Libosmium  2.15.0
Fast and flexible C++ library for working with OpenStreetMap data
ogr.hpp
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1 #ifndef OSMIUM_GEOM_OGR_HPP
2 #define OSMIUM_GEOM_OGR_HPP
3 
4 /*
5 
6 This file is part of Osmium (https://osmcode.org/libosmium).
7 
8 Copyright 2013-2018 Jochen Topf <jochen@topf.org> and others (see README).
9 
10 Boost Software License - Version 1.0 - August 17th, 2003
11 
12 Permission is hereby granted, free of charge, to any person or organization
13 obtaining a copy of the software and accompanying documentation covered by
14 this license (the "Software") to use, reproduce, display, distribute,
15 execute, and transmit the Software, and to prepare derivative works of the
16 Software, and to permit third-parties to whom the Software is furnished to
17 do so, all subject to the following:
18 
19 The copyright notices in the Software and this entire statement, including
20 the above license grant, this restriction and the following disclaimer,
21 must be included in all copies of the Software, in whole or in part, and
22 all derivative works of the Software, unless such copies or derivative
23 works are solely in the form of machine-executable object code generated by
24 a source language processor.
25 
26 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
29 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
30 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
31 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
32 DEALINGS IN THE SOFTWARE.
33 
34 */
35 
46 #include <osmium/geom/factory.hpp>
47 
48 #include <ogr_geometry.h>
49 
50 #include <cassert>
51 #include <cstddef>
52 #include <memory>
53 #include <utility>
54 
55 namespace osmium {
56 
57  namespace geom {
58 
59  namespace detail {
60 
61  class OGRFactoryImpl {
62 
63  public:
64 
65  using point_type = std::unique_ptr<OGRPoint>;
66  using linestring_type = std::unique_ptr<OGRLineString>;
67  using polygon_type = std::unique_ptr<OGRPolygon>;
68  using multipolygon_type = std::unique_ptr<OGRMultiPolygon>;
69  using ring_type = std::unique_ptr<OGRLinearRing>;
70 
71  private:
72 
73  linestring_type m_linestring{nullptr};
74  multipolygon_type m_multipolygon{nullptr};
75  polygon_type m_polygon{nullptr};
76  ring_type m_ring{nullptr};
77 
78  public:
79 
80  explicit OGRFactoryImpl(int /* srid */) {
81  }
82 
83  /* Point */
84 
85  point_type make_point(const osmium::geom::Coordinates& xy) const {
86  return point_type{new OGRPoint{xy.x, xy.y}};
87  }
88 
89  /* LineString */
90 
91  void linestring_start() {
92  m_linestring.reset(new OGRLineString{});
93  }
94 
95  void linestring_add_location(const osmium::geom::Coordinates& xy) {
96  assert(!!m_linestring);
97  m_linestring->addPoint(xy.x, xy.y);
98  }
99 
100  linestring_type linestring_finish(size_t /* num_points */) {
101  assert(!!m_linestring);
102  return std::move(m_linestring);
103  }
104 
105  /* Polygon */
106 
107  void polygon_start() {
108  m_ring.reset(new OGRLinearRing{});
109  }
110 
111  void polygon_add_location(const osmium::geom::Coordinates& xy) {
112  assert(!!m_ring);
113  m_ring->addPoint(xy.x, xy.y);
114  }
115 
116  polygon_type polygon_finish(size_t /* num_points */) {
117  auto polygon = std::unique_ptr<OGRPolygon>{new OGRPolygon{}};
118  polygon->addRingDirectly(m_ring.release());
119  return polygon;
120  }
121 
122  /* MultiPolygon */
123 
124  void multipolygon_start() {
125  m_multipolygon.reset(new OGRMultiPolygon{});
126  }
127 
128  void multipolygon_polygon_start() {
129  m_polygon.reset(new OGRPolygon{});
130  }
131 
132  void multipolygon_polygon_finish() {
133  assert(!!m_multipolygon);
134  assert(!!m_polygon);
135  m_multipolygon->addGeometryDirectly(m_polygon.release());
136  }
137 
138  void multipolygon_outer_ring_start() {
139  m_ring.reset(new OGRLinearRing{});
140  }
141 
142  void multipolygon_outer_ring_finish() {
143  assert(!!m_polygon);
144  assert(!!m_ring);
145  m_polygon->addRingDirectly(m_ring.release());
146  }
147 
148  void multipolygon_inner_ring_start() {
149  m_ring.reset(new OGRLinearRing{});
150  }
151 
152  void multipolygon_inner_ring_finish() {
153  assert(!!m_polygon);
154  assert(!!m_ring);
155  m_polygon->addRingDirectly(m_ring.release());
156  }
157 
158  void multipolygon_add_location(const osmium::geom::Coordinates& xy) {
159  assert(!!m_polygon);
160  assert(!!m_ring);
161  m_ring->addPoint(xy.x, xy.y);
162  }
163 
164  multipolygon_type multipolygon_finish() {
165  assert(!!m_multipolygon);
166  return std::move(m_multipolygon);
167  }
168 
169  }; // class OGRFactoryImpl
170 
171  } // namespace detail
172 
173  template <typename TProjection = IdentityProjection>
175 
176  } // namespace geom
177 
178 } // namespace osmium
179 
180 #endif // OSMIUM_GEOM_OGR_HPP
double y
Definition: coordinates.hpp:51
Definition: factory.hpp:148
Namespace for everything in the Osmium library.
Definition: assembler.hpp:53
Definition: attr.hpp:333
Definition: coordinates.hpp:48
double x
Definition: coordinates.hpp:50