dom/canvas/test/webgl-conf/checkout/conformance2/state/gl-getstring.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 gl.getParameter Strings 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 <div id="console"></div>
  19 <canvas id="canvas" width="2" height="2"> </canvas>
  20 <script>
  21 "use strict";
  22 description("This test checks getParameter returns strings in the correct format");
  23
  24 debug("");
  25 debug("Canvas.getContext");
  26
  27 var wtu = WebGLTestUtils;
  28 var gl = wtu.create3DContext("canvas", null, 2);
  29 if (!gl) {
  30   testFailed("context does not exist");
  31 } else {
  32   testPassed("context exists");
  33
  34   debug("");
  35   checkPrefix("WebGL 2.0", "VERSION");
  36   checkPrefix("WebGL GLSL ES 3.00", "SHADING_LANGUAGE_VERSION");
  37   shouldBeNonNull("gl.getParameter(gl.VENDOR)");
  38   shouldBeNonNull("gl.getParameter(gl.RENDERER)");
  39   shouldBe("gl.getError()", "gl.NO_ERROR");
  40 }
  41
  42 function checkPrefix(expected, enum_val) {
  43   var s = gl.getParameter(gl[enum_val]);
  44   if (s != null &&
  45       s.length >= expected.length &&
  46       s.substring(0, expected.length) == expected) {
  47     testPassed("getParameter(gl." + enum_val + ") correctly started with " + expected);
  48   } else {
  49     testFailed("getParameter(gl." + enum_val + ") did not start with " + expected);
  50   }
  51 }
  52
  53 debug("");
  54 var successfullyParsed = true;
  55
  56 </script>
  57 <script src="../../js/js-test-post.js"></script>
  58
  59 </body>
  60 </html>