Info

Test des performances d'affichage de canvas html5.

En mode double layer : un premier canvas affiche une image de fond et un second canvas (affiché au dessus du premier) s'efface puis affiche une petite image.

En mode one layer : un seul canvas s'efface, puis affiche une image de fond et enfin une petite image.

Preparation code

<div style="position: relative; width: 400px; height: 400px">
<canvas id="background" width="400" height="400" style="position:absolute;z-index:0;border: 1px solid #000000;">
</canvas>
<canvas id="foreground" width="400" height="400" style="position:absolute;z-index:1;border: 1px solid #000000;">
</canvas>
</div>
<script>
var bgCtx= document.querySelector('#background').getContext('2d');
var fgCtx= document.querySelector('#foreground').getContext('2d');

var imgBg = new Image();
imgBg.src = 'http://www.faire-des-jeux.com/jsperf/background.jpg';

                
var     imgFg = new Image();
imgFg.src = 'http://www.faire-des-jeux.com/jsperf/module.png';
</script>

Preparation code output

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fgCtx.clearRect(0,0,400,400);
fgCtx.drawImage(imgBg,0,0);
fgCtx.drawImage(imgFg,200,200);


 

fgCtx.clearRect(0,0,400,400);
bgCtx.clearRect(0,0,400,400);
bgCtx.drawImage(imgBg,0,0);
fgCtx.drawImage(imgFg,200,200);
 

fgCtx.clearRect(0,0,400,400);
bgCtx.drawImage(imgBg,0,0);
fgCtx.drawImage(imgFg,200,200);

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 3: published by Franck Dubois on 4th January 2013
• Revision 4: published by Spirin Vladimir on 10th January 2013
• Revision 5: published by PlaneWorld on 20th January 2013
• Revision 6: published on 29th January 2013
• Revision 9: published by HotSix on 30th January 2013

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