import { OutlineSource } from './glyf-outline.js';
/**
 * Prepare an embedded CFF program for outline reading.
 *
 * @param program The raw `/FontFile3` bytes (bare CFF, or the `CFF ` table of
 *                an OpenType wrapper — the caller unwraps that).
 * @returns A reader keyed by GLYPH INDEX, or `undefined` where the program
 *          cannot be read.
 */
export declare function cffOutlineSource(program: Uint8Array): OutlineSource | undefined;
/**
 * TN 5176 §13 — the NAME a CFF gives each glyph, inverted.
 *
 * A simple font selects its glyphs by name, not by index: `/Differences` says
 * code 2 is `g18`, and only the program's charset says which glyph `g18` is.
 * TAMReview.pdf sets most of its body in a Cambria subset named that way.
 *
 * @param program The raw CFF bytes.
 * @returns Glyph name → glyph index, or `undefined` for a CID-keyed program
 *          (which names nothing) or one that cannot be read.
 */
export declare function cffNameToGid(program: Uint8Array): Map<string, number> | undefined;
/**
 * TN 5176 §10 — the CID a CID-keyed CFF gives each glyph, inverted.
 *
 * A `CIDFontType0C` program is charset-ordered by CID, not by glyph index, so a
 * composite font's code (its CID) is not the index into `CharStrings`. Where the
 * program is not CID-keyed the two are the same and this gives nothing.
 *
 * @param program The raw CFF bytes.
 * @returns CID → glyph index, or `undefined` for a program that is not
 *          CID-keyed or cannot be read.
 */
export declare function cffCidToGid(program: Uint8Array): Map<number, number> | undefined;
/** The `CFF ` table of an OpenType wrapper, where the program is one. */
export declare function openTypeCff(program: Uint8Array): Uint8Array | undefined;