| <!DOCTYPE html> |
| <!-- DO NOT EDIT! This test has been generated by tools/gentest.py. --> |
| <title>OffscreenCanvas test: 2d.clearRect.negative</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/common/canvas-tests.js"></script> |
| |
| <h1>2d.clearRect.negative</h1> |
| <p class="desc">clearRect of negative sizes works</p> |
| |
| |
| <script> |
| var t = async_test("clearRect of negative sizes works"); |
| t.step(function() { |
| |
| var offscreenCanvas = new OffscreenCanvas(100, 50); |
| var ctx = offscreenCanvas.getContext('2d'); |
| |
| ctx.fillStyle = '#f00'; |
| ctx.fillRect(0, 0, 100, 50); |
| ctx.clearRect(0, 0, 50, 25); |
| ctx.clearRect(100, 0, -50, 25); |
| ctx.clearRect(0, 50, 50, -25); |
| ctx.clearRect(100, 50, -50, -25); |
| _assertPixel(offscreenCanvas, 25,12, 0,0,0,0, "25,12", "0,0,0,0"); |
| _assertPixel(offscreenCanvas, 75,12, 0,0,0,0, "75,12", "0,0,0,0"); |
| _assertPixel(offscreenCanvas, 25,37, 0,0,0,0, "25,37", "0,0,0,0"); |
| _assertPixel(offscreenCanvas, 75,37, 0,0,0,0, "75,37", "0,0,0,0"); |
| |
| t.done(); |
| |
| }); |
| </script> |
