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Thanks for figuring out this problem in Gentium Plus. If there are
other Greek characters recomposing wrong I'd appreciate hearing
about them so we can work on getting them right for the next
release.<br>
Lorna<br>
SIL International<br>
<br>
<div class="moz-cite-prefix">-------- Original Message --------<br>
Subject: Re: [XeTeX] difficulty with ancient greek diacriticals in
XeTeX with Gentium Plus<br>
From: Georg Duffner <g.duffner@gmail.com><br>
To: XeTeX (Unicode-based TeX) discussion. <xetex@tug.org><br>
Date: 7/18/2013 4:53 PM<br>
</xetex@tug.org></g.duffner@gmail.com></div>
<blockquote cite="mid:51E863E6.7000207@gmail.com" type="cite">The
problem seems to be incomplete recomposition in the font.
<br>
Canonically, your precomposed ἆ decomposes to alpha + uni0313 +
uni0342 where uni0313 is "combining comma above" and uni0342
"greek perispomeni". This is also, what should result from
decomposed input. Gentium Plus however seems to expect uni1FBF
"greek psili" instead of uni0313. The sequence uni1FBF+uni0342 is
replaced with uni1FCF "greek psili and perispomeni" by opentype
feature "ccmp" in that font, which gets positioned correctly and
looks identical to the precomposed glyph.
<br>
<br>
uni1FBF and uni1FCF shouldn’t be used as combining characters but
it happens nevertheless, it might be worth reporting a bug to SIL.
<br>
</blockquote>
<br>
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