/* -*-c++-*- */
/* osgEarth - Geospatial SDK for OpenSceneGraph
 * Copyright 2020 Pelican Mapping
 * http://osgearth.org
 *
 * osgEarth is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

#ifndef OSGEARTH_ELEVATION_RANGES_H
#define OSGEARTH_ELEVATION_RANGES_H 1

#include <osgEarth/Common>
#include <osgEarth/Profile>

namespace osgEarth
{
    /**
    * An approximate, fast index of the min/max elevation of the entire world.
    */
    class OSGEARTH_EXPORT ElevationRanges : public osg::Referenced
    {
    public:        
        // The maximum level that we have index data for.
        static unsigned int getMaxLevel();

        // Always global-geodetic
        static osg::ref_ptr<const Profile> getProfile();

        // Gets the min/max elevation at the given tile key index.
        static bool getElevationRange(unsigned int level, unsigned int x, unsigned int y, short& min, short& max);      

        // Get the default min/max elevation range if no index data is available.
        static bool getDefaultElevationRange(short& min, short& max);
    };

} // namespace osgEarth

#endif