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<!DOCTYPE HTML>
<html>
<head>
<title>WebGL in OffscreenCanvas</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="offscreencanvas.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
</head>
<body>
<canvas id="c" width="64" height="64"></canvas>
<canvas id="c-mt" width="64" height="64"></canvas>
<canvas id="c-ref" width="64" height="64"></canvas>
<script>
SimpleTest.waitForExplicitFinish();
function testBlob(blob, callback) {
// 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 reader = new FileReader();
reader.onload = function(e) {
ok(c.toDataURL() == e.target.result, "toBlob should return a 64x64 green square");
callback();
};
reader.readAsDataURL(blob);
}
function runTestOnMainThread() {
var htmlCanvas = document.getElementById("c-mt");
ok(htmlCanvas, "Should have HTML canvas element");
window.onmessage = function(evt) {
var msg = evt.data || {};
if (msg.type == "test") {
ok(msg.result, msg.name);
}
if (msg.type == "blob") {
testBlob(msg.blob, SimpleTest.finish);
}
}
ok(htmlCanvas.transferControlToOffscreen, "HTMLCanvasElement has transferControlToOffscreen function");
var offscreenCanvas = htmlCanvas.transferControlToOffscreen();
ok(offscreenCanvas, "Expected transferControlToOffscreen to succeed");
entryFunction('webgl_toblob', '', offscreenCanvas);
}
function runTest() {
var htmlCanvas = document.getElementById("c");
var worker = new Worker("offscreencanvas.js");
ok(htmlCanvas, "Should have HTML canvas element");
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 == "blob") {
testBlob(msg.blob, function() {
worker.terminate();
runTestOnMainThread();
});
}
}
ok(htmlCanvas.transferControlToOffscreen, "HTMLCanvasElement has transferControlToOffscreen function");
var offscreenCanvas = htmlCanvas.transferControlToOffscreen();
ok(offscreenCanvas, "Expected transferControlToOffscreen to succeed");
worker.postMessage({test: 'webgl_toblob', canvas: offscreenCanvas}, [offscreenCanvas]);
}
SpecialPowers.pushPrefEnv({'set': [
['webgl.force-enabled', true],
]}, runTest);
</script>
</body>
</html>
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