[luatex] \font primitive does not read otf file

[Philipp Gesang]

Hey Petr,

···<date: 2012-12-02, Sunday>···<from: Petr Olsak>···

>                                  The solution which loads some sty
> file and starts loading 18 another .sty files (!!) to solve one
> SIMPLE problem is not compatible with plainTeX philosophy.

then you might prefer the luatex-plain format, it has the
fontloader already built in, so no style files unless you require
them explicitly. This code just works, provided you have the
fonts:

    \font\lmr=file:lmroman10-regular at 12pt
    \font\cmur=file:cmunrm at 12pt

    {\lmr  \input knuth\par}
    {\cmur \input knuth\par}

    \bye

Regards
Philipp



> 
> So, I have perfromed some reverse engeneering to extract the lua
> code and there is a result:
> 
> --------------
> 
> \directlua{luatexbase = luatexbase or {}
>               luatexbase.luatexversion = \the\luatexversion\space
>               luatexbase.luatexrevision = \luatexrevision\space
>            require('luatexbase.attr')
>            require('luatexbase.cctb')
>            require('luatexbase.modutils')
>            oriwrite = texio.write_nl % I don't need to see unusual info
>            function texio.write_nl(...) end
>            require('luatexbase.mcb')
>            luatexbase.require_module('lualibs')
>            luatexbase.require_module('luaotfload')
>            texio.write_nl = oriwrite % return to original meaning
> }
> 
> \font\aa="[lmroman10-regular]"
> \aa  text
> 
> \end
> 
> -------------
> 
> Now, the \tracingall produces only 255 lines and the core of the
> problem is shown. Why this is not documented?
> 
> Petr Olsak
> 

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