visibility-image-layers-dynamic.html

<!DOCTYPE html>

<html>
<head>
  <style>
    .set {
      position: absolute;
      top: 8px;
    }
    .box {
      height: 100px;
      width: 100px;
    }
    
    .hidden {
      visibility: hidden;
    }
    
    .container {
      margin: 10px;
      padding: 20px;
    }
    .container.hidden {
      outline: 4px solid red;
    }
    
    .visible {
      visibility: visible;
    }
    .should-be-hidden {
      background-color: red !important;
    }
    .should-be-visible {
      background-color: green !important;
    }
    .composited {
      will-change: transform;
    }
    
    .visible-indicator {
      background-color: green;
    }

    .hidden-indicator {
      background-color: red;
    }
  </style>
  <script>
    if (window.testRunner) {
      testRunner.dumpAsText();
      testRunner.waitUntilDone();
    }

    function doTest()
    {
      if (window.testRunner)
        document.getElementById('layers1').innerText = internals.layerTreeAsText(document);

      window.setTimeout(function() {
        var firstImage = document.querySelectorAll('img')[0];
        firstImage.style.visibility = 'visible';

        if (window.testRunner)
          document.getElementById('layers2').innerText = internals.layerTreeAsText(document);

          window.setTimeout(function() {
            var secondContainer = document.querySelectorAll('.container')[1];
            secondContainer.style.visibility = 'visible';

            if (window.testRunner) {
              document.getElementById('layers3').innerText = internals.layerTreeAsText(document);
              testRunner.notifyDone();
            }
          }, 0);
      }, 0);
    }
    window.addEventListener('load', doTest, false);
  </script>
</head>
<body>
    <!-- Tests dynamic changes of visibility, using directly composited images. -->
    <div class="composited container"><img src="../resources/thiswayup.png" class="hidden composited box"></div>
    <div class="composited hidden container"><img src="../resources/thiswayup.png" class="composited box"></div>
    <div class="composited hidden container"><img src="../resources/thiswayup.png" class="visible composited box"></div>
  
<h2>Initial</h2>
<pre id="layers1"></pre>

<h2>After step 1</h2>
<pre id="layers2"></pre>

<h2>After step 2</h2>
<pre id="layers3"></pre>
</body>
</html>
chromium/third_party/blink/web_tests/compositing/visibility/visibility-image-layers-dynamic.html
