chromium/third_party/blink/web_tests/external/wpt/css/css-masking/mask-image/mask-clip-4.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>CSS Masking: mask-clip: clip mask image</title>
    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
    <link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-mask-clip">
    <link rel="match" href="mask-clip-4-ref.html">
    <meta name="assert" content="content-box, padding-box, border-box, and
      magrin-box values of mask-clip should clip to the appropriate boxes.">
    <style type="text/css">
      svg {
        position: absolute;
        top: 10px;
        border: 1px solid black;
      }

      rect.mask {
        fill: blue;
        mask-origin: fill-box;
        mask-repeat: no-repeat;
        mask-image: url(support/50x50-opaque-blue.svg);
      }

      rect.content {
        mask-clip: content-box; /* should be the same as fill-box */
      }

      rect.padding {
        mask-clip: padding-box; /* should be the same as fill-box */
      }

      rect.border {
        mask-clip: border-box; /* should be the same as stroke-box */
      }

      rect.margin {
        mask-clip: margin-box; /* should be the same as stroke-box */
      }
    </style>
  </head>
  <body>
    <svg width="200" height="200" style="left: 10px;">
      <rect class="content mask" x="50" y="50" width="150" height="150"/>
    </svg>
    <svg width="200" height="200" style="left: 220px;">
      <rect class="padding mask" x="50" y="50" width="150" height="150"/>
    </svg>
    <svg width="200" height="200" style="left: 10px; top: 220px;">
      <rect class="border mask" x="50" y="50" width="100" height="100" stroke="green" stroke-width="20"/>
    </svg>
    <svg width="200" height="200" style="left: 220px; top: 220px;">
      <rect class="margin mask" x="50" y="50" width="100" height="100" stroke="green" stroke-width="20"/>
    </svg>
  </body>
</html>