<!DOCTYPE html> <!-- DO NOT EDIT! This test has been generated by tools/gentest.py. --> <title>Canvas test: 2d.imageData.object.clamp</title> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script src="/common/canvas-tests.js"></script> <link rel="stylesheet" href="/common/canvas-tests.css"> <body class="show_output"> <h1>2d.imageData.object.clamp</h1> <p class="desc">ImageData.data clamps numbers to [0, 255]</p> <p class="output">Actual output:</p> <canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas> <ul id="d"></ul> <script> var t = async_test("ImageData.data clamps numbers to [0, 255]"); _addTest(function(canvas, ctx) { 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"); }); </script>