78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
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/*****************************************************************************
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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) 2014 Artem Pavlenko
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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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// mapnik
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#if defined(HAVE_JPEG)
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#include <mapnik/jpeg_io.hpp>
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#endif
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#include <mapnik/image_util_jpeg.hpp>
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#include <mapnik/image_data.hpp>
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// boost
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#include <boost/tokenizer.hpp>
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// stl
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#include <string>
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#include <iostream>
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namespace mapnik
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{
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jpeg_saver::jpeg_saver(std::ostream & stream, std::string const& t):
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stream_(stream), t_(t) {}
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void jpeg_saver::operator() (image_data_null const& image) const
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{
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throw ImageWriterException("null images not supported");
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}
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template <typename T>
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void jpeg_saver::operator() (T const& image) const
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{
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#if defined(HAVE_JPEG)
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int quality = 85;
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std::string val = t.substr(4);
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if (!val.empty())
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{
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if (!mapnik::util::string2int(val,quality) || quality < 0 || quality > 100)
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{
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throw ImageWriterException("invalid jpeg quality: '" + val + "'");
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}
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}
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save_as_jpeg(stream, quality, image);
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#else
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throw ImageWriterException("jpeg output is not enabled in your build of Mapnik");
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#endif
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}
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template void jpeg_saver::operator()<image_data_rgba8> (image_data_rgba8 const& image) const;
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template void jpeg_saver::operator()<image_data_gray8> (image_data_gray8 const& image) const;
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template void jpeg_saver::operator()<image_data_gray16> (image_data_gray16 const& image) const;
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template void jpeg_saver::operator()<image_data_gray32f> (image_data_gray32f const& image) const;
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template void jpeg_saver::operator()<image_view<image_data_rgba8>> (image_view<image_data_rgba8> const& image) const;
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template void jpeg_saver::operator()<image_view<image_data_gray8>> (image_view<image_data_gray8> const& image) const;
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template void jpeg_saver::operator()<image_view<image_data_gray16>> (image_view<image_data_gray16> const& image) const;
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template void jpeg_saver::operator()<image_view<image_data_gray32f>> (image_view<image_data_gray32f> const& image) const;
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} // end ns
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