dom/canvas/test/webgl-conf/checkout/conformance2/glsl3/no-attribute-vertex-shader.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>Test no attribute vertex shaders</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 <div id="description"></div>
  18 <div id="console"></div>
  19 <script id="vertex-shader" type="x-shader/x-vertex">#version 300 es
  20
  21 void main() {
  22   ivec2 xy = ivec2(
  23       gl_VertexID % 2,
  24       (gl_VertexID / 2 + gl_VertexID / 3) % 2);
  25   gl_Position = vec4(vec2(xy) * 2. - 1., 0, 1);
  26 }
  27 </script>
  28 <script id="fshader" type="x-shader/x-fragment">#version 300 es
  29 precision mediump float;
  30 out vec4 result;
  31 void main() {
  32   result = vec4(0, 1, 0, 1);
  33 }
  34 </script>
  35 <script>
  36 "use strict";
  37 description("Test no attribute shaders work as expected");
  38
  39 var wtu = WebGLTestUtils;
  40 var gl = wtu.create3DContext(undefined, undefined, 2);
  41
  42 function test() {
  43     debug("");
  44     var program = wtu.setupProgram(gl, ["vertex-shader", "fshader"], undefined, undefined, true);
  45     if (!program) {
  46         testFailed('Program compilation failed');
  47         return;
  48     }
  49
  50     gl.drawArrays(gl.TRIANGLES, 0, 6);
  51     wtu.checkCanvas(gl, [0, 255, 0, 255], "should be green", 0);
  52 };
  53
  54 if (!gl) {
  55     testFailed("context does not exist");
  56 } else {
  57     test();
  58 }
  59 var successfullyParsed = true;
  60 finishTest();
  61 </script>
  62 </body>
  63 </html>