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Support ISO OFF expanded GSUB, GPOS, and GDEF shaping - #495

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behdad wants to merge 27 commits into

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feat/extended-layout

Commits on Oct 5, 2026

[ot] Support expanded layout headers and full-width coverage
behdad
committed
6397480
[ci] Allow multiple syn versions in derive dependencies
behdad
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4d59866
[gsub] Apply ISO OFF single substitution formats 3 and 4
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df9690d
[gsub] Apply ISO OFF multiple substitution format 2
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b5a33e2
[gsub] Apply ISO OFF alternate substitution format 2
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4c24cb1
[gsub] Apply ISO OFF reverse chain substitution format 2
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c44d259
[gsub] Apply ISO OFF ligature substitution format 2
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c571c0c
[gpos] Apply ISO OFF single positioning formats 3 and 4
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1dce82e
[gpos] Apply ISO OFF cursive positioning format 2
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a44d555
[gpos] Reject pair classes outside the declared matrix
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ca068a1
[gpos] Apply ISO OFF class pair positioning format 4
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2233f91
[gpos] Apply ISO OFF glyph pair positioning format 3
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c57f011
[gpos] Apply ISO OFF mark-to-base positioning format 2
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526dbe0
[tests] Use the imported glyph-property flags
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2b0bbef
[gpos] Apply ISO OFF mark-to-mark positioning format 2
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f18becb
[gpos] Apply ISO OFF mark-to-ligature positioning format 2
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2338169
[ot] Apply ISO OFF coverage context format 6
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93519cf
[ot] Apply ISO OFF glyph context format 4
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0072bc9
[ot] Apply ISO OFF class context format 5
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6e13db1
[ot] Apply ISO OFF glyph chain context format 4
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69912e6
[ot] Apply ISO OFF class chain context format 5
behdad
committed
7eebd88
[ot] Evaluate ISO OFF feature-variation conditions
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5740aff
[ot] Use Fontations' shared condition evaluator
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2d4fffd
[ot] Apply ISO OFF lookup variations
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467a574
[ot] Refresh the extended-layout reader dependency
behdad
committed
dbd9370
[tests] Exercise LookupVariations shape-plan reuse
behdad
committed
a851c09
[gpos] Share cursive attachment across glyph-ID widths (#498)
behdad
authored
32c3024

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Support ISO OFF expanded GSUB, GPOS, and GDEF shaping - #495

Support ISO OFF expanded GSUB, GPOS, and GDEF shaping#495
behdad wants to merge 27 commits into
mainfrom
feat/extended-layout

Commits on Oct 5, 2026

[ot] Support expanded layout headers and full-width coverage

[ci] Allow multiple syn versions in derive dependencies

[gsub] Apply ISO OFF single substitution formats 3 and 4

[gsub] Apply ISO OFF multiple substitution format 2

[gsub] Apply ISO OFF alternate substitution format 2

[gsub] Apply ISO OFF reverse chain substitution format 2

[gsub] Apply ISO OFF ligature substitution format 2

[gpos] Apply ISO OFF single positioning formats 3 and 4

[gpos] Apply ISO OFF cursive positioning format 2

[gpos] Reject pair classes outside the declared matrix

[gpos] Apply ISO OFF class pair positioning format 4

[gpos] Apply ISO OFF glyph pair positioning format 3

[gpos] Apply ISO OFF mark-to-base positioning format 2

[tests] Use the imported glyph-property flags

[gpos] Apply ISO OFF mark-to-mark positioning format 2

[gpos] Apply ISO OFF mark-to-ligature positioning format 2

[ot] Apply ISO OFF coverage context format 6

[ot] Apply ISO OFF glyph context format 4

[ot] Apply ISO OFF class context format 5

[ot] Apply ISO OFF glyph chain context format 4

[ot] Apply ISO OFF class chain context format 5

[ot] Evaluate ISO OFF feature-variation conditions

[ot] Use Fontations' shared condition evaluator

[ot] Apply ISO OFF lookup variations

[ot] Refresh the extended-layout reader dependency

[tests] Exercise LookupVariations shape-plan reuse

[gpos] Share cursive attachment across glyph-ID widths (#498)