dom/canvas/test/webgl-conf/checkout/conformance/attribs/gl-bindAttribLocation-repeated.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 Repeated BindAttribLocation Test</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 <canvas id="example" width="50" height="50">
  18 </canvas>
  19 <div id="description"></div>
  20 <div id="console"></div>
  21 <script id="vshader" type="x-shader/x-vertex">
  22     attribute vec4 vPosition;
  23     void main()
  24     {
  25         gl_Position = vPosition;
  26     }
  27 </script>
  28
  29 <script id="fshader" type="x-shader/x-fragment">
  30     void main()
  31     {
  32         gl_FragColor = vec4(0.0,1.0,0.0,1.0);
  33     }
  34 </script>
  35
  36 <script>
  37 "use strict";
  38 description("Test repeated loading of programs involving bindAttribLocation calls");
  39 debug("Regression test for <a href='https://code.google.com/p/chromium/issues/detail?id=510637'>crbug.com/510637</a>");
  40 var wtu = WebGLTestUtils;
  41 var gl = wtu.create3DContext("example");
  42 var g_program;
  43 var g_attribLocation;
  44 function setup(attribIndex) {
  45   var program = wtu.setupProgram(
  46       gl, ['vshader', 'fshader'], ['vPosition'], [attribIndex]);
  47   g_program = program;
  48   g_attribLocation = attribIndex;
  49   shouldBe("gl.getAttribLocation(g_program, 'vPosition')", "g_attribLocation");
  50   return program;
  51 }
  52
  53 var p0 = setup(0);
  54 var p3 = setup(3);
  55 var p1 = setup(1);
  56 // This call fails the getAttribLocation check on some drivers when
  57 // Chrome's program binary cache is enabled. On the affected drivers,
  58 // it returns the bound attribute location from the first binary
  59 // created. Swapping 0 and 1 above will cause it to return 1 rather
  60 // than 0.
  61 p3 = setup(3);
  62
  63 var successfullyParsed = true;
  64 </script>
  65 <script src="../../js/js-test-post.js"></script>
  66
  67 </body>
  68 </html>