Milena (Olena)  User documentation 2.0a Id
 All Classes Namespaces Functions Variables Typedefs Enumerator Groups Pages
fun/component/comp.hh
1 // Copyright (C) 2007, 2008, 2009 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 inline 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_FUN_COMPONENT_COMP_HH
27 # define MLN_FUN_COMPONENT_COMP_HH
28 
32 
33 # include <mln/fun/unary_param.hh>
34 # include <mln/value/rgb.hh>
35 # include <mln/value/int_u.hh>
36 # include <mln/algebra/vec.hh>
37 
38 namespace mln
39 {
40 
41  namespace fun
42  {
43 
44  struct comp : unary_param<comp,unsigned>
45  {
46  comp() : unary_param<comp,unsigned>(0) {};
47  comp(unsigned i) : unary_param<comp,unsigned>(i) {};
48  };
49 
50  } // end of namespace mln::fun
51 
52 # ifndef MLN_INCLUDE_ONLY
53 
54  namespace trait
55  {
56 
57  namespace next
58  {
59 
60  template <unsigned n>
61  struct set_precise_unary_<mln::fun::comp, mln::value::rgb<n> >
62  {
63  typedef set_precise_unary_ ret;
64 
65  typedef mln::value::rgb<n> argument;
66  typedef mln::value::int_u<n> result;
67  typedef argument& lvalue;
68 
69  static result read(unsigned p_i, const argument& v)
70  {
71  return v.comp(p_i);
72  }
73 
74  static void write(unsigned p_i, lvalue l, const result& x)
75  {
76  l.comp(p_i) = x;
77  }
78  };
79 
80  template <unsigned n, typename T>
81  struct set_precise_unary_<mln::fun::comp, mln::algebra::vec<n,T> >
82  {
83  typedef set_precise_unary_ ret;
84 
85  typedef mln::algebra::vec<n,T> argument;
86  typedef T result;
87  typedef argument& lvalue;
88 
89  static result read(unsigned p_i, const argument& v)
90  {
91  return v[p_i];
92  }
93 
94  static void write(unsigned p_i, lvalue l, const result& x)
95  {
96  l[p_i] = x;
97  }
98  };
99 
100  } // end of namespace mln::trait::next
101 
102  } // end of namespace mln::trait
103 
104 # endif // ! MLN_INCLUDE_ONLY
105 
106 } // end of namespace mln
107 
108 #endif // ! MLN_FUN_COMPONENT_COMP_HH