| <!DOCTYPE html> |
| <!-- DO NOT EDIT! This test has been generated by tools/gentest.py. --> |
| <title>OffscreenCanvas test: 2d.imageData.get.clamp</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/common/canvas-tests.js"></script> |
| |
| <h1>2d.imageData.get.clamp</h1> |
| <p class="desc">getImageData() clamps colours to the range [0, 255]</p> |
| |
| |
| <script> |
| var t = async_test("getImageData() clamps colours to the range [0, 255]"); |
| t.step(function() { |
| |
| var offscreenCanvas = new OffscreenCanvas(100, 50); |
| var ctx = offscreenCanvas.getContext('2d'); |
| |
| ctx.fillStyle = 'rgb(-100, -200, -300)'; |
| ctx.fillRect(0, 0, 100, 50); |
| ctx.fillStyle = 'rgb(256, 300, 400)'; |
| ctx.fillRect(20, 10, 60, 10); |
| var imgdata1 = ctx.getImageData(10, 5, 1, 1); |
| _assertSame(imgdata1.data[0], 0, "imgdata1.data[\""+(0)+"\"]", "0"); |
| _assertSame(imgdata1.data[1], 0, "imgdata1.data[\""+(1)+"\"]", "0"); |
| _assertSame(imgdata1.data[2], 0, "imgdata1.data[\""+(2)+"\"]", "0"); |
| var imgdata2 = ctx.getImageData(30, 15, 1, 1); |
| _assertSame(imgdata2.data[0], 255, "imgdata2.data[\""+(0)+"\"]", "255"); |
| _assertSame(imgdata2.data[1], 255, "imgdata2.data[\""+(1)+"\"]", "255"); |
| _assertSame(imgdata2.data[2], 255, "imgdata2.data[\""+(2)+"\"]", "255"); |
| |
| t.done(); |
| |
| }); |
| </script> |