harfbuzz/TODO

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General fixes:
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- Instead of forming clusters immediately, only do it if we are reversing
the text. We'd need a separate bit to indicate cluster start then.
Right now, BTW, for non-native direction runs, we get the cluster wrong...
- Fix tt kern on/off and GPOS interaction
- Remove fixed-size feature/lookup arrays in hb-ot-map
- Use size_t in sanitize
- Use templates instead of macros for objects?
API issues to fix before 1.0:
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- Figure out how many .so objects, how to link, etc
- Shall y axis progress downward instead of upward?
- User-data support ala cairo
- Real subclassing support for vfunc vectors
- Add hb-cairo glue
- Fix blob, remove mutex, etc.
- Add sanitize API (since may affect blob API)
- Add glib GBoxedType stuff
API to add (maybe after 1.0):
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- Add hb_font_create_linear()?
- Add hb_shape_plan()/hb_shape_execute()
- Add query API for aalt-like features?
- SFNT api? get_num_faces?
- Full matrix instead of scale?
- Add segmentation API
- Add hb-fribidi?
Build fixes:
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- GNOME Bug 612402 - (hb-arm) HarfBuzz compilation fix for arm
Optimizations:
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- Avoid allocating blob objects internally for for_data() faces?
- Add caching layer to hb-ft