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+<!doctype html>
+<title>CSS Test: Blur filter scaling.</title>
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="author" title="Mozilla" href="https://mozilla.org">
+<link rel="help" href="https://drafts.fxtf.org/filter-effects/#FilterProperty">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1224207">
+<link rel="match" href="filter-scaling-001-ref.html">
+<style>
+ * {
+ margin: 0;
+ padding: 0;
+ }
+
+ :root, #outer {
+ width: 100vw;
+ height: 100vh;
+ overflow: hidden;
+ }
+
+ #outer {
+ transform-origin: 0 0;
+ transform: scale(5);
+ }
+
+ #pad {
+ /* So that scaling by five it takes half of the viewport */
+ height: 10vh;
+ }
+
+ #filtered {
+ filter: url(#blur);
+ width: 100%;
+ height: 10vh;
+ background: green;
+ }
+</style>
+<div id="outer">
+ <div id="pad"></div>
+ <div id="filtered"></div>
+ <svg xmlns="http://www.w3.org/2000/svg" version="1.1">
+ <defs>
+ <filter id="blur">
+ <feGaussianBlur in="SourceGraphic" stdDeviation="0,0"></feGaussianBlur>
+ </filter>
+ </defs>
+ </svg>
+</div>