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<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="/fonts/baseline-diagnostic/baseline-diagnostic-font.css">
<script src="support/variant-class.js"></script>
<meta name="flags" content="image" />
<meta charset="utf-8">
<meta name="variant" content="?class=baseline">
<meta name="variant" content="?class=text-bottom">
<meta name="variant" content="?class=alphabetic">
<meta name="variant" content="?class=ideographic">
<meta name="variant" content="?class=middle">
<meta name="variant" content="?class=central">
<meta name="variant" content="?class=mathematical">
<meta name="variant" content="?class=hanging">
<meta name="variant" content="?class=text-top">
<style>
:root {
font: 200px/1 'BaselineDiagnostic';
}
#container {
position: relative;
}
img {
position: absolute;
left: calc(1rem);
width: 100px;
height: 100px;
/* Visualize top/bottom margins */
box-shadow:
inset 0px 10px 0px black,
inset 0px -30px 0px black;
--offset-synthesized-under: calc(100px - 30px);
--offset-synthesized-over: calc(0px + 10px);
--offset-synthesized-middle: calc((var(--offset-synthesized-under) + var(--offset-synthesized-over)) / 2);
}
/**
* Position the image (atomic inline) using its synthesized baselines, factoring in the expected
* block start and end margins (-10px and -30px, respectively):
* - Line-under: text-bottom, alphabetic, ideographic, baseline (in horizontal writing modes)
* - Midpoint: central, mathematical, baseline (in vertical writing modes)
* - Line-over: text-top, hanging
*/
.baseline img { inset-block-start: calc(1rem * var(--baseline-diagnostic-alphabetic) - var(--offset-synthesized-under)); }
.text-bottom img { inset-block-start: calc(1rem * var(--baseline-diagnostic-descent) - var(--offset-synthesized-under)); }
.alphabetic img { inset-block-start: calc(1rem * var(--baseline-diagnostic-alphabetic) - var(--offset-synthesized-under)); }
.ideographic img { inset-block-start: calc(1rem * var(--baseline-diagnostic-ideographic-under) - var(--offset-synthesized-under)); }
.middle img { inset-block-start: calc(1rem * var(--baseline-diagnostic-x-middle) - var(--offset-synthesized-middle)); }
.central img { inset-block-start: calc(1rem * var(--baseline-diagnostic-central) - var(--offset-synthesized-middle)); }
.mathematical img { inset-block-start: calc(1rem * var(--baseline-diagnostic-math) - var(--offset-synthesized-middle)); }
.hanging img { inset-block-start: calc(1rem * var(--baseline-diagnostic-hanging) - var(--offset-synthesized-over)); }
.text-top img { inset-block-start: calc(1rem * var(--baseline-diagnostic-ascent) - var(--offset-synthesized-over)); }
</style>
</head>
<body>
<span id="container">X<img src="/images/checkerboard.svg"></span>
</body>
</html>