import { clipBufferOptions, postProcessingOptionsType, returnResultType, TileItem } from "./types";
export declare function getCanvas(tileSize?: number): OffscreenCanvas;
export declare function resizeCanvas(canvas: OffscreenCanvas, width: number, height: number): void;
export declare function clearCanvas(ctx: OffscreenCanvasRenderingContext2D): void;
export declare function getCanvasContext(canvas: OffscreenCanvas): OffscreenCanvasRenderingContext2D;
export declare function getBlankTile(tileSize?: number): ImageBitmap;
export declare function get404Tile(tileSize?: number): ImageBitmap;
export declare function mergeTiles(images: Array<ImageBitmap>, globalCompositeOperation?: GlobalCompositeOperation): import("./Error").CustomError | ImageBitmap;
export declare function imageClip(tileSize: number, polygons: number[][][][], image: ImageBitmap, reverse: boolean, clipBufferOpts?: clipBufferOptions): ImageBitmap;
export declare function imageTileScale(image: ImageBitmap, dx: number, dy: number, w: number, h: number): ImageBitmap;
export declare function layoutTiles(tiles: Array<TileItem>, debug: boolean, reverseY: boolean): ImageBitmap;
export declare function postProcessingImage(image: ImageBitmap, options: postProcessingOptionsType): ImageBitmap;
export declare function imageQuality(image: ImageBitmap, options: returnResultType): Promise<ImageBitmap>;
export declare function createImageTypeResult(canvas: OffscreenCanvas, image1: ImageBitmap, options: returnResultType): Promise<string | ImageBitmap | ArrayBuffer>;
export declare function colorsTerrainTile(colors: any, image: ImageBitmap): ImageBitmap;