Fonttools

----------------------------

- [otData/otConverters] Added support for 'biased' PaintSweepGradient start/end angles
to match latest COLRv1 spec (2743).
- [varLib.instancer] Fixed bug in ``_instantiateFeatureVariations`` when at the same
time pinning one axis and restricting the range of a subsequent axis; the wrong axis
tag was being used in the latter step (as the records' axisIdx was updated in the
preceding step but looked up using the old axes order in the following step) (2733,
2734).
- [mtiLib] Pad script tags with space when less than 4 char long (1727).
- [merge] Use ``'.'`` instead of ``''`` in duplicate glyph names (2742).
- [gvar] Added support for lazily loading glyph variations (2741).
- [varLib] In ``build_many``, we forgot to pass on ``colr_layer_reuse`` parameter to
the ``build`` method (2730).
- [svgPathPen] Add a main that prints SVG for input text (6df779fd).
- [cffLib.width] Fixed off-by-one in optimized values; previous code didn't match the
code block above it (2963fa50).
- [varLib.interpolatable] Support reading .designspace and .glyphs files (via optional
``glyphsLib``).
- Compile some modules with Cython when available and building/installing fonttools
from source: ``varLib.iup`` (35% faster), ``pens.momentsPen`` (makes
``varLib.interpolatable`` 3x faster).
- [feaLib] Allow features to be built for VF without also building a GDEF table (e.g.
only build GSUB); warn when GDEF would be needed but isn't requested (2705, 2694).
- [otBase] Fixed ``AttributeError`` when uharfbuzz < 0.23.0 and 'repack' method is
missing (32aa8eaf). Use new ``uharfbuzz.repack_with_tag`` when available (since
uharfbuzz>=0.30.0), enables table-specific optimizations to be performed during
repacking (2724).
- [statisticsPen] By default report all glyphs (4139d891). Avoid division-by-zero
(52b28f90).
- [feaLib] Added missing required argument to FeatureLibError exception (2693)
- [varLib.merge] Fixed error during error reporting (2689). Fixed undefined
``NotANone`` variable (2714).

----------------------------

- Fixed typo in varLib/merger.py that causes NameError merging COLR glyphs
containing more than 255 layers (2685).

----------------------------

- [designspaceLib] Don't make up bad PS names when no STAT data (2684)

----------------------------

- [varStore/subset] fixed KeyError exception to do with NO_VARIATION_INDEX while
subsetting varidxes in GPOS/GDEF (a08140d).

----------------------------

- [instancer] When optimizing HVAR/VVAR VarStore, use_NO_VARIATION_INDEX=False to avoid
including NO_VARIATION_INDEX in AdvWidthMap, RsbMap, LsbMap mappings, which would
push the VarIdx width to maximum (4bytes), which is not desirable. This also fixes
a hard crash when attempting to subset a varfont after it had been partially instanced
with use_NO_VARIATION_INDEX=True.

----------------------------

- [instancer] Set RIBBI bits in head and OS/2 table when cutting instances and the
subfamily nameID=2 contains strings like 'Italic' or 'Bold' (2673).
- [otTraverse] Addded module containing methods for traversing trees of otData tables
(2660).
- [otTables] Made DeltaSetIndexMap TTX dump less verbose by omitting no-op entries
(2660).
- [colorLib.builder] Added option to disable PaintColrLayers's reuse of layers from
LayerList (2660).
- [varLib] Added support for merging multiple master COLRv1 tables into a variable
COLR table (2660, 2328). Base color glyphs of same name in different masters must have
identical paint graph structure (incl. number of layers, palette indices, number
of color line stops, corresponding paint formats at each level of the graph),
but can differ in the variable fields (e.g. PaintSolid.Alpha). PaintVar* tables
are produced when this happens and a VarStore/DeltaSetIndexMap is added to the
variable COLR table. It is possible for non-default masters to be 'sparse', i.e.
omit some of the color glyphs present in the default master.
- [feaLib] Let the Parser set nameIDs 1 through 6 that were previously reserved (2675).
- [varLib.varStore] Support NO_VARIATION_INDEX in optimizer and instancer.
- [feaLib] Show all missing glyphs at once at end of parsing (2665).
- [varLib.iup] Rewrite force-set conditions and limit DP loopback length (2651).
For Noto Sans, IUP time drops from 23s down to 9s, with only a slight size increase
in the final font. This basically turns the algorithm from O(n^3) into O(n).
- [featureVars] Report about missing glyphs in substitution rules (2654).
- [mutator/instancer] Added CLI flag to --no-recalc-timestamp (2649).
- [SVG] Allow individual SVG documents in SVG OT table to be compressed on uncompressed,
and remember that when roundtripping to/from ttx. The SVG.docList is now a list
of SVGDocument namedtuple-like dataclass containing an extra ``compressed`` field,
and no longer a bare 3-tuple (2645).
- [designspaceLib] Check for descriptor types with hasattr() to allow custom classes
that don't inherit the default descriptors (2634).
- [subset] Enable sharing across subtables of extension lookups for harfbuzz packing
(2626). Updated how table packing falls back to fontTools from harfbuzz (2668).
- [subset] Updated default feature tags following current Harfbuzz (2637).
- [svgLib] Fixed regex for real number to support e.g. 1e-4 in addition to 1.0e-4.
Support parsing negative rx, ry on arc commands (2596, 2611).
- [subset] Fixed subsetting SinglePosFormat2 when ValueFormat=0 (2603).