import { SeqStream } from "bytestreamjs";
import { FontTable } from "../Table";
export interface HMTXMetrix {
    /**
     * Advance width, in font design units
     */
    advanceWidth: number;
    /**
     * Glyph left side bearing, in font design units
     */
    leftSideBearing: number;
}
export interface HMTXParameters {
    /**
     * Paired advance width and left side bearing values for each glyph. Records are indexed by glyph ID
     */
    hMetrics?: HMTXMetrix[];
    /**
     * Left side bearings for glyph IDs greater than or equal to numberOfHMetrics
     */
    leftSideBearings?: number[];
}
/**
 * Represents HMTX table. Horizontal Metrics Table
 * @see https://docs.microsoft.com/en-us/typography/opentype/spec/hmtx
 */
export declare class HMTX extends FontTable {
    /**
     * Paired advance width and left side bearing values for each glyph. Records are indexed by glyph ID
     */
    hMetrics: HMTXMetrix[];
    /**
     * Left side bearings for glyph IDs greater than or equal to numberOfHMetrics
     */
    leftSideBearings: number[];
    constructor(parameters?: HMTXParameters);
    static get tag(): number;
    toStream(stream: SeqStream): boolean;
    /**
     * Convert SeqStream data to object
     * @param stream
     * @param numGlyphs The value is found in the 'maxp' table
     * @param numOfLongHorMetrics The value is found in the 'hhea' (Horizontal Header) table
     */
    static fromStream(stream: SeqStream, numGlyphs: number, numOfLongHorMetrics: number): HMTX;
}