canvas 学习资料

http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#the-canvas-element/

 

https://developer.mozilla.org/en-US/docs/HTML/Canvas/Tutorial?redirectlocale=en-US&redirectslug=Canvas_tutorial

 

http://simon.html5.org/dump/html5-canvas-cheat-sheet.html