third_party/WebKit/LayoutTests/imported/wpt/imagebitmap-renderingcontext/tranferFromImageBitmap-null.html - Issue 2495873002: Manually import wpt@359815a0ff565cb6ca89349f6e9e154789267d8b

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Issue 2495873002: Manually import wpt@359815a0ff565cb6ca89349f6e9e154789267d8b (Closed)

Patch Set: Add Crash/Timeout expectation for bitmaprenderer-as-imagesource.html Created 4 years, 1 month ago

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	1 <!DOCTYPE html>

	2 <meta charset="utf-8">

	3 <title>Canvas's ImageBitmapRenderingContext test</title>

	4 <script src="/resources/testharness.js"></script>

	5 <script src="/resources/testharnessreport.js"></script>

	6 <link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the -imagebitmap-rendering-context">

	7 <script>

	8 var width = 10;

	9 var height = 10;

	10

	11 function testCanvas(ctx, r, g, b, a)

	12 {

	13 var color = ctx.getImageData(5, 5, 1, 1).data;

	14 assert_array_equals(color, [r, g, b, a]);

	15 }

	16

	17 promise_test(function() {

	18 function testTransferFromImageBitmapNullability(greenImage, redImage) {

	19 var bitmapCanvas = document.createElement('canvas');

	20 bitmapCanvas.width = width;

	21 bitmapCanvas.height = height;

	22 var bitmapCtx = bitmapCanvas.getContext('bitmaprenderer');

	23 bitmapCtx.transferFromImageBitmap(greenImage);

	24

	25 // Make sure the bitmap renderer canvas is filled correctly.

	26 var myCanvas = document.createElement('canvas');

	27 myCanvas.width = width;

	28 myCanvas.height = height;

	29 var myCtx = myCanvas.getContext('2d');

	30 myCtx.drawImage(bitmapCanvas, 0, 0);

	31 testCanvas(myCtx, 0, 255, 0, 255);

	32

	33 // Test if passing null resets the bitmap renderer canvas.

	34 // Drawing the resetted canvas cannot change the destination canvas.

	35 bitmapCtx.transferFromImageBitmap(null);

	36 var myCanvas2 = document.createElement('canvas');

	37 myCanvas2.width = width;

	38 myCanvas2.height = height;

	39 var myCtx2 = myCanvas2.getContext('2d');

	40 myCtx2.drawImage(bitmapCanvas, 0, 0);

	41 testCanvas(myCtx2, 0, 0, 0, 0);

	42

	43 // Test if we can redraw the bitmap canvas correctly after reset.

	44 bitmapCtx.transferFromImageBitmap(redImage);

	45 var myCanvas3 = document.createElement('canvas');

	46 myCanvas3.width = width;

	47 myCanvas3.height = height;

	48 var myCtx3 = myCanvas3.getContext('2d');

	49 myCtx3.drawImage(bitmapCanvas, 0, 0);

	50 testCanvas(myCtx3, 255, 0, 0, 255);

	51 }

	52

	53 var greenCanvas = document.createElement('canvas');

	54 greenCanvas.width = width;

	55 greenCanvas.height = height;

	56 var greenCtx = greenCanvas.getContext('2d');

	57 greenCtx.fillStyle = '#0f0';

	58 greenCtx.fillRect(0, 0, width, height);

	59

	60 var redCanvas = document.createElement('canvas');

	61 redCanvas.width = width;

	62 redCanvas.height = height;

	63 var redCtx = redCanvas.getContext('2d');

	64 redCtx.fillStyle = '#f00';

	65 redCtx.fillRect(0, 0, width, height);

	66

	67 return Promise.all([

	68 createImageBitmap(greenCanvas),

	69 createImageBitmap(redCanvas),

	70 ]).then(([greenImage, redImage]) => {

	71 testTransferFromImageBitmapNullability(greenImage, redImage);

	72 });

	73 },'Test that transferFromImageBitmap(null) discards the previously transferred i mage');

	74

	75 </script>

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