[OS X TeX] question about the geometry package

[Bruno Voisin]

Le 22 oct. 05 à 00:53, Morten Høgholm a écrit :

> I made it a little better in my suggestion to the author. When  
> detecting drivers first check if the user already gave one. Only if  
> no driver is specified try to detect one. Basically something like  
> this:
>
> \def\Gm at checkdrivers{%
>    \ifx\Gm at driver\@empty % no driver specified by user, detect
>      \ifpdf
>        \Gm at setdriver{pdftex}%
>      \else
>        \Gm at setdriver{dvips}%
>      \fi
>      \ifx\VTeXversion\@undefined\else
>        \ifnum\OpMode=\@ne
>          \Gm at setdriver{vtex}%
>        \else
>          \ifnum\OpMode=\tw@
>            \Gm at setdriver{vtex}%
>          \fi
>        \fi
>      \fi
>    \fi % end of detection
>    \ifx\Gm at driver\Gm at dvips
>      \Gm at specialtrue
>    \else
>      \ifx\Gm at driver\Gm at dvipdfm
>         \Gm at specialtrue
>      \fi
>    \fi}%

I haven't followed this thread closely, but considering automatic  
driver selection: it might be nice to add another check for XeTeX  
<http://scripts.sil.org/xetex/>, based on \XeTeXversion. For example,  
the adapted color.cfg for XeTeX contains:

% Select an appropriate default driver
\begingroup
   \chardef\x=0\relax
   % check pdfTeX
   \@ifundefined{pdfoutput}{}{%
     \ifcase\pdfoutput
     \else
       \chardef\x=1\relax
     \fi
   }%
   % check VTeX
   \@ifundefined{OpMode}{}{%
     \chardef\x=2\relax
   }%
   % check XeTeX
   \@ifundefined{XeTeXversion}{}{%
     \chardef\x=3\relax
   }%
\expandafter\endgroup

In that case, for the geometry package the appropriate option would  
be dvipdfm, since the latest versions of XeTeX support the dvipdfm  
papersize \special.

Bruno Voisin------------------------- Info --------------------------
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