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update libpng 1.5.27

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This commit is contained in:
Alexander Alekhin 2016-06-29 12:35:38 +03:00
parent 8bb8f8dcae
commit 882e120a9d
27 changed files with 1836 additions and 2094 deletions
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2
3rdparty/libpng/CMakeLists.txt vendored
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@ -15,7 +15,7 @@ file(GLOB lib_srcs *.c)
file(GLOB lib_hdrs *.h) file(GLOB lib_hdrs *.h)
if(ARM AND NEON) if(ARM AND NEON)
list(APPEND lib_srcs arm/filter_neon.S) list(APPEND lib_srcs arm/filter_neon.S arm/arm_init.c)
add_definitions(-DPNG_ARM_NEON) add_definitions(-DPNG_ARM_NEON)
endif() endif()

69
3rdparty/libpng/LICENSE vendored
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@ -10,20 +10,16 @@ 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 1.5.12, July 11, 2012, are libpng versions 1.0.7, July 1, 2000, through 1.5.27, May 26, 2016, are
Copyright (c) 2004, 2006-2012 Glenn Randers-Pehrson, and are Copyright (c) 2000-2002, 2004, 2006-2016 Glenn Randers-Pehrson, are
distributed according to the same disclaimer and license as libpng-1.2.5 derived from libpng-1.0.6, and are distributed according to the same
with the following individual added to the list of Contributing Authors disclaimer and license as libpng-1.0.6 with the following individuals
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
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
and with the following additions to the disclaimer: and with the following additions to the disclaimer:
@ -36,18 +32,20 @@ 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, are derived from
distributed according to the same disclaimer and license as libpng-0.96, libpng-0.96, and are distributed according to the same disclaimer and
with the following individuals added to the list of Contributing Authors: license as libpng-0.96, with the following 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, are derived from libpng-0.88,
Distributed according to the same disclaimer and license as libpng-0.88, and are distributed according to the same disclaimer and license as
with the following individuals added to the list of Contributing Authors: libpng-0.88, with the following individuals added to the list of
Contributing Authors:
John Bowler John Bowler
Kevin Bracey Kevin Bracey
@ -57,7 +55,7 @@ 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:
@ -80,12 +78,12 @@ 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
@ -94,18 +92,31 @@ 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.
END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE.
A "png_get_copyright" function is available, for convenient use in "about" TRADEMARK:
boxes and the like:
printf("%s",png_get_copyright(NULL)); The name "libpng" has not been registered by the Copyright owner
as a trademark in any jurisdiction. However, because libpng has
been distributed and maintained world-wide, continually since 1995,
the Copyright owner claims "common-law trademark protection" in any
jurisdiction where common-law trademark is recognized.
Also, the PNG logo (in PNG format, of course) is supplied in the OSI CERTIFICATION:
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.
EXPORT CONTROL:
The Copyright owner believes that the Export Control Classification
Number (ECCN) for libpng is EAR99, which means not subject to export
controls or International Traffic in Arms Regulations (ITAR) because
it is open source, publicly available software, that does not contain
any encryption software. See the EAR, paragraphs 734.3(b)(3) and
734.7(b).
Glenn Randers-Pehrson Glenn Randers-Pehrson
glennrp at users.sourceforge.net glennrp at users.sourceforge.net
July 11, 2012 May 26, 2016

53
3rdparty/libpng/README vendored
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@ -1,11 +1,11 @@
README for libpng version 1.5.12 - July 11, 2012 (shared library 15.0) README for libpng version 1.5.27 - May 26, 2016 (shared library 15.0)
See the note about version numbers near the top of png.h See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng. See INSTALL for instructions on how to install libpng.
Libpng comes in several distribution formats. Get libpng-*.tar.gz, Libpng comes in several distribution formats. Get libpng-*.tar.gz or
libpng-*.tar.xz or libpng-*.tar.bz2 if you want UNIX-style line endings libpng-*.tar.xz or if you want UNIX-style line endings in the text files,
in the text files, or lpng*.zip if you want DOS-style line endings. or lpng*.7z or lpng*.zip if you want DOS-style line endings.
Version 0.89 was the first official release of libpng. Don't let the Version 0.89 was the first official release of libpng. Don't let the
fact that it's the first release fool you. The libpng library has been in fact that it's the first release fool you. The libpng library has been in
@ -23,18 +23,25 @@ earlier versions if you are using a shared library. The type of the
png_uint_32, which will affect shared-library applications that use png_uint_32, which will affect shared-library applications that use
this function. this function.
To avoid problems with changes to the internals of png_info_struct, To avoid problems with changes to the internals of the png info_struct,
new APIs have been made available in 0.95 to avoid direct application new APIs have been made available in 0.95 to avoid direct application
access to info_ptr. These functions are the png_set_<chunk> and access to info_ptr. These functions are the png_set_<chunk> and
png_get_<chunk> functions. These functions should be used when png_get_<chunk> functions. These functions should be used when
accessing/storing the info_struct data, rather than manipulating it accessing/storing the info_struct data, rather than manipulating it
directly, to avoid such problems in the future. directly, to avoid such problems in the future.
It is important to note that the APIs do not make current programs It is important to note that the APIs did not make current programs
that access the info struct directly incompatible with the new that access the info struct directly incompatible with the new
library. However, it is strongly suggested that new programs use library, through libpng-1.2.x. In libpng-1.4.x, which was meant to
the new APIs (as shown in example.c and pngtest.c), and older programs be a transitional release, members of the png_struct and the
be converted to the new format, to facilitate upgrades in the future. info_struct can still be accessed, but the compiler will issue a
warning about deprecated usage. Since libpng-1.5.0, direct access
to these structs is not allowed, and the definitions of the structs
reside in private pngstruct.h and pnginfo.h header files that are not
accessible to applications. It is strongly suggested that new
programs use the new APIs (as shown in example.c and pngtest.c), and
older programs be converted to the new format, to facilitate upgrades
in the future.
**** ****
Additions since 0.90 include the ability to compile libpng as a Additions since 0.90 include the ability to compile libpng as a
@ -77,17 +84,21 @@ compression library that is useful for more things than just PNG files.
You can use zlib as a drop-in replacement for fread() and fwrite() if You can use zlib as a drop-in replacement for fread() and fwrite() if
you are so inclined. you are so inclined.
zlib should be available at the same place that libpng is, or at. zlib should be available at the same place that libpng is, or at zlib.net.
ftp://ftp.info-zip.org/pub/infozip/zlib
You may also want a copy of the PNG specification. It is available You may also want a copy of the PNG specification. It is available
as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find
these at http://www.libpng.org/pub/png/documents/ these at http://www.libpng.org/pub/png/documents/
This code is currently being archived at libpng.sf.net in the This code is currently being archived at libpng.sf.net in the
[DOWNLOAD] area, and on CompuServe, Lib 20 (PNG SUPPORT) [DOWNLOAD] area, and at ftp://ftp.simplesystems.org. If you can't find it
at GO GRAPHSUP. If you can't find it in any of those places, in any of those places, e-mail me, and I'll help you find it.
e-mail me, and I'll help you find it.
I am not a lawyer, but I believe that the Export Control Classification
Number (ECCN) for libpng is EAR99, which means not subject to export
controls or International Traffic in Arms Regulations (ITAR) because it
is open source, publicly available software, that does not contain any
encryption software. See the EAR, paragraphs 734.3(b)(3) and 734.7(b).
If you have any code changes, requests, problems, etc., please e-mail If you have any code changes, requests, problems, etc., please e-mail
them to me. Also, I'd appreciate any make files or project files, them to me. Also, I'd appreciate any make files or project files,
@ -123,7 +134,7 @@ and ...". If in doubt, send questions to me. I'll bounce them
to others, if necessary. to others, if necessary.
Please do not send suggestions on how to change PNG. We have Please do not send suggestions on how to change PNG. We have
been discussing PNG for sixteen years now, and it is official and been discussing PNG for twenty years now, and it is official and
finished. If you have suggestions for libpng, however, I'll finished. If you have suggestions for libpng, however, I'll
gladly listen. Even if your suggestion is not used immediately, gladly listen. Even if your suggestion is not used immediately,
it may be used later. it may be used later.
@ -167,23 +178,23 @@ Files in this distribution:
pngwrite.c => High-level write functions pngwrite.c => High-level write functions
pngwtran.c => Write data transformations pngwtran.c => Write data transformations
pngwutil.c => Write utility functions pngwutil.c => Write utility functions
arm => Contains optimized code for the ARM platform
contrib => Contributions contrib => Contributions
gregbook => source code for PNG reading and writing, from gregbook => source code for PNG reading and writing, from
Greg Roelofs' "PNG: The Definitive Guide", Greg Roelofs' "PNG: The Definitive Guide",
O'Reilly, 1999 O'Reilly, 1999
msvctest => Builds and runs pngtest using a MSVC workspace libtests => Test programs
pngminim => Minimal decoder, encoder, and progressive decoder
programs demonstrating use of pngusr.dfa
pngminus => Simple pnm2png and png2pnm programs pngminus => Simple pnm2png and png2pnm programs
pngsuite => Test images pngsuite => Test images
visupng => Contains a MSVC workspace for VisualPng visupng => Contains a MSVC workspace for VisualPng
projects => Contains project files and workspaces for projects => Contains project files and workspaces for
building a DLL building a DLL
cbuilder5 => Contains a Borland workspace for building owatcom => Contains a WATCOM project for building libpng
libpng and zlib
visualc6 => Contains a Microsoft Visual C++ (MSVC)
workspace for building libpng and zlib
visualc71 => Contains a Microsoft Visual C++ (MSVC) visualc71 => Contains a Microsoft Visual C++ (MSVC)
workspace for building libpng and zlib workspace for building libpng and zlib
xcode => Contains an Apple xcode vstudio => Contains a Microsoft Visual C++ (MSVC)
workspace for building libpng and zlib workspace for building libpng and zlib
scripts => Directory containing scripts for building libpng: scripts => Directory containing scripts for building libpng:
(see scripts/README.txt for the list of scripts) (see scripts/README.txt for the list of scripts)

232
3rdparty/libpng/arm/arm_init.c vendored Normal file
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@ -0,0 +1,232 @@
/* arm_init.c - NEON optimised filter functions
*
* Copyright (c) 2013 Glenn Randers-Pehrson
* Written by Mans Rullgard, 2011.
* Last changed in libpng 1.6.8 [December 19, 2013]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*/
/* Below, after checking __linux__, various non-C90 POSIX 1003.1 functions are
* called.
*/
#define _POSIX_SOURCE 1
#include "../pngpriv.h"
#ifdef PNG_READ_SUPPORTED
#if PNG_ARM_NEON_OPT > 0
#ifdef PNG_ARM_NEON_CHECK_SUPPORTED /* Do run-time checks */
#include <signal.h> /* for sig_atomic_t */
#ifdef __ANDROID__
/* Linux provides access to information about CPU capabilites via
* /proc/self/auxv, however Android blocks this while still claiming to be
* Linux. The Andoid NDK, however, provides appropriate support.
*
* Documentation: http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html
*/
#include <cpu-features.h>
static int
png_have_neon(png_structp png_ptr)
{
/* This is a whole lot easier than the mess below, however it is probably
* implemented as below, therefore it is better to cache the result (these
* function calls may be slow!)
*/
PNG_UNUSED(png_ptr)
return android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM &&
(android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0;
}
#elif defined(__linux__)
/* The generic __linux__ implementation requires reading /proc/self/auxv and
* looking at each element for one that records NEON capabilities.
*/
#include <unistd.h> /* for POSIX 1003.1 */
#include <errno.h> /* for EINTR */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <elf.h>
#include <asm/hwcap.h>
/* A read call may be interrupted, in which case it returns -1 and sets errno to
* EINTR if nothing was done, otherwise (if something was done) a partial read
* may result.
*/
static size_t
safe_read(png_structp png_ptr, int fd, void *buffer_in, size_t nbytes)
{
size_t ntotal = 0;
char *buffer = png_voidcast(char*, buffer_in);
while (nbytes > 0)
{
unsigned int nread;
int iread;
/* Passing nread > INT_MAX to read is implementation defined in POSIX
* 1003.1, therefore despite the unsigned argument portable code must
* limit the value to INT_MAX!
*/
if (nbytes > INT_MAX)
nread = INT_MAX;
else
nread = (unsigned int)/*SAFE*/nbytes;
iread = read(fd, buffer, nread);
if (iread == -1)
{
/* This is the devil in the details, a read can terminate early with 0
* bytes read because of EINTR, yet it still returns -1 otherwise end
* of file cannot be distinguished.
*/
if (errno != EINTR)
{
png_warning(png_ptr, "/proc read failed");
return 0; /* I.e., a permanent failure */
}
}
else if (iread < 0)
{
/* Not a valid 'read' result: */
png_warning(png_ptr, "OS /proc read bug");
return 0;
}
else if (iread > 0)
{
/* Continue reading until a permanent failure, or EOF */
buffer += iread;
nbytes -= (unsigned int)/*SAFE*/iread;
ntotal += (unsigned int)/*SAFE*/iread;
}
else
return ntotal;
}
return ntotal; /* nbytes == 0 */
}
static int
png_have_neon(png_structp png_ptr)
{
int fd = open("/proc/self/auxv", O_RDONLY);
Elf32_auxv_t aux;
/* Failsafe: failure to open means no NEON */
if (fd == -1)
{
png_warning(png_ptr, "/proc/self/auxv open failed");
return 0;
}
while (safe_read(png_ptr, fd, &aux, sizeof aux) == sizeof aux)
{
if (aux.a_type == AT_HWCAP && (aux.a_un.a_val & HWCAP_NEON) != 0)
{
close(fd);
return 1;
}
}
close(fd);
return 0;
}
#else
/* We don't know how to do a run-time check on this system */
# error "no support for run-time ARM NEON checks"
#endif /* OS checks */
#endif /* PNG_ARM_NEON_CHECK_SUPPORTED */
#ifndef PNG_ALIGNED_MEMORY_SUPPORTED
# error "ALIGNED_MEMORY is required; set: -DPNG_ALIGNED_MEMORY_SUPPORTED"
#endif
void
png_init_filter_functions_neon(png_structp pp, unsigned int bpp)
{
/* The switch statement is compiled in for ARM_NEON_API, the call to
* png_have_neon is compiled in for ARM_NEON_CHECK. If both are defined
* the check is only performed if the API has not set the NEON option on
* or off explicitly. In this case the check controls what happens.
*
* If the CHECK is not compiled in and the option is UNSET the behavior prior
* to 1.6.7 was to use the NEON code - this was a bug caused by having the
* wrong order of the 'ON' and 'default' cases. UNSET now defaults to OFF,
* as documented in png.h
*/
#ifdef PNG_ARM_NEON_API_SUPPORTED
switch ((pp->options >> PNG_ARM_NEON) & 3)
{
case PNG_OPTION_UNSET:
/* Allow the run-time check to execute if it has been enabled -
* thus both API and CHECK can be turned on. If it isn't supported
* this case will fall through to the 'default' below, which just
* returns.
*/
#endif /* PNG_ARM_NEON_API_SUPPORTED */
#ifdef PNG_ARM_NEON_CHECK_SUPPORTED
{
static volatile sig_atomic_t no_neon = -1; /* not checked */
if (no_neon < 0)
no_neon = !png_have_neon(pp);
if (no_neon)
return;
}
#ifdef PNG_ARM_NEON_API_SUPPORTED
break;
#endif
#endif /* PNG_ARM_NEON_CHECK_SUPPORTED */
#ifdef PNG_ARM_NEON_API_SUPPORTED
default: /* OFF or INVALID */
return;
case PNG_OPTION_ON:
/* Option turned on */
break;
}
#endif
/* IMPORTANT: any new external functions used here must be declared using
* PNG_INTERNAL_FUNCTION in ../pngpriv.h. This is required so that the
* 'prefix' option to configure works:
*
* ./configure --with-libpng-prefix=foobar_
*
* Verify you have got this right by running the above command, doing a build
* and examining pngprefix.h; it must contain a #define for every external
* function you add. (Notice that this happens automatically for the
* initialization function.)
*/
pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon;
if (bpp == 3)
{
pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_neon;
pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_neon;
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
png_read_filter_row_paeth3_neon;
}
else if (bpp == 4)
{
pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_neon;
pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_neon;
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
png_read_filter_row_paeth4_neon;
}
}
#endif /* PNG_ARM_NEON_OPT > 0 */
#endif /* PNG_READ_SUPPORTED */

298
3rdparty/libpng/png.c vendored
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@ -1,8 +1,8 @@
/* png.c - location for general purpose libpng functions /* png.c - location for general purpose libpng functions
* *
* Last changed in libpng 1.5.11 [June 14, 2012] * Last changed in libpng 1.5.23 [July 23, 2015]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2015 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_5_12 Your_png_h_is_not_version_1_5_12; typedef png_libpng_version_1_5_27 Your_png_h_is_not_version_1_5_27;
/* 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
@ -26,15 +26,20 @@ typedef png_libpng_version_1_5_12 Your_png_h_is_not_version_1_5_12;
void PNGAPI void PNGAPI
png_set_sig_bytes(png_structp png_ptr, int num_bytes) png_set_sig_bytes(png_structp png_ptr, int num_bytes)
{ {
unsigned int nb = (unsigned int)num_bytes;
png_debug(1, "in png_set_sig_bytes"); png_debug(1, "in png_set_sig_bytes");
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
if (num_bytes > 8) if (num_bytes < 0)
nb = 0;
if (nb > 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)nb;
} }
/* Checks whether the supplied bytes match the PNG signature. We allow /* Checks whether the supplied bytes match the PNG signature. We allow
@ -73,13 +78,16 @@ PNG_FUNCTION(voidpf /* PRIVATE */,
png_zalloc,(voidpf png_ptr, uInt items, uInt size),PNG_ALLOCATED) png_zalloc,(voidpf png_ptr, uInt items, uInt size),PNG_ALLOCATED)
{ {
png_voidp ptr; png_voidp ptr;
png_structp p=(png_structp)png_ptr; png_structp p;
png_uint_32 save_flags=p->flags; png_uint_32 save_flags;
png_alloc_size_t num_bytes; png_alloc_size_t num_bytes;
if (png_ptr == NULL) if (png_ptr == NULL)
return (NULL); return (NULL);
p=(png_structp)png_ptr;
save_flags=p->flags;
if (items > PNG_UINT_32_MAX/size) if (items > PNG_UINT_32_MAX/size)
{ {
png_warning (p, "Potential overflow in png_zalloc()"); png_warning (p, "Potential overflow in png_zalloc()");
@ -146,9 +154,10 @@ png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length)
do do
{ {
uInt safeLength = (uInt)length; uInt safeLength = (uInt)length;
#ifndef __COVERITY__
if (safeLength == 0) if (safeLength == 0)
safeLength = (uInt)-1; /* evil, but safe */ safeLength = (uInt)-1; /* evil, but safe */
#endif
crc = crc32(crc, ptr, safeLength); crc = crc32(crc, ptr, safeLength);
/* The following should never issue compiler warnings, if they do the /* The following should never issue compiler warnings, if they do the
@ -171,39 +180,42 @@ png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length)
int int
png_user_version_check(png_structp png_ptr, png_const_charp user_png_ver) png_user_version_check(png_structp png_ptr, png_const_charp user_png_ver)
{ {
if (user_png_ver) /* Libpng versions 1.0.0 and later are binary compatible if the version
* string matches through the second '.'; we must recompile any
* applications that use any older library version.
*/
if (user_png_ver != NULL)
{ {
int i = 0; int i = -1;
int found_dots = 0;
do do
{ {
if (user_png_ver[i] != png_libpng_ver[i]) i++;
if (user_png_ver[i] != PNG_LIBPNG_VER_STRING[i])
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
} while (png_libpng_ver[i++]); if (user_png_ver[i] == '.')
found_dots++;
} while (found_dots < 2 && user_png_ver[i] != 0 &&
PNG_LIBPNG_VER_STRING[i] != 0);
} }
else else
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) if ((png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) != 0)
{
/* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
* we must recompile any applications that use any older library version.
* For versions after libpng 1.0, we will be compatible, so we need
* only check the first digit.
*/
if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
(user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
(user_png_ver[0] == '0' && user_png_ver[2] < '9'))
{ {
#ifdef PNG_WARNINGS_SUPPORTED #ifdef PNG_WARNINGS_SUPPORTED
size_t pos = 0; size_t pos = 0;
char m[128]; char m[128];
pos = png_safecat(m, sizeof m, pos, "Application built with libpng-"); pos = png_safecat(m, (sizeof m), pos,
pos = png_safecat(m, sizeof m, pos, user_png_ver); "Application built with libpng-");
pos = png_safecat(m, sizeof m, pos, " but running with "); pos = png_safecat(m, (sizeof m), pos, user_png_ver);
pos = png_safecat(m, sizeof m, pos, png_libpng_ver); pos = png_safecat(m, (sizeof m), pos, " but running with ");
pos = png_safecat(m, (sizeof m), pos, PNG_LIBPNG_VER_STRING);
PNG_UNUSED(pos)
png_warning(png_ptr, m); png_warning(png_ptr, m);
#endif #endif
@ -214,7 +226,6 @@ png_user_version_check(png_structp png_ptr, png_const_charp user_png_ver)
return 0; return 0;
} }
}
/* Success return. */ /* Success return. */
return 1; return 1;
@ -300,6 +311,8 @@ png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
png_destroy_struct(info_ptr); png_destroy_struct(info_ptr);
info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
*ptr_ptr = info_ptr; *ptr_ptr = info_ptr;
if (info_ptr == NULL)
return;
} }
/* Set everything to 0 */ /* Set everything to 0 */
@ -337,42 +350,43 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#ifdef PNG_TEXT_SUPPORTED #ifdef PNG_TEXT_SUPPORTED
/* Free text item num or (if num == -1) all text items */ /* Free text item num or (if num == -1) all text items */
if ((mask & PNG_FREE_TEXT) & info_ptr->free_me) if (info_ptr->text != 0 &&
((mask & PNG_FREE_TEXT) & info_ptr->free_me) != 0)
{ {
if (num != -1) if (num != -1)
{
if (info_ptr->text && info_ptr->text[num].key)
{ {
png_free(png_ptr, info_ptr->text[num].key); png_free(png_ptr, info_ptr->text[num].key);
info_ptr->text[num].key = NULL; info_ptr->text[num].key = NULL;
} }
}
else else
{ {
int i; int i;
for (i = 0; i < info_ptr->num_text; i++) for (i = 0; i < info_ptr->num_text; i++)
png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i); png_free(png_ptr, info_ptr->text[i].key);
png_free(png_ptr, info_ptr->text); png_free(png_ptr, info_ptr->text);
info_ptr->text = NULL; info_ptr->text = NULL;
info_ptr->num_text=0; info_ptr->num_text = 0;
} }
} }
#endif #endif
#ifdef PNG_tRNS_SUPPORTED #ifdef PNG_tRNS_SUPPORTED
/* Free any tRNS entry */ /* Free any tRNS entry */
if ((mask & PNG_FREE_TRNS) & info_ptr->free_me) 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
#ifdef PNG_sCAL_SUPPORTED #ifdef PNG_sCAL_SUPPORTED
/* Free any sCAL entry */ /* Free any sCAL entry */
if ((mask & PNG_FREE_SCAL) & info_ptr->free_me) if (((mask & PNG_FREE_SCAL) & info_ptr->free_me) != 0)
{ {
png_free(png_ptr, info_ptr->scal_s_width); png_free(png_ptr, info_ptr->scal_s_width);
png_free(png_ptr, info_ptr->scal_s_height); png_free(png_ptr, info_ptr->scal_s_height);
@ -384,20 +398,20 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#ifdef PNG_pCAL_SUPPORTED #ifdef PNG_pCAL_SUPPORTED
/* Free any pCAL entry */ /* Free any pCAL entry */
if ((mask & PNG_FREE_PCAL) & info_ptr->free_me) if (((mask & PNG_FREE_PCAL) & info_ptr->free_me) != 0)
{ {
png_free(png_ptr, info_ptr->pcal_purpose); png_free(png_ptr, info_ptr->pcal_purpose);
png_free(png_ptr, info_ptr->pcal_units); png_free(png_ptr, info_ptr->pcal_units);
info_ptr->pcal_purpose = NULL; info_ptr->pcal_purpose = NULL;
info_ptr->pcal_units = NULL; info_ptr->pcal_units = NULL;
if (info_ptr->pcal_params != NULL) if (info_ptr->pcal_params != NULL)
{ {
int i; int i;
for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
{ for (i = 0; i < info_ptr->pcal_nparams; i++)
png_free(png_ptr, info_ptr->pcal_params[i]); png_free(png_ptr, info_ptr->pcal_params[i]);
info_ptr->pcal_params[i] = NULL;
}
png_free(png_ptr, info_ptr->pcal_params); png_free(png_ptr, info_ptr->pcal_params);
info_ptr->pcal_params = NULL; info_ptr->pcal_params = NULL;
} }
@ -406,8 +420,8 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#endif #endif
#ifdef PNG_iCCP_SUPPORTED #ifdef PNG_iCCP_SUPPORTED
/* Free any iCCP entry */ /* Free any profile entry */
if ((mask & PNG_FREE_ICCP) & info_ptr->free_me) if (((mask & PNG_FREE_ICCP) & info_ptr->free_me) != 0)
{ {
png_free(png_ptr, info_ptr->iccp_name); png_free(png_ptr, info_ptr->iccp_name);
png_free(png_ptr, info_ptr->iccp_profile); png_free(png_ptr, info_ptr->iccp_profile);
@ -419,74 +433,62 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#ifdef PNG_sPLT_SUPPORTED #ifdef PNG_sPLT_SUPPORTED
/* Free a given sPLT entry, or (if num == -1) all sPLT entries */ /* Free a given sPLT entry, or (if num == -1) all sPLT entries */
if ((mask & PNG_FREE_SPLT) & info_ptr->free_me) if (info_ptr->splt_palettes != 0 &&
((mask & PNG_FREE_SPLT) & info_ptr->free_me) != 0)
{ {
if (num != -1) if (num != -1)
{
if (info_ptr->splt_palettes)
{ {
png_free(png_ptr, info_ptr->splt_palettes[num].name); png_free(png_ptr, info_ptr->splt_palettes[num].name);
png_free(png_ptr, info_ptr->splt_palettes[num].entries); png_free(png_ptr, info_ptr->splt_palettes[num].entries);
info_ptr->splt_palettes[num].name = NULL; info_ptr->splt_palettes[num].name = NULL;
info_ptr->splt_palettes[num].entries = NULL; info_ptr->splt_palettes[num].entries = NULL;
} }
}
else else
{
if (info_ptr->splt_palettes_num)
{ {
int i; int i;
for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i); 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); png_free(png_ptr, info_ptr->splt_palettes);
info_ptr->splt_palettes = NULL; info_ptr->splt_palettes = NULL;
info_ptr->splt_palettes_num = 0; info_ptr->splt_palettes_num = 0;
}
info_ptr->valid &= ~PNG_INFO_sPLT; info_ptr->valid &= ~PNG_INFO_sPLT;
} }
} }
#endif #endif
#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
if (png_ptr->unknown_chunk.data) if (info_ptr->unknown_chunks != 0 &&
{ ((mask & PNG_FREE_UNKN) & info_ptr->free_me) != 0)
png_free(png_ptr, png_ptr->unknown_chunk.data);
png_ptr->unknown_chunk.data = NULL;
}
if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
{ {
if (num != -1) if (num != -1)
{
if (info_ptr->unknown_chunks)
{ {
png_free(png_ptr, info_ptr->unknown_chunks[num].data); png_free(png_ptr, info_ptr->unknown_chunks[num].data);
info_ptr->unknown_chunks[num].data = NULL; info_ptr->unknown_chunks[num].data = NULL;
} }
}
else else
{ {
int i; int i;
if (info_ptr->unknown_chunks_num)
{
for (i = 0; i < info_ptr->unknown_chunks_num; i++) for (i = 0; i < info_ptr->unknown_chunks_num; i++)
png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, 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
#ifdef PNG_hIST_SUPPORTED #ifdef PNG_hIST_SUPPORTED
/* Free any hIST entry */ /* Free any hIST entry */
if ((mask & PNG_FREE_HIST) & info_ptr->free_me) if (((mask & PNG_FREE_HIST) & info_ptr->free_me) != 0)
{ {
png_free(png_ptr, info_ptr->hist); png_free(png_ptr, info_ptr->hist);
info_ptr->hist = NULL; info_ptr->hist = NULL;
@ -495,9 +497,9 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#endif #endif
/* Free any PLTE entry that was internally allocated */ /* Free any PLTE entry that was internally allocated */
if ((mask & PNG_FREE_PLTE) & info_ptr->free_me) if (((mask & PNG_FREE_PLTE) & info_ptr->free_me) != 0)
{ {
png_zfree(png_ptr, info_ptr->palette); png_free(png_ptr, info_ptr->palette);
info_ptr->palette = NULL; info_ptr->palette = NULL;
info_ptr->valid &= ~PNG_INFO_PLTE; info_ptr->valid &= ~PNG_INFO_PLTE;
info_ptr->num_palette = 0; info_ptr->num_palette = 0;
@ -505,16 +507,14 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#ifdef PNG_INFO_IMAGE_SUPPORTED #ifdef PNG_INFO_IMAGE_SUPPORTED
/* Free any image bits attached to the info structure */ /* Free any image bits attached to the info structure */
if ((mask & PNG_FREE_ROWS) & info_ptr->free_me) if (((mask & PNG_FREE_ROWS) & info_ptr->free_me) != 0)
{ {
if (info_ptr->row_pointers) if (info_ptr->row_pointers != 0)
{
int row;
for (row = 0; row < (int)info_ptr->height; row++)
{ {
png_uint_32 row;
for (row = 0; row < info_ptr->height; row++)
png_free(png_ptr, info_ptr->row_pointers[row]); png_free(png_ptr, info_ptr->row_pointers[row]);
info_ptr->row_pointers[row] = NULL;
}
png_free(png_ptr, info_ptr->row_pointers); png_free(png_ptr, info_ptr->row_pointers);
info_ptr->row_pointers = NULL; info_ptr->row_pointers = NULL;
} }
@ -655,14 +655,15 @@ png_get_copyright(png_const_structp png_ptr)
#else #else
# ifdef __STDC__ # ifdef __STDC__
return PNG_STRING_NEWLINE \ return PNG_STRING_NEWLINE \
"libpng version 1.5.12 - July 11, 2012" PNG_STRING_NEWLINE \ "libpng version 1.5.27 - May 26, 2016" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2012 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ "Copyright (c) 1998-2002,2004,2006-2016 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 1.5.12 - July 11, 2012\ return "libpng version 1.5.27 - May 26, 2016\
Copyright (c) 1998-2012 Glenn Randers-Pehrson\ Copyright (c) 1998-2002,2004,2006-2016 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
@ -892,7 +893,8 @@ int png_XYZ_from_xy(png_XYZ *XYZ, 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;
@ -901,7 +903,7 @@ int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy)
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
@ -1165,6 +1167,17 @@ int png_XYZ_from_xy_checked(png_structp png_ptr, png_XYZ *XYZ, png_xy xy)
} }
#endif #endif
#ifdef __GNUC__
/* This exists solely to work round a warning from GNU C. */
static int /* PRIVATE */
png_gt(size_t a, size_t b)
{
return a > b;
}
#else
# define png_gt(a,b) ((a) > (b))
#endif
void /* PRIVATE */ void /* PRIVATE */
png_check_IHDR(png_structp png_ptr, png_check_IHDR(png_structp png_ptr,
png_uint_32 width, png_uint_32 height, int bit_depth, png_uint_32 width, png_uint_32 height, int bit_depth,
@ -1179,16 +1192,37 @@ png_check_IHDR(png_structp 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 (height == 0)
{ {
png_warning(png_ptr, "Image height is zero in IHDR"); png_warning(png_ptr, "Invalid image width in IHDR");
error = 1; error = 1;
} }
else if (png_gt(width,
(PNG_SIZE_MAX >> 3) /* 8-byte RGBA pixels */
- 48 /* big_row_buf hack */
- 1 /* filter byte */
- 7*8 /* rounding width to multiple of 8 pix */
- 8)) /* extra max_pixel_depth pad */
{
/* The size of the row must be within the limits of this architecture.
* Because the read code can perform arbitrary transformations the
* maximum size is checked here. Because the code in png_read_start_row
* adds extra space "for safety's sake" in several places a conservative
* limit is used here.
*
* NOTE: it would be far better to check the size that is actually used,
* but the effect in the real world is minor and the changes are more
* extensive, therefore much more dangerous and much more difficult to
* write in a way that avoids compiler warnings.
*/
png_warning(png_ptr, "Image width is too large for this architecture");
error = 1;
}
else
{
# ifdef PNG_SET_USER_LIMITS_SUPPORTED # ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (width > png_ptr->user_width_max) if (width > png_ptr->user_width_max)
# else # else
if (width > PNG_USER_WIDTH_MAX) if (width > PNG_USER_WIDTH_MAX)
# endif # endif
@ -1196,7 +1230,20 @@ png_check_IHDR(png_structp png_ptr,
png_warning(png_ptr, "Image width exceeds user limit in IHDR"); png_warning(png_ptr, "Image width exceeds user limit in IHDR");
error = 1; error = 1;
} }
}
if (height == 0)
{
png_warning(png_ptr, "Image height is zero in IHDR");
error = 1;
}
else if (height > PNG_UINT_31_MAX)
{
png_warning(png_ptr, "Invalid image height in IHDR");
error = 1;
}
else
{
# ifdef PNG_SET_USER_LIMITS_SUPPORTED # ifdef PNG_SET_USER_LIMITS_SUPPORTED
if (height > png_ptr->user_height_max) if (height > png_ptr->user_height_max)
# else # else
@ -1206,27 +1253,8 @@ png_check_IHDR(png_structp png_ptr,
png_warning(png_ptr, "Image height exceeds user limit in IHDR"); png_warning(png_ptr, "Image height exceeds user limit in IHDR");
error = 1; error = 1;
} }
if (width > PNG_UINT_31_MAX)
{
png_warning(png_ptr, "Invalid image width in IHDR");
error = 1;
} }
if (height > PNG_UINT_31_MAX)
{
png_warning(png_ptr, "Invalid image height in IHDR");
error = 1;
}
if (width > (PNG_UINT_32_MAX
>> 3) /* 8-byte RGBA pixels */
- 48 /* bigrowbuf hack */
- 1 /* filter byte */
- 7*8 /* rounding of width to multiple of 8 pixels */
- 8) /* extra max_pixel_depth pad */
png_warning(png_ptr, "Width is too large for libpng to process pixels");
/* Check other values */ /* Check other values */
if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
bit_depth != 8 && bit_depth != 16) bit_depth != 8 && bit_depth != 16)
@ -1458,7 +1486,7 @@ png_check_fp_string(png_const_charp string, png_size_t size)
} }
#endif /* pCAL or sCAL */ #endif /* pCAL or sCAL */
#ifdef PNG_READ_sCAL_SUPPORTED #ifdef PNG_sCAL_SUPPORTED
# ifdef PNG_FLOATING_POINT_SUPPORTED # ifdef PNG_FLOATING_POINT_SUPPORTED
/* Utility used below - a simple accurate power of ten from an integral /* Utility used below - a simple accurate power of ten from an integral
* exponent. * exponent.
@ -1490,7 +1518,7 @@ png_pow10(int power)
} }
while (power > 0); while (power > 0);
if (recip) d = 1/d; if (recip != 0) d = 1/d;
} }
/* else power is 0 and d is 1 */ /* else power is 0 and d is 1 */
@ -1722,7 +1750,7 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
/* 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!)
*/ */
@ -1730,7 +1758,7 @@ png_ascii_from_fp(png_structp 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.
@ -1904,7 +1932,7 @@ png_fixed(png_structp png_ptr, double fp, png_const_charp text)
#endif #endif
#if defined(PNG_READ_GAMMA_SUPPORTED) || \ #if defined(PNG_READ_GAMMA_SUPPORTED) || \
defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG__READ_pHYs_SUPPORTED) defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED)
/* muldiv functions */ /* muldiv functions */
/* This API takes signed arguments and rounds the result to the nearest /* This API takes signed arguments and rounds the result to the nearest
* integer (or, for a fixed point number - the standard argument - to * integer (or, for a fixed point number - the standard argument - to
@ -2008,7 +2036,7 @@ png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times,
if (s00 >= (D >> 1)) if (s00 >= (D >> 1))
++result; ++result;
if (negative) if (negative != 0)
result = -result; result = -result;
/* Check for overflow. */ /* Check for overflow. */
@ -2044,11 +2072,14 @@ png_muldiv_warn(png_structp png_ptr, png_fixed_point a, png_int_32 times,
} }
#endif #endif
#ifdef PNG_READ_GAMMA_SUPPORTED /* more fixed point functions for gamma */ #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_cHRM_SUPPORTED)
/* more fixed point functions for gamma and cHRM (xy/XYZ) suport. */
/* Calculate a reciprocal, return 0 on div-by-zero or overflow. */ /* Calculate a reciprocal, return 0 on div-by-zero or overflow. */
png_fixed_point png_fixed_point
png_reciprocal(png_fixed_point a) png_reciprocal(png_fixed_point a)
{ {
if (a != 0)
{
#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED #ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
double r = floor(1E10/a+.5); double r = floor(1E10/a+.5);
@ -2060,10 +2091,12 @@ png_reciprocal(png_fixed_point a)
if (png_muldiv(&res, 100000, 100000, a)) if (png_muldiv(&res, 100000, 100000, a))
return res; return res;
#endif #endif
}
return 0; /* error/overflow */ return 0; /* error/overflow */
} }
#ifdef PNG_READ_GAMMA_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)
@ -2085,6 +2118,7 @@ png_product2(png_fixed_point a, png_fixed_point b)
return 0; /* overflow */ return 0; /* overflow */
} }
#endif /* READ_GAMMA */
/* The inverse of the above. */ /* The inverse of the above. */
png_fixed_point png_fixed_point
@ -2092,17 +2126,20 @@ 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
if (a != 0 && b != 0)
{
double r = 1E15/a; double r = 1E15/a;
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
/* 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
* but this API is only used for the product of file and screen gamma so it * symmetric, but this API is only used for the product of file and
* doesn't matter that the smallest number it can produce is 1/21474, not * screen gamma so it doesn't matter that the smallest number it can
* 1/100000 * produce is 1/21474, not 1/100000
*/ */
png_fixed_point res = png_product2(a, b); png_fixed_point res = png_product2(a, b);
@ -2112,7 +2149,7 @@ png_reciprocal2(png_fixed_point a, png_fixed_point b)
return 0; /* overflow */ return 0; /* overflow */
} }
#endif /* READ_GAMMA */ #endif /* READ_GAMMA || cHRM */
#ifdef PNG_CHECK_cHRM_SUPPORTED #ifdef PNG_CHECK_cHRM_SUPPORTED
/* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2, /* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2,
@ -2523,6 +2560,7 @@ png_gamma_significant(png_fixed_point gamma_val)
gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED; gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED;
} }
#ifdef PNG_16BIT_SUPPORTED
/* Internal function to build a single 16-bit table - the table consists of /* Internal function to build a single 16-bit table - the table consists of
* 'num' 256-entry subtables, where 'num' is determined by 'shift' - the amount * 'num' 256-entry subtables, where 'num' is determined by 'shift' - the amount
* to shift the input values right (or 16-number_of_signifiant_bits). * to shift the input values right (or 16-number_of_signifiant_bits).
@ -2571,7 +2609,7 @@ png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable,
double d = floor(65535*pow(ig/(double)max, gamma_val*.00001)+.5); double d = floor(65535*pow(ig/(double)max, gamma_val*.00001)+.5);
sub_table[j] = (png_uint_16)d; sub_table[j] = (png_uint_16)d;
# else # else
if (shift) if (shift != 0)
ig = (ig * 65535U + max_by_2)/max; ig = (ig * 65535U + max_by_2)/max;
sub_table[j] = png_gamma_16bit_correct(ig, gamma_val); sub_table[j] = png_gamma_16bit_correct(ig, gamma_val);
@ -2587,7 +2625,7 @@ png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable,
{ {
png_uint_32 ig = (j << (8-shift)) + i; png_uint_32 ig = (j << (8-shift)) + i;
if (shift) if (shift != 0)
ig = (ig * 65535U + max_by_2)/max; ig = (ig * 65535U + max_by_2)/max;
sub_table[j] = (png_uint_16)ig; sub_table[j] = (png_uint_16)ig;
@ -2595,6 +2633,7 @@ png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable,
} }
} }
} }
#endif
/* NOTE: this function expects the *inverse* of the overall gamma transformation /* NOTE: this function expects the *inverse* of the overall gamma transformation
* required. * required.
@ -2872,3 +2911,24 @@ png_build_gamma_table(png_structp png_ptr, int bit_depth)
} }
#endif /* READ_GAMMA */ #endif /* READ_GAMMA */
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ #endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
/* HARDWARE OPTION SUPPORT */
#ifdef PNG_SET_OPTION_SUPPORTED
int PNGAPI
png_set_option(png_structp png_ptr, int option, int onoff)
{
if (png_ptr != NULL && option >= 0 && option < PNG_OPTION_NEXT &&
(option & 1) == 0)
{
int mask = 3 << option;
int setting = (2 + (onoff != 0)) << option;
int current = png_ptr->options;
png_ptr->options = (png_byte)((current & ~mask) | setting);
return (current & mask) >> option;
}
return PNG_OPTION_INVALID;
}
#endif

612
3rdparty/libpng/png.h vendored
View File

@ -1,8 +1,9 @@
/* png.h - header file for PNG reference library /* png.h - header file for PNG reference library
* *
* libpng version 1.5.12 - July 11, 2012 * libpng version 1.5.27, May 26, 2016
* Copyright (c) 1998-2012 Glenn Randers-Pehrson *
* Copyright (c) 1998-2002,2004,2006-2016 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.)
* *
@ -11,10 +12,146 @@
* Authors and maintainers: * Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.5.12 - July 11, 2012: Glenn * libpng versions 0.97, January 1998, through 1.5.27, May 26, 2016:
* Glenn Randers-Pehrson.
* See also "Contributing Authors", below. * See also "Contributing Authors", below.
*/
/*
* COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
* *
* Note about libpng version numbers: * If you modify libpng you may insert additional notices immediately following
* this sentence.
*
* This code is released under the libpng license.
*
* libpng versions 1.0.7, July 1, 2000, through 1.5.27, May 26, 2016, are
* Copyright (c) 2000-2002, 2004, 2006-2016 Glenn Randers-Pehrson, are
* derived from libpng-1.0.6, and are distributed according to the same
* disclaimer and license as libpng-1.0.6 with the following individuals
* added to the list of Contributing Authors:
*
* Simon-Pierre Cadieux
* Eric S. Raymond
* Mans Rullgard
* Cosmin Truta
* Gilles Vollant
*
* and with the following additions to the disclaimer:
*
* There is no warranty against interference with your enjoyment of the
* library or against infringement. There is no warranty that our
* efforts or the library will fulfill any of your particular purposes
* or needs. This library is provided with all faults, and the entire
* risk of satisfactory quality, performance, accuracy, and effort is with
* the user.
*
* libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
* Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
* libpng-0.96, and are distributed according to the same disclaimer and
* license as libpng-0.96, with the following individuals added to the list
* of Contributing Authors:
*
* Tom Lane
* Glenn Randers-Pehrson
* Willem van Schaik
*
* libpng versions 0.89, June 1996, through 0.96, May 1997, are
* Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
* and are distributed according to the same disclaimer and license as
* libpng-0.88, with the following individuals added to the list of
* Contributing Authors:
*
* John Bowler
* Kevin Bracey
* Sam Bushell
* Magnus Holmgren
* Greg Roelofs
* Tom Tanner
*
* libpng versions 0.5, May 1995, through 0.88, January 1996, are
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* For the purposes of this copyright and license, "Contributing Authors"
* is defined as the following set of individuals:
*
* Andreas Dilger
* Dave Martindale
* Guy Eric Schalnat
* Paul Schmidt
* Tim Wegner
*
* The PNG Reference Library is supplied "AS IS". The Contributing Authors
* and Group 42, Inc. disclaim all warranties, expressed or implied,
* including, without limitation, the warranties of merchantability and of
* fitness for any purpose. The Contributing Authors and Group 42, Inc.
* assume no liability for direct, indirect, incidental, special, exemplary,
* or consequential damages, which may result from the use of the PNG
* Reference Library, even if advised of the possibility of such damage.
*
* Permission is hereby granted to use, copy, modify, and distribute this
* source code, or portions hereof, for any purpose, without fee, subject
* to the following restrictions:
*
* 1. The origin of this source code must not be misrepresented.
*
* 2. Altered versions must be plainly marked as such and must not
* be misrepresented as being the original source.
*
* 3. This Copyright notice may not be removed or altered from any
* source or altered source distribution.
*
* The Contributing Authors and Group 42, Inc. specifically permit, without
* fee, and encourage the use of this source code as a component to
* supporting the PNG file format in commercial products. If you use this
* source code in a product, acknowledgment is not required but would be
* appreciated.
*
* END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE.
*
* TRADEMARK:
*
* The name "libpng" has not been registered by the Copyright owner
* as a trademark in any jurisdiction. However, because libpng has
* been distributed and maintained world-wide, continually since 1995,
* the Copyright owner claims "common-law trademark protection" in any
* jurisdiction where common-law trademark is recognized.
*
* OSI CERTIFICATION:
*
* Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
* a certification mark of the Open Source Initiative. OSI has not addressed
* the additional disclaimers inserted at version 1.0.7.
*
* EXPORT CONTROL:
*
* The Copyright owner believes that the Export Control Classification
* Number (ECCN) for libpng is EAR99, which means not subject to export
* controls or International Traffic in Arms Regulations (ITAR) because
* it is open source, publicly available software, that does not contain
* any encryption software. See the EAR, paragraphs 734.3(b)(3) and
* 734.7(b).
*/
/*
* A "png_get_copyright" function is available, for convenient use in "about"
* boxes and the like:
*
* printf("%s", png_get_copyright(NULL));
*
* Also, the PNG logo (in PNG format, of course) is supplied in the
* files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
*/
/*
* The contributing authors would like to thank all those who helped
* with testing, bug fixes, and patience. This wouldn't have been
* possible without all of you.
*
* Thanks to Frank J. T. Wojcik for helping with the documentation.
*/
/* Note about libpng version numbers:
* *
* Due to various miscommunications, unforeseen code incompatibilities * Due to various miscommunications, unforeseen code incompatibilities
* and occasional factors outside the authors' control, version numbering * and occasional factors outside the authors' control, version numbering
@ -58,126 +195,12 @@
* 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible) * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible)
* 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible) * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible)
* 1.0.7 1 10007 (still compatible) * 1.0.7 1 10007 (still compatible)
* 1.0.8beta1-4 1 10008 2.1.0.8beta1-4 * ...
* 1.0.8rc1 1 10008 2.1.0.8rc1 * 1.0.19 10 10019 10.so.0.19[.0]
* 1.0.8 1 10008 2.1.0.8 * ...
* 1.0.9beta1-6 1 10009 2.1.0.9beta1-6 * 1.2.56 13 10256 12.so.0.56[.0]
* 1.0.9rc1 1 10009 2.1.0.9rc1 * ...
* 1.0.9beta7-10 1 10009 2.1.0.9beta7-10 * 1.5.27 15 10527 15.so.15.27[.0]
* 1.0.9rc2 1 10009 2.1.0.9rc2
* 1.0.9 1 10009 2.1.0.9
* 1.0.10beta1 1 10010 2.1.0.10beta1
* 1.0.10rc1 1 10010 2.1.0.10rc1
* 1.0.10 1 10010 2.1.0.10
* 1.0.11beta1-3 1 10011 2.1.0.11beta1-3
* 1.0.11rc1 1 10011 2.1.0.11rc1
* 1.0.11 1 10011 2.1.0.11
* 1.0.12beta1-2 2 10012 2.1.0.12beta1-2
* 1.0.12rc1 2 10012 2.1.0.12rc1
* 1.0.12 2 10012 2.1.0.12
* 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned)
* 1.2.0beta1-2 2 10200 2.1.2.0beta1-2
* 1.2.0beta3-5 3 10200 3.1.2.0beta3-5
* 1.2.0rc1 3 10200 3.1.2.0rc1
* 1.2.0 3 10200 3.1.2.0
* 1.2.1beta1-4 3 10201 3.1.2.1beta1-4
* 1.2.1rc1-2 3 10201 3.1.2.1rc1-2
* 1.2.1 3 10201 3.1.2.1
* 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6
* 1.0.13beta1 10 10013 10.so.0.1.0.13beta1
* 1.0.13rc1 10 10013 10.so.0.1.0.13rc1
* 1.2.2rc1 12 10202 12.so.0.1.2.2rc1
* 1.0.13 10 10013 10.so.0.1.0.13
* 1.2.2 12 10202 12.so.0.1.2.2
* 1.2.3rc1-6 12 10203 12.so.0.1.2.3rc1-6
* 1.2.3 12 10203 12.so.0.1.2.3
* 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3
* 1.0.14rc1 13 10014 10.so.0.1.0.14rc1
* 1.2.4rc1 13 10204 12.so.0.1.2.4rc1
* 1.0.14 10 10014 10.so.0.1.0.14
* 1.2.4 13 10204 12.so.0.1.2.4
* 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2
* 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3
* 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3
* 1.0.15 10 10015 10.so.0.1.0.15
* 1.2.5 13 10205 12.so.0.1.2.5
* 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4
* 1.0.16 10 10016 10.so.0.1.0.16
* 1.2.6 13 10206 12.so.0.1.2.6
* 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2
* 1.0.17rc1 10 10017 12.so.0.1.0.17rc1
* 1.2.7rc1 13 10207 12.so.0.1.2.7rc1
* 1.0.17 10 10017 12.so.0.1.0.17
* 1.2.7 13 10207 12.so.0.1.2.7
* 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5
* 1.0.18rc1-5 10 10018 12.so.0.1.0.18rc1-5
* 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5
* 1.0.18 10 10018 12.so.0.1.0.18
* 1.2.8 13 10208 12.so.0.1.2.8
* 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3
* 1.2.9beta4-11 13 10209 12.so.0.9[.0]
* 1.2.9rc1 13 10209 12.so.0.9[.0]
* 1.2.9 13 10209 12.so.0.9[.0]
* 1.2.10beta1-7 13 10210 12.so.0.10[.0]
* 1.2.10rc1-2 13 10210 12.so.0.10[.0]
* 1.2.10 13 10210 12.so.0.10[.0]
* 1.4.0beta1-5 14 10400 14.so.0.0[.0]
* 1.2.11beta1-4 13 10211 12.so.0.11[.0]
* 1.4.0beta7-8 14 10400 14.so.0.0[.0]
* 1.2.11 13 10211 12.so.0.11[.0]
* 1.2.12 13 10212 12.so.0.12[.0]
* 1.4.0beta9-14 14 10400 14.so.0.0[.0]
* 1.2.13 13 10213 12.so.0.13[.0]
* 1.4.0beta15-36 14 10400 14.so.0.0[.0]
* 1.4.0beta37-87 14 10400 14.so.14.0[.0]
* 1.4.0rc01 14 10400 14.so.14.0[.0]
* 1.4.0beta88-109 14 10400 14.so.14.0[.0]
* 1.4.0rc02-08 14 10400 14.so.14.0[.0]
* 1.4.0 14 10400 14.so.14.0[.0]
* 1.4.1beta01-03 14 10401 14.so.14.1[.0]
* 1.4.1rc01 14 10401 14.so.14.1[.0]
* 1.4.1beta04-12 14 10401 14.so.14.1[.0]
* 1.4.1 14 10401 14.so.14.1[.0]
* 1.4.2 14 10402 14.so.14.2[.0]
* 1.4.3 14 10403 14.so.14.3[.0]
* 1.4.4 14 10404 14.so.14.4[.0]
* 1.5.0beta01-58 15 10500 15.so.15.0[.0]
* 1.5.0rc01-07 15 10500 15.so.15.0[.0]
* 1.5.0 15 10500 15.so.15.0[.0]
* 1.5.1beta01-11 15 10501 15.so.15.1[.0]
* 1.5.1rc01-02 15 10501 15.so.15.1[.0]
* 1.5.1 15 10501 15.so.15.1[.0]
* 1.5.2beta01-03 15 10502 15.so.15.2[.0]
* 1.5.2rc01-03 15 10502 15.so.15.2[.0]
* 1.5.2 15 10502 15.so.15.2[.0]
* 1.5.3beta01-10 15 10503 15.so.15.3[.0]
* 1.5.3rc01-02 15 10503 15.so.15.3[.0]
* 1.5.3beta11 15 10503 15.so.15.3[.0]
* 1.5.3 [omitted]
* 1.5.4beta01-08 15 10504 15.so.15.4[.0]
* 1.5.4rc01 15 10504 15.so.15.4[.0]
* 1.5.4 15 10504 15.so.15.4[.0]
* 1.5.5beta01-08 15 10505 15.so.15.5[.0]
* 1.5.5rc01 15 10505 15.so.15.5[.0]
* 1.5.5 15 10505 15.so.15.5[.0]
* 1.5.6beta01-07 15 10506 15.so.15.6[.0]
* 1.5.6rc01-03 15 10506 15.so.15.6[.0]
* 1.5.6 15 10506 15.so.15.6[.0]
* 1.5.7beta01-05 15 10507 15.so.15.7[.0]
* 1.5.7rc01-03 15 10507 15.so.15.7[.0]
* 1.5.7 15 10507 15.so.15.7[.0]
* 1.5.8beta01 15 10508 15.so.15.8[.0]
* 1.5.8rc01 15 10508 15.so.15.8[.0]
* 1.5.8 15 10508 15.so.15.8[.0]
* 1.5.9beta01-02 15 10509 15.so.15.9[.0]
* 1.5.9rc01 15 10509 15.so.15.9[.0]
* 1.5.9 15 10509 15.so.15.9[.0]
* 1.5.10beta01-05 15 10510 15.so.15.10[.0]
* 1.5.10 15 10510 15.so.15.10[.0]
* 1.5.11beta01 15 10511 15.so.15.11[.0]
* 1.5.11rc01-05 15 10511 15.so.15.11[.0]
* 1.5.11 15 10511 15.so.15.11[.0]
* 1.5.12 15 10512 15.so.15.12[.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
@ -196,138 +219,22 @@
* DLLNUM will change each time there are forward or backward changes * DLLNUM will change each time there are forward or backward changes
* in binary compatibility (e.g., when a new feature is added). * in binary compatibility (e.g., when a new feature is added).
* *
* See libpng-manual.txt or libpng.3 for more information. The PNG * See libpng.txt or libpng.3 for more information. The PNG specification
* specification is available as a W3C Recommendation and as an ISO * is available as a W3C Recommendation and as an ISO Specification,
* Specification, <http://www.w3.org/TR/2003/REC-PNG-20031110/ * <http://www.w3.org/TR/2003/REC-PNG-20031110/
*/
/*
* COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
*
* If you modify libpng you may insert additional notices immediately following
* this sentence.
*
* This code is released under the libpng license.
*
* libpng versions 1.2.6, August 15, 2004, through 1.5.12, July 11, 2012, are
* Copyright (c) 2004, 2006-2012 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
* with the following individuals added to the list of Contributing Authors:
*
* Simon-Pierre Cadieux
* Eric S. Raymond
* Gilles Vollant
*
* and with the following additions to the disclaimer:
*
* There is no warranty against interference with your enjoyment of the
* library or against infringement. There is no warranty that our
* efforts or the library will fulfill any of your particular purposes
* or needs. This library is provided with all faults, and the entire
* risk of satisfactory quality, performance, accuracy, and effort is with
* the user.
*
* libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
* Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are
* distributed according to the same disclaimer and license as libpng-0.96,
* with the following individuals added to the list of Contributing Authors:
*
* Tom Lane
* Glenn Randers-Pehrson
* Willem van Schaik
*
* libpng versions 0.89, June 1996, through 0.96, May 1997, are
* Copyright (c) 1996, 1997 Andreas Dilger
* Distributed according to the same disclaimer and license as libpng-0.88,
* with the following individuals added to the list of Contributing Authors:
*
* John Bowler
* Kevin Bracey
* Sam Bushell
* Magnus Holmgren
* Greg Roelofs
* Tom Tanner
*
* libpng versions 0.5, May 1995, through 0.88, January 1996, are
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
*
* For the purposes of this copyright and license, "Contributing Authors"
* is defined as the following set of individuals:
*
* Andreas Dilger
* Dave Martindale
* Guy Eric Schalnat
* Paul Schmidt
* Tim Wegner
*
* The PNG Reference Library is supplied "AS IS". The Contributing Authors
* and Group 42, Inc. disclaim all warranties, expressed or implied,
* including, without limitation, the warranties of merchantability and of
* fitness for any purpose. The Contributing Authors and Group 42, Inc.
* assume no liability for direct, indirect, incidental, special, exemplary,
* or consequential damages, which may result from the use of the PNG
* Reference Library, even if advised of the possibility of such damage.
*
* Permission is hereby granted to use, copy, modify, and distribute this
* source code, or portions hereof, for any purpose, without fee, subject
* to the following restrictions:
*
* 1. The origin of this source code must not be misrepresented.
*
* 2. Altered versions must be plainly marked as such and must not
* be misrepresented as being the original source.
*
* 3. This Copyright notice may not be removed or altered from
* any source or altered source distribution.
*
* The Contributing Authors and Group 42, Inc. specifically permit, without
* fee, and encourage the use of this source code as a component to
* supporting the PNG file format in commercial products. If you use this
* source code in a product, acknowledgment is not required but would be
* appreciated.
*/
/*
* A "png_get_copyright" function is available, for convenient use in "about"
* boxes and the like:
*
* printf("%s", png_get_copyright(NULL));
*
* Also, the PNG logo (in PNG format, of course) is supplied in the
* files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
*/
/*
* Libpng is OSI Certified Open Source Software. OSI Certified is a
* certification mark of the Open Source Initiative.
*/
/*
* The contributing authors would like to thank all those who helped
* with testing, bug fixes, and patience. This wouldn't have been
* possible without all of you.
*
* Thanks to Frank J. T. Wojcik for helping with the documentation.
*/ */
/* /*
* Y2K compliance in libpng: * Y2K compliance in libpng:
* ========================= * =========================
* *
* July 11, 2012 * May 26, 2016
* *
* 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 1.5.12 are Y2K compliant. It is my belief that * upward through 1.5.27 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
@ -379,16 +286,18 @@
/* This is not the place to learn how to use libpng. The file libpng-manual.txt /* This is not the place to learn how to use libpng. The file libpng-manual.txt
* describes how to use libpng, and the file example.c summarizes it * describes how to use libpng, and the file example.c summarizes it
* with some code on which to build. This file is useful for looking * with some code on which to build. This file is useful for looking
* at the actual function definitions and structure components. * at the actual function definitions and structure components. If that
* file has been stripped from your copy of libpng, you can find it at
* <http://www.libpng.org/pub/png/libpng-manual.txt>
* *
* If you just need to read a PNG file and don't want to read the documentation * If you just need to read a PNG file and don't want to read the documentation
* skip to the end of this file and read the section entitled 'simplified API'. * skip to the end of this file and read the section entitled 'simplified API'.
*/ */
/* 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 "1.5.12" #define PNG_LIBPNG_VER_STRING "1.5.27"
#define PNG_HEADER_VERSION_STRING \ #define PNG_HEADER_VERSION_STRING \
" libpng version 1.5.12 - July 11, 2012\n" " libpng version 1.5.27 - May 26, 2016\n"
#define PNG_LIBPNG_VER_SONUM 15 #define PNG_LIBPNG_VER_SONUM 15
#define PNG_LIBPNG_VER_DLLNUM 15 #define PNG_LIBPNG_VER_DLLNUM 15
@ -396,7 +305,7 @@
/* 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 5 #define PNG_LIBPNG_VER_MINOR 5
#define PNG_LIBPNG_VER_RELEASE 12 #define PNG_LIBPNG_VER_RELEASE 27
/* 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:
@ -427,7 +336,7 @@
* 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 10512 /* 1.5.12 */ #define PNG_LIBPNG_VER 10527 /* 1.5.27 */
/* 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.
@ -460,7 +369,7 @@
/* Machine specific configuration. */ /* Machine specific configuration. */
# include "pngconf.h" # include "pngconf.h"
#endif #endif /* PNG_VERSION_INFO_ONLY */
/* /*
* Added at libpng-1.2.8 * Added at libpng-1.2.8
@ -549,7 +458,7 @@ 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_5_12; typedef char* png_libpng_version_1_5_27;
/* Three color definitions. The order of the red, green, and blue, (and the /* Three color definitions. The order of the red, green, and blue, (and the
* exact size) is not important, although the size of the fields need to * exact size) is not important, although the size of the fields need to
@ -813,22 +722,22 @@ typedef png_info FAR * FAR * png_infopp;
* data in the info_struct to be written into the output file. The values * data in the info_struct to be written into the output file. The values
* of the PNG_INFO_<chunk> defines should NOT be changed. * of the PNG_INFO_<chunk> defines should NOT be changed.
*/ */
#define PNG_INFO_gAMA 0x0001 #define PNG_INFO_gAMA 0x0001U
#define PNG_INFO_sBIT 0x0002 #define PNG_INFO_sBIT 0x0002U
#define PNG_INFO_cHRM 0x0004 #define PNG_INFO_cHRM 0x0004U
#define PNG_INFO_PLTE 0x0008 #define PNG_INFO_PLTE 0x0008U
#define PNG_INFO_tRNS 0x0010 #define PNG_INFO_tRNS 0x0010U
#define PNG_INFO_bKGD 0x0020 #define PNG_INFO_bKGD 0x0020U
#define PNG_INFO_hIST 0x0040 #define PNG_INFO_hIST 0x0040U
#define PNG_INFO_pHYs 0x0080 #define PNG_INFO_pHYs 0x0080U
#define PNG_INFO_oFFs 0x0100 #define PNG_INFO_oFFs 0x0100U
#define PNG_INFO_tIME 0x0200 #define PNG_INFO_tIME 0x0200U
#define PNG_INFO_pCAL 0x0400 #define PNG_INFO_pCAL 0x0400U
#define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ #define PNG_INFO_sRGB 0x0800U /* GR-P, 0.96a */
#define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ #define PNG_INFO_iCCP 0x1000U /* ESR, 1.0.6 */
#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ #define PNG_INFO_sPLT 0x2000U /* ESR, 1.0.6 */
#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ #define PNG_INFO_sCAL 0x4000U /* ESR, 1.0.6 */
#define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */ #define PNG_INFO_IDAT 0x8000U /* ESR, 1.0.6 */
/* This is used for the transformation routines, as some of them /* This is used for the transformation routines, as some of them
* change these values for the row. It also should enable using * change these values for the row. It also should enable using
@ -1020,11 +929,13 @@ PNG_EXPORTA(5, png_structp, png_create_write_struct,
png_error_ptr warn_fn), png_error_ptr warn_fn),
PNG_ALLOCATED); PNG_ALLOCATED);
#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size, PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size,
(png_const_structp png_ptr)); (png_const_structp png_ptr));
PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr,
png_size_t size)); png_size_t size));
#endif /* WRITE_CUSTOMIZE_COMPRESSION */
/* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp /* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp
* match up. * match up.
@ -1158,9 +1069,9 @@ PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr));
#define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/ #define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/
PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr, PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr,
int error_action, double red, double green)); int error_action, double red, double green))
PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr, PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr,
int error_action, png_fixed_point red, png_fixed_point green)); int error_action, png_fixed_point red, png_fixed_point green))
PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp
png_ptr)); png_ptr));
@ -1228,9 +1139,9 @@ PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth,
#define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */ #define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */
PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structp png_ptr, int mode, PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structp png_ptr, int mode,
double output_gamma)); double output_gamma))
PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr, PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr,
int mode, png_fixed_point output_gamma)); int mode, png_fixed_point output_gamma))
#endif #endif
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED)
@ -1453,10 +1364,10 @@ PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr));
*/ */
PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr, PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr,
png_const_color_16p background_color, int background_gamma_code, png_const_color_16p background_color, int background_gamma_code,
int need_expand, double background_gamma)); int need_expand, double background_gamma))
PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr,
png_const_color_16p background_color, int background_gamma_code, png_const_color_16p background_color, int background_gamma_code,
int need_expand, png_fixed_point background_gamma)); int need_expand, png_fixed_point background_gamma))
#endif #endif
#ifdef PNG_READ_BACKGROUND_SUPPORTED #ifdef PNG_READ_BACKGROUND_SUPPORTED
# define PNG_BACKGROUND_GAMMA_UNKNOWN 0 # define PNG_BACKGROUND_GAMMA_UNKNOWN 0
@ -1471,7 +1382,7 @@ PNG_EXPORT(229, void, png_set_scale_16, (png_structp png_ptr));
#endif #endif
#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED
#define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */ #define PNG_READ_16_TO_8_SUPPORTED /* Name prior to 1.5.4 */
/* Strip the second byte of information from a 16-bit depth file. */ /* Strip the second byte of information from a 16-bit depth file. */
PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr)); PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr));
#endif #endif
@ -1505,9 +1416,9 @@ PNG_EXPORT(49, void, png_set_quantize,
*/ */
PNG_FP_EXPORT(50, void, png_set_gamma, PNG_FP_EXPORT(50, void, png_set_gamma,
(png_structp png_ptr, double screen_gamma, (png_structp png_ptr, double screen_gamma,
double override_file_gamma)); double override_file_gamma))
PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr, PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr,
png_fixed_point screen_gamma, png_fixed_point override_file_gamma)); png_fixed_point screen_gamma, png_fixed_point override_file_gamma))
#endif #endif
#ifdef PNG_WRITE_FLUSH_SUPPORTED #ifdef PNG_WRITE_FLUSH_SUPPORTED
@ -1623,8 +1534,8 @@ PNG_EXPORT(67, void, png_set_filter,
#define PNG_FILTER_UP 0x20 #define PNG_FILTER_UP 0x20
#define PNG_FILTER_AVG 0x40 #define PNG_FILTER_AVG 0x40
#define PNG_FILTER_PAETH 0x80 #define PNG_FILTER_PAETH 0x80
#define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ #define PNG_FAST_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP)
PNG_FILTER_AVG | PNG_FILTER_PAETH) #define PNG_ALL_FILTERS (PNG_FAST_FILTERS | PNG_FILTER_AVG | PNG_FILTER_PAETH)
/* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. /* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now.
* These defines should NOT be changed. * These defines should NOT be changed.
@ -1636,47 +1547,17 @@ PNG_EXPORT(67, void, png_set_filter,
#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_WEIGHTED_FILTER_SUPPORTED /* DEPRECATED */
/* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_
* 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_structp png_ptr, PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp 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))
PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed,
(png_structp png_ptr, (png_structp png_ptr,
int heuristic_method, int num_weights, png_const_fixed_point_p int heuristic_method, int num_weights, png_const_fixed_point_p
filter_weights, png_const_fixed_point_p filter_costs)); filter_weights, png_const_fixed_point_p filter_costs))
#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
/* 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 */
@ -1690,6 +1571,7 @@ 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_EXPORT(69, void, png_set_compression_level,
(png_structp png_ptr, int level)); (png_structp png_ptr, int level));
@ -1707,7 +1589,7 @@ PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr,
PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr, PNG_EXPORT(73, void, png_set_compression_method, (png_structp 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 */
@ -1729,6 +1611,7 @@ PNG_EXPORT(225, void, png_set_text_compression_window_bits, (png_structp
PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr, PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr,
int method)); int method));
#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ #endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */
#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,
@ -1940,6 +1823,8 @@ PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr,
#else #else
/* Fatal error in PNG image of libpng - can't continue */ /* Fatal error in PNG image of libpng - can't continue */
PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN); PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN);
# define png_error(s1,s2) png_err(s1)
# define png_chunk_error(s1,s2) png_err(s1)
#endif #endif
#ifdef PNG_WARNINGS_SUPPORTED #ifdef PNG_WARNINGS_SUPPORTED
@ -1950,6 +1835,9 @@ PNG_EXPORT(105, void, png_warning, (png_structp png_ptr,
/* Non-fatal error in libpng, chunk name is prepended to message. */ /* Non-fatal error in libpng, chunk name is prepended to message. */
PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr,
png_const_charp warning_message)); png_const_charp warning_message));
#else
# define png_warning(s1,s2) ((void)(s1))
# define png_chunk_warning(s1,s2) ((void)(s1))
#endif #endif
#ifdef PNG_BENIGN_ERRORS_SUPPORTED #ifdef PNG_BENIGN_ERRORS_SUPPORTED
@ -2053,9 +1941,9 @@ PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter,
/* Returns pixel aspect ratio, computed from pHYs chunk data. */ /* Returns pixel aspect ratio, computed from pHYs chunk data. */
PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio,
(png_const_structp png_ptr, png_const_infop info_ptr)); (png_const_structp png_ptr, png_const_infop info_ptr))
PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed,
(png_const_structp png_ptr, png_const_infop info_ptr)); (png_const_structp png_ptr, png_const_infop info_ptr))
/* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */
PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels,
@ -2088,11 +1976,11 @@ PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr,
PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr, PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr,
png_const_infop info_ptr, double *white_x, double *white_y, double *red_x, png_const_infop info_ptr, double *white_x, double *white_y, double *red_x,
double *red_y, double *green_x, double *green_y, double *blue_x, double *red_y, double *green_x, double *green_y, double *blue_x,
double *blue_y)); double *blue_y))
PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr, PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr,
png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z, png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z,
double *green_X, double *green_Y, double *green_Z, double *blue_X, double *green_X, double *green_Y, double *green_Z, double *blue_X,
double *blue_Y, double *blue_Z)); double *blue_Y, double *blue_Z))
#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ #ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */
PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed,
(png_const_structp png_ptr, (png_const_structp png_ptr,
@ -2100,7 +1988,7 @@ PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed,
png_fixed_point *int_white_y, png_fixed_point *int_red_x, png_fixed_point *int_white_y, png_fixed_point *int_red_x,
png_fixed_point *int_red_y, png_fixed_point *int_green_x, png_fixed_point *int_red_y, png_fixed_point *int_green_x,
png_fixed_point *int_green_y, png_fixed_point *int_blue_x, png_fixed_point *int_green_y, png_fixed_point *int_blue_x,
png_fixed_point *int_blue_y)); png_fixed_point *int_blue_y))
#endif #endif
PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed, PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed,
(png_structp png_ptr, png_const_infop info_ptr, (png_structp png_ptr, png_const_infop info_ptr,
@ -2108,46 +1996,46 @@ PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed,
png_fixed_point *int_red_Z, png_fixed_point *int_green_X, png_fixed_point *int_red_Z, png_fixed_point *int_green_X,
png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, png_fixed_point *int_green_Y, png_fixed_point *int_green_Z,
png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y,
png_fixed_point *int_blue_Z)); png_fixed_point *int_blue_Z))
#endif #endif
#ifdef PNG_cHRM_SUPPORTED #ifdef PNG_cHRM_SUPPORTED
PNG_FP_EXPORT(135, void, png_set_cHRM, PNG_FP_EXPORT(135, void, png_set_cHRM,
(png_structp png_ptr, png_infop info_ptr, (png_structp png_ptr, png_infop info_ptr,
double white_x, double white_y, double red_x, double red_y, double green_x, double white_x, double white_y, double red_x, double red_y, double green_x,
double green_y, double blue_x, double blue_y)); double green_y, double blue_x, double blue_y))
PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr, PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr,
png_infop info_ptr, double red_X, double red_Y, double red_Z, png_infop info_ptr, double red_X, double red_Y, double red_Z,
double green_X, double green_Y, double green_Z, double blue_X, double green_X, double green_Y, double green_Z, double blue_X,
double blue_Y, double blue_Z)); double blue_Y, double blue_Z))
PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr, PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr,
png_infop info_ptr, png_fixed_point int_white_x, png_infop info_ptr, png_fixed_point int_white_x,
png_fixed_point int_white_y, png_fixed_point int_red_x, png_fixed_point int_white_y, png_fixed_point int_red_x,
png_fixed_point int_red_y, png_fixed_point int_green_x, png_fixed_point int_red_y, png_fixed_point int_green_x,
png_fixed_point int_green_y, png_fixed_point int_blue_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
png_fixed_point int_blue_y)); png_fixed_point int_blue_y))
PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr, PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr,
png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y,
png_fixed_point int_red_Z, png_fixed_point int_green_X, png_fixed_point int_red_Z, png_fixed_point int_green_X,
png_fixed_point int_green_Y, png_fixed_point int_green_Z, png_fixed_point int_green_Y, png_fixed_point int_green_Z,
png_fixed_point int_blue_X, png_fixed_point int_blue_Y, png_fixed_point int_blue_X, png_fixed_point int_blue_Y,
png_fixed_point int_blue_Z)); png_fixed_point int_blue_Z))
#endif #endif
#ifdef PNG_gAMA_SUPPORTED #ifdef PNG_gAMA_SUPPORTED
PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA,
(png_const_structp png_ptr, png_const_infop info_ptr, (png_const_structp png_ptr, png_const_infop info_ptr,
double *file_gamma)); double *file_gamma))
PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed,
(png_const_structp png_ptr, png_const_infop info_ptr, (png_const_structp png_ptr, png_const_infop info_ptr,
png_fixed_point *int_file_gamma)); png_fixed_point *int_file_gamma))
#endif #endif
#ifdef PNG_gAMA_SUPPORTED #ifdef PNG_gAMA_SUPPORTED
PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr, PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr,
png_infop info_ptr, double file_gamma)); png_infop info_ptr, double file_gamma))
PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr, PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr,
png_infop info_ptr, png_fixed_point int_file_gamma)); png_infop info_ptr, png_fixed_point int_file_gamma))
#endif #endif
#ifdef PNG_hIST_SUPPORTED #ifdef PNG_hIST_SUPPORTED
@ -2313,7 +2201,7 @@ PNG_EXPORT(167, void, png_set_tRNS,
#ifdef PNG_sCAL_SUPPORTED #ifdef PNG_sCAL_SUPPORTED
PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL,
(png_const_structp png_ptr, png_const_infop info_ptr, (png_const_structp png_ptr, png_const_infop info_ptr,
int *unit, double *width, double *height)); int *unit, double *width, double *height))
#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED #ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
/* NOTE: this API is currently implemented using floating point arithmetic, /* NOTE: this API is currently implemented using floating point arithmetic,
* consequently it can only be used on systems with floating point support. * consequently it can only be used on systems with floating point support.
@ -2323,7 +2211,7 @@ PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL,
PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed,
(png_structp png_ptr, png_const_infop info_ptr, int *unit, (png_structp png_ptr, png_const_infop info_ptr, int *unit,
png_fixed_point *width, png_fixed_point *width,
png_fixed_point *height)); png_fixed_point *height))
#endif #endif
PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, PNG_EXPORT(169, png_uint_32, png_get_sCAL_s,
(png_const_structp png_ptr, png_const_infop info_ptr, (png_const_structp png_ptr, png_const_infop info_ptr,
@ -2331,10 +2219,10 @@ PNG_EXPORT(169, png_uint_32, png_get_sCAL_s,
PNG_FP_EXPORT(170, void, png_set_sCAL, PNG_FP_EXPORT(170, void, png_set_sCAL,
(png_structp png_ptr, png_infop info_ptr, (png_structp png_ptr, png_infop info_ptr,
int unit, double width, double height)); int unit, double width, double height))
PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr, PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr,
png_infop info_ptr, int unit, png_fixed_point width, png_infop info_ptr, int unit, png_fixed_point width,
png_fixed_point height)); png_fixed_point height))
PNG_EXPORT(171, void, png_set_sCAL_s, PNG_EXPORT(171, void, png_set_sCAL_s,
(png_structp png_ptr, png_infop info_ptr, (png_structp png_ptr, png_infop info_ptr,
int unit, png_const_charp swidth, png_const_charp sheight)); int unit, png_const_charp swidth, png_const_charp sheight));
@ -2447,17 +2335,17 @@ PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch,
(png_const_structp png_ptr, png_const_infop info_ptr)); (png_const_structp png_ptr, png_const_infop info_ptr));
PNG_FP_EXPORT(196, float, png_get_x_offset_inches, PNG_FP_EXPORT(196, float, png_get_x_offset_inches,
(png_const_structp png_ptr, png_const_infop info_ptr)); (png_const_structp png_ptr, png_const_infop info_ptr))
#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed,
(png_structp png_ptr, png_const_infop info_ptr)); (png_structp png_ptr, png_const_infop info_ptr))
#endif #endif
PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr, PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr,
png_const_infop info_ptr)); png_const_infop info_ptr))
#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed,
(png_structp png_ptr, png_const_infop info_ptr)); (png_structp png_ptr, png_const_infop info_ptr))
#endif #endif
# ifdef PNG_pHYs_SUPPORTED # ifdef PNG_pHYs_SUPPORTED
@ -2640,15 +2528,59 @@ PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i));
# define png_get_int_32(buf) \ # define png_get_int_32(buf) \
((png_int_32)((*(buf) & 0x80) \ ((png_int_32)((*(buf) & 0x80) \
? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \ ? -((png_int_32)(((png_get_uint_32(buf)^0xffffffffU)+1U)&0x7fffffffU)) \
: (png_int_32)png_get_uint_32(buf))) : (png_int_32)png_get_uint_32(buf)))
#endif #endif
#if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \ #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED)
PNG_EXPORT(234, void, png_set_check_for_invalid_index, (png_structp png_ptr, PNG_EXPORT(234, void, png_set_check_for_invalid_index, (png_structp png_ptr,
int allowed)); int allowed));
# ifdef PNG_GET_PALETTE_MAX_SUPPORTED
PNG_EXPORT(235, int, png_get_palette_max, (png_const_structp png_ptr,
png_const_infop info_ptr));
# endif
#endif /* CHECK_FOR_INVALID_INDEX */
/*******************************************************************************
* IMPLEMENTATION OPTIONS
*******************************************************************************
*
* Support for arbitrary implementation-specific optimizations. The API allows
* particular options to be turned on or off. 'Option' is the number of the
* option and 'onoff' is 0 (off) or non-0 (on). The value returned is given
* by the PNG_OPTION_ defines below.
*
* HARDWARE: normally hardware capabilites, such as the Intel SSE instructions,
* are detected at run time, however sometimes it may be impossible
* to do this in user mode, in which case it is necessary to discover
* the capabilities in an OS specific way. Such capabilities are
* listed here when libpng has support for them and must be turned
* ON by the application if present.
*
* SOFTWARE: sometimes software optimizations actually result in performance
* decrease on some architectures or systems, or with some sets of
* PNG images. 'Software' options allow such optimizations to be
* selected at run time.
*/
#ifdef PNG_SET_OPTION_SUPPORTED
#ifdef PNG_ARM_NEON_API_SUPPORTED
# define PNG_ARM_NEON 0 /* HARDWARE: ARM Neon SIMD instructions supported */
#endif #endif
#define PNG_OPTION_NEXT 2 /* Next option - numbers must be even */
/* Return values: NOTE: there are four values and 'off' is *not* zero */
#define PNG_OPTION_UNSET 0 /* Unset - defaults to off */
#define PNG_OPTION_INVALID 1 /* Option number out of range */
#define PNG_OPTION_OFF 2
#define PNG_OPTION_ON 3
PNG_EXPORT(236, int, png_set_option, (png_structp png_ptr, int option,
int onoff));
#endif
/*******************************************************************************
* END OF HARDWARE OPTIONS
******************************************************************************/
/* Maintainer: Put new public prototypes here ^, in libpng.3, and project /* Maintainer: Put new public prototypes here ^, in libpng.3, and project
* defs * defs
@ -2659,7 +2591,7 @@ PNG_EXPORT(234, void, png_set_check_for_invalid_index, (png_structp png_ptr,
* scripts/symbols.def as well. * scripts/symbols.def as well.
*/ */
#ifdef PNG_EXPORT_LAST_ORDINAL #ifdef PNG_EXPORT_LAST_ORDINAL
PNG_EXPORT_LAST_ORDINAL(234); PNG_EXPORT_LAST_ORDINAL(236);
#endif #endif
#ifdef __cplusplus #ifdef __cplusplus

38
3rdparty/libpng/pngconf.h vendored
View File

@ -1,9 +1,9 @@
/* pngconf.h - machine configurable file for libpng /* pngconf.h - machine configurable file for libpng
* *
* libpng version 1.5.12 - July 11, 2012 * libpng version 1.5.27, May 26, 2016
* *
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2013 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.)
* *
@ -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.
@ -177,18 +175,16 @@
* ========================== * ==========================
* This code is used at build time to find PNG_IMPEXP, the API settings * This code is used at build time to find PNG_IMPEXP, the API settings
* and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
* import processing is possible. On Windows/x86 systems it also sets * import processing is possible. On Windows systems it also sets
* compiler-specific macros to the values required to change the calling * compiler-specific macros to the values required to change the calling
* conventions of the various functions. * conventions of the various functions.
*/ */
#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ #if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\ defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\ /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or
defined(_M_X64) || defined(_M_IA64) ) * MinGW on any architecture currently supported by Windows. Also includes
/* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes * Watcom builds but these need special treatment because they are not
* builds under Cygwin or MinGW. Also includes Watcom builds but these need * compatible with GCC or Visual C because of different calling conventions.
* special treatment because they are not compatible with GCC or Visual C
* because of different calling conventions.
*/ */
# if PNG_API_RULE == 2 # if PNG_API_RULE == 2
/* If this line results in an error, either because __watcall is not /* If this line results in an error, either because __watcall is not
@ -199,9 +195,12 @@
# define PNGCAPI __watcall # define PNGCAPI __watcall
# endif # endif
# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800)) # if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
# define PNGCAPI __cdecl # define PNGCAPI __cdecl
# if PNG_API_RULE == 1 # if PNG_API_RULE == 1
/* If this line results in an error __stdcall is not understood and
* PNG_API_RULE should not have been set to '1'.
*/
# define PNGAPI __stdcall # define PNGAPI __stdcall
# endif # endif
# else # else
@ -239,7 +238,7 @@
# endif # endif
# endif /* compiler */ # endif /* compiler */
#else /* !Windows/x86 */ #else /* !Windows */
# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) # if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
# define PNGAPI _System # define PNGAPI _System
# else /* !Windows/x86 && !OS/2 */ # else /* !Windows/x86 && !OS/2 */
@ -337,6 +336,7 @@
* functions in png.h will generate compiler warnings. Added at libpng * functions in png.h will generate compiler warnings. Added at libpng
* version 1.2.41. * version 1.2.41.
*/ */
# if defined(__GNUC__) # if defined(__GNUC__)
# ifndef PNG_USE_RESULT # ifndef PNG_USE_RESULT
# define PNG_USE_RESULT __attribute__((__warn_unused_result__)) # define PNG_USE_RESULT __attribute__((__warn_unused_result__))
@ -344,6 +344,7 @@
# ifndef PNG_NORETURN # ifndef PNG_NORETURN
# define PNG_NORETURN __attribute__((__noreturn__)) # define PNG_NORETURN __attribute__((__noreturn__))
# endif # endif
# if __GNUC__ >= 3
# ifndef PNG_ALLOCATED # ifndef PNG_ALLOCATED
# define PNG_ALLOCATED __attribute__((__malloc__)) # define PNG_ALLOCATED __attribute__((__malloc__))
# endif # endif
@ -359,6 +360,7 @@
__attribute__((__deprecated__)) __attribute__((__deprecated__))
# endif # endif
# endif # endif
# endif /* __GNUC__ >= 3 */
# endif /* __GNUC__ */ # endif /* __GNUC__ */
# if defined(_MSC_VER) && (_MSC_VER >= 1300) # if defined(_MSC_VER) && (_MSC_VER >= 1300)
@ -400,7 +402,7 @@
#ifndef PNG_FP_EXPORT /* A floating point API. */ #ifndef PNG_FP_EXPORT /* A floating point API. */
# ifdef PNG_FLOATING_POINT_SUPPORTED # ifdef PNG_FLOATING_POINT_SUPPORTED
# define PNG_FP_EXPORT(ordinal, type, name, args)\ # define PNG_FP_EXPORT(ordinal, type, name, args)\
PNG_EXPORT(ordinal, type, name, args) PNG_EXPORT(ordinal, type, name, args);
# else /* No floating point APIs */ # else /* No floating point APIs */
# define PNG_FP_EXPORT(ordinal, type, name, args) # define PNG_FP_EXPORT(ordinal, type, name, args)
# endif # endif
@ -408,7 +410,7 @@
#ifndef PNG_FIXED_EXPORT /* A fixed point API. */ #ifndef PNG_FIXED_EXPORT /* A fixed point API. */
# ifdef PNG_FIXED_POINT_SUPPORTED # ifdef PNG_FIXED_POINT_SUPPORTED
# define PNG_FIXED_EXPORT(ordinal, type, name, args)\ # define PNG_FIXED_EXPORT(ordinal, type, name, args)\
PNG_EXPORT(ordinal, type, name, args) PNG_EXPORT(ordinal, type, name, args);
# else /* No fixed point APIs */ # else /* No fixed point APIs */
# define PNG_FIXED_EXPORT(ordinal, type, name, args) # define PNG_FIXED_EXPORT(ordinal, type, name, args)
# endif # endif

22
3rdparty/libpng/pngdebug.h vendored
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
* *
* Copyright (c) 1998-2011 Glenn Randers-Pehrson * Last changed in libpng 1.5.18 [February 6, 2014]
* Copyright (c) 1998-2002,2004,2006-2014 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 1.5.0 [January 6, 2011]
*
* 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
@ -25,7 +24,7 @@
* (actually ((void)0)). * (actually ((void)0)).
* *
* level: level of detail of message, starting at 0. A level 'n' * level: level of detail of message, starting at 0. A level 'n'
* message is preceded by 'n' tab characters (not implemented * message is preceded by 'n' 3-space indentations (not implemented
* on Microsoft compilers unless PNG_DEBUG_FILE is also * on Microsoft compilers unless PNG_DEBUG_FILE is also
* defined, to allow debug DLL compilation with no standard IO). * defined, to allow debug DLL compilation with no standard IO).
* message: a printf(3) style text string. A trailing '\n' is added * message: a printf(3) style text string. A trailing '\n' is added
@ -77,32 +76,29 @@
# endif /* PNG_DEBUG_FILE */ # endif /* PNG_DEBUG_FILE */
# if (PNG_DEBUG > 1) # if (PNG_DEBUG > 1)
/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
* non-ISO compilers
*/
# ifdef __STDC__ # ifdef __STDC__
# ifndef png_debug # ifndef png_debug
# define png_debug(l,m) \ # define png_debug(l,m) \
do { \ do { \
int num_tabs=l; \ int num_tabs=l; \
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \ (num_tabs==2 ? " " : (num_tabs>2 ? " " : "")))); \
} while (0) } while (0)
# endif # endif
# ifndef png_debug1 # ifndef png_debug1
# define png_debug1(l,m,p1) \ # define png_debug1(l,m,p1) \
do { \ do { \
int num_tabs=l; \ int num_tabs=l; \
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \ (num_tabs==2 ? " " : (num_tabs>2 ? " " : ""))),p1); \
} while (0) } while (0)
# endif # endif
# ifndef png_debug2 # ifndef png_debug2
# define png_debug2(l,m,p1,p2) \ # define png_debug2(l,m,p1,p2) \
do { \ do { \
int num_tabs=l; \ int num_tabs=l; \
fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
(num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \ (num_tabs==2 ? " " : (num_tabs>2 ? " " : ""))),p1,p2);\
} while (0) } while (0)
# endif # endif
# else /* __STDC __ */ # else /* __STDC __ */

13
3rdparty/libpng/pngerror.c vendored
View File

@ -1,8 +1,8 @@
/* pngerror.c - stub functions for i/o and memory allocation /* pngerror.c - stub functions for i/o and memory allocation
* *
* Last changed in libpng 1.5.8 [February 1, 2011] * Last changed in libpng 1.5.19 [August 21, 2014]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2014 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.)
* *
@ -161,7 +161,7 @@ png_format_number(png_const_charp start, png_charp end, int format,
case PNG_NUMBER_FORMAT_02u: case PNG_NUMBER_FORMAT_02u:
/* Expects at least 2 digits. */ /* Expects at least 2 digits. */
mincount = 2; mincount = 2;
/* fall through */ /* FALL THROUGH */
case PNG_NUMBER_FORMAT_u: case PNG_NUMBER_FORMAT_u:
*--end = digits[number % 10]; *--end = digits[number % 10];
@ -171,7 +171,7 @@ png_format_number(png_const_charp start, png_charp end, int format,
case PNG_NUMBER_FORMAT_02x: case PNG_NUMBER_FORMAT_02x:
/* This format expects at least two digits */ /* This format expects at least two digits */
mincount = 2; mincount = 2;
/* fall through */ /* FALL THROUGH */
case PNG_NUMBER_FORMAT_x: case PNG_NUMBER_FORMAT_x:
*--end = digits[number & 0xf]; *--end = digits[number & 0xf];
@ -193,7 +193,7 @@ png_format_number(png_const_charp start, png_charp end, int format,
* drop the decimal point. If the number is a true zero handle that * drop the decimal point. If the number is a true zero handle that
* here. * here.
*/ */
if (output) if (output != 0)
*--end = '.'; *--end = '.';
else if (number == 0) /* and !output */ else if (number == 0) /* and !output */
*--end = '0'; *--end = '0';
@ -578,6 +578,9 @@ png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN)
png_ptr->longjmp_fn(png_ptr->longjmp_buffer, val); png_ptr->longjmp_fn(png_ptr->longjmp_buffer, val);
# endif # endif
} }
#else
PNG_UNUSED(png_ptr);
PNG_UNUSED(val);
#endif #endif
/* Here if not setjmp support or if png_ptr is null. */ /* Here if not setjmp support or if png_ptr is null. */
PNG_ABORT(); PNG_ABORT();

56
3rdparty/libpng/pngget.c vendored
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 1.5.7 [December 15, 2011] * Last changed in libpng 1.5.19 [August 21, 2014]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2014 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.)
* *
@ -123,6 +123,9 @@ png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER) if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
return (info_ptr->x_pixels_per_unit); return (info_ptr->x_pixels_per_unit);
} }
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif #endif
return (0); return (0);
@ -140,6 +143,9 @@ png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER) if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
return (info_ptr->y_pixels_per_unit); return (info_ptr->y_pixels_per_unit);
} }
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif #endif
return (0); return (0);
@ -157,6 +163,9 @@ png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit) info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit)
return (info_ptr->x_pixels_per_unit); return (info_ptr->x_pixels_per_unit);
} }
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif #endif
return (0); return (0);
@ -175,6 +184,9 @@ png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr)
return ((float)((float)info_ptr->y_pixels_per_unit return ((float)((float)info_ptr->y_pixels_per_unit
/(float)info_ptr->x_pixels_per_unit)); /(float)info_ptr->x_pixels_per_unit));
} }
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif #endif
return ((float)0.0); return ((float)0.0);
@ -203,6 +215,9 @@ png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr,
(png_int_32)info_ptr->x_pixels_per_unit)) (png_int_32)info_ptr->x_pixels_per_unit))
return res; return res;
} }
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif #endif
return 0; return 0;
@ -220,6 +235,9 @@ png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER) if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
return (info_ptr->x_offset); return (info_ptr->x_offset);
} }
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif #endif
return (0); return (0);
@ -236,6 +254,9 @@ png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER) if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
return (info_ptr->y_offset); return (info_ptr->y_offset);
} }
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif #endif
return (0); return (0);
@ -252,6 +273,9 @@ png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL) if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
return (info_ptr->x_offset); return (info_ptr->x_offset);
} }
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif #endif
return (0); return (0);
@ -268,6 +292,9 @@ png_get_y_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL) if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
return (info_ptr->y_offset); return (info_ptr->y_offset);
} }
#else
PNG_UNUSED(png_ptr)
PNG_UNUSED(info_ptr)
#endif #endif
return (0); return (0);
@ -646,7 +673,7 @@ png_get_gAMA(png_const_structp png_ptr, png_const_infop info_ptr,
png_fixed_point igamma; png_fixed_point igamma;
png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma); png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma);
if (ok) if (ok != 0)
*file_gamma = png_float(png_ptr, igamma, "png_get_gAMA"); *file_gamma = png_float(png_ptr, igamma, "png_get_gAMA");
return ok; return ok;
@ -741,13 +768,19 @@ png_get_IHDR(png_structp png_ptr, png_infop 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);
if (width != NULL)
*width = info_ptr->width; *width = info_ptr->width;
if (height != NULL)
*height = info_ptr->height; *height = info_ptr->height;
if (bit_depth != NULL)
*bit_depth = info_ptr->bit_depth; *bit_depth = info_ptr->bit_depth;
if (color_type != NULL)
*color_type = info_ptr->color_type; *color_type = info_ptr->color_type;
if (compression_type != NULL) if (compression_type != NULL)
@ -1121,4 +1154,17 @@ png_get_io_chunk_name (png_structp png_ptr)
} }
#endif /* ?PNG_IO_STATE_SUPPORTED */ #endif /* ?PNG_IO_STATE_SUPPORTED */
#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
# ifdef PNG_GET_PALETTE_MAX_SUPPORTED
int PNGAPI
png_get_palette_max(png_const_structp png_ptr, png_const_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return png_ptr->num_palette_max;
return (-1);
}
# endif
#endif
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

7
3rdparty/libpng/pnginfo.h vendored
View File

@ -1,12 +1,11 @@
/* pnginfo.h - header file for PNG reference library /* pnginfo.h - header file for PNG reference library
* *
* Copyright (c) 1998-2011 Glenn Randers-Pehrson * Last changed in libpng 1.5.0 [January 6, 2011]
* Copyright (c) 1998-2002,2004,2006-2011 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 1.5.0 [January 6, 2011]
*
* 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
@ -242,7 +241,7 @@ defined(PNG_READ_BACKGROUND_SUPPORTED)
#ifdef PNG_sPLT_SUPPORTED #ifdef PNG_sPLT_SUPPORTED
/* Data on sPLT chunks (there may be more than one). */ /* Data on sPLT chunks (there may be more than one). */
png_sPLT_tp splt_palettes; png_sPLT_tp splt_palettes;
png_uint_32 splt_palettes_num; int splt_palettes_num;
#endif #endif
#ifdef PNG_sCAL_SUPPORTED #ifdef PNG_sCAL_SUPPORTED

157
3rdparty/libpng/pnglibconf.h vendored
View File

@ -1,48 +1,28 @@
/* 1.5.27 STANDARD API DEFINITION */
/* libpng STANDARD API DEFINITION */
/* pnglibconf.h - library build configuration */ /* pnglibconf.h - library build configuration */
/* Libpng 1.5.12 - July 11, 2012 */ /* libpng version 1.5.27 - May 26, 2016 */
/* Copyright (c) 1998-2012 Glenn Randers-Pehrson */ /* Copyright (c) 2011-2015 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 */
/* and license in png.h */ /* and license in png.h */
/* pnglibconf.h */ /* pnglibconf.h */
/* Machine generated file: DO NOT EDIT */
/* Derived from: scripts/pnglibconf.dfa */ /* Derived from: scripts/pnglibconf.dfa */
/* If you edit this file by hand you must obey the rules expressed in */
/* pnglibconf.dfa with respect to the dependencies between the following */
/* symbols. It is much better to generate a new file using */
/* scripts/libpngconf.mak */
#ifndef PNGLCONF_H #ifndef PNGLCONF_H
#define PNGLCONF_H #define PNGLCONF_H
/* settings */
#define PNG_API_RULE 0
#define PNG_CALLOC_SUPPORTED
#define PNG_COST_SHIFT 3
#define PNG_DEFAULT_READ_MACROS 1
#define PNG_GAMMA_THRESHOLD_FIXED 5000
#define PNG_MAX_GAMMA_8 11
#define PNG_QUANTIZE_BLUE_BITS 5
#define PNG_QUANTIZE_GREEN_BITS 5
#define PNG_QUANTIZE_RED_BITS 5
#define PNG_sCAL_PRECISION 5
#define PNG_WEIGHT_SHIFT 8
#define PNG_ZBUF_SIZE 8192
/* end of settings */
/* options */ /* options */
#define PNG_16BIT_SUPPORTED #define PNG_16BIT_SUPPORTED
#define PNG_ALIGN_MEMORY_SUPPORTED #define PNG_ALIGNED_MEMORY_SUPPORTED
/*#undef PNG_ARM_NEON_API_SUPPORTED*/
/*#undef PNG_ARM_NEON_CHECK_SUPPORTED*/
#define PNG_BENIGN_ERRORS_SUPPORTED #define PNG_BENIGN_ERRORS_SUPPORTED
#define PNG_bKGD_SUPPORTED
#define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED #define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED
#define PNG_CHECK_cHRM_SUPPORTED
#define PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED #define PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
#define PNG_cHRM_SUPPORTED #define PNG_CHECK_cHRM_SUPPORTED
#define PNG_CONSOLE_IO_SUPPORTED #define PNG_CONSOLE_IO_SUPPORTED
#define PNG_CONVERT_tIME_SUPPORTED #define PNG_CONVERT_tIME_SUPPORTED
#define PNG_EASY_ACCESS_SUPPORTED #define PNG_EASY_ACCESS_SUPPORTED
@ -51,18 +31,12 @@
#define PNG_FIXED_POINT_SUPPORTED #define PNG_FIXED_POINT_SUPPORTED
#define PNG_FLOATING_ARITHMETIC_SUPPORTED #define PNG_FLOATING_ARITHMETIC_SUPPORTED
#define PNG_FLOATING_POINT_SUPPORTED #define PNG_FLOATING_POINT_SUPPORTED
#define PNG_gAMA_SUPPORTED #define PNG_GET_PALETTE_MAX_SUPPORTED
#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED #define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
#define PNG_hIST_SUPPORTED
#define PNG_iCCP_SUPPORTED
#define PNG_INCH_CONVERSIONS_SUPPORTED #define PNG_INCH_CONVERSIONS_SUPPORTED
#define PNG_INFO_IMAGE_SUPPORTED #define PNG_INFO_IMAGE_SUPPORTED
#define PNG_IO_STATE_SUPPORTED #define PNG_IO_STATE_SUPPORTED
#define PNG_iTXt_SUPPORTED
#define PNG_MNG_FEATURES_SUPPORTED #define PNG_MNG_FEATURES_SUPPORTED
#define PNG_oFFs_SUPPORTED
#define PNG_pCAL_SUPPORTED
#define PNG_pHYs_SUPPORTED
#define PNG_POINTER_INDEXING_SUPPORTED #define PNG_POINTER_INDEXING_SUPPORTED
#define PNG_PROGRESSIVE_READ_SUPPORTED #define PNG_PROGRESSIVE_READ_SUPPORTED
#define PNG_READ_16BIT_SUPPORTED #define PNG_READ_16BIT_SUPPORTED
@ -70,68 +44,62 @@
#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED #define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
#define PNG_READ_BACKGROUND_SUPPORTED #define PNG_READ_BACKGROUND_SUPPORTED
#define PNG_READ_BGR_SUPPORTED #define PNG_READ_BGR_SUPPORTED
#define PNG_READ_bKGD_SUPPORTED
#define PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED #define PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED
#define PNG_READ_cHRM_SUPPORTED
#define PNG_READ_COMPOSITE_NODIV_SUPPORTED #define PNG_READ_COMPOSITE_NODIV_SUPPORTED
#define PNG_READ_COMPRESSED_TEXT_SUPPORTED #define PNG_READ_COMPRESSED_TEXT_SUPPORTED
#define PNG_READ_EXPAND_16_SUPPORTED #define PNG_READ_EXPAND_16_SUPPORTED
#define PNG_READ_EXPAND_SUPPORTED #define PNG_READ_EXPAND_SUPPORTED
#define PNG_READ_FILLER_SUPPORTED #define PNG_READ_FILLER_SUPPORTED
#define PNG_READ_gAMA_SUPPORTED
#define PNG_READ_GAMMA_SUPPORTED #define PNG_READ_GAMMA_SUPPORTED
#define PNG_READ_GET_PALETTE_MAX_SUPPORTED
#define PNG_READ_GRAY_TO_RGB_SUPPORTED #define PNG_READ_GRAY_TO_RGB_SUPPORTED
#define PNG_READ_hIST_SUPPORTED
#define PNG_READ_iCCP_SUPPORTED
#define PNG_READ_INTERLACING_SUPPORTED #define PNG_READ_INTERLACING_SUPPORTED
#define PNG_READ_INT_FUNCTIONS_SUPPORTED #define PNG_READ_INT_FUNCTIONS_SUPPORTED
#define PNG_READ_INVERT_ALPHA_SUPPORTED #define PNG_READ_INVERT_ALPHA_SUPPORTED
#define PNG_READ_INVERT_SUPPORTED #define PNG_READ_INVERT_SUPPORTED
#define PNG_READ_iTXt_SUPPORTED
#define PNG_READ_oFFs_SUPPORTED
#define PNG_READ_OPT_PLTE_SUPPORTED #define PNG_READ_OPT_PLTE_SUPPORTED
#define PNG_READ_PACK_SUPPORTED
#define PNG_READ_PACKSWAP_SUPPORTED #define PNG_READ_PACKSWAP_SUPPORTED
#define PNG_READ_pCAL_SUPPORTED #define PNG_READ_PACK_SUPPORTED
#define PNG_READ_pHYs_SUPPORTED
#define PNG_READ_QUANTIZE_SUPPORTED #define PNG_READ_QUANTIZE_SUPPORTED
#define PNG_READ_RGB_TO_GRAY_SUPPORTED #define PNG_READ_RGB_TO_GRAY_SUPPORTED
#define PNG_READ_sBIT_SUPPORTED
#define PNG_READ_SCALE_16_TO_8_SUPPORTED #define PNG_READ_SCALE_16_TO_8_SUPPORTED
#define PNG_READ_sCAL_SUPPORTED
#define PNG_READ_SHIFT_SUPPORTED #define PNG_READ_SHIFT_SUPPORTED
#define PNG_READ_sPLT_SUPPORTED
#define PNG_READ_sRGB_SUPPORTED
#define PNG_READ_STRIP_16_TO_8_SUPPORTED #define PNG_READ_STRIP_16_TO_8_SUPPORTED
#define PNG_READ_STRIP_ALPHA_SUPPORTED #define PNG_READ_STRIP_ALPHA_SUPPORTED
#define PNG_READ_SUPPORTED #define PNG_READ_SUPPORTED
#define PNG_READ_SWAP_ALPHA_SUPPORTED #define PNG_READ_SWAP_ALPHA_SUPPORTED
#define PNG_READ_SWAP_SUPPORTED #define PNG_READ_SWAP_SUPPORTED
#define PNG_READ_tEXt_SUPPORTED
#define PNG_READ_TEXT_SUPPORTED #define PNG_READ_TEXT_SUPPORTED
#define PNG_READ_tIME_SUPPORTED
#define PNG_READ_TRANSFORMS_SUPPORTED #define PNG_READ_TRANSFORMS_SUPPORTED
#define PNG_READ_tRNS_SUPPORTED
#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED #define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_READ_USER_CHUNKS_SUPPORTED #define PNG_READ_USER_CHUNKS_SUPPORTED
#define PNG_READ_USER_TRANSFORM_SUPPORTED #define PNG_READ_USER_TRANSFORM_SUPPORTED
#define PNG_READ_bKGD_SUPPORTED
#define PNG_READ_cHRM_SUPPORTED
#define PNG_READ_gAMA_SUPPORTED
#define PNG_READ_hIST_SUPPORTED
#define PNG_READ_iCCP_SUPPORTED
#define PNG_READ_iTXt_SUPPORTED
#define PNG_READ_oFFs_SUPPORTED
#define PNG_READ_pCAL_SUPPORTED
#define PNG_READ_pHYs_SUPPORTED
#define PNG_READ_sBIT_SUPPORTED
#define PNG_READ_sCAL_SUPPORTED
#define PNG_READ_sPLT_SUPPORTED
#define PNG_READ_sRGB_SUPPORTED
#define PNG_READ_tEXt_SUPPORTED
#define PNG_READ_tIME_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_sBIT_SUPPORTED
#define PNG_sCAL_SUPPORTED
#define PNG_SEQUENTIAL_READ_SUPPORTED #define PNG_SEQUENTIAL_READ_SUPPORTED
#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
#define PNG_SETJMP_SUPPORTED #define PNG_SETJMP_SUPPORTED
/*#undef PNG_SET_OPTION_SUPPORTED*/
#define PNG_SET_USER_LIMITS_SUPPORTED #define PNG_SET_USER_LIMITS_SUPPORTED
#define PNG_sPLT_SUPPORTED
#define PNG_sRGB_SUPPORTED
#define PNG_STDIO_SUPPORTED #define PNG_STDIO_SUPPORTED
#define PNG_tEXt_SUPPORTED
#define PNG_TEXT_SUPPORTED #define PNG_TEXT_SUPPORTED
#define PNG_TIME_RFC1123_SUPPORTED #define PNG_TIME_RFC1123_SUPPORTED
#define PNG_tIME_SUPPORTED
#define PNG_tRNS_SUPPORTED
#define PNG_UNKNOWN_CHUNKS_SUPPORTED #define PNG_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_USER_CHUNKS_SUPPORTED #define PNG_USER_CHUNKS_SUPPORTED
#define PNG_USER_LIMITS_SUPPORTED #define PNG_USER_LIMITS_SUPPORTED
@ -142,45 +110,78 @@
#define PNG_WRITE_16BIT_SUPPORTED #define PNG_WRITE_16BIT_SUPPORTED
#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED #define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
#define PNG_WRITE_BGR_SUPPORTED #define PNG_WRITE_BGR_SUPPORTED
#define PNG_WRITE_bKGD_SUPPORTED
#define PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED #define PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED
#define PNG_WRITE_cHRM_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
#define PNG_WRITE_FLUSH_SUPPORTED #define PNG_WRITE_FLUSH_SUPPORTED
#define PNG_WRITE_gAMA_SUPPORTED #define PNG_WRITE_GET_PALETTE_MAX_SUPPORTED
#define PNG_WRITE_hIST_SUPPORTED
#define PNG_WRITE_iCCP_SUPPORTED
#define PNG_WRITE_INTERLACING_SUPPORTED #define PNG_WRITE_INTERLACING_SUPPORTED
#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED #define PNG_WRITE_INT_FUNCTIONS_SUPPORTED
#define PNG_WRITE_INVERT_ALPHA_SUPPORTED #define PNG_WRITE_INVERT_ALPHA_SUPPORTED
#define PNG_WRITE_INVERT_SUPPORTED #define PNG_WRITE_INVERT_SUPPORTED
#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
#define PNG_WRITE_PACKSWAP_SUPPORTED
#define PNG_WRITE_PACK_SUPPORTED
#define PNG_WRITE_SHIFT_SUPPORTED
#define PNG_WRITE_SUPPORTED
#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
#define PNG_WRITE_SWAP_SUPPORTED
#define PNG_WRITE_TEXT_SUPPORTED
#define PNG_WRITE_TRANSFORMS_SUPPORTED
#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_WRITE_USER_TRANSFORM_SUPPORTED
#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
#define PNG_WRITE_bKGD_SUPPORTED
#define PNG_WRITE_cHRM_SUPPORTED
#define PNG_WRITE_gAMA_SUPPORTED
#define PNG_WRITE_hIST_SUPPORTED
#define PNG_WRITE_iCCP_SUPPORTED
#define PNG_WRITE_iTXt_SUPPORTED #define PNG_WRITE_iTXt_SUPPORTED
#define PNG_WRITE_oFFs_SUPPORTED #define PNG_WRITE_oFFs_SUPPORTED
#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
#define PNG_WRITE_PACK_SUPPORTED
#define PNG_WRITE_PACKSWAP_SUPPORTED
#define PNG_WRITE_pCAL_SUPPORTED #define PNG_WRITE_pCAL_SUPPORTED
#define PNG_WRITE_pHYs_SUPPORTED #define PNG_WRITE_pHYs_SUPPORTED
#define PNG_WRITE_sBIT_SUPPORTED #define PNG_WRITE_sBIT_SUPPORTED
#define PNG_WRITE_sCAL_SUPPORTED #define PNG_WRITE_sCAL_SUPPORTED
#define PNG_WRITE_SHIFT_SUPPORTED
#define PNG_WRITE_sPLT_SUPPORTED #define PNG_WRITE_sPLT_SUPPORTED
#define PNG_WRITE_sRGB_SUPPORTED #define PNG_WRITE_sRGB_SUPPORTED
#define PNG_WRITE_SUPPORTED
#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
#define PNG_WRITE_SWAP_SUPPORTED
#define PNG_WRITE_tEXt_SUPPORTED #define PNG_WRITE_tEXt_SUPPORTED
#define PNG_WRITE_TEXT_SUPPORTED
#define PNG_WRITE_tIME_SUPPORTED #define PNG_WRITE_tIME_SUPPORTED
#define PNG_WRITE_TRANSFORMS_SUPPORTED
#define PNG_WRITE_tRNS_SUPPORTED #define PNG_WRITE_tRNS_SUPPORTED
#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_WRITE_USER_TRANSFORM_SUPPORTED
#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
#define PNG_WRITE_zTXt_SUPPORTED #define PNG_WRITE_zTXt_SUPPORTED
#define PNG_bKGD_SUPPORTED
#define PNG_cHRM_SUPPORTED
#define PNG_gAMA_SUPPORTED
#define PNG_hIST_SUPPORTED
#define PNG_iCCP_SUPPORTED
#define PNG_iTXt_SUPPORTED
#define PNG_oFFs_SUPPORTED
#define PNG_pCAL_SUPPORTED
#define PNG_pHYs_SUPPORTED
#define PNG_sBIT_SUPPORTED
#define PNG_sCAL_SUPPORTED
#define PNG_sPLT_SUPPORTED
#define PNG_sRGB_SUPPORTED
#define PNG_tEXt_SUPPORTED
#define PNG_tIME_SUPPORTED
#define PNG_tRNS_SUPPORTED
#define PNG_zTXt_SUPPORTED #define PNG_zTXt_SUPPORTED
/* end of options */ /* end of options */
/* settings */
#define PNG_API_RULE 0
#define PNG_DEFAULT_READ_MACROS 1
#define PNG_GAMMA_THRESHOLD_FIXED 5000
#define PNG_MAX_GAMMA_8 11
#define PNG_QUANTIZE_BLUE_BITS 5
#define PNG_QUANTIZE_GREEN_BITS 5
#define PNG_QUANTIZE_RED_BITS 5
#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_ZBUF_SIZE 8192
#define PNG_sCAL_PRECISION 5
/* end of settings */
#endif /* PNGLCONF_H */ #endif /* PNGLCONF_H */

12
3rdparty/libpng/pngmem.c vendored
View File

@ -1,8 +1,8 @@
/* pngmem.c - stub functions for memory allocation /* pngmem.c - stub functions for memory allocation
* *
* Last changed in libpng 1.5.7 [December 15, 2011] * Last changed in libpng 1.5.13 [September 27, 2012]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2012 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.)
* *
@ -56,7 +56,7 @@ png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr),
if (malloc_fn != NULL) if (malloc_fn != NULL)
{ {
png_struct dummy_struct; png_struct dummy_struct;
memset(&dummy_struct, 0, sizeof dummy_struct); png_memset(&dummy_struct, 0, sizeof dummy_struct);
dummy_struct.mem_ptr=mem_ptr; dummy_struct.mem_ptr=mem_ptr;
struct_ptr = (*(malloc_fn))(&dummy_struct, (png_alloc_size_t)size); struct_ptr = (*(malloc_fn))(&dummy_struct, (png_alloc_size_t)size);
} }
@ -90,7 +90,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
if (free_fn != NULL) if (free_fn != NULL)
{ {
png_struct dummy_struct; png_struct dummy_struct;
memset(&dummy_struct, 0, sizeof dummy_struct); png_memset(&dummy_struct, 0, sizeof dummy_struct);
dummy_struct.mem_ptr=mem_ptr; dummy_struct.mem_ptr=mem_ptr;
(*(free_fn))(&dummy_struct, struct_ptr); (*(free_fn))(&dummy_struct, struct_ptr);
return; return;
@ -102,7 +102,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
} }
/* 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.
@ -475,7 +475,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
} }
/* 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.

126
3rdparty/libpng/pngpread.c vendored
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 1.5.11 [June 14, 2012] * Last changed in libpng 1.5.23 [July 23, 2015]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2015 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
@ -49,7 +48,7 @@ png_process_data_pause(png_structp png_ptr, int save)
/* It's easiest for the caller if we do the save, then the caller doesn't /* It's easiest for the caller if we do the save, then the caller doesn't
* have to supply the same data again: * have to supply the same data again:
*/ */
if (save) if (save != 0)
png_push_save_buffer(png_ptr); png_push_save_buffer(png_ptr);
else else
{ {
@ -71,32 +70,15 @@ png_process_data_pause(png_structp png_ptr, int save)
png_uint_32 PNGAPI png_uint_32 PNGAPI
png_process_data_skip(png_structp png_ptr) png_process_data_skip(png_structp 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
* above) so we can detect a broken call here:
*/ */
if (png_ptr->buffer_size != 0) png_warning(png_ptr,
png_error(png_ptr, "png_process_data_skip is not implemented in any current version"
"png_process_data_skip called inside png_process_data"); " of libpng");
return 0;
/* 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
@ -128,12 +110,6 @@ png_process_some_data(png_structp png_ptr, png_infop 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;
@ -151,7 +127,7 @@ png_process_some_data(png_structp png_ptr, png_infop info_ptr)
void /* PRIVATE */ void /* PRIVATE */
png_push_read_sig(png_structp png_ptr, png_infop info_ptr) png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
{ {
png_size_t num_checked = png_ptr->sig_bytes, png_size_t num_checked = png_ptr->sig_bytes, /* SAFE, does not exceed 8 */
num_to_check = 8 - num_checked; num_to_check = 8 - num_checked;
if (png_ptr->buffer_size < num_to_check) if (png_ptr->buffer_size < num_to_check)
@ -564,76 +540,6 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
} }
void /* PRIVATE */
png_push_crc_skip(png_structp 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_structp png_ptr)
{
if (png_ptr->skip_length && png_ptr->save_buffer_size)
{
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 && png_ptr->current_buffer_size)
{
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)
{
if (png_ptr->buffer_size < 4)
{
png_push_save_buffer(png_ptr);
return;
}
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)
{ {
@ -897,6 +803,12 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
*/ */
ret = inflate(&png_ptr->zstream, Z_SYNC_FLUSH); ret = inflate(&png_ptr->zstream, Z_SYNC_FLUSH);
/* Hack, added in 1.5.18: the progressive reader does not reset
* png_ptr->zstream, so any attempt to use it after the last IDAT fails
* (silently). This allows the read code to do the reset when required.
*/
png_ptr->flags |= PNG_FLAG_ZSTREAM_PROGRESSIVE;
/* Check for any failure before proceeding. */ /* Check for any failure before proceeding. */
if (ret != Z_OK && ret != Z_STREAM_END) if (ret != Z_OK && ret != Z_STREAM_END)
{ {
@ -1285,7 +1197,7 @@ png_progressive_combine_row (png_structp png_ptr, png_bytep old_row,
* it must be png_ptr->row_buf+1 * it must be png_ptr->row_buf+1
*/ */
if (new_row != NULL) if (new_row != NULL)
png_combine_row(png_ptr, old_row, 1/*display*/); png_combine_row(png_ptr, old_row, 1/*blocky display*/);
} }
#endif /* PNG_READ_INTERLACING_SUPPORTED */ #endif /* PNG_READ_INTERLACING_SUPPORTED */

248
3rdparty/libpng/pngpriv.h vendored
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 1.5.26 [December 17, 2015]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2015 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 1.5.10 [March 29, 2012]
*
* 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
@ -39,6 +37,7 @@
*/ */
#define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */ #define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */
#ifndef PNG_VERSION_INFO_ONLY
/* This is required for the definition of abort(), used as a last ditch /* This is required for the definition of abort(), used as a last ditch
* error handler when all else fails. * error handler when all else fails.
*/ */
@ -46,6 +45,7 @@
/* This is used to find 'offsetof', used below for alignment tests. */ /* This is used to find 'offsetof', used below for alignment tests. */
#include <stddef.h> #include <stddef.h>
#endif /* !PNG_VERSION_INFO_ONLY */
#define PNGLIB_BUILD /*libpng is being built, not used*/ #define PNGLIB_BUILD /*libpng is being built, not used*/
@ -125,14 +125,59 @@
#endif #endif
#include "png.h" #include "png.h"
#include "pnginfo.h"
#include "pngstruct.h"
/* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */ /* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */
#ifndef PNG_DLL_EXPORT #ifndef PNG_DLL_EXPORT
# define PNG_DLL_EXPORT # define PNG_DLL_EXPORT
#endif #endif
/* Compile time options.
* =====================
* In a multi-arch build the compiler may compile the code several times for the
* same object module, producing different binaries for different architectures.
* When this happens configure-time setting of the target host options cannot be
* done and this interferes with the handling of the ARM NEON optimizations, and
* possibly other similar optimizations. Put additional tests here; in general
* this is needed when the same option can be changed at both compile time and
* run time depending on the target OS (i.e. iOS vs Android.)
*
* NOTE: symbol prefixing does not pass $(CFLAGS) to the preprocessor, because
* this is not possible with certain compilers (Oracle SUN OS CC), as a result
* it is necessary to ensure that all extern functions that *might* be used
* regardless of $(CFLAGS) get declared in this file. The test on __ARM_NEON__
* below is one example of this behavior because it is controlled by the
* presence or not of -mfpu=neon on the GCC command line, it is possible to do
* this in $(CC), e.g. "CC=gcc -mfpu=neon", but people who build libpng rarely
* do this.
*/
#ifndef PNG_ARM_NEON_OPT
/* ARM NEON optimizations are being controlled by the compiler settings,
* typically the target FPU. If the FPU has been set to NEON (-mfpu=neon
* with GCC) then the compiler will define __ARM_NEON__ and we can rely
* unconditionally on NEON instructions not crashing, otherwise we must
* disable use of NEON instructions.
*
* NOTE: at present these optimizations depend on 'ALIGNED_MEMORY', so they
* can only be turned on automatically if that is supported too. If
* PNG_ARM_NEON_OPT is set in CPPFLAGS (to >0) then arm/arm_init.c will fail
* to compile with an appropriate #error if ALIGNED_MEMORY has been turned
* off.
*/
# if defined(__ARM_NEON__) && defined(PNG_ALIGNED_MEMORY_SUPPORTED)
# define PNG_ARM_NEON_OPT 2
# else
# define PNG_ARM_NEON_OPT 0
# endif
#endif
#if PNG_ARM_NEON_OPT > 0
/* NEON optimizations are to be at least considered by libpng, so enable the
* callbacks to do this.
*/
# define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_neon
#endif
/* SECURITY and SAFETY: /* SECURITY and SAFETY:
* *
* By default libpng is built without any internal limits on image size, * By default libpng is built without any internal limits on image size,
@ -143,44 +188,6 @@
* real system capabilities. * real system capabilities.
*/ */
#ifdef PNG_SAFE_LIMITS_SUPPORTED
/* 'safe' limits */
# 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
/* This is used for 16 bit gamma tables - only the top level pointers are const,
* this could be changed:
*/
typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
/* Added at libpng-1.2.9 */
/* Moved to pngpriv.h at libpng-1.5.0 */
/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure" /* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure"
* script. We may need it here to get the correct configuration on things * script. We may need it here to get the correct configuration on things
* like limits. * like limits.
@ -191,9 +198,11 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
# endif # 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
@ -211,6 +220,11 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
# define PNG_MAX_MALLOC_64K # define PNG_MAX_MALLOC_64K
#endif #endif
/* Moved to pngpriv.h at libpng-1.5.0 */
/* NOTE: some of these may have been used in external applications as
* these definitions were exposed in pngconf.h prior to 1.5.
*/
#ifndef PNG_UNUSED #ifndef PNG_UNUSED
/* Unused formal parameter warnings are silenced using the following macro /* Unused formal parameter warnings are silenced using the following macro
* which is expected to have no bad effects on performance (optimizing * which is expected to have no bad effects on performance (optimizing
@ -246,7 +260,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
/* Modern compilers support restrict, but assume not for anything not /* Modern compilers support restrict, but assume not for anything not
* recognized here: * recognized here:
*/ */
# if defined __GNUC__ || defined _MSC_VER || defined __WATCOMC__ # if defined(__GNUC__) || defined(_MSC_VER) || defined(__WATCOMC__)
# define PNG_RESTRICT restrict # define PNG_RESTRICT restrict
# else # else
# define PNG_RESTRICT # define PNG_RESTRICT
@ -260,8 +274,6 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
#ifdef PNG_WARNINGS_SUPPORTED #ifdef PNG_WARNINGS_SUPPORTED
# define PNG_WARNING_PARAMETERS(p) png_warning_parameters p; # define PNG_WARNING_PARAMETERS(p) png_warning_parameters p;
#else #else
# define png_warning(s1,s2) ((void)(s1))
# define png_chunk_warning(s1,s2) ((void)(s1))
# define png_warning_parameter(p,number,string) ((void)0) # define png_warning_parameter(p,number,string) ((void)0)
# define png_warning_parameter_unsigned(p,number,format,value) ((void)0) # define png_warning_parameter_unsigned(p,number,format,value) ((void)0)
# define png_warning_parameter_signed(p,number,format,value) ((void)0) # define png_warning_parameter_signed(p,number,format,value) ((void)0)
@ -269,8 +281,6 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
# define PNG_WARNING_PARAMETERS(p) # define PNG_WARNING_PARAMETERS(p)
#endif #endif
#ifndef PNG_ERROR_TEXT_SUPPORTED #ifndef PNG_ERROR_TEXT_SUPPORTED
# define png_error(s1,s2) png_err(s1)
# define png_chunk_error(s1,s2) png_err(s1)
# define png_fixed_error(s1,s2) png_err(s1) # define png_fixed_error(s1,s2) png_err(s1)
#endif #endif
@ -308,6 +318,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
# define PNGFAPI /* PRIVATE */ # define PNGFAPI /* PRIVATE */
#endif #endif
#ifndef PNG_VERSION_INFO_ONLY
/* Other defines specific to compilers can go here. Try to keep /* Other defines specific to compilers can go here. Try to keep
* them inside an appropriate ifdef/endif pair for portability. * them inside an appropriate ifdef/endif pair for portability.
*/ */
@ -352,6 +363,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
defined(_WIN32) || defined(__WIN32__) defined(_WIN32) || defined(__WIN32__)
# include <windows.h> /* defines _WINDOWS_ macro */ # include <windows.h> /* defines _WINDOWS_ macro */
#endif #endif
#endif /* !PNG_VERSION_INFO_ONLY */
/* Moved here around 1.5.0beta36 from pngconf.h */ /* Moved here around 1.5.0beta36 from pngconf.h */
/* Users may want to use these so they are not private. Any library /* Users may want to use these so they are not private. Any library
@ -360,7 +372,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
/* Memory model/platform independent fns */ /* Memory model/platform independent fns */
#ifndef PNG_ABORT #ifndef PNG_ABORT
# if defined(_WINDOWS_) && !defined(HAVE_WINRT) # ifdef _WINDOWS_
# define PNG_ABORT() ExitProcess(0) # define PNG_ABORT() ExitProcess(0)
# else # else
# define PNG_ABORT() abort() # define PNG_ABORT() abort()
@ -378,12 +390,12 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
# define png_memcpy _fmemcpy # define png_memcpy _fmemcpy
# define png_memset _fmemset # define png_memset _fmemset
#else #else
# if defined(_WINDOWS_) && !defined(HAVE_WINRT) /* Favor Windows over C runtime fns */ # ifdef _WINDOWS_ /* Favor Windows over C runtime fns */
# define CVT_PTR(ptr) (ptr) # define CVT_PTR(ptr) (ptr)
# define CVT_PTR_NOCHECK(ptr) (ptr) # define CVT_PTR_NOCHECK(ptr) (ptr)
# define png_strlen lstrlenA # define png_strlen lstrlenA
# define png_memcmp memcmp # define png_memcmp memcmp
# define png_memcpy CopyMemory # define png_memcpy memcpy
# define png_memset memset # define png_memset memset
# else # else
# define CVT_PTR(ptr) (ptr) # define CVT_PTR(ptr) (ptr)
@ -416,7 +428,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
#if PNG_ALIGN_TYPE == PNG_ALIGN_SIZE #if PNG_ALIGN_TYPE == PNG_ALIGN_SIZE
/* This is used because in some compiler implementations non-aligned /* This is used because in some compiler implementations non-aligned
* structure members are supported, so the offsetof approach below fails. * structure members are supported, so the offsetof approach below fails.
* Set PNG_ALIGN_TO_SIZE=0 for compiler combinations where unaligned access * Set PNG_ALIGN_SIZE=0 for compiler combinations where unaligned access
* is good for performance. Do not do this unless you have tested the result * is good for performance. Do not do this unless you have tested the result
* and understand it. * and understand it.
*/ */
@ -505,10 +517,6 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
#define PNG_STRUCT_PNG 0x0001 #define PNG_STRUCT_PNG 0x0001
#define PNG_STRUCT_INFO 0x0002 #define PNG_STRUCT_INFO 0x0002
/* Scaling factor for filter heuristic weighting calculations */
#define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT))
#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT))
/* Flags for the png_ptr->flags rather than declaring a byte for each one */ /* Flags for the png_ptr->flags rather than declaring a byte for each one */
#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 #define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001
#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 #define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002
@ -531,7 +539,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000 #define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000
#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000 #define PNG_FLAG_STRIP_ERROR_TEXT 0x80000
#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000 #define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000
/* 0x200000 unused */ #define PNG_FLAG_ZSTREAM_PROGRESSIVE 0x200000
/* 0x400000 unused */ /* 0x400000 unused */
#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000 /* Added to libpng-1.4.0 */ #define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000 /* Added to libpng-1.4.0 */
#define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000 /* 5 lines added */ #define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000 /* 5 lines added */
@ -617,8 +625,10 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
#define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\ #define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\
((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0)) ((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0))
#else #else
#ifndef PNG_VERSION_INFO_ONLY
PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp, PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp,
png_const_charp text)); png_const_charp text));
#endif /* !PNG_VERSION_INFO_ONLY */
#endif #endif
#endif #endif
@ -692,6 +702,18 @@ PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp,
#define PNG_GAMMA_MAC_INVERSE 65909 #define PNG_GAMMA_MAC_INVERSE 65909
#define PNG_GAMMA_sRGB_INVERSE 45455 #define PNG_GAMMA_sRGB_INVERSE 45455
/* Almost everything below is C specific; the #defines above can be used in
* non-C code (so long as it is C-preprocessed) the rest of this stuff cannot.
*/
#ifndef PNG_VERSION_INFO_ONLY
#include "pngstruct.h"
#include "pnginfo.h"
/* This is used for 16 bit gamma tables -- only the top level pointers are
* const; this could be changed:
*/
typedef const png_uint_16p * png_const_uint_16pp;
/* Inhibit C++ name-mangling for libpng functions but not for system calls. */ /* Inhibit C++ name-mangling for libpng functions but not for system calls. */
#ifdef __cplusplus #ifdef __cplusplus
@ -823,10 +845,8 @@ PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr));
# ifdef PNG_FLOATING_POINT_SUPPORTED # ifdef PNG_FLOATING_POINT_SUPPORTED
PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma));
# endif # endif
# ifdef PNG_FIXED_POINT_SUPPORTED
PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr,
png_fixed_point file_gamma)); png_fixed_point file_gamma));
# endif
#endif #endif
#ifdef PNG_WRITE_sBIT_SUPPORTED #ifdef PNG_WRITE_sBIT_SUPPORTED
@ -881,13 +901,6 @@ PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr,
png_const_uint_16p hist, int num_hist)); png_const_uint_16p hist, int num_hist));
#endif #endif
/* Chunks that have keywords */
#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr,
png_const_charp key, png_charpp new_key));
#endif
#ifdef PNG_WRITE_tEXt_SUPPORTED #ifdef PNG_WRITE_tEXt_SUPPORTED
PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key, PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key,
png_const_charp text, png_size_t text_len)); png_const_charp text, png_size_t text_len));
@ -993,8 +1006,8 @@ PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info,
/* Unfilter a row: check the filter value before calling this, there is no point /* Unfilter a row: check the filter value before calling this, there is no point
* calling it for PNG_FILTER_VALUE_NONE. * calling it for PNG_FILTER_VALUE_NONE.
*/ */
PNG_EXTERN void png_read_filter_row PNGARG((png_structp pp, png_row_infop row_info, PNG_EXTERN void png_read_filter_row PNGARG((png_structp pp, png_row_infop
png_bytep row, png_const_bytep prev_row, int filter)); row_info, png_bytep row, png_const_bytep prev_row, int filter));
PNG_EXTERN void png_read_filter_row_up_neon PNGARG((png_row_infop row_info, PNG_EXTERN void png_read_filter_row_up_neon PNGARG((png_row_infop row_info,
png_bytep row, png_const_bytep prev_row)); png_bytep row, png_const_bytep prev_row));
@ -1293,9 +1306,6 @@ PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr,
PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr,
png_infop info_ptr)); png_infop info_ptr));
PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr));
PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr,
png_uint_32 length));
PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr));
PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr));
PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr,
png_bytep buffer, png_size_t buffer_length)); png_bytep buffer, png_size_t buffer_length));
@ -1491,14 +1501,16 @@ PNG_EXTERN void png_formatted_warning(png_structp png_ptr,
/* ASCII to FP interfaces, currently only implemented if sCAL /* ASCII to FP interfaces, currently only implemented if sCAL
* support is required. * support is required.
*/ */
#if defined(PNG_READ_sCAL_SUPPORTED) #ifdef PNG_sCAL_SUPPORTED
/* MAX_DIGITS is actually the maximum number of characters in an sCAL /* MAX_DIGITS is actually the maximum number of characters in an sCAL
* width or height, derived from the precision (number of significant * width or height, derived from the precision (number of significant
* digits - a build time settable option) and assumpitions about the * digits - a build time settable option) and assumpitions about the
* maximum ridiculous exponent. * maximum ridiculous exponent.
*/ */
#define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/) #define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/)
#endif
#ifdef PNG_sCAL_SUPPORTED
#ifdef PNG_FLOATING_POINT_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED
PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii, PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii,
png_size_t size, double fp, unsigned int precision)); png_size_t size, double fp, unsigned int precision));
@ -1583,14 +1595,14 @@ PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr,
#define PNG_FP_IS_POSITIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_Z_MASK) #define PNG_FP_IS_POSITIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_Z_MASK)
#define PNG_FP_IS_NEGATIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_NZ_MASK) #define PNG_FP_IS_NEGATIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_NZ_MASK)
/* The actual parser. This can be called repeatedly, it updates /* The actual parser. This can be called repeatedly. It updates
* the index into the string and the state variable (which must * the index into the string and the state variable (which must
* be initialzed to 0). It returns a result code, as above. There * be initialized to 0). It returns a result code, as above. There
* is no point calling the parser any more if it fails to advance to * is no point calling the parser any more if it fails to advance to
* the end of the string - it is stuck on an invalid character (or * the end of the string - it is stuck on an invalid character (or
* terminated by '\0'). * terminated by '\0').
* *
* Note that the pointer will consume an E or even an E+ then leave * Note that the pointer will consume an E or even an E+ and then leave
* a 'maybe' state even though a preceding integer.fraction is valid. * a 'maybe' state even though a preceding integer.fraction is valid.
* The PNG_FP_WAS_VALID flag indicates that a preceding substring was * The PNG_FP_WAS_VALID flag indicates that a preceding substring was
* a valid number. It's possible to recover from this by calling * a valid number. It's possible to recover from this by calling
@ -1629,7 +1641,7 @@ PNG_EXTERN png_fixed_point png_muldiv_warn PNGARG((png_structp png_ptr,
png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by)); png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by));
#endif #endif
#ifdef PNG_READ_GAMMA_SUPPORTED #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_cHRM_SUPPORTED)
/* Calculate a reciprocal - used for gamma values. This returns /* Calculate a reciprocal - used for gamma values. This returns
* 0 if the argument is 0 in order to maintain an undefined value, * 0 if the argument is 0 in order to maintain an undefined value,
* there are no warnings. * there are no warnings.
@ -1664,7 +1676,80 @@ PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr,
int bit_depth)); int bit_depth));
#endif #endif
/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ /* Missing declarations if FIXED_POINT is *not* supported - fixed properly
* in libpng 1.6
*/
#ifndef PNG_FIXED_POINT_SUPPORTED
#ifdef PNG_cHRM_SUPPORTED
PNG_EXTERN png_uint_32 png_get_cHRM_XYZ_fixed PNGARG(
(png_structp png_ptr, png_const_infop info_ptr,
png_fixed_point *int_red_X, png_fixed_point *int_red_Y,
png_fixed_point *int_red_Z, png_fixed_point *int_green_X,
png_fixed_point *int_green_Y, png_fixed_point *int_green_Z,
png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y,
png_fixed_point *int_blue_Z));
PNG_EXTERN void png_set_cHRM_XYZ_fixed PNGARG((png_structp png_ptr,
png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y,
png_fixed_point int_red_Z, png_fixed_point int_green_X,
png_fixed_point int_green_Y, png_fixed_point int_green_Z,
png_fixed_point int_blue_X, png_fixed_point int_blue_Y,
png_fixed_point int_blue_Z));
PNG_EXTERN void png_set_cHRM_fixed PNGARG((png_structp png_ptr,
png_infop info_ptr, png_fixed_point int_white_x,
png_fixed_point int_white_y, png_fixed_point int_red_x,
png_fixed_point int_red_y, png_fixed_point int_green_x,
png_fixed_point int_green_y, png_fixed_point int_blue_x,
png_fixed_point int_blue_y));
#endif
#ifdef PNG_gAMA_SUPPORTED
PNG_EXTERN png_uint_32 png_get_gAMA_fixed PNGARG(
(png_const_structp png_ptr, png_const_infop info_ptr,
png_fixed_point *int_file_gamma));
PNG_EXTERN void png_set_gAMA_fixed PNGARG((png_structp png_ptr,
png_infop info_ptr, png_fixed_point int_file_gamma));
#endif
#ifdef PNG_READ_BACKGROUND_SUPPORTED
PNG_EXTERN void png_set_background_fixed PNGARG((png_structp png_ptr,
png_const_color_16p background_color, int background_gamma_code,
int need_expand, png_fixed_point background_gamma));
#endif
#ifdef PNG_READ_ALPHA_MODE_SUPPORTED
PNG_EXTERN void png_set_alpha_mode_fixed PNGARG((png_structp png_ptr,
int mode, png_fixed_point output_gamma));
#endif
#ifdef PNG_READ_GAMMA_SUPPORTED
PNG_EXTERN void png_set_gamma_fixed PNGARG((png_structp png_ptr,
png_fixed_point screen_gamma, png_fixed_point override_file_gamma));
#endif
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
PNG_EXTERN void png_set_rgb_to_gray_fixed PNGARG((png_structp png_ptr,
int error_action, png_fixed_point red, png_fixed_point green));
#endif
#endif /* FIX MISSING !FIXED_POINT DECLARATIONS */
/* These are initialization functions for hardware specific PNG filter
* optimizations; list these here then select the appropriate one at compile
* time using the macro PNG_FILTER_OPTIMIZATIONS. If the macro is not defined
* the generic code is used.
*/
#ifdef PNG_FILTER_OPTIMIZATIONS
PNG_EXTERN void PNG_FILTER_OPTIMIZATIONS(png_structp png_ptr, unsigned int bpp);
/* Just declare the optimization that will be used */
#else
/* List *all* the possible optimizations here - this branch is required if
* the builder of libpng passes the definition of PNG_FILTER_OPTIMIZATIONS in
* CFLAGS in place of CPPFLAGS *and* uses symbol prefixing.
*/
PNG_EXTERN void png_init_filter_functions_neon(png_structp png_ptr,
unsigned int bpp);
#endif
/* Maintainer: Put new private prototypes here ^ */
#include "pngdebug.h" #include "pngdebug.h"
@ -1672,4 +1757,5 @@ PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr,
} }
#endif #endif
#endif /* PNG_VERSION_INFO_ONLY */
#endif /* PNGPRIV_H */ #endif /* PNGPRIV_H */

25
3rdparty/libpng/pngread.c vendored
View File

@ -1,8 +1,8 @@
/* pngread.c - read a PNG file /* pngread.c - read a PNG file
* *
* Last changed in libpng 1.5.10 [March 8, 2012] * Last changed in libpng 1.5.23 [July 23, 2015]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2015 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.)
* *
@ -100,7 +100,7 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
if (!png_user_version_check(png_ptr, user_png_ver)) if (!png_user_version_check(png_ptr, user_png_ver))
png_cleanup_needed = 1; png_cleanup_needed = 1;
if (!png_cleanup_needed) if (png_cleanup_needed == 0)
{ {
/* Initialize zbuf - compression buffer */ /* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE; png_ptr->zbuf_size = PNG_ZBUF_SIZE;
@ -114,7 +114,7 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
png_ptr->zstream.zfree = png_zfree; png_ptr->zstream.zfree = png_zfree;
png_ptr->zstream.opaque = (voidpf)png_ptr; png_ptr->zstream.opaque = (voidpf)png_ptr;
if (!png_cleanup_needed) if (png_cleanup_needed == 0)
{ {
switch (inflateInit(&png_ptr->zstream)) switch (inflateInit(&png_ptr->zstream))
{ {
@ -141,7 +141,7 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
} }
} }
if (png_cleanup_needed) if (png_cleanup_needed != 0)
{ {
/* Clean up PNG structure and deallocate any memory. */ /* Clean up PNG structure and deallocate any memory. */
png_free(png_ptr, png_ptr->zbuf); png_free(png_ptr, png_ptr->zbuf);
@ -1119,8 +1119,7 @@ png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn)
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
#ifdef PNG_INFO_IMAGE_SUPPORTED #ifdef PNG_INFO_IMAGE_SUPPORTED
void PNGAPI void PNGAPI
png_read_png(png_structp png_ptr, png_infop info_ptr, png_read_png(png_structp png_ptr, png_infop info_ptr, int transforms,
int transforms,
voidp params) voidp params)
{ {
int row; int row;
@ -1191,7 +1190,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
if (transforms & PNG_TRANSFORM_EXPAND) if (transforms & PNG_TRANSFORM_EXPAND)
if ((png_ptr->bit_depth < 8) || if ((png_ptr->bit_depth < 8) ||
(png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) || (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
(png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))) (info_ptr->valid & PNG_INFO_tRNS))
png_set_expand(png_ptr); png_set_expand(png_ptr);
#endif #endif
@ -1210,14 +1209,8 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
* [0,65535] to the original [0,7] or [0,31], or whatever range the * [0,65535] to the original [0,7] or [0,31], or whatever range the
* colors were originally in: * colors were originally in:
*/ */
if ((transforms & PNG_TRANSFORM_SHIFT) if ((transforms & PNG_TRANSFORM_SHIFT) && (info_ptr->valid & PNG_INFO_sBIT))
&& png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT)) png_set_shift(png_ptr, &info_ptr->sig_bit);
{
png_color_8p sig_bit;
png_get_sBIT(png_ptr, info_ptr, &sig_bit);
png_set_shift(png_ptr, sig_bit);
}
#endif #endif
#ifdef PNG_READ_BGR_SUPPORTED #ifdef PNG_READ_BGR_SUPPORTED

4
3rdparty/libpng/pngrio.c vendored
View File

@ -2,7 +2,7 @@
/* pngrio.c - functions for data input /* pngrio.c - functions for data input
* *
* Last changed in libpng 1.5.0 [January 6, 2011] * Last changed in libpng 1.5.0 [January 6, 2011]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2011 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_structp png_ptr, png_bytep data, png_size_t length) png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)

210
3rdparty/libpng/pngrtran.c vendored
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 1.5.11 [June 14, 2012] * Last changed in libpng 1.5.24 [November 12, 2015]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2015 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.)
* *
@ -114,7 +114,7 @@ png_set_background_fixed(png_structp png_ptr,
png_sizeof(png_color_16)); png_sizeof(png_color_16));
png_ptr->background_gamma = background_gamma; png_ptr->background_gamma = background_gamma;
png_ptr->background_gamma_type = (png_byte)(background_gamma_code); png_ptr->background_gamma_type = (png_byte)(background_gamma_code);
if (need_expand) if (need_expand != 0)
png_ptr->transformations |= PNG_BACKGROUND_EXPAND; png_ptr->transformations |= PNG_BACKGROUND_EXPAND;
else else
png_ptr->transformations &= ~PNG_BACKGROUND_EXPAND; png_ptr->transformations &= ~PNG_BACKGROUND_EXPAND;
@ -194,8 +194,10 @@ translate_gamma_flags(png_structp png_ptr, png_fixed_point output_gamma,
*/ */
# ifdef PNG_READ_sRGB_SUPPORTED # ifdef PNG_READ_sRGB_SUPPORTED
png_ptr->flags |= PNG_FLAG_ASSUME_sRGB; png_ptr->flags |= PNG_FLAG_ASSUME_sRGB;
# else
PNG_UNUSED(png_ptr)
# endif # endif
if (is_screen) if (is_screen != 0)
output_gamma = PNG_GAMMA_sRGB; output_gamma = PNG_GAMMA_sRGB;
else else
output_gamma = PNG_GAMMA_sRGB_INVERSE; output_gamma = PNG_GAMMA_sRGB_INVERSE;
@ -204,7 +206,7 @@ translate_gamma_flags(png_structp png_ptr, png_fixed_point output_gamma,
else if (output_gamma == PNG_GAMMA_MAC_18 || else if (output_gamma == PNG_GAMMA_MAC_18 ||
output_gamma == PNG_FP_1 / PNG_GAMMA_MAC_18) output_gamma == PNG_FP_1 / PNG_GAMMA_MAC_18)
{ {
if (is_screen) if (is_screen != 0)
output_gamma = PNG_GAMMA_MAC_OLD; output_gamma = PNG_GAMMA_MAC_OLD;
else else
output_gamma = PNG_GAMMA_MAC_INVERSE; output_gamma = PNG_GAMMA_MAC_INVERSE;
@ -329,7 +331,7 @@ png_set_alpha_mode_fixed(png_structp png_ptr, int mode,
/* Finally, if pre-multiplying, set the background fields to achieve the /* Finally, if pre-multiplying, set the background fields to achieve the
* desired result. * desired result.
*/ */
if (compose) if (compose != 0)
{ {
/* And obtain alpha pre-multiplication by composing on black: */ /* And obtain alpha pre-multiplication by composing on black: */
png_memset(&png_ptr->background, 0, sizeof png_ptr->background); png_memset(&png_ptr->background, 0, sizeof png_ptr->background);
@ -389,7 +391,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette,
png_ptr->transformations |= PNG_QUANTIZE; png_ptr->transformations |= PNG_QUANTIZE;
if (!full_quantize) if (full_quantize == 0)
{ {
int i; int i;
@ -444,12 +446,12 @@ png_set_quantize(png_structp png_ptr, png_colorp palette,
} }
} }
if (done) if (done != 0)
break; break;
} }
/* Swap the palette around, and set up a table, if necessary */ /* Swap the palette around, and set up a table, if necessary */
if (full_quantize) if (full_quantize != 0)
{ {
int j = num_palette; int j = num_palette;
@ -632,7 +634,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette,
num_new_palette--; num_new_palette--;
palette[png_ptr->index_to_palette[j]] palette[png_ptr->index_to_palette[j]]
= palette[num_new_palette]; = palette[num_new_palette];
if (!full_quantize) if (full_quantize == 0)
{ {
int k; int k;
@ -700,7 +702,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette,
} }
png_ptr->num_palette = (png_uint_16)num_palette; png_ptr->num_palette = (png_uint_16)num_palette;
if (full_quantize) if (full_quantize != 0)
{ {
int i; int i;
png_bytep distance; png_bytep distance;
@ -969,7 +971,7 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
png_uint_16 red_int, green_int; png_uint_16 red_int, green_int;
/* NOTE: this calculation does not round, but this behavior is retained /* NOTE: this calculation does not round, but this behavior is retained
* for consistency, the inaccuracy is very small. The code here always * for consistency; the inaccuracy is very small. The code here always
* overwrites the coefficients, regardless of whether they have been * overwrites the coefficients, regardless of whether they have been
* defaulted or set already. * defaulted or set already.
*/ */
@ -1068,7 +1070,7 @@ png_gamma_threshold(png_fixed_point screen_gamma, png_fixed_point file_gamma)
* the palette. * the palette.
*/ */
/*For the moment 'png_init_palette_transformations' and /* For the moment 'png_init_palette_transformations' and
* 'png_init_rgb_transformations' only do some flag canceling optimizations. * 'png_init_rgb_transformations' only do some flag canceling optimizations.
* The intent is that these two routines should have palette or rgb operations * The intent is that these two routines should have palette or rgb operations
* extracted from 'png_init_read_transformations'. * extracted from 'png_init_read_transformations'.
@ -1093,25 +1095,31 @@ png_init_palette_transformations(png_structp png_ptr)
/* Ignore if all the entries are opaque (unlikely!) */ /* Ignore if all the entries are opaque (unlikely!) */
for (i=0; i<png_ptr->num_trans; ++i) for (i=0; i<png_ptr->num_trans; ++i)
{
if (png_ptr->trans_alpha[i] == 255) if (png_ptr->trans_alpha[i] == 255)
continue; continue;
else if (png_ptr->trans_alpha[i] == 0) else if (png_ptr->trans_alpha[i] == 0)
input_has_transparency = 1; input_has_transparency = 1;
else else
{
input_has_transparency = 1;
input_has_alpha = 1; input_has_alpha = 1;
break;
}
}
} }
/* If no alpha we can optimize. */ /* If no alpha we can optimize. */
if (!input_has_alpha) if (input_has_alpha == 0)
{ {
/* Any alpha means background and associative alpha processing is /* Any alpha means background and associative alpha processing is
* required, however if the alpha is 0 or 1 throughout OPTIIMIZE_ALPHA * required, however if the alpha is 0 or 1 throughout OPTIMIZE_ALPHA
* and ENCODE_ALPHA are irrelevant. * and ENCODE_ALPHA are irrelevant.
*/ */
png_ptr->transformations &= ~PNG_ENCODE_ALPHA; png_ptr->transformations &= ~PNG_ENCODE_ALPHA;
png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA;
if (!input_has_transparency) if (input_has_transparency == 0)
png_ptr->transformations &= ~(PNG_COMPOSE | PNG_BACKGROUND_EXPAND); png_ptr->transformations &= ~(PNG_COMPOSE | PNG_BACKGROUND_EXPAND);
} }
@ -1167,10 +1175,10 @@ png_init_rgb_transformations(png_structp png_ptr)
int input_has_transparency = png_ptr->num_trans > 0; int input_has_transparency = png_ptr->num_trans > 0;
/* If no alpha we can optimize. */ /* If no alpha we can optimize. */
if (!input_has_alpha) if (input_has_alpha == 0)
{ {
/* Any alpha means background and associative alpha processing is /* Any alpha means background and associative alpha processing is
* required, however if the alpha is 0 or 1 throughout OPTIIMIZE_ALPHA * required, however if the alpha is 0 or 1 throughout OPTIMIZE_ALPHA
* and ENCODE_ALPHA are irrelevant. * and ENCODE_ALPHA are irrelevant.
*/ */
# ifdef PNG_READ_ALPHA_MODE_SUPPORTED # ifdef PNG_READ_ALPHA_MODE_SUPPORTED
@ -1178,7 +1186,7 @@ png_init_rgb_transformations(png_structp png_ptr)
png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA;
# endif # endif
if (!input_has_transparency) if (input_has_transparency == 0)
png_ptr->transformations &= ~(PNG_COMPOSE | PNG_BACKGROUND_EXPAND); png_ptr->transformations &= ~(PNG_COMPOSE | PNG_BACKGROUND_EXPAND);
} }
@ -1221,7 +1229,7 @@ png_init_rgb_transformations(png_structp png_ptr)
default: default:
case 8: case 8:
/* Already 8 bits, fall through */ /* FALL THROUGH (already 8 bits) */
case 16: case 16:
/* Already a full 16 bits */ /* Already a full 16 bits */
@ -1304,7 +1312,7 @@ png_init_read_transformations(png_structp png_ptr)
* the code immediately below if the transform can be handled outside the * the code immediately below if the transform can be handled outside the
* row loop. * row loop.
*/ */
if (gamma_correction) if (gamma_correction != 0)
png_ptr->transformations |= PNG_GAMMA; png_ptr->transformations |= PNG_GAMMA;
else else
@ -1313,7 +1321,7 @@ png_init_read_transformations(png_structp png_ptr)
#endif #endif
/* Certain transformations have the effect of preventing other /* Certain transformations have the effect of preventing other
* transformations that happen afterward in png_do_read_transformations, * transformations that happen afterward in png_do_read_transformations;
* resolve the interdependencies here. From the code of * resolve the interdependencies here. From the code of
* png_do_read_transformations the order is: * png_do_read_transformations the order is:
* *
@ -1702,11 +1710,11 @@ png_init_read_transformations(png_structp png_ptr)
g_sig = png_gamma_significant(g); g_sig = png_gamma_significant(g);
gs_sig = png_gamma_significant(gs); gs_sig = png_gamma_significant(gs);
if (g_sig) if (g_sig != 0)
png_ptr->background_1.gray = png_gamma_correct(png_ptr, png_ptr->background_1.gray = png_gamma_correct(png_ptr,
png_ptr->background.gray, g); png_ptr->background.gray, g);
if (gs_sig) if (gs_sig != 0)
png_ptr->background.gray = png_gamma_correct(png_ptr, png_ptr->background.gray = png_gamma_correct(png_ptr,
png_ptr->background.gray, gs); png_ptr->background.gray, gs);
@ -1715,7 +1723,7 @@ png_init_read_transformations(png_structp png_ptr)
(png_ptr->background.red != png_ptr->background.gray)) (png_ptr->background.red != png_ptr->background.gray))
{ {
/* RGB or RGBA with color background */ /* RGB or RGBA with color background */
if (g_sig) if (g_sig != 0)
{ {
png_ptr->background_1.red = png_gamma_correct(png_ptr, png_ptr->background_1.red = png_gamma_correct(png_ptr,
png_ptr->background.red, g); png_ptr->background.red, g);
@ -1727,7 +1735,7 @@ png_init_read_transformations(png_structp png_ptr)
png_ptr->background.blue, g); png_ptr->background.blue, g);
} }
if (gs_sig) if (gs_sig != 0)
{ {
png_ptr->background.red = png_gamma_correct(png_ptr, png_ptr->background.red = png_gamma_correct(png_ptr,
png_ptr->background.red, gs); png_ptr->background.red, gs);
@ -1898,6 +1906,9 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->bit_depth = 8; info_ptr->bit_depth = 8;
info_ptr->num_trans = 0; info_ptr->num_trans = 0;
if (png_ptr->palette == NULL)
png_error (png_ptr, "Palette is NULL in indexed image");
} }
else else
{ {
@ -2045,10 +2056,10 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
defined(PNG_READ_USER_TRANSFORM_SUPPORTED) defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
if (png_ptr->transformations & PNG_USER_TRANSFORM) if (png_ptr->transformations & PNG_USER_TRANSFORM)
{ {
if (info_ptr->bit_depth < png_ptr->user_transform_depth) if (png_ptr->user_transform_depth)
info_ptr->bit_depth = png_ptr->user_transform_depth; info_ptr->bit_depth = png_ptr->user_transform_depth;
if (info_ptr->channels < png_ptr->user_transform_channels) if (png_ptr->user_transform_channels)
info_ptr->channels = png_ptr->user_transform_channels; info_ptr->channels = png_ptr->user_transform_channels;
} }
#endif #endif
@ -2067,7 +2078,7 @@ defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
png_ptr->info_rowbytes = info_ptr->rowbytes; png_ptr->info_rowbytes = info_ptr->rowbytes;
#ifndef PNG_READ_EXPAND_SUPPORTED #ifndef PNG_READ_EXPAND_SUPPORTED
if (png_ptr) if (png_ptr != NULL)
return; return;
#endif #endif
} }
@ -2144,7 +2155,7 @@ png_do_read_transformations(png_structp png_ptr, png_row_infop row_info)
png_do_rgb_to_gray(png_ptr, row_info, png_do_rgb_to_gray(png_ptr, row_info,
png_ptr->row_buf + 1); png_ptr->row_buf + 1);
if (rgb_error) if (rgb_error != 0)
{ {
png_ptr->rgb_to_gray_status=1; png_ptr->rgb_to_gray_status=1;
if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == if ((png_ptr->transformations & PNG_RGB_TO_GRAY) ==
@ -2198,8 +2209,8 @@ png_do_read_transformations(png_structp png_ptr, png_row_infop row_info)
png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1);
#endif #endif
#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\ #if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
(defined PNG_READ_ALPHA_MODE_SUPPORTED) defined(PNG_READ_ALPHA_MODE_SUPPORTED)
if (png_ptr->transformations & PNG_COMPOSE) if (png_ptr->transformations & PNG_COMPOSE)
png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr); png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr);
#endif #endif
@ -2210,8 +2221,8 @@ png_do_read_transformations(png_structp png_ptr, png_row_infop row_info)
/* Because RGB_TO_GRAY does the gamma transform. */ /* Because RGB_TO_GRAY does the gamma transform. */
!(png_ptr->transformations & PNG_RGB_TO_GRAY) && !(png_ptr->transformations & PNG_RGB_TO_GRAY) &&
#endif #endif
#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\ #if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
(defined PNG_READ_ALPHA_MODE_SUPPORTED) defined(PNG_READ_ALPHA_MODE_SUPPORTED)
/* 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.)
*/ */
@ -2522,7 +2533,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row,
have_shift = 1; have_shift = 1;
} }
if (!have_shift) if (have_shift == 0)
return; return;
} }
@ -2958,13 +2969,13 @@ 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;
@ -2979,8 +2990,8 @@ 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;
@ -3039,8 +3050,8 @@ 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);
@ -3048,8 +3059,8 @@ 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;
@ -3068,8 +3079,8 @@ 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;
@ -3283,7 +3294,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
*(dp++) = red; *(dp++) = red;
} }
if (have_alpha) if (have_alpha != 0)
*(dp++) = *(sp++); *(dp++) = *(sp++);
} }
} }
@ -3312,7 +3323,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
else else
*(dp++) = red; *(dp++) = red;
if (have_alpha) if (have_alpha != 0)
*(dp++) = *(sp++); *(dp++) = *(sp++);
} }
} }
@ -3330,11 +3341,17 @@ png_do_rgb_to_gray(png_structp 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;
#if 0 /* Coverity doesn't like this */
red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
#else
png_byte hi,lo;
hi=*(sp)++; lo=*(sp)++; red = (png_uint_16)((hi << 8) | (lo));
hi=*(sp)++; lo=*(sp)++; green = (png_uint_16)((hi << 8) | (lo));
hi=*(sp)++; lo=*(sp)++; blue = (png_uint_16)((hi << 8) | (lo));
#endif
if (red == green && red == blue) if (red == green && red == blue)
{ {
if (png_ptr->gamma_16_table != NULL) if (png_ptr->gamma_16_table != NULL)
@ -3364,7 +3381,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
*(dp++) = (png_byte)((w>>8) & 0xff); *(dp++) = (png_byte)((w>>8) & 0xff);
*(dp++) = (png_byte)(w & 0xff); *(dp++) = (png_byte)(w & 0xff);
if (have_alpha) if (have_alpha != 0)
{ {
*(dp++) = *(sp++); *(dp++) = *(sp++);
*(dp++) = *(sp++); *(dp++) = *(sp++);
@ -3398,7 +3415,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
*(dp++) = (png_byte)((gray16>>8) & 0xff); *(dp++) = (png_byte)((gray16>>8) & 0xff);
*(dp++) = (png_byte)(gray16 & 0xff); *(dp++) = (png_byte)(gray16 & 0xff);
if (have_alpha) if (have_alpha != 0)
{ {
*(dp++) = *(sp++); *(dp++) = *(sp++);
*(dp++) = *(sp++); *(dp++) = *(sp++);
@ -3477,8 +3494,8 @@ png_build_grayscale_palette(int bit_depth, png_colorp palette)
#ifdef PNG_READ_TRANSFORMS_SUPPORTED #ifdef PNG_READ_TRANSFORMS_SUPPORTED
#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\ #if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
(defined PNG_READ_ALPHA_MODE_SUPPORTED) defined(PNG_READ_ALPHA_MODE_SUPPORTED)
/* Replace any alpha or transparency with the supplied background color. /* Replace any alpha or transparency with the supplied background color.
* "background" is already in the screen gamma, while "background_1" is * "background" is already in the screen gamma, while "background_1" is
* at a gamma of 1.0. Paletted files have already been taken care of. * at a gamma of 1.0. Paletted files have already been taken care of.
@ -3524,7 +3541,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp |= (png_byte)(png_ptr->background.gray << shift); *sp |= (png_byte)(png_ptr->background.gray << shift);
} }
if (!shift) if (shift == 0)
{ {
shift = 7; shift = 7;
sp++; sp++;
@ -3561,7 +3578,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp |= (png_byte)(g << shift); *sp |= (png_byte)(g << shift);
} }
if (!shift) if (shift == 0)
{ {
shift = 6; shift = 6;
sp++; sp++;
@ -3586,7 +3603,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp |= (png_byte)(png_ptr->background.gray << shift); *sp |= (png_byte)(png_ptr->background.gray << shift);
} }
if (!shift) if (shift == 0)
{ {
shift = 6; shift = 6;
sp++; sp++;
@ -3624,7 +3641,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp |= (png_byte)(g << shift); *sp |= (png_byte)(g << shift);
} }
if (!shift) if (shift == 0)
{ {
shift = 4; shift = 4;
sp++; sp++;
@ -3649,7 +3666,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp |= (png_byte)(png_ptr->background.gray << shift); *sp |= (png_byte)(png_ptr->background.gray << shift);
} }
if (!shift) if (shift == 0)
{ {
shift = 4; shift = 4;
sp++; sp++;
@ -3705,8 +3722,10 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
if (v == png_ptr->trans_color.gray) if (v == png_ptr->trans_color.gray)
{ {
/* Background is already in screen gamma */ /* Background is already in screen gamma */
*sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); *sp = (png_byte)((png_ptr->background.gray >> 8)
*(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.gray
& 0xff);
} }
else else
@ -3729,8 +3748,10 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
if (v == png_ptr->trans_color.gray) if (v == png_ptr->trans_color.gray)
{ {
*sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); *sp = (png_byte)((png_ptr->background.gray >> 8)
*(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.gray
& 0xff);
} }
} }
} }
@ -3810,9 +3831,12 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
/* Background is already in screen gamma */ /* Background is already in screen gamma */
*sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff);
*(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); *(sp + 2) = (png_byte)((png_ptr->background.green >> 8)
*(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); & 0xff);
*(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); *(sp + 3) = (png_byte)(png_ptr->background.green
& 0xff);
*(sp + 4) = (png_byte)((png_ptr->background.blue >> 8)
& 0xff);
*(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff);
} }
@ -3853,9 +3877,12 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
{ {
*sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff);
*(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); *(sp + 2) = (png_byte)((png_ptr->background.green >> 8)
*(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); & 0xff);
*(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); *(sp + 3) = (png_byte)(png_ptr->background.green
& 0xff);
*(sp + 4) = (png_byte)((png_ptr->background.blue >> 8)
& 0xff);
*(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff);
} }
} }
@ -3892,7 +3919,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
v = gamma_to_1[*sp]; v = gamma_to_1[*sp];
png_composite(w, v, a, png_ptr->background_1.gray); png_composite(w, v, a, png_ptr->background_1.gray);
if (!optimize) if (optimize == 0)
w = gamma_from_1[w]; w = gamma_from_1[w];
*sp = w; *sp = w;
} }
@ -3910,7 +3937,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp = (png_byte)png_ptr->background.gray; *sp = (png_byte)png_ptr->background.gray;
else if (a < 0xff) else if (a < 0xff)
png_composite(*sp, *sp, a, png_ptr->background_1.gray); png_composite(*sp, *sp, a, png_ptr->background.gray);
} }
} }
} }
@ -3938,7 +3965,8 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
else if (a == 0) else if (a == 0)
{ {
/* Background is already in screen gamma */ /* Background is already in screen gamma */
*sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); *sp = (png_byte)((png_ptr->background.gray >> 8)
& 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff);
} }
@ -3948,7 +3976,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
g = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp]; g = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp];
png_composite_16(v, g, a, png_ptr->background_1.gray); png_composite_16(v, g, a, png_ptr->background_1.gray);
if (optimize) 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];
@ -3968,7 +3996,8 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
if (a == 0) if (a == 0)
{ {
*sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); *sp = (png_byte)((png_ptr->background.gray >> 8)
& 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff);
} }
@ -3977,7 +4006,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
png_uint_16 g, v; png_uint_16 g, v;
g = (png_uint_16)(((*sp) << 8) + *(sp + 1)); g = (png_uint_16)(((*sp) << 8) + *(sp + 1));
png_composite_16(v, g, a, png_ptr->background_1.gray); png_composite_16(v, g, a, png_ptr->background.gray);
*sp = (png_byte)((v >> 8) & 0xff); *sp = (png_byte)((v >> 8) & 0xff);
*(sp + 1) = (png_byte)(v & 0xff); *(sp + 1) = (png_byte)(v & 0xff);
} }
@ -4021,17 +4050,17 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
v = gamma_to_1[*sp]; v = gamma_to_1[*sp];
png_composite(w, v, a, png_ptr->background_1.red); png_composite(w, v, a, png_ptr->background_1.red);
if (!optimize) w = gamma_from_1[w]; if (optimize == 0) w = gamma_from_1[w];
*sp = w; *sp = w;
v = gamma_to_1[*(sp + 1)]; v = gamma_to_1[*(sp + 1)];
png_composite(w, v, a, png_ptr->background_1.green); png_composite(w, v, a, png_ptr->background_1.green);
if (!optimize) w = gamma_from_1[w]; if (optimize == 0) w = gamma_from_1[w];
*(sp + 1) = w; *(sp + 1) = w;
v = gamma_to_1[*(sp + 2)]; v = gamma_to_1[*(sp + 2)];
png_composite(w, v, a, png_ptr->background_1.blue); png_composite(w, v, a, png_ptr->background_1.blue);
if (!optimize) w = gamma_from_1[w]; if (optimize == 0) w = gamma_from_1[w];
*(sp + 2) = w; *(sp + 2) = w;
} }
} }
@ -4098,9 +4127,12 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
/* Background is already in screen gamma */ /* Background is already in screen gamma */
*sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff);
*(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); *(sp + 2) = (png_byte)((png_ptr->background.green >> 8)
*(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); & 0xff);
*(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); *(sp + 3) = (png_byte)(png_ptr->background.green
& 0xff);
*(sp + 4) = (png_byte)((png_ptr->background.blue >> 8)
& 0xff);
*(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff);
} }
@ -4110,23 +4142,26 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp 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) if (optimize == 0)
w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; w = gamma_16_from_1[((w&0xff) >> gamma_shift)]
[w >> 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);
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) if (optimize == 0)
w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; w = gamma_16_from_1[((w&0xff) >> gamma_shift)]
[w >> 8];
*(sp + 2) = (png_byte)((w >> 8) & 0xff); *(sp + 2) = (png_byte)((w >> 8) & 0xff);
*(sp + 3) = (png_byte)(w & 0xff); *(sp + 3) = (png_byte)(w & 0xff);
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) if (optimize == 0)
w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; w = gamma_16_from_1[((w&0xff) >> gamma_shift)]
[w >> 8];
*(sp + 4) = (png_byte)((w >> 8) & 0xff); *(sp + 4) = (png_byte)((w >> 8) & 0xff);
*(sp + 5) = (png_byte)(w & 0xff); *(sp + 5) = (png_byte)(w & 0xff);
@ -4147,9 +4182,12 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
{ {
*sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff);
*(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); *(sp + 2) = (png_byte)((png_ptr->background.green >> 8)
*(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); & 0xff);
*(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); *(sp + 3) = (png_byte)(png_ptr->background.green
& 0xff);
*(sp + 4) = (png_byte)((png_ptr->background.blue >> 8)
& 0xff);
*(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff);
} }
@ -4725,7 +4763,9 @@ png_do_expand(png_row_infop row_info, png_bytep row,
{ {
if (row_info->bit_depth == 8) if (row_info->bit_depth == 8)
{ {
gray = gray & 0xff; /* NOTE: prior to libpng 1.5.14 this cleared out the top bits of
* 'gray', however if those are set it is an error.
*/
sp = row + (png_size_t)row_width - 1; sp = row + (png_size_t)row_width - 1;
dp = row + (png_size_t)(row_width << 1) - 1; dp = row + (png_size_t)(row_width << 1) - 1;

186
3rdparty/libpng/pngrutil.c vendored
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 1.5.10 [March 8, 2012] * Last changed in libpng 1.5.25 [December 3, 2015]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2015 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.)
* *
@ -18,8 +18,6 @@
#ifdef PNG_READ_SUPPORTED #ifdef PNG_READ_SUPPORTED
#define png_strtod(p,a,b) strtod(a,b)
png_uint_32 PNGAPI png_uint_32 PNGAPI
png_get_uint_31(png_structp png_ptr, png_const_bytep buf) png_get_uint_31(png_structp png_ptr, png_const_bytep buf)
{ {
@ -91,7 +89,13 @@ png_get_int_32)(png_const_bytep buf)
return uval; return uval;
uval = (uval ^ 0xffffffff) + 1; /* 2's complement: -x = ~x+1 */ uval = (uval ^ 0xffffffff) + 1; /* 2's complement: -x = ~x+1 */
if ((uval & 0x80000000) == 0) /* no overflow */
return -(png_int_32)uval; return -(png_int_32)uval;
/* The following has to be safe; this function only gets called on PNG data
* and if we get here that data is invalid. 0 is the most safe value and
* if not then an attacker would surely just generate a PNG with 0 instead.
*/
return 0;
} }
/* Grab an unsigned 16-bit integer from a buffer in big-endian format. */ /* Grab an unsigned 16-bit integer from a buffer in big-endian format. */
@ -211,7 +215,7 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip)
png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
} }
if (i) if (i != 0)
{ {
png_crc_read(png_ptr, png_ptr->zbuf, i); png_crc_read(png_ptr, png_ptr->zbuf, i);
} }
@ -267,7 +271,7 @@ png_crc_error(png_structp png_ptr)
/* The chunk CRC must be serialized in a single I/O call. */ /* The chunk CRC must be serialized in a single I/O call. */
png_read_data(png_ptr, crc_bytes, 4); png_read_data(png_ptr, crc_bytes, 4);
if (need_crc) if (need_crc != 0)
{ {
crc = png_get_uint_32(crc_bytes); crc = png_get_uint_32(crc_bytes);
return ((int)(crc != png_ptr->crc)); return ((int)(crc != png_ptr->crc));
@ -284,6 +288,17 @@ png_inflate(png_structp png_ptr, png_bytep data, png_size_t size,
{ {
png_size_t count = 0; png_size_t count = 0;
/* HACK: added in libpng 1.5.18: the progressive reader always leaves
* png_ptr->zstream in a non-reset state. This causes a reset if it needs to
* be used again. This only copes with that one specific error; see libpng
* 1.6 for a better solution.
*/
if ((png_ptr->flags & PNG_FLAG_ZSTREAM_PROGRESSIVE) != 0)
{
(void)inflateReset(&png_ptr->zstream);
png_ptr->flags &= ~PNG_FLAG_ZSTREAM_PROGRESSIVE;
}
/* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't /* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't
* even necessarily handle 65536 bytes) because the type uInt is "16 bits or * even necessarily handle 65536 bytes) because the type uInt is "16 bits or
* more". Consequently it is necessary to chunk the input to zlib. This * more". Consequently it is necessary to chunk the input to zlib. This
@ -596,7 +611,7 @@ void /* PRIVATE */
png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{ {
png_color palette[PNG_MAX_PALETTE_LENGTH]; png_color palette[PNG_MAX_PALETTE_LENGTH];
int num, i; int max_palette_length, num, i;
#ifdef PNG_POINTER_INDEXING_SUPPORTED #ifdef PNG_POINTER_INDEXING_SUPPORTED
png_colorp pal_ptr; png_colorp pal_ptr;
#endif #endif
@ -649,8 +664,22 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
} }
} }
/* The cast is safe because 'length' is less than 3*PNG_MAX_PALETTE_LENGTH */
num = (int)length / 3; num = (int)length / 3;
/* If the palette has 256 or fewer entries but is too large for the bit
* depth, we don't issue an error, to preserve the behavior of previous
* libpng versions. We silently truncate the unused extra palette entries
* here.
*/
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
max_palette_length = (1 << png_ptr->bit_depth);
else
max_palette_length = PNG_MAX_PALETTE_LENGTH;
if (num > max_palette_length)
num = max_palette_length;
#ifdef PNG_POINTER_INDEXING_SUPPORTED #ifdef PNG_POINTER_INDEXING_SUPPORTED
for (i = 0, pal_ptr = palette; i < num; i++, pal_ptr++) for (i = 0, pal_ptr = palette; i < num; i++, pal_ptr++)
{ {
@ -683,7 +712,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
#endif #endif
{ {
png_crc_finish(png_ptr, 0); png_crc_finish(png_ptr, (int) length - num * 3);
} }
#ifndef PNG_READ_OPT_PLTE_SUPPORTED #ifndef PNG_READ_OPT_PLTE_SUPPORTED
@ -1298,7 +1327,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* There should be at least one zero (the compression type byte) /* There should be at least one zero (the compression type byte)
* following the separator, and we should be on it * following the separator, and we should be on it
*/ */
if (profile >= png_ptr->chunkdata + slength - 1) if (slength < 1U || profile >= png_ptr->chunkdata + slength - 1U)
{ {
png_free(png_ptr, png_ptr->chunkdata); png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL; png_ptr->chunkdata = NULL;
@ -1309,7 +1338,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* Compression_type should always be zero */ /* Compression_type should always be zero */
compression_type = *profile++; compression_type = *profile++;
if (compression_type) if (compression_type != 0)
{ {
png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk"); png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk");
compression_type = 0x00; /* Reset it to zero (libpng-1.0.6 through 1.0.8 compression_type = 0x00; /* Reset it to zero (libpng-1.0.6 through 1.0.8
@ -1447,7 +1476,8 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
++entry_start; ++entry_start;
/* A sample depth should follow the separator, and we should be on it */ /* A sample depth should follow the separator, and we should be on it */
if (entry_start > (png_bytep)png_ptr->chunkdata + slength - 2) if (slength < 2U ||
entry_start > (png_bytep)png_ptr->chunkdata + slength - 2U)
{ {
png_free(png_ptr, png_ptr->chunkdata); png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL; png_ptr->chunkdata = NULL;
@ -1976,7 +2006,7 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* We need to have at least 12 bytes after the purpose string /* We need to have at least 12 bytes after the purpose string
* in order to get the parameter information. * in order to get the parameter information.
*/ */
if (endptr <= buf + 12) if (endptr - buf <= 12)
{ {
png_warning(png_ptr, "Invalid pCAL data"); png_warning(png_ptr, "Invalid pCAL data");
png_free(png_ptr, png_ptr->chunkdata); png_free(png_ptr, png_ptr->chunkdata);
@ -2309,7 +2339,7 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_ptr->chunkdata = NULL; png_ptr->chunkdata = NULL;
png_free(png_ptr, text_ptr); png_free(png_ptr, text_ptr);
if (ret) if (ret != 0)
png_warning(png_ptr, "Insufficient memory to process text chunk"); png_warning(png_ptr, "Insufficient memory to process text chunk");
} }
#endif #endif
@ -2388,7 +2418,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* Empty loop */ ; /* Empty loop */ ;
/* zTXt must have some text after the chunkdataword */ /* zTXt must have some text after the chunkdataword */
if (text >= png_ptr->chunkdata + slength - 2) if (slength < 2U || text >= png_ptr->chunkdata + slength - 2U)
{ {
png_warning(png_ptr, "Truncated zTXt chunk"); png_warning(png_ptr, "Truncated zTXt chunk");
png_free(png_ptr, png_ptr->chunkdata); png_free(png_ptr, png_ptr->chunkdata);
@ -2439,7 +2469,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_free(png_ptr, png_ptr->chunkdata); png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL; png_ptr->chunkdata = NULL;
if (ret) if (ret != 0)
png_error(png_ptr, "Insufficient memory to store zTXt chunk"); png_error(png_ptr, "Insufficient memory to store zTXt chunk");
} }
#endif #endif
@ -2452,7 +2482,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_textp text_ptr; png_textp text_ptr;
png_charp key, lang, text, lang_key; png_charp key, lang, text, lang_key;
int comp_flag; int comp_flag;
int comp_type = 0; int comp_type;
int ret; int ret;
png_size_t slength, prefix_len, data_len; png_size_t slength, prefix_len, data_len;
@ -2525,7 +2555,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
* keyword * keyword
*/ */
if (lang >= png_ptr->chunkdata + slength - 3) if (slength < 3U || lang >= png_ptr->chunkdata + slength - 3U)
{ {
png_warning(png_ptr, "Truncated iTXt chunk"); png_warning(png_ptr, "Truncated iTXt chunk");
png_free(png_ptr, png_ptr->chunkdata); png_free(png_ptr, png_ptr->chunkdata);
@ -2533,20 +2563,32 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return; return;
} }
else
{
comp_flag = *lang++; comp_flag = *lang++;
comp_type = *lang++; comp_type = *lang++;
}
if (comp_type || (comp_flag && comp_flag != PNG_TEXT_COMPRESSION_zTXt)) /* 1.5.14: The spec says "for uncompressed text decoders shall ignore [the
* compression type]". The compression flag shall be 0 (no compression) or
* 1 (compressed with method 0 - deflate.)
*/
if (comp_flag/*compressed*/ != 0)
{ {
png_warning(png_ptr, "Unknown iTXt compression type or method"); if (comp_flag != 1)
{
png_warning(png_ptr, "invalid iTXt compression flag");
png_free(png_ptr, png_ptr->chunkdata); png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL; png_ptr->chunkdata = NULL;
return; return;
} }
if (comp_type != 0)
{
png_warning(png_ptr, "unknown iTXt compression type");
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
return;
}
}
for (lang_key = lang; *lang_key; lang_key++) for (lang_key = lang; *lang_key; lang_key++)
/* Empty loop */ ; /* Empty loop */ ;
@ -2577,7 +2619,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
key=png_ptr->chunkdata; key=png_ptr->chunkdata;
if (comp_flag) if (comp_flag/*compressed*/)
png_decompress_chunk(png_ptr, comp_type, png_decompress_chunk(png_ptr, comp_type,
(size_t)length, prefix_len, &data_len); (size_t)length, prefix_len, &data_len);
@ -2595,7 +2637,8 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return; return;
} }
text_ptr->compression = (int)comp_flag + 1; text_ptr->compression =
(comp_flag ? PNG_ITXT_COMPRESSION_zTXt : PNG_ITXT_COMPRESSION_NONE);
text_ptr->lang_key = png_ptr->chunkdata + (lang_key - key); text_ptr->lang_key = png_ptr->chunkdata + (lang_key - key);
text_ptr->lang = png_ptr->chunkdata + (lang - key); text_ptr->lang = png_ptr->chunkdata + (lang - key);
text_ptr->itxt_length = data_len; text_ptr->itxt_length = data_len;
@ -2609,7 +2652,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_free(png_ptr, png_ptr->chunkdata); png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL; png_ptr->chunkdata = NULL;
if (ret) if (ret != 0)
png_error(png_ptr, "Insufficient memory to store iTXt chunk"); png_error(png_ptr, "Insufficient memory to store iTXt chunk");
} }
#endif #endif
@ -2786,7 +2829,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
{ {
unsigned int pixel_depth = png_ptr->transformed_pixel_depth; unsigned int pixel_depth = png_ptr->transformed_pixel_depth;
png_const_bytep sp = png_ptr->row_buf + 1; png_const_bytep sp = png_ptr->row_buf + 1;
png_uint_32 row_width = png_ptr->width; png_alloc_size_t row_width = png_ptr->width;
unsigned int pass = png_ptr->pass; unsigned int pass = png_ptr->pass;
png_bytep end_ptr = 0; png_bytep end_ptr = 0;
png_byte end_byte = 0; png_byte end_byte = 0;
@ -2938,7 +2981,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
# define S_MASKS(d,s) { S_MASK(0,d,s), S_MASK(1,d,s), S_MASK(2,d,s),\ # define S_MASKS(d,s) { S_MASK(0,d,s), S_MASK(1,d,s), S_MASK(2,d,s),\
S_MASK(3,d,s), S_MASK(4,d,s), S_MASK(5,d,s) } S_MASK(3,d,s), S_MASK(4,d,s), S_MASK(5,d,s) }
# define B_MASKS(d,s) { B_MASK(1,d,s), S_MASK(3,d,s), S_MASK(5,d,s) } # define B_MASKS(d,s) { B_MASK(1,d,s), B_MASK(3,d,s), B_MASK(5,d,s) }
# define DEPTH_INDEX(d) ((d)==1?0:((d)==2?1:2)) # define DEPTH_INDEX(d) ((d)==1?0:((d)==2?1:2))
@ -3049,7 +3092,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
} }
/* Work out the bytes to copy. */ /* Work out the bytes to copy. */
if (display) if (display != 0)
{ {
/* When doing the 'block' algorithm the pixel in the pass gets /* When doing the 'block' algorithm the pixel in the pass gets
* replicated to adjacent pixels. This is why the even (0,2,4,6) * replicated to adjacent pixels. This is why the even (0,2,4,6)
@ -3059,7 +3102,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
/* But don't allow this number to exceed the actual row width. */ /* But don't allow this number to exceed the actual row width. */
if (bytes_to_copy > row_width) if (bytes_to_copy > row_width)
bytes_to_copy = row_width; bytes_to_copy = (unsigned int)/*SAFE*/row_width;
} }
else /* normal row; Adam7 only ever gives us one pixel to copy. */ else /* normal row; Adam7 only ever gives us one pixel to copy. */
@ -3151,7 +3194,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
{ {
png_uint_32p dp32 = (png_uint_32p)dp; png_uint_32p dp32 = (png_uint_32p)dp;
png_const_uint_32p sp32 = (png_const_uint_32p)sp; png_const_uint_32p sp32 = (png_const_uint_32p)sp;
unsigned int skip = (bytes_to_jump-bytes_to_copy) / size_t skip = (bytes_to_jump-bytes_to_copy) /
sizeof (png_uint_32); sizeof (png_uint_32);
do do
@ -3192,7 +3235,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
{ {
png_uint_16p dp16 = (png_uint_16p)dp; png_uint_16p dp16 = (png_uint_16p)dp;
png_const_uint_16p sp16 = (png_const_uint_16p)sp; png_const_uint_16p sp16 = (png_const_uint_16p)sp;
unsigned int skip = (bytes_to_jump-bytes_to_copy) / size_t skip = (bytes_to_jump-bytes_to_copy) /
sizeof (png_uint_16); sizeof (png_uint_16);
do do
@ -3237,7 +3280,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
dp += bytes_to_jump; dp += bytes_to_jump;
row_width -= bytes_to_jump; row_width -= bytes_to_jump;
if (bytes_to_copy > row_width) if (bytes_to_copy > row_width)
bytes_to_copy = row_width; bytes_to_copy = (unsigned int)/*SAFE*/row_width;
} }
} }
@ -3476,7 +3519,7 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
for (i = 0; i < row_info->width; i++) for (i = 0; i < row_info->width; i++)
{ {
png_byte v[8]; png_byte v[8]; /* SAFE; pixel_depth does not exceed 64 */
int j; int j;
png_memcpy(v, sp, pixel_bytes); png_memcpy(v, sp, pixel_bytes);
@ -3660,66 +3703,6 @@ png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row,
} }
} }
#ifdef PNG_ARM_NEON
#if defined __linux__ && !defined __ANDROID__
#include <stdio.h>
#include <elf.h>
#include <asm/hwcap.h>
static int png_have_hwcap(unsigned cap)
{
FILE *f = fopen("/proc/self/auxv", "r");
Elf32_auxv_t aux;
int have_cap = 0;
if (!f)
return 0;
while (fread(&aux, sizeof(aux), 1, f) > 0)
{
if (aux.a_type == AT_HWCAP &&
aux.a_un.a_val & cap)
{
have_cap = 1;
break;
}
}
fclose(f);
return have_cap;
}
#endif /* __linux__ */
static void
png_init_filter_functions_neon(png_structp pp, unsigned int bpp)
{
#if defined __linux__ && !defined __ANDROID__
if (!png_have_hwcap(HWCAP_NEON))
return;
#endif
pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon;
if (bpp == 3)
{
pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_neon;
pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_neon;
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
png_read_filter_row_paeth3_neon;
}
else if (bpp == 4)
{
pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_neon;
pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_neon;
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
png_read_filter_row_paeth4_neon;
}
}
#endif /* PNG_ARM_NEON */
static void static void
png_init_filter_functions(png_structp pp) png_init_filter_functions(png_structp pp)
{ {
@ -3735,8 +3718,16 @@ png_init_filter_functions(png_structp pp)
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
png_read_filter_row_paeth_multibyte_pixel; png_read_filter_row_paeth_multibyte_pixel;
#ifdef PNG_ARM_NEON #ifdef PNG_FILTER_OPTIMIZATIONS
png_init_filter_functions_neon(pp, bpp); /* To use this define PNG_FILTER_OPTIMIZATIONS as the name of a function to
* call to install hardware optimizations for the above functions; simply
* replace whatever elements of the pp->read_filter[] array with a hardware
* specific (or, for that matter, generic) optimization.
*
* To see an example of this examine what configure.ac does when
* --enable-arm-neon is specified on the command line.
*/
PNG_FILTER_OPTIMIZATIONS(pp, bpp);
#endif #endif
} }
@ -3744,10 +3735,13 @@ void /* PRIVATE */
png_read_filter_row(png_structp pp, png_row_infop row_info, png_bytep row, png_read_filter_row(png_structp pp, png_row_infop row_info, png_bytep row,
png_const_bytep prev_row, int filter) png_const_bytep prev_row, int filter)
{ {
if (filter > PNG_FILTER_VALUE_NONE && filter < PNG_FILTER_VALUE_LAST)
{
if (pp->read_filter[0] == NULL) if (pp->read_filter[0] == NULL)
png_init_filter_functions(pp); png_init_filter_functions(pp);
if (filter > PNG_FILTER_VALUE_NONE && filter < PNG_FILTER_VALUE_LAST)
pp->read_filter[filter-1](row_info, row, prev_row); pp->read_filter[filter-1](row_info, row, prev_row);
}
} }
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED #ifdef PNG_SEQUENTIAL_READ_SUPPORTED

226
3rdparty/libpng/pngset.c vendored
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 1.5.11 [June 14, 2012] * Last changed in libpng 1.5.26 [December 17, 2015]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2015 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.)
* *
@ -20,6 +20,60 @@
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) ||\
defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
* and if invalid, correct the keyword rather than discarding the entire
* chunk. The PNG 1.0 specification requires keywords 1-79 characters in
* length, forbids leading or trailing whitespace, multiple internal spaces,
* and the non-break space (0x80) from ISO 8859-1. Returns keyword length.
*
* The 'new_key' buffer must be 80 characters in size (for the keyword plus a
* trailing '\0'). If this routine returns 0 then there was no keyword, or a
* valid one could not be generated, and the caller must handle the error by not
* setting the keyword.
*/
static png_uint_32
png_check_keyword(png_const_charp key, png_bytep new_key)
{
png_uint_32 key_len = 0;
int space = 1;
if (key == NULL)
{
*new_key = 0;
return 0;
}
while (*key && key_len < 79)
{
png_byte ch = (png_byte)*key++;
if ((ch > 32 && ch <= 126) || (ch >= 161 /*&& ch <= 255*/))
*new_key++ = ch, ++key_len, space = 0;
else if (space == 0)
{
/* A space or an invalid character when one wasn't seen immediately
* before; output just a space.
*/
*new_key++ = 32, ++key_len, space = 1;
}
}
if (key_len > 0 && space != 0) /* trailing space */
--key_len, --new_key;
/* Terminate the keyword */
*new_key = 0;
if (key_len == 0)
return 0;
return key_len;
}
#endif /* TEXT || pCAL || iCCP || sPLT */
#ifdef PNG_bKGD_SUPPORTED #ifdef PNG_bKGD_SUPPORTED
void PNGAPI void PNGAPI
png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_set_bKGD(png_structp png_ptr, png_infop info_ptr,
@ -123,12 +177,12 @@ png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X,
png_fixed(png_ptr, red_X, "cHRM Red X"), png_fixed(png_ptr, red_X, "cHRM Red X"),
png_fixed(png_ptr, red_Y, "cHRM Red Y"), png_fixed(png_ptr, red_Y, "cHRM Red Y"),
png_fixed(png_ptr, red_Z, "cHRM Red Z"), png_fixed(png_ptr, red_Z, "cHRM Red Z"),
png_fixed(png_ptr, green_X, "cHRM Red X"), png_fixed(png_ptr, green_X, "cHRM Green X"),
png_fixed(png_ptr, green_Y, "cHRM Red Y"), png_fixed(png_ptr, green_Y, "cHRM Green Y"),
png_fixed(png_ptr, green_Z, "cHRM Red Z"), png_fixed(png_ptr, green_Z, "cHRM Green Z"),
png_fixed(png_ptr, blue_X, "cHRM Red X"), png_fixed(png_ptr, blue_X, "cHRM Blue X"),
png_fixed(png_ptr, blue_Y, "cHRM Red Y"), png_fixed(png_ptr, blue_Y, "cHRM Blue Y"),
png_fixed(png_ptr, blue_Z, "cHRM Red Z")); png_fixed(png_ptr, blue_Z, "cHRM Blue Z"));
} }
# endif /* PNG_FLOATING_POINT_SUPPORTED */ # endif /* PNG_FLOATING_POINT_SUPPORTED */
@ -252,15 +306,6 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
/* Check for potential overflow */
if (width >
(PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */
- 48 /* bigrowbuf hack */
- 1 /* filter byte */
- 7*8 /* rounding of width to multiple of 8 pixels */
- 8) /* extra max_pixel_depth pad */
info_ptr->rowbytes = 0;
else
info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
} }
@ -287,6 +332,7 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
int nparams, png_const_charp units, png_charpp params) int nparams, png_const_charp units, png_charpp params)
{ {
png_byte new_purpose[80];
png_size_t length; png_size_t length;
int i; int i;
@ -295,7 +341,15 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL || info_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL)
return; return;
length = png_strlen(purpose) + 1; length = png_check_keyword(purpose, new_purpose);
if (length == 0)
{
png_warning(png_ptr, "pCAL: invalid purpose keyword");
return;
}
++length;
png_debug1(3, "allocating purpose for info (%lu bytes)", png_debug1(3, "allocating purpose for info (%lu bytes)",
(unsigned long)length); (unsigned long)length);
@ -318,7 +372,7 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
return; return;
} }
png_memcpy(info_ptr->pcal_purpose, purpose, length); png_memcpy(info_ptr->pcal_purpose, new_purpose, length);
png_debug(3, "storing X0, X1, type, and nparams in info"); png_debug(3, "storing X0, X1, type, and nparams in info");
info_ptr->pcal_X0 = X0; info_ptr->pcal_X0 = X0;
@ -517,12 +571,17 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
png_const_colorp palette, int num_palette) png_const_colorp palette, int num_palette)
{ {
png_uint_32 max_palette_length;
png_debug1(1, "in %s storage function", "PLTE"); png_debug1(1, "in %s storage function", "PLTE");
if (png_ptr == NULL || info_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL)
return; return;
if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH) max_palette_length = (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ?
(1 << info_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH;
if (num_palette < 0 || num_palette > (int) max_palette_length)
{ {
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
png_error(png_ptr, "Invalid palette length"); png_error(png_ptr, "Invalid palette length");
@ -541,8 +600,8 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
/* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
* of num_palette entries, in case of an invalid PNG file that has * of num_palette entries, in case of an invalid PNG file or incorrect
* too-large sample values. * call to png_set_PLTE() with too-large sample values.
*/ */
png_ptr->palette = (png_colorp)png_calloc(png_ptr, png_ptr->palette = (png_colorp)png_calloc(png_ptr,
PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
@ -618,6 +677,7 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
png_const_charp name, int compression_type, png_const_charp name, int compression_type,
png_const_bytep profile, png_uint_32 proflen) png_const_bytep profile, png_uint_32 proflen)
{ {
png_byte new_name[80];
png_charp new_iccp_name; png_charp new_iccp_name;
png_bytep new_iccp_profile; png_bytep new_iccp_profile;
png_size_t length; png_size_t length;
@ -627,7 +687,15 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
return; return;
length = png_strlen(name)+1; length = png_check_keyword(name, new_name);
if (length == 0)
{
png_warning(png_ptr, "iCCP: invalid keyword");
return;
}
++length;
new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length); new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
if (new_iccp_name == NULL) if (new_iccp_name == NULL)
@ -636,7 +704,7 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
return; return;
} }
png_memcpy(new_iccp_name, name, length); png_memcpy(new_iccp_name, new_name, length);
new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen); new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen);
if (new_iccp_profile == NULL) if (new_iccp_profile == NULL)
@ -671,7 +739,7 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr,
int ret; int ret;
ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
if (ret) if (ret != 0)
png_error(png_ptr, "Insufficient memory to store text"); png_error(png_ptr, "Insufficient memory to store text");
} }
@ -680,8 +748,9 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
png_const_textp text_ptr, int num_text) png_const_textp text_ptr, int num_text)
{ {
int i; int i;
size_t element_size;
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) if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
@ -690,6 +759,18 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
/* Make sure we have enough space in the "text" array in info_struct /* Make sure we have enough space in the "text" array in info_struct
* to hold all of the incoming text_ptr objects. * to hold all of the incoming text_ptr objects.
*/ */
element_size=png_sizeof(png_text);
if (num_text < 0 ||
num_text > INT_MAX - info_ptr->num_text - 8 ||
(unsigned int)/*SAFE*/(num_text +/*SAFE*/
info_ptr->num_text + 8) >=
PNG_SIZE_MAX/element_size)
{
png_warning(png_ptr, "too many text chunks");
return(0);
}
if (info_ptr->num_text + num_text > info_ptr->max_text) if (info_ptr->num_text + num_text > info_ptr->max_text)
{ {
int old_max_text = info_ptr->max_text; int old_max_text = info_ptr->max_text;
@ -739,6 +820,7 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
} }
for (i = 0; i < num_text; i++) for (i = 0; i < num_text; i++)
{ {
png_byte new_key[80], new_lang[80];
png_size_t text_length, key_len; png_size_t text_length, key_len;
png_size_t lang_len, lang_key_len; png_size_t lang_len, lang_key_len;
png_textp textp = &(info_ptr->text[info_ptr->num_text]); png_textp textp = &(info_ptr->text[info_ptr->num_text]);
@ -753,7 +835,13 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
continue; continue;
} }
key_len = png_strlen(text_ptr[i].key); key_len = png_check_keyword(text_ptr[i].key, new_key);
if (key_len == 0)
{
png_warning(png_ptr, "invalid text keyword");
continue;
}
if (text_ptr[i].compression <= 0) if (text_ptr[i].compression <= 0)
{ {
@ -766,8 +854,9 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
{ {
/* Set iTXt data */ /* Set iTXt data */
/* Zero length language is OK */
if (text_ptr[i].lang != NULL) if (text_ptr[i].lang != NULL)
lang_len = png_strlen(text_ptr[i].lang); lang_len = png_check_keyword(text_ptr[i].lang, new_lang);
else else
lang_len = 0; lang_len = 0;
@ -815,7 +904,7 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
(key_len + lang_len + lang_key_len + text_length + 4), (key_len + lang_len + lang_key_len + text_length + 4),
textp->key); textp->key);
png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len)); png_memcpy(textp->key, new_key, (png_size_t)(key_len));
*(textp->key + key_len) = '\0'; *(textp->key + key_len) = '\0';
if (text_ptr[i].compression > 0) if (text_ptr[i].compression > 0)
@ -836,7 +925,7 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
textp->text = textp->key + key_len + 1; textp->text = textp->key + key_len + 1;
} }
if (text_length) if (text_length != 0)
png_memcpy(textp->text, text_ptr[i].text, png_memcpy(textp->text, text_ptr[i].text,
(png_size_t)(text_length)); (png_size_t)(text_length));
@ -897,6 +986,12 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL || info_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL)
return; return;
if (num_trans < 0 || num_trans > PNG_MAX_PALETTE_LENGTH)
{
png_warning(png_ptr, "Ignoring invalid num_trans value");
return;
}
if (trans_alpha != NULL) if (trans_alpha != NULL)
{ {
/* It may not actually be necessary to set png_ptr->trans_alpha here; /* It may not actually be necessary to set png_ptr->trans_alpha here;
@ -916,16 +1011,19 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
if (trans_color != NULL) if (trans_color != NULL)
{ {
int sample_max = (1 << info_ptr->bit_depth); if (info_ptr->bit_depth < 16)
{
unsigned int sample_max = (1U << info_ptr->bit_depth) - 1U;
if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
(int)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 &&
((int)trans_color->red > sample_max || (trans_color->red > sample_max ||
(int)trans_color->green > sample_max || trans_color->green > sample_max ||
(int)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");
}
png_memcpy(&(info_ptr->trans_color), trans_color, png_memcpy(&(info_ptr->trans_color), trans_color,
png_sizeof(png_color_16)); png_sizeof(png_color_16));
@ -958,11 +1056,22 @@ png_set_sPLT(png_structp png_ptr,
*/ */
{ {
png_sPLT_tp np; png_sPLT_tp np;
int i; int i, j;
size_t element_size;
if (png_ptr == NULL || info_ptr == NULL) if (png_ptr == NULL || info_ptr == NULL)
return; return;
element_size = png_sizeof(png_sPLT_t);
if (nentries < 0 ||
nentries > INT_MAX-info_ptr->splt_palettes_num ||
(unsigned int)/*SAFE*/(nentries +/*SAFE*/
info_ptr->splt_palettes_num) >=
PNG_SIZE_MAX/element_size)
np=NULL;
else
np = (png_sPLT_tp)png_malloc_warn(png_ptr, np = (png_sPLT_tp)png_malloc_warn(png_ptr,
(info_ptr->splt_palettes_num + nentries) * (info_ptr->splt_palettes_num + nentries) *
(png_size_t)png_sizeof(png_sPLT_t)); (png_size_t)png_sizeof(png_sPLT_t));
@ -979,13 +1088,22 @@ png_set_sPLT(png_structp png_ptr,
png_free(png_ptr, info_ptr->splt_palettes); png_free(png_ptr, info_ptr->splt_palettes);
info_ptr->splt_palettes=NULL; info_ptr->splt_palettes=NULL;
for (i = 0; i < nentries; i++) for (i = j = 0; i < nentries; i++)
{ {
png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; png_sPLT_tp to = np + info_ptr->splt_palettes_num + j;
png_const_sPLT_tp from = entries + i; png_const_sPLT_tp from = entries + i;
png_byte new_name[80];
png_size_t length; png_size_t length;
length = png_strlen(from->name) + 1; length = png_check_keyword(from->name, new_name);
if (length == 0)
{
png_warning(png_ptr, "sPLT: invalid keyword");
continue;
}
++length; /* for trailing '\0' */
to->name = (png_charp)png_malloc_warn(png_ptr, length); to->name = (png_charp)png_malloc_warn(png_ptr, length);
if (to->name == NULL) if (to->name == NULL)
@ -995,7 +1113,7 @@ png_set_sPLT(png_structp png_ptr,
continue; continue;
} }
png_memcpy(to->name, from->name, length); png_memcpy(to->name, new_name, length);
to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
from->nentries * png_sizeof(png_sPLT_entry)); from->nentries * png_sizeof(png_sPLT_entry));
@ -1013,10 +1131,11 @@ png_set_sPLT(png_structp png_ptr,
to->nentries = from->nentries; to->nentries = from->nentries;
to->depth = from->depth; to->depth = from->depth;
++j;
} }
info_ptr->splt_palettes = np; info_ptr->splt_palettes = np;
info_ptr->splt_palettes_num += nentries; info_ptr->splt_palettes_num = j;
info_ptr->valid |= PNG_INFO_sPLT; info_ptr->valid |= PNG_INFO_sPLT;
info_ptr->free_me |= PNG_FREE_SPLT; info_ptr->free_me |= PNG_FREE_SPLT;
} }
@ -1029,10 +1148,20 @@ png_set_unknown_chunks(png_structp png_ptr,
{ {
png_unknown_chunkp np; png_unknown_chunkp np;
int i; int i;
size_t element_size;
if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
return; return;
element_size = png_sizeof(png_unknown_chunk);
if (num_unknowns < 0 ||
num_unknowns > INT_MAX-info_ptr->unknown_chunks_num ||
(unsigned int)/*SAFE*/(num_unknowns +/*SAFE*/
info_ptr->unknown_chunks_num) >=
PNG_SIZE_MAX/element_size)
np=NULL;
else
np = (png_unknown_chunkp)png_malloc_warn(png_ptr, np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
(png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) * (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) *
png_sizeof(png_unknown_chunk)); png_sizeof(png_unknown_chunk));
@ -1198,11 +1327,12 @@ png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
info_ptr->row_pointers = row_pointers; info_ptr->row_pointers = row_pointers;
if (row_pointers) if (row_pointers != NULL)
info_ptr->valid |= PNG_INFO_IDAT; info_ptr->valid |= PNG_INFO_IDAT;
} }
#endif #endif
#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
void PNGAPI void PNGAPI
png_set_compression_buffer_size(png_structp png_ptr, png_size_t size) png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)
{ {
@ -1230,6 +1360,7 @@ png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)
png_ptr->zstream.avail_out = 0; png_ptr->zstream.avail_out = 0;
png_ptr->zstream.avail_in = 0; png_ptr->zstream.avail_in = 0;
} }
#endif /* WRITE_CUSTOMIZE_COMPRESSION */
void PNGAPI void PNGAPI
png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
@ -1248,7 +1379,7 @@ png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
{ {
/* Images with dimensions larger than these limits will be /* Images with dimensions larger than these limits will be
* rejected by png_set_IHDR(). To accept any PNG datastream * rejected by png_set_IHDR(). To accept any PNG datastream
* regardless of dimensions, set both limits to 0x7ffffffL. * regardless of dimensions, set both limits to 0x7fffffffL.
*/ */
if (png_ptr == NULL) if (png_ptr == NULL)
return; return;
@ -1262,7 +1393,7 @@ void PNGAPI
png_set_chunk_cache_max (png_structp png_ptr, png_set_chunk_cache_max (png_structp png_ptr,
png_uint_32 user_chunk_cache_max) png_uint_32 user_chunk_cache_max)
{ {
if (png_ptr) if (png_ptr != NULL)
png_ptr->user_chunk_cache_max = user_chunk_cache_max; png_ptr->user_chunk_cache_max = user_chunk_cache_max;
} }
@ -1271,7 +1402,7 @@ void PNGAPI
png_set_chunk_malloc_max (png_structp png_ptr, png_set_chunk_malloc_max (png_structp png_ptr,
png_alloc_size_t user_chunk_malloc_max) png_alloc_size_t user_chunk_malloc_max)
{ {
if (png_ptr) if (png_ptr != NULL)
png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
} }
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
@ -1283,7 +1414,7 @@ png_set_benign_errors(png_structp png_ptr, int allowed)
{ {
png_debug(1, "in png_set_benign_errors"); png_debug(1, "in png_set_benign_errors");
if (allowed) if (allowed != 0)
png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
else else
@ -1300,12 +1431,11 @@ png_set_check_for_invalid_index(png_structp png_ptr, int allowed)
{ {
png_debug(1, "in png_set_check_for_invalid_index"); png_debug(1, "in png_set_check_for_invalid_index");
if (allowed) if (allowed != 0)
png_ptr->num_palette_max = 0; png_ptr->num_palette_max = 0;
else else
png_ptr->num_palette_max = -1; png_ptr->num_palette_max = -1;
} }
#endif #endif
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

21
3rdparty/libpng/pngstruct.h vendored
View File

@ -1,12 +1,11 @@
/* pngstruct.h - header file for PNG reference library /* pngstruct.h - header file for PNG reference library
* *
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Last changed in libpng 1.5.23 [July 23, 2015]
* Copyright (c) 1998-2002,2004,2006-2015 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 1.5.9 [February 18, 2012]
*
* 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
@ -237,16 +236,6 @@ struct png_struct_def
png_uint_16p hist; /* histogram */ png_uint_16p hist; /* histogram */
#endif #endif
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
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
#ifdef PNG_TIME_RFC1123_SUPPORTED #ifdef PNG_TIME_RFC1123_SUPPORTED
/* This is going to be unused in libpng16 and removed from libpng17 */ /* This is going to be unused in libpng16 and removed from libpng17 */
char time_buffer[29]; /* String to hold RFC 1123 time text */ char time_buffer[29]; /* String to hold RFC 1123 time text */
@ -352,7 +341,13 @@ struct png_struct_def
/* New member added in libpng-1.5.6 */ /* New member added in libpng-1.5.6 */
png_bytep big_prev_row; png_bytep big_prev_row;
/* New member added in libpng-1.5.7 */
void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info, void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info,
png_bytep row, png_const_bytep prev_row); png_bytep row, png_const_bytep prev_row);
/* Options */
#ifdef PNG_SET_OPTION_SUPPORTED
png_byte options; /* On/off state (up to 4 options) */
#endif
}; };
#endif /* PNGSTRUCT_H */ #endif /* PNGSTRUCT_H */

12
3rdparty/libpng/pngtrans.c vendored
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 1.5.11 [June 14, 2012] * Last changed in libpng 1.5.19 [August 21, 2014]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2014 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.)
* *
@ -452,7 +452,7 @@ png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
{ {
if (row_info->bit_depth == 8) if (row_info->bit_depth == 8)
{ {
if (at_start) /* Skip initial filler */ if (at_start != 0) /* Skip initial filler */
++sp; ++sp;
else /* Skip initial channel and, for sp, the filler */ else /* Skip initial channel and, for sp, the filler */
sp += 2, ++dp; sp += 2, ++dp;
@ -466,7 +466,7 @@ png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
else if (row_info->bit_depth == 16) else if (row_info->bit_depth == 16)
{ {
if (at_start) /* Skip initial filler */ if (at_start != 0) /* Skip initial filler */
sp += 2; sp += 2;
else /* Skip initial channel and, for sp, the filler */ else /* Skip initial channel and, for sp, the filler */
sp += 4, dp += 2; sp += 4, dp += 2;
@ -492,7 +492,7 @@ png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
{ {
if (row_info->bit_depth == 8) if (row_info->bit_depth == 8)
{ {
if (at_start) /* Skip initial filler */ if (at_start != 0) /* Skip initial filler */
++sp; ++sp;
else /* Skip initial channels and, for sp, the filler */ else /* Skip initial channels and, for sp, the filler */
sp += 4, dp += 3; sp += 4, dp += 3;
@ -506,7 +506,7 @@ png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
else if (row_info->bit_depth == 16) else if (row_info->bit_depth == 16)
{ {
if (at_start) /* Skip initial filler */ if (at_start != 0) /* Skip initial filler */
sp += 2; sp += 2;
else /* Skip initial channels and, for sp, the filler */ else /* Skip initial channels and, for sp, the filler */
sp += 8, dp += 6; sp += 8, dp += 6;

6
3rdparty/libpng/pngwio.c vendored
View File

@ -1,8 +1,8 @@
/* pngwio.c - functions for data output /* pngwio.c - functions for data output
* *
* Last changed in libpng 1.5.0 [January 6, 2011] * Last changed in libpng 1.5.18 [February 6, 2014]
* Copyright (c) 1998-2011 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2014 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.)
* *
@ -207,6 +207,8 @@ png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
# else # else
png_ptr->output_flush_fn = output_flush_fn; png_ptr->output_flush_fn = output_flush_fn;
# endif # endif
#else
PNG_UNUSED(output_flush_fn)
#endif /* PNG_WRITE_FLUSH_SUPPORTED */ #endif /* PNG_WRITE_FLUSH_SUPPORTED */
/* It is an error to read while writing a png file */ /* It is an error to read while writing a png file */

308
3rdparty/libpng/pngwrite.c vendored
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 1.5.11 [June 14, 2012] * Last changed in libpng 1.5.23 [July 23, 2015]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2015 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.)
* *
@ -41,20 +41,22 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \ if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \
(png_ptr->mng_features_permitted)) (png_ptr->mng_features_permitted))
{ {
png_warning(png_ptr, "MNG features are not allowed in a PNG datastream"); png_warning(png_ptr,
"MNG features are not allowed in a PNG datastream");
png_ptr->mng_features_permitted = 0; 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->filter_type, info_ptr->compression_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.
*/ */
@ -223,11 +225,14 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->text[i].lang, info_ptr->text[i].lang,
info_ptr->text[i].lang_key, info_ptr->text[i].lang_key,
info_ptr->text[i].text); info_ptr->text[i].text);
/* Mark this chunk as written */
if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
else
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
#else #else
png_warning(png_ptr, "Unable to write international text"); png_warning(png_ptr, "Unable to write international text");
#endif #endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
} }
/* If we want a compressed text chunk */ /* If we want a compressed text chunk */
@ -238,11 +243,11 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
png_write_zTXt(png_ptr, info_ptr->text[i].key, png_write_zTXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0, info_ptr->text[i].text, 0,
info_ptr->text[i].compression); info_ptr->text[i].compression);
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
#else #else
png_warning(png_ptr, "Unable to write compressed text"); png_warning(png_ptr, "Unable to write compressed text");
#endif #endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
} }
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
@ -340,11 +345,11 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
info_ptr->text[i].lang, info_ptr->text[i].lang,
info_ptr->text[i].lang_key, info_ptr->text[i].lang_key,
info_ptr->text[i].text); info_ptr->text[i].text);
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
#else #else
png_warning(png_ptr, "Unable to write international text"); png_warning(png_ptr, "Unable to write international text");
#endif #endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
} }
else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt) else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt)
@ -354,11 +359,11 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
png_write_zTXt(png_ptr, info_ptr->text[i].key, png_write_zTXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0, info_ptr->text[i].text, 0,
info_ptr->text[i].compression); info_ptr->text[i].compression);
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
#else #else
png_warning(png_ptr, "Unable to write compressed text"); png_warning(png_ptr, "Unable to write compressed text");
#endif #endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
} }
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
@ -367,12 +372,11 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
/* Write uncompressed chunk */ /* Write uncompressed chunk */
png_write_tEXt(png_ptr, info_ptr->text[i].key, png_write_tEXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0); info_ptr->text[i].text, 0);
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
#else #else
png_warning(png_ptr, "Unable to write uncompressed text"); png_warning(png_ptr, "Unable to write uncompressed text");
#endif #endif
/* Mark this chunk as written */
info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
} }
} }
#endif #endif
@ -420,7 +424,6 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
} }
#ifdef PNG_CONVERT_tIME_SUPPORTED #ifdef PNG_CONVERT_tIME_SUPPORTED
/* "tm" structure is not supported on WindowsCE */
void PNGAPI void PNGAPI
png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm FAR * ttime) png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm FAR * ttime)
{ {
@ -456,9 +459,6 @@ png_create_write_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
warn_fn, NULL, NULL, NULL)); warn_fn, NULL, NULL, NULL));
} }
/* Alternate initialize png_ptr structure, and allocate any memory needed */
static void png_reset_filter_heuristics(png_structp png_ptr); /* forward decl */
PNG_FUNCTION(png_structp,PNGAPI PNG_FUNCTION(png_structp,PNGAPI
png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
@ -500,14 +500,13 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
*/ */
#ifdef USE_FAR_KEYWORD #ifdef USE_FAR_KEYWORD
if (setjmp(tmp_jmpbuf)) if (setjmp(tmp_jmpbuf))
png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf));
PNG_ABORT();
#else #else
if (setjmp(png_jmpbuf(png_ptr))) /* sets longjmp to match setjmp */ if (setjmp(png_jmpbuf(png_ptr))) /* sets longjmp to match setjmp */
#endif
#ifdef USE_FAR_KEYWORD
png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf));
#endif
PNG_ABORT(); PNG_ABORT();
#endif #endif
#endif
#ifdef PNG_USER_MEM_SUPPORTED #ifdef PNG_USER_MEM_SUPPORTED
png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
@ -520,7 +519,7 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
/* Initialize zbuf - compression buffer */ /* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE; png_ptr->zbuf_size = PNG_ZBUF_SIZE;
if (!png_cleanup_needed) if (png_cleanup_needed == 0)
{ {
png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr,
png_ptr->zbuf_size); png_ptr->zbuf_size);
@ -528,7 +527,7 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
png_cleanup_needed = 1; png_cleanup_needed = 1;
} }
if (png_cleanup_needed) if (png_cleanup_needed != 0)
{ {
/* Clean up PNG structure and deallocate any memory. */ /* Clean up PNG structure and deallocate any memory. */
png_free(png_ptr, png_ptr->zbuf); png_free(png_ptr, png_ptr->zbuf);
@ -544,10 +543,6 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
png_set_write_fn(png_ptr, NULL, NULL, NULL); png_set_write_fn(png_ptr, NULL, NULL, NULL);
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
png_reset_filter_heuristics(png_ptr);
#endif
return (png_ptr); return (png_ptr);
} }
@ -764,7 +759,7 @@ png_write_row(png_structp png_ptr, png_const_bytep row)
{ {
png_do_write_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass); png_do_write_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass);
/* This should always get caught above, but still ... */ /* This should always get caught above, but still ... */
if (!(row_info.width)) if (row_info.width == 0)
{ {
png_write_finish_row(png_ptr); png_write_finish_row(png_ptr);
return; return;
@ -864,7 +859,7 @@ png_write_flush(png_structp png_ptr)
png_error(png_ptr, "zlib error"); png_error(png_ptr, "zlib error");
} }
if (!(png_ptr->zstream.avail_out)) if ((png_ptr->zstream.avail_out) == 0)
{ {
/* Write the IDAT and reset the zlib output buffer */ /* Write the IDAT and reset the zlib output buffer */
png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
@ -982,13 +977,6 @@ png_write_destroy(png_structp png_ptr)
png_free(png_ptr, png_ptr->paeth_row); png_free(png_ptr, png_ptr->paeth_row);
#endif #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);
#endif
#ifdef PNG_SETJMP_SUPPORTED #ifdef PNG_SETJMP_SUPPORTED
/* Reset structure */ /* Reset structure */
png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf));
@ -1042,6 +1030,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
case 5: case 5:
case 6: case 6:
case 7: png_warning(png_ptr, "Unknown row filter for method 0"); case 7: png_warning(png_ptr, "Unknown row filter for method 0");
/* FALL THROUGH */
#endif /* PNG_WRITE_FILTER_SUPPORTED */ #endif /* PNG_WRITE_FILTER_SUPPORTED */
case PNG_FILTER_VALUE_NONE: case PNG_FILTER_VALUE_NONE:
png_ptr->do_filter = PNG_FILTER_NONE; break; png_ptr->do_filter = PNG_FILTER_NONE; break;
@ -1078,6 +1067,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
*/ */
if (png_ptr->row_buf != NULL) if (png_ptr->row_buf != NULL)
{ {
png_ptr->do_filter = PNG_FILTER_NONE;
#ifdef PNG_WRITE_FILTER_SUPPORTED #ifdef PNG_WRITE_FILTER_SUPPORTED
if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL) if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL)
{ {
@ -1138,8 +1128,8 @@ png_set_filter(png_structp png_ptr, int method, int filters)
} }
if (png_ptr->do_filter == PNG_NO_FILTERS) if (png_ptr->do_filter == PNG_NO_FILTERS)
#endif /* PNG_WRITE_FILTER_SUPPORTED */
png_ptr->do_filter = PNG_FILTER_NONE; png_ptr->do_filter = PNG_FILTER_NONE;
#endif /* PNG_WRITE_FILTER_SUPPORTED */
} }
} }
else else
@ -1153,122 +1143,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
* filtered data going to zlib more consistent, hopefully resulting in * filtered data going to zlib more consistent, hopefully resulting in
* better compression. * better compression.
*/ */
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */ #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* DEPRECATED */
/* Convenience reset API. */
static void
png_reset_filter_heuristics(png_structp 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_structp 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)(png_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)(png_sizeof(png_uint_16) * num_weights));
png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(png_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)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,
(png_uint_32)(png_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
@ -1276,52 +1151,11 @@ png_set_filter_heuristics(png_structp 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))
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 */
@ -1331,67 +1165,16 @@ png_set_filter_heuristics_fixed(png_structp 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))
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 /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ #endif /* WRITE_WEIGHTED_FILTER */
#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
void PNGAPI void PNGAPI
png_set_compression_level(png_structp png_ptr, int level) png_set_compression_level(png_structp png_ptr, int level)
{ {
@ -1470,6 +1253,7 @@ png_set_compression_method(png_structp png_ptr, int method)
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD; png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_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

16
3rdparty/libpng/pngwtran.c vendored
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 1.5.6 [November 3, 2011] * Copyright (c) 1998-2002,2004,2006-2012 Glenn Randers-Pehrson
* Copyright (c) 1998-2011 Glenn Randers-Pehrson * Copyright (c) 1998-2012 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.)
* *
@ -45,8 +45,20 @@ png_do_write_transformations(png_structp png_ptr, png_row_infop row_info)
#ifdef PNG_WRITE_FILLER_SUPPORTED #ifdef PNG_WRITE_FILLER_SUPPORTED
if (png_ptr->transformations & PNG_FILLER) if (png_ptr->transformations & PNG_FILLER)
{
if (png_ptr->color_type & (PNG_COLOR_MASK_ALPHA|PNG_COLOR_MASK_PALETTE))
{
/* GA, RGBA or palette; in any of these cases libpng will not do the
* the correct thing (whatever that might be).
*/
png_warning(png_ptr, "incorrect png_set_filler call ignored");
png_ptr->transformations &= ~PNG_FILLER;
}
else
png_do_strip_channel(row_info, png_ptr->row_buf + 1, png_do_strip_channel(row_info, png_ptr->row_buf + 1,
!(png_ptr->flags & PNG_FLAG_FILLER_AFTER)); !(png_ptr->flags & PNG_FLAG_FILLER_AFTER));
}
#endif #endif
#ifdef PNG_WRITE_PACKSWAP_SUPPORTED #ifdef PNG_WRITE_PACKSWAP_SUPPORTED

605
3rdparty/libpng/pngwutil.c vendored
View File

@ -1,8 +1,8 @@
/* pngwutil.c - utilities to write a PNG file /* pngwutil.c - utilities to write a PNG file
* *
* Last changed in libpng 1.5.10 [March 8, 2012] * Last changed in libpng 1.5.26 [December 17, 2015]
* Copyright (c) 1998-2012 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2015 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.)
* *
@ -30,19 +30,20 @@ png_save_uint_32(png_bytep buf, png_uint_32 i)
} }
#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 /* PNG signed integers are saved in 32-bit 2's complement format. ANSI C-90
* complement format. If this isn't the case, then this routine needs to * defines a cast of a signed integer to an unsigned integer either to preserve
* be modified to write data in two's complement format. Note that, * the value, if it is positive, or to calculate:
* the following works correctly even if png_int_32 has more than 32 bits *
* (compare the more complex code required on read for sign extention.) * (UNSIGNED_MAX+1) + integer
*
* Where UNSIGNED_MAX is the appropriate maximum unsigned value, so when the
* negative integral value is added the result will be an unsigned value
* correspnding to the 2's complement representation.
*/ */
void PNGAPI void PNGAPI
png_save_int_32(png_bytep buf, png_int_32 i) png_save_int_32(png_bytep buf, png_int_32 i)
{ {
buf[0] = (png_byte)((i >> 24) & 0xff); png_save_uint_32(buf, i);
buf[1] = (png_byte)((i >> 16) & 0xff);
buf[2] = (png_byte)((i >> 8) & 0xff);
buf[3] = (png_byte)(i & 0xff);
} }
#endif #endif
@ -315,6 +316,7 @@ png_zlib_release(png_structp png_ptr)
if (ret != Z_OK) if (ret != Z_OK)
{ {
#ifdef PNG_WARNINGS_SUPPORTED
png_const_charp err; png_const_charp err;
PNG_WARNING_PARAMETERS(p) PNG_WARNING_PARAMETERS(p)
@ -349,6 +351,7 @@ png_zlib_release(png_structp png_ptr)
png_formatted_warning(png_ptr, p, png_formatted_warning(png_ptr, p,
"zlib failed to reset compressor: @1(@2): @3"); "zlib failed to reset compressor: @1(@2): @3");
#endif
} }
} }
@ -460,24 +463,21 @@ png_text_compress(png_structp png_ptr,
old_ptr = comp->output_ptr; old_ptr = comp->output_ptr;
comp->output_ptr = (png_bytepp)png_malloc(png_ptr, comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
(png_alloc_size_t) (comp->max_output_ptr * png_sizeof(png_bytep)));
(comp->max_output_ptr * png_sizeof(png_charpp)));
png_memcpy(comp->output_ptr, old_ptr, old_max png_memcpy(comp->output_ptr, old_ptr, old_max
* png_sizeof(png_charp)); * png_sizeof(png_bytep));
png_free(png_ptr, old_ptr); png_free(png_ptr, old_ptr);
} }
else else
comp->output_ptr = (png_bytepp)png_malloc(png_ptr, comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
(png_alloc_size_t) (comp->max_output_ptr * png_sizeof(png_bytep)));
(comp->max_output_ptr * png_sizeof(png_charp)));
} }
/* Save the data */ /* Save the data */
comp->output_ptr[comp->num_output_ptr] = comp->output_ptr[comp->num_output_ptr] =
(png_bytep)png_malloc(png_ptr, (png_bytep)png_malloc(png_ptr, png_ptr->zbuf_size);
(png_alloc_size_t)png_ptr->zbuf_size);
png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf, png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
png_ptr->zbuf_size); png_ptr->zbuf_size);
@ -826,7 +826,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
png_ptr->zstream.zfree = png_zfree; png_ptr->zstream.zfree = png_zfree;
png_ptr->zstream.opaque = (voidpf)png_ptr; png_ptr->zstream.opaque = (voidpf)png_ptr;
if (!(png_ptr->do_filter)) if ((png_ptr->do_filter) == PNG_NO_FILTERS)
{ {
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE || if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE ||
png_ptr->bit_depth < 8) png_ptr->bit_depth < 8)
@ -896,17 +896,20 @@ void /* PRIVATE */
png_write_PLTE(png_structp png_ptr, png_const_colorp palette, png_write_PLTE(png_structp png_ptr, png_const_colorp palette,
png_uint_32 num_pal) png_uint_32 num_pal)
{ {
png_uint_32 i; png_uint_32 max_palette_length, i;
png_const_colorp pal_ptr; png_const_colorp pal_ptr;
png_byte buf[3]; png_byte buf[3];
png_debug(1, "in png_write_PLTE"); png_debug(1, "in png_write_PLTE");
max_palette_length = (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ?
(1 << png_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH;
if (( if ((
#ifdef PNG_MNG_FEATURES_SUPPORTED #ifdef PNG_MNG_FEATURES_SUPPORTED
!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) && !(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
#endif #endif
num_pal == 0) || num_pal > 256) num_pal == 0) || num_pal > max_palette_length)
{ {
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{ {
@ -1096,7 +1099,6 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
png_const_charp profile, int profile_len) png_const_charp profile, int profile_len)
{ {
png_size_t name_len; png_size_t name_len;
png_charp new_name;
compression_state comp; compression_state comp;
int embedded_profile_len = 0; int embedded_profile_len = 0;
@ -1108,8 +1110,7 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
comp.input = NULL; comp.input = NULL;
comp.input_len = 0; comp.input_len = 0;
if ((name_len = png_check_keyword(png_ptr, name, &new_name)) == 0) name_len = png_strlen(name);
return;
if (compression_type != PNG_COMPRESSION_TYPE_BASE) if (compression_type != PNG_COMPRESSION_TYPE_BASE)
png_warning(png_ptr, "Unknown compression type in iCCP chunk"); png_warning(png_ptr, "Unknown compression type in iCCP chunk");
@ -1128,8 +1129,6 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
{ {
png_warning(png_ptr, png_warning(png_ptr,
"Embedded profile length in iCCP chunk is negative"); "Embedded profile length in iCCP chunk is negative");
png_free(png_ptr, new_name);
return; return;
} }
@ -1137,8 +1136,6 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
{ {
png_warning(png_ptr, png_warning(png_ptr,
"Embedded profile length too large in iCCP chunk"); "Embedded profile length too large in iCCP chunk");
png_free(png_ptr, new_name);
return; return;
} }
@ -1150,7 +1147,7 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
profile_len = embedded_profile_len; profile_len = embedded_profile_len;
} }
if (profile_len) if (profile_len != 0)
profile_len = png_text_compress(png_ptr, profile, profile_len = png_text_compress(png_ptr, profile,
(png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp); (png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp);
@ -1158,18 +1155,21 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
png_write_chunk_header(png_ptr, png_iCCP, png_write_chunk_header(png_ptr, png_iCCP,
(png_uint_32)(name_len + profile_len + 2)); (png_uint_32)(name_len + profile_len + 2));
new_name[name_len + 1] = 0x00; png_write_chunk_data(png_ptr, (png_bytep)name, name_len);
png_write_chunk_data(png_ptr, (png_bytep)new_name, {
(png_size_t)(name_len + 2)); png_byte buffer[2];
buffer[0] = 0; /* terminate name */
buffer[1] = 0xFFU & compression_type;
png_write_chunk_data(png_ptr, buffer, 2);
}
if (profile_len) if (profile_len != 0)
{ {
png_write_compressed_data_out(png_ptr, &comp, profile_len); png_write_compressed_data_out(png_ptr, &comp, profile_len);
} }
png_write_chunk_end(png_ptr); png_write_chunk_end(png_ptr);
png_free(png_ptr, new_name);
} }
#endif #endif
@ -1179,7 +1179,6 @@ void /* PRIVATE */
png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette) png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
{ {
png_size_t name_len; png_size_t name_len;
png_charp new_name;
png_byte entrybuf[10]; png_byte entrybuf[10];
png_size_t entry_size = (spalette->depth == 8 ? 6 : 10); png_size_t entry_size = (spalette->depth == 8 ? 6 : 10);
png_size_t palette_size = entry_size * spalette->nentries; png_size_t palette_size = entry_size * spalette->nentries;
@ -1190,14 +1189,13 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
png_debug(1, "in png_write_sPLT"); png_debug(1, "in png_write_sPLT");
if ((name_len = png_check_keyword(png_ptr,spalette->name, &new_name))==0) name_len = png_strlen(spalette->name);
return;
/* Make sure we include the NULL after the name */ /* Make sure we include the NULL after the name */
png_write_chunk_header(png_ptr, png_sPLT, png_write_chunk_header(png_ptr, png_sPLT,
(png_uint_32)(name_len + 2 + palette_size)); (png_uint_32)(name_len + 2 + palette_size));
png_write_chunk_data(png_ptr, (png_bytep)new_name, png_write_chunk_data(png_ptr, (png_bytep)spalette->name,
(png_size_t)(name_len + 1)); (png_size_t)(name_len + 1));
png_write_chunk_data(png_ptr, &spalette->depth, (png_size_t)1); png_write_chunk_data(png_ptr, &spalette->depth, (png_size_t)1);
@ -1253,7 +1251,6 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
#endif #endif
png_write_chunk_end(png_ptr); png_write_chunk_end(png_ptr);
png_free(png_ptr, new_name);
} }
#endif #endif
@ -1370,7 +1367,8 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha,
} }
/* Write the chunk out as it is */ /* Write the chunk out as it is */
png_write_complete_chunk(png_ptr, png_tRNS, trans_alpha, (png_size_t)num_trans); png_write_complete_chunk(png_ptr, png_tRNS, trans_alpha,
(png_size_t)num_trans);
} }
else if (color_type == PNG_COLOR_TYPE_GRAY) else if (color_type == PNG_COLOR_TYPE_GRAY)
@ -1508,138 +1506,6 @@ png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist)
} }
#endif #endif
#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
* and if invalid, correct the keyword rather than discarding the entire
* chunk. The PNG 1.0 specification requires keywords 1-79 characters in
* length, forbids leading or trailing whitespace, multiple internal spaces,
* and the non-break space (0x80) from ISO 8859-1. Returns keyword length.
*
* The new_key is allocated to hold the corrected keyword and must be freed
* by the calling routine. This avoids problems with trying to write to
* static keywords without having to have duplicate copies of the strings.
*/
png_size_t /* PRIVATE */
png_check_keyword(png_structp png_ptr, png_const_charp key, png_charpp new_key)
{
png_size_t key_len;
png_const_charp ikp;
png_charp kp, dp;
int kflag;
int kwarn=0;
png_debug(1, "in png_check_keyword");
*new_key = NULL;
if (key == NULL || (key_len = png_strlen(key)) == 0)
{
png_warning(png_ptr, "zero length keyword");
return ((png_size_t)0);
}
png_debug1(2, "Keyword to be checked is '%s'", key);
*new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2));
if (*new_key == NULL)
{
png_warning(png_ptr, "Out of memory while procesing keyword");
return ((png_size_t)0);
}
/* Replace non-printing characters with a blank and print a warning */
for (ikp = key, dp = *new_key; *ikp != '\0'; ikp++, dp++)
{
if ((png_byte)*ikp < 0x20 ||
((png_byte)*ikp > 0x7E && (png_byte)*ikp < 0xA1))
{
PNG_WARNING_PARAMETERS(p)
png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_02x,
(png_byte)*ikp);
png_formatted_warning(png_ptr, p, "invalid keyword character 0x@1");
*dp = ' ';
}
else
{
*dp = *ikp;
}
}
*dp = '\0';
/* Remove any trailing white space. */
kp = *new_key + key_len - 1;
if (*kp == ' ')
{
png_warning(png_ptr, "trailing spaces removed from keyword");
while (*kp == ' ')
{
*(kp--) = '\0';
key_len--;
}
}
/* Remove any leading white space. */
kp = *new_key;
if (*kp == ' ')
{
png_warning(png_ptr, "leading spaces removed from keyword");
while (*kp == ' ')
{
kp++;
key_len--;
}
}
png_debug1(2, "Checking for multiple internal spaces in '%s'", kp);
/* Remove multiple internal spaces. */
for (kflag = 0, dp = *new_key; *kp != '\0'; kp++)
{
if (*kp == ' ' && kflag == 0)
{
*(dp++) = *kp;
kflag = 1;
}
else if (*kp == ' ')
{
key_len--;
kwarn = 1;
}
else
{
*(dp++) = *kp;
kflag = 0;
}
}
*dp = '\0';
if (kwarn)
png_warning(png_ptr, "extra interior spaces removed from keyword");
if (key_len == 0)
{
png_free(png_ptr, *new_key);
png_warning(png_ptr, "Zero length keyword");
}
if (key_len > 79)
{
png_warning(png_ptr, "keyword length must be 1 - 79 characters");
(*new_key)[79] = '\0';
key_len = 79;
}
return (key_len);
}
#endif
#ifdef PNG_WRITE_tEXt_SUPPORTED #ifdef PNG_WRITE_tEXt_SUPPORTED
/* Write a tEXt chunk */ /* Write a tEXt chunk */
void /* PRIVATE */ void /* PRIVATE */
@ -1647,12 +1513,10 @@ png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
png_size_t text_len) png_size_t text_len)
{ {
png_size_t key_len; png_size_t key_len;
png_charp new_key;
png_debug(1, "in png_write_tEXt"); png_debug(1, "in png_write_tEXt");
if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0) key_len = strlen(key);
return;
if (text == NULL || *text == '\0') if (text == NULL || *text == '\0')
text_len = 0; text_len = 0;
@ -1669,15 +1533,14 @@ png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
* any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them. * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
* The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
*/ */
png_write_chunk_data(png_ptr, (png_bytep)new_key, png_write_chunk_data(png_ptr, (png_bytep)key,
(png_size_t)(key_len + 1)); (png_size_t)(key_len + 1));
if (text_len) if (text_len != 0)
png_write_chunk_data(png_ptr, (png_const_bytep)text, png_write_chunk_data(png_ptr, (png_const_bytep)text,
(png_size_t)text_len); (png_size_t)text_len);
png_write_chunk_end(png_ptr); png_write_chunk_end(png_ptr);
png_free(png_ptr, new_key);
} }
#endif #endif
@ -1689,7 +1552,6 @@ png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
{ {
png_size_t key_len; png_size_t key_len;
png_byte buf; png_byte buf;
png_charp new_key;
compression_state comp; compression_state comp;
png_debug(1, "in png_write_zTXt"); png_debug(1, "in png_write_zTXt");
@ -1700,16 +1562,11 @@ png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
comp.input = NULL; comp.input = NULL;
comp.input_len = 0; comp.input_len = 0;
if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0) key_len = strlen(key);
{
png_free(png_ptr, new_key);
return;
}
if (text == NULL || *text == '\0' || compression==PNG_TEXT_COMPRESSION_NONE) if (text == NULL || *text == '\0' || compression==PNG_TEXT_COMPRESSION_NONE)
{ {
png_write_tEXt(png_ptr, new_key, text, (png_size_t)0); png_write_tEXt(png_ptr, key, text, (png_size_t)0);
png_free(png_ptr, new_key);
return; return;
} }
@ -1724,11 +1581,9 @@ png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
(png_uint_32)(key_len+text_len + 2)); (png_uint_32)(key_len+text_len + 2));
/* Write key */ /* Write key */
png_write_chunk_data(png_ptr, (png_bytep)new_key, png_write_chunk_data(png_ptr, (png_bytep)key,
(png_size_t)(key_len + 1)); (png_size_t)(key_len + 1));
png_free(png_ptr, new_key);
buf = (png_byte)compression; buf = (png_byte)compression;
/* Write compression */ /* Write compression */
@ -1749,8 +1604,6 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
png_const_charp lang, png_const_charp lang_key, png_const_charp text) png_const_charp lang, png_const_charp lang_key, png_const_charp text)
{ {
png_size_t lang_len, key_len, lang_key_len, text_len; png_size_t lang_len, key_len, lang_key_len, text_len;
png_charp new_lang;
png_charp new_key = NULL;
png_byte cbuf[2]; png_byte cbuf[2];
compression_state comp; compression_state comp;
@ -1761,15 +1614,13 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
comp.output_ptr = NULL; comp.output_ptr = NULL;
comp.input = NULL; comp.input = NULL;
if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0) key_len = png_strlen(key);
return;
if ((lang_len = png_check_keyword(png_ptr, lang, &new_lang)) == 0) if (lang == NULL)
{
png_warning(png_ptr, "Empty language field in iTXt chunk");
new_lang = NULL;
lang_len = 0; lang_len = 0;
}
else
lang_len = png_strlen(lang);
if (lang_key == NULL) if (lang_key == NULL)
lang_key_len = 0; lang_key_len = 0;
@ -1804,7 +1655,7 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
* any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them. * any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
* The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG. * The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
*/ */
png_write_chunk_data(png_ptr, (png_bytep)new_key, (png_size_t)(key_len + 1)); png_write_chunk_data(png_ptr, (png_bytep)key, (png_size_t)(key_len + 1));
/* Set the compression flag */ /* Set the compression flag */
if (compression == PNG_ITXT_COMPRESSION_NONE || if (compression == PNG_ITXT_COMPRESSION_NONE ||
@ -1820,7 +1671,7 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
png_write_chunk_data(png_ptr, cbuf, (png_size_t)2); png_write_chunk_data(png_ptr, cbuf, (png_size_t)2);
cbuf[0] = 0; cbuf[0] = 0;
png_write_chunk_data(png_ptr, (new_lang ? (png_const_bytep)new_lang : cbuf), png_write_chunk_data(png_ptr, (lang ? (png_const_bytep)lang : cbuf),
(png_size_t)(lang_len + 1)); (png_size_t)(lang_len + 1));
png_write_chunk_data(png_ptr, (lang_key ? (png_const_bytep)lang_key : cbuf), png_write_chunk_data(png_ptr, (lang_key ? (png_const_bytep)lang_key : cbuf),
@ -1829,9 +1680,6 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
png_write_compressed_data_out(png_ptr, &comp, text_len); png_write_compressed_data_out(png_ptr, &comp, text_len);
png_write_chunk_end(png_ptr); png_write_chunk_end(png_ptr);
png_free(png_ptr, new_key);
png_free(png_ptr, new_lang);
} }
#endif #endif
@ -1865,7 +1713,6 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
png_size_t purpose_len, units_len, total_len; png_size_t purpose_len, units_len, total_len;
png_size_tp params_len; png_size_tp params_len;
png_byte buf[10]; png_byte buf[10];
png_charp new_purpose;
int i; int i;
png_debug1(1, "in png_write_pCAL (%d parameters)", nparams); png_debug1(1, "in png_write_pCAL (%d parameters)", nparams);
@ -1873,7 +1720,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
if (type >= PNG_EQUATION_LAST) if (type >= PNG_EQUATION_LAST)
png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); png_warning(png_ptr, "Unrecognized equation type for pCAL chunk");
purpose_len = png_check_keyword(png_ptr, purpose, &new_purpose) + 1; purpose_len = strlen(purpose) + 1;
png_debug1(3, "pCAL purpose length = %d", (int)purpose_len); png_debug1(3, "pCAL purpose length = %d", (int)purpose_len);
units_len = png_strlen(units) + (nparams == 0 ? 0 : 1); units_len = png_strlen(units) + (nparams == 0 ? 0 : 1);
png_debug1(3, "pCAL units length = %d", (int)units_len); png_debug1(3, "pCAL units length = %d", (int)units_len);
@ -1895,7 +1742,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
png_debug1(3, "pCAL total length = %d", (int)total_len); png_debug1(3, "pCAL total length = %d", (int)total_len);
png_write_chunk_header(png_ptr, png_pCAL, (png_uint_32)total_len); png_write_chunk_header(png_ptr, png_pCAL, (png_uint_32)total_len);
png_write_chunk_data(png_ptr, (png_const_bytep)new_purpose, purpose_len); png_write_chunk_data(png_ptr, (png_const_bytep)purpose, purpose_len);
png_save_int_32(buf, X0); png_save_int_32(buf, X0);
png_save_int_32(buf + 4, X1); png_save_int_32(buf + 4, X1);
buf[8] = (png_byte)type; buf[8] = (png_byte)type;
@ -1903,8 +1750,6 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
png_write_chunk_data(png_ptr, buf, (png_size_t)10); png_write_chunk_data(png_ptr, buf, (png_size_t)10);
png_write_chunk_data(png_ptr, (png_const_bytep)units, (png_size_t)units_len); png_write_chunk_data(png_ptr, (png_const_bytep)units, (png_size_t)units_len);
png_free(png_ptr, new_purpose);
for (i = 0; i < nparams; i++) for (i = 0; i < nparams; i++)
{ {
png_write_chunk_data(png_ptr, (png_const_bytep)params[i], params_len[i]); png_write_chunk_data(png_ptr, (png_const_bytep)params[i], params_len[i]);
@ -2429,20 +2274,9 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_uint_32 mins, bpp; png_uint_32 mins, bpp;
png_byte filter_to_do = png_ptr->do_filter; png_byte filter_to_do = png_ptr->do_filter;
png_size_t row_bytes = row_info->rowbytes; png_size_t row_bytes = row_info->rowbytes;
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
int num_p_filters = png_ptr->num_prev_filters;
#endif
png_debug(1, "in png_write_find_filter"); png_debug(1, "in png_write_find_filter");
#ifndef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS)
{
/* These will never be selected so we need not test them. */
filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH);
}
#endif
/* Find out how many bytes offset each pixel is */ /* Find out how many bytes offset each pixel is */
bpp = (row_info->pixel_depth + 7) >> 3; bpp = (row_info->pixel_depth + 7) >> 3;
@ -2494,44 +2328,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
sum += (v < 128) ? v : 256 - v; sum += (v < 128) ? v : 256 - v;
} }
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
png_uint_32 sumhi, sumlo;
int j;
sumlo = sum & PNG_LOMASK;
sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; /* Gives us some footroom */
/* Reduce the sum if we match any of the previous rows */
for (j = 0; j < num_p_filters; j++)
{
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
{
sumlo = (sumlo * png_ptr->filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
sumhi = (sumhi * png_ptr->filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
}
}
/* Factor in the cost of this filter (this is here for completeness,
* but it makes no sense to have a "cost" for the NONE filter, as
* it has the minimum possible computational cost - none).
*/
sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
PNG_COST_SHIFT;
sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
PNG_COST_SHIFT;
if (sumhi > PNG_HIMASK)
sum = PNG_MAXSUM;
else
sum = (sumhi << PNG_HISHIFT) + sumlo;
}
#endif
mins = sum; mins = sum;
} }
@ -2564,44 +2360,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_size_t i; png_size_t i;
int v; int v;
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
/* We temporarily increase the "minimum sum" by the factor we
* would reduce the sum of this filter, so that we can do the
* early exit comparison without scaling the sum each time.
*/
if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int j;
png_uint_32 lmhi, lmlo;
lmlo = lmins & PNG_LOMASK;
lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
for (j = 0; j < num_p_filters; j++)
{
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
{
lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
}
}
lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
PNG_COST_SHIFT;
lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
PNG_COST_SHIFT;
if (lmhi > PNG_HIMASK)
lmins = PNG_MAXSUM;
else
lmins = (lmhi << PNG_HISHIFT) + lmlo;
}
#endif
for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp; for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp;
i++, rp++, dp++) i++, rp++, dp++)
{ {
@ -2621,40 +2379,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
break; break;
} }
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int j;
png_uint_32 sumhi, sumlo;
sumlo = sum & PNG_LOMASK;
sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
for (j = 0; j < num_p_filters; j++)
{
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
{
sumlo = (sumlo * png_ptr->inv_filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
sumhi = (sumhi * png_ptr->inv_filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
}
}
sumlo = (sumlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
PNG_COST_SHIFT;
sumhi = (sumhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
PNG_COST_SHIFT;
if (sumhi > PNG_HIMASK)
sum = PNG_MAXSUM;
else
sum = (sumhi << PNG_HISHIFT) + sumlo;
}
#endif
if (sum < mins) if (sum < mins)
{ {
mins = sum; mins = sum;
@ -2685,41 +2409,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_size_t i; png_size_t i;
int v; int v;
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int j;
png_uint_32 lmhi, lmlo;
lmlo = lmins & PNG_LOMASK;
lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
for (j = 0; j < num_p_filters; j++)
{
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
{
lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
}
}
lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
PNG_COST_SHIFT;
lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
PNG_COST_SHIFT;
if (lmhi > PNG_HIMASK)
lmins = PNG_MAXSUM;
else
lmins = (lmhi << PNG_HISHIFT) + lmlo;
}
#endif
for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1, for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
pp = prev_row + 1; i < row_bytes; i++) pp = prev_row + 1; i < row_bytes; i++)
{ {
@ -2731,40 +2420,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
break; break;
} }
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int j;
png_uint_32 sumhi, sumlo;
sumlo = sum & PNG_LOMASK;
sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
for (j = 0; j < num_p_filters; j++)
{
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
{
sumlo = (sumlo * png_ptr->filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
sumhi = (sumhi * png_ptr->filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
}
}
sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
PNG_COST_SHIFT;
sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
PNG_COST_SHIFT;
if (sumhi > PNG_HIMASK)
sum = PNG_MAXSUM;
else
sum = (sumhi << PNG_HISHIFT) + sumlo;
}
#endif
if (sum < mins) if (sum < mins)
{ {
mins = sum; mins = sum;
@ -2799,40 +2454,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_size_t i; png_size_t i;
int v; int v;
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int j;
png_uint_32 lmhi, lmlo;
lmlo = lmins & PNG_LOMASK;
lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
for (j = 0; j < num_p_filters; j++)
{
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_AVG)
{
lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
}
}
lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
PNG_COST_SHIFT;
lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
PNG_COST_SHIFT;
if (lmhi > PNG_HIMASK)
lmins = PNG_MAXSUM;
else
lmins = (lmhi << PNG_HISHIFT) + lmlo;
}
#endif
for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1, for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
pp = prev_row + 1; i < bpp; i++) pp = prev_row + 1; i < bpp; i++)
{ {
@ -2852,40 +2473,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
break; break;
} }
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int j;
png_uint_32 sumhi, sumlo;
sumlo = sum & PNG_LOMASK;
sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
for (j = 0; j < num_p_filters; j++)
{
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
{
sumlo = (sumlo * png_ptr->filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
sumhi = (sumhi * png_ptr->filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
}
}
sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
PNG_COST_SHIFT;
sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
PNG_COST_SHIFT;
if (sumhi > PNG_HIMASK)
sum = PNG_MAXSUM;
else
sum = (sumhi << PNG_HISHIFT) + sumlo;
}
#endif
if (sum < mins) if (sum < mins)
{ {
mins = sum; mins = sum;
@ -2940,40 +2527,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_size_t i; png_size_t i;
int v; int v;
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int j;
png_uint_32 lmhi, lmlo;
lmlo = lmins & PNG_LOMASK;
lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
for (j = 0; j < num_p_filters; j++)
{
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
{
lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
}
}
lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
PNG_COST_SHIFT;
lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
PNG_COST_SHIFT;
if (lmhi > PNG_HIMASK)
lmins = PNG_MAXSUM;
else
lmins = (lmhi << PNG_HISHIFT) + lmlo;
}
#endif
for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1, for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
pp = prev_row + 1; i < bpp; i++) pp = prev_row + 1; i < bpp; i++)
{ {
@ -3027,40 +2580,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
break; break;
} }
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
{
int j;
png_uint_32 sumhi, sumlo;
sumlo = sum & PNG_LOMASK;
sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
for (j = 0; j < num_p_filters; j++)
{
if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
{
sumlo = (sumlo * png_ptr->filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
sumhi = (sumhi * png_ptr->filter_weights[j]) >>
PNG_WEIGHT_SHIFT;
}
}
sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
PNG_COST_SHIFT;
sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
PNG_COST_SHIFT;
if (sumhi > PNG_HIMASK)
sum = PNG_MAXSUM;
else
sum = (sumhi << PNG_HISHIFT) + sumlo;
}
#endif
if (sum < mins) if (sum < mins)
{ {
best_row = png_ptr->paeth_row; best_row = png_ptr->paeth_row;
@ -3070,26 +2589,8 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
/* Do the actual writing of the filtered row data from the chosen filter. */ /* Do the actual writing of the filtered row data from the chosen filter. */
png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1); png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1);
#ifdef PNG_WRITE_FILTER_SUPPORTED
#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
/* Save the type of filter we picked this time for future calculations */
if (png_ptr->num_prev_filters > 0)
{
int j;
for (j = 1; j < num_p_filters; j++)
{
png_ptr->prev_filters[j] = png_ptr->prev_filters[j - 1];
}
png_ptr->prev_filters[j] = best_row[0];
}
#endif
#endif /* PNG_WRITE_FILTER_SUPPORTED */
} }
/* Do the actual writing of a previously filtered row. */ /* Do the actual writing of a previously filtered row. */
static void static void
png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row, png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row,

4
3rdparty/readme.txt vendored
View File

@ -14,8 +14,8 @@ libjpeg 8d (8.4) - The Independent JPEG Group's JPEG software.
HAVE_JPEG preprocessor flag must be set to make highgui use libjpeg. HAVE_JPEG preprocessor flag must be set to make highgui use libjpeg.
On UNIX systems configure script takes care of it. On UNIX systems configure script takes care of it.
------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------
libpng 1.5.12 - Portable Network Graphics library. libpng - Portable Network Graphics library.
Copyright (c) 2004, 2006-2012 Glenn Randers-Pehrson. The license and copyright notes can be found in libpng/LICENSE.
See libpng home page http://www.libpng.org See libpng home page http://www.libpng.org
for details and links to the source code for details and links to the source code