chromium/third_party/blink/web_tests/external/wpt/css/css-masking/mask-image/mask-position-1a-svg.html

<!DOCTYPE html>
<title>CSS Masking: mask-position: mask positioning, SVG content</title>
<link rel="help" href="https://www.w3.org/TR/css-masking-1/#the-mask-position">
<link rel="match" href="mask-position-1-ref.html">
<meta name="assert" content="Test checks whether positioning mask layer works correctly or not.">
<style type="text/css">
  rect.frame {
    x: -0.5px;
    y: -0.5px;
    width: 101px;
    height: 101px;
    stroke: black;
    fill: none;
  }

  rect.masked {
    width: 100px;
    height: 100px;
    fill: purple;
    mask-image: url(support/50x50-opaque-blue.svg);
    mask-repeat: no-repeat;
  }

  #masked1 { mask-position: right 20% bottom 70%; }
  #masked2 { mask-position: bottom 70% right 20%; }
  #masked3 { mask-position: right 30px bottom 25px; }
  #masked4 { mask-position: bottom 25px right 30px; }
</style>
<svg height="408">
  <g transform="translate(1 1)">
    <rect class="masked" id="masked1"/>
    <rect class="frame"/>
  </g>
  <g transform="translate(1 103)">
    <rect class="masked" id="masked2"/>
    <rect class="frame"/>
  </g>
  <g transform="translate(1 205)">
    <rect class="masked" id="masked3"/>
    <rect class="frame"/>
  </g>
  <g transform="translate(1 307)">
    <rect class="masked" id="masked4"/>
    <rect class="frame"/>
  </g>
</svg>