import type { GlyphInfo } from "../../types.ts";
/**
 * Khmer character categories
 */
export declare enum KhmerCategory {
    Other = 0,
    Consonant = 1,
    IndependentVowel = 2,
    DependentVowel = 3,
    Coeng = 4,// Subscript sign (្)
    Register = 5,// Register shifters
    Robat = 6,// Consonant shifter (៌)
    Sign = 7,
    Anusvara = 8,// Nikahit (ំ)
    Visarga = 9
}
/**
 * Get Khmer character category
 */
export declare function getKhmerCategory(cp: number): KhmerCategory;
/**
 * Khmer feature masks
 */
export declare const KhmerFeatureMask: {
    readonly pref: 1;
    readonly blwf: 2;
    readonly abvf: 4;
    readonly pstf: 8;
    readonly cfar: 16;
    readonly pres: 32;
    readonly abvs: 64;
    readonly blws: 128;
    readonly psts: 256;
    readonly clig: 512;
};
/**
 * Check if codepoint is Khmer
 */
export declare function isKhmer(cp: number): boolean;
/**
 * Setup Khmer masks for feature application
 */
export declare function setupKhmerMasks(infos: GlyphInfo[]): void;
/**
 * Reorder Khmer pre-base vowels
 * Pre-base vowels (◌េ ◌ែ ◌ៃ) should visually appear before the base
 */
export declare function reorderKhmer(infos: GlyphInfo[]): void;