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<!DOCTYPE HTML>
<html>
<head>
<title>Tests for MozAfterPaint</title>
<script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/paint_listener.js"></script>
<style>
#checkOpacityRepaint {
will-change: opacity;
}
#checkTransformRepaint {
will-change: transform;
}
div {
width: 100px;
height: 100px;
background: radial-gradient(ellipse at center, #87e0fd 0%,#53cbf1 40%,#05abe0 100%);
}
</style>
</head>
<body>
<div id="checkRepaint">
Check repaint without will-change
</div>
<div id="checkOpacityRepaint">
Check repaint with will-change
</div>
<div id="checkTransformRepaint">
Check repaint with will-change
</div>
</body>
<script>
var utils = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor).
getInterface(Components.interfaces.nsIDOMWindowUtils);
var initialPaintCount = 0;
function test_checkRepaint(next) {
var element = document.getElementById("checkRepaint");
waitForAllPaintsFlushed(function () {
utils.checkAndClearPaintedState(element);
element.style.opacity = "0.5";
waitForAllPaintsFlushed(function () {
var painted = utils.checkAndClearPaintedState(element);
// *** We check that this repaints because the test is relying
// on this property. If this is broken then this test wont
// be reliable check for will-change.
is(painted, true, "element should have been painted");
next();
});
});
}
function test_checkOpacityRepaint(next) {
var element = document.getElementById("checkOpacityRepaint");
waitForAllPaintsFlushed(function () {
utils.checkAndClearPaintedState(element);
element.style.opacity = "0.5";
waitForAllPaintsFlushed(function () {
var painted = utils.checkAndClearPaintedState(element);
// BasicLayers' heuristics are so that even with will-change:opacity,
// we can still have repaints.
if (utils.layerManagerType != "Basic") {
is(painted, false, "will-change checkOpacityRepaint element should not have been painted");
}
next();
});
});
}
function test_checkTransformRepaint(next) {
var element = document.getElementById("checkTransformRepaint");
waitForAllPaintsFlushed(function () {
utils.checkAndClearPaintedState(element);
element.style.transform = "translateY(-5px)";
waitForAllPaintsFlushed(function () {
var painted = utils.checkAndClearPaintedState(element);
// BasicLayers' heuristics are so that even with will-change:transform,
// we can still have repaints.
if (utils.layerManagerType != "Basic") {
is(painted, false, "will-change checkTransformRepaint element should not have been painted");
}
next();
});
});
}
SimpleTest.waitForExplicitFinish();
test_checkRepaint(function(){
test_checkOpacityRepaint(function(){
test_checkTransformRepaint(function(){
SimpleTest.finish();
});
});
});
</script>
</html>
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