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rgb8_to_rgbn.hh
1 // Copyright (C) 2010 EPITA Research and Development Laboratory (LRDE)
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25 
26 #ifndef MLN_FUN_V2V_RGB8_TO_RGBN_HH
27 # define MLN_FUN_V2V_RGB8_TO_RGBN_HH
28 
29 # include <mln/core/concept/function.hh>
30 # include <mln/value/rgb8.hh>
31 # include <mln/value/rgb.hh>
32 # include <mln/core/contract.hh>
33 
37 
38 
39 namespace mln
40 {
41 
42  namespace fun
43  {
44 
45  namespace v2v
46  {
47 
48 
54  //
55  template <unsigned n>
56  struct rgb8_to_rgbn : Function_v2v< rgb8_to_rgbn<n> >
57  {
58  typedef value::rgb8 argument;
59  typedef value::rgb<n> result;
60 
67  //
68  result operator()(const argument& c) const;
69 
70  };
71 
72 
73 # ifndef MLN_INCLUDE_ONLY
74 
80  //
81  template <unsigned n>
84  {
85  mln_precondition(8 > n);
86 
87  unsigned size = pow(2,(8-n));
88  /*
89  std::cout << "c : " << c << std::endl;
90  std::cout << "red : " << c.red() << std::endl;
91  std::cout << "size : " << size << std::endl;
92  std::cout << "res : " << (c.red() / size) << std::endl;
93  std::cout << "max : " << (mln_max(mln::value::int_u<n>))<< std::endl;
94  */
95  result res(c.red() / size, c.green() / size, c.blue() / size);
96 
97  return res;
98  }
99 
100 # endif // ! MLN_INCLUDE_ONLY
101 
102 
103  } // end of namespace mln::fun::v2v
104 
105  } // end of namespace mln::fun
106 
107 } // end of namespace mln
108 
109 #endif // ! MLN_FUN_V2V_RGB8_TO_RGBN_HH