Simple DirectMedia Layer库，简称 SDL，是为数不多的商业游戏开发公司使用的免费软件库之一。它提供跨平台的二维帧缓冲区图形和音频服务，它支持 Linux、Win32 和 BeOS。也不同程度地支持其它平台，包括 Solaris、IRIX、FreeBSD 和 MacOS。除了大量的服务，包括线程、独立于字节存储次序的宏和 CD 音频，SDL 还提供了一个简单的 API，它允许您尽可能接近本机硬件。使用 SDL 有三重优点：稳定、简单和灵活。-Simple DirectMedia Layer library, or SDL, is one of the few commercial game development company uses one of the free software library. It provides two-dimensional cross-platform graphics fr a me buffer and audio services, it supports Linux, Win32 and BeOS. To varying degrees, also support other platforms, including Solaris, IRIX, FreeBSD and MacOS. Apart from a large number of services, including threads, independent of the byte storage order of the macro and CD audio, SDL also provides a simple API, it allows you as close as possible to the local hardware. The use of SDL has three advantages: stable, simple and flexible.