import { type ForwardedRef, RefObject } from 'react';
import type { IReactVegaHandler } from '../vis/react-vega';
import type { IVegaChartRef } from '../interfaces';
type GridItem = Pick<IVegaChartRef, 'x' | 'y'> & {
    width: number;
    height: number;
};
export interface ICompositeGridItem extends GridItem {
    offsetX: number;
    offsetY: number;
}
export interface ICompositeGridLayout {
    width: number;
    height: number;
    items: ICompositeGridItem[];
}
export declare function getCompositeGridLayout(items: GridItem[]): ICompositeGridLayout | null;
export declare function combineCanvases(canvases: HTMLCanvasElement[], refs: IVegaChartRef[]): HTMLCanvasElement | null;
export declare function combineSVGs(svgs: string[], refs: IVegaChartRef[]): string | null;
export declare const useVegaExportApi: (name: string | undefined, viewsRef: RefObject<IVegaChartRef[]>, ref: ForwardedRef<IReactVegaHandler>, renderTaskRefs: RefObject<Promise<unknown>[]>, containerRef: RefObject<HTMLDivElement | null>) => void;
export {};