Shulou(Shulou.com)06/01 Report--

This article introduces the knowledge of "how to draw a picture with HTML5's canvas and save it into a picture". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The jcanvas plug-in is used.

Copy the code

The code is as follows:

Var maxX=-1

Var maxY=-1

Var minX=99999

Var minY=99999

Function checkData (event) {

Var xcolors event.pageXmuri $('canvas'). Offset (). Left

Var yearly event.pageYmuri $('canvas'). Offset (). Top

If (x > maxX) {

MaxX=x

} else if (xmaxY) {

MaxY=y

} else if (y

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