export interface ModelViewportRenderer {
    getPixelRatio(): number;
    setPixelRatio(value: number): void;
    setSize(width: number, height: number, updateStyle: boolean): void;
}
export interface ModelViewportCamera {
    aspect: number;
    updateProjectionMatrix(): void;
}
export interface SyncModelViewportInput {
    renderer: ModelViewportRenderer;
    camera: ModelViewportCamera;
    stage: HTMLElement;
    canvas: HTMLCanvasElement;
    devicePixelRatio?: number;
}
export interface ModelViewportState {
    width: number;
    height: number;
    pixelRatio: number;
    resized: boolean;
}
export declare const syncModelViewport: ({ renderer, camera, stage, canvas, devicePixelRatio }: SyncModelViewportInput) => ModelViewportState;