Author :
Werner Lemberg
Date :
2025-05-19 05:37:23
Hash :3dd7fc42 Message :[autofit] Speed up construction of reverse character map. (2/4)
This commit, together with the previous one, makes the startup of the
auto-hinter much faster.
Note, though, that the startup time for handling the diacritic database is
still rather large. For example, loading `arial.ttf` version 7.00 followed
by auto-hinting a first Latin glyph is still approx. three times slower
than before the introduction of the database (this is because function
`hb_ot_layout_lookup_get_glyph_alternates` is called very often).
* src/autofit/afshaper.c (scripts): Rename this array to...
(af_hb_scripts): ...this and export it.
(af_shaper_get_coverage_hb): Updated.
* src/autofit/afshaper.h: Updated.
* src/autofit/afadjust.c (af_reverse_character_map_new): Pass the current
script to `hb_ot_layout_collect_lookups` to make HarfBuzz check less
lookups while searching for glyph alternates.
Werner Lemberg