From 1127ebfcd3f6f118dd1f499db1a51c5dceeddbdc Mon Sep 17 00:00:00 2001 From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com> Date: Mon, 24 Jul 2023 20:18:05 +0200 Subject: [PATCH] Upgrade bundled libpng to version 1.6.40 - cont'd --- png/ANNOUNCE | 33 ++--- png/CHANGES | 20 ++- png/INSTALL | 87 ++++++------- png/LICENSE | 4 +- png/README | 297 +++++++++++++++++++++--------------------- png/libpng-manual.txt | 10 +- png/libpng.3 | 54 ++++---- png/libpngpf.3 | 4 +- png/png.5 | 35 +---- png/pngconf.h | 8 +- png/pngpriv.h | 71 +++++----- png/pngstruct.h | 12 +- 12 files changed, 291 insertions(+), 344 deletions(-) diff --git a/png/ANNOUNCE b/png/ANNOUNCE index ecf9c7043..404cbb0de 100644 --- a/png/ANNOUNCE +++ b/png/ANNOUNCE @@ -1,5 +1,5 @@ -libpng 1.6.37 - April 14, 2019 -============================== +libpng 1.6.40 - June 21, 2023 +============================= This is a public release of libpng, intended for use in production code. @@ -9,13 +9,13 @@ Files available for download Source files with LF line endings (for Unix/Linux): - * libpng-1.6.37.tar.xz (LZMA-compressed, recommended) - * libpng-1.6.37.tar.gz + * libpng-1.6.40.tar.xz (LZMA-compressed, recommended) + * libpng-1.6.40.tar.gz Source files with CRLF line endings (for Windows): - * lp1637.7z (LZMA-compressed, recommended) - * lp1637.zip + * lpng1640.7z (LZMA-compressed, recommended) + * lpng1640.zip Other information: @@ -25,20 +25,15 @@ Other information: * TRADEMARK.md -Changes since the previous public release (version 1.6.36) ----------------------------------------------------------- +Changes from version 1.6.39 to version 1.6.40 +--------------------------------------------- - * Fixed a use-after-free vulnerability (CVE-2019-7317) in png_image_free. - * Fixed a memory leak in the ARM NEON implementation of png_do_expand_palette. - * Fixed a memory leak in pngtest.c. - * Fixed two vulnerabilities (CVE-2018-14048, CVE-2018-14550) in - contrib/pngminus; refactor. - * Changed the license of contrib/pngminus to MIT; refresh makefile and docs. - (Contributed by Willem van Schaik) - * Fixed a typo in the libpng license v2. - (Contributed by Miguel Ojeda) - * Added makefiles for AddressSanitizer-enabled builds. - * Cleaned up various makefiles. + * Fixed the eXIf chunk multiplicity checks. + * Fixed a memory leak in pCAL processing. + * Corrected the validity report about tRNS inside png_get_valid(). + * Fixed various build issues on *BSD, Mac and Windows. + * Updated the configurations and the scripts for continuous integration. + * Cleaned up the code, the build scripts, and the documentation. Send comments/corrections/commendations to png-mng-implement at lists.sf.net. diff --git a/png/CHANGES b/png/CHANGES index 366e0f6a7..2d8c585c0 100644 --- a/png/CHANGES +++ b/png/CHANGES @@ -204,7 +204,7 @@ Version 0.97 [January, 1998] Added simple sRGB support (Glenn R-P) Easier conditional compiling, e.g., define PNG_READ/WRITE_NOT_FULLY_SUPPORTED; - all configurable options can be selected from command-line instead + all configurable options can be selected from command line instead of having to edit pngconf.h (Glenn R-P) Fixed memory leak in pngwrite.c (free info_ptr->text) (Glenn R-P) Added more conditions for png_do_background, to avoid changing @@ -942,7 +942,7 @@ Version 1.0.8 [July 24, 2000] Version 1.0.9beta1 [November 10, 2000] Fixed typo in scripts/makefile.hpux Updated makevms.com in scripts and contrib/* and contrib/* (Martin Zinser) - Fixed seqence-point bug in contrib/pngminus/png2pnm (Martin Zinser) + Fixed sequence-point bug in contrib/pngminus/png2pnm (Martin Zinser) Changed "cdrom.com" in documentation to "libpng.org" Revised pnggccrd.c to get it all working, and updated makefile.gcmmx (Greg). Changed type of "params" from voidp to png_voidp in png_read|write_png(). @@ -2295,7 +2295,7 @@ Version 1.4.0beta58 [May 14, 2009] Clarified usage of sig_bit versus sig_bit_p in example.c (Vincent Torri) Version 1.4.0beta59 [May 15, 2009] - Reformated sources in libpng style (3-space indentation, comment format) + Reformatted sources in libpng style (3-space indentation, comment format) Fixed typo in libpng docs (PNG_FILTER_AVE should be PNG_FILTER_AVG) Added sections about the git repository and our coding style to the documentation @@ -2661,7 +2661,7 @@ Version 1.4.1beta06 [January 28, 2010] Version 1.4.1beta07 [February 6, 2010] Folded some long lines in the source files. - Added defineable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX, + Added definable PNG_USER_CHUNK_CACHE_MAX, PNG_USER_CHUNK_MALLOC_MAX, and a PNG_USER_LIMITS_SUPPORTED flag. Eliminated use of png_ptr->irowbytes and reused the slot in png_ptr as png_ptr->png_user_chunk_malloc_max. @@ -3919,7 +3919,7 @@ Version 1.6.0beta08 [February 1, 2012] version checking to configure.ac Improved pngstest speed by not doing redundant tests and add const to the background parameter of png_image_finish_read. The --background - option is now done automagically only when required, so that commandline + option is now done automagically only when required, so that command-line option no longer exists. Cleaned up pngpriv.h to consistently declare all functions and data. Also eliminated PNG_CONST_DATA, which is apparently not needed but we @@ -5927,7 +5927,7 @@ Version 1.6.32beta03 [August 2, 2017] (Bug report from the OSS-fuzz project). Version 1.6.32beta04 [August 2, 2017] - Replaced local eXIf_buf with info_ptr-eXIf_buf in png_handle_eXIf(). + Replaced local eXIf_buf with info_ptr->eXIf_buf in png_handle_eXIf(). Update libpng.3 and libpng-manual.txt about eXIf functions. Version 1.6.32beta05 [August 2, 2017] @@ -6121,6 +6121,14 @@ Version 1.6.39 [November 20, 2022] removed the obsolete makefile.cegcc. Cleaned up the code and updated the internal documentation. +Version 1.6.40 [June 21, 2023] + Fixed the eXIf chunk multiplicity checks. + Fixed a memory leak in pCAL processing. + Corrected the validity report about tRNS inside png_get_valid(). + Fixed various build issues on *BSD, Mac and Windows. + Updated the configurations and the scripts for continuous integration. + Cleaned up the code, the build scripts, and the documentation. + Send comments/corrections/commendations to png-mng-implement at lists.sf.net. Subscription is required; visit https://lists.sourceforge.net/lists/listinfo/png-mng-implement diff --git a/png/INSTALL b/png/INSTALL index 4c1702251..042d72929 100644 --- a/png/INSTALL +++ b/png/INSTALL @@ -128,16 +128,18 @@ Your directory structure should look like this: README *.h, *.c => libpng source files CMakeLists.txt => "cmake" script + ci + ci_*.sh configuration files: configure.ac, configure, Makefile.am, Makefile.in, autogen.sh, config.guess, ltmain.sh, missing, libpng.pc.in, libpng-config.in, aclocal.m4, config.h.in, config.sub, - depcomp, install-sh, mkinstalldirs, test-pngtest.sh + depcomp, install-sh, mkinstalldirs, test-pngtest.sh, etc. contrib arm-neon, conftest, examples, gregbook, libtests, pngminim, pngminus, pngsuite, tools, visupng projects - cbuilder5, owatcom, visualc71, vstudio, xcode + owatcom, visualc71, vstudio scripts makefile.* *.def (module definition files) @@ -145,7 +147,7 @@ Your directory structure should look like this: pngtest.png etc. zlib - README, *.h, *.c contrib, etc. + README, *.h, *.c, contrib, etc. If the line endings in the files look funny, you may wish to get the other distribution of libpng. It is available in both tar.gz (UNIX style line @@ -153,28 +155,27 @@ endings) and zip (DOS style line endings) formats. VI. Building with project files -If you are building libpng with MSVC, you can enter the -libpng projects\visualc71 or vstudio directory and follow the instructions -in README.txt. +If you are building libpng with Microsoft Visual Studio, you can enter +the directory projects\visualc71 or projects\vstudio and follow the +instructions in README.txt. -Otherwise enter the zlib directory and follow the instructions in zlib/README, -then come back here and run "configure" or choose the appropriate -makefile.sys in the scripts directory. +Otherwise, enter the zlib directory and follow the instructions in +zlib/README, then come back here and run "configure" or choose the +appropriate makefile in the scripts directory. VII. Building with makefiles Copy the file (or files) that you need from the scripts directory into this directory, for example -MSDOS example: - - copy scripts\makefile.msc makefile - copy scripts\pnglibconf.h.prebuilt pnglibconf.h - UNIX example: - cp scripts/makefile.std makefile - cp scripts/pnglibconf.h.prebuilt pnglibconf.h + cp scripts/makefile.std Makefile + make + +Windows example: + + nmake -f scripts\makefile.vcwin32 Read the makefile to see if you need to change any source or target directories to match your preferences. @@ -191,36 +192,33 @@ test. For more confidence, you can run another test by typing Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare your output with the result shown in contrib/pngsuite/README. -Most of the makefiles will allow you to run "make install" to -put the library in its final resting place (if you want to -do that, run "make install" in the zlib directory first if necessary). -Some also allow you to run "make test-installed" after you have -run "make install". +Most of the makefiles used to allow you to run "make install" to put +the library in its final resting place, but that feature is no longer +supported. The only tested and supported manners to install libpng are +the conventional build and install procedures driven by the configure +script or by the CMake file. -VIII. Configuring libpng for 16-bit platforms +VIII. Configuring for DOS and other 16-bit platforms -You will want to look into zconf.h to tell zlib (and thus libpng) that -it cannot allocate more than 64K at a time. Even if you can, the memory -won't be accessible. So limit zlib and libpng to 64K by defining MAXSEG_64K. - -IX. Configuring for DOS +Officially, the support for 16-bit platforms has been removed. For DOS users who only have access to the lower 640K, you will have to limit zlib's memory usage via a png_set_compression_mem_level() call. See zlib.h or zconf.h in the zlib library for more information. -X. Configuring for Medium Model +You may be or may not be in luck if you target the "large" memory model, +but all the smaller models ("small", "compact" and "medium") are known +to be unworkable. For DOS users who have access beyond the lower 640K, +a "flat" 32-bit DOS model (such as DJGPP) is strongly recommended. -Libpng's support for medium model has been tested on most of the popular -compilers. Make sure MAXSEG_64K gets defined, USE_FAR_KEYWORD gets -defined, and FAR gets defined to far in pngconf.h, and you should be -all set. Everything in the library (except for zlib's structure) is -expecting far data. You must use the typedefs with the p or pp on -the end for pointers (or at least look at them and be careful). Make -note that the rows of data are defined as png_bytepp, which is -an "unsigned char far * far *". +For DOS users who only have access to the lower 640K, you will have to +limit zlib's memory usage via a png_set_compression_mem_level() call. +You will also have to look into zconf.h to tell zlib (and thus libpng) +that it cannot allocate more than 64K at a time. Even if you can, the +memory won't be accessible. Therefore, you should limit zlib and libpng +to 64K by defining MAXSEG_64K. -XI. Prepending a prefix to exported symbols +IX. Prepending a prefix to exported symbols Starting with libpng-1.6.0, you can configure libpng (when using the "configure" script) to prefix all exported symbols by means of the @@ -231,7 +229,7 @@ identifier). This creates a set of macros in pnglibconf.h, so this is transparent to applications; their function calls get transformed by the macros to use the modified names. -XII. Configuring for compiler xxx: +X. Configuring for compiler xxx: All includes for libpng are in pngconf.h. If you need to add, change or delete an include, this is the place to do it. @@ -243,7 +241,7 @@ As of libpng-1.5.0, pngpriv.h also includes three other private header files, pngstruct.h, pnginfo.h, and pngdebug.h, which contain material that previously appeared in the public headers. -XIII. Removing unwanted object code +XI. Removing unwanted object code There are a bunch of #define's in pngconf.h that control what parts of libpng are compiled. All the defines end in _SUPPORTED. If you are @@ -282,7 +280,7 @@ 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 those sections that are actually used will be loaded into memory. -XIV. Enabling or disabling hardware optimizations +XII. Enabling or disabling hardware optimizations Certain hardware capabilities, such as the Intel SSE instructions, are normally detected at run time. Enable them with configure options @@ -332,7 +330,7 @@ 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 +XIII. 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 file and in the GIT repository logs. These will be of no concern to the vast @@ -423,7 +421,7 @@ $PREFIX/include directory). Do not edit pnglibconf.h after you have built libpng, because than the settings would not accurately reflect the settings that were used to build libpng. -XVI. Setjmp/longjmp issues +XIV. Setjmp/longjmp issues 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 @@ -441,7 +439,7 @@ This requires setjmp/longjmp, so you must either build the library with PNG_SETJMP_SUPPORTED defined, or with PNG_SIMPLIFIED_READ_SUPPORTED and PNG_SIMPLIFIED_WRITE_SUPPORTED undefined. -XVII. Common linking failures +XV. Common linking failures If your application fails to find libpng or zlib entries while linking: @@ -453,12 +451,13 @@ If your application fails to find libpng or zlib entries while linking: If you are using the vstudio project, observe the WARNING in project/vstudio/README.txt. -XVIII. Other sources of information about libpng: +XVI. Other sources of information about libpng: Further information can be found in the README and libpng-manual.txt files, in the individual makefiles, in png.h, and the manual pages libpng.3 and png.5. +Copyright (c) 2022 Cosmin Truta Copyright (c) 1998-2002,2006-2016 Glenn Randers-Pehrson This document is released under the libpng license. For conditions of distribution and use, see the disclaimer diff --git a/png/LICENSE b/png/LICENSE index e0c5b531c..086d1c2fd 100644 --- a/png/LICENSE +++ b/png/LICENSE @@ -4,8 +4,8 @@ COPYRIGHT NOTICE, DISCLAIMER, and LICENSE PNG Reference Library License version 2 --------------------------------------- - * Copyright (c) 1995-2019 The PNG Reference Library Authors. - * Copyright (c) 2018-2019 Cosmin Truta. + * Copyright (c) 1995-2023 The PNG Reference Library Authors. + * Copyright (c) 2018-2023 Cosmin Truta. * Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson. * Copyright (c) 1996-1997 Andreas Dilger. * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. diff --git a/png/README b/png/README index cfc1f0e3d..dedd2c163 100644 --- a/png/README +++ b/png/README @@ -1,57 +1,88 @@ -README for libpng version 1.6.37 - April 14, 2019 -================================================= +README for libpng version 1.6.40 +================================ -See the note about version numbers near the top of png.h. -See INSTALL for instructions on how to install libpng. +See the note about version numbers near the top of `png.h`. +See `INSTALL` for instructions on how to install libpng. -Libpng comes in several distribution formats. Get libpng-*.tar.gz or -libpng-*.tar.xz or if you want UNIX-style line endings in the text -files, or lpng*.7z or lpng*.zip if you want DOS-style line endings. +Libpng comes in several distribution formats. Get `libpng-*.tar.gz` +or `libpng-*.tar.xz` if you want UNIX-style line endings in the text +files, or `lpng*.7z` or `lpng*.zip` if you want DOS-style line endings. -Version 0.89 was the first official release of libpng. Don't let the -fact that it's the first release fool you. The libpng library has been -in extensive use and testing since mid-1995. By late 1997 it had -finally gotten to the stage where there hadn't been significant -changes to the API in some time, and people have a bad feeling about -libraries with versions < 1.0. Version 1.0.0 was released in -March 1998. +For a detailed description on using libpng, read `libpng-manual.txt`. +For examples of libpng in a program, see `example.c` and `pngtest.c`. +For usage information and restrictions (what little they are) on libpng, +see `png.h`. For a description on using zlib (the compression library +used by libpng) and zlib's restrictions, see `zlib.h`. -**** -Note that some of the changes to the png_info structure render this +You should use zlib 1.0.4 or later to run this, but it _may_ work with +versions as old as zlib 0.95. Even so, there are bugs in older zlib +versions which can cause the output of invalid compression streams for +some images. + +You should also note that zlib is a compression library that is useful +for more things than just PNG files. You can use zlib as a drop-in +replacement for `fread()` and `fwrite()`, if you are so inclined. + +zlib should be available at the same place that libpng is, or at +https://zlib.net . + +You may also want a copy of the PNG specification. It is available +as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find +these at http://www.libpng.org/pub/png/pngdocs.html . + +This code is currently being archived at https://libpng.sourceforge.io +in the download area, and at http://libpng.download/src . + +This release, based in a large way on Glenn's, Guy's and Andreas' +earlier work, was created and will be supported by myself and the PNG +development group. + +Send comments, corrections and commendations to `png-mng-implement` +at `lists.sourceforge.net`. (Subscription is required; visit +https://lists.sourceforge.net/lists/listinfo/png-mng-implement +to subscribe.) + +Send general questions about the PNG specification to `png-mng-misc` +at `lists.sourceforge.net`. (Subscription is required; visit +https://lists.sourceforge.net/lists/listinfo/png-mng-misc +to subscribe.) + +Historical notes +---------------- + +The libpng library has been in extensive use and testing since mid-1995. +Version 0.89, published a year later, was the first official release. +By late 1997, it had finally gotten to the stage where there hadn't +been significant changes to the API in some time, and people have a bad +feeling about libraries with versions below 1.0. Version 1.0.0 was +released in March 1998. + +Note that some of the changes to the `png_info` structure render this version of the library binary incompatible with libpng-0.89 or earlier versions if you are using a shared library. The type of the -"filler" parameter for png_set_filler() has changed from png_byte to -png_uint_32, which will affect shared-library applications that use -this function. +`filler` parameter for `png_set_filler()` has changed from `png_byte` +to `png_uint_32`, which will affect shared-library applications that +use this function. -To avoid problems with changes to the internals of the png info_struct, +To avoid problems with changes to the internals of the `info_struct`, new APIs have been made available in 0.95 to avoid direct application -access to info_ptr. These functions are the png_set_ and -png_get_ functions. These functions should be used when -accessing/storing the info_struct data, rather than manipulating it +access to `info_ptr`. These functions are the `png_set_` and +`png_get_` functions. These functions should be used when +accessing/storing the `info_struct` data, rather than manipulating it directly, to avoid such problems in the future. It is important to note that the APIs did not make current programs that access the info struct directly incompatible with the new library, through libpng-1.2.x. In libpng-1.4.x, which was meant to -be a transitional release, members of the png_struct and the -info_struct can still be accessed, but the compiler will issue a +be a transitional release, members of the `png_struct` and the +`info_struct` can still be accessed, but the compiler will issue a warning about deprecated usage. Since libpng-1.5.0, direct access to these structs is not allowed, and the definitions of the structs -reside in private pngstruct.h and pnginfo.h header files that are not -accessible to applications. It is strongly suggested that new -programs use the new APIs (as shown in example.c and pngtest.c), and -older programs be converted to the new format, to facilitate upgrades -in the future. -**** - -Additions since 0.90 include the ability to compile libpng as a -Windows DLL, and new APIs for accessing data in the info struct. -Experimental functions include the ability to set weighting and cost -factors for row filter selection, direct reads of integers from buffers -on big-endian processors that support misaligned data access, faster -methods of doing alpha composition, and more accurate 16->8 bit color -conversion. +reside in private `pngstruct.h` and `pnginfo.h` header files that are +not accessible to applications. It is strongly suggested that new +programs use the new APIs (as shown in `example.c` and `pngtest.c`), +and older programs be converted to the new format, to facilitate +upgrades in the future. The additions since 0.89 include the ability to read from a PNG stream which has had some (or all) of the signature bytes read by the calling @@ -61,118 +92,86 @@ the library action on the detection of chunk CRC errors. It is possible to set different actions based on whether the CRC error occurred in a critical or an ancillary chunk. -For a detailed description on using libpng, read libpng-manual.txt. -For examples of libpng in a program, see example.c and pngtest.c. For -usage information and restrictions (what little they are) on libpng, -see png.h. For a description on using zlib (the compression library -used by libpng) and zlib's restrictions, see zlib.h +The additions since 0.90 include the ability to compile libpng as a +Windows DLL, and new APIs for accessing data in the `info_struct`. +Experimental functions included the ability to set weighting and cost +factors for row filter selection, direct reads of integers from buffers +on big-endian processors that support misaligned data access, faster +methods of doing alpha composition, and more accurate 16-to-8 bit color +conversion. Some of these experimental functions, such as the weighted +filter heuristics, have since been removed. -I have included a general makefile, as well as several machine and -compiler specific ones, but you may have to modify one for your own -needs. +Files included in this distribution +----------------------------------- -You should use zlib 1.0.4 or later to run this, but it MAY work with -versions as old as zlib 0.95. Even so, there are bugs in older zlib -versions which can cause the output of invalid compression streams for -some images. - -You should also note that zlib is a compression library that is useful -for more things than just PNG files. You can use zlib as a drop-in -replacement for fread() and fwrite(), if you are so inclined. - -zlib should be available at the same place that libpng is, or at -https://zlib.net. - -You may also want a copy of the PNG specification. It is available -as an RFC, a W3C Recommendation, and an ISO/IEC Standard. You can find -these at http://www.libpng.org/pub/png/pngdocs.html . - -This code is currently being archived at libpng.sourceforge.io in the -[DOWNLOAD] area, and at http://libpng.download/src . - -This release, based in a large way on Glenn's, Guy's and Andreas' -earlier work, was created and will be supported by myself and the PNG -development group. - -Send comments/corrections/commendations to png-mng-implement at -lists.sourceforge.net (subscription required; visit -https://lists.sourceforge.net/lists/listinfo/png-mng-implement -to subscribe). - -Send general questions about the PNG specification to png-mng-misc -at lists.sourceforge.net (subscription required; visit -https://lists.sourceforge.net/lists/listinfo/png-mng-misc to -subscribe). - -Files in this distribution: - - ANNOUNCE => Announcement of this version, with recent changes - AUTHORS => List of contributing authors - CHANGES => Description of changes between libpng versions - KNOWNBUG => List of known bugs and deficiencies - LICENSE => License to use and redistribute libpng - README => This file - TODO => Things not implemented in the current library - TRADEMARK => Trademark information - example.c => Example code for using libpng functions - libpng.3 => manual page for libpng (includes libpng-manual.txt) - libpng-manual.txt => Description of libpng and its functions - libpngpf.3 => manual page for libpng's private functions - png.5 => manual page for the PNG format - png.c => Basic interface functions common to library - png.h => Library function and interface declarations (public) - pngpriv.h => Library function and interface declarations (private) - pngconf.h => System specific library configuration (public) - pngstruct.h => png_struct declaration (private) - pnginfo.h => png_info struct declaration (private) - pngdebug.h => debugging macros (private) - pngerror.c => Error/warning message I/O functions - pngget.c => Functions for retrieving info from struct - pngmem.c => Memory handling functions - pngbar.png => PNG logo, 88x31 - pngnow.png => PNG logo, 98x31 - pngpread.c => Progressive reading functions - pngread.c => Read data/helper high-level functions - pngrio.c => Lowest-level data read I/O functions - pngrtran.c => Read data transformation functions - pngrutil.c => Read data utility functions - pngset.c => Functions for storing data into the info_struct - pngtest.c => Library test program - pngtest.png => Library test sample image - pngtrans.c => Common data transformation functions - pngwio.c => Lowest-level write I/O functions - pngwrite.c => High-level write functions - pngwtran.c => Write data transformations - pngwutil.c => Write utility functions - arm => Contains optimized code for the ARM platform - powerpc => Contains optimized code for the PowerPC platform - contrib => Contributions - arm-neon => Optimized code for ARM-NEON platform - powerpc-vsx => Optimized code for POWERPC-VSX platform - examples => Example programs - gregbook => source code for PNG reading and writing, from - Greg Roelofs' "PNG: The Definitive Guide", - O'Reilly, 1999 - libtests => Test programs - mips-msa => Optimized code for MIPS-MSA platform - pngminim => Minimal decoder, encoder, and progressive decoder - programs demonstrating use of pngusr.dfa - pngminus => Simple pnm2png and png2pnm programs - pngsuite => Test images - testpngs - tools => Various tools - visupng => Contains a MSVC workspace for VisualPng - intel => Optimized code for INTEL-SSE2 platform - mips => Optimized code for MIPS platform - projects => Contains project files and workspaces for - building a DLL - owatcom => Contains a WATCOM project for building libpng - visualc71 => Contains a Microsoft Visual C++ (MSVC) - workspace for building libpng and zlib - vstudio => Contains a Microsoft Visual C++ (MSVC) - workspace for building libpng and zlib - scripts => Directory containing scripts for building libpng: - (see scripts/README.txt for the list of scripts) + ANNOUNCE => Announcement of this version, with recent changes + AUTHORS => List of contributing authors + CHANGES => Description of changes between libpng versions + INSTALL => Instructions to install libpng + LICENSE => License to use and redistribute libpng + README => This file + TODO => Things not implemented in the current library + TRADEMARK => Trademark information + example.c => Example code for using libpng functions + libpng.3 => Manual page for libpng (includes libpng-manual.txt) + libpng-manual.txt => Description of libpng and its functions + libpngpf.3 => Manual page for libpng's private functions (deprecated) + png.5 => Manual page for the PNG format + png.c => Basic interface functions common to library + png.h => Library function and interface declarations (public) + pngpriv.h => Library function and interface declarations (private) + pngconf.h => System specific library configuration (public) + pngstruct.h => png_struct declaration (private) + pnginfo.h => png_info struct declaration (private) + pngdebug.h => debugging macros (private) + pngerror.c => Error/warning message I/O functions + pngget.c => Functions for retrieving info from struct + pngmem.c => Memory handling functions + pngbar.png => PNG logo, 88x31 + pngnow.png => PNG logo, 98x31 + pngpread.c => Progressive reading functions + pngread.c => Read data/helper high-level functions + pngrio.c => Lowest-level data read I/O functions + pngrtran.c => Read data transformation functions + pngrutil.c => Read data utility functions + pngset.c => Functions for storing data into the info_struct + pngtest.c => Library test program + pngtest.png => Library test sample image + pngtrans.c => Common data transformation functions + pngwio.c => Lowest-level write I/O functions + pngwrite.c => High-level write functions + pngwtran.c => Write data transformations + pngwutil.c => Write utility functions + arm/ => Optimized code for the ARM platform + intel/ => Optimized code for the INTEL-SSE2 platform + mips/ => Optimized code for the MIPS platform + powerpc/ => Optimized code for the PowerPC platform + ci/ => Scripts for continuous integration + contrib/ => External contributions + arm-neon/ => Optimized code for the ARM-NEON platform + mips-msa/ => Optimized code for the MIPS-MSA platform + powerpc-vsx/ => Optimized code for the POWERPC-VSX platform + examples/ => Examples of libpng usage + gregbook/ => Source code for PNG reading and writing, from + "PNG: The Definitive Guide" by Greg Roelofs, + O'Reilly, 1999 + libtests/ => Test programs + oss-fuzz/ => Files used by the OSS-Fuzz project for fuzz-testing + libpng + pngminim/ => Minimal decoder, encoder, and progressive decoder + programs demonstrating the use of pngusr.dfa + pngminus/ => Simple pnm2png and png2pnm programs + pngsuite/ => Test images + testpngs/ => Test images + tools/ => Various tools + visupng/ => VisualPng, a Windows viewer for PNG images + projects/ => Project files and workspaces for various IDEs + owatcom/ => OpenWatcom project + visualc71/ => Microsoft Visual C++ 7.1 workspace + vstudio/ => Microsoft Visual Studio workspace + scripts/ => Scripts and makefiles for building libpng + (see scripts/README.txt for the complete list) + tests/ => Test scripts Good luck, and happy coding! diff --git a/png/libpng-manual.txt b/png/libpng-manual.txt index 5dad92fbf..67b507882 100644 --- a/png/libpng-manual.txt +++ b/png/libpng-manual.txt @@ -1,6 +1,6 @@ libpng-manual.txt - A description on how to use and modify libpng - Copyright (c) 2018-2019 Cosmin Truta + Copyright (c) 2018-2023 Cosmin Truta Copyright (c) 1998-2018 Glenn Randers-Pehrson This document is released under the libpng license. @@ -9,9 +9,9 @@ libpng-manual.txt - A description on how to use and modify libpng Based on: - libpng version 1.6.36, December 2018, through 1.6.37 - April 2019 + libpng version 1.6.36, December 2018, through 1.6.40 - June 2023 Updated and distributed by Cosmin Truta - Copyright (c) 2018-2019 Cosmin Truta + Copyright (c) 2018-2023 Cosmin Truta libpng versions 0.97, January 1998, through 1.6.35 - July 2018 Updated and distributed by Glenn Randers-Pehrson @@ -877,7 +877,7 @@ described below (the latter being the two common names for associated alpha color channels). Note that PNG files always contain non-associated color channels; png_set_alpha_mode() with one of the modes causes the decoder to convert the pixels to an associated form before returning them to your -application. +application. Since it is not necessary to perform arithmetic on opaque color values so long as they are not to be resampled and are in the final color space it is @@ -1792,7 +1792,7 @@ the information. If, instead, you want to convert the image to an opaque version with no alpha channel use png_set_background; see below. As of libpng version 1.5.2, almost all useful expansions are supported, the -major ommissions are conversion of grayscale to indexed images (which can be +major omissions are conversion of grayscale to indexed images (which can be done trivially in the application) and conversion of indexed to grayscale (which can be done by a trivial manipulation of the palette.) diff --git a/png/libpng.3 b/png/libpng.3 index f37423540..003bfaf6c 100644 --- a/png/libpng.3 +++ b/png/libpng.3 @@ -1,6 +1,6 @@ -.TH LIBPNG 3 "April 14, 2019" +.TH LIBPNG 3 "June 21, 2023" .SH NAME -libpng \- Portable Network Graphics (PNG) Reference Library 1.6.37 +libpng \- Portable Network Graphics (PNG) Reference Library 1.6.40 .SH SYNOPSIS \fB#include \fP @@ -519,7 +519,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng. .SH LIBPNG.TXT libpng-manual.txt - A description on how to use and modify libpng - Copyright (c) 2018-2019 Cosmin Truta + Copyright (c) 2018-2023 Cosmin Truta Copyright (c) 1998-2018 Glenn Randers-Pehrson This document is released under the libpng license. @@ -528,9 +528,9 @@ libpng-manual.txt - A description on how to use and modify libpng Based on: - libpng version 1.6.36, December 2018, through 1.6.37 - April 2019 + libpng version 1.6.36, December 2018, through 1.6.40 - June 2023 Updated and distributed by Cosmin Truta - Copyright (c) 2018-2019 Cosmin Truta + Copyright (c) 2018-2023 Cosmin Truta libpng versions 0.97, January 1998, through 1.6.35 - July 2018 Updated and distributed by Glenn Randers-Pehrson @@ -1396,7 +1396,7 @@ described below (the latter being the two common names for associated alpha color channels). Note that PNG files always contain non-associated color channels; png_set_alpha_mode() with one of the modes causes the decoder to convert the pixels to an associated form before returning them to your -application. +application. Since it is not necessary to perform arithmetic on opaque color values so long as they are not to be resampled and are in the final color space it is @@ -2311,7 +2311,7 @@ the information. If, instead, you want to convert the image to an opaque version with no alpha channel use png_set_background; see below. As of libpng version 1.5.2, almost all useful expansions are supported, the -major ommissions are conversion of grayscale to indexed images (which can be +major omissions are conversion of grayscale to indexed images (which can be done trivially in the application) and conversion of indexed to grayscale (which can be done by a trivial manipulation of the palette.) @@ -5995,35 +5995,25 @@ letter, until version 1.0.6j; from then on they were given the upcoming public release number plus "betaNN" or "rcNN". .SH "SEE ALSO" -.IR libpngpf(3) ", " png(5) -.LP -.IR libpng : +.BR "png"(5) .IP -https://libpng.sourceforge.io/ (follow the [DOWNLOAD] link) -http://www.libpng.org/pub/png - +The PNG (Portable Network Graphics) format specification. .LP -.IR zlib : +.B libpng .IP -(generally) at the same location as -.I libpng -or at +http://www.libpng.org/pub/png/libpng.html (canonical home page) .br -https://zlib.net/ - +https://github.com/pnggroup/libpng (canonical Git repository) +.br +https://libpng.sourceforge.io (downloadable archives) .LP -.IR PNG specification: RFC 2083 +.B zlib .IP -(generally) at the same location as -.I libpng -or at +https://zlib.net (canonical home page) .br -https://www.ietf.org/rfc/rfc2083.txt +https://github.com/madler/zlib (canonical Git repository) .br -or (as a W3C Recommendation) at -.br -https://www.w3.org/TR/REC-png.html - +A copy of zlib may also be found at the same location as libpng. .LP In the case of any inconsistency between the PNG specification and this library, the specification takes precedence. @@ -6043,10 +6033,10 @@ Libpng: Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc. Maintained by Cosmin Truta. -Supported by the PNG development group +Supported by the PNG development group. .br -png-mng-implement at lists.sourceforge.net (subscription required; visit -https://lists.sourceforge.net/lists/listinfo/png-mng-implement -to subscribe). +png-mng-implement at lists.sourceforge.net. (Subscription is required; +visit https://lists.sourceforge.net/lists/listinfo/png-mng-implement +to subscribe.) .\" end of man page diff --git a/png/libpngpf.3 b/png/libpngpf.3 index 6909c70a3..43eeb9a31 100644 --- a/png/libpngpf.3 +++ b/png/libpngpf.3 @@ -1,6 +1,6 @@ -.TH LIBPNGPF 3 "April 14, 2019" +.TH LIBPNGPF 3 "June 21, 2023" .SH NAME -libpng \- Portable Network Graphics (PNG) Reference Library 1.6.37 +libpng \- Portable Network Graphics (PNG) Reference Library 1.6.40 (private functions) .SH SYNOPSIS diff --git a/png/png.5 b/png/png.5 index c2da95c45..5442ea17f 100644 --- a/png/png.5 +++ b/png/png.5 @@ -1,4 +1,4 @@ -.TH PNG 5 "April 14, 2019" +.TH PNG 5 "June 21, 2023" .SH NAME png \- Portable Network Graphics (PNG) format @@ -18,7 +18,7 @@ Also, PNG can store gamma and chromaticity data for improved color matching on heterogeneous platforms. .SH "SEE ALSO" -.BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5) +.BR "libpng"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5) .LP PNG Specification (Second Edition), November 2003: .IP @@ -43,7 +43,7 @@ or W3C Recommendation https://www.w3.org/TR/REC-png-961001 .SH AUTHORS -This man page: Cosmin Truta, Glenn Randers-Pehrson +This man page: Glenn Randers-Pehrson, Cosmin Truta .LP Portable Network Graphics (PNG) Specification (Second Edition) Information technology - Computer graphics and image processing - @@ -51,34 +51,9 @@ Portable Network Graphics (PNG): Functional specification. ISO/IEC 15948:2003 (E) (November 10, 2003): David Duce and others. .LP Portable Network Graphics (PNG) Specification Version 1.2 (July 8, 1999): -Glenn Randers-Pehrson and others (png-list). +Glenn Randers-Pehrson and others. .LP Portable Network Graphics (PNG) Specification Version 1.0 (October 1, 1996): -Thomas Boutell and others (png-list). +Thomas Boutell and others. -.SH COPYRIGHT -.LP -This man page is -.br -Copyright (c) 2018-2019 Cosmin Truta. -.br -Copyright (c) 1998-2006 Glenn Randers-Pehrson. -.br -See png.h for conditions of use and distribution. -.LP -The PNG Specification (Second Edition) is -.br -Copyright (c) 2003 W3C. (MIT, ERCIM, Keio), All Rights Reserved. -.LP -The PNG-1.2 Specification is -.br -Copyright (c) 1999 Glenn Randers-Pehrson. -.br -See the specification for conditions of use and distribution. -.LP -The PNG-1.0 Specification is -.br -Copyright (c) 1996 Massachusetts Institute of Technology. -.br -See the specification for conditions of use and distribution. .\" end of man page diff --git a/png/pngconf.h b/png/pngconf.h index 927a769db..6671e3c33 100644 --- a/png/pngconf.h +++ b/png/pngconf.h @@ -1,9 +1,9 @@ /* pngconf.h - machine-configurable file for libpng * - * libpng version 1.6.37 + * libpng version 1.6.40 * - * Copyright (c) 2018-2019 Cosmin Truta + * Copyright (c) 2018-2022 Cosmin Truta * Copyright (c) 1998-2002,2004,2006-2016,2018 Glenn Randers-Pehrson * Copyright (c) 1996-1997 Andreas Dilger * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. @@ -180,8 +180,8 @@ * compiler-specific macros to the values required to change the calling * conventions of the various functions. */ -#if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ - defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) +#if defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \ + defined(__CYGWIN__) /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or * MinGW on any architecture currently supported by Windows. Also includes * Watcom builds but these need special treatment because they are not diff --git a/png/pngpriv.h b/png/pngpriv.h index 583c26f9b..7c19373f0 100644 --- a/png/pngpriv.h +++ b/png/pngpriv.h @@ -1,7 +1,7 @@ /* pngpriv.h - private declarations for use inside libpng * - * Copyright (c) 2018-2019 Cosmin Truta + * Copyright (c) 2018-2023 Cosmin Truta * Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson * Copyright (c) 1996-1997 Andreas Dilger * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. @@ -174,7 +174,7 @@ # else /* !defined __ARM_NEON__ */ /* The 'intrinsics' code simply won't compile without this -mfpu=neon: */ -# if !defined(__aarch64__) +# if !defined(__aarch64__) && !defined(_M_ARM64) /* The assembler code currently does not work on ARM64 */ # define PNG_ARM_NEON_IMPLEMENTATION 2 # endif /* __aarch64__ */ @@ -185,6 +185,8 @@ /* Use the intrinsics code by default. */ # define PNG_ARM_NEON_IMPLEMENTATION 1 # endif +#else /* PNG_ARM_NEON_OPT == 0 */ +# define PNG_ARM_NEON_IMPLEMENTATION 0 #endif /* PNG_ARM_NEON_OPT > 0 */ #ifndef PNG_MIPS_MSA_OPT @@ -263,11 +265,15 @@ # ifndef PNG_MIPS_MSA_IMPLEMENTATION # define PNG_MIPS_MSA_IMPLEMENTATION 1 # endif +#else +# define PNG_MIPS_MSA_IMPLEMENTATION 0 #endif /* PNG_MIPS_MSA_OPT > 0 */ #if PNG_POWERPC_VSX_OPT > 0 # define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_vsx # define PNG_POWERPC_VSX_IMPLEMENTATION 1 +#else +# define PNG_POWERPC_VSX_IMPLEMENTATION 0 #endif @@ -492,16 +498,7 @@ static_cast(static_cast(value)) #else # define png_voidcast(type, value) (value) -# ifdef _WIN64 -# ifdef __GNUC__ - typedef unsigned long long png_ptruint; -# else - typedef unsigned __int64 png_ptruint; -# endif -# else - typedef unsigned long png_ptruint; -# endif -# define png_constcast(type, value) ((type)(png_ptruint)(const void*)(value)) +# define png_constcast(type, value) ((type)(void*)(const void*)(value)) # define png_aligncast(type, value) ((void*)(value)) # define png_aligncastconst(type, value) ((const void*)(value)) #endif /* __cplusplus */ @@ -543,9 +540,8 @@ # include #endif -#if defined(WIN32) || defined(_Windows) || defined(_WINDOWS) || \ - defined(_WIN32) || defined(__WIN32__) -# include /* defines _WINDOWS_ macro */ +#if defined(_WIN32) || defined(__WIN32__) || defined(__NT__) +# include #endif #endif /* PNG_VERSION_INFO_ONLY */ @@ -554,24 +550,20 @@ * functions that are passed far data must be model-independent. */ -/* Memory model/platform independent fns */ +/* Platform-independent functions */ #ifndef PNG_ABORT -# ifdef _WINDOWS_ -# define PNG_ABORT() ExitProcess(0) -# else -# define PNG_ABORT() abort() -# endif +# define PNG_ABORT() abort() #endif /* These macros may need to be architecture dependent. */ -#define PNG_ALIGN_NONE 0 /* do not use data alignment */ -#define PNG_ALIGN_ALWAYS 1 /* assume unaligned accesses are OK */ +#define PNG_ALIGN_NONE 0 /* do not use data alignment */ +#define PNG_ALIGN_ALWAYS 1 /* assume unaligned accesses are OK */ #ifdef offsetof -# define PNG_ALIGN_OFFSET 2 /* use offsetof to determine alignment */ +# define PNG_ALIGN_OFFSET 2 /* use offsetof to determine alignment */ #else # define PNG_ALIGN_OFFSET -1 /* prevent the use of this */ #endif -#define PNG_ALIGN_SIZE 3 /* use sizeof to determine alignment */ +#define PNG_ALIGN_SIZE 3 /* use sizeof to determine alignment */ #ifndef PNG_ALIGN_TYPE /* Default to using aligned access optimizations and requiring alignment to a @@ -585,26 +577,25 @@ /* This is used because in some compiler implementations non-aligned * structure members are supported, so the offsetof approach below fails. * Set PNG_ALIGN_SIZE=0 for compiler combinations where unaligned access - * is good for performance. Do not do this unless you have tested the result - * and understand it. + * is good for performance. Do not do this unless you have tested the + * result and understand it. */ -# define png_alignof(type) (sizeof (type)) +# define png_alignof(type) (sizeof(type)) #else # if PNG_ALIGN_TYPE == PNG_ALIGN_OFFSET -# define png_alignof(type) offsetof(struct{char c; type t;}, t) +# define png_alignof(type) offsetof(struct{char c; type t;}, t) # else -# if PNG_ALIGN_TYPE == PNG_ALIGN_ALWAYS -# define png_alignof(type) (1) -# endif - /* Else leave png_alignof undefined to prevent use thereof */ +# if PNG_ALIGN_TYPE == PNG_ALIGN_ALWAYS +# define png_alignof(type) 1 +# endif + /* Else leave png_alignof undefined to prevent use thereof */ # endif #endif -/* This implicitly assumes alignment is always to a power of 2. */ +/* This implicitly assumes alignment is always a multiple of 2. */ #ifdef png_alignof -# define png_isaligned(ptr, type)\ - (((type)((const char*)ptr-(const char*)0) & \ - (type)(png_alignof(type)-1)) == 0) +# define png_isaligned(ptr, type) \ + (((type)(size_t)((const void*)(ptr)) & (type)(png_alignof(type)-1)) == 0) #else # define png_isaligned(ptr, type) 0 #endif @@ -635,7 +626,7 @@ #define PNG_BACKGROUND_IS_GRAY 0x800U #define PNG_HAVE_PNG_SIGNATURE 0x1000U #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000U /* Have another chunk after IDAT */ - /* 0x4000U (unused) */ +#define PNG_WROTE_eXIf 0x4000U #define PNG_IS_READ_STRUCT 0x8000U /* Else is a write struct */ /* Flags for the transformations the PNG library does on the image data */ @@ -1919,7 +1910,7 @@ PNG_INTERNAL_FUNCTION(void,png_ascii_from_fixed,(png_const_structrp png_ptr, */ #define PNG_FP_INVALID 512 /* Available for callers as a distinct value */ -/* Result codes for the parser (boolean - true meants ok, false means +/* Result codes for the parser (boolean - true means ok, false means * not ok yet.) */ #define PNG_FP_MAYBE 0 /* The number may be valid in the future */ @@ -1955,7 +1946,7 @@ PNG_INTERNAL_FUNCTION(void,png_ascii_from_fixed,(png_const_structrp png_ptr, * the problem character.) This has not been tested within libpng. */ PNG_INTERNAL_FUNCTION(int,png_check_fp_number,(png_const_charp string, - size_t size, int *statep, png_size_tp whereami),PNG_EMPTY); + size_t size, int *statep, size_t *whereami),PNG_EMPTY); /* This is the same but it checks a complete string and returns true * only if it just contains a floating point number. As of 1.5.4 this diff --git a/png/pngstruct.h b/png/pngstruct.h index 8bdc7ce46..e591d94d5 100644 --- a/png/pngstruct.h +++ b/png/pngstruct.h @@ -1,7 +1,7 @@ /* pngstruct.h - header file for PNG reference library * - * Copyright (c) 2018-2019 Cosmin Truta + * Copyright (c) 2018-2022 Cosmin Truta * Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson * Copyright (c) 1996-1997 Andreas Dilger * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. @@ -334,18 +334,8 @@ struct png_struct_def size_t current_buffer_size; /* amount of data now in current_buffer */ int process_mode; /* what push library is currently doing */ int cur_palette; /* current push library palette index */ - #endif /* PROGRESSIVE_READ */ -#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) -/* For the Borland special 64K segment handler */ - png_bytepp offset_table_ptr; - png_bytep offset_table; - png_uint_16 offset_table_number; - png_uint_16 offset_table_count; - png_uint_16 offset_table_count_free; -#endif - #ifdef PNG_READ_QUANTIZE_SUPPORTED png_bytep palette_lookup; /* lookup table for quantizing */ png_bytep quantize_index; /* index translation for palette files */