dom/canvas/test/webgl-mochitest/test_depth_tex_lazy_clear.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <head>
   4   <meta charset='utf-8'/>
   5   <script src='/tests/SimpleTest/SimpleTest.js'></script>
   6   <link rel='stylesheet' href='/tests/SimpleTest/test.css'>
   7   <script src='webgl-util.js'></script>
   8 </head>
   9 <body>
  10 <script id='vs' type='x-shader/x-vertex'>
  11
  12 attribute vec2 aVertCoord;
  13
  14 void main(void) {
  15   gl_Position = vec4(aVertCoord, 0.0, 1.0);
  16 }
  17
  18 </script>
  19 <script id='fs' type='x-shader/x-fragment'>
  20
  21 precision mediump float;
  22 uniform sampler2D uTexUnit;
  23
  24 void main(void) {
  25   vec4 tex = texture2D(uTexUnit, vec2(0));
  26   gl_FragColor = vec4(tex.r, 1.0, 0.0, 1.0);
  27 }
  28
  29 </script>
  30 <script>
  31 'use strict';
  32
  33 var gl = null;
  34
  35 do {
  36   var c = document.createElement('canvas');
  37   gl = c.getContext('webgl');
  38   if (!gl) {
  39     todo(false, 'Get GL working here first.');
  40     break;
  41   }
  42
  43   var ext = gl.getExtension('WEBGL_depth_texture');
  44   if (!ext) {
  45     todo(false, 'WEBGL_depth_texture not supported, which is fine.');
  46     break;
  47   }
  48
  49   var prog = WebGLUtil.createProgramByIds(gl, 'vs', 'fs');
  50   if (!prog) {
  51     ok(false, 'Program linking should succeed.');
  52     break;
  53   }
  54
  55   var tex = gl.createTexture();
  56   gl.bindTexture(gl.TEXTURE_2D, tex);
  57   gl.texImage2D(gl.TEXTURE_2D, 0, gl.DEPTH_COMPONENT, 1, 1, 0, gl.DEPTH_COMPONENT,
  58                 gl.UNSIGNED_INT, null);
  59
  60   var uTexUnit = gl.getUniformLocation(prog, 'uTexUnit');
  61   gl.useProgram(prog);
  62   gl.uniform1i(uTexUnit, 0);
  63
  64   gl.drawArrays(gl.POINTS, 0, 1);
  65
  66   ok(!gl.getError(), 'Should have no errors.');
  67 } while (false);
  68
  69 ok(true, 'Test complete.');
  70
  71 </script>
  72 </body>
  73 </html>