| <!DOCTYPE html> |
| <script src="../../../resources/testharness.js"></script> |
| <script src="../../../resources/testharnessreport.js"></script> |
| <script> |
| function testCanvas(ctx, r, g, b, a) { |
| var colorData = ctx.getImageData(50, 50, 1, 1).data; |
| assert_equals(colorData[0], r); |
| assert_equals(colorData[1], g); |
| assert_equals(colorData[2], b); |
| assert_equals(colorData[3], a); |
| } |
| |
| function testTransferFromImageBitmapNullability(image, image2) { |
| var bitmapCanvas = document.createElement('canvas'); |
| bitmapCanvas.width = bitmapCanvas.height = 100; |
| var bitmapCtx = bitmapCanvas.getContext('bitmaprenderer'); |
| bitmapCtx.transferFromImageBitmap(image); |
| |
| // Make sure the bitmap renderer canvas is filled correctly. |
| var myCanvas = document.createElement('canvas'); |
| myCanvas.width = myCanvas.height = 100; |
| var myCtx = myCanvas.getContext('2d'); |
| myCtx.drawImage(bitmapCanvas, 0, 0); |
| testCanvas(myCtx, 0, 255, 0, 255); |
| |
| // Test if passing null resets the bitmap renderer canvas. |
| // Drawing the resetted canvas cannot change the destination canvas. |
| bitmapCtx.transferFromImageBitmap(null); |
| var myCanvas2 = document.createElement('canvas'); |
| myCanvas2.width = myCanvas2.height = 100; |
| var myCtx2 = myCanvas2.getContext('2d'); |
| myCtx2.drawImage(bitmapCanvas, 0, 0); |
| testCanvas(myCtx2, 0, 0, 0, 0); |
| |
| // Test if we can redraw the bitmap canvas correctly after reset. |
| bitmapCtx.transferFromImageBitmap(image2); |
| var myCanvas3 = document.createElement('canvas'); |
| myCanvas3.width = myCanvas3.height = 100; |
| var myCtx3 = myCanvas3.getContext('2d'); |
| myCtx3.drawImage(bitmapCanvas, 0, 0); |
| testCanvas(myCtx3, 255, 0, 0, 255); |
| } |
| |
| function fillCanvas(canvas, style, r, g, b) |
| { |
| var ctx = canvas.getContext('2d'); |
| ctx.fillStyle = style; |
| ctx.fillRect(0, 0, 100, 100); |
| testCanvas(ctx, r, g, b, 255); |
| } |
| |
| promise_test(function() { |
| var canvas = document.createElement('canvas'); |
| canvas.width = canvas.height = 100; |
| fillCanvas(canvas, '#0f0', 0, 255, 0); |
| |
| var canvas2 = document.createElement('canvas'); |
| canvas2.width = canvas2.height = 100; |
| fillCanvas(canvas2, '#f00', 255, 0, 0); |
| |
| return Promise.all([ |
| createImageBitmap(canvas), |
| createImageBitmap(canvas2), |
| ]).then(([image, image2]) => { |
| testTransferFromImageBitmapNullability(image, image2); |
| }); |
| }, 'testTransferFromImageBitmapNullability should not return any error'); |
| |
| </script> |
| |
