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Debbie Goldsmith 417635aa0b Support Hierarchical Variable Fonts (HVF) using Apple's 'libhvf' library. 
The new 'hvf' module is a thin wrapper around 'libhvf' with the necessary
boilerplate stuff to integrate it into FreeType.  Note that this currently
works on macOS >= 15.4 and iOS >= 18.4 only.

* include/freetype/tttags.h (TTAG_hvgl, TTAG_hvpm): New macros.
* include/freetype/config/ftmodule.h: Add `hvf_driver_class`.
* include/freetype/internal/fttrace.h: Add tracing tags `hvfdrv`, `hvfobjs`,
  and `hvfload`
* include/freetype/internal/services/svfntfmt.h (FT_FONT_FORMAT_HVF): New
  macro.

* modules.cfg (FONT_MODULES): Add `hvf` module.

* src/sfnt/sfobjc.s (sfnt_init_face): Handle 'hvgl' table.

* src/hvf/*: New files.
2026-03-11 17:36:10 +01:00
..
freetype Support Hierarchical Variable Fonts (HVF) using Apple's 'libhvf' library. 2026-03-11 17:36:10 +01:00
ft2build.h Update all copyright notices. 2026-03-11 17:27:07 +01:00