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<!DOCTYPE HTML>
<html>
<head>
<title>WebGL in OffscreenCanvas</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/WindowSnapshot.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
</head>
<body>
<script type="text/js-worker">
function ok(expect, msg) {
postMessage({"type": "status", status: !!expect, msg: msg});
}
onmessage = function(event) {
var bitmap = event.data.bitmap;
ok(!!bitmap, "Get the ImageBitmap from the main script.");
bitmap.close();
ok(bitmap.width == 0 && bitmap.height == 0, "After close(), width and height should return 0");
postMessage({"type": "finish"});
}
</script>
<script>
SimpleTest.waitForExplicitFinish();
function createCanvas() {
var htmlCanvas = document.createElement('canvas');
htmlCanvas.width = 64;
htmlCanvas.height = 64;
document.body.appendChild(htmlCanvas);
return htmlCanvas;
}
function runTest() {
var canvas1 = createCanvas();
var ctx = canvas1.getContext("2d");
ctx.fillStyle = "#00FF00";
ctx.fillRect(0, 0, 64, 64);
var canvasRef = createCanvas();
var ctx = canvasRef.getContext("2d");
ctx.fillStyle = "#00FF00";
ctx.fillRect(0, 0, 64, 64);
createImageBitmap(canvas1).then(function(bmp) {
var canvas2 = createCanvas();
var ctx2 = canvas2.getContext("2d");
ctx2.drawImage(bmp, 0, 0);
ok(canvasRef.toDataURL() == canvas2.toDataURL(), "toDataURL should return same result.");
document.body.removeChild(canvas2);
bmp.close();
ok(bmp.width == 0 && bmp.height == 0, "After close(), width and height should return 0");
var canvas2 = createCanvas();
var ctx2 = canvas2.getContext("2d");
var beforeDrawImageDataURL = canvas2.toDataURL();
ctx2.drawImage(bmp, 0, 0);
var afterDrawImageDataURL = canvas2.toDataURL();
ok(beforeDrawImageDataURL == afterDrawImageDataURL,
"Drawing operations with a closed ImageBitmap should do nothing.");
runTestOnWorker();
});
}
function runTestOnWorker() {
var canvas1 = createCanvas();
var ctx = canvas1.getContext("2d");
ctx.fillStyle = "#00FF00";
ctx.fillRect(0, 0, 64, 64);
var blob = new Blob(Array.prototype.map.call(document.querySelectorAll("script[type=\"text\/js-worker\"]"), function (oScript) { return oScript.textContent; }),{type: "text/javascript"});
var worker = new Worker(window.URL.createObjectURL(blob));
createImageBitmap(canvas1).then(function(bmp) {
worker.postMessage({bitmap: bmp}, [bmp]);
worker.onmessage = function(event) {
if (event.data.type == "status") {
ok(event.data.status, event.data.msg);
} else if (event.data.type == "finish") {
SimpleTest.finish();
}
}
});
}
runTest();
</script>
</body>
</html>
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