dom/canvas/test/webgl-conf/checkout/conformance2/context/context-attributes-depth-stencil-antialias-obeyed.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 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
  12 <script src="../../js/js-test-pre.js"></script>
  13 </head>
  14 <body>
  15 <div id="description"></div>
  16 <div id="console"></div>
  17 <script>
  18 "use strict";
  19
  20 function getWebGL(attribs) {
  21   var canvas = document.createElement("canvas");
  22   if (!canvas)
  23     return null;
  24
  25   // We can't use wtu.create3DContext because it defaults to antialias=false.
  26   var names = ["webgl2"];
  27   var gl = null;
  28   for (var i = 0; i < names.length; ++i) {
  29     try {
  30       gl = canvas.getContext(names[i], attribs);
  31     } catch (e) {
  32     }
  33     if (gl) {
  34       break;
  35     }
  36   }
  37   if (!gl)
  38     return null;
  39   return gl;
  40 }
  41
  42 function testAttribs(attribs) {
  43   var antialias, depth, stencil;
  44   if (!attribs) {
  45     antialias = true;
  46     depth = true;
  47     stencil = false;
  48     debug("Testing default attributes: { antialias: true, depth: true, stencil:false }");
  49   } else {
  50     antialias = attribs.antialias;
  51     depth = attribs.depth;
  52     stencil = attribs.stencil;
  53     debug("Testing specified attributes: { antialias: " + antialias + ", depth: " + depth + ", stencil: " + stencil + " }");
  54   }
  55   var gl = getWebGL(attribs);
  56   if (!gl) {
  57     testFailed("Fail to create a context");
  58     return;
  59   }
  60   var actual_attribs = gl.getContextAttributes();
  61   if (antialias != actual_attribs.antialias)
  62     testFailed("antialias = " + antialias + " is not obeyed")
  63   if (depth != actual_attribs.depth)
  64     testFailed("depth = " + depth + " is not obeyed")
  65   if (stencil != actual_attribs.stencil)
  66     testFailed("stencil = " + stencil + " is not obeyed")
  67   if (antialias == actual_attribs.antialias &&
  68       depth == actual_attribs.depth &&
  69       stencil == actual_attribs.stencil) {
  70     testPassed("Context created with the correct antialias, depth, and stencil.");
  71   }
  72 }
  73
  74 description('Verify WebGLContextAttributes are working as specified, including depth, stencil, antialias');
  75 testAttribs(null);  // Default attribs
  76 testAttribs({antialias: true, depth: true, stencil: true});
  77 testAttribs({antialias: false, depth: true, stencil: true});
  78 testAttribs({antialias: true, depth: false, stencil: true});
  79 testAttribs({antialias: false, depth: false, stencil: true});
  80 testAttribs({antialias: true, depth: true, stencil: false});
  81 testAttribs({antialias: false, depth: true, stencil: false});
  82 testAttribs({antialias: true, depth: false, stencil: false});
  83 testAttribs({antialias: false, depth: false, stencil: false});
  84
  85 var successfullyParsed = true;
  86 </script>
  87 <script src="../../js/js-test-post.js"></script>
  88 </body>
  89 </html>