/**
 * Which of the standard 14 a `/BaseFont` names, or `undefined` for a face this
 * has no metrics for.
 *
 * The four obliques are the upright slanted rather than respaced, so they share
 * its table, and every Courier is 600 flat. The names Arial, Times New Roman
 * and Courier New are matched too: a file that names one and embeds nothing is
 * asking for the metric-compatible face every reader substitutes, and giving it
 * anything else measures the page wrong.
 */
export declare function standardFace(baseFont: string): string | undefined;
/**
 * The advance of one code in a standard face, in 1000ths of an em.
 *
 * @param face   One of the names {@link standardFace} returns.
 * @param code   The character code, as the content stream showed it.
 * @param text   What that code decodes to, when the font could say.
 * @returns The width, or `undefined` where the face states none for it.
 */
export declare function standardWidth(face: string, code: number, text: string): number | undefined;