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histo/compute.hh
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26 
27 #ifndef MLN_HISTO_COMPUTE_HH
28 # define MLN_HISTO_COMPUTE_HH
29 
33 
34 # include <mln/core/concept/image.hh>
35 # include <mln/histo/array.hh>
36 
37 
38 // Specializations are in:
39 # include <mln/histo/compute.spe.hh>
40 
41 
42 namespace mln
43 {
44 
45  namespace histo
46  {
47 
49  template <typename I>
50  histo::array<mln_value(I)> compute(const Image<I>& input);
51 
52 
53 # ifndef MLN_INCLUDE_ONLY
54 
55  namespace impl
56  {
57 
58  namespace generic
59  {
60 
61  template <typename I>
62  inline
63  histo::array<mln_value(I)> compute_(const I& input)
64  {
65  histo::array<mln_value(I)> h;
66  mln_piter(I) p(input.domain());
67  for_all(p)
68  ++h(input(p));
69  return h;
70  }
71 
72  } // end of namespace mln::histo::impl::generic
73 
74  } // end of namespace mln::histo::impl
75 
76 
77  template <typename I>
78  inline
79  histo::array<mln_value(I)> compute(const Image<I>& input)
80  {
81  mln_trace("histo::compute");
82  mlc_equal(mln_trait_image_quant(I), mln::trait::image::quant::low)::check();
83  mln_precondition(exact(input).is_valid());
84 
85  histo::array<mln_value(I)> h = impl::compute_(mln_trait_image_speed(I)(),
86  exact(input));
87 
88  return h;
89  }
90 
91 # endif // ! MLN_INCLUDE_ONLY
92 
93  } // end of namespace mln::histo
94 
95 } // end of namespace mln
96 
97 
98 #endif // ! MLN_HISTO_COMPUTE_HH