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+/* 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 */
+