dom/canvas/test/webgl-conf/checkout/conformance/glsl/constructors/glsl-construct-vec-mat-index.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.
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   6
   7 <!DOCTYPE html>
   8 <html>
   9 <head>
  10 <meta charset="utf-8">
  11 <title>WebGL GLSL Conformance Tests</title>
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  14 <script src="../../../js/js-test-pre.js"></script>
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  22 // A matrix constructor with two writes and reads to the same variable inside it in different parameters must succeed "mat2(index++, vec4(index++))"
  23 // ESSL 1.00 spec section 5.4 Constructors: "Arguments are evaluated from left to right."
  24 precision mediump float;
  25 bool equal(mat2 m1, mat2 m2)
  26 {
  27     float EPSILON = 0.00001;
  28     for (int i = 0; i < 2; i++) {
  29         for (int j = 0; j < 2; j++) {
  30             if (abs(m1[i][j] - m2[i][j]) > EPSILON)
  31                 return false;
  32         }
  33     }
  34     return true;
  35 }
  36 void main()
  37 {
  38     int i = 0;
  39     mat2 m = mat2(i++, vec4(i++));
  40     if (equal(m, mat2(0, 1, 1, 1)))
  41         gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
  42     else
  43         gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
  44 }
  45 </script>
  46
  47 <script>
  48 "use strict";
  49 GLSLConformanceTester.runRenderTest();
  50 var successfullyParsed = true;
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  52 </body>
  53 </html>