252 lines
7.4 KiB
C++
252 lines
7.4 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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* 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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// boost
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#include <boost/python.hpp>
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#include <boost/python/def.hpp>
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#include <boost/python/exception_translator.hpp>
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#include <boost/python/manage_new_object.hpp>
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#include <boost/python/iterator.hpp>
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#include <boost/ptr_container/ptr_vector.hpp>
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#include <boost/make_shared.hpp>
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// mapnik
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#include <mapnik/geometry.hpp>
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#include <mapnik/wkt/wkt_factory.hpp>
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#include <mapnik/wkb.hpp>
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#include <mapnik/json/geometry_parser.hpp>
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#include <mapnik/json/geojson_generator.hpp>
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#include <boost/version.hpp>
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#if BOOST_VERSION >= 104700
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#include <mapnik/util/geometry_to_wkb.hpp>
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#include <mapnik/util/geometry_to_wkt.hpp>
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#endif
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namespace {
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using mapnik::from_wkt;
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using mapnik::geometry_type;
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typedef boost::ptr_vector<geometry_type> path_type;
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geometry_type const& getitem_impl(path_type & p, int key)
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{
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if (key >=0 && key < static_cast<int>(p.size()))
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return p[key];
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PyErr_SetString(PyExc_IndexError, "Index is out of range");
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throw boost::python::error_already_set();
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}
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void add_wkt_impl(path_type& p, std::string const& wkt)
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{
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if (!mapnik::from_wkt(wkt , p))
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throw std::runtime_error("Failed to parse WKT");
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}
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void add_wkb_impl(path_type& p, std::string const& wkb)
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{
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if (!mapnik::geometry_utils::from_wkb(p, wkb.c_str(), wkb.size()))
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throw std::runtime_error("Failed to parse WKB");
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}
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void add_geojson_impl(path_type& p, std::string const& json)
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{
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if (!mapnik::json::from_geojson(json, p))
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throw std::runtime_error("Failed to parse geojson geometry");
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}
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boost::shared_ptr<path_type> from_wkt_impl(std::string const& wkt)
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{
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boost::shared_ptr<path_type> paths = boost::make_shared<path_type>();
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if (!mapnik::from_wkt(wkt, *paths))
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throw std::runtime_error("Failed to parse WKT");
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return paths;
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}
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boost::shared_ptr<path_type> from_wkb_impl(std::string const& wkb)
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{
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boost::shared_ptr<path_type> paths = boost::make_shared<path_type>();
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if (!mapnik::geometry_utils::from_wkb(*paths, wkb.c_str(), wkb.size()))
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throw std::runtime_error("Failed to parse WKB");
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return paths;
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}
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boost::shared_ptr<path_type> from_geojson_impl(std::string const& json)
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{
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boost::shared_ptr<path_type> paths = boost::make_shared<path_type>();
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if (! mapnik::json::from_geojson(json, *paths))
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throw std::runtime_error("Failed to parse geojson geometry");
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return paths;
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}
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}
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inline std::string boost_version()
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{
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std::ostringstream s;
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s << BOOST_VERSION/100000 << "." << BOOST_VERSION/100 % 1000 << "." << BOOST_VERSION % 100;
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return s.str();
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}
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#if BOOST_VERSION >= 104700
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PyObject* to_wkb( geometry_type const& geom, mapnik::util::wkbByteOrder byte_order)
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{
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mapnik::util::wkb_buffer_ptr wkb = mapnik::util::to_wkb(geom,byte_order);
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if (wkb)
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{
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return
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#if PY_VERSION_HEX >= 0x03000000
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::PyBytes_FromStringAndSize
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#else
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::PyString_FromStringAndSize
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#endif
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((const char*)wkb->buffer(),wkb->size());
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}
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else
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{
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Py_RETURN_NONE;
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}
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}
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#else
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PyObject* to_wkb( geometry_type const& geom)
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{
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throw std::runtime_error("mapnik::to_wkb() requires at least boost 1.47 while your build was compiled against boost "
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+ boost_version());
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}
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#endif
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#if BOOST_VERSION >= 104700
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PyObject* to_wkb2( path_type const& p, mapnik::util::wkbByteOrder byte_order)
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{
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mapnik::util::wkb_buffer_ptr wkb = mapnik::util::to_wkb(p,byte_order);
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if (wkb)
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{
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return
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#if PY_VERSION_HEX >= 0x03000000
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::PyBytes_FromStringAndSize
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#else
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::PyString_FromStringAndSize
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#endif
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((const char*)wkb->buffer(),wkb->size());
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}
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else
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{
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Py_RETURN_NONE;
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}
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}
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#else
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PyObject* to_wkb2( path_type const& p)
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{
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throw std::runtime_error("mapnik::to_wkb() requires at least boost 1.47 while your build was compiled against boost "
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+ boost_version());
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}
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#endif
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std::string to_wkt( geometry_type const& geom)
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{
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#if BOOST_VERSION >= 104700
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std::string wkt; // Use Python String directly ?
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bool result = mapnik::util::to_wkt(wkt,geom);
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if (!result)
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{
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throw std::runtime_error("Generate WKT failed");
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}
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return wkt;
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#else
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throw std::runtime_error("mapnik::to_wkt() requires at least boost 1.47 while your build was compiled against boost "
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+ boost_version());
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#endif
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}
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std::string to_wkt2( path_type const& geom)
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{
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#if BOOST_VERSION >= 104700
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std::string wkt; // Use Python String directly ?
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bool result = mapnik::util::to_wkt(wkt,geom);
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if (!result)
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{
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throw std::runtime_error("Generate WKT failed");
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}
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return wkt;
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#else
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throw std::runtime_error("mapnik::to_wkt() requires at least boost 1.47 while your build was compiled against boost "
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+ boost_version());
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#endif
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}
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std::string to_geojson( path_type const& geom)
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{
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std::string json;
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mapnik::json::geometry_generator g;
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if (!g.generate(json,geom))
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{
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throw std::runtime_error("Failed to generate GeoJSON");
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}
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return json;
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}
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void export_geometry()
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{
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using namespace boost::python;
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enum_<mapnik::eGeomType>("GeometryType")
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.value("Point",mapnik::Point)
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.value("LineString",mapnik::LineString)
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.value("Polygon",mapnik::Polygon)
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;
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#if BOOST_VERSION >= 104700
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enum_<mapnik::util::wkbByteOrder>("wkbByteOrder")
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.value("XDR",mapnik::util::wkbXDR)
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.value("NDR",mapnik::util::wkbNDR)
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;
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#endif
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using mapnik::geometry_type;
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class_<geometry_type, std::auto_ptr<geometry_type>, boost::noncopyable>("Geometry2d",no_init)
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.def("envelope",&geometry_type::envelope)
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// .def("__str__",&geometry_type::to_string)
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.def("type",&geometry_type::type)
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.def("to_wkb",&to_wkb)
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.def("to_wkt",&to_wkt)
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// TODO add other geometry_type methods
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;
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class_<path_type, boost::shared_ptr<path_type>, boost::noncopyable>("Path")
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.def("__getitem__", getitem_impl,return_value_policy<reference_existing_object>())
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.def("__len__", &path_type::size)
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.def("add_wkt",add_wkt_impl)
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.def("add_wkb",add_wkb_impl)
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.def("add_geojson",add_geojson_impl)
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.def("to_wkt",&to_wkt2)
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.def("to_wkb",&to_wkb2)
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.def("from_wkt",from_wkt_impl)
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.def("from_wkb",from_wkb_impl)
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.def("from_geojson",from_geojson_impl)
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.def("to_geojson",to_geojson)
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.staticmethod("from_wkt")
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.staticmethod("from_wkb")
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.staticmethod("from_geojson")
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;
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}
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