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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transferrable.w.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>
<script id="myWorker" type="text/worker">
function isInvalidStateError(funcStr, offscreenCanvas)
{
try {
eval(funcStr);
} catch (e) {
if (e instanceof DOMException && e.name == "InvalidStateError")
return true;
return false;
}
}
function testExceptionWith2DContext()
{
var offscreenCanvas = new OffscreenCanvas(10, 10);
var ctx = offscreenCanvas.getContext('2d');
return isInvalidStateError("self.postMessage(offscreenCanvas, [offscreenCanvas])", offscreenCanvas);
}
function testExceptionWithWebGLContext()
{
var offscreenCanvas = new OffscreenCanvas(10, 10);
var ctx = offscreenCanvas.getContext('webgl');
return isInvalidStateError("self.postMessage(offscreenCanvas, [offscreenCanvas])", offscreenCanvas);
}
function testExceptionWithDetachedOffscreenCanvas1()
{
var offscreenCanvas = new OffscreenCanvas(10, 10);
self.postMessage(offscreenCanvas, [offscreenCanvas]);
return isInvalidStateError("self.postMessage(offscreenCanvas, [offscreenCanvas])", offscreenCanvas);
}
function testExceptionWithDetachedOffscreenCanvas2()
{
var offscreenCanvas = new OffscreenCanvas(10, 10);
self.postMessage(offscreenCanvas, [offscreenCanvas]);
return isInvalidStateError("offscreenCanvas.getContext('2d')", offscreenCanvas);
}
function testExceptionWithDetachedOffscreenCanvas3()
{
var offscreenCanvas = new OffscreenCanvas(10, 10);
self.postMessage(offscreenCanvas, [offscreenCanvas]);
return isInvalidStateError("offscreenCanvas.getContext('webgl')", offscreenCanvas);
}
self.onmessage = function(e) {
switch(e.data) {
case 'test1':
var offscreenCanvas = new OffscreenCanvas(10, 10);
self.postMessage(offscreenCanvas, [offscreenCanvas]);
break;
case 'test2':
self.postMessage(testExceptionWith2DContext());
break;
case 'test3':
self.postMessage(testExceptionWithWebGLContext());
break;
case 'test4':
self.postMessage(testExceptionWithDetachedOffscreenCanvas1());
break;
case 'test5':
self.postMessage(testExceptionWithDetachedOffscreenCanvas2());
break;
case 'test6':
self.postMessage(testExceptionWithDetachedOffscreenCanvas3());
break;
}
};
</script>
<script>
function makeWorker(test) {
var blob = new Blob([document.getElementById("myWorker").textContent]);
var worker = new Worker(URL.createObjectURL(blob));
worker.onerror = test.unreached_func("error");
return worker;
}
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
assert_equals(msg.data.width, 10);
assert_equals(msg.data.height, 10);
}));
worker.postMessage('test1');
}, "Test that OffscreenCanvas's size is correct after being transferred from a worker.");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
assert_true(msg.data);
}));
worker.postMessage('test2');
}, "Test that transfer an OffscreenCanvas that has a 2d context throws exception in a worker.");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
assert_true(msg.data);
}));
worker.postMessage('test3');
}, "Test that transfer an OffscreenCanvas that has a webgl context throws exception in a worker.");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
if (msg.data == true || msg.data == false)
assert_true(msg.data);
}));
worker.postMessage('test4');
}, "Test that transfer an OffscreenCanvas twice throws exception in a worker.");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
if (msg.data == true || msg.data == false)
assert_true(msg.data);
}));
worker.postMessage('test5');
}, "Test that calling getContext('2d') on a detached OffscreenCanvas throws exception in a worker.");
async_test(function(t) {
var worker = makeWorker(t);
worker.addEventListener('message', t.step_func_done(function(msg) {
if (msg.data == true || msg.data == false)
assert_true(msg.data);
}));
worker.postMessage('test6');
}, "Test that calling getContext('webgl') on a detached OffscreenCanvas throws exception in a worker.");
</script>