HTML5 Canvas Sample

Star Spinner
http://www.html5canvastutorials.com/labs/html5-canvas-star-spinner/

Image Mask
http://playground.benbarnett.net/canvas-mask/
刮刮樂實作想法：(未實作驗證)

1. 完全使用canvas實作：將圖片及mask都用canvas做。參考
2. canvas疊在圖片上，在canvas上畫上透明色。

HTML5 Canvas Demos

http://slodive.com/web-development/html5-canvas-demos-and-applications/

http://www.thewildernessdowntown.com/

HTML5 Canvas Lib

Processing
http://processingjs.org/