export type uint8 = number;
export type int8 = number;
export type uint16 = number;
export type int16 = number;
export type uint32 = number;
export type int32 = number;
export type Fixed = number;
export type F2Dot14 = number;
export type FWord = number;
export type UFWord = number;
export type Offset16 = number;
export type Offset32 = number;
export type GlyphId = number;
/** 4-character ASCII tag (packed as uint32 for efficiency) */
export type Tag = number;
/** Text direction */
export declare enum Direction {
    Invalid = 0,
    LTR = 4,
    RTL = 5,
    TTB = 6,
    BTT = 7
}
/** Cluster level for glyph-character mapping */
export declare enum ClusterLevel {
    MonotoneGraphemes = 0,
    MonotoneCharacters = 1,
    Characters = 2
}
/** Buffer flags */
export declare enum BufferFlags {
    Default = 0,
    BeginningOfText = 1,
    EndOfText = 2,
    PreserveDefaultIgnorables = 4,
    RemoveDefaultIgnorables = 8,
    DoNotInsertDottedCircle = 16
}
/** Glyph classification from GDEF */
export declare enum GlyphClass {
    Base = 1,
    Ligature = 2,
    Mark = 3,
    Component = 4
}
/** Feature specification for shaping */
export interface Feature {
    tag: Tag;
    value: number;
    start: number;
    end: number;
}
/** Variation axis value */
export interface Variation {
    tag: Tag;
    value: number;
}
/** Glyph info during shaping */
export interface GlyphInfo {
    glyphId: GlyphId;
    cluster: number;
    mask: number;
    /** Unicode codepoint (before shaping) */
    codepoint: number;
}
/** Glyph position after shaping */
export interface GlyphPosition {
    xAdvance: number;
    yAdvance: number;
    xOffset: number;
    yOffset: number;
}
/** Table record from font directory */
export interface TableRecord {
    tag: Tag;
    checksum: uint32;
    offset: Offset32;
    length: uint32;
}
/** Lookup flags for controlling glyph matching */
export interface LookupFlags {
    rightToLeft: boolean;
    ignoreBaseGlyphs: boolean;
    ignoreLigatures: boolean;
    ignoreMarks: boolean;
    useMarkFilteringSet: boolean;
    markAttachmentType: number;
    markFilteringSet?: number;
}
export declare function tag(str: string): Tag;
export declare function tagToString(t: Tag): string;
export declare const Tags: {
    readonly head: number;
    readonly hhea: number;
    readonly hmtx: number;
    readonly maxp: number;
    readonly cmap: number;
    readonly loca: number;
    readonly glyf: number;
    readonly name: number;
    readonly OS2: number;
    readonly post: number;
    readonly GDEF: number;
    readonly GSUB: number;
    readonly GPOS: number;
    readonly BASE: number;
    readonly JSTF: number;
    readonly MATH: number;
    readonly CFF: number;
    readonly CFF2: number;
    readonly fvar: number;
    readonly gvar: number;
    readonly avar: number;
    readonly HVAR: number;
    readonly VVAR: number;
    readonly MVAR: number;
    readonly morx: number;
    readonly kerx: number;
    readonly kern: number;
    readonly trak: number;
    readonly feat: number;
    readonly COLR: number;
    readonly CPAL: number;
    readonly SVG: number;
    readonly sbix: number;
    readonly CBDT: number;
    readonly CBLC: number;
    readonly STAT: number;
    readonly vhea: number;
    readonly vmtx: number;
    readonly VORG: number;
    readonly fpgm: number;
    readonly prep: number;
    readonly cvt: number;
    readonly gasp: number;
};
export declare const FeatureTags: {
    readonly ccmp: number;
    readonly locl: number;
    readonly rlig: number;
    readonly liga: number;
    readonly clig: number;
    readonly calt: number;
    readonly rclt: number;
    readonly dlig: number;
    readonly smcp: number;
    readonly c2sc: number;
    readonly isol: number;
    readonly init: number;
    readonly medi: number;
    readonly fina: number;
    readonly kern: number;
    readonly mark: number;
    readonly mkmk: number;
    readonly curs: number;
    readonly dist: number;
};