content/test/data/gpu/webgl_with_select_element.html

   1 <html>
   2 <head>
   3 <script type="text/javascript">
   4 var gl;
   5 // For some reason, when running this test in automated fashion, it
   6 // triggers the bug reliably if the first frame with back-to-back
   7 // events happens a certain number of frames into the test execution.
   8 var numFrames = 202;
   9 var intensity = 255;
  10 var contextWasLost = false;
  11
  12 function contextLostHandler(e) {
  13   contextWasLost = true;
  14 }
  15
  16 function draw() {
  17   if (--intensity == 0) {
  18     intensity = 255;
  19   }
  20
  21   gl.clearColor(intensity / 255.0, 0, 0, 1);
  22   gl.clear(gl.COLOR_BUFFER_BIT);
  23
  24   if (numFrames % 2 == 0) {
  25     // Toggle the state of the drop-down every other frame. Every now
  26     // and then, dispatch two events back to back. This really seems to
  27     // trigger the bug.
  28     var maxIteration = 1;
  29     if (numFrames % 6 == 0) {
  30       maxIteration = 2;
  31     }
  32     for (var ii = 0; ii < maxIteration; ++ii) {
  33       var e = document.createEvent('MouseEvent');
  34       e.initMouseEvent('mousedown', true, true, window);
  35       var s = document.getElementById('dropdown');
  36       s.dispatchEvent(e);
  37     }
  38   }
  39
  40   if (--numFrames > 0) {
  41     requestAnimationFrame(draw);
  42   } else {
  43     if (contextWasLost) {
  44       window.domAutomationController.send("FAILED");
  45     } else {
  46       window.domAutomationController.send("SUCCESS");
  47     }
  48   }
  49 }
  50
  51 function onLoad() {
  52   window.domAutomationController.send("LOADED");
  53
  54   var canvas = document.getElementById("canvas1");
  55   if (!canvas)
  56     return;
  57   canvas.addEventListener("webglcontextlost", contextLostHandler, false);
  58
  59   gl = canvas.getContext("webgl");
  60   if (!gl)
  61     return;
  62
  63   requestAnimationFrame(draw);
  64 }
  65 </script>
  66 </head>
  67 <body onload="onLoad()">
  68 <select id="dropdown">
  69   <option value="option1">option1</option>
  70   <option value="option2">option2</option>
  71   <option value="option3">option3</option>
  72   <option value="option4">option4</option>
  73 </select>
  74 <canvas id="canvas1" width="32px" height="32px">
  75 </canvas>
  76 </body>
  77 </html>