From http://www.jwz.org/xscreensaver/xscreensaver-5.39.tar.gz

[xscreensaver] / hacks / anemotaxis.c

diff --git a/hacks/anemotaxis.c b/hacks/anemotaxis.c
index 50f35348566189649de37857af8a438fd25ddfda..9f240e8f9d13434d7361fca57c656e34a3b77818 100644 (file)
--- a/hacks/anemotaxis.c
+++ b/hacks/anemotaxis.c
@@ -403,7 +403,7 @@ anemotaxis_init (Display *disp, Window win)
 
   st->dbuf = True;
 
-# ifdef HAVE_COCOA     /* Don't second-guess Quartz's double-buffering */
+# ifdef HAVE_JWXYZ     /* Don't second-guess Quartz's double-buffering */
     st->dbuf = False;
 # endif
 
@@ -511,13 +511,15 @@ static void draw_image(struct state *st, Drawable curr_window)
 
     for(j = 0; j < st->source[i]->n; j++) {
 
+      int size = (st->scrWidth > 2560 ? 8 : 4);  /* Retina displays */
+
       if(st->source[i]->yv[j].v == 2)
        continue;
 
       /* Move the particles slightly off lattice */
       x =  X(st->source[i]->r.x + 1 + j) + RND(st->dx);
       y = Y(st->source[i]->r.y + st->source[i]->yv[j].y) + RND(st->dy);
-      XFillArc(st->dpy, curr_window, st->gcDraw, x - 2, y - 2, 4, 4, 0, 360 * 64);
+      XFillArc(st->dpy, curr_window, st->gcDraw, x - size/2, y - size/2, size, size, 0, 360 * 64);
     }
 
   }