Examples of HTML5 use of canvas drawings

Source: Internet
Author: User

For canvas drawings, you can use the Todataurl () method to save the drawn image and then use it two times for the object element.

<p>canvas Drawing </p>
<canvas id= "MyCanvas" width= "height=" ></canvas>
<p> Restore Drawing </p>
<object type= "Image/png" id= "MyImage" ></object>

JS Processing

<script type= "Text/javascript" >
var canvas = document.getElementById ("MyCanvas");
if (canvas &&canvas.getcontext)
{
var cxt = Canvas.getcontext (' 2d ');
Cxt.fillstyle= "#FF0000";
Cxt.fillrect (0,0,150,75);
}
var url=canvas.todataurl (); Returns the base64 encoded data for a picture, and can also pass a MIME type format, such as Image/png
var img = document.getElementById ("MyImage");
Img.data=url; Restores a picture, specifies a mime, or can use the SRC attribute


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