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<!DOCTYPE html>
<html>
<head>
<style>
.fixed {
position: fixed;
width: 10px;
height: 10px;
background-color: silver;
}
::-webkit-scrollbar {
width: 0px;
height: 0px;
}
</style>
<script>
if (window.testRunner) {
testRunner.dumpAsText();
testRunner.waitUntilDone();
}
if (window.internals && window.eventSender) {
window.internals.settings.setPreferCompositingToLCDTextEnabled(true);
addEventListener("load", function() {
document.getElementById("layerTree").innerText = internals.layerTreeAsText(document);
window.internals.setPageScaleFactor(0.5);
setTimeout(function() {
document.getElementById("layerTreeScaledDown").innerText = internals.layerTreeAsText(document);
window.internals.setPageScaleFactor(1.5);
setTimeout(function() {
document.getElementById("layerTreeScaledUp").innerText = internals.layerTreeAsText(document);
testRunner.notifyDone();
}, 0);
}, 0);
}, false);
}
</script>
</head>
<!-- Fixed position elements may skip compositing without a scrollable
ancestor. To make sure this test covers the intended scenario, we force the
body element to be tall, so that the FrameView is scrolling. -->
<body style="width: 4000px; height: 4000px;">
<div style="height: 1000px">
Not scaled:
<pre id="layerTree"></pre>
Scale=0.5:
<pre id="layerTreeScaledDown"></pre>
Scale=1.5:
<pre id="layerTreeScaledUp"></pre>
</div>
<!-- The layer tree should always be the same, regardless of page scale, except on platforms that enable the applyPageScaleFactorInCompositor Setting. -->
<!-- No layer in any case. -->
<div class="fixed" style="top: -100px"></div>
<!-- When applyPageScaleFactorInCompositor is true, this will have a composited layer when scaled down; no layer when not scaled or scaled up. -->
<div class="fixed"></div>
<div class="fixed" style="top: 0px; left: 1000px"></div>
<!-- When applyPageScaleFactorInCompositor is true, this will have composited layer when not scaled and scaled down; no layer scaled up. -->
<div class="fixed" style="top: 0px; left: 600px"></div>
<!-- Always has composited layer. -->
<div class="fixed" style="top: 0px; left: 0px"></div>
</body>
</html>
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