css/css-masking/mask-image/mask-composite-2d.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Masking: mask-composite: compose vector image on SVG content</title>
<link rel="help" href="http://www.w3.org/TR/css-masking-1/#the-mask-composite">
<link rel="match" href="mask-composite-2-ref.html">
<meta name="assert" content="Test checks that vector-mask-image can be composed correctly by different mask-composite value.">
<style type="text/css">
  body {
    padding: 0;
    margin: 0;
  }

  rect {
    fill: blue;
    width: 100px;
    height: 100px;
    y: 10px;
    mask-image: url(support/blue-100x50-transparent-100x50.svg),
                url(support/transparent-100x50-blue-100x50.svg);
  }

  rect.add {
    x: 10px;
    mask-composite: add;
  }

  rect.subtract {
    x: 120px;
    mask-composite: subtract;
  }

  rect.intersect {
    x: 230px;
    mask-composite: intersect;
  }

  rect.exclude {
    x: 340px;
    mask-composite: exclude;
  }
</style>
<svg width="440">
  <rect class="add"/>
  <rect class="subtract"/>
  <rect class="intersect"/>
  <rect class="exclude"/>
</svg>