CMake USE_CPU_GFX support

CMakeLists.txt

@@ -4,7 +4,7 @@ project(ponscripter)
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake;${CMAKE_CURRENT_SOURCE_DIR}/cmake/sdl2)
 
 option(USE_STEAM "Enable Steam Support" OFF)
-option(USE_CPU_GFX "Custom graphics using intrinsics" OFF)
+option(USE_CPU_GFX "Custom graphics using intrinsics" ON)
 option(ENABLE_GAME_CONTROLLERS "Enable support for game controllers" ON)
 
 # Workaround for bug on macOS where if you have Mono installed, CMake will prefer the (old) versions of JPEG and PNG that ship with it, even though you'll be linking with the dylibs in /usr/local/

src/CMakeLists.txt

@@ -131,3 +131,16 @@ elseif (UNIX AND NOT APPLE)
 			LINUX
 			USE_OGG_VORBIS)
 endif ()
+
+if (USE_CPU_GFX)
+	if (CMAKE_SYSTEM_PROCESSOR STREQUAL x86_64 OR CMAKE_SYSTEM_PROCESSOR STREQUAL amd64 OR CMAKE_SYSTEM_PROCESSOR STREQUAL i686)
+		target_compile_definitions(ponscr PRIVATE USE_X86_GFX)
+		set_source_files_properties(graphics_mmx.cpp PROPERTIES COMPILE_FLAGS "-mmmx")
+		set_source_files_properties(graphics_sse2.cpp PROPERTIES COMPILE_FLAGS "-msse2")
+	elseif (CMAKE_SYSTEM_PROCESSOR STREQUAL ppc OR CMAKE_SYSTEM_PROCESSOR STREQUAL ppc64)
+		target_compile_definitions(ponscr PRIVATE USE_PPC_GFX)
+		set_source_files_properties(graphics_altivec.cpp PROPERTIES COMPILE_FLAGS "-maltivec")
+	else()
+		message(FATAL_ERROR "Unrecognized architecture ${CMAKE_SYSTEM_PROCESSOR}.  Disable USE_CPU_GFX to continue.")
+	endif()
+endif()