/*
 * Copyright (C) 2019 - 2025 Devexperts Solutions IE Limited
 * This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
 * If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */
import { ViewportModelState, Zoom } from './viewport.model';
export type ZoomXToZoomYRatio = number;
export declare const ratioFromZoomXY: (zoomX: Zoom, zoomY: Zoom) => ZoomXToZoomYRatio;
export declare const zoomXToZoomY: (zoomX: Zoom, ratio: ZoomXToZoomYRatio) => Zoom;
export declare const zoomYToZoomX: (zoomY: Zoom, ratio: ZoomXToZoomYRatio) => Zoom;
/**
 * Locks the zoomY with zoomX and zooms y-scale depending on x-scale.
 * @param prevState
 * @param newState
 */
export declare const changeYToKeepRatio: (prevState: ViewportModelState, newState: ViewportModelState) => void;
/**
 *  Locks the zoomY with zoomX and zooms x-scale depending on y-scale.
 * @param prevState
 * @param newState
 */
export declare const changeXToKeepRatio: (prevState: ViewportModelState, newState: ViewportModelState) => void;