Upgrade libpng to 1.6.55

TheMostDiligent · TheMostDiligent · commit ed62f2ffc38e · 2026-03-02T20:56:30.000-08:00
diff --git a/ThirdParty/CMakeLists.txt b/ThirdParty/CMakeLists.txt
@@ -37,7 +37,6 @@ if (NOT TARGET ZLIB::ZLIB)
 endif()
 
 if (NOT TARGET PNG::PNG)
-    set(PNG_BUILD_ZLIB ON CACHE BOOL "Use find_package(zlib) to find ZLib location")
     set(PNG_SHARED OFF CACHE BOOL "Build shared version of libpng")
     set(PNG_TOOLS OFF CACHE BOOL "Build libpng tools")
     set(PNG_TESTS OFF CACHE BOOL "Build libpng tests")
diff --git a/ThirdParty/libpng b/ThirdParty/libpng
@@ -1 +1 @@
-Subproject commit 1402700196d703f6228155d3a626be78c378d228
+Subproject commit 65bc84e803c0ccbf7aa1023e91b5808586ea1b66
diff --git a/ThirdParty/zlib.cmake b/ThirdParty/zlib.cmake
@@ -3,6 +3,7 @@ cmake_minimum_required (VERSION 3.10)
 project(ZLib C)
 
 set(ZLIB_DIR ${CMAKE_CURRENT_SOURCE_DIR}/zlib)
+set(ZLIB_ROOT ${ZLIB_DIR} CACHE PATH "zlib root directory" FORCE)
 
 set(ZLIB_SOURCE 
     ${ZLIB_DIR}/adler32.c
