compositing/plugins/no-backing-store.html

<!DOCTYPE html>
<html>
<head>
  <style type="text/css" media="screen">
    embed {
      margin: 10px;
    }
  </style>
  <script type="text/javascript" charset="utf-8">
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.waitUntilDone();
    }

    function doTest()
    {
        // Need to wait for compositing layers to be updated. FIXME remove.
        window.setTimeout(function() {
            if (window.testRunner) {
                document.getElementById('layers').innerHTML = testRunner.layerTreeAsText();
                testRunner.notifyDone();
            }
        }, 0)
    }
    window.addEventListener('load', doTest, false);
  </script>
</head>
<body>
  
    <!-- Not layer-backed -->
    <embed type="application/x-webkit-test-netscape" width="100" height="100">

    <!-- Layer-backed, no need for backing store -->
    <embed type="application/x-webkit-test-netscape" width="100" height="100" drawingmodel="coreanimation">

    <!-- Both these need backing store -->
    <embed style="background-color: blue;" type="application/x-webkit-test-netscape" width="100" height="100" drawingmodel="coreanimation">
    <embed style="border: 1px solid black;" type="application/x-webkit-test-netscape" width="100" height="100" drawingmodel="coreanimation">

    <pre id="layers">Layer tree appears here in DRT.</pre>
</body>
</html>