diff --git a/src/java.desktop/share/legal/libpng.md b/src/java.desktop/share/legal/libpng.md
index f420ccd94ed..cbffed81332 100644
--- a/src/java.desktop/share/legal/libpng.md
+++ b/src/java.desktop/share/legal/libpng.md
@@ -1,4 +1,4 @@
-## libpng v1.6.40
+## libpng v1.6.43
 
 ### libpng License
 <pre>
@@ -9,11 +9,11 @@ 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) 1998-2018 Glenn Randers-Pehrson
-Copyright (c) 1996-1997 Andreas Dilger
-Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
+Copyright (C) 1995-2024 The PNG Reference Library Authors.
+Copyright (C) 2018-2024 Cosmin Truta
+Copyright (C) 1998-2018 Glenn Randers-Pehrson
+Copyright (C) 1996-1997 Andreas Dilger
+Copyright (C) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
 
 The software is supplied "as is", without warranty of any kind,
 express or implied, including, without limitation, the warranties
@@ -157,7 +157,9 @@ 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
@@ -186,21 +188,28 @@ 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.
 ```
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/CHANGES b/src/java.desktop/share/native/libsplashscreen/libpng/CHANGES
index 2d8c585c0e7..441b57ecf1a 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/CHANGES
+++ b/src/java.desktop/share/native/libsplashscreen/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.
+
 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/src/java.desktop/share/native/libsplashscreen/libpng/LICENSE b/src/java.desktop/share/native/libsplashscreen/libpng/LICENSE
index 086d1c2fda6..25f298f0fcf 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/LICENSE
+++ b/src/java.desktop/share/native/libsplashscreen/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.
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/README b/src/java.desktop/share/native/libsplashscreen/libpng/README
index dedd2c1639e..a6ca3ae9f94 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/README
+++ b/src/java.desktop/share/native/libsplashscreen/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
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/UPDATING.txt b/src/java.desktop/share/native/libsplashscreen/libpng/UPDATING.txt
index 93c8f5bb703..88200db5d73 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/UPDATING.txt
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/UPDATING.txt
@@ -37,18 +37,21 @@ and instead just tweak the existing one.
 
 First cd into the libpng folder and run the following script.
 
+    shopt -s nullglob
     for f in *.c *.h;
-    do
-      # replace tabs with spaces
-      expand ${f} > ${f}.tmp;
-      mv ${f}.tmp $f;
-
-      # fix line endings to LF
-      sed -i -e 's/\r$//g' ${f};
-
-      # remove trailing spaces
-      sed -i -e 's/[ ]* $//g' ${f};
-    done
+         do
+            # replace tabs with spaces
+            expand ${f} > ${f}.tmp
+            mv ${f}.tmp $f
+
+            # fix line endings to LF
+            sed -e 's/\r$//g' ${f} > ${f}.tmp
+            mv ${f}.tmp $f
+
+            # remove trailing spaces
+            sed -e 's/[ ]* $//g' ${f} > ${f}.tmp
+            mv ${f}.tmp $f
+         done
 
 6) As with all native code, run it through the official build systems, in case
 the updated code trigger any fatal warnings with the official compilers.
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/png.c b/src/java.desktop/share/native/libsplashscreen/libpng/png.c
index 91a92e5f718..232dff876c7 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/png.c
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/png.c
@@ -29,7 +29,7 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * Copyright (c) 2018-2023 Cosmin Truta
+ * Copyright (c) 2018-2024 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.
@@ -42,27 +42,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_40 Your_png_h_is_not_version_1_6_40;
-
-#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
+typedef png_libpng_version_1_6_43 Your_png_h_is_not_version_1_6_43;
 
 /* 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
@@ -101,21 +81,21 @@ png_set_sig_bytes(png_structrp png_ptr, int num_bytes)
 int PNGAPI
 png_sig_cmp(png_const_bytep sig, size_t start, size_t num_to_check)
 {
-   png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+   static const png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
 
    if (num_to_check > 8)
       num_to_check = 8;
 
    else if (num_to_check < 1)
-      return (-1);
+      return -1;
 
    if (start > 7)
-      return (-1);
+      return -1;
 
    if (start + num_to_check > 8)
       num_to_check = 8 - start;
 
-   return ((int)(memcmp(&sig[start], &png_signature[start], num_to_check)));
+   return memcmp(&sig[start], &png_signature[start], num_to_check);
 }
 
 #endif /* READ */
@@ -475,7 +455,6 @@ png_info_init_3,(png_infopp ptr_ptr, size_t png_info_struct_size),
    memset(info_ptr, 0, (sizeof *info_ptr));
 }
 
-/* The following API is not called internally */
 void PNGAPI
 png_data_freer(png_const_structrp png_ptr, png_inforp info_ptr,
     int freer, png_uint_32 mask)
@@ -714,9 +693,9 @@ png_voidp PNGAPI
 png_get_io_ptr(png_const_structrp png_ptr)
 {
    if (png_ptr == NULL)
-      return (NULL);
+      return NULL;
 
-   return (png_ptr->io_ptr);
+   return png_ptr->io_ptr;
 }
 
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
@@ -780,7 +759,7 @@ png_convert_to_rfc1123_buffer(char out[29], png_const_timep ptime)
 
    {
       size_t pos = 0;
-      char number_buf[5]; /* enough for a four-digit year */
+      char number_buf[5] = {0, 0, 0, 0, 0}; /* enough for a four-digit year */
 
 #     define APPEND_STRING(string) pos = png_safecat(out, 29, pos, (string))
 #     define APPEND_NUMBER(format, value)\
@@ -843,8 +822,8 @@ png_get_copyright(png_const_structrp png_ptr)
    return PNG_STRING_COPYRIGHT
 #else
    return PNG_STRING_NEWLINE \
-      "libpng version 1.6.40" PNG_STRING_NEWLINE \
-      "Copyright (c) 2018-2023 Cosmin Truta" PNG_STRING_NEWLINE \
+      "libpng version 1.6.43" PNG_STRING_NEWLINE \
+      "Copyright (c) 2018-2024 Cosmin Truta" PNG_STRING_NEWLINE \
       "Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson" \
       PNG_STRING_NEWLINE \
       "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
@@ -1005,7 +984,7 @@ png_reset_zstream(png_structrp png_ptr)
       return Z_STREAM_ERROR;
 
    /* WARNING: this resets the window bits to the maximum! */
-   return (inflateReset(&png_ptr->zstream));
+   return inflateReset(&png_ptr->zstream);
 }
 #endif /* READ */
 
@@ -1014,7 +993,7 @@ png_uint_32 PNGAPI
 png_access_version_number(void)
 {
    /* Version of *.c files used when building libpng */
-   return((png_uint_32)PNG_LIBPNG_VER);
+   return (png_uint_32)PNG_LIBPNG_VER;
 }
 
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
@@ -1870,14 +1849,14 @@ png_icc_profile_error(png_const_structrp png_ptr, png_colorspacerp colorspace,
    }
 #  ifdef PNG_WARNINGS_SUPPORTED
    else
-      {
-         char number[PNG_NUMBER_BUFFER_SIZE]; /* +24 = 114 */
+   {
+      char number[PNG_NUMBER_BUFFER_SIZE]; /* +24 = 114 */
 
-         pos = png_safecat(message, (sizeof message), pos,
-             png_format_number(number, number+(sizeof number),
-             PNG_NUMBER_FORMAT_x, value));
-         pos = png_safecat(message, (sizeof message), pos, "h: "); /* +2 = 116 */
-      }
+      pos = png_safecat(message, (sizeof message), pos,
+          png_format_number(number, number+(sizeof number),
+          PNG_NUMBER_FORMAT_x, value));
+      pos = png_safecat(message, (sizeof message), pos, "h: "); /* +2 = 116 */
+   }
 #  endif
    /* The 'reason' is an arbitrary message, allow +79 maximum 195 */
    pos = png_safecat(message, (sizeof message), pos, reason);
@@ -2560,17 +2539,6 @@ png_colorspace_set_rgb_coefficients(png_structrp png_ptr)
 
 #endif /* COLORSPACE */
 
-#ifdef __GNUC__
-/* This exists solely to work round a warning from GNU C. */
-static int /* PRIVATE */
-png_gt(size_t a, size_t b)
-{
-   return a > b;
-}
-#else
-#   define png_gt(a,b) ((a) > (b))
-#endif
-
 void /* PRIVATE */
 png_check_IHDR(png_const_structrp png_ptr,
     png_uint_32 width, png_uint_32 height, int bit_depth,
@@ -2592,8 +2560,16 @@ png_check_IHDR(png_const_structrp png_ptr,
       error = 1;
    }
 
-   if (png_gt(((width + 7) & (~7U)),
-       ((PNG_SIZE_MAX
+   /* The bit mask on the first line below must be at least as big as a
+    * png_uint_32.  "~7U" is not adequate on 16-bit systems because it will
+    * be an unsigned 16-bit value.  Casting to (png_alloc_size_t) makes the
+    * type of the result at least as bit (in bits) as the RHS of the > operator
+    * which also avoids a common warning on 64-bit systems that the comparison
+    * of (png_uint_32) against the constant value on the RHS will always be
+    * false.
+    */
+   if (((width + 7) & ~(png_alloc_size_t)7) >
+       (((PNG_SIZE_MAX
            - 48        /* big_row_buf hack */
            - 1)        /* filter byte */
            / 8)        /* 8-byte RGBA pixels */
@@ -2919,14 +2895,6 @@ png_pow10(int power)
 /* Function to format a floating point value in ASCII with a given
  * 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 */
 png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, size_t size,
     double fp, unsigned int precision)
@@ -3248,10 +3216,6 @@ png_ascii_from_fp(png_const_structrp png_ptr, png_charp ascii, size_t size,
    /* Here on 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 */
 
 #  ifdef PNG_FIXED_POINT_SUPPORTED
@@ -3279,7 +3243,7 @@ png_ascii_from_fixed(png_const_structrp png_ptr, png_charp ascii,
       if (num <= 0x80000000) /* else overflowed */
       {
          unsigned int ndigits = 0, first = 16 /* flag value */;
-         char digits[10];
+         char digits[10] = {0};
 
          while (num)
          {
@@ -3364,15 +3328,6 @@ 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 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
 png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times,
     png_int_32 divisor)
@@ -3487,9 +3442,6 @@ png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times,
 
    return 0;
 }
-#if GCC_STRICT_OVERFLOW
-#pragma GCC diagnostic pop
-#endif /* GCC_STRICT_OVERFLOW */
 #endif /* READ_GAMMA || INCH_CONVERSIONS */
 
 #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED)
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/png.h b/src/java.desktop/share/native/libsplashscreen/libpng/png.h
index 578841c9580..9f61a773c1d 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/png.h
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/png.h
@@ -29,9 +29,9 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * libpng version 1.6.40
+ * libpng version 1.6.43
  *
- * Copyright (c) 2018-2023 Cosmin Truta
+ * Copyright (c) 2018-2024 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.
@@ -43,7 +43,7 @@
  *   libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
  *   libpng versions 0.97, January 1998, through 1.6.35, July 2018:
  *     Glenn Randers-Pehrson
- *   libpng versions 1.6.36, December 2018, through 1.6.40, June 2023:
+ *   libpng versions 1.6.36, December 2018, through 1.6.43, February 2024:
  *     Cosmin Truta
  *   See also "Contributing Authors", below.
  */
@@ -55,8 +55,8 @@
  * 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.
@@ -267,7 +267,7 @@
  *    ...
  *    1.5.30                  15    10530  15.so.15.30[.0]
  *    ...
- *    1.6.40                  16    10640  16.so.16.40[.0]
+ *    1.6.43                  16    10643  16.so.16.43[.0]
  *
  *    Henceforth the source version will match the shared-library major and
  *    minor numbers; the shared-library major version number will be used for
@@ -283,9 +283,6 @@
  *    to the info_ptr or png_ptr members through png.h, and the compiled
  *    application is loaded with a different version of the library.
  *
- *    DLLNUM will change each time there are forward or backward changes
- *    in binary compatibility (e.g., when a new feature is added).
- *
  * See libpng.txt or libpng.3 for more information.  The PNG specification
  * is available as a W3C Recommendation and as an ISO/IEC Standard; see
  * <https://www.w3.org/TR/2003/REC-PNG-20031110/>
@@ -306,19 +303,21 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.6.40"
-#define PNG_HEADER_VERSION_STRING " libpng version 1.6.40 - June 21, 2023\n"
+#define PNG_LIBPNG_VER_STRING "1.6.43"
+#define PNG_HEADER_VERSION_STRING " libpng version " PNG_LIBPNG_VER_STRING "\n"
 
-#define PNG_LIBPNG_VER_SONUM   16
-#define PNG_LIBPNG_VER_DLLNUM  16
+/* The versions of shared library builds should stay in sync, going forward */
+#define PNG_LIBPNG_VER_SHAREDLIB 16
+#define PNG_LIBPNG_VER_SONUM     PNG_LIBPNG_VER_SHAREDLIB /* [Deprecated] */
+#define PNG_LIBPNG_VER_DLLNUM    PNG_LIBPNG_VER_SHAREDLIB /* [Deprecated] */
 
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
 #define PNG_LIBPNG_VER_MINOR   6
-#define PNG_LIBPNG_VER_RELEASE 40
+#define PNG_LIBPNG_VER_RELEASE 43
 
 /* This should be zero for a public release, or non-zero for a
- * development version.  [Deprecated]
+ * development version.
  */
 #define PNG_LIBPNG_VER_BUILD  0
 
@@ -346,7 +345,7 @@
  * From version 1.0.1 it is:
  * XXYYZZ, where XX=major, YY=minor, ZZ=release
  */
-#define PNG_LIBPNG_VER 10640 /* 1.6.40 */
+#define PNG_LIBPNG_VER 10643 /* 1.6.43 */
 
 /* Library configuration: these options cannot be changed after
  * the library has been built.
@@ -456,7 +455,7 @@ extern "C" {
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef char* png_libpng_version_1_6_40;
+typedef char* png_libpng_version_1_6_43;
 
 /* Basic control structions.  Read libpng-manual.txt or libpng.3 for more info.
  *
@@ -877,7 +876,7 @@ PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), typedef);
 #define PNG_TRANSFORM_GRAY_TO_RGB   0x2000      /* read only */
 /* Added to libpng-1.5.4 */
 #define PNG_TRANSFORM_EXPAND_16     0x4000      /* read only */
-#if INT_MAX >= 0x8000 /* else this might break */
+#if ~0U > 0xffffU /* or else this might break on a 16-bit machine */
 #define PNG_TRANSFORM_SCALE_16      0x8000      /* read only */
 #endif
 
@@ -936,15 +935,15 @@ PNG_EXPORT(2, void, png_set_sig_bytes, (png_structrp png_ptr, int num_bytes));
 /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a
  * PNG file.  Returns zero if the supplied bytes match the 8-byte PNG
  * signature, and non-zero otherwise.  Having num_to_check == 0 or
- * start > 7 will always fail (ie return non-zero).
+ * start > 7 will always fail (i.e. return non-zero).
  */
 PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, size_t start,
     size_t num_to_check));
 
 /* Simple signature checking function.  This is the same as calling
- * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n).
+ * png_check_sig(sig, n) := (png_sig_cmp(sig, 0, n) == 0).
  */
-#define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n))
+#define png_check_sig(sig, n) (png_sig_cmp((sig), 0, (n)) == 0) /* DEPRECATED */
 
 /* Allocate and initialize png_ptr struct for reading, and any other memory. */
 PNG_EXPORTA(4, png_structp, png_create_read_struct,
@@ -1758,12 +1757,9 @@ PNG_EXPORT(97, void, png_free, (png_const_structrp png_ptr, png_voidp ptr));
 PNG_EXPORT(98, void, png_free_data, (png_const_structrp png_ptr,
     png_inforp info_ptr, png_uint_32 free_me, int num));
 
-/* Reassign responsibility for freeing existing data, whether allocated
+/* Reassign the responsibility for freeing existing data, whether allocated
  * by libpng or by the application; this works on the png_info structure passed
- * in, it does not change the state for other png_info structures.
- *
- * It is unlikely that this function works correctly as of 1.6.0 and using it
- * may result either in memory leaks or double free of allocated data.
+ * in, without changing the state for other png_info structures.
  */
 PNG_EXPORT(99, void, png_data_freer, (png_const_structrp png_ptr,
     png_inforp info_ptr, int freer, png_uint_32 mask));
@@ -3235,11 +3231,18 @@ PNG_EXPORT(245, int, png_image_write_to_memory, (png_imagep image, void *memory,
 #ifdef PNG_MIPS_MSA_API_SUPPORTED
 #  define PNG_MIPS_MSA   6 /* HARDWARE: MIPS Msa SIMD instructions supported */
 #endif
-#define PNG_IGNORE_ADLER32 8
+#ifdef PNG_DISABLE_ADLER32_CHECK_SUPPORTED
+#  define PNG_IGNORE_ADLER32 8 /* SOFTWARE: disable Adler32 check on IDAT */
+#endif
 #ifdef PNG_POWERPC_VSX_API_SUPPORTED
-#  define PNG_POWERPC_VSX   10 /* HARDWARE: PowerPC VSX SIMD instructions supported */
+#  define PNG_POWERPC_VSX   10 /* HARDWARE: PowerPC VSX SIMD instructions
+                                * supported */
 #endif
-#define PNG_OPTION_NEXT  12 /* Next option - numbers must be even */
+#ifdef PNG_MIPS_MMI_API_SUPPORTED
+#  define PNG_MIPS_MMI   12 /* HARDWARE: MIPS MMI SIMD instructions supported */
+#endif
+
+#define PNG_OPTION_NEXT  14 /* Next option - numbers must be even */
 
 /* Return values: NOTE: there are four values and 'off' is *not* zero */
 #define PNG_OPTION_UNSET   0 /* Unset - defaults to off */
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/pngconf.h b/src/java.desktop/share/native/libsplashscreen/libpng/pngconf.h
index 41cbc91d398..b3b441b1122 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/pngconf.h
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/pngconf.h
@@ -29,9 +29,9 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * libpng version 1.6.40
+ * libpng version 1.6.43
  *
- * Copyright (c) 2018-2022 Cosmin Truta
+ * Copyright (c) 2018-2024 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.
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/pngerror.c b/src/java.desktop/share/native/libsplashscreen/libpng/pngerror.c
index 623735f06f1..ea8dd172197 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/pngerror.c
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/pngerror.c
@@ -29,7 +29,7 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * Copyright (c) 2018 Cosmin Truta
+ * Copyright (c) 2018-2024 Cosmin Truta
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * Copyright (c) 1996-1997 Andreas Dilger
  * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
@@ -283,7 +283,7 @@ void
 png_warning_parameter_unsigned(png_warning_parameters p, int number, int format,
     png_alloc_size_t value)
 {
-   char buffer[PNG_NUMBER_BUFFER_SIZE];
+   char buffer[PNG_NUMBER_BUFFER_SIZE] = {0};
    png_warning_parameter(p, number, PNG_FORMAT_NUMBER(buffer, format, value));
 }
 
@@ -293,7 +293,7 @@ png_warning_parameter_signed(png_warning_parameters p, int number, int format,
 {
    png_alloc_size_t u;
    png_charp str;
-   char buffer[PNG_NUMBER_BUFFER_SIZE];
+   char buffer[PNG_NUMBER_BUFFER_SIZE] = {0};
 
    /* Avoid overflow by doing the negate in a png_alloc_size_t: */
    u = (png_alloc_size_t)value;
@@ -886,7 +886,7 @@ png_get_error_ptr(png_const_structrp png_ptr)
    if (png_ptr == NULL)
       return NULL;
 
-   return ((png_voidp)png_ptr->error_ptr);
+   return (png_voidp)png_ptr->error_ptr;
 }
 
 
@@ -961,31 +961,25 @@ png_safe_warning(png_structp png_nonconst_ptr, png_const_charp warning_message)
 #endif
 
 int /* PRIVATE */
-png_safe_execute(png_imagep image_in, int (*function)(png_voidp), png_voidp arg)
+png_safe_execute(png_imagep image, int (*function)(png_voidp), png_voidp arg)
 {
-   volatile png_imagep image = image_in;
-   volatile int result;
-   volatile png_voidp saved_error_buf;
+   png_voidp saved_error_buf = image->opaque->error_buf;
    jmp_buf safe_jmpbuf;
+   int result;
 
-   /* Safely execute function(arg) with png_error returning to this function. */
-   saved_error_buf = image->opaque->error_buf;
-   result = setjmp(safe_jmpbuf) == 0;
-
-   if (result != 0)
+   /* Safely execute function(arg), with png_error returning back here. */
+   if (setjmp(safe_jmpbuf) == 0)
    {
-
       image->opaque->error_buf = safe_jmpbuf;
       result = function(arg);
+      image->opaque->error_buf = saved_error_buf;
+      return result;
    }
 
+   /* On png_error, return via longjmp, pop the jmpbuf, and free the image. */
    image->opaque->error_buf = saved_error_buf;
-
-   /* And do the cleanup prior to any failure return. */
-   if (result == 0)
-      png_image_free(image);
-
-   return result;
+   png_image_free(image);
+   return 0;
 }
 #endif /* SIMPLIFIED READ || SIMPLIFIED_WRITE */
 #endif /* READ || WRITE */
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/pngget.c b/src/java.desktop/share/native/libsplashscreen/libpng/pngget.c
index 6e510b27327..41e0a5abc3a 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/pngget.c
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/pngget.c
@@ -29,7 +29,7 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * Copyright (c) 2018-2023 Cosmin Truta
+ * Copyright (c) 2018-2024 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.
@@ -56,22 +56,22 @@ png_get_valid(png_const_structrp png_ptr, png_const_inforp info_ptr,
        * valid tRNS chunk in this case.
        */
       if (flag == PNG_INFO_tRNS && png_ptr->num_trans == 0)
-         return(0);
+         return 0;
 #endif
 
-      return(info_ptr->valid & flag);
+      return info_ptr->valid & flag;
    }
 
-   return(0);
+   return 0;
 }
 
 size_t PNGAPI
 png_get_rowbytes(png_const_structrp png_ptr, png_const_inforp info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
-      return(info_ptr->rowbytes);
+      return info_ptr->rowbytes;
 
-   return(0);
+   return 0;
 }
 
 #ifdef PNG_INFO_IMAGE_SUPPORTED
@@ -79,9 +79,9 @@ png_bytepp PNGAPI
 png_get_rows(png_const_structrp png_ptr, png_const_inforp info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
-      return(info_ptr->row_pointers);
+      return info_ptr->row_pointers;
 
-   return(0);
+   return 0;
 }
 #endif
 
@@ -93,7 +93,7 @@ png_get_image_width(png_const_structrp png_ptr, png_const_inforp info_ptr)
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->width;
 
-   return (0);
+   return 0;
 }
 
 png_uint_32 PNGAPI
@@ -102,7 +102,7 @@ png_get_image_height(png_const_structrp png_ptr, png_const_inforp info_ptr)
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->height;
 
-   return (0);
+   return 0;
 }
 
 png_byte PNGAPI
@@ -111,7 +111,7 @@ png_get_bit_depth(png_const_structrp png_ptr, png_const_inforp info_ptr)
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->bit_depth;
 
-   return (0);
+   return 0;
 }
 
 png_byte PNGAPI
@@ -120,7 +120,7 @@ png_get_color_type(png_const_structrp png_ptr, png_const_inforp info_ptr)
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->color_type;
 
-   return (0);
+   return 0;
 }
 
 png_byte PNGAPI
@@ -129,7 +129,7 @@ png_get_filter_type(png_const_structrp png_ptr, png_const_inforp info_ptr)
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->filter_type;
 
-   return (0);
+   return 0;
 }
 
 png_byte PNGAPI
@@ -138,7 +138,7 @@ png_get_interlace_type(png_const_structrp png_ptr, png_const_inforp info_ptr)
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->interlace_type;
 
-   return (0);
+   return 0;
 }
 
 png_byte PNGAPI
@@ -147,7 +147,7 @@ png_get_compression_type(png_const_structrp png_ptr, png_const_inforp info_ptr)
    if (png_ptr != NULL && info_ptr != NULL)
       return info_ptr->compression_type;
 
-   return (0);
+   return 0;
 }
 
 png_uint_32 PNGAPI
@@ -155,21 +155,20 @@ png_get_x_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp
    info_ptr)
 {
 #ifdef PNG_pHYs_SUPPORTED
+   png_debug(1, "in png_get_x_pixels_per_meter");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_pHYs) != 0)
-      {
-         png_debug1(1, "in %s retrieval function",
-             "png_get_x_pixels_per_meter");
-
-         if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
-            return (info_ptr->x_pixels_per_unit);
-      }
+   {
+      if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
+         return info_ptr->x_pixels_per_unit;
+   }
 #else
    PNG_UNUSED(png_ptr)
    PNG_UNUSED(info_ptr)
 #endif
 
-   return (0);
+   return 0;
 }
 
 png_uint_32 PNGAPI
@@ -177,42 +176,41 @@ png_get_y_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp
     info_ptr)
 {
 #ifdef PNG_pHYs_SUPPORTED
+   png_debug(1, "in png_get_y_pixels_per_meter");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_pHYs) != 0)
    {
-      png_debug1(1, "in %s retrieval function",
-          "png_get_y_pixels_per_meter");
-
       if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
-         return (info_ptr->y_pixels_per_unit);
+         return info_ptr->y_pixels_per_unit;
    }
 #else
    PNG_UNUSED(png_ptr)
    PNG_UNUSED(info_ptr)
 #endif
 
-   return (0);
+   return 0;
 }
 
 png_uint_32 PNGAPI
 png_get_pixels_per_meter(png_const_structrp png_ptr, png_const_inforp info_ptr)
 {
 #ifdef PNG_pHYs_SUPPORTED
+   png_debug(1, "in png_get_pixels_per_meter");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_pHYs) != 0)
    {
-      png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter");
-
       if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER &&
           info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit)
-         return (info_ptr->x_pixels_per_unit);
+         return info_ptr->x_pixels_per_unit;
    }
 #else
    PNG_UNUSED(png_ptr)
    PNG_UNUSED(info_ptr)
 #endif
 
-   return (0);
+   return 0;
 }
 
 #ifdef PNG_FLOATING_POINT_SUPPORTED
@@ -221,21 +219,21 @@ png_get_pixel_aspect_ratio(png_const_structrp png_ptr, png_const_inforp
    info_ptr)
 {
 #ifdef PNG_READ_pHYs_SUPPORTED
+   png_debug(1, "in png_get_pixel_aspect_ratio");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_pHYs) != 0)
    {
-      png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio");
-
       if (info_ptr->x_pixels_per_unit != 0)
-         return ((float)((float)info_ptr->y_pixels_per_unit
-             /(float)info_ptr->x_pixels_per_unit));
+         return (float)info_ptr->y_pixels_per_unit
+              / (float)info_ptr->x_pixels_per_unit;
    }
 #else
    PNG_UNUSED(png_ptr)
    PNG_UNUSED(info_ptr)
 #endif
 
-   return ((float)0.0);
+   return (float)0.0;
 }
 #endif
 
@@ -245,6 +243,8 @@ png_get_pixel_aspect_ratio_fixed(png_const_structrp png_ptr,
     png_const_inforp info_ptr)
 {
 #ifdef PNG_READ_pHYs_SUPPORTED
+   png_debug(1, "in png_get_pixel_aspect_ratio_fixed");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_pHYs) != 0 &&
        info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0 &&
@@ -253,8 +253,6 @@ png_get_pixel_aspect_ratio_fixed(png_const_structrp png_ptr,
    {
       png_fixed_point res;
 
-      png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio_fixed");
-
       /* The following casts work because a PNG 4 byte integer only has a valid
        * range of 0..2^31-1; otherwise the cast might overflow.
        */
@@ -275,80 +273,80 @@ png_int_32 PNGAPI
 png_get_x_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr)
 {
 #ifdef PNG_oFFs_SUPPORTED
+   png_debug(1, "in png_get_x_offset_microns");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_oFFs) != 0)
    {
-      png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns");
-
       if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
-         return (info_ptr->x_offset);
+         return info_ptr->x_offset;
    }
 #else
    PNG_UNUSED(png_ptr)
    PNG_UNUSED(info_ptr)
 #endif
 
-   return (0);
+   return 0;
 }
 
 png_int_32 PNGAPI
 png_get_y_offset_microns(png_const_structrp png_ptr, png_const_inforp info_ptr)
 {
 #ifdef PNG_oFFs_SUPPORTED
+   png_debug(1, "in png_get_y_offset_microns");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_oFFs) != 0)
    {
-      png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns");
-
       if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
-         return (info_ptr->y_offset);
+         return info_ptr->y_offset;
    }
 #else
    PNG_UNUSED(png_ptr)
    PNG_UNUSED(info_ptr)
 #endif
 
-   return (0);
+   return 0;
 }
 
 png_int_32 PNGAPI
 png_get_x_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr)
 {
 #ifdef PNG_oFFs_SUPPORTED
+   png_debug(1, "in png_get_x_offset_pixels");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_oFFs) != 0)
    {
-      png_debug1(1, "in %s retrieval function", "png_get_x_offset_pixels");
-
       if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
-         return (info_ptr->x_offset);
+         return info_ptr->x_offset;
    }
 #else
    PNG_UNUSED(png_ptr)
    PNG_UNUSED(info_ptr)
 #endif
 
-   return (0);
+   return 0;
 }
 
 png_int_32 PNGAPI
 png_get_y_offset_pixels(png_const_structrp png_ptr, png_const_inforp info_ptr)
 {
 #ifdef PNG_oFFs_SUPPORTED
+   png_debug(1, "in png_get_y_offset_pixels");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_oFFs) != 0)
    {
-      png_debug1(1, "in %s retrieval function", "png_get_y_offset_pixels");
-
       if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
-         return (info_ptr->y_offset);
+         return info_ptr->y_offset;
    }
 #else
    PNG_UNUSED(png_ptr)
    PNG_UNUSED(info_ptr)
 #endif
 
-   return (0);
+   return 0;
 }
 
 #ifdef PNG_INCH_CONVERSIONS_SUPPORTED
@@ -462,11 +460,11 @@ png_get_pHYs_dpi(png_const_structrp png_ptr, png_const_inforp info_ptr,
 {
    png_uint_32 retval = 0;
 
+   png_debug1(1, "in %s retrieval function", "pHYs");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_pHYs) != 0)
    {
-      png_debug1(1, "in %s retrieval function", "pHYs");
-
       if (res_x != NULL)
       {
          *res_x = info_ptr->x_pixels_per_unit;
@@ -492,7 +490,7 @@ png_get_pHYs_dpi(png_const_structrp png_ptr, png_const_inforp info_ptr,
       }
    }
 
-   return (retval);
+   return retval;
 }
 #endif /* pHYs */
 #endif /* INCH_CONVERSIONS */
@@ -506,9 +504,9 @@ png_byte PNGAPI
 png_get_channels(png_const_structrp png_ptr, png_const_inforp info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
-      return(info_ptr->channels);
+      return info_ptr->channels;
 
-   return (0);
+   return 0;
 }
 
 #ifdef PNG_READ_SUPPORTED
@@ -516,9 +514,9 @@ png_const_bytep PNGAPI
 png_get_signature(png_const_structrp png_ptr, png_const_inforp info_ptr)
 {
    if (png_ptr != NULL && info_ptr != NULL)
-      return(info_ptr->signature);
+      return info_ptr->signature;
 
-   return (NULL);
+   return NULL;
 }
 #endif
 
@@ -527,17 +525,17 @@ png_uint_32 PNGAPI
 png_get_bKGD(png_const_structrp png_ptr, png_inforp info_ptr,
     png_color_16p *background)
 {
+   png_debug1(1, "in %s retrieval function", "bKGD");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_bKGD) != 0 &&
        background != NULL)
    {
-      png_debug1(1, "in %s retrieval function", "bKGD");
-
       *background = &(info_ptr->background);
-      return (PNG_INFO_bKGD);
+      return PNG_INFO_bKGD;
    }
 
-   return (0);
+   return 0;
 }
 #endif
 
@@ -552,6 +550,8 @@ png_get_cHRM(png_const_structrp png_ptr, png_const_inforp info_ptr,
     double *white_x, double *white_y, double *red_x, double *red_y,
     double *green_x, double *green_y, double *blue_x, double *blue_y)
 {
+   png_debug1(1, "in %s retrieval function", "cHRM");
+
    /* Quiet API change: this code used to only return the end points if a cHRM
     * chunk was present, but the end points can also come from iCCP or sRGB
     * chunks, so in 1.6.0 the png_get_ APIs return the end points regardless and
@@ -561,8 +561,6 @@ png_get_cHRM(png_const_structrp png_ptr, png_const_inforp info_ptr,
    if (png_ptr != NULL && info_ptr != NULL &&
       (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0)
    {
-      png_debug1(1, "in %s retrieval function", "cHRM");
-
       if (white_x != NULL)
          *white_x = png_float(png_ptr,
              info_ptr->colorspace.end_points_xy.whitex, "cHRM white X");
@@ -587,10 +585,10 @@ png_get_cHRM(png_const_structrp png_ptr, png_const_inforp info_ptr,
       if (blue_y != NULL)
          *blue_y = png_float(png_ptr, info_ptr->colorspace.end_points_xy.bluey,
              "cHRM blue Y");
-      return (PNG_INFO_cHRM);
+      return PNG_INFO_cHRM;
    }
 
-   return (0);
+   return 0;
 }
 
 png_uint_32 PNGAPI
@@ -599,11 +597,11 @@ png_get_cHRM_XYZ(png_const_structrp png_ptr, png_const_inforp info_ptr,
     double *green_Y, double *green_Z, double *blue_X, double *blue_Y,
     double *blue_Z)
 {
+   png_debug1(1, "in %s retrieval function", "cHRM_XYZ(float)");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0)
    {
-      png_debug1(1, "in %s retrieval function", "cHRM_XYZ(float)");
-
       if (red_X != NULL)
          *red_X = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.red_X,
              "cHRM red X");
@@ -631,10 +629,10 @@ png_get_cHRM_XYZ(png_const_structrp png_ptr, png_const_inforp info_ptr,
       if (blue_Z != NULL)
          *blue_Z = png_float(png_ptr,
              info_ptr->colorspace.end_points_XYZ.blue_Z, "cHRM blue Z");
-      return (PNG_INFO_cHRM);
+      return PNG_INFO_cHRM;
    }
 
-   return (0);
+   return 0;
 }
 #  endif
 
@@ -647,11 +645,11 @@ png_get_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
     png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y,
     png_fixed_point *int_blue_Z)
 {
+   png_debug1(1, "in %s retrieval function", "cHRM_XYZ");
+
    if (png_ptr != NULL && info_ptr != NULL &&
       (info_ptr->colorspace.flags & PNG_COLORSPACE_HAVE_ENDPOINTS) != 0)
    {
-      png_debug1(1, "in %s retrieval function", "cHRM_XYZ");
-
       if (int_red_X != NULL)
          *int_red_X = info_ptr->colorspace.end_points_XYZ.red_X;
       if (int_red_Y != NULL)
@@ -670,10 +668,10 @@ png_get_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
          *int_blue_Y = info_ptr->colorspace.end_points_XYZ.blue_Y;
       if (int_blue_Z != NULL)
          *int_blue_Z = info_ptr->colorspace.end_points_XYZ.blue_Z;
-      return (PNG_INFO_cHRM);
+      return PNG_INFO_cHRM;
    }
 
-   return (0);
+   return 0;
 }
 
 png_uint_32 PNGAPI
@@ -703,10 +701,10 @@ png_get_cHRM_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
          *blue_x = info_ptr->colorspace.end_points_xy.bluex;
       if (blue_y != NULL)
          *blue_y = info_ptr->colorspace.end_points_xy.bluey;
-      return (PNG_INFO_cHRM);
+      return PNG_INFO_cHRM;
    }
 
-   return (0);
+   return 0;
 }
 #  endif
 #endif
@@ -724,10 +722,10 @@ png_get_gAMA_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
        file_gamma != NULL)
    {
       *file_gamma = info_ptr->colorspace.gamma;
-      return (PNG_INFO_gAMA);
+      return PNG_INFO_gAMA;
    }
 
-   return (0);
+   return 0;
 }
 #  endif
 
@@ -744,10 +742,10 @@ png_get_gAMA(png_const_structrp png_ptr, png_const_inforp info_ptr,
    {
       *file_gamma = png_float(png_ptr, info_ptr->colorspace.gamma,
           "png_get_gAMA");
-      return (PNG_INFO_gAMA);
+      return PNG_INFO_gAMA;
    }
 
-   return (0);
+   return 0;
 }
 #  endif
 #endif
@@ -763,10 +761,10 @@ png_get_sRGB(png_const_structrp png_ptr, png_const_inforp info_ptr,
       (info_ptr->valid & PNG_INFO_sRGB) != 0 && file_srgb_intent != NULL)
    {
       *file_srgb_intent = info_ptr->colorspace.rendering_intent;
-      return (PNG_INFO_sRGB);
+      return PNG_INFO_sRGB;
    }
 
-   return (0);
+   return 0;
 }
 #endif
 
@@ -790,10 +788,10 @@ png_get_iCCP(png_const_structrp png_ptr, png_inforp info_ptr,
        */
       if (compression_type != NULL)
          *compression_type = PNG_COMPRESSION_TYPE_BASE;
-      return (PNG_INFO_iCCP);
+      return PNG_INFO_iCCP;
    }
 
-   return (0);
+   return 0;
 
 }
 #endif
@@ -803,13 +801,15 @@ int PNGAPI
 png_get_sPLT(png_const_structrp png_ptr, png_inforp info_ptr,
     png_sPLT_tpp spalettes)
 {
+   png_debug1(1, "in %s retrieval function", "sPLT");
+
    if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
    {
       *spalettes = info_ptr->splt_palettes;
       return info_ptr->splt_palettes_num;
    }
 
-   return (0);
+   return 0;
 }
 #endif
 
@@ -835,10 +835,10 @@ png_get_eXIf_1(png_const_structrp png_ptr, png_const_inforp info_ptr,
    {
       *num_exif = info_ptr->num_exif;
       *exif = info_ptr->exif;
-      return (PNG_INFO_eXIf);
+      return PNG_INFO_eXIf;
    }
 
-   return (0);
+   return 0;
 }
 #endif
 
@@ -853,10 +853,10 @@ png_get_hIST(png_const_structrp png_ptr, png_inforp info_ptr,
        (info_ptr->valid & PNG_INFO_hIST) != 0 && hist != NULL)
    {
       *hist = info_ptr->hist;
-      return (PNG_INFO_hIST);
+      return PNG_INFO_hIST;
    }
 
-   return (0);
+   return 0;
 }
 #endif
 
@@ -869,7 +869,7 @@ png_get_IHDR(png_const_structrp png_ptr, png_const_inforp info_ptr,
    png_debug1(1, "in %s retrieval function", "IHDR");
 
    if (png_ptr == NULL || info_ptr == NULL)
-      return (0);
+      return 0;
 
    if (width != NULL)
        *width = info_ptr->width;
@@ -901,7 +901,7 @@ png_get_IHDR(png_const_structrp png_ptr, png_const_inforp info_ptr,
        info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
        info_ptr->compression_type, info_ptr->filter_type);
 
-   return (1);
+   return 1;
 }
 
 #ifdef PNG_oFFs_SUPPORTED
@@ -918,10 +918,10 @@ png_get_oFFs(png_const_structrp png_ptr, png_const_inforp info_ptr,
       *offset_x = info_ptr->x_offset;
       *offset_y = info_ptr->y_offset;
       *unit_type = (int)info_ptr->offset_unit_type;
-      return (PNG_INFO_oFFs);
+      return PNG_INFO_oFFs;
    }
 
-   return (0);
+   return 0;
 }
 #endif
 
@@ -945,10 +945,10 @@ png_get_pCAL(png_const_structrp png_ptr, png_inforp info_ptr,
       *nparams = (int)info_ptr->pcal_nparams;
       *units = info_ptr->pcal_units;
       *params = info_ptr->pcal_params;
-      return (PNG_INFO_pCAL);
+      return PNG_INFO_pCAL;
    }
 
-   return (0);
+   return 0;
 }
 #endif
 
@@ -960,6 +960,8 @@ png_uint_32 PNGAPI
 png_get_sCAL_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
     int *unit, png_fixed_point *width, png_fixed_point *height)
 {
+   png_debug1(1, "in %s retrieval function", "sCAL");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_sCAL) != 0)
    {
@@ -971,10 +973,10 @@ png_get_sCAL_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
       *width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width");
       *height = png_fixed(png_ptr, atof(info_ptr->scal_s_height),
           "sCAL height");
-      return (PNG_INFO_sCAL);
+      return PNG_INFO_sCAL;
    }
 
-   return(0);
+   return 0;
 }
 #    endif /* FLOATING_ARITHMETIC */
 #  endif /* FIXED_POINT */
@@ -983,32 +985,36 @@ png_uint_32 PNGAPI
 png_get_sCAL(png_const_structrp png_ptr, png_const_inforp info_ptr,
     int *unit, double *width, double *height)
 {
+   png_debug1(1, "in %s retrieval function", "sCAL(float)");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_sCAL) != 0)
    {
       *unit = info_ptr->scal_unit;
       *width = atof(info_ptr->scal_s_width);
       *height = atof(info_ptr->scal_s_height);
-      return (PNG_INFO_sCAL);
+      return PNG_INFO_sCAL;
    }
 
-   return(0);
+   return 0;
 }
 #  endif /* FLOATING POINT */
 png_uint_32 PNGAPI
 png_get_sCAL_s(png_const_structrp png_ptr, png_const_inforp info_ptr,
     int *unit, png_charpp width, png_charpp height)
 {
+   png_debug1(1, "in %s retrieval function", "sCAL(str)");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_sCAL) != 0)
    {
       *unit = info_ptr->scal_unit;
       *width = info_ptr->scal_s_width;
       *height = info_ptr->scal_s_height;
-      return (PNG_INFO_sCAL);
+      return PNG_INFO_sCAL;
    }
 
-   return(0);
+   return 0;
 }
 #endif /* sCAL */
 
@@ -1043,7 +1049,7 @@ png_get_pHYs(png_const_structrp png_ptr, png_const_inforp info_ptr,
       }
    }
 
-   return (retval);
+   return retval;
 }
 #endif /* pHYs */
 
@@ -1059,10 +1065,10 @@ png_get_PLTE(png_const_structrp png_ptr, png_inforp info_ptr,
       *palette = info_ptr->palette;
       *num_palette = info_ptr->num_palette;
       png_debug1(3, "num_palette = %d", *num_palette);
-      return (PNG_INFO_PLTE);
+      return PNG_INFO_PLTE;
    }
 
-   return (0);
+   return 0;
 }
 
 #ifdef PNG_sBIT_SUPPORTED
@@ -1076,10 +1082,10 @@ png_get_sBIT(png_const_structrp png_ptr, png_inforp info_ptr,
        (info_ptr->valid & PNG_INFO_sBIT) != 0 && sig_bit != NULL)
    {
       *sig_bit = &(info_ptr->sig_bit);
-      return (PNG_INFO_sBIT);
+      return PNG_INFO_sBIT;
    }
 
-   return (0);
+   return 0;
 }
 #endif
 
@@ -1090,7 +1096,7 @@ png_get_text(png_const_structrp png_ptr, png_inforp info_ptr,
 {
    if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
    {
-      png_debug1(1, "in 0x%lx retrieval function",
+      png_debug1(1, "in text retrieval function, chunk typeid = 0x%lx",
          (unsigned long)png_ptr->chunk_name);
 
       if (text_ptr != NULL)
@@ -1105,7 +1111,7 @@ png_get_text(png_const_structrp png_ptr, png_inforp info_ptr,
    if (num_text != NULL)
       *num_text = 0;
 
-   return(0);
+   return 0;
 }
 #endif
 
@@ -1120,10 +1126,10 @@ png_get_tIME(png_const_structrp png_ptr, png_inforp info_ptr,
        (info_ptr->valid & PNG_INFO_tIME) != 0 && mod_time != NULL)
    {
       *mod_time = &(info_ptr->mod_time);
-      return (PNG_INFO_tIME);
+      return PNG_INFO_tIME;
    }
 
-   return (0);
+   return 0;
 }
 #endif
 
@@ -1133,11 +1139,12 @@ png_get_tRNS(png_const_structrp png_ptr, png_inforp info_ptr,
     png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)
 {
    png_uint_32 retval = 0;
+
+   png_debug1(1, "in %s retrieval function", "tRNS");
+
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_tRNS) != 0)
    {
-      png_debug1(1, "in %s retrieval function", "tRNS");
-
       if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
       {
          if (trans_alpha != NULL)
@@ -1169,7 +1176,7 @@ png_get_tRNS(png_const_structrp png_ptr, png_inforp info_ptr,
       }
    }
 
-   return (retval);
+   return retval;
 }
 #endif
 
@@ -1184,7 +1191,7 @@ png_get_unknown_chunks(png_const_structrp png_ptr, png_inforp info_ptr,
       return info_ptr->unknown_chunks_num;
    }
 
-   return (0);
+   return 0;
 }
 #endif
 
@@ -1280,7 +1287,7 @@ png_get_palette_max(png_const_structp png_ptr, png_const_infop info_ptr)
    if (png_ptr != NULL && info_ptr != NULL)
       return png_ptr->num_palette_max;
 
-   return (-1);
+   return -1;
 }
 #  endif
 #endif
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/pnglibconf.h b/src/java.desktop/share/native/libsplashscreen/libpng/pnglibconf.h
index e98d49cf0cc..e238ccdb9a4 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/pnglibconf.h
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/pnglibconf.h
@@ -31,7 +31,7 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  */
-/* libpng version 1.6.40 */
+/* libpng version 1.6.43 */
 
 /* Copyright (c) 2018-2023 Cosmin Truta */
 /* Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson */
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/pngpread.c b/src/java.desktop/share/native/libsplashscreen/libpng/pngpread.c
index a98b2013256..816631cae18 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/pngpread.c
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/pngpread.c
@@ -29,7 +29,7 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * Copyright (c) 2018 Cosmin Truta
+ * Copyright (c) 2018-2024 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.
@@ -173,10 +173,10 @@ png_push_read_sig(png_structrp png_ptr, png_inforp info_ptr)
        num_to_check);
    png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes + num_to_check);
 
-   if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check))
+   if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check) != 0)
    {
       if (num_checked < 4 &&
-          png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
+          png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4) != 0)
          png_error(png_ptr, "Not a PNG file");
 
       else
@@ -322,6 +322,14 @@ png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr)
       png_handle_cHRM(png_ptr, info_ptr, png_ptr->push_length);
    }
 
+#endif
+#ifdef PNG_READ_eXIf_SUPPORTED
+   else if (png_ptr->chunk_name == png_eXIf)
+   {
+      PNG_PUSH_SAVE_BUFFER_IF_FULL
+      png_handle_eXIf(png_ptr, info_ptr, png_ptr->push_length);
+   }
+
 #endif
 #ifdef PNG_READ_sRGB_SUPPORTED
    else if (chunk_name == png_sRGB)
@@ -1117,7 +1125,7 @@ png_voidp PNGAPI
 png_get_progressive_ptr(png_const_structrp png_ptr)
 {
    if (png_ptr == NULL)
-      return (NULL);
+      return NULL;
 
    return png_ptr->io_ptr;
 }
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/pngpriv.h b/src/java.desktop/share/native/libsplashscreen/libpng/pngpriv.h
index 914d0b97b1d..18424542b00 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/pngpriv.h
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/pngpriv.h
@@ -29,7 +29,7 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * Copyright (c) 2018-2023 Cosmin Truta
+ * Copyright (c) 2018-2024 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.
@@ -64,7 +64,7 @@
  * still required (as of 2011-05-02.)
  */
 #ifndef _POSIX_SOURCE
-# define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */
+#  define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */
 #endif
 
 #ifndef PNG_VERSION_INFO_ONLY
@@ -218,13 +218,27 @@
 #endif /* PNG_ARM_NEON_OPT > 0 */
 
 #ifndef PNG_MIPS_MSA_OPT
-#  if defined(__mips_msa) && (__mips_isa_rev >= 5) && defined(PNG_ALIGNED_MEMORY_SUPPORTED)
+#  if defined(__mips_msa) && (__mips_isa_rev >= 5) && \
+   defined(PNG_ALIGNED_MEMORY_SUPPORTED)
 #     define PNG_MIPS_MSA_OPT 2
 #  else
 #     define PNG_MIPS_MSA_OPT 0
 #  endif
 #endif
 
+#ifndef PNG_MIPS_MMI_OPT
+#  ifdef PNG_MIPS_MMI
+#    if defined(__mips_loongson_mmi) && (_MIPS_SIM == _ABI64) && \
+     defined(PNG_ALIGNED_MEMORY_SUPPORTED)
+#       define PNG_MIPS_MMI_OPT 1
+#    else
+#       define PNG_MIPS_MMI_OPT 0
+#    endif
+#  else
+#    define PNG_MIPS_MMI_OPT 0
+#  endif
+#endif
+
 #ifndef PNG_POWERPC_VSX_OPT
 #  if defined(__PPC64__) && defined(__ALTIVEC__) && defined(__VSX__)
 #     define PNG_POWERPC_VSX_OPT 2
@@ -233,13 +247,21 @@
 #  endif
 #endif
 
+#ifndef PNG_LOONGARCH_LSX_OPT
+#  if defined(__loongarch_sx)
+#     define PNG_LOONGARCH_LSX_OPT 1
+#  else
+#     define PNG_LOONGARCH_LSX_OPT 0
+#  endif
+#endif
+
 #ifndef PNG_INTEL_SSE_OPT
 #   ifdef PNG_INTEL_SSE
       /* Only check for SSE if the build configuration has been modified to
        * enable SSE optimizations.  This means that these optimizations will
        * be off by default.  See contrib/intel for more details.
        */
-#     if defined(__SSE4_1__) || defined(__AVX__) || defined(__SSSE3__) || \
+#      if defined(__SSE4_1__) || defined(__AVX__) || defined(__SSSE3__) || \
        defined(__SSE2__) || defined(_M_X64) || defined(_M_AMD64) || \
        (defined(_M_IX86_FP) && _M_IX86_FP >= 2)
 #         define PNG_INTEL_SSE_OPT 1
@@ -276,7 +298,6 @@
 #endif
 
 #if PNG_MIPS_MSA_OPT > 0
-#  define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_msa
 #  ifndef PNG_MIPS_MSA_IMPLEMENTATION
 #     if defined(__mips_msa)
 #        if defined(__clang__)
@@ -292,11 +313,28 @@
 
 #  ifndef PNG_MIPS_MSA_IMPLEMENTATION
 #     define PNG_MIPS_MSA_IMPLEMENTATION 1
+#     define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_mips
 #  endif
 #else
 #  define PNG_MIPS_MSA_IMPLEMENTATION 0
 #endif /* PNG_MIPS_MSA_OPT > 0 */
 
+#if PNG_MIPS_MMI_OPT > 0
+#  ifndef PNG_MIPS_MMI_IMPLEMENTATION
+#     if defined(__mips_loongson_mmi) && (_MIPS_SIM == _ABI64)
+#        define PNG_MIPS_MMI_IMPLEMENTATION 2
+#     else /* !defined __mips_loongson_mmi  || _MIPS_SIM != _ABI64 */
+#        define PNG_MIPS_MMI_IMPLEMENTATION 0
+#     endif /* __mips_loongson_mmi  && _MIPS_SIM == _ABI64 */
+#  endif /* !PNG_MIPS_MMI_IMPLEMENTATION */
+
+#   if PNG_MIPS_MMI_IMPLEMENTATION > 0
+#      define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_mips
+#   endif
+#else
+#   define PNG_MIPS_MMI_IMPLEMENTATION 0
+#endif /* PNG_MIPS_MMI_OPT > 0 */
+
 #if PNG_POWERPC_VSX_OPT > 0
 #  define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_vsx
 #  define PNG_POWERPC_VSX_IMPLEMENTATION 1
@@ -304,6 +342,12 @@
 #  define PNG_POWERPC_VSX_IMPLEMENTATION 0
 #endif
 
+#if PNG_LOONGARCH_LSX_OPT > 0
+#   define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_lsx
+#   define PNG_LOONGARCH_LSX_IMPLEMENTATION 1
+#else
+#   define PNG_LOONGARCH_LSX_IMPLEMENTATION 0
+#endif
 
 /* Is this a build of a DLL where compilation of the object modules requires
  * different preprocessor settings to those required for a simple library?  If
@@ -542,18 +586,8 @@
     */
 #  include <float.h>
 
-#  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
-    defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
-   /* We need to check that <math.h> hasn't already been included earlier
-    * as it seems it doesn't agree with <fp.h>, yet we should really use
-    * <fp.h> if possible.
-    */
-#    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
-#      include <fp.h>
-#    endif
-#  else
-#    include <math.h>
-#  endif
+#  include <math.h>
+
 #  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
    /* Amiga SAS/C: We must include builtin FPU functions when compiling using
     * MATH=68881
@@ -1334,7 +1368,7 @@ PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth4_neon,(png_row_infop
     row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
 #endif
 
-#if PNG_MIPS_MSA_OPT > 0
+#if PNG_MIPS_MSA_IMPLEMENTATION == 1
 PNG_INTERNAL_FUNCTION(void,png_read_filter_row_up_msa,(png_row_infop row_info,
     png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
 PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub3_msa,(png_row_infop
@@ -1351,6 +1385,23 @@ PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth4_msa,(png_row_infop
     row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
 #endif
 
+#if PNG_MIPS_MMI_IMPLEMENTATION > 0
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_up_mmi,(png_row_infop row_info,
+    png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub3_mmi,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub4_mmi,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg3_mmi,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg4_mmi,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth3_mmi,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth4_mmi,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+#endif
+
 #if PNG_POWERPC_VSX_OPT > 0
 PNG_INTERNAL_FUNCTION(void,png_read_filter_row_up_vsx,(png_row_infop row_info,
     png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
@@ -1383,6 +1434,23 @@ PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth4_sse2,(png_row_infop
     row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
 #endif
 
+#if PNG_LOONGARCH_LSX_IMPLEMENTATION == 1
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_up_lsx,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub3_lsx,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub4_lsx,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg3_lsx,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg4_lsx,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth3_lsx,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth4_lsx,(png_row_infop
+    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+#endif
+
 /* Choose the best filter to use and filter the row data */
 PNG_INTERNAL_FUNCTION(void,png_write_find_filter,(png_structrp png_ptr,
     png_row_infop row_info),PNG_EMPTY);
@@ -2122,17 +2190,27 @@ PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_neon,
    (png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
 #endif
 
-#if PNG_MIPS_MSA_OPT > 0
-PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_msa,
+#if PNG_MIPS_MSA_IMPLEMENTATION == 1
+PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_mips,
    (png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
 #endif
 
+#  if PNG_MIPS_MMI_IMPLEMENTATION > 0
+PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_mips,
+   (png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
+#  endif
+
 #  if PNG_INTEL_SSE_IMPLEMENTATION > 0
 PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_sse2,
    (png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
 #  endif
 #endif
 
+#if PNG_LOONGARCH_LSX_OPT > 0
+PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_lsx,
+    (png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
+#endif
+
 PNG_INTERNAL_FUNCTION(png_uint_32, png_check_keyword, (png_structrp png_ptr,
    png_const_charp key, png_bytep new_key), PNG_EMPTY);
 
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/pngread.c b/src/java.desktop/share/native/libsplashscreen/libpng/pngread.c
index 3631e60f36b..e9e94477545 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/pngread.c
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/pngread.c
@@ -29,7 +29,7 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * Copyright (c) 2018-2019 Cosmin Truta
+ * Copyright (c) 2018-2024 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.
@@ -596,7 +596,11 @@ png_read_row(png_structrp png_ptr, png_bytep row, png_bytep dsp_row)
 #endif
 
 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
-   if (png_ptr->transformations)
+   if (png_ptr->transformations
+#     ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
+         || png_ptr->num_palette_max >= 0
+#     endif
+      )
       png_do_read_transformations(png_ptr, &row_info);
 #endif
 
@@ -813,7 +817,7 @@ png_read_end(png_structrp png_ptr, png_inforp info_ptr)
 #ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED
    /* Report invalid palette index; added at libng-1.5.10 */
    if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
-       png_ptr->num_palette_max > png_ptr->num_palette)
+       png_ptr->num_palette_max >= png_ptr->num_palette)
       png_benign_error(png_ptr, "Read palette index exceeding num_palette");
 #endif
 
@@ -1077,6 +1081,8 @@ void PNGAPI
 png_read_png(png_structrp png_ptr, png_inforp info_ptr,
     int transforms, voidp params)
 {
+   png_debug(1, "in png_read_png");
+
    if (png_ptr == NULL || info_ptr == NULL)
       return;
 
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/pngrtran.c b/src/java.desktop/share/native/libsplashscreen/libpng/pngrtran.c
index 843eb5fff2a..a393de4b79d 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/pngrtran.c
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/pngrtran.c
@@ -29,7 +29,7 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * Copyright (c) 2018-2019 Cosmin Truta
+ * Copyright (c) 2018-2024 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.
@@ -318,21 +318,20 @@ png_set_alpha_mode_fixed(png_structrp png_ptr, int mode,
    int compose = 0;
    png_fixed_point file_gamma;
 
-   png_debug(1, "in png_set_alpha_mode");
+   png_debug(1, "in png_set_alpha_mode_fixed");
 
    if (png_rtran_ok(png_ptr, 0) == 0)
       return;
 
    output_gamma = translate_gamma_flags(png_ptr, output_gamma, 1/*screen*/);
 
-   /* Validate the value to ensure it is in a reasonable range. The value
+   /* Validate the value to ensure it is in a reasonable range.  The value
     * is expected to be 1 or greater, but this range test allows for some
-    * viewing correction values.  The intent is to weed out users of this API
-    * who use the inverse of the gamma value accidentally!  Since some of these
-    * values are reasonable this may have to be changed:
+    * viewing correction values.  The intent is to weed out the API users
+    * who might use the inverse of the gamma value accidentally!
     *
-    * 1.6.x: changed from 0.07..3 to 0.01..100 (to accommodate the optimal 16-bit
-    * gamma of 36, and its reciprocal.)
+    * In libpng 1.6.0, we changed from 0.07..3 to 0.01..100, to accommodate
+    * the optimal 16-bit gamma of 36 and its reciprocal.
     */
    if (output_gamma < 1000 || output_gamma > 10000000)
       png_error(png_ptr, "output gamma out of expected range");
@@ -469,7 +468,7 @@ png_set_quantize(png_structrp png_ptr, png_colorp palette,
       int i;
 
       png_ptr->quantize_index = (png_bytep)png_malloc(png_ptr,
-          (png_alloc_size_t)((png_uint_32)num_palette * (sizeof (png_byte))));
+          (png_alloc_size_t)num_palette);
       for (i = 0; i < num_palette; i++)
          png_ptr->quantize_index[i] = (png_byte)i;
    }
@@ -486,7 +485,7 @@ png_set_quantize(png_structrp png_ptr, png_colorp palette,
 
          /* Initialize an array to sort colors */
          png_ptr->quantize_sort = (png_bytep)png_malloc(png_ptr,
-             (png_alloc_size_t)((png_uint_32)num_palette * (sizeof (png_byte))));
+             (png_alloc_size_t)num_palette);
 
          /* Initialize the quantize_sort array */
          for (i = 0; i < num_palette; i++)
@@ -620,11 +619,9 @@ png_set_quantize(png_structrp png_ptr, png_colorp palette,
 
          /* Initialize palette index arrays */
          png_ptr->index_to_palette = (png_bytep)png_malloc(png_ptr,
-             (png_alloc_size_t)((png_uint_32)num_palette *
-             (sizeof (png_byte))));
+             (png_alloc_size_t)num_palette);
          png_ptr->palette_to_index = (png_bytep)png_malloc(png_ptr,
-             (png_alloc_size_t)((png_uint_32)num_palette *
-             (sizeof (png_byte))));
+             (png_alloc_size_t)num_palette);
 
          /* Initialize the sort array */
          for (i = 0; i < num_palette; i++)
@@ -789,12 +786,11 @@ png_set_quantize(png_structrp png_ptr, png_colorp palette,
       size_t num_entries = ((size_t)1 << total_bits);
 
       png_ptr->palette_lookup = (png_bytep)png_calloc(png_ptr,
-          (png_alloc_size_t)(num_entries * (sizeof (png_byte))));
+          (png_alloc_size_t)(num_entries));
 
-      distance = (png_bytep)png_malloc(png_ptr, (png_alloc_size_t)(num_entries *
-          (sizeof (png_byte))));
+      distance = (png_bytep)png_malloc(png_ptr, (png_alloc_size_t)num_entries);
 
-      memset(distance, 0xff, num_entries * (sizeof (png_byte)));
+      memset(distance, 0xff, num_entries);
 
       for (i = 0; i < num_palette; i++)
       {
@@ -998,7 +994,7 @@ void PNGFAPI
 png_set_rgb_to_gray_fixed(png_structrp png_ptr, int error_action,
     png_fixed_point red, png_fixed_point green)
 {
-   png_debug(1, "in png_set_rgb_to_gray");
+   png_debug(1, "in png_set_rgb_to_gray_fixed");
 
    /* Need the IHDR here because of the check on color_type below. */
    /* TODO: fix this */
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/pngrutil.c b/src/java.desktop/share/native/libsplashscreen/libpng/pngrutil.c
index 524297c5a10..5280140d12b 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/pngrutil.c
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/pngrutil.c
@@ -29,7 +29,7 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * Copyright (c) 2018-2022 Cosmin Truta
+ * Copyright (c) 2018-2024 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.
@@ -54,7 +54,7 @@ png_get_uint_31(png_const_structrp png_ptr, png_const_bytep buf)
    if (uval > PNG_UINT_31_MAX)
       png_error(png_ptr, "PNG unsigned integer out of range");
 
-   return (uval);
+   return uval;
 }
 
 #if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_READ_cHRM_SUPPORTED)
@@ -168,7 +168,7 @@ png_read_sig(png_structrp png_ptr, png_inforp info_ptr)
    if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check) != 0)
    {
       if (num_checked < 4 &&
-          png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4))
+          png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4) != 0)
          png_error(png_ptr, "Not a PNG file");
       else
          png_error(png_ptr, "PNG file corrupted by ASCII conversion");
@@ -199,7 +199,7 @@ png_read_chunk_header(png_structrp png_ptr)
    /* Put the chunk name into png_ptr->chunk_name. */
    png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(buf+4);
 
-   png_debug2(0, "Reading %lx chunk, length = %lu",
+   png_debug2(0, "Reading chunk typeid = 0x%lx, length = %lu",
        (unsigned long)png_ptr->chunk_name, (unsigned long)length);
 
    /* Reset the crc and run it over the chunk name. */
@@ -266,10 +266,10 @@ png_crc_finish(png_structrp png_ptr, png_uint_32 skip)
       else
          png_chunk_error(png_ptr, "CRC error");
 
-      return (1);
+      return 1;
    }
 
-   return (0);
+   return 0;
 }
 
 /* Compare the CRC stored in the PNG file with that calculated by libpng from
@@ -305,11 +305,11 @@ png_crc_error(png_structrp png_ptr)
    if (need_crc != 0)
    {
       crc = png_get_uint_32(crc_bytes);
-      return ((int)(crc != png_ptr->crc));
+      return crc != png_ptr->crc;
    }
 
    else
-      return (0);
+      return 0;
 }
 
 #if defined(PNG_READ_iCCP_SUPPORTED) || defined(PNG_READ_iTXt_SUPPORTED) ||\
@@ -449,8 +449,7 @@ png_inflate_claim(png_structrp png_ptr, png_uint_32 owner)
             png_ptr->flags |= PNG_FLAG_ZSTREAM_INITIALIZED;
       }
 
-#if ZLIB_VERNUM >= 0x1290 && \
-   defined(PNG_SET_OPTION_SUPPORTED) && defined(PNG_IGNORE_ADLER32)
+#ifdef PNG_DISABLE_ADLER32_CHECK_SUPPORTED
       if (((png_ptr->options >> PNG_IGNORE_ADLER32) & 3) == PNG_OPTION_ON)
          /* Turn off validation of the ADLER32 checksum in IDAT chunks */
          ret = inflateValidate(&png_ptr->zstream, 0);
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/pngset.c b/src/java.desktop/share/native/libsplashscreen/libpng/pngset.c
index 62612a02278..f53ab6fa1d1 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/pngset.c
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/pngset.c
@@ -29,7 +29,7 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * Copyright (c) 2018-2023 Cosmin Truta
+ * Copyright (c) 2018-2024 Cosmin Truta
  * Copyright (c) 1998-2018 Glenn Randers-Pehrson
  * Copyright (c) 1996-1997 Andreas Dilger
  * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
@@ -791,11 +791,11 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
 {
    int i;
 
-   png_debug1(1, "in %lx storage function", png_ptr == NULL ? 0xabadca11U :
-      (unsigned long)png_ptr->chunk_name);
+   png_debug1(1, "in text storage function, chunk typeid = 0x%lx",
+      png_ptr == NULL ? 0xabadca11UL : (unsigned long)png_ptr->chunk_name);
 
    if (png_ptr == NULL || info_ptr == NULL || num_text <= 0 || text_ptr == NULL)
-      return(0);
+      return 0;
 
    /* Make sure we have enough space in the "text" array in info_struct
     * to hold all of the incoming text_ptr objects.  This compare can't overflow
@@ -975,7 +975,7 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
       png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
    }
 
-   return(0);
+   return 0;
 }
 #endif
 
@@ -1091,6 +1091,8 @@ png_set_sPLT(png_const_structrp png_ptr,
 {
    png_sPLT_tp np;
 
+   png_debug1(1, "in %s storage function", "sPLT");
+
    if (png_ptr == NULL || info_ptr == NULL || nentries <= 0 || entries == NULL)
       return;
 
@@ -1565,7 +1567,7 @@ void PNGAPI
 png_set_rows(png_const_structrp png_ptr, png_inforp info_ptr,
     png_bytepp row_pointers)
 {
-   png_debug1(1, "in %s storage function", "rows");
+   png_debug(1, "in png_set_rows");
 
    if (png_ptr == NULL || info_ptr == NULL)
       return;
@@ -1584,6 +1586,8 @@ png_set_rows(png_const_structrp png_ptr, png_inforp info_ptr,
 void PNGAPI
 png_set_compression_buffer_size(png_structrp png_ptr, size_t size)
 {
+   png_debug(1, "in png_set_compression_buffer_size");
+
    if (png_ptr == NULL)
       return;
 
@@ -1655,6 +1659,8 @@ void PNGAPI
 png_set_user_limits(png_structrp png_ptr, png_uint_32 user_width_max,
     png_uint_32 user_height_max)
 {
+   png_debug(1, "in png_set_user_limits");
+
    /* Images with dimensions larger than these limits will be
     * rejected by png_set_IHDR().  To accept any PNG datastream
     * regardless of dimensions, set both limits to 0x7fffffff.
@@ -1670,6 +1676,8 @@ png_set_user_limits(png_structrp png_ptr, png_uint_32 user_width_max,
 void PNGAPI
 png_set_chunk_cache_max(png_structrp png_ptr, png_uint_32 user_chunk_cache_max)
 {
+   png_debug(1, "in png_set_chunk_cache_max");
+
    if (png_ptr != NULL)
       png_ptr->user_chunk_cache_max = user_chunk_cache_max;
 }
@@ -1679,6 +1687,8 @@ void PNGAPI
 png_set_chunk_malloc_max(png_structrp png_ptr,
     png_alloc_size_t user_chunk_malloc_max)
 {
+   png_debug(1, "in png_set_chunk_malloc_max");
+
    if (png_ptr != NULL)
       png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
 }
diff --git a/src/java.desktop/share/native/libsplashscreen/libpng/pngtrans.c b/src/java.desktop/share/native/libsplashscreen/libpng/pngtrans.c
index 89a62191b6f..2350057e70e 100644
--- a/src/java.desktop/share/native/libsplashscreen/libpng/pngtrans.c
+++ b/src/java.desktop/share/native/libsplashscreen/libpng/pngtrans.c
@@ -29,7 +29,7 @@
  * However, the following notice accompanied the original version of this
  * file and, per its terms, should not be removed:
  *
- * Copyright (c) 2018 Cosmin Truta
+ * Copyright (c) 2018-2024 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.
@@ -131,10 +131,10 @@ png_set_interlace_handling(png_structrp png_ptr)
    if (png_ptr != 0 && png_ptr->interlaced != 0)
    {
       png_ptr->transformations |= PNG_INTERLACE;
-      return (7);
+      return 7;
    }
 
-   return (1);
+   return 1;
 }
 #endif
 
@@ -526,6 +526,8 @@ png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
    png_bytep dp = row; /* destination pointer */
    png_bytep ep = row + row_info->rowbytes; /* One beyond end of row */
 
+   png_debug(1, "in png_do_strip_channel");
+
    /* At the start sp will point to the first byte to copy and dp to where
     * it is copied to.  ep always points just beyond the end of the row, so
     * the loop simply copies (channels-1) channels until sp reaches ep.
@@ -726,6 +728,8 @@ png_do_bgr(png_row_infop row_info, png_bytep row)
 void /* PRIVATE */
 png_do_check_palette_indexes(png_structrp png_ptr, png_row_infop row_info)
 {
+   png_debug(1, "in png_do_check_palette_indexes");
+
    if (png_ptr->num_palette < (1 << row_info->bit_depth) &&
       png_ptr->num_palette > 0) /* num_palette can be 0 in MNG files */
    {
@@ -736,7 +740,7 @@ png_do_check_palette_indexes(png_structrp png_ptr, png_row_infop row_info)
        * forms produced on either GCC or MSVC.
        */
       int padding = PNG_PADBITS(row_info->pixel_depth, row_info->width);
-      png_bytep rp = png_ptr->row_buf + row_info->rowbytes - 1;
+      png_bytep rp = png_ptr->row_buf + row_info->rowbytes;
 
       switch (row_info->bit_depth)
       {
@@ -861,7 +865,7 @@ png_voidp PNGAPI
 png_get_user_transform_ptr(png_const_structrp png_ptr)
 {
    if (png_ptr == NULL)
-      return (NULL);
+      return NULL;
 
    return png_ptr->user_transform_ptr;
 }