dom/canvas/test/webgl-conf/checkout/conformance/extensions/get-extension.html

   1 <!--
   2 Copyright (c) 2019 The Khronos Group Inc.
   3 Use of this source code is governed by an MIT-style license that can be
   4 found in the LICENSE.txt file.
   5 -->
   6
   7 <!DOCTYPE html>
   8 <html>
   9 <head>
  10 <meta charset="utf-8">
  11 <title>WebGL Extension Conformance Tests</title>
  12 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
  13 <script src="../../js/js-test-pre.js"></script>
  14 <script src="../../js/webgl-test-utils.js"></script>
  15 </head>
  16 <body>
  17 <div id="description"></div>
  18 <canvas id="canvas" style="width: 50px; height: 50px;"> </canvas>
  19 <div id="console"></div>
  20 <script>
  21 "use strict";
  22
  23 var pseudoRandom = (function() {
  24     var seed = 3;
  25     return function() {
  26         seed = (seed * 11 + 17) % 25;
  27         return seed / 25;
  28     };
  29 })();
  30
  31 var randomizeCase = function(str) {
  32     var newChars = [];
  33     for (var ii = 0; ii < str.length; ++ii) {
  34         var c = str.substr(ii, 1);
  35         var m = (pseudoRandom() > 0.5) ? c.toLowerCase() : c.toUpperCase();
  36         newChars.push(m);
  37     }
  38     return newChars.join("");
  39 };
  40
  41 description();
  42
  43 var wtu = WebGLTestUtils;
  44 var canvas = document.getElementById("canvas");
  45 var gl = wtu.create3DContext(canvas);
  46
  47 var ii;
  48
  49 debug("check every extension advertised can be enabled");
  50 debug("");
  51 var extensionNames = gl.getSupportedExtensions();
  52 var extensionNamesLower = [];
  53 for (ii = 0; ii < extensionNames.length; ++ii) {
  54     extensionNamesLower.push(extensionNames[ii].toLowerCase());
  55 }
  56
  57 for (ii = 0; ii < extensionNames.length; ++ii) {
  58     var originalName = extensionNames[ii];
  59     var mixedName = randomizeCase(originalName);
  60     var extension = gl.getExtension(mixedName);
  61     assertMsg(extension, "able to get " + originalName + " as " + mixedName);
  62     if (extension) {
  63         var kTestString = "this is a test";
  64         var kTestNumber = 123;
  65         var kTestFunction = function() { };
  66         var kTestObject = { };
  67         extension.testStringProperty = kTestString;
  68         extension.testNumberProperty = kTestNumber;
  69         extension.testFunctionProperty = kTestFunction;
  70         extension.testObjectProperty = kTestObject;
  71         webglHarnessCollectGarbage();
  72         var extension2 = gl.getExtension(originalName);
  73         assertMsg(
  74             extension === extension2,
  75             "calling getExtension twice for the same extension returns the same object");
  76         assertMsg(
  77             extension2.testStringProperty === kTestString &&
  78             extension2.testFunctionProperty === kTestFunction &&
  79             extension2.testObjectProperty === kTestObject &&
  80             extension2.testNumberProperty === kTestNumber,
  81             "object returned by 2nd call to getExtension has same properties");
  82
  83         var prefixedVariants = wtu.getExtensionPrefixedNames(originalName);
  84         for (var jj = 0; jj < prefixedVariants.length; ++jj) {
  85             assertMsg(
  86                 gl.getExtension(prefixedVariants[jj]) === null ||
  87                 extensionNamesLower.indexOf(prefixedVariants[jj].toLowerCase()) !== -1,
  88                 "getExtension('" + prefixedVariants[jj] + "') returns an object only if the name is returned by getSupportedExtensions");
  89         }
  90     }
  91     debug("");
  92 }
  93
  94 var successfullyParsed = true;
  95 </script>
  96 <script src="../../js/js-test-post.js"></script>
  97
  98 </body>
  99 </html>