third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-clearRect-in-worker.html - Issue 1775153002: Make OffscreenCanvasRenderingContext2D renderable on a worker

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Side by Side Diff: third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-clearRect-in-worker.html

Issue 1775153002: Make OffscreenCanvasRenderingContext2D renderable on a worker (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Fixes and tests for transferToImageBitmap Created 4 years, 9 months ago

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	1 <!DOCTYPE html>

	2 <html>

	3 <body>

	4 <canvas id='output' width='100' height='100'></canvas>

	5

	6 <script id="myWorker" type="text/worker">
	Stephen White 2016/03/09 18:54:07 uNit: use ' or " for attribute values, not both (E uNit: use ' or " for attribute values, not both (Emerson's hobgoblin)
	7 self.onmessage = function(e) {

	8 var aCanvas = new OffscreenCanvas(100, 100);

	9 var ctx = aCanvas.getContext('2d');

	10 ctx.fillStyle = 'green';

	11 ctx.fillRect(20, 20, 60, 60);

	12 ctx.fillStyle = 'red';

	13 ctx.fillRect(25, 25, 50, 50);

	14 // No red should be visible after this

	15 ctx.clearRect(25, 25, 50, 50);

	16 var image = aCanvas.transferToImageBitmap();

	17 self.postMessage(image, [image]);

	18 };

	19 </script>

	20

	21 <script>

	22 if (window.testRunner) {

	23 testRunner.waitUntilDone();

	24 }

	25 var blob = new Blob([document.getElementById('myWorker').textContent]);

	26 var worker = new Worker(URL.createObjectURL(blob));

	27 worker.addEventListener('message', msg => {

	28 var outputCtx = document.getElementById('output').getContext('imagebitmap');

	29 outputCtx.transferImageBitmap(msg.data);

	30 if (window.testRunner) {

	31 testRunner.notifyDone();

	32 }

	33 });

	34 worker.postMessage("");

	35 </script>

	36 </body>

	37 </html>

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