http://packetstormsecurity.org/UNIX/admin/xscreensaver-4.00.tar.gz

[xscreensaver] / hacks / slidescreen.c

diff --git a/hacks/slidescreen.c b/hacks/slidescreen.c
index 9415ac22049aaccd5842e29d0b1784558e8aee97..e31bcf0dda9e60ba20d340c02f1c576e9ba83d5b 100644 (file)
--- a/hacks/slidescreen.c
+++ b/hacks/slidescreen.c
@@ -1,4 +1,4 @@
-/* xscreensaver, Copyright (c) 1992, 1993, 1994, 1996, 1997 
+/* xscreensaver, Copyright (c) 1992, 1993, 1994, 1996, 1997, 1998, 2001 
  * Jamie Zawinski <jwz@jwz.org>
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
@@ -37,8 +37,6 @@ init_slide (Display *dpy, Window window)
 
   XGetWindowAttributes (dpy, window, &xgwa);
   grab_screen_image (xgwa.screen, window);
-
-  XGetWindowAttributes (dpy, window, &xgwa);  /* re-retrieve colormap */
   cmap = xgwa.colormap;
   visual = xgwa.visual;
   max_width = xgwa.width;
@@ -50,6 +48,12 @@ init_slide (Display *dpy, Window window)
   pix_inc = get_integer_resource ("pixelIncrement", "Integer");
   border = get_integer_resource ("internalBorderWidth", "InternalBorderWidth");
 
+  /* Don't let the grid be smaller than 3x3 */
+  if (grid_size > xgwa.width / 3)
+    grid_size = xgwa.width / 3;
+  if (grid_size > xgwa.height / 3)
+    grid_size = xgwa.height / 3;
+
   {
     XColor fgc, bgc;
     char *fgs = get_string_resource("background", "Background");
@@ -142,7 +146,7 @@ init_slide (Display *dpy, Window window)
   if (delay < 0) delay = 0;
   if (delay2 < 0) delay2 = 0;
   if (pix_inc < 1) pix_inc = 1;
-  if (grid_size < 1) grid_size = 1;
+  if (grid_size < 10) grid_size = 10;
 
   gcv.foreground = fg;
   gcv.function = GXcopy;
@@ -197,7 +201,7 @@ init_slide (Display *dpy, Window window)
       XFillRectangle (dpy, d, gc, 0, bitmap_h - yoff, bitmap_w, yoff);
     }
 
-  XSync (dpy, True);
+  XSync (dpy, False);
   if (delay2) usleep (delay2 * 2);
  for (i = 0; i < grid_size; i += pix_inc)
    {
@@ -228,7 +232,7 @@ init_slide (Display *dpy, Window window)
      points[2].y = points[1].y;
      XFillPolygon (dpy, window, gc, points, 3, Convex, CoordModeOrigin);
 
-     XSync (dpy, True);
+     XSync (dpy, False);
      if (delay) usleep (delay);
    }
 
@@ -309,7 +313,7 @@ slide1 (Display *dpy, Window window)
         break;
        }
 
-     XSync (dpy, True);
+     XSync (dpy, False);
      if (delay) usleep (delay);
    }
  switch (dir)
@@ -357,6 +361,7 @@ screenhack (Display *dpy, Window window)
   while (1)
     {
       slide1 (dpy, window);
+      screenhack_handle_events (dpy);
       if (delay2) usleep (delay2);
     }
 }