import type { WorkerModule } from 'troika-worker-utils';
import type { FontParser, ResolvedFont } from './FontParser.js';
import type { UnicodeFontResolverClient } from './libs/unicode-font-resolver-client.factory.js';
export type FontStyle = 'normal' | 'italic';
export type FontWeight = 'normal' | 'bold' | number;
export type FontUnicodeRange = readonly [start: number, end?: number];
export interface UserFont {
    readonly src: string;
    readonly label?: string;
    readonly unicodeRange?: readonly FontUnicodeRange[];
    readonly lang?: RegExp;
}
export interface FontResolverOptions {
    readonly lang?: string;
    readonly fonts?: UserFont | readonly UserFont[];
    readonly style?: FontStyle;
    readonly weight?: FontWeight;
    readonly unicodeFontsURL?: string;
    readonly unicodeFontsDebug?: boolean;
}
export interface FontResolverResult {
    readonly chars: Uint8Array;
    readonly fonts: ResolvedFont[];
}
export type FontResolverCallback = (result: FontResolverResult) => void;
export type FontResolver = (text: string, callback: FontResolverCallback, options?: FontResolverOptions) => void;
export type FontResolverWorkerModule = WorkerModule<[
    text: string,
    callback: FontResolverCallback,
    options?: FontResolverOptions
], void, FontResolver>;
/** Factory for the FontResolver function. */
export declare function createFontResolver(fontParser: FontParser, unicodeFontResolverClient: UnicodeFontResolverClient): FontResolver;
export declare const fontResolverWorkerModule: FontResolverWorkerModule;