[lltx] luaotfload update

Khaled Hosny khaledhosny at eglug.org
Thu Oct 6 17:44:58 CEST 2011

On Thu, Oct 06, 2011 at 05:39:10PM +0200, Ulrike Fischer wrote:
> Am Thu, 6 Oct 2011 17:22:06 +0200 schrieb Khaled Hosny:
> >> Do you know why   "sub a b by c;" works fine (2 glyphs mapped to one
> >> glyph) while  "sub d by e;" (one to one) fails?
> > 
> > Are they both in the same feature/lookup block, if so then I recall it
> > is a bug in FontForge feature file import (one too many and one to one
> > are different internally and need to go to separate lookups, FontForge
> > should either complain and reject the file or do the split, but it seems
> > to just silently ignore the different entries. Moving each type to its
> > own block should fix it.)
> Yes, using a second feature "tsim" worked. 

You can use the same name as well. A feature is kind of a tag for a
number of lookups, though feature files abstract this greatly.

> >>>> Comments:
> >>>> 1. You must delete the temp-arial-tex-dash.lua etc files in the
> >>>> luatex-cache after you changed the fea-file or you won't see the
> >>>> changes.
> >>> 
> >>> I don't need this here, I recall this being fixed for some time now.
> >> 
> >> Yes I also recall that at some time it worked. But currently it
> >> doesn't work for me. I have to delete the temp-files. 
> >> 
> >> How does luaotfload decide if the temp-files should be regenerated?
> > 
> > The cashed file name is a hash for font name and any applied feature
> > files, here I have in my cache temp-dejavusans.lua and
> > temp-dejavusans-tex-dash.lua.
> I too have the two lua files. But if I change something in the fea
> file, e.g. add another sub command, - *without changing the name of
> the file* - temp-arial-tex-dash.lua is not recreated and the new sub
> command is ignored.  

Ah, I thought you are asking about activating/deactivating the feature,
now I remember the original issue. I fixed that by using file
timestamps, but I think this lost in the update. I'll check again.


 Khaled Hosny

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