File: boundary.h

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/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * This program 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *
 * Adapted to ASEPRITE by David Capello (2001-2012)
 * See "LICENSE.txt" for more information.
 */

#ifndef APP_UTIL_BOUNDARY_H_INCLUDED
#define APP_UTIL_BOUNDARY_H_INCLUDED
#pragma once

namespace raster {
  class Image;  
}

namespace app {
  using namespace raster;

  enum BoundaryType {
    WithinBounds,
    IgnoreBounds
  };

  struct BoundSeg {
    int x1, y1, x2, y2;
    unsigned open : 1;
    unsigned visited : 1;
  };

  // The returned pointer must be freed using base_free() function.
  BoundSeg* find_mask_boundary(const Image* maskPR, int* num_elems,
                               BoundaryType type, int x1, int y1, int x2, int y2);

  BoundSeg* sort_boundary(BoundSeg* segs, int num_segs, int* num_groups);

  // Call this function when you don't use find_mask_boundary() anymore (e.g. atexit()).
  void boundary_exit();

} // namespace app

#endif