get_sdl2.cmake

set(SDL2_VERSION "2.0.3")

set(SDL2_SOURCE_DIR "${CMAKE_BINARY_DIR}/SDL2-${SDL2_VERSION}.src")
set(SDL2_BINARY_DIR "${CMAKE_BINARY_DIR}/SDL2-${SDL2_VERSION}.bin")
set(SDL2_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/SDL2-${SDL2_VERSION}")

if(EXISTS "${CMAKE_BINARY_DIR}/SDL2-${SDL2_VERSION}.tar.gz")

else()
	
	file(DOWNLOAD "https://www.libsdl.org/release/SDL2-${SDL2_VERSION}.tar.gz" "${CMAKE_BINARY_DIR}/SDL2-${SDL2_VERSION}.tar.gz")
	
endif()

if(EXISTS "${SDL2_SOURCE_DIR}")

else()
	
	file(MAKE_DIRECTORY ${SDL2_SOURCE_DIR}.tmp)
	
	execute_process(
		COMMAND ${CMAKE_COMMAND} -E tar xzf ${CMAKE_BINARY_DIR}/SDL2-${SDL2_VERSION}.tar.gz . ../
		WORKING_DIRECTORY ${SDL2_SOURCE_DIR}.tmp
	)
	
	file(RENAME "${SDL2_SOURCE_DIR}.tmp/SDL2-${SDL2_VERSION}" "${SDL2_SOURCE_DIR}.tmp/SDL2-${SDL2_VERSION}.src")
	file(RENAME "${SDL2_SOURCE_DIR}.tmp/SDL2-${SDL2_VERSION}.src" "${SDL2_SOURCE_DIR}")
	
	execute_process(COMMAND ${CMAKE_COMMAND} -E remove_directory ${SDL2_SOURCE_DIR}.tmp)
endif()

if(EXISTS "${SDL2_INSTALL_PREFIX}")
	
else()
	file(MAKE_DIRECTORY "${SDL2_INSTALL_PREFIX}")
	file(MAKE_DIRECTORY "${SDL2_BINARY_DIR}")
	
	message(STATUS "[${PROJECT_NAME} SDL2] Configuring...")
	execute_process(
		COMMAND ${CMAKE_COMMAND} ${SDL2_SOURCE_DIR} -G ${CMAKE_GENERATOR} -DCMAKE_INSTALL_PREFIX=${SDL2_INSTALL_PREFIX} -DCMAKE_BUILD_TYPE=Release -DRENDER_D3D=OFF -DDIRECTX=OFF
		WORKING_DIRECTORY ${SDL2_BINARY_DIR}
		OUTPUT_QUIET
	)
	
	message(STATUS "[${PROJECT_NAME} SDL2] Building...")
	execute_process(
		COMMAND ${CMAKE_COMMAND} --build .
		WORKING_DIRECTORY ${SDL2_BINARY_DIR}
		OUTPUT_QUIET
	)
	
	message(STATUS "[${PROJECT_NAME} SDL2] Installing...")
	execute_process(
		COMMAND ${CMAKE_COMMAND} -P ${SDL2_BINARY_DIR}/cmake_install.cmake
		OUTPUT_QUIET
	)
endif()

message(STATUS "[${PROJECT_NAME} SDL2] DONE.")