Update bundled libpng to version 1.6.50 dated 2025-07-01

1 files changed, 15 insertions, 26 deletions

diff --git a/png/ANNOUNCE b/png/ANNOUNCE
index a2a7ac363..516e07808 100644
--- a/png/ANNOUNCE
+++ b/png/ANNOUNCE
@@ -1,5 +1,5 @@
-libpng 1.6.44 - September 12, 2024
-==================================
+libpng 1.6.50 - July 1, 2025
+============================
 
 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-1.6.44.tar.xz (LZMA-compressed, recommended)
- * libpng-1.6.44.tar.gz (deflate-compressed)
+ * libpng-1.6.50.tar.xz (LZMA-compressed, recommended)
+ * libpng-1.6.50.tar.gz (deflate-compressed)
 
 Source files with CRLF line endings (for Windows):
 
- * lpng1644.7z (LZMA-compressed, recommended)
- * lpng1644.zip (deflate-compressed)
+ * lpng1650.7z (LZMA-compressed, recommended)
+ * lpng1650.zip (deflate-compressed)
 
 Other information:
 
@@ -25,29 +25,18 @@ Other information:
  * TRADEMARK.md
 
 
-Changes from version 1.6.43 to version 1.6.44
+Changes from version 1.6.49 to version 1.6.50
 ---------------------------------------------
 
- * Hardened calculations in chroma handling to prevent overflows, and
-   relaxed a constraint in cHRM validation to accomodate the standard
-   ACES AP1 set of color primaries.
+ * Improved the detection of the RVV Extension on the RISC-V platform.
+   (Contributed by Filip Wasil)
+ * Replaced inline ASM with C intrinsics in the RVV code.
+   (Contributed by Filip Wasil)
+ * Fixed a decoder defect in which unknown chunks trailing IDAT, set
+   to go through the unknown chunk handler, incorrectly triggered
+   out-of-place IEND errors.
    (Contributed by John Bowler)
- * Removed the ASM implementation of ARM Neon optimizations and updated
-   the build accordingly. Only the remaining C implementation shall be
-   used from now on, thus ensuring the support of the PAC/BTI security
-   features on ARM64.
-   (Contributed by Ross Burton and John Bowler)
- * Fixed the pickup of the PNG_HARDWARE_OPTIMIZATIONS option in the
-   CMake build on FreeBSD/amd64. This is an important performance fix
-   on this platform.
- * Applied various fixes and improvements to the CMake build.
-   (Contributed by Eric Riff, Benjamin Buch and Erik Scholz)
- * Added fuzzing targets for the simplified read API.
-   (Contributed by Mikhail Khachayants)
- * Fixed a build error involving pngtest.c under a custom config.
-   This was a regression introduced in a code cleanup in libpng-1.6.43.
-   (Contributed by Ben Wagner)
- * Fixed and improved the config files for AppVeyor CI and Travis CI.
+ * Fixed the CMake file for cross-platform builds that require `libm`.
 
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net.