游戏开发

Double Buffering是啥？
Double Buffering is a technique used to remove the visual tearing associated with drawing directly to the screen. It gets its name because you use two graphics buffers to draw the final image: one that resides in-memory (the back buffer), and the buffer which is displayed on the screen (front buffer). You can think of the back buffer as a kind of scratch pad which is built up as the individual elements that make up the final scene write to it. Once a frame has been drawn it is copied to the front buffer in one operation. The screen then displays the contents of the front buffer.

参考链接：
http://www.brighthub.com/internet/web-development/articles/11012.aspx