<!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>