[NTG-context] tlig feature sometimes does not work

Hans Hagen j.hagen at xs4all.nl
Sat Mar 13 09:12:46 CET 2021


On 3/13/2021 2:01 AM, Mohammad Hossein Bateni wrote:
> Umm... the fallbacks are correct.  My conclusion is that tlig does not 
> work when the character is not in the font itself.  Is that the case?  
> Is this a bug or a feature?
> 
> \starttext
>      
>   \definefontfallback[fall][dejavusansmono][0-0xfffff][check=yes,force=no]
>       \definefontsynonym[Test][file:Mikhak-Medium.ttf][fallbacks=fall]
>       \definefontfeature[tf][arabic][tlig=yes]
>       \definedfont[Test*tf]
>       foo--bar
>       [\char"2013]
>       [\char"2014]
> \stoptext
... or a misunderdstanding:

\starttext
 
\definefontfallback[myfallback][dejavuserif*default][0x02d,0x2013,0x2014][check=yes,force=yes]
 
\definefontsynonym[mytestfont][file:Mikhak-Medium.ttf][fallbacks=myfallback]
      \definedfont[mytestfont*arabic]
      foo--ofo---oof [\char"002D] [\char"2013] [\char"2014]
\stoptext

for a ligature to be made all the glyphs involved have to come from the 
same font

I think you should wikify this (also because the font once complete is a 
nice one to use in examples),

Hans


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