| description("Series of tests to ensure correct behaviour of getImageData and putImageData when alpha is involved"); |
| var ctx = document.getElementById('canvas').getContext('2d'); |
| ctx.fillStyle = 'rgba(255, 0, 0, 0.01)'; |
| ctx.fillRect(0, 0, 1, 200); |
| ctx.fillStyle = 'rgba(0, 255, 0, 0.995)'; |
| ctx.fillRect(1, 0, 199, 200); |
| var imageData = ctx.getImageData(0, 0, 200, 200); |
| var imgdata = imageData.data; |
| shouldBe("imgdata[4]", "0"); |
| shouldBe("imgdata[5]", "255"); |
| shouldBe("imgdata[6]", "0"); |
| shouldBe("imgdata[7]", "253"); |
| |
| ctx.putImageData(imageData, 0, 0); |
| |
| imgdata = ctx.getImageData(0, 0, 200, 200).data; |
| |
| shouldBe("imgdata[4]", "0"); |
| shouldBe("imgdata[5]", "255"); |
| shouldBe("imgdata[6]", "0"); |
| shouldBe("imgdata[7]", "253"); |
| |
| var successfullyParsed = true; |
