[luatex] Misplaced letter

[Ulrike Fischer]

Am Wed, 25 Jul 2018 19:38:26 +0200 schrieb Hans Hagen:


>> The spacing on the left of the left lines looks a bit wrong. And the
>> numbers should be perhaps read 1234. But I don't know enough about
>> arabic fonts to be able to setup a comparision with context and with
>> the luatex-plain code. And so I can't decide if the problem is with
>> luaotfload/the fontloader or some missing feature in the font
>> definition. Perhaps you could try too and show your output?
> 
> in such a low level halign the direction is not known so one should 
> either add a \textdir TRT in the cell or you can try to add this to

When I added \textdir to the cell the content disappeared ;-).
(Perhaps it is outside the text margin or whatever). 
 
> nodes.simple_font-handler
> 
>          if not direction then
>              direction = tex.get("textdir") -- experiment
>          end
> 

This worked fine. 


>>> Be aware that Ulrike takes recent version from the context distribution
>>> so it might not be a drop in for texlive.
>> 
>> If Javier needs a newer fontloader we will have to push the patched
>> files and the newer fontloader to CTAN. luaotfload will break with
>> luatex 1.09 so at some time this will have to be done anyway. The
>> main point of my current tests is to be prepared for such a
>> situation ...
> 
> Isn't it more the reverse? That a more recent fontloader expects 1.09+
> (it also depends on what compatibility hacks you add)?

It seems still to work fine with luatex 1.07. 

I'm currently checking every few weeks if there is a new fontloader
and then use them to see if there are problems. If one breaks we can
take the last working version.  

But I need more testfiles ;-)
 

> (Btw, there have not that many changed in the font code recently, only 
> that generic lua font lookup stuff you wanted.)
> 
> (Also, @ version 1.10 luatex is more of less complete, apart from low 
> level improvements nothing fundamental will change / be added.)

does it still panic if two object are written? 
Did you find the source for Roberts problem with the "! error:
(vf): invalid DVI command"?

-- 
Ulrike Fischer 
https://www.troubleshooting-tex.de/