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<base href="https://bugs.documentfoundation.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - Wrong OpenType tag for fractions in "font properties" dialog"
href="https://bugs.documentfoundation.org/show_bug.cgi?id=126754">126754</a>
</td>
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<th>Summary</th>
<td>Wrong OpenType tag for fractions in "font properties" dialog
</td>
</tr>
<tr>
<th>Product</th>
<td>LibreOffice
</td>
</tr>
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<th>Version</th>
<td>6.3.0.4 release
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>UNCONFIRMED
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Writer
</td>
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<th>Assignee</th>
<td>libreoffice-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>rgb.mldc@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="http://bugs.documentfoundation.org/attachment.cgi?id=153209" name="attach_153209" title="Font features menu">attachment 153209</a> <a href="http://bugs.documentfoundation.org/attachment.cgi?id=153209&action=edit" title="Font features menu">[details]</a></span>
Font features menu
OpenType defines two kinds of fractions, the "diagonal" fraction with the +frac
tag and the "nut" fraction with the tag +afrc
Character → Font tab → Features, LibreOffice offers "frac=1" for diagonal
fractions and "frac=2" for nut fractions, which is wrong: those are Graphite
tags, not OpenType tags, and they are valid only for Linux Libertine G and
Linux Biolinum G fonts (Graphite tags are not standardized).
Because of their similarity, LibreOffice understand both, "frac=1" and "frac=2"
as just "frac" which apply the diagonal OpenType fraction.
This wrong preset also generates problems with font preview when using some
fonts, because on 6.3 the "frac=1" is applied even if not explicitly selected
by the user, as you can see in the attached screenshot.
For the screenshot I'm using a font called Sukhumala that offer both, diagonal
and (some) nut fractions:
<a href="http://www.softerviews.org/Fonts.html#Sukhumala">http://www.softerviews.org/Fonts.html#Sukhumala</a>
Clearly, "frac=2" does not work to get nut fractions with Sukhumala, but "afrc"
does.</pre>
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