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[master] Imported from libpng-1.6.31.tar

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Glenn Randers-Pehrson 2017-07-27 05:25:33 -05:00
parent 8c552ddf5b
commit fbff8986e7
53 changed files with 1014 additions and 233 deletions
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65
ANNOUNCE
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@ -1,4 +1,4 @@
Libpng 1.6.30 - June 28, 2017 Libpng 1.6.31 - July 27, 2017
This is a public release of libpng, intended for use in production codes. This is a public release of libpng, intended for use in production codes.
@ -7,42 +7,51 @@ Files available for download:
Source files with LF line endings (for Unix/Linux) and with a Source files with LF line endings (for Unix/Linux) and with a
"configure" script "configure" script
libpng-1.6.30.tar.xz (LZMA-compressed, recommended) libpng-1.6.31.tar.xz (LZMA-compressed, recommended)
libpng-1.6.30.tar.gz libpng-1.6.31.tar.gz
Source files with CRLF line endings (for Windows), without the Source files with CRLF line endings (for Windows), without the
"configure" script "configure" script
lpng1630.7z (LZMA-compressed, recommended) lpng1631.7z (LZMA-compressed, recommended)
lpng1630.zip lpng1631.zip
Other information: Other information:
libpng-1.6.30-README.txt libpng-1.6.31-README.txt
libpng-1.6.30-LICENSE.txt libpng-1.6.31-LICENSE.txt
libpng-1.6.30-*.asc (armored detached GPG signatures) libpng-1.6.31-*.asc (armored detached GPG signatures)
Changes since the last public release (1.6.29): Changes since the last public release (1.6.30):
Added missing "$(CPPFLAGS)" to the compile line for c.pic.o in Guard the definition of _POSIX_SOURCE in pngpriv.h (AIX already defines it;
makefile.linux and makefile.solaris-x86 (Cosmin). bug report by Michael Felt).
Revised documentation of png_get_error_ptr() in the libpng manual. Revised pngpriv.h to work around failure to compile arm/filter_neon.S
Silence clang -Wcomma and const drop warnings (Viktor Szakats). ("typedef" directive is unrecognized by the assembler). The problem
Update Sourceforge URLs in documentation (https instead of http). was introduced in libpng-1.6.30beta01.
Document need to check for integer overflow when allocating a pixel Added "Requires: zlib" to libpng.pc.in (Pieter Neerincx).
buffer for multiple rows in contrib/gregbook, contrib/pngminus, Added special case for FreeBSD in arm/filter_neon.S (Maya Rashish).
example.c, and in the manual (suggested by Jaeseung Choi). This Added instructions for disabling hardware optimizations in INSTALL.
is similar to the bug reported against pngquant in CVE-2016-5735. Added "--enable-hardware-optimizations" configuration flag to enable
Removed reference to the obsolete PNG_SAFE_LIMITS macro in the documentation. or disable all hardware optimizations with one flag.
Check for integer overflow in contrib/visupng and contrib/tools/genpng. Updated CMakeLists.txt to add INTEL_SSE and MIPS_MSA platforms.
Do not double evaluate CMAKE_SYSTEM_PROCESSOR in CMakeLists.txt. Changed "int" to "png_size_t" in intel/filter_sse2.c to prevent
Test CMAKE_HOST_WIN32 instead of WIN32 in CMakeLists.txt. possible integer overflow (Bug report by John Bowler).
Fix some URL in documentation. Quieted "declaration after statement" warnings in intel/filter_sse2.c.
Avoid writing an empty IDAT when the last IDAT exactly fills the Added scripts/makefile-linux-opt, which has hardware optimizations enabled.
compression buffer (bug report by Brian Baird). This bug was Removed one of the GCC-7.1.0 'strict-overflow' warnings that result when
introduced in libpng-1.6.0. integers appear on both sides of a compare. Worked around the others by
Update copyright year in pnglibconf.h, make ltmain.sh executable. forcing the strict-overflow setting in the relevant functions to a level
Add a reference to the libpng.download site in README. where they are not reported (John Bowler).
Changed "FALL THROUGH" comments to "FALLTHROUGH" because GCC doesn't like
the space.
Worked around some C-style casts from (void*) because g++ 5.4.0 objects
to them.
Increased the buffer size for 'sprint' to pass the gcc 7.1.0 'sprint
overflow' check that is on by default with -Wall -Wextra.
Added eXIf chunk support.
Added a minimal eXIf chunk (with Orientation and FocalLengthIn35mmFilm
tags) to pngtest.png.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit (subscription required; visit

53
CHANGES
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@ -5855,6 +5855,59 @@ Version 1.6.30rc02 [June 25, 2017]
Version 1.6.30 [June 28, 2017] Version 1.6.30 [June 28, 2017]
No changes. No changes.
Version 1.6.31beta01 [July 5, 2017]
Guard the definition of _POSIX_SOURCE in pngpriv.h (AIX already defines it;
bug report by Michael Felt).
Revised pngpriv.h to work around failure to compile arm/filter_neon.S
("typedef" directive is unrecognized by the assembler). The problem
was introduced in libpng-1.6.30beta01.
Added "Requires: zlib" to libpng.pc.in (Pieter Neerincx).
Added special case for FreeBSD in arm/filter_neon.S (Maya Rashish).
Version 1.6.31beta02 [July 8, 2017]
Added instructions for disabling hardware optimizations in INSTALL.
Added "--enable-hardware-optimizations" configuration flag to enable
or disable all hardware optimizations with one flag.
Version 1.6.31beta03 [July 9, 2017]
Updated CMakeLists.txt to add INTEL_SSE and MIPS_MSA platforms.
Changed "int" to "png_size_t" in intel/filter_sse2.c to prevent
possible integer overflow (Bug report by John Bowler).
Quieted "declaration after statement" warnings in intel/filter_sse2.c.
Added scripts/makefile-linux-opt, which has hardware optimizations enabled.
Version 1.6.31beta04 [July 11, 2017]
Removed one of the GCC-7.1.0 'strict-overflow' warnings that result when
integers appear on both sides of a compare. Worked around the others by
forcing the strict-overflow setting in the relevant functions to a level
where they are not reported (John Bowler).
Changed "FALL THROUGH" comments to "FALLTHROUGH" because GCC doesn't like
the space.
Worked around some C-style casts from (void*) because g++ 5.4.0 objects
to them.
Increased the buffer size for 'sprint' to pass the gcc 7.1.0 'sprint
overflow' check that is on by default with -Wall -Wextra.
Version 1.6.31beta05 [July 13, 2017]
Added eXIf chunk support.
Version 1.6.31beta06 [July 17, 2017]
Added a minimal eXIf chunk (with Orientation and FocalLengthIn35mmFilm
tags) to pngtest.png.
Version 1.6.31beta07 [July 18, 2017]
Revised the eXIf chunk in pngtest.png to fix "Bad IFD1 Directory" warning.
Version 1.6.31rc01 [July 19, 2017]
No changes.
Version 1.6.31rc02 [July 25, 2017]
Fixed typo in example.c (png_free_image should be png_image_free) (Bug
report by John Smith)
Version 1.6.31 [July 27, 2017]
No changes.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit (subscription required; visit
https://lists.sourceforge.net/lists/listinfo/png-mng-implement https://lists.sourceforge.net/lists/listinfo/png-mng-implement

79
CMakeLists.txt
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@ -1,6 +1,6 @@
# CMakeLists.txt # CMakeLists.txt
# Copyright (C) 2007,2009-2016 Glenn Randers-Pehrson # Copyright (C) 2007,2009-2017 Glenn Randers-Pehrson
# Written by Christian Ehrlicher, 2007 # Written by Christian Ehrlicher, 2007
# Revised by Roger Lowman, 2009-2010 # Revised by Roger Lowman, 2009-2010
# Revised by Clifford Yapp, 2011-2012 # Revised by Clifford Yapp, 2011-2012
@ -36,7 +36,7 @@ enable_testing()
set(PNGLIB_MAJOR 1) set(PNGLIB_MAJOR 1)
set(PNGLIB_MINOR 6) set(PNGLIB_MINOR 6)
set(PNGLIB_RELEASE 30) set(PNGLIB_RELEASE 31)
set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR}) set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE}) set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
@ -76,9 +76,13 @@ option(PNG_FRAMEWORK "Build OS X framework" OFF)
option(PNG_DEBUG "Build with debug output" OFF) option(PNG_DEBUG "Build with debug output" OFF)
option(PNGARG "Disable ANSI-C prototypes" OFF) option(PNGARG "Disable ANSI-C prototypes" OFF)
option(PNG_HARDWARE_OPTIMIZATIONS "Enable Hardware Optimizations" ON)
set(PNG_PREFIX "" CACHE STRING "Prefix to add to the API function names") set(PNG_PREFIX "" CACHE STRING "Prefix to add to the API function names")
set(DFA_XTRA "" CACHE FILEPATH "File containing extra configuration settings") set(DFA_XTRA "" CACHE FILEPATH "File containing extra configuration settings")
if(PNG_HARDWARE_OPTIMIZATIONS)
# set definitions and sources for arm # set definitions and sources for arm
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" OR if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64") CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64")
@ -112,11 +116,9 @@ endif()
# set definitions and sources for powerpc # set definitions and sources for powerpc
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc*" OR if(CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc*" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "^ppc64*" ) CMAKE_SYSTEM_PROCESSOR MATCHES "^ppc64*" )
set(PNG_POWERPC_VSX_POSSIBLE_VALUES check on off) set(PNG_POWERPC_VSX_POSSIBLE_VALUES on off)
set(PNG_POWERPC_VSX "check" CACHE STRING "Enable POWERPC VSX optimizations: set(PNG_POWERPC_VSX "on" CACHE STRING "Enable POWERPC VSX optimizations:
check: (default) use internal checking code; off: disable the optimizations.")
off: disable the optimizations;
on: turn on unconditionally.")
set_property(CACHE PNG_POWERPC_VSX PROPERTY STRINGS set_property(CACHE PNG_POWERPC_VSX PROPERTY STRINGS
${PNG_POWERPC_VSX_POSSIBLE_VALUES}) ${PNG_POWERPC_VSX_POSSIBLE_VALUES})
list(FIND PNG_POWERPC_VSX_POSSIBLE_VALUES ${PNG_POWERPC_VSX} index) list(FIND PNG_POWERPC_VSX_POSSIBLE_VALUES ${PNG_POWERPC_VSX} index)
@ -127,19 +129,62 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "^powerpc*" OR
set(libpng_powerpc_sources set(libpng_powerpc_sources
powerpc/powerpc_init.c powerpc/powerpc_init.c
powerpc/filter_vsx_intrinsics.c) powerpc/filter_vsx_intrinsics.c)
if(${PNG_POWERPC_VSX} STREQUAL "on") if(${PNG_POWERPC_VSX} STREQUAL "on")
add_definitions(-DPNG_POWERPC_VSX_OPT=2) add_definitions(-DPNG_POWERPC_VSX_OPT=2)
elseif(${PNG_POWERPC_VSX} STREQUAL "check")
add_definitions(-DPNG_POWERPC_VSX_CHECK_SUPPORTED)
message(WARNING
"[PNG_POWERPC_VSX==check] Please check contrib/powerpc/README file for the list of supported OSes.")
endif() endif()
else() else()
add_definitions(-DPNG_POWERPC_VSX_OPT=0) add_definitions(-DPNG_POWERPC_VSX_OPT=0)
endif() endif()
endif() endif()
# set definitions and sources for intel
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^i?86" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "^x86_64*" )
set(PNG_INTEL_SSE_POSSIBLE_VALUES on off)
set(PNG_INTEL_SSE "on" CACHE STRING "Enable INTEL_SSE optimizations:
off: disable the optimizations")
set_property(CACHE PNG_INTEL_SSE PROPERTY STRINGS
${PNG_INTEL_SSE_POSSIBLE_VALUES})
list(FIND PNG_INTEL_SSE_POSSIBLE_VALUES ${PNG_INTEL_SSE} index)
if(index EQUAL -1)
message(FATAL_ERROR
" PNG_INTEL_SSE must be one of [${PNG_INTEL_SSE_POSSIBLE_VALUES}]")
elseif(NOT ${PNG_INTEL_SSE} STREQUAL "no")
set(libpng_intel_sources
intel/intel_init.c
intel/filter_sse2_intrinsics.c)
if(${PNG_INTEL_SSE} STREQUAL "on")
add_definitions(-DPNG_INTEL_SSE_OPT=1)
endif()
else()
add_definitions(-DPNG_INTEL_SSE_OPT=0)
endif()
endif()
# set definitions and sources for MIPS
if(CMAKE_SYSTEM_PROCESSOR MATCHES "mipsel*" OR
CMAKE_SYSTEM_PROCESSOR MATCHES "mips64el*" )
set(PNG_MIPS_MSA_POSSIBLE_VALUES on off)
set(PNG_MIPS_MSA "on" CACHE STRING "Enable MIPS_MSA optimizations:
off: disable the optimizations")
set_property(CACHE PNG_MIPS_MSA PROPERTY STRINGS
${PNG_MIPS_MSA_POSSIBLE_VALUES})
list(FIND PNG_MIPS_MSA_POSSIBLE_VALUES ${PNG_MIPS_MSA} index)
if(index EQUAL -1)
message(FATAL_ERROR
" PNG_MIPS_MSA must be one of [${PNG_MIPS_MSA_POSSIBLE_VALUES}]")
elseif(NOT ${PNG_MIPS_MSA} STREQUAL "no")
set(libpng_mips_sources
mips/mips_init.c
mips/filter_msa_intrinsics.c)
if(${PNG_MIPS_MSA} STREQUAL "on")
add_definitions(-DPNG_MIPS_MSA_OPT=2)
endif()
else()
add_definitions(-DPNG_MIPS_MSA_OPT=0)
endif()
endif()
endif(PNG_HARDWARE_OPTIMIZATIONS)
# SET LIBNAME # SET LIBNAME
set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR}) set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR})
@ -432,6 +477,8 @@ set(libpng_sources
pngwtran.c pngwtran.c
pngwutil.c pngwutil.c
${libpng_arm_sources} ${libpng_arm_sources}
${libpng_intel_sources}
${libpng_mips_sources}
${libpng_powerpc_sources} ${libpng_powerpc_sources}
) )
set(pngtest_sources set(pngtest_sources
@ -726,12 +773,12 @@ macro(CREATE_SYMLINK SRC_FILE DEST_FILE)
DEPENDS ${PNG_LIB_TARGETS} DEPENDS ${PNG_LIB_TARGETS}
) )
ADD_CUSTOM_TARGET(${DEST_FILE}_COPY ALL DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}) ADD_CUSTOM_TARGET(${DEST_FILE}_COPY ALL DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
else(WIN32 AND NOT CYGWIN AND NOT MSYS) else(CMAKE_HOST_WIN32 AND NOT CYGWIN AND NOT MSYS)
get_filename_component(LINK_TARGET "${SRC_FILE}" NAME) get_filename_component(LINK_TARGET "${SRC_FILE}" NAME)
execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_LIBRARY_OUTPUT_DIRECTORY}) execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_LIBRARY_OUTPUT_DIRECTORY})
execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}) execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}) execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
endif(WIN32 AND NOT CYGWIN AND NOT MSYS) endif(CMAKE_HOST_WIN32 AND NOT CYGWIN AND NOT MSYS)
endmacro() endmacro()
# Create source generation scripts. # Create source generation scripts.
@ -770,7 +817,7 @@ endif(NOT WIN32 OR CYGWIN OR MINGW)
# SET UP LINKS # SET UP LINKS
if(PNG_SHARED) if(PNG_SHARED)
set_target_properties(png PROPERTIES set_target_properties(png PROPERTIES
# VERSION 16.${PNGLIB_RELEASE}.1.6.30 # VERSION 16.${PNGLIB_RELEASE}.1.6.31
VERSION 16.${PNGLIB_RELEASE}.0 VERSION 16.${PNGLIB_RELEASE}.0
SOVERSION 16 SOVERSION 16
CLEAN_DIRECT_OUTPUT 1) CLEAN_DIRECT_OUTPUT 1)
@ -855,7 +902,7 @@ if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig) DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config
DESTINATION bin) DESTINATION bin)
endif(NOT WIN32 OR CYGWIN OR MINGW) endif(NOT CMAKE_HOST_WIN32 OR CYGWIN OR MINGW)
endif() endif()
# On versions of CMake that support it, create an export file CMake # On versions of CMake that support it, create an export file CMake

67
INSTALL
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@ -16,10 +16,11 @@ Contents
XI. Prepending a prefix to exported symbols XI. Prepending a prefix to exported symbols
XII. Configuring for compiler xxx: XII. Configuring for compiler xxx:
XIII. Removing unwanted object code XIII. Removing unwanted object code
XIV. Changes to the build and configuration of libpng in libpng-1.5.x XIV. Enabling or disabling hardware optimizations
XV. Setjmp/longjmp issues XV. Changes to the build and configuration of libpng in libpng-1.5.x
XVI. Common linking failures XVI. Setjmp/longjmp issues
XVII. Other sources of information about libpng XVII. Common linking failures
XVIII. Other sources of information about libpng
I. Simple installation I. Simple installation
@ -281,7 +282,57 @@ library to fail if they call functions not available in your library.
The size of the library itself should not be an issue, because only The size of the library itself should not be an issue, because only
those sections that are actually used will be loaded into memory. those sections that are actually used will be loaded into memory.
XIV. Changes to the build and configuration of libpng in libpng-1.5.x XIV. Enabling or disabling hardware optimizations
Certain hardware capabilites, such as the Intel SSE instructions,
are normally detected at run time. Enable them with configure options
such as one of
--enable-arm-neon=yes
--enable-mips-msa=yes
--enable-intel-sse=yes
--enable-powerpc-vsx=yes
or enable them all at once with
--enable-hardware-optimizations=yes
or, if you are not using "configure", you can use one
or more of
CPPFLAGS += "-DPNG_ARM_NEON"
CPPFLAGS += "-DPNG_MIPS_MSA"
CPPFLAGS += "-DPNG_INTEL_SSE"
CPPFLAGS += "-DPNG_POWERPC_VSX"
See for example scripts/makefile.linux-opt
If you wish to avoid using them,
you can disable them via the configure option
--disable-hardware-optimizations
to disable them all, or
--enable-intel-sse=no
to disable a particular one,
or via compiler-command options such as
CPPFLAGS += "-DPNG_ARM_NEON_OPT=0, -DPNG_MIPS_MSA_OPT=0,
-DPNG_INTEL_SSE_OPT=0, -DPNG_POWERPC_VSX_OPT=0"
If you are using cmake, hardware optimizations are "on"
by default. To disable them, use
cmake . -DPNG_ARM_NEON=no -DPNG_INTEL_SSE=no \
-DPNG_MIPS_MSA=no -DPNG_POWERPC_VSX=no
or disable them all at once with
cmake . -DPNG_HARDWARE_OPTIMIZATIONS=no
XV. Changes to the build and configuration of libpng in libpng-1.5.x
Details of internal changes to the library code can be found in the CHANGES Details of internal changes to the library code can be found in the CHANGES
file and in the GIT repository logs. These will be of no concern to the vast file and in the GIT repository logs. These will be of no concern to the vast
@ -372,7 +423,7 @@ $PREFIX/include directory). Do not edit pnglibconf.h after you have built
libpng, because than the settings would not accurately reflect the settings libpng, because than the settings would not accurately reflect the settings
that were used to build libpng. that were used to build libpng.
XV. Setjmp/longjmp issues XVI. Setjmp/longjmp issues
Libpng uses setjmp()/longjmp() for error handling. Unfortunately setjmp() Libpng uses setjmp()/longjmp() for error handling. Unfortunately setjmp()
is known to be not thread-safe on some platforms and we don't know of is known to be not thread-safe on some platforms and we don't know of
@ -390,7 +441,7 @@ This requires setjmp/longjmp, so you must either build the library
with PNG_SETJMP_SUPPORTED defined, or with PNG_SIMPLIFIED_READ_SUPPORTED with PNG_SETJMP_SUPPORTED defined, or with PNG_SIMPLIFIED_READ_SUPPORTED
and PNG_SIMPLIFIED_WRITE_SUPPORTED undefined. and PNG_SIMPLIFIED_WRITE_SUPPORTED undefined.
XVI. Common linking failures XVII. Common linking failures
If your application fails to find libpng or zlib entries while linking: If your application fails to find libpng or zlib entries while linking:
@ -402,7 +453,7 @@ If your application fails to find libpng or zlib entries while linking:
If you are using the vstudio project, observe the WARNING in If you are using the vstudio project, observe the WARNING in
project/vstudio/README.txt. project/vstudio/README.txt.
XVII. Other sources of information about libpng: XVIII. Other sources of information about libpng:
Further information can be found in the README and libpng-manual.txt Further information can be found in the README and libpng-manual.txt
files, in the individual makefiles, in png.h, and the manual pages files, in the individual makefiles, in png.h, and the manual pages

2
LICENSE
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@ -10,7 +10,7 @@ this sentence.
This code is released under the libpng license. This code is released under the libpng license.
libpng versions 1.0.7, July 1, 2000 through 1.6.30, June 28, 2017 are libpng versions 1.0.7, July 1, 2000 through 1.6.31, July 27, 2017 are
Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
derived from libpng-1.0.6, and are distributed according to the same 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 disclaimer and license as libpng-1.0.6 with the following individuals

2
README
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@ -1,4 +1,4 @@
README for libpng version 1.6.30 - June 28, 2017 (shared library 16.0) README for libpng version 1.6.31 - July 27, 2017 (shared library 16.0)
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.

6
arm/filter_neon.S
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@ -1,9 +1,9 @@
/* filter_neon.S - NEON optimised filter functions /* filter_neon.S - NEON optimised filter functions
* *
* Copyright (c) 2014 Glenn Randers-Pehrson * Copyright (c) 2014,2017 Glenn Randers-Pehrson
* Written by Mans Rullgard, 2011. * Written by Mans Rullgard, 2011.
* Last changed in libpng 1.6.16 [December 22, 2014] * Last changed in libpng 1.6.31 [July 27, 2017]
* *
* 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
@ -16,7 +16,7 @@
#define PNG_VERSION_INFO_ONLY #define PNG_VERSION_INFO_ONLY
#include "../pngpriv.h" #include "../pngpriv.h"
#if defined(__linux__) && defined(__ELF__) #if (defined(__linux__) || defined(__FreeBSD__)) && defined(__ELF__)
.section .note.GNU-stack,"",%progbits /* mark stack as non-executable */ .section .note.GNU-stack,"",%progbits /* mark stack as non-executable */
#endif #endif

55
configure.ac
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@ -25,7 +25,7 @@ AC_PREREQ([2.68])
dnl Version number stuff here: dnl Version number stuff here:
AC_INIT([libpng],[1.6.30],[png-mng-implement@lists.sourceforge.net]) AC_INIT([libpng],[1.6.31],[png-mng-implement@lists.sourceforge.net])
AC_CONFIG_MACRO_DIR([scripts]) AC_CONFIG_MACRO_DIR([scripts])
# libpng does not follow GNU file name conventions (hence 'foreign') # libpng does not follow GNU file name conventions (hence 'foreign')
@ -46,10 +46,10 @@ dnl automake, so the following is not necessary (and is not defined anyway):
dnl AM_PREREQ([1.11.2]) dnl AM_PREREQ([1.11.2])
dnl stop configure from automagically running automake dnl stop configure from automagically running automake
PNGLIB_VERSION=1.6.30 PNGLIB_VERSION=1.6.31
PNGLIB_MAJOR=1 PNGLIB_MAJOR=1
PNGLIB_MINOR=6 PNGLIB_MINOR=6
PNGLIB_RELEASE=30 PNGLIB_RELEASE=31
dnl End of version number stuff dnl End of version number stuff
@ -300,6 +300,55 @@ AM_CONDITIONAL([DO_INSTALL_LIBPNG_CONFIG],
# HOST SPECIFIC OPTIONS # HOST SPECIFIC OPTIONS
# ===================== # =====================
# #
# DEFAULT
# =======
#
AC_ARG_ENABLE([hardware-optimizations],
AS_HELP_STRING([[[--enable-hardware-optimizations]]],
[Enable hardware optimizations: =no/off, yes/on:]),
[case "$enableval" in
no|off)
# disable hardware optimization on all systems:
enable_arm_neon=no
AC_DEFINE([PNG_ARM_NEON_OPT], [0],
[Disable ARM_NEON optimizations])
enable_mips_msa=no
AC_DEFINE([PNG_MIPS_MSA_OPT], [0],
[Disable MIPS_MSA optimizations])
enable_powerpc_vsx=no
AC_DEFINE([PNG_POWERPC_VSX_OPT], [0],
[Disable POWERPC VSX optimizations])
enable_intel_sse=no
AC_DEFINE([PNG_INTEL_SSE_OPT], [0],
[Disable INTEL_SSE optimizations])
;;
*)
# allow enabling hardware optimization on any system:
case "$host_cpu" in
arm*|aarch64*)
enable_arm_neon=yes
AC_DEFINE([PNG_ARM_NEON_OPT], [0],
[Enable ARM_NEON optimizations])
;;
mipsel*|mips64el*)
enable_mips_msa=yes
AC_DEFINE([PNG_MIPS_MSA_OPT], [0],
[Enable MIPS_MSA optimizations])
;;
i?86|x86_64)
enable_intel_sse=yes
AC_DEFINE([PNG_INTEL_SSE_OPT], [1],
[Enable Intel SSE optimizations])
;;
powerpc*|ppc64*)
enable_powerpc_vsx=yes
AC_DEFINE([PNG_POWERPC_VSX_OPT], [2],
[Enable POWERPC VSX optimizations])
;;
esac
;;
esac])
# ARM # ARM
# === # ===
# #

14
contrib/arm-neon/linux.c
View File

@ -1,8 +1,8 @@
/* contrib/arm-neon/linux.c /* contrib/arm-neon/linux.c
* *
* Copyright (c) 2014 Glenn Randers-Pehrson * Last changed in libpng 1.6.31 [July 27, 2017]
* Written by John Bowler, 2014. * Copyright (c) 2014, 2017 Glenn Randers-Pehrson
* Last changed in libpng 1.6.16 [December 22, 2014] * Written by John Bowler, 2014, 2017.
* *
* 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
@ -62,7 +62,7 @@ png_have_neon(png_structp png_ptr)
counter=0; counter=0;
state = Feature; state = Feature;
/* FALL THROUGH */ /* FALLTHROUGH */
case Feature: case Feature:
/* Match 'FEATURE', ASCII case insensitive. */ /* Match 'FEATURE', ASCII case insensitive. */
@ -75,7 +75,7 @@ png_have_neon(png_structp png_ptr)
/* did not match 'feature' */ /* did not match 'feature' */
state = SkipLine; state = SkipLine;
/* FALL THROUGH */ /* FALLTHROUGH */
case SkipLine: case SkipLine:
skipLine: skipLine:
@ -110,7 +110,7 @@ png_have_neon(png_structp png_ptr)
state = Neon; state = Neon;
counter = 0; counter = 0;
/* FALL THROUGH */ /* FALLTHROUGH */
case Neon: case Neon:
/* Look for 'neon' tag */ /* Look for 'neon' tag */
@ -122,7 +122,7 @@ png_have_neon(png_structp png_ptr)
} }
state = SkipTag; state = SkipTag;
/* FALL THROUGH */ /* FALLTHROUGH */
case SkipTag: case SkipTag:
/* Skip non-space characters */ /* Skip non-space characters */

28
contrib/libtests/pngstest.c
View File

@ -1,9 +1,8 @@
/*- /*-
* pngstest.c * pngstest.c
* *
* Copyright (c) 2013-2016 John Cunningham Bowler * Last changed in libpng 1.6.31 [July 27, 2017]
* * Copyright (c) 2013-2017 John Cunningham Bowler
* Last changed in libpng 1.6.24 [August 4, 2016]
* *
* 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
@ -2746,22 +2745,27 @@ compare_two_images(Image *a, Image *b, int via_linear,
*/ */
else if ((a->opts & ACCUMULATE) == 0) else if ((a->opts & ACCUMULATE) == 0)
{ {
# ifdef __GNUC__
# define BYTE_CHARS 20 /* 2^32: GCC sprintf warning */
# else
# define BYTE_CHARS 3 /* 2^8: real maximum value */
# endif
/* Check the original image first, /* Check the original image first,
* TODO: deal with input images with bad pixel values? * TODO: deal with input images with bad pixel values?
*/ */
if (amax >= a->image.colormap_entries) if (amax >= a->image.colormap_entries)
{ {
char pindex[9]; char pindex[3+2*BYTE_CHARS];
sprintf(pindex, "%d[%lu]", amax, sprintf(pindex, "%d[%u]", amax,
(unsigned long)a->image.colormap_entries); (png_byte)/*SAFE*/a->image.colormap_entries);
return logerror(a, a->file_name, ": bad pixel index: ", pindex); return logerror(a, a->file_name, ": bad pixel index: ", pindex);
} }
else if (bmax >= b->image.colormap_entries) else if (bmax >= b->image.colormap_entries)
{ {
char pindex[9]; char pindex[3+2*BYTE_CHARS];
sprintf(pindex, "%d[%lu]", bmax, sprintf(pindex, "%d[%u]", bmax,
(unsigned long)b->image.colormap_entries); (png_byte)/*SAFE*/b->image.colormap_entries);
return logerror(b, b->file_name, ": bad pixel index: ", pindex); return logerror(b, b->file_name, ": bad pixel index: ", pindex);
} }
} }
@ -2881,10 +2885,13 @@ compare_two_images(Image *a, Image *b, int via_linear,
{ {
case 4: case 4:
if (pua[btoa[3]] != pub[3]) break; if (pua[btoa[3]] != pub[3]) break;
/* FALLTHROUGH */
case 3: case 3:
if (pua[btoa[2]] != pub[2]) break; if (pua[btoa[2]] != pub[2]) break;
/* FALLTHROUGH */
case 2: case 2:
if (pua[btoa[1]] != pub[1]) break; if (pua[btoa[1]] != pub[1]) break;
/* FALLTHROUGH */
case 1: case 1:
if (pua[btoa[0]] != pub[0]) break; if (pua[btoa[0]] != pub[0]) break;
if (alpha_added != 4 && pub[alpha_added] != 65535) break; if (alpha_added != 4 && pub[alpha_added] != 65535) break;
@ -2900,10 +2907,13 @@ compare_two_images(Image *a, Image *b, int via_linear,
{ {
case 4: case 4:
if (psa[btoa[3]] != psb[3]) break; if (psa[btoa[3]] != psb[3]) break;
/* FALLTHROUGH */
case 3: case 3:
if (psa[btoa[2]] != psb[2]) break; if (psa[btoa[2]] != psb[2]) break;
/* FALLTHROUGH */
case 2: case 2:
if (psa[btoa[1]] != psb[1]) break; if (psa[btoa[1]] != psb[1]) break;
/* FALLTHROUGH */
case 1: case 1:
if (psa[btoa[0]] != psb[0]) break; if (psa[btoa[0]] != psb[0]) break;
if (alpha_added != 4 && psb[alpha_added] != 255) break; if (alpha_added != 4 && psb[alpha_added] != 255) break;

6
contrib/libtests/pngunknown.c
View File

@ -1,8 +1,8 @@
/* pngunknown.c - test the read side unknown chunk handling /* pngunknown.c - test the read side unknown chunk handling
* *
* Last changed in libpng 1.6.26 [October 20, 2016] * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 2015,2016 Glenn Randers-Pehrson * Copyright (c) 2015,2017 Glenn Randers-Pehrson
* Written by John Cunningham Bowler * Written by John Cunningham Bowler
* *
* This code is released under the libpng license. * This code is released under the libpng license.
@ -614,7 +614,7 @@ get_unknown(display *d, png_infop info_ptr, int after_IDAT)
++(d->error_count); ++(d->error_count);
break; break;
} }
/* FALL THROUGH (safe) */ /* FALLTHROUGH */ /* (safe) */
case PNG_HANDLE_CHUNK_ALWAYS: case PNG_HANDLE_CHUNK_ALWAYS:
break; break;
} }

10
contrib/libtests/pngvalid.c
View File

@ -1,7 +1,7 @@
/* pngvalid.c - validate libpng by constructing then reading png files. /* pngvalid.c - validate libpng by constructing then reading png files.
* *
* Last changed in libpng 1.6.29 [March 16, 2017] * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 2014-2017 John Cunningham Bowler * Copyright (c) 2014-2017 John Cunningham Bowler
* *
* This code is released under the libpng license. * This code is released under the libpng license.
@ -6584,16 +6584,16 @@ transform_info_imp(transform_display *dp, png_structp pp, png_infop pi)
{ {
case PNG_COLOR_TYPE_PALETTE: case PNG_COLOR_TYPE_PALETTE:
if (dp->output_bit_depth > 8) goto error; if (dp->output_bit_depth > 8) goto error;
/*FALL THROUGH*/ /* FALLTHROUGH */
case PNG_COLOR_TYPE_GRAY: case PNG_COLOR_TYPE_GRAY:
if (dp->output_bit_depth == 1 || dp->output_bit_depth == 2 || if (dp->output_bit_depth == 1 || dp->output_bit_depth == 2 ||
dp->output_bit_depth == 4) dp->output_bit_depth == 4)
break; break;
/*FALL THROUGH*/ /* FALLTHROUGH */
default: default:
if (dp->output_bit_depth == 8 || dp->output_bit_depth == 16) if (dp->output_bit_depth == 8 || dp->output_bit_depth == 16)
break; break;
/*FALL THROUGH*/ /* FALLTHROUGH */
error: error:
{ {
char message[128]; char message[128];
@ -9994,9 +9994,9 @@ gamma_component_validate(const char *name, const validate_info *vi,
case PNG_BACKGROUND_GAMMA_FILE: case PNG_BACKGROUND_GAMMA_FILE:
case PNG_BACKGROUND_GAMMA_UNIQUE: case PNG_BACKGROUND_GAMMA_UNIQUE:
use_background = (alpha >= 0 && alpha < 1); use_background = (alpha >= 0 && alpha < 1);
/*FALL THROUGH*/
# endif # endif
# ifdef PNG_READ_ALPHA_MODE_SUPPORTED # ifdef PNG_READ_ALPHA_MODE_SUPPORTED
/* FALLTHROUGH */
case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD: case ALPHA_MODE_OFFSET + PNG_ALPHA_STANDARD:
case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN: case ALPHA_MODE_OFFSET + PNG_ALPHA_BROKEN:
case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED: case ALPHA_MODE_OFFSET + PNG_ALPHA_OPTIMIZED:

2
contrib/testpngs/makepngs.sh
View File

@ -5,7 +5,7 @@
# Copyright (c) 2015 John Cunningham Bowler # Copyright (c) 2015 John Cunningham Bowler
# Last changed in libpng 1.7.0 [(PENDING RELEASE)] # Last changed in libpng 1.6.20 [December 3, 2015]
# 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

13
contrib/tools/pngfix.c
View File

@ -1,8 +1,7 @@
/* pngfix.c /* pngfix.c
* *
* Copyright (c) 2014-2016 John Cunningham Bowler * Last changed in libpng 1.6.31 [July 27, 2017]
* * Copyright (c) 2014-2017 John Cunningham Bowler
* Last changed in libpng 1.6.26 [October 20, 2016]
* *
* 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
@ -2416,7 +2415,7 @@ zlib_advance(struct zlib *zlib, png_uint_32 nbytes)
endrc = ZLIB_TOO_FAR_BACK; endrc = ZLIB_TOO_FAR_BACK;
break; break;
} }
/* FALL THROUGH */ /* FALLTHROUGH */
default: default:
zlib_message(zlib, 0/*stream error*/); zlib_message(zlib, 0/*stream error*/);
@ -2570,7 +2569,7 @@ zlib_run(struct zlib *zlib)
list->lengths[i] -= zlib->extra_bytes; list->lengths[i] -= zlib->extra_bytes;
list->count = i+1; list->count = i+1;
zlib->idat->idat_list_tail = list; zlib->idat->idat_list_tail = list;
/* FALL THROUGH */ /* FALLTHROUGH */
default: default:
return rc; return rc;
@ -2673,7 +2672,7 @@ zlib_check(struct file *file, png_uint_32 offset)
/* Truncated stream; unrecoverable, gets converted to ZLIB_FATAL */ /* Truncated stream; unrecoverable, gets converted to ZLIB_FATAL */
zlib.z.msg = PNGZ_MSG_CAST("[truncated]"); zlib.z.msg = PNGZ_MSG_CAST("[truncated]");
zlib_message(&zlib, 0/*expected*/); zlib_message(&zlib, 0/*expected*/);
/* FALL THROUGH */ /* FALLTHROUGH */
default: default:
/* Unrecoverable error; skip the chunk; a zlib_message has already /* Unrecoverable error; skip the chunk; a zlib_message has already
@ -3341,7 +3340,7 @@ read_callback(png_structp png_ptr, png_bytep buffer, size_t count)
if (file->state != STATE_IDAT && length > 0) if (file->state != STATE_IDAT && length > 0)
setpos(chunk); setpos(chunk);
} }
/* FALL THROUGH */ /* FALLTHROUGH */
default: default:
assert(chunk != NULL); assert(chunk != NULL);

4
example.c
View File

@ -114,13 +114,13 @@ int main(int argc, const char **argv)
else else
{ {
/* Calling png_free_image is optional unless the simplified API was /* Calling png_image_free is optional unless the simplified API was
* not run to completion. In this case if there wasn't enough * not run to completion. In this case if there wasn't enough
* memory for 'buffer' we didn't complete the read, so we must free * memory for 'buffer' we didn't complete the read, so we must free
* the image: * the image:
*/ */
if (buffer == NULL) if (buffer == NULL)
png_free_image(&image); png_image_free(&image);
else else
free(buffer); free(buffer);

110
intel/filter_sse2_intrinsics.c
View File

@ -5,7 +5,7 @@
* Written by Mike Klein and Matt Sarett * Written by Mike Klein and Matt Sarett
* Derived from arm/filter_neon_intrinsics.c * Derived from arm/filter_neon_intrinsics.c
* *
* Last changed in libpng 1.6.29 [March 16, 2017] * Last changed in libpng 1.6.31 [July 27, 2017]
* *
* 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
@ -40,7 +40,7 @@ static __m128i load3(const void* p) {
/* We'll load 2 bytes, then 1 byte, /* We'll load 2 bytes, then 1 byte,
* then mask them together, and finally load into SSE. * then mask them together, and finally load into SSE.
*/ */
const png_uint_16* p01 = p; const png_uint_16* p01 = (png_const_uint_16p)p;
const png_byte* p2 = (const png_byte*)(p01+1); const png_byte* p2 = (const png_byte*)(p01+1);
png_uint_32 v012 = (png_uint_32)(*p01) png_uint_32 v012 = (png_uint_32)(*p01)
@ -53,12 +53,15 @@ static void store3(void* p, __m128i v) {
* its bottom two bytes, then its third byte. * its bottom two bytes, then its third byte.
*/ */
png_uint_32 v012; png_uint_32 v012;
png_uint_16* p01;
png_byte* p2;
store4(&v012, v); store4(&v012, v);
png_uint_16* p01 = p; p01 = (png_uint_16p)p;
png_byte* p2 = (png_byte*)(p01+1); p2 = (png_byte*)(p01+1);
*p01 = v012; *p01 = (png_uint_16)v012;
*p2 = v012 >> 16; *p2 = (png_byte)(v012 >> 16);
} }
void png_read_filter_row_sub3_sse2(png_row_infop row_info, png_bytep row, void png_read_filter_row_sub3_sse2(png_row_infop row_info, png_bytep row,
@ -68,10 +71,13 @@ void png_read_filter_row_sub3_sse2(png_row_infop row_info, png_bytep row,
* There is no pixel to the left of the first pixel. It's encoded directly. * There is no pixel to the left of the first pixel. It's encoded directly.
* That works with our main loop if we just say that left pixel was zero. * That works with our main loop if we just say that left pixel was zero.
*/ */
png_debug(1, "in png_read_filter_row_sub3_sse2"); png_size_t rb;
__m128i a, d = _mm_setzero_si128(); __m128i a, d = _mm_setzero_si128();
int rb = row_info->rowbytes; png_debug(1, "in png_read_filter_row_sub3_sse2");
rb = row_info->rowbytes;
while (rb >= 4) { while (rb >= 4) {
a = d; d = load4(row); a = d; d = load4(row);
d = _mm_add_epi8(d, a); d = _mm_add_epi8(d, a);
@ -88,6 +94,7 @@ void png_read_filter_row_sub3_sse2(png_row_infop row_info, png_bytep row,
row += 3; row += 3;
rb -= 3; rb -= 3;
} }
PNG_UNUSED(prev)
} }
void png_read_filter_row_sub4_sse2(png_row_infop row_info, png_bytep row, void png_read_filter_row_sub4_sse2(png_row_infop row_info, png_bytep row,
@ -97,11 +104,14 @@ void png_read_filter_row_sub4_sse2(png_row_infop row_info, png_bytep row,
* There is no pixel to the left of the first pixel. It's encoded directly. * There is no pixel to the left of the first pixel. It's encoded directly.
* That works with our main loop if we just say that left pixel was zero. * That works with our main loop if we just say that left pixel was zero.
*/ */
png_debug(1, "in png_read_filter_row_sub4_sse2"); png_size_t rb;
__m128i a, d = _mm_setzero_si128(); __m128i a, d = _mm_setzero_si128();
int rb = row_info->rowbytes; png_debug(1, "in png_read_filter_row_sub4_sse2");
while (rb > 0) {
rb = row_info->rowbytes+4;
while (rb > 4) {
a = d; d = load4(row); a = d; d = load4(row);
d = _mm_add_epi8(d, a); d = _mm_add_epi8(d, a);
store4(row, d); store4(row, d);
@ -109,6 +119,7 @@ void png_read_filter_row_sub4_sse2(png_row_infop row_info, png_bytep row,
row += 4; row += 4;
rb -= 4; rb -= 4;
} }
PNG_UNUSED(prev)
} }
void png_read_filter_row_avg3_sse2(png_row_infop row_info, png_bytep row, void png_read_filter_row_avg3_sse2(png_row_infop row_info, png_bytep row,
@ -119,18 +130,23 @@ void png_read_filter_row_avg3_sse2(png_row_infop row_info, png_bytep row,
* predicted to be half of the pixel above it. So again, this works * predicted to be half of the pixel above it. So again, this works
* perfectly with our loop if we make sure a starts at zero. * perfectly with our loop if we make sure a starts at zero.
*/ */
png_debug(1, "in png_read_filter_row_avg3_sse2");
png_size_t rb;
const __m128i zero = _mm_setzero_si128(); const __m128i zero = _mm_setzero_si128();
__m128i b; __m128i b;
__m128i a, d = zero; __m128i a, d = zero;
int rb = row_info->rowbytes; png_debug(1, "in png_read_filter_row_avg3_sse2");
rb = row_info->rowbytes;
while (rb >= 4) { while (rb >= 4) {
__m128i avg;
b = load4(prev); b = load4(prev);
a = d; d = load4(row ); a = d; d = load4(row );
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */ /* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */
__m128i avg = _mm_avg_epu8(a,b); avg = _mm_avg_epu8(a,b);
/* ...but we can fix it up by subtracting off 1 if it rounded up. */ /* ...but we can fix it up by subtracting off 1 if it rounded up. */
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b), avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b),
_mm_set1_epi8(1))); _mm_set1_epi8(1)));
@ -142,11 +158,12 @@ void png_read_filter_row_avg3_sse2(png_row_infop row_info, png_bytep row,
rb -= 3; rb -= 3;
} }
if (rb > 0) { if (rb > 0) {
__m128i avg;
b = load3(prev); b = load3(prev);
a = d; d = load3(row ); a = d; d = load3(row );
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */ /* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */
__m128i avg = _mm_avg_epu8(a,b); avg = _mm_avg_epu8(a,b);
/* ...but we can fix it up by subtracting off 1 if it rounded up. */ /* ...but we can fix it up by subtracting off 1 if it rounded up. */
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b), avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b),
_mm_set1_epi8(1))); _mm_set1_epi8(1)));
@ -168,18 +185,21 @@ void png_read_filter_row_avg4_sse2(png_row_infop row_info, png_bytep row,
* predicted to be half of the pixel above it. So again, this works * predicted to be half of the pixel above it. So again, this works
* perfectly with our loop if we make sure a starts at zero. * perfectly with our loop if we make sure a starts at zero.
*/ */
png_debug(1, "in png_read_filter_row_avg4_sse2"); png_size_t rb;
const __m128i zero = _mm_setzero_si128(); const __m128i zero = _mm_setzero_si128();
__m128i b; __m128i b;
__m128i a, d = zero; __m128i a, d = zero;
int rb = row_info->rowbytes; png_debug(1, "in png_read_filter_row_avg4_sse2");
while (rb > 0) {
rb = row_info->rowbytes+4;
while (rb > 4) {
__m128i avg;
b = load4(prev); b = load4(prev);
a = d; d = load4(row ); a = d; d = load4(row );
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */ /* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */
__m128i avg = _mm_avg_epu8(a,b); avg = _mm_avg_epu8(a,b);
/* ...but we can fix it up by subtracting off 1 if it rounded up. */ /* ...but we can fix it up by subtracting off 1 if it rounded up. */
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b), avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b),
_mm_set1_epi8(1))); _mm_set1_epi8(1)));
@ -237,38 +257,42 @@ void png_read_filter_row_paeth3_sse2(png_row_infop row_info, png_bytep row,
* Here we zero b and d, which become c and a respectively at the start of * Here we zero b and d, which become c and a respectively at the start of
* the loop. * the loop.
*/ */
png_debug(1, "in png_read_filter_row_paeth3_sse2"); png_size_t rb;
const __m128i zero = _mm_setzero_si128(); const __m128i zero = _mm_setzero_si128();
__m128i c, b = zero, __m128i c, b = zero,
a, d = zero; a, d = zero;
int rb = row_info->rowbytes; png_debug(1, "in png_read_filter_row_paeth3_sse2");
rb = row_info->rowbytes;
while (rb >= 4) { while (rb >= 4) {
/* It's easiest to do this math (particularly, deal with pc) with 16-bit /* It's easiest to do this math (particularly, deal with pc) with 16-bit
* intermediates. * intermediates.
*/ */
__m128i pa,pb,pc,smallest,nearest;
c = b; b = _mm_unpacklo_epi8(load4(prev), zero); c = b; b = _mm_unpacklo_epi8(load4(prev), zero);
a = d; d = _mm_unpacklo_epi8(load4(row ), zero); a = d; d = _mm_unpacklo_epi8(load4(row ), zero);
/* (p-a) == (a+b-c - a) == (b-c) */ /* (p-a) == (a+b-c - a) == (b-c) */
__m128i pa = _mm_sub_epi16(b,c);
pa = _mm_sub_epi16(b,c);
/* (p-b) == (a+b-c - b) == (a-c) */ /* (p-b) == (a+b-c - b) == (a-c) */
__m128i pb = _mm_sub_epi16(a,c); pb = _mm_sub_epi16(a,c);
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */ /* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */
__m128i pc = _mm_add_epi16(pa,pb); pc = _mm_add_epi16(pa,pb);
pa = abs_i16(pa); /* |p-a| */ pa = abs_i16(pa); /* |p-a| */
pb = abs_i16(pb); /* |p-b| */ pb = abs_i16(pb); /* |p-b| */
pc = abs_i16(pc); /* |p-c| */ pc = abs_i16(pc); /* |p-c| */
__m128i smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb)); smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
/* Paeth breaks ties favoring a over b over c. */ /* Paeth breaks ties favoring a over b over c. */
__m128i nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a, nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
if_then_else(_mm_cmpeq_epi16(smallest, pb), b, if_then_else(_mm_cmpeq_epi16(smallest, pb), b,
c)); c));
/* Note `_epi8`: we need addition to wrap modulo 255. */ /* Note `_epi8`: we need addition to wrap modulo 255. */
d = _mm_add_epi8(d, nearest); d = _mm_add_epi8(d, nearest);
@ -282,26 +306,27 @@ void png_read_filter_row_paeth3_sse2(png_row_infop row_info, png_bytep row,
/* It's easiest to do this math (particularly, deal with pc) with 16-bit /* It's easiest to do this math (particularly, deal with pc) with 16-bit
* intermediates. * intermediates.
*/ */
__m128i pa,pb,pc,smallest,nearest;
c = b; b = _mm_unpacklo_epi8(load3(prev), zero); c = b; b = _mm_unpacklo_epi8(load3(prev), zero);
a = d; d = _mm_unpacklo_epi8(load3(row ), zero); a = d; d = _mm_unpacklo_epi8(load3(row ), zero);
/* (p-a) == (a+b-c - a) == (b-c) */ /* (p-a) == (a+b-c - a) == (b-c) */
__m128i pa = _mm_sub_epi16(b,c); pa = _mm_sub_epi16(b,c);
/* (p-b) == (a+b-c - b) == (a-c) */ /* (p-b) == (a+b-c - b) == (a-c) */
__m128i pb = _mm_sub_epi16(a,c); pb = _mm_sub_epi16(a,c);
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */ /* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */
__m128i pc = _mm_add_epi16(pa,pb); pc = _mm_add_epi16(pa,pb);
pa = abs_i16(pa); /* |p-a| */ pa = abs_i16(pa); /* |p-a| */
pb = abs_i16(pb); /* |p-b| */ pb = abs_i16(pb); /* |p-b| */
pc = abs_i16(pc); /* |p-c| */ pc = abs_i16(pc); /* |p-c| */
__m128i smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb)); smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
/* Paeth breaks ties favoring a over b over c. */ /* Paeth breaks ties favoring a over b over c. */
__m128i nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a, nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
if_then_else(_mm_cmpeq_epi16(smallest, pb), b, if_then_else(_mm_cmpeq_epi16(smallest, pb), b,
c)); c));
@ -331,13 +356,16 @@ void png_read_filter_row_paeth4_sse2(png_row_infop row_info, png_bytep row,
* Here we zero b and d, which become c and a respectively at the start of * Here we zero b and d, which become c and a respectively at the start of
* the loop. * the loop.
*/ */
png_debug(1, "in png_read_filter_row_paeth4_sse2"); png_size_t rb;
const __m128i zero = _mm_setzero_si128(); const __m128i zero = _mm_setzero_si128();
__m128i pa,pb,pc,smallest,nearest;
__m128i c, b = zero, __m128i c, b = zero,
a, d = zero; a, d = zero;
int rb = row_info->rowbytes; png_debug(1, "in png_read_filter_row_paeth4_sse2");
while (rb > 0) {
rb = row_info->rowbytes+4;
while (rb > 4) {
/* It's easiest to do this math (particularly, deal with pc) with 16-bit /* It's easiest to do this math (particularly, deal with pc) with 16-bit
* intermediates. * intermediates.
*/ */
@ -345,22 +373,22 @@ void png_read_filter_row_paeth4_sse2(png_row_infop row_info, png_bytep row,
a = d; d = _mm_unpacklo_epi8(load4(row ), zero); a = d; d = _mm_unpacklo_epi8(load4(row ), zero);
/* (p-a) == (a+b-c - a) == (b-c) */ /* (p-a) == (a+b-c - a) == (b-c) */
__m128i pa = _mm_sub_epi16(b,c); pa = _mm_sub_epi16(b,c);
/* (p-b) == (a+b-c - b) == (a-c) */ /* (p-b) == (a+b-c - b) == (a-c) */
__m128i pb = _mm_sub_epi16(a,c); pb = _mm_sub_epi16(a,c);
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */ /* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */
__m128i pc = _mm_add_epi16(pa,pb); pc = _mm_add_epi16(pa,pb);
pa = abs_i16(pa); /* |p-a| */ pa = abs_i16(pa); /* |p-a| */
pb = abs_i16(pb); /* |p-b| */ pb = abs_i16(pb); /* |p-b| */
pc = abs_i16(pc); /* |p-c| */ pc = abs_i16(pc); /* |p-c| */
__m128i smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb)); smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
/* Paeth breaks ties favoring a over b over c. */ /* Paeth breaks ties favoring a over b over c. */
__m128i nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a, nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
if_then_else(_mm_cmpeq_epi16(smallest, pb), b, if_then_else(_mm_cmpeq_epi16(smallest, pb), b,
c)); c));

27
libpng-manual.txt
View File

@ -1,6 +1,6 @@
libpng-manual.txt - A description on how to use and modify libpng libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.6.30 - June 28, 2017 libpng version 1.6.31 - July 27, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net> <glennrp at users.sourceforge.net>
Copyright (c) 1998-2017 Glenn Randers-Pehrson Copyright (c) 1998-2017 Glenn Randers-Pehrson
@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on: Based on:
libpng versions 0.97, January 1998, through 1.6.30 - June 28, 2017 libpng versions 0.97, January 1998, through 1.6.31 - July 27, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2017 Glenn Randers-Pehrson Copyright (c) 1998-2017 Glenn Randers-Pehrson
@ -1330,6 +1330,11 @@ in until png_read_end() has read the chunk data following the image.
rowbytes = png_get_rowbytes(png_ptr, info_ptr); rowbytes = png_get_rowbytes(png_ptr, info_ptr);
rowbytes - number of bytes needed to hold a row rowbytes - number of bytes needed to hold a row
This value, the bit_depth, color_type,
and the number of channels can change
if you use transforms such as
png_set_expand(). See
png_read_update_info(), below.
signature = png_get_signature(png_ptr, info_ptr); signature = png_get_signature(png_ptr, info_ptr);
@ -1448,6 +1453,11 @@ png_set_rgb_to_gray()).
the single transparent color for the single transparent color for
non-paletted images (PNG_INFO_tRNS) non-paletted images (PNG_INFO_tRNS)
png_get_eXIf(png_ptr, info_ptr, &exif);
(PNG_INFO_eXIf)
exif - Exif profile (array of png_byte)
png_get_hIST(png_ptr, info_ptr, &hist); png_get_hIST(png_ptr, info_ptr, &hist);
(PNG_INFO_hIST) (PNG_INFO_hIST)
@ -2493,6 +2503,7 @@ your application instead of by libpng, you can use
PNG_INFO_gAMA, PNG_INFO_sBIT, PNG_INFO_gAMA, PNG_INFO_sBIT,
PNG_INFO_cHRM, PNG_INFO_PLTE, PNG_INFO_cHRM, PNG_INFO_PLTE,
PNG_INFO_tRNS, PNG_INFO_bKGD, PNG_INFO_tRNS, PNG_INFO_bKGD,
PNG_INFO_eXIf,
PNG_INFO_hIST, PNG_INFO_pHYs, PNG_INFO_hIST, PNG_INFO_pHYs,
PNG_INFO_oFFs, PNG_INFO_tIME, PNG_INFO_oFFs, PNG_INFO_tIME,
PNG_INFO_pCAL, PNG_INFO_sRGB, PNG_INFO_pCAL, PNG_INFO_sRGB,
@ -3092,6 +3103,11 @@ width, height, bit_depth, and color_type must be the same in each call.
single transparent color for single transparent color for
non-paletted images (PNG_INFO_tRNS) non-paletted images (PNG_INFO_tRNS)
png_set_eXIf(png_ptr, info_ptr, exif);
hist - Exif profile (array of
png_byte) (PNG_INFO_eXIf)
png_set_hIST(png_ptr, info_ptr, hist); png_set_hIST(png_ptr, info_ptr, hist);
hist - histogram of palette (array of hist - histogram of palette (array of
@ -5200,6 +5216,11 @@ is an error. Previously this requirement of the PNG specification was not
enforced, and the palette was always limited to 256 entries. An over-length enforced, and the palette was always limited to 256 entries. An over-length
PLTE chunk found in an input PNG is silently truncated. PLTE chunk found in an input PNG is silently truncated.
Starting with libpng-1.6.31, the eXIf chunk is supported. Libpng does not
attempt to decode the Exif profile; it simply returns a byte array
containing the profile to the calling application which must do its own
decoding.
XIII. Detecting libpng XIII. Detecting libpng
The png_get_io_ptr() function has been present since libpng-0.88, has never The png_get_io_ptr() function has been present since libpng-0.88, has never
@ -5383,7 +5404,7 @@ Since the PNG Development group is an ad-hoc body, we can't make
an official declaration. an official declaration.
This is your unofficial assurance that libpng from version 0.71 and This is your unofficial assurance that libpng from version 0.71 and
upward through 1.6.30 are Y2K compliant. It is my belief that earlier upward through 1.6.31 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant. 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

43
libpng.3
View File

@ -1,6 +1,6 @@
.TH LIBPNG 3 "June 28, 2017" .TH LIBPNG 3 "July 27, 2017"
.SH NAME .SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.6.30 libpng \- Portable Network Graphics (PNG) Reference Library 1.6.31
.SH SYNOPSIS .SH SYNOPSIS
\fB \fB
#include <png.h>\fP #include <png.h>\fP
@ -97,6 +97,8 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.6.30
\fBpng_byte png_get_header_version (png_const_structp \fIpng_ptr\fP\fB);\fP \fBpng_byte png_get_header_version (png_const_structp \fIpng_ptr\fP\fB);\fP
\fBpng_uint_32 png_get_eXIf (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fI*exif\fP\fB);\fP
\fBpng_uint_32 png_get_hIST (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fI*hist\fP\fB);\fP \fBpng_uint_32 png_get_hIST (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fI*hist\fP\fB);\fP
\fBpng_uint_32 png_get_iCCP (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_charpp \fP\fIname\fP\fB, int \fP\fI*compression_type\fP\fB, png_bytepp \fP\fIprofile\fP\fB, png_uint_32 \fI*proflen\fP\fB);\fP \fBpng_uint_32 png_get_iCCP (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_charpp \fP\fIname\fP\fB, int \fP\fI*compression_type\fP\fB, png_bytepp \fP\fIprofile\fP\fB, png_uint_32 \fI*proflen\fP\fB);\fP
@ -347,6 +349,8 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.6.30
\fBvoid png_set_gray_to_rgb (png_structp \fIpng_ptr\fP\fB);\fP \fBvoid png_set_gray_to_rgb (png_structp \fIpng_ptr\fP\fB);\fP
\fBvoid png_set_eXIf (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_bytep \fIexif\fP\fB);\fP
\fBvoid png_set_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fIhist\fP\fB);\fP \fBvoid png_set_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_16p \fIhist\fP\fB);\fP
\fBvoid png_set_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_const_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_const_bytep \fP\fIprofile\fP\fB, png_uint_32 \fIproflen\fP\fB);\fP \fBvoid png_set_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_const_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_const_bytep \fP\fIprofile\fP\fB, png_uint_32 \fIproflen\fP\fB);\fP
@ -510,7 +514,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
.SH LIBPNG.TXT .SH LIBPNG.TXT
libpng-manual.txt - A description on how to use and modify libpng libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.6.30 - June 28, 2017 libpng version 1.6.31 - July 27, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net> <glennrp at users.sourceforge.net>
Copyright (c) 1998-2017 Glenn Randers-Pehrson Copyright (c) 1998-2017 Glenn Randers-Pehrson
@ -521,7 +525,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on: Based on:
libpng versions 0.97, January 1998, through 1.6.30 - June 28, 2017 libpng versions 0.97, January 1998, through 1.6.31 - July 27, 2017
Updated and distributed by Glenn Randers-Pehrson Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2017 Glenn Randers-Pehrson Copyright (c) 1998-2017 Glenn Randers-Pehrson
@ -1840,6 +1844,11 @@ in until png_read_end() has read the chunk data following the image.
rowbytes = png_get_rowbytes(png_ptr, info_ptr); rowbytes = png_get_rowbytes(png_ptr, info_ptr);
rowbytes - number of bytes needed to hold a row rowbytes - number of bytes needed to hold a row
This value, the bit_depth, color_type,
and the number of channels can change
if you use transforms such as
png_set_expand(). See
png_read_update_info(), below.
signature = png_get_signature(png_ptr, info_ptr); signature = png_get_signature(png_ptr, info_ptr);
@ -1958,6 +1967,11 @@ png_set_rgb_to_gray()).
the single transparent color for the single transparent color for
non-paletted images (PNG_INFO_tRNS) non-paletted images (PNG_INFO_tRNS)
png_get_eXIf(png_ptr, info_ptr, &exif);
(PNG_INFO_eXIf)
exif - Exif profile (array of png_byte)
png_get_hIST(png_ptr, info_ptr, &hist); png_get_hIST(png_ptr, info_ptr, &hist);
(PNG_INFO_hIST) (PNG_INFO_hIST)
@ -3003,6 +3017,7 @@ your application instead of by libpng, you can use
PNG_INFO_gAMA, PNG_INFO_sBIT, PNG_INFO_gAMA, PNG_INFO_sBIT,
PNG_INFO_cHRM, PNG_INFO_PLTE, PNG_INFO_cHRM, PNG_INFO_PLTE,
PNG_INFO_tRNS, PNG_INFO_bKGD, PNG_INFO_tRNS, PNG_INFO_bKGD,
PNG_INFO_eXIf,
PNG_INFO_hIST, PNG_INFO_pHYs, PNG_INFO_hIST, PNG_INFO_pHYs,
PNG_INFO_oFFs, PNG_INFO_tIME, PNG_INFO_oFFs, PNG_INFO_tIME,
PNG_INFO_pCAL, PNG_INFO_sRGB, PNG_INFO_pCAL, PNG_INFO_sRGB,
@ -3602,6 +3617,11 @@ width, height, bit_depth, and color_type must be the same in each call.
single transparent color for single transparent color for
non-paletted images (PNG_INFO_tRNS) non-paletted images (PNG_INFO_tRNS)
png_set_eXIf(png_ptr, info_ptr, exif);
hist - Exif profile (array of
png_byte) (PNG_INFO_eXIf)
png_set_hIST(png_ptr, info_ptr, hist); png_set_hIST(png_ptr, info_ptr, hist);
hist - histogram of palette (array of hist - histogram of palette (array of
@ -5710,6 +5730,11 @@ is an error. Previously this requirement of the PNG specification was not
enforced, and the palette was always limited to 256 entries. An over-length enforced, and the palette was always limited to 256 entries. An over-length
PLTE chunk found in an input PNG is silently truncated. PLTE chunk found in an input PNG is silently truncated.
Starting with libpng-1.6.31, the eXIf chunk is supported. Libpng does not
attempt to decode the Exif profile; it simply returns a byte array
containing the profile to the calling application which must do its own
decoding.
.SH XIII. Detecting libpng .SH XIII. Detecting libpng
The png_get_io_ptr() function has been present since libpng-0.88, has never The png_get_io_ptr() function has been present since libpng-0.88, has never
@ -5893,7 +5918,7 @@ Since the PNG Development group is an ad-hoc body, we can't make
an official declaration. an official declaration.
This is your unofficial assurance that libpng from version 0.71 and This is your unofficial assurance that libpng from version 0.71 and
upward through 1.6.30 are Y2K compliant. It is my belief that earlier upward through 1.6.31 are Y2K compliant. It is my belief that earlier
versions were also Y2K compliant. 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
@ -5995,7 +6020,7 @@ the first widely used release:
... ...
1.5.28 15 10528 15.so.15.28[.0] 1.5.28 15 10528 15.so.15.28[.0]
... ...
1.6.30 16 10630 16.so.16.30[.0] 1.6.31 16 10631 16.so.16.31[.0]
Henceforth the source version will match the shared-library minor Henceforth the source version will match the shared-library minor
and patch numbers; the shared-library major version number will be and patch numbers; the shared-library major version number will be
@ -6051,7 +6076,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation. Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.6.30 - June 28, 2017: Libpng version 1.6.31 - July 27, 2017:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc. Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net). Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@ -6076,7 +6101,7 @@ this sentence.
This code is released under the libpng license. This code is released under the libpng license.
libpng versions 1.0.7, July 1, 2000 through 1.6.30, June 28, 2017 are libpng versions 1.0.7, July 1, 2000 through 1.6.31, July 27, 2017 are
Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
derived from libpng-1.0.6, and are distributed according to the same 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 disclaimer and license as libpng-1.0.6 with the following individuals
@ -6204,7 +6229,7 @@ files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
Glenn Randers-Pehrson Glenn Randers-Pehrson
glennrp at users.sourceforge.net glennrp at users.sourceforge.net
June 28, 2017 July 27, 2017
.\" end of man page .\" end of man page

1
libpng.pc.in
View File

@ -6,6 +6,7 @@ includedir=@includedir@/libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@
Name: libpng Name: libpng
Description: Loads and saves PNG files Description: Loads and saves PNG files
Version: @PNGLIB_VERSION@ Version: @PNGLIB_VERSION@
Requires: zlib
Libs: -L${libdir} -lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ Libs: -L${libdir} -lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@
Libs.private: @LIBS@ Libs.private: @LIBS@
Cflags: -I${includedir} Cflags: -I${includedir}

2
libpngpf.3
View File

@ -1,6 +1,6 @@
.TH LIBPNGPF 3 "April 1, 2017" .TH LIBPNGPF 3 "April 1, 2017"
.SH NAME .SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.6.30 libpng \- Portable Network Graphics (PNG) Reference Library 1.6.31
(private functions) (private functions)
.SH SYNOPSIS .SH SYNOPSIS
\fB\fB#include \fI\fI"pngpriv.h" \fB\fB#include \fI\fI"pngpriv.h"

71
png.c
View File

@ -1,7 +1,7 @@
/* png.c - location for general purpose libpng functions /* png.c - location for general purpose libpng functions
* *
* Last changed in libpng 1.6.30 [(PENDING RELEASE)] * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2017 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 +14,27 @@
#include "pngpriv.h" #include "pngpriv.h"
/* Generate a compiler error if there is an old png.h in the search path. */ /* Generate a compiler error if there is an old png.h in the search path. */
typedef png_libpng_version_1_6_30 Your_png_h_is_not_version_1_6_30; typedef png_libpng_version_1_6_31 Your_png_h_is_not_version_1_6_31;
#ifdef __GNUC__
/* The version tests may need to be added to, but the problem warning has
* consistently been fixed in GCC versions which obtain wide-spread release.
* The problem is that many versions of GCC rearrange comparison expressions in
* the optimizer in such a way that the results of the comparison will change
* if signed integer overflow occurs. Such comparisons are not permitted in
* ANSI C90, however GCC isn't clever enough to work out that that do not occur
* below in png_ascii_from_fp and png_muldiv, so it produces a warning with
* -Wextra. Unfortunately this is highly dependent on the optimizer and the
* machine architecture so the warning comes and goes unpredictably and is
* impossible to "fix", even were that a good idea.
*/
#if __GNUC__ == 7 && __GNUC_MINOR__ == 1
#define GCC_STRICT_OVERFLOW 1
#endif /* GNU 7.1.x */
#endif /* GNU */
#ifndef GCC_STRICT_OVERFLOW
#define GCC_STRICT_OVERFLOW 0
#endif
/* 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
@ -595,6 +615,16 @@ png_free_data(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 mask,
} }
#endif #endif
#ifdef PNG_eXIf_SUPPORTED
/* Free any eXIf entry */
if (((mask & PNG_FREE_EXIF) & info_ptr->free_me) != 0)
{
png_free(png_ptr, info_ptr->exif);
info_ptr->exif = NULL;
info_ptr->valid &= ~PNG_INFO_eXIf;
}
#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) != 0) if (((mask & PNG_FREE_HIST) & info_ptr->free_me) != 0)
@ -776,14 +806,14 @@ png_get_copyright(png_const_structrp png_ptr)
#else #else
# ifdef __STDC__ # ifdef __STDC__
return PNG_STRING_NEWLINE \ return PNG_STRING_NEWLINE \
"libpng version 1.6.30 - June 28, 2017" PNG_STRING_NEWLINE \ "libpng version 1.6.31 - July 27, 2017" PNG_STRING_NEWLINE \
"Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson" \ "Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson" \
PNG_STRING_NEWLINE \ PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE; PNG_STRING_NEWLINE;
# else # else
return "libpng version 1.6.30 - June 28, 2017\ return "libpng version 1.6.31 - July 27, 2017\
Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson\ Copyright (c) 1998-2002,2004,2006-2017 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.";
@ -2857,6 +2887,14 @@ png_pow10(int power)
/* Function to format a floating point value in ASCII with a given /* Function to format a floating point value in ASCII with a given
* precision. * precision.
*/ */
#if GCC_STRICT_OVERFLOW
#pragma GCC diagnostic push
/* The problem arises below with exp_b10, which can never overflow because it
* comes, originally, from frexp and is therefore limited to a range which is
* typically +/-710 (log2(DBL_MAX)/log2(DBL_MIN)).
*/
#pragma GCC diagnostic warning "-Wstrict-overflow=2"
#endif /* GCC_STRICT_OVERFLOW */
void /* PRIVATE */ void /* PRIVATE */
png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size, png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
double fp, unsigned int precision) double fp, unsigned int precision)
@ -2946,7 +2984,7 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
*/ */
if (exp_b10 < 0 && exp_b10 > -3) /* PLUS 3 TOTAL 4 */ if (exp_b10 < 0 && exp_b10 > -3) /* PLUS 3 TOTAL 4 */
{ {
czero = (unsigned int)(-exp_b10); /* PLUS 2 digits: TOTAL 3 */ czero = 0U-exp_b10; /* PLUS 2 digits: TOTAL 3 */
exp_b10 = 0; /* Dot added below before first output. */ exp_b10 = 0; /* Dot added below before first output. */
} }
else else
@ -3087,7 +3125,7 @@ png_ascii_from_fp(png_const_structrp 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 a flag - it got
* to '-1' because of the decrement after outputting * 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!)
@ -3101,7 +3139,7 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
* zeros were *not* output, so this doesn't increase * zeros were *not* output, so this doesn't increase
* the output count. * the output count.
*/ */
while (--exp_b10 >= 0) *ascii++ = 48; while (exp_b10-- > 0) *ascii++ = 48;
*ascii = 0; *ascii = 0;
@ -3131,11 +3169,11 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
if (exp_b10 < 0) if (exp_b10 < 0)
{ {
*ascii++ = 45; --size; /* '-': PLUS 1 TOTAL 3+precision */ *ascii++ = 45; --size; /* '-': PLUS 1 TOTAL 3+precision */
uexp_b10 = (unsigned int)(-exp_b10); uexp_b10 = 0U-exp_b10;
} }
else else
uexp_b10 = (unsigned int)exp_b10; uexp_b10 = 0U+exp_b10;
cdigits = 0; cdigits = 0;
@ -3178,6 +3216,9 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, png_size_t size,
/* Here on buffer too small. */ /* Here on buffer too small. */
png_error(png_ptr, "ASCII conversion buffer too small"); png_error(png_ptr, "ASCII conversion buffer too small");
} }
#if GCC_STRICT_OVERFLOW
#pragma GCC diagnostic pop
#endif /* GCC_STRICT_OVERFLOW */
# endif /* FLOATING_POINT */ # endif /* FLOATING_POINT */
@ -3291,6 +3332,15 @@ png_fixed(png_const_structrp png_ptr, double fp, png_const_charp text)
* the nearest .00001). Overflow and divide by zero are signalled in * the nearest .00001). Overflow and divide by zero are signalled in
* the result, a boolean - true on success, false on overflow. * the result, a boolean - true on success, false on overflow.
*/ */
#if GCC_STRICT_OVERFLOW /* from above */
/* It is not obvious which comparison below gets optimized in such a way that
* signed overflow would change the result; looking through the code does not
* reveal any tests which have the form GCC complains about, so presumably the
* optimizer is moving an add or subtract into the 'if' somewhere.
*/
#pragma GCC diagnostic push
#pragma GCC diagnostic warning "-Wstrict-overflow=2"
#endif /* GCC_STRICT_OVERFLOW */
int int
png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times, png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times,
png_int_32 divisor) png_int_32 divisor)
@ -3405,6 +3455,9 @@ png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times,
return 0; return 0;
} }
#if GCC_STRICT_OVERFLOW
#pragma GCC diagnostic pop
#endif /* GCC_STRICT_OVERFLOW */
#endif /* READ_GAMMA || INCH_CONVERSIONS */ #endif /* READ_GAMMA || INCH_CONVERSIONS */
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED) #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED)

38
png.h
View File

@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library /* png.h - header file for PNG reference library
* *
* libpng version 1.6.30, June 28, 2017 * libpng version 1.6.31, July 27, 2017
* *
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@ -12,7 +12,7 @@
* 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 0.89, June 1996, through 0.96, May 1997: Andreas Dilger * libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.6.30, June 28, 2017: * libpng versions 0.97, January 1998, through 1.6.31, July 27, 2017:
* Glenn Randers-Pehrson. * Glenn Randers-Pehrson.
* See also "Contributing Authors", below. * See also "Contributing Authors", below.
*/ */
@ -25,7 +25,7 @@
* *
* This code is released under the libpng license. * This code is released under the libpng license.
* *
* libpng versions 1.0.7, July 1, 2000 through 1.6.30, June 28, 2017 are * libpng versions 1.0.7, July 1, 2000 through 1.6.31, July 27, 2017 are
* Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are * Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
* derived from libpng-1.0.6, and are distributed according to the same * 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 * disclaimer and license as libpng-1.0.6 with the following individuals
@ -213,7 +213,7 @@
* ... * ...
* 1.5.28 15 10527 15.so.15.28[.0] * 1.5.28 15 10527 15.so.15.28[.0]
* ... * ...
* 1.6.30 16 10630 16.so.16.30[.0] * 1.6.31 16 10631 16.so.16.31[.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
@ -241,13 +241,13 @@
* Y2K compliance in libpng: * Y2K compliance in libpng:
* ========================= * =========================
* *
* June 28, 2017 * July 27, 2017
* *
* Since the PNG Development group is an ad-hoc body, we can't make * Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration. * an official declaration.
* *
* This is your unofficial assurance that libpng from version 0.71 and * This is your unofficial assurance that libpng from version 0.71 and
* upward through 1.6.30 are Y2K compliant. It is my belief that * upward through 1.6.31 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
@ -309,8 +309,8 @@
*/ */
/* Version information for png.h - this should match the version in png.c */ /* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.6.30" #define PNG_LIBPNG_VER_STRING "1.6.31"
#define PNG_HEADER_VERSION_STRING " libpng version 1.6.30 - June 28, 2017\n" #define PNG_HEADER_VERSION_STRING " libpng version 1.6.31 - July 27, 2017\n"
#define PNG_LIBPNG_VER_SONUM 16 #define PNG_LIBPNG_VER_SONUM 16
#define PNG_LIBPNG_VER_DLLNUM 16 #define PNG_LIBPNG_VER_DLLNUM 16
@ -318,7 +318,7 @@
/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */ /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
#define PNG_LIBPNG_VER_MAJOR 1 #define PNG_LIBPNG_VER_MAJOR 1
#define PNG_LIBPNG_VER_MINOR 6 #define PNG_LIBPNG_VER_MINOR 6
#define PNG_LIBPNG_VER_RELEASE 30 #define PNG_LIBPNG_VER_RELEASE 31
/* 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:
@ -349,7 +349,7 @@
* 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 10630 /* 1.6.30 */ #define PNG_LIBPNG_VER 10631 /* 1.6.31 */
/* 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.
@ -459,7 +459,7 @@ extern "C" {
/* This triggers a compiler error in png.c, if png.c and png.h /* This triggers a compiler error in png.c, if png.c and png.h
* do not agree upon the version number. * do not agree upon the version number.
*/ */
typedef char* png_libpng_version_1_6_30; typedef char* png_libpng_version_1_6_31;
/* Basic control structions. Read libpng-manual.txt or libpng.3 for more info. /* Basic control structions. Read libpng-manual.txt or libpng.3 for more info.
* *
@ -776,6 +776,7 @@ typedef png_unknown_chunk * * png_unknown_chunkpp;
#define PNG_INFO_sPLT 0x2000U /* ESR, 1.0.6 */ #define PNG_INFO_sPLT 0x2000U /* ESR, 1.0.6 */
#define PNG_INFO_sCAL 0x4000U /* ESR, 1.0.6 */ #define PNG_INFO_sCAL 0x4000U /* ESR, 1.0.6 */
#define PNG_INFO_IDAT 0x8000U /* ESR, 1.0.6 */ #define PNG_INFO_IDAT 0x8000U /* ESR, 1.0.6 */
#define PNG_INFO_eXIf 0x10000U /* GR-P, 1.6.31 */
/* 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
@ -1788,7 +1789,8 @@ PNG_EXPORT(99, void, png_data_freer, (png_const_structrp png_ptr,
#define PNG_FREE_PLTE 0x1000U #define PNG_FREE_PLTE 0x1000U
#define PNG_FREE_TRNS 0x2000U #define PNG_FREE_TRNS 0x2000U
#define PNG_FREE_TEXT 0x4000U #define PNG_FREE_TEXT 0x4000U
#define PNG_FREE_ALL 0x7fffU #define PNG_FREE_EXIF 0x8000U /* Added at libpng-1.6.31 */
#define PNG_FREE_ALL 0xffffU
#define PNG_FREE_MUL 0x4220U /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ #define PNG_FREE_MUL 0x4220U /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */
#ifdef PNG_USER_MEM_SUPPORTED #ifdef PNG_USER_MEM_SUPPORTED
@ -2007,6 +2009,13 @@ PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_const_structrp png_ptr,
png_fixed_point int_blue_Z)) png_fixed_point int_blue_Z))
#endif #endif
#ifdef PNG_eXIf_SUPPORTED
PNG_EXPORT(246, png_uint_32, png_get_eXIf, (png_const_structrp png_ptr,
png_inforp info_ptr, png_bytep *exif));
PNG_EXPORT(247, void, png_set_eXIf, (png_const_structrp png_ptr,
png_inforp info_ptr, const png_bytep exif));
#endif
#ifdef PNG_gAMA_SUPPORTED #ifdef PNG_gAMA_SUPPORTED
PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, (png_const_structrp png_ptr, PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, (png_const_structrp png_ptr,
png_const_inforp info_ptr, double *file_gamma)) png_const_inforp info_ptr, double *file_gamma))
@ -2025,9 +2034,6 @@ PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_const_structrp png_ptr,
#ifdef PNG_hIST_SUPPORTED #ifdef PNG_hIST_SUPPORTED
PNG_EXPORT(141, png_uint_32, png_get_hIST, (png_const_structrp png_ptr, PNG_EXPORT(141, png_uint_32, png_get_hIST, (png_const_structrp png_ptr,
png_inforp info_ptr, png_uint_16p *hist)); png_inforp info_ptr, png_uint_16p *hist));
#endif
#ifdef PNG_hIST_SUPPORTED
PNG_EXPORT(142, void, png_set_hIST, (png_const_structrp png_ptr, PNG_EXPORT(142, void, png_set_hIST, (png_const_structrp png_ptr,
png_inforp info_ptr, png_const_uint_16p hist)); png_inforp info_ptr, png_const_uint_16p hist));
#endif #endif
@ -3253,7 +3259,7 @@ PNG_EXPORT(244, int, png_set_option, (png_structrp png_ptr, int option,
* one to use is one more than this.) * one to use is one more than this.)
*/ */
#ifdef PNG_EXPORT_LAST_ORDINAL #ifdef PNG_EXPORT_LAST_ORDINAL
PNG_EXPORT_LAST_ORDINAL(245); PNG_EXPORT_LAST_ORDINAL(247);
#endif #endif
#ifdef __cplusplus #ifdef __cplusplus

2
pngconf.h
View File

@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng /* pngconf.h - machine configurable file for libpng
* *
* libpng version 1.6.30, June 28, 2017 * libpng version 1.6.31, July 27, 2017
* *
* Copyright (c) 1998-2002,2004,2006-2016 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)

8
pngerror.c
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 1.6.26 [October 20, 2016] * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2017 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.)
* *
@ -163,7 +163,7 @@ 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 */ /* FALLTHROUGH */
case PNG_NUMBER_FORMAT_u: case PNG_NUMBER_FORMAT_u:
*--end = digits[number % 10]; *--end = digits[number % 10];
@ -173,7 +173,7 @@ 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 */ /* FALLTHROUGH */
case PNG_NUMBER_FORMAT_x: case PNG_NUMBER_FORMAT_x:
*--end = digits[number & 0xf]; *--end = digits[number & 0xf];

18
pngget.c
View File

@ -773,6 +773,24 @@ png_get_sPLT(png_const_structrp png_ptr, png_inforp info_ptr,
} }
#endif #endif
#ifdef PNG_eXIf_SUPPORTED
png_uint_32 PNGAPI
png_get_eXIf(png_const_structrp png_ptr, png_inforp info_ptr,
png_bytep *exif)
{
png_debug1(1, "in %s retrieval function", "eXIf");
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_eXIf) != 0 && exif != NULL)
{
*exif = info_ptr->exif;
return (PNG_INFO_eXIf);
}
return (0);
}
#endif
#ifdef PNG_hIST_SUPPORTED #ifdef PNG_hIST_SUPPORTED
png_uint_32 PNGAPI png_uint_32 PNGAPI
png_get_hIST(png_const_structrp png_ptr, png_inforp info_ptr, png_get_hIST(png_const_structrp png_ptr, png_inforp info_ptr,

5
pnginfo.h
View File

@ -185,6 +185,11 @@ defined(PNG_READ_BACKGROUND_SUPPORTED)
png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */ png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */
#endif #endif
#ifdef PNG_eXIf_SUPPORTED
int num_exif;
png_bytep exif;
#endif
#ifdef PNG_hIST_SUPPORTED #ifdef PNG_hIST_SUPPORTED
/* The hIST chunk contains the relative frequency or importance of the /* The hIST chunk contains the relative frequency or importance of the
* various palette entries, so that a viewer can intelligently select a * various palette entries, so that a viewer can intelligently select a

41
pngpriv.h
View File

@ -1,7 +1,7 @@
/* pngpriv.h - private declarations for use inside libpng /* pngpriv.h - private declarations for use inside libpng
* *
* Last changed in libpng 1.6.30 [(PENDING RELEASE)] * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2017 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.)
@ -35,7 +35,9 @@
* Windows/Visual Studio) there is no effect; the OS specific tests below are * Windows/Visual Studio) there is no effect; the OS specific tests below are
* still required (as of 2011-05-02.) * still required (as of 2011-05-02.)
*/ */
#define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */ #ifndef _POSIX_SOURCE
# define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */
#endif
#ifndef PNG_VERSION_INFO_ONLY #ifndef PNG_VERSION_INFO_ONLY
/* Standard library headers not required by png.h: */ /* Standard library headers not required by png.h: */
@ -452,6 +454,21 @@
# define png_fixed_error(s1,s2) png_err(s1) # define png_fixed_error(s1,s2) png_err(s1)
#endif #endif
/* Some fixed point APIs are still required even if not exported because
* they get used by the corresponding floating point APIs. This magic
* deals with this:
*/
#ifdef PNG_FIXED_POINT_SUPPORTED
# define PNGFAPI PNGAPI
#else
# define PNGFAPI /* PRIVATE */
#endif
#ifndef PNG_VERSION_INFO_ONLY
/* Other defines specific to compilers can go here. Try to keep
* them inside an appropriate ifdef/endif pair for portability.
*/
/* C allows up-casts from (void*) to any pointer and (const void*) to any /* C allows up-casts from (void*) to any pointer and (const void*) to any
* pointer to a const object. C++ regards this as a type error and requires an * pointer to a const object. C++ regards this as a type error and requires an
* explicit, static, cast and provides the static_cast<> rune to ensure that * explicit, static, cast and provides the static_cast<> rune to ensure that
@ -480,20 +497,6 @@
# define png_aligncastconst(type, value) ((const void*)(value)) # define png_aligncastconst(type, value) ((const void*)(value))
#endif /* __cplusplus */ #endif /* __cplusplus */
/* Some fixed point APIs are still required even if not exported because
* they get used by the corresponding floating point APIs. This magic
* deals with this:
*/
#ifdef PNG_FIXED_POINT_SUPPORTED
# define PNGFAPI PNGAPI
#else
# define PNGFAPI /* PRIVATE */
#endif
#ifndef PNG_VERSION_INFO_ONLY
/* Other defines specific to compilers can go here. Try to keep
* them inside an appropriate ifdef/endif pair for portability.
*/
#if defined(PNG_FLOATING_POINT_SUPPORTED) ||\ #if defined(PNG_FLOATING_POINT_SUPPORTED) ||\
defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
/* png.c requires the following ANSI-C constants if the conversion of /* png.c requires the following ANSI-C constants if the conversion of
@ -839,6 +842,7 @@
#define png_PLTE PNG_U32( 80, 76, 84, 69) #define png_PLTE PNG_U32( 80, 76, 84, 69)
#define png_bKGD PNG_U32( 98, 75, 71, 68) #define png_bKGD PNG_U32( 98, 75, 71, 68)
#define png_cHRM PNG_U32( 99, 72, 82, 77) #define png_cHRM PNG_U32( 99, 72, 82, 77)
#define png_eXIf PNG_U32(101, 88, 73, 102) /* registered July 2017 */
#define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */ #define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */
#define png_gAMA PNG_U32(103, 65, 77, 65) #define png_gAMA PNG_U32(103, 65, 77, 65)
#define png_gIFg PNG_U32(103, 73, 70, 103) #define png_gIFg PNG_U32(103, 73, 70, 103)
@ -1438,6 +1442,11 @@ PNG_INTERNAL_FUNCTION(void,png_handle_cHRM,(png_structrp png_ptr,
png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
#endif #endif
#ifdef PNG_READ_eXIf_SUPPORTED
PNG_INTERNAL_FUNCTION(void,png_handle_eXIf,(png_structrp png_ptr,
png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
#endif
#ifdef PNG_READ_gAMA_SUPPORTED #ifdef PNG_READ_gAMA_SUPPORTED
PNG_INTERNAL_FUNCTION(void,png_handle_gAMA,(png_structrp png_ptr, PNG_INTERNAL_FUNCTION(void,png_handle_gAMA,(png_structrp png_ptr,
png_inforp info_ptr, png_uint_32 length),PNG_EMPTY); png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);

15
pngread.c
View File

@ -1,8 +1,8 @@
/* pngread.c - read a PNG file /* pngread.c - read a PNG file
* *
* Last changed in libpng 1.6.26 [October 20, 2016] * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2017 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.)
* *
@ -1883,7 +1883,7 @@ png_create_colormap_entry(png_image_read_control *display,
{ {
case 4: case 4:
entry[afirst ? 0 : 3] = (png_uint_16)alpha; entry[afirst ? 0 : 3] = (png_uint_16)alpha;
/* FALL THROUGH */ /* FALLTHROUGH */
case 3: case 3:
if (alpha < 65535) if (alpha < 65535)
@ -1905,7 +1905,7 @@ png_create_colormap_entry(png_image_read_control *display,
case 2: case 2:
entry[1 ^ afirst] = (png_uint_16)alpha; entry[1 ^ afirst] = (png_uint_16)alpha;
/* FALL THROUGH */ /* FALLTHROUGH */
case 1: case 1:
if (alpha < 65535) if (alpha < 65535)
@ -1934,6 +1934,7 @@ png_create_colormap_entry(png_image_read_control *display,
{ {
case 4: case 4:
entry[afirst ? 0 : 3] = (png_byte)alpha; entry[afirst ? 0 : 3] = (png_byte)alpha;
/* FALLTHROUGH */
case 3: case 3:
entry[afirst + (2 ^ bgr)] = (png_byte)blue; entry[afirst + (2 ^ bgr)] = (png_byte)blue;
entry[afirst + 1] = (png_byte)green; entry[afirst + 1] = (png_byte)green;
@ -1942,6 +1943,7 @@ png_create_colormap_entry(png_image_read_control *display,
case 2: case 2:
entry[1 ^ afirst] = (png_byte)alpha; entry[1 ^ afirst] = (png_byte)alpha;
/* FALLTHROUGH */
case 1: case 1:
entry[afirst] = (png_byte)green; entry[afirst] = (png_byte)green;
break; break;
@ -2861,7 +2863,7 @@ png_image_read_colormap(png_voidp argument)
case P_sRGB: case P_sRGB:
/* Change to 8-bit sRGB */ /* Change to 8-bit sRGB */
png_set_alpha_mode_fixed(png_ptr, PNG_ALPHA_PNG, PNG_GAMMA_sRGB); png_set_alpha_mode_fixed(png_ptr, PNG_ALPHA_PNG, PNG_GAMMA_sRGB);
/* FALL THROUGH */ /* FALLTHROUGH */
case P_FILE: case P_FILE:
if (png_ptr->bit_depth > 8) if (png_ptr->bit_depth > 8)
@ -3179,8 +3181,7 @@ png_image_read_colormapped(png_voidp argument)
image->colormap_entries == 244 /* 216 + 1 + 27 */) image->colormap_entries == 244 /* 216 + 1 + 27 */)
break; break;
/* goto bad_output; */ goto bad_output;
/* FALL THROUGH */
default: default:
bad_output: bad_output:

5
pngrtran.c
View File

@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers /* pngrtran.c - transforms the data in a row for PNG readers
* *
* Last changed in libpng 1.6.30 [(PENDING RELEASE)] * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2017 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.)
@ -49,6 +49,7 @@ png_set_crc_action(png_structrp png_ptr, int crit_action, int ancil_action)
case PNG_CRC_WARN_DISCARD: /* Not a valid action for critical data */ case PNG_CRC_WARN_DISCARD: /* Not a valid action for critical data */
png_warning(png_ptr, png_warning(png_ptr,
"Can't discard critical data on CRC error"); "Can't discard critical data on CRC error");
/* FALLTHROUGH */
case PNG_CRC_ERROR_QUIT: /* Error/quit */ case PNG_CRC_ERROR_QUIT: /* Error/quit */
case PNG_CRC_DEFAULT: case PNG_CRC_DEFAULT:
@ -1253,7 +1254,7 @@ png_init_rgb_transformations(png_structrp png_ptr)
default: default:
case 8: case 8:
/* FALL THROUGH (Already 8 bits) */ /* FALLTHROUGH */ /* (Already 8 bits) */
case 16: case 16:
/* Already a full 16 bits */ /* Already a full 16 bits */

44
pngrutil.c
View File

@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file /* pngrutil.c - utilities to read a PNG file
* *
* Last changed in libpng 1.6.30 [(PENDING RELEASE)] * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2017 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.)
@ -2009,6 +2009,44 @@ png_handle_bKGD(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
} }
#endif #endif
#ifdef PNG_READ_eXIf_SUPPORTED
void /* PRIVATE */
png_handle_eXIf(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
{
unsigned int i;
png_bytep eXIf_buf;
png_debug(1, "in png_handle_eXIf");
if ((png_ptr->mode & PNG_HAVE_IHDR) == 0)
png_chunk_error(png_ptr, "missing IHDR");
else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_eXIf) != 0)
{
png_crc_finish(png_ptr, length);
png_chunk_benign_error(png_ptr, "duplicate");
return;
}
eXIf_buf = png_voidcast(png_bytep,
png_malloc_warn(png_ptr, length));
for (i = 0; i < length; i++)
{
png_byte buf[1];
png_crc_read(png_ptr, buf, 1);
eXIf_buf[i] = buf[0];
}
if (png_crc_finish(png_ptr, 0) != 0)
return;
info_ptr->num_exif = length;
png_set_eXIf(png_ptr, info_ptr, eXIf_buf);
}
#endif
#ifdef PNG_READ_hIST_SUPPORTED #ifdef PNG_READ_hIST_SUPPORTED
void /* PRIVATE */ void /* PRIVATE */
png_handle_hIST(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length) png_handle_hIST(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
@ -2978,7 +3016,7 @@ png_handle_unknown(png_structrp png_ptr, png_inforp info_ptr,
case 2: case 2:
png_ptr->user_chunk_cache_max = 1; png_ptr->user_chunk_cache_max = 1;
png_chunk_benign_error(png_ptr, "no space in chunk cache"); png_chunk_benign_error(png_ptr, "no space in chunk cache");
/* FALL THROUGH */ /* FALLTHROUGH */
case 1: case 1:
/* NOTE: prior to 1.6.0 this case resulted in an unknown critical /* NOTE: prior to 1.6.0 this case resulted in an unknown critical
* chunk being skipped, now there will be a hard error below. * chunk being skipped, now there will be a hard error below.
@ -2987,7 +3025,7 @@ png_handle_unknown(png_structrp png_ptr, png_inforp info_ptr,
default: /* not at limit */ default: /* not at limit */
--(png_ptr->user_chunk_cache_max); --(png_ptr->user_chunk_cache_max);
/* FALL THROUGH */ /* FALLTHROUGH */
case 0: /* no limit */ case 0: /* no limit */
# endif /* USER_LIMITS */ # endif /* USER_LIMITS */
/* Here when the limit isn't reached or when limits are compiled /* Here when the limit isn't reached or when limits are compiled

35
pngset.c
View File

@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct /* pngset.c - storage of image information into info struct
* *
* Last changed in libpng 1.6.30 [(PENDING RELEASE)] * Last changed in libpng 1.6.30 [June 28, 2017]
* Copyright (c) 1998-2017 Glenn Randers-Pehrson * Copyright (c) 1998-2017 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.)
@ -134,6 +134,39 @@ png_set_cHRM_XYZ(png_const_structrp png_ptr, png_inforp info_ptr, double red_X,
#endif /* cHRM */ #endif /* cHRM */
#ifdef PNG_eXIf_SUPPORTED
void PNGAPI
png_set_eXIf(png_const_structrp png_ptr, png_inforp info_ptr,
const png_bytep eXIf_buf)
{
int i;
png_debug1(1, "in %s storage function", "eXIf");
if (png_ptr == NULL || info_ptr == NULL)
return;
png_free_data(png_ptr, info_ptr, PNG_FREE_EXIF, 0);
info_ptr->exif = png_voidcast(png_bytep, png_malloc_warn(png_ptr,
info_ptr->num_exif));
if (info_ptr->exif == NULL)
{
png_warning(png_ptr, "Insufficient memory for eXIf chunk data");
return;
}
info_ptr->free_me |= PNG_FREE_EXIF;
for (i = 0; i < info_ptr->num_exif; i++)
info_ptr->exif[i] = eXIf_buf[i];
info_ptr->valid |= PNG_INFO_eXIf;
}
#endif /* eXIf */
#ifdef PNG_gAMA_SUPPORTED #ifdef PNG_gAMA_SUPPORTED
void PNGFAPI void PNGFAPI
png_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr, png_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr,

3
pngstruct.h
View File

@ -479,5 +479,8 @@ struct png_struct_def
png_colorspace colorspace; png_colorspace colorspace;
#endif #endif
#endif #endif
/* New member added in libpng-1.6.31 */
int num_exif;
}; };
#endif /* PNGSTRUCT_H */ #endif /* PNGSTRUCT_H */

18
pngtest.c
View File

@ -1192,6 +1192,14 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
} }
} }
#endif #endif
#ifdef PNG_eXIf_SUPPORTED
{
png_bytep exif;
if (png_get_eXIf(read_ptr, read_info_ptr, &exif) != 0)
png_set_eXIf(write_ptr, write_info_ptr, exif);
}
#endif
#ifdef PNG_hIST_SUPPORTED #ifdef PNG_hIST_SUPPORTED
{ {
png_uint_16p hist; png_uint_16p hist;
@ -1530,6 +1538,14 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
} }
} }
#endif #endif
#ifdef PNG_eXIf_SUPPORTED
{
png_bytep exif;
if (png_get_eXIf(read_ptr, end_info_ptr, &exif) != 0)
png_set_eXIf(write_ptr, write_end_info_ptr, exif);
}
#endif
#ifdef PNG_tIME_SUPPORTED #ifdef PNG_tIME_SUPPORTED
{ {
png_timep mod_time; png_timep mod_time;
@ -2088,4 +2104,4 @@ main(void)
#endif #endif
/* Generate a compiler error if there is an old png.h in the search path. */ /* Generate a compiler error if there is an old png.h in the search path. */
typedef png_libpng_version_1_6_30 Your_png_h_is_not_version_1_6_30; typedef png_libpng_version_1_6_31 Your_png_h_is_not_version_1_6_31;

BIN
pngtest.png
View File

Binary file not shown.
Side by Side Swipe Overlay

Before

Width:  |  Height:  |  Size: 8.5 KiB

After

Width:  |  Height:  |  Size: 8.6 KiB

2
pngtrans.c
View File

@ -1,7 +1,7 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers) /* pngtrans.c - transforms the data in a row (used by both readers and writers)
* *
* Last changed in libpng 1.6.30 [(PENDING RELEASE)] * Last changed in libpng 1.6.30 [June 28, 2017]
* Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

10
pngwrite.c
View File

@ -1,8 +1,8 @@
/* pngwrite.c - general routines to write a PNG file /* pngwrite.c - general routines to write a PNG file
* *
* Last changed in libpng 1.6.26 [October 20, 2016] * Last changed in libpng 1.6.31 [July 27, 2017]
* Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson * Copyright (c) 1998-2002,2004,2006-2017 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.)
* *
@ -1007,8 +1007,8 @@ png_set_filter(png_structrp png_ptr, int method, int filters)
case 5: case 5:
case 6: case 6:
case 7: png_app_error(png_ptr, "Unknown row filter for method 0"); case 7: png_app_error(png_ptr, "Unknown row filter for method 0");
/* FALL THROUGH */
#endif /* WRITE_FILTER */ #endif /* WRITE_FILTER */
/* FALLTHROUGH */
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;
@ -1875,7 +1875,7 @@ png_image_set_PLTE(png_image_write_control *display)
tRNS[i] = entry[afirst ? 0 : 3]; tRNS[i] = entry[afirst ? 0 : 3];
if (tRNS[i] < 255) if (tRNS[i] < 255)
num_trans = i+1; num_trans = i+1;
/* FALL THROUGH */ /* FALLTHROUGH */
case 3: case 3:
palette[i].blue = entry[afirst + (2 ^ bgr)]; palette[i].blue = entry[afirst + (2 ^ bgr)];
palette[i].green = entry[afirst + 1]; palette[i].green = entry[afirst + 1];
@ -1886,7 +1886,7 @@ png_image_set_PLTE(png_image_write_control *display)
tRNS[i] = entry[1 ^ afirst]; tRNS[i] = entry[1 ^ afirst];
if (tRNS[i] < 255) if (tRNS[i] < 255)
num_trans = i+1; num_trans = i+1;
/* FALL THROUGH */ /* FALLTHROUGH */
case 1: case 1:
palette[i].blue = palette[i].red = palette[i].green = palette[i].blue = palette[i].red = palette[i].green =
entry[afirst]; entry[afirst];

31
pngwutil.c
View File

@ -1473,6 +1473,37 @@ png_write_bKGD(png_structrp png_ptr, png_const_color_16p back, int color_type)
} }
#endif #endif
#ifdef PNG_WRITE_eXIf_SUPPORTED
/* Write the Exif data */
void /* PRIVATE */
png_write_eXIf(png_structrp png_ptr, png_bytep exif, int num_exif)
{
int i;
png_byte buf[3];
png_debug(1, "in png_write_eXIf");
if (num_exif > (int)png_ptr->num_exif)
{
png_debug2(3, "num_exif = %d, png_ptr->num_exif = %d", num_exif,
png_ptr->num_exif);
png_warning(png_ptr, "Invalid number of exif bytes specified");
return;
}
png_write_chunk_header(png_ptr, png_eXIf, (png_uint_32)(num_exif));
for (i = 0; i < num_exif; i++)
{
buf[i] = exif[i];
png_write_chunk_data(png_ptr, buf, (png_size_t)1);
}
png_write_chunk_end(png_ptr);
}
#endif
#ifdef PNG_WRITE_hIST_SUPPORTED #ifdef PNG_WRITE_hIST_SUPPORTED
/* Write the histogram */ /* Write the histogram */
void /* PRIVATE */ void /* PRIVATE */

2
projects/vstudio/README.txt
View File

@ -1,7 +1,7 @@
VisualStudio instructions VisualStudio instructions
libpng version 1.6.30 - June 28, 2017 libpng version 1.6.31 - July 27, 2017
Copyright (c) 2010,2013,2015 Glenn Randers-Pehrson Copyright (c) 2010,2013,2015 Glenn Randers-Pehrson

2
projects/vstudio/zlib.props
View File

@ -2,7 +2,7 @@
<!-- <!--
* zlib.props - location of zlib source * zlib.props - location of zlib source
* *
* libpng version 1.6.30 - June 28, 2017 * libpng version 1.6.31 - July 27, 2017
* *
* Copyright (c) 1998-2011 Glenn Randers-Pehrson * Copyright (c) 1998-2011 Glenn Randers-Pehrson
* *

12
scripts/README.txt
View File

@ -1,9 +1,11 @@
Makefiles for libpng version 1.6.30 - June 28, 2017 Makefiles for libpng version 1.6.31 - July 27, 2017
pnglibconf.h.prebuilt => Stores configuration settings pnglibconf.h.prebuilt => Stores configuration settings
makefile.linux => Linux/ELF makefile makefile.linux => Linux/ELF makefile
(gcc, creates libpng16.so.16.1.6.30) (gcc, creates libpng16.so.16.1.6.31)
makefile.linux-opt=> Linux/ELF makefile with hardware optimizations on
(gcc, creates libpng16.so.16.1.6.31)
makefile.gcc => Generic makefile (gcc, creates static libpng.a) makefile.gcc => Generic makefile (gcc, creates static libpng.a)
makefile.knr => Archaic UNIX Makefile that converts files with makefile.knr => Archaic UNIX Makefile that converts files with
ansi2knr (Requires ansi2knr.c from ansi2knr (Requires ansi2knr.c from
@ -33,12 +35,12 @@ pnglibconf.h.prebuilt => Stores configuration settings
makefile.os2 => OS/2 Makefile (gcc and emx, requires libpng.def) makefile.os2 => OS/2 Makefile (gcc and emx, requires libpng.def)
makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
makefile.sggcc => Silicon Graphics (gcc, makefile.sggcc => Silicon Graphics (gcc,
creates libpng16.so.16.1.6.30) creates libpng16.so.16.1.6.31)
makefile.sgi => Silicon Graphics IRIX makefile (cc, creates static lib) makefile.sgi => Silicon Graphics IRIX makefile (cc, creates static lib)
makefile.solaris => Solaris 2.X makefile (gcc, makefile.solaris => Solaris 2.X makefile (gcc,
creates libpng16.so.16.1.6.30) creates libpng16.so.16.1.6.31)
makefile.so9 => Solaris 9 makefile (gcc, makefile.so9 => Solaris 9 makefile (gcc,
creates libpng16.so.16.1.6.30) creates libpng16.so.16.1.6.31)
makefile.std => Generic UNIX makefile (cc, creates static libpng.a) makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
makefile.sunos => Sun makefile makefile.sunos => Sun makefile
makefile.32sunu => Sun Ultra 32-bit makefile makefile.32sunu => Sun Ultra 32-bit makefile

2
scripts/def.c
View File

@ -21,7 +21,7 @@ PNG_DFN "OS2 DESCRIPTION "PNG image compression library""
PNG_DFN "OS2 CODE PRELOAD MOVEABLE DISCARDABLE" PNG_DFN "OS2 CODE PRELOAD MOVEABLE DISCARDABLE"
PNG_DFN "" PNG_DFN ""
PNG_DFN "EXPORTS" PNG_DFN "EXPORTS"
PNG_DFN ";Version 1.6.30" PNG_DFN ";Version 1.6.31"
#define PNG_EXPORTA(ordinal, type, name, args, attributes)\ #define PNG_EXPORTA(ordinal, type, name, args, attributes)\
PNG_DFN "@" SYMBOL_PREFIX "@@" name "@" PNG_DFN "@" SYMBOL_PREFIX "@@" name "@"

2
scripts/libpng-config-head.in
View File

@ -11,7 +11,7 @@
# Modeled after libxml-config. # Modeled after libxml-config.
version=1.6.30 version=1.6.31
prefix="" prefix=""
libdir="" libdir=""
libs="" libs=""

2
scripts/libpng.pc.in
View File

@ -5,6 +5,6 @@ includedir=@includedir@/libpng16
Name: libpng Name: libpng
Description: Loads and saves PNG files Description: Loads and saves PNG files
Version: 1.6.30 Version: 1.6.31
Libs: -L${libdir} -lpng16 Libs: -L${libdir} -lpng16
Cflags: -I${includedir} Cflags: -I${includedir}

2
scripts/makefile.cegcc
View File

@ -23,7 +23,7 @@
VERMAJ = 1 VERMAJ = 1
VERMIN = 6 VERMIN = 6
VERMIC = 30 VERMIC = 31
VER = $(VERMAJ).$(VERMIN).$(VERMIC) VER = $(VERMAJ).$(VERMIN).$(VERMIC)
NAME = libpng NAME = libpng
PACKAGE = $(NAME)-$(VER) PACKAGE = $(NAME)-$(VER)

2
scripts/makefile.linux
View File

@ -10,7 +10,7 @@
# Library name: # Library name:
LIBNAME = libpng16 LIBNAME = libpng16
PNGMAJ = 16 PNGMAJ = 16
RELEASE = 30 RELEASE = 31
# Shared library names: # Shared library names:
LIBSO=$(LIBNAME).so LIBSO=$(LIBNAME).so

265
scripts/makefile.linux-opt Normal file
View File

@ -0,0 +1,265 @@
# makefile for libpng.a and libpng16.so on Linux ELF with gcc
# Copyright (C) 1998,1999,2002,2006,2008,2010-2014,2017 Greg Roelofs and
# Glenn Randers-Pehrson
# Copyright (C) 1996,1997 Andreas Dilger
#
# This code is released under the libpng license.
# For conditions of distribution and use, see the disclaimer
# and license in png.h
# Library name:
LIBNAME = libpng16
PNGMAJ = 16
RELEASE = 31
# Shared library names:
LIBSO=$(LIBNAME).so
LIBSOMAJ=$(LIBNAME).so.$(PNGMAJ)
LIBSOREL=$(LIBSOMAJ).$(RELEASE)
OLDSO=libpng.so
# Utilities:
AR_RC=ar rc
CC=gcc
MKDIR_P=mkdir -p
LN_SF=ln -sf
RANLIB=ranlib
CP=cp
RM_F=/bin/rm -f
# where "make install" puts libpng16.a, libpng16.so*,
# libpng16/png.h, libpng16/pngconf.h, and libpng16/pnglibconf.h
# Prefix must be a full pathname.
prefix=/usr/local
exec_prefix=$(prefix)
# Where the zlib library and include files are located.
#ZLIBLIB=/usr/local/lib
#ZLIBINC=/usr/local/include
ZLIBLIB=../zlib
ZLIBINC=../zlib
ALIGN=
# for i386:
#ALIGN=-malign-loops=2 -malign-functions=2
#WARNMORE=-Wwrite-strings -Wpointer-arith \
# -Wmissing-declarations -Wtraditional -Wcast-align \
# -Wstrict-prototypes -Wmissing-prototypes
# for pgcc version 2.95.1, -O3 is buggy; don't use it.
CPPFLAGS=-I$(ZLIBINC)
CPPFLAGS += -DPNG_ARM_NEON
CPPFLAGS += -DPNG_MIPS_MSA
CPPFLAGS += -DPNG_INTEL_SSE
CPPFLAGS += -DPNG_POWERPC_VSX
CPPFLAGS+=-ansi -pedantic -Wextra -Wall -Wshadow -Wno-sign-conversion
CPPFLAGS+=-W -Wall -Wconversion $(ALIGN)
# CPPFLAGS+=$(WARNMORE)
CFLAGS= -O3 -funroll-loops
LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng16 -lz -lm
LDFLAGS_A=-L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) libpng.a -lz -lm
INCPATH=$(prefix)/include
LIBPATH=$(exec_prefix)/lib
MANPATH=$(prefix)/man
BINPATH=$(exec_prefix)/bin
# override DESTDIR= on the make install command line to easily support
# installing into a temporary location. Example:
#
# make install DESTDIR=/tmp/build/libpng
#
# If you're going to install into a temporary location
# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
# you execute make install.
DESTDIR=
DB=$(DESTDIR)$(BINPATH)
DI=$(DESTDIR)$(INCPATH)
DL=$(DESTDIR)$(LIBPATH)
DM=$(DESTDIR)$(MANPATH)
# Pre-built configuration
# See scripts/pnglibconf.mak for more options
PNGLIBCONF_H_PREBUILT = scripts/pnglibconf.h.prebuilt
OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
pngwtran.o pngmem.o pngerror.o pngpread.o \
arm/arm_init.o arm/filter_neon_intrinsics.o \
mips/mips_init.o mips/filter_msa_intrinsics.o \
intel/intel_init.o intel/filter_sse2_intrinsics.o\
powerpc/powerpc_init.o powerpc/filter_vsx_intrinsics.o
OBJSDLL = $(OBJS:.o=.pic.o)
.SUFFIXES: .c .o .pic.o
.c.o:
$(CC) -c $(CPPFLAGS) $(CFLAGS) -o $@ $<
.c.pic.o:
$(CC) -c $(CPPFLAGS) $(CFLAGS) -fPIC -o $@ $*.c
all: libpng.a $(LIBSO) pngtest pngtest-static libpng.pc libpng-config
pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
$(CP) $(PNGLIBCONF_H_PREBUILT) $@
libpng.a: $(OBJS)
$(AR_RC) $@ $(OBJS)
$(RANLIB) $@
libpng.pc:
cat scripts/libpng.pc.in | sed -e s!@prefix@!$(prefix)! \
-e s!@exec_prefix@!$(exec_prefix)! \
-e s!@libdir@!$(LIBPATH)! \
-e s!@includedir@!$(INCPATH)! \
-e s!-lpng16!-lpng16\ -lz\ -lm! > libpng.pc
libpng-config:
( cat scripts/libpng-config-head.in; \
echo prefix=\"$(prefix)\"; \
echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
echo L_opts=\"-L$(LIBPATH)\"; \
echo R_opts=\"-Wl,-rpath,$(LIBPATH)\"; \
echo libs=\"-lpng16 -lz -lm\"; \
cat scripts/libpng-config-body.in ) > libpng-config
chmod +x libpng-config
$(LIBSO): $(LIBSOMAJ)
$(LN_SF) $(LIBSOMAJ) $(LIBSO)
$(LIBSOMAJ): $(OBJSDLL)
$(CC) -shared -Wl,-soname,$(LIBSOMAJ) -o $(LIBSOMAJ) $(OBJSDLL)
pngtest: pngtest.o $(LIBSO)
$(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)
pngtest-static: pngtest.o libpng.a
$(CC) -o pngtest-static $(CFLAGS) pngtest.o $(LDFLAGS_A)
test: pngtest pngtest-static
@echo ""
@echo " Running pngtest dynamically linked with $(LIBSO):"
@echo ""
./pngtest
@echo ""
@echo " Running pngtest statically linked with libpng.a:"
@echo ""
./pngtest-static
install-headers: png.h pngconf.h pnglibconf.h
-@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi
-@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi
cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME)
chmod 644 $(DI)/$(LIBNAME)/png.h $(DI)/$(LIBNAME)/pngconf.h $(DI)/$(LIBNAME)/pnglibconf.h
-@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h
-@$(RM_F) $(DI)/libpng
(cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .)
install-static: install-headers libpng.a
-@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi
cp libpng.a $(DL)/$(LIBNAME).a
chmod 644 $(DL)/$(LIBNAME).a
-@$(RM_F) $(DL)/libpng.a
(cd $(DL); $(LN_SF) $(LIBNAME).a libpng.a)
install-shared: install-headers $(LIBSOMAJ) libpng.pc
-@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi
-@$(RM_F) $(DL)/$(LIBSO)
-@$(RM_F) $(DL)/$(LIBSOREL)
-@$(RM_F) $(DL)/$(OLDSO)
cp $(LIBSOMAJ) $(DL)/$(LIBSOREL)
chmod 755 $(DL)/$(LIBSOREL)
(cd $(DL); \
$(LN_SF) $(LIBSOREL) $(LIBSO); \
$(LN_SF) $(LIBSO) $(OLDSO))
-@if [ ! -d $(DL)/pkgconfig ]; then $(MKDIR_P) $(DL)/pkgconfig; fi
-@$(RM_F) $(DL)/pkgconfig/$(LIBNAME).pc
-@$(RM_F) $(DL)/pkgconfig/libpng.pc
cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
(cd $(DL)/pkgconfig; $(LN_SF) $(LIBNAME).pc libpng.pc)
install-man: libpng.3 libpngpf.3 png.5
-@if [ ! -d $(DM) ]; then $(MKDIR_P) $(DM); fi
-@if [ ! -d $(DM)/man3 ]; then $(MKDIR_P) $(DM)/man3; fi
-@$(RM_F) $(DM)/man3/libpng.3
-@$(RM_F) $(DM)/man3/libpngpf.3
cp libpng.3 $(DM)/man3
cp libpngpf.3 $(DM)/man3
-@if [ ! -d $(DM)/man5 ]; then $(MKDIR_P) $(DM)/man5; fi
-@$(RM_F) $(DM)/man5/png.5
cp png.5 $(DM)/man5
install-config: libpng-config
-@if [ ! -d $(DB) ]; then $(MKDIR_P) $(DB); fi
-@$(RM_F) $(DB)/libpng-config
-@$(RM_F) $(DB)/$(LIBNAME)-config
cp libpng-config $(DB)/$(LIBNAME)-config
chmod 755 $(DB)/$(LIBNAME)-config
(cd $(DB); $(LN_SF) $(LIBNAME)-config libpng-config)
install: install-static install-shared install-man install-config
# If you installed in $(DESTDIR), test-installed won't work until you
# move the library to its final location. Use test-dd to test it
# before then.
test-dd:
echo
echo Testing installed dynamic shared library in $(DL).
$(CC) -I$(DI) $(CPPFLAGS) \
`$(BINPATH)/$(LIBNAME)-config --cflags` pngtest.c \
-L$(DL) -L$(ZLIBLIB) -Wl, -rpath,$(DL) -Wl,-rpath,$(ZLIBLIB) \
-o pngtestd `$(BINPATH)/$(LIBNAME)-config --ldflags`
./pngtestd pngtest.png
test-installed:
$(CC) $(CPPFLAGS) \
`$(BINPATH)/$(LIBNAME)-config --cflags` pngtest.c \
-L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) \
-o pngtesti `$(BINPATH)/$(LIBNAME)-config --ldflags`
./pngtesti pngtest.png
clean:
$(RM_F) *.o libpng.a pngtest pngout.png libpng-config \
$(LIBSO) $(LIBSOMAJ)* pngtest-static pngtesti \
libpng.pc pnglibconf.h
DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
writelock:
chmod a-w *.[ch35] $(DOCS) scripts/*
# DO NOT DELETE THIS LINE -- make depend depends on it.
png.o png.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngerror.o pngerror.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngrio.o pngrio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngwio.o pngwio.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngmem.o pngmem.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngset.o pngset.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngget.o pngget.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngread.o pngread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngrtran.o pngrtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngrutil.o pngrutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngtrans.o pngtrans.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngwrite.o pngwrite.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
arm/arm_init.o arm/arm_init.o: pngpriv.h
arm/filter_neon_intrinsics.o arm/filter_neon_intrinsics.pic.o: pngpriv.h
mips/mips_init.o mips/mips_init.pic.o: pngpriv.h
mips/filter_msa_intrinsics.o mips/filter_msa_intrinsics.pic.: pngpriv.h
intel/intel_init.o intel/intel_init.pic.: pngpriv.h
intel/filter_sse2_intrinsics.o intel/filter_sse2_intrinsics.pic.: pngpriv.h
powerpc/powerpc_init.o powerpc/powerpc_init.pic.: pngpriv.h
powerpc/filter_vsx_intrinsics.o powerpc/filter_vsx_intrinsics.pic.: pngpriv.h
pngtest.o: png.h pngconf.h pnglibconf.h

2
scripts/makefile.msys
View File

@ -18,7 +18,7 @@ exec_prefix=$(prefix)
# Library name: # Library name:
LIBNAME = libpng16 LIBNAME = libpng16
PNGMAJ = 16 PNGMAJ = 16
RELEASE = 30 RELEASE = 31
# Shared library names: # Shared library names:
LIBSO=$(LIBNAME).dll LIBSO=$(LIBNAME).dll

2
scripts/makefile.ne12bsd
View File

@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include/libpng16
LIB= png16 LIB= png16
SHLIB_MAJOR= 0 SHLIB_MAJOR= 0
SHLIB_MINOR= 1.6.30 SHLIB_MINOR= 1.6.31
SRCS= png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \ SRCS= png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \ pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
pngwtran.c pngmem.c pngerror.c pngpread.c pngwtran.c pngmem.c pngerror.c pngpread.c

2
scripts/makefile.netbsd
View File

@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include
LIB= png LIB= png
SHLIB_MAJOR= 16 SHLIB_MAJOR= 16
SHLIB_MINOR= 1.6.30 SHLIB_MINOR= 1.6.31
SRCS= png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \ SRCS= png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \ pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
pngwtran.c pngmem.c pngerror.c pngpread.c pngwtran.c pngmem.c pngerror.c pngpread.c

2
scripts/makefile.openbsd
View File

@ -11,7 +11,7 @@ LIBDIR= ${PREFIX}/lib
MANDIR= ${PREFIX}/man/cat MANDIR= ${PREFIX}/man/cat
SHLIB_MAJOR= 16 SHLIB_MAJOR= 16
SHLIB_MINOR= 1.6.30 SHLIB_MINOR= 1.6.31
LIB= png LIB= png
SRCS= png.c pngerror.c pngget.c pngmem.c pngpread.c \ SRCS= png.c pngerror.c pngget.c pngmem.c pngpread.c \

2
scripts/pnglibconf.dfa
View File

@ -741,6 +741,8 @@ setting IDAT_READ_SIZE default PNG_ZBUF_SIZE
# Ancillary chunks # Ancillary chunks
chunk bKGD chunk bKGD
chunk cHRM enables COLORSPACE chunk cHRM enables COLORSPACE
# enable eXIf only after chunk is approved
chunk eXIf
chunk gAMA enables GAMMA chunk gAMA enables GAMMA
chunk hIST chunk hIST
chunk iCCP enables COLORSPACE, GAMMA chunk iCCP enables COLORSPACE, GAMMA

7
scripts/pnglibconf.h.prebuilt
View File

@ -1,8 +1,8 @@
/* libpng 1.6.30 STANDARD API DEFINITION */ /* libpng 1.6.31 STANDARD API DEFINITION */
/* pnglibconf.h - library build configuration */ /* pnglibconf.h - library build configuration */
/* Libpng version 1.6.30 - June 28, 2017 */ /* Libpng version 1.6.31 - July 27, 2017 */
/* Copyright (c) 1998-2017 Glenn Randers-Pehrson */ /* Copyright (c) 1998-2017 Glenn Randers-Pehrson */
@ -84,6 +84,7 @@
#define PNG_READ_USER_TRANSFORM_SUPPORTED #define PNG_READ_USER_TRANSFORM_SUPPORTED
#define PNG_READ_bKGD_SUPPORTED #define PNG_READ_bKGD_SUPPORTED
#define PNG_READ_cHRM_SUPPORTED #define PNG_READ_cHRM_SUPPORTED
#define PNG_READ_eXIf_SUPPORTED
#define PNG_READ_gAMA_SUPPORTED #define PNG_READ_gAMA_SUPPORTED
#define PNG_READ_hIST_SUPPORTED #define PNG_READ_hIST_SUPPORTED
#define PNG_READ_iCCP_SUPPORTED #define PNG_READ_iCCP_SUPPORTED
@ -153,6 +154,7 @@
#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED #define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
#define PNG_WRITE_bKGD_SUPPORTED #define PNG_WRITE_bKGD_SUPPORTED
#define PNG_WRITE_cHRM_SUPPORTED #define PNG_WRITE_cHRM_SUPPORTED
#define PNG_WRITE_eXIf_SUPPORTED
#define PNG_WRITE_gAMA_SUPPORTED #define PNG_WRITE_gAMA_SUPPORTED
#define PNG_WRITE_hIST_SUPPORTED #define PNG_WRITE_hIST_SUPPORTED
#define PNG_WRITE_iCCP_SUPPORTED #define PNG_WRITE_iCCP_SUPPORTED
@ -170,6 +172,7 @@
#define PNG_WRITE_zTXt_SUPPORTED #define PNG_WRITE_zTXt_SUPPORTED
#define PNG_bKGD_SUPPORTED #define PNG_bKGD_SUPPORTED
#define PNG_cHRM_SUPPORTED #define PNG_cHRM_SUPPORTED
#define PNG_eXIf_SUPPORTED
#define PNG_gAMA_SUPPORTED #define PNG_gAMA_SUPPORTED
#define PNG_hIST_SUPPORTED #define PNG_hIST_SUPPORTED
#define PNG_iCCP_SUPPORTED #define PNG_iCCP_SUPPORTED

4
scripts/symbols.def
View File

@ -1,4 +1,4 @@
;Version 1.6.30 ;Version 1.6.31
;-------------------------------------------------------------- ;--------------------------------------------------------------
; LIBPNG symbol list as a Win32 DEF file ; LIBPNG symbol list as a Win32 DEF file
; Contains all the symbols that can be exported from libpng ; Contains all the symbols that can be exported from libpng
@ -250,3 +250,5 @@ EXPORTS
png_get_palette_max @243 png_get_palette_max @243
png_set_option @244 png_set_option @244
png_image_write_to_memory @245 png_image_write_to_memory @245
png_get_eXIf @246
png_set_eXIf @247