| <!DOCTYPE html> |
| <!-- DO NOT EDIT! This test has been generated by tools/gentest.py. --> |
| <title>OffscreenCanvas test: 2d.imageData.create1.initial</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/2dcontext/resources/canvas-tests.js"></script> |
| |
| <h1>2d.imageData.create1.initial</h1> |
| <p class="desc">createImageData(imgdata) returns transparent black data of the right size</p> |
| |
| |
| <script> |
| var t = async_test("createImageData(imgdata) returns transparent black data of the right size"); |
| t.step(function() { |
| |
| var offscreenCanvas = new OffscreenCanvas(100, 50); |
| var ctx = offscreenCanvas.getContext('2d'); |
| |
| ctx.fillStyle = '#0f0'; |
| ctx.fillRect(0, 0, 100, 50); |
| var imgdata1 = ctx.getImageData(0, 0, 10, 20); |
| var imgdata2 = ctx.createImageData(imgdata1); |
| _assertSame(imgdata2.data.length, imgdata1.data.length, "imgdata2.data.length", "imgdata1.data.length"); |
| _assertSame(imgdata2.width, imgdata1.width, "imgdata2.width", "imgdata1.width"); |
| _assertSame(imgdata2.height, imgdata1.height, "imgdata2.height", "imgdata1.height"); |
| var isTransparentBlack = true; |
| for (var i = 0; i < imgdata2.data.length; ++i) |
| if (imgdata2.data[i] !== 0) |
| isTransparentBlack = false; |
| _assert(isTransparentBlack, "isTransparentBlack"); |
| |
| t.done(); |
| |
| }); |
| </script> |
