| // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. |
| // OffscreenCanvas test in a worker:2d.clearRect.negative |
| // Description:clearRect of negative sizes works |
| // Note: |
| |
| importScripts("/resources/testharness.js"); |
| importScripts("/html/canvas/resources/canvas-tests.js"); |
| |
| var t = async_test("clearRect of negative sizes works"); |
| var t_pass = t.done.bind(t); |
| var t_fail = t.step_func(function(reason) { |
| throw reason; |
| }); |
| 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(); |
| |
| }); |
| done(); |