[mpeg-OTspec] RE: [OpenType] RE: Proposal: deprecate ReqFeatureIndex

John Hudson john at tiro.ca
Thu Aug 23 17:46:07 CEST 2012

On 23/08/12 6:08 AM, Behdad Esfahbod wrote:

>  > But, as it stands, ReqFeatureIndex is at the very least ambiguously
> specified
>  > with respect to interaction with MS' multiple-pass model, as we've
> discussed
>  > on this list in the past.

> Fair enough. But the 'rclt' proposal does not address that either.

Only insofar as *none* of the registered layout feature descriptions 
address that: you need to go to the individual script specs to figure 
out in what order MS applies the features.

Personally, I'd favour <rclt> being processed at the same time as 
<calt>, i.e. in the final pass of 'typographic' features. The 
distinction between the two is only that <rclt> shouldn't be 
turn-off-able, and being able to control the interaction of the two 
features through lookup ordering seems to me desirable.



Tiro Typeworks        www.tiro.com
Gulf Islands, BC      tiro at tiro.com

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