X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/3e17893b1f77346f1e2460968f54b1d1468ef81f..ecf5542e8790a5ed2a77d7e50bd62fdb91d59d1d:/misc.c

diff --git a/misc.c b/misc.c
index 11c842c..fe41332 100644
--- a/misc.c
+++ b/misc.c
@@ -187,8 +187,10 @@ void game_mkhighlight_specific(frontend *fe, float *ret,
     }
 
     for (i = 0; i < 3; i++) {
-        ret[highlight * 3 + i] = ret[background * 3 + i] * 1.2F;
-        ret[lowlight * 3 + i] = ret[background * 3 + i] * 0.8F;
+	if (highlight >= 0)
+	    ret[highlight * 3 + i] = ret[background * 3 + i] * 1.2F;
+	if (lowlight >= 0)
+	    ret[lowlight * 3 + i] = ret[background * 3 + i] * 0.8F;
     }
 }
 
@@ -244,6 +246,18 @@ void draw_rect_outline(drawing *dr, int x, int y, int w, int h, int colour)
     draw_polygon(dr, coords, 4, -1, colour);
 }
 
+void draw_rect_corners(drawing *dr, int cx, int cy, int r, int col)
+{
+    draw_line(dr, cx - r, cy - r, cx - r, cy - r/2, col);
+    draw_line(dr, cx - r, cy - r, cx - r/2, cy - r, col);
+    draw_line(dr, cx - r, cy + r, cx - r, cy + r/2, col);
+    draw_line(dr, cx - r, cy + r, cx - r/2, cy + r, col);
+    draw_line(dr, cx + r, cy - r, cx + r, cy - r/2, col);
+    draw_line(dr, cx + r, cy - r, cx + r/2, cy - r, col);
+    draw_line(dr, cx + r, cy + r, cx + r, cy + r/2, col);
+    draw_line(dr, cx + r, cy + r, cx + r/2, cy + r, col);
+}
+
 void move_cursor(int button, int *x, int *y, int maxw, int maxh, int wrap)
 {
     int dx = 0, dy = 0;