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max_components.hh
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26 
27 #ifndef MLN_IO_FLD_MAX_COMPONENTS_HH
28 # define MLN_IO_FLD_MAX_COMPONENTS_HH
29 
34 
35 # include <mln/algebra/vec.hh>
36 # include <mln/value/rgb.hh>
37 # include <mln/io/fld/header.hh>
38 
39 namespace mln
40 {
41 
42  namespace io
43  {
44 
45  namespace fld
46  {
47 
48  template <typename V>
49  inline
50  unsigned max_component(const V&);
51 
52  template <unsigned n, typename V>
53  inline
54  unsigned max_component(const algebra::vec<n, V>& v);
55 
56  template <unsigned n>
57  inline
58  unsigned max_component(const value::rgb<n>&);
59 
60  inline
61  unsigned max_component(const fld::data_type::E& t);
62 
63 # ifndef MLN_INCLUDE_ONLY
64 
65  template <typename V>
66  inline
67  unsigned max_component(const V&)
68  {
69  return unsigned(mln_max(V));
70  }
71 
72 
73  template <unsigned n, typename V>
74  inline
75  unsigned max_component(const algebra::vec<n, V>& v)
76  {
77  (void) v;
78  return unsigned(mln_max(V));
79  }
80 
81  template <unsigned n>
82  inline
83  unsigned max_component(const value::rgb<n>&)
84  {
85  return mln_max(mln::value::int_u<n>);
86  }
87 
88  inline
89  unsigned max_component(const fld::data_type::E& t)
90  {
91  switch (t)
92  {
93  case data_type::BYTE: return mln_max(unsigned char);
94  case data_type::SHORT: return mln_max(unsigned short);
95  case data_type::INTEGER: return mln_max(unsigned);
96  case data_type::FLOAT: return unsigned(mln_max(float));
97  case data_type::DOUBLE: return unsigned(mln_max(double));
98  default: return 0;
99  }
100  }
101 
102 # endif // ! MLN_INCLUDE_ONLY
103  }
104 
105  }
106 
107 }
108 
109 #endif // !MLN_IO_FLD_MAX_COMPONENTS_HH