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An Image Processing Platform
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dashed_line.hh
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26 
27 #ifndef MLN_DRAW_DASHED_LINE_HH
28 # define MLN_DRAW_DASHED_LINE_HH
29 
35 
36 # include <mln/core/concept/function.hh>
37 # include <mln/core/concept/image.hh>
38 # include <mln/core/site_set/p_line2d.hh>
39 # include <mln/core/image/imorph/safe.hh>
40 # include <mln/core/image/dmorph/image_if.hh>
41 # include <mln/data/paste.hh>
42 # include <mln/pw/image.hh>
43 # include <mln/pw/cst.hh>
44 
45 
46 namespace mln
47 {
48 
49  namespace draw
50  {
51 
66  template <typename I>
67  void dashed_line(Image<I>& ima,
68  const mln_psite(I)& beg, const mln_psite(I)& end,
69  const mln_value(I)& v);
70 
71 
72 # ifndef MLN_INCLUDE_ONLY
73 
74  namespace internal
75  {
76 
77  template <typename I, unsigned dim>
78  struct dashed_line_f : Function_v2b<dashed_line_f<I, dim> >
79  {
80  typedef bool result;
81 
82  bool operator()(const mln_site(I)& p) const
83  {
84  return p[dim] % 2;
85  }
86 
87  };
88 
89  } // end of namespace mln::draw::internal
90 
91 
92 
93  template <typename I>
94  inline
95  void dashed_line(Image<I>& ima_,
96  const mln_psite(I)& beg, const mln_psite(I)& end,
97  const mln_value(I)& v)
98  {
99  I& ima = exact(ima_);
100  mln_precondition(ima.is_valid());
101 
102  if (! ima.has(beg))
103  mln_trace_warning("Begin site is not part of the given image.");
104  if (! ima.has(end))
105  mln_trace_warning("End site is not part of the given image.");
106 
108  | p_line2d(beg, end)
109  | internal::dashed_line_f<I, 1>(),
110  safe(ima).rw());
111  }
112 
113 # endif // ! MLN_INCLUDE_ONLY
114 
115  } // end of namespace mln::draw
116 
117 } // end of namespace mln
118 
119 
120 #endif // ! MLN_DRAW_DASHED_LINE_HH