77 lines
2.8 KiB
C++
77 lines
2.8 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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extern "C"
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{
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#include <png.h>
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}
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#include <boost/python.hpp>
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#include <mapnik/image_util.hpp>
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#include <mapnik/image_view.hpp>
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#include <mapnik/jpeg_io.hpp>
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#include <mapnik/png_io.hpp>
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#include <sstream>
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using mapnik::ImageData32;
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using mapnik::image_view;
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using mapnik::save_to_file;
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// output 'raw' pixels
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PyObject* view_tostring1(image_view<ImageData32> const& view)
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{
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std::ostringstream ss(std::ios::out|std::ios::binary);
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for (unsigned i=0;i<view.height();i++)
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{
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ss.write(reinterpret_cast<const char*>(view.getRow(i)),
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view.width() * sizeof(image_view<ImageData32>::pixel_type));
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}
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return ::PyString_FromStringAndSize((const char*)ss.str().c_str(),ss.str().size());
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}
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// encode (png,jpeg)
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PyObject* view_tostring2(image_view<ImageData32> const & view, 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,view);
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else if (format == "png256") save_as_png256(ss,view);
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else if (format == "jpeg") save_as_jpeg(ss,85,view);
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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_view1)(image_view<ImageData32> const&, std::string const&,std::string const&) = mapnik::save_to_file;
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void (*save_view2)(image_view<ImageData32> const&, std::string const&) = mapnik::save_to_file;
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void export_image_view()
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{
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using namespace boost::python;
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class_<image_view<ImageData32> >("ImageView","A view into an image.",no_init)
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.def("width",&image_view<ImageData32>::width)
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.def("height",&image_view<ImageData32>::height)
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.def("tostring",&view_tostring1)
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.def("tostring",&view_tostring2)
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.def("save",save_view1)
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.def("save",save_view2)
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;
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}
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