added movement-based engine snapshot mode to step-based mode

[rocksndiamonds.git] / src / game.c

diff --git a/src/game.c b/src/game.c
index c0153bdf452c0cdc55ada397285bbd9bd3681481..02861925e981cb2510b22c683f206a60cdef1afa 100644 (file)
--- a/src/game.c
+++ b/src/game.c
@@ -3035,6 +3035,12 @@ static void InitGameEngine()
   game.scroll_delay_value =
     MIN(MAX(MIN_SCROLL_DELAY, game.scroll_delay_value), MAX_SCROLL_DELAY);
 
+  /* ---------- initialize game engine snapshots ---------------------------- */
+  for (i = 0; i < MAX_PLAYERS; i++)
+    game.snapshot.last_action[i] = 0;
+  game.snapshot.changed_action = FALSE;
+  game.snapshot.mode = SNAPSHOT_MODE_MOVE;
+
   FreeEngineSnapshotList();
 }
 
@@ -10681,15 +10687,13 @@ static void CheckSaveEngineSnapshot(struct PlayerInfo *player)
   static boolean player_was_snapping = FALSE;
   static boolean player_was_dropping = FALSE;
 
-  if (!tape.recording)
-    return;
-
   if ((!player->is_moving  && player_was_moving) ||
       (player->MovPos == 0 && player_was_moving) ||
       (player->is_snapping && !player_was_snapping) ||
       (player->is_dropping && !player_was_dropping))
   {
-    SaveEngineSnapshotToList();
+    if (!SaveEngineSnapshotToList())
+      return;
 
     player_was_moving = FALSE;
     player_was_snapping = TRUE;
@@ -10958,6 +10962,23 @@ void GameActions()
   byte tape_action[MAX_PLAYERS];
   int i;
 
+  for (i = 0; i < MAX_PLAYERS; i++)
+  {
+    struct PlayerInfo *player = &stored_player[i];
+
+    // allow engine snapshot if movement attempt was stopped
+    if ((game.snapshot.last_action[i] & KEY_MOTION) != 0 &&
+       (player->action & KEY_MOTION) == 0)
+      game.snapshot.changed_action = TRUE;
+
+    // allow engine snapshot in case of snapping/dropping attempt
+    if ((game.snapshot.last_action[i] & KEY_BUTTON) == 0 &&
+       (player->action & KEY_BUTTON) != 0)
+      game.snapshot.changed_action = TRUE;
+
+    game.snapshot.last_action[i] = player->action;
+  }
+
   /* detect endless loops, caused by custom element programming */
   if (recursion_loop_detected && recursion_loop_depth == 0)
   {
@@ -14613,10 +14634,6 @@ ListNode *SaveEngineSnapshotBuffers()
 {
   ListNode *buffers = NULL;
 
-  /* do not save snapshots from editor */
-  if (level_editor_test_game)
-    return NULL;
-
   /* copy some special values to a structure better suited for the snapshot */
 
   if (level.game_engine_type == GAME_ENGINE_TYPE_RND)
@@ -14731,12 +14748,25 @@ void SaveEngineSnapshotSingle()
   SaveSnapshotSingle(buffers);
 }
 
-void SaveEngineSnapshotToList()
+boolean SaveEngineSnapshotToList()
 {
+  boolean save_snapshot =
+    (FrameCounter == 0 ||
+     (game.snapshot.mode == SNAPSHOT_MODE_STEP) ||
+     (game.snapshot.mode == SNAPSHOT_MODE_MOVE &&
+      game.snapshot.changed_action));
+
+  game.snapshot.changed_action = FALSE;
+
+  if (!save_snapshot)
+    return FALSE;
+
   ListNode *buffers = SaveEngineSnapshotBuffers();
 
   /* finally save all snapshot buffers to snapshot list */
   SaveSnapshotToList(buffers);
+
+  return TRUE;
 }
 
 void LoadEngineSnapshotValues()
@@ -14758,16 +14788,16 @@ void LoadEngineSnapshotSingle()
   LoadEngineSnapshotValues();
 }
 
-void LoadEngineSnapshot_Undo()
+void LoadEngineSnapshot_Undo(int steps)
 {
-  LoadSnapshotFromList_Older();
+  LoadSnapshotFromList_Older(steps);
 
   LoadEngineSnapshotValues();
 }
 
-void LoadEngineSnapshot_Redo()
+void LoadEngineSnapshot_Redo(int steps)
 {
-  LoadSnapshotFromList_Newer();
+  LoadSnapshotFromList_Newer(steps);
 
   LoadEngineSnapshotValues();
 }
@@ -14978,34 +15008,36 @@ void GameUndoRedoExt()
   RedrawPlayfield();
   UpdateAndDisplayGameControlValues();
 
+  DrawCompleteVideoDisplay();
   DrawVideoDisplay(VIDEO_STATE_TIME_ON, TapeTime);
   DrawVideoDisplay(VIDEO_STATE_FRAME_ON, FrameCounter);
 
   BackToFront();
 }
 
-void GameUndo()
+void GameUndo(int steps)
 {
   if (!CheckEngineSnapshot())
     return;
 
-  LoadEngineSnapshot_Undo();
+  LoadEngineSnapshot_Undo(steps);
 
   GameUndoRedoExt();
 }
 
-void GameRedo()
+void GameRedo(int steps)
 {
   if (!CheckEngineSnapshot())
     return;
 
-  LoadEngineSnapshot_Redo();
+  LoadEngineSnapshot_Redo(steps);
 
   GameUndoRedoExt();
 }
 
-static void HandleGameButtonsExt(int id)
+static void HandleGameButtonsExt(int id, int button)
 {
+  int steps = BUTTON_STEPSIZE(button);
   boolean handle_game_buttons =
     (game_status == GAME_MODE_PLAYING ||
      (game_status == GAME_MODE_MAIN && tape.show_game_buttons));
@@ -15060,11 +15092,11 @@ static void HandleGameButtonsExt(int id)
       break;
 
     case GAME_CTRL_ID_UNDO:
-      GameUndo();
+      GameUndo(steps);
       break;
 
     case GAME_CTRL_ID_REDO:
-      GameRedo();
+      GameRedo(steps);
       break;
 
     case GAME_CTRL_ID_SAVE:
@@ -15121,7 +15153,7 @@ static void HandleGameButtonsExt(int id)
 
 static void HandleGameButtons(struct GadgetInfo *gi)
 {
-  HandleGameButtonsExt(gi->custom_id);
+  HandleGameButtonsExt(gi->custom_id, gi->event.button);
 }
 
 void HandleSoundButtonKeys(Key key)