<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>CSS Masking: mask-origin: mask positioning area</title>
    <link rel="author" title="Astley Chen" href="mailto:aschen@mozilla.com">
    <link rel="author" title="Mozilla" href="https://www.mozilla.org">
    <link rel="help" href="https://www.w3.org/TR/css-masking-1/#the-mask-origin">
    <link rel="match" href="mask-origin-1-ref.html">
    <meta name="assert" content="Test checks whether setting mask position area works correctly or not.">
    <style type="text/css">
      div.outer {
        border: 1px solid black;
        width: 100px;
        height: 100px;
      }

      div.inner {
        /*
         * content box: 60 x 60
         * padding box: 72 x 78
         * border  box: 80 x 90
         * margin  box: 86 x 94
         */
        margin: 1px 2px 3px 4px;
        border: solid transparent;
        border-width: 8px 2px 4px 6px;
        padding: 6px 9px 12px 3px;
        width: 60px;
        height: 60px;
        background-color: purple;
        mask-image: url(support/50x50-opaque-blue.svg);
        mask-repeat: no-repeat;
        mask-position: left top;
      }

      #border { mask-origin: border-box; }
      #padding { mask-origin: padding-box; }
      #content { mask-origin: content-box; }
    </style>
  </head>
  <body>
    <div class="outer"><div class="inner"></div></div>
    <div class="outer"><div class="inner" id="border"></div></div>
    <div class="outer"><div class="inner" id="padding"></div></div>
    <div class="outer"><div class="inner" id="content"></div></div>
  </body>
</html>
