105 lines
3.6 KiB
C++
105 lines
3.6 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) 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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extern "C"
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{
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#include <png.h>
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}
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// boost
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#include <boost/python.hpp>
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#include <boost/python/module.hpp>
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#include <boost/python/def.hpp>
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// mapnik
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#include <mapnik/graphics.hpp>
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#include <mapnik/image_util.hpp>
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#include <mapnik/jpeg_io.hpp>
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#include <mapnik/png_io.hpp>
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#include <mapnik/image_reader.hpp>
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#include <sstream>
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using mapnik::Image32;
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using mapnik::ImageReader;
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using mapnik::get_image_reader;
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using mapnik::type_from_filename;
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using namespace boost::python;
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using mapnik::save_to_file;
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// output 'raw' pixels
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PyObject* tostring1( Image32 const& im)
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{
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int size = im.width() * im.height() * 4;
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return ::PyString_FromStringAndSize((const char*)im.raw_data(),size);
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}
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// encode (png,jpeg)
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PyObject* tostring2(Image32 const & im, std::string const& format)
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{
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std::ostringstream ss(std::ios::out|std::ios::binary);
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if (format == "png") save_as_png(ss,im.data());
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else if (format == "png256") save_as_png256(ss,im.data());
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else if (format == "jpeg") save_as_jpeg(ss,85,im.data());
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else throw mapnik::ImageWriterException("unknown format: " + format);
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return ::PyString_FromStringAndSize((const char*)ss.str().c_str(),ss.str().size());
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}
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void (*save_to_file1)( mapnik::Image32 const&, std::string const&,std::string const&) = mapnik::save_to_file;
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void (*save_to_file2)( mapnik::Image32 const&, std::string const&) = mapnik::save_to_file;
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boost::shared_ptr<Image32> open_from_file(std::string const& filename)
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{
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std::auto_ptr<ImageReader> reader(get_image_reader(filename,type_from_filename(filename)));
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if (reader.get())
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{
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boost::shared_ptr<Image32> image_ptr(new Image32(reader->width(),reader->height()));
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reader->read(0,0,image_ptr->data());
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return image_ptr;
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}
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throw mapnik::ImageReaderException("FIXME: " + filename);
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}
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void blend (Image32 & im, unsigned x, unsigned y, Image32 const& im2, float opacity)
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{
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im.set_rectangle_alpha2(im2.data(),x,y,opacity);
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}
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void export_image()
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{
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using namespace boost::python;
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class_<Image32,boost::shared_ptr<Image32> >("Image","This class represents a 32 bit RGBA image.",init<int,int>())
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.def("width",&Image32::width)
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.def("height",&Image32::height)
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.def("view",&Image32::get_view)
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.add_property("background",make_function
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(&Image32::getBackground,return_value_policy<copy_const_reference>()),
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&Image32::setBackground, "The background color of the image.")
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.def("blend",&blend)
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.def("tostring",&tostring1)
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.def("tostring",&tostring2)
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.def("save", save_to_file1)
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.def("save", save_to_file2)
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.def("open",open_from_file)
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.staticmethod("open")
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;
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}
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