/* Copyright (c) 2008, 2009
 *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
 *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
 *      Micah Cowan (micah@cowan.name)
 *      Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
 * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
 *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
 *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
 * Copyright (c) 1987 Oliver Laumann
 *
 * 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 3, 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 (see the file COPYING); if not, see
 * https://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
 *
 ****************************************************************
 * $Id$ GNU
 */

#ifndef SCREEN_VIEWPORT_H
#define SCREEN_VIEWPORT_H

#include "canvas.h"

struct viewport
{
  struct viewport *v_next;	/* next vp on canvas */
  struct canvas   *v_canvas;	/* back pointer to canvas */
  int              v_xoff;	/* layer x offset on display */
  int              v_yoff;	/* layer y offset on display */
  int              v_xs;	/* vp upper left */
  int              v_xe;	/* vp upper right */
  int              v_ys;	/* vp lower left */
  int              v_ye;	/* vp lower right */
};

extern int    RethinkDisplayViewports __P((void));
extern void   RethinkViewportOffsets __P((struct canvas *));

#endif /* SCREEN_VIEWPORT_H */