Simple DirectMedia Layer, 简称SDL，是一个自由的跨平台的多媒体开发包，主要通过OpenGL和2D视频帧缓冲(framebuffer)提供对音频、键盘、鼠标、游戏操纵杆 (joystick)和3D硬件的底层访问。它被广泛的应用于MPEG回放软件、模拟器和多个著名游戏中，如获得大奖的《文明：权倾天下》-Simple DirectMedia Layer, abbreviated SDL, is a free cross-platform multimedia development package, mainly through OpenGL and 2D video frame buffer (framebuffer) provides audio, keyboard, mouse, joystick (joystick) and 3D low-level hardware access. It is widely used in MPEG playback software, emulators, and many famous games, such as the award-winning " Civilization: Call to Power"