[luatex] [Dev-luatex] luatex and harfbuzz 2.5.1

luigi scarso luigi.scarso at gmail.com
Tue Jun 18 22:45:18 CEST 2019

On Tue, Jun 18, 2019 at 9:23 PM Patrick Gundlach <patrick at gundla.ch> wrote:

> Hi Luigi,
> this sounds really great!
> Is there some documentation available how to access harfbuzz from Lua
> (jit) / FFI?
> Patrick
Well, look at
I have also used
to check
%% test2-latex.tex

{\deva क्रर्कि} % krarki
{\beng ক্রর্কি} % krarki
{\guru ਕ੍ਰਰ੍ਕਿ} % krarki
{\gujr ક્રર્કિ} % krarki
{\orya କ୍ରର୍କି} % krarki
{\taml கோ} % ko
{\telu క్రర్కి} % krarki
{\knda ಕ್ರರ್ಕಿ} % krarki
{\mlym ക്രര്കി} % krarki
{\sinh කෙ} % ke


I have renamed luatex 1.11.0 luatex-hb, build the lualatex format
 luatex-hb --ini '\input lualatex\dump
and run
 luatex-hb -fmt=lualatex.fmt  test2-latex.tex
(assuming texlive 2019,  all files & format in the same folder and of
course that you are able to compile from svn)

Seems to work. Well, it did it last time, not time to check it now,  busy
in other stuffs....

A few words on this task.
I have done it very  hurriedly (from commits luatex/branches/luatex-hb  one
can see  30 May 2019  15 Jun 2019 )
Even if  7 years ago I have done a lua binding to hb by swig and already  I
known the  work done by
 harftex, put simply,  was more easy to manage in 2 days.
The idea was  to check if was possible to keep the binary small and use
the  hb module on demand.
I dont know if it will possible to meet the constrains,
but with ffi  there is always an alternative (well there is if luaffi works
on every platforms, which is currently one of my big todo.. )

Harftex is a different project from luatex:
even if currently they  share several files,
harftex is free to modify the core of luatex to adapt it to harftex,
possibly reaching the size of xetex (~24M).
So, different projects, at the moment they share some code & some (not all)
luatex with hb is not a replacement of harftex (at least because at this
moment I dont know if hb will stay  in luatex).

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