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node_modules/fontkit/src/tables/GSUB.js
| 84 lines
| 2.8 KiB
| application/javascript
| JavascriptLexer
|
| r789 | import r from 'restructure'; | |||
| import {ScriptList, FeatureList, LookupList, Coverage, ClassDef, Device, Context, ChainingContext} from './opentype'; | ||||
| import {FeatureVariations} from './variations'; | ||||
| let Sequence = new r.Array(r.uint16, r.uint16); | ||||
| let AlternateSet = Sequence; | ||||
| let Ligature = new r.Struct({ | ||||
| glyph: r.uint16, | ||||
| compCount: r.uint16, | ||||
| components: new r.Array(r.uint16, t => t.compCount - 1) | ||||
| }); | ||||
| let LigatureSet = new r.Array(new r.Pointer(r.uint16, Ligature), r.uint16); | ||||
| let GSUBLookup = new r.VersionedStruct('lookupType', { | ||||
| 1: new r.VersionedStruct(r.uint16, {// Single Substitution | ||||
| 1: { | ||||
| coverage: new r.Pointer(r.uint16, Coverage), | ||||
| deltaGlyphID: r.int16 | ||||
| }, | ||||
| 2: { | ||||
| coverage: new r.Pointer(r.uint16, Coverage), | ||||
| glyphCount: r.uint16, | ||||
| substitute: new r.LazyArray(r.uint16, 'glyphCount') | ||||
| } | ||||
| }), | ||||
| 2: { // Multiple Substitution | ||||
| substFormat: r.uint16, | ||||
| coverage: new r.Pointer(r.uint16, Coverage), | ||||
| count: r.uint16, | ||||
| sequences: new r.LazyArray(new r.Pointer(r.uint16, Sequence), 'count') | ||||
| }, | ||||
| 3: { // Alternate Substitution | ||||
| substFormat: r.uint16, | ||||
| coverage: new r.Pointer(r.uint16, Coverage), | ||||
| count: r.uint16, | ||||
| alternateSet: new r.LazyArray(new r.Pointer(r.uint16, AlternateSet), 'count') | ||||
| }, | ||||
| 4: { // Ligature Substitution | ||||
| substFormat: r.uint16, | ||||
| coverage: new r.Pointer(r.uint16, Coverage), | ||||
| count: r.uint16, | ||||
| ligatureSets: new r.LazyArray(new r.Pointer(r.uint16, LigatureSet), 'count') | ||||
| }, | ||||
| 5: Context, // Contextual Substitution | ||||
| 6: ChainingContext, // Chaining Contextual Substitution | ||||
| 7: { // Extension Substitution | ||||
| substFormat: r.uint16, | ||||
| lookupType: r.uint16, // cannot also be 7 | ||||
| extension: new r.Pointer(r.uint32, GSUBLookup) | ||||
| }, | ||||
| 8: { // Reverse Chaining Contextual Single Substitution | ||||
| substFormat: r.uint16, | ||||
| coverage: new r.Pointer(r.uint16, Coverage), | ||||
| backtrackCoverage: new r.Array(new r.Pointer(r.uint16, Coverage), 'backtrackGlyphCount'), | ||||
| lookaheadGlyphCount: r.uint16, | ||||
| lookaheadCoverage: new r.Array(new r.Pointer(r.uint16, Coverage), 'lookaheadGlyphCount'), | ||||
| glyphCount: r.uint16, | ||||
| substitutes: new r.Array(r.uint16, 'glyphCount') | ||||
| } | ||||
| }); | ||||
| // Fix circular reference | ||||
| GSUBLookup.versions[7].extension.type = GSUBLookup; | ||||
| export default new r.VersionedStruct(r.uint32, { | ||||
| header: { | ||||
| scriptList: new r.Pointer(r.uint16, ScriptList), | ||||
| featureList: new r.Pointer(r.uint16, FeatureList), | ||||
| lookupList: new r.Pointer(r.uint16, new LookupList(GSUBLookup)) | ||||
| }, | ||||
| 0x00010000: {}, | ||||
| 0x00010001: { | ||||
| featureVariations: new r.Pointer(r.uint32, FeatureVariations) | ||||
| } | ||||
| }); | ||||