mozilla-central/layout/base/tests/test_bug514127.html

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Test Info:

<!DOCTYPE HTML>
<html>
<!--
-->
<head>
<title>Test for Bug 514127</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body onload="runTest();">
<p><a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=514127">Mozilla Bug 514127</a></p>
<!--
iframe source is
<html><body style='background: rgb(0,0,255); width: 100px; height: 50100px;'></body></html>
-->
<iframe id="source" width="50" height="50"
src="data:text/html,%3Chtml%3E%3Cbody%20style%3D%27background%3A%20rgb%280%2C0%2C255%29%3B%20width%3A%20100px%3B%20height%3A%2050100px%3B%27%3E%3C%2Fbody%3E%3C%2Fhtml%3E"></iframe>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 514127 **/
SimpleTest.waitForExplicitFinish();
function runTest() {
var source = document.getElementById('source').contentWindow;
var canvasWidth = 50;
var canvasHeight = 50;
rect = { left: 25, top: 50000,
width: canvasWidth, height: canvasHeight };
var canvas = SpecialPowers.snapshotRect(source, rect, "transparent");
var context = canvas.getContext("2d");
var data = context.getImageData(0, 0, canvasWidth, canvasHeight).data;
var failed = false;
for (var i = 0; i < data.length; i+=4) {
if (data[i] != 0 || data[i+1] != 0 || data[i+2] != 255 || data[i+3] != 255) {
failed = true;
break;
}
}
ok(!failed, "all pixels blue");
SimpleTest.finish();
}
</script>
</pre>
</body>
</html>