import { HB } from '../hb';
export interface SubsetFontOptions {
    variationAxes?: Record<string, number>;
    preserveNameIds?: number[];
    threads?: false | {
        service?: null;
    };
}
/** 从总包中抽取出指定 subset 的字符区间，并返回最终结果的字符 */
export declare function subsetFont(face: HB.Face, subsetUnicode: (number | [number, number])[], hb: HB.Handle, { preserveNameIds, variationAxes }?: SubsetFontOptions): readonly [Uint8Array | null, Uint32Array];