86 lines
3.1 KiB
C++
86 lines
3.1 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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* Copyright (C) 2011 Artem Pavlenko
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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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#if defined(GRID_RENDERER)
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// boost
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#include <boost/python.hpp>
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#include <boost/python/module.hpp>
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#include <boost/python/def.hpp>
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// mapnik
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#include <mapnik/grid/grid.hpp>
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#include "python_grid_utils.hpp"
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using namespace boost::python;
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// help compiler see template definitions
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static dict (*encode)( mapnik::grid const&, std::string const& , bool, unsigned int) = mapnik::grid_encode;
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bool painted(mapnik::grid const& grid)
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{
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return grid.painted();
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}
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mapnik::grid::value_type get_pixel(mapnik::grid const& grid, int x, int y)
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{
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if (x < static_cast<int>(grid.width()) && y < static_cast<int>(grid.height()))
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{
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mapnik::grid::data_type const & data = grid.data();
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return data(x,y);
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}
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PyErr_SetString(PyExc_IndexError, "invalid x,y for grid dimensions");
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boost::python::throw_error_already_set();
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return 0;
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}
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void export_grid()
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{
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class_<mapnik::grid,std::shared_ptr<mapnik::grid> >(
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"Grid",
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"This class represents a feature hitgrid.",
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init<int,int,std::string,unsigned>(
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( boost::python::arg("width"), boost::python::arg("height"),boost::python::arg("key")="__id__", boost::python::arg("resolution")=1 ),
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"Create a mapnik.Grid object\n"
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))
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.def("painted",&painted)
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.def("width",&mapnik::grid::width)
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.def("height",&mapnik::grid::height)
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.def("view",&mapnik::grid::get_view)
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.def("get_pixel",&get_pixel)
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.def("clear",&mapnik::grid::clear)
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.def("encode",encode,
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( boost::python::arg("encoding")="utf", boost::python::arg("features")=true,boost::python::arg("resolution")=4 ),
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"Encode the grid as as optimized json\n"
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)
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.add_property("key",
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make_function(&mapnik::grid::get_key,return_value_policy<copy_const_reference>()),
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&mapnik::grid::set_key,
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"Get/Set key to be used as unique indentifier for features\n"
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"The value should either be __id__ to refer to the feature.id()\n"
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"or some globally unique integer or string attribute field\n"
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)
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;
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}
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#endif
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