squashed-repaints.html | Explore in Territory

<!DOCTYPE html>
<html>
<head>
<script src="../../resources/run-after-layout-and-paint.js"></script>
<style>
div {
  position: absolute;
  z-index: 1;
  width: 100px;
  height: 100px;
}

.composited {
  will-change: transform;
  top: 60px;
  left: 60px;
  background-color: gray;
}

.overlap1 {
  top: 140px;
  left: 140px;
  background-color: blue;
}

.overlap2 {
  top: 160px;
  left: 160px;
  background-color: lime;
}

.overlap3 {
  top: 180px;
  left: 180px;
  background-color: magenta;
}

div:hover {
  background-color: green;
}

.green {
  background-color: green;
}

#testResults {
  display: none;
}

</style>
<script>
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.waitUntilDone();
    }

    function runTest()
    {
        if (!window.internals)
            return;
        runAfterLayoutAndPaint(executeTestCases);
    }

    function executeTestCases()
    {
        // Case 1
        document.getElementById('Case1').textContent = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_INVALIDATIONS);

        // Case 2
        internals.startTrackingRepaints(document);
        document.getElementById("A").style.backgroundColor = "green";
        document.getElementById('Case2').textContent = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_INVALIDATIONS);
        internals.stopTrackingRepaints(document);

        // Case 3
        internals.startTrackingRepaints(document);
        document.getElementById("A").style.backgroundColor = "blue";
        document.getElementById("B").style.backgroundColor = "green";
        document.getElementById('Case3').textContent = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_INVALIDATIONS);
        internals.stopTrackingRepaints(document);

        // Case 4
        internals.startTrackingRepaints(document);
        document.getElementById("B").style.backgroundColor = "blue";
        document.getElementById("C").style.backgroundColor = "green";
        document.getElementById('Case4').textContent = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_INVALIDATIONS);
        internals.stopTrackingRepaints(document);

        // Case 5
        internals.startTrackingRepaints(document);
        document.getElementById("C").style.backgroundColor = "blue";
        document.getElementById("A").style.backgroundColor = "green";
        document.getElementById('Case5').textContent = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_INVALIDATIONS);
        internals.stopTrackingRepaints(document);

        // Display the test results only after test is done so that it does not affect repaint rect results.
        document.getElementById('testResults').style.display = "block";

        if (window.testRunner)
            testRunner.notifyDone();
    }
</script>
</head>

<body onload="runTest()">

  <p>Basic repaint test for squashed layers. The entire squashing layer should not need repainting when
  only a portion of it is invalidated. Test interactively by using --show-paint-rects and hovering
  over elements to change their color.</p>

  <div class="composited"></div>
  <div id="A" class="overlap1"></div>
  <div id="B" class="overlap2"></div>
  <div id="C" class="overlap3"></div>

  <div id="testResults">
    CASE 1, original layer tree:
    <pre id="Case1"></pre>

    CASE 2, overlap1 changes color:
    <pre id="Case2"></pre>

    CASE 3, overlap1 and overlap2 change color:
    <pre id="Case3"></pre>

    CASE 4, overlap2 and overlap3 change color:
    <pre id="Case4"></pre>

    CASE 5, overlap3 and overlap1 change color:
    <pre id="Case5"></pre>
  </div>

</body>

</html>
chromium/third_party/blink/web_tests/compositing/squashing/squashed-repaints.html
