1 files changed, 121 insertions, 0 deletions
diff --git a/vcpkg/ports/libpng/portfile.cmake b/vcpkg/ports/libpng/portfile.cmake
new file mode 100644
index 0000000..fd97525
--- /dev/null
+++ b/vcpkg/ports/libpng/portfile.cmake
@@ -0,0 +1,121 @@
+# Download the apng patch
+set(LIBPNG_APNG_PATCH_PATH "")
+if ("apng" IN_LIST FEATURES)
+    if(VCPKG_HOST_IS_WINDOWS)
+        # Get (g)awk and gzip installed
+        vcpkg_acquire_msys(MSYS_ROOT PACKAGES gawk gzip)
+        set(AWK_EXE_PATH "${MSYS_ROOT}/usr/bin")
+        vcpkg_add_to_path("${AWK_EXE_PATH}")
+    endif()
+
+    set(LIBPNG_APNG_PATCH_NAME "libpng-${VERSION}-apng.patch")
+    vcpkg_download_distfile(LIBPNG_APNG_PATCH_ARCHIVE
+        URLS "https://downloads.sourceforge.net/project/libpng-apng/libpng16/${VERSION}/${LIBPNG_APNG_PATCH_NAME}.gz"
+        FILENAME "${LIBPNG_APNG_PATCH_NAME}.gz"
+        SHA512 f9b3b5ef42a7d3e61b435af69e04174c9ea6319d8fc8b5fd3443a3a9f0a0e9803bc2b0fe6658a91d0a76b06dfd846d29b63edffebeedd1cb26f4d2cf0c87f8b1
+    )
+    set(LIBPNG_APNG_PATCH_PATH "${CURRENT_BUILDTREES_DIR}/src/${LIBPNG_APNG_PATCH_NAME}")
+    if (NOT EXISTS "${LIBPNG_APNG_PATCH_PATH}")
+        file(INSTALL "${LIBPNG_APNG_PATCH_ARCHIVE}" DESTINATION "${CURRENT_BUILDTREES_DIR}/src")
+        vcpkg_execute_required_process(
+            COMMAND gzip -d "${LIBPNG_APNG_PATCH_NAME}.gz"
+            WORKING_DIRECTORY "${CURRENT_BUILDTREES_DIR}/src"
+            ALLOW_IN_DOWNLOAD_MODE
+            LOGNAME extract-patch.log
+        )
+    endif()
+endif()
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO pnggroup/libpng
+    REF v${VERSION}
+    SHA512 34c806e0dda960b480ce2f5ea13e2e55a9540f07c51948be25d312b901c431bc814f730f9322a2e3b6f88d4104a0c49bde9e616762b342d07db44e2c7fd5f2dc
+    HEAD_REF master
+    PATCHES
+        "${LIBPNG_APNG_PATCH_PATH}"
+        cmake.patch
+)
+
+string(COMPARE EQUAL "${VCPKG_LIBRARY_LINKAGE}" "dynamic" PNG_SHARED)
+string(COMPARE EQUAL "${VCPKG_LIBRARY_LINKAGE}" "static" PNG_STATIC)
+
+vcpkg_check_features(
+    OUT_FEATURE_OPTIONS FEATURE_OPTIONS
+    FEATURES
+        tools PNG_TOOLS
+    INVERTED_FEATURES
+        tools SKIP_INSTALL_PROGRAMS
+)
+
+vcpkg_list(SET LIBPNG_HARDWARE_OPTIMIZATIONS_OPTION)
+if(VCPKG_TARGET_IS_IOS)
+    vcpkg_list(APPEND LIBPNG_HARDWARE_OPTIMIZATIONS_OPTION "-DPNG_HARDWARE_OPTIMIZATIONS=OFF")
+endif()
+
+vcpkg_list(SET LD_VERSION_SCRIPT_OPTION)
+if(VCPKG_TARGET_IS_ANDROID)
+    vcpkg_list(APPEND LD_VERSION_SCRIPT_OPTION "-Dld-version-script=OFF")
+    if(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm")
+        vcpkg_cmake_get_vars(cmake_vars_file)
+        include("${cmake_vars_file}")
+        if(VCPKG_DETECTED_CMAKE_ANDROID_ARM_NEON)
+            vcpkg_list(APPEND LIBPNG_HARDWARE_OPTIMIZATIONS_OPTION "-DPNG_ARM_NEON=on")
+        else()
+            # for armeabi-v7a, check whether NEON is available
+            vcpkg_list(APPEND LIBPNG_HARDWARE_OPTIMIZATIONS_OPTION "-DPNG_ARM_NEON=check")
+        endif()
+    endif()
+endif()
+
+if(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64" AND VCPKG_TARGET_IS_LINUX)
+  vcpkg_list(APPEND LIBPNG_HARDWARE_OPTIMIZATIONS_OPTION "-DPNG_ARM_NEON=on")
+endif()
+
+vcpkg_cmake_configure(
+    SOURCE_PATH "${SOURCE_PATH}"
+    OPTIONS
+        ${LIBPNG_HARDWARE_OPTIMIZATIONS_OPTION}
+        ${LD_VERSION_SCRIPT_OPTION}
+        -DPNG_STATIC=${PNG_STATIC}
+        -DPNG_SHARED=${PNG_SHARED}
+        -DPNG_FRAMEWORK=OFF
+        -DPNG_TESTS=OFF
+        -DSKIP_INSTALL_EXECUTABLES=ON
+        -DSKIP_INSTALL_FILES=OFF
+        ${FEATURE_OPTIONS}
+    OPTIONS_DEBUG
+        -DSKIP_INSTALL_HEADERS=ON
+    MAYBE_UNUSED_VARIABLES
+        PNG_ARM_NEON
+)
+vcpkg_cmake_install()
+vcpkg_cmake_config_fixup(PACKAGE_NAME png CONFIG_PATH lib/cmake/PNG)
+vcpkg_cmake_config_fixup(CONFIG_PATH lib/libpng)
+file(INSTALL "${CMAKE_CURRENT_LIST_DIR}/vcpkg-cmake-wrapper.cmake" DESTINATION "${CURRENT_PACKAGES_DIR}/share/png")
+
+# unofficial legacy usage
+file(INSTALL "${CMAKE_CURRENT_LIST_DIR}/libpng-config.cmake" DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}")
+
+vcpkg_fixup_pkgconfig()
+if(VCPKG_TARGET_IS_WINDOWS AND NOT VCPKG_TARGET_IS_MINGW)
+    if(NOT VCPKG_BUILD_TYPE)
+        vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig/libpng16.pc" "-lpng16" "-llibpng16d")
+        file(INSTALL "${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig/libpng16.pc" DESTINATION "${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig" RENAME "libpng.pc")
+    endif()
+    vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/lib/pkgconfig/libpng16.pc" "-lpng16" "-llibpng16")
+elseif(NOT VCPKG_BUILD_TYPE)
+    vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig/libpng16.pc" "-lpng16" "-lpng16d")
+    file(INSTALL "${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig/libpng16.pc" DESTINATION "${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig" RENAME "libpng.pc")
+endif()
+file(INSTALL "${CURRENT_PACKAGES_DIR}/lib/pkgconfig/libpng16.pc" DESTINATION "${CURRENT_PACKAGES_DIR}/lib/pkgconfig" RENAME "libpng.pc")
+
+vcpkg_copy_pdbs()
+
+if(PNG_TOOLS)
+    vcpkg_copy_tools(TOOL_NAMES "pngfix" "png-fix-itxt" AUTO_CLEAN)
+endif()
+
+file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/share")
+file(INSTALL "${CMAKE_CURRENT_LIST_DIR}/usage" DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}")
+vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/LICENSE")