third_party/WebKit/LayoutTests/fast/canvas/canvas-ImageBitmap-transferable.html - Issue 1423513005: Reland of: Make Imagebitmap Transferable

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Issue 1423513005: Reland of: Make Imagebitmap Transferable (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: fix vector pre-allocation issue Created 5 years, 1 month ago

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	1 <!DOCTYPE html>

	2 <html>

	3 <body>

	4 <canvas id="canvas" width="3" height="2"></canvas>

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

	6 <script>

	7 jsTestIsAsync = true;

	8 var worker = new Worker('./resources/canvas-ImageBitmap-transferable.js');

	9

	10 description("Tests that ImageBitmap is transferable and that the pixel data surv ives the trip, as well as createImageBitmap(ImageBitmap) works on worker thread" );

	11

	12 var imageWidth = 3;

	13 var imageHeight = 2;

	14 var bitmapWidth;

	15 var bitmapHeight;

	16 var newImage;

	17 var newImageBitmap;

	18 var image = new ImageData(new Uint8ClampedArray(

	19 [255, 0, 0, 255,

	20 0, 255, 0, 255,

	21 255, 255, 255, 127,

	22 0, 0, 0, 64,

	23 12, 34, 56, 64,

	24 12, 34, 56, 127]),

	25 imageWidth, imageHeight);

	26 var context = document.getElementById("canvas").getContext("2d");

	27

	28 createImageBitmap(image).then(imageBitmap => {

	29 bitmapWidth = imageBitmap.width;

	30 bitmapHeight = imageBitmap.height;

	31 shouldBe("bitmapWidth", "imageWidth");

	32 shouldBe("bitmapHeight", "imageHeight");

	33

	34 worker.postMessage({data: imageBitmap}, [imageBitmap]);

	35

	36 // ImageBitmap has been transfered to worker, main thread loses ownership

	37 // of it, so the width and height should be 0 now.

	38 bitmapWidth = imageBitmap.width;

	39 bitmapHeight = imageBitmap.height;

	40 shouldBe("bitmapWidth", "0");

	41 shouldBe("bitmapHeight", "0");

	42 });

	43

	44 worker.onmessage = function(e) {

	45 newImageBitmap = e.data.data;

	46 bitmapWidth = newImageBitmap.width;

	47 bitmapHeight = newImageBitmap.height;

	48

	49 // Getting the ImageBitmap back from the worker thread

	50 shouldBe("bitmapWidth", "imageWidth");

	51 shouldBe("bitmapHeight", "imageHeight");

	52

	53 context.drawImage(newImageBitmap, 0, 0);

	54 newImage = context.getImageData(0, 0, imageWidth, imageHeight);

	55

	56 // newImage is not necessary the same as imageData because of

	57 // multiplying and dividing by alpha during the round trip, but

	58 // they should be close.

	59 // The alpha channel should be exactly the same.

	60 shouldBeCloseTo("newImage.data[0]", "image.data[0]", 5);

	61 shouldBeCloseTo("newImage.data[1]", "image.data[1]", 5);

	62 shouldBeCloseTo("newImage.data[2]", "image.data[2]", 5);

	63 shouldBe("newImage.data[3]", "image.data[3]");

	64

	65 shouldBeCloseTo("newImage.data[4]", "image.data[4]", 5);

	66 shouldBeCloseTo("newImage.data[5]", "image.data[5]", 5);

	67 shouldBeCloseTo("newImage.data[6]", "image.data[6]", 5);

	68 shouldBe("newImage.data[7]", "image.data[7]");

	69

	70 shouldBeCloseTo("newImage.data[8]", "image.data[8]", 5);

	71 shouldBeCloseTo("newImage.data[9]", "image.data[9]", 5);

	72 shouldBeCloseTo("newImage.data[10]", "image.data[10]", 5);

	73 shouldBe("newImage.data[11]", "image.data[11]");

	74

	75 shouldBeCloseTo("newImage.data[12]", "image.data[12]", 5);

	76 shouldBeCloseTo("newImage.data[13]", "image.data[13]", 5);

	77 shouldBeCloseTo("newImage.data[14]", "image.data[14]", 5);

	78 shouldBe("newImage.data[15]", "image.data[15]");

	79

	80 shouldBeCloseTo("newImage.data[16]", "image.data[16]", 5);

	81 shouldBeCloseTo("newImage.data[17]", "image.data[17]", 5);

	82 shouldBeCloseTo("newImage.data[18]", "image.data[18]", 5);

	83 shouldBe("newImage.data[19]", "image.data[19]");

	84

	85 shouldBeCloseTo("newImage.data[20]", "image.data[20]", 5);

	86 shouldBeCloseTo("newImage.data[21]", "image.data[21]", 5);

	87 shouldBeCloseTo("newImage.data[22]", "image.data[22]", 5);

	88 shouldBe("newImage.data[23]", "image.data[23]");

	89 finishJSTest();

	90 }

	91

	92 </script>

	93 </body>

	94 </html>

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