import { IExtensionFactory, IExtensionInstance } from "../IExtension";
import GltfLoader from "../../io/GltfLoader";
/**
 * In PBR materials, two workflows exist for specifying the surface appearance of a material:
 * - Metallic-Roughness workflow, defined natively in nanogl-gltf with PbrMetallicRoughness element,
 * - Specular-Glossiness workflow, defined with this extension.
 *
 * This extension allows Materials to be defined using the specular-glossiness workflow, with diffuseTexture as the base color,
 * and specularGlossinessTexture containing the specular and glossiness data.
 */
export default class KHR_materials_pbrSpecularGlossiness implements IExtensionFactory {
    readonly name: string;
    createInstance(gltfLoader: GltfLoader): IExtensionInstance;
}