On Fri, Jun 18, 2010 at 10:36:36AM +0200, Hans Hagen wrote:
> On 17-6-2010 11:54, Oliver Buerschaper wrote:
> >Dear wise guys,
> >
> >the other day I found myself caught in a trap that might be a frequent 
> >source of puzzlement for the casual ConTeXt user :-)
> >
> >I had replaced an OpenType font in the usual OS directory by a new version. 
> >Typesetting documents using that font produced surprising results... the PDF 
> >files were merrily messed up. I reckon I didn't pay attention to the 
> >interplay between font files and the LuaTeX cache... apparently ConTeXt was 
> >using the outdated font cache data together with the new font file since a 
> >few days later the problem was resolved once I had to regenerate the cache 
> >for other reasons. Only then did I notice I had also cured this font problem.
> >
> >Do you think it would be a good idea to store a checksum of the actual font 
> >file used while generating the cache?
> 
> no, as calculating the checksum is quite slow
> 
> normally context will detect a change in filesize so i wonder what
> went wrong at your end

File size is not reliable, I do frequently change fonts and context
doesn't reload the font, so I have to delete the cache by hand.

-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer
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