/**
 * Tree Silhouette Image Loader
 *
 * Loads and caches AI-generated tree silhouette images for the Forest background.
 * Pre-renders images to offscreen canvases for optimal drawing performance.
 */
export type TreeCategory = 'pine' | 'fir' | 'spruce' | 'oak' | 'maple' | 'poplar' | 'willow' | 'dead';
interface TreeImage {
    category: TreeCategory;
    filename: string;
    canvas: OffscreenCanvas | HTMLCanvasElement;
    width: number;
    height: number;
    aspectRatio: number;
}
/**
 * Creates a tree silhouette image loader
 */
export declare function createTreeSilhouetteImageLoader(): {
    preload: () => Promise<void>;
    getRandomFromCategory: (category: TreeCategory, seed?: number) => TreeImage | null;
    getUniqueFromCategory: (category: TreeCategory, usedImages: Set<string>, seed?: number) => TreeImage | null;
    getCategory: (category: TreeCategory) => TreeImage[];
    getImage: (category: TreeCategory, index: number) => TreeImage | null;
    isReady: () => boolean;
    getLoadedCount: () => number;
    getCategoryCounts: () => Record<TreeCategory, number>;
};
export type TreeSilhouetteImageLoader = ReturnType<typeof createTreeSilhouetteImageLoader>;
export {};
//# sourceMappingURL=TreeSilhouetteImageLoader.d.ts.map