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morpho/minus.hh
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25 
26 #ifndef MLN_MORPHO_MINUS_HH
27 # define MLN_MORPHO_MINUS_HH
28 
36 # include <mln/data/compare.hh>
37 # include <mln/logical/and_not.hh>
38 # include <mln/arith/minus.hh>
39 
40 
41 namespace mln
42 {
43 
44  namespace morpho
45  {
46 
50  template <typename I, typename J>
51  mln_concrete(I) minus(const Image<I>& lhs, const Image<J>& rhs);
52 
53 
54 # ifndef MLN_INCLUDE_ONLY
55 
56  namespace impl
57  {
58 
59  // Binary => morphology on sets.
60 
61  template <typename I, typename J>
62  inline
63  mln_concrete(I) minus_(trait::image::kind::logic,
64  const I& lhs, const J& rhs)
65  {
66  return logical::and_not(lhs, rhs);
67  }
68 
69  // Otherwise => morphology on functions.
70 
71  template <typename I, typename J>
72  inline
73  mln_concrete(I) minus_(trait::image::kind::any,
74  const I& lhs, const J& rhs)
75  {
76  return arith::minus<mln_value(I)>(lhs, rhs);
77  }
78 
79  } // end of namespace mln::morpho::impl
80 
81 
82  // Facades.
83 
84  template <typename I, typename J>
85  inline
86  mln_concrete(I)
87  minus(const Image<I>& lhs, const Image<J>& rhs)
88  {
89  trace::entering("morpho::minus");
90  mln_precondition(exact(rhs).domain() == exact(lhs).domain());
91 
92  mln_concrete(I) output = impl::minus_(mln_trait_image_kind(I)(),
93  exact(lhs), exact(rhs));
94 
95  trace::exiting("morpho::minus");
96  return output;
97  }
98 
99 # endif // ! MLN_INCLUDE_ONLY
100 
101  } // end of namespace mln::morpho
102 
103 } // end of namespace mln
104 
105 
106 #endif // ! MLN_MORPHO_MINUS_HH