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dashed_line.hh
1 // Copyright (C) 2010 EPITA Research and Development Laboratory (LRDE)
2 //
3 // This file is part of Olena.
4 //
5 // Olena is free software: you can redistribute it and/or modify it under
6 // the terms of the GNU General Public License as published by the Free
7 // Software Foundation, version 2 of the License.
8 //
9 // Olena is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 // General Public License for more details.
13 //
14 // You should have received a copy of the GNU General Public License
15 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
16 //
17 // As a special exception, you may use this file as part of a free
18 // software project without restriction. Specifically, if other files
19 // instantiate templates or use macros or indashed_line functions from this
20 // file, or you compile this file and link it with other files to produce
21 // an executable, this file does not by itself cause the resulting
22 // executable to be covered by the GNU General Public License. This
23 // exception does not however invalidate any other reasons why the
24 // executable file might be covered by the GNU General Public License.
25 
26 #ifndef MLN_DRAW_DASHED_LINE_HH
27 # define MLN_DRAW_DASHED_LINE_HH
28 
33 
34 # include <mln/core/concept/function.hh>
35 # include <mln/core/concept/image.hh>
36 # include <mln/core/site_set/p_line2d.hh>
37 # include <mln/core/image/imorph/safe.hh>
38 # include <mln/data/fill.hh>
39 # include <mln/pw/image.hh>
40 # include <mln/pw/cst.hh>
41 
42 
43 namespace mln
44 {
45 
46  namespace draw
47  {
48 
62  template <typename I>
63  void dashed_line(Image<I>& ima,
64  const mln_psite(I)& beg, const mln_psite(I)& end,
65  const mln_value(I)& v);
66 
67 
68 # ifndef MLN_INCLUDE_ONLY
69 
70  namespace internal
71  {
72 
73  template <typename I, unsigned dim>
74  struct dashed_line_f : Function_v2b<dashed_line_f<I, dim> >
75  {
76  typedef bool result;
77 
78  bool operator()(const mln_site(I)& p) const
79  {
80  return p[dim] % 2;
81  }
82 
83  };
84 
85  } // end of namespace mln::draw::internal
86 
87 
88 
89  template <typename I>
90  inline
91  void dashed_line(Image<I>& ima_,
92  const mln_psite(I)& beg, const mln_psite(I)& end,
93  const mln_value(I)& v)
94  {
95  I& ima = exact(ima_);
96  mln_precondition(ima.is_valid());
97 
98  if (! ima.has(beg))
99  trace::warning("Begin site is not part of the given image.");
100  if (! ima.has(end))
101  trace::warning("End site is not part of the given image.");
102 
103  data::fill(((ima | p_line2d(beg, end)).rw() | internal::dashed_line_f<I, 1>()).rw(), v);
104  }
105 
106 # endif // ! MLN_INCLUDE_ONLY
107 
108  } // end of namespace mln::draw
109 
110 } // end of namespace mln
111 
112 
113 #endif // ! MLN_DRAW_DASHED_LINE_HH