> > 1. updmap-sys should handle dvipdfmx map files 
> >   (can't it do that? I need confirmation on this)
> 
> It has no special treatment for dvipdfmx, and therefore it cannot handle
> the entries with @ properly.  We would need a different output file for
> dvipdfmx and a special treatment of these entries, which may not end up
> in pdftex's or dvips' font map files.

In theory, we don't need to add fontmap entries for dvipdfmx because
dvipdfmx also read dvipdfm's map file.

The problem is CJK truetype fonts. Most of them does not contain oblique or
slanted (sometimes also bold) glyphs, and therefore dvipdfmx and ttf2pk use
special symbols on their map file to know how to generate oblique/slanted
letters from normal font. The map files can't be generated automatically
because the best-looking slanted angles are different for each font.
Therefore the upstream font package's author usually provides the individual
map files for pdftex, ttf2pk and dvipdfmx with the font.

If updmap-sys is used to for such fonts, it MUST NOT modify the map file of
dvipdfm because dvipdfmx also read it. As far as i know dvips and ps2pk
does not support truetype font. If it is true, updmap-sys must not modify
their map files, either. Furthermore, some fonts like Adobe's OTFs included
in acroread are supported by only dvipdfmx. In this case, updmap-sys must
not touch fontmap files for all the other programs.

I think using updmap-sys for dvipdfmx is not a good idea.


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