import type { Asset, AssetGraph } from 'assetgraph';
import type { VariationAxes, TracedFontUsage } from './types/shared';
type FontBuffer = Buffer | Uint8Array;
interface AssetTextWithProps {
    fontUsages: TracedFontUsage[];
}
type ExtraSubsetCacheOptions = Record<string, boolean | string[] | undefined>;
declare function subsetCacheKey(fontBuffer: FontBuffer, text: string, targetFormat: string, variationAxes: VariationAxes, featureGlyphIds: number[] | undefined, extraOptions?: ExtraSubsetCacheOptions | undefined): string;
declare class SubsetDiskCache {
    private _cacheDir;
    private _console;
    private _ensured?;
    private _warnedWrite;
    constructor(cacheDir: string, console: Console | null | undefined);
    private _ensureDir;
    get(key: string): Promise<Buffer | undefined>;
    private _atomicWrite;
    set(key: string, buffer: Buffer): Promise<void>;
}
export declare function getSubsetPromiseId(fontUsage: TracedFontUsage, format: string, variationAxes?: VariationAxes | null): string;
export declare function getSubsetsForFontUsage(assetGraph: AssetGraph, htmlOrSvgAssetTextsWithProps: AssetTextWithProps[], formats: string[], seenAxisValuesByFontUrlAndAxisName: Map<string, Map<string, Set<number>>>, cacheDir?: string | null, console?: Console | null, debug?: boolean, signal?: AbortSignal): Promise<Map<string, Asset>>;
export { subsetCacheKey as _subsetCacheKey, SubsetDiskCache as _SubsetDiskCache, };
//# sourceMappingURL=subsetGeneration.d.ts.map