/* -*-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_EXT_TERRAIN_SHADER_H
#define OSGEARTH_EXT_TERRAIN_SHADER_H 1

#include "TerrainShaderOptions"
#include <osgEarth/Extension>
#include <osgEarth/MapNode>
#include <osgEarth/TerrainEffect>

namespace osgEarth { namespace TerrainShader
{
    using namespace osgEarth;

    class TerrainShaderExtension : public Extension,
                                   public ExtensionInterface<MapNode>,
                                   public TerrainShaderOptions
    {
    public:
        META_OE_Extension(osgEarth, TerrainShaderExtension, terrainshader);

        // CTORs
        TerrainShaderExtension();
        TerrainShaderExtension(const TerrainShaderOptions& options);

        // DTOR
        virtual ~TerrainShaderExtension();


    public: // Extension

        virtual void setDBOptions(const osgDB::Options* dbOptions);

        virtual const ConfigOptions& getConfigOptions() const { return *this; }

    public: // ExtensionInterface<MapNode>

        bool connect(MapNode* mapNode);

        bool disconnect(MapNode* mapNode);

    private:
        osg::ref_ptr<const osgDB::Options> _dbOptions;
        osg::ref_ptr<TerrainEffect>        _effect;
    };

} } // namespace osgEarth::TerrainShader

#endif // OSGEARTH_EXT_TERRAIN_SHADER_H