/*****************************************************************************
 * 
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2007 Artem Pavlenko
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *****************************************************************************/
//$Id$

#ifndef GDAL_DATASOURCE_HPP
#define GDAL_DATASOURCE_HPP

// mapnik
#include <mapnik/datasource.hpp>

// boost
#include <boost/shared_ptr.hpp>

// gdal
#include <gdal_priv.h>

class gdal_datasource : public mapnik::datasource 
{
    public:
        gdal_datasource(mapnik::parameters const& params, bool bind=true);
        virtual ~gdal_datasource ();
        int type() const;
        static std::string name();
        mapnik::featureset_ptr features( mapnik::query const& q) const;
        mapnik::featureset_ptr features_at_point(mapnik::coord2d const& pt) const;
        mapnik::box2d<double> envelope() const;
        mapnik::layer_descriptor get_descriptor() const;
        void bind() const;
    private:
        mutable mapnik::box2d<double> extent_;
        std::string dataset_name_;
        mutable int band_;
        mapnik::layer_descriptor desc_;
        mutable unsigned width_;
        mutable unsigned height_;
        mutable double dx_;
        mutable double dy_;
        mutable int nbands_;
        mutable bool shared_dataset_;
        double filter_factor_;
        inline GDALDataset *open_dataset() const;
};


#endif // GDAL_DATASOURCE_HPP