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69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
// SPDX-License-Identifier: LGPL-2.1-or-later
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/*****************************************************************************
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*
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* This file is part of Mapnik Vector Tile Plugin
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*
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* Copyright (C) 2023 Geofabrik GmbH
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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 PMTILES_FEATURESET_HPP_
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#define PMTILES_FEATURESET_HPP_
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#include <memory>
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// mapnik
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#include <mapnik/feature.hpp>
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#include <mapnik/datasource.hpp>
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// sqlite
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#include "sqlite_connection.hpp"
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#include "mvt_io.hpp"
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#include "pmtiles_file.hpp"
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class pmtiles_featureset : public mapnik::Featureset
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{
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public:
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pmtiles_featureset(std::shared_ptr<mapnik::pmtiles_file> file_ptr,
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mapnik::context_ptr const& ctx,
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const int zoom,
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mapnik::box2d<double> const& extent,
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const std::string & layer);
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virtual ~pmtiles_featureset();
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mapnik::feature_ptr next();
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private:
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mapnik::feature_ptr next_feature();
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bool valid() const;
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std::shared_ptr<mapnik::pmtiles_file> file_ptr_;
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mapnik::context_ptr context_;
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int zoom_;
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mapnik::box2d<double> const& extent_;
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const std::string& layer_;
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std::unique_ptr<mvt_io> vector_tile_;
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int xmin_;
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int xmax_;
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int ymin_;
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int ymax_;
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/// x index of the currently accessed tile
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int x_ = 0;
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/// y index of the currently accessed tile
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int y_ = 0;
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bool next_tile();
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bool open_tile();
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};
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#endif /* PMTILES_FEATURESET_HPP_ */
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