effect-reference-displacement-negative-scale-001.html

<!DOCTYPE html>
<title>SVG Filters: feDisplacementMap filter with negative scale</title>
<link rel="author" title="Fredrik Söderquist" href="mailto:[email protected]">
<link rel="help" href="https://drafts.fxtf.org/filter-effects/#FilterProperty">
<link rel="help" href="https://drafts.fxtf.org/filter-effects-1/#feDisplacementMapElement">
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=641854">
<link rel="match" href="reference/effect-reference-displacement-negative-scale-001-ref.html">
<meta name="assert" content="feDisplacementMap with a negative scale applies the displacement in the opposite direction.">

<div style="position: relative">
  <div style="position: absolute; top: 20px; left: 20px; width: 100px; height: 100px; background: green; filter: url(#displacementFilter);"></div>
</div>
<svg width="0" height="0">
  <filter id="displacementFilter" x="-0.2" y="-0.2" color-interpolation-filters="sRGB">
    <feFlood flood-color="black"/>
    <feDisplacementMap in="SourceGraphic" scale="-40" xChannelSelector="R" yChannelSelector="R"/>
  </filter>
</svg>

chromium/third_party/blink/web_tests/external/wpt/css/filter-effects/effect-reference-displacement-negative-scale-001.html