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<!DOCTYPE HTML>
<html>
<head>
<title>WebGL in OffscreenCanvas</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
</head>
<body>
<canvas id="c" width="64" height="64"></canvas>
<canvas id="c2" width="64" height="64"></canvas>
<canvas id="c-ref" width="64" height="64"></canvas>
<script>
SimpleTest.waitForExplicitFinish();
function runTest() {
var worker = new Worker("offscreencanvas.js");
ok(worker, "Web worker successfully created");
worker.onmessage = function(evt) {
var msg = evt.data || {};
if (msg.type == "test") {
ok(msg.result, msg.name);
}
if (msg.type == "imagebitmap") {
// testing toBlob
// Fill c-ref with green color.
var c = document.getElementById("c-ref");
var ctx = c.getContext("2d");
ctx.rect(0, 0, 64, 64);
ctx.fillStyle = "#00FF00";
ctx.fill();
var htmlCanvas = document.getElementById("c");
var bitmapRenderer = htmlCanvas.getContext("bitmaprenderer");
bitmapRenderer.transferFromImageBitmap(msg.bitmap);
ok(c.toDataURL() == htmlCanvas.toDataURL(),
"imagebitmap should return a 64x64 green square");
// The ownership of msg.bitmap should be transferred to canvas "c" when
// we called transferFromImageBitmap. So we test if the ownership is actually
// transferred here.
var htmlCanvas = document.getElementById("c2");
var bitmapRenderer = htmlCanvas.getContext("bitmaprenderer");
bitmapRenderer.transferFromImageBitmap(msg.bitmap);
SimpleTest.doesThrow(
function() { c2.toDataURL(); },
"ImageBitmap has been transferred, toDataURL will throw.");
worker.terminate();
SimpleTest.finish();
}
}
worker.postMessage({test: 'webgl_imagebitmap'});
}
SpecialPowers.pushPrefEnv({'set': [
['gfx.offscreencanvas.enabled', true],
['webgl.force-enabled', true],
]}, runTest);
</script>
</body>
</html>
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