import type { GlyphId, Tag, Variation } from "../types.ts";
import type { Font } from "./font.ts";
import { type VariationAxis } from "./tables/fvar.ts";
/**
 * A Face represents a specific instance of a variable font.
 * For non-variable fonts, it simply wraps the Font.
 */
export declare class Face {
    readonly font: Font;
    /** Normalized axis coordinates [-1, 1] */
    private _coords;
    /** User-space axis values */
    private _variations;
    /** Cached advance width deltas for variable fonts (glyphId -> delta) */
    private _advanceDeltas;
    constructor(font: Font, variations?: Record<string, number> | Variation[]);
    /**
     * Set variation axis values
     * @param variations Object with axis tags as keys (e.g., { wght: 700, wdth: 100 })
     *                   or array of Variation objects
     */
    setVariations(variations: Record<string, number> | Variation[]): void;
    /**
     * Get normalized coordinates for variation processing
     */
    get normalizedCoords(): number[];
    /**
     * Check if this is a variable font instance
     */
    get isVariable(): boolean;
    /**
     * Get variation axes
     */
    get axes(): VariationAxis[];
    /**
     * Get current value for an axis
     */
    getAxisValue(axisTag: Tag | string): number | null;
    /**
     * Get advance width for a glyph, including variation deltas
     */
    advanceWidth(glyphId: GlyphId): number;
    /**
     * Get left side bearing for a glyph, including variation deltas
     */
    leftSideBearing(glyphId: GlyphId): number;
    get numGlyphs(): number;
    get unitsPerEm(): number;
    get ascender(): number;
    get descender(): number;
    get lineGap(): number;
    glyphId(codepoint: number): GlyphId;
    glyphIdForChar(char: string): GlyphId;
    hasTable(t: Tag): boolean;
    get gdef(): import("./tables/gdef.ts").GdefTable | null;
    get gsub(): import("./tables/gsub.ts").GsubTable | null;
    get gpos(): import("./tables/gpos.ts").GposTable | null;
    get kern(): import("./tables/kern.ts").KernTable | null;
    get morx(): import("./tables/morx.ts").MorxTable | null;
    get cmap(): import("./tables/cmap.ts").CmapTable;
    get hmtx(): import("./tables/hmtx.ts").HmtxTable;
    get hhea(): import("./tables/hhea.ts").HheaTable;
}
/**
 * Create a face from a font with optional variations
 */
export declare function createFace(font: Font, variations?: Record<string, number> | Variation[]): Face;