From http://www.jwz.org/xscreensaver/xscreensaver-5.38.tar.gz

[xscreensaver] / hacks / slidescreen.c

diff --git a/hacks/slidescreen.c b/hacks/slidescreen.c
index 313f0eecff0ad5bce43621e379bf91e9095caf62..190f50711f8f8a205932ebb306dba3955a987fad 100644 (file)
--- a/hacks/slidescreen.c
+++ b/hacks/slidescreen.c
@@ -198,6 +198,16 @@ draw_grid (struct state *st)
   st->bitmap_w = xgwa.width;
   st->bitmap_h = xgwa.height;
 
+  if (xgwa.width < 50 || xgwa.height < 50) /* tiny window */
+    {
+      int s = (xgwa.width < xgwa.height ? xgwa.width : xgwa.height);
+      border = 1;
+      st->grid_size = s / 2;
+      if (st->grid_size < 16) st->grid_size = 16;
+      if (st->bitmap_w < st->grid_size*2) st->bitmap_w = st->grid_size*2;
+      if (st->bitmap_h < st->grid_size*2) st->bitmap_h = st->grid_size*2;
+    }
+
   st->grid_w = st->bitmap_w / st->grid_size;
   st->grid_h = st->bitmap_h / st->grid_size;
   st->hole_x = random () % st->grid_w;