| <!DOCTYPE html> |
| <!-- DO NOT EDIT! This test has been generated by tools/gentest.py. --> |
| <title>OffscreenCanvas test: 2d.imageData.get.order.rows</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/2dcontext/resources/canvas-tests.js"></script> |
| |
| <h1>2d.imageData.get.order.rows</h1> |
| <p class="desc">getImageData() returns topmost rows first</p> |
| |
| |
| <script> |
| var t = async_test("getImageData() returns topmost rows first"); |
| t.step(function() { |
| |
| var offscreenCanvas = new OffscreenCanvas(100, 50); |
| var ctx = offscreenCanvas.getContext('2d'); |
| |
| ctx.fillStyle = '#fff'; |
| ctx.fillRect(0, 0, 100, 50); |
| ctx.fillStyle = '#000'; |
| ctx.fillRect(0, 0, 100, 2); |
| var imgdata = ctx.getImageData(0, 0, 10, 10); |
| _assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0"); |
| _assertSame(imgdata.data[Math.floor(imgdata.width/2*4)], 0, "imgdata.data[Math.floor(imgdata.width/2*4)]", "0"); |
| _assertSame(imgdata.data[(imgdata.height/2)*imgdata.width*4], 255, "imgdata.data[(imgdata.height/2)*imgdata.width*4]", "255"); |
| |
| t.done(); |
| |
| }); |
| </script> |
