4184f75011
Added visitor pattern to several different methods as well to prepare for image_data_any including compositing. Ref #2633
98 lines
3.1 KiB
C++
98 lines
3.1 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2014 Artem Pavlenko
|
|
*
|
|
* 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
|
|
*
|
|
*****************************************************************************/
|
|
|
|
// mapnik
|
|
#if defined(HAVE_JPEG)
|
|
#include <mapnik/jpeg_io.hpp>
|
|
#endif
|
|
|
|
#include <mapnik/image_util.hpp>
|
|
#include <mapnik/image_util_jpeg.hpp>
|
|
#include <mapnik/image_data.hpp>
|
|
#include <mapnik/image_data_any.hpp>
|
|
#include <mapnik/image_view.hpp>
|
|
#include <mapnik/util/conversions.hpp>
|
|
|
|
// boost
|
|
#include <boost/tokenizer.hpp>
|
|
|
|
// stl
|
|
#include <string>
|
|
#include <iostream>
|
|
|
|
namespace mapnik
|
|
{
|
|
|
|
jpeg_saver::jpeg_saver(std::ostream & stream, std::string const& t):
|
|
stream_(stream), t_(t) {}
|
|
|
|
template <typename T>
|
|
void process_rgba8_jpeg(T const& image, std::string const& t, std::ostream & stream)
|
|
{
|
|
#if defined(HAVE_JPEG)
|
|
int quality = 85;
|
|
std::string val = t.substr(4);
|
|
if (!val.empty())
|
|
{
|
|
if (!mapnik::util::string2int(val,quality) || quality < 0 || quality > 100)
|
|
{
|
|
throw ImageWriterException("invalid jpeg quality: '" + val + "'");
|
|
}
|
|
}
|
|
save_as_jpeg(stream, quality, image);
|
|
#else
|
|
throw ImageWriterException("jpeg output is not enabled in your build of Mapnik");
|
|
#endif
|
|
}
|
|
|
|
template<>
|
|
void jpeg_saver::operator()<image_data_rgba8> (image_data_rgba8 const& image) const
|
|
{
|
|
process_rgba8_jpeg(image, t_, stream_);
|
|
}
|
|
|
|
template<>
|
|
void jpeg_saver::operator()<image_view_rgba8> (image_view_rgba8 const& image) const
|
|
{
|
|
process_rgba8_jpeg(image, t_, stream_);
|
|
}
|
|
|
|
template<>
|
|
void jpeg_saver::operator()<image_data_null> (image_data_null const& image) const
|
|
{
|
|
throw ImageWriterException("Can not save a null image to jpeg");
|
|
}
|
|
|
|
template <typename T>
|
|
void jpeg_saver::operator() (T const& image) const
|
|
{
|
|
throw ImageWriterException("Mapnik does not support jpeg grayscale images");
|
|
}
|
|
|
|
template void jpeg_saver::operator() (image_data_gray8 const& image) const;
|
|
template void jpeg_saver::operator() (image_data_gray16 const& image) const;
|
|
template void jpeg_saver::operator() (image_data_gray32f const& image) const;
|
|
template void jpeg_saver::operator() (image_view_gray8 const& image) const;
|
|
template void jpeg_saver::operator() (image_view_gray16 const& image) const;
|
|
template void jpeg_saver::operator() (image_view_gray32f const& image) const;
|
|
|
|
} // end ns
|