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import r from 'restructure';
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import { LookupTable, StateTable1 } from './aat';
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let ClassTable = new r.Struct({
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length: r.uint16,
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coverage: r.uint16,
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subFeatureFlags: r.uint32,
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stateTable: new StateTable1
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});
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let WidthDeltaRecord = new r.Struct({
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justClass: r.uint32,
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beforeGrowLimit: r.fixed32,
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beforeShrinkLimit: r.fixed32,
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afterGrowLimit: r.fixed32,
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afterShrinkLimit: r.fixed32,
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growFlags: r.uint16,
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shrinkFlags: r.uint16
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});
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let WidthDeltaCluster = new r.Array(WidthDeltaRecord, r.uint32);
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let ActionData = new r.VersionedStruct('actionType', {
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0: { // Decomposition action
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lowerLimit: r.fixed32,
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upperLimit: r.fixed32,
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order: r.uint16,
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glyphs: new r.Array(r.uint16, r.uint16)
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},
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1: { // Unconditional add glyph action
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addGlyph: r.uint16
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},
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2: { // Conditional add glyph action
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substThreshold: r.fixed32,
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addGlyph: r.uint16,
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substGlyph: r.uint16
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},
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3: {}, // Stretch glyph action (no data, not supported by CoreText)
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4: { // Ductile glyph action (not supported by CoreText)
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variationAxis: r.uint32,
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minimumLimit: r.fixed32,
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noStretchValue: r.fixed32,
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maximumLimit: r.fixed32
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},
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5: { // Repeated add glyph action
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flags: r.uint16,
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glyph: r.uint16
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}
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});
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let Action = new r.Struct({
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actionClass: r.uint16,
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actionType: r.uint16,
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actionLength: r.uint32,
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actionData: ActionData,
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padding: new r.Reserved(r.uint8, t => t.actionLength - t._currentOffset)
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});
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let PostcompensationAction = new r.Array(Action, r.uint32);
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let PostCompensationTable = new r.Struct({
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lookupTable: new LookupTable(new r.Pointer(r.uint16, PostcompensationAction))
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});
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let JustificationTable = new r.Struct({
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classTable: new r.Pointer(r.uint16, ClassTable, { type: 'parent' }),
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wdcOffset: r.uint16,
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postCompensationTable: new r.Pointer(r.uint16, PostCompensationTable, { type: 'parent' }),
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widthDeltaClusters: new LookupTable(new r.Pointer(r.uint16, WidthDeltaCluster, { type: 'parent', relativeTo: 'wdcOffset' }))
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});
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export default new r.Struct({
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version: r.uint32,
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format: r.uint16,
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horizontal: new r.Pointer(r.uint16, JustificationTable),
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vertical: new r.Pointer(r.uint16, JustificationTable)
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});
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