third_party/WebKit/LayoutTests/fast/canvas/canvas-ImageBitmap-transferable.html - Issue 1413723004: Revert of Make ImageBitmap Transferable

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Issue 1413723004: Revert of Make ImageBitmap Transferable (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: 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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