dom/canvas/test/webgl-conf/checkout/conformance2/programs/active-built-in-attribs.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 Conformance Tests: Verify validation for active built-in attribs</title>
  12 <link rel="stylesheet" href="../../resources/js-test-style.css"/>
  13 <script src="../../js/desktop-gl-constants.js"></script>
  14 <script src="../../js/js-test-pre.js"></script>
  15 <script src="../../js/webgl-test-utils.js"></script>
  16 </head>
  17 <body>
  18 <div id="description"></div>
  19 <canvas id="canvas" style="width: 64px; height: 64px;"> </canvas>
  20 <div id="console"></div>
  21 <script id="vs" type="x-shader/x-vertex">#version 300 es
  22 void main() {
  23   gl_Position = vec4(gl_VertexID % 2, (gl_VertexID/2) % 2, 0, 1);
  24 }
  25 </script>
  26
  27 <script id="fs" type="x-shader/x-fragment">#version 300 es
  28 precision mediump float;
  29 out vec4 fragColor;
  30 void main() {
  31   fragColor = vec4(0, 1, 0, 1);
  32 }
  33 </script>
  34
  35 <script>
  36 "use strict";
  37 description("This test verifies validation for active built-in attribs.");
  38
  39 debug("");
  40
  41 var wtu = WebGLTestUtils;
  42 var canvas = document.getElementById("canvas");
  43 var gl = wtu.create3DContext(canvas, null, 2);
  44
  45 if (!gl) {
  46   testFailed("WebGL context does not exist");
  47 } else {
  48   testPassed("WebGL context exists");
  49   runTests();
  50 }
  51
  52 var activeInfo, attribLoc;
  53
  54 function runTests() {
  55   var prog = wtu.setupProgram(gl, ["vs", "fs"]);
  56   if (!prog) {
  57     testFailed("Set up program failed");
  58     return;
  59   }
  60   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "No GL error from set up");
  61
  62   var numActive = gl.getProgramParameter(prog, gl.ACTIVE_ATTRIBUTES);
  63   if (numActive != 1) {
  64     testFailed('ACTIVE_ATTRIBUTES should be 1.');
  65     return;
  66   }
  67   testPassed('ACTIVE_ATTRIBUTES should be 1.');
  68
  69   activeInfo = gl.getActiveAttrib(prog, 0);
  70   if (!activeInfo) {
  71     testFailed('getActiveAttrib should return an info object.');
  72     return;
  73   }
  74
  75   shouldBe('activeInfo.name', '"gl_VertexID"');
  76   attribLoc = gl.getAttribLocation(prog, 'gl_VertexID');
  77   wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Should be able to request the location of a built-in.");
  78   shouldBe('attribLoc', '-1');
  79 }
  80
  81 var successfullyParsed = true;
  82 </script>
  83 <script src="../../js/js-test-post.js"></script>
  84
  85 </body>
  86 </html>