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mapnik_geometry.cpp
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301 lines (264 loc) · 10.1 KB
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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2015 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
*
*****************************************************************************/
#include <mapnik/config.hpp>
#include "boost_std_shared_shim.hpp"
#pragma GCC diagnostic push
#include <mapnik/warning_ignore.hpp>
#include <boost/python.hpp>
#include <boost/noncopyable.hpp>
#include <boost/python/def.hpp>
#include <boost/python/exception_translator.hpp>
#include <boost/python/manage_new_object.hpp>
#include <boost/python/iterator.hpp>
#pragma GCC diagnostic pop
// mapnik
#include <mapnik/geometry.hpp>
#include <mapnik/geometry/geometry_type.hpp>
#include <mapnik/geometry/envelope.hpp>
#include <mapnik/geometry/is_valid.hpp>
#include <mapnik/geometry/is_simple.hpp>
#include <mapnik/geometry/is_empty.hpp>
#include <mapnik/geometry/correct.hpp>
#include <mapnik/geometry/centroid.hpp>
#include <mapnik/wkt/wkt_factory.hpp> // from_wkt
#include <mapnik/json/geometry_parser.hpp> // from_geojson
#include <mapnik/util/geometry_to_geojson.hpp> // to_geojson
#include <mapnik/util/geometry_to_wkb.hpp> // to_wkb
#include <mapnik/util/geometry_to_wkt.hpp> // to_wkt
//#include <mapnik/util/geometry_to_svg.hpp>
#include <mapnik/wkb.hpp>
// stl
#include <stdexcept>
namespace {
std::shared_ptr<mapnik::geometry::geometry<double> > from_wkb_impl(std::string const& wkb)
{
std::shared_ptr<mapnik::geometry::geometry<double> > geom = std::make_shared<mapnik::geometry::geometry<double> >();
try
{
*geom = mapnik::geometry_utils::from_wkb(wkb.c_str(), wkb.size());
}
catch (...)
{
throw std::runtime_error("Failed to parse WKB");
}
return geom;
}
std::shared_ptr<mapnik::geometry::geometry<double> > from_wkt_impl(std::string const& wkt)
{
std::shared_ptr<mapnik::geometry::geometry<double> > geom = std::make_shared<mapnik::geometry::geometry<double> >();
if (!mapnik::from_wkt(wkt, *geom))
throw std::runtime_error("Failed to parse WKT geometry");
return geom;
}
std::shared_ptr<mapnik::geometry::geometry<double> > from_geojson_impl(std::string const& json)
{
std::shared_ptr<mapnik::geometry::geometry<double> > geom = std::make_shared<mapnik::geometry::geometry<double> >();
if (!mapnik::json::from_geojson(json, *geom))
throw std::runtime_error("Failed to parse geojson geometry");
return geom;
}
}
inline std::string boost_version()
{
std::ostringstream s;
s << BOOST_VERSION/100000 << "." << BOOST_VERSION/100 % 1000 << "." << BOOST_VERSION % 100;
return s.str();
}
PyObject* to_wkb_impl(mapnik::geometry::geometry<double> const& geom, mapnik::wkbByteOrder byte_order)
{
mapnik::util::wkb_buffer_ptr wkb = mapnik::util::to_wkb(geom,byte_order);
if (wkb)
{
return
#if PY_VERSION_HEX >= 0x03000000
::PyBytes_FromStringAndSize
#else
::PyString_FromStringAndSize
#endif
((const char*)wkb->buffer(),wkb->size());
}
else
{
Py_RETURN_NONE;
}
}
std::string to_geojson_impl(mapnik::geometry::geometry<double> const& geom)
{
std::string wkt;
if (!mapnik::util::to_geojson(wkt, geom))
{
throw std::runtime_error("Generate JSON failed");
}
return wkt;
}
std::string to_wkt_impl(mapnik::geometry::geometry<double> const& geom)
{
std::string wkt;
if (!mapnik::util::to_wkt(wkt,geom))
{
throw std::runtime_error("Generate WKT failed");
}
return wkt;
}
mapnik::geometry::geometry_types geometry_type_impl(mapnik::geometry::geometry<double> const& geom)
{
return mapnik::geometry::geometry_type(geom);
}
mapnik::box2d<double> geometry_envelope_impl(mapnik::geometry::geometry<double> const& geom)
{
return mapnik::geometry::envelope(geom);
}
// Mapnik requires Boost >= 1.58 for the is_valid and is_simple functions
#if BOOST_VERSION >= 105800
bool geometry_is_valid_impl(mapnik::geometry::geometry<double> const& geom)
{
return mapnik::geometry::is_valid(geom);
}
bool geometry_is_simple_impl(mapnik::geometry::geometry<double> const& geom)
{
return mapnik::geometry::is_simple(geom);
}
#endif
bool geometry_is_empty_impl(mapnik::geometry::geometry<double> const& geom)
{
return mapnik::geometry::is_empty(geom);
}
void geometry_correct_impl(mapnik::geometry::geometry<double> & geom)
{
mapnik::geometry::correct(geom);
}
void line_string_add_coord_impl1(mapnik::geometry::line_string<double> & l, double x, double y)
{
l.emplace_back(x, y);
}
void line_string_add_coord_impl2(mapnik::geometry::line_string<double> & l, mapnik::geometry::point<double> const& p)
{
l.push_back(p);
}
void linear_ring_add_coord_impl1(mapnik::geometry::linear_ring<double> & l, double x, double y)
{
l.emplace_back(x, y);
}
void linear_ring_add_coord_impl2(mapnik::geometry::linear_ring<double> & l, mapnik::geometry::point<double> const& p)
{
l.push_back(p);
}
void polygon_add_ring_impl(mapnik::geometry::polygon<double> & poly, mapnik::geometry::linear_ring<double> const& ring)
{
poly.push_back(ring); // copy
}
mapnik::geometry::point<double> geometry_centroid_impl(mapnik::geometry::geometry<double> const& geom)
{
mapnik::geometry::point<double> pt;
mapnik::geometry::centroid(geom, pt);
return pt;
}
void export_geometry()
{
using namespace boost::python;
implicitly_convertible<mapnik::geometry::point<double>, mapnik::geometry::geometry<double> >();
implicitly_convertible<mapnik::geometry::line_string<double>, mapnik::geometry::geometry<double> >();
implicitly_convertible<mapnik::geometry::polygon<double>, mapnik::geometry::geometry<double> >();
enum_<mapnik::geometry::geometry_types>("GeometryType")
.value("Unknown",mapnik::geometry::geometry_types::Unknown)
.value("Point",mapnik::geometry::geometry_types::Point)
.value("LineString",mapnik::geometry::geometry_types::LineString)
.value("Polygon",mapnik::geometry::geometry_types::Polygon)
.value("MultiPoint",mapnik::geometry::geometry_types::MultiPoint)
.value("MultiLineString",mapnik::geometry::geometry_types::MultiLineString)
.value("MultiPolygon",mapnik::geometry::geometry_types::MultiPolygon)
.value("GeometryCollection",mapnik::geometry::geometry_types::GeometryCollection)
;
enum_<mapnik::wkbByteOrder>("wkbByteOrder")
.value("XDR",mapnik::wkbXDR)
.value("NDR",mapnik::wkbNDR)
;
using mapnik::geometry::geometry;
using mapnik::geometry::point;
using mapnik::geometry::line_string;
using mapnik::geometry::linear_ring;
using mapnik::geometry::polygon;
class_<point<double> >("Point", init<double, double>((arg("x"), arg("y")),
"Constructs a new Point object\n"))
.add_property("x", &point<double>::x, "X coordinate")
.add_property("y", &point<double>::y, "Y coordinate")
#if BOOST_VERSION >= 105800
.def("is_valid", &geometry_is_valid_impl)
.def("is_simple", &geometry_is_simple_impl)
#endif
.def("to_geojson",&to_geojson_impl)
.def("to_wkb",&to_wkb_impl)
.def("to_wkt",&to_wkt_impl)
;
class_<line_string<double> >("LineString", init<>(
"Constructs a new LineString object\n"))
.def("add_coord", &line_string_add_coord_impl1, "Adds coord x,y")
.def("add_point", &line_string_add_coord_impl2, "Adds point")
#if BOOST_VERSION >= 105800
.def("is_valid", &geometry_is_valid_impl)
.def("is_simple", &geometry_is_simple_impl)
#endif
.def("to_geojson",&to_geojson_impl)
.def("to_wkb",&to_wkb_impl)
.def("to_wkt",&to_wkt_impl)
;
class_<linear_ring<double> >("LinearRing", init<>(
"Constructs a new LinearRtring object\n"))
.def("add_coord", &linear_ring_add_coord_impl1, "Adds coord x,y")
.def("add_point", &linear_ring_add_coord_impl2, "Adds point")
;
class_<polygon<double> >("Polygon", init<>(
"Constructs a new Polygon object\n"))
.def("add_ring", &polygon_add_ring_impl, "Add ring")
.def("num_rings", &polygon<double>::size, "Number of rings")
#if BOOST_VERSION >= 105800
.def("is_valid", &geometry_is_valid_impl)
.def("is_simple", &geometry_is_simple_impl)
#endif
.def("to_geojson",&to_geojson_impl)
.def("to_wkb",&to_wkb_impl)
.def("to_wkt",&to_wkt_impl)
;
class_<geometry<double>, std::shared_ptr<geometry<double> >, boost::noncopyable>("Geometry",no_init)
.def("envelope",&geometry_envelope_impl)
.def("from_geojson", from_geojson_impl)
.def("from_wkt", from_wkt_impl)
.def("from_wkb", from_wkb_impl)
.staticmethod("from_geojson")
.staticmethod("from_wkt")
.staticmethod("from_wkb")
.def("__str__",&to_wkt_impl)
.def("type",&geometry_type_impl)
#if BOOST_VERSION >= 105800
.def("is_valid", &geometry_is_valid_impl)
.def("is_simple", &geometry_is_simple_impl)
#endif
.def("is_empty", &geometry_is_empty_impl)
.def("correct", &geometry_correct_impl)
.def("centroid",&geometry_centroid_impl)
.def("to_wkb",&to_wkb_impl)
.def("to_wkt",&to_wkt_impl)
.def("to_geojson",&to_geojson_impl)
//.def("to_svg",&to_svg)
// TODO add other geometry_type methods
;
}