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z_order.hh
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26 
27 #ifndef MLN_DEBUG_Z_ORDER_HH
28 # define MLN_DEBUG_Z_ORDER_HH
29 
33 
34 
35 # include <mln/core/concept/image.hh>
36 
37 
38 namespace mln
39 {
40 
41  namespace debug
42  {
43 
51  template <typename I>
52  void z_order(Image<I>& input);
53 
54 
55 # ifndef MLN_INCLUDE_ONLY
56 
57 
58  // Implementations.
59 
60  namespace impl
61  {
62 
63  namespace generic
64  {
65 
66  template <typename I>
67  inline
68  void
69  z_order(Image<I>& input)
70  {
71  unsigned row, col;
72  mln_piter(I) p(input.domain());
73  for_all(p)
74  {
75  row = p.row();
76  col = p.col();
77 
78  mln_value(I)& v = input(p);
79  v = 0;
80  int mask = 0x00000001;
81  int i = 1;
82  while (row > 0 || col > 0)
83  {
84  if (i % 2)
85  {
86  if (col & 0x0000001)
87  v = v | mask;
88  col = col >> 1;
89  }
90  else
91  {
92  if (row & 0x0000001)
93  v = v | mask;
94  row = row >> 1;
95  }
96 
97  mask = mask << 1;
98  ++i;
99  }
100  }
101 
102  }
103 
104 
105  } // end of namespace mln::debug::impl::generic
106 
107 
108  } // end of namespace mln::debug::impl
109 
110 
111 
112  // Dispatch
113 
114  namespace internal
115  {
116 
117  template <typename I>
118  inline
119  void
120  z_order_dispatch(trait::image::speed::any, Image<I>& input)
121  {
122  impl::generic::z_order(input);
123  }
124 
125 
126  template <typename I>
127  inline
128  void
129  z_order_dispatch(Image<I>& input)
130  {
131  z_order_dispatch(mln_trait_image_speed(I)(), input);
132  }
133 
134  }
135 
136 
137  // Facade
138 
139  template <typename I>
140  inline
141  void
143  {
144  trace::entering("debug::z_order");
145  mln_precondition(exact(input).is_valid());
146 
147  internal::z_order_dispatch(input);
148 
149  trace::exiting("debug::z_order");
150  }
151 
152 # endif // ! MLN_INCLUDE_ONLY
153 
154  } // end of namespace mln::debug
155 
156 } // end of namespace mln
157 
158 
159 #endif // ! MLN_DEBUG_Z_ORDER_HH