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

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

Patch Set: rebase Created 4 years, 9 months ago

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	1 <!DOCTYPE html>

	2 <script src="../../resources/js-test.js"></script>

	3 <script>

	4 var aCanvas = new OffscreenCanvas(60, 40);

	5

	6 // TransferToImageBitmap on an OffscreenCanvas with no context

	7 shouldThrow("aCanvas.transferToImageBitmap()");

	8 ctx = aCanvas.getContext('2d');

	9

	10 // Verify ImageBitmap is correctly sized

	11 var image = aCanvas.transferToImageBitmap();

	12 shouldBe("image.width", "60");

	13 shouldBe("image.height", "40");

	14

	15 // Verify state is preserved through transferToImageBitmap()

	16 ctx.lineWidth = 5;

	17 aCanvas.transferToImageBitmap();

	18 shouldBe("ctx.lineWidth", "5");

	19

	20 // Verify backing is reset through transferToImageBitmap()

	21 ctx.fillStyle = '#f00';

	22 ctx.fillRect(0, 0, aCanvas.width, aCanvas.height);

	23 var firstImage = aCanvas.transferToImageBitmap();

	24 var secondImage = aCanvas.transferToImageBitmap();

	25 var testCanvas = document.createElement('canvas');

	26 var testCtx = testCanvas.getContext('2d');

	27 testCtx.drawImage(firstImage, 0, 0);

	28 var imgData = testCtx.getImageData(0, 0, 1, 1).data;

	29 shouldBe("imgData[0]", "255");

	30 shouldBe("imgData[1]", "0");

	31 shouldBe("imgData[2]", "0");

	32 shouldBe("imgData[3]", "255");

	33 testCtx.clearRect(0, 0, testCanvas.width, testCanvas.height);

	34 testCtx.drawImage(secondImage, 0, 0);

	35 imgData = testCtx.getImageData(0, 0, 1, 1).data;

	36 shouldBe("imgData[0]", "0");

	37 shouldBe("imgData[1]", "0");

	38 shouldBe("imgData[2]", "0");

	39 shouldBe("imgData[3]", "0");

	40

	41 </script>

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