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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2006 Artem Pavlenko, Jean-Francois Doyon
*
* 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
*
*****************************************************************************/
//$Id$
#include <boost/python.hpp>
#include <mapnik/raster_symbolizer.hpp>
using mapnik::raster_symbolizer;
struct raster_symbolizer_pickle_suite : boost::python::pickle_suite
{
/*
static boost::python::tuple
getinitargs(const raster_symbolizer& r)
{
return boost::python::make_tuple();
}
*/
static boost::python::tuple
getstate(const raster_symbolizer& r)
{
return boost::python::make_tuple(r.get_mode(),r.get_scaling(),r.get_opacity(),r.get_filter_factor(),r.get_mesh_size());
}
static void
setstate (raster_symbolizer& r, boost::python::tuple state)
{
using namespace boost::python;
if (len(state) != 5)
{
PyErr_SetObject(PyExc_ValueError,
("expected 5-item tuple in call to __setstate__; got %s"
% state).ptr()
);
throw_error_already_set();
}
r.set_mode(extract<std::string>(state[0]));
r.set_scaling(extract<std::string>(state[1]));
r.set_opacity(extract<float>(state[2]));
r.set_filter_factor(extract<float>(state[3]));
r.set_mesh_size(extract<unsigned>(state[4]));
}
};
void export_raster_symbolizer()
{
using namespace boost::python;
class_<raster_symbolizer>("RasterSymbolizer",
init<>("Default ctor"))
.def_pickle(raster_symbolizer_pickle_suite())
.add_property("mode",
make_function(&raster_symbolizer::get_mode,return_value_policy<copy_const_reference>()),
&raster_symbolizer::set_mode,
"Get/Set merging mode.\n"
"Possible values are:\n"
"normal, grain_merge, grain_merge2, multiply,\n"
"multiply2, divide, divide2, screen, and hard_light\n"
"\n"
"Usage:\n"
"\n"
">>> from mapnik import RasterSymbolizer\n"
">>> r = RasterSymbolizer()\n"
">>> r.mode = 'grain_merge2'\n"
)
.add_property("scaling",
make_function(&raster_symbolizer::get_scaling,return_value_policy<copy_const_reference>()),
&raster_symbolizer::set_scaling,
"Get/Set scaling algorithm.\n"
"Possible values are:\n"
"fast, bilinear, and bilinear8\n"
"\n"
"Usage:\n"
"\n"
">>> from mapnik import RasterSymbolizer\n"
">>> r = RasterSymbolizer()\n"
">>> r.scaling = 'bilinear8'\n"
)
.add_property("opacity",
&raster_symbolizer::get_opacity,
&raster_symbolizer::set_opacity,
"Get/Set opacity.\n"
"\n"
"Usage:\n"
"\n"
">>> from mapnik import RasterSymbolizer\n"
">>> r = RasterSymbolizer()\n"
">>> r.opacity = .5\n"
)
.add_property("colorizer",
&raster_symbolizer::get_colorizer,
&raster_symbolizer::set_colorizer,
"Get/Set the RasterColorizer used to color data rasters.\n"
"\n"
"Usage:\n"
"\n"
">>> from mapnik import RasterSymbolizer, RasterColorizer\n"
">>> r = RasterSymbolizer()\n"
">>> r.colorizer = RasterColorizer()\n"
">>> for value, color in [\n"
"... (0, \"#000000\"),\n"
"... (10, \"#ff0000\"),\n"
"... (40, \"#00ff00\"),\n"
"... ]:\n"
"... r.colorizer.append_band(value, color)\n"
)
.add_property("filter_factor",
&raster_symbolizer::get_filter_factor,
&raster_symbolizer::set_filter_factor,
"Get/Set the filter factor used by the datasource.\n"
"\n"
"This is used by the Raster or Gdal datasources to pre-downscale\n"
"images using overviews.\n"
"Higher numbers can sometimes cause much better scaled image\n"
"output, at the cost of speed.\n"
"\n"
"Examples:\n"
" -1.0 : (Default) A suitable value will be determined from the\n"
" chosen scaling method during rendering.\n"
" 1.0 : The datasource will take care of all the scaling\n"
" (using nearest neighbor interpolation)\n"
" 2.0 : The datasource will scale the datasource to\n"
" 2.0x the desired size, and mapnik will scale the rest\n"
" of the way using the interpolation defined in self.scaling.\n"
)
.add_property("mesh_size",
&raster_symbolizer::get_mesh_size,
&raster_symbolizer::set_mesh_size,
"Get/Set warping mesh size.\n"
"Larger values result in faster warping times but might "
"result in distorted maps.\n"
"\n"
"Usage:\n"
"\n"
">>> from mapnik import RasterSymbolizer\n"
">>> r = RasterSymbolizer()\n"
">>> r.mesh_size = 32\n"
)
;
}
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