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split.hh
1 // Copyright (C) 2010 EPITA Research and Development Laboratory (LRDE)
2 //
3 // This file is part of Olena.
4 //
5 // Olena is free software: you can redistribute it and/or modify it under
6 // the terms of the GNU General Public License as published by the Free
7 // Software Foundation, version 2 of the License.
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15 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
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17 // As a special exception, you may use this file as part of a free
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19 // instantiate templates or use macros or inline functions from this
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25 
26 #ifndef MLN_DATA_SPLIT_HH
27 # define MLN_DATA_SPLIT_HH
28 
29 # include <mln/core/concept/image.hh>
30 # include <mln/value/rgb8.hh>
31 
37 
38 namespace mln
39 {
40 
41  namespace data
42  {
43 
44  template <typename I, typename J>
45  void
46  split(const Image<I>& input_, Image<J>& r_, Image<J>& g_, Image<J>& b_);
47 
48 
49 # ifndef MLN_INCLUDE_ONLY
50 
51 
52  template <typename I, typename J>
53  void
54  split(const Image<I>& input_, Image<J>& r_, Image<J>& g_, Image<J>& b_)
55  {
56  trace::entering("mln::data::split");
57 
58  const I& input = exact(input_);
59  J& r = exact(r_);
60  J& g = exact(g_);
61  J& b = exact(b_);
62 
63  mln_assertion(input.is_valid());
64  mlc_is(mln_value(I), value::rgb8)::check();
65  // FIXME: add more checks.
66  mlc_is(mln_trait_image_value_storage(I),
67  trait::image::value_storage::one_block)::check();
68 
69  initialize(r, input);
70  initialize(g, input);
71  initialize(b, input);
72 
73  typedef const mln_value(I)* in_ptr_t;
74  typedef mln_value(J)* out_ptr_t;
75 
76  in_ptr_t in_ptr = input.buffer();
77  out_ptr_t
78  r_ptr = r.buffer(),
79  g_ptr = g.buffer(),
80  b_ptr = b.buffer();
81 
82  for (unsigned n = 0; n < input.nelements(); ++n, ++in_ptr)
83  {
84  *r_ptr++ = in_ptr->red();
85  *g_ptr++ = in_ptr->green();
86  *b_ptr++ = in_ptr->blue();
87  }
88 
89  trace::exiting("mln::data::split");
90  }
91 
92 
93 # endif // ! MLN_INCLUDE_ONLY
94 
95  } // end of namespace mln::data
96 
97 } // end of namespace mln
98 
99 #endif // ! MLN_DATA_SPLIT_HH