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| r = require 'restructure'
#########################
# Scripts and Languages #
#########################
LangSysTable = new r.Struct
reserved: new r.Reserved(r.uint16)
reqFeatureIndex: r.uint16
featureCount: r.uint16
featureIndexes: new r.Array(r.uint16, 'featureCount')
LangSysRecord = new r.Struct
tag: new r.String(4)
langSys: new r.Pointer(r.uint16, LangSysTable, type: 'parent')
Script = new r.Struct
defaultLangSys: new r.Pointer(r.uint16, LangSysTable)
count: r.uint16
langSysRecords: new r.Array(LangSysRecord, 'count')
ScriptRecord = new r.Struct
tag: new r.String(4)
script: new r.Pointer(r.uint16, Script, type: 'parent')
exports.ScriptList = new r.Array(ScriptRecord, r.uint16)
########################
# Features and Lookups #
########################
Feature = new r.Struct
featureParams: r.uint16 # pointer
lookupCount: r.uint16
lookupListIndexes: new r.Array(r.uint16, 'lookupCount')
FeatureRecord = new r.Struct
tag: new r.String(4)
feature: new r.Pointer(r.uint16, Feature, type: 'parent')
exports.FeatureList = new r.Array(FeatureRecord, r.uint16)
LookupFlags = new r.Bitfield r.uint16, [
'rightToLeft', 'ignoreBaseGlyphs', 'ignoreLigatures',
'ignoreMarks', 'useMarkFilteringSet', null, 'markAttachmentType'
]
exports.LookupList = (SubTable) ->
Lookup = new r.Struct
lookupType: r.uint16
flags: LookupFlags
subTableCount: r.uint16
subTables: new r.Array(new r.Pointer(r.uint16, SubTable), 'subTableCount')
markFilteringSet: r.uint16 # TODO: only present when flags says so...
return new r.LazyArray new r.Pointer(r.uint16, Lookup), r.uint16
##################
# Coverage Table #
##################
RangeRecord = new r.Struct
start: r.uint16
end: r.uint16
startCoverageIndex: r.uint16
Coverage = new r.VersionedStruct r.uint16,
1:
glyphCount: r.uint16
glyphs: new r.Array(r.uint16, 'glyphCount')
2:
rangeCount: r.uint16
rangeRecords: new r.Array(RangeRecord, 'rangeCount')
exports.Coverage = Coverage
##########################
# Class Definition Table #
##########################
ClassRangeRecord = new r.Struct
start: r.uint16
end: r.uint16
class: r.uint16
ClassDef = new r.VersionedStruct r.uint16,
1: # Class array
startGlyph: r.uint16
glyphCount: r.uint16
classValueArray: new r.Array(r.uint16, 'glyphCount')
2: # Class ranges
classRangeCount: r.uint16
classRangeRecord: new r.Array(ClassRangeRecord, 'classRangeCount')
exports.ClassDef = ClassDef
################
# Device Table #
################
exports.Device = new r.Struct
startSize: r.uint16
endSize: r.uint16
deltaFormat: r.uint16
##############################################
# Contextual Substitution/Positioning Tables #
##############################################
LookupRecord = new r.Struct
sequenceIndex: r.uint16
lookupListIndex: r.uint16
Rule = new r.Struct
glyphCount: r.uint16
lookupCount: r.uint16
input: new r.Array(r.uint16, -> @glyphCount - 1)
lookupRecords: new r.Array(LookupRecord, 'lookupCount')
RuleSet = new r.Array(new r.Pointer(r.uint16, Rule), r.uint16)
ClassRule = new r.Struct
glyphCount: r.uint16
lookupCount: r.uint16
classes: new r.Array(r.uint16, -> @glyphCount - 1)
lookupRecords: new r.Array(LookupRecord, 'lookupCount')
ClassSet = new r.Array(new r.Pointer(r.uint16, ClassRule), r.uint16)
exports.Context = new r.VersionedStruct r.uint16,
1: # Simple context
coverage: new r.Pointer(r.uint16, Coverage)
ruleSetCount: r.uint16
ruleSets: new r.Array(new r.Pointer(r.uint16, RuleSet), 'ruleSetCount')
2: # Class-based context
coverage: new r.Pointer(r.uint16, Coverage)
classDef: new r.Pointer(r.uint16, ClassDef)
classSetCnt: r.uint16
classSet: new r.Array(new r.Pointer(r.uint16, ClassSet), 'classSetCnt')
3:
glyphCount: r.uint16
lookupCount: r.uint16
coverages: new r.Array(new r.Pointer(r.uint16, Coverage), 'glyphCount')
lookupRecords: new r.Array(LookupRecord, 'lookupCount')
#######################################################
# Chaining Contextual Substitution/Positioning Tables #
#######################################################
ChainRule = new r.Struct
backtrackGlyphCount: r.uint16
backtrack: new r.Array(r.uint16, 'backtrackGlyphCount')
inputGlyphCount: r.uint16
input: new r.Array(r.uint16, -> @inputGlyphCount - 1)
lookaheadGlyphCount: r.uint16
lookahead: new r.Array(r.uint16, 'lookaheadGlyphCount')
lookupCount: r.uint16
lookupRecords: new r.Array(LookupRecord, 'lookupCount')
ChainRuleSet = new r.Array(new r.Pointer(r.uint16, ChainRule), r.uint16)
exports.ChainingContext = new r.VersionedStruct r.uint16,
1: # Simple context glyph substitution
coverage: new r.Pointer(r.uint16, Coverage)
chainCount: r.uint16
chainRuleSets: new r.Array(new r.Pointer(r.uint16, ChainRuleSet), 'chainCount')
2: # Class-based chaining context
coverage: new r.Pointer(r.uint16, Coverage)
backtrackClassDef: new r.Pointer(r.uint16, ClassDef)
inputClassDef: new r.Pointer(r.uint16, ClassDef)
lookaheadClassDef: new r.Pointer(r.uint16, ClassDef)
chainCount: r.uint16
chainClassSet: new r.Array(new r.Pointer(r.uint16, ChainRuleSet), 'chainCount')
3: # Coverage-based chaining context
backtrackGlyphCount: r.uint16
backtrackCoverage: new r.Array(new r.Pointer(r.uint16, Coverage), 'backtrackGlyphCount')
inputGlyphCount: r.uint16
inputCoverage: new r.Array(new r.Pointer(r.uint16, Coverage), 'inputGlyphCount')
lookaheadGlyphCount: r.uint16
lookaheadCoverage: new r.Array(new r.Pointer(r.uint16, Coverage), 'lookaheadGlyphCount')
lookupCount: r.uint16
lookupRecords: new r.Array(LookupRecord, 'lookupCount')
|