71 lines
2.3 KiB
C++
71 lines
2.3 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) 2017 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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*
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* Initially developed by Sandro Santilli <strk@keybit.net> for CartoDB
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*
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*****************************************************************************/
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#ifndef PGRASTER_FEATURESET_HPP
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#define PGRASTER_FEATURESET_HPP
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// mapnik
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#include <mapnik/geometry/box2d.hpp>
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#include <mapnik/datasource.hpp>
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#include <mapnik/feature.hpp>
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#include <mapnik/unicode.hpp>
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// stl
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#include <memory>
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using mapnik::Featureset;
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using mapnik::box2d;
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using mapnik::feature_ptr;
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using mapnik::raster_ptr;
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using mapnik::transcoder;
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using mapnik::context_ptr;
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class IResultSet;
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class pgraster_featureset : public mapnik::Featureset
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{
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public:
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/// @param bandno band number (1-based). 0 (default) reads all bands.
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/// Anything else forces interpretation of colors off
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/// (values copied verbatim)
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pgraster_featureset(std::shared_ptr<IResultSet> const& rs,
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context_ptr const& ctx,
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std::string const& encoding,
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bool key_field = false,
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int bandno = 0);
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feature_ptr next();
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~pgraster_featureset();
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private:
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std::shared_ptr<IResultSet> rs_;
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context_ptr ctx_;
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const std::unique_ptr<mapnik::transcoder> tr_;
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mapnik::value_integer feature_id_;
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bool key_field_;
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int band_;
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};
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#endif // PGRASTER_FEATURESET_HPP
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