166 lines
6.8 KiB
C++
166 lines
6.8 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) 2006 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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#include <boost/python.hpp>
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#include <mapnik/raster_symbolizer.hpp>
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using mapnik::raster_symbolizer;
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struct raster_symbolizer_pickle_suite : boost::python::pickle_suite
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{
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/*
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static boost::python::tuple
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getinitargs(const raster_symbolizer& r)
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{
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return boost::python::make_tuple();
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}
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*/
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static boost::python::tuple
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getstate(const raster_symbolizer& r)
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{
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return boost::python::make_tuple(r.get_mode(),r.get_scaling(),r.get_opacity(),r.get_filter_factor(),r.get_mesh_size());
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}
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static void
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setstate (raster_symbolizer& r, boost::python::tuple state)
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{
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using namespace boost::python;
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if (len(state) != 5)
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{
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PyErr_SetObject(PyExc_ValueError,
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("expected 5-item tuple in call to __setstate__; got %s"
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% state).ptr()
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);
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throw_error_already_set();
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}
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r.set_mode(extract<std::string>(state[0]));
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r.set_scaling(extract<std::string>(state[1]));
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r.set_opacity(extract<float>(state[2]));
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r.set_filter_factor(extract<float>(state[3]));
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r.set_mesh_size(extract<unsigned>(state[4]));
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}
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};
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void export_raster_symbolizer()
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{
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using namespace boost::python;
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class_<raster_symbolizer>("RasterSymbolizer",
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init<>("Default ctor"))
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.def_pickle(raster_symbolizer_pickle_suite())
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.add_property("mode",
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make_function(&raster_symbolizer::get_mode,return_value_policy<copy_const_reference>()),
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&raster_symbolizer::set_mode,
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"Get/Set merging mode.\n"
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"Possible values are:\n"
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"normal, grain_merge, grain_merge2, multiply,\n"
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"multiply2, divide, divide2, screen, and hard_light\n"
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"\n"
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"Usage:\n"
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"\n"
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">>> from mapnik import RasterSymbolizer\n"
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">>> r = RasterSymbolizer()\n"
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">>> r.mode = 'grain_merge2'\n"
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)
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.add_property("scaling",
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make_function(&raster_symbolizer::get_scaling,return_value_policy<copy_const_reference>()),
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&raster_symbolizer::set_scaling,
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"Get/Set scaling algorithm.\n"
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"Possible values are:\n"
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"fast, bilinear, and bilinear8\n"
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"\n"
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"Usage:\n"
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"\n"
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">>> from mapnik import RasterSymbolizer\n"
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">>> r = RasterSymbolizer()\n"
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">>> r.scaling = 'bilinear8'\n"
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)
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.add_property("opacity",
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&raster_symbolizer::get_opacity,
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&raster_symbolizer::set_opacity,
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"Get/Set opacity.\n"
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"\n"
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"Usage:\n"
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"\n"
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">>> from mapnik import RasterSymbolizer\n"
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">>> r = RasterSymbolizer()\n"
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">>> r.opacity = .5\n"
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)
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.add_property("colorizer",
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&raster_symbolizer::get_colorizer,
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&raster_symbolizer::set_colorizer,
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"Get/Set the RasterColorizer used to color data rasters.\n"
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"\n"
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"Usage:\n"
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"\n"
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">>> from mapnik import RasterSymbolizer, RasterColorizer\n"
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">>> r = RasterSymbolizer()\n"
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">>> r.colorizer = RasterColorizer()\n"
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">>> for value, color in [\n"
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"... (0, \"#000000\"),\n"
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"... (10, \"#ff0000\"),\n"
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"... (40, \"#00ff00\"),\n"
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"... ]:\n"
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"... r.colorizer.append_band(value, color)\n"
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)
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.add_property("filter_factor",
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&raster_symbolizer::get_filter_factor,
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&raster_symbolizer::set_filter_factor,
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"Get/Set the filter factor used by the datasource.\n"
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"\n"
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"This is used by the Raster or Gdal datasources to pre-downscale\n"
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"images using overviews.\n"
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"Higher numbers can sometimes cause much better scaled image\n"
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"output, at the cost of speed.\n"
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"\n"
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"Examples:\n"
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" -1.0 : (Default) A suitable value will be determined from the\n"
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" chosen scaling method during rendering.\n"
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" 1.0 : The datasource will take care of all the scaling\n"
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" (using nearest neighbor interpolation)\n"
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" 2.0 : The datasource will scale the datasource to\n"
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" 2.0x the desired size, and mapnik will scale the rest\n"
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" of the way using the interpolation defined in self.scaling.\n"
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)
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.add_property("mesh_size",
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&raster_symbolizer::get_mesh_size,
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&raster_symbolizer::set_mesh_size,
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"Get/Set warping mesh size.\n"
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"Larger values result in faster warping times but might "
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"result in distorted maps.\n"
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"\n"
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"Usage:\n"
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"\n"
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">>> from mapnik import RasterSymbolizer\n"
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">>> r = RasterSymbolizer()\n"
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">>> r.mesh_size = 32\n"
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)
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;
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}
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