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rgb8_to_rgbn.hh
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26 
27 #ifndef MLN_FUN_V2V_RGB8_TO_RGBN_HH
28 # define MLN_FUN_V2V_RGB8_TO_RGBN_HH
29 
30 # include <mln/core/concept/function.hh>
31 # include <mln/value/rgb8.hh>
32 # include <mln/value/rgb.hh>
33 # include <mln/core/contract.hh>
34 
37 
38 
39 namespace mln
40 {
41 
42  namespace fun
43  {
44 
45  namespace v2v
46  {
47 
48 
54  template <unsigned n>
55  struct rgb8_to_rgbn : Function_v2v< rgb8_to_rgbn<n> >
56  {
59 
68  result operator()(const argument& c) const;
69  };
70 
71 
72 # ifndef MLN_INCLUDE_ONLY
73 
74  template <unsigned n>
76  rgb8_to_rgbn<n>::operator()(const argument& c) const
77  {
78  mlc_bool(n < 8)::check();
79 
80  unsigned size = pow(2, (8 - n));
81  result res(c.red() / size, c.green() / size, c.blue() / size);
82 
83  return res;
84  }
85 
86 # endif // ! MLN_INCLUDE_ONLY
87 
88 
89  } // end of namespace mln::fun::v2v
90 
91  } // end of namespace mln::fun
92 
93 } // end of namespace mln
94 
95 #endif // ! MLN_FUN_V2V_RGB8_TO_RGBN_HH