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detach_point.hh
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25 
26 #ifndef MLN_TOPO_DETACH_POINT_HH
27 # define MLN_TOPO_DETACH_POINT_HH
28 
31 
32 # include <mln/metal/equal.hh>
33 
34 # include <mln/core/image/image2d.hh>
35 # include <mln/core/alias/point2d.hh>
36 
37 namespace mln
38 {
39 
40  namespace topo
41  {
42 
44  template <typename I>
46  {
47  public:
49  detach_point();
50 
54  detach_point(Image<I>& ima);
55 
57  void set_image(Image<I>& ima);
58 
60  void operator()(const mln_psite(I)& p) const;
61 
62  private:
64  I* ima_;
65  };
66 
67 
68 
69 # ifndef MLN_INCLUDE_ONLY
70 
71  template <typename I>
72  inline
74  : ima_(0)
75  {
76  // Ensure I is a binary image type.
77  /* FIXME: Not compatible with proxy/morphers on values. */
78  mlc_equal(mln_value(I), bool)::check();
79  }
80 
81  template <typename I>
82  inline
84  : ima_(exact(&ima))
85  {
86  // Ensure I is a binary image type.
87  /* FIXME: Not compatible with proxy/morphers on values. */
88  mlc_equal(mln_value(I), bool)::check();
89  }
90 
91  template <typename I>
92  inline
93  void
94  detach_point<I>::set_image(Image<I>& ima)
95  {
96  ima_ = exact(&ima);
97  }
98 
99  template <typename I>
100  inline
101  void
102  detach_point<I>::operator()(const mln_psite(I)& p) const
103  {
104  mln_precondition(ima_);
105  (*ima_)(p) = false;
106  }
107 
108 # endif // MLN_INCLUDE_ONLY
109 
110  } // end of namespace mln::topo
111 
112 } // end of namespace mln
113 
114 #endif // ! MLN_TOPO_DETACH_POINT_HH