color_morpher.hh

// Copyright (C) 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_MORPHER_COLOR_MORPHER_HH
# define OLENA_MORPHER_COLOR_MORPHER_HH

# include <oln/morpher/generic_morpher.hh>

namespace oln {

  namespace morpher {

    template <class I, class Exact = mlc::final>
    class color_morpher;

  } // end of namespace morpher


  template <class I, class Exact>
  struct image_id<morpher::color_morpher<I, Exact> >
  {
    enum {dim = I::dim};
    typedef oln_impl_type(I) impl_type;
    typedef ntg_comp_type(oln_value_type(I)) value_type;
    typedef typename mlc::exact_vt<morpher::color_morpher<I, Exact>,
                                   Exact>::ret exact_type;
    typedef oln_point_type(I) point_type;
    typedef oln_iter_type(I) iter_type;
  };


  template <class SrcType, class Exact>
  struct image_traits <morpher::color_morpher<SrcType, Exact> > :
    public image_traits<morpher::abstract::generic_morpher<SrcType,
                                                           typename image_id<morpher::color_morpher<SrcType, Exact> >::exact_type> >
  {

  };

  namespace morpher {

    template <class SrcType, class Exact>
    class super_color_morpher :
      public abstract::generic_morpher<SrcType, Exact>
    {
    protected:

      unsigned n_;

      super_color_morpher(const SrcType &ima, unsigned n) : super_type(ima)
      {
        assert(n == ntg::rgb_R || n == ntg::rgb_G || n == ntg::rgb_B);
        n_ = n;
      }

      super_color_morpher()
      {}

    public:
      typedef abstract::generic_morpher<SrcType, Exact> super_type;
      typedef typename image_id<Exact>::impl_type impl_type;

      unsigned
      get_comp() const
      {
        return n_;
      }

      impl_type*
      impl()
      {
        return ima_.impl();
      }

      const impl_type*
      impl() const
      {
        return ima_.impl();
      }



      static std::string
      name()
      {
        return "super_color_morpher<" + super_type::name() + ">";
      }


    };

    template <class SrcType, class Exact>
    struct color_morpher :
      public super_color_morpher<SrcType,
                                 typename image_id<color_morpher<SrcType, Exact> >::exact_type>
    {
      typedef typename image_id<color_morpher<SrcType, Exact> >::exact_type exact_type;


      typedef color_morpher<SrcType, Exact> self_type;
      typedef typename image_id<exact_type>::iter_type iter_type;
      typedef typename image_id<exact_type>::point_type point_type;
      typedef typename image_id<exact_type>::value_type value_type;
      typedef super_color_morpher<SrcType, exact_type> super_type;

      color_morpher(const SrcType &ima, unsigned n) : super_type(ima, n)
      {}

      color_morpher(const color_morpher<SrcType, Exact>& r) : super_type(r.get_ima(), r.get_comp())
      {}

      color_morpher()
      {}

      value_type&
      at(const point_type& p)
      {
        return const_cast<SrcType &>(this->ima_)[p][this->n_];
      }

      const value_type
      at(const point_type& p) const
      {
        return this->ima_[p][this->n_];
      }

      self_type&
      assign(self_type& rhs)
      {
        oln_iter_type(SrcType)  it(rhs);

        for_all(it)
          this->at(it) = rhs[it];
        return this->exact();
      }

      static std::string
      name()
      {
        return "color_morpher<" + SrcType::name() + "," + Exact::name() + ">";
      }

    };

    template <class SrcType, class Exact>
    struct color_morpher<const SrcType, Exact> :
      public super_color_morpher<const SrcType,
                                 typename image_id<color_morpher<const SrcType,
                                                                 Exact> >::exact_type>
    {
      typedef typename image_id<color_morpher<const SrcType, Exact> >::exact_type exact_type;

      typedef typename image_id<exact_type>::point_type point_type;
      typedef typename image_id<exact_type>::iter_type iter_type;
      typedef typename image_id<exact_type>::value_type value_type;
      typedef super_color_morpher<const SrcType, exact_type> super_type;

      color_morpher(const SrcType &ima, unsigned n) : super_type(ima, n)
      {}

      color_morpher(const color_morpher<const SrcType, Exact>& r) :
      super_type(r.get_ima(), r.get_comp())
      {}

      color_morpher()
      {}

      const value_type
      at(const point_type& p) const
      {
        return this->ima_[p][this->n_];
      }

      static std::string
      name()
      {
        return "color_morpher<" + SrcType::name() + ">";
      }

    };


    template <class I>
    const color_morpher<I> rmorph(I &ima)
    {
      return color_morpher<I>(ima, ntg::rgb_R);
    }

    template <class I>
    const color_morpher<I> gmorph(I &ima)
    {
      return color_morpher<I>(ima, ntg::rgb_G);
    }

    template <class I>
    const color_morpher<I> bmorph(I &ima)
    {
      return color_morpher<I>(ima, ntg::rgb_B);
    }

  } // end of namespace morpher

} // end of namespace oln

#endif // !OLENA_MORPHER_COLOR_MORPHER_HH

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