77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2021 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef GDAL_DATASOURCE_HPP
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#define GDAL_DATASOURCE_HPP
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// mapnik
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#include <mapnik/datasource.hpp>
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#include <mapnik/params.hpp>
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#include <mapnik/query.hpp>
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#include <mapnik/feature.hpp>
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#include <mapnik/geometry/box2d.hpp>
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#include <mapnik/coord.hpp>
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#include <mapnik/feature_layer_desc.hpp>
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#include <mapnik/datasource_plugin.hpp>
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// boost
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#include <boost/optional.hpp>
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// stl
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#include <vector>
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#include <string>
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// gdal
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#include <gdal_priv.h>
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DATASOURCE_PLUGIN_DEF(gdal_datasource_plugin, gdal);
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class gdal_datasource : public mapnik::datasource
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{
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public:
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gdal_datasource(mapnik::parameters const& params);
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virtual ~gdal_datasource();
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mapnik::datasource::datasource_t type() const override;
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static const char* name();
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mapnik::featureset_ptr features(mapnik::query const& q) const override;
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mapnik::featureset_ptr features_at_point(mapnik::coord2d const& pt, double tol = 0) const override;
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mapnik::box2d<double> envelope() const override;
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std::optional<mapnik::datasource_geometry_t> get_geometry_type() const override;
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mapnik::layer_descriptor get_descriptor() const override;
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private:
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std::unique_ptr<GDALDataset, decltype(&GDALClose)> dataset_;
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mapnik::box2d<double> extent_;
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std::string dataset_name_;
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int band_;
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mapnik::layer_descriptor desc_;
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unsigned width_;
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unsigned height_;
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double dx_;
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double dy_;
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int nbands_;
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bool shared_dataset_;
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std::optional<double> nodata_value_;
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double nodata_tolerance_;
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int64_t max_image_area_;
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};
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#endif // GDAL_DATASOURCE_HPP
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