dom/canvas/test/reftest/webgl-clear-test.html

   1 <!DOCTYPE html>
   2 <meta charset='UTF-8'>
   3 <!--
   4 Clear the canvas to green to test that we get pixels to the screen.
   5
   6 If this fails, something is seriously wrong.
   7 -->
   8 <html>
   9
  10 <head>
  11   <script type='text/javascript' src='webgl-utils.js'></script>
  12   <script type='text/javascript'>
  13 'use strict';
  14
  15 function setStatus(text) {
  16   var elem = document.getElementById('status');
  17   elem.innerHTML = text;
  18 }
  19
  20 function runTest() {
  21   var canvas = document.getElementById('canvas');
  22
  23   var gl = initGL(canvas);
  24   if (!gl) {
  25     setStatus('WebGL context creation failed.');
  26     return;
  27   }
  28
  29   gl.clearColor(0.0, 1.0, 0.0, 1.0);
  30   gl.clear(gl.COLOR_BUFFER_BIT);
  31 }
  32   </script>
  33 </head>
  34
  35 <body onload='runTest();'>
  36   <canvas id='canvas' width='256' height='256'></canvas>
  37   <div id='status'></div>
  38 </body>
  39
  40 </html>