| <!DOCTYPE html> |
| <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> |
| <title>OffscreenCanvas test: 2d.imageData.object.readonly</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/html/canvas/resources/canvas-tests.js"></script> |
| |
| <h1>2d.imageData.object.readonly</h1> |
| <p class="desc">ImageData objects properties are read-only</p> |
| |
| |
| <script> |
| var t = async_test("ImageData objects properties are read-only"); |
| var t_pass = t.done.bind(t); |
| var t_fail = t.step_func(function(reason) { |
| throw reason; |
| }); |
| t.step(function() { |
| |
| var canvas = new OffscreenCanvas(100, 50); |
| var ctx = canvas.getContext('2d'); |
| |
| var imgdata = ctx.getImageData(0, 0, 10, 10); |
| var w = imgdata.width; |
| var h = imgdata.height; |
| var d = imgdata.data; |
| imgdata.width = 123; |
| imgdata.height = 123; |
| imgdata.data = [100,100,100,100]; |
| _assertSame(imgdata.width, w, "imgdata.width", "w"); |
| _assertSame(imgdata.height, h, "imgdata.height", "h"); |
| _assertSame(imgdata.data, d, "imgdata.data", "d"); |
| _assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0"); |
| _assertSame(imgdata.data[1], 0, "imgdata.data[\""+(1)+"\"]", "0"); |
| _assertSame(imgdata.data[2], 0, "imgdata.data[\""+(2)+"\"]", "0"); |
| _assertSame(imgdata.data[3], 0, "imgdata.data[\""+(3)+"\"]", "0"); |
| t.done(); |
| |
| }); |
| </script> |