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split.hh
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26 
27 #ifndef MLN_DATA_SPLIT_HH
28 # define MLN_DATA_SPLIT_HH
29 
30 # include <mln/core/concept/image.hh>
31 # include <mln/value/rgb8.hh>
32 
38 
39 namespace mln
40 {
41 
42  namespace data
43  {
44 
49  template <typename I, typename J>
50  void
51  split(const Image<I>& input, Image<J>& r, Image<J>& g, Image<J>& b);
52 
53 
54 # ifndef MLN_INCLUDE_ONLY
55 
56 
57  template <typename I, typename J>
58  void
59  split(const Image<I>& input_, Image<J>& r_, Image<J>& g_, Image<J>& b_)
60  {
61  mln_trace("mln::data::split");
62 
63  const I& input = exact(input_);
64  J& r = exact(r_);
65  J& g = exact(g_);
66  J& b = exact(b_);
67 
68  mln_assertion(input.is_valid());
69  mlc_is(mln_value(I), value::rgb8)::check();
70  // FIXME: add more checks.
71  mlc_is(mln_trait_image_value_storage(I),
72  trait::image::value_storage::one_block)::check();
73 
74  initialize(r, input);
75  initialize(g, input);
76  initialize(b, input);
77 
78  typedef const mln_value(I)* in_ptr_t;
79  typedef mln_value(J)* out_ptr_t;
80 
81  in_ptr_t in_ptr = input.buffer();
82  out_ptr_t
83  r_ptr = r.buffer(),
84  g_ptr = g.buffer(),
85  b_ptr = b.buffer();
86 
87  for (unsigned n = 0; n < input.nelements(); ++n, ++in_ptr)
88  {
89  *r_ptr++ = in_ptr->red();
90  *g_ptr++ = in_ptr->green();
91  *b_ptr++ = in_ptr->blue();
92  }
93 
94  }
95 
96 
97 # endif // ! MLN_INCLUDE_ONLY
98 
99  } // end of namespace mln::data
100 
101 } // end of namespace mln
102 
103 #endif // ! MLN_DATA_SPLIT_HH