5c34acb94d
Contains the sketch and start of a stateless GSUB/GPOS/GDEF builder. Will be used by mtiLib, feaLib, and the future voltLib. Can also be used by clients to build these tables with much less pain.
106 lines
2.3 KiB
Plaintext
106 lines
2.3 KiB
Plaintext
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from fontTools.otlLib import builder as builder
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GDEF::mark filtering sets
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name::
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lookup_flags = builder.LOOKUP_FLAG_IGNORE_MARKS | builder.LOOKUP_FLAG_RTL
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smcp_subtable = builder.buildSingleSubstitute({'a':'a.scmp'})
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smcp_lookup = builder.buildLookup([smcp_subtable], lookup_flags=lookup_flags, mark_filter_set=int)
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lookups = [smcp_lookup, ...]
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scmp_feature = builder.buildFeature('smcp', [scmp_lookup], lookup_list=lookups)
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scmp_feature = builder.buildFeature('smcp', [0])
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features = [smcp_feature]
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default_langsys = builder.buildLangSys(set([scmp_feature]), requiredFeature=None, featureOrder=features)
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default_langsys = builder.buildLangSys(set([0]), requiredFeature=None)
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script =
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#GSUB:
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builder.buildSingleSubst({'a':'a.scmp'})
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builder.buildLigatureSubst({('f','i'):'fi'})
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builder.buildMultipleSubst({'a':('a0','a1')})
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builder.buildAlternateSubst({'a':('a.0','a.1')})
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class ChainSequence : namedtuple(['backtrack', 'input', 'lookahead')])
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pass
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ChainSequence(backtrack=..., input=..., lookahead=...)
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klass0 = frozenset()
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builder.buildChainContextGlyphs(
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[
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( (None, ('f','f','i'), (,)), ( (1,lookup_fi), (1,lookup_2) ) ),
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],
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glyphMap
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)
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builder.buildChainContextClass(
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[
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( (None, (2,0,1), (,)), ( (1,lookup_fi), (1,lookup_2) ) ),
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],
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klasses = ( backtrackClass, ... ),
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glyphMap
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)
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builder.buildChainContextCoverage(
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( (None, (frozenset('f'),frozenset('f'),frozenset('i')), (,)), ( (1,lookup_fi), (1,lookup_2) ) ),
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glyphMap
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)
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builder.buildExtension(...)
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#GPOS:
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device = builder.buildDevice()
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builder.buildAnchor(100, -200) or (100,-200)
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builder.buildAnchor(100, -200, device=device)
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builder.buildAnchor(100, -200, point=2)
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valueRecord = builder.buildValue({'XAdvance':-200, ...})
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builder.buildSinglePos({'a':valueRecord})
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builder.buildPairPosGlyphs(
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{
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('a','b'): (valueRecord1,valueRecord2),
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},
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glyphMap,
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, valueFormat1=None, valueFormat2=None
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)
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builder.buildPairPosClasses(
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{
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(frozenset(['a']),frozenset(['b'])): (valueRecord1,valueRecord2),
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},
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glyphMap,
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, valueFormat1=None, valueFormat2=None
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)
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builder.buildCursivePos(
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{
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'alef': (entry,exit),
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}
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glyphMap
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)
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builder.buildMarkBasePos(
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marks = {
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'mark1': (klass, anchor),
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},
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bases = {
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'base0': [anchor0, anchor1, anchor2],
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},
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glyphMap
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)
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builder.buildMarkBasePos(
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marks = {
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'mark1': (name, anchor),
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},
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bases = {
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'base0': {'top':anchor0, 'left':anchor1},
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},
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glyphMap
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)
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