LayoutTests/fast/canvas/canvas-createImageBitmap-webgl.html - Issue 766333003: canvas: fix bugs on HTMLCanvasElement::copiedImage()

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Issue 766333003: canvas: fix bugs on HTMLCanvasElement::copiedImage() (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: rephrase this test so that the expectations don't contain failure Created 6 years ago

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1 <html>	1 <html>

2 <head>	2 <head>

3 <script src="../../resources/js-test.js"></script>	3 <script src="../../resources/js-test.js"></script>

4 </head>	4 </head>

5 <body onload="start();">	5 <body onload="start();">

	6 <canvas id="webgl" width="200" height="200"></canvas>

6 <script>	7 <script>

	8 /*

	9 * crbug.com/438986

	10 * window.createImageBitmap(HTMLCanvasElement) copies the back buffer of WebGL.

	11 * So createImageBitmap(HTMLCanvasElement) must create transparent ImageBuffer

	12 * 1 frame after WebGL draws contents.

	13 */

7 window.jsTestIsAsync = true;	14 window.jsTestIsAsync = true;

8	15

9 var canvas = document.createElement("canvas");	16 var canvas = document.createElement("canvas");

10 canvas.width = 200;	17 canvas.width = 200;

11 canvas.height = 200;	18 canvas.height = 200;

12 var ctx = canvas.getContext("2d");	19 var ctx = canvas.getContext("2d");

13 function shouldBeGreen(x, y) {	20 function shouldBeGreen(x, y) {

14 d = ctx.getImageData(x, y, 1, 1).data;	21 d = ctx.getImageData(x, y, 1, 1).data;

15 shouldBeTrue("d[0] == 0");	22 shouldBeTrue("d[0] == 0");

16 shouldBeTrue("d[1] == 255");	23 shouldBeTrue("d[1] == 255");

17 shouldBeTrue("d[2] == 0");	24 shouldBeTrue("d[2] == 0");

18 shouldBeTrue("d[3] == 255");	25 shouldBeTrue("d[3] == 255");

19 }	26 }

20	27

	28 function shouldBeTransparent(x, y) {

	29 d = ctx.getImageData(x, y, 1, 1).data;

	30 shouldBeTrue("d[0] == 0");

	31 shouldBeTrue("d[1] == 0");

	32 shouldBeTrue("d[2] == 0");

	33 shouldBeTrue("d[3] == 0");

	34 }

	35

21 function start() {	36 function start() {

22 var aCanvas = document.createElement("canvas");	37 debug("Check the imageBitmap of webgl.")

23 aCanvas.width = 200;	38 var webgl_canvas = document.getElementById("webgl");

24 aCanvas.height = 200;	39 var gl = webgl_canvas.getContext("webgl", {preserveDrawingBuffer: false} );

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

26 gl.clearColor(0.0, 1.0, 0.0, 1.0);	40 gl.clearColor(0.0, 1.0, 0.0, 1.0);

27 gl.clear(gl.COLOR_BUFFER_BIT);	41 gl.clear(gl.COLOR_BUFFER_BIT);

	42 createImageBitmapAndCheck(webgl_canvas, false).then(function() {

	43 if (window.testRunner) {

	44 testRunner.displayAsyncThen(asyncTest);

	45 } else {

	46 window.requestAnimationFrame(asyncTest);

	47 }

	48 });

	49 }

28	50

29 createImageBitmap(aCanvas).then(function (imageBitmap) {	51 function createImageBitmapAndCheck(webgl_canvas, discarded) {

	52 return createImageBitmap(webgl_canvas).then(function (imageBitmap) {

	53 ctx.clearRect(0, 0, 200, 200);

30 ctx.drawImage(imageBitmap, 0, 0);	54 ctx.drawImage(imageBitmap, 0, 0);

31 shouldBeGreen(50, 50);	55 if (!discarded) {

32 shouldBeGreen(150, 150);	56 shouldBeGreen(50, 50);

33 finishJSTest();	57 shouldBeGreen(150, 150);

	58 } else {

	59 shouldBeTransparent(50, 50);

	60 shouldBeTransparent(150, 150);

	61 }

34 }, function() {	62 }, function() {

35 testFailed("Promise was rejected.");	63 testFailed("Promise was rejected.");

36 finishJSTest();	64 finishJSTest();

37 });	65 });

38 }	66 }

	67

	68 function asyncTest() {

	69 debug("Check the imageBitmap of webgl in the next frame. drawingBuffer i s discarded.")

	70 var webgl_canvas = document.getElementById("webgl");

	71 createImageBitmapAndCheck(webgl_canvas, true).then(function() {

	72 finishJSTest();

	73 });

	74 }

39 </script>	75 </script>

40 </body>	76 </body>

41 </html>	77 </html>

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