import * as THREE from 'three';
import { BaseExtension } from './base';
import type { Parser } from '../parser';
/**
 * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_texture_webp
 */
export declare class EXT_texture_webp extends BaseExtension {
    private supportsWep;
    prepare(parser: Parser): void | Promise<void>;
    loadTexture(index: number, parser: Parser): null | Promise<THREE.Texture>;
}