Support morx table

[srl295]

(could also support mort but it is obsolete.)

note:

• ICU implementation including http://bugs.icu-project.org/trac/ticket/10950

Just filing this to track.

[ebraminio]

As 14ff3cb

Now trak (mostly done, right?) and kerx #839 turn

[olivierberten]

Is there a way to choose between OT and AAT ? Some fonts have both and as far as I know, iOS supports only AAT while Windows supports only OT. This would be useful for testing fonts.

[behdad]

Umm. Not currently. Open a separate issue please. Not super excited about it though.

[brawer]

iOS does support OpenType.

[behdad]

Is there a way to choose between OT and AAT ? Some fonts have both and as far as I know, iOS supports only AAT while Windows supports only OT. This would be useful for testing fonts.

Reopening to add this control. I need it for testing the implementation as well.

My current thinking is to rename the default shaper to "auto". Then add aliases "ot", "aat", "ot-aat", and "aat-ot" that control which technology is used and in which order.

[behdad]

My current thinking is to rename the default shaper to "auto". Then add aliases "ot", "aat", "ot-aat", and "aat-ot" that control which technology is used and in which order.

Humm. It's kind of a pain to implement that right now. Maybe I just add an environment variable to affect the order and leave the rest as is. Maybe just rename "ot" shaper to "auto" or "harfbuzz" and make "ot" remain as an alias.

Comments?

[behdad]

I decided to just add a env-var option to prefer 'aat' over ot. HB_OPTIONS=aat.

[behdad]

Reopening again, as programmatic control is desired.