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rgb_to_int_u.hh
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26 
27 
28 #ifndef MLN_FUN_V2V_RGB_TO_INT_U_HH
29 # define MLN_FUN_V2V_RGB_TO_INT_U_HH
30 
31 # include <mln/core/concept/function.hh>
32 # include <mln/value/int_u8.hh>
33 # include <mln/value/rgb8.hh>
34 
35 namespace mln
36 {
37 
38  namespace fun
39  {
40 
41  namespace v2v
42  {
43 
44  template <unsigned n>
45  struct rgb_to_int_u : Function_v2v< rgb_to_int_u<n> >
46  {
48 
49  result operator()(const value::rgb<n>& c) const;
50  };
51 
52 # ifndef MLN_INCLUDE_ONLY
53 
54  template <unsigned n>
57  {
58  return (c.red() + c.green() + c.blue()) / 3;
59  }
60 
61 # endif // ! MLN_INCLUDE_ONLY
62 
63  } // end of namespace mln::fun::v2v
64 
65  } // end of namespace mln::fun
66 
67 } // end of namespace mln
68 
69 #endif // ! MLN_FUN_V2V_RGB_TO_INT_U_HH