一个很好的SDL绘图函数库，可以添加到自己的程序中使用，可以绘制各种图形，包括直线、矩形、圆等-a good SDL mapping functions that can be added to its own procedures for the use, can draw various graphics, including linear, rectangular, round, etc.

sdl的例子 包括sdk和doc 例子内容包括线程 图片显示等-sdl examples include the sdk and doc examples include threads, such as picture show