pixel.cc

// Copyright (C) 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE)
//
// This file is part of Olena.
//
// Olena is free software: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation, version 2 of the License.
//
// Olena is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Olena.  If not, see <http://www.gnu.org/licenses/>.
//
// As a special exception, you may use this file as part of a free
// software project without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to produce
// an executable, this file does not by itself cause the resulting
// executable to be covered by the GNU General Public License.  This
// exception does not however invalidate any other reasons why the
// executable file might be covered by the GNU General Public License.

#include <mln/core/image/image2d.hh>
#include <mln/core/pixel.hh>
#include <mln/metal/equal.hh>
#include <mln/opt/at.hh>


int main()
{
  using namespace mln;

  typedef image2d<int> I;

  border::thickness = 0;
  I ima(3, 3);

  {
    pixel<I> pxl(ima, point2d(1, 1));
    pxl.val() = 51;
    mln_assertion(opt::at(ima, 1, 1) == 51);
  }

  {
    pixel<const I> pxl(ima, point2d(1, 1));
    opt::at(ima, 1, 1) = 51;
    mln_assertion(unsigned(pxl) == 4);
    mln_assertion(pxl.val() == 51);


    // hopefully the code below does not compile:
    // pxl.val() = 0;
    // assignment of read-only location
  }

  {
    mln::metal::equal< mln_image_(pixel<I>), I >::check();
    mln::metal::equal< mln_image_(pixel<const I>), const I >::check();
  }
}