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<!DOCTYPE html>
<html>
<head>
<script src="../../resources/js-test.js"></script>
</head>
<body>
<script>
if (window.testRunner) {
testRunner.dumpAsText();
testRunner.waitUntilDone();
}
var barrier = 2;
function frameLoaded()
{
barrier--;
if (barrier == 0)
runTest();
}
function runTest()
{
debug("check if re-parenting canvas keeps its context.")
canvasTest(document.getElementById("frame1"), true);
debug("check if detaching canvas loses its context.")
canvasTest(document.getElementById("frame2"), false);
if (window.testRunner)
testRunner.notifyDone();
}
var data;
function canvasTest(frame, adoptCanvas)
{
var parent = document.getElementById("parent");
var canvas = frame.contentDocument.getElementById('mycanvas');
var ctx = canvas.getContext('2d');
var imageData;
imageData = ctx.getImageData(100, 100, 1, 1);
data = imageData.data;
shouldBe('data[0]', '255');
shouldBe('data[1]', '0');
shouldBe('data[2]', '0');
if (adoptCanvas)
parent.appendChild(canvas);
parent.removeChild(frame);
imageData = ctx.getImageData(100, 100, 1, 1);
data = imageData.data;
if (adoptCanvas) {
shouldBe('data[0]', '255');
} else {
// GC causes active DOM stop and canvas loses its context.
shouldBe('data[0]', '0');
}
shouldBe('data[1]', '0');
shouldBe('data[2]', '0');
}
</script>
<div id="parent">
<iframe id="frame1" src="resources/canvas-fill-for-iframe.html" onload="frameLoaded()"></iframe>
<iframe id="frame2" src="resources/canvas-fill-for-iframe.html" onload="frameLoaded()"></iframe>
</div>
</body>
</html>
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