mirror of
https://github.com/mapnik/mapnik.git
synced 2025-09-09 12:34:45 +02:00
140 lines
3.9 KiB
C++
140 lines
3.9 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2024 Artem Pavlenko
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#ifndef MAPNIK_VERTEX_ADAPTERS_HPP
|
|
#define MAPNIK_VERTEX_ADAPTERS_HPP
|
|
|
|
#include <mapnik/geometry.hpp>
|
|
#include <mapnik/geometry/geometry_types.hpp>
|
|
#include <mapnik/vertex.hpp>
|
|
|
|
namespace mapnik {
|
|
namespace geometry {
|
|
|
|
template<typename T>
|
|
struct point_vertex_adapter
|
|
{
|
|
using coordinate_type = T;
|
|
point_vertex_adapter(point<T> const& pt);
|
|
unsigned vertex(coordinate_type* x, coordinate_type* y) const;
|
|
void rewind(unsigned) const;
|
|
geometry_types type() const;
|
|
point<T> const& pt_;
|
|
mutable bool first_;
|
|
};
|
|
|
|
template<typename T>
|
|
struct line_string_vertex_adapter
|
|
{
|
|
using coordinate_type = T;
|
|
line_string_vertex_adapter(line_string<T> const& line);
|
|
unsigned vertex(coordinate_type* x, coordinate_type* y) const;
|
|
void rewind(unsigned) const;
|
|
geometry_types type() const;
|
|
line_string<T> const& line_;
|
|
mutable std::size_t current_index_;
|
|
const std::size_t end_index_;
|
|
};
|
|
|
|
template<typename T>
|
|
struct polygon_vertex_adapter
|
|
{
|
|
using coordinate_type = T;
|
|
polygon_vertex_adapter(polygon<T> const& poly);
|
|
void rewind(unsigned) const;
|
|
unsigned vertex(coordinate_type* x, coordinate_type* y) const;
|
|
geometry_types type() const;
|
|
|
|
private:
|
|
polygon<T> const& poly_;
|
|
mutable std::size_t rings_itr_;
|
|
mutable std::size_t rings_end_;
|
|
mutable std::size_t current_index_;
|
|
mutable std::size_t end_index_;
|
|
mutable bool start_loop_;
|
|
};
|
|
|
|
template<typename T>
|
|
struct ring_vertex_adapter
|
|
{
|
|
using coordinate_type = T;
|
|
ring_vertex_adapter(linear_ring<T> const& ring);
|
|
void rewind(unsigned) const;
|
|
unsigned vertex(coordinate_type* x, coordinate_type* y) const;
|
|
geometry_types type() const;
|
|
|
|
private:
|
|
linear_ring<T> const& ring_;
|
|
mutable std::size_t current_index_;
|
|
mutable std::size_t end_index_;
|
|
mutable bool start_loop_;
|
|
};
|
|
|
|
extern template struct MAPNIK_DECL point_vertex_adapter<double>;
|
|
extern template struct MAPNIK_DECL line_string_vertex_adapter<double>;
|
|
extern template struct MAPNIK_DECL polygon_vertex_adapter<double>;
|
|
extern template struct MAPNIK_DECL ring_vertex_adapter<double>;
|
|
|
|
template<typename T>
|
|
struct vertex_adapter_traits
|
|
{};
|
|
|
|
template<>
|
|
struct vertex_adapter_traits<point<double>>
|
|
{
|
|
using type = point_vertex_adapter<double>;
|
|
};
|
|
|
|
template<>
|
|
struct vertex_adapter_traits<line_string<double>>
|
|
{
|
|
using type = line_string_vertex_adapter<double>;
|
|
};
|
|
|
|
template<>
|
|
struct vertex_adapter_traits<polygon<double>>
|
|
{
|
|
using type = polygon_vertex_adapter<double>;
|
|
};
|
|
|
|
template<>
|
|
struct vertex_adapter_traits<multi_point<double>>
|
|
{
|
|
using type = point_vertex_adapter<double>;
|
|
};
|
|
|
|
template<>
|
|
struct vertex_adapter_traits<multi_line_string<double>>
|
|
{
|
|
using type = line_string_vertex_adapter<double>;
|
|
};
|
|
|
|
template<>
|
|
struct vertex_adapter_traits<multi_polygon<double>>
|
|
{
|
|
using type = polygon_vertex_adapter<double>;
|
|
};
|
|
|
|
} // namespace geometry
|
|
} // namespace mapnik
|
|
|
|
#endif // MAPNIK_VERTEX_ADAPTERS_HPP
|