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struct-as-out-parameter.html (2983B)

      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>GLSL Structure as Out Parameter Test</title>
     12 <link rel="stylesheet" href="../../../resources/js-test-style.css"/>
     13 <link rel="stylesheet" href="../../../resources/glsl-feature-tests.css"/>
     14 <script src="../../../js/js-test-pre.js"></script>
     15 <script src="../../../js/webgl-test-utils.js"> </script>
     16 <script src="../../../js/glsl-conformance-test.js"></script>
     17 
     18 <script id="simple-vs" type="x-shader/x-vertex">
     19 attribute vec4 a_position;
     20 void main(void) {
     21    gl_Position = a_position;
     22 }
     23 </script>
     24 <script id="struct-out-parameter-fs" type="x-shader/x-fragment">
     25 struct ColorData {
     26  vec3 red;
     27  vec3 blue;
     28 };
     29 
     30 void modify(out ColorData colorData) {
     31  colorData.red = vec3(1.0, 0.0, 0.0);
     32  colorData.blue = vec3(0.0, 0.0, 1.0);
     33 }
     34 
     35 void main() {
     36  ColorData colorData;
     37 
     38  vec3 red = vec3(1.0, 0.0, 0.0);
     39  vec3 green = vec3(0.0, 1.0, 0.0);
     40  vec3 blue = vec3(0.0, 0.0, 1.0);
     41  vec3 finalColor;
     42 
     43  modify(colorData);
     44 
     45  if (colorData.red == red && colorData.blue == blue)
     46    finalColor = green;
     47  else
     48    finalColor = red;
     49 
     50  gl_FragColor = vec4(finalColor, 1.0);
     51 }
     52 </script>
     53 </head>
     54 <body>
     55 <div id="description"></div>
     56 <div id="console"></div>
     57 <script>
     58 "use strict";
     59 description("Testing structs as out parameter");
     60 
     61 debug('Regression test for <a href="http://crbug.com/851873">http://crbug.com/851873</a> / <a href="https://github.com/mrdoob/three.js/issues/14137">https://github.com/mrdoob/three.js/issues/14137</a>');
     62 
     63 function prepend(floatPrecision) {
     64  let source = document.getElementById('struct-out-parameter-fs').text;
     65  return 'precision ' + floatPrecision + ' float;\n' + source;
     66 }
     67 
     68 let tests = [
     69  {
     70    vShaderId: "simple-vs",
     71    vShaderSuccess: true,
     72    fShaderSource: prepend('lowp'),
     73    fShaderSuccess: true,
     74    linkSuccess: true,
     75    render: true,
     76    passMsg: "lowp struct used as out parameter",
     77  },
     78  {
     79    vShaderId: "simple-vs",
     80    vShaderSuccess: true,
     81    fShaderSource: prepend('mediump'),
     82    fShaderSuccess: true,
     83    linkSuccess: true,
     84    render: true,
     85    passMsg: "mediump struct used as out parameter",
     86  },
     87 ];
     88 
     89 let wtu = WebGLTestUtils;
     90 let gl = wtu.create3DContext();
     91 let precision = gl.getShaderPrecisionFormat(gl.FRAGMENT_SHADER, gl.HIGH_FLOAT);
     92 let highpSupported = (precision.rangeMin >= 62 && precision.rangeMax >= 62 && precision.precision >= 16);
     93 debug("highp is" + (highpSupported ? "" : " not") + " supported in fragment shaders");
     94 
     95 if (highpSupported) {
     96  tests.push(
     97    {
     98      vShaderId: "simple-vs",
     99      vShaderSuccess: true,
    100      fShaderSource: prepend('highp'),
    101      fShaderSuccess: true,
    102      linkSuccess: true,
    103      render: true,
    104      passMsg: "highp struct used as out parameter",
    105    }
    106  );
    107 }
    108 
    109 GLSLConformanceTester.runTests(tests);
    110 debug("");
    111 
    112 var successfullyParsed = true;
    113 </script>
    114 </body>
    115 </html>