import { WebGLRenderer } from 'three';
import { DRACOLoader } from 'three/examples/jsm/loaders/DRACOLoader.js';
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js';
import { KTX2Loader } from 'three/examples/jsm/loaders/KTX2Loader.js';
/**
 * Set the location of the Draco decoder. If a draco loader has already been created, it will be updated.
 * @default 'https://www.gstatic.com/draco/versioned/decoders/1.5.7/'
 */
export declare function setDracoDecoderLocation(location: string): void;
/**
 * Set the location of the KTX2 transcoder. If a KTX2 loader has already been created, it will be updated.
 * @default 'https://www.gstatic.com/basis-universal/versioned/2021-04-15-ba1c3e4/'
 */
export declare function setKTX2TranscoderLocation(location: string): void;
/**
 * Create loaders/decoders for Draco, KTX2 and Meshopt to be used with GLTFLoader.
 * @param renderer - Provide a renderer to detect KTX2 support.
 * @returns The loaders/decoders.
 */
export declare function createLoaders(renderer: WebGLRenderer | null): {
    dracoLoader: DRACOLoader;
    ktx2Loader: KTX2Loader;
    meshoptDecoder: {
        supported: boolean;
        ready: Promise<void>;
        decodeVertexBuffer: (target: Uint8Array, count: number, size: number, source: Uint8Array, filter?: string) => void;
        decodeIndexBuffer: (target: Uint8Array, count: number, size: number, source: Uint8Array) => void;
        decodeIndexSequence: (target: Uint8Array, count: number, size: number, source: Uint8Array) => void;
        decodeGltfBuffer: (target: Uint8Array, count: number, size: number, source: Uint8Array, mode: string, filter?: string) => void;
    };
};
export declare function addDracoAndKTX2Loaders(loader: GLTFLoader): void;
/**
 * Smart loading hints can be used by needle infrastructure to deliver assets optimized for a specific usecase.
 */
export type SmartLoadingHints = {
    progressive?: boolean;
    usecase?: "product";
};
export declare function configureLoader(loader: GLTFLoader, opts: SmartLoadingHints): void;