SDL(Simple DirectMedia Layer)是一个自由的跨平台的多媒体开发包，适用于 游戏、游戏SDK、演示软件、模拟器、MPEG播放器和其他应用软件-SDL (Simple DirectMedia Layer) is a free cross-platform multimedia development kit for games, game SDK, demo software, emulators, MPEG players and other applications