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