[XeTeX] possible bug in xdvipdfmx

[Ralf Stubner]

Pablo Rodríguez <oinos at web.de> writes:

> I'm afraid I cannot code, but at least (x)dvipdfmx handles Gentium
> TrueType right when the dvi file comes from Omega/Lambda using OFM files.
>
> This is really weird (from my ignorant point of view), since (x)dvipdfmx
> seem to have problems embedding TrueType fonts when using TFM files.
>
> Could it be something related to the way TFM files for TrueType and
> OpenType fonts are generated?
>
> (If XeTeX relies on ttf2tfm there might be a problem there, since it is
> unmaintained right now.)

I am not really sure what you mean with TFM here. When XeTeX (and
xdvipdfmx) use a font directly (native font), then there are no TFM
files involved. All the metrics information is taken directly from the
TTF/OTF file.

What I find odd is that the duplicate embedding only happens with
TrueType fonts, not with OpenType fonts. Or, to be more precise, it
happens for TrueType fonts and OpenType fonts using TrueType glyph
data. It does not happen for OpenType fonts using PostScript/CFF glyph
data. 

cheerio
ralf