| <!DOCTYPE html> |
| <script src="../../resources/js-test.js"></script> |
| <script> |
| var aCanvas = new OffscreenCanvas(50, 50); |
| var ctx = aCanvas.getContext('2d'); |
| |
| ctx.rect(0, 0, 25, 50); |
| ctx.clip(); |
| ctx.translate(20, 20); |
| // Verify backing is reset through transferToImageBitmap() |
| ctx.fillStyle = '#0f0'; |
| var firstImage = aCanvas.transferToImageBitmap(); |
| // trasnform should be preserved |
| ctx.fillRect(0, 0, 10, 10); |
| var secondImage = aCanvas.transferToImageBitmap(); |
| |
| var testCanvas = document.createElement('canvas'); |
| var testCtx = testCanvas.getContext('2d'); |
| testCtx.drawImage(secondImage, 0, 0); |
| // Verify that transform was carried over. |
| var imgData = testCtx.getImageData(23, 25, 1, 1).data; |
| shouldBe("imgData[0]", "0"); |
| shouldBe("imgData[1]", "255"); |
| shouldBe("imgData[2]", "0"); |
| shouldBe("imgData[3]", "255"); |
| // Verify that clip was carried over. |
| var imgData = testCtx.getImageData(27, 25, 1, 1).data; |
| shouldBe("imgData[0]", "0"); |
| shouldBe("imgData[1]", "0"); |
| shouldBe("imgData[2]", "0"); |
| shouldBe("imgData[3]", "0"); |
| </script> |
