line.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_DRAW_LINE_HH
# define MLN_DRAW_LINE_HH


# include <mln/core/concept/image.hh>
# include <mln/core/site_set/p_line2d.hh>
# include <mln/core/image/imorph/safe.hh>
# include <mln/data/paste.hh>
# include <mln/pw/image.hh>
# include <mln/pw/cst.hh>


namespace mln
{

  namespace draw
  {

    template <typename I>
    void line(Image<I>& ima,
              const mln_psite(I)& beg, const mln_psite(I)& end,
              const mln_value(I)& v);


# ifndef MLN_INCLUDE_ONLY

    template <typename I>
    inline
    void line(Image<I>& ima_,
              const mln_psite(I)& beg, const mln_psite(I)& end,
              const mln_value(I)& v)
    {
      I& ima = exact(ima_);
      mln_precondition(ima.is_valid());
      if (! ima.has(beg))
        trace::warning("Begin site is not part of the given image.");
      if (! ima.has(end))
        trace::warning("End site is not part of the given image.");
      data::paste(pw::cst(v) | p_line2d(beg, end),
                   safe(ima).rw());
    }

# endif // ! MLN_INCLUDE_ONLY

  } // end of namespace mln::draw

} // end of namespace mln


#endif // ! MLN_DRAW_LINE_HH