import type { GlyphId, int16, uint16 } from "../../types.ts";
import type { Reader } from "../binary/reader.ts";
/**
 * Vertical Metrics table (vmtx)
 * Contains vertical metrics for each glyph
 */
export interface VmtxTable {
    /** Vertical metrics (advance height + top side bearing) */
    vMetrics: VerticalMetric[];
    /** Top side bearings for remaining glyphs */
    topSideBearings: int16[];
}
/**
 * Vertical metric record
 */
export interface VerticalMetric {
    /** Advance height in font units */
    advanceHeight: uint16;
    /** Top side bearing in font units */
    topSideBearing: int16;
}
/**
 * Parse vmtx table
 * @param reader Binary reader
 * @param numberOfVMetrics From vhea table
 * @param numGlyphs Total number of glyphs
 */
export declare function parseVmtx(reader: Reader, numberOfVMetrics: number, numGlyphs: number): VmtxTable;
/**
 * Get vertical metrics for a glyph
 */
export declare function getVerticalMetrics(vmtx: VmtxTable, glyphId: GlyphId): {
    advanceHeight: number;
    topSideBearing: number;
};