8ce7a1c43d
e.g `mapnik::geometry::centroid()` -> `$(MAPNIK_SOURCE)/include/mapnik/geometry/centroid.hpp`
136 lines
3.9 KiB
C++
136 lines
3.9 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) 2015 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 MAPNIK_VERTEX_ADAPTERS_HPP
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#define MAPNIK_VERTEX_ADAPTERS_HPP
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#include <mapnik/geometry.hpp>
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#include <mapnik/geometry/geometry_types.hpp>
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#include <mapnik/vertex.hpp>
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namespace mapnik { namespace geometry {
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template <typename T>
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struct point_vertex_adapter
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{
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using coord_type = typename point<T>::coord_type;
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point_vertex_adapter(point<T> const& pt);
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unsigned vertex(coord_type * x, coord_type * y) const;
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void rewind(unsigned) const;
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geometry_types type () const;
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point<T> const& pt_;
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mutable bool first_;
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};
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template <typename T>
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struct line_string_vertex_adapter
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{
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using coord_type = typename point<T>::coord_type;
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line_string_vertex_adapter(line_string<T> const& line);
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unsigned vertex(coord_type * x, coord_type * y) const;
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void rewind(unsigned) const;
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geometry_types type () const;
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line_string<T> const& line_;
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mutable std::size_t current_index_;
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const std::size_t end_index_;
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};
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template <typename T>
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struct polygon_vertex_adapter
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{
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using coord_type = typename point<T>::coord_type;
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polygon_vertex_adapter(polygon<T> const& poly);
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void rewind(unsigned) const;
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unsigned vertex(coord_type * x, coord_type * y) const;
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geometry_types type () const;
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private:
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polygon<T> const& poly_;
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mutable std::size_t rings_itr_;
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mutable std::size_t rings_end_;
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mutable std::size_t current_index_;
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mutable std::size_t end_index_;
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mutable bool start_loop_;
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};
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template <typename T>
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struct ring_vertex_adapter
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{
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using coord_type = typename point<T>::coord_type;
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ring_vertex_adapter(linear_ring<T> const& ring);
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void rewind(unsigned) const;
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unsigned vertex(coord_type * x, coord_type * y) const;
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geometry_types type () const;
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private:
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linear_ring<T> const& ring_;
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mutable std::size_t current_index_;
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mutable std::size_t end_index_;
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mutable bool start_loop_;
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};
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extern template struct MAPNIK_DECL point_vertex_adapter<double>;
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extern template struct MAPNIK_DECL line_string_vertex_adapter<double>;
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extern template struct MAPNIK_DECL polygon_vertex_adapter<double>;
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extern template struct MAPNIK_DECL ring_vertex_adapter<double>;
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template <typename T>
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struct vertex_adapter_traits {};
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template <>
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struct vertex_adapter_traits<point<double> >
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{
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using type = point_vertex_adapter<double>;
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};
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template <>
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struct vertex_adapter_traits<line_string<double> >
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{
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using type = line_string_vertex_adapter<double>;
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};
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template <>
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struct vertex_adapter_traits<polygon<double> >
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{
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using type = polygon_vertex_adapter<double>;
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};
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template <>
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struct vertex_adapter_traits<multi_point<double> >
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{
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using type = point_vertex_adapter<double>;
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};
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template <>
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struct vertex_adapter_traits<multi_line_string<double> >
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{
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using type = line_string_vertex_adapter<double>;
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};
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template <>
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struct vertex_adapter_traits<multi_polygon<double> >
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{
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using type = polygon_vertex_adapter<double>;
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};
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}}
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#endif //MAPNIK_VERTEX_ADAPTERS_HPP
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