fixed bug in single button handling causing broken tapes (EM engine)

[rocksndiamonds.git] / src / game_em / input.c

diff --git a/src/game_em/input.c b/src/game_em/input.c
index 470975188b35f997624eb5f18519e240a5b45c7a..b8e2e663b1f5f96df79356adc6dea8b8220ba33e 100644 (file)
--- a/src/game_em/input.c
+++ b/src/game_em/input.c
@@ -83,7 +83,7 @@ void GameActions_EM(byte action[MAX_PLAYERS], boolean warp_mode)
   for (i = 0; i < MAX_PLAYERS; i++)
     readjoy(action[i], &ply[i]);
 
-  UpdateEngineValues(screen_x / TILEX, screen_y / TILEY);
+  UpdateEngineValues(screen_x / TILEX, screen_y / TILEY, ply[0].x, ply[0].y);
 
   if (frame == 7)
   {
@@ -110,9 +110,6 @@ void GameActions_EM(byte action[MAX_PLAYERS], boolean warp_mode)
                         game_em.any_player_snapping, any_player_dropping);
 
   RedrawPlayfield_EM(FALSE);
-
-  BlitScreenToBitmap_EM(backbuffer);
-  BackToFront_EM();
 }
 
 /* read input device for players */
@@ -122,6 +119,9 @@ void readjoy(byte action, struct PLAYER *ply)
   int north = 0, east = 0, south = 0, west = 0;
   int snap = 0, drop = 0;
 
+  if (game_em.use_single_button && action & (JOY_BUTTON_1 | JOY_BUTTON_2))
+    action |= JOY_BUTTON_1 | JOY_BUTTON_2;
+
   if (action & JOY_LEFT)
     west = 1;
 
@@ -140,16 +140,27 @@ void readjoy(byte action, struct PLAYER *ply)
   if (action & JOY_BUTTON_2)
     drop = 1;
 
-  ply->joy_snap = snap;
+  /* always update drop action */
   ply->joy_drop = drop;
 
-  if (ply->joy_stick || (north | east | south | west))
+  if (ply->joy_stick || (north | east | south | west)) /* (no "| snap"!) */
   {
     ply->joy_n = north;
     ply->joy_e = east;
     ply->joy_s = south;
     ply->joy_w = west;
+
+    /* when storing last action, only update snap action with direction */
+    /* (prevents clearing direction if snapping stopped before frame 7) */
+    ply->joy_snap = snap;
   }
+
+  /* if no direction was stored before, allow setting snap to current state */
+  if (!ply->joy_n &&
+      !ply->joy_e &&
+      !ply->joy_s &&
+      !ply->joy_w)
+    ply->joy_snap = snap;
 }
 
 void SaveEngineSnapshotValues_EM()