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

[xscreensaver] / hacks / penrose.c

diff --git a/hacks/penrose.c b/hacks/penrose.c
index a0afd6e5720a97681a2f5eecdba745fe4fe8d88f..6317cb645377eed7f595b2526a8737fa9e95368a 100644 (file)
--- a/hacks/penrose.c
+++ b/hacks/penrose.c
@@ -311,7 +311,7 @@ static angle_c vtype_angles[] =
 typedef struct {
        int         width, height;
        XPoint      origin;
-       int         edge_length;
+       int         edge_length, line_width;
        fringe_c    fringe;
        forced_pool_c forced;
        int         done, failures;
@@ -458,6 +458,13 @@ init_penrose(ModeInfo * mi)
                                  MI_NPIXELS(mi) / 6) % MI_NPIXELS(mi);
        }
        size = MI_SIZE(mi);
+    tp->line_width = 1;
+
+   if (MI_WIDTH(mi) > 2560) {  /* Retina displays */
+     size *= 3;
+     tp->line_width *= 3;
+   }
+
        if (size < -MINSIZE)
                tp->edge_length = NRAND(MIN(-size, MAX(MINSIZE,
                   MIN(tp->width, tp->height) / 2)) - MINSIZE + 1) + MINSIZE;
@@ -684,6 +691,8 @@ draw_tile(fringe_node_c * v1, fringe_node_c * v2,
                XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
        XFillPolygon(display, window, gc, pts, 4, Convex, CoordModeOrigin);
        XSetForeground(display, gc, MI_BLACK_PIXEL(mi));
+    XSetLineAttributes(display, gc, tp->line_width,
+                       LineSolid, CapNotLast, JoinMiter);
        XDrawLines(display, window, gc, pts, 5, CoordModeOrigin);
 
        if (tp->ammann) {