export type StandardFontMetrics = {
    /** Font ascender in PDF text units (1/1000 em) */
    ascender: number;
    /** Font descender in PDF text units (1/1000 em), typically negative */
    descender: number;
    /** Cap height in PDF text units (1/1000 em) */
    capHeight: number;
    /** x-height in PDF text units (1/1000 em) */
    xHeight: number;
    /** Italic angle in degrees (0 for upright fonts) */
    italicAngle: number;
    /** Whether this is a fixed-pitch (monospace) font */
    isFixedPitch: boolean;
    /** Font bounding box [llx, lly, urx, ury] */
    fontBBox: [number, number, number, number];
    /** Default width for missing glyphs */
    defaultWidth: number;
    /** Glyph widths by character code */
    widths: Record<number, number>;
};
export declare const STANDARD_FONT_METRICS: Record<string, StandardFontMetrics>;