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accu/compute.hh
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26 
27 #ifndef MLN_ACCU_COMPUTE_HH
28 # define MLN_ACCU_COMPUTE_HH
29 
36 
37 # include <mln/core/concept/meta_accumulator.hh>
38 # include <mln/core/concept/image.hh>
39 # include <mln/util/pix.hh>
40 
41 
42 namespace mln
43 {
44 
45  namespace accu
46  {
47 
62  template <typename A, typename I>
63  mln_result(A)
64  compute(const Accumulator<A>& a, const Image<I>& input);
65 
66 
81  template <typename A, typename I>
82  mln_meta_accu_result(A, util::pix<I>)
83  compute(const Meta_Accumulator<A>& a, const Image<I>& input);
84 
85 
86 
87 # ifndef MLN_INCLUDE_ONLY
88 
89 
90  namespace impl
91  {
92 
93  namespace generic
94  {
95 
96  template <typename A, typename I>
97  mln_result(A)
98  compute(const Accumulator<A>&, const Image<I>& input_)
99  {
100  mln_trace("accu::impl::generic::compute");
101 
102  const I& input = exact(input_);
103  mln_precondition(input.is_valid());
104 
105  A a;
106  mln_piter(I) p(input.domain());
107  for_all(p)
108  a.take(make::pix(input, p));
109 
110  return a.to_result();
111  }
112 
113  } // end of namespace mln::accu::impl::generic
114 
115  } // end of namespace mln::accu::impl
116 
117 
118  namespace internal
119  {
120 
121  template <typename A, typename I>
122  inline
123  mln_result(A)
124  compute_dispatch(const Accumulator<A>& a, const Image<I>& input)
125  {
126  return impl::generic::compute(a, input);
127  }
128 
129  } // end of namespace mln::accu::internal
130 
131 
132 
133  template <typename A, typename I>
134  inline
135  mln_result(A)
136  compute(const Accumulator<A>& a, const Image<I>& input)
137  {
138  mln_trace("accu::compute");
139 
140  mln_precondition(exact(input).is_valid());
141  mln_result(A) output = internal::compute_dispatch(a, input);
142 
143  return output;
144  }
145 
146  template <typename A, typename I>
147  inline
148  mln_meta_accu_result(A, util::pix<I>)
149  compute(const Meta_Accumulator<A>& a, const Image<I>& input)
150  {
151  mln_trace("accu::compute");
152 
153  mln_precondition(exact(input).is_valid());
154 
155  typedef mln_accu_with(A, util::pix<I>) A_;
156  util::pix<I> pix_(exact(input), mln_psite(I)());
157  A_ a_ = accu::unmeta(exact(a), pix_);
158 
159  mln_result(A_) output = internal::compute_dispatch(a_, input);
160 
161  return output;
162  }
163 
164 # endif // ! MLN_INCLUDE_ONLY
165 
166  } // end of namespace mln::accu
167 
168 } // end of namespace mln
169 
170 
171 #endif // ! MLN_ACCU_COMPUTE_HH