gecko-dev/layout/base/tests/test_bug469170.html

50 lines
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HTML

<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=469170
-->
<head>
<title>Test for Bug 469170</title>
<script type="application/javascript" src="/MochiKit/packed.js"></script>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<p><a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=469170">Mozilla Bug 469170</a></p>
<iframe id="source" width="50" height="50"
src="data:text/html,%3Chtml%3E%3C%2Fhtml%3E"></iframe>
<canvas id="scratch" width="50" height="50"></canvas>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 469170 **/
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
var canvas = document.getElementById('scratch');
var source = document.getElementById('source').contentWindow;
var context = canvas.getContext("2d");
context.clearRect(0, 0, canvas.width, canvas.height);
context.drawWindow(source, 0, 0, source.innerWidth, source.innerHeight,
"transparent");
var components = [ "red", "green", "blue", "alpha" ];
var data = context.getImageData(0, 0, canvas.width, canvas.height).data;
var failed = false;
for (var i = 0; i < data.length; i++) {
if (data[i] != 0) {
is(data[i], 0, "pixel " + Math.floor(i/4) + " " + components[i%4]);
failed = true;
}
}
if (!failed) {
ok(!failed, "all pixels fully transparent");
}
</script>
</pre>
</body>
</html>