src/viewport.h

   1 /* Copyright (c) 2008, 2009
   2  *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
   3  *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
   4  *      Micah Cowan (micah@cowan.name)
   5  *      Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
   6  * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
   7  *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
   8  *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
   9  * Copyright (c) 1987 Oliver Laumann
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 3, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program (see the file COPYING); if not, see
  23  * http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
  24  * 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
  25  *
  26  ****************************************************************
  27  * $Id$ GNU
  28  */
  29
  30 #ifndef SCREEN_VIEWPORT_H
  31 #define SCREEN_VIEWPORT_H
  32
  33 #include "canvas.h"
  34
  35 struct viewport
  36 {
  37   struct viewport *v_next;      /* next vp on canvas */
  38   struct canvas   *v_canvas;    /* back pointer to canvas */
  39   int              v_xoff;      /* layer x offset on display */
  40   int              v_yoff;      /* layer y offset on display */
  41   int              v_xs;        /* vp upper left */
  42   int              v_xe;        /* vp upper right */
  43   int              v_ys;        /* vp lower left */
  44   int              v_ye;        /* vp lower right */
  45 };
  46
  47 extern int    RethinkDisplayViewports __P((void));
  48 extern void   RethinkViewportOffsets __P((struct canvas *));
  49
  50 #endif /* SCREEN_VIEWPORT_H */
  51