6.6.3 - Alpha5 - images.save 方法使用 quality 参数时支持 png 格式的文件体积压缩 (issue #367)

libs/imagequant/external/libimagequant/CMakeLists.txt

@@ -0,0 +1,56 @@
+cmake_minimum_required(VERSION 2.6)
+file(READ version.txt VERSION)
+
+project(imagequant C)
+
+if(${CMAKE_SYSTEM_PROCESSOR} STREQUAL ARM64)
+  option(BUILD_WITH_SSE "Use SSE" OFF)
+else()
+  option(BUILD_WITH_SSE "Use SSE" ON)
+endif()
+
+if(BUILD_WITH_SSE)
+  add_definitions(-DUSE_SSE=1)
+endif()
+
+find_package(OpenMP)
+if(OPENMP_FOUND)
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
+endif()
+
+include_directories(${CMAKE_SOURCE_DIR})
+
+if(CMAKE_COMPILER_IS_GNUCC)
+  add_compile_options("-std=c99")
+endif()
+
+add_library(imagequant SHARED 
+  libimagequant.c
+  blur.c
+  mediancut.c
+  mempool.c
+  nearest.c
+  pam.c
+  kmeans.c
+)
+
+add_library(imagequant_a STATIC
+  libimagequant.c
+  blur.c
+  mediancut.c
+  mempool.c
+  nearest.c
+  pam.c
+  kmeans.c
+)
+set_target_properties(imagequant PROPERTIES SOVERSION 0
+  VERSION 0.0)
+
+set(PREFIX ${CMAKE_INSTALL_PREFIX})
+configure_file(imagequant.pc.in imagequant.pc @ONLY)
+
+install(TARGETS imagequant        LIBRARY           DESTINATION ${LIB_INSTALL_DIR})
+install(FILES                     libimagequant.h   DESTINATION include)
+install(FILES ${CMAKE_BINARY_DIR}/libimagequant_a.a DESTINATION ${LIB_INSTALL_DIR} RENAME libimagequant.a)
+install(FILES ${CMAKE_BINARY_DIR}/imagequant.pc     DESTINATION ${LIB_INSTALL_DIR}/pkgconfig)