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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=731419
-->
<head>
<title>Test for Bug 731419 - Draw an ostensibly discarded image to a canvas</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<!--
Load an image in an iframe, then draw that image to a canvas. Then set the
iframe to display:none (after bug 731419, this causes the image's decoded
data to be discarded) and draw the image to a canvas again. We should draw
the same image data both times.
-->
<script>
SimpleTest.waitForExplicitFinish();
var data1;
function drawImage()
{
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
var iframeDoc = document.getElementById('iframe').contentDocument;
ctx.clearRect(0, 0, canvas.height, canvas.width);
ctx.drawImage(iframeDoc.getElementById('image'), 0, 0);
return canvas.toDataURL();
}
function iframeLoad()
{
data1 = drawImage();
document.getElementById('iframe').style.display = 'none';
// Spin the event loop a few times to give the image in the display:none
// iframe a chance to be discarded.
SimpleTest.executeSoon(function() {
SimpleTest.executeSoon(function() {
SimpleTest.executeSoon(function() {
step2();
});
});
});
}
function step2()
{
is(drawImage(), data1, "Same image before and after iframe display:none");
SimpleTest.finish();
}
</script>
<canvas id='canvas'></canvas>
<iframe id='iframe' onload='iframeLoad()' srcdoc='<img id="image"
src="data:image/png;base64,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b52h3BCviVHOHv2bvmydyvwOM5MSmch9Ji4/SxMNcaNJTw707zdJmBqeo+G5BuO/V6AzQ5Oo01MI
KBaTOOis3rPZrKeqrbn2hwXA10fY7zvicqeZKPQ8YpKxJCgIpEQXisBVhG6MYcQ0pGJp2XWnSpx8
52o0ogF8c5/ltMlGIlYHo0qQrq9HxHWFvx3RqCoCFzwn4L+tiIVV5Y5MhWc/mlDnATQAgMkynbMb
opoN4z2hUAlPBdpO6FNp+JTtkPVaHE7NYX94K/xqrBT/BvwDIAAAgALQAfT1aWJwtyYea9VEXoAo
RfHGYhTfvRfF48BdYB3YAPgfnOuE39kFlREAAAAASUVORK5CYII=">'></iframe>
</body>
</html>
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