/**
 * Worker utilities for bitbybit engine packages.
 *
 * Provides multiple strategies for creating workers:
 * 1. From CDN URLs (zero configuration, no local files needed)
 * 2. From local project files (for offline/production use)
 */
/**
 * Worker architecture type for CDN workers.
 * - "32" - 32-bit WebAssembly (default, widest browser support)
 * - "64-bit" - 64-bit WebAssembly (better performance, requires browser support for Memory64)
 * - "64-bit-mt" - 64-bit multithreaded WebAssembly (best performance, requires SharedArrayBuffer and Memory64)
 */
export type WorkerArchitecture = "32" | "64" | "64-mt";
/**
 * Worker configuration containing the Worker instance or undefined
 */
export interface WorkerInstances {
    occtWorker?: Worker;
    jscadWorker?: Worker;
    manifoldWorker?: Worker;
}
/**
 * Options for worker creation
 */
export interface WorkerOptions {
    /** Enable OCCT (OpenCASCADE) kernel */
    enableOCCT?: boolean;
    /** Enable JSCAD kernel */
    enableJSCAD?: boolean;
    /** Enable Manifold kernel */
    enableManifold?: boolean;
    /** Custom CDN URL (defaults to GlobalCDNProvider.BITBYBIT_CDN_URL) */
    cdnUrl?: string;
    /**
     * Array of font keys to load for OCCT, or undefined to load all fonts.
     * Pass an empty array to skip loading fonts.
     */
    loadFonts?: string[];
    /**
     * OCCT worker architecture to use. Defaults to "32" (32-bit).
     * Note: This only applies to OCCT workers. JSCAD and Manifold always use 32-bit.
     * - "32" - 32-bit WebAssembly (default, widest browser support)
     * - "64" - 64-bit WebAssembly (better performance, requires browser support for Memory64)
     * - "64-mt" - 64-bit multithreaded WebAssembly (best performance, requires SharedArrayBuffer and Memory64)
     */
    occtArchitecture?: WorkerArchitecture;
}
/**
 * Creates an OCCT worker from CDN.
 * No local files needed - worker is loaded directly from CDN.
 *
 * @param cdnUrl - Optional custom CDN URL
 * @param loadFonts - Array of font keys to load, or undefined to load all fonts. Empty array skips font loading.
 * @param architecture - Worker architecture: "32" (default), "64", or "64-mt"
 */
export declare function createOcctWorkerFromCDN(cdnUrl?: string, loadFonts?: string[], architecture?: WorkerArchitecture): Worker;
/**
 * Creates a JSCAD worker from CDN.
 * No local files needed - worker is loaded from CDN.
 * Note: JSCAD only supports 32-bit architecture.
 *
 * @param cdnUrl - Optional custom CDN URL
 */
export declare function createJscadWorkerFromCDN(cdnUrl?: string): Worker;
/**
 * Creates a Manifold worker from CDN.
 * No local files needed - worker is loaded from CDN.
 * Note: Manifold only supports 32-bit architecture.
 *
 * @param cdnUrl - Optional custom CDN URL
 */
export declare function createManifoldWorkerFromCDN(cdnUrl?: string): Worker;
/**
 * Creates all enabled worker instances from CDN.
 * This is the simplest way to get started - no local files needed!
 *
 * @example
 * ```typescript
 * // Default 32-bit workers
 * const workers = createWorkersFromCDN({ enableOCCT: true, enableJSCAD: true });
 *
 * // 64-bit OCCT worker for better performance (JSCAD/Manifold remain 32-bit)
 * const workers64 = createWorkersFromCDN({ enableOCCT: true, occtArchitecture: "64" });
 *
 * // 64-bit multithreaded OCCT worker for best performance
 * const workersMT = createWorkersFromCDN({ enableOCCT: true, occtArchitecture: "64-mt" });
 * ```
 */
export declare function createWorkersFromCDN(options: WorkerOptions): WorkerInstances;
/**
 * Creates workers from local project files (ES module workers).
 * Use this when you have worker files in your project for offline/production use.
 *
 * @param workerUrls - URLs to your local worker files
 *
 * @example
 * ```typescript
 * const workers = createWorkersFromUrls({
 *   occtWorkerUrl: new URL("./workers/occt.worker.ts", import.meta.url),
 *   jscadWorkerUrl: new URL("./workers/jscad.worker.ts", import.meta.url),
 * });
 * ```
 */
export declare function createWorkersFromUrls(workerUrls: {
    occtWorkerUrl?: URL | string;
    jscadWorkerUrl?: URL | string;
    manifoldWorkerUrl?: URL | string;
}): WorkerInstances;