<!DOCTYPE html>
<html>
<head>
<title>filter function can be applied to a mask-image</title>
<link rel="help" href="https://drafts.fxtf.org/filter-effects-1/#funcdef-filter"/>
<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-mask-mode"/>
<link rel="author" title="Mike Bremford" href="http://bfo.com/" />
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht"/>
<style>
.test {
    position: relative;
    width: 100px;
    height: 100px;
    mask: filter(url(resources/green-transparent-100x100.png), drop-shadow(50px 0 0 black)) top left no-repeat alpha;
    -webkit-mask: filter(url(resources/green-transparent-100x100.png), drop-shadow(50px 0 0 black)) top left no-repeat alpha;
}
.content {
    width: 100px;
    height: 100px;
    background: green;
}
</style>
</head>
<body>
 <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
 <div class="test"><div class="content"></div></div>
</body>
</html>
