import { ByteArray } from '../../types.js';
import { FontDescriptor, TtfFontInfo, FontParser } from '../types.js';
/**
 * Parses OpenType font files (.otf) to extract metrics and glyph widths.
 * Supports both CFF-based and TrueType-based OpenType fonts.
 *
 * Note: OTF files share the same table structure as TTF for metrics,
 * the main difference is the glyph outline format (CFF vs TrueType).
 */
export declare class OtfParser implements FontParser {
    private data;
    private tables;
    private isCFF;
    constructor(fontData: ByteArray);
    /**
     * Returns the original font bytes.
     */
    getFontData(): ByteArray;
    private parseTables;
    private readTag;
    private getTable;
    /**
     * Returns true if this is a CFF-based OpenType font.
     */
    isCFFBased(): boolean;
    /**
     * Parses the font and returns basic font information.
     */
    getFontInfo(): TtfFontInfo;
    /**
     * Creates a FontDescriptor suitable for embedding.
     * Scales metrics to PDF's 1000-unit em square.
     */
    getFontDescriptor(fontName?: string): FontDescriptor;
    /**
     * Gets character widths for a range of characters.
     */
    getCharWidths(firstChar: number, lastChar: number): number[];
    private parseHead;
    private parseHhea;
    private parseOS2;
    private parsePost;
    private parseName;
    parseCmap(): Map<number, number>;
    private parseCmapFormat4;
    private parseCmapFormat12;
    parseHmtx(): Map<number, number>;
    private parseMaxp;
    private estimateStemV;
}
export declare function estimateStemVFromWeight(weightClass: number): number;