Update libpng to 1.6.43 (also required for zlib to build)

Author: Dutchman101

vendor/libpng/ANNOUNCE

@@ -1,5 +1,5 @@
-libpng 1.6.40 - June 21, 2023
-=============================
+libpng 1.6.43 - February 23, 2024
+=================================
 
 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-1.6.40.tar.xz (LZMA-compressed, recommended)
- * libpng-1.6.40.tar.gz
+ * libpng-1.6.43.tar.xz (LZMA-compressed, recommended)
+ * libpng-1.6.43.tar.gz (deflate-compressed)
 
 Source files with CRLF line endings (for Windows):
 
- * lpng1640.7z (LZMA-compressed, recommended)
- * lpng1640.zip
+ * lpng1643.7z (LZMA-compressed, recommended)
+ * lpng1643.zip (deflate-compressed)
 
 Other information:
 
@@ -25,15 +25,36 @@ Other information:
  * TRADEMARK.md
 
 
-Changes from version 1.6.39 to version 1.6.40
+Changes from version 1.6.42 to version 1.6.43
 ---------------------------------------------
 
- * 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.
+ * Fixed the row width check in png_check_IHDR().
+   This corrected a bug that was specific to the 16-bit platforms,
+   and removed a spurious compiler warning from the 64-bit builds.
+   (Reported by Jacek Caban; fixed by John Bowler)
+ * Added eXIf chunk support to the push-mode reader in pngpread.c.
+   (Contributed by Chris Blume)
+ * Added contrib/pngexif for the benefit of the users who would like
+   to inspect the content of eXIf chunks.
+ * Added contrib/conftest/basic.dfa, a basic build-time configuration.
+   (Contributed by John Bowler)
+ * Fixed a preprocessor condition in pngread.c that broke build-time
+   configurations like contrib/conftest/pngcp.dfa.
+   (Contributed by John Bowler)
+ * Added CMake build support for LoongArch LSX.
+   (Contributed by GuXiWei)
+ * Fixed a CMake build error that occurred under a peculiar state of the
+   dependency tree. This was a regression introduced in libpng-1.6.41.
+   (Contributed by Dan Rosser)
+ * Marked the installed libpng headers as system headers in CMake.
+   (Contributed by Benjamin Buch)
+ * Updated the build support for RISCOS.
+   (Contributed by Cameron Cawley)
+ * Updated the makefiles to allow cross-platform builds to initialize
+   conventional make variables like AR and ARFLAGS.
+ * Added various improvements to the CI scripts in areas like version
+   consistency verification and text linting.
+ * Added version consistency verification to pngtest.c also.
 
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net.

vendor/libpng/AUTHORS

@@ -4,7 +4,9 @@ PNG REFERENCE LIBRARY AUTHORS
 This is the list of PNG Reference Library ("libpng") Contributing
 Authors, for copyright and licensing purposes.
 
+ * Adam Richter
  * Andreas Dilger
+ * Chris Blume
  * Cosmin Truta
  * Dave Martindale
  * Eric S. Raymond
@@ -33,20 +35,27 @@ Authors, for copyright and licensing purposes.
  * Vadim Barkov
  * Willem van Schaik
  * Zhijie Liang
+ * Apple Inc.
+    - Zixu Wang (王子旭)
  * Arm Holdings
-   - Richard Townsend
+    - Richard Townsend
  * Google Inc.
-   - Dan Field
-   - Leon Scroggins III
-   - Matt Sarett
-   - Mike Klein
-   - Sami Boukortt
-   - Wan-Teh Chang
+    - Dan Field
+    - Leon Scroggins III
+    - Matt Sarett
+    - Mike Klein
+    - Sami Boukortt
+    - Wan-Teh Chang
+ * Loongson Technology Corporation Ltd.
+    - GuXiWei (顾希伟)
+    - JinBo (金波)
+    - ZhangLixia (张利霞)
 
 The build projects, the build scripts, the test scripts, and other
-files in the "ci", "projects", "scripts" and "tests" directories, have
+files in the "projects", "scripts" and "tests" directories, have
 other copyright owners, but are released under the libpng license.
 
-Some files in the "contrib" directory, and some tools-generated files
-that are distributed with libpng, have other copyright owners, and are
-released under other open source licenses.
+Some files in the "ci" and "contrib" directories, as well as some
+of the tools-generated files that are distributed with libpng, have
+other copyright owners, and are released under other open source
+licenses.

vendor/libpng/CHANGES

@@ -6129,6 +6129,73 @@ Version 1.6.40 [June 21, 2023]
   Updated the configurations and the scripts for continuous integration.
   Cleaned up the code, the build scripts, and the documentation.
 
+Version 1.6.41 [January 24, 2024]
+  Added SIMD-optimized code for the LoongArch LSX hardware.
+    (Contributed by GuXiWei, JinBo and ZhangLixia)
+  Fixed the run-time discovery of MIPS MSA hardware.
+    (Contributed by Sui Jingfeng)
+  Fixed an off-by-one error in the function png_do_check_palette_indexes(),
+    which failed to recognize errors that might have existed in the first
+    column of a broken palette-encoded image. This was a benign regression
+    accidentally introduced in libpng-1.6.33. No pixel was harmed.
+    (Contributed by Adam Richter; reviewed by John Bowler)
+  Fixed, improved and modernized the contrib/pngminus programs, i.e.,
+    png2pnm.c and pnm2png.c
+  Removed old and peculiar portability hacks that were meant to silence
+    warnings issued by gcc version 7.1 alone.
+    (Contributed by John Bowler)
+  Fixed and modernized the CMake file, and raised the minimum required
+    CMake version from 3.1 to 3.6.
+    (Contributed by Clinton Ingram, Timothy Lyanguzov, Tyler Kropp, et al.)
+  Allowed the configure script to disable the building of auxiliary tools
+    and tests, thus catching up with the CMake file.
+    (Contributed by Carlo Bramini)
+  Fixed a build issue on Mac.
+    (Contributed by Zixu Wang)
+  Moved the Autoconf macro files to scripts/autoconf.
+  Moved the CMake files (except for the main CMakeLists.txt) to
+    scripts/cmake and moved the list of their contributing authors to
+    scripts/cmake/AUTHORS.md
+  Updated the CI configurations and scripts.
+  Relicensed the CI scripts to the MIT License.
+  Improved the test coverage.
+    (Contributed by John Bowler)
+
+Version 1.6.42 [January 29, 2024]
+  Fixed the implementation of the macro function png_check_sig().
+    This was an API regression, introduced in libpng-1.6.41.
+    (Reported by Matthieu Darbois)
+  Fixed and updated the libpng manual.
+
+Version 1.6.43 [February 23, 2024]
+  Fixed the row width check in png_check_IHDR().
+    This corrected a bug that was specific to the 16-bit platforms,
+    and removed a spurious compiler warning from the 64-bit builds.
+    (Reported by Jacek Caban; fixed by John Bowler)
+  Added eXIf chunk support to the push-mode reader in pngpread.c.
+    (Contributed by Chris Blume)
+  Added contrib/pngexif for the benefit of the users who would like
+    to inspect the content of eXIf chunks.
+  Added contrib/conftest/basic.dfa, a basic build-time configuration.
+    (Contributed by John Bowler)
+  Fixed a preprocessor condition in pngread.c that broke build-time
+    configurations like contrib/conftest/pngcp.dfa.
+    (Contributed by John Bowler)
+  Added CMake build support for LoongArch LSX.
+    (Contributed by GuXiWei)
+  Fixed a CMake build error that occurred under a peculiar state of the
+    dependency tree. This was a regression introduced in libpng-1.6.41.
+    (Contributed by Dan Rosser)
+  Marked the installed libpng headers as system headers in CMake.
+    (Contributed by Benjamin Buch)
+  Updated the build support for RISCOS.
+    (Contributed by Cameron Cawley)
+  Updated the makefiles to allow cross-platform builds to initialize
+    conventional make variables like AR and ARFLAGS.
+  Added various improvements to the CI scripts in areas like version
+    consistency verification and text linting.
+  Added version consistency verification to pngtest.c also.
+
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 https://lists.sourceforge.net/lists/listinfo/png-mng-implement

vendor/libpng/LICENSE

@@ -4,8 +4,8 @@ COPYRIGHT NOTICE, DISCLAIMER, and LICENSE
 PNG Reference Library License version 2
 ---------------------------------------
 
- * Copyright (c) 1995-2023 The PNG Reference Library Authors.
- * Copyright (c) 2018-2023 Cosmin Truta.
+ * Copyright (c) 1995-2024 The PNG Reference Library Authors.
+ * Copyright (c) 2018-2024 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.

vendor/libpng/README

@@ -1,4 +1,4 @@
-README for libpng version 1.6.40
+README for libpng version 1.6.43
 ================================
 
 See the note about version numbers near the top of `png.h`.
@@ -142,10 +142,11 @@ Files included in this distribution
     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
+    arm/          =>  Optimized code for ARM Neon
+    intel/        =>  Optimized code for INTEL SSE2
+    loongarch/    =>  Optimized code for LoongArch LSX
+    mips/         =>  Optimized code for MIPS MSA and MIPS MMI
+    powerpc/      =>  Optimized code for PowerPC VSX
     ci/           =>  Scripts for continuous integration
     contrib/      =>  External contributions
         arm-neon/     =>  Optimized code for the ARM-NEON platform
@@ -158,6 +159,7 @@ Files included in this distribution
         libtests/     =>  Test programs
         oss-fuzz/     =>  Files used by the OSS-Fuzz project for fuzz-testing
                           libpng
+        pngexif/      =>  Program to inspect the EXIF information in PNG files
         pngminim/     =>  Minimal decoder, encoder, and progressive decoder
                           programs demonstrating the use of pngusr.dfa
         pngminus/     =>  Simple pnm2png and png2pnm programs