[renovate]

This PR contains the following updates:

Package	Type	Update	Change
harfrust	dependencies	minor	0.14.0 → 0.15.0
read-fonts	dependencies	minor	0.45.1 → 0.46.0
skrifa	dependencies	minor	0.48.0 → 0.49.0

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Release Notes

harfbuzz/harfrust (harfrust)

v0.15.0

Compare Source

This release matches HarfBuzz v15.0.0,
and has an MSRV (minimum supported Rust version) of 1.85.

Breaking changes

• Update read-fonts to 0.46. Font and the rest of the font model that
  HarfRust re-exports come from that release.
• ShapePlanKey::new borrows the font for the lifetime of the key. A plan
  built for a font with lookup variations matches only keys at the same
  location.

Added

• Shape fonts with more than 65,535 glyphs, as specified by ISO/IEC
  14496-22:2026: GSUB and GPOS 1.2, GDEF 1.4, the 24-bit coverage and class
  definition formats, and the extended format of every lookup subtable.
• Apply FeatureVariations 1.1 lookup variations.
• Select feature variations at the default location, whose zero coordinates
  can satisfy a condition.
• Add opt-in tracing support with Buffer::set_message_function callbacks
  and hr-shape --trace output, including intermediate Unicode and glyph
  contents. Tracing also works without std and compiles out when disabled.
• Extend the C API with subsetting backed by Skera (the subset feature),
  glyph drawing and painting backed by Skrifa (draw and paint), HarfBuzz
  C++ ownership helpers, MATH and baseline queries, the set and map APIs,
  OpenType tag conversion, glyph collection for sets and lookups, face
  metadata and table enumeration, UTF-16 and Latin-1 buffer input, and batched
  nominal glyph callbacks.

Changed

• Parse each lookup once per font and keep it, with the font's GSUB, GPOS,
  GDEF and AAT tables, alongside the font data. Creating a ShaperFont reads
  no tables.
• Keep parsed morx, mort, kern and kerx subtables with the font's
  tables, and build each AAT table's cache when it is first applied. AAT
  shaping is 5 to 13% faster.
• Bound the preprocessing of a font's lookups by work and memory budgets that
  scale with the size of its layout tables and are shared by GSUB, GPOS and
  GDEF. Long contextual coverage arrays are read on demand.
• Reduce code size by replacing the standard library sorts with small heap
  and insertion sorts, sharing AAT class-set collection, and returning Option
  from buffer lookups instead of panicking.

Fixed

• Reject GSUB/GPOS lookups with an out-of-range lookupType instead of
  truncating it to u8. A malformed font could have e.g. type 3586 dispatched
  as MultipleSubst, expanding a single character into thousands of glyphs and
  costing up to a second per shape call. HarfBuzz rejects such tables.
• When a variation selector is replaced by the not-found variation selector glyph, reset that selector's Unicode properties instead of the first glyph's, matching HarfBuzz.
• Document that glyph IDs are not limited to u16: glyphs supplied by the caller, such as the not-found variation selector glyph, are passed through unchanged. Shaping tests now cover values above u16::MAX.
• Clamp built-in advances that variations take below zero, as HarfBuzz does.
  Custom font callbacks keep signed results.
• At the character cluster level, scan the whole range for its minimum cluster
  when setting unsafe flags.
• Process singleton clusters when producing safe-to-insert-tatweel flags.
• Merge monotone clusters before moving a Hangul tone mark ahead of its
  syllable.
• Round synthesized vertical origins down when a glyph is taller than the line
  by an odd number of units.
• Reorder Telugu length marks before virama and include USE symbol clusters
  in syllable reordering, matching HarfBuzz.
• Reject U+11A7 as a trailing Jamo when composing Hangul.
• Keep every above-base mark when moving a Thai Nikhahit.
• Skip single positioning format 2 for a coverage index past the value
  records, instead of reading past them.

googlefonts/fontations (read-fonts)

v0.46.0

Compare Source

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