slicing_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 SLICING_MORPHER_HH
# define SLICING_MORPHER_HH

# include <oln/morpher/generic_morpher.hh>

namespace oln {

  namespace morpher {

    template <class I, class Exact = mlc::final>
    struct slicing_morpher;
    template <class I, class Exact = mlc::final>
    struct super_slicing_morpher;

  } // end of namespace morpher

  template <class SrcType, class Exact>
  struct image_id< morpher::super_slicing_morpher<SrcType, Exact> >
  {
    typedef typename mlc::exact_vt<
      morpher::super_slicing_morpher<SrcType, Exact>,
      Exact>::ret
    exact_type;
    enum {dim = SrcType::dim - 1};
    typedef typename dim_traits<dim,
                                typename image_id<SrcType>::value_type,
                                exact_type
                                >::img_type img_type;
    typedef typename image_traits<img_type>::size_type size_type;
    typedef typename image_traits<img_type>::impl_type impl_type;
  };

  template <class SrcType, class Exact>
  struct image_id< morpher::super_slicing_morpher<const SrcType, Exact> >
  {
    typedef typename mlc::exact_vt<
      morpher::super_slicing_morpher<SrcType, Exact>,
      Exact>::ret
    exact_type;
    enum {dim = SrcType::dim - 1};
    typedef typename dim_traits<dim,
                                typename image_id<SrcType>::value_type,
                                exact_type
                                >::img_type img_type;
    typedef typename image_traits<img_type>::size_type size_type;
    typedef typename image_traits<img_type>::impl_type impl_type;
  };

  template <class SrcType, class Exact>
  struct image_id< morpher::slicing_morpher<SrcType, Exact> >
  {
    typedef typename mlc::exact_vt<morpher::slicing_morpher<SrcType, Exact>,
                                   Exact>::ret exact_type;
    enum {dim = SrcType::dim - 1};
    typedef typename dim_traits<dim,
                                typename image_id<SrcType>::value_type,
                                exact_type
                                >::img_type img_type;
    typedef typename image_id<img_type>::value_type value_type;
    typedef typename image_id<img_type>::point_type point_type;
    typedef typename image_id<img_type>::size_type size_type;
    typedef typename image_id<img_type>::impl_type impl_type;
  };

  template <class SrcType, class Exact>
  struct image_id< morpher::slicing_morpher<const SrcType, Exact> >
  {
    typedef typename mlc::exact_vt<morpher::slicing_morpher<SrcType, Exact>,
                                   Exact>::ret exact_type;
    enum {dim = SrcType::dim - 1};
    typedef typename dim_traits<dim,
                                typename image_id<SrcType>::value_type,
                                exact_type
                                >::img_type img_type;
    typedef typename image_id<img_type>::value_type value_type;
    typedef typename image_traits<img_type>::point_type point_type;
    typedef typename image_traits<img_type>::size_type size_type;
    typedef typename image_traits<img_type>::impl_type impl_type;
  };

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

  namespace morpher {

    oln::image1d_size
    image_size_dec(const oln::image2d_size& image_size)
    {
      return oln::image1d_size(image_size.ncols(), image_size.border());
    }

    oln::image2d_size
    image_size_dec(const oln::image3d_size& image_size)
    {
      return oln::image2d_size(image_size.nrows(),
                               image_size.ncols(),
                               image_size.border());
    }

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

    public:

      typedef super_slicing_morpher<SrcType, Exact> self_type;
      typedef typename image_id<self_type>::exact_type exact_type;
      typedef abstract::generic_morpher<SrcType, Exact> super_type;

      typedef typename image_id<exact_type>::size_type size_type;
      typedef typename image_id<exact_type>::impl_type impl_type;

      const size_type&
      size() const
      {
        return size_;
      }

      const impl_type*
      impl() const
      {
        return &impl_;
      }

      impl_type*
      impl()
      {
        return &impl_;
      }

      coord
      get_slice() const
      {
        return slice_;
      }

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

    protected:

      super_slicing_morpher(const SrcType &ima, const coord slice)
        : super_type(ima), slice_(slice), size_(image_size_dec(ima_.size())), impl_(size_)
      {}

      super_slicing_morpher()
      {}

      coord slice_; 
      const size_type size_; 
      impl_type impl_;

    };

    template <class SrcType, class Exact>
    struct slicing_morpher
      : public super_slicing_morpher<
          SrcType,
          typename image_id<slicing_morpher<SrcType, Exact> >::exact_type
        >
    {
      typedef slicing_morpher<SrcType, Exact> self_type;
      typedef typename image_id<self_type>::exact_type exact_type;
      typedef super_slicing_morpher<SrcType, exact_type> super_type;

      typedef typename image_id<exact_type>::point_type point_type;
      typedef typename image_id<exact_type>::img_type img_type;
      typedef typename image_id<exact_type>::value_type value_type;

      slicing_morpher(const SrcType &ima, coord slice)
        : super_type(ima, slice) {}

      slicing_morpher(const self_type& r)
        : super_type(r.get_ima(), r.get_slice()) {}

      slicing_morpher() {}

      value_type&
      at(const point_type &p)
      {
        typename SrcType::point_type tmp_p(p, slice_);
        return const_cast<value_type &>(this->ima_)[tmp_p];
      }

      const value_type at(const point_type& p) const
      {
        typename SrcType::point_type tmp_p(p, slice_);
        return this->ima_[tmp_p];
      }

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

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

      self_type&
      operator=(self_type& rhs)
      {
        return this->exact().assign(rhs);
      }

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

    };

    template <class SrcType, class Exact>
    struct slicing_morpher<const SrcType, Exact>
      : public super_slicing_morpher<
          const SrcType,
          typename image_id<slicing_morpher<const SrcType, Exact> >::exact_type
        >
    {

      typedef slicing_morpher<const SrcType, Exact> self_type;
      typedef typename image_id<self_type>::exact_type exact_type;
      typedef super_slicing_morpher<const SrcType, exact_type> super_type;

      typedef typename image_id<exact_type>::point_type point_type;
      typedef typename image_id<exact_type>::value_type value_type;


      slicing_morpher(const SrcType &ima, coord slice)
        : super_type(ima, slice)
      {}

      slicing_morpher(const self_type& r)
        : super_type(r.get_ima(), r.get_slice())
      {}

      slicing_morpher()
      {}

      const value_type
      at(const point_type &p) const
      {
        typename SrcType::point_type tmp_p(p, slice_);
        return this->ima_[tmp_p];
      }

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

    };

    template <class I>
    const slicing_morpher<I>
    slicing_morph(I &ima, coord slice)
    {
      return slicing_morpher<I>(ima, slice);
    }

  } // end of morpher namespace

} // end of oln namespace

#endif // !SLICING_MORPHER

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