93 lines
2.7 KiB
C++
93 lines
2.7 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) 2024 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 SHAPE_INDEX_FEATURESET_HPP
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#define SHAPE_INDEX_FEATURESET_HPP
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// stl
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#include <set>
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#include <vector>
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// mapnik
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#include <mapnik/geom_util.hpp>
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#include <mapnik/feature.hpp>
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#include <mapnik/unicode.hpp>
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#include <mapnik/value/types.hpp>
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// boost
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#include <boost/utility.hpp>
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#include "shape_datasource.hpp"
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#include "shape_io.hpp"
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using mapnik::box2d;
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using mapnik::context_ptr;
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using mapnik::feature_ptr;
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using mapnik::Featureset;
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namespace mapnik {
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namespace detail {
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struct node
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{
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node() = default;
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node(std::uint64_t offset_, std::int32_t start_, std::int32_t end_, box2d<float>&& box_)
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: offset(offset_)
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, start(start_)
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, end(end_)
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, box(std::move(box_))
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{}
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std::uint64_t offset;
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std::int32_t start;
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std::int32_t end;
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mapnik::box2d<float> box;
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};
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} // namespace detail
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} // namespace mapnik
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template<typename filterT>
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class shape_index_featureset : public Featureset
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{
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public:
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shape_index_featureset(filterT const& filter,
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std::unique_ptr<shape_io>&& shape_ptr,
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std::set<std::string> const& attribute_names,
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std::string const& encoding,
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std::string const& shape_name,
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int row_limit);
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virtual ~shape_index_featureset();
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feature_ptr next();
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private:
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filterT filter_;
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context_ptr ctx_;
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std::unique_ptr<shape_io> shape_ptr_;
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const std::unique_ptr<mapnik::transcoder> tr_;
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std::vector<mapnik::detail::node> positions_;
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std::vector<mapnik::detail::node>::iterator itr_;
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std::vector<int> attr_ids_;
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mapnik::value_integer row_limit_;
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mutable int count_;
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mutable box2d<double> feature_bbox_;
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};
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#endif // SHAPE_INDEX_FEATURESET_HPP
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