| xidachen | 9bf9877 | 2016-11-10 20:27:01 | [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 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, expectedA) |
| 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); |
| xidachen | 47e0eb9 | 2016-11-14 19:43:11 | [diff] [blame] | 46 | return createImageBitmap(srcCanvas).then(function(image) { |
| xidachen | 9bf9877 | 2016-11-10 20:27:01 | [diff] [blame] | 47 | consumeImageBitmap(image, 'false', 0, 127, 0, 255); |
| 48 | }); |
| 49 | }, "Test that an ImageBitmapRenderingContext with alpha disabled makes the canvas 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); |
| xidachen | 47e0eb9 | 2016-11-14 19:43:11 | [diff] [blame] | 58 | return createImageBitmap(srcCanvas).then(function(image) { |
| xidachen | 9bf9877 | 2016-11-10 20:27:01 | [diff] [blame] | 59 | consumeImageBitmap(image, 'true', 0, 255, 0, 127); |
| 60 | }); |
| 61 | }, "Test that an ImageBitmapRenderingContext with alpha enabled preserves the alpha"); |
| 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); |
| xidachen | 47e0eb9 | 2016-11-14 19:43:11 | [diff] [blame] | 70 | return createImageBitmap(srcCanvas).then(function(image) { |
| xidachen | 9bf9877 | 2016-11-10 20:27:01 | [diff] [blame] | 71 | consumeImageBitmap(image, '', 0, 255, 0, 127); |
| 72 | }); |
| 73 | }, "Test that the 'alpha' context creation attribute is true by default"); |
| 74 | |
| 75 | </script> |
