跨越OpenGL&Direct3D的鴻溝

http://www.klayge.org/2011/07/15/%E8%B7%A8%E8%B6%8Aopengl%E5%92%8Cd3d%E7%9A%84%E9%B8%BF%E6%B2%9F%EF%BC%88%E4%B8%80%EF%BC%89%EF%BC%9A%E5%BC%80%E7%AF%87/