import { type GlyphRun } from './glyph-run.ts';
import { type GdefTable } from './tables/gdef.ts';
import { type GposTable } from './tables/gpos.ts';
import { type GsubTable } from './tables/gsub.ts';
import { type HmtxTable } from './tables/hmtx.ts';
export type LayoutOptions = {
    scriptTag?: string;
    langSysTag?: string;
};
export declare class GsubProcessor {
    private readonly gsubTable;
    private readonly hmtxTable;
    private readonly gdefTable;
    private readonly lookupsCache;
    private readonly innerLookupCache;
    constructor(gsubTable: GsubTable, hmtxTable: HmtxTable, gdefTable?: GdefTable);
    apply(glyphRun: GlyphRun, features: string[], options: LayoutOptions): void;
    private getFeatureIndexByTag;
    private applyFeatureByIndex;
    private readonly applyLookup;
    private getLookupsByIndex;
}
export declare class GposProcessor {
    private readonly gposTable;
    private readonly gdefTable;
    private readonly lookupsCache;
    constructor(gposTable: GposTable, gdefTable?: GdefTable);
    hasFeature(featureTag: string, options: LayoutOptions): boolean;
    apply(glyphRun: GlyphRun, features: string[], options: LayoutOptions): Map<number, number>;
    private findLangSysTable;
    private getFeatureIndexByTag;
    private applyFeatureByIndex;
    private getLookupsByIndex;
}
/**
 * Creates a skip function for a lookup based on its flags and the GDEF
 * table. Returns undefined when the lookup has no filtering flags set.
 */
export declare function createSkipFn(lookupFlag: number, markFilteringSet: number | undefined, gdef: GdefTable | undefined): ((glyphId: number) => boolean) | undefined;