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sampler-array-using-loop-index.html (2014B)

      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>Sampler arrays using loop index should compile fine.</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="4" height="4" style="width: 40px; height: 30px;"></canvas>
     18 <div id="description"></div>
     19 <div id="console"></div>
     20 <script id="vshader" type="x-shader/x-vertex">
     21 attribute vec4 vPosition;
     22 void main()
     23 {
     24  gl_Position = vPosition;
     25 }
     26 </script>
     27 
     28 <script id="fshader" type="x-shader/x-fragment">
     29 precision mediump float;
     30 uniform sampler2D uni[2];
     31 
     32 float zero(int x)
     33 {
     34  return float(x) - float(x);
     35 }
     36 
     37 void main()
     38 {
     39  vec4 c = vec4(0,0,0,0);
     40  for (int ii = 1; ii < 3; ++ii) {
     41    if (c.x > 255.0) {
     42      c.x = 255.0 + zero(ii);
     43      break;
     44    }
     45    c += texture2D(uni[ii - 1], vec2(0.5, 0.5));
     46  }
     47  gl_FragColor = c;
     48 }
     49 </script>
     50 <script>
     51 "use strict";
     52 description(document.title);
     53 var wtu = WebGLTestUtils;
     54 var gl = wtu.create3DContext("example");
     55 var program = wtu.setupTexturedQuad(gl);
     56 
     57 //------------------------------------------------------------------------------
     58 var program = wtu.setupProgram(
     59    gl, ['vshader', 'fshader'], ['vPosition'], undefined, true);
     60 
     61 for (var ii = 0; ii < 2; ++ii) {
     62  var loc = gl.getUniformLocation(program, "uni[" + ii + "]");
     63  gl.activeTexture(gl.TEXTURE0 + ii);
     64  var tex = gl.createTexture();
     65  wtu.fillTexture(gl, tex, 1, 1, [32, 16, 8, ii * 9], 0);
     66  gl.uniform1i(loc, ii);
     67 }
     68 
     69 wtu.clearAndDrawUnitQuad(gl);
     70 wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup.");
     71 wtu.checkCanvas(gl, [64, 32, 16, 9],
     72                "Should render correctly", 1);
     73 
     74 var successfullyParsed = true;
     75 
     76 </script>
     77 <script src="../../../js/js-test-post.js"></script>
     78 
     79 </body>
     80 </html>