import type { GlyphId, int16, uint16 } from "../../types.ts";
import type { Reader } from "../binary/reader.ts";
/**
 * Vertical Origin table (VORG)
 * Provides y-coordinate of vertical origin for CFF fonts
 * Used for proper vertical text layout in CJK fonts
 */
export interface VorgTable {
    majorVersion: uint16;
    minorVersion: uint16;
    defaultVertOriginY: int16;
    vertOriginYMetrics: VertOriginYMetric[];
}
/**
 * Vertical origin metric for a specific glyph
 */
export interface VertOriginYMetric {
    glyphIndex: GlyphId;
    vertOriginY: int16;
}
/**
 * Parse VORG table
 */
export declare function parseVorg(reader: Reader): VorgTable;
/**
 * Get vertical origin Y coordinate for a glyph
 * Returns the y-coordinate of the glyph's vertical origin
 */
export declare function getVertOriginY(vorg: VorgTable, glyphId: GlyphId): int16;
/**
 * Check if a glyph has a specific vertical origin entry
 */
export declare function hasVertOriginY(vorg: VorgTable, glyphId: GlyphId): boolean;