Re: [Fontforge-devel] Something going on with onum feature

[Peter B. <ps...@vi...>]

George Williams wrote:
> When I did this, nothing happened because:
>   9 is in the Unicode Common script, so ff gives the metrics view
> 	the script "DFLT
>   But the 'onum' feature is attached to script latin and not to DFLT
>   So nothing happens
>      If you manually change the script to be "latn" it works.
> (There was an argument on the OpenType list about what scripts should be
> active for features that apply to common characters. I don't think any
> conclusion was reached, but what made sense to me was that these
> features should be active for all scripts (and languages) the font
> supported that might potentially use the glyphs and for the DFLT script
> just in case the glyphs were used in a script which was not in the font
> (ie. if your digits were embedded in a run of chinese characters from
> another font (so the script was han)) anyway you might consider making
> 'onum' active for 'grek{dflt}' and 'cyrl' as well)
>   
Okay, thanks for checking this out. What I've done is to add DFLT{dflt} 
(and several others, as you suggest) to the onum lookup, and that seems 
to fix the problem. Oddly, when I first made the change, saved, 
generated the font, it didn't seem to work; opening the font again and 
looking at the lookup list, onum was there, but with no scripts listed. 
When I opened the script list, FF put in a list of scripts correct for 
the font. I think perhaps what I had done wrong before was to 
idiotically include in the script list one (cyrl{dflt}) that wasn't in 
the font. I've got some things to learn here.

Peter Baker