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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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This commit is contained in:
Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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40
layout/reftests/bugs/670442-1-ref.html Normal file
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<!DOCTYPE html>
<html>
<body>
<div>
<canvas id="c1" width="400" height="400"></canvas>
<canvas id="c2" width="400" height="400"></canvas>
</div>
<script type="text/javascript">
var canv1 = document.getElementById('c1');
var canv2 = document.getElementById('c2');
var ctx1 = canv1.getContext('2d');
var ctx2 = canv2.getContext('2d');
ctx1.strokeStyle = '#FF0000';
ctx1.moveTo(10, 10);
ctx1.lineTo(390, 390);
ctx1.stroke();
function doTest()
{
// Save img data
var imgData = ctx1.getImageData(0, 0, canv1.width, canv1.height);
// Resize canvas - seems to cause the bug
canv1.width = 0;
canv1.height = 0;
canv1.width = 400;
canv1.height = 400;
// Put image data from ctx1 to ctx2
ctx2.putImageData(imgData, 0, 0);
// Draw canvas2 on canvas1
ctx1.drawImage(canv2, 0, 0);
};
doTest();
</script>
</body>
</html>