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