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Olena  User documentation 2.1
An Image Processing Platform
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pixel.cc
1 // Copyright (C) 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE)
2 //
3 // This file is part of Olena.
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5 // Olena is free software: you can redistribute it and/or modify it under
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7 // Software Foundation, version 2 of the License.
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15 // along with Olena. If not, see <http://www.gnu.org/licenses/>.
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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 #include <mln/core/image/image2d.hh>
27 #include <mln/core/pixel.hh>
28 #include <mln/metal/equal.hh>
29 #include <mln/opt/at.hh>
30 
31 
32 int main()
33 {
34  using namespace mln;
35 
36  typedef image2d<int> I;
37 
39  I ima(3, 3);
40 
41  {
42  pixel<I> pxl(ima, point2d(1, 1));
43  pxl.val() = 51;
44  mln_assertion(opt::at(ima, 1, 1) == 51);
45  }
46 
47  {
48  pixel<const I> pxl(ima, point2d(1, 1));
49  opt::at(ima, 1, 1) = 51;
50  mln_assertion(unsigned(pxl) == 4);
51  mln_assertion(pxl.val() == 51);
52 
53 
54  // hopefully the code below does not compile:
55  // pxl.val() = 0;
56  // assignment of read-only location
57  }
58 
59  {
60  mln::metal::equal< mln_image_(pixel<I>), I >::check();
61  mln::metal::equal< mln_image_(pixel<const I>), const I >::check();
62  }
63 }