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font-size-adjust-metrics-override.html
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font-size-adjust-metrics-override.html
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<!DOCTYPE html>
<meta charset="utf-8">
<link rel="author" href="mailto:changseok@webkit.org">
<link rel="match" href="font-size-adjust-metrics-override-ref.html">
<link rel="help" href="https://www.w3.org/TR/css-fonts-5/#font-size-adjust-prop">
<meta name="assert" content="Tests the simultaneous use of font-size-adjust and metrics override descriptors of @font-face">
<title>Tests if font metric overrides reflect the adjustment of font-size-adjust.</title>
<style>
@font-face {
font-family: Ahem;
src: local(Ahem), url(/fonts/Ahem.ttf);
/* The default ascent and descent are 80% and 20%, respectively. */
ascent-override: 100%;
descent-override: 50%;
}
.size-adjusted {
font: 20px Ahem;
/* Scale up 200% since the Ahem font has an aspect ratio of 0.8 of x-height
to size. */
font-size-adjust: 1.6;
color: green;
position: absolute;
top: 10px;
left: 10px;
}
.overridden-ascent-ref {
display: inline-block;
background-color: green;
vertical-align: top;
width: 1em;
height: 1em; /* Scale a reference block to match the overridden ascent of 100%. */
}
.overridden-descent-ref {
display: inline-block;
background-color: green;
vertical-align: bottom;
width: 1em;
height: 0.5em; /* Scale a reference block to match the overridden descen of 50%. */
}
</style>
<!--
The three green rectangles below show ascent, character, and descent sizes
from the left. The ascent and descent are overridden by 100% and 50% of the
specified font size, respectively. The test applies font-size-adjust and font
metric overrides simultaneously to text. As we double the text size with
font-size-adjust, the ascent and descent override should scale accordingly
to double their size.
-->
<div class="size-adjusted">
<span class="overridden-ascent-ref"></span>X<span class="overridden-descent-ref"></span>
</div>