save_header.hh

// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE)
//
// This file is part of Olena.
//
// Olena is free software: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation, version 2 of the License.
//
// Olena 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Olena.  If not, see <http://www.gnu.org/licenses/>.
//
// As a special exception, you may use this file as part of a free
// software project without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to produce
// an executable, this file does not by itself cause the resulting
// executable to be covered by the GNU General Public License.  This
// exception does not however invalidate any other reasons why the
// executable file might be covered by the GNU General Public License.

#ifndef MLN_IO_PNM_SAVE_HEADER_HH
# define MLN_IO_PNM_SAVE_HEADER_HH


# include <iostream>
# include <fstream>

# include <mln/io/pnm/max_component.hh>

# include <mln/value/rgb.hh>
# include <mln/geom/nrows.hh>
# include <mln/geom/ncols.hh>


namespace mln
{

  namespace io
  {

# ifndef MLN_INCLUDE_ONLY

    namespace pnm
    {

      template <typename V>
      inline
      void save_max_val(V&, std::ofstream& file)
      {
        file << max_component(V()) << std::endl;
      }

      inline
      void save_max_val(bool&, std::ofstream&)
      {
      }

      template <typename I>
      inline
      void save_header(char type,
                       const I& ima, const std::string& filename,
                       std::ofstream& file)
      {
        if (! file)
        {
          std::cerr << "error: cannot open file '" << filename
                    << "'!";
          abort();
        }
        file << "P" << type << std::endl;
        file << "# Generated by Milena 1.0  http://olena.lrde.epita.fr" << std::endl;
        file << "# EPITA Research and Development Laboratory (LRDE)" << std::endl;
        // We have a two-line comment because xv is buggy for some
        // tiny binary images and their workaround is to have such a
        // two-line comment...
        file << geom::ncols(ima) << ' ' << geom::nrows(ima) << std::endl;

        mln_value(I) i;
        save_max_val(i, file);
      }

    } // end of namespace mln::io::pnm


# endif // ! MLN_INCLUDE_ONLY

  } // end of namespace mln::io

} // end of namespace mln


#endif // ! MLN_IO_PNM_SAVE_HEADER_HH