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<!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-2-ref.html">
<meta name="assert" content="Test checks whether setting mask origin to margin-box works correctly or not.">
<style type="text/css">
div.outer {
border: 1px solid black;
width: 125px;
height: 125px;
}
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 red;
border-width: 8px 2px 4px 6px;
padding: 6px 9px 12px 3px;
width: 60px;
height: 60px;
position: relative;
background-color: blue;
mask-image: url(support/50x50-opaque-blue.svg);
mask-repeat: no-repeat;
mask-origin: margin-box;
}
div.overflow {
position: absolute;
left: -10px;
top: -9px;
border: solid transparent;
border-width: 15px 13px 19px 13px;
width: 60px;
height: 60px;
background-color: purple;
}
#pos-left-auto { mask-position: left; }
#pos-left-bottom { mask-position: left bottom; }
#pos-right-top { mask-position: right top; }
#pos-right-bottom { mask-position: right bottom; }
</style>
</head>
<body>
<div class="outer">
<div class="inner" id="pos-left-auto">
<div class="overflow"></div>
</div>
</div>
<div class="outer">
<div class="inner" id="pos-left-bottom">
<div class="overflow"></div>
</div>
</div>
<div class="outer">
<div class="inner" id="pos-right-top">
<div class="overflow"></div>
</div>
</div>
<div class="outer">
<div class="inner" id="pos-right-bottom">
<div class="overflow"></div>
</div>
</div>
</body>
</html>
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