import type { LoadingManager, Object3D } from 'three/webgpu';
import { type DecodedGltfModelPacket, type ModelDecodeRequestOptions } from '../worker/modelDecodeProtocol';
type DecodeLoadingManager = Pick<LoadingManager, 'resolveURL' | 'itemStart' | 'itemEnd' | 'itemError'>;
export interface ModelDecodeWorkerClientOptions {
    onFatal?(error: ModelDecodeWorkerUnavailableError): void;
}
export interface ModelDecodeWorkerLoadOptions extends ModelDecodeRequestOptions {
    signal?: AbortSignal;
    loadingManager?: DecodeLoadingManager;
}
export declare class ModelDecodeWorkerUnavailableError extends Error {
    name: string;
    constructor(message: string, options?: ErrorOptions);
}
/**
 * Reuses transferred bitmap identities so equal textures keep one batch key.
 * The lookup is an LRU: evicting an entry drops only this client's strong
 * reference; existing Three.js textures continue to own and use the bitmap.
 */
export declare function reuseDecodedImageContent(packet: DecodedGltfModelPacket, imagesByContent: Map<string, ImageBitmap>, maxEntries?: number): string[];
/** Render-Worker side client for the acknowledged model decoder Worker. */
export declare class ModelDecodeWorkerClient {
    #private;
    readonly worker: Worker;
    constructor(worker: Worker, options?: ModelDecodeWorkerClientOptions);
    get disposed(): boolean;
    supports(url: string): boolean;
    loadAsync(url: string, options?: ModelDecodeWorkerLoadOptions): Promise<Object3D>;
    dispose(): void;
}
export {};