| <!DOCTYPE html> |
| <!-- DO NOT EDIT! This test has been generated by tools/gentest.py. --> |
| <title>OffscreenCanvas test: 2d.imageData.object.clamp</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/2dcontext/resources/canvas-tests.js"></script> |
| |
| <h1>2d.imageData.object.clamp</h1> |
| <p class="desc">ImageData.data clamps numbers to [0, 255]</p> |
| |
| |
| <script> |
| var t = async_test("ImageData.data clamps numbers to [0, 255]"); |
| t.step(function() { |
| |
| var offscreenCanvas = new OffscreenCanvas(100, 50); |
| var ctx = offscreenCanvas.getContext('2d'); |
| |
| var imgdata = ctx.getImageData(0, 0, 10, 10); |
| imgdata.data[0] = 100; |
| imgdata.data[0] = 300; |
| _assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255"); |
| imgdata.data[0] = 100; |
| imgdata.data[0] = -100; |
| _assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0"); |
| imgdata.data[0] = 100; |
| imgdata.data[0] = 200+Math.pow(2, 32); |
| _assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255"); |
| imgdata.data[0] = 100; |
| imgdata.data[0] = -200-Math.pow(2, 32); |
| _assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0"); |
| imgdata.data[0] = 100; |
| imgdata.data[0] = Math.pow(10, 39); |
| _assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255"); |
| imgdata.data[0] = 100; |
| imgdata.data[0] = -Math.pow(10, 39); |
| _assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0"); |
| imgdata.data[0] = 100; |
| imgdata.data[0] = -Infinity; |
| _assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0"); |
| imgdata.data[0] = 100; |
| imgdata.data[0] = Infinity; |
| _assertSame(imgdata.data[0], 255, "imgdata.data[\""+(0)+"\"]", "255"); |
| |
| t.done(); |
| |
| }); |
| </script> |
