是否可以在canvas HTML5中设置背景图像，并可以做一些油漆功能，如撤销、删除、清除、保存背景图像?

I want to know about canvas HTML5. In my base canvas element i want to set background image,and on that i want to perform some functionality like in paint Erase,Undo,Clear and save that effected image(after applying all the effect undo,clear).. Any suggestion or example..I want to know about canvas HTML5. In my base c