export declare function toArrayBuffer(buffer: Buffer): ArrayBuffer;
export interface FontTable {
    fontFamily: string;
    fullName: string;
    styleName: string;
    postScriptName: string;
    weight: number;
    italic: boolean;
}
export declare function extractFontTable(fontBuffer: ArrayBufferLike): FontTable;
export declare function determineFontType(fontBuffer: ArrayBufferLike): string;
/**
 * The font's TYPOGRAPHIC ascender as a fraction of the em (`OS/2.sTypoAscender / unitsPerEm`).
 * This is the metric InDesign uses for its "Ascent" first-baseline offset. It is NOT always equal
 * to the canvas `fontBoundingBoxAscent` (which follows `winAscent`/`hhea` and can be inflated —
 * e.g. DIN-Bold: typo 0.712em vs win 1.015em). Returns null if unreadable.
 */
export declare function typoAscentRatio(fontBuffer: ArrayBufferLike): number | null;
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