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86 lines
2.8 KiB
HTML
86 lines
2.8 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<!--
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https://bugzilla.mozilla.org/show_bug.cgi?id=731419
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-->
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<head>
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<title>Test for Bug 731419 - Draw an ostensibly discarded image to a canvas</title>
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<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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</head>
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<body>
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<!--
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Load an image in an iframe, then draw that image to a canvas. Then set the
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iframe to display:none (after bug 731419, this causes the image's decoded
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data to be discarded) and draw the image to a canvas again. We should draw
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the same image data both times.
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-->
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<script>
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SimpleTest.waitForExplicitFinish();
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var data1;
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function drawImage()
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{
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var canvas = document.getElementById('canvas');
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var ctx = canvas.getContext('2d');
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var iframeDoc = document.getElementById('iframe').contentDocument;
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ctx.clearRect(0, 0, canvas.height, canvas.width);
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ctx.drawImage(iframeDoc.getElementById('image'), 0, 0);
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return canvas.toDataURL();
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}
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function iframeLoad()
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{
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data1 = drawImage();
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document.getElementById('iframe').style.display = 'none';
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// Spin the event loop a few times to give the image in the display:none
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// iframe a chance to be discarded.
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SimpleTest.executeSoon(function() {
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SimpleTest.executeSoon(function() {
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SimpleTest.executeSoon(function() {
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step2();
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});
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});
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});
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}
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function step2()
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{
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is(drawImage(), data1, "Same image before and after iframe display:none");
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SimpleTest.finish();
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}
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</script>
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<canvas id='canvas'></canvas>
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<iframe id='iframe' onload='iframeLoad()' src='data:text/html,<img id="image"
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src="data:image/png;base64,
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iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAADRElEQVQ4EQXBTWgcZQCA4ff7ZmZ3
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vvvr4tsjAAAAAmD2RD4GOL34wge21XHsnHWh9/aUjX1pC4C1UpXrP08zN7vMvvujPx3P/PD+0VH3
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a02fkDZDqirF5JVrRA8ewagu8NbADN6az9btMoTqjnasKDTHjp5PSM3I5DQy7UliZbCz7bCwFDD/
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b52h3BCviVHOHv2bvmydyvwOM5MSmch9Ji4/SxMNcaNJTw707zdJmBqeo+G5BuO/V6AzQ5Oo01MI
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KBaTOOis3rPZrKeqrbn2hwXA10fY7zvicqeZKPQ8YpKxJCgIpEQXisBVhG6MYcQ0pGJp2XWnSpx8
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52o0ogF8c5/ltMlGIlYHo0qQrq9HxHWFvx3RqCoCFzwn4L+tiIVV5Y5MhWc/mlDnATQAgMkynbMb
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opoN4z2hUAlPBdpO6FNp+JTtkPVaHE7NYX94K/xqrBT/BvwDIAAAgALQAfT1aWJwtyYea9VEXoAo
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RfHGYhTfvRfF48BdYB3YAPgfnOuE39kFlREAAAAASUVORK5CYII=">'></iframe>
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</body>
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</html>
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