harfbuzz/TODO

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General fixes:
=============
- Move feature parsing from util into the library
- 'const' for getter APIs? (use mutable internally)
- Fix TT 'kern' on/off and GPOS interaction (move kerning before GPOS)
- Do proper rounding when scaling from font space?
- Misc features:
* init/medi/fina/isol for non-cursive scripts
* vkna,hkna etc for kana, *jmo for hangul, etc
- Move non-native direction and normalization handling to the generic non-OT
layer, such that uniscribe and other backends can use.
- Uniscribe backend needs to enforce one direction only, otherwise cluster
values can confused the user.
API issues to fix before 1.0:
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- Rename all internal symbols (static ones even) to have _hb prefix?
- Add pkg-config files for glue codes (harfbuzz-glib, etc)
- Figure out how many .so objects, how to link, etc
- Add hb-cairo glue
- Add sanitize API (and a cached version, that saves result on blob user-data)
- Add glib GBoxedType stuff and introspection
API to add (maybe after 1.0):
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- Add Uniscribe face / font get API
- BCP 47 language handling / API (language_matches?)
- Add hb_face_get_glyph_count()?
- Add hb_font_create_linear()?
- Add hb_shape_plan()/hb_shape_execute()
- Add query API for aalt-like features?
- SFNT api? get_num_faces? get_table_tags? (there's something in stash)
- Add segmentation API
- Add hb-fribidi?
hb-view / hb-shape enhancements:
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- Add --width, --height, --auto-size, --align, etc?
- Add XML and JSON formats to hb-shape
Tests to write:
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- ot-layout enumeration API (needs font)
- Finish test-shape.c, grep for TODO
- Finish test-unicode.c, grep for TODO
Optimizations:
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- Avoid allocating blob objects internally for for_data() faces?
- Add caching layer to hb-ft?