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

46 files changed, 309 insertions, 128 deletions

diff --git a/apps/plugins/puzzles/help/blackbox.c b/apps/plugins/puzzles/help/blackbox.c
index f01852becf..c9afd8e9f0 100644
--- a/apps/plugins/puzzles/help/blackbox.c
+++ b/apps/plugins/puzzles/help/blackbox.c
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diff --git a/apps/plugins/puzzles/help/bridges.c b/apps/plugins/puzzles/help/bridges.c
index bd01c53426..5d4c878d7c 100644
--- a/apps/plugins/puzzles/help/bridges.c
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diff --git a/apps/plugins/puzzles/help/cube.c b/apps/plugins/puzzles/help/cube.c
index 21c3eb7cc3..f43131008e 100644
--- a/apps/plugins/puzzles/help/cube.c
+++ b/apps/plugins/puzzles/help/cube.c
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diff --git a/apps/plugins/puzzles/help/dominosa.c b/apps/plugins/puzzles/help/dominosa.c
index 34958feb22..d8613270df 100644
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+++ b/apps/plugins/puzzles/help/dominosa.c
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diff --git a/apps/plugins/puzzles/help/fifteen.c b/apps/plugins/puzzles/help/fifteen.c
index 7c0b4c8063..da982ea70a 100644
--- a/apps/plugins/puzzles/help/fifteen.c
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diff --git a/apps/plugins/puzzles/help/filling.c b/apps/plugins/puzzles/help/filling.c
index a5ccd6d1fb..abf379318d 100644
--- a/apps/plugins/puzzles/help/filling.c
+++ b/apps/plugins/puzzles/help/filling.c
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diff --git a/apps/plugins/puzzles/help/flip.c b/apps/plugins/puzzles/help/flip.c
index 91a0886b66..dbf0d1bcf4 100644
--- a/apps/plugins/puzzles/help/flip.c
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diff --git a/apps/plugins/puzzles/help/flood.c b/apps/plugins/puzzles/help/flood.c
index 48905fd784..38a43e6522 100644
--- a/apps/plugins/puzzles/help/flood.c
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diff --git a/apps/plugins/puzzles/help/galaxies.c b/apps/plugins/puzzles/help/galaxies.c
index 17b0d4a945..90d9332639 100644
--- a/apps/plugins/puzzles/help/galaxies.c
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diff --git a/apps/plugins/puzzles/help/guess.c b/apps/plugins/puzzles/help/guess.c
index 9749854e1e..87469c072a 100644
--- a/apps/plugins/puzzles/help/guess.c
+++ b/apps/plugins/puzzles/help/guess.c
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diff --git a/apps/plugins/puzzles/help/inertia.c b/apps/plugins/puzzles/help/inertia.c
index ba8d71d0a5..8817abd295 100644
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diff --git a/apps/plugins/puzzles/help/keen.c b/apps/plugins/puzzles/help/keen.c
index 9152fed158..93fd91266a 100644
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diff --git a/apps/plugins/puzzles/help/lightup.c b/apps/plugins/puzzles/help/lightup.c
index 874a05c596..5f2e3f5e06 100644
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diff --git a/apps/plugins/puzzles/help/loopy.c b/apps/plugins/puzzles/help/loopy.c
index 62ec8cfa0e..98b8b552c3 100644
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diff --git a/apps/plugins/puzzles/help/magnets.c b/apps/plugins/puzzles/help/magnets.c
index b89b23b097..e5c3a20d8e 100644
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diff --git a/apps/plugins/puzzles/help/map.c b/apps/plugins/puzzles/help/map.c
index 18b3fb5ace..4f3dd8346e 100644
--- a/apps/plugins/puzzles/help/map.c
+++ b/apps/plugins/puzzles/help/map.c
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diff --git a/apps/plugins/puzzles/help/mines.c b/apps/plugins/puzzles/help/mines.c
index 8a4f4038c0..9f8cd2133b 100644
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diff --git a/apps/plugins/puzzles/help/mosaic.c b/apps/plugins/puzzles/help/mosaic.c
index 835de1898d..6fb160f28c 100644
--- a/apps/plugins/puzzles/help/mosaic.c
+++ b/apps/plugins/puzzles/help/mosaic.c
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diff --git a/apps/plugins/puzzles/help/net.c b/apps/plugins/puzzles/help/net.c
index 9b42b5eca3..de900c1505 100644
--- a/apps/plugins/puzzles/help/net.c
+++ b/apps/plugins/puzzles/help/net.c
@@ -1,4 +1,4 @@
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diff --git a/apps/plugins/puzzles/help/netslide.c b/apps/plugins/puzzles/help/netslide.c
index e8d066e1fc..9c27f17e0d 100644
--- a/apps/plugins/puzzles/help/netslide.c
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diff --git a/apps/plugins/puzzles/help/palisade.c b/apps/plugins/puzzles/help/palisade.c
index 9b95b07eae..7626a87c56 100644
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+0x02, 0x12, 0x73, 0xdf, 0x02, 0x26, 0x60, 0x50, 0x12, 0x00,
+0x0d, 0xf8, 0x00, 0x33, 0x47, 0x61, 0x6d, 0xf8, 0x00, 0x02,
+0x00, 0x03, 0x32, 0x6c, 0x65, 0x74, 0xdf, 0x01, 0x72, 0x6f,
+0x6e, 0x66, 0x69, 0x67, 0x75, 0x72, 0x8c, 0x05, 0x84, 0x62,
+0x65, 0x68, 0x61, 0x76, 0x69, 0x6f, 0x72, 0xd7, 0x00, 0x03,
+0x32, 0x03, 0x01, 0x9d, 0x03, 0x2f, 0x74, 0x6f, 0x35, 0x03,
+0x04, 0x4f, 0x66, 0x75, 0x6c, 0x6c, 0x36, 0x03, 0x08, 0x04,
+0x34, 0x03, 0x08, 0x28, 0x05, 0xa0, 0x00, 0x73, 0x71, 0x75,
+0x61, 0x72, 0x65, 0x73, 0x2e, 0x00,
 };
 
-const unsigned short help_text_len = 1135;
-const unsigned short help_text_words = 193;
+const unsigned short help_text_len = 1672;
+const unsigned short help_text_words = 285;
 const char quick_help_text[] = "Divide the grid into equal-sized areas in accordance with the clues.";
diff --git a/apps/plugins/puzzles/help/pattern.c b/apps/plugins/puzzles/help/pattern.c
index b5775f32ed..3b83378bb5 100644
--- a/apps/plugins/puzzles/help/pattern.c
+++ b/apps/plugins/puzzles/help/pattern.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/pearl.c b/apps/plugins/puzzles/help/pearl.c
index b8f32ce3b8..2fa7ed9f14 100644
--- a/apps/plugins/puzzles/help/pearl.c
+++ b/apps/plugins/puzzles/help/pearl.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/pegs.c b/apps/plugins/puzzles/help/pegs.c
index b7159ffc5c..beb9dccca7 100644
--- a/apps/plugins/puzzles/help/pegs.c
+++ b/apps/plugins/puzzles/help/pegs.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/range.c b/apps/plugins/puzzles/help/range.c
index 5a9e3ab71d..379ad7a4f9 100644
--- a/apps/plugins/puzzles/help/range.c
+++ b/apps/plugins/puzzles/help/range.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/rect.c b/apps/plugins/puzzles/help/rect.c
index c608c4fc98..32205f0a9e 100644
--- a/apps/plugins/puzzles/help/rect.c
+++ b/apps/plugins/puzzles/help/rect.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/samegame.c b/apps/plugins/puzzles/help/samegame.c
index 87f7b2b3b9..8194a09227 100644
--- a/apps/plugins/puzzles/help/samegame.c
+++ b/apps/plugins/puzzles/help/samegame.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/signpost.c b/apps/plugins/puzzles/help/signpost.c
index e38e42870c..b7accfbada 100644
--- a/apps/plugins/puzzles/help/signpost.c
+++ b/apps/plugins/puzzles/help/signpost.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/singles.c b/apps/plugins/puzzles/help/singles.c
index f2bd1ae4d9..6d9559c095 100644
--- a/apps/plugins/puzzles/help/singles.c
+++ b/apps/plugins/puzzles/help/singles.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/sixteen.c b/apps/plugins/puzzles/help/sixteen.c
index 164be4ee4e..3c636677fb 100644
--- a/apps/plugins/puzzles/help/sixteen.c
+++ b/apps/plugins/puzzles/help/sixteen.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/slant.c b/apps/plugins/puzzles/help/slant.c
index 1a8168fb3b..a4e2fcb630 100644
--- a/apps/plugins/puzzles/help/slant.c
+++ b/apps/plugins/puzzles/help/slant.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/solo.c b/apps/plugins/puzzles/help/solo.c
index ceb05fa70e..ef09bf0afd 100644
--- a/apps/plugins/puzzles/help/solo.c
+++ b/apps/plugins/puzzles/help/solo.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/tents.c b/apps/plugins/puzzles/help/tents.c
index 11eeaef435..9b23b73fd2 100644
--- a/apps/plugins/puzzles/help/tents.c
+++ b/apps/plugins/puzzles/help/tents.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/towers.c b/apps/plugins/puzzles/help/towers.c
index b41fb7a432..c6a3aad003 100644
--- a/apps/plugins/puzzles/help/towers.c
+++ b/apps/plugins/puzzles/help/towers.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/tracks.c b/apps/plugins/puzzles/help/tracks.c
index fae974619a..fdc3f40e22 100644
--- a/apps/plugins/puzzles/help/tracks.c
+++ b/apps/plugins/puzzles/help/tracks.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/twiddle.c b/apps/plugins/puzzles/help/twiddle.c
index 1a989237b0..b34ff3b832 100644
--- a/apps/plugins/puzzles/help/twiddle.c
+++ b/apps/plugins/puzzles/help/twiddle.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/undead.c b/apps/plugins/puzzles/help/undead.c
index 2ad886cd0d..3c33147a66 100644
--- a/apps/plugins/puzzles/help/undead.c
+++ b/apps/plugins/puzzles/help/undead.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/unequal.c b/apps/plugins/puzzles/help/unequal.c
index 445fd7d544..342b0dc0aa 100644
--- a/apps/plugins/puzzles/help/unequal.c
+++ b/apps/plugins/puzzles/help/unequal.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/unruly.c b/apps/plugins/puzzles/help/unruly.c
index 39249c5949..627ffcc329 100644
--- a/apps/plugins/puzzles/help/unruly.c
+++ b/apps/plugins/puzzles/help/unruly.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/help/untangle.c b/apps/plugins/puzzles/help/untangle.c
index 64ebdfb364..9beb2a545f 100644
--- a/apps/plugins/puzzles/help/untangle.c
+++ b/apps/plugins/puzzles/help/untangle.c
@@ -1,4 +1,4 @@
-/* auto-generated on Jul 22 2024 by genhelp.sh */
+/* auto-generated on Jul 23 2024 by genhelp.sh */
 /* help text is compressed using LZ4; see compress.c for details */
 /* DO NOT EDIT! */
 
diff --git a/apps/plugins/puzzles/src/inertia.c b/apps/plugins/puzzles/src/inertia.c
index d120411f55..1d5a028add 100644
--- a/apps/plugins/puzzles/src/inertia.c
+++ b/apps/plugins/puzzles/src/inertia.c
@@ -1886,6 +1886,11 @@ static void draw_player(drawing *dr, game_drawstate *ds, int x, int y,
 	    coords[d*4+2] = x + TILESIZE/2 + (int)((TILESIZE*3/7) * x2);
 	    coords[d*4+3] = y + TILESIZE/2 + (int)((TILESIZE*3/7) * y2);
 	}
+        /* rockbox hack */
+        int tmp[2] = { coords[0], coords[1] };
+        memmove(coords, coords + 2, sizeof(int) * DIRECTIONS * 4 - 2);
+        memcpy(coords + DIRECTIONS * 4 - 2, tmp, 2 * sizeof(int));
+        
 	draw_polygon(dr, coords, DIRECTIONS*2, COL_DEAD_PLAYER, COL_OUTLINE);
     } else {
 	draw_circle(dr, x + TILESIZE/2, y + TILESIZE/2,
@@ -1901,8 +1906,6 @@ static void draw_player(drawing *dr, game_drawstate *ds, int x, int y,
 	int coords[14], *c;
 
 	c = coords;
-	*c++ = ox + px/9;
-	*c++ = oy + py/9;
 	*c++ = ox + px/9 + ax*2/3;
 	*c++ = oy + py/9 + ay*2/3;
 	*c++ = ox + px/3 + ax*2/3;
@@ -1915,6 +1918,8 @@ static void draw_player(drawing *dr, game_drawstate *ds, int x, int y,
 	*c++ = oy - py/9 + ay*2/3;
 	*c++ = ox - px/9;
 	*c++ = oy - py/9;
+	*c++ = ox + px/9;
+	*c++ = oy + py/9;
 	draw_polygon(dr, coords, 7, COL_HINT, COL_OUTLINE);
     }
 
diff --git a/apps/plugins/puzzles/src/mines.c b/apps/plugins/puzzles/src/mines.c
index e1441fae13..eec898ac6f 100644
--- a/apps/plugins/puzzles/src/mines.c
+++ b/apps/plugins/puzzles/src/mines.c
@@ -2867,12 +2867,12 @@ static void draw_tile(drawing *dr, game_drawstate *ds,
     coords[(n)*2+0] = x + (int)(TILE_SIZE * (dx)); \
     coords[(n)*2+1] = y + (int)(TILE_SIZE * (dy)); \
 } while (0)
-	    SETCOORD(0, 0.6F,  0.35F);
-	    SETCOORD(1, 0.6F,  0.7F);
-	    SETCOORD(2, 0.8F,  0.8F);
-	    SETCOORD(3, 0.25F, 0.8F);
-	    SETCOORD(4, 0.55F, 0.7F);
-	    SETCOORD(5, 0.55F, 0.35F);
+	    SETCOORD(0, 0.6F,  0.7F);
+	    SETCOORD(1, 0.8F,  0.8F);
+	    SETCOORD(2, 0.25F, 0.8F);
+	    SETCOORD(3, 0.55F, 0.7F);
+	    SETCOORD(4, 0.55F, 0.35F);
+	    SETCOORD(5, 0.6F,  0.35F);
 	    draw_polygon(dr, coords, 6, COL_FLAGBASE, COL_FLAGBASE);
 
 	    SETCOORD(0, 0.6F, 0.2F);
diff --git a/apps/plugins/puzzles/src/palisade.c b/apps/plugins/puzzles/src/palisade.c
index 811204b1fe..ecbbbb4d6f 100644
--- a/apps/plugins/puzzles/src/palisade.c
+++ b/apps/plugins/puzzles/src/palisade.c
@@ -868,18 +868,48 @@ static char *game_text_format(const game_state *state)
 }
 
 struct game_ui {
+    /* These are half-grid coordinates - (0,0) is the top left corner
+     * of the top left square; (1,1) is the center of the top left
+     * grid square. */
     int x, y;
     bool show;
+
+    bool legacy_cursor;
 };
 
 static game_ui *new_ui(const game_state *state)
 {
     game_ui *ui = snew(game_ui);
-    ui->x = ui->y = 0;
+    ui->x = ui->y = 1;
     ui->show = getenv_bool("PUZZLES_SHOW_CURSOR", false);
+    ui->legacy_cursor = false;
     return ui;
 }
 
+static config_item *get_prefs(game_ui *ui)
+{
+    config_item *cfg;
+
+    cfg = snewn(2, config_item);
+
+    cfg[0].name = "Cursor mode";
+    cfg[0].kw = "cursor-mode";
+    cfg[0].type = C_CHOICES;
+    cfg[0].u.choices.choicenames = ":Half-grid:Full-grid";
+    cfg[0].u.choices.choicekws = ":half:full";
+    cfg[0].u.choices.selected = ui->legacy_cursor;
+
+    cfg[1].name = NULL;
+    cfg[1].type = C_END;
+
+    return cfg;
+}
+
+static void set_prefs(game_ui *ui, const config_item *cfg)
+{
+    ui->legacy_cursor = cfg[0].u.choices.selected;
+}
+
 static void free_ui(game_ui *ui)
 {
     sfree(ui);
@@ -890,7 +920,7 @@ static void game_changed_state(game_ui *ui, const game_state *oldstate,
 {
 }
 
-typedef unsigned short dsflags;
+typedef int dsflags;
 
 struct game_drawstate {
     int tilesize;
@@ -921,9 +951,6 @@ static char *interpret_move(const game_state *state, game_ui *ui,
 
         if (OUT_OF_BOUNDS(gx, gy, w, h)) return NULL;
 
-        ui->x = gx;
-        ui->y = gy;
-
         /* find edge closest to click point */
         possible &=~ (2*px < TILESIZE ? BORDER_R : BORDER_L);
         possible &=~ (2*py < TILESIZE ? BORDER_D : BORDER_U);
@@ -934,6 +961,9 @@ static char *interpret_move(const game_state *state, game_ui *ui,
         for (dir = 0; dir < 4 && BORDER(dir) != possible; ++dir);
         if (dir == 4) return NULL; /* there's not exactly one such edge */
 
+        ui->x = min(max(2*gx + 1 + dx[dir], 1), 2*w-1);
+        ui->y = min(max(2*gy + 1 + dy[dir], 1), 2*h-1);
+
         hx = gx + dx[dir];
         hy = gy + dy[dir];
 
@@ -963,17 +993,17 @@ static char *interpret_move(const game_state *state, game_ui *ui,
     }
 
     if (IS_CURSOR_MOVE(button)) {
-        if (control || shift) {
+        if(ui->legacy_cursor && (control || shift)) {
             borderflag flag = 0, newflag;
-            int dir, i =  ui->y * w + ui->x;
+            int dir, i = (ui->y/2) * w + (ui->x/2);
             ui->show = true;
-            x = ui->x;
-            y = ui->y;
+            x = ui->x/2;
+            y = ui->y/2;
             move_cursor(button, &x, &y, w, h, false, NULL);
             if (OUT_OF_BOUNDS(x, y, w, h)) return NULL;
 
             for (dir = 0; dir < 4; ++dir)
-                if (dx[dir] == x - ui->x && dy[dir] == y - ui->y) break;
+                if (dx[dir] == x - ui->x/2 && dy[dir] == y - ui->y/2) break;
             if (dir == 4) return NULL; /* how the ... ?! */
 
             if (control) flag |= BORDER(dir);
@@ -987,9 +1017,67 @@ static char *interpret_move(const game_state *state, game_ui *ui,
             if (control) newflag |= BORDER(FLIP(dir));
             if (shift) newflag |= DISABLED(BORDER(FLIP(dir)));
             return string(80, "F%d,%d,%dF%d,%d,%d",
-                          ui->x, ui->y, flag, x, y, newflag);
-        } else
-            return move_cursor(button, &ui->x, &ui->y, w, h, false, &ui->show);
+                          ui->x/2, ui->y/2, flag, x, y, newflag);
+        } else {
+            /* TODO: Refactor this and other half-grid cursor games
+             * (Tracks, etc.) */
+            int dx = (button == CURSOR_LEFT) ? -1 : ((button == CURSOR_RIGHT) ? +1 : 0);
+            int dy = (button == CURSOR_DOWN) ? +1 : ((button == CURSOR_UP)    ? -1 : 0);
+
+            if(ui->legacy_cursor) {
+                dx *= 2; dy *= 2;
+
+                ui->x |= 1;
+                ui->y |= 1;
+            }
+
+            if (!ui->show) {
+                ui->show = true;
+            }
+
+            ui->x = min(max(ui->x + dx, 1), 2*w-1);
+            ui->y = min(max(ui->y + dy, 1), 2*h-1);
+
+            return MOVE_UI_UPDATE;
+        }
+    } else if (IS_CURSOR_SELECT(button)) {
+        int px = ui->x % 2, py = ui->y % 2;
+        int gx = ui->x / 2, gy = ui->y / 2;
+        int dir = (px == 0) ? 3 : 0; /* left = 3; up = 0 */
+        int hx = gx + dx[dir];
+        int hy = gy + dy[dir];
+
+        int i = gy * w + gx;
+
+        if(!ui->show) {
+            ui->show = true;
+            return MOVE_UI_UPDATE;
+        }
+
+        /* clicks on square corners and centers do nothing */
+        if (px == py)
+            return MOVE_NO_EFFECT;
+
+        /* TODO: Refactor this and the mouse click handling code
+         * above. */
+        switch ((button == CURSOR_SELECT2) |
+                ((state->borders[i] & BORDER(dir)) >> dir << 1) |
+                ((state->borders[i] & DISABLED(BORDER(dir))) >> dir >> 2)) {
+
+        case MAYBE_LEFT:
+        case ON_LEFT:
+        case ON_RIGHT:
+            return string(80, "F%d,%d,%dF%d,%d,%d",
+                          gx, gy, BORDER(dir),
+                          hx, hy, BORDER(FLIP(dir)));
+
+        case MAYBE_RIGHT:
+        case OFF_LEFT:
+        case OFF_RIGHT:
+            return string(80, "F%d,%d,%dF%d,%d,%d",
+                          gx, gy, DISABLED(BORDER(dir)),
+                          hx, hy, DISABLED(BORDER(FLIP(dir))));
+        }
     }
 
     return NULL;
@@ -1098,7 +1186,7 @@ static float *game_colours(frontend *fe, int *ncolours)
 #define F_ERROR_L BORDER_ERROR(BORDER_L) /* BIT(11) */
 #define F_ERROR_CLUE BIT(12)
 #define F_FLASH BIT(13)
-#define F_CURSOR BIT(14)
+#define CONTAINS_CURSOR(x) ((x) << 14)
 
 static game_drawstate *game_new_drawstate(drawing *dr, const game_state *state)
 {
@@ -1132,9 +1220,6 @@ static void draw_tile(drawing *dr, game_drawstate *ds, int r, int c,
     draw_rect(dr, x + WIDTH, y + WIDTH, TILESIZE - WIDTH, TILESIZE - WIDTH,
               (flags & F_FLASH ? COL_FLASH : COL_BACKGROUND));
 
-    if (flags & F_CURSOR)
-        draw_rect_corners(dr, x + CENTER, y + CENTER, TILESIZE / 3, COL_GRID);
-
     if (clue != EMPTY) {
         char buf[2];
         buf[0] = '0' + clue;
@@ -1158,6 +1243,47 @@ static void draw_tile(drawing *dr, game_drawstate *ds, int r, int c,
     draw_update(dr, x, y, TILESIZE + WIDTH, TILESIZE + WIDTH);
 }
 
+static void draw_cursor(drawing *dr, game_drawstate *ds,
+                        int cur_x, int cur_y, bool legacy_cursor)
+{
+    int off_x = cur_x % 2, off_y = cur_y % 2;
+
+    /* Figure out the tile coordinates corresponding to these cursor
+     * coordinates. */
+    int x = MARGIN + TILESIZE * (cur_x / 2), y = MARGIN + TILESIZE * (cur_y / 2);
+
+    /* off_x and off_y are either 0 or 1. The possible cases are
+     * therefore:
+     *
+     * (0, 0): the cursor is in the top left corner of the tile.
+     * (0, 1): the cursor is on the left border of the tile.
+     * (1, 0): the cursor is on the top border of the tile.
+     * (1, 1): the cursor is in the center of the tile.
+     */
+    enum { TOP_LEFT_CORNER, LEFT_BORDER, TOP_BORDER, TILE_CENTER } cur_type = (off_x << 1) + off_y;
+
+    int center_x = x + ((off_x == 0) ? WIDTH/2 : CENTER),
+        center_y = y + ((off_y == 0) ? WIDTH/2 : CENTER);
+
+    struct { int w, h; } cursor_dimensions[] = {
+        { TILESIZE / 3, TILESIZE / 3 },         /* top left corner */
+        { TILESIZE / 3, 2 * TILESIZE / 3},      /* left border */
+        { 2 * TILESIZE / 3, TILESIZE / 3},      /* top border */
+        { 2 * TILESIZE / 3, 2 * TILESIZE / 3 }  /* center */
+    }, *dims = cursor_dimensions + cur_type;
+
+    if(legacy_cursor && cur_type == TILE_CENTER)
+        draw_rect_corners(dr, center_x, center_y, TILESIZE / 3, COL_GRID);
+    else
+        draw_rect_outline(dr,
+                          center_x - dims->w / 2, center_y - dims->h / 2,
+                          dims->w, dims->h, COL_GRID);
+
+    draw_update(dr,
+                center_x - dims->w / 2, center_y - dims->h / 2,
+                dims->w, dims->h);
+}
+
 #define FLASH_TIME 0.7F
 
 static void game_redraw(drawing *dr, game_drawstate *ds,
@@ -1203,8 +1329,13 @@ static void game_redraw(drawing *dr, game_drawstate *ds,
             if (clue != EMPTY && (on > clue || clue > 4 - off))
                 flags |= F_ERROR_CLUE;
 
-            if (ui->show && ui->x == c && ui->y == r)
-                flags |= F_CURSOR;
+            if (ui->show) {
+                int u, v;
+                for(u = 0; u < 3; u++)
+                    for(v = 0; v < 3; v++)
+                        if(ui->x == 2*c+u && ui->y == 2*r+v)
+                            flags |= CONTAINS_CURSOR(BIT(3*u+v));
+            }
 
             /* border errors */
             for (dir = 0; dir < 4; ++dir) {
@@ -1248,6 +1379,9 @@ static void game_redraw(drawing *dr, game_drawstate *ds,
             draw_tile(dr, ds, r, c, ds->grid[i], clue);
         }
 
+    if (ui->show)
+        draw_cursor(dr, ds, ui->x, ui->y, ui->legacy_cursor);
+
     dsf_free(black_border_dsf);
     dsf_free(yellow_border_dsf);
 }
@@ -1375,7 +1509,7 @@ const struct game thegame = {
     free_game,
     true, solve_game,
     true, game_can_format_as_text_now, game_text_format,
-    NULL, NULL, /* get_prefs, set_prefs */
+    get_prefs, set_prefs, /* get_prefs, set_prefs */
     new_ui,
     free_ui,
     NULL, /* encode_ui */
diff --git a/apps/plugins/puzzles/src/puzzles.but b/apps/plugins/puzzles/src/puzzles.but
index fb94155eed..fa9384252e 100644
--- a/apps/plugins/puzzles/src/puzzles.but
+++ b/apps/plugins/puzzles/src/puzzles.but
@@ -3519,10 +3519,15 @@ Palisade was contributed to this collection by Jonas K\u00F6{oe}lker.
 \H{palisade-controls} \I{controls, for Palisade}Palisade controls
 
 Left-click to place an edge.  Right-click to indicate \q{no edge}.
-Alternatively, the arrow keys will move a keyboard cursor.  Holding
-Control while pressing an arrow key will place an edge.  Press
-Shift-arrowkey to switch off an edge.  Repeat an action to perform
-its inverse.
+
+Alternatively, the arrow keys will move a keyboard cursor. Depending
+on the \q{Cursor mode} preference (see \k{palisade-prefs}), the cursor
+will either navigate among the grid squares, or along their
+borders. In \q{Full-grid} mode, hold Control while pressing an arrow
+key to place an edge, and press Shift-arrowkey to switch off an
+edge. In \q{Half-grid} mode, press Enter to place an edge, and Space
+to switch off an edge. In either mode, you can repeat an action to
+perform its inverse.
 
 (All the actions described in \k{common-actions} are also available.)
 
@@ -3539,6 +3544,13 @@ These parameters are available from the \q{Custom...} option on the
 
 \dd The size of the regions into which the grid must be subdivided.
 
+\H{palisade-prefs} \I{preferences, for Palisade}Palisade user preferences
+
+On platforms that support user preferences, the \q{Preferences} option
+on the \q{Game} menu will let you configure the behavior of the cursor
+keys to either navigate among full grid squares, or along the borders
+of the grid squares.
+
 \C{mosaic} \i{Mosaic}
 
 \cfg{winhelp-topic}{games.mosaic}
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));
diff --git a/apps/plugins/puzzles/src/unequal.c b/apps/plugins/puzzles/src/unequal.c
index ab32e4ab79..008dab3a0b 100644
--- a/apps/plugins/puzzles/src/unequal.c
+++ b/apps/plugins/puzzles/src/unequal.c
@@ -1844,18 +1844,18 @@ static void draw_gt(drawing *dr, int ox, int oy,
 {
     int coords[12];
     int xdx = (dx1+dx2 ? 0 : 1), xdy = (dx1+dx2 ? 1 : 0);
-    coords[0] = ox + xdx;
-    coords[1] = oy + xdy;
-    coords[2] = ox + xdx + dx1;
-    coords[3] = oy + xdy + dy1;
-    coords[4] = ox + xdx + dx1 + dx2;
-    coords[5] = oy + xdy + dy1 + dy2;
-    coords[6] = ox - xdx + dx1 + dx2;
-    coords[7] = oy - xdy + dy1 + dy2;
-    coords[8] = ox - xdx + dx1;
-    coords[9] = oy - xdy + dy1;
-    coords[10] = ox - xdx;
-    coords[11] = oy - xdy;
+    coords[0] = ox + xdx + dx1;
+    coords[1] = oy + xdy + dy1;
+    coords[2] = ox + xdx + dx1 + dx2;
+    coords[3] = oy + xdy + dy1 + dy2;
+    coords[4] = ox - xdx + dx1 + dx2;
+    coords[5] = oy - xdy + dy1 + dy2;
+    coords[6] = ox - xdx + dx1;
+    coords[7] = oy - xdy + dy1;
+    coords[8] = ox - xdx;
+    coords[9] = oy - xdy;
+    coords[10] = ox + xdx;
+    coords[11] = oy + xdy;
     draw_polygon(dr, coords, 6, col, col);
 }