import { SeqStream } from "bytestreamjs";
import { FontTable } from "../Table";
export interface HHEAParameters {
    /**
     * version number of the horizontal header table
     */
    version?: number;
    /**
     * Typographic ascent
     */
    ascent?: number;
    /**
     * Typographic descent
     */
    descent?: number;
    /**
     * Typographic line gap
     */
    lineGap?: number;
    /**
     * Maximum advance width value in 'hmtx' table
     */
    advanceWidthMax?: number;
    /**
     * Minimum left sidebearing value in 'hmtx' table for glyphs with contours (empty glyphs should be ignored)
     */
    minLeftSideBearing?: number;
    /**
     * Minimum right sidebearing value; calculated as min(aw - (lsb + xMax - xMin)) for glyphs with contours (empty glyphs should be ignored)
     */
    minRightSideBearing?: number;
    /**
     * Max(lsb + (xMax - xMin))
     */
    xMaxExtent?: number;
    /**
     * Used to calculate the slope of the cursor (rise/run); 1 for vertical
     */
    caretSlopeRise?: number;
    /**
     * 0 for vertical
     */
    caretSlopeRun?: number;
    /**
     * The amount by which a slanted highlight on a glyph needs to be shifted to produce the best appearance. Set to 0 for non-slanted fonts
     */
    caretOffset?: number;
    /**
     * set to 0
     */
    reserved1?: number;
    /**
     * set to 0
     */
    reserved2?: number;
    /**
     * set to 0
     */
    reserved3?: number;
    /**
     * set to 0
     */
    reserved4?: number;
    /**
     * 0 for current format
     */
    metricDataFormat?: number;
    /**
     * Number of hMetric entries in 'hmtx' table
     */
    numOfLongHorMetrics?: number;
}
/**
 * Representation of HEAD table. Horizontal Header Table. This table contains information for horizontal layout
 * @see https://docs.microsoft.com/en-us/typography/opentype/spec/hhea
 */
export declare class HHEA extends FontTable {
    /**
     * version number of the horizontal header table
     */
    version: number;
    /**
     * Typographic ascent
     */
    ascent: number;
    /**
     * Typographic descent
     */
    descent: number;
    lineGap: number;
    /**
     * Maximum advance width value in 'hmtx' table
     */
    advanceWidthMax: number;
    /**
     * Minimum left sidebearing value in 'hmtx' table for glyphs with contours (empty glyphs should be ignored)
     */
    minLeftSideBearing: number;
    /**
     * Minimum right sidebearing value; calculated as min(aw - (lsb + xMax - xMin)) for glyphs with contours (empty glyphs should be ignored)
     */
    minRightSideBearing: number;
    /**
     * Max(lsb + (xMax - xMin))
     */
    xMaxExtent: number;
    /**
     * Used to calculate the slope of the cursor (rise/run); 1 for vertical
     */
    caretSlopeRise: number;
    /**
     * 0 for vertical
     */
    caretSlopeRun: number;
    /**
     * The amount by which a slanted highlight on a glyph needs to be shifted to produce the best appearance. Set to 0 for non-slanted fonts
     */
    caretOffset: number;
    /**
     * set to 0
     */
    reserved1: number;
    /**
     * set to 0
     */
    reserved2: number;
    /**
     * set to 0
     */
    reserved3: number;
    /**
     * set to 0
     */
    reserved4: number;
    /**
     * 0 for current format
     */
    metricDataFormat: number;
    /**
     * Number of hMetric entries in 'hmtx' table
     */
    numOfLongHorMetrics: number;
    constructor(parameters?: HHEAParameters);
    static get tag(): number;
    toStream(stream: SeqStream): boolean;
    static fromStream(stream: SeqStream): HHEA;
}