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<!DOCTYPE HTML>
<script src="../resources/js-test.js"></script>
<style>
#scroller {
overflow: scroll;
height: 300px;
width: 300px;
background-color: red;
}
#scrolled {
height: 1000px;
width: 250px;
background-color: green;
}
</style>
<script>
jsTestIsAsync = true;
description('This test checks that changes to the compositor\'s settings are applied correctly.');
function isUsingCompositedScrolling(layer) {
layer = layer || JSON.parse(window.internals.layerTreeAsText(document));
if (layer.bounds[1] == 1000)
return true;
if (layer.children) {
for (var i = 0; i < layer.children.length; i++) {
if (isUsingCompositedScrolling(layer.children[i]))
return true;
}
}
return false;
}
window.onload = function() {
if (!window.internals) {
testFailed('This test requires window.internals');
return;
}
window.internals.settings.setPreferCompositingToLCDTextEnabled(false);
var stateBefore = isUsingCompositedScrolling();
window.internals.settings.setPreferCompositingToLCDTextEnabled(true);
var stateAfter = isUsingCompositedScrolling();
if (!stateBefore && stateAfter) {
testPassed('Composited scrolling became enabled.');
} else {
testFailed('Composited scrolling did not become enabled: ' + stateBefore + ", " + stateAfter);
}
finishJSTest();
};
</script>
<div id="scroller">
<div id="scrolled"></div>
</div>
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