image_base.hh

// Copyright (C) 2001, 2002, 2003, 2004  EPITA Research and Development Laboratory
//
// This file is part of the Olena Library.  This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License version 2 as published by the
// Free Software Foundation.
//
// 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this library; see the file COPYING.  If not, write to
// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, USA.
//
// As a special exception, you may use this file as part of a free
// software library 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 OLENA_IO_IMAGE_BASE_HH
# define OLENA_IO_IMAGE_BASE_HH

# include <oln/config/system.hh>

# include <iostream>
# include <string>

namespace oln {

  namespace io {

    namespace internal {

      enum reader_id { ReadNone     = 0,
                       ReadPnmPlain = 1,
                       ReadPnmRaw   = 2,
                       ReadAny      = 2 };


      template<reader_id F, class I>
      struct image_reader
      {
        static const std::string&
        name()
        {
          static const std::string name_("-");
          return name_;
        }

        static bool
        knows_ext(const std::string&)
        {
          return false;
        }

        static bool
        read(std::istream&, I&)
        {
          return false;
        }
      };


      enum writer_id { WriteNone     = 0,
                       WritePnmPlain = 1,
                       WritePnmRaw   = 2,
                       WriteAny      = 2 };



      template<writer_id F, class I>
      struct image_writer
      {
        static const std::string&
        name()
        {
          static const std::string name_("-");
          return name_;
        }

        static bool
        knows_ext(const std::string&)
        {
          return false;
        }

        static bool
        write(std::ostream&, const I&)
        {
          return false;
        }
      };

    } // end of namespace internal

  } // end of namespace io

} // end of namespace oln

#endif // ! OLENA_IO_IMAGE_BASE_HH

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