[luatex] otf fonts (ligatures, cache, etc.)

Yannis Haralambous yannis.haralambous at telecom-bretagne.eu
Tue Apr 7 15:26:03 CEST 2009

σ/ς are legitimately distinct characters!
In front of a period you can have both: φίλος. (= φίλος),  
φιλοσ. (= φιλοσοφία), so it must be up to the user to  
choose, the font should not interfere
If you want glyph-level transformations, there are at least two of  
them which are very important:

1) initial beta -> medial beta inside the word or at the end of the  
word (attention: this should not happen when writing numbers)

2) at paragraph begin (not *line* begin, but *paragraph* begin or  
*verse* begin) breathings should be outside the glyph bbox for capital  
Epsilon, Upsilon and partly outside the glyph box for capital Alpha,  
Omicron, Rho, Omega. This allows alignment at the level of the letter  
so that breathings and accents are like inside an \llap (with kerning).

Le 7 avr. 09 à 11:39, Elie Roux a écrit :

> Arno Trautmann a écrit :
>> Is that really a matter of the software? Anybody able to type greek
>> should use ς at the end instead of σ. (Like the ſ instead of s in  
>> black
>> letter).
> As it is a font feature, I guess users can expect to get the good  
> behaviour when they turn it on...
> -- 
> Elie

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