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color_to_hex.hh
1 // Copyright (C) 2011 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.
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12 // General Public License for more details.
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15 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
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17 // As a special exception, you may use this file as part of a free
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19 // instantiate templates or use macros or inline functions from this
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24 // executable file might be covered by the GNU General Public License.
25 
26 #ifndef SCRIBO_UTIL_COLOR_TO_HEX_HH
27 # define SCRIBO_UTIL_COLOR_TO_HEX_HH
28 
32 
33 
34 #include <cstdio>
35 #include <iostream>
36 #include <string.h>
37 #include <mln/value/rgb8.hh>
38 
39 namespace scribo
40 {
41 
42  namespace util
43  {
44  using namespace mln;
45 
46  std::string color_to_hex(const value::rgb8& v);
47 
48 
49 # ifndef MLN_INCLUDE_ONLY
50 
51  inline
52  std::string color_to_hex(const value::rgb8& v)
53  {
54  std::string result = "#";
55 
56  char buf[3];
57 
58  int c = v.red();
59  sprintf(buf, "%.2X", c);
60  result.append(buf);
61 
62  c = v.green();
63  sprintf(buf, "%.2X", c);
64  result.append(buf);
65 
66  c = v.blue();
67  sprintf(buf, "%.2X", c);
68  result.append(buf);
69 
70  return result;
71  }
72 
73 # endif // ! MLN_INCLUDE_ONLY
74 
75  } // end of namespace scribo::util
76 
77 } // end of namespace scribo
78 
79 #endif // ! SCRIBO_UTIL_COLOR_TO_HEX_HH