mirror of
https://github.com/servo/servo.git
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79 lines
2.4 KiB
HTML
79 lines
2.4 KiB
HTML
<!DOCTYPE html>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/common/canvas-tests.js"></script>
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<link rel="help" href="https://html.spec.whatwg.org/#offscreencontext2d-commit">
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<script id="myWorker" type="text/worker">
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function testCommitPushesContents(offscreenCanvas) {
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try {
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var ctx = offscreenCanvas.getContext('2d');
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ctx.fillStyle = "#0f0";
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ctx.fillRect(0, 0, 10, 10);
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ctx.commit();
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return true;
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} catch(e) {
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return false;
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}
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}
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function testCommitException() {
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var offscreenCanvas = new OffscreenCanvas(10, 10);
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var ctx = offscreenCanvas.getContext('2d');
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ctx.fillStyle = "#0f0";
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ctx.fillRect(0, 0, 10, 10);
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return true;
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}
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self.onmessage = function(e) {
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switch (e.data.msg) {
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case 'test1':
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self.postMessage(testCommitPushesContents(e.data.data));
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break;
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case 'test2':
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self.postMessage(testCommitException());
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break;
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}
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};
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</script>
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<script>
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function verifyPlaceholder(placeholder) {
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var canvas = document.createElement('canvas');
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canvas.width = canvas.height = 10;
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var ctx = canvas.getContext('2d');
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ctx.drawImage(placeholder, 0, 0);
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_assertPixel(canvas, 5,5, 0,255,0,255, "5,5", "0,255,0,255");
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}
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function makeWorker(test) {
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var blob = new Blob([document.getElementById("myWorker").textContent]);
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var worker = new Worker(URL.createObjectURL(blob));
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worker.onerror = test.unreached_func("error");
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return worker;
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}
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async_test(function(t) {
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var placeholder = document.createElement('canvas');
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placeholder.width = placeholder.height = 10;
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var offscreenCanvas = placeholder.transferControlToOffscreen();
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var worker = makeWorker(t);
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worker.addEventListener('message', t.step_func_done(function(msg) {
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assert_true(msg.data);
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verifyPlaceholder(placeholder);
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}));
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worker.postMessage({msg: 'test1', data: offscreenCanvas}, [offscreenCanvas]);
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}, "Test that calling OffscreenCanvas's commit pushes its contents to its placeholder.");
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async_test(function(t) {
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var worker = makeWorker(t);
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worker.addEventListener('message', t.step_func_done(function(msg) {
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assert_true(msg.data);
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}));
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worker.postMessage({msg: 'test2'});
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}, "Test that calling commit on an OffscreenCanvas that is not transferred from a HTMLCanvasElement throws an exception in a worker.");
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</script>
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