Libosmium  2.20.0
Fast and flexible C++ library for working with OpenStreetMap data
geos.hpp
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1 #ifndef OSMIUM_GEOM_GEOS_HPP
2 #define OSMIUM_GEOM_GEOS_HPP
3 
4 /*
5 
6 This file is part of Osmium (https://osmcode.org/libosmium).
7 
8 Copyright 2013-2023 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 
36 #include <geos/version.h>
37 #if defined(GEOS_VERSION_MAJOR) && defined(GEOS_VERSION_MINOR) && (GEOS_VERSION_MAJOR < 3 || (GEOS_VERSION_MAJOR == 3 && GEOS_VERSION_MINOR <= 5))
38 
39 #define OSMIUM_WITH_GEOS
40 
56 #include <osmium/geom/factory.hpp>
57 
58 #include <geos/geom/Coordinate.h>
59 #include <geos/geom/CoordinateSequence.h>
60 #include <geos/geom/CoordinateSequenceFactory.h>
61 #include <geos/geom/GeometryFactory.h>
62 #include <geos/geom/LinearRing.h>
63 #include <geos/geom/MultiPolygon.h>
64 #include <geos/geom/Point.h>
65 #include <geos/geom/Polygon.h>
66 #include <geos/geom/PrecisionModel.h>
67 #include <geos/util/GEOSException.h>
68 
69 #include <algorithm>
70 #include <cassert>
71 #include <cstddef>
72 #include <exception>
73 #include <iterator>
74 #include <memory>
75 #include <string>
76 #include <utility>
77 #include <vector>
78 
79 namespace osmium {
80 
81  struct geos_geometry_error : public geometry_error {
82 
83  explicit geos_geometry_error(const char* message) :
84  geometry_error(std::string{"geometry creation failed in GEOS library: "} + message) {
85  }
86 
87  }; // struct geos_geometry_error
88 
89  namespace geom {
90 
91  namespace detail {
92 
94  class GEOSFactoryImpl {
95 
96  std::unique_ptr<const geos::geom::PrecisionModel> m_precision_model;
97  std::unique_ptr<geos::geom::GeometryFactory> m_our_geos_factory;
98  geos::geom::GeometryFactory* m_geos_factory;
99 
100  std::unique_ptr<geos::geom::CoordinateSequence> m_coordinate_sequence;
101  std::vector<std::unique_ptr<geos::geom::LinearRing>> m_rings;
102  std::vector<std::unique_ptr<geos::geom::Polygon>> m_polygons;
103 
104  public:
105 
106  using point_type = std::unique_ptr<geos::geom::Point>;
107  using linestring_type = std::unique_ptr<geos::geom::LineString>;
108  using polygon_type = std::unique_ptr<geos::geom::Polygon>;
109  using multipolygon_type = std::unique_ptr<geos::geom::MultiPolygon>;
110  using ring_type = std::unique_ptr<geos::geom::LinearRing>;
111 
112  explicit GEOSFactoryImpl(int /* srid */, geos::geom::GeometryFactory& geos_factory) :
113  m_precision_model(nullptr),
114  m_our_geos_factory(nullptr),
115  m_geos_factory(&geos_factory) {
116  }
117 
118  explicit GEOSFactoryImpl(int srid) :
119  m_precision_model(new geos::geom::PrecisionModel),
120  m_our_geos_factory(new geos::geom::GeometryFactory{m_precision_model.get(), srid}),
121  m_geos_factory(m_our_geos_factory.get()) {
122  }
123 
124  /* Point */
125 
126  point_type make_point(const osmium::geom::Coordinates& xy) const {
127  try {
128  return point_type{m_geos_factory->createPoint(geos::geom::Coordinate{xy.x, xy.y})};
129  } catch (const geos::util::GEOSException& e) {
130  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
131  }
132  }
133 
134  /* LineString */
135 
136  void linestring_start() {
137  try {
138  m_coordinate_sequence.reset(m_geos_factory->getCoordinateSequenceFactory()->create(static_cast<std::size_t>(0), 2));
139  } catch (const geos::util::GEOSException& e) {
140  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
141  }
142  }
143 
144  void linestring_add_location(const osmium::geom::Coordinates& xy) {
145  try {
146  m_coordinate_sequence->add(geos::geom::Coordinate{xy.x, xy.y});
147  } catch (const geos::util::GEOSException& e) {
148  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
149  }
150  }
151 
152  linestring_type linestring_finish(std::size_t /* num_points */) {
153  try {
154  return linestring_type{m_geos_factory->createLineString(m_coordinate_sequence.release())};
155  } catch (const geos::util::GEOSException& e) {
156  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
157  }
158  }
159 
160  /* MultiPolygon */
161 
162  void multipolygon_start() {
163  m_polygons.clear();
164  }
165 
166  void multipolygon_polygon_start() {
167  m_rings.clear();
168  }
169 
170  void multipolygon_polygon_finish() {
171  try {
172  assert(!m_rings.empty());
173  auto inner_rings = new std::vector<geos::geom::Geometry*>;
174  std::transform(std::next(m_rings.begin(), 1), m_rings.end(), std::back_inserter(*inner_rings), [](std::unique_ptr<geos::geom::LinearRing>& r) {
175  return r.release();
176  });
177  m_polygons.emplace_back(m_geos_factory->createPolygon(m_rings[0].release(), inner_rings));
178  m_rings.clear();
179  } catch (const geos::util::GEOSException& e) {
180  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
181  }
182  }
183 
184  void multipolygon_outer_ring_start() {
185  try {
186  m_coordinate_sequence.reset(m_geos_factory->getCoordinateSequenceFactory()->create(static_cast<std::size_t>(0), 2));
187  } catch (const geos::util::GEOSException& e) {
188  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
189  }
190  }
191 
192  void multipolygon_outer_ring_finish() {
193  try {
194  m_rings.emplace_back(m_geos_factory->createLinearRing(m_coordinate_sequence.release()));
195  } catch (const geos::util::GEOSException& e) {
196  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
197  }
198  }
199 
200  void multipolygon_inner_ring_start() {
201  try {
202  m_coordinate_sequence.reset(m_geos_factory->getCoordinateSequenceFactory()->create(static_cast<std::size_t>(0), 2));
203  } catch (const geos::util::GEOSException& e) {
204  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
205  }
206  }
207 
208  void multipolygon_inner_ring_finish() {
209  try {
210  m_rings.emplace_back(m_geos_factory->createLinearRing(m_coordinate_sequence.release()));
211  } catch (const geos::util::GEOSException& e) {
212  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
213  }
214  }
215 
216  void multipolygon_add_location(const osmium::geom::Coordinates& xy) {
217  try {
218  m_coordinate_sequence->add(geos::geom::Coordinate{xy.x, xy.y});
219  } catch (const geos::util::GEOSException& e) {
220  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
221  }
222  }
223 
224  multipolygon_type multipolygon_finish() {
225  try {
226  auto polygons = new std::vector<geos::geom::Geometry*>;
227  std::transform(m_polygons.begin(), m_polygons.end(), std::back_inserter(*polygons), [](std::unique_ptr<geos::geom::Polygon>& p) {
228  return p.release();
229  });
230  m_polygons.clear();
231  return multipolygon_type{m_geos_factory->createMultiPolygon(polygons)};
232  } catch (const geos::util::GEOSException& e) {
233  std::throw_with_nested(osmium::geos_geometry_error(e.what()));
234  }
235  }
236 
237  }; // class GEOSFactoryImpl
238 
239  } // namespace detail
240 
242  template <typename TProjection = IdentityProjection>
243  using GEOSFactory = GeometryFactory<osmium::geom::detail::GEOSFactoryImpl, TProjection>;
244 
245  } // namespace geom
246 
247 } // namespace osmium
248 
249 #endif
250 
251 #endif // OSMIUM_GEOM_GEOS_HPP
Definition: attr.hpp:342
OSMIUM_DEPRECATED Coordinates transform(const CRS &src, const CRS &dest, Coordinates c)
Definition: projection.hpp:125
Namespace for everything in the Osmium library.
Definition: assembler.hpp:53
Definition: location.hpp:555
Definition: coordinates.hpp:48
double y
Definition: coordinates.hpp:51
double x
Definition: coordinates.hpp:50