dom/canvas/test/webgl-conf/checkout/conformance/state/gl-initial-state.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 initial values 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 the initial value of the OpenGL state");
  23
  24 debug("");
  25 debug("Canvas.getContext");
  26
  27 var wtu = WebGLTestUtils;
  28 var gl = wtu.create3DContext("canvas");
  29 if (!gl) {
  30   testFailed("context does not exist");
  31 } else {
  32   testPassed("context exists");
  33
  34   debug("");
  35   checkParameterInitialValue("ONE", "BLEND_SRC_RGB");
  36   checkParameterInitialValue("ONE", "BLEND_SRC_ALPHA");
  37   checkParameterInitialValue("ZERO", "BLEND_DST_RGB");
  38   checkParameterInitialValue("ZERO", "BLEND_DST_ALPHA");
  39   shouldBe("gl.getError()", "gl.NO_ERROR");
  40 }
  41
  42 function checkParameterInitialValue(expected, enum_val) {
  43   var s = gl.getParameter(gl[enum_val]);
  44   if (s === gl[expected]) {
  45     testPassed("getParameter(gl." + enum_val + ") returned " + expected + " which is " + gl[expected]);
  46   } else {
  47     testFailed("getParameter(gl." + enum_val + ") returned " + s + " expected: " + expected + " which is " + gl[expected]);
  48   }
  49 }
  50
  51 debug("");
  52 var successfullyParsed = true;
  53
  54 </script>
  55 <script src="../../js/js-test-post.js"></script>
  56
  57 </body>
  58 </html>