| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>Canvas's ImageBitmapRenderingContext test</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#the-imagebitmap-rendering-context"> |
| <script> |
| var width = 10; |
| var height = 10; |
| |
| function testCanvas(ctx, x, y, r, g, b, a) |
| { |
| var color = ctx.getImageData(x, y, 1, 1).data; |
| assert_array_equals(color, [r, g, b, a]); |
| } |
| |
| function consumeImageBitmap(image, t) |
| { |
| var myCanvas = document.createElement('canvas'); |
| myCanvas.width = myCanvas.height = 20; |
| var myCtx = myCanvas.getContext('bitmaprenderer'); |
| myCtx.transferFromImageBitmap(image); |
| |
| createImageBitmap(myCanvas).then(t.step_func_done(function(imageBitmap) { |
| // Per spec, when transferFromImageBitmap happens, the transferred |
| // ImageBitmap (|image| here) must determine the intrinsic size of |
| // myCanvas, and hence myCanvas.width/height is ignored. Therefore, |
| // |imageBitmap| should have the same size as the |image|. |
| assert_equals(imageBitmap.width, width); |
| assert_equals(imageBitmap.height, height); |
| |
| var dstCanvas = document.createElement('canvas'); |
| dstCanvas.width = dstCanvas.height = 20; |
| var dstCtx = dstCanvas.getContext('2d'); |
| dstCtx.drawImage(myCanvas, 0, 0); |
| testCanvas(dstCtx, 5, 5, 0, 255, 0, 255); |
| testCanvas(dstCtx, 15, 15, 0, 0, 0, 0); |
| })); |
| } |
| |
| async_test(function(t) { |
| var canvas = document.createElement("canvas"); |
| canvas.width = width; |
| canvas.height = height; |
| var ctx = canvas.getContext('2d'); |
| ctx.fillStyle = '#0f0'; |
| ctx.fillRect(0, 0, width, height); |
| createImageBitmap(canvas).then(t.step_func(function(image) { |
| consumeImageBitmap(image, t); |
| })); |
| }, 'Test that createImageBitmap from a bitmaprenderer canvas produces correct result'); |
| |
| async_test(function(t) { |
| var canvas = document.createElement("canvas"); |
| canvas.width = width; |
| canvas.height = height; |
| var ctx = canvas.getContext('bitmaprenderer'); |
| createImageBitmap(canvas).then(t.step_func_done(function(image) { |
| assert_equals(image.width, width); |
| assert_equals(image.height, height); |
| |
| var dstCanvas = document.createElement('canvas'); |
| dstCanvas.width = width; |
| dstCanvas.height = height; |
| var dstCtx = dstCanvas.getContext('2d'); |
| dstCtx.drawImage(canvas, 0, 0); |
| testCanvas(dstCtx, 5, 5, 0, 0, 0, 0); |
| })); |
| }, 'Test that createImageBitmap on a bitmaprenderer canvas that never consumes any source produces correct result'); |
| |
| |
| async_test(function(t) { |
| var canvas = document.createElement("canvas"); |
| canvas.width = width; |
| canvas.height = height; |
| var ctx = canvas.getContext('bitmaprenderer'); |
| ctx.transferFromImageBitmap(null); |
| createImageBitmap(canvas).then(t.step_func_done(function(image) { |
| assert_equals(image.width, width); |
| assert_equals(image.height, height); |
| |
| var dstCanvas = document.createElement('canvas'); |
| dstCanvas.width = width; |
| dstCanvas.height = height; |
| var dstCtx = dstCanvas.getContext('2d'); |
| dstCtx.drawImage(canvas, 0, 0); |
| testCanvas(dstCtx, 5, 5, 0, 0, 0, 0); |
| })); |
| }, 'Test that createImageBitmap on a bitmaprenderer canvas that consumes null produces correct result'); |
| </script> |
