third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-transferToImageBitmap-state-persistency.html - Issue 1995733005: Fix 2D canvas state persistency after OffscreenCanvas.transferToImageBitmap

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Side by Side Diff: third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-transferToImageBitmap-state-persistency.html

Issue 1995733005: Fix 2D canvas state persistency after OffscreenCanvas.transferToImageBitmap (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: fix test Created 4 years, 6 months ago

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	1 <!DOCTYPE html>

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

	3 <script>

	4 var aCanvas = new OffscreenCanvas(50, 50);

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

	6

	7 ctx.rect(0, 0, 25, 50);

	8 ctx.clip();

	9 ctx.translate(20, 20);

	10 // Verify backing is reset through transferToImageBitmap()

	11 ctx.fillStyle = '#0f0';

	12 var firstImage = aCanvas.transferToImageBitmap();

	13 // trasnform should be preserved

	14 ctx.fillRect(0, 0, 10, 10);

	15 var secondImage = aCanvas.transferToImageBitmap();

	16

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

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

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

	20 // Verify that transform was carried over.

	21 var imgData = testCtx.getImageData(23, 25, 1, 1).data;

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

	23 shouldBe("imgData[1]", "255");

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

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

	26 // Verify that clip was carried over.

	27 var imgData = testCtx.getImageData(27, 25, 1, 1).data;

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

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

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

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

	32 </script>

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