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Preview of https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/reftests/svg/filter-invalidation-01.svg
<!--
Any copyright is dedicated to the Public Domain.
-->
<svg xmlns="http://www.w3.org/2000/svg" version="1.1"
class="reftest-wait">
<title>Test that the area that's covered by a filtered element is invalidated when it moves</title>
<filter id="filter">
<feGaussianBlur stdDeviation="0.1"/>
</filter>
<script type="text/javascript">//<![CDATA[
document.addEventListener("MozReftestInvalidate", doTest, false);
setTimeout(doTest, 4000); // fallback for running outside reftest
function doTest() {
document.getElementById("r").setAttribute("y", "-200%");
document.documentElement.removeAttribute('class');
}
//]]></script>
<rect width="100%" height="100%" fill="lime"/>
<rect width="100%" height="100%" fill="red" id="r" filter="url(#filter)"/>
</svg>