\fontrange and \currentfontscale

\fontrange and \currentfontscale

[Adam Lindsay]

Hi Hans, TeXnicians.

I thought I'd take another look at the \fontrange macros (commented) at
the beginning of font-ini. I think they might be one way of adapting
different optical sizes for Unicode fonts. 

I'm trying to work in the current scaling, but I run into some pure
dimension math and expansion problems that are way beyond my skills. I
was hoping someone might be able to give me a push in the right direction:

 \def\dodofontrange#1 #2 %
   {\ifdim\dimexpr(\currentfontscale\bodyfontsize) #2%
...

results in:
! Missing = inserted for \ifdim.
<to be read again> 
                   s
<argument> s
            a
\dodofontrange ...rentfontscale \bodyfontsize ) #2
                                                  #1\expandafter
\gobbleunti...

which I interpret as \currentfontscale only being expanded as "sa 1.200"
instead of a number. 

At this point I can only make progress by blind experimentation. Can
anyone else offer a clue?

cheers,
adam
-- 
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
 Adam T. Lindsay                      atl@comp.lancs.ac.uk
 Computing Dept, Lancaster University   +44(0)1524/594.537
 Lancaster, LA1 4YR, UK             Fax:+44(0)1524/593.608
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