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win/diff.hh
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25 
26 #ifndef MLN_WIN_DIFF_HH
27 # define MLN_WIN_DIFF_HH
28 
32 
33 # include <mln/trait/op/minus.hh>
34 # include <mln/core/window.hh>
35 # include <mln/core/neighb.hh>
36 
37 
38 
39 namespace mln
40 {
41 
42  namespace win
43  {
44 
47  //
48  template <typename W1, typename W2>
49  mln_regular(W1)
50  diff(const Window<W1>& win1, const Window<W2>& win2);
51 
52 
55  //
56  template <typename N1, typename N2>
57  neighb<mln_deduce(N1, window, regular)>
58  diff(const Neighborhood<N1>& nbh1, const Neighborhood<N2>& nbh2);
59 
60  } // end of namespace mln::win
61 
62 
66  //
67  template <typename W1, typename W2>
68  mln_regular(W1)
69  operator-(const Window<W1>& win1, const Window<W2>& win2);
70 
73  //
74  template <typename N1, typename N2>
75  neighb<mln_deduce(N1, window, regular)>
76  operator-(const Neighborhood<N1>& nbh1, const Neighborhood<N2>& nbh2);
77 
78 
79  namespace trait
80  {
81 
82  template <typename W1, typename W2>
83  struct set_binary_< op::minus, mln::Window, W1, mln::Window, W2 >
84  {
85  typedef mln_regular(W1) ret;
86  };
87 
88 
89  template <typename N1, typename N2>
90  struct set_binary_< op::minus, mln::Neighborhood, N1, mln::Neighborhood, N2 >
91  {
93  };
94 
95  } // end of namespace mln::trait
96 
97 
98 
99 # ifndef MLN_INCLUDE_ONLY
100 
101  namespace win
102  {
103 
104  template <typename W1, typename W2>
105  inline
106  mln_regular(W1)
107  diff(const Window<W1>& win1_, const Window<W2>& win2_)
108  {
109  trace::entering("win::diff");
110 
111  mln_is_simple_window(W1)::check();
112  mln_is_simple_window(W2)::check();
113 
114  const W1& win1 = exact(win1_);
115  const W2& win2 = exact(win2_);
116  mln_regular(W1) tmp;
117 
118  const unsigned n = win1.size();
119  for (unsigned i = 0; i < n; ++i)
120  {
121  if (win2.has(win1.dp(i)))
122  continue;
123  tmp.insert(win1.dp(i));
124  }
125 
126  trace::exiting("win::diff");
127  return tmp;
128  }
129 
130  template <typename N1, typename N2>
131  neighb<mln_deduce(N1, window, regular)>
132  diff(const Neighborhood<N1>& nbh1, const Neighborhood<N2>& nbh2)
133  {
134  typedef mln_deduce(N1, window, regular) W1;
135  W1 win = diff(exact(nbh1).win(), exact(nbh2).win());
136  neighb<W1> tmp(win);
137  return tmp;
138  }
139 
140  } // end of namespace mln::win
141 
142 
143  // Operators.
144 
145  template <typename W1, typename W2>
146  inline
147  mln_regular(W1)
148  operator-(const Window<W1>& win1, const Window<W2>& win2)
149  {
150  return win::diff(win1, win2);
151  }
152 
153  template <typename N1, typename N2>
154  neighb<mln_deduce(N1, window, regular)>
155  operator-(const Neighborhood<N1>& nbh1, const Neighborhood<N2>& nbh2)
156  {
157  return win::diff(nbh1, nbh2);
158  }
159 
160 # endif // ! MLN_INCLUDE_ONLY
161 
162 } // end of namespace mln
163 
164 
165 #endif // ! MLN_WIN_DIFF_HH