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Fix the known JPEG, COLRv1, VARC and morx bugs - #293

Merged

albedosehen merged 13 commits into

mainfrom

fix/known-bugs-0.24

Oct 4, 2026

Merged

Fix the known JPEG, COLRv1, VARC and morx bugs#293
albedosehen merged 13 commits into
mainfrom
fix/known-bugs-0.24

Commits on Oct 4, 2026
- Decode progressive JPEG AC coefficients at their zig-zag index
  albedosehen
  committed
  345598a
- Decode progressive JPEG AC refinement scans
  albedosehen
  committed
  de24a76
- Round COLRv1 paint and VARC axis coords to F2DOT14
  albedosehen
  committed
  e4a85a7
- Read VARC component records and delta sets as HarfBuzz does
  albedosehen
  committed
  c80920c
- Gate VARC components on conditions and honor RESET_UNSPECIFIED_AXES
  albedosehen
  committed
  2501ea7
- Read morx contextual substitution tables as an unsized offset array
  albedosehen
  committed
  47f4dab
- Form morx ligatures as HarfBuzz does, a component set twice once
  albedosehen
  committed
  1d43fa7
- Apply morx substitutions to glyph 1
  albedosehen
  committed
  9f6142a
- Check VARC and morx against HarfBuzz on crafted fixtures
  albedosehen
  committed
  10724be
- Reject a second frame in a JPEG stream
  albedosehen
  committed
  22355b8
- Back a JPEG frame by its scan data and cap it at 2^24 pixels
  albedosehen
  committed
  d811ab6
- Bound VARC condition and delta work per glyph
  albedosehen
  committed
  4aeb2a7
- Cap JPEG frames at 2^22 pixels
  albedosehen
  committed
  4dd52b3