dom/canvas/test/webgl-conf/checkout/conformance/glsl/bugs/sampler-array-struct-function-arg.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>GLSL struct containing an array of samplers passed into a user-defined function</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 <script src="../../../js/glsl-conformance-test.js"></script>
  16 </head>
  17 <body>
  18
  19 <canvas id="output" style="border: none;" width="64" height="64"></canvas>
  20 <div id="description"></div>
  21 <div id="console"></div>
  22 <script id="fshaderSampler" type="x-shader/x-fragment">
  23 precision mediump float;
  24
  25 struct S {
  26     sampler2D sam[2];
  27 };
  28
  29 uniform S uni;
  30
  31 vec4 useSampler(S arg)
  32 {
  33     return texture2D(arg.sam[0], vec2(0.0, 0.0));
  34 }
  35
  36 void main() {
  37     gl_FragColor = vec4(useSampler(uni));
  38 }
  39 </script>
  40 <script type="application/javascript">
  41 "use strict";
  42 description();
  43
  44 var wtu = WebGLTestUtils;
  45 var canvas = document.getElementById("output");
  46 var gl = wtu.create3DContext(canvas);
  47
  48 if (!gl) {
  49     testFailed("Could not create a GL context.");
  50 } else {
  51     debug("Drawing with a shader that uses a sampler array in a struct passed into a function.");
  52     var program = wtu.setupProgram(
  53         gl, [wtu.simpleVertexShader, 'fshaderSampler'], ['a_position'], [0], true);
  54     wtu.setupUnitQuad(gl);
  55
  56     var tex = gl.createTexture();
  57     gl.bindTexture(gl.TEXTURE_2D, tex);
  58     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
  59     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
  60     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
  61     gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
  62     wtu.fillTexture(gl, tex, 1, 1, [0, 255, 0, 255]);
  63
  64     wtu.clearAndDrawUnitQuad(gl);
  65     wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green");
  66 }
  67
  68 var successfullyParsed = true;
  69 </script>
  70 <script src="../../../js/js-test-post.js"></script>
  71 </body>
  72 </html>