import type { GlyphInfo } from "../../types.ts";
/**
 * Tibetan shaper
 * Handles Tibetan script complex text layout
 *
 * Tibetan is an Indic-derived script with:
 * - Base consonants (Ka, Kha, Ga, etc.)
 * - Subjoined consonants (below base)
 * - Vowel signs (above/below)
 * - Head letters (pre-composed stacks)
 * - Various combining marks
 */
/**
 * Tibetan character categories
 */
export declare enum TibetanCategory {
    Other = 0,
    Base = 1,// Base consonants (Ka-A)
    Subjoined = 2,// Subjoined consonants (0F90-0FBC)
    VowelAbove = 3,// Vowel signs above (0F71-0F7D, 0F80-0F83)
    VowelBelow = 4,// Vowel signs below (0F71, 0F7A-0F7D)
    ASubjoin = 5,// Subjoined A (0FB0)
    HeadMark = 6,// Head marks (0F39)
    Anusvara = 7,// Anusvara/Candrabindu (0F7E, 0F7F, 0F82, 0F83)
    Halanta = 8,// Halanta (0F84)
    Digit = 9,// Digits (0F20-0F33)
    Symbol = 10,// Symbols and punctuation
    ZWNJ = 11,// Zero Width Non-Joiner
    ZWJ = 12
}
/**
 * Classify Tibetan codepoint
 */
export declare function getTibetanCategory(cp: number): TibetanCategory;
/**
 * Tibetan feature masks
 */
export declare const TibetanFeatureMask: {
    readonly ccmp: 1;
    readonly locl: 2;
    readonly abvs: 4;
    readonly blws: 8;
    readonly calt: 16;
    readonly liga: 32;
};
/**
 * Set up masks for Tibetan shaping
 */
export declare function setupTibetanMasks(infos: GlyphInfo[]): void;
/**
 * Get default Tibetan features in order
 */
export declare function getTibetanFeatures(): string[];
/**
 * Check if script uses Tibetan shaper
 */
export declare function usesTibetan(script: string): boolean;