third_party/WebKit/LayoutTests/imported/wpt/imagebitmap-renderingcontext/context-creation-with-alpha.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 function consumeImageBitmap(image, alphaVal, expectedR, expectedG, expectedB, ex pectedA)

	18 {

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

	20 dstCanvas.width = width;

	21 dstCanvas.height = height;

	22 var dstCtx;

	23 if (alphaVal == 'true')

	24 dstCtx = dstCanvas.getContext('bitmaprenderer', { alpha: true });

	25 else if (alphaVal == 'false')

	26 dstCtx = dstCanvas.getContext('bitmaprenderer', { alpha: false });

	27 else

	28 dstCtx = dstCanvas.getContext('bitmaprenderer');

	29 dstCtx.transferFromImageBitmap(image);

	30

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

	32 myCanvas.width = width;

	33 myCanvas.height = height;

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

	35 myCtx.drawImage(dstCanvas, 0, 0);

	36 testCanvas(myCtx, expectedR, expectedG, expectedB, expectedA);

	37 }

	38

	39 promise_test(function() {

	40 var srcCanvas = document.createElement('canvas');

	41 srcCanvas.width = width;

	42 srcCanvas.height = height;

	43 var ctx = srcCanvas.getContext('2d');

	44 ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';

	45 ctx.fillRect(0, 0, width, height);

	46 createImageBitmap(srcCanvas).then(function(image) {

	47 consumeImageBitmap(image, 'false', 0, 127, 0, 255);

	48 });

	49 }, "Test that an ImageBitmapRenderingContext with alpha disabled makes the canva s opaque");

	50

	51 promise_test(function() {

	52 var srcCanvas = document.createElement('canvas');

	53 srcCanvas.width = width;

	54 srcCanvas.height = height;

	55 var ctx = srcCanvas.getContext('2d');

	56 ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';

	57 ctx.fillRect(0, 0, width, height);

	58 createImageBitmap(srcCanvas).then(function(image) {

	59 consumeImageBitmap(image, 'true', 0, 255, 0, 127);

	60 });

	61 }, "Test that an ImageBitmapRenderingContext with alpha enabled preserves the al pha");

	62

	63 promise_test(function() {

	64 var srcCanvas = document.createElement('canvas');

	65 srcCanvas.width = width;

	66 srcCanvas.height = height;

	67 var ctx = srcCanvas.getContext('2d');

	68 ctx.fillStyle = 'rgba(0, 255, 0, 0.5)';

	69 ctx.fillRect(0, 0, width, height);

	70 createImageBitmap(srcCanvas).then(function(image) {

	71 consumeImageBitmap(image, '', 0, 255, 0, 127);

	72 });

	73 }, "Test that the 'alpha' context creation attribute is true by default");

	74

	75 </script>

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