overlay_background_color_css_transitions.html

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This test is based on code written by Cameron Adams and imported from
  http://themaninblue.com/experiment/AnimationBenchmark/html
-->

<!doctype html>
<head>
<title>Benchmark - Overlay background-color Animation using CSS Transitions</title>
<style>
html {
    height: 100%;
}

body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

.overlay {
    position: absolute;
    width: 600px;
    height: 600px;
    will-change: transform;
    transition: background-color 1s linear;
    border: 1px solid black;
}
</style>
<script src="resources/perf_test_helper.js"></script>
<script>
window.measurementReady = false;
var maxOverlays = 500;
var colors = ["rgba(204, 0, 0, 0.5)", "rgba(255, 204, 0, 0.5)", "rgba(170, 255, 0, 0.5)"
              , "rgba(0, 153, 204, 0.5)", "rgba(25, 76, 153, 0.5)", "rgba(102, 25, 153, 0.5)"];

var testRunning = true;
var overlays = [];

window.onload = function () {
    // Create the overlays
    for (var i = 0; i < maxOverlays; i++) {
        var overlay = new Overlay();
        overlay.start();
        overlays.push(overlay);
    }

    window.measurementReady = true;
}

function Overlay()
{
    // Create visual element for the overlay
    var domNode = document.createElement('div');
    domNode.classList.add('overlay');
    document.body.appendChild(domNode);

    // Set color of element
    domNode.style.backgroundColor = colors[Math.floor(PerfTestHelper.random() * colors.length)];

    function destroy()
    {
        document.body.removeChild(domNode);
    }

    function changeBackgroundColor() {
        if (!testRunning)
            return;
        domNode.style.backgroundColor = colors[Math.floor(PerfTestHelper.random() * colors.length)];
        setTimeout(changeBackgroundColor, 1000);
    }

    function start() {
        // Set timeout is used to ensure the transition-property value gets a chance to register on the element.
        setTimeout(changeBackgroundColor, 0);
    }

    this.start = start;
    this.destroy = destroy;
}
</script>
</head>
</html>
chromium/tools/perf/page_sets/tough_animation_cases/overlay_background_color_css_transitions.html
