| <!DOCTYPE html> |
| <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> |
| <title>OffscreenCanvas test: 2d.imageData.get.range</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.get.range</h1> |
| <p class="desc">getImageData() returns values in the range [0, 255]</p> |
| |
| |
| <script> |
| var t = async_test("getImageData() returns values in the range [0, 255]"); |
| 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'); |
| |
| ctx.fillStyle = '#000'; |
| ctx.fillRect(0, 0, 100, 50); |
| ctx.fillStyle = '#fff'; |
| ctx.fillRect(20, 10, 60, 10); |
| var imgdata1 = ctx.getImageData(10, 5, 1, 1); |
| _assertSame(imgdata1.data[0], 0, "imgdata1.data[\""+(0)+"\"]", "0"); |
| var imgdata2 = ctx.getImageData(30, 15, 1, 1); |
| _assertSame(imgdata2.data[0], 255, "imgdata2.data[\""+(0)+"\"]", "255"); |
| t.done(); |
| |
| }); |
| </script> |