Two new canvases are created. Each canvas has a picture. How to put one canvas on top of another canvas? The effect is that one picture floats on top of the other picture.
It should be possible to set the coordinates
Reference
http://www.w3school.com.cn /html5/html_5_canvas.asp
http://www.cnblogs.com/myssh/archive/2011/11/24/2261901.html
This can’t be solved
Are you Want to set the canvas background above to be transparent? Try it to see if it meets your needs.
