[mpeg-OTspec] Registering new GPOS features?

[John Hudson]

On 22-04-2018 22:14, Ken Lunde lunde at adobe.com [mpeg-OTspec] wrote:
>
> Vladimir,
>
> When is the next opportunity for registering new features? I ask, 
> because I may have a couple in the proverbial hopper:
>
> https://blogs.adobe.com/CCJKType/2018/04/contextual-spacing.html
>

 From that discussion paper:

     'Our meeting ended with lunch at PHB, along with the idea to 
register two new OpenType
     GPOS (Glyph Positioning) features that would be tentatively tagged 
'cspc' (“Contextual
     Spacing”) and 'vcsp' (“Vertical Contextual Spacing”), and which 
would behave like the 'kern'
     and 'vkrn' in that they adjust inter-glyph spacing.
     ...
     'In order to be able to test in environments that do not support 
arbitrary OpenType
     features, the example font includes the lookups for the 'cspc' and 
'vcsp' GPOS features
     in the 'kern' and 'vkrn' GPOS features, respectively.'

Can you explain why you want to register two new features for this, 
rather than just putting the lookups in the 'kern' and 'vkrn' features 
as in this demonstration?

JH

-- 

John Hudson
Tiro Typeworks Ltd    www.tiro.com
Salish Sea, BC        tiro at tiro.com

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