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Test Info:
<!DOCTYPE html>
<html class="reftest-wait"
reftest-displayport-x="0"
reftest-displayport-y="0"
reftest-displayport-w="800"
reftest-displayport-h="1000">
<title>Scrolling over inactive layers shouldn't repaint their contents even if both the top and the bottom edge of the inactive layers are offscreen</title>
<style>
html, body {
margin: 0;
padding: 0;
}
.outer {
border: 1px solid black;
width: 100px;
height: 2000px;
margin-right: 20px;
padding-top: 200px;
float: left;
}
.opacity {
opacity: 0.5;
}
.transform {
transform: translateX(1px);
}
.filter {
filter: url(#filter);
}
.mask {
mask: url(#mask);
}
.reftest-no-paint {
height: 50px;
border: 1px solid lime;
}
</style>
<svg height="0">
<defs>
<filter id="filter" filterUnits="objectBoundingBox"
x="0%" y="0%" width="100%" height="100%"
color-interpolation-filters="sRGB">
<feMerge><feMergeNode/><feMerge>
</filter>
<mask id="mask" maskContentUnits="objectBoundingBox">
<rect x="0" y="0" width="1" height="1" fill="white"/>
</mask>
</defs>
</svg>
<div class="outer opacity">
<div class="reftest-no-paint"></div>
</div>
<div class="outer transform">
<div class="reftest-no-paint"></div>
</div>
<div class="outer filter">
<div class="reftest-no-paint"></div>
</div>
<div class="outer mask">
<div class="reftest-no-paint"></div>
</div>
<script>
function doTest() {
document.documentElement.scrollTop = 100;
document.documentElement.removeAttribute("class");
}
document.documentElement.scrollTop = 50;
document.addEventListener("MozReftestInvalidate", doTest);
</script>