In a font I’m helping with, we have 3 named lookups in ccmp feature. The feature is organized as follows (actual rule details omitted for brevity):
lookup ccmp_arab_1 {
script arab;
sub ... # various rules here
} ccmp_arab_1;
lookup ccmp_arab_2 {
lookupflag UseMarkFilteringSet @hamzas;
sub ... # various rules here
} ccmp_arab_2;
lookup ccmp_arab_3 {
sub ... # various rules here
} ccmp_arab_3;
NB: These are not standalone lookups, but are in the ccmp feature.
The question is: what is the value of the lookupflag for ccmp_arab_3 lookup?
In Adobe’s OpenType™ Feature File Specification I read:
The lookupflag attribute defaults to 0 at the start of a feature or named lookup block.
which makes me think, since ccmp_arab_3 is a named lookup block, it should be reset to 0. But in fact it is the same as set in ccmp_arab_2.
(I know I can explicitly reset it to 0, but unless I’m misunderstanding something this seems like Glyphs doesn’t agree with the Adobe spec)
Bob
Glyphs version: 1009