[luatex] Using classic TeX 8-bit fonts in LuaTeX

Petr Olsak petr at olsak.net
Thu Dec 6 18:30:51 CET 2012

On Thu, 6 Dec 2012, Taco Hoekwater wrote:

> On 12/06/2012 05:17 PM, Petr Olsak wrote:
>>  luatex -fmt plain '\chardef\x=`č \show\x'
>> >  \x=\char"10D.
>>  <*> \chardef\x=`č \show\x
>>  (the letter after =` is ccaron, the one of letters from Czech alhpbet).
>>  We can see, that Unicode font is needed, because the character slot is
>>  "10D and this is greater than 255 and impossible to prit it by 8bit font.
> You asked about fonts, not about input encoding :)

This was not my question at begin of this thread.

> Using active characters could 'fix' your problem by reverting
> everything back to horrible 7bit mode, I assume.
> Best wishes,
> Taco

I know the solution with active characters, of course. But this implies 
many problems (\uppercase, \lccodes, letters in csnames etc.) thus we 
never used active characters for Czech/Slovak in our csplain format.

Luatex strictly requires UTF8 encoding on the input thus I mean that 
there exist some posibilities to control the conversion from this input to 
the TeX internal encoding.

Petr Olsak

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