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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2009 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
*
*****************************************************************************/
// mapnik
#include <mapnik/proj_transform.hpp>
#include <boost/noncopyable.hpp>
// boost
#include <boost/python.hpp>
// stl
#include <stdexcept>
using mapnik::proj_transform;
using mapnik::projection;
struct proj_transform_pickle_suite : boost::python::pickle_suite
{
static boost::python::tuple
getinitargs(const proj_transform& p)
{
using namespace boost::python;
return boost::python::make_tuple(p.source(),p.dest());
}
};
namespace {
mapnik::coord2d forward_transform_c(mapnik::proj_transform& t, mapnik::coord2d const& c)
{
double x = c.x;
double y = c.y;
double z = 0.0;
if (!t.forward(x,y,z)) {
std::ostringstream s;
s << "Failed to forward project "
<< c << " from " << t.source().params() << " to: " << t.dest().params();
throw std::runtime_error(s.str());
}
return mapnik::coord2d(x,y);
}
mapnik::coord2d backward_transform_c(mapnik::proj_transform& t, mapnik::coord2d const& c)
{
double x = c.x;
double y = c.y;
double z = 0.0;
if (!t.backward(x,y,z)) {
std::ostringstream s;
s << "Failed to back project "
<< c << " from " << t.dest().params() << " to: " << t.source().params();
throw std::runtime_error(s.str());
}
return mapnik::coord2d(x,y);
}
mapnik::box2d<double> forward_transform_env(mapnik::proj_transform& t, mapnik::box2d<double> const & box)
{
mapnik::box2d<double> new_box = box;
if (!t.forward(new_box)) {
std::ostringstream s;
s << "Failed to forward project "
<< box << " from " << t.source().params() << " to: " << t.dest().params();
throw std::runtime_error(s.str());
}
return new_box;
}
mapnik::box2d<double> backward_transform_env(mapnik::proj_transform& t, mapnik::box2d<double> const & box)
{
mapnik::box2d<double> new_box = box;
if (!t.backward(new_box)){
std::ostringstream s;
s << "Failed to back project "
<< box << " from " << t.dest().params() << " to: " << t.source().params();
throw std::runtime_error(s.str());
}
return new_box;
}
mapnik::box2d<double> forward_transform_env_p(mapnik::proj_transform& t, mapnik::box2d<double> const & box, unsigned int points)
{
mapnik::box2d<double> new_box = box;
if (!t.forward(new_box,points)) {
std::ostringstream s;
s << "Failed to forward project "
<< box << " from " << t.source().params() << " to: " << t.dest().params();
throw std::runtime_error(s.str());
}
return new_box;
}
mapnik::box2d<double> backward_transform_env_p(mapnik::proj_transform& t, mapnik::box2d<double> const & box, unsigned int points)
{
mapnik::box2d<double> new_box = box;
if (!t.backward(new_box,points)){
std::ostringstream s;
s << "Failed to back project "
<< box << " from " << t.dest().params() << " to: " << t.source().params();
throw std::runtime_error(s.str());
}
return new_box;
}
}
void export_proj_transform ()
{
using namespace boost::python;
class_<proj_transform, boost::noncopyable>("ProjTransform", init< projection const&, projection const& >())
.def_pickle(proj_transform_pickle_suite())
.def("forward", forward_transform_c)
.def("backward",backward_transform_c)
.def("forward", forward_transform_env)
.def("backward",backward_transform_env)
.def("forward", forward_transform_env_p)
.def("backward",backward_transform_env_p)
;
}
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