import { ObjectKeymap } from "../GenericInterfaces";
import { TextureStore, TilesetTextureConfig } from "./TextureStore";
import * as PIXI from "pixi.js";
interface AssetLoaderConfiguration {
    textureStore?: TextureStore;
}
/**
 * Upgrade to Pixi's resource loader capable of handling all types of assets commonly used in games and importing them for
 * easy use.
 */
export declare class AssetLoader {
    private _resources?;
    private _wasStarted;
    private readonly _pendingTextures;
    private readonly _pendingSheets;
    private readonly _pendingTilesets;
    private readonly _pendingPixiAutoFonts;
    textureStore: TextureStore;
    constructor(config?: AssetLoaderConfiguration);
    /**
     * Queues a texture to be loaded and registered in the [[TextureStore]].
     *
     * @param {string} name Name by which the texture will be registered in [[TextureStore]].
     * @param {string} imageUrl URL pointing to the image to load.
     * @throws {Error} Thrown when loading was already started.
     */
    queueTexture(name: string, imageUrl: string): void;
    /**
     * Queues a spritesheet to be loaded. Every sprite in the sheet will be registered in the [[TextureStore]] with the name
     * of the sprite, optionally prefixed.
     *
     * @param {string} imageUrl URL pointing to the image to load for the spritesheet.
     * @param {object} sheetJson PIXI.SpriteSheet's format of data
     * @param {string=""} prefix Optional prefix which is added before every frame's name when loading it into
     *        [[TextureStore]].
     * @throws {Error} Thrown when loading was already started.
     */
    queueSheet(imageUrl: string, sheetJson: ObjectKeymap, prefix?: string): void;
    /**
     * Queues a tileset to be registed in [[TextureStore]].
     *
     * @param {string} name Name of the texture to use as a base for the tileset - it may be a separately loaded texture
     *        or one of spritesheet's frames.
     * @param {TilesetTextureConfig} config Tileset configuration.
     * @throws {Error} Thrown when loading was already started.
     */
    queueTileset(name: string, config: TilesetTextureConfig): void;
    queuePixiAutoFont(name: string, fontXmlUrl: string): void;
    /**
     * Loads the queued assets and registers them in the appropriate stores.
     * @param {PIXI.Loader} loader Loader instance to use. In most cases you just want to pass the static PIXI Loader.
     * @return {Promise<boolean>} A promise that resolves when all of the operations are finishes successfully. Value of the promise will
     *         always be `true`.
     * @throws {Error} Thrown when loading was already started.
     */
    load(loader: PIXI.Loader): Promise<boolean>;
    private loadTextures;
    private loadSpritesheets;
    private loadTilesets;
    private assertNotStarted;
}
export {};