85 lines
2.6 KiB
C++
85 lines
2.6 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) 2009 Artem Pavlenko, Jean-Francois Doyon
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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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//$Id$
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// boost
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#include <boost/python.hpp>
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// mapnik
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#include <mapnik/ctrans.hpp>
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using mapnik::CoordTransform;
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struct view_transform_pickle_suite : boost::python::pickle_suite
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{
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static boost::python::tuple
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getinitargs(const CoordTransform& c)
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{
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using namespace boost::python;
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return boost::python::make_tuple(c.width(),c.height(),c.extent());
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}
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};
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namespace {
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mapnik::coord2d forward_point(mapnik::CoordTransform const& t, mapnik::coord2d const& in)
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{
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mapnik::coord2d out(in);
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t.forward(out);
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return out;
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}
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mapnik::coord2d backward_point(mapnik::CoordTransform const& t, mapnik::coord2d const& in)
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{
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mapnik::coord2d out(in);
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t.backward(out);
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return out;
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}
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mapnik::box2d<double> forward_envelope(mapnik::CoordTransform const& t, mapnik::box2d<double> const& in)
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{
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return t.forward(in);
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}
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mapnik::box2d<double> backward_envelope(mapnik::CoordTransform const& t, mapnik::box2d<double> const& in)
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{
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return t.backward(in);
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}
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}
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void export_view_transform()
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{
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using namespace boost::python;
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using mapnik::box2d;
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using mapnik::coord2d;
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class_<CoordTransform>("ViewTransform",init<int,int,box2d<double> const& > (
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"Create a ViewTransform with a width and height as integers and extent"))
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.def_pickle(view_transform_pickle_suite())
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.def("forward", forward_point)
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.def("backward",backward_point)
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.def("forward", forward_envelope)
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.def("backward",backward_envelope)
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.def("scale_x",&CoordTransform::scale_x)
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.def("scale_y",&CoordTransform::scale_y)
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;
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}
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