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15.0.0 source code.tar.gz 2026-10-22 39.0 MB
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README.md 2026-10-22 2.4 kB
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  • Support for the new tables and formats in the ISO Open Font Format (OFF) 5th edition is now enabled by default:
  • New tables and formats for 24-bit glyph indices (a.k.a. beyond-64k): the GLYF, LOCA, GVAR, MAXP, HHEA, HMTX, VHEA, and VMTX tables, cmap format 15, VORG version 2, COLR PaintGlyph2, the 24-bit GSUB, GPOS, GDEF, BASE, and JSTF formats, and extended TrueType Collection directories. A test font, NotoSans-beyond64k.ttf, which merges the Noto Sans fonts into a single font, can be found at: https://drive.google.com/file/d/1vMQI9mZMzfKIMHD96Iie40Oyo9NnnweH/view
  • Cubic curves in GLYF outlines.
  • The DMAP table, supported since 14.6.0.
  • Support instancing axes not referenced by retained VARC data. The latest VARC test fonts can be found at: https://github.com/notofonts/noto-cjk-varco/releases/tag/v0.005
  • The raster (libharfbuzz-raster), vector (libharfbuzz-vector), and GPU (libharfbuzz-gpu) libraries are no longer considered experimental. This means that the HarfBuzz API and ABI stability guarantees now apply to these libraries as well.
  • Fix possible use-after-free in hb_font_set_face(), which now resets the font functions to the defaults for the new face. The function is now deprecated. Use hb_font_create() instead.
  • Fix heap-buffer-overflow in hb_font_set_variation() after hb_font_set_face() switches to a face with more variation axes.
  • Subsetting CFF and CFF2 fonts whose subroutine calls are not preceded by an immediate subroutine number now fails instead of silently dropping the table, unless desubroutinizing.
  • Overriding atomic operators at compile time is not supported anymore.
  • Rewrite the number parser without Ragel, fixing various edge cases.
  • Harden the experimental WebAssembly shaper against malicious fonts.
  • Update the experimental Rust shaper (HarfRust) to 0.15, and the fontations font functions to read-fonts 0.46.
  • Update the kbts shaping backend to kb_text_shape 2.28g, and support font variations in it.
  • Various subsetting and instancing fixes, especially for CFF2, COLR, and variable layout tables.
  • Various fixes to the raster and vector libraries.
  • Various variable font fixes.
  • Various fixes for malformed fonts.
  • Various documentation fixes.

  • Various build and CI fixes.

  • Deprecated API: -hb_font_set_face()

Source: README.md, updated 2026-10-22