puzzles: resync with upstream (adds new Palisade cursor interface).

Resyncs properly with this slightly modified upstream:

https://www.franklinwei.com/git/puzzles/commit/?h=rockbox-devel&id=1c62dac3f4f1a819a394ff33cc82912cf9079b50

Change-Id: I2018e81647c22010f9d74d8d14d13982f2969a8f

1 files changed, 3 insertions, 2 deletions

diff --git a/apps/plugins/puzzles/src/signpost.c b/apps/plugins/puzzles/src/signpost.c
index 9aed67bb4a..4d2f5849fd 100644
--- a/apps/plugins/puzzles/src/signpost.c
+++ b/apps/plugins/puzzles/src/signpost.c
@@ -1895,8 +1895,9 @@ static void draw_star(drawing *dr, int cx, int cy, int rad, int npoints,
     coords = snewn(npoints * 2 * 2, int);
 
     for (n = 0; n < npoints * 2; n++) {
-        a = 2.0 * PI * ((double)n / ((double)npoints * 2.0)) + angle_offset;
-        r = (n % 2) ? (double)rad/2.0 : (double)rad;
+        /* hack to accomodate rockbox's concave polygon drawing */
+        a = 2.0 * PI * ((double)n / ((double)npoints * 2.0)) + angle_offset - PI / npoints;
+        r = (n % 2 == 0) ? (double)rad/2.0 : (double)rad;
 
         /* We're rotating the point at (0, -r) by a degrees */
         coords[2*n+0] = cx + (int)( r * sin(a));