Sync with 3.1.1

[LaurenzV]

Status	Commit message	HB Link
⚪️	[doc] Add missing version tags	Link
⚪️	Make the code able to compile with MSVC++ from Visual Studio 2015 (Version 14.0.25431.01	Link
⚪️	[repacker] fix heap use after free in repacker.	Link
⚪️	Rename HBGlyphID to HBGlyphID16	Link
⚪️	Add stub HBUINT15	Link
⚪️	Make the file UTF-8 again	Link
⚪️	[myanmar] Towards separating Myanmar from Indic table	Link
⚪️	[khmer] Towards separating Khmer from Indic table	Link
🟢	Add support for Pwo Karen / Ason Chin medial la	Link
⚪️	[set-digest] Use using instead of typedef	Link
⚪️	[subset] add closure_glyphs () method for MATH table	Link
⚪️	[subset] fix find_duplicate_features	Link
⚪️	[subset] Fix subset_offset_array adding unused space to serializer.	Link
⚪️	[subset] subset MATH table	Link
⚪️	[atomic] Cannot fail anymore	Link
⚪️	[mutex] Add hb_mutex_t std::mutex implementation	Link
⚪️	Add a debug message when offset overflow resolution fails.	Link
⚪️	[repacker] begin implementing the ability to isolate extension subtables.	Link
⚪️	[repacker] extract overflows processing into its own method.	Link
⚪️	[repacker] do extension subtable isolation before starting resolution attempts.	Link
⚪️	[repacker] recursively duplicate nodes during isolation.	Link
⚪️	[repacker] Add repacker test for subgraph isolation.	Link
⚪️	[repacker] put each 32 bit subgraph into it's own packing space.	Link
⚪️	[repacker] default space to 0.	Link
⚪️	[repacker] correctly update incoming_edges in duplicate.	Link
⚪️	[repacker] add a couple more complex isolation tests.	Link
⚪️	[repacker] add repacker isolation test on real font.	Link
⚪️	[repacker] reduce the bits used by order by 2 to give more bits to distance.	Link
⚪️	[repacker] handle a couple of duplication edge cases.	Link
⚪️	[repacker] s/0/HB_TAG_NONE	Link
⚪️	[getn-hb-version.py] Open old output in UTF-8 mode as well	Link
⚪️	[repacker] fix bug in subgraph isolation.	Link
⚪️	[subset] Fix bug in composite operation counting.	Link
⚪️	[repacker] begin storing each nodes parents.	Link
⚪️	[repacker] add space assignment based on connected components.	Link
⚪️	[repacker] when assigning each connected subgraph a space	Link
⚪️	[repacker] restrict 32 bit subgraph connected component search to only nodes reachable via directed links.	Link
⚪️	[subset] fuzzer fix: https://oss-fuzz.com/testcase-detail/6616166961905664	Link
⚪️	[repacker] Handle the case where a subgraph root has an incoming 32 and 16 bit edge.	Link
⚪️	[repacker] add the ability to move subgraphs from a shared space into their own space.	Link
🟢	[Unicode 14] Handle U+180F FVS4	Link
🟢	[USE] Remove overrides for hieroglyphic categories	Link
🟢	[USE] Update the data files	Link
🟢	[ot-shape] Tweak table order some more	Link
🟢	[indic] Apply 'calt' and 'clig' across syllable boundaries	Link
🟢	[test] Add test for harfbuzz/harfbuzz#3244	Link
🟢	[test] Add test for harfbuzz/harfbuzz#2757 (comment)	Link
⚪️	[repacker] when assigning spaces use post isolation node indices.	Link
⚪️	[repacker] add test for splitting spaces.	Link
⚪️	[repacker] Add additional splitting spaces test.	Link
⚪️	[repacker] Add repacker test that requires space splitting.	Link
⚪️	[repacker] refactor resolve overflow tests to use a helper.	Link
⚪️	[repacker] add missing fini for parents vector.	Link
⚪️	[repacker] remove clone buffer	Link
⚪️	[repacker] performance optimizations for topological sorting.	Link
🟢	Update comments for U+180F FVS4	Link
🟢	[USE] Only skip default ignorables within CCSes	Link
🟢	[USE] Merge the categories S and O	Link
🟢	[USE] Document customizations of USE categories	Link
⚪️	Merge pull request #3249 from harfbuzz/use-merge-s-o	Link
🟢	[USE] Categorize U+11046 BRAHMI VIRAMA as HALANT	Link
🟢	[USE] Insert dotted circles before lone viramas	Link
🟢	[USE] Categorize characters that only have AJT	Link
⚪️	[subset] code cleanup	Link
⚪️	[subset] Export header & archive when HB_BUILD_SUBSET	Link
⚪️	[subset] Refine the coding style	Link
⚪️	Fix Wbitwise-instead-of-logical warnings	Link
⚪️	Add a writeup of the overflow resolution algorithm in harfbuzz.	Link
⚪️	Err on -Wbitwise-instead-of-logical	Link
⚪️	[docs] Rename overflow_resolution to repacker	Link
⚪️	[repacker] use possibly updated root idx after isolate_subgraph.	Link
⚪️	[head] Add is_expanded() internally	Link
⚪️	[style] Use head->macStyle.isExtended in style fallback	Link
⚪️	[meson] Add graphite2 option and deprecate graphite	Link
⚪️	[subset] update COLRv1 table struct definitions	Link
⚪️	[subset] add DeltasetIndexMap struct definition	Link
⚪️	[subset] COLRv1: add ClipList/ClipRecord/ClipBox struct definition	Link
⚪️	[subset] COLRv1: update subset() method for new strutc ClipList and VarIdxMap	Link
⚪️	[subset] Move struct DeltaSetIndexMap into hb-ot-var-common.hh	Link
⚪️	Merge pull request #3248 from googlefonts/connected_components	Link
⚪️	Revert "[hb-directwrite] Don't load dwrit.dll dynamically"	Link
⚪️	Remove direct link to dwrite from meson scripts	Link
⚪️	[API] Add hb_buffer_[sg]et_not_found_glyph() and --not-found-glyph	Link
⚪️	[ci] Add CIFuzz integration	Link
⚪️	[subset] fuzzer fix: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40406	Link
⚪️	Document hb_ot_name_t values	Link
⚪️	docs: Add a link to the OpenType spec	Link
⚪️	Better round positions during scaling	Link
⚪️	[algs] Add hb_swap() ala	Link
⚪️	[vector] Add initializer_list constructor & tests	Link
⚪️	Revert "[vector] Add initializer_list constructor & tests"	Link
⚪️	[vector] Add initializer_list constructor & tests	Link
⚪️	Add a test font scale rounding behavior	Link
⚪️	[vector] Implement move assignment using swap	Link
⚪️	[vector] Add initializer from iterable	Link
⚪️	[vector] Move test code into separate file	Link
⚪️	[vector] Pre-allocate if iterator has random-access length	Link
⚪️	[vector] Add more tests	Link
⚪️	[set] Add standard the 5 standard methods & tests	Link
⚪️	[bit-set-invertible] Implement standard-5 methods & swap	Link
⚪️	[bit-set] Implement standard-5 methods plus swap	Link
⚪️	[vector] Use default constructor	Link
⚪️	[set] More default operators	Link
⚪️	Verbiage	Link
⚪️	[vector] Add swap() friend to hb_sorted_vector_t	Link
⚪️	[vector] Complete sorted_vector 5-methods	Link
⚪️	[array] Use default methods	Link
⚪️	[bimap] Simplify initialization	Link
⚪️	[set] Add successful check in swap()	Link
⚪️	[map] Add 5 methods	Link
⚪️	[algs] Include <initializer_list>	Link
⚪️	[map] Add initializer_list and swap()	Link
⚪️	[map] Add iterable constructor	Link
⚪️	Simplify swap()	Link
⚪️	[map] Try moving items when resizing	Link
⚪️	[algs] include	Link
⚪️	[meta] Use std::is_trivially_... instead of internal copies	Link
⚪️	[meta] Remove unused traits	Link
⚪️	[algs] Use std::move instead of hb_move()	Link
⚪️	[meta] Use std::forward instead of hb_forward()	Link
⚪️	[meta] Use more std type_traits	Link
⚪️	[meta] Use std::conditional instead of hb_conditional()	Link
⚪️	[meta] Add in-house impl of hb_is_convertible()	Link
⚪️	[meta] Remove otherwise-empty test-meta	Link
⚪️	Merge pull request #3278 from harfbuzz/more-std	Link
⚪️	[map] Fix copy assignment operator	Link
⚪️	[repacker] add 'virtual links' to the serializer.	Link
⚪️	[repacker] Add test for virtual links in the repacker.	Link
⚪️	[repacker] remove VirtualOffset struct.	Link
⚪️	[repacker] add more detailed comment about virtual links.	Link
⚪️	[subset] During LigatureSubstFormat1 subsetting always place Coverage last.	Link
⚪️	[subset] Don't assume FeatureList is sorted	Link
⚪️	[subset] fuzzer fix: https://oss-fuzz.com/testcase?key=6254792024915968	Link
⚪️	[subset] update subset goldens to fix tests.	Link
⚪️	[subset] use glyphset_gsub instead of glyphset for GDEF	Link
⚪️	[subset] Update test goldens for gdef.glyphset.	Link
⚪️	[subset] fix bug in (Chain)ContextFormat2	Link
⚪️	[map] Add INVALID_KEY and INVALID_VALUE	Link
⚪️	[subset] Fix fuzzer found memory leak.	Link
⚪️	[array] Remove defaulted destructor	Link
⚪️	3.1.0	Link
⚪️	[mutex] Try work around GCC cast-align error/warning	Link
⚪️	docs: Clarify a doc comment	Link
⚪️	Cosmetics: Avoid confusing indentation	Link
⚪️	Typo fix	Link
⚪️	3.1.1	Link

[LaurenzV]

Sorry for the many uncertainties, but the codebase is so complex, I'm not always able to tell what's relevant and what isn't. :( But I tried my best. Other than that, it's mostly done.

[RazrFalcon]

No problem. I know that it's hard to figure out where harfbuzz code is in rustybuzz. I'm looking for a solution.

As for changes, can you reduce the number of changes in scripts/gen-universal-table.py. No need to change formatting with dummy spaces.

Rename HBGlyphID to HBGlyphID16

Completely unrelated.

Add stub HBUINT15

Same. Anything that relates to TrueType parsing is out of scope. That's ttf-parser problem. And unless it affects output (tests are failing) you can ignore it.

[head] Add is_expanded() internally

Unrelated.

[subset] update COLRv1 table struct definitions

Unrelated. Anything with the [subset] tag is unrelated. But COLR in particular isn't used during shaping, afair, so it doesn't affect us.

[API] Add hb_buffer_[sg]et_not_found_glyph() and --not-found-glyph

I guess it can be safely ignored. It allows swapping the undef/0 glyph ID, but you can easily do this on the caller side.

Better round positions during scaling

We do not support scaling at all. Everything is in font units right now.

[LaurenzV]

Better now? I mostly copy pasted it from their repo, not sure why their formatting is so weird sometimes.

[RazrFalcon]

I ran my scripts through black, afair.

[RazrFalcon]

All good. Thanks.

Note that in case of rustybuzz I do not squash commits, so prefer not to have random/duplicate commits.