Hello, I have a bunch of simple fonts for Arabic/Persian. These fonts lack Latin characters, etc., so I use fallbacks to work with them.
I just noticed that \high does not work with them, and have not been able
to pinpoint the issue. See the MWE below.
\starttypescript [serif][samim][name]
\definefontsynonym[Serif][Samim]
\stoptypescript
\definetypeface [myfont][rm] [serif][samim][default]
\setupbodyfont [myfont]
\starttext
%\definedfont[Samim*arabic]
۱۲۳\high{۴}۵۶.
\stoptext
I am using Persian digits because the font lacks Latin digits as I
mentioned. If I use the \definedfont approach, I don't see the character ۴
(argument of \high) at all. With the typescript approach, the same
character *is* typeset but is *not* raised; it appears on the baseline but
with smaller size.
Any ideas why this is happening? Could it be that some parameters, for
instance, \exheight are not properly set/read for this font? Actually, I
looked at the non-math fontdimens in syst-fnt.mkiv, and everything except
\slantperpoint (expected) and \exheight (awkward) is non-zero. I don't
know where \exheight comes from—perhaps from the height of glyph for 'x',
which the font lacks—however, \emheight is 12pt, although the font also
lacks a glyph for 'm'.
I am also attaching the font in case that helps.
Thanks,
Hossein
Samim.ttf
Description: application/font-ttf
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