third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-getContext2D.html - Issue 1748163003: Add rendering context and rendering 2D context to OffscreenCanvas

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Issue 1748163003: Add rendering context and rendering 2D context to OffscreenCanvas (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Make OffscreenCanvasRenderingContext Modules exportable" Created 4 years, 9 months ago

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	1 <!DOCTYPE html>

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

	3 <script>

	4 description("Tests basic functionalities of offscreenCanvas.getContext on the ma in thread");

	5

	6 // Tests onstructor of OffscreenCanvas and length/width change

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

	8 shouldBe("aCanvas.width", "40");

	9 shouldBe("aCanvas.height", "60");

	10

	11 aCanvas.width = 110;

	12 aCanvas.height = 90;

	13 shouldBe("aCanvas.width", "110");

	14 shouldBe("aCanvas.height", "90");

	15

	16 aCanvas.width = 0; // Zero dimension is allowed

	17 shouldBe("aCanvas.width", "0");

	18

	19 // Tests object type of getContext('2d')

	20 var ctx;

	21 shouldNotThrow("ctx = aCanvas.getContext('2d')");

	22 shouldBeType("ctx", "OffscreenCanvasRenderingContext2D");

	23

	24 // Calling getContext on a different context type will return null

	25 var ctx2 = aCanvas.getContext("webgl");

	26 shouldBeNull("ctx2");

	27

	28 // Calling getContext on the same context type will return the original context type

	29 var ctx3 = aCanvas.getContext("2d");

	30 shouldBeNonNull("ctx3");

	31 shouldBeTrue("ctx3 == ctx");

	32

	33 // TODO: change the below part of the test when webgl is supported.

	34 // Calling getContext on an unimplemented context type will return null

	35 var bogusCanvas = new OffscreenCanvas(20, 20);

	36 var bogusCtx = bogusCanvas.getContext("webgl");

	37 shouldBeNull("bogusCtx");

	38 </script>

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