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Wed Jan 29 08:39:27 CET 2020

nd descender attributes?
Thanks!
Cheers,
Christopher

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<p class=3D"MsoNormal">Hi Folks,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p></o:p></p>
<p class=3D"MsoNormal">I have a question about the CFR ascender and descend=
er metrics.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p></o:p></p>
<p class=3D"MsoNormal">The CFR spec. has the following descriptions of asce=
nder & descender:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p></o:p></p>
<p class=3D"MsoNormal">    ascender =3D "string&qu=
ot;<o:p></o:p></p>
<p class=3D"MsoNormal">    Optional. The horizontal typograp=
hic ascent expressed as an integer.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p></o:p></p>
<p class=3D"MsoNormal">    descender =3D "string&q=
uot;<o:p></o:p></p>
<p class=3D"MsoNormal">    Optional. The horizontal typograp=
hic descent expressed as an integer.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p></o:p></p>
<p class=3D"MsoNormal">My understanding is that if these optional attribute=
s are missing from the CFR they are to be inherited from the first componen=
t font specified by either 'ComponentDef' or 'LanguagePreferredList' elemen=
t.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p></o:p></p>
<p class=3D"MsoNormal">The OpenType spec. has the following possible source=
s of the ascender and descender metrics:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p></o:p></p>
<p class=3D"MsoNormal">    hhea.Ascender & hhea.Des=
cender<o:p></o:p></p>
<p class=3D"MsoNormal">    OS/2.sTypoAscender & OS/2.sTy=
poDescender<o:p></o:p></p>
<p class=3D"MsoNormal">    OS/2.usWinAscent & OS/2.usWin=
Descent<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p></o:p></p>
<p class=3D"MsoNormal">From which of these OpenType attributes should a CFR=
 inherit its ascender and descender attributes?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p></o:p></p>
<p class=3D"MsoNormal">Thanks!<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p></o:p></p>
<p class=3D"MsoNormal">Cheers,<o:p></o:p></p>
<p class=3D"MsoNormal">Christopher<o:p></o:p></p>
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