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snake_vert.hh
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// Copyright (C) 2007, 2008, 2009, 2011, 2012 EPITA Research and
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// Development Laboratory (LRDE)
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//
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// This file is part of Olena.
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//
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// Olena is free software: you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation, version 2 of the License.
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//
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// Olena is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Olena. If not, see <http://www.gnu.org/licenses/>.
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//
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// As a special exception, you may use this file as part of a free
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// software project without restriction. Specifically, if other files
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// instantiate templates or use macros or inline functions from this
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// file, or you compile this file and link it with other files to produce
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// an executable, this file does not by itself cause the resulting
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// executable to be covered by the GNU General Public License. This
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// exception does not however invalidate any other reasons why the
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// executable file might be covered by the GNU General Public License.
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#ifndef MLN_CANVAS_BROWSING_SNAKE_VERT_HH
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# define MLN_CANVAS_BROWSING_SNAKE_VERT_HH
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# include <mln/core/concept/browsing.hh>
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# include <mln/geom/size2d.hh>
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namespace
mln
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{
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namespace
canvas
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{
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namespace
browsing
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{
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struct
snake_vert_t
:
public
Browsing
< snake_vert_t >
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{
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// This default constructor is needed for compilation with gcc
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// 4.6.0, gcc 4.6.1 and Clang.
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snake_vert_t
();
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template
<
typename
F>
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void
operator()
(F& f)
const
;
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};
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extern
const
snake_vert_t
snake_vert
;
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# ifndef MLN_INCLUDE_ONLY
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# ifndef MLN_WO_GLOBAL_VARS
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const
snake_vert_t
snake_vert
;
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# endif // ! MLN_WO_GLOBAL_VARS
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inline
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snake_vert_t::snake_vert_t
()
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{
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}
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template
<
typename
F>
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inline
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void
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snake_vert_t::operator()
(F& f)
const
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{
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// FIXME: Check the dimension of the input
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// mlc_equal(mln_trait_image_dimension(I)(),
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// trait::image::dimension::two_d)::check();
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mln_trace(
"canvas::browsing::snake_vert"
);
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mln_precondition(f.input.is_valid());
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int
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min_row
=
geom::min_row
(f.input),
max_row
=
geom::max_row
(f.input),
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min_col
=
geom::min_col
(f.input),
max_col
=
geom::max_col
(f.input);
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// p
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f.p = f.input.bbox().pmin();
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def::coord
& row = f.p.row();
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def::coord
& col = f.p.col();
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// initialization
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f.init();
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bool
down
=
true
;
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for
(col =
min_col
; col <=
max_col
; ++col)
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// FIXME: Add "if (f.input.has(p))"?
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{
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// go fwd
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f.fwd();
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if
(down)
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// browse col down.
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while
(row <
max_row
)
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{
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++row;
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f.down();
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}
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else
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// browse col up.
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while
(row > min_row)
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{
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--row;
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f.up();
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}
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// change browsing
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down = !
down
;
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}
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}
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# endif // ! MLN_INCLUDE_ONLY
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}
// end of namespace mln::canvas::browsing
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}
// end of namespace mln::canvas
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}
// end of namespace mln
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#endif // ! MLN_CANVAS_BROWSING_SNAKE_VERT_HH
mln
canvas
browsing
snake_vert.hh
Copyright (C) 2012 EPITA Research and Development Laboratory (LRDE)