fries/GRRLIB
1
0
Fork 0
mirror of https://github.com/GRRLIB/GRRLIB.git synced 2024-11-25 16:22:20 +00:00
Code Issues Projects Releases Packages Wiki Activity

libpng updated to version 1.6.18.

Browse source
This commit is contained in:
Crayon2000 2015-09-28 02:10:33 -04:00
parent f1a3e81770
commit 83b47b1893
21 changed files with 1150 additions and 1787 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

48
GRRLIB/lib/png/LICENSE
View file

@ -10,21 +10,17 @@ this sentence.
This code is released under the libpng license. This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.6.16, December 22, 2014, are libpng versions 1.0.7, July 1, 2000, through 1.6.18, July 23, 2015, are
Copyright (c) 2004, 2006-2014 Glenn Randers-Pehrson, and are Copyright (c) 2000-2002, 2004, 2006-2015 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
Cosmin Truta
libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are
Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.0.6 distributed according to the same disclaimer and license as libpng-1.0.6
with the following individuals added to the list of Contributing Authors with the following individuals added to the list of Contributing Authors:
Simon-Pierre Cadieux Simon-Pierre Cadieux
Eric S. Raymond Eric S. Raymond
Mans Rullgard
Cosmin Truta
Gilles Vollant Gilles Vollant
James Yu
and with the following additions to the disclaimer: and with the following additions to the disclaimer:
@ -36,17 +32,17 @@ and with the following additions to the disclaimer:
the user. the user.
libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
Copyright (c) 1998, 1999 Glenn Randers-Pehrson, and are Copyright (c) 1998-2000 Glenn Randers-Pehrson, and are distributed according
distributed according to the same disclaimer and license as libpng-0.96, to the same disclaimer and license as libpng-0.96, with the following
with the following individuals added to the list of Contributing Authors: individuals added to the list of Contributing Authors:
Tom Lane Tom Lane
Glenn Randers-Pehrson Glenn Randers-Pehrson
Willem van Schaik Willem van Schaik
libpng versions 0.89, June 1996, through 0.96, May 1997, are libpng versions 0.89, June 1996, through 0.96, May 1997, are
Copyright (c) 1996, 1997 Andreas Dilger Copyright (c) 1996-1997 Andreas Dilger, and are
Distributed according to the same disclaimer and license as libpng-0.88, distributed according to the same disclaimer and license as libpng-0.88,
with the following individuals added to the list of Contributing Authors: with the following individuals added to the list of Contributing Authors:
John Bowler John Bowler
@ -57,7 +53,7 @@ with the following individuals added to the list of Contributing Authors:
Tom Tanner Tom Tanner
libpng versions 0.5, May 1995, through 0.88, January 1996, are libpng versions 0.5, May 1995, through 0.88, January 1996, are
Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
For the purposes of this copyright and license, "Contributing Authors" For the purposes of this copyright and license, "Contributing Authors"
is defined as the following set of individuals: is defined as the following set of individuals:
@ -80,13 +76,13 @@ Permission is hereby granted to use, copy, modify, and distribute this
source code, or portions hereof, for any purpose, without fee, subject source code, or portions hereof, for any purpose, without fee, subject
to the following restrictions: to the following restrictions:
1. The origin of this source code must not be misrepresented. 1. The origin of this source code must not be misrepresented.
2. Altered versions must be plainly marked as such and must not 2. Altered versions must be plainly marked as such and must not
be misrepresented as being the original source. be misrepresented as being the original source.
3. This Copyright notice may not be removed or altered from any 3. This Copyright notice may not be removed or altered from any
source or altered source distribution. source or altered source distribution.
The Contributing Authors and Group 42, Inc. specifically permit, without The Contributing Authors and Group 42, Inc. specifically permit, without
fee, and encourage the use of this source code as a component to fee, and encourage the use of this source code as a component to
@ -94,18 +90,18 @@ supporting the PNG file format in commercial products. If you use this
source code in a product, acknowledgment is not required but would be source code in a product, acknowledgment is not required but would be
appreciated. appreciated.
A "png_get_copyright" function is available, for convenient use in "about" A "png_get_copyright" function is available, for convenient use in "about"
boxes and the like: boxes and the like:
printf("%s",png_get_copyright(NULL)); printf("%s", png_get_copyright(NULL));
Also, the PNG logo (in PNG format, of course) is supplied in the Also, the PNG logo (in PNG format, of course) is supplied in the
files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
certification mark of the Open Source Initiative. a certification mark of the Open Source Initiative. OSI has not addressed
the additional disclaimers inserted at version 1.0.7.
Glenn Randers-Pehrson Glenn Randers-Pehrson
glennrp at users.sourceforge.net glennrp at users.sourceforge.net
December 22, 2014 July 23, 2015

296
GRRLIB/lib/png/png.c
View file

@ -1,8 +1,8 @@
/* png.c - location for general purpose libpng functions /* png.c - location for general purpose libpng functions
* *
* Last changed in libpng 1.6.16 [December 22, 2014] * Last changed in libpng 1.6.18 [July 23, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -14,7 +14,7 @@
#include "pngpriv.h" #include "pngpriv.h"
/* Generate a compiler error if there is an old png.h in the search path. */ /* Generate a compiler error if there is an old png.h in the search path. */
typedef png_libpng_version_1_6_16 Your_png_h_is_not_version_1_6_16; typedef png_libpng_version_1_6_18 Your_png_h_is_not_version_1_6_18;
/* Tells libpng that we have already handled the first "num_bytes" bytes /* 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 * of the PNG file signature. If the PNG data is embedded into another
@ -34,7 +34,7 @@ png_set_sig_bytes(png_structrp png_ptr, int num_bytes)
if (num_bytes > 8) if (num_bytes > 8)
png_error(png_ptr, "Too many bytes for PNG signature"); png_error(png_ptr, "Too many bytes for PNG signature");
png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes); png_ptr->sig_bytes = (png_byte)((num_bytes < 0 ? 0 : num_bytes) & 0xff);
} }
/* Checks whether the supplied bytes match the PNG signature. We allow /* Checks whether the supplied bytes match the PNG signature. We allow
@ -101,7 +101,7 @@ png_zfree(voidpf png_ptr, voidpf ptr)
void /* PRIVATE */ void /* PRIVATE */
png_reset_crc(png_structrp png_ptr) png_reset_crc(png_structrp png_ptr)
{ {
/* The cast is safe because the crc is a 32 bit value. */ /* The cast is safe because the crc is a 32-bit value. */
png_ptr->crc = (png_uint_32)crc32(0, Z_NULL, 0); png_ptr->crc = (png_uint_32)crc32(0, Z_NULL, 0);
} }
@ -129,7 +129,7 @@ png_calculate_crc(png_structrp png_ptr, png_const_bytep ptr, png_size_t length)
} }
/* 'uLong' is defined in zlib.h as unsigned long; this means that on some /* 'uLong' is defined in zlib.h as unsigned long; this means that on some
* systems it is a 64 bit value. crc32, however, returns 32 bits so the * systems it is a 64-bit value. crc32, however, returns 32 bits so the
* following cast is safe. 'uInt' may be no more than 16 bits, so it is * following cast is safe. 'uInt' may be no more than 16 bits, so it is
* necessary to perform a loop here. * necessary to perform a loop here.
*/ */
@ -140,8 +140,10 @@ png_calculate_crc(png_structrp png_ptr, png_const_bytep ptr, png_size_t length)
do do
{ {
uInt safe_length = (uInt)length; uInt safe_length = (uInt)length;
#ifndef __COVERITY__
if (safe_length == 0) if (safe_length == 0)
safe_length = (uInt)-1; /* evil, but safe */ safe_length = (uInt)-1; /* evil, but safe */
#endif
crc = crc32(crc, ptr, safe_length); crc = crc32(crc, ptr, safe_length);
@ -241,15 +243,15 @@ png_create_png_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
create_struct.user_height_max = PNG_USER_HEIGHT_MAX; create_struct.user_height_max = PNG_USER_HEIGHT_MAX;
# ifdef PNG_USER_CHUNK_CACHE_MAX # ifdef PNG_USER_CHUNK_CACHE_MAX
/* Added at libpng-1.2.43 and 1.4.0 */ /* Added at libpng-1.2.43 and 1.4.0 */
create_struct.user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX; create_struct.user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX;
# endif # endif
# ifdef PNG_USER_CHUNK_MALLOC_MAX # ifdef PNG_USER_CHUNK_MALLOC_MAX
/* Added at libpng-1.2.43 and 1.4.1, required only for read but exists /* Added at libpng-1.2.43 and 1.4.1, required only for read but exists
* in png_struct regardless. * in png_struct regardless.
*/ */
create_struct.user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX; create_struct.user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX;
# endif # endif
# endif # endif
@ -273,7 +275,9 @@ png_create_png_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
# ifdef PNG_SETJMP_SUPPORTED # ifdef PNG_SETJMP_SUPPORTED
if (!setjmp(create_jmp_buf)) if (!setjmp(create_jmp_buf))
# endif
{ {
# ifdef PNG_SETJMP_SUPPORTED
/* Temporarily fake out the longjmp information until we have /* Temporarily fake out the longjmp information until we have
* successfully completed this function. This only works if we have * successfully completed this function. This only works if we have
* setjmp() support compiled in, but it is safe - this stuff should * setjmp() support compiled in, but it is safe - this stuff should
@ -282,8 +286,6 @@ png_create_png_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
create_struct.jmp_buf_ptr = &create_jmp_buf; create_struct.jmp_buf_ptr = &create_jmp_buf;
create_struct.jmp_buf_size = 0; /*stack allocation*/ create_struct.jmp_buf_size = 0; /*stack allocation*/
create_struct.longjmp_fn = longjmp; create_struct.longjmp_fn = longjmp;
# else
{
# endif # endif
/* Call the general version checker (shared with read and write code): /* Call the general version checker (shared with read and write code):
*/ */
@ -302,10 +304,10 @@ png_create_png_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
create_struct.zstream.opaque = png_ptr; create_struct.zstream.opaque = png_ptr;
# ifdef PNG_SETJMP_SUPPORTED # ifdef PNG_SETJMP_SUPPORTED
/* Eliminate the local error handling: */ /* Eliminate the local error handling: */
create_struct.jmp_buf_ptr = NULL; create_struct.jmp_buf_ptr = NULL;
create_struct.jmp_buf_size = 0; create_struct.jmp_buf_size = 0;
create_struct.longjmp_fn = 0; create_struct.longjmp_fn = 0;
# endif # endif
*png_ptr = create_struct; *png_ptr = create_struct;
@ -476,9 +478,10 @@ png_free_data(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 mask,
/* Free any tRNS entry */ /* Free any tRNS entry */
if (((mask & PNG_FREE_TRNS) & info_ptr->free_me) != 0) if (((mask & PNG_FREE_TRNS) & info_ptr->free_me) != 0)
{ {
info_ptr->valid &= ~PNG_INFO_tRNS;
png_free(png_ptr, info_ptr->trans_alpha); png_free(png_ptr, info_ptr->trans_alpha);
info_ptr->trans_alpha = NULL; info_ptr->trans_alpha = NULL;
info_ptr->valid &= ~PNG_INFO_tRNS; info_ptr->num_trans = 0;
} }
#endif #endif
@ -544,20 +547,17 @@ png_free_data(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 mask,
else else
{ {
if (info_ptr->splt_palettes_num != 0) int i;
for (i = 0; i < info_ptr->splt_palettes_num; i++)
{ {
int i; png_free(png_ptr, info_ptr->splt_palettes[i].name);
png_free(png_ptr, info_ptr->splt_palettes[i].entries);
for (i = 0; i < info_ptr->splt_palettes_num; i++)
{
png_free(png_ptr, info_ptr->splt_palettes[i].name);
png_free(png_ptr, info_ptr->splt_palettes[i].entries);
}
png_free(png_ptr, info_ptr->splt_palettes);
info_ptr->splt_palettes = NULL;
info_ptr->splt_palettes_num = 0;
} }
png_free(png_ptr, info_ptr->splt_palettes);
info_ptr->splt_palettes = NULL;
info_ptr->splt_palettes_num = 0;
info_ptr->valid &= ~PNG_INFO_sPLT; info_ptr->valid &= ~PNG_INFO_sPLT;
} }
} }
@ -577,15 +577,12 @@ png_free_data(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 mask,
{ {
int i; int i;
if (info_ptr->unknown_chunks_num != 0) for (i = 0; i < info_ptr->unknown_chunks_num; i++)
{ png_free(png_ptr, info_ptr->unknown_chunks[i].data);
for (i = 0; i < info_ptr->unknown_chunks_num; i++)
png_free(png_ptr, info_ptr->unknown_chunks[i].data);
png_free(png_ptr, info_ptr->unknown_chunks); png_free(png_ptr, info_ptr->unknown_chunks);
info_ptr->unknown_chunks = NULL; info_ptr->unknown_chunks = NULL;
info_ptr->unknown_chunks_num = 0; info_ptr->unknown_chunks_num = 0;
}
} }
} }
#endif #endif
@ -666,7 +663,7 @@ png_init_io(png_structrp png_ptr, png_FILE_p fp)
} }
# endif # endif
#ifdef PNG_SAVE_INT_32_SUPPORTED # ifdef PNG_SAVE_INT_32_SUPPORTED
/* The png_save_int_32 function assumes integers are stored in two's /* The png_save_int_32 function assumes integers are stored in two's
* complement format. If this isn't the case, then this routine needs to * complement format. If this isn't the case, then this routine needs to
* be modified to write data in two's complement format. Note that, * be modified to write data in two's complement format. Note that,
@ -681,7 +678,7 @@ png_save_int_32(png_bytep buf, png_int_32 i)
buf[2] = (png_byte)((i >> 8) & 0xff); buf[2] = (png_byte)((i >> 8) & 0xff);
buf[3] = (png_byte)(i & 0xff); buf[3] = (png_byte)(i & 0xff);
} }
#endif # endif
# ifdef PNG_TIME_RFC1123_SUPPORTED # ifdef PNG_TIME_RFC1123_SUPPORTED
/* Convert the supplied time into an RFC 1123 string suitable for use in /* Convert the supplied time into an RFC 1123 string suitable for use in
@ -734,7 +731,7 @@ png_convert_to_rfc1123_buffer(char out[29], png_const_timep ptime)
return 1; return 1;
} }
# if PNG_LIBPNG_VER < 10700 # if PNG_LIBPNG_VER < 10700
/* To do: remove the following from libpng-1.7 */ /* To do: remove the following from libpng-1.7 */
/* Original API that uses a private buffer in png_struct. /* Original API that uses a private buffer in png_struct.
* Deprecated because it causes png_struct to carry a spurious temporary * Deprecated because it causes png_struct to carry a spurious temporary
@ -755,7 +752,7 @@ png_convert_to_rfc1123(png_structrp png_ptr, png_const_timep ptime)
return NULL; return NULL;
} }
# endif # endif /* LIBPNG_VER < 10700 */
# endif /* TIME_RFC1123 */ # endif /* TIME_RFC1123 */
#endif /* READ || WRITE */ #endif /* READ || WRITE */
@ -769,14 +766,14 @@ png_get_copyright(png_const_structrp png_ptr)
#else #else
# ifdef __STDC__ # ifdef __STDC__
return PNG_STRING_NEWLINE \ return PNG_STRING_NEWLINE \
"libpng version 1.6.16 - December 22, 2014" PNG_STRING_NEWLINE \ "libpng version 1.6.18 - July 23, 2015" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2014 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ "Copyright (c) 1998-2015 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE; PNG_STRING_NEWLINE;
# else # else
return "libpng version 1.6.16 - December 22, 2014\ return "libpng version 1.6.18 - July 23, 2015\
Copyright (c) 1998-2014 Glenn Randers-Pehrson\ Copyright (c) 1998-2015 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\ Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."; Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
# endif # endif
@ -814,9 +811,9 @@ png_get_header_version(png_const_structrp png_ptr)
#ifdef __STDC__ #ifdef __STDC__
return PNG_HEADER_VERSION_STRING return PNG_HEADER_VERSION_STRING
# ifndef PNG_READ_SUPPORTED # ifndef PNG_READ_SUPPORTED
" (NO READ SUPPORT)" " (NO READ SUPPORT)"
# endif # endif
PNG_STRING_NEWLINE; PNG_STRING_NEWLINE;
#else #else
return PNG_HEADER_VERSION_STRING; return PNG_HEADER_VERSION_STRING;
#endif #endif
@ -872,9 +869,9 @@ png_build_grayscale_palette(int bit_depth, png_colorp palette)
for (i = 0, v = 0; i < num_palette; i++, v += color_inc) for (i = 0, v = 0; i < num_palette; i++, v += color_inc)
{ {
palette[i].red = (png_byte)v; palette[i].red = (png_byte)(v & 0xff);
palette[i].green = (png_byte)v; palette[i].green = (png_byte)(v & 0xff);
palette[i].blue = (png_byte)v; palette[i].blue = (png_byte)(v & 0xff);
} }
} }
#endif #endif
@ -947,8 +944,6 @@ png_access_version_number(void)
return((png_uint_32)PNG_LIBPNG_VER); return((png_uint_32)PNG_LIBPNG_VER);
} }
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
/* Ensure that png_ptr->zstream.msg holds some appropriate error message string. /* Ensure that png_ptr->zstream.msg holds some appropriate error message string.
* If it doesn't 'ret' is used to set it to something appropriate, even in cases * If it doesn't 'ret' is used to set it to something appropriate, even in cases
@ -1091,10 +1086,10 @@ png_colorspace_set_gamma(png_const_structrp png_ptr,
errmsg = "gamma value out of range"; errmsg = "gamma value out of range";
# ifdef PNG_READ_gAMA_SUPPORTED # ifdef PNG_READ_gAMA_SUPPORTED
/* Allow the application to set the gamma value more than once */ /* Allow the application to set the gamma value more than once */
else if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 && else if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 &&
(colorspace->flags & PNG_COLORSPACE_FROM_gAMA) != 0) (colorspace->flags & PNG_COLORSPACE_FROM_gAMA) != 0)
errmsg = "duplicate"; errmsg = "duplicate";
# endif # endif
/* Do nothing if the colorspace is already invalid */ /* Do nothing if the colorspace is already invalid */
@ -1135,31 +1130,31 @@ png_colorspace_sync_info(png_const_structrp png_ptr, png_inforp info_ptr)
PNG_INFO_iCCP); PNG_INFO_iCCP);
# ifdef PNG_COLORSPACE_SUPPORTED # ifdef PNG_COLORSPACE_SUPPORTED
/* Clean up the iCCP profile now if it won't be used. */ /* Clean up the iCCP profile now if it won't be used. */
png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, -1/*not used*/); png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, -1/*not used*/);
# else # else
PNG_UNUSED(png_ptr) PNG_UNUSED(png_ptr)
# endif # endif
} }
else else
{ {
# ifdef PNG_COLORSPACE_SUPPORTED # ifdef PNG_COLORSPACE_SUPPORTED
/* Leave the INFO_iCCP flag set if the pngset.c code has already set /* Leave the INFO_iCCP flag set if the pngset.c code has already set
* it; this allows a PNG to contain a profile which matches sRGB and * it; this allows a PNG to contain a profile which matches sRGB and
* yet still have that profile retrievable by the application. * yet still have that profile retrievable by the application.
*/ */
if ((info_ptr->colorspace.flags & PNG_COLORSPACE_MATCHES_sRGB) != 0) if ((info_ptr->colorspace.flags & PNG_COLORSPACE_MATCHES_sRGB) != 0)
info_ptr->valid |= PNG_INFO_sRGB; info_ptr->valid |= PNG_INFO_sRGB;
else else
info_ptr->valid &= ~PNG_INFO_sRGB; info_ptr->valid &= ~PNG_INFO_sRGB;
if ((info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0) if ((info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0)
info_ptr->valid |= PNG_INFO_cHRM; info_ptr->valid |= PNG_INFO_cHRM;
else else
info_ptr->valid &= ~PNG_INFO_cHRM; info_ptr->valid &= ~PNG_INFO_cHRM;
# endif # endif
if ((info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_GAMMA) != 0) if ((info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_GAMMA) != 0)
@ -1181,7 +1176,7 @@ png_colorspace_sync(png_const_structrp png_ptr, png_inforp info_ptr)
png_colorspace_sync_info(png_ptr, info_ptr); png_colorspace_sync_info(png_ptr, info_ptr);
} }
#endif #endif
#endif #endif /* GAMMA */
#ifdef PNG_COLORSPACE_SUPPORTED #ifdef PNG_COLORSPACE_SUPPORTED
/* Added at libpng-1.5.5 to support read and write of true CIEXYZ values for /* Added at libpng-1.5.5 to support read and write of true CIEXYZ values for
@ -1240,16 +1235,17 @@ png_XYZ_from_xy(png_XYZ *XYZ, const png_xy *xy)
/* Check xy and, implicitly, z. Note that wide gamut color spaces typically /* Check xy and, implicitly, z. Note that wide gamut color spaces typically
* have end points with 0 tristimulus values (these are impossible end * have end points with 0 tristimulus values (these are impossible end
* points, but they are used to cover the possible colors.) * points, but they are used to cover the possible colors). We check
* xy->whitey against 5, not 0, to avoid a possible integer overflow.
*/ */
if (xy->redx < 0 || xy->redx > PNG_FP_1) return 1; if (xy->redx < 0 || xy->redx > PNG_FP_1) return 1;
if (xy->redy < 0 || xy->redy > PNG_FP_1-xy->redx) return 1; if (xy->redy < 0 || xy->redy > PNG_FP_1-xy->redx) return 1;
if (xy->greenx < 0 || xy->greenx > PNG_FP_1) return 1; if (xy->greenx < 0 || xy->greenx > PNG_FP_1) return 1;
if (xy->greeny < 0 || xy->greeny > PNG_FP_1-xy->greenx) return 1; if (xy->greeny < 0 || xy->greeny > PNG_FP_1-xy->greenx) return 1;
if (xy->bluex < 0 || xy->bluex > PNG_FP_1) return 1; if (xy->bluex < 0 || xy->bluex > PNG_FP_1) return 1;
if (xy->bluey < 0 || xy->bluey > PNG_FP_1-xy->bluex) return 1; if (xy->bluey < 0 || xy->bluey > PNG_FP_1-xy->bluex) return 1;
if (xy->whitex < 0 || xy->whitex > PNG_FP_1) return 1; if (xy->whitex < 0 || xy->whitex > PNG_FP_1) return 1;
if (xy->whitey < 0 || xy->whitey > PNG_FP_1-xy->whitex) return 1; if (xy->whitey < 5 || xy->whitey > PNG_FP_1-xy->whitex) return 1;
/* The reverse calculation is more difficult because the original tristimulus /* The reverse calculation is more difficult because the original tristimulus
* value had 9 independent values (red,green,blue)x(X,Y,Z) however only 8 * value had 9 independent values (red,green,blue)x(X,Y,Z) however only 8
@ -2166,7 +2162,8 @@ png_icc_check_tag_table(png_const_structrp png_ptr, png_colorspacerp colorspace,
return 1; /* success, maybe with warnings */ return 1; /* success, maybe with warnings */
} }
#if defined(PNG_sRGB_SUPPORTED) && PNG_sRGB_PROFILE_CHECKS >= 0 #ifdef PNG_sRGB_SUPPORTED
#if PNG_sRGB_PROFILE_CHECKS >= 0
/* Information about the known ICC sRGB profiles */ /* Information about the known ICC sRGB profiles */
static const struct static const struct
{ {
@ -2280,7 +2277,7 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
/* Length *and* intent must match */ /* Length *and* intent must match */
if (length == png_sRGB_checks[i].length && if (length == png_sRGB_checks[i].length &&
intent == png_sRGB_checks[i].intent) intent == (png_uint_32) png_sRGB_checks[i].intent)
{ {
/* Now calculate the adler32 if not done already. */ /* Now calculate the adler32 if not done already. */
if (adler == 0) if (adler == 0)
@ -2324,8 +2321,8 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
*/ */
else if (png_sRGB_checks[i].have_md5 == 0) else if (png_sRGB_checks[i].have_md5 == 0)
{ {
png_chunk_report(png_ptr, "out-of-date sRGB profile with" png_chunk_report(png_ptr,
" no signature", "out-of-date sRGB profile with no signature",
PNG_CHUNK_WARNING); PNG_CHUNK_WARNING);
} }
@ -2338,8 +2335,8 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
* way. This probably indicates a data error or uninformed hacking. * way. This probably indicates a data error or uninformed hacking.
* Fall through to "no match". * Fall through to "no match".
*/ */
png_chunk_report(png_ptr, "Not recognizing known sRGB profile that" png_chunk_report(png_ptr,
" has been edited", "Not recognizing known sRGB profile that has been edited",
PNG_CHUNK_WARNING); PNG_CHUNK_WARNING);
break; break;
# endif # endif
@ -2349,9 +2346,8 @@ png_compare_ICC_profile_with_sRGB(png_const_structrp png_ptr,
return 0; /* no match */ return 0; /* no match */
} }
#endif #endif /* PNG_sRGB_PROFILE_CHECKS >= 0 */
#ifdef PNG_sRGB_SUPPORTED
void /* PRIVATE */ void /* PRIVATE */
png_icc_set_sRGB(png_const_structrp png_ptr, png_icc_set_sRGB(png_const_structrp png_ptr,
png_colorspacerp colorspace, png_const_bytep profile, uLong adler) png_colorspacerp colorspace, png_const_bytep profile, uLong adler)
@ -2365,7 +2361,7 @@ png_icc_set_sRGB(png_const_structrp png_ptr,
(void)png_colorspace_set_sRGB(png_ptr, colorspace, (void)png_colorspace_set_sRGB(png_ptr, colorspace,
(int)/*already checked*/png_get_uint_32(profile+64)); (int)/*already checked*/png_get_uint_32(profile+64));
} }
#endif /* READ_sRGB */ #endif /* sRGB */
int /* PRIVATE */ int /* PRIVATE */
png_colorspace_set_ICC(png_const_structrp png_ptr, png_colorspacerp colorspace, png_colorspace_set_ICC(png_const_structrp png_ptr, png_colorspacerp colorspace,
@ -2457,7 +2453,7 @@ png_colorspace_set_rgb_coefficients(png_structrp png_ptr)
png_error(png_ptr, "internal error handling cHRM->XYZ"); png_error(png_ptr, "internal error handling cHRM->XYZ");
} }
} }
#endif #endif /* READ_RGB_TO_GRAY */
#endif /* COLORSPACE */ #endif /* COLORSPACE */
@ -2486,18 +2482,19 @@ png_check_IHDR(png_const_structrp png_ptr,
png_warning(png_ptr, "Image width is zero in IHDR"); png_warning(png_ptr, "Image width is zero in IHDR");
error = 1; error = 1;
} }
else if (width > PNG_UINT_31_MAX)
if (width > PNG_UINT_31_MAX)
{ {
png_warning(png_ptr, "Invalid image width in IHDR"); png_warning(png_ptr, "Invalid image width in IHDR");
error = 1; error = 1;
} }
else if (png_gt(width, if (png_gt(((width + 7) & (~7)),
(PNG_SIZE_MAX >> 3) /* 8-byte RGBA pixels */ ((PNG_SIZE_MAX
- 48 /* big_row_buf hack */ - 48 /* big_row_buf hack */
- 1 /* filter byte */ - 1) /* filter byte */
- 7*8 /* rounding width to multiple of 8 pix */ / 8) /* 8-byte RGBA pixels */
- 8)) /* extra max_pixel_depth pad */ - 1)) /* extra max_pixel_depth pad */
{ {
/* The size of the row must be within the limits of this architecture. /* The size of the row must be within the limits of this architecture.
* Because the read code can perform arbitrary transformations the * Because the read code can perform arbitrary transformations the
@ -2513,17 +2510,15 @@ png_check_IHDR(png_const_structrp png_ptr,
png_warning(png_ptr, "Image width is too large for this architecture"); png_warning(png_ptr, "Image width is too large for this architecture");
error = 1; error = 1;
} }
else
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (width > png_ptr->user_width_max)
#else
if (width > PNG_USER_WIDTH_MAX)
#endif
{ {
# ifdef PNG_SET_USER_LIMITS_SUPPORTED png_warning(png_ptr, "Image width exceeds user limit in IHDR");
if (width > png_ptr->user_width_max) error = 1;
# else
if (width > PNG_USER_WIDTH_MAX)
# endif
{
png_warning(png_ptr, "Image width exceeds user limit in IHDR");
error = 1;
}
} }
if (height == 0) if (height == 0)
@ -2531,22 +2526,21 @@ png_check_IHDR(png_const_structrp png_ptr,
png_warning(png_ptr, "Image height is zero in IHDR"); png_warning(png_ptr, "Image height is zero in IHDR");
error = 1; error = 1;
} }
else if (height > PNG_UINT_31_MAX)
if (height > PNG_UINT_31_MAX)
{ {
png_warning(png_ptr, "Invalid image height in IHDR"); png_warning(png_ptr, "Invalid image height in IHDR");
error = 1; error = 1;
} }
else
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (height > png_ptr->user_height_max)
#else
if (height > PNG_USER_HEIGHT_MAX)
#endif
{ {
# ifdef PNG_SET_USER_LIMITS_SUPPORTED png_warning(png_ptr, "Image height exceeds user limit in IHDR");
if (height > png_ptr->user_height_max) error = 1;
# else
if (height > PNG_USER_HEIGHT_MAX)
# endif
{
png_warning(png_ptr, "Image height exceeds user limit in IHDR");
error = 1;
}
} }
/* Check other values */ /* Check other values */
@ -2585,7 +2579,7 @@ png_check_IHDR(png_const_structrp png_ptr,
error = 1; error = 1;
} }
# ifdef PNG_MNG_FEATURES_SUPPORTED #ifdef PNG_MNG_FEATURES_SUPPORTED
/* Accept filter_method 64 (intrapixel differencing) only if /* Accept filter_method 64 (intrapixel differencing) only if
* 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
* 2. Libpng did not read a PNG signature (this filter_method is only * 2. Libpng did not read a PNG signature (this filter_method is only
@ -2618,13 +2612,13 @@ png_check_IHDR(png_const_structrp png_ptr,
} }
} }
# else #else
if (filter_type != PNG_FILTER_TYPE_BASE) if (filter_type != PNG_FILTER_TYPE_BASE)
{ {
png_warning(png_ptr, "Unknown filter method in IHDR"); png_warning(png_ptr, "Unknown filter method in IHDR");
error = 1; error = 1;
} }
# endif #endif
if (error == 1) if (error == 1)
png_error(png_ptr, "Invalid IHDR data"); png_error(png_ptr, "Invalid IHDR data");
@ -2850,7 +2844,7 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
if (fp >= DBL_MIN && fp <= DBL_MAX) if (fp >= DBL_MIN && fp <= DBL_MAX)
{ {
int exp_b10; /* A base 10 exponent */ int exp_b10; /* A base 10 exponent */
double base; /* 10^exp_b10 */ double base; /* 10^exp_b10 */
/* First extract a base 10 exponent of the number, /* First extract a base 10 exponent of the number,
@ -2898,7 +2892,7 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
*/ */
{ {
int czero, clead, cdigits; unsigned int czero, clead, cdigits;
char exponent[10]; char exponent[10];
/* Allow up to two leading zeros - this will not lengthen /* Allow up to two leading zeros - this will not lengthen
@ -2928,7 +2922,7 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
* of the loop don't break the number into parts so * of the loop don't break the number into parts so
* that the final digit is rounded. * that the final digit is rounded.
*/ */
if (cdigits+czero-clead+1 < (int)precision) if (cdigits+czero+1 < precision+clead)
fp = modf(fp, &d); fp = modf(fp, &d);
else else
@ -3034,14 +3028,14 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
*ascii++ = (char)(48 + (int)d), ++cdigits; *ascii++ = (char)(48 + (int)d), ++cdigits;
} }
} }
while (cdigits+czero-clead < (int)precision && fp > DBL_MIN); while (cdigits+czero < precision+clead && fp > DBL_MIN);
/* The total output count (max) is now 4+precision */ /* The total output count (max) is now 4+precision */
/* Check for an exponent, if we don't need one we are /* Check for an exponent, if we don't need one we are
* done and just need to terminate the string. At * done and just need to terminate the string. At
* this point exp_b10==(-1) is effectively if flag - it got * this point exp_b10==(-1) is effectively if flag - it got
* to '-1' because of the decrement after outputing * to '-1' because of the decrement after outputting
* the decimal point above (the exponent required is * the decimal point above (the exponent required is
* *not* -1!) * *not* -1!)
*/ */
@ -3049,7 +3043,7 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
{ {
/* The following only happens if we didn't output the /* The following only happens if we didn't output the
* leading zeros above for negative exponent, so this * leading zeros above for negative exponent, so this
* doest add to the digit requirement. Note that the * doesn't add to the digit requirement. Note that the
* two zeros here can only be output if the two leading * two zeros here can only be output if the two leading
* zeros were *not* output, so this doesn't increase * zeros were *not* output, so this doesn't increase
* the output count. * the output count.
@ -3102,7 +3096,7 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
/* Need another size check here for the exponent digits, so /* Need another size check here for the exponent digits, so
* this need not be considered above. * this need not be considered above.
*/ */
if ((int)size > cdigits) if (size > cdigits)
{ {
while (cdigits > 0) *ascii++ = exponent[--cdigits]; while (cdigits > 0) *ascii++ = exponent[--cdigits];
@ -3206,7 +3200,7 @@ png_ascii_from_fixed(png_const_structrp png_ptr, png_charp ascii,
png_error(png_ptr, "ASCII conversion buffer too small"); png_error(png_ptr, "ASCII conversion buffer too small");
} }
# endif /* FIXED_POINT */ # endif /* FIXED_POINT */
#endif /* READ_SCAL */ #endif /* SCAL */
#if defined(PNG_FLOATING_POINT_SUPPORTED) && \ #if defined(PNG_FLOATING_POINT_SUPPORTED) && \
!defined(PNG_FIXED_POINT_MACRO_SUPPORTED) && \ !defined(PNG_FIXED_POINT_MACRO_SUPPORTED) && \
@ -3224,7 +3218,7 @@ png_fixed(png_const_structrp png_ptr, double fp, png_const_charp text)
png_fixed_error(png_ptr, text); png_fixed_error(png_ptr, text);
# ifndef PNG_ERROR_TEXT_SUPPORTED # ifndef PNG_ERROR_TEXT_SUPPORTED
PNG_UNUSED(text) PNG_UNUSED(text)
# endif # endif
return (png_fixed_point)r; return (png_fixed_point)r;
@ -3405,29 +3399,29 @@ png_gamma_significant(png_fixed_point gamma_val)
#endif #endif
#ifdef PNG_READ_GAMMA_SUPPORTED #ifdef PNG_READ_GAMMA_SUPPORTED
#if defined(PNG_16BIT_SUPPORTED) || !defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) #ifdef PNG_16BIT_SUPPORTED
/* A local convenience routine. */ /* A local convenience routine. */
static png_fixed_point static png_fixed_point
png_product2(png_fixed_point a, png_fixed_point b) png_product2(png_fixed_point a, png_fixed_point b)
{ {
/* The required result is 1/a * 1/b; the following preserves accuracy. */ /* 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; double r = a * 1E-5;
r *= b; r *= b;
r = floor(r+.5); r = floor(r+.5);
if (r <= 2147483647. && r >= -2147483648.) if (r <= 2147483647. && r >= -2147483648.)
return (png_fixed_point)r; return (png_fixed_point)r;
# else #else
png_fixed_point res; png_fixed_point res;
if (png_muldiv(&res, a, b, 100000) != 0) if (png_muldiv(&res, a, b, 100000) != 0)
return res; return res;
# endif #endif
return 0; /* overflow */ return 0; /* overflow */
} }
#endif /* 16BIT || !FLOATING_ARITHMETIC */ #endif /* 16BIT */
/* The inverse of the above. */ /* The inverse of the above. */
png_fixed_point png_fixed_point
@ -3435,12 +3429,15 @@ png_reciprocal2(png_fixed_point a, png_fixed_point b)
{ {
/* The required result is 1/a * 1/b; the following preserves accuracy. */ /* The required result is 1/a * 1/b; the following preserves accuracy. */
#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED #ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
double r = 1E15/a; if (a != 0 && b != 0)
r /= b; {
r = floor(r+.5); double r = 1E15/a;
r /= b;
r = floor(r+.5);
if (r <= 2147483647. && r >= -2147483648.) if (r <= 2147483647. && r >= -2147483648.)
return (png_fixed_point)r; return (png_fixed_point)r;
}
#else #else
/* This may overflow because the range of png_fixed_point isn't symmetric, /* This may overflow because the range of png_fixed_point isn't symmetric,
* but this API is only used for the product of file and screen gamma so it * but this API is only used for the product of file and screen gamma so it
@ -3731,7 +3728,7 @@ png_exp8bit(png_fixed_point lg2)
* step. * step.
*/ */
x -= x >> 8; x -= x >> 8;
return (png_byte)((x + 0x7fffffU) >> 24); return (png_byte)(((x + 0x7fffffU) >> 24) & 0xff);
} }
#ifdef PNG_16BIT_SUPPORTED #ifdef PNG_16BIT_SUPPORTED
@ -3792,7 +3789,7 @@ png_gamma_8bit_correct(unsigned int value, png_fixed_point gamma_val)
# endif # endif
} }
return (png_byte)value; return (png_byte)(value & 0xff);
} }
#ifdef PNG_16BIT_SUPPORTED #ifdef PNG_16BIT_SUPPORTED
@ -4014,7 +4011,7 @@ png_build_8bit_table(png_structrp png_ptr, png_bytepp ptable,
else else
for (i=0; i<256; ++i) for (i=0; i<256; ++i)
table[i] = (png_byte)i; table[i] = (png_byte)(i & 0xff);
} }
/* Used from png_read_destroy and below to release the memory used by the gamma /* Used from png_read_destroy and below to release the memory used by the gamma
@ -4154,7 +4151,8 @@ png_build_gamma_table(png_structrp png_ptr, int bit_depth)
* *
*/ */
if (sig_bit > 0 && sig_bit < 16U) if (sig_bit > 0 && sig_bit < 16U)
shift = (png_byte)(16U - sig_bit); /* shift == insignificant bits */ /* shift == insignificant bits */
shift = (png_byte)((16U - sig_bit) & 0xff);
else else
shift = 0; /* keep all 16 bits */ shift = 0; /* keep all 16 bits */
@ -4223,7 +4221,7 @@ png_set_option(png_structrp png_ptr, int option, int onoff)
int setting = (2 + (onoff != 0)) << option; int setting = (2 + (onoff != 0)) << option;
int current = png_ptr->options; int current = png_ptr->options;
png_ptr->options = (png_byte)((current & ~mask) | setting); png_ptr->options = (png_byte)(((current & ~mask) | setting) & 0xff);
return (current & mask) >> option; return (current & mask) >> option;
} }
@ -4239,7 +4237,7 @@ png_set_option(png_structrp png_ptr, int option, int onoff)
* contrib/tools/makesRGB.c. The actual sRGB transfer curve defined in the * contrib/tools/makesRGB.c. The actual sRGB transfer curve defined in the
* specification (see the article at http://en.wikipedia.org/wiki/SRGB) * specification (see the article at http://en.wikipedia.org/wiki/SRGB)
* is used, not the gamma=1/2.2 approximation use elsewhere in libpng. * is used, not the gamma=1/2.2 approximation use elsewhere in libpng.
* The sRGB to linear table is exact (to the nearest 16 bit linear fraction). * The sRGB to linear table is exact (to the nearest 16-bit linear fraction).
* The inverse (linear to sRGB) table has accuracies as follows: * The inverse (linear to sRGB) table has accuracies as follows:
* *
* For all possible (255*65535+1) input values: * For all possible (255*65535+1) input values:

143
GRRLIB/lib/png/png.h
View file

@ -1,8 +1,9 @@
/* png.h - header file for PNG reference library /* png.h - header file for PNG reference library
* *
* libpng version 1.6.16, December 22, 2014 * libpng version 1.6.18, July 23, 2015
* Copyright (c) 1998-2014 Glenn Randers-Pehrson *
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -10,8 +11,8 @@
* *
* Authors and maintainers: * Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger * libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.6.16, December 22, 2014: Glenn * libpng versions 0.97, January 1998, through 1.6.18, July 23, 2015: Glenn
* See also "Contributing Authors", below. * See also "Contributing Authors", below.
* *
* Note about libpng version numbers: * Note about libpng version numbers:
@ -212,6 +213,12 @@
* 1.6.16beta01-03 16 10616 16.so.16.16[.0] * 1.6.16beta01-03 16 10616 16.so.16.16[.0]
* 1.6.16rc01-02 16 10616 16.so.16.16[.0] * 1.6.16rc01-02 16 10616 16.so.16.16[.0]
* 1.6.16 16 10616 16.so.16.16[.0] * 1.6.16 16 10616 16.so.16.16[.0]
* 1.6.17beta01-06 16 10617 16.so.16.17[.0]
* 1.6.17rc01-06 16 10617 16.so.16.17[.0]
* 1.6.17 16 10617 16.so.16.17[.0]
* 1.6.18beta01-09 16 10618 16.so.16.18[.0]
* 1.6.18rc01-03 16 10618 16.so.16.18[.0]
* 1.6.18 16 10618 16.so.16.18[.0]
* *
* Henceforth the source version will match the shared-library major * Henceforth the source version will match the shared-library major
* and minor numbers; the shared-library major version number will be * and minor numbers; the shared-library major version number will be
@ -243,21 +250,16 @@
* *
* This code is released under the libpng license. * This code is released under the libpng license.
* *
* libpng versions 1.2.6, August 15, 2004, through 1.6.16, December 22, 2014, are * libpng versions 1.0.7, July 1, 2000, through 1.6.18, July 23, 2015, are
* Copyright (c) 2004, 2006-2014 Glenn Randers-Pehrson, and are * Copyright (c) 2000-2002, 2004, 2006-2015 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:
*
* Cosmin Truta
*
* libpng versions 1.0.7, July 1, 2000, through 1.2.5, October 3, 2002, are
* Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
* distributed according to the same disclaimer and license as libpng-1.0.6 * distributed according to the same disclaimer and license as libpng-1.0.6
* with the following individuals added to the list of Contributing Authors: * with the following individuals added to the list of Contributing Authors:
* *
* Simon-Pierre Cadieux * Simon-Pierre Cadieux
* Eric S. Raymond * Mans Rullgard
* Cosmin Truta
* Gilles Vollant * Gilles Vollant
* James Yu
* *
* and with the following additions to the disclaimer: * and with the following additions to the disclaimer:
* *
@ -269,17 +271,18 @@
* the user. * the user.
* *
* libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
* Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are * Copyright (c) 1998-2000 Glenn Randers-Pehrson, and are distributed according
* distributed according to the same disclaimer and license as libpng-0.96, * to the same disclaimer and license as libpng-0.96, with the following
* with the following individuals added to the list of Contributing Authors: * individuals added to the list of Contributing Authors:
* *
* Tom Lane * Tom Lane
* Glenn Randers-Pehrson * Glenn Randers-Pehrson
* Eric S. Raymond
* Willem van Schaik * Willem van Schaik
* *
* libpng versions 0.89, June 1996, through 0.96, May 1997, are * libpng versions 0.89, June 1996, through 0.96, May 1997, are
* Copyright (c) 1996, 1997 Andreas Dilger * Copyright (c) 1996-1997 Andreas Dilger, and are
* Distributed according to the same disclaimer and license as libpng-0.88, * distributed according to the same disclaimer and license as libpng-0.88,
* with the following individuals added to the list of Contributing Authors: * with the following individuals added to the list of Contributing Authors:
* *
* John Bowler * John Bowler
@ -290,7 +293,7 @@
* Tom Tanner * Tom Tanner
* *
* libpng versions 0.5, May 1995, through 0.88, January 1996, are * libpng versions 0.5, May 1995, through 0.88, January 1996, are
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
* *
* For the purposes of this copyright and license, "Contributing Authors" * For the purposes of this copyright and license, "Contributing Authors"
* is defined as the following set of individuals: * is defined as the following set of individuals:
@ -318,8 +321,8 @@
* 2. Altered versions must be plainly marked as such and must not * 2. Altered versions must be plainly marked as such and must not
* be misrepresented as being the original source. * be misrepresented as being the original source.
* *
* 3. This Copyright notice may not be removed or altered from * 3. This Copyright notice may not be removed or altered from any
* any source or altered source distribution. * source or altered source distribution.
* *
* The Contributing Authors and Group 42, Inc. specifically permit, without * The Contributing Authors and Group 42, Inc. specifically permit, without
* fee, and encourage the use of this source code as a component to * fee, and encourage the use of this source code as a component to
@ -332,15 +335,16 @@
* A "png_get_copyright" function is available, for convenient use in "about" * A "png_get_copyright" function is available, for convenient use in "about"
* boxes and the like: * boxes and the like:
* *
* printf("%s", png_get_copyright(NULL)); * printf("%s", png_get_copyright(NULL));
* *
* Also, the PNG logo (in PNG format, of course) is supplied in the * Also, the PNG logo (in PNG format, of course) is supplied in the
* files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
*/ */
/* /*
* Libpng is OSI Certified Open Source Software. OSI Certified is a * Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
* certification mark of the Open Source Initiative. * a certification mark of the Open Source Initiative. OSI has not addressed
* the additional disclaimers inserted at version 1.0.7.
*/ */
/* /*
@ -355,13 +359,13 @@
* Y2K compliance in libpng: * Y2K compliance in libpng:
* ========================= * =========================
* *
* December 22, 2014 * July 23, 2015
* *
* Since the PNG Development group is an ad-hoc body, we can't make * Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration. * an official declaration.
* *
* This is your unofficial assurance that libpng from version 0.71 and * This is your unofficial assurance that libpng from version 0.71 and
* upward through 1.6.16 are Y2K compliant. It is my belief that * upward through 1.6.18 are Y2K compliant. It is my belief that
* earlier versions were also Y2K compliant. * earlier versions were also Y2K compliant.
* *
* Libpng only has two year fields. One is a 2-byte unsigned integer * Libpng only has two year fields. One is a 2-byte unsigned integer
@ -423,9 +427,9 @@
*/ */
/* Version information for png.h - this should match the version in png.c */ /* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.6.16" #define PNG_LIBPNG_VER_STRING "1.6.18"
#define PNG_HEADER_VERSION_STRING \ #define PNG_HEADER_VERSION_STRING \
" libpng version 1.6.16 - December 22, 2014\n" " libpng version 1.6.18 - July 23, 2015\n"
#define PNG_LIBPNG_VER_SONUM 16 #define PNG_LIBPNG_VER_SONUM 16
#define PNG_LIBPNG_VER_DLLNUM 16 #define PNG_LIBPNG_VER_DLLNUM 16
@ -433,7 +437,7 @@
/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */ /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
#define PNG_LIBPNG_VER_MAJOR 1 #define PNG_LIBPNG_VER_MAJOR 1
#define PNG_LIBPNG_VER_MINOR 6 #define PNG_LIBPNG_VER_MINOR 6
#define PNG_LIBPNG_VER_RELEASE 16 #define PNG_LIBPNG_VER_RELEASE 18
/* This should match the numeric part of the final component of /* This should match the numeric part of the final component of
* PNG_LIBPNG_VER_STRING, omitting any leading zero: * PNG_LIBPNG_VER_STRING, omitting any leading zero:
@ -464,7 +468,7 @@
* version 1.0.0 was mis-numbered 100 instead of 10000). From * 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 * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
*/ */
#define PNG_LIBPNG_VER 10616 /* 1.6.16 */ #define PNG_LIBPNG_VER 10618 /* 1.6.18 */
/* Library configuration: these options cannot be changed after /* Library configuration: these options cannot be changed after
* the library has been built. * the library has been built.
@ -569,7 +573,7 @@ extern "C" {
/* This triggers a compiler error in png.c, if png.c and png.h /* This triggers a compiler error in png.c, if png.c and png.h
* do not agree upon the version number. * do not agree upon the version number.
*/ */
typedef char* png_libpng_version_1_6_16; typedef char* png_libpng_version_1_6_18;
/* Basic control structions. Read libpng-manual.txt or libpng.3 for more info. /* Basic control structions. Read libpng-manual.txt or libpng.3 for more info.
* *
@ -1578,6 +1582,7 @@ PNG_EXPORT(66, void, png_set_crc_action, (png_structrp png_ptr, int crit_action,
#define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ #define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */
#define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ #define PNG_CRC_NO_CHANGE 5 /* use current value use current value */
#ifdef PNG_WRITE_SUPPORTED
/* These functions give the user control over the scan-line filtering in /* These functions give the user control over the scan-line filtering in
* libpng and the compression methods used by zlib. These functions are * libpng and the compression methods used by zlib. These functions are
* mainly useful for testing, as the defaults should work with most users. * mainly useful for testing, as the defaults should work with most users.
@ -1591,6 +1596,7 @@ PNG_EXPORT(66, void, png_set_crc_action, (png_structrp png_ptr, int crit_action,
*/ */
PNG_EXPORT(67, void, png_set_filter, (png_structrp png_ptr, int method, PNG_EXPORT(67, void, png_set_filter, (png_structrp png_ptr, int method,
int filters)); int filters));
#endif /* WRITE */
/* Flags for png_set_filter() to say which filters to use. The flags /* Flags for png_set_filter() to say which filters to use. The flags
* are chosen so that they don't conflict with real filter types * are chosen so that they don't conflict with real filter types
@ -1616,35 +1622,8 @@ PNG_EXPORT(67, void, png_set_filter, (png_structrp png_ptr, int method,
#define PNG_FILTER_VALUE_PAETH 4 #define PNG_FILTER_VALUE_PAETH 4
#define PNG_FILTER_VALUE_LAST 5 #define PNG_FILTER_VALUE_LAST 5
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */ #ifdef PNG_WRITE_SUPPORTED
/* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* DEPRECATED */
* defines, either the default (minimum-sum-of-absolute-differences), or
* the experimental method (weighted-minimum-sum-of-absolute-differences).
*
* Weights are factors >= 1.0, indicating how important it is to keep the
* filter type consistent between rows. Larger numbers mean the current
* filter is that many times as likely to be the same as the "num_weights"
* previous filters. This is cumulative for each previous row with a weight.
* There needs to be "num_weights" values in "filter_weights", or it can be
* NULL if the weights aren't being specified. Weights have no influence on
* the selection of the first row filter. Well chosen weights can (in theory)
* improve the compression for a given image.
*
* Costs are factors >= 1.0 indicating the relative decoding costs of a
* filter type. Higher costs indicate more decoding expense, and are
* therefore less likely to be selected over a filter with lower computational
* costs. There needs to be a value in "filter_costs" for each valid filter
* type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't
* setting the costs. Costs try to improve the speed of decompression without
* unduly increasing the compressed image size.
*
* A negative weight or cost indicates the default value is to be used, and
* values in the range [0.0, 1.0) indicate the value is to remain unchanged.
* The default values for both weights and costs are currently 1.0, but may
* change if good general weighting/cost heuristics can be found. If both
* the weights and costs are set to 1.0, this degenerates the WEIGHTED method
* to the UNWEIGHTED method, but with added encoding time/computation.
*/
PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structrp png_ptr, PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structrp png_ptr,
int heuristic_method, int num_weights, png_const_doublep filter_weights, int heuristic_method, int num_weights, png_const_doublep filter_weights,
png_const_doublep filter_costs)) png_const_doublep filter_costs))
@ -1654,15 +1633,12 @@ PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed,
png_const_fixed_point_p filter_costs)) png_const_fixed_point_p filter_costs))
#endif /* WRITE_WEIGHTED_FILTER */ #endif /* WRITE_WEIGHTED_FILTER */
/* Heuristic used for row filter selection. These defines should NOT be /* The following are no longer used and will be removed from libpng-1.7: */
* changed.
*/
#define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ #define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */
#define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ #define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */
#define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */
#define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */
#ifdef PNG_WRITE_SUPPORTED
/* Set the library compression level. Currently, valid values range from /* Set the library compression level. Currently, valid values range from
* 0 - 9, corresponding directly to the zlib compression levels 0 - 9 * 0 - 9, corresponding directly to the zlib compression levels 0 - 9
* (0 - no compression, 9 - "maximal" compression). Note that tests have * (0 - no compression, 9 - "maximal" compression). Note that tests have
@ -1670,6 +1646,7 @@ PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed,
* for PNG images, and do considerably fewer caclulations. In the future, * for PNG images, and do considerably fewer caclulations. In the future,
* these values may not correspond directly to the zlib compression levels. * these values may not correspond directly to the zlib compression levels.
*/ */
#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
PNG_EXPORT(69, void, png_set_compression_level, (png_structrp png_ptr, PNG_EXPORT(69, void, png_set_compression_level, (png_structrp png_ptr,
int level)); int level));
@ -1687,7 +1664,7 @@ PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structrp png_ptr,
PNG_EXPORT(73, void, png_set_compression_method, (png_structrp png_ptr, PNG_EXPORT(73, void, png_set_compression_method, (png_structrp png_ptr,
int method)); int method));
#endif #endif /* WRITE_CUSTOMIZE_COMPRESSION */
#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
/* Also set zlib parameters for compressing non-IDAT chunks */ /* Also set zlib parameters for compressing non-IDAT chunks */
@ -1709,6 +1686,7 @@ PNG_EXPORT(225, void, png_set_text_compression_window_bits,
PNG_EXPORT(226, void, png_set_text_compression_method, (png_structrp png_ptr, PNG_EXPORT(226, void, png_set_text_compression_method, (png_structrp png_ptr,
int method)); int method));
#endif /* WRITE_CUSTOMIZE_ZTXT_COMPRESSION */ #endif /* WRITE_CUSTOMIZE_ZTXT_COMPRESSION */
#endif /* WRITE */
/* These next functions are called for input/output, memory, and error /* These next functions are called for input/output, memory, and error
* handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c,
@ -1819,7 +1797,7 @@ PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structrp));
* *
* The integer return from the callback function is interpreted thus: * The integer return from the callback function is interpreted thus:
* *
* negative: An error occured, png_chunk_error will be called. * negative: An error occurred; png_chunk_error will be called.
* zero: The chunk was not handled, the chunk will be saved. A critical * zero: The chunk was not handled, the chunk will be saved. A critical
* chunk will cause an error at this point unless it is to be saved. * chunk will cause an error at this point unless it is to be saved.
* positive: The chunk was handled, libpng will ignore/discard it. * positive: The chunk was handled, libpng will ignore/discard it.
@ -2664,26 +2642,28 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type,
* (png_uint_16)(alpha) \ * (png_uint_16)(alpha) \
+ (png_uint_16)(bg)*(png_uint_16)(255 \ + (png_uint_16)(bg)*(png_uint_16)(255 \
- (png_uint_16)(alpha)) + 128); \ - (png_uint_16)(alpha)) + 128); \
(composite) = (png_byte)((temp + (temp >> 8)) >> 8); } (composite) = (png_byte)(((temp + (temp >> 8)) >> 8) & 0xff); }
# define png_composite_16(composite, fg, alpha, bg) \ # define png_composite_16(composite, fg, alpha, bg) \
{ png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \
* (png_uint_32)(alpha) \ * (png_uint_32)(alpha) \
+ (png_uint_32)(bg)*(65535 \ + (png_uint_32)(bg)*(65535 \
- (png_uint_32)(alpha)) + 32768); \ - (png_uint_32)(alpha)) + 32768); \
(composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } (composite) = (png_uint_16)(0xffff & ((temp + (temp >> 16)) >> 16)); }
#else /* Standard method using integer division */ #else /* Standard method using integer division */
# define png_composite(composite, fg, alpha, bg) \ # define png_composite(composite, fg, alpha, bg) \
(composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ (composite) = \
(png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ (png_byte)(0xff & (((png_uint_16)(fg) * (png_uint_16)(alpha) + \
127) / 255) (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
127) / 255))
# define png_composite_16(composite, fg, alpha, bg) \ # define png_composite_16(composite, fg, alpha, bg) \
(composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ (composite) = \
(png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \ (png_uint_16)(0xffff & (((png_uint_32)(fg) * (png_uint_32)(alpha) + \
32767) / 65535) (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \
32767) / 65535))
#endif /* READ_COMPOSITE_NODIV */ #endif /* READ_COMPOSITE_NODIV */
#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED #ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED
@ -2773,8 +2753,9 @@ PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i));
* *
* To read a PNG file using the simplified API: * To read a PNG file using the simplified API:
* *
* 1) Declare a 'png_image' structure (see below) on the stack and set the * 1) Declare a 'png_image' structure (see below) on the stack, set the
* version field to PNG_IMAGE_VERSION. * version field to PNG_IMAGE_VERSION and the 'opaque' pointer to NULL
* (this is REQUIRED, your program may crash if you don't do it.)
* 2) Call the appropriate png_image_begin_read... function. * 2) Call the appropriate png_image_begin_read... function.
* 3) Set the png_image 'format' member to the required sample format. * 3) Set the png_image 'format' member to the required sample format.
* 4) Allocate a buffer for the image and, if required, the color-map. * 4) Allocate a buffer for the image and, if required, the color-map.
@ -3199,9 +3180,11 @@ PNG_EXPORT(240, int, png_image_write_to_stdio, (png_imagep image, FILE *file,
* *
* With all APIs row_stride is handled as in the read APIs - it is the spacing * With all APIs row_stride is handled as in the read APIs - it is the spacing
* from one row to the next in component sized units (1 or 2 bytes) and if * from one row to the next in component sized units (1 or 2 bytes) and if
* negative indicates a bottom-up row layout in the buffer. * negative indicates a bottom-up row layout in the buffer. If row_stride is zero,
* libpng will calculate it for you from the image width and number of channels.
* *
* Note that the write API does not support interlacing or sub-8-bit pixels. * Note that the write API does not support interlacing, sub-8-bit pixels, indexed
* PNG (color_type 3) or most ancillary chunks.
*/ */
#endif /* STDIO */ #endif /* STDIO */
#endif /* SIMPLIFIED_WRITE */ #endif /* SIMPLIFIED_WRITE */

38
GRRLIB/lib/png/pngconf.h
View file

@ -1,9 +1,9 @@
/* pngconf.h - machine configurable file for libpng /* pngconf.h - machine configurable file for libpng
* *
* libpng version 1.6.16,December 22, 2014 * libpng version 1.6.18, July 23, 2015
* *
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -11,9 +11,7 @@
* For conditions of distribution and use, see the disclaimer * For conditions of distribution and use, see the disclaimer
* and license in png.h * and license in png.h
* *
*/ * Any machine specific code is near the front of this file, so if you
/* Any machine specific code is near the front of this file, so if you
* are configuring libpng for a machine, you may want to read the section * are configuring libpng for a machine, you may want to read the section
* starting here down to where it starts to typedef png_color, png_text, * starting here down to where it starts to typedef png_color, png_text,
* and png_info. * and png_info.
@ -22,26 +20,6 @@
#ifndef PNGCONF_H #ifndef PNGCONF_H
#define PNGCONF_H #define PNGCONF_H
/* To do: Do all of this in scripts/pnglibconf.dfa */
#ifdef PNG_SAFE_LIMITS_SUPPORTED
# ifdef PNG_USER_WIDTH_MAX
# undef PNG_USER_WIDTH_MAX
# define PNG_USER_WIDTH_MAX 1000000L
# endif
# ifdef PNG_USER_HEIGHT_MAX
# undef PNG_USER_HEIGHT_MAX
# define PNG_USER_HEIGHT_MAX 1000000L
# endif
# ifdef PNG_USER_CHUNK_MALLOC_MAX
# undef PNG_USER_CHUNK_MALLOC_MAX
# define PNG_USER_CHUNK_MALLOC_MAX 4000000L
# endif
# ifdef PNG_USER_CHUNK_CACHE_MAX
# undef PNG_USER_CHUNK_CACHE_MAX
# define PNG_USER_CHUNK_CACHE_MAX 128
# endif
#endif
#ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */ #ifndef PNG_BUILDING_SYMBOL_TABLE /* else includes may cause problems */
/* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C /* From libpng 1.6.0 libpng requires an ANSI X3.159-1989 ("ISOC90") compliant C
@ -317,11 +295,11 @@
* table entries, so we discard it here. See the .dfn files in the * table entries, so we discard it here. See the .dfn files in the
* scripts directory. * scripts directory.
*/ */
#ifndef PNG_EXPORTA
# define PNG_EXPORTA(ordinal, type, name, args, attributes)\ #ifndef PNG_EXPORTA
PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \ # define PNG_EXPORTA(ordinal, type, name, args, attributes) \
extern attributes) PNG_FUNCTION(PNG_EXPORT_TYPE(type), (PNGAPI name), PNGARG(args), \
PNG_LINKAGE_API attributes)
#endif #endif
/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, /* ANSI-C (C90) does not permit a macro to be invoked with an empty argument,
@ -329,7 +307,7 @@
*/ */
#define PNG_EMPTY /*empty list*/ #define PNG_EMPTY /*empty list*/
#define PNG_EXPORT(ordinal, type, name, args)\ #define PNG_EXPORT(ordinal, type, name, args) \
PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY)
/* Use PNG_REMOVED to comment out a removed interface. */ /* Use PNG_REMOVED to comment out a removed interface. */

3
GRRLIB/lib/png/pngdebug.h
View file

@ -1,12 +1,11 @@
/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c /* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
* *
* Last changed in libpng 1.6.8 [December 19, 2013]
* Copyright (c) 1998-2013 Glenn Randers-Pehrson * Copyright (c) 1998-2013 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
* Last changed in libpng 1.6.8 [December 19, 2013]
*
* This code is released under the libpng license. * This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer * For conditions of distribution and use, see the disclaimer
* and license in png.h * and license in png.h

36
GRRLIB/lib/png/pngget.c
View file

@ -1,8 +1,8 @@
/* pngget.c - retrieval of values from info struct /* pngget.c - retrieval of values from info struct
* *
* Last changed in libpng 1.6.15 [November 20, 2014] * Last changed in libpng 1.6.17 [March 26, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -799,14 +799,20 @@ png_get_IHDR(png_const_structrp png_ptr, png_const_inforp info_ptr,
{ {
png_debug1(1, "in %s retrieval function", "IHDR"); png_debug1(1, "in %s retrieval function", "IHDR");
if (png_ptr == NULL || info_ptr == NULL || width == NULL || if (png_ptr == NULL || info_ptr == NULL)
height == NULL || bit_depth == NULL || color_type == NULL)
return (0); return (0);
*width = info_ptr->width; if (width != NULL)
*height = info_ptr->height; *width = info_ptr->width;
*bit_depth = info_ptr->bit_depth;
*color_type = info_ptr->color_type; if (height != NULL)
*height = info_ptr->height;
if (bit_depth != NULL)
*bit_depth = info_ptr->bit_depth;
if (color_type != NULL)
*color_type = info_ptr->color_type;
if (compression_type != NULL) if (compression_type != NULL)
*compression_type = info_ptr->compression_type; *compression_type = info_ptr->compression_type;
@ -1135,21 +1141,21 @@ png_get_compression_buffer_size(png_const_structrp png_ptr)
if (png_ptr == NULL) if (png_ptr == NULL)
return 0; return 0;
# ifdef PNG_WRITE_SUPPORTED #ifdef PNG_WRITE_SUPPORTED
if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0)
# endif #endif
{ {
# ifdef PNG_SEQUENTIAL_READ_SUPPORTED #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
return png_ptr->IDAT_read_size; return png_ptr->IDAT_read_size;
# else #else
return PNG_IDAT_READ_SIZE; return PNG_IDAT_READ_SIZE;
# endif #endif
} }
# ifdef PNG_WRITE_SUPPORTED #ifdef PNG_WRITE_SUPPORTED
else else
return png_ptr->zbuffer_size; return png_ptr->zbuffer_size;
# endif #endif
} }
#ifdef PNG_SET_USER_LIMITS_SUPPORTED #ifdef PNG_SET_USER_LIMITS_SUPPORTED

3
GRRLIB/lib/png/pnginfo.h
View file

@ -1,12 +1,11 @@
/* pnginfo.h - header file for PNG reference library /* pnginfo.h - header file for PNG reference library
* *
* Last changed in libpng 1.6.1 [March 28, 2013]
* Copyright (c) 1998-2013 Glenn Randers-Pehrson * Copyright (c) 1998-2013 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
* Last changed in libpng 1.6.1 [March 28, 2013]
*
* This code is released under the libpng license. * This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer * For conditions of distribution and use, see the disclaimer
* and license in png.h * and license in png.h

17
GRRLIB/lib/png/pnglibconf.h
View file

@ -1,8 +1,8 @@
/* pnglibconf.h - library build configuration */ /* pnglibconf.h - library build configuration */
/* libpng version 1.6.8 - December 19, 2013 */ /* libpng version 1.6.18, July 23, 2015 */
/* Copyright (c) 1998-2012 Glenn Randers-Pehrson */ /* Copyright (c) 1998-2014 Glenn Randers-Pehrson */
/* This code is released under the libpng license. */ /* This code is released under the libpng license. */
/* For conditions of distribution and use, see the disclaimer */ /* For conditions of distribution and use, see the disclaimer */
@ -95,13 +95,10 @@
#define PNG_READ_tIME_SUPPORTED #define PNG_READ_tIME_SUPPORTED
#define PNG_READ_tRNS_SUPPORTED #define PNG_READ_tRNS_SUPPORTED
#define PNG_READ_zTXt_SUPPORTED #define PNG_READ_zTXt_SUPPORTED
/*#undef PNG_SAFE_LIMITS_SUPPORTED*/
#define PNG_SAVE_INT_32_SUPPORTED #define PNG_SAVE_INT_32_SUPPORTED
#define PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED #define PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_SEQUENTIAL_READ_SUPPORTED #define PNG_SEQUENTIAL_READ_SUPPORTED
#define PNG_SETJMP_SUPPORTED #define PNG_SETJMP_SUPPORTED
#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
#define PNG_SET_OPTION_SUPPORTED #define PNG_SET_OPTION_SUPPORTED
#define PNG_SET_UNKNOWN_CHUNKS_SUPPORTED #define PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_SET_USER_LIMITS_SUPPORTED #define PNG_SET_USER_LIMITS_SUPPORTED
@ -127,6 +124,7 @@
#define PNG_WRITE_BGR_SUPPORTED #define PNG_WRITE_BGR_SUPPORTED
#define PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED #define PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED
#define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED #define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED
#define PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
#define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED #define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
#define PNG_WRITE_FILLER_SUPPORTED #define PNG_WRITE_FILLER_SUPPORTED
#define PNG_WRITE_FILTER_SUPPORTED #define PNG_WRITE_FILTER_SUPPORTED
@ -185,18 +183,25 @@
/* end of options */ /* end of options */
/* settings */ /* settings */
#define PNG_API_RULE 0 #define PNG_API_RULE 0
#define PNG_CALLOC_SUPPORTED
#define PNG_COST_SHIFT 3 #define PNG_COST_SHIFT 3
#define PNG_DEFAULT_READ_MACROS 1 #define PNG_DEFAULT_READ_MACROS 1
#define PNG_GAMMA_THRESHOLD_FIXED 5000 #define PNG_GAMMA_THRESHOLD_FIXED 5000
#define PNG_IDAT_READ_SIZE PNG_ZBUF_SIZE #define PNG_IDAT_READ_SIZE PNG_ZBUF_SIZE
#define PNG_INFLATE_BUF_SIZE 1024 #define PNG_INFLATE_BUF_SIZE 1024
#define PNG_LINKAGE_API extern
#define PNG_LINKAGE_CALLBACK extern
#define PNG_LINKAGE_DATA extern
#define PNG_LINKAGE_FUNCTION extern
#define PNG_MAX_GAMMA_8 11 #define PNG_MAX_GAMMA_8 11
#define PNG_QUANTIZE_BLUE_BITS 5 #define PNG_QUANTIZE_BLUE_BITS 5
#define PNG_QUANTIZE_GREEN_BITS 5 #define PNG_QUANTIZE_GREEN_BITS 5
#define PNG_QUANTIZE_RED_BITS 5 #define PNG_QUANTIZE_RED_BITS 5
#define PNG_TEXT_Z_DEFAULT_COMPRESSION (-1) #define PNG_TEXT_Z_DEFAULT_COMPRESSION (-1)
#define PNG_TEXT_Z_DEFAULT_STRATEGY 0 #define PNG_TEXT_Z_DEFAULT_STRATEGY 0
#define PNG_USER_CHUNK_CACHE_MAX 1000
#define PNG_USER_CHUNK_MALLOC_MAX 8000000
#define PNG_USER_HEIGHT_MAX 1000000
#define PNG_USER_WIDTH_MAX 1000000
#define PNG_WEIGHT_SHIFT 8 #define PNG_WEIGHT_SHIFT 8
#define PNG_ZBUF_SIZE 8192 #define PNG_ZBUF_SIZE 8192
#define PNG_ZLIB_VERNUM 0x1280 #define PNG_ZLIB_VERNUM 0x1280

5
GRRLIB/lib/png/pngmem.c
View file

@ -41,7 +41,7 @@ png_destroy_png_struct(png_structrp png_ptr)
} }
/* Allocate memory. For reasonable files, size should never exceed /* Allocate memory. For reasonable files, size should never exceed
* 64K. However, zlib may allocate more then 64K if you don't tell * 64K. However, zlib may allocate more than 64K if you don't tell
* it not to. See zconf.h and png.h for more information. zlib does * it not to. See zconf.h and png.h for more information. zlib does
* need to allocate exactly 64K, so whatever you call here must * need to allocate exactly 64K, so whatever you call here must
* have the ability to do that. * have the ability to do that.
@ -77,6 +77,9 @@ png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size),
PNG_UNUSED(png_ptr) PNG_UNUSED(png_ptr)
#endif #endif
/* Some compilers complain that this is always true. However, it
* can be false when integer overflow happens.
*/
if (size > 0 && size <= PNG_SIZE_MAX if (size > 0 && size <= PNG_SIZE_MAX
# ifdef PNG_MAX_MALLOC_64K # ifdef PNG_MAX_MALLOC_64K
&& size <= 65536U && size <= 65536U

121
GRRLIB/lib/png/pngpread.c
View file

@ -1,8 +1,8 @@
/* pngpread.c - read a png file in push mode /* pngpread.c - read a png file in push mode
* *
* Last changed in libpng 1.6.15 [November 20, 2014] * Last changed in libpng 1.6.18 [July 23, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -19,7 +19,6 @@
#define PNG_READ_SIG_MODE 0 #define PNG_READ_SIG_MODE 0
#define PNG_READ_CHUNK_MODE 1 #define PNG_READ_CHUNK_MODE 1
#define PNG_READ_IDAT_MODE 2 #define PNG_READ_IDAT_MODE 2
#define PNG_SKIP_MODE 3
#define PNG_READ_tEXt_MODE 4 #define PNG_READ_tEXt_MODE 4
#define PNG_READ_zTXt_MODE 5 #define PNG_READ_zTXt_MODE 5
#define PNG_READ_DONE_MODE 6 #define PNG_READ_DONE_MODE 6
@ -78,32 +77,14 @@ png_process_data_pause(png_structrp png_ptr, int save)
png_uint_32 PNGAPI png_uint_32 PNGAPI
png_process_data_skip(png_structrp png_ptr) png_process_data_skip(png_structrp png_ptr)
{ {
png_uint_32 remaining = 0; /* TODO: Deprecate and remove this API.
* Somewhere the implementation of this seems to have been lost,
if (png_ptr != NULL && png_ptr->process_mode == PNG_SKIP_MODE && * or abandoned. It was only to support some internal back-door access
png_ptr->skip_length > 0) * to png_struct) in libpng-1.4.x.
{ */
/* At the end of png_process_data the buffer size must be 0 (see the loop png_app_warning(png_ptr,
* above) so we can detect a broken call here: "png_process_data_skip is not implemented in any current version of libpng");
*/ return 0;
if (png_ptr->buffer_size != 0)
png_error(png_ptr,
"png_process_data_skip called inside png_process_data");
/* If is impossible for there to be a saved buffer at this point -
* otherwise we could not be in SKIP mode. This will also happen if
* png_process_skip is called inside png_process_data (but only very
* rarely.)
*/
if (png_ptr->save_buffer_size != 0)
png_error(png_ptr, "png_process_data_skip called with saved data");
remaining = png_ptr->skip_length;
png_ptr->skip_length = 0;
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
}
return remaining;
} }
/* What we do with the incoming data depends on what we were previously /* What we do with the incoming data depends on what we were previously
@ -135,12 +116,6 @@ png_process_some_data(png_structrp png_ptr, png_inforp info_ptr)
break; break;
} }
case PNG_SKIP_MODE:
{
png_push_crc_finish(png_ptr);
break;
}
default: default:
{ {
png_ptr->buffer_size = 0; png_ptr->buffer_size = 0;
@ -159,7 +134,7 @@ void /* PRIVATE */
png_push_read_sig(png_structrp png_ptr, png_inforp info_ptr) png_push_read_sig(png_structrp png_ptr, png_inforp info_ptr)
{ {
png_size_t num_checked = png_ptr->sig_bytes, /* SAFE, does not exceed 8 */ png_size_t num_checked = png_ptr->sig_bytes, /* SAFE, does not exceed 8 */
num_to_check = 8 - num_checked; num_to_check = 8 - num_checked;
if (png_ptr->buffer_size < num_to_check) if (png_ptr->buffer_size < num_to_check)
{ {
@ -439,69 +414,6 @@ png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr)
png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
} }
void /* PRIVATE */
png_push_crc_skip(png_structrp png_ptr, png_uint_32 skip)
{
png_ptr->process_mode = PNG_SKIP_MODE;
png_ptr->skip_length = skip;
}
void /* PRIVATE */
png_push_crc_finish(png_structrp png_ptr)
{
if (png_ptr->skip_length != 0 && png_ptr->save_buffer_size != 0)
{
png_size_t save_size = png_ptr->save_buffer_size;
png_uint_32 skip_length = png_ptr->skip_length;
/* We want the smaller of 'skip_length' and 'save_buffer_size', but
* they are of different types and we don't know which variable has the
* fewest bits. Carefully select the smaller and cast it to the type of
* the larger - this cannot overflow. Do not cast in the following test
* - it will break on either 16 or 64 bit platforms.
*/
if (skip_length < save_size)
save_size = (png_size_t)skip_length;
else
skip_length = (png_uint_32)save_size;
png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size);
png_ptr->skip_length -= skip_length;
png_ptr->buffer_size -= save_size;
png_ptr->save_buffer_size -= save_size;
png_ptr->save_buffer_ptr += save_size;
}
if (png_ptr->skip_length != 0 && png_ptr->current_buffer_size != 0)
{
png_size_t save_size = png_ptr->current_buffer_size;
png_uint_32 skip_length = png_ptr->skip_length;
/* We want the smaller of 'skip_length' and 'current_buffer_size', here,
* the same problem exists as above and the same solution.
*/
if (skip_length < save_size)
save_size = (png_size_t)skip_length;
else
skip_length = (png_uint_32)save_size;
png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size);
png_ptr->skip_length -= skip_length;
png_ptr->buffer_size -= save_size;
png_ptr->current_buffer_size -= save_size;
png_ptr->current_buffer_ptr += save_size;
}
if (png_ptr->skip_length == 0)
{
PNG_PUSH_SAVE_BUFFER_IF_LT(4)
png_crc_finish(png_ptr, 0);
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
}
}
void PNGCBAPI void PNGCBAPI
png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length) png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
{ {
@ -584,13 +496,11 @@ png_push_save_buffer(png_structrp png_ptr)
if (png_ptr->save_buffer == NULL) if (png_ptr->save_buffer == NULL)
{ {
png_free(png_ptr, old_buffer); png_free(png_ptr, old_buffer);
old_buffer = NULL;
png_error(png_ptr, "Insufficient memory for save_buffer"); png_error(png_ptr, "Insufficient memory for save_buffer");
} }
memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size); memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size);
png_free(png_ptr, old_buffer); png_free(png_ptr, old_buffer);
old_buffer = NULL;
png_ptr->save_buffer_max = new_max; png_ptr->save_buffer_max = new_max;
} }
if (png_ptr->current_buffer_size) if (png_ptr->current_buffer_size)
@ -696,6 +606,7 @@ png_push_read_IDAT(png_structrp png_ptr)
png_ptr->current_buffer_size -= save_size; png_ptr->current_buffer_size -= save_size;
png_ptr->current_buffer_ptr += save_size; png_ptr->current_buffer_ptr += save_size;
} }
if (png_ptr->idat_size == 0) if (png_ptr->idat_size == 0)
{ {
PNG_PUSH_SAVE_BUFFER_IF_LT(4) PNG_PUSH_SAVE_BUFFER_IF_LT(4)
@ -726,7 +637,7 @@ png_process_IDAT_data(png_structrp png_ptr, png_bytep buffer,
* or the stream marked as finished. * or the stream marked as finished.
*/ */
while (png_ptr->zstream.avail_in > 0 && while (png_ptr->zstream.avail_in > 0 &&
!(png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED)) (png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED) == 0)
{ {
int ret; int ret;
@ -1036,6 +947,7 @@ png_push_process_row(png_structrp png_ptr)
} }
} }
else else
#endif
{ {
png_push_have_row(png_ptr, png_ptr->row_buf + 1); png_push_have_row(png_ptr, png_ptr->row_buf + 1);
png_read_push_finish_row(png_ptr); png_read_push_finish_row(png_ptr);
@ -1045,6 +957,7 @@ png_push_process_row(png_structrp png_ptr)
void /* PRIVATE */ void /* PRIVATE */
png_read_push_finish_row(png_structrp png_ptr) png_read_push_finish_row(png_structrp png_ptr)
{ {
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */ /* Start of interlace block */
@ -1069,6 +982,7 @@ png_read_push_finish_row(png_structrp png_ptr)
if (png_ptr->row_number < png_ptr->num_rows) if (png_ptr->row_number < png_ptr->num_rows)
return; return;
#ifdef PNG_READ_INTERLACING_SUPPORTED
if (png_ptr->interlaced != 0) if (png_ptr->interlaced != 0)
{ {
png_ptr->row_number = 0; png_ptr->row_number = 0;
@ -1103,6 +1017,7 @@ png_read_push_finish_row(png_structrp png_ptr)
} while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0); } while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0);
} }
#endif /* READ_INTERLACING */
} }
void /* PRIVATE */ void /* PRIVATE */
@ -1127,6 +1042,7 @@ png_push_have_row(png_structrp png_ptr, png_bytep row)
(int)png_ptr->pass); (int)png_ptr->pass);
} }
#ifdef PNG_READ_INTERLACING_SUPPORTED
void PNGAPI void PNGAPI
png_progressive_combine_row(png_const_structrp png_ptr, png_bytep old_row, png_progressive_combine_row(png_const_structrp png_ptr, png_bytep old_row,
png_const_bytep new_row) png_const_bytep new_row)
@ -1141,6 +1057,7 @@ png_progressive_combine_row(png_const_structrp png_ptr, png_bytep old_row,
if (new_row != NULL) if (new_row != NULL)
png_combine_row(png_ptr, old_row, 1/*blocky display*/); png_combine_row(png_ptr, old_row, 1/*blocky display*/);
} }
#endif /* READ_INTERLACING */
void PNGAPI void PNGAPI
png_set_progressive_read_fn(png_structrp png_ptr, png_voidp progressive_ptr, png_set_progressive_read_fn(png_structrp png_ptr, png_voidp progressive_ptr,

109
GRRLIB/lib/png/pngpriv.h
View file

@ -1,13 +1,11 @@
/* pngpriv.h - private declarations for use inside libpng /* pngpriv.h - private declarations for use inside libpng
* *
* For conditions of distribution and use, see copyright notice in png.h * Last changed in libpng 1.6.18 [July 23, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
* Last changed in libpng 1.6.10 [March 6, 1014]]
*
* This code is released under the libpng license. * This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer * For conditions of distribution and use, see the disclaimer
* and license in png.h * and license in png.h
@ -120,8 +118,12 @@
* to compile with an appropriate #error if ALIGNED_MEMORY has been turned * to compile with an appropriate #error if ALIGNED_MEMORY has been turned
* off. * off.
* *
* Note that gcc-4.9 defines __ARM_NEON instead of __ARM_NEON__, so we * Note that gcc-4.9 defines __ARM_NEON instead of the deprecated
* check both variants. * __ARM_NEON__, so we check both variants.
*
* To disable ARM_NEON optimizations entirely, and skip compiling the
* associated assembler code, pass --enable-arm-neon=no to configure
* or put -DPNG_ARM_NEON_OPT=0 in CPPFLAGS.
*/ */
# if (defined(__ARM_NEON__) || defined(__ARM_NEON)) && \ # if (defined(__ARM_NEON__) || defined(__ARM_NEON)) && \
defined(PNG_ALIGNED_MEMORY_SUPPORTED) defined(PNG_ALIGNED_MEMORY_SUPPORTED)
@ -250,17 +252,18 @@
* always be used to declare an extern data or function object in this file. * always be used to declare an extern data or function object in this file.
*/ */
#ifndef PNG_INTERNAL_DATA #ifndef PNG_INTERNAL_DATA
# define PNG_INTERNAL_DATA(type, name, array) extern type name array # define PNG_INTERNAL_DATA(type, name, array) PNG_LINKAGE_DATA type name array
#endif #endif
#ifndef PNG_INTERNAL_FUNCTION #ifndef PNG_INTERNAL_FUNCTION
# define PNG_INTERNAL_FUNCTION(type, name, args, attributes)\ # define PNG_INTERNAL_FUNCTION(type, name, args, attributes)\
extern PNG_FUNCTION(type, name, args, PNG_EMPTY attributes) PNG_LINKAGE_FUNCTION PNG_FUNCTION(type, name, args, PNG_EMPTY attributes)
#endif #endif
#ifndef PNG_INTERNAL_CALLBACK #ifndef PNG_INTERNAL_CALLBACK
# define PNG_INTERNAL_CALLBACK(type, name, args, attributes)\ # define PNG_INTERNAL_CALLBACK(type, name, args, attributes)\
extern PNG_FUNCTION(type, (PNGCBAPI name), args, PNG_EMPTY attributes) PNG_LINKAGE_CALLBACK PNG_FUNCTION(type, (PNGCBAPI name), args,\
PNG_EMPTY attributes)
#endif #endif
/* If floating or fixed point APIs are disabled they may still be compiled /* If floating or fixed point APIs are disabled they may still be compiled
@ -298,48 +301,27 @@
# define PNG_DLL_EXPORT # define PNG_DLL_EXPORT
#endif #endif
/* SECURITY and SAFETY: /* This is a global switch to set the compilation for an installed system
* (a release build). It can be set for testing debug builds to ensure that
* they will compile when the build type is switched to RC or STABLE, the
* default is just to use PNG_LIBPNG_BUILD_BASE_TYPE. Set this in CPPFLAGS
* with either:
* *
* By default libpng is built without any internal limits on image size, * -DPNG_RELEASE_BUILD Turns on the release compile path
* individual heap (png_malloc) allocations or the total amount of memory used. * -DPNG_RELEASE_BUILD=0 Turns it off
* If PNG_SAFE_LIMITS_SUPPORTED is defined, however, the limits below are used * or in your pngusr.h with
* (unless individually overridden). These limits are believed to be fairly * #define PNG_RELEASE_BUILD=1 Turns on the release compile path
* safe, but builders of secure systems should verify the values against the * #define PNG_RELEASE_BUILD=0 Turns it off
* real system capabilities.
*/ */
#ifdef PNG_SAFE_LIMITS_SUPPORTED #ifndef PNG_RELEASE_BUILD
/* 'safe' limits */ # define PNG_RELEASE_BUILD (PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC)
# ifndef PNG_USER_WIDTH_MAX
# define PNG_USER_WIDTH_MAX 1000000
# endif
# ifndef PNG_USER_HEIGHT_MAX
# define PNG_USER_HEIGHT_MAX 1000000
# endif
# ifndef PNG_USER_CHUNK_CACHE_MAX
# define PNG_USER_CHUNK_CACHE_MAX 128
# endif
# ifndef PNG_USER_CHUNK_MALLOC_MAX
# define PNG_USER_CHUNK_MALLOC_MAX 8000000
# endif
#else
/* values for no limits */
# ifndef PNG_USER_WIDTH_MAX
# define PNG_USER_WIDTH_MAX 0x7fffffff
# endif
# ifndef PNG_USER_HEIGHT_MAX
# define PNG_USER_HEIGHT_MAX 0x7fffffff
# endif
# ifndef PNG_USER_CHUNK_CACHE_MAX
# define PNG_USER_CHUNK_CACHE_MAX 0
# endif
# ifndef PNG_USER_CHUNK_MALLOC_MAX
# define PNG_USER_CHUNK_MALLOC_MAX 0
# endif
#endif #endif
/* Moved to pngpriv.h at libpng-1.5.0 */ /* SECURITY and SAFETY:
/* NOTE: some of these may have been used in external applications as *
* these definitions were exposed in pngconf.h prior to 1.5. * libpng is built with support for internal limits on image dimensions and
* memory usage. These are documented in scripts/pnglibconf.dfa of the
* source and recorded in the machine generated header file pnglibconf.h.
*/ */
/* If you are running on a machine where you cannot allocate more /* If you are running on a machine where you cannot allocate more
@ -582,13 +564,13 @@
#define PNG_RGB_TO_GRAY_WARN 0x400000 #define PNG_RGB_TO_GRAY_WARN 0x400000
#define PNG_RGB_TO_GRAY 0x600000 /* two bits, RGB_TO_GRAY_ERR|WARN */ #define PNG_RGB_TO_GRAY 0x600000 /* two bits, RGB_TO_GRAY_ERR|WARN */
#define PNG_ENCODE_ALPHA 0x800000 /* Added to libpng-1.5.4 */ #define PNG_ENCODE_ALPHA 0x800000 /* Added to libpng-1.5.4 */
#define PNG_ADD_ALPHA 0x1000000 /* Added to libpng-1.2.7 */ #define PNG_ADD_ALPHA 0x1000000 /* Added to libpng-1.2.7 */
#define PNG_EXPAND_tRNS 0x2000000 /* Added to libpng-1.2.9 */ #define PNG_EXPAND_tRNS 0x2000000 /* Added to libpng-1.2.9 */
#define PNG_SCALE_16_TO_8 0x4000000 /* Added to libpng-1.5.4 */ #define PNG_SCALE_16_TO_8 0x4000000 /* Added to libpng-1.5.4 */
/* 0x8000000 unused */ /* 0x8000000 unused */
/* 0x10000000 unused */ /* 0x10000000 unused */
/* 0x20000000 unused */ /* 0x20000000 unused */
/* 0x40000000 unused */ /* 0x40000000 unused */
/* Flags for png_create_struct */ /* Flags for png_create_struct */
#define PNG_STRUCT_PNG 0x0001 #define PNG_STRUCT_PNG 0x0001
#define PNG_STRUCT_INFO 0x0002 #define PNG_STRUCT_INFO 0x0002
@ -780,15 +762,17 @@
* macro will fail on top-bit-set values because of the sign extension. * macro will fail on top-bit-set values because of the sign extension.
*/ */
#define PNG_CHUNK_FROM_STRING(s)\ #define PNG_CHUNK_FROM_STRING(s)\
PNG_U32(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 /* 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 * signed and the argument is a (char[]) This macro will fail miserably on
* systems where (char) is more than 8 bits. * systems where (char) is more than 8 bits.
*/ */
#define PNG_STRING_FROM_CHUNK(s,c)\ #define PNG_STRING_FROM_CHUNK(s,c)\
(void)(((char*)(s))[0]=(char)((c)>>24), ((char*)(s))[1]=(char)((c)>>16),\ (void)(((char*)(s))[0]=(char)(((c)>>24) & 0xff), \
((char*)(s))[2]=(char)((c)>>8), ((char*)(s))[3]=(char)((c))) ((char*)(s))[1]=(char)(((c)>>16) & 0xff),\
((char*)(s))[2]=(char)(((c)>>8) & 0xff), \
((char*)(s))[3]=(char)((c & 0xff)))
/* Do the same but terminate with a null character. */ /* Do the same but terminate with a null character. */
#define PNG_CSTRING_FROM_CHUNK(s,c)\ #define PNG_CSTRING_FROM_CHUNK(s,c)\
@ -850,8 +834,9 @@ PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_table, [256]);
PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_base, [512]); PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_base, [512]);
PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]); PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]);
#define PNG_sRGB_FROM_LINEAR(linear) ((png_byte)((png_sRGB_base[(linear)>>15] +\ #define PNG_sRGB_FROM_LINEAR(linear) \
((((linear)&0x7fff)*png_sRGB_delta[(linear)>>15])>>12)) >> 8)) ((png_byte)(0xff & ((png_sRGB_base[(linear)>>15] \
+ ((((linear) & 0x7fff)*png_sRGB_delta[(linear)>>15])>>12)) >> 8)))
/* Given a value 'linear' in the range 0..255*65535 calculate the 8-bit sRGB /* Given a value 'linear' in the range 0..255*65535 calculate the 8-bit sRGB
* encoded value with maximum error 0.646365. Note that the input is not a * encoded value with maximum error 0.646365. Note that the input is not a
* 16-bit value; it has been multiplied by 255! */ * 16-bit value; it has been multiplied by 255! */
@ -910,7 +895,7 @@ PNG_INTERNAL_FUNCTION(png_voidp,png_malloc_base,(png_const_structrp png_ptr,
#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) ||\ #if defined(PNG_TEXT_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) ||\
defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED) defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED)
/* Internal array allocator, outputs no error or warning messages on failure, /* Internal array allocator, outputs no error or warning messages on failure,
* just returns NULL. * just returns NULL.
*/ */
PNG_INTERNAL_FUNCTION(png_voidp,png_malloc_array,(png_const_structrp png_ptr, PNG_INTERNAL_FUNCTION(png_voidp,png_malloc_array,(png_const_structrp png_ptr,
int nelements, size_t element_size),PNG_ALLOCATED); int nelements, size_t element_size),PNG_ALLOCATED);
@ -1408,10 +1393,6 @@ PNG_INTERNAL_FUNCTION(void,png_push_read_chunk,(png_structrp png_ptr,
PNG_INTERNAL_FUNCTION(void,png_push_read_sig,(png_structrp png_ptr, PNG_INTERNAL_FUNCTION(void,png_push_read_sig,(png_structrp png_ptr,
png_inforp info_ptr),PNG_EMPTY); png_inforp info_ptr),PNG_EMPTY);
PNG_INTERNAL_FUNCTION(void,png_push_check_crc,(png_structrp png_ptr),PNG_EMPTY); PNG_INTERNAL_FUNCTION(void,png_push_check_crc,(png_structrp png_ptr),PNG_EMPTY);
PNG_INTERNAL_FUNCTION(void,png_push_crc_skip,(png_structrp png_ptr,
png_uint_32 length),PNG_EMPTY);
PNG_INTERNAL_FUNCTION(void,png_push_crc_finish,(png_structrp png_ptr),
PNG_EMPTY);
PNG_INTERNAL_FUNCTION(void,png_push_save_buffer,(png_structrp png_ptr), PNG_INTERNAL_FUNCTION(void,png_push_save_buffer,(png_structrp png_ptr),
PNG_EMPTY); PNG_EMPTY);
PNG_INTERNAL_FUNCTION(void,png_push_restore_buffer,(png_structrp png_ptr, PNG_INTERNAL_FUNCTION(void,png_push_restore_buffer,(png_structrp png_ptr,

37
GRRLIB/lib/png/pngread.c
View file

@ -1,8 +1,8 @@
/* pngread.c - read a PNG file /* pngread.c - read a PNG file
* *
* Last changed in libpng 1.6.15 [November 20, 2014] * Last changed in libpng 1.6.17 [March 26, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -63,7 +63,7 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
/* In stable builds only warn if an application error can be completely /* In stable builds only warn if an application error can be completely
* handled. * handled.
*/ */
# if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC # if PNG_RELEASE_BUILD
png_ptr->flags |= PNG_FLAG_APP_WARNINGS_WARN; png_ptr->flags |= PNG_FLAG_APP_WARNINGS_WARN;
# endif # endif
# endif # endif
@ -814,8 +814,7 @@ png_read_end(png_structrp png_ptr, png_inforp info_ptr)
/* Zero length IDATs are legal after the last IDAT has been /* Zero length IDATs are legal after the last IDAT has been
* read, but not after other chunks have been read. * read, but not after other chunks have been read.
*/ */
if ((length > 0) || if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) != 0)
(png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT) != 0)
png_benign_error(png_ptr, "Too many IDATs found"); png_benign_error(png_ptr, "Too many IDATs found");
png_crc_finish(png_ptr, length); png_crc_finish(png_ptr, length);
@ -1044,9 +1043,9 @@ png_read_png(png_structrp png_ptr, png_inforp info_ptr,
/* Tell libpng to strip 16-bit/color files down to 8 bits per color. /* Tell libpng to strip 16-bit/color files down to 8 bits per color.
*/ */
if ((transforms & PNG_TRANSFORM_SCALE_16) != 0) if ((transforms & PNG_TRANSFORM_SCALE_16) != 0)
/* Added at libpng-1.5.4. "strip_16" produces the same result that it /* Added at libpng-1.5.4. "strip_16" produces the same result that it
* did in earlier versions, while "scale_16" is now more accurate. * did in earlier versions, while "scale_16" is now more accurate.
*/ */
#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
png_set_scale_16(png_ptr); png_set_scale_16(png_ptr);
#else #else
@ -1210,7 +1209,7 @@ png_read_png(png_structrp png_ptr, png_inforp info_ptr,
for (iptr = 0; iptr < info_ptr->height; iptr++) for (iptr = 0; iptr < info_ptr->height; iptr++)
info_ptr->row_pointers[iptr] = png_voidcast(png_bytep, info_ptr->row_pointers[iptr] = png_voidcast(png_bytep,
png_malloc(png_ptr, info_ptr->rowbytes)); png_malloc(png_ptr, info_ptr->rowbytes));
} }
png_read_image(png_ptr, info_ptr->row_pointers); png_read_image(png_ptr, info_ptr->row_pointers);
@ -1824,6 +1823,7 @@ png_create_colormap_entry(png_image_read_control *display,
y = (y + 128) >> 8; y = (y + 128) >> 8;
y *= 255; y *= 255;
y = PNG_sRGB_FROM_LINEAR((y + 64) >> 7); y = PNG_sRGB_FROM_LINEAR((y + 64) >> 7);
alpha = PNG_DIV257(alpha);
encoding = P_sRGB; encoding = P_sRGB;
} }
@ -2286,8 +2286,14 @@ png_image_read_colormap(png_voidp argument)
output_processing = PNG_CMAP_NONE; output_processing = PNG_CMAP_NONE;
break; break;
} }
#ifdef __COVERITY__
/* Coverity claims that output_encoding cannot be 2 (P_LINEAR)
* here.
*/
back_alpha = 255;
#else
back_alpha = output_encoding == P_LINEAR ? 65535 : 255; back_alpha = output_encoding == P_LINEAR ? 65535 : 255;
#endif
} }
/* output_processing means that the libpng-processed row will be /* output_processing means that the libpng-processed row will be
@ -2412,7 +2418,14 @@ png_image_read_colormap(png_voidp argument)
*/ */
background_index = i; background_index = i;
png_create_colormap_entry(display, i++, back_r, back_g, back_b, png_create_colormap_entry(display, i++, back_r, back_g, back_b,
output_encoding == P_LINEAR ? 65535U : 255U, output_encoding); #ifdef __COVERITY__
/* Coverity claims that output_encoding cannot be 2 (P_LINEAR)
* here.
*/ 255U,
#else
output_encoding == P_LINEAR ? 65535U : 255U,
#endif
output_encoding);
/* For non-opaque input composite on the sRGB background - this /* For non-opaque input composite on the sRGB background - this
* requires inverting the encoding for each component. The input * requires inverting the encoding for each component. The input
@ -3246,7 +3259,7 @@ png_image_read_composite(png_voidp argument)
png_uint_32 width = image->width; png_uint_32 width = image->width;
ptrdiff_t step_row = display->row_bytes; ptrdiff_t step_row = display->row_bytes;
unsigned int channels = unsigned int channels =
(image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1; (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1;
int pass; int pass;
for (pass = 0; pass < passes; ++pass) for (pass = 0; pass < passes; ++pass)

6
GRRLIB/lib/png/pngrio.c
View file

@ -1,8 +1,8 @@
/* pngrio.c - functions for data input /* pngrio.c - functions for data input
* *
* Last changed in libpng 1.6.15 [November 20, 2014] * Last changed in libpng 1.6.17 [March 26, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -26,7 +26,7 @@
* reads from a file pointer. Note that this routine sometimes gets called * reads from a file pointer. Note that this routine sometimes gets called
* with very small lengths, so you should implement some kind of simple * with very small lengths, so you should implement some kind of simple
* buffering if you are using unbuffered reads. This should never be asked * buffering if you are using unbuffered reads. This should never be asked
* to read more then 64K on a 16 bit machine. * to read more than 64K on a 16 bit machine.
*/ */
void /* PRIVATE */ void /* PRIVATE */
png_read_data(png_structrp png_ptr, png_bytep data, png_size_t length) png_read_data(png_structrp png_ptr, png_bytep data, png_size_t length)

62
GRRLIB/lib/png/pngrtran.c
View file

@ -1,8 +1,8 @@
/* pngrtran.c - transforms the data in a row for PNG readers /* pngrtran.c - transforms the data in a row for PNG readers
* *
* Last changed in libpng 1.6.15 [November 20, 2014] * Last changed in libpng 1.6.18 [July 23, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -394,7 +394,7 @@ png_set_alpha_mode(png_structrp png_ptr, int mode, double output_gamma)
/* Dither file to 8-bit. Supply a palette, the current number /* Dither file to 8-bit. Supply a palette, the current number
* of elements in the palette, the maximum number of elements * of elements in the palette, the maximum number of elements
* allowed, and a histogram if possible. If the current number * allowed, and a histogram if possible. If the current number
* of colors is greater then the maximum number, the palette will be * of colors is greater than the maximum number, the palette will be
* modified to fit in the maximum number. "full_quantize" indicates * modified to fit in the maximum number. "full_quantize" indicates
* whether we need a quantizing cube set up for RGB images, or if we * whether we need a quantizing cube set up for RGB images, or if we
* simply are reducing the number of colors in a paletted image. * simply are reducing the number of colors in a paletted image.
@ -2357,7 +2357,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row,
if (++channel >= channels) if (++channel >= channels)
channel = 0; channel = 0;
*bp++ = (png_byte)(value >> 8); *bp++ = (png_byte)(value >> 8);
*bp++ = (png_byte)(value & 0xff); *bp++ = (png_byte)value;
} }
break; break;
} }
@ -2662,9 +2662,9 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
png_uint_32 row_width = row_info->width; png_uint_32 row_width = row_info->width;
#ifdef PNG_READ_16BIT_SUPPORTED #ifdef PNG_READ_16BIT_SUPPORTED
png_byte hi_filler = (png_byte)((filler>>8) & 0xff); png_byte hi_filler = (png_byte)(filler>>8);
#endif #endif
png_byte lo_filler = (png_byte)(filler & 0xff); png_byte lo_filler = (png_byte)filler;
png_debug(1, "in png_do_read_filler"); png_debug(1, "in png_do_read_filler");
@ -2715,13 +2715,13 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
png_bytep dp = sp + (png_size_t)row_width * 2; png_bytep dp = sp + (png_size_t)row_width * 2;
for (i = 1; i < row_width; i++) for (i = 1; i < row_width; i++)
{ {
*(--dp) = hi_filler;
*(--dp) = lo_filler; *(--dp) = lo_filler;
*(--dp) = hi_filler;
*(--dp) = *(--sp); *(--dp) = *(--sp);
*(--dp) = *(--sp); *(--dp) = *(--sp);
} }
*(--dp) = hi_filler;
*(--dp) = lo_filler; *(--dp) = lo_filler;
*(--dp) = hi_filler;
row_info->channels = 2; row_info->channels = 2;
row_info->pixel_depth = 32; row_info->pixel_depth = 32;
row_info->rowbytes = row_width * 4; row_info->rowbytes = row_width * 4;
@ -2736,8 +2736,8 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
{ {
*(--dp) = *(--sp); *(--dp) = *(--sp);
*(--dp) = *(--sp); *(--dp) = *(--sp);
*(--dp) = hi_filler;
*(--dp) = lo_filler; *(--dp) = lo_filler;
*(--dp) = hi_filler;
} }
row_info->channels = 2; row_info->channels = 2;
row_info->pixel_depth = 32; row_info->pixel_depth = 32;
@ -2796,8 +2796,8 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
png_bytep dp = sp + (png_size_t)row_width * 2; png_bytep dp = sp + (png_size_t)row_width * 2;
for (i = 1; i < row_width; i++) for (i = 1; i < row_width; i++)
{ {
*(--dp) = hi_filler;
*(--dp) = lo_filler; *(--dp) = lo_filler;
*(--dp) = hi_filler;
*(--dp) = *(--sp); *(--dp) = *(--sp);
*(--dp) = *(--sp); *(--dp) = *(--sp);
*(--dp) = *(--sp); *(--dp) = *(--sp);
@ -2805,8 +2805,8 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
*(--dp) = *(--sp); *(--dp) = *(--sp);
*(--dp) = *(--sp); *(--dp) = *(--sp);
} }
*(--dp) = hi_filler;
*(--dp) = lo_filler; *(--dp) = lo_filler;
*(--dp) = hi_filler;
row_info->channels = 4; row_info->channels = 4;
row_info->pixel_depth = 64; row_info->pixel_depth = 64;
row_info->rowbytes = row_width * 8; row_info->rowbytes = row_width * 8;
@ -2825,8 +2825,8 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
*(--dp) = *(--sp); *(--dp) = *(--sp);
*(--dp) = *(--sp); *(--dp) = *(--sp);
*(--dp) = *(--sp); *(--dp) = *(--sp);
*(--dp) = hi_filler;
*(--dp) = lo_filler; *(--dp) = lo_filler;
*(--dp) = hi_filler;
} }
row_info->channels = 4; row_info->channels = 4;
@ -3087,10 +3087,11 @@ png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row)
for (i = 0; i < row_width; i++) for (i = 0; i < row_width; i++)
{ {
png_uint_16 red, green, blue, w; png_uint_16 red, green, blue, w;
png_byte hi,lo;
red = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2; hi=*(sp)++; lo=*(sp)++; red = (png_uint_16)((hi << 8) | (lo));
green = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2; hi=*(sp)++; lo=*(sp)++; green = (png_uint_16)((hi << 8) | (lo));
blue = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2; hi=*(sp)++; lo=*(sp)++; blue = (png_uint_16)((hi << 8) | (lo));
if (red == green && red == blue) if (red == green && red == blue)
{ {
@ -3104,16 +3105,16 @@ png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row)
else else
{ {
png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red & 0xff)
>> png_ptr->gamma_shift][red>>8]; >> png_ptr->gamma_shift][red>>8];
png_uint_16 green_1 = png_uint_16 green_1 =
png_ptr->gamma_16_to_1[(green&0xff) >> png_ptr->gamma_16_to_1[(green & 0xff) >>
png_ptr->gamma_shift][green>>8]; png_ptr->gamma_shift][green>>8];
png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue & 0xff)
>> png_ptr->gamma_shift][blue>>8]; >> png_ptr->gamma_shift][blue>>8];
png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1 png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1
+ bc*blue_1 + 16384)>>15); + bc*blue_1 + 16384)>>15);
w = png_ptr->gamma_16_from_1[(gray16&0xff) >> w = png_ptr->gamma_16_from_1[(gray16 & 0xff) >>
png_ptr->gamma_shift][gray16 >> 8]; png_ptr->gamma_shift][gray16 >> 8];
rgb_error |= 1; rgb_error |= 1;
} }
@ -3138,10 +3139,11 @@ png_do_rgb_to_gray(png_structrp png_ptr, png_row_infop row_info, png_bytep row)
for (i = 0; i < row_width; i++) for (i = 0; i < row_width; i++)
{ {
png_uint_16 red, green, blue, gray16; png_uint_16 red, green, blue, gray16;
png_byte hi,lo;
red = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2; hi=*(sp)++; lo=*(sp)++; red = (png_uint_16)((hi << 8) | (lo));
green = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2; hi=*(sp)++; lo=*(sp)++; green = (png_uint_16)((hi << 8) | (lo));
blue = (png_uint_16)(((*(sp)) << 8) | *(sp + 1)); sp += 2; hi=*(sp)++; lo=*(sp)++; blue = (png_uint_16)((hi << 8) | (lo));
if (red != green || red != blue) if (red != green || red != blue)
rgb_error |= 1; rgb_error |= 1;
@ -3667,7 +3669,8 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structrp png_ptr)
if (optimize != 0) if (optimize != 0)
w = v; w = v;
else else
w = gamma_16_from_1[(v&0xff) >> gamma_shift][v >> 8]; w = gamma_16_from_1[(v & 0xff) >>
gamma_shift][v >> 8];
*sp = (png_byte)((w >> 8) & 0xff); *sp = (png_byte)((w >> 8) & 0xff);
*(sp + 1) = (png_byte)(w & 0xff); *(sp + 1) = (png_byte)(w & 0xff);
} }
@ -3831,7 +3834,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structrp png_ptr)
v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp]; v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp];
png_composite_16(w, v, a, png_ptr->background_1.red); png_composite_16(w, v, a, png_ptr->background_1.red);
if (optimize == 0) if (optimize == 0)
w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> w = gamma_16_from_1[((w & 0xff) >> gamma_shift)][w >>
8]; 8];
*sp = (png_byte)((w >> 8) & 0xff); *sp = (png_byte)((w >> 8) & 0xff);
*(sp + 1) = (png_byte)(w & 0xff); *(sp + 1) = (png_byte)(w & 0xff);
@ -3839,7 +3842,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structrp png_ptr)
v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)]; v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)];
png_composite_16(w, v, a, png_ptr->background_1.green); png_composite_16(w, v, a, png_ptr->background_1.green);
if (optimize == 0) if (optimize == 0)
w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> w = gamma_16_from_1[((w & 0xff) >> gamma_shift)][w >>
8]; 8];
*(sp + 2) = (png_byte)((w >> 8) & 0xff); *(sp + 2) = (png_byte)((w >> 8) & 0xff);
@ -3848,7 +3851,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structrp png_ptr)
v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)]; v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)];
png_composite_16(w, v, a, png_ptr->background_1.blue); png_composite_16(w, v, a, png_ptr->background_1.blue);
if (optimize == 0) if (optimize == 0)
w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> w = gamma_16_from_1[((w & 0xff) >> gamma_shift)][w >>
8]; 8];
*(sp + 4) = (png_byte)((w >> 8) & 0xff); *(sp + 4) = (png_byte)((w >> 8) & 0xff);
@ -4457,7 +4460,7 @@ png_do_expand(png_row_infop row_info, png_bytep row,
for (i = 0; i < row_width; i++) for (i = 0; i < row_width; i++)
{ {
if (*sp == gray) if ((*sp & 0xffU) == gray)
*dp-- = 0; *dp-- = 0;
else else
@ -4475,7 +4478,8 @@ png_do_expand(png_row_infop row_info, png_bytep row,
dp = row + (row_info->rowbytes << 1) - 1; dp = row + (row_info->rowbytes << 1) - 1;
for (i = 0; i < row_width; i++) for (i = 0; i < row_width; i++)
{ {
if (*(sp - 1) == gray_high && *(sp) == gray_low) if ((*(sp - 1) & 0xffU) == gray_high &&
(*(sp) & 0xffU) == gray_low)
{ {
*dp-- = 0; *dp-- = 0;
*dp-- = 0; *dp-- = 0;
@ -4837,7 +4841,7 @@ png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info)
/* Because PNG_COMPOSE does the gamma transform if there is something to /* Because PNG_COMPOSE does the gamma transform if there is something to
* do (if there is an alpha channel or transparency.) * do (if there is an alpha channel or transparency.)
*/ */
!((png_ptr->transformations & PNG_COMPOSE) && !((png_ptr->transformations & PNG_COMPOSE) != 0 &&
((png_ptr->num_trans != 0) || ((png_ptr->num_trans != 0) ||
(png_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0)) && (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0)) &&
#endif #endif

360
GRRLIB/lib/png/pngrutil.c
View file

@ -1,8 +1,8 @@
/* pngrutil.c - utilities to read a PNG file /* pngrutil.c - utilities to read a PNG file
* *
* Last changed in libpng 1.6.15 [November 20, 2014] * Last changed in libpng 1.6.18 [July 23, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -341,7 +341,7 @@ png_inflate_claim(png_structrp png_ptr, png_uint_32 owner)
* are minimal. * are minimal.
*/ */
(void)png_safecat(msg, (sizeof msg), 4, " using zstream"); (void)png_safecat(msg, (sizeof msg), 4, " using zstream");
#if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC #if PNG_RELEASE_BUILD
png_chunk_warning(png_ptr, msg); png_chunk_warning(png_ptr, msg);
png_ptr->zowner = 0; png_ptr->zowner = 0;
#else #else
@ -575,7 +575,7 @@ png_decompress_chunk(png_structrp png_ptr,
*/ */
png_alloc_size_t limit = PNG_SIZE_MAX; png_alloc_size_t limit = PNG_SIZE_MAX;
# ifdef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED # ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (png_ptr->user_chunk_malloc_max > 0 && if (png_ptr->user_chunk_malloc_max > 0 &&
png_ptr->user_chunk_malloc_max < limit) png_ptr->user_chunk_malloc_max < limit)
limit = png_ptr->user_chunk_malloc_max; limit = png_ptr->user_chunk_malloc_max;
@ -670,7 +670,6 @@ png_decompress_chunk(png_structrp png_ptr,
* success) * success)
*/ */
png_free(png_ptr, text); png_free(png_ptr, text);
text = NULL;
/* This really is very benign, but it's still an error because /* This really is very benign, but it's still an error because
* the extra space may otherwise be used as a Trojan Horse. * the extra space may otherwise be used as a Trojan Horse.
@ -1147,11 +1146,13 @@ png_handle_sBIT(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
return; return;
for (i=0; i<truelen; ++i) for (i=0; i<truelen; ++i)
{
if (buf[i] == 0 || buf[i] > sample_depth) if (buf[i] == 0 || buf[i] > sample_depth)
{ {
png_chunk_benign_error(png_ptr, "invalid"); png_chunk_benign_error(png_ptr, "invalid");
return; return;
} }
}
if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0) if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0)
{ {
@ -1462,10 +1463,10 @@ png_handle_iCCP(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
finished = 1; finished = 1;
# ifdef PNG_sRGB_SUPPORTED # ifdef PNG_sRGB_SUPPORTED
/* Check for a match against sRGB */ /* Check for a match against sRGB */
png_icc_set_sRGB(png_ptr, png_icc_set_sRGB(png_ptr,
&png_ptr->colorspace, profile, &png_ptr->colorspace, profile,
png_ptr->zstream.adler); png_ptr->zstream.adler);
# endif # endif
/* Steal the profile for info_ptr. */ /* Steal the profile for info_ptr. */
@ -1515,8 +1516,10 @@ png_handle_iCCP(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
else if (size > 0) else if (size > 0)
errmsg = "truncated"; errmsg = "truncated";
#ifndef __COVERITY__
else else
errmsg = png_ptr->zstream.msg; errmsg = png_ptr->zstream.msg;
#endif
} }
/* else png_icc_check_tag_table output an error */ /* else png_icc_check_tag_table output an error */
@ -1673,8 +1676,8 @@ png_handle_sPLT(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
if (dl > max_dl) if (dl > max_dl)
{ {
png_warning(png_ptr, "sPLT chunk too long"); png_warning(png_ptr, "sPLT chunk too long");
return; return;
} }
new_palette.nentries = (png_int_32)(data_length / entry_size); new_palette.nentries = (png_int_32)(data_length / entry_size);
@ -1684,8 +1687,8 @@ png_handle_sPLT(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
if (new_palette.entries == NULL) if (new_palette.entries == NULL)
{ {
png_warning(png_ptr, "sPLT chunk requires too much memory"); png_warning(png_ptr, "sPLT chunk requires too much memory");
return; return;
} }
#ifdef PNG_POINTER_INDEXING_SUPPORTED #ifdef PNG_POINTER_INDEXING_SUPPORTED
@ -1815,7 +1818,8 @@ png_handle_tRNS(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
return; return;
} }
if (length > png_ptr->num_palette || length > PNG_MAX_PALETTE_LENGTH || if (length > png_ptr->num_palette ||
length > (unsigned int) PNG_MAX_PALETTE_LENGTH ||
length == 0) length == 0)
{ {
png_crc_finish(png_ptr, length); png_crc_finish(png_ptr, length);
@ -1978,7 +1982,7 @@ png_handle_hIST(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
num = length / 2 ; num = length / 2 ;
if (num != png_ptr->num_palette || num > PNG_MAX_PALETTE_LENGTH) if (num != png_ptr->num_palette || num > (unsigned int) PNG_MAX_PALETTE_LENGTH)
{ {
png_crc_finish(png_ptr, length); png_crc_finish(png_ptr, length);
png_chunk_benign_error(png_ptr, "invalid"); png_chunk_benign_error(png_ptr, "invalid");
@ -2713,14 +2717,14 @@ png_cache_unknown_chunk(png_structrp png_ptr, png_uint_32 length)
png_ptr->unknown_chunk.data = NULL; png_ptr->unknown_chunk.data = NULL;
} }
# ifdef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED # ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (png_ptr->user_chunk_malloc_max > 0 && if (png_ptr->user_chunk_malloc_max > 0 &&
png_ptr->user_chunk_malloc_max < limit) png_ptr->user_chunk_malloc_max < limit)
limit = png_ptr->user_chunk_malloc_max; limit = png_ptr->user_chunk_malloc_max;
# elif PNG_USER_CHUNK_MALLOC_MAX > 0 # elif PNG_USER_CHUNK_MALLOC_MAX > 0
if (PNG_USER_CHUNK_MALLOC_MAX < limit) if (PNG_USER_CHUNK_MALLOC_MAX < limit)
limit = PNG_USER_CHUNK_MALLOC_MAX; limit = PNG_USER_CHUNK_MALLOC_MAX;
# endif # endif
if (length <= limit) if (length <= limit)
@ -2783,7 +2787,7 @@ png_handle_unknown(png_structrp png_ptr, png_inforp info_ptr,
*/ */
# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED # ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
# ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED # ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
keep = png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name); keep = png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name);
# endif # endif
# endif # endif
@ -2792,153 +2796,153 @@ png_handle_unknown(png_structrp png_ptr, png_inforp info_ptr,
* PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) * PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
*/ */
# ifdef PNG_READ_USER_CHUNKS_SUPPORTED # ifdef PNG_READ_USER_CHUNKS_SUPPORTED
/* The user callback takes precedence over the chunk keep value, but the /* The user callback takes precedence over the chunk keep value, but the
* keep value is still required to validate a save of a critical chunk. * keep value is still required to validate a save of a critical chunk.
*/ */
if (png_ptr->read_user_chunk_fn != NULL) if (png_ptr->read_user_chunk_fn != NULL)
{
if (png_cache_unknown_chunk(png_ptr, length) != 0)
{ {
if (png_cache_unknown_chunk(png_ptr, length) != 0) /* Callback to user unknown chunk handler */
int ret = (*(png_ptr->read_user_chunk_fn))(png_ptr,
&png_ptr->unknown_chunk);
/* ret is:
* negative: An error occurred; png_chunk_error will be called.
* zero: The chunk was not handled, the chunk will be discarded
* unless png_set_keep_unknown_chunks has been used to set
* a 'keep' behavior for this particular chunk, in which
* case that will be used. A critical chunk will cause an
* error at this point unless it is to be saved.
* positive: The chunk was handled, libpng will ignore/discard it.
*/
if (ret < 0)
png_chunk_error(png_ptr, "error in user chunk");
else if (ret == 0)
{ {
/* Callback to user unknown chunk handler */ /* If the keep value is 'default' or 'never' override it, but
int ret = (*(png_ptr->read_user_chunk_fn))(png_ptr, * still error out on critical chunks unless the keep value is
&png_ptr->unknown_chunk); * 'always' While this is weird it is the behavior in 1.4.12.
* A possible improvement would be to obey the value set for the
/* ret is: * chunk, but this would be an API change that would probably
* negative: An error occured, png_chunk_error will be called. * damage some applications.
* zero: The chunk was not handled, the chunk will be discarded *
* unless png_set_keep_unknown_chunks has been used to set * The png_app_warning below catches the case that matters, where
* a 'keep' behavior for this particular chunk, in which * the application has not set specific save or ignore for this
* case that will be used. A critical chunk will cause an * chunk or global save or ignore.
* error at this point unless it is to be saved.
* positive: The chunk was handled, libpng will ignore/discard it.
*/ */
if (ret < 0) if (keep < PNG_HANDLE_CHUNK_IF_SAFE)
png_chunk_error(png_ptr, "error in user chunk");
else if (ret == 0)
{ {
/* If the keep value is 'default' or 'never' override it, but # ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
* still error out on critical chunks unless the keep value is if (png_ptr->unknown_default < PNG_HANDLE_CHUNK_IF_SAFE)
* 'always' While this is weird it is the behavior in 1.4.12.
* A possible improvement would be to obey the value set for the
* chunk, but this would be an API change that would probably
* damage some applications.
*
* The png_app_warning below catches the case that matters, where
* the application has not set specific save or ignore for this
* chunk or global save or ignore.
*/
if (keep < PNG_HANDLE_CHUNK_IF_SAFE)
{ {
# ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED png_chunk_warning(png_ptr, "Saving unknown chunk:");
if (png_ptr->unknown_default < PNG_HANDLE_CHUNK_IF_SAFE) png_app_warning(png_ptr,
{ "forcing save of an unhandled chunk;"
png_chunk_warning(png_ptr, "Saving unknown chunk:"); " please call png_set_keep_unknown_chunks");
png_app_warning(png_ptr, /* with keep = PNG_HANDLE_CHUNK_IF_SAFE */
"forcing save of an unhandled chunk;"
" please call png_set_keep_unknown_chunks");
/* with keep = PNG_HANDLE_CHUNK_IF_SAFE */
}
# endif
keep = PNG_HANDLE_CHUNK_IF_SAFE;
} }
} # endif
keep = PNG_HANDLE_CHUNK_IF_SAFE;
else /* chunk was handled */
{
handled = 1;
/* Critical chunks can be safely discarded at this point. */
keep = PNG_HANDLE_CHUNK_NEVER;
} }
} }
else else /* chunk was handled */
keep = PNG_HANDLE_CHUNK_NEVER; /* insufficient memory */ {
handled = 1;
/* Critical chunks can be safely discarded at this point. */
keep = PNG_HANDLE_CHUNK_NEVER;
}
} }
else else
/* Use the SAVE_UNKNOWN_CHUNKS code or skip the chunk */ keep = PNG_HANDLE_CHUNK_NEVER; /* insufficient memory */
}
else
/* Use the SAVE_UNKNOWN_CHUNKS code or skip the chunk */
# endif /* READ_USER_CHUNKS */ # endif /* READ_USER_CHUNKS */
# ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED # ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
{
/* keep is currently just the per-chunk setting, if there was no
* setting change it to the global default now (not that this may
* still be AS_DEFAULT) then obtain the cache of the chunk if required,
* if not simply skip the chunk.
*/
if (keep == PNG_HANDLE_CHUNK_AS_DEFAULT)
keep = png_ptr->unknown_default;
if (keep == PNG_HANDLE_CHUNK_ALWAYS ||
(keep == PNG_HANDLE_CHUNK_IF_SAFE &&
PNG_CHUNK_ANCILLARY(png_ptr->chunk_name)))
{ {
/* keep is currently just the per-chunk setting, if there was no if (png_cache_unknown_chunk(png_ptr, length) == 0)
* setting change it to the global default now (not that this may keep = PNG_HANDLE_CHUNK_NEVER;
* still be AS_DEFAULT) then obtain the cache of the chunk if required,
* if not simply skip the chunk.
*/
if (keep == PNG_HANDLE_CHUNK_AS_DEFAULT)
keep = png_ptr->unknown_default;
if (keep == PNG_HANDLE_CHUNK_ALWAYS ||
(keep == PNG_HANDLE_CHUNK_IF_SAFE &&
PNG_CHUNK_ANCILLARY(png_ptr->chunk_name)))
{
if (png_cache_unknown_chunk(png_ptr, length) == 0)
keep = PNG_HANDLE_CHUNK_NEVER;
}
else
png_crc_finish(png_ptr, length);
} }
else
png_crc_finish(png_ptr, length);
}
# else # else
# ifndef PNG_READ_USER_CHUNKS_SUPPORTED # ifndef PNG_READ_USER_CHUNKS_SUPPORTED
# error no method to support READ_UNKNOWN_CHUNKS # error no method to support READ_UNKNOWN_CHUNKS
# endif # endif
{ {
/* If here there is no read callback pointer set and no support is /* If here there is no read callback pointer set and no support is
* compiled in to just save the unknown chunks, so simply skip this * compiled in to just save the unknown chunks, so simply skip this
* chunk. If 'keep' is something other than AS_DEFAULT or NEVER then * chunk. If 'keep' is something other than AS_DEFAULT or NEVER then
* the app has erroneously asked for unknown chunk saving when there * the app has erroneously asked for unknown chunk saving when there
* is no support. * is no support.
*/ */
if (keep > PNG_HANDLE_CHUNK_NEVER) if (keep > PNG_HANDLE_CHUNK_NEVER)
png_app_error(png_ptr, "no unknown chunk support available"); png_app_error(png_ptr, "no unknown chunk support available");
png_crc_finish(png_ptr, length); png_crc_finish(png_ptr, length);
} }
# endif # endif
# ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED # ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
/* Now store the chunk in the chunk list if appropriate, and if the limits /* Now store the chunk in the chunk list if appropriate, and if the limits
* permit it. * permit it.
*/ */
if (keep == PNG_HANDLE_CHUNK_ALWAYS || if (keep == PNG_HANDLE_CHUNK_ALWAYS ||
(keep == PNG_HANDLE_CHUNK_IF_SAFE && (keep == PNG_HANDLE_CHUNK_IF_SAFE &&
PNG_CHUNK_ANCILLARY(png_ptr->chunk_name))) PNG_CHUNK_ANCILLARY(png_ptr->chunk_name)))
{
# ifdef PNG_USER_LIMITS_SUPPORTED
switch (png_ptr->user_chunk_cache_max)
{ {
# ifdef PNG_USER_LIMITS_SUPPORTED case 2:
switch (png_ptr->user_chunk_cache_max) png_ptr->user_chunk_cache_max = 1;
{ png_chunk_benign_error(png_ptr, "no space in chunk cache");
case 2: /* FALL THROUGH */
png_ptr->user_chunk_cache_max = 1; case 1:
png_chunk_benign_error(png_ptr, "no space in chunk cache"); /* NOTE: prior to 1.6.0 this case resulted in an unknown critical
/* FALL THROUGH */ * chunk being skipped, now there will be a hard error below.
case 1: */
/* NOTE: prior to 1.6.0 this case resulted in an unknown critical break;
* chunk being skipped, now there will be a hard error below.
*/
break;
default: /* not at limit */ default: /* not at limit */
--(png_ptr->user_chunk_cache_max); --(png_ptr->user_chunk_cache_max);
/* FALL THROUGH */ /* FALL THROUGH */
case 0: /* no limit */ case 0: /* no limit */
# endif /* USER_LIMITS */ # endif /* USER_LIMITS */
/* Here when the limit isn't reached or when limits are compiled /* Here when the limit isn't reached or when limits are compiled
* out; store the chunk. * out; store the chunk.
*/ */
png_set_unknown_chunks(png_ptr, info_ptr, png_set_unknown_chunks(png_ptr, info_ptr,
&png_ptr->unknown_chunk, 1); &png_ptr->unknown_chunk, 1);
handled = 1; handled = 1;
# ifdef PNG_USER_LIMITS_SUPPORTED # ifdef PNG_USER_LIMITS_SUPPORTED
break; break;
}
# endif
} }
# endif
}
# else /* no store support: the chunk must be handled by the user callback */ # else /* no store support: the chunk must be handled by the user callback */
PNG_UNUSED(info_ptr) PNG_UNUSED(info_ptr)
# endif # endif
/* Regardless of the error handling below the cached data (if any) can be /* Regardless of the error handling below the cached data (if any) can be
@ -3040,13 +3044,13 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
end_ptr = dp + PNG_ROWBYTES(pixel_depth, row_width) - 1; end_ptr = dp + PNG_ROWBYTES(pixel_depth, row_width) - 1;
end_byte = *end_ptr; end_byte = *end_ptr;
# ifdef PNG_READ_PACKSWAP_SUPPORTED # ifdef PNG_READ_PACKSWAP_SUPPORTED
if ((png_ptr->transformations & PNG_PACKSWAP) != 0) if ((png_ptr->transformations & PNG_PACKSWAP) != 0)
/* little-endian byte */ /* little-endian byte */
end_mask = 0xff << end_mask; end_mask = 0xff << end_mask;
else /* big-endian byte */ else /* big-endian byte */
# endif # endif
end_mask = 0xff >> end_mask; end_mask = 0xff >> end_mask;
/* end_mask is now the bits to *keep* from the destination row */ /* end_mask is now the bits to *keep* from the destination row */
} }
@ -3204,12 +3208,12 @@ png_combine_row(png_const_structrp png_ptr, png_bytep dp, int display)
png_uint_32 mask; png_uint_32 mask;
# ifdef PNG_READ_PACKSWAP_SUPPORTED # ifdef PNG_READ_PACKSWAP_SUPPORTED
if ((png_ptr->transformations & PNG_PACKSWAP) != 0) if ((png_ptr->transformations & PNG_PACKSWAP) != 0)
mask = MASK(pass, pixel_depth, display, 0); mask = MASK(pass, pixel_depth, display, 0);
else else
# endif # endif
mask = MASK(pass, pixel_depth, display, 1); mask = MASK(pass, pixel_depth, display, 1);
for (;;) for (;;)
{ {
@ -3810,15 +3814,15 @@ png_read_filter_row_paeth_1byte_pixel(png_row_infop row_info, png_bytep row,
p = b - c; p = b - c;
pc = a - c; pc = a - c;
# ifdef PNG_USE_ABS #ifdef PNG_USE_ABS
pa = abs(p); pa = abs(p);
pb = abs(pc); pb = abs(pc);
pc = abs(p + pc); pc = abs(p + pc);
# else #else
pa = p < 0 ? -p : p; pa = p < 0 ? -p : p;
pb = pc < 0 ? -pc : pc; pb = pc < 0 ? -pc : pc;
pc = (p + pc) < 0 ? -(p + pc) : p + pc; pc = (p + pc) < 0 ? -(p + pc) : p + pc;
# endif #endif
/* Find the best predictor, the least of pa, pb, pc favoring the earlier /* Find the best predictor, the least of pa, pb, pc favoring the earlier
* ones in the case of a tie. * ones in the case of a tie.
@ -3865,15 +3869,15 @@ png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row,
p = b - c; p = b - c;
pc = a - c; pc = a - c;
# ifdef PNG_USE_ABS #ifdef PNG_USE_ABS
pa = abs(p); pa = abs(p);
pb = abs(pc); pb = abs(pc);
pc = abs(p + pc); pc = abs(p + pc);
# else #else
pa = p < 0 ? -p : p; pa = p < 0 ? -p : p;
pb = pc < 0 ? -pc : pc; pb = pc < 0 ? -pc : pc;
pc = (p + pc) < 0 ? -(p + pc) : p + pc; pc = (p + pc) < 0 ? -(p + pc) : p + pc;
# endif #endif
if (pb < pa) pa = pb, a = b; if (pb < pa) pa = pb, a = b;
if (pc < pa) a = c; if (pc < pa) a = c;
@ -4278,18 +4282,18 @@ png_read_start_row(png_structrp png_ptr)
#ifdef PNG_READ_EXPAND_16_SUPPORTED #ifdef PNG_READ_EXPAND_16_SUPPORTED
if ((png_ptr->transformations & PNG_EXPAND_16) != 0) if ((png_ptr->transformations & PNG_EXPAND_16) != 0)
{ {
# ifdef PNG_READ_EXPAND_SUPPORTED # ifdef PNG_READ_EXPAND_SUPPORTED
/* In fact it is an error if it isn't supported, but checking is /* In fact it is an error if it isn't supported, but checking is
* the safe way. * the safe way.
*/ */
if ((png_ptr->transformations & PNG_EXPAND) != 0) if ((png_ptr->transformations & PNG_EXPAND) != 0)
{ {
if (png_ptr->bit_depth < 16) if (png_ptr->bit_depth < 16)
max_pixel_depth *= 2; max_pixel_depth *= 2;
} }
else else
# endif # endif
png_ptr->transformations &= ~PNG_EXPAND_16; png_ptr->transformations &= ~PNG_EXPAND_16;
} }
#endif #endif

75
GRRLIB/lib/png/pngset.c
View file

@ -1,8 +1,8 @@
/* pngset.c - storage of image information into info struct /* pngset.c - storage of image information into info struct
* *
* Last changed in libpng 1.6.15 [November 20, 2014] * Last changed in libpng 1.6.18 [July 23, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -190,6 +190,7 @@ png_set_hIST(png_const_structrp png_ptr, png_inforp info_ptr,
if (info_ptr->hist == NULL) if (info_ptr->hist == NULL)
{ {
png_warning(png_ptr, "Insufficient memory for hIST chunk data"); png_warning(png_ptr, "Insufficient memory for hIST chunk data");
return; return;
} }
@ -271,7 +272,7 @@ png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr,
png_debug1(1, "in %s storage function", "pCAL"); png_debug1(1, "in %s storage function", "pCAL");
if (png_ptr == NULL || info_ptr == NULL || purpose == NULL || units == NULL if (png_ptr == NULL || info_ptr == NULL || purpose == NULL || units == NULL
|| (nparams > 0 && params == NULL)) || (nparams > 0 && params == NULL))
return; return;
length = strlen(purpose) + 1; length = strlen(purpose) + 1;
@ -301,6 +302,7 @@ png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr,
if (info_ptr->pcal_purpose == NULL) if (info_ptr->pcal_purpose == NULL)
{ {
png_warning(png_ptr, "Insufficient memory for pCAL purpose"); png_warning(png_ptr, "Insufficient memory for pCAL purpose");
return; return;
} }
@ -322,6 +324,7 @@ png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr,
if (info_ptr->pcal_units == NULL) if (info_ptr->pcal_units == NULL)
{ {
png_warning(png_ptr, "Insufficient memory for pCAL units"); png_warning(png_ptr, "Insufficient memory for pCAL units");
return; return;
} }
@ -333,6 +336,7 @@ png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr,
if (info_ptr->pcal_params == NULL) if (info_ptr->pcal_params == NULL)
{ {
png_warning(png_ptr, "Insufficient memory for pCAL params"); png_warning(png_ptr, "Insufficient memory for pCAL params");
return; return;
} }
@ -349,6 +353,7 @@ png_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr,
if (info_ptr->pcal_params[i] == NULL) if (info_ptr->pcal_params[i] == NULL)
{ {
png_warning(png_ptr, "Insufficient memory for pCAL parameter"); png_warning(png_ptr, "Insufficient memory for pCAL parameter");
return; return;
} }
@ -398,6 +403,7 @@ png_set_sCAL_s(png_const_structrp png_ptr, png_inforp info_ptr,
if (info_ptr->scal_s_width == NULL) if (info_ptr->scal_s_width == NULL)
{ {
png_warning(png_ptr, "Memory allocation failed while processing sCAL"); png_warning(png_ptr, "Memory allocation failed while processing sCAL");
return; return;
} }
@ -416,6 +422,7 @@ png_set_sCAL_s(png_const_structrp png_ptr, png_inforp info_ptr,
info_ptr->scal_s_width = NULL; info_ptr->scal_s_width = NULL;
png_warning(png_ptr, "Memory allocation failed while processing sCAL"); png_warning(png_ptr, "Memory allocation failed while processing sCAL");
return; return;
} }
@ -519,6 +526,7 @@ png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr,
else else
{ {
png_warning(png_ptr, "Invalid palette length"); png_warning(png_ptr, "Invalid palette length");
return; return;
} }
} }
@ -531,7 +539,6 @@ png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr,
)) ))
{ {
png_error(png_ptr, "Invalid palette"); png_error(png_ptr, "Invalid palette");
return;
} }
/* It may not actually be necessary to set png_ptr->palette here; /* It may not actually be necessary to set png_ptr->palette here;
@ -655,6 +662,7 @@ png_set_iCCP(png_const_structrp png_ptr, png_inforp info_ptr,
if (new_iccp_name == NULL) if (new_iccp_name == NULL)
{ {
png_benign_error(png_ptr, "Insufficient memory to process iCCP chunk"); png_benign_error(png_ptr, "Insufficient memory to process iCCP chunk");
return; return;
} }
@ -665,9 +673,9 @@ png_set_iCCP(png_const_structrp png_ptr, png_inforp info_ptr,
if (new_iccp_profile == NULL) if (new_iccp_profile == NULL)
{ {
png_free(png_ptr, new_iccp_name); png_free(png_ptr, new_iccp_name);
new_iccp_name = NULL;
png_benign_error(png_ptr, png_benign_error(png_ptr,
"Insufficient memory to process iCCP profile"); "Insufficient memory to process iCCP profile");
return; return;
} }
@ -701,7 +709,7 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
{ {
int i; int i;
png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" : png_debug1(1, "in %lx storage function", png_ptr == NULL ? 0xabadca11 :
(unsigned long)png_ptr->chunk_name); (unsigned long)png_ptr->chunk_name);
if (png_ptr == NULL || info_ptr == NULL || num_text <= 0 || text_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL || num_text <= 0 || text_ptr == NULL)
@ -743,6 +751,7 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
{ {
png_chunk_report(png_ptr, "too many text chunks", png_chunk_report(png_ptr, "too many text chunks",
PNG_CHUNK_WRITE_ERROR); PNG_CHUNK_WRITE_ERROR);
return 1; return 1;
} }
@ -798,7 +807,7 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
else else
lang_key_len = 0; lang_key_len = 0;
} }
# else /* PNG_iTXt_SUPPORTED */ # else /* iTXt */
{ {
png_chunk_report(png_ptr, "iTXt chunk not supported", png_chunk_report(png_ptr, "iTXt chunk not supported",
PNG_CHUNK_WRITE_ERROR); PNG_CHUNK_WRITE_ERROR);
@ -831,6 +840,7 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
{ {
png_chunk_report(png_ptr, "text chunk: out of memory", png_chunk_report(png_ptr, "text chunk: out of memory",
PNG_CHUNK_WRITE_ERROR); PNG_CHUNK_WRITE_ERROR);
return 1; return 1;
} }
@ -904,6 +914,7 @@ png_set_tIME(png_const_structrp png_ptr, png_inforp info_ptr,
mod_time->second > 60) mod_time->second > 60)
{ {
png_warning(png_ptr, "Ignoring invalid time value"); png_warning(png_ptr, "Ignoring invalid time value");
return; return;
} }
@ -920,6 +931,7 @@ png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr,
png_debug1(1, "in %s storage function", "tRNS"); png_debug1(1, "in %s storage function", "tRNS");
if (png_ptr == NULL || info_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL)
return; return;
if (trans_alpha != NULL) if (trans_alpha != NULL)
@ -945,16 +957,21 @@ png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr,
if (trans_color != NULL) if (trans_color != NULL)
{ {
int sample_max = (1 << info_ptr->bit_depth); #ifdef PNG_WARNINGS_SUPPORTED
if (info_ptr->bit_depth < 16)
{
int sample_max = (1 << info_ptr->bit_depth) - 1;
if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
trans_color->gray > sample_max) || trans_color->gray > sample_max) ||
(info_ptr->color_type == PNG_COLOR_TYPE_RGB && (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
(trans_color->red > sample_max || (trans_color->red > sample_max ||
trans_color->green > sample_max || trans_color->green > sample_max ||
trans_color->blue > sample_max))) trans_color->blue > sample_max)))
png_warning(png_ptr, png_warning(png_ptr,
"tRNS chunk has out-of-range samples for bit_depth"); "tRNS chunk has out-of-range samples for bit_depth");
}
#endif
info_ptr->trans_color = *trans_color; info_ptr->trans_color = *trans_color;
@ -1001,6 +1018,7 @@ png_set_sPLT(png_const_structrp png_ptr,
{ {
/* Out of memory or too many chunks */ /* Out of memory or too many chunks */
png_chunk_report(png_ptr, "too many sPLT chunks", PNG_CHUNK_WRITE_ERROR); png_chunk_report(png_ptr, "too many sPLT chunks", PNG_CHUNK_WRITE_ERROR);
return; return;
} }
@ -1116,7 +1134,7 @@ png_set_unknown_chunks(png_const_structrp png_ptr,
png_unknown_chunkp np; png_unknown_chunkp np;
if (png_ptr == NULL || info_ptr == NULL || num_unknowns <= 0 || if (png_ptr == NULL || info_ptr == NULL || num_unknowns <= 0 ||
unknowns == NULL) unknowns == NULL)
return; return;
/* Check for the failure cases where support has been disabled at compile /* Check for the failure cases where support has been disabled at compile
@ -1130,6 +1148,7 @@ png_set_unknown_chunks(png_const_structrp png_ptr,
if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0)
{ {
png_app_error(png_ptr, "no unknown chunk support on read"); png_app_error(png_ptr, "no unknown chunk support on read");
return; return;
} }
# endif # endif
@ -1138,6 +1157,7 @@ png_set_unknown_chunks(png_const_structrp png_ptr,
if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0) if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0)
{ {
png_app_error(png_ptr, "no unknown chunk support on write"); png_app_error(png_ptr, "no unknown chunk support on write");
return; return;
} }
# endif # endif
@ -1155,6 +1175,7 @@ png_set_unknown_chunks(png_const_structrp png_ptr,
{ {
png_chunk_report(png_ptr, "too many unknown chunks", png_chunk_report(png_ptr, "too many unknown chunks",
PNG_CHUNK_WRITE_ERROR); PNG_CHUNK_WRITE_ERROR);
return; return;
} }
@ -1232,8 +1253,7 @@ png_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr,
check_location(png_ptr, location); check_location(png_ptr, location);
} }
} }
#endif #endif /* STORE_UNKNOWN_CHUNKS */
#ifdef PNG_MNG_FEATURES_SUPPORTED #ifdef PNG_MNG_FEATURES_SUPPORTED
png_uint_32 PNGAPI png_uint_32 PNGAPI
@ -1264,6 +1284,7 @@ add_one_chunk(png_bytep list, unsigned int count, png_const_bytep add, int keep)
if (memcmp(list, add, 4) == 0) if (memcmp(list, add, 4) == 0)
{ {
list[4] = (png_byte)keep; list[4] = (png_byte)keep;
return count; return count;
} }
} }
@ -1291,6 +1312,7 @@ png_set_keep_unknown_chunks(png_structrp png_ptr, int keep,
if (keep < 0 || keep >= PNG_HANDLE_CHUNK_LAST) if (keep < 0 || keep >= PNG_HANDLE_CHUNK_LAST)
{ {
png_app_error(png_ptr, "png_set_keep_unknown_chunks: invalid keep"); png_app_error(png_ptr, "png_set_keep_unknown_chunks: invalid keep");
return; return;
} }
@ -1340,6 +1362,7 @@ png_set_keep_unknown_chunks(png_structrp png_ptr, int keep,
* which can be switched off. * which can be switched off.
*/ */
png_app_error(png_ptr, "png_set_keep_unknown_chunks: no chunk list"); png_app_error(png_ptr, "png_set_keep_unknown_chunks: no chunk list");
return; return;
} }
@ -1355,6 +1378,7 @@ png_set_keep_unknown_chunks(png_structrp png_ptr, int keep,
if (num_chunks + old_num_chunks > UINT_MAX/5) if (num_chunks + old_num_chunks > UINT_MAX/5)
{ {
png_app_error(png_ptr, "png_set_keep_unknown_chunks: too many chunks"); png_app_error(png_ptr, "png_set_keep_unknown_chunks: too many chunks");
return; return;
} }
@ -1492,23 +1516,30 @@ png_set_compression_buffer_size(png_structrp png_ptr, png_size_t size)
{ {
png_warning(png_ptr, png_warning(png_ptr,
"Compression buffer size cannot be changed because it is in use"); "Compression buffer size cannot be changed because it is in use");
return; return;
} }
#ifndef __COVERITY__
/* Some compilers complain that this is always false. However, it
* can be true when integer overflow happens.
*/
if (size > ZLIB_IO_MAX) if (size > ZLIB_IO_MAX)
{ {
png_warning(png_ptr, png_warning(png_ptr,
"Compression buffer size limited to system maximum"); "Compression buffer size limited to system maximum");
size = ZLIB_IO_MAX; /* must fit */ size = ZLIB_IO_MAX; /* must fit */
} }
#endif
else if (size < 6) if (size < 6)
{ {
/* Deflate will potentially go into an infinite loop on a SYNC_FLUSH /* Deflate will potentially go into an infinite loop on a SYNC_FLUSH
* if this is permitted. * if this is permitted.
*/ */
png_warning(png_ptr, png_warning(png_ptr,
"Compression buffer size cannot be reduced below 6"); "Compression buffer size cannot be reduced below 6");
return; return;
} }
@ -1550,8 +1581,8 @@ png_set_user_limits (png_structrp png_ptr, png_uint_32 user_width_max,
void PNGAPI void PNGAPI
png_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max) png_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max)
{ {
if (png_ptr != NULL) if (png_ptr != NULL)
png_ptr->user_chunk_cache_max = user_chunk_cache_max; png_ptr->user_chunk_cache_max = user_chunk_cache_max;
} }
/* This function was added to libpng 1.4.1 */ /* This function was added to libpng 1.4.1 */

35
GRRLIB/lib/png/pngstruct.h
View file

@ -1,12 +1,11 @@
/* pngstruct.h - header file for PNG reference library /* pngstruct.h - header file for PNG reference library
* *
* Copyright (c) 1998-2013 Glenn Randers-Pehrson * Last changed in libpng 1.6.18 [July 23, 2015]
* Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
* Last changed in libpng 1.6.1 [March 28, 2013]
*
* This code is released under the libpng license. * This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer * For conditions of distribution and use, see the disclaimer
* and license in png.h * and license in png.h
@ -101,7 +100,7 @@ typedef struct png_XYZ
#endif /* COLORSPACE */ #endif /* COLORSPACE */
#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED) #if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED)
/* A colorspace is all the above plus, potentially, profile information, /* A colorspace is all the above plus, potentially, profile information;
* however at present libpng does not use the profile internally so it is only * however at present libpng does not use the profile internally so it is only
* stored in the png_info struct (if iCCP is supported.) The rendering intent * stored in the png_info struct (if iCCP is supported.) The rendering intent
* is retained here and is checked. * is retained here and is checked.
@ -220,16 +219,18 @@ struct png_struct_def
png_uint_32 row_number; /* current row in interlace pass */ png_uint_32 row_number; /* current row in interlace pass */
png_uint_32 chunk_name; /* PNG_CHUNK() id of current chunk */ png_uint_32 chunk_name; /* PNG_CHUNK() id of current chunk */
png_bytep prev_row; /* buffer to save previous (unfiltered) row. png_bytep prev_row; /* buffer to save previous (unfiltered) row.
* This is a pointer into big_prev_row * While reading this is a pointer into
* big_prev_row; while writing it is separately
* allocated if needed.
*/ */
png_bytep row_buf; /* buffer to save current (unfiltered) row. png_bytep row_buf; /* buffer to save current (unfiltered) row.
* This is a pointer into big_row_buf * While reading, this is a pointer into
* big_row_buf; while writing it is separately
* allocated.
*/ */
#ifdef PNG_WRITE_SUPPORTED #ifdef PNG_WRITE_FILTER_SUPPORTED
png_bytep sub_row; /* buffer to save "sub" row when filtering */ png_bytep try_row; /* buffer to save trial row when filtering */
png_bytep up_row; /* buffer to save "up" row when filtering */ png_bytep tst_row; /* buffer to save best trial row when filtering */
png_bytep avg_row; /* buffer to save "avg" row when filtering */
png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */
#endif #endif
png_size_t info_rowbytes; /* Added in 1.5.4: cache of updated row bytes */ png_size_t info_rowbytes; /* Added in 1.5.4: cache of updated row bytes */
@ -347,17 +348,7 @@ struct png_struct_def
png_bytep quantize_index; /* index translation for palette files */ png_bytep quantize_index; /* index translation for palette files */
#endif #endif
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* Options */
png_byte heuristic_method; /* heuristic for row filter selection */
png_byte num_prev_filters; /* number of weights for previous rows */
png_bytep prev_filters; /* filter type(s) of previous row(s) */
png_uint_16p filter_weights; /* weight(s) for previous line(s) */
png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */
png_uint_16p filter_costs; /* relative filter calculation cost */
png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */
#endif
/* Options */
#ifdef PNG_SET_OPTION_SUPPORTED #ifdef PNG_SET_OPTION_SUPPORTED
png_byte options; /* On/off state (up to 4 options) */ png_byte options; /* On/off state (up to 4 options) */
#endif #endif

6
GRRLIB/lib/png/pngtrans.c
View file

@ -1,8 +1,8 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers) /* pngtrans.c - transforms the data in a row (used by both readers and writers)
* *
* Last changed in libpng 1.6.15 [November 20, 2014] * Last changed in libpng 1.6.18 [July 23, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -704,7 +704,7 @@ png_do_check_palette_indexes(png_structrp png_ptr, png_row_infop row_info)
*/ */
for (; rp > png_ptr->row_buf; rp--) for (; rp > png_ptr->row_buf; rp--)
{ {
if (*rp >> padding != 0) if ((*rp >> padding) != 0)
png_ptr->num_palette_max = 1; png_ptr->num_palette_max = 1;
padding = 0; padding = 0;
} }

631
GRRLIB/lib/png/pngwrite.c
View file

@ -1,8 +1,8 @@
/* pngwrite.c - general routines to write a PNG file /* pngwrite.c - general routines to write a PNG file
* *
* Last changed in libpng 1.6.15 [November 20, 2014] * Last changed in libpng 1.6.18 [July 23, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -90,43 +90,44 @@ png_write_info_before_PLTE(png_structrp png_ptr, png_const_inforp info_ptr)
if ((png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE) == 0) if ((png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE) == 0)
{ {
/* Write PNG signature */ /* Write PNG signature */
png_write_sig(png_ptr); png_write_sig(png_ptr);
#ifdef PNG_MNG_FEATURES_SUPPORTED #ifdef PNG_MNG_FEATURES_SUPPORTED
if ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) != 0 && \ if ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) != 0 && \
png_ptr->mng_features_permitted != 0) png_ptr->mng_features_permitted != 0)
{ {
png_warning(png_ptr, "MNG features are not allowed in a PNG datastream"); png_warning(png_ptr,
png_ptr->mng_features_permitted = 0; "MNG features are not allowed in a PNG datastream");
} png_ptr->mng_features_permitted = 0;
}
#endif #endif
/* Write IHDR information. */ /* Write IHDR information. */
png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height, png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type, info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type,
info_ptr->filter_type, info_ptr->filter_type,
#ifdef PNG_WRITE_INTERLACING_SUPPORTED #ifdef PNG_WRITE_INTERLACING_SUPPORTED
info_ptr->interlace_type info_ptr->interlace_type
#else #else
0 0
#endif #endif
); );
/* The rest of these check to see if the valid field has the appropriate /* The rest of these check to see if the valid field has the appropriate
* flag set, and if it does, writes the chunk. * flag set, and if it does, writes the chunk.
* *
* 1.6.0: COLORSPACE support controls the writing of these chunks too, and * 1.6.0: COLORSPACE support controls the writing of these chunks too, and
* the chunks will be written if the WRITE routine is there and information * the chunks will be written if the WRITE routine is there and
* is available in the COLORSPACE. (See png_colorspace_sync_info in png.c * information * is available in the COLORSPACE. (See
* for where the valid flags get set.) * png_colorspace_sync_info in png.c for where the valid flags get set.)
* *
* Under certain circumstances the colorspace can be invalidated without * Under certain circumstances the colorspace can be invalidated without
* syncing the info_struct 'valid' flags; this happens if libpng detects and * syncing the info_struct 'valid' flags; this happens if libpng detects
* error and calls png_error while the color space is being set, yet the * an error and calls png_error while the color space is being set, yet
* application continues writing the PNG. So check the 'invalid' flag here * the application continues writing the PNG. So check the 'invalid'
* too. * flag here too.
*/ */
#ifdef PNG_GAMMA_SUPPORTED #ifdef PNG_GAMMA_SUPPORTED
# ifdef PNG_WRITE_gAMA_SUPPORTED # ifdef PNG_WRITE_gAMA_SUPPORTED
if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 && if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 &&
@ -137,50 +138,50 @@ png_write_info_before_PLTE(png_structrp png_ptr, png_const_inforp info_ptr)
#endif #endif
#ifdef PNG_COLORSPACE_SUPPORTED #ifdef PNG_COLORSPACE_SUPPORTED
/* Write only one of sRGB or an ICC profile. If a profile was supplied /* Write only one of sRGB or an ICC profile. If a profile was supplied
* and it matches one of the known sRGB ones issue a warning. * and it matches one of the known sRGB ones issue a warning.
*/ */
# ifdef PNG_WRITE_iCCP_SUPPORTED # ifdef PNG_WRITE_iCCP_SUPPORTED
if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 && if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 &&
(info_ptr->valid & PNG_INFO_iCCP) != 0) (info_ptr->valid & PNG_INFO_iCCP) != 0)
{ {
# ifdef PNG_WRITE_sRGB_SUPPORTED # ifdef PNG_WRITE_sRGB_SUPPORTED
if ((info_ptr->valid & PNG_INFO_sRGB) != 0) if ((info_ptr->valid & PNG_INFO_sRGB) != 0)
png_app_warning(png_ptr, png_app_warning(png_ptr,
"profile matches sRGB but writing iCCP instead"); "profile matches sRGB but writing iCCP instead");
# endif # endif
png_write_iCCP(png_ptr, info_ptr->iccp_name, png_write_iCCP(png_ptr, info_ptr->iccp_name,
info_ptr->iccp_profile); info_ptr->iccp_profile);
} }
# ifdef PNG_WRITE_sRGB_SUPPORTED # ifdef PNG_WRITE_sRGB_SUPPORTED
else else
# endif # endif
# endif # endif
# ifdef PNG_WRITE_sRGB_SUPPORTED # ifdef PNG_WRITE_sRGB_SUPPORTED
if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 && if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 &&
(info_ptr->valid & PNG_INFO_sRGB) != 0) (info_ptr->valid & PNG_INFO_sRGB) != 0)
png_write_sRGB(png_ptr, info_ptr->colorspace.rendering_intent); png_write_sRGB(png_ptr, info_ptr->colorspace.rendering_intent);
# endif /* WRITE_sRGB */ # endif /* WRITE_sRGB */
#endif /* COLORSPACE */ #endif /* COLORSPACE */
#ifdef PNG_WRITE_sBIT_SUPPORTED #ifdef PNG_WRITE_sBIT_SUPPORTED
if ((info_ptr->valid & PNG_INFO_sBIT) != 0) if ((info_ptr->valid & PNG_INFO_sBIT) != 0)
png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type); png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type);
#endif #endif
#ifdef PNG_COLORSPACE_SUPPORTED #ifdef PNG_COLORSPACE_SUPPORTED
# ifdef PNG_WRITE_cHRM_SUPPORTED # ifdef PNG_WRITE_cHRM_SUPPORTED
if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 && if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 &&
(info_ptr->colorspace.flags & PNG_COLORSPACE_FROM_cHRM) != 0 && (info_ptr->colorspace.flags & PNG_COLORSPACE_FROM_cHRM) != 0 &&
(info_ptr->valid & PNG_INFO_cHRM) != 0) (info_ptr->valid & PNG_INFO_cHRM) != 0)
png_write_cHRM_fixed(png_ptr, &info_ptr->colorspace.end_points_xy); png_write_cHRM_fixed(png_ptr, &info_ptr->colorspace.end_points_xy);
# endif # endif
#endif #endif
#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
write_unknown_chunks(png_ptr, info_ptr, PNG_HAVE_IHDR); write_unknown_chunks(png_ptr, info_ptr, PNG_HAVE_IHDR);
#endif #endif
png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE; png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE;
@ -216,8 +217,13 @@ png_write_info(png_structrp png_ptr, png_const_inforp info_ptr)
if ((png_ptr->transformations & PNG_INVERT_ALPHA) != 0 && if ((png_ptr->transformations & PNG_INVERT_ALPHA) != 0 &&
info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{ {
int j; int j, jend;
for (j = 0; j<(int)info_ptr->num_trans; j++)
jend = info_ptr->num_trans;
if (jend > PNG_MAX_PALETTE_LENGTH)
jend = PNG_MAX_PALETTE_LENGTH;
for (j = 0; j<jend; ++j)
info_ptr->trans_alpha[j] = info_ptr->trans_alpha[j] =
(png_byte)(255 - info_ptr->trans_alpha[j]); (png_byte)(255 - info_ptr->trans_alpha[j]);
} }
@ -538,7 +544,7 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
/* App warnings are warnings in release (or release candidate) builds but /* App warnings are warnings in release (or release candidate) builds but
* are errors during development. * are errors during development.
*/ */
#if PNG_LIBPNG_BUILD_BASE_TYPE >= PNG_LIBPNG_BUILD_RC #if PNG_RELEASE_BUILD
png_ptr->flags |= PNG_FLAG_APP_WARNINGS_WARN; png_ptr->flags |= PNG_FLAG_APP_WARNINGS_WARN;
#endif #endif
@ -638,8 +644,8 @@ png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
{ {
*(rp) = (png_byte)((*rp - *(rp + 1)) & 0xff); *(rp) = (png_byte)(*rp - *(rp + 1));
*(rp + 2) = (png_byte)((*(rp + 2) - *(rp + 1)) & 0xff); *(rp + 2) = (png_byte)(*(rp + 2) - *(rp + 1));
} }
} }
@ -665,10 +671,10 @@ png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5);
png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL); png_uint_32 red = (png_uint_32)((s0 - s1) & 0xffffL);
png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL); png_uint_32 blue = (png_uint_32)((s2 - s1) & 0xffffL);
*(rp ) = (png_byte)((red >> 8) & 0xff); *(rp ) = (png_byte)(red >> 8);
*(rp + 1) = (png_byte)(red & 0xff); *(rp + 1) = (png_byte)red;
*(rp + 4) = (png_byte)((blue >> 8) & 0xff); *(rp + 4) = (png_byte)(blue >> 8);
*(rp + 5) = (png_byte)(blue & 0xff); *(rp + 5) = (png_byte)blue;
} }
} }
#endif /* WRITE_16BIT */ #endif /* WRITE_16BIT */
@ -849,7 +855,7 @@ png_write_row(png_structrp png_ptr, png_const_bytep row)
* which is also the output depth. * which is also the output depth.
*/ */
if (row_info.pixel_depth != png_ptr->pixel_depth || if (row_info.pixel_depth != png_ptr->pixel_depth ||
row_info.pixel_depth != png_ptr->transformed_pixel_depth) row_info.pixel_depth != png_ptr->transformed_pixel_depth)
png_error(png_ptr, "internal write transform logic error"); png_error(png_ptr, "internal write transform logic error");
#ifdef PNG_MNG_FEATURES_SUPPORTED #ifdef PNG_MNG_FEATURES_SUPPORTED
@ -917,10 +923,6 @@ png_write_flush(png_structrp png_ptr)
} }
#endif /* WRITE_FLUSH */ #endif /* WRITE_FLUSH */
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
static void png_reset_filter_heuristics(png_structrp png_ptr);/* forward decl */
#endif
/* Free any memory used in png_ptr struct without freeing the struct itself. */ /* Free any memory used in png_ptr struct without freeing the struct itself. */
static void static void
png_write_destroy(png_structrp png_ptr) png_write_destroy(png_structrp png_ptr)
@ -937,24 +939,11 @@ png_write_destroy(png_structrp png_ptr)
png_ptr->row_buf = NULL; png_ptr->row_buf = NULL;
#ifdef PNG_WRITE_FILTER_SUPPORTED #ifdef PNG_WRITE_FILTER_SUPPORTED
png_free(png_ptr, png_ptr->prev_row); png_free(png_ptr, png_ptr->prev_row);
png_free(png_ptr, png_ptr->sub_row); png_free(png_ptr, png_ptr->try_row);
png_free(png_ptr, png_ptr->up_row); png_free(png_ptr, png_ptr->tst_row);
png_free(png_ptr, png_ptr->avg_row);
png_free(png_ptr, png_ptr->paeth_row);
png_ptr->prev_row = NULL; png_ptr->prev_row = NULL;
png_ptr->sub_row = NULL; png_ptr->try_row = NULL;
png_ptr->up_row = NULL; png_ptr->tst_row = NULL;
png_ptr->avg_row = NULL;
png_ptr->paeth_row = NULL;
#endif
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
/* Use this to save a little code space, it doesn't free the filter_costs */
png_reset_filter_heuristics(png_ptr);
png_free(png_ptr, png_ptr->filter_costs);
png_free(png_ptr, png_ptr->inv_filter_costs);
png_ptr->filter_costs = NULL;
png_ptr->inv_filter_costs = NULL;
#endif #endif
#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
@ -1044,211 +1033,85 @@ png_set_filter(png_structrp png_ptr, int method, int filters)
#endif /* WRITE_FILTER */ #endif /* WRITE_FILTER */
} }
#ifdef PNG_WRITE_FILTER_SUPPORTED
/* If we have allocated the row_buf, this means we have already started /* If we have allocated the row_buf, this means we have already started
* with the image and we should have allocated all of the filter buffers * with the image and we should have allocated all of the filter buffers
* that have been selected. If prev_row isn't already allocated, then * that have been selected. If prev_row isn't already allocated, then
* it is too late to start using the filters that need it, since we * it is too late to start using the filters that need it, since we
* will be missing the data in the previous row. If an application * will be missing the data in the previous row. If an application
* wants to start and stop using particular filters during compression, * wants to start and stop using particular filters during compression,
* it should start out with all of the filters, and then add and * it should start out with all of the filters, and then remove them
* remove them after the start of compression. * or add them back after the start of compression.
*
* NOTE: this is a nasty constraint on the code, because it means that the
* prev_row buffer must be maintained even if there are currently no
* 'prev_row' requiring filters active.
*/ */
if (png_ptr->row_buf != NULL) if (png_ptr->row_buf != NULL)
{ {
#ifdef PNG_WRITE_FILTER_SUPPORTED int num_filters;
if ((png_ptr->do_filter & PNG_FILTER_SUB) != 0 && png_alloc_size_t buf_size;
png_ptr->sub_row == NULL)
/* Repeat the checks in png_write_start_row; 1 pixel high or wide
* images cannot benefit from certain filters. If this isn't done here
* the check below will fire on 1 pixel high images.
*/
if (png_ptr->height == 1)
filters &= ~(PNG_FILTER_UP|PNG_FILTER_AVG|PNG_FILTER_PAETH);
if (png_ptr->width == 1)
filters &= ~(PNG_FILTER_SUB|PNG_FILTER_AVG|PNG_FILTER_PAETH);
if ((filters & (PNG_FILTER_UP|PNG_FILTER_AVG|PNG_FILTER_PAETH)) != 0
&& png_ptr->prev_row == NULL)
{ {
png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, /* This is the error case, however it is benign - the previous row
(png_ptr->rowbytes + 1)); * is not available so the filter can't be used. Just warn here.
png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB; */
png_app_warning(png_ptr,
"png_set_filter: UP/AVG/PAETH cannot be added after start");
filters &= ~(PNG_FILTER_UP|PNG_FILTER_AVG|PNG_FILTER_PAETH);
} }
if ((png_ptr->do_filter & PNG_FILTER_UP) != 0 && num_filters = 0;
png_ptr->up_row == NULL)
if (filters & PNG_FILTER_SUB)
num_filters++;
if (filters & PNG_FILTER_UP)
num_filters++;
if (filters & PNG_FILTER_AVG)
num_filters++;
if (filters & PNG_FILTER_PAETH)
num_filters++;
/* Allocate needed row buffers if they have not already been
* allocated.
*/
buf_size = PNG_ROWBYTES(png_ptr->usr_channels * png_ptr->usr_bit_depth,
png_ptr->width) + 1;
if (png_ptr->try_row == NULL)
png_ptr->try_row = png_voidcast(png_bytep,
png_malloc(png_ptr, buf_size));
if (num_filters > 1)
{ {
if (png_ptr->prev_row == NULL) if (png_ptr->tst_row == NULL)
{ png_ptr->tst_row = png_voidcast(png_bytep,
png_warning(png_ptr, "Can't add Up filter after starting"); png_malloc(png_ptr, buf_size));
png_ptr->do_filter = (png_byte)(png_ptr->do_filter &
~PNG_FILTER_UP);
}
else
{
png_ptr->up_row = (png_bytep)png_malloc(png_ptr,
(png_ptr->rowbytes + 1));
png_ptr->up_row[0] = PNG_FILTER_VALUE_UP;
}
} }
if ((png_ptr->do_filter & PNG_FILTER_AVG) != 0 &&
png_ptr->avg_row == NULL)
{
if (png_ptr->prev_row == NULL)
{
png_warning(png_ptr, "Can't add Average filter after starting");
png_ptr->do_filter = (png_byte)(png_ptr->do_filter &
~PNG_FILTER_AVG);
}
else
{
png_ptr->avg_row = (png_bytep)png_malloc(png_ptr,
(png_ptr->rowbytes + 1));
png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG;
}
}
if ((png_ptr->do_filter & PNG_FILTER_PAETH) != 0 &&
png_ptr->paeth_row == NULL)
{
if (png_ptr->prev_row == NULL)
{
png_warning(png_ptr, "Can't add Paeth filter after starting");
png_ptr->do_filter &= (png_byte)(~PNG_FILTER_PAETH);
}
else
{
png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr,
(png_ptr->rowbytes + 1));
png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
}
}
if (png_ptr->do_filter == PNG_NO_FILTERS)
#endif /* WRITE_FILTER */
png_ptr->do_filter = PNG_FILTER_NONE;
} }
png_ptr->do_filter = (png_byte)filters;
#endif
} }
else else
png_error(png_ptr, "Unknown custom filter method"); png_error(png_ptr, "Unknown custom filter method");
} }
/* This allows us to influence the way in which libpng chooses the "best" #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* DEPRECATED */
* filter for the current scanline. While the "minimum-sum-of-absolute-
* differences metric is relatively fast and effective, there is some
* question as to whether it can be improved upon by trying to keep the
* filtered data going to zlib more consistent, hopefully resulting in
* better compression.
*/
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */
/* Convenience reset API. */
static void
png_reset_filter_heuristics(png_structrp png_ptr)
{
/* Clear out any old values in the 'weights' - this must be done because if
* the app calls set_filter_heuristics multiple times with different
* 'num_weights' values we would otherwise potentially have wrong sized
* arrays.
*/
png_ptr->num_prev_filters = 0;
png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED;
if (png_ptr->prev_filters != NULL)
{
png_bytep old = png_ptr->prev_filters;
png_ptr->prev_filters = NULL;
png_free(png_ptr, old);
}
if (png_ptr->filter_weights != NULL)
{
png_uint_16p old = png_ptr->filter_weights;
png_ptr->filter_weights = NULL;
png_free(png_ptr, old);
}
if (png_ptr->inv_filter_weights != NULL)
{
png_uint_16p old = png_ptr->inv_filter_weights;
png_ptr->inv_filter_weights = NULL;
png_free(png_ptr, old);
}
/* Leave the filter_costs - this array is fixed size. */
}
static int
png_init_filter_heuristics(png_structrp png_ptr, int heuristic_method,
int num_weights)
{
if (png_ptr == NULL)
return 0;
/* Clear out the arrays */
png_reset_filter_heuristics(png_ptr);
/* Check arguments; the 'reset' function makes the correct settings for the
* unweighted case, but we must handle the weight case by initializing the
* arrays for the caller.
*/
if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int i;
if (num_weights > 0)
{
png_ptr->prev_filters = (png_bytep)png_malloc(png_ptr,
(png_uint_32)((sizeof (png_byte)) * num_weights));
/* To make sure that the weighting starts out fairly */
for (i = 0; i < num_weights; i++)
{
png_ptr->prev_filters[i] = 255;
}
png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)((sizeof (png_uint_16)) * num_weights));
png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)((sizeof (png_uint_16)) * num_weights));
for (i = 0; i < num_weights; i++)
{
png_ptr->inv_filter_weights[i] =
png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
}
/* Safe to set this now */
png_ptr->num_prev_filters = (png_byte)num_weights;
}
/* If, in the future, there are other filter methods, this would
* need to be based on png_ptr->filter.
*/
if (png_ptr->filter_costs == NULL)
{
png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)((sizeof (png_uint_16)) * PNG_FILTER_VALUE_LAST));
png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)((sizeof (png_uint_16)) * PNG_FILTER_VALUE_LAST));
}
for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
{
png_ptr->inv_filter_costs[i] =
png_ptr->filter_costs[i] = PNG_COST_FACTOR;
}
/* All the arrays are inited, safe to set this: */
png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_WEIGHTED;
/* Return the 'ok' code. */
return 1;
}
else if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT ||
heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED)
{
return 1;
}
else
{
png_warning(png_ptr, "Unknown filter heuristic method");
return 0;
}
}
/* Provide floating and fixed point APIs */ /* Provide floating and fixed point APIs */
#ifdef PNG_FLOATING_POINT_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI void PNGAPI
@ -1256,52 +1119,11 @@ png_set_filter_heuristics(png_structrp png_ptr, int heuristic_method,
int num_weights, png_const_doublep filter_weights, int num_weights, png_const_doublep filter_weights,
png_const_doublep filter_costs) png_const_doublep filter_costs)
{ {
png_debug(1, "in png_set_filter_heuristics"); PNG_UNUSED(png_ptr)
PNG_UNUSED(heuristic_method)
/* The internal API allocates all the arrays and ensures that the elements of PNG_UNUSED(num_weights)
* those arrays are set to the default value. PNG_UNUSED(filter_weights)
*/ PNG_UNUSED(filter_costs)
if (png_init_filter_heuristics(png_ptr, heuristic_method, num_weights) == 0)
return;
/* If using the weighted method copy in the weights. */
if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int i;
for (i = 0; i < num_weights; i++)
{
if (filter_weights[i] <= 0.0)
{
png_ptr->inv_filter_weights[i] =
png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
}
else
{
png_ptr->inv_filter_weights[i] =
(png_uint_16)(PNG_WEIGHT_FACTOR*filter_weights[i]+.5);
png_ptr->filter_weights[i] =
(png_uint_16)(PNG_WEIGHT_FACTOR/filter_weights[i]+.5);
}
}
/* Here is where we set the relative costs of the different filters. We
* should take the desired compression level into account when setting
* the costs, so that Paeth, for instance, has a high relative cost at low
* compression levels, while it has a lower relative cost at higher
* compression settings. The filter types are in order of increasing
* relative cost, so it would be possible to do this with an algorithm.
*/
for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) if (filter_costs[i] >= 1.0)
{
png_ptr->inv_filter_costs[i] =
(png_uint_16)(PNG_COST_FACTOR / filter_costs[i] + .5);
png_ptr->filter_costs[i] =
(png_uint_16)(PNG_COST_FACTOR * filter_costs[i] + .5);
}
}
} }
#endif /* FLOATING_POINT */ #endif /* FLOATING_POINT */
@ -1311,67 +1133,16 @@ png_set_filter_heuristics_fixed(png_structrp png_ptr, int heuristic_method,
int num_weights, png_const_fixed_point_p filter_weights, int num_weights, png_const_fixed_point_p filter_weights,
png_const_fixed_point_p filter_costs) png_const_fixed_point_p filter_costs)
{ {
png_debug(1, "in png_set_filter_heuristics_fixed"); PNG_UNUSED(png_ptr)
PNG_UNUSED(heuristic_method)
/* The internal API allocates all the arrays and ensures that the elements of PNG_UNUSED(num_weights)
* those arrays are set to the default value. PNG_UNUSED(filter_weights)
*/ PNG_UNUSED(filter_costs)
if (png_init_filter_heuristics(png_ptr, heuristic_method, num_weights) == 0)
return;
/* If using the weighted method copy in the weights. */
if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int i;
for (i = 0; i < num_weights; i++)
{
if (filter_weights[i] <= 0)
{
png_ptr->inv_filter_weights[i] =
png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
}
else
{
png_ptr->inv_filter_weights[i] = (png_uint_16)
((PNG_WEIGHT_FACTOR*filter_weights[i]+PNG_FP_HALF)/PNG_FP_1);
png_ptr->filter_weights[i] = (png_uint_16)((PNG_WEIGHT_FACTOR*
PNG_FP_1+(filter_weights[i]/2))/filter_weights[i]);
}
}
/* Here is where we set the relative costs of the different filters. We
* should take the desired compression level into account when setting
* the costs, so that Paeth, for instance, has a high relative cost at low
* compression levels, while it has a lower relative cost at higher
* compression settings. The filter types are in order of increasing
* relative cost, so it would be possible to do this with an algorithm.
*/
for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
if (filter_costs[i] >= PNG_FP_1)
{
png_uint_32 tmp;
/* Use a 32 bit unsigned temporary here because otherwise the
* intermediate value will be a 32 bit *signed* integer (ANSI rules)
* and this will get the wrong answer on division.
*/
tmp = PNG_COST_FACTOR*PNG_FP_1 + (filter_costs[i]/2);
tmp /= filter_costs[i];
png_ptr->inv_filter_costs[i] = (png_uint_16)tmp;
tmp = PNG_COST_FACTOR * filter_costs[i] + PNG_FP_HALF;
tmp /= PNG_FP_1;
png_ptr->filter_costs[i] = (png_uint_16)tmp;
}
}
} }
#endif /* FIXED_POINT */ #endif /* FIXED_POINT */
#endif /* WRITE_WEIGHTED_FILTER */ #endif /* WRITE_WEIGHTED_FILTER */
#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
void PNGAPI void PNGAPI
png_set_compression_level(png_structrp png_ptr, int level) png_set_compression_level(png_structrp png_ptr, int level)
{ {
@ -1417,8 +1188,8 @@ png_set_compression_window_bits(png_structrp png_ptr, int window_bits)
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
/* Prior to 1.6.0 this would warn but then set the window_bits value, this /* Prior to 1.6.0 this would warn but then set the window_bits value. This
* meant that negative window bits values could be selected which would cause * meant that negative window bits values could be selected that would cause
* libpng to write a non-standard PNG file with raw deflate or gzip * libpng to write a non-standard PNG file with raw deflate or gzip
* compressed IDAT or ancillary chunks. Such files can be read and there is * compressed IDAT or ancillary chunks. Such files can be read and there is
* no warning on read, so this seems like a very bad idea. * no warning on read, so this seems like a very bad idea.
@ -1454,6 +1225,7 @@ png_set_compression_method(png_structrp png_ptr, int method)
png_ptr->zlib_method = method; png_ptr->zlib_method = method;
} }
#endif /* WRITE_CUSTOMIZE_COMPRESSION */
/* The following were added to libpng-1.5.4 */ /* The following were added to libpng-1.5.4 */
#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
@ -1614,14 +1386,14 @@ png_write_png(png_structrp png_ptr, png_inforp info_ptr,
* alpha channel. * alpha channel.
*/ */
if ((transforms & (PNG_TRANSFORM_STRIP_FILLER_AFTER| if ((transforms & (PNG_TRANSFORM_STRIP_FILLER_AFTER|
PNG_TRANSFORM_STRIP_FILLER_BEFORE)) != 0) PNG_TRANSFORM_STRIP_FILLER_BEFORE)) != 0)
{ {
#ifdef PNG_WRITE_FILLER_SUPPORTED #ifdef PNG_WRITE_FILLER_SUPPORTED
if ((transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER) != 0) if ((transforms & PNG_TRANSFORM_STRIP_FILLER_AFTER) != 0)
{ {
if ((transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE) != 0) if ((transforms & PNG_TRANSFORM_STRIP_FILLER_BEFORE) != 0)
png_app_error(png_ptr, png_app_error(png_ptr,
"PNG_TRANSFORM_STRIP_FILLER: BEFORE+AFTER not supported"); "PNG_TRANSFORM_STRIP_FILLER: BEFORE+AFTER not supported");
/* Continue if ignored - this is the pre-1.6.10 behavior */ /* Continue if ignored - this is the pre-1.6.10 behavior */
png_set_filler(png_ptr, 0, PNG_FILLER_AFTER); png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
@ -1680,13 +1452,13 @@ png_write_png(png_structrp png_ptr, png_inforp info_ptr,
#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED #ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED
#ifdef PNG_STDIO_SUPPORTED /* currently required for png_image_write_* */ # ifdef PNG_STDIO_SUPPORTED /* currently required for png_image_write_* */
/* Initialize the write structure - general purpose utility. */ /* Initialize the write structure - general purpose utility. */
static int static int
png_image_write_init(png_imagep image) png_image_write_init(png_imagep image)
{ {
png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, image, png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, image,
png_safe_error, png_safe_warning); png_safe_error, png_safe_warning);
if (png_ptr != NULL) if (png_ptr != NULL)
{ {
@ -1695,7 +1467,7 @@ png_image_write_init(png_imagep image)
if (info_ptr != NULL) if (info_ptr != NULL)
{ {
png_controlp control = png_voidcast(png_controlp, png_controlp control = png_voidcast(png_controlp,
png_malloc_warn(png_ptr, (sizeof *control))); png_malloc_warn(png_ptr, (sizeof *control)));
if (control != NULL) if (control != NULL)
{ {
@ -1742,12 +1514,12 @@ static int
png_write_image_16bit(png_voidp argument) png_write_image_16bit(png_voidp argument)
{ {
png_image_write_control *display = png_voidcast(png_image_write_control*, png_image_write_control *display = png_voidcast(png_image_write_control*,
argument); argument);
png_imagep image = display->image; png_imagep image = display->image;
png_structrp png_ptr = image->opaque->png_ptr; png_structrp png_ptr = image->opaque->png_ptr;
png_const_uint_16p input_row = png_voidcast(png_const_uint_16p, png_const_uint_16p input_row = png_voidcast(png_const_uint_16p,
display->first_row); display->first_row);
png_uint_16p output_row = png_voidcast(png_uint_16p, display->local_row); png_uint_16p output_row = png_voidcast(png_uint_16p, display->local_row);
png_uint_16p row_end; png_uint_16p row_end;
const int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1; const int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1;
@ -1756,17 +1528,18 @@ png_write_image_16bit(png_voidp argument)
if ((image->format & PNG_FORMAT_FLAG_ALPHA) != 0) if ((image->format & PNG_FORMAT_FLAG_ALPHA) != 0)
{ {
# ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED # ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED
if ((image->format & PNG_FORMAT_FLAG_AFIRST) != 0) if ((image->format & PNG_FORMAT_FLAG_AFIRST) != 0)
{ {
aindex = -1; aindex = -1;
++input_row; /* To point to the first component */ ++input_row; /* To point to the first component */
++output_row; ++output_row;
} }
else else
# endif aindex = channels;
# else
aindex = channels; aindex = channels;
# endif
} }
else else
@ -1848,7 +1621,7 @@ png_write_image_16bit(png_voidp argument)
* calculation can be done to 15 bits of accuracy; however, the output needs to * calculation can be done to 15 bits of accuracy; however, the output needs to
* be scaled in the range 0..255*65535, so include that scaling here. * be scaled in the range 0..255*65535, so include that scaling here.
*/ */
#define UNP_RECIPROCAL(alpha) ((((0xffff*0xff)<<7)+(alpha>>1))/alpha) # define UNP_RECIPROCAL(alpha) ((((0xffff*0xff)<<7)+(alpha>>1))/alpha)
static png_byte static png_byte
png_unpremultiply(png_uint_32 component, png_uint_32 alpha, png_unpremultiply(png_uint_32 component, png_uint_32 alpha,
@ -1899,12 +1672,12 @@ static int
png_write_image_8bit(png_voidp argument) png_write_image_8bit(png_voidp argument)
{ {
png_image_write_control *display = png_voidcast(png_image_write_control*, png_image_write_control *display = png_voidcast(png_image_write_control*,
argument); argument);
png_imagep image = display->image; png_imagep image = display->image;
png_structrp png_ptr = image->opaque->png_ptr; png_structrp png_ptr = image->opaque->png_ptr;
png_const_uint_16p input_row = png_voidcast(png_const_uint_16p, png_const_uint_16p input_row = png_voidcast(png_const_uint_16p,
display->first_row); display->first_row);
png_bytep output_row = png_voidcast(png_bytep, display->local_row); png_bytep output_row = png_voidcast(png_bytep, display->local_row);
png_uint_32 y = image->height; png_uint_32 y = image->height;
const int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1; const int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ? 3 : 1;
@ -1914,17 +1687,17 @@ png_write_image_8bit(png_voidp argument)
png_bytep row_end; png_bytep row_end;
int aindex; int aindex;
# ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED # ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED
if ((image->format & PNG_FORMAT_FLAG_AFIRST) != 0) if ((image->format & PNG_FORMAT_FLAG_AFIRST) != 0)
{ {
aindex = -1; aindex = -1;
++input_row; /* To point to the first component */ ++input_row; /* To point to the first component */
++output_row; ++output_row;
} }
else else
# endif # endif
aindex = channels; aindex = channels;
/* Use row_end in place of a loop counter: */ /* Use row_end in place of a loop counter: */
row_end = output_row + image->width * (channels+1); row_end = output_row + image->width * (channels+1);
@ -1958,7 +1731,7 @@ png_write_image_8bit(png_voidp argument)
} /* while out_ptr < row_end */ } /* while out_ptr < row_end */
png_write_row(png_ptr, png_voidcast(png_const_bytep, png_write_row(png_ptr, png_voidcast(png_const_bytep,
display->local_row)); display->local_row));
input_row += display->row_bytes/(sizeof (png_uint_16)); input_row += display->row_bytes/(sizeof (png_uint_16));
} /* while y */ } /* while y */
} }
@ -1997,25 +1770,25 @@ png_image_set_PLTE(png_image_write_control *display)
const png_imagep image = display->image; const png_imagep image = display->image;
const void *cmap = display->colormap; const void *cmap = display->colormap;
const int entries = image->colormap_entries > 256 ? 256 : const int entries = image->colormap_entries > 256 ? 256 :
(int)image->colormap_entries; (int)image->colormap_entries;
/* NOTE: the caller must check for cmap != NULL and entries != 0 */ /* NOTE: the caller must check for cmap != NULL and entries != 0 */
const png_uint_32 format = image->format; const png_uint_32 format = image->format;
const int channels = PNG_IMAGE_SAMPLE_CHANNELS(format); const int channels = PNG_IMAGE_SAMPLE_CHANNELS(format);
# if defined(PNG_FORMAT_BGR_SUPPORTED) &&\ # if defined(PNG_FORMAT_BGR_SUPPORTED) &&\
defined(PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED) defined(PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED)
const int afirst = (format & PNG_FORMAT_FLAG_AFIRST) != 0 && const int afirst = (format & PNG_FORMAT_FLAG_AFIRST) != 0 &&
(format & PNG_FORMAT_FLAG_ALPHA) != 0; (format & PNG_FORMAT_FLAG_ALPHA) != 0;
# else # else
# define afirst 0 # define afirst 0
# endif # endif
# ifdef PNG_FORMAT_BGR_SUPPORTED # ifdef PNG_FORMAT_BGR_SUPPORTED
const int bgr = (format & PNG_FORMAT_FLAG_BGR) != 0 ? 2 : 0; const int bgr = (format & PNG_FORMAT_FLAG_BGR) != 0 ? 2 : 0;
# else # else
# define bgr 0 # define bgr 0
# endif # endif
int i, num_trans; int i, num_trans;
png_color palette[256]; png_color palette[256];
@ -2040,11 +1813,11 @@ png_image_set_PLTE(png_image_write_control *display)
if (channels >= 3) /* RGB */ if (channels >= 3) /* RGB */
{ {
palette[i].blue = (png_byte)PNG_sRGB_FROM_LINEAR(255 * palette[i].blue = (png_byte)PNG_sRGB_FROM_LINEAR(255 *
entry[(2 ^ bgr)]); entry[(2 ^ bgr)]);
palette[i].green = (png_byte)PNG_sRGB_FROM_LINEAR(255 * palette[i].green = (png_byte)PNG_sRGB_FROM_LINEAR(255 *
entry[1]); entry[1]);
palette[i].red = (png_byte)PNG_sRGB_FROM_LINEAR(255 * palette[i].red = (png_byte)PNG_sRGB_FROM_LINEAR(255 *
entry[bgr]); entry[bgr]);
} }
else /* Gray */ else /* Gray */
@ -2120,12 +1893,12 @@ png_image_set_PLTE(png_image_write_control *display)
} }
} }
# ifdef afirst # ifdef afirst
# undef afirst # undef afirst
# endif # endif
# ifdef bgr # ifdef bgr
# undef bgr # undef bgr
# endif # endif
png_set_PLTE(image->opaque->png_ptr, image->opaque->info_ptr, palette, png_set_PLTE(image->opaque->png_ptr, image->opaque->info_ptr, palette,
entries); entries);
@ -2153,10 +1926,10 @@ png_image_write_main(png_voidp argument)
int alpha = !colormap && (format & PNG_FORMAT_FLAG_ALPHA); int alpha = !colormap && (format & PNG_FORMAT_FLAG_ALPHA);
int write_16bit = linear && !colormap && (display->convert_to_8bit == 0); int write_16bit = linear && !colormap && (display->convert_to_8bit == 0);
# ifdef PNG_BENIGN_ERRORS_SUPPORTED # ifdef PNG_BENIGN_ERRORS_SUPPORTED
/* Make sure we error out on any bad situation */ /* Make sure we error out on any bad situation */
png_set_benign_errors(png_ptr, 0/*error*/); png_set_benign_errors(png_ptr, 0/*error*/);
# endif # endif
/* Default the 'row_stride' parameter if required. */ /* Default the 'row_stride' parameter if required. */
if (display->row_stride == 0) if (display->row_stride == 0)
@ -2235,23 +2008,23 @@ png_image_write_main(png_voidp argument)
png_set_swap(png_ptr); png_set_swap(png_ptr);
} }
# ifdef PNG_SIMPLIFIED_WRITE_BGR_SUPPORTED # ifdef PNG_SIMPLIFIED_WRITE_BGR_SUPPORTED
if ((format & PNG_FORMAT_FLAG_BGR) != 0) if ((format & PNG_FORMAT_FLAG_BGR) != 0)
{ {
if (colormap == 0 && (format & PNG_FORMAT_FLAG_COLOR) != 0) if (colormap == 0 && (format & PNG_FORMAT_FLAG_COLOR) != 0)
png_set_bgr(png_ptr); png_set_bgr(png_ptr);
format &= ~PNG_FORMAT_FLAG_BGR; format &= ~PNG_FORMAT_FLAG_BGR;
} }
# endif # endif
# ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED # ifdef PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED
if ((format & PNG_FORMAT_FLAG_AFIRST) != 0) if ((format & PNG_FORMAT_FLAG_AFIRST) != 0)
{ {
if (colormap == 0 && (format & PNG_FORMAT_FLAG_ALPHA) != 0) if (colormap == 0 && (format & PNG_FORMAT_FLAG_ALPHA) != 0)
png_set_swap_alpha(png_ptr); png_set_swap_alpha(png_ptr);
format &= ~PNG_FORMAT_FLAG_AFIRST; format &= ~PNG_FORMAT_FLAG_AFIRST;
} }
# endif # endif
/* If there are 16 or fewer color-map entries we wrote a lower bit depth /* If there are 16 or fewer color-map entries we wrote a lower bit depth
* above, but the application data is still byte packed. * above, but the application data is still byte packed.
@ -2287,7 +2060,9 @@ png_image_write_main(png_voidp argument)
* it about 50 times. The speed-up in pngstest was about 10-20% of the * it about 50 times. The speed-up in pngstest was about 10-20% of the
* total (user) time on a heavily loaded system. * total (user) time on a heavily loaded system.
*/ */
# ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
png_set_compression_level(png_ptr, 3); png_set_compression_level(png_ptr, 3);
# endif
} }
/* Check for the cases that currently require a pre-transform on the row /* Check for the cases that currently require a pre-transform on the row
@ -2450,6 +2225,6 @@ png_image_write_to_file(png_imagep image, const char *file_name,
else else
return 0; return 0;
} }
#endif /* STDIO */ # endif /* STDIO */
#endif /* SIMPLIFIED_WRITE */ #endif /* SIMPLIFIED_WRITE */
#endif /* WRITE */ #endif /* WRITE */

16
GRRLIB/lib/png/pngwtran.c
View file

@ -1,8 +1,8 @@
/* pngwtran.c - transforms the data in a row for PNG writers /* pngwtran.c - transforms the data in a row for PNG writers
* *
* Last changed in libpng 1.6.15 [November 20, 2014] * Last changed in libpng 1.6.18 [July 23, 2015]
* Copyright (c) 1998-2014 Glenn Randers-Pehrson * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
* *
@ -71,7 +71,8 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
case 2: case 2:
{ {
png_bytep sp, dp; png_bytep sp, dp;
int shift, v; unsigned int shift;
int v;
png_uint_32 i; png_uint_32 i;
png_uint_32 row_width = row_info->width; png_uint_32 row_width = row_info->width;
@ -110,7 +111,8 @@ png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
case 4: case 4:
{ {
png_bytep sp, dp; png_bytep sp, dp;
int shift, v; unsigned int shift;
int v;
png_uint_32 i; png_uint_32 i;
png_uint_32 row_width = row_info->width; png_uint_32 row_width = row_info->width;
@ -422,7 +424,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
*(dp++) = *(sp++); *(dp++) = *(sp++);
*/ */
sp+=3; dp = sp; sp+=3; dp = sp;
*(dp++) = (png_byte)(255 - *(sp++)); *dp = (png_byte)(255 - *(sp++));
} }
} }
@ -446,7 +448,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
*/ */
sp+=6; dp = sp; sp+=6; dp = sp;
*(dp++) = (png_byte)(255 - *(sp++)); *(dp++) = (png_byte)(255 - *(sp++));
*(dp++) = (png_byte)(255 - *(sp++)); *dp = (png_byte)(255 - *(sp++));
} }
} }
#endif /* WRITE_16BIT */ #endif /* WRITE_16BIT */
@ -484,7 +486,7 @@ png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
*/ */
sp+=2; dp = sp; sp+=2; dp = sp;
*(dp++) = (png_byte)(255 - *(sp++)); *(dp++) = (png_byte)(255 - *(sp++));
*(dp++) = (png_byte)(255 - *(sp++)); *dp = (png_byte)(255 - *(sp++));
} }
} }
#endif /* WRITE_16BIT */ #endif /* WRITE_16BIT */

890
GRRLIB/lib/png/pngwutil.c
View file

File diff suppressed because it is too large Load diff