paste.hh

// Copyright (C) 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_DATA_PASTE_HH
# define MLN_DATA_PASTE_HH


# include <mln/core/concept/image.hh>

// Specializations are in:
# include <mln/data/paste.spe.hh>



namespace mln
{

  namespace data
  {

    template <typename I, typename J>
    void paste(const Image<I>& input, Image<J>& output);



# ifndef MLN_INCLUDE_ONLY

    namespace internal
    {

      //
      template <typename I, typename J>
      inline
      void paste_tests(const Image<I>& input, Image<J>& output)
      {
        mlc_is(mln_trait_image_pw_io(J), trait::image::pw_io::read_write)::
          check();
        mlc_converts_to(mln_value(I), mln_value(J))::check();

        mln_precondition(exact(input).is_valid());
        mln_precondition(exact(input).domain() <= exact(output).domain());

        // Avoid warning when compiling with NDEBUG
        (void)input;
        (void)output;
      }

    } // end of namespace mln::data::internal


    namespace impl
    {

      namespace generic
      {

        //
        template <typename I, typename J>
        inline
        void paste(const Image<I>& input_, Image<J>& output_)
        {
          trace::entering("data::impl::generic::paste");

          data::internal::paste_tests(input_, output_);

          const I& input  = exact(input_);
          J& output = exact(output_);


          mln_piter(I) p(input.domain());
          for_all(p)
            output(p) = static_cast<mln_value(J)>(input(p));

          trace::exiting("data::impl::generic::paste");
        }

      } // end of namespace mln::data::impl::generic

    } // end of namespace mln::data::impl


    // Facade.

    template <typename I, typename J>
    inline
    void paste(const Image<I>& input, Image<J>& output)
    {
      trace::entering("data::paste");

      mlc_converts_to(mln_value(I), mln_value(J))::check();

      internal::paste_tests(input, output);
      internal::paste_dispatch(input, output);

      trace::exiting("data::paste");
    }

# endif // ! MLN_INCLUDE_ONLY

  } // end of namespace mln::data

} // end of namespace mln



#endif // ! MLN_DATA_PASTE_HH