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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
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dom/canvas/test/test_drawImageIncomplete.html Normal file
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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=517056
-->
<head>
<title>Test for Bug 517056</title>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=517056">Mozilla Bug 517056</a>
<p id="display">
<canvas id="c" width="1" height="1"></canvas>
</p>
<div id="content" style="display: none">
</div>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 517056 **/
var ctx = $("c").getContext('2d');
ctx.fillStyle = "black";
ctx.fillRect(0, 0, 1, 1);
var data = ctx.getImageData(0, 0, 1, 1).data;
is(data[0], 0, "Red channel of black should be 0");
is(data[1], 0, "Green channel of black should be 0");
is(data[2], 0, "Blue channel of black should be 0")
is(data[3], 255, "Alpha channel of black should be opaque");
var img = new Image();
// Force a new URI every time, so that we don't run into stupid caching issues.
img.src = "image_green-1x1.png?" + (new Date + 0) + Math.random();
// This shouldn't throw
ctx.drawImage(img, 0, 0);
var data = ctx.getImageData(0, 0, 1, 1).data;
is(data[0], 0, "Red channel of black should be 0 and image should have been ignored");
is(data[1], 0, "Green channel of black should be 0 and image should have been ignored");
is(data[2], 0, "Blue channel of black should be 0 and image should have been ignored")
is(data[3], 255, "Alpha channel of black should be opaque and image should have been ignored");
SimpleTest.waitForExplicitFinish();
img.onload = function() {
ctx.drawImage(img, 0, 0);
var data = ctx.getImageData(0, 0, 1, 1).data;
is(data[0], 0, "Red channel of green should be 0");
is(data[1], 255, "Green channel of green should be 255");
is(data[2], 0, "Blue channel of green should be 0")
is(data[3], 255, "Alpha channel of green should be opaque");
SimpleTest.finish();
}
</script>
</pre>
</body>
</html>