import type { IPoint, IViewport, TransformMatrix } from '../abstraction';
export declare class Viewport implements IViewport {
    private _start;
    private _end;
    constructor(start?: IPoint, end?: IPoint);
    get start(): IPoint;
    get end(): IPoint;
    get width(): number;
    get height(): number;
    clamp(x: number, y: number): IPoint;
    change(start: IPoint, end: IPoint): void;
    transform(transform: TransformMatrix): IViewport;
    isInView(x: number, y: number): boolean;
}