/** A parsed `/ToUnicode` CMap: the code→Unicode mapping and the code width. */
export interface ToUnicode {
    /** Character code → Unicode string (a single code may map to a ligature). */
    readonly map: ReadonlyMap<number, string>;
    /** Whether character codes are one or two bytes wide (from `codespacerange`). */
    readonly codeBytes: 1 | 2;
}
/**
 * Parse a `/ToUnicode` CMap (ISO 32000-1 §9.10.3) into a code→Unicode map. Reads
 * the `codespacerange` (code width), `bfchar` (single codes) and `bfrange`
 * (contiguous ranges, scalar or array destination) blocks; everything else is
 * ignored.
 *
 * @param bytes The decoded CMap stream.
 * @returns The mapping plus the declared code width (1 or 2 bytes).
 */
export declare function parseToUnicodeCMap(bytes: Uint8Array): ToUnicode;