHUNK(103, 65, 77, 65)
#define png_hIST PNG_CHUNK(104, 73, 83, 84)
#define png_iCCP PNG_CHUNK(105, 67, 67, 80)
#define png_iTXt PNG_CHUNK(105, 84, 88, 116)
#define png_oFFs PNG_CHUNK(111, 70, 70, 115)
#define png_pCAL PNG_CHUNK(112, 67, 65, 76)
#define png_sCAL PNG_CHUNK(115, 67, 65, 76)
#define png_pHYs PNG_CHUNK(112, 72, 89, 115)
#define png_sBIT PNG_CHUNK(115, 66, 73, 84)
#define png_sPLT PNG_CHUNK(115, 80, 76, 84)
#define png_sRGB PNG_CHUNK(115, 82, 71, 66)
#define png_sTER PNG_CHUNK(115, 84, 69, 82)
#define png_tEXt PNG_CHUNK(116, 69, 88, 116)
#define png_tIME PNG_CHUNK(116, 73, 77, 69)
#define png_tRNS PNG_CHUNK(116, 82, 78, 83)
#define png_zTXt PNG_CHUNK(122, 84, 88, 116)
/* Constants for known chunk types.
*
* MAINTAINERS: If you need to add a chunk, define the name here.
* For historical reasons these constants have the form png_<name>; i.e.
* the prefix is lower case. Please use decimal values as the parameters to
* match the ISO PNG specification and to avoid relying on the C locale
* interpretation of character values. Please keep the list sorted.
*
* Notice that PNG_U32 is used to define a 32-bit value for the 4 byte chunk
* type. In fact the specification does not express chunk types this way,
* however using a 32-bit value means that the chunk type can be read from the
* stream using exactly the same code as used for a 32-bit unsigned value and
* can be examined far more efficiently (using one arithmetic compare).
*
* Prior to 1.5.6 the chunk type constants were expressed as C strings. The
* libpng API still uses strings for 'unknown' chunks and a macro,
* PNG_STRING_FROM_CHUNK, allows a string to be generated if required. Notice
* that for portable code numeric values must still be used; the string "IHDR"
* is not portable and neither is PNG_U32('I', 'H', 'D', 'R').
*
* In 1.7.0 the definitions will be made public in png.h to avoid having to
* duplicate the same definitions in application code.
*/
#define png_IDAT PNG_U32( 73, 68, 65, 84)
#define png_IEND PNG_U32( 73, 69, 78, 68)
#define png_IHDR PNG_U32( 73, 72, 68, 82)
#define png_PLTE PNG_U32( 80, 76, 84, 69)
#define png_bKGD PNG_U32( 98, 75, 71, 68)
#define png_cHRM PNG_U32( 99, 72, 82, 77)
#define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */
#define png_gAMA PNG_U32(103, 65, 77, 65)
#define png_gIFg PNG_U32(103, 73, 70, 103)
#define png_gIFt PNG_U32(103, 73, 70, 116) /* deprecated */
#define png_gIFx PNG_U32(103, 73, 70, 120)
#define png_hIST PNG_U32(104, 73, 83, 84)
#define png_iCCP PNG_U32(105, 67, 67, 80)
#define png_iTXt PNG_U32(105, 84, 88, 116)
#define png_oFFs PNG_U32(111, 70, 70, 115)
#define png_pCAL PNG_U32(112, 67, 65, 76)
#define png_pHYs PNG_U32(112, 72, 89, 115)
#define png_sBIT PNG_U32(115, 66, 73, 84)
#define png_sCAL PNG_U32(115, 67, 65, 76)
#define png_sPLT PNG_U32(115, 80, 76, 84)
#define png_sRGB PNG_U32(115, 82, 71, 66)
#define png_sTER PNG_U32(115, 84, 69, 82)
#define png_tEXt PNG_U32(116, 69, 88, 116)
#define png_tIME PNG_U32(116, 73, 77, 69)
#define png_tRNS PNG_U32(116, 82, 78, 83)
#define png_zTXt PNG_U32(122, 84, 88, 116)
/* The following will work on (signed char*) strings, whereas the get_uint_32
* macro will fail on top-bit-set values because of the sign extension.
*/
#define PNG_CHUNK_FROM_STRING(s)\
PNG_CHUNK(0xff&(s)[0], 0xff&(s)[1], 0xff&(s)[2], 0xff&(s)[3])
PNG_U32(0xff&(s)[0], 0xff&(s)[1], 0xff&(s)[2], 0xff&(s)[3])
/* This uses (char), not (png_byte) to avoid warnings on systems where (char) is
* signed and the argument is a (char[]) This macro will fail miserably on
@ -694,6 +809,24 @@
#include "pngstruct.h"
#include "pnginfo.h"
/* Validate the include paths - the include path used to generate pnglibconf.h
* must match that used in the build, or we must be using pnglibconf.h.prebuilt:
*/
#if PNG_ZLIB_VERNUM != 0 && PNG_ZLIB_VERNUM != ZLIB_VERNUM
# error ZLIB_VERNUM != PNG_ZLIB_VERNUM \
"-I (include path) error: see the notes in pngpriv.h"
/* This means that when pnglibconf.h was built the copy of zlib.h that it
* used is not the same as the one being used here. Because the build of
* libpng makes decisions to use inflateInit2 and inflateReset2 based on the
* zlib version number and because this affects handling of certain broken
* PNG files the -I directives must match.
*
* The most likely explanation is that you passed a -I in CFLAGS, this will
* not work; all the preprocessor directories and in particular all the -I
* directives must be in CPPFLAGS.
*/
#endif
/* This is used for 16 bit gamma tables -- only the top level pointers are
* const; this could be changed:
*/
@ -1091,7 +1224,7 @@ PNG_INTERNAL_FUNCTION(void,png_read_finish_IDAT,(png_structrp png_ptr),
PNG_INTERNAL_FUNCTION(void,png_read_finish_row,(png_structrp png_ptr),
PNG_EMPTY);
/* Finish a row while reading, dealing with interlacing passes, etc. */
#endif
#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */
/* Initialize the row buffers, etc. */
PNG_INTERNAL_FUNCTION(void,png_read_start_row,(png_structrp png_ptr),PNG_EMPTY);
@ -1337,7 +1470,6 @@ PNG_INTERNAL_FUNCTION(void,png_handle_zTXt,(png_structrp png_ptr,
PNG_INTERNAL_FUNCTION(void,png_check_chunk_name,(png_structrp png_ptr,
png_uint_32 chunk_name),PNG_EMPTY);
#ifdef PNG_READ_SUPPORTED
PNG_INTERNAL_FUNCTION(void,png_handle_unknown,(png_structrp png_ptr,
png_inforp info_ptr, png_uint_32 length, int keep),PNG_EMPTY);
/* This is the function that gets called for unknown chunks. The 'keep'
@ -1346,16 +1478,14 @@ PNG_INTERNAL_FUNCTION(void,png_handle_unknown,(png_structrp png_ptr,
* just skips the chunk or errors out if it is critical.
*/
#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
#if defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) ||\
defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
PNG_INTERNAL_FUNCTION(int,png_chunk_unknown_handling,
(png_const_structrp png_ptr, png_uint_32 chunk_name),PNG_EMPTY);
/* Exactly as the API png_handle_as_unknown() except that the argument is a
* 32-bit chunk name, not a string.
*/
#endif
#endif /* PNG_READ_UNKNOWN_CHUNKS_SUPPORTED */
#endif /* PNG_READ_SUPPORTED */
#endif /* READ_UNKNOWN_CHUNKS || HANDLE_AS_UNKNOWN */
/* Handle the transformations for reading and writing */
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
@ -1774,7 +1904,7 @@ PNG_INTERNAL_FUNCTION(int,png_check_fp_string,(png_const_charp string,
png_size_t size),PNG_EMPTY);
#endif /* pCAL || sCAL */
#if defined(PNG_READ_GAMMA_SUPPORTED) ||\
#if defined(PNG_GAMMA_SUPPORTED) ||\
defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED)
/* Added at libpng version 1.5.0 */
/* This is a utility to provide a*times/div (rounded) and indicate
@ -1891,14 +2021,22 @@ PNG_INTERNAL_FUNCTION(void, png_image_free, (png_imagep image), PNG_EMPTY);
#endif /* SIMPLIFIED READ/WRITE */
/* These are initialization functions for hardware specific PNG filter
* optimizations; list these here then select the appropriate one at compile
* time using the macro PNG_FILTER_OPTIMIZATIONS. If the macro is not defined
* the generic code is used.
*/
#ifdef PNG_FILTER_OPTIMIZATIONS
PNG_INTERNAL_FUNCTION(void, PNG_FILTER_OPTIMIZATIONS, (png_structp png_ptr,
unsigned int bpp), PNG_EMPTY);
/* This is the initialization function for hardware specific optimizations,
* one implementation (for ARM NEON machines) is contained in
* arm/filter_neon.c. It need not be defined - the generic code will be used
* if not.
unsigned int bpp), PNG_EMPTY);
/* Just declare the optimization that will be used */
#else
/* List *all* the possible optimizations here - this branch is required if
* the builder of libpng passes the definition of PNG_FILTER_OPTIMIZATIONS in
* CFLAGS in place of CPPFLAGS *and* uses symbol prefixing.
*/
PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_neon,
(png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
#endif
/* Maintainer: Put new private prototypes here ^ */

208
src/dep/libs/libpng/pngread.c
View File

@ -1,7 +1,7 @@
/* pngread.c - read a PNG file
*
* Last changed in libpng 1.6.1 [March 28, 2013]
* Last changed in libpng 1.6.8 [December 19, 2013]
* 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.)
@ -1125,12 +1125,11 @@ png_read_png(png_structrp png_ptr, png_inforp info_ptr,
/* Arguments to png_image_finish_read: */
/* Encoding of PNG data (used by the color-map code) */
/* TODO: change these, dang, ANSI-C reserves the 'E' namespace. */
# define E_NOTSET 0 /* File encoding not yet known */
# define E_sRGB 1 /* 8-bit encoded to sRGB gamma */
# define E_LINEAR 2 /* 16-bit linear: not encoded, NOT pre-multiplied! */
# define E_FILE 3 /* 8-bit encoded to file gamma, not sRGB or linear */
# define E_LINEAR8 4 /* 8-bit linear: only from a file value */
# define P_NOTSET 0 /* File encoding not yet known */
# define P_sRGB 1 /* 8-bit encoded to sRGB gamma */
# define P_LINEAR 2 /* 16-bit linear: not encoded, NOT pre-multiplied! */
# define P_FILE 3 /* 8-bit encoded to file gamma, not sRGB or linear */
# define P_LINEAR8 4 /* 8-bit linear: only from a file value */
/* Color-map processing: after libpng has run on the PNG image further
* processing may be needed to conver the data to color-map indicies.
@ -1161,7 +1160,7 @@ typedef struct
png_voidp first_row;
ptrdiff_t row_bytes; /* step between rows */
int file_encoding; /* E_ values above */
png_fixed_point gamma_to_linear; /* For E_FILE, reciprocal of gamma */
png_fixed_point gamma_to_linear; /* For P_FILE, reciprocal of gamma */
int colormap_processing; /* PNG_CMAP_ values above */
} png_image_read_control;
@ -1293,7 +1292,7 @@ png_image_read_header(png_voidp argument)
#ifdef PNG_COLORSPACE_SUPPORTED
/* Does the colorspace match sRGB? If there is no color endpoint
* (colorant) information assume yes, otherwise require the
* 'ENDPOINTS_MATCHE_sRGB' colorspace flag to have been set. If the
* 'ENDPOINTS_MATCHP_sRGB' colorspace flag to have been set. If the
* colorspace has been determined to be invalid ignore it.
*/
if ((format & PNG_FORMAT_FLAG_COLOR) != 0 && ((png_ptr->colorspace.flags
@ -1482,17 +1481,24 @@ png_image_skip_unused_chunks(png_structrp png_ptr)
*
* Or image data handling:
*
* tRNS, bKGD, gAMA, cHRM, sRGB, iCCP and sBIT.
* tRNS, bKGD, gAMA, cHRM, sRGB, [iCCP] and sBIT.
*
* This provides a small performance improvement and eliminates any
* potential vulnerability to security problems in the unused chunks.
*
* At present the iCCP chunk data isn't used, so iCCP chunk can be ignored
* too. This allows the simplified API to be compiled without iCCP support,
* however if the support is there the chunk is still checked to detect
* errors (which are unfortunately quite common.)
*/
{
static PNG_CONST png_byte chunks_to_process[] = {
98, 75, 71, 68, '\0', /* bKGD */
99, 72, 82, 77, '\0', /* cHRM */
103, 65, 77, 65, '\0', /* gAMA */
# ifdef PNG_READ_iCCP_SUPPORTED
105, 67, 67, 80, '\0', /* iCCP */
# endif
115, 66, 73, 84, '\0', /* sBIT */
115, 82, 71, 66, '\0', /* sRGB */
};
@ -1529,25 +1535,25 @@ set_file_encoding(png_image_read_control *display)
{
if (png_gamma_not_sRGB(g))
{
display->file_encoding = E_FILE;
display->file_encoding = P_FILE;
display->gamma_to_linear = png_reciprocal(g);
}
else
display->file_encoding = E_sRGB;
display->file_encoding = P_sRGB;
}
else
display->file_encoding = E_LINEAR8;
display->file_encoding = P_LINEAR8;
}
static unsigned int
decode_gamma(png_image_read_control *display, png_uint_32 value, int encoding)
{
if (encoding == E_FILE) /* double check */
if (encoding == P_FILE) /* double check */
encoding = display->file_encoding;
if (encoding == E_NOTSET) /* must be the file encoding */
if (encoding == P_NOTSET) /* must be the file encoding */
{
set_file_encoding(display);
encoding = display->file_encoding;
@ -1555,18 +1561,18 @@ decode_gamma(png_image_read_control *display, png_uint_32 value, int encoding)
switch (encoding)
{
case E_FILE:
case P_FILE:
value = png_gamma_16bit_correct(value*257, display->gamma_to_linear);
break;
case E_sRGB:
case P_sRGB:
value = png_sRGB_table[value];
break;
case E_LINEAR:
case P_LINEAR:
break;
case E_LINEAR8:
case P_LINEAR8:
value *= 257;
break;
@ -1585,9 +1591,9 @@ png_colormap_compose(png_image_read_control *display,
png_uint_32 background, int encoding)
{
/* The file value is composed on the background, the background has the given
* encoding and so does the result, the file is encoded with E_FILE and the
* encoding and so does the result, the file is encoded with P_FILE and the
* file and alpha are 8-bit values. The (output) encoding will always be
* E_LINEAR or E_sRGB.
* P_LINEAR or P_sRGB.
*/
png_uint_32 f = decode_gamma(display, foreground, foreground_encoding);
png_uint_32 b = decode_gamma(display, background, encoding);
@ -1597,7 +1603,7 @@ png_colormap_compose(png_image_read_control *display,
*/
f = f * alpha + b * (255-alpha);
if (encoding == E_LINEAR)
if (encoding == P_LINEAR)
{
/* Scale to 65535; divide by 255, approximately (in fact this is extremely
* accurate, it divides by 255.00000005937181414556, with no overflow.)
@ -1607,13 +1613,13 @@ png_colormap_compose(png_image_read_control *display,
f = (f+32768) >> 16;
}
else /* E_sRGB */
else /* P_sRGB */
f = PNG_sRGB_FROM_LINEAR(f);
return f;
}
/* NOTE: E_LINEAR values to this routine must be 16-bit, but E_FILE values must
/* NOTE: P_LINEAR values to this routine must be 16-bit, but P_FILE values must
* be 8-bit.
*/
static void
@ -1623,7 +1629,7 @@ png_create_colormap_entry(png_image_read_control *display,
{
png_imagep image = display->image;
const int output_encoding = (image->format & PNG_FORMAT_FLAG_LINEAR) ?
E_LINEAR : E_sRGB;
P_LINEAR : P_sRGB;
const int convert_to_Y = (image->format & PNG_FORMAT_FLAG_COLOR) == 0 &&
(red != green || green != blue);
@ -1633,18 +1639,18 @@ png_create_colormap_entry(png_image_read_control *display,
/* Update the cache with whether the file gamma is significantly different
* from sRGB.
*/
if (encoding == E_FILE)
if (encoding == P_FILE)
{
if (display->file_encoding == E_NOTSET)
if (display->file_encoding == P_NOTSET)
set_file_encoding(display);
/* Note that the cached value may be E_FILE too, but if it is then the
/* Note that the cached value may be P_FILE too, but if it is then the
* gamma_to_linear member has been set.
*/
encoding = display->file_encoding;
}
if (encoding == E_FILE)
if (encoding == P_FILE)
{
png_fixed_point g = display->gamma_to_linear;
@ -1652,10 +1658,10 @@ png_create_colormap_entry(png_image_read_control *display,
green = png_gamma_16bit_correct(green*257, g);
blue = png_gamma_16bit_correct(blue*257, g);
if (convert_to_Y || output_encoding == E_LINEAR)
if (convert_to_Y || output_encoding == P_LINEAR)
{
alpha *= 257;
encoding = E_LINEAR;
encoding = P_LINEAR;
}
else
@ -1663,11 +1669,11 @@ png_create_colormap_entry(png_image_read_control *display,
red = PNG_sRGB_FROM_LINEAR(red * 255);
green = PNG_sRGB_FROM_LINEAR(green * 255);
blue = PNG_sRGB_FROM_LINEAR(blue * 255);
encoding = E_sRGB;
encoding = P_sRGB;
}
}
else if (encoding == E_LINEAR8)
else if (encoding == P_LINEAR8)
{
/* This encoding occurs quite frequently in test cases because PngSuite
* includes a gAMA 1.0 chunk with most images.
@ -1676,10 +1682,10 @@ png_create_colormap_entry(png_image_read_control *display,
green *= 257;
blue *= 257;
alpha *= 257;
encoding = E_LINEAR;
encoding = P_LINEAR;
}
else if (encoding == E_sRGB && (convert_to_Y || output_encoding == E_LINEAR))
else if (encoding == P_sRGB && (convert_to_Y || output_encoding == P_LINEAR))
{
/* The values are 8-bit sRGB values, but must be converted to 16-bit
* linear.
@ -1688,11 +1694,11 @@ png_create_colormap_entry(png_image_read_control *display,
green = png_sRGB_table[green];
blue = png_sRGB_table[blue];
alpha *= 257;
encoding = E_LINEAR;
encoding = P_LINEAR;
}
/* This is set if the color isn't gray but the output is. */
if (encoding == E_LINEAR)
if (encoding == P_LINEAR)
{
if (convert_to_Y)
{
@ -1700,7 +1706,7 @@ png_create_colormap_entry(png_image_read_control *display,
png_uint_32 y = (png_uint_32)6968 * red + (png_uint_32)23434 * green +
(png_uint_32)2366 * blue;
if (output_encoding == E_LINEAR)
if (output_encoding == P_LINEAR)
y = (y + 16384) >> 15;
else
@ -1709,19 +1715,19 @@ png_create_colormap_entry(png_image_read_control *display,
y = (y + 128) >> 8;
y *= 255;
y = PNG_sRGB_FROM_LINEAR((y + 64) >> 7);
encoding = E_sRGB;
encoding = P_sRGB;
}
blue = red = green = y;
}
else if (output_encoding == E_sRGB)
else if (output_encoding == P_sRGB)
{
red = PNG_sRGB_FROM_LINEAR(red * 255);
green = PNG_sRGB_FROM_LINEAR(green * 255);
blue = PNG_sRGB_FROM_LINEAR(blue * 255);
alpha = PNG_DIV257(alpha);
encoding = E_sRGB;
encoding = P_sRGB;
}
}
@ -1730,7 +1736,7 @@ png_create_colormap_entry(png_image_read_control *display,
/* Store the value. */
{
# ifdef PNG_FORMAT_BGR_SUPPORTED
# ifdef PNG_FORMAT_AFIRST_SUPPORTED
const int afirst = (image->format & PNG_FORMAT_FLAG_AFIRST) != 0 &&
(image->format & PNG_FORMAT_FLAG_ALPHA) != 0;
# else
@ -1742,7 +1748,7 @@ png_create_colormap_entry(png_image_read_control *display,
# define bgr 0
# endif
if (output_encoding == E_LINEAR)
if (output_encoding == P_LINEAR)
{
png_uint_16p entry = png_voidcast(png_uint_16p, display->colormap);
@ -1797,7 +1803,7 @@ png_create_colormap_entry(png_image_read_control *display,
}
}
else /* output encoding is E_sRGB */
else /* output encoding is P_sRGB */
{
png_bytep entry = png_voidcast(png_bytep, display->colormap);
@ -1839,7 +1845,7 @@ make_gray_file_colormap(png_image_read_control *display)
unsigned int i;
for (i=0; i<256; ++i)
png_create_colormap_entry(display, i, i, i, i, 255, E_FILE);
png_create_colormap_entry(display, i, i, i, i, 255, P_FILE);
return i;
}
@ -1850,7 +1856,7 @@ make_gray_colormap(png_image_read_control *display)
unsigned int i;
for (i=0; i<256; ++i)
png_create_colormap_entry(display, i, i, i, i, 255, E_sRGB);
png_create_colormap_entry(display, i, i, i, i, 255, P_sRGB);
return i;
}
@ -1889,13 +1895,13 @@ make_ga_colormap(png_image_read_control *display)
while (i < 231)
{
unsigned int gray = (i * 256 + 115) / 231;
png_create_colormap_entry(display, i++, gray, gray, gray, 255, E_sRGB);
png_create_colormap_entry(display, i++, gray, gray, gray, 255, P_sRGB);
}
/* 255 is used here for the component values for consistency with the code
* that undoes premultiplication in pngwrite.c.
*/
png_create_colormap_entry(display, i++, 255, 255, 255, 0, E_sRGB);
png_create_colormap_entry(display, i++, 255, 255, 255, 0, P_sRGB);
for (a=1; a<5; ++a)
{
@ -1903,7 +1909,7 @@ make_ga_colormap(png_image_read_control *display)
for (g=0; g<6; ++g)
png_create_colormap_entry(display, i++, g*51, g*51, g*51, a*51,
E_sRGB);
P_sRGB);
}
return i;
@ -1927,7 +1933,7 @@ make_rgb_colormap(png_image_read_control *display)
for (b=0; b<6; ++b)
png_create_colormap_entry(display, i++, r*51, g*51, b*51, 255,
E_sRGB);
P_sRGB);
}
}
@ -1950,11 +1956,11 @@ png_image_read_colormap(png_voidp argument)
const png_structrp png_ptr = image->opaque->png_ptr;
const png_uint_32 output_format = image->format;
const int output_encoding = (output_format & PNG_FORMAT_FLAG_LINEAR) ?
E_LINEAR : E_sRGB;
P_LINEAR : P_sRGB;
unsigned int cmap_entries;
unsigned int output_processing; /* Output processing option */
unsigned int data_encoding = E_NOTSET; /* Encoding libpng must produce */
unsigned int data_encoding = P_NOTSET; /* Encoding libpng must produce */
/* Background information; the background color and the index of this color
* in the color-map if it exists (else 256).
@ -1974,7 +1980,7 @@ png_image_read_colormap(png_voidp argument)
png_ptr->num_trans > 0) /* alpha in input */ &&
((output_format & PNG_FORMAT_FLAG_ALPHA) == 0) /* no alpha in output */)
{
if (output_encoding == E_LINEAR) /* compose on black */
if (output_encoding == P_LINEAR) /* compose on black */
back_b = back_g = back_r = 0;
else if (display->background == NULL /* no way to remove it */)
@ -1998,7 +2004,7 @@ png_image_read_colormap(png_voidp argument)
}
}
else if (output_encoding == E_LINEAR)
else if (output_encoding == P_LINEAR)
back_b = back_r = back_g = 65535;
else
@ -2056,7 +2062,7 @@ png_image_read_colormap(png_voidp argument)
trans = png_ptr->trans_color.gray;
if ((output_format & PNG_FORMAT_FLAG_ALPHA) == 0)
back_alpha = output_encoding == E_LINEAR ? 65535 : 255;
back_alpha = output_encoding == P_LINEAR ? 65535 : 255;
}
/* png_create_colormap_entry just takes an RGBA and writes the
@ -2074,7 +2080,7 @@ png_image_read_colormap(png_voidp argument)
*/
if (i != trans)
png_create_colormap_entry(display, i, val, val, val, 255,
E_FILE/*8-bit with file gamma*/);
P_FILE/*8-bit with file gamma*/);
/* Else this entry is transparent. The colors don't matter if
* there is an alpha channel (back_alpha == 0), but it does no
@ -2090,7 +2096,7 @@ png_image_read_colormap(png_voidp argument)
}
/* We need libpng to preserve the original encoding. */
data_encoding = E_FILE;
data_encoding = P_FILE;
/* The rows from libpng, while technically gray values, are now also
* color-map indicies; however, they may need to be expanded to 1
@ -2119,7 +2125,7 @@ png_image_read_colormap(png_voidp argument)
* ensuring that the corresponding gray level matches the background
* color exactly.
*/
data_encoding = E_sRGB;
data_encoding = P_sRGB;
if (PNG_GRAY_COLORMAP_ENTRIES > image->colormap_entries)
png_error(png_ptr, "gray[16] color-map: too few entries");
@ -2143,7 +2149,7 @@ png_image_read_colormap(png_voidp argument)
png_color_16 c;
png_uint_32 gray = back_g;
if (output_encoding == E_LINEAR)
if (output_encoding == P_LINEAR)
{
gray = PNG_sRGB_FROM_LINEAR(gray * 255);
@ -2151,7 +2157,7 @@ png_image_read_colormap(png_voidp argument)
* matches.
*/
png_create_colormap_entry(display, gray, back_g, back_g,
back_g, 65535, E_LINEAR);
back_g, 65535, P_LINEAR);
}
/* The background passed to libpng, however, must be the
@ -2172,7 +2178,7 @@ png_image_read_colormap(png_voidp argument)
break;
}
back_alpha = output_encoding == E_LINEAR ? 65535 : 255;
back_alpha = output_encoding == P_LINEAR ? 65535 : 255;
}
/* output_processing means that the libpng-processed row will be
@ -2209,7 +2215,7 @@ png_image_read_colormap(png_voidp argument)
* worry about tRNS matching - tRNS is ignored if there is an alpha
* channel.
*/
data_encoding = E_sRGB;
data_encoding = P_sRGB;
if (output_format & PNG_FORMAT_FLAG_ALPHA)
{
@ -2252,13 +2258,13 @@ png_image_read_colormap(png_voidp argument)
cmap_entries = make_gray_colormap(display);
if (output_encoding == E_LINEAR)
if (output_encoding == P_LINEAR)
{
gray = PNG_sRGB_FROM_LINEAR(gray * 255);
/* And make sure the corresponding palette entry matches. */
png_create_colormap_entry(display, gray, back_g, back_g,
back_g, 65535, E_LINEAR);
back_g, 65535, P_LINEAR);
}
/* The background passed to libpng, however, must be the sRGB
@ -2289,7 +2295,7 @@ png_image_read_colormap(png_voidp argument)
{
png_uint_32 gray = (i * 256 + 115) / 231;
png_create_colormap_entry(display, i++, gray, gray, gray,
255, E_sRGB);
255, P_sRGB);
}
/* NOTE: this preserves the full precision of the application
@ -2297,7 +2303,7 @@ png_image_read_colormap(png_voidp argument)
*/
background_index = i;
png_create_colormap_entry(display, i++, back_r, back_g, back_b,
output_encoding == E_LINEAR ? 65535U : 255U, output_encoding);
output_encoding == P_LINEAR ? 65535U : 255U, output_encoding);
/* For non-opaque input composite on the sRGB background - this
* requires inverting the encoding for each component. The input
@ -2307,7 +2313,7 @@ png_image_read_colormap(png_voidp argument)
* represents. Consequently 'G' is always sRGB encoded, while
* 'A' is linear. We need the linear background colors.
*/
if (output_encoding == E_sRGB) /* else already linear */
if (output_encoding == P_sRGB) /* else already linear */
{
/* This may produce a value not exactly matching the
* background, but that's ok because these numbers are only
@ -2337,7 +2343,7 @@ png_image_read_colormap(png_voidp argument)
png_create_colormap_entry(display, i++,
PNG_sRGB_FROM_LINEAR(gray + back_rx),
PNG_sRGB_FROM_LINEAR(gray + back_gx),
PNG_sRGB_FROM_LINEAR(gray + back_bx), 255, E_sRGB);
PNG_sRGB_FROM_LINEAR(gray + back_bx), 255, P_sRGB);
}
}
@ -2364,7 +2370,7 @@ png_image_read_colormap(png_voidp argument)
*/
png_set_rgb_to_gray_fixed(png_ptr, PNG_ERROR_ACTION_NONE, -1,
-1);
data_encoding = E_sRGB;
data_encoding = P_sRGB;
/* The output will now be one or two 8-bit gray or gray+alpha
* channels. The more complex case arises when the input has alpha.
@ -2409,7 +2415,7 @@ png_image_read_colormap(png_voidp argument)
png_gamma_not_sRGB(png_ptr->colorspace.gamma))
{
cmap_entries = make_gray_file_colormap(display);
data_encoding = E_FILE;
data_encoding = P_FILE;
}
else
@ -2428,18 +2434,18 @@ png_image_read_colormap(png_voidp argument)
* it. Achieve this simply by ensuring that the entry
* selected for the background really is the background color.
*/
if (data_encoding == E_FILE) /* from the fixup above */
if (data_encoding == P_FILE) /* from the fixup above */
{
/* The app supplied a gray which is in output_encoding, we
* need to convert it to a value of the input (E_FILE)
* need to convert it to a value of the input (P_FILE)
* encoding then set this palette entry to the required
* output encoding.
*/
if (output_encoding == E_sRGB)
gray = png_sRGB_table[gray]; /* now E_LINEAR */
if (output_encoding == P_sRGB)
gray = png_sRGB_table[gray]; /* now P_LINEAR */
gray = PNG_DIV257(png_gamma_16bit_correct(gray,
png_ptr->colorspace.gamma)); /* now E_FILE */
png_ptr->colorspace.gamma)); /* now P_FILE */
/* And make sure the corresponding palette entry contains
* exactly the required sRGB value.
@ -2448,14 +2454,14 @@ png_image_read_colormap(png_voidp argument)
back_g, 0/*unused*/, output_encoding);
}
else if (output_encoding == E_LINEAR)
else if (output_encoding == P_LINEAR)
{
gray = PNG_sRGB_FROM_LINEAR(gray * 255);
/* And make sure the corresponding palette entry matches.
*/
png_create_colormap_entry(display, gray, back_g, back_g,
back_g, 0/*unused*/, E_LINEAR);
back_g, 0/*unused*/, P_LINEAR);
}
/* The background passed to libpng, however, must be the
@ -2485,7 +2491,7 @@ png_image_read_colormap(png_voidp argument)
* to do it once and using PNG_DIV51 on the 6x6x6 reduced RGB cube.
* Consequently we always want libpng to produce sRGB data.
*/
data_encoding = E_sRGB;
data_encoding = P_sRGB;
/* Is there any transparency or alpha? */
if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
@ -2505,7 +2511,7 @@ png_image_read_colormap(png_voidp argument)
/* Add a transparent entry. */
png_create_colormap_entry(display, cmap_entries, 255, 255,
255, 0, E_sRGB);
255, 0, P_sRGB);
/* This is stored as the background index for the processing
* algorithm.
@ -2526,7 +2532,7 @@ png_image_read_colormap(png_voidp argument)
*/
for (b=0; b<256; b = (b << 1) | 0x7f)
png_create_colormap_entry(display, cmap_entries++,
r, g, b, 128, E_sRGB);
r, g, b, 128, P_sRGB);
}
}
@ -2555,7 +2561,7 @@ png_image_read_colormap(png_voidp argument)
png_create_colormap_entry(display, cmap_entries, back_r,
back_g, back_b, 0/*unused*/, output_encoding);
if (output_encoding == E_LINEAR)
if (output_encoding == P_LINEAR)
{
r = PNG_sRGB_FROM_LINEAR(back_r * 255);
g = PNG_sRGB_FROM_LINEAR(back_g * 255);
@ -2595,11 +2601,11 @@ png_image_read_colormap(png_voidp argument)
*/
for (b=0; b<256; b = (b << 1) | 0x7f)
png_create_colormap_entry(display, cmap_entries++,
png_colormap_compose(display, r, E_sRGB, 128,
png_colormap_compose(display, r, P_sRGB, 128,
back_r, output_encoding),
png_colormap_compose(display, g, E_sRGB, 128,
png_colormap_compose(display, g, P_sRGB, 128,
back_g, output_encoding),
png_colormap_compose(display, b, E_sRGB, 128,
png_colormap_compose(display, b, P_sRGB, 128,
back_b, output_encoding),
0/*unused*/, output_encoding);
}
@ -2658,7 +2664,7 @@ png_image_read_colormap(png_voidp argument)
num_trans = 0;
output_processing = PNG_CMAP_NONE;
data_encoding = E_FILE; /* Don't change from color-map indicies */
data_encoding = P_FILE; /* Don't change from color-map indicies */
cmap_entries = png_ptr->num_palette;
if (cmap_entries > 256)
cmap_entries = 256;
@ -2680,13 +2686,13 @@ png_image_read_colormap(png_voidp argument)
* on the sRGB color in 'back'.
*/
png_create_colormap_entry(display, i,
png_colormap_compose(display, colormap[i].red, E_FILE,
png_colormap_compose(display, colormap[i].red, P_FILE,
trans[i], back_r, output_encoding),
png_colormap_compose(display, colormap[i].green, E_FILE,
png_colormap_compose(display, colormap[i].green, P_FILE,
trans[i], back_g, output_encoding),
png_colormap_compose(display, colormap[i].blue, E_FILE,
png_colormap_compose(display, colormap[i].blue, P_FILE,
trans[i], back_b, output_encoding),
output_encoding == E_LINEAR ? trans[i] * 257U :
output_encoding == P_LINEAR ? trans[i] * 257U :
trans[i],
output_encoding);
}
@ -2695,7 +2701,7 @@ png_image_read_colormap(png_voidp argument)
else
png_create_colormap_entry(display, i, colormap[i].red,
colormap[i].green, colormap[i].blue,
i < num_trans ? trans[i] : 255U, E_FILE/*8-bit*/);
i < num_trans ? trans[i] : 255U, P_FILE/*8-bit*/);
}
/* The PNG data may have indicies packed in fewer than 8 bits, it
@ -2723,12 +2729,12 @@ png_image_read_colormap(png_voidp argument)
png_error(png_ptr, "bad data option (internal error)");
break;
case E_sRGB:
case P_sRGB:
/* Change to 8-bit sRGB */
png_set_alpha_mode_fixed(png_ptr, PNG_ALPHA_PNG, PNG_GAMMA_sRGB);
/* FALL THROUGH */
case E_FILE:
case P_FILE:
if (png_ptr->bit_depth > 8)
png_set_scale_16(png_ptr);
break;
@ -2805,7 +2811,6 @@ png_image_read_and_map(png_voidp argument)
break;
default:
passes = 0;
png_error(png_ptr, "unknown interlace type");
}
@ -3124,7 +3129,6 @@ png_image_read_composite(png_voidp argument)
break;
default:
passes = 0;
png_error(png_ptr, "unknown interlace type");
}
@ -3273,11 +3277,15 @@ png_image_read_background(png_voidp argument)
break;
default:
passes = 0;
png_error(png_ptr, "unknown interlace type");
}
switch (png_get_bit_depth(png_ptr, info_ptr))
/* Use direct access to info_ptr here because otherwise the simplified API
* would require PNG_EASY_ACCESS_SUPPORTED (just for this.) Note this is
* checking the value after libpng expansions, not the original value in the
* PNG.
*/
switch (info_ptr->bit_depth)
{
default:
png_error(png_ptr, "unexpected bit depth");
@ -3285,7 +3293,7 @@ png_image_read_background(png_voidp argument)
case 8:
/* 8-bit sRGB gray values with an alpha channel; the alpha channel is
* to be removed by composing on a backgroundi: either the row if
* to be removed by composing on a background: either the row if
* display->background is NULL or display->background->green if not.
* Unlike the code above ALPHA_OPTIMIZED has *not* been done.
*/
@ -3425,8 +3433,10 @@ png_image_read_background(png_voidp argument)
unsigned int outchannels = 1+preserve_alpha;
int swap_alpha = 0;
if (preserve_alpha && (image->format & PNG_FORMAT_FLAG_AFIRST))
swap_alpha = 1;
# ifdef PNG_SIMPLIFIED_READ_AFIRST_SUPPORTED
if (preserve_alpha && (image->format & PNG_FORMAT_FLAG_AFIRST))
swap_alpha = 1;
# endif
for (pass = 0; pass < passes; ++pass)
{

50
src/dep/libs/libpng/pngrtran.c
View File

@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* Last changed in libpng 1.6.2 [April 25, 2013]
* Last changed in libpng 1.6.8 [December 19, 2013]
* 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.)
@ -1116,12 +1116,18 @@ png_init_palette_transformations(png_structrp png_ptr)
/* Ignore if all the entries are opaque (unlikely!) */
for (i=0; i<png_ptr->num_trans; ++i)
{
if (png_ptr->trans_alpha[i] == 255)
continue;
else if (png_ptr->trans_alpha[i] == 0)
input_has_transparency = 1;
else
{
input_has_transparency = 1;
input_has_alpha = 1;
break;
}
}
}
/* If no alpha we can optimize. */
@ -1878,31 +1884,34 @@ png_init_read_transformations(png_structrp png_ptr)
* the number of significant bits is 0 then no shift is done (this is an
* error condition which is silently ignored.)
*/
if (shift > 0 && shift < 8) for (i=0; i<istop; ++i)
{
int component = png_ptr->palette[i].red;
if (shift > 0 && shift < 8)
for (i=0; i<istop; ++i)
{
int component = png_ptr->palette[i].red;
component >>= shift;
png_ptr->palette[i].red = (png_byte)component;
}
component >>= shift;
png_ptr->palette[i].red = (png_byte)component;
}
shift = 8 - png_ptr->sig_bit.green;
if (shift > 0 && shift < 8) for (i=0; i<istop; ++i)
{
int component = png_ptr->palette[i].green;
if (shift > 0 && shift < 8)
for (i=0; i<istop; ++i)
{
int component = png_ptr->palette[i].green;
component >>= shift;
png_ptr->palette[i].green = (png_byte)component;
}
component >>= shift;
png_ptr->palette[i].green = (png_byte)component;
}
shift = 8 - png_ptr->sig_bit.blue;
if (shift > 0 && shift < 8) for (i=0; i<istop; ++i)
{
int component = png_ptr->palette[i].blue;
if (shift > 0 && shift < 8)
for (i=0; i<istop; ++i)
{
int component = png_ptr->palette[i].blue;
component >>= shift;
png_ptr->palette[i].blue = (png_byte)component;
}
component >>= shift;
png_ptr->palette[i].blue = (png_byte)component;
}
}
#endif /* PNG_READ_SHIFT_SUPPORTED */
}
@ -1933,6 +1942,9 @@ png_read_transform_info(png_structrp png_ptr, png_inforp info_ptr)
info_ptr->bit_depth = 8;
info_ptr->num_trans = 0;
if (png_ptr->palette == NULL)
png_error (png_ptr, "Palette is NULL in indexed image");
}
else
{

67
src/dep/libs/libpng/pngrutil.c
View File

@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
* Last changed in libpng 1.6.2 [April 25, 2013]
* Last changed in libpng 1.6.8 [December 19, 2013]
* 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.)
@ -18,8 +18,6 @@
#ifdef PNG_READ_SUPPORTED
#define png_strtod(p,a,b) strtod(a,b)
png_uint_32 PNGAPI
png_get_uint_31(png_const_structrp png_ptr, png_const_bytep buf)
{
@ -280,6 +278,10 @@ png_crc_error(png_structrp png_ptr)
return (0);
}
#if defined(PNG_READ_iCCP_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) ||\
defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_READ_sCAL_SUPPORTED) ||\
defined(PNG_READ_sPLT_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) ||\
defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_SEQUENTIAL_READ_SUPPORTED)
/* Manage the read buffer; this simply reallocates the buffer if it is not small
* enough (or if it is not allocated). The routine returns a pointer to the
* buffer; if an error occurs and 'warn' is set the routine returns NULL, else
@ -327,6 +329,7 @@ png_read_buffer(png_structrp png_ptr, png_alloc_size_t new_size, int warn)
return buffer;
}
#endif /* PNG_READ_iCCP|iTXt|pCAL|sCAL|sPLT|tEXt|zTXt|SEQUENTIAL_READ */
/* png_inflate_claim: claim the zstream for some nefarious purpose that involves
* decompression. Returns Z_OK on success, else a zlib error code. It checks
@ -334,7 +337,7 @@ png_read_buffer(png_structrp png_ptr, png_alloc_size_t new_size, int warn)
* chunk apparently owns the stream. Prior to release it does a png_error.
*/
static int
png_inflate_claim(png_structrp png_ptr, png_uint_32 owner, int window_bits)
png_inflate_claim(png_structrp png_ptr, png_uint_32 owner)
{
if (png_ptr->zowner != 0)
{
@ -369,6 +372,22 @@ png_inflate_claim(png_structrp png_ptr, png_uint_32 owner, int window_bits)
*/
{
int ret; /* zlib return code */
# if PNG_ZLIB_VERNUM >= 0x1240
# if defined(PNG_SET_OPTION_SUPPORTED) && \
defined(PNG_MAXIMUM_INFLATE_WINDOW)
int window_bits;
if (((png_ptr->options >> PNG_MAXIMUM_INFLATE_WINDOW) & 3) ==
PNG_OPTION_ON)
window_bits = 15;
else
window_bits = 0;
# else
# define window_bits 0
# endif
# endif
/* Set this for safety, just in case the previous owner left pointers to
* memory allocations.
@ -380,8 +399,7 @@ png_inflate_claim(png_structrp png_ptr, png_uint_32 owner, int window_bits)
if (png_ptr->flags & PNG_FLAG_ZSTREAM_INITIALIZED)
{
# if ZLIB_VERNUM < 0x1240
PNG_UNUSED(window_bits)
# if PNG_ZLIB_VERNUM < 0x1240
ret = inflateReset(&png_ptr->zstream);
# else
ret = inflateReset2(&png_ptr->zstream, window_bits);
@ -390,7 +408,7 @@ png_inflate_claim(png_structrp png_ptr, png_uint_32 owner, int window_bits)
else
{
# if ZLIB_VERNUM < 0x1240
# if PNG_ZLIB_VERNUM < 0x1240
ret = inflateInit(&png_ptr->zstream);
# else
ret = inflateInit2(&png_ptr->zstream, window_bits);
@ -408,6 +426,10 @@ png_inflate_claim(png_structrp png_ptr, png_uint_32 owner, int window_bits)
return ret;
}
# ifdef window_bits
# undef window_bits
# endif
}
#ifdef PNG_READ_COMPRESSED_TEXT_SUPPORTED
@ -580,14 +602,8 @@ png_decompress_chunk(png_structrp png_ptr,
if (limit < *newlength)
*newlength = limit;
/* Now try to claim the stream; the 'warn' setting causes zlib to be told
* to use the maximum window size during inflate; this hides errors in the
* deflate header window bits value which is used if '0' is passed. In
* fact this only has an effect with zlib versions 1.2.4 and later - see
* the comments in png_inflate_claim above.
*/
ret = png_inflate_claim(png_ptr, png_ptr->chunk_name,
png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN ? 15 : 0);
/* Now try to claim the stream. */
ret = png_inflate_claim(png_ptr, png_ptr->chunk_name);
if (ret == Z_OK)
{
@ -1357,8 +1373,7 @@ png_handle_iCCP(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
{
read_length -= keyword_length+2;
if (png_inflate_claim(png_ptr, png_iCCP,
png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN ? 15 : 0) == Z_OK)
if (png_inflate_claim(png_ptr, png_iCCP) == Z_OK)
{
Byte profile_header[132];
Byte local_buffer[PNG_INFLATE_BUF_SIZE];
@ -2922,9 +2937,8 @@ png_handle_unknown(png_structrp png_ptr, png_inforp info_ptr,
}
# endif
}
# else /* no store support! */
# else /* no store support: the chunk must be handled by the user callback */
PNG_UNUSED(info_ptr)
# error untested code (reading unknown chunks with no store support)
# endif
/* Regardless of the error handling below the cached data (if any) can be
@ -3684,7 +3698,7 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
for (i = 0; i < row_info->width; i++)
{
png_byte v[8];
png_byte v[8]; /* SAFE; pixel_depth does not exceed 64 */
int j;
memcpy(v, sp, pixel_bytes);
@ -3862,7 +3876,6 @@ png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row,
if (pb < pa) pa = pb, a = b;
if (pc < pa) a = c;
c = b;
a += *row;
*row++ = (png_byte)a;
}
@ -3870,7 +3883,8 @@ png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row,
static void
png_init_filter_functions(png_structrp pp)
/* This function is called once for every PNG image to set the
/* This function is called once for every PNG image (except for PNG images
* that only use PNG_FILTER_VALUE_NONE for all rows) to set the
* implementations required to reverse the filtering of PNG rows. Reversing
* the filter is the first transformation performed on the row data. It is
* performed in place, therefore an implementation can be selected based on
@ -3912,10 +3926,13 @@ png_read_filter_row(png_structrp pp, png_row_infop row_info, png_bytep row,
* PNG_FILTER_OPTIMIZATIONS to a function that overrides the generic
* implementations. See png_init_filter_functions above.
*/
if (pp->read_filter[0] == NULL)
png_init_filter_functions(pp);
if (filter > PNG_FILTER_VALUE_NONE && filter < PNG_FILTER_VALUE_LAST)
{
if (pp->read_filter[0] == NULL)
png_init_filter_functions(pp);
pp->read_filter[filter-1](row_info, row, prev_row);
}
}
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
@ -4454,7 +4471,7 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
* IDAT stream has a bogus deflate header window_bits value, but this should
* not be happening any longer!)
*/
if (png_inflate_claim(png_ptr, png_IDAT, 0) != Z_OK)
if (png_inflate_claim(png_ptr, png_IDAT) != Z_OK)
png_error(png_ptr, png_ptr->zstream.msg);
png_ptr->flags |= PNG_FLAG_ROW_INIT;

15
src/dep/libs/libpng/pngset.c
View File

@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct
*
* Last changed in libpng 1.6.2 [April 25, 2013]
* Last changed in libpng 1.6.8 [December 19, 2013]
* 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.)
@ -238,16 +238,7 @@ png_set_IHDR(png_const_structrp png_ptr, png_inforp info_ptr,
info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
/* Check for potential overflow */
if (width >
(PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */
- 48 /* bigrowbuf hack */
- 1 /* filter byte */
- 7*8 /* rounding of width to multiple of 8 pixels */
- 8) /* extra max_pixel_depth pad */
info_ptr->rowbytes = 0;
else
info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
}
#ifdef PNG_oFFs_SUPPORTED
@ -536,7 +527,7 @@ png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr,
# endif
))
{
png_chunk_report(png_ptr, "Invalid palette", PNG_CHUNK_ERROR);
png_error(png_ptr, "Invalid palette");
return;
}

4
src/dep/libs/libpng/pngwio.c
View File

@ -1,7 +1,7 @@
/* pngwio.c - functions for data output
*
* Last changed in libpng 1.6.0 [February 14, 2013]
* Last changed in libpng 1.6.8 [December 19, 2013]
* 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.)
@ -149,6 +149,8 @@ png_set_write_fn(png_structrp png_ptr, png_voidp io_ptr,
# else
png_ptr->output_flush_fn = output_flush_fn;
# endif
#else
PNG_UNUSED(output_flush_fn)
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
/* It is an error to read while writing a png file */

102
src/dep/libs/libpng/pngwrite.c
View File

@ -1,7 +1,7 @@
/* pngwrite.c - general routines to write a PNG file
*
* Last changed in libpng 1.6.2 [April 25, 2013]
* Last changed in libpng 1.6.8 [December 19, 2013]
* 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.)
@ -494,51 +494,50 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
png_structrp png_ptr = png_create_png_struct(user_png_ver, error_ptr,
error_fn, warn_fn, mem_ptr, malloc_fn, free_fn);
#endif /* PNG_USER_MEM_SUPPORTED */
if (png_ptr != NULL)
{
/* Set the zlib control values to defaults; they can be overridden by the
* application after the struct has been created.
*/
png_ptr->zbuffer_size = PNG_ZBUF_SIZE;
/* Set the zlib control values to defaults; they can be overridden by the
* application after the struct has been created.
*/
png_ptr->zbuffer_size = PNG_ZBUF_SIZE;
/* The 'zlib_strategy' setting is irrelevant because png_default_claim in
* pngwutil.c defaults it according to whether or not filters will be used,
* and ignores this setting.
*/
png_ptr->zlib_strategy = PNG_Z_DEFAULT_STRATEGY;
png_ptr->zlib_level = PNG_Z_DEFAULT_COMPRESSION;
png_ptr->zlib_mem_level = 8;
png_ptr->zlib_window_bits = 15;
png_ptr->zlib_method = 8;
/* The 'zlib_strategy' setting is irrelevant because png_default_claim in
* pngwutil.c defaults it according to whether or not filters will be
* used, and ignores this setting.
*/
png_ptr->zlib_strategy = PNG_Z_DEFAULT_STRATEGY;
png_ptr->zlib_level = PNG_Z_DEFAULT_COMPRESSION;
png_ptr->zlib_mem_level = 8;
png_ptr->zlib_window_bits = 15;
png_ptr->zlib_method = 8;
#ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED
png_ptr->zlib_text_strategy = PNG_TEXT_Z_DEFAULT_STRATEGY;
png_ptr->zlib_text_level = PNG_TEXT_Z_DEFAULT_COMPRESSION;
png_ptr->zlib_text_mem_level = 8;
png_ptr->zlib_text_window_bits = 15;
png_ptr->zlib_text_method = 8;
png_ptr->zlib_text_strategy = PNG_TEXT_Z_DEFAULT_STRATEGY;
png_ptr->zlib_text_level = PNG_TEXT_Z_DEFAULT_COMPRESSION;
png_ptr->zlib_text_mem_level = 8;
png_ptr->zlib_text_window_bits = 15;
png_ptr->zlib_text_method = 8;
#endif /* PNG_WRITE_COMPRESSED_TEXT_SUPPORTED */
/* This is a highly dubious configuration option; by default it is off, but
* it may be appropriate for private builds that are testing extensions not
* conformant to the current specification, or of applications that must not
* fail to write at all costs!
*/
# ifdef PNG_BENIGN_WRITE_ERRORS_SUPPORTED
/* This is a highly dubious configuration option; by default it is off,
* but it may be appropriate for private builds that are testing
* extensions not conformant to the current specification, or of
* applications that must not fail to write at all costs!
*/
#ifdef PNG_BENIGN_WRITE_ERRORS_SUPPORTED
png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
/* In stable builds only warn if an application error can be completely
* handled.
*/
# endif
#endif
/* App warnings are warnings in release (or release candidate) builds but
* are errors during development.
*/
# if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC
/* App warnings are warnings in release (or release candidate) builds but
* are errors during development.
*/
#if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC
png_ptr->flags |= PNG_FLAG_APP_WARNINGS_WARN;
# endif
#endif
if (png_ptr != NULL)
{
/* TODO: delay this, it can be done in png_init_io() (if the app doesn't
* do it itself) avoiding setting the default function if it is not
* required.
@ -1639,14 +1638,16 @@ png_write_image_16bit(png_voidp argument)
if (image->format & PNG_FORMAT_FLAG_ALPHA)
{
if (image->format & PNG_FORMAT_FLAG_AFIRST)
{
aindex = -1;
++input_row; /* To point to the first component */
++output_row;
}
# ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED
if (image->format & PNG_FORMAT_FLAG_AFIRST)
{
aindex = -1;
++input_row; /* To point to the first component */
++output_row;
}
else
else
# endif
aindex = channels;
}
@ -1795,14 +1796,16 @@ png_write_image_8bit(png_voidp argument)
png_bytep row_end;
int aindex;
if (image->format & PNG_FORMAT_FLAG_AFIRST)
{
aindex = -1;
++input_row; /* To point to the first component */
++output_row;
}
# ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED
if (image->format & PNG_FORMAT_FLAG_AFIRST)
{
aindex = -1;
++input_row; /* To point to the first component */
++output_row;
}
else
else
# endif
aindex = channels;
/* Use row_end in place of a loop counter: */
@ -1882,7 +1885,8 @@ png_image_set_PLTE(png_image_write_control *display)
const png_uint_32 format = image->format;
const int channels = PNG_IMAGE_SAMPLE_CHANNELS(format);
# ifdef PNG_FORMAT_BGR_SUPPORTED
# if defined(PNG_FORMAT_BGR_SUPPORTED) &&\
defined(PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED)
const int afirst = (format & PNG_FORMAT_FLAG_AFIRST) != 0 &&
(format & PNG_FORMAT_FLAG_ALPHA) != 0;
# else