| Juanmi Huertas | 209c15c | 2019-05-31 21:26:25 | [diff] [blame] | 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 testImageBitmap(image, opts, expectedR, expectedG, expectedB, expectedA) |
| 12 | { |
| 13 | var dstCanvas = new OffscreenCanvas(width,height); |
| 14 | var dstCtx = dstCanvas.getContext('bitmaprenderer', opts); |
| 15 | dstCtx.transferFromImageBitmap(image); |
| 16 | |
| 17 | var myCanvas = document.createElement('canvas'); |
| 18 | myCanvas.width = width; |
| 19 | myCanvas.height = height; |
| 20 | var myCtx = myCanvas.getContext('2d'); |
| 21 | myCtx.drawImage(dstCanvas, 0, 0); |
| 22 | var color = myCtx.getImageData(5, 5, 1, 1).data; |
| 23 | assert_array_approx_equals(color, [expectedR, expectedG, expectedB, expectedA],1); |
| 24 | } |
| 25 | |
| 26 | promise_test(function() { |
| 27 | var srcCanvas = document.createElement('canvas'); |
| 28 | srcCanvas.width = width; |
| 29 | srcCanvas.height = height; |
| 30 | var ctx = srcCanvas.getContext('2d'); |
| 31 | ctx.fillStyle = 'rgba(0, 255, 0, 0.5)'; |
| 32 | ctx.fillRect(0, 0, width, height); |
| 33 | return createImageBitmap(srcCanvas).then(function(image) { |
| 34 | testImageBitmap(image, {alpha: false}, 0, 255, 0, 128); |
| 35 | }); |
| 36 | }, "Test that an ImageBitmapRenderingContext with alpha disabled makes the canvas opaque"); |
| 37 | |
| 38 | promise_test(function() { |
| 39 | var srcCanvas = document.createElement('canvas'); |
| 40 | srcCanvas.width = width; |
| 41 | srcCanvas.height = height; |
| 42 | var ctx = srcCanvas.getContext('2d'); |
| 43 | ctx.fillStyle = 'rgba(0, 255, 0, 0.5)'; |
| 44 | ctx.fillRect(0, 0, width, height); |
| 45 | return createImageBitmap(srcCanvas).then(function(image) { |
| 46 | testImageBitmap(image, {alpha: true}, 0, 255, 0, 128); |
| 47 | }); |
| 48 | }, "Test that an ImageBitmapRenderingContext with alpha enabled preserves the alpha"); |
| 49 | |
| 50 | promise_test(function() { |
| 51 | var srcCanvas = document.createElement('canvas'); |
| 52 | srcCanvas.width = width; |
| 53 | srcCanvas.height = height; |
| 54 | var ctx = srcCanvas.getContext('2d'); |
| 55 | ctx.fillStyle = 'rgba(0, 255, 0, 0.5)'; |
| 56 | ctx.fillRect(0, 0, width, height); |
| 57 | return createImageBitmap(srcCanvas).then(function(image) { |
| 58 | testImageBitmap(image, {}, 0, 255, 0, 128); |
| 59 | }); |
| 60 | }, "Test that the 'alpha' context creation attribute is true by default"); |
| 61 | |
| 62 | </script> |
