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