/**
 * Encodes a text string for use in a PDF content stream text operator (`Tj`).
 *
 * PDF literal strings `(...)` in content streams are raw bytes interpreted by the
 * font's encoding — NOT UTF-8. This function produces the correct PDF string token:
 *
 * - Type0/Identity-H fonts: hex string `<XXXX...>` with 2 bytes per character (CID = Unicode codepoint)
 * - Single-byte fonts: PDF literal `(...)` with octal escapes `\ooo` for byte values ≥ 0x80,
 *   using the reverse encoding map when available for characters outside the Latin-1 range.
 *
 * @param text - The Unicode text to encode
 * @param isUnicode - True if the font uses Type0/Identity-H encoding (2-byte CID per character)
 * @param reverseEncodingMap - Optional map from Unicode character to byte code,
 *   derived by inverting the font's Differences-based encoding map
 * @returns A PDF string token ready to use before `Tj`, e.g. `<0050> Tj` or `(text) Tj`
 */
export declare function encodePdfText(text: string, isUnicode: boolean, reverseEncodingMap?: Map<string, number>): string;