Imported Upstream version 4.1.0~20110819git450e8f3upstream/4.1.0_20110819git450e8f3

1 files changed, 140 insertions, 0 deletions

diff --git a/viewport.c b/viewport.c
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index 0000000..f1607d5
--- /dev/null
+++ b/viewport.c
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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
+ * http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
+ *
+ ****************************************************************
+ */
+
+#include "config.h"
+#include "screen.h"
+#include "extern.h"
+#include "viewport.h"
+
+extern struct display *display;
+
+int
+RethinkDisplayViewports()
+{
+  struct canvas *cv;
+  struct viewport *vp, *vpn;
+
+  /* free old viewports */
+  for (cv = display->d_cvlist; cv; cv = cv->c_next)
+    {
+      for (vp = cv->c_vplist; vp; vp = vpn)
+	{
+	  vp->v_canvas = 0;
+	  vpn = vp->v_next;
+          bzero((char *)vp, sizeof(*vp));
+          free(vp);
+	}
+      cv->c_vplist = 0;
+    }
+  display->d_vpxmin = -1;
+  display->d_vpxmax = -1;
+
+  for (cv = display->d_cvlist; cv; cv = cv->c_next)
+    {
+      if ((vp = (struct viewport *)malloc(sizeof *vp)) == 0)
+	return -1;
+#ifdef HOLE
+      vp->v_canvas = cv;
+      vp->v_xs = cv->c_xs;
+      vp->v_ys = (cv->c_ys + cv->c_ye) / 2;
+      vp->v_xe = cv->c_xe;
+      vp->v_ye = cv->c_ye;
+      vp->v_xoff = cv->c_xoff;
+      vp->v_yoff = cv->c_yoff;
+      vp->v_next = cv->c_vplist;
+      cv->c_vplist = vp;
+
+      if ((vp = (struct viewport *)malloc(sizeof *vp)) == 0)
+	return -1;
+      vp->v_canvas = cv;
+      vp->v_xs = (cv->c_xs + cv->c_xe) / 2;
+      vp->v_ys = (3 * cv->c_ys + cv->c_ye) / 4;
+      vp->v_xe = cv->c_xe;
+      vp->v_ye = (cv->c_ys + cv->c_ye) / 2 - 1;
+      vp->v_xoff = cv->c_xoff;
+      vp->v_yoff = cv->c_yoff;
+      vp->v_next = cv->c_vplist;
+      cv->c_vplist = vp;
+
+      if ((vp = (struct viewport *)malloc(sizeof *vp)) == 0)
+	return -1;
+      vp->v_canvas = cv;
+      vp->v_xs = cv->c_xs;
+      vp->v_ys = (3 * cv->c_ys + cv->c_ye) / 4;
+      vp->v_xe = (3 * cv->c_xs + cv->c_xe) / 4 - 1;
+      vp->v_ye = (cv->c_ys + cv->c_ye) / 2 - 1;
+      vp->v_xoff = cv->c_xoff;
+      vp->v_yoff = cv->c_yoff;
+      vp->v_next = cv->c_vplist;
+      cv->c_vplist = vp;
+
+      if ((vp = (struct viewport *)malloc(sizeof *vp)) == 0)
+	return -1;
+      vp->v_canvas = cv;
+      vp->v_xs = cv->c_xs;
+      vp->v_ys = cv->c_ys;
+      vp->v_xe = cv->c_xe;
+      vp->v_ye = (3 * cv->c_ys + cv->c_ye) / 4 - 1;
+      vp->v_xoff = cv->c_xoff;
+      vp->v_yoff = cv->c_yoff;
+      vp->v_next = cv->c_vplist;
+      cv->c_vplist = vp;
+#else
+      vp->v_canvas = cv;
+      vp->v_xs = cv->c_xs;
+      vp->v_ys = cv->c_ys;
+      vp->v_xe = cv->c_xe;
+      vp->v_ye = cv->c_ye;
+      vp->v_xoff = cv->c_xoff;
+      vp->v_yoff = cv->c_yoff;
+      vp->v_next = cv->c_vplist;
+      cv->c_vplist = vp;
+#endif
+
+      if (cv->c_xs < display->d_vpxmin || display->d_vpxmin == -1)
+        display->d_vpxmin = cv->c_xs;
+      if (cv->c_xe > display->d_vpxmax || display->d_vpxmax == -1)
+        display->d_vpxmax = cv->c_xe;
+    }
+  return 0;
+}
+
+void
+RethinkViewportOffsets(cv)
+struct canvas *cv;
+{
+  struct viewport *vp;
+
+  for (vp = cv->c_vplist; vp; vp = vp->v_next)
+    {
+      vp->v_xoff = cv->c_xoff;
+      vp->v_yoff = cv->c_yoff;
+    }
+}
+
+