import { AssetPromise, EngineObject } from "@galacean/engine-core";
import { GLTFExtensionOwnerSchema } from "../GLTFSchema";
import { GLTFParserContext } from "../parser/GLTFParserContext";
import { GLTFExtensionSchema } from "./GLTFExtensionSchema";
/**
 * Base class of glTF extension parser.
 */
export declare abstract class GLTFExtensionParser {
    /**
     * @internal
     * The extension mode.
     */
    _mode: GLTFExtensionMode;
    /**
     * Create and parse the resource.
     * @remarks This method overrides the default resource creation.
     * @param context - The parser context
     * @param extensionSchema - The extension schema
     * @param extensionOwnerSchema - The extension owner schema
     * @returns The resource or promise
     */
    createAndParse(context: GLTFParserContext, extensionSchema: GLTFExtensionSchema, extensionOwnerSchema: GLTFExtensionOwnerSchema, ...extra: any[]): EngineObject | AssetPromise<EngineObject | Uint8Array>;
    /**
     * Additive parse to the resource.
     * @param context - The parser context
     * @param parseResource - The parsed resource
     * @param extensionSchema - The extension schema
     * @param extensionOwnerSchema - The extension owner schema
     * @returns The void or promise
     */
    additiveParse(context: GLTFParserContext, parseResource: EngineObject, extensionSchema: GLTFExtensionSchema, extensionOwnerSchema: GLTFExtensionOwnerSchema, ...extra: any[]): void | AssetPromise<void>;
}
/**
 * glTF Extension mode.
 */
export declare enum GLTFExtensionMode {
    /**
     * Cerate instance and parse mode.
     * @remarks
     * If the glTF property has multiple extensions of `CreateAndParse` mode, only execute the last one.
     * If this method is registered, the default pipeline processing will be ignored.
     */
    CreateAndParse = 0,
    /** Additive parse mode. */
    AdditiveParse = 1
}