added mapping for native game elements for Boulder Dash game engine
[rocksndiamonds.git] / src / tools.c
index e66df891e48db48c8d20558b7146523bf23f281a..622fa488166603440dd57e3a8afbbcc19a054a2b 100644 (file)
@@ -175,6 +175,7 @@ static struct XY xy_topdown[] =
 
 
 // forward declaration for internal use
+static void MapToolButtons(unsigned int);
 static void UnmapToolButtons(void);
 static void HandleToolButtons(struct GadgetInfo *);
 static int el_act_dir2crm(int, int, int);
@@ -634,6 +635,10 @@ void DrawMaskedBorderToTarget(int draw_target)
       gfx.masked_border_bitmap_ptr = gfx.fade_bitmap_target;
     }
 
+    // always use global border for PLAYING when restarting the game
+    if (global.border_status == GAME_MODE_PSEUDO_RESTARTING)
+      global.border_status = GAME_MODE_PLAYING;
+
     DrawMaskedBorderExt(REDRAW_ALL, draw_target);
 
     global.border_status = last_border_status;
@@ -641,9 +646,11 @@ void DrawMaskedBorderToTarget(int draw_target)
   }
 }
 
-void DrawTileCursor(int draw_target)
+void DrawTileCursor(int draw_target, int drawing_stage)
 {
-  DrawTileCursor_MM(draw_target, game_status == GAME_MODE_PLAYING);
+  int tile_cursor_active = (game_status == GAME_MODE_PLAYING);
+
+  DrawTileCursor_MM(draw_target, drawing_stage, tile_cursor_active);
 }
 
 void BlitScreenToBitmapExt_RND(Bitmap *target_bitmap, int fx, int fy)
@@ -976,6 +983,10 @@ static void SetScreenStates_BeforeFadingOut(void)
 static void SetScreenStates_AfterFadingOut(void)
 {
   global.border_status = game_status;
+
+  // always use global border for PLAYING when restarting the game
+  if (global.border_status == GAME_MODE_PSEUDO_RESTARTING)
+    global.border_status = GAME_MODE_PLAYING;
 }
 
 void FadeIn(int fade_mask)
@@ -1506,6 +1517,11 @@ void SetRandomAnimationValue(int x, int y)
   gfx.anim_random_frame = GfxRandom[x][y];
 }
 
+void SetAnimationFirstLevel(int first_level)
+{
+  gfx.anim_first_level = first_level;
+}
+
 int getGraphicAnimationFrame(int graphic, int sync_frame)
 {
   // animation synchronized with global frame counter, not move position
@@ -3011,8 +3027,7 @@ void ShowEnvelope(int envelope_nr)
 static void PrepareEnvelopeRequestToScreen(Bitmap *bitmap, int sx, int sy,
                                           int xsize, int ysize)
 {
-  if (!global.use_envelope_request ||
-      request.sort_priority <= 0)
+  if (!global.use_envelope_request)
     return;
 
   if (request.bitmap == NULL ||
@@ -3032,9 +3047,22 @@ static void PrepareEnvelopeRequestToScreen(Bitmap *bitmap, int sx, int sy,
 
   BlitBitmap(bitmap, request.bitmap, sx, sy, xsize, ysize, 0, 0);
 
+  // create masked surface for request bitmap, if needed
+  if (graphic_info[IMG_BACKGROUND_REQUEST].draw_masked)
+  {
+    SDL_Surface *surface        = request.bitmap->surface;
+    SDL_Surface *surface_masked = request.bitmap->surface_masked;
+
+    SDLBlitSurface(surface, surface_masked, 0, 0, xsize, ysize, 0, 0);
+    SDL_SetColorKey(surface_masked, SET_TRANSPARENT_PIXEL,
+                   SDL_MapRGB(surface_masked->format, 0x00, 0x00, 0x00));
+  }
+
   SDLFreeBitmapTextures(request.bitmap);
   SDLCreateBitmapTextures(request.bitmap);
 
+  ResetBitmapAlpha(request.bitmap);
+
   // set envelope request run-time values
   request.sx = sx;
   request.sy = sy;
@@ -3045,12 +3073,19 @@ static void PrepareEnvelopeRequestToScreen(Bitmap *bitmap, int sx, int sy,
 void DrawEnvelopeRequestToScreen(int drawing_target)
 {
   if (global.use_envelope_request &&
-      game.request_active_or_moving &&
-      request.sort_priority > 0 &&
+      game.request_active &&
       drawing_target == DRAW_TO_SCREEN)
   {
-    BlitToScreen(request.bitmap, 0, 0, request.xsize, request.ysize,
-                request.sx, request.sy);
+    struct GraphicInfo *g = &graphic_info[IMG_BACKGROUND_REQUEST];
+
+    SetBitmapAlphaNextBlit(request.bitmap, g->alpha);
+
+    if (g->draw_masked)
+      BlitToScreenMasked(request.bitmap, 0, 0, request.xsize, request.ysize,
+                        request.sx, request.sy);
+    else
+      BlitToScreen(request.bitmap, 0, 0, request.xsize, request.ysize,
+                  request.sx, request.sy);
   }
 }
 
@@ -3121,7 +3156,7 @@ static void setRequestPosition(int *x, int *y, boolean add_border_size)
   setRequestPositionExt(x, y, request.width, request.height, add_border_size);
 }
 
-static void DrawEnvelopeRequest(char *text)
+static void DrawEnvelopeRequestText(int sx, int sy, char *text)
 {
   char *text_final = text;
   char *text_door_style = NULL;
@@ -3139,15 +3174,11 @@ static void DrawEnvelopeRequest(char *text)
   int line_length = max_text_width  / font_width;
   int max_lines   = max_text_height / line_height;
   int text_width = line_length * font_width;
-  int width = request.width;
-  int height = request.height;
-  int tile_size = MAX(request.step_offset, 1);
-  int x_steps = width  / tile_size;
-  int y_steps = height / tile_size;
   int sx_offset = border_size;
   int sy_offset = border_size;
-  int sx, sy;
-  int i, x, y;
+
+  // force DOOR font inside door area
+  SetFontStatus(GAME_MODE_PSEUDO_DOOR);
 
   if (request.centered)
     sx_offset = (request.width - text_width) / 2;
@@ -3156,6 +3187,13 @@ static void DrawEnvelopeRequest(char *text)
   {
     char *src_text_ptr, *dst_text_ptr;
 
+    if (maxWordLengthInRequestString(text) > line_length)
+    {
+      font_nr = FONT_REQUEST_NARROW;
+      font_width = getFontWidth(font_nr);
+      line_length = max_text_width  / font_width;
+    }
+
     text_door_style = checked_malloc(2 * strlen(text) + 1);
 
     src_text_ptr = text;
@@ -3179,9 +3217,34 @@ static void DrawEnvelopeRequest(char *text)
     text_final = text_door_style;
   }
 
+  DrawTextBuffer(sx + sx_offset, sy + sy_offset, text_final, font_nr,
+                line_length, -1, max_lines, line_spacing, mask_mode,
+                request.autowrap, request.centered, FALSE);
+
+  if (text_door_style)
+    free(text_door_style);
+
+  ResetFontStatus();
+}
+
+static void DrawEnvelopeRequest(char *text, unsigned int req_state)
+{
+  DrawBuffer *drawto_last = drawto;
+  int graphic = IMG_BACKGROUND_REQUEST;
+  int width = request.width;
+  int height = request.height;
+  int tile_size = MAX(request.step_offset, 1);
+  int x_steps = width  / tile_size;
+  int y_steps = height / tile_size;
+  int sx, sy;
+  int x, y;
+
   setRequestPosition(&sx, &sy, FALSE);
 
-  ClearRectangle(backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE);
+  // draw complete envelope request to temporary bitmap
+  drawto = bitmap_db_store_1;
+
+  ClearRectangle(drawto, sx, sy, width, height);
 
   for (y = 0; y < y_steps; y++)
     for (x = 0; x < x_steps; x++)
@@ -3189,37 +3252,27 @@ static void DrawEnvelopeRequest(char *text)
                                  x, y, x_steps, y_steps,
                                  tile_size, tile_size);
 
-  // force DOOR font inside door area
-  SetFontStatus(GAME_MODE_PSEUDO_DOOR);
-
-  DrawTextBuffer(sx + sx_offset, sy + sy_offset, text_final, font_nr,
-                line_length, -1, max_lines, line_spacing, mask_mode,
-                request.autowrap, request.centered, FALSE);
-
-  ResetFontStatus();
-
-  for (i = 0; i < NUM_TOOL_BUTTONS; i++)
-    RedrawGadget(tool_gadget[i]);
+  // write text for request
+  DrawEnvelopeRequestText(sx, sy, text);
 
-  // store readily prepared envelope request for later use when animating
-  BlitBitmap(backbuffer, bitmap_db_store_2, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
+  MapToolButtons(req_state);
 
-  PrepareEnvelopeRequestToScreen(bitmap_db_store_2, sx, sy, width, height);
+  // restore pointer to drawing buffer
+  drawto = drawto_last;
 
-  if (text_door_style)
-    free(text_door_style);
+  // prepare complete envelope request from temporary bitmap
+  PrepareEnvelopeRequestToScreen(bitmap_db_store_1, sx, sy, width, height);
 }
 
 static void AnimateEnvelopeRequest(int anim_mode, int action)
 {
-  int graphic = IMG_BACKGROUND_REQUEST;
-  boolean draw_masked = graphic_info[graphic].draw_masked;
+  boolean game_ended = (game_status == GAME_MODE_PLAYING && checkGameEnded());
   int delay_value_normal = request.step_delay;
   int delay_value_fast = delay_value_normal / 2;
   boolean ffwd_delay = (tape.playing && tape.fast_forward);
   boolean no_delay = (tape.warp_forward);
   int delay_value = (ffwd_delay ? delay_value_fast : delay_value_normal);
-  int anim_delay_value = MAX(1, (no_delay ? 0 : delay_value + 500 * 0) / 2);
+  int anim_delay_value = MAX(1, (no_delay ? 0 : delay_value) / 2);
   DelayCounter anim_delay = { anim_delay_value };
 
   int tile_size = MAX(request.step_offset, 1);
@@ -3262,11 +3315,12 @@ static void AnimateEnvelopeRequest(int anim_mode, int action)
     int dst_x, dst_y;
     int xx, yy;
 
+    if (game_ended)
+      HandleGameActions();
+
     setRequestPosition(&src_x, &src_y, FALSE);
     setRequestPositionExt(&dst_x, &dst_y, width, height, FALSE);
 
-    BlitBitmap(bitmap_db_store_1, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
-
     for (yy = 0; yy < 2; yy++)
     {
       for (xx = 0; xx < 2; xx++)
@@ -3278,16 +3332,15 @@ static void AnimateEnvelopeRequest(int anim_mode, int action)
        int xx_size = (xx ? tile_size : xsize_size_left);
        int yy_size = (yy ? tile_size : ysize_size_top);
 
-       if (draw_masked)
-         BlitBitmapMasked(bitmap_db_store_2, backbuffer,
-                          src_xx, src_yy, xx_size, yy_size, dst_xx, dst_yy);
-       else
-         BlitBitmap(bitmap_db_store_2, backbuffer,
-                    src_xx, src_yy, xx_size, yy_size, dst_xx, dst_yy);
+       // draw partial (animated) envelope request to temporary bitmap
+       BlitBitmap(bitmap_db_store_1, bitmap_db_store_2,
+                  src_xx, src_yy, xx_size, yy_size, dst_xx, dst_yy);
       }
     }
 
-    PrepareEnvelopeRequestToScreen(backbuffer, dst_x, dst_y, width, height);
+    // prepare partial (animated) envelope request from temporary bitmap
+    PrepareEnvelopeRequestToScreen(bitmap_db_store_2, dst_x, dst_y,
+                                  width, height);
 
     redraw_mask |= REDRAW_FIELD;
 
@@ -3310,40 +3363,6 @@ static void ShowEnvelopeRequest(char *text, unsigned int req_state, int action)
   int main_anim_mode = (anim_mode == ANIM_NONE ? ANIM_VERTICAL|ANIM_HORIZONTAL:
                        anim_mode == ANIM_DEFAULT ? ANIM_VERTICAL : anim_mode);
 
-  if (game_status == GAME_MODE_PLAYING)
-    BlitScreenToBitmap(backbuffer);
-
-  SetDrawtoField(DRAW_TO_BACKBUFFER);
-
-  // SetDrawBackgroundMask(REDRAW_NONE);
-
-  if (action == ACTION_OPENING)
-  {
-    BlitBitmap(backbuffer, bitmap_db_store_1, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
-
-    if (req_state & REQ_ASK)
-    {
-      MapGadget(tool_gadget[TOOL_CTRL_ID_YES]);
-      MapGadget(tool_gadget[TOOL_CTRL_ID_NO]);
-      MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_YES]);
-      MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_NO]);
-    }
-    else if (req_state & REQ_CONFIRM)
-    {
-      MapGadget(tool_gadget[TOOL_CTRL_ID_CONFIRM]);
-      MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_CONFIRM]);
-    }
-    else if (req_state & REQ_PLAYER)
-    {
-      MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_1]);
-      MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_2]);
-      MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_3]);
-      MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_4]);
-    }
-
-    DrawEnvelopeRequest(text);
-  }
-
   game.envelope_active = TRUE; // needed for RedrawPlayfield() events
 
   if (action == ACTION_OPENING)
@@ -3367,20 +3386,6 @@ static void ShowEnvelopeRequest(char *text, unsigned int req_state, int action)
   }
 
   game.envelope_active = FALSE;
-
-  if (action == ACTION_CLOSING)
-    BlitBitmap(bitmap_db_store_1, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
-
-  // SetDrawBackgroundMask(last_draw_background_mask);
-
-  redraw_mask |= REDRAW_FIELD;
-
-  BackToFront();
-
-  if (action == ACTION_CLOSING &&
-      game_status == GAME_MODE_PLAYING &&
-      level.game_engine_type == GAME_ENGINE_TYPE_RND)
-    SetDrawtoField(DRAW_TO_FIELDBUFFER);
 }
 
 static void DrawPreviewElement(int dst_x, int dst_y, int element, int tilesize)
@@ -4498,26 +4503,15 @@ void WaitForEventToContinue(void)
   }
 }
 
-#define MAX_REQUEST_LINES              13
-#define MAX_REQUEST_LINE_FONT1_LEN     7
-#define MAX_REQUEST_LINE_FONT2_LEN     10
-
 static int RequestHandleEvents(unsigned int req_state, int draw_buffer_game)
 {
-  boolean game_just_ended = (game_status == GAME_MODE_PLAYING &&
-                            checkGameEnded());
+  boolean game_ended = (game_status == GAME_MODE_PLAYING && checkGameEnded());
   int draw_buffer_last = GetDrawtoField();
   int width  = request.width;
   int height = request.height;
   int sx, sy;
   int result;
 
-  // when showing request dialog after game ended, deactivate game panel
-  if (game_just_ended)
-    game.panel.active = FALSE;
-
-  game.request_active = TRUE;
-
   setRequestPosition(&sx, &sy, FALSE);
 
   button_status = MB_RELEASED;
@@ -4527,21 +4521,13 @@ static int RequestHandleEvents(unsigned int req_state, int draw_buffer_game)
 
   while (result < 0)
   {
-    boolean event_handled = FALSE;
-
-    if (game_just_ended)
+    if (game_ended)
     {
       SetDrawtoField(draw_buffer_game);
 
       HandleGameActions();
 
       SetDrawtoField(DRAW_TO_BACKBUFFER);
-
-      if (global.use_envelope_request)
-      {
-       // copy current state of request area to middle of playfield area
-       BlitBitmap(bitmap_db_store_2, drawto, sx, sy, width, height, sx, sy);
-      }
     }
 
     if (PendingEvent())
@@ -4550,14 +4536,13 @@ static int RequestHandleEvents(unsigned int req_state, int draw_buffer_game)
 
       while (NextValidEvent(&event))
       {
-       event_handled = TRUE;
-
        switch (event.type)
        {
          case EVENT_BUTTONPRESS:
          case EVENT_BUTTONRELEASE:
          case EVENT_MOTIONNOTIFY:
          {
+           DrawBuffer *drawto_last = drawto;
            int mx, my;
 
            if (event.type == EVENT_MOTIONNOTIFY)
@@ -4580,9 +4565,25 @@ static int RequestHandleEvents(unsigned int req_state, int draw_buffer_game)
                button_status = MB_RELEASED;
            }
 
+           if (global.use_envelope_request)
+           {
+             // draw changed button states to temporary bitmap
+             drawto = bitmap_db_store_1;
+           }
+
            // this sets 'request_gadget_id'
            HandleGadgets(mx, my, button_status);
 
+           if (global.use_envelope_request)
+           {
+             // restore pointer to drawing buffer
+             drawto = drawto_last;
+
+             // prepare complete envelope request from temporary bitmap
+             PrepareEnvelopeRequestToScreen(bitmap_db_store_1, sx, sy,
+                                            width, height);
+           }
+
            switch (request_gadget_id)
            {
              case TOOL_CTRL_ID_YES:
@@ -4612,11 +4613,12 @@ static int RequestHandleEvents(unsigned int req_state, int draw_buffer_game)
                break;
 
              default:
-               // only check clickable animations if no request gadget clicked
-               HandleGlobalAnimClicks(mx, my, button_status, FALSE);
                break;
            }
 
+           // only needed to handle clickable pointer animations here
+           HandleGlobalAnimClicks(mx, my, button_status, FALSE);
+
            break;
          }
 
@@ -4806,45 +4808,21 @@ static int RequestHandleEvents(unsigned int req_state, int draw_buffer_game)
       }
     }
 
-    if (event_handled)
-    {
-      if (game_just_ended)
-      {
-       if (global.use_envelope_request)
-       {
-         // copy back current state of pressed buttons inside request area
-         BlitBitmap(drawto, bitmap_db_store_2, sx, sy, width, height, sx, sy);
-       }
-      }
-
-      PrepareEnvelopeRequestToScreen(drawto, sx, sy, width, height);
-    }
-
     BackToFront();
   }
 
   SetDrawtoField(draw_buffer_last);
 
-  game.request_active = FALSE;
-
   return result;
 }
 
-static boolean RequestDoor(char *text, unsigned int req_state)
+static void DoRequestBefore(void)
 {
-  int draw_buffer_last = GetDrawtoField();
-  unsigned int old_door_state;
-  int max_request_line_len = MAX_REQUEST_LINE_FONT1_LEN;
-  int font_nr = FONT_TEXT_2;
-  char *text_ptr;
-  int result;
-  int ty;
+  boolean game_ended = (game_status == GAME_MODE_PLAYING && checkGameEnded());
 
-  if (maxWordLengthInRequestString(text) > MAX_REQUEST_LINE_FONT1_LEN)
-  {
-    max_request_line_len = MAX_REQUEST_LINE_FONT2_LEN;
-    font_nr = FONT_TEXT_1;
-  }
+  // when showing request dialog after game ended, deactivate game panel
+  if (game_ended)
+    game.panel.active = FALSE;
 
   if (game_status == GAME_MODE_PLAYING)
     BlitScreenToBitmap(backbuffer);
@@ -4858,41 +4836,89 @@ static boolean RequestDoor(char *text, unsigned int req_state)
   // pause network game while waiting for request to answer
   if (network.enabled &&
       game_status == GAME_MODE_PLAYING &&
-      !game.all_players_gone &&
-      req_state & REQUEST_WAIT_FOR_INPUT)
+      !game.all_players_gone)
     SendToServer_PausePlaying();
 
-  old_door_state = GetDoorState();
-
   // simulate releasing mouse button over last gadget, if still pressed
   if (button_status)
     HandleGadgets(-1, -1, 0);
 
   UnmapAllGadgets();
+}
 
-  // draw released gadget before proceeding
-  // BackToFront();
+static void DoRequestAfter(void)
+{
+  RemapAllGadgets();
 
-  if (old_door_state & DOOR_OPEN_1)
+  if (game_status == GAME_MODE_PLAYING)
   {
-    CloseDoor(DOOR_CLOSE_1);
+    SetPanelBackground();
+    SetDrawBackgroundMask(REDRAW_DOOR_1);
+  }
+  else
+  {
+    SetDrawBackgroundMask(REDRAW_FIELD);
+  }
 
-    // save old door content
-    BlitBitmap(bitmap_db_door_1, bitmap_db_door_1,
-              0 * DXSIZE, 0, DXSIZE, DYSIZE, 1 * DXSIZE, 0);
+  // continue network game after request
+  if (network.enabled &&
+      game_status == GAME_MODE_PLAYING &&
+      !game.all_players_gone)
+    SendToServer_ContinuePlaying();
+
+  // restore deactivated drawing when quick-loading level tape recording
+  if (tape.playing && tape.deactivate_display)
+    TapeDeactivateDisplayOn();
+}
+
+static void setRequestDoorTextProperties(char *text,
+                                        int text_spacing,
+                                        int line_spacing,
+                                        int *set_font_nr,
+                                        int *set_max_lines,
+                                        int *set_max_line_length)
+{
+  struct RectWithBorder *vp_door_1 = &viewport.door_1[game_status];
+  struct TextPosInfo *pos = &request.button.confirm;
+  int button_ypos = pos->y;
+  int font_nr = FONT_TEXT_2;
+  int font_width = getFontWidth(font_nr);
+  int font_height = getFontHeight(font_nr);
+  int line_height = font_height + line_spacing;
+  int max_text_width  = vp_door_1->width;
+  int max_text_height = button_ypos - 2 * text_spacing;
+  int max_line_length = max_text_width  / font_width;
+  int max_lines       = max_text_height / line_height;
+
+  if (maxWordLengthInRequestString(text) > max_line_length)
+  {
+    font_nr = FONT_TEXT_1;
+    font_width = getFontWidth(font_nr);
+    max_line_length = max_text_width  / font_width;
   }
 
-  SetDoorBackgroundImage(IMG_BACKGROUND_DOOR);
-  SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
+  *set_font_nr = font_nr;
+  *set_max_lines = max_lines;
+  *set_max_line_length = max_line_length;
+}
 
-  // clear door drawing field
-  DrawBackground(DX, DY, DXSIZE, DYSIZE);
+static void DrawRequestDoorText(char *text)
+{
+  char *text_ptr = text;
+  int text_spacing = 8;
+  int line_spacing = 2;
+  int max_request_lines;
+  int max_request_line_len;
+  int font_nr;
+  int ty;
 
   // force DOOR font inside door area
   SetFontStatus(GAME_MODE_PSEUDO_DOOR);
 
-  // write text for request
-  for (text_ptr = text, ty = 0; ty < MAX_REQUEST_LINES; ty++)
+  setRequestDoorTextProperties(text, text_spacing, line_spacing, &font_nr,
+                              &max_request_lines, &max_request_line_len);
+
+  for (text_ptr = text, ty = 0; ty < max_request_lines; ty++)
   {
     char text_line[max_request_line_len + 1];
     int tx, tl, tc = 0;
@@ -4903,7 +4929,6 @@ static boolean RequestDoor(char *text, unsigned int req_state)
     for (tl = 0, tx = 0; tx < max_request_line_len; tl++, tx++)
     {
       tc = *(text_ptr + tx);
-      // if (!tc || tc == ' ')
       if (!tc || tc == ' ' || tc == '?' || tc == '!')
        break;
     }
@@ -4922,56 +4947,45 @@ static boolean RequestDoor(char *text, unsigned int req_state)
     text_line[tl] = 0;
 
     DrawText(DX + (DXSIZE - tl * getFontWidth(font_nr)) / 2,
-            DY + 8 + ty * (getFontHeight(font_nr) + 2),
+            DY + text_spacing + ty * (getFontHeight(font_nr) + line_spacing),
             text_line, font_nr);
 
     text_ptr += tl + (tc == ' ' ? 1 : 0);
-    // text_ptr += tl + (tc == ' ' || tc == '?' || tc == '!' ? 1 : 0);
   }
 
   ResetFontStatus();
+}
 
-  if (req_state & REQ_ASK)
-  {
-    MapGadget(tool_gadget[TOOL_CTRL_ID_YES]);
-    MapGadget(tool_gadget[TOOL_CTRL_ID_NO]);
-    MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_YES]);
-    MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_NO]);
-  }
-  else if (req_state & REQ_CONFIRM)
-  {
-    MapGadget(tool_gadget[TOOL_CTRL_ID_CONFIRM]);
-    MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_CONFIRM]);
-  }
-  else if (req_state & REQ_PLAYER)
+static int RequestDoor(char *text, unsigned int req_state)
+{
+  unsigned int old_door_state = GetDoorState();
+  int draw_buffer_last = GetDrawtoField();
+  int result;
+
+  if (old_door_state & DOOR_OPEN_1)
   {
-    MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_1]);
-    MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_2]);
-    MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_3]);
-    MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_4]);
+    CloseDoor(DOOR_CLOSE_1);
+
+    // save old door content
+    BlitBitmap(bitmap_db_door_1, bitmap_db_door_1,
+              0, 0, DXSIZE, DYSIZE, DXSIZE, 0);
   }
 
-  // copy request gadgets to door backbuffer
-  BlitBitmap(drawto, bitmap_db_door_1, DX, DY, DXSIZE, DYSIZE, 0, 0);
+  SetDoorBackgroundImage(IMG_BACKGROUND_DOOR);
+  SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
 
-  OpenDoor(DOOR_OPEN_1);
+  // clear door drawing field
+  DrawBackground(DX, DY, DXSIZE, DYSIZE);
 
-  if (!(req_state & REQUEST_WAIT_FOR_INPUT))
-  {
-    if (game_status == GAME_MODE_PLAYING)
-    {
-      SetPanelBackground();
-      SetDrawBackgroundMask(REDRAW_DOOR_1);
-    }
-    else
-    {
-      SetDrawBackgroundMask(REDRAW_FIELD);
-    }
+  // write text for request
+  DrawRequestDoorText(text);
 
-    return FALSE;
-  }
+  MapToolButtons(req_state);
 
-  SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
+  // copy request gadgets to door backbuffer
+  BlitBitmap(drawto, bitmap_db_door_1, DX, DY, DXSIZE, DYSIZE, 0, 0);
+
+  OpenDoor(DOOR_OPEN_1);
 
   // ---------- handle request buttons ----------
   result = RequestHandleEvents(req_state, draw_buffer_last);
@@ -4987,135 +5001,48 @@ static boolean RequestDoor(char *text, unsigned int req_state)
       OpenDoor(DOOR_OPEN_1 | DOOR_COPY_BACK);
   }
 
-  RemapAllGadgets();
-
-  if (game_status == GAME_MODE_PLAYING)
-  {
-    SetPanelBackground();
-    SetDrawBackgroundMask(REDRAW_DOOR_1);
-  }
-  else
-  {
-    SetDrawBackgroundMask(REDRAW_FIELD);
-  }
-
-  // continue network game after request
-  if (network.enabled &&
-      game_status == GAME_MODE_PLAYING &&
-      !game.all_players_gone &&
-      req_state & REQUEST_WAIT_FOR_INPUT)
-    SendToServer_ContinuePlaying();
-
-  // restore deactivated drawing when quick-loading level tape recording
-  if (tape.playing && tape.deactivate_display)
-    TapeDeactivateDisplayOn();
-
   return result;
 }
 
-static boolean RequestEnvelope(char *text, unsigned int req_state)
+static int RequestEnvelope(char *text, unsigned int req_state)
 {
   int draw_buffer_last = GetDrawtoField();
   int result;
 
-  if (game_status == GAME_MODE_PLAYING)
-    BlitScreenToBitmap(backbuffer);
+  DrawEnvelopeRequest(text, req_state);
+  ShowEnvelopeRequest(text, req_state, ACTION_OPENING);
 
-  // disable deactivated drawing when quick-loading level tape recording
-  if (tape.playing && tape.deactivate_display)
-    TapeDeactivateDisplayOff(TRUE);
+  // ---------- handle request buttons ----------
+  result = RequestHandleEvents(req_state, draw_buffer_last);
 
-  SetMouseCursor(CURSOR_DEFAULT);
-
-  // pause network game while waiting for request to answer
-  if (network.enabled &&
-      game_status == GAME_MODE_PLAYING &&
-      !game.all_players_gone &&
-      req_state & REQUEST_WAIT_FOR_INPUT)
-    SendToServer_PausePlaying();
-
-  // simulate releasing mouse button over last gadget, if still pressed
-  if (button_status)
-    HandleGadgets(-1, -1, 0);
-
-  UnmapAllGadgets();
-
-  // (replace with setting corresponding request background)
-  // SetDoorBackgroundImage(IMG_BACKGROUND_DOOR);
-  // SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
-
-  // clear door drawing field
-  // DrawBackground(DX, DY, DXSIZE, DYSIZE);
-
-  ShowEnvelopeRequest(text, req_state, ACTION_OPENING);
-
-  if (!(req_state & REQUEST_WAIT_FOR_INPUT))
-  {
-    if (game_status == GAME_MODE_PLAYING)
-    {
-      SetPanelBackground();
-      SetDrawBackgroundMask(REDRAW_DOOR_1);
-    }
-    else
-    {
-      SetDrawBackgroundMask(REDRAW_FIELD);
-    }
-
-    return FALSE;
-  }
-
-  SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
-
-  // ---------- handle request buttons ----------
-  result = RequestHandleEvents(req_state, draw_buffer_last);
-
-  UnmapToolButtons();
+  UnmapToolButtons();
 
   ShowEnvelopeRequest(text, req_state, ACTION_CLOSING);
 
-  RemapAllGadgets();
-
-  if (game_status == GAME_MODE_PLAYING)
-  {
-    SetPanelBackground();
-    SetDrawBackgroundMask(REDRAW_DOOR_1);
-  }
-  else
-  {
-    SetDrawBackgroundMask(REDRAW_FIELD);
-  }
-
-  // continue network game after request
-  if (network.enabled &&
-      game_status == GAME_MODE_PLAYING &&
-      !game.all_players_gone &&
-      req_state & REQUEST_WAIT_FOR_INPUT)
-    SendToServer_ContinuePlaying();
-
-  // restore deactivated drawing when quick-loading level tape recording
-  if (tape.playing && tape.deactivate_display)
-    TapeDeactivateDisplayOn();
-
   return result;
 }
 
-boolean Request(char *text, unsigned int req_state)
+int Request(char *text, unsigned int req_state)
 {
   boolean overlay_enabled = GetOverlayEnabled();
-  boolean result;
+  int result;
 
-  game.request_active_or_moving = TRUE;
+  game.request_active = TRUE;
 
   SetOverlayEnabled(FALSE);
 
+  DoRequestBefore();
+
   if (global.use_envelope_request)
     result = RequestEnvelope(text, req_state);
   else
     result = RequestDoor(text, req_state);
 
+  DoRequestAfter();
+
   SetOverlayEnabled(overlay_enabled);
 
-  game.request_active_or_moving = FALSE;
+  game.request_active = FALSE;
 
   return result;
 }
@@ -5419,6 +5346,7 @@ unsigned int MoveDoor(unsigned int door_state)
 
   if (door_state & DOOR_ACTION)
   {
+    boolean game_ended = (game_status == GAME_MODE_PLAYING && checkGameEnded());
     boolean door_panel_drawn[NUM_DOORS];
     boolean panel_has_doors[NUM_DOORS];
     boolean door_part_skip[MAX_DOOR_PARTS];
@@ -5685,6 +5613,9 @@ unsigned int MoveDoor(unsigned int door_state)
 
       if (!(door_state & DOOR_NO_DELAY))
       {
+       if (game_ended)
+         HandleGameActions();
+
        BackToFront();
 
        SkipUntilDelayReached(&door_delay, &k, last_frame);
@@ -5708,7 +5639,12 @@ unsigned int MoveDoor(unsigned int door_state)
        door_delay.value = door_2.post_delay;
 
       while (!DelayReached(&door_delay))
+      {
+       if (game_ended)
+         HandleGameActions();
+
        BackToFront();
+      }
     }
   }
 
@@ -5971,6 +5907,29 @@ void FreeToolButtons(void)
     FreeGadget(tool_gadget[i]);
 }
 
+static void MapToolButtons(unsigned int req_state)
+{
+  if (req_state & REQ_ASK)
+  {
+    MapGadget(tool_gadget[TOOL_CTRL_ID_YES]);
+    MapGadget(tool_gadget[TOOL_CTRL_ID_NO]);
+    MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_YES]);
+    MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_NO]);
+  }
+  else if (req_state & REQ_CONFIRM)
+  {
+    MapGadget(tool_gadget[TOOL_CTRL_ID_CONFIRM]);
+    MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_CONFIRM]);
+  }
+  else if (req_state & REQ_PLAYER)
+  {
+    MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_1]);
+    MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_2]);
+    MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_3]);
+    MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_4]);
+  }
+}
+
 static void UnmapToolButtons(void)
 {
   int i;
@@ -5984,6 +5943,1145 @@ static void HandleToolButtons(struct GadgetInfo *gi)
   request_gadget_id = gi->custom_id;
 }
 
+static struct Mapping_BD_to_RND_object
+{
+  int element_bd;
+  boolean is_rnd_to_bd_mapping;                // unique mapping BD <-> RND
+
+  int element_rnd;
+  int action;
+  int direction;
+}
+bd_object_mapping_list[] =
+{
+  // additional RND style elements mapped to BD style elements must be listed first
+
+  {
+    O_DIRT,                                    TRUE,
+    EL_SAND,                                   -1, -1
+  },
+  {
+    O_STONE,                                   TRUE,
+    EL_BD_ROCK,                                        -1, -1
+  },
+  {
+    O_BRICK,                                   TRUE,
+    EL_BD_WALL,                                        -1, -1
+  },
+  {
+    O_STEEL,                                   TRUE,
+    EL_STEELWALL,                              -1, -1
+  },
+  {
+    O_DIAMOND,                                 TRUE,
+    EL_BD_DIAMOND,                             -1, -1
+  },
+  {
+    O_INBOX,                                   TRUE,
+    EL_PLAYER_1,                               -1, -1
+  },
+  {
+    O_INBOX,                                   TRUE,
+    EL_PLAYER_2,                               -1, -1
+  },
+  {
+    O_INBOX,                                   TRUE,
+    EL_PLAYER_3,                               -1, -1
+  },
+  {
+    O_INBOX,                                   TRUE,
+    EL_PLAYER_4,                               -1, -1
+  },
+  {
+    O_PRE_OUTBOX,                              TRUE,
+    EL_EXIT_CLOSED,                            -1, -1
+  },
+
+  // BD style elements with their corresponding RND style elements
+
+  {
+    O_SPACE,                                   TRUE,
+    EL_EMPTY,                                  -1, -1
+  },
+  {
+    O_DIRT,                                    TRUE,
+    EL_BD_SAND,                                        -1, -1
+  },
+  {
+    O_DIRT_SLOPED_UP_RIGHT,                    TRUE,
+    EL_BD_SAND_SLOPED_UP_RIGHT,                        -1, -1
+  },
+  {
+    O_DIRT_SLOPED_UP_LEFT,                     TRUE,
+    EL_BD_SAND_SLOPED_UP_LEFT,                 -1, -1
+  },
+  {
+    O_DIRT_SLOPED_DOWN_LEFT,                   TRUE,
+    EL_BD_SAND_SLOPED_DOWN_LEFT,               -1, -1
+  },
+  {
+    O_DIRT_SLOPED_DOWN_RIGHT,                  TRUE,
+    EL_BD_SAND_SLOPED_DOWN_RIGHT,              -1, -1
+  },
+  {
+    O_DIRT_BALL,                               TRUE,
+    EL_BD_SAND_BALL,                           -1, -1
+  },
+  {
+    O_DIRT_BALL_F,                             FALSE,
+    EL_BD_SAND_BALL,                           ACTION_FALLING, -1
+  },
+  {
+    O_DIRT_LOOSE,                              TRUE,
+    EL_BD_SAND_LOOSE,                          -1, -1
+  },
+  {
+    O_DIRT_LOOSE_F,                            FALSE,
+    EL_BD_SAND_LOOSE,                          ACTION_FALLING, -1
+  },
+  {
+    O_DIRT2,                                   TRUE,
+    EL_BD_SAND_2,                              -1, -1
+  },
+  {
+    O_BRICK,                                   TRUE,
+    EL_BD_WALL,                                        -1, -1
+  },
+  {
+    O_BRICK_SLOPED_UP_RIGHT,                   TRUE,
+    EL_BD_WALL_SLOPED_UP_RIGHT,                        -1, -1
+  },
+  {
+    O_BRICK_SLOPED_UP_LEFT,                    TRUE,
+    EL_BD_WALL_SLOPED_UP_LEFT,                 -1, -1
+  },
+  {
+    O_BRICK_SLOPED_DOWN_LEFT,                  TRUE,
+    EL_BD_WALL_SLOPED_DOWN_LEFT,               -1, -1
+  },
+  {
+    O_BRICK_SLOPED_DOWN_RIGHT,                 TRUE,
+    EL_BD_WALL_SLOPED_DOWN_RIGHT,              -1, -1
+  },
+  {
+    O_BRICK_NON_SLOPED,                                TRUE,
+    EL_BD_WALL_NON_SLOPED,                     -1, -1
+  },
+  {
+    O_MAGIC_WALL,                              TRUE,
+    EL_BD_MAGIC_WALL,                          ACTION_ACTIVE, -1
+  },
+  {
+    O_PRE_OUTBOX,                              TRUE,
+    EL_BD_EXIT_CLOSED,                         -1, -1
+  },
+  {
+    O_OUTBOX,                                  TRUE,
+    EL_BD_EXIT_OPEN,                           -1, -1
+  },
+  {
+    O_PRE_INVIS_OUTBOX,                                TRUE,
+    EL_BD_INVISIBLE_EXIT_CLOSED,               -1, -1
+  },
+  {
+    O_INVIS_OUTBOX,                            TRUE,
+    EL_BD_INVISIBLE_EXIT_OPEN,                 -1, -1
+  },
+  {
+    O_STEEL,                                   TRUE,
+    EL_BD_STEELWALL,                           -1, -1
+  },
+  {
+    O_STEEL_SLOPED_UP_RIGHT,                   TRUE,
+    EL_BD_STEELWALL_SLOPED_UP_RIGHT,           -1, -1
+  },
+  {
+    O_STEEL_SLOPED_UP_LEFT,                    TRUE,
+    EL_BD_STEELWALL_SLOPED_UP_LEFT,            -1, -1
+  },
+  {
+    O_STEEL_SLOPED_DOWN_LEFT,                  TRUE,
+    EL_BD_STEELWALL_SLOPED_DOWN_LEFT,          -1, -1
+  },
+  {
+    O_STEEL_SLOPED_DOWN_RIGHT,                 TRUE,
+    EL_BD_STEELWALL_SLOPED_DOWN_RIGHT,         -1, -1
+  },
+  {
+    O_STEEL_EXPLODABLE,                                TRUE,
+    EL_BD_STEELWALL_EXPLODABLE,                        -1, -1
+  },
+  {
+    O_STEEL_EATABLE,                           TRUE,
+    EL_BD_STEELWALL_DIGGABLE,                  -1, -1
+  },
+  {
+    O_BRICK_EATABLE,                           TRUE,
+    EL_BD_WALL_DIGGABLE,                       -1, -1
+  },
+  {
+    O_STONE,                                   TRUE,
+    EL_BD_ROCK,                                        -1, -1
+  },
+  {
+    O_STONE_F,                                 FALSE,
+    EL_BD_ROCK,                                        ACTION_FALLING, -1
+  },
+  {
+    O_FLYING_STONE,                            TRUE,
+    EL_BD_FLYING_ROCK,                         -1, -1
+  },
+  {
+    O_FLYING_STONE_F,                          FALSE,
+    EL_BD_FLYING_ROCK,                         ACTION_FALLING, -1
+  },
+  {
+    O_MEGA_STONE,                              TRUE,
+    EL_BD_MEGA_ROCK,                           -1, -1
+  },
+  {
+    O_MEGA_STONE_F,                            FALSE,
+    EL_BD_MEGA_ROCK,                           ACTION_FALLING, -1
+  },
+  {
+    O_DIAMOND,                                 TRUE,
+    EL_BD_DIAMOND,                             -1, -1
+  },
+  {
+    O_DIAMOND_F,                               FALSE,
+    EL_BD_DIAMOND,                             ACTION_FALLING, -1
+  },
+  {
+    O_FLYING_DIAMOND,                          TRUE,
+    EL_BD_FLYING_DIAMOND,                      -1, -1
+  },
+  {
+    O_FLYING_DIAMOND_F,                                FALSE,
+    EL_BD_FLYING_DIAMOND,                      ACTION_FALLING, -1
+  },
+  {
+    O_NUT,                                     TRUE,
+    EL_BD_NUT,                                 -1, -1
+  },
+  {
+    O_NUT_F,                                   FALSE,
+    EL_BD_NUT,                                 ACTION_FALLING, -1
+  },
+  {
+    O_BLADDER_SPENDER,                         TRUE,
+    EL_BD_BLADDER_SPENDER,                     -1, -1
+  },
+  {
+    O_INBOX,                                   TRUE,
+    EL_BD_INBOX,                               -1, -1
+  },
+  {
+    O_H_EXPANDING_WALL,                                TRUE,
+    EL_BD_EXPANDABLE_WALL_HORIZONTAL,          -1, -1
+  },
+  {
+    O_V_EXPANDING_WALL,                                TRUE,
+    EL_BD_EXPANDABLE_WALL_VERTICAL,            -1, -1
+  },
+  {
+    O_EXPANDING_WALL,                          TRUE,
+    EL_BD_EXPANDABLE_WALL_ANY,                 -1, -1
+  },
+  {
+    O_H_EXPANDING_STEEL_WALL,                  TRUE,
+    EL_BD_EXPANDABLE_STEELWALL_HORIZONTAL,     -1, -1
+  },
+  {
+    O_V_EXPANDING_STEEL_WALL,                  TRUE,
+    EL_BD_EXPANDABLE_STEELWALL_VERTICAL,       -1, -1
+  },
+  {
+    O_EXPANDING_STEEL_WALL,                    TRUE,
+    EL_BD_EXPANDABLE_STEELWALL_ANY,            -1, -1
+  },
+  {
+    O_EXPANDING_WALL_SWITCH,                   TRUE,
+    EL_BD_EXPANDABLE_WALL_SWITCH_HORIZONTAL,   -1, -1
+  },
+  {
+    O_CREATURE_SWITCH,                         TRUE,
+    EL_BD_CREATURE_SWITCH,                     -1, -1
+  },
+  {
+    O_BITER_SWITCH,                            TRUE,
+    EL_BD_BITER_SWITCH_1,                      -1, -1
+  },
+  {
+    O_REPLICATOR_SWITCH,                       TRUE,
+    EL_BD_REPLICATOR_SWITCH,                   -1, -1
+  },
+  {
+    O_CONVEYOR_SWITCH,                         TRUE,
+    EL_BD_CONVEYOR_SWITCH,                     -1, -1
+  },
+  {
+    O_CONVEYOR_DIR_SWITCH,                     TRUE,
+    EL_BD_CONVEYOR_DIR_SWITCH_RIGHT,           -1, -1
+  },
+  {
+    O_ACID,                                    TRUE,
+    EL_BD_ACID,                                        -1, -1
+  },
+  {
+    O_FALLING_WALL,                            TRUE,
+    EL_BD_FALLING_WALL,                                -1, -1
+  },
+  {
+    O_FALLING_WALL_F,                          FALSE,
+    EL_BD_FALLING_WALL,                                ACTION_FALLING, -1
+  },
+  {
+    O_BOX,                                     TRUE,
+    EL_BD_BOX,                                 -1, -1
+  },
+  {
+    O_TIME_PENALTY,                            TRUE,
+    EL_BD_TIME_PENALTY,                                -1, -1
+  },
+  {
+    O_GRAVESTONE,                              TRUE,
+    EL_BD_GRAVESTONE,                          -1, -1
+  },
+  {
+    O_STONE_GLUED,                             TRUE,
+    EL_BD_ROCK_GLUED,                          -1, -1
+  },
+  {
+    O_DIAMOND_GLUED,                           TRUE,
+    EL_BD_DIAMOND_GLUED,                       -1, -1
+  },
+  {
+    O_DIAMOND_KEY,                             TRUE,
+    EL_BD_DIAMOND_KEY,                         -1, -1
+  },
+  {
+    O_TRAPPED_DIAMOND,                         TRUE,
+    EL_BD_TRAPPED_DIAMOND,                     -1, -1
+  },
+  {
+    O_CLOCK,                                   TRUE,
+    EL_BD_CLOCK,                               -1, -1
+  },
+  {
+    O_DIRT_GLUED,                              TRUE,
+    EL_BD_SAND_GLUED,                          -1, -1
+  },
+  {
+    O_KEY_1,                                   TRUE,
+    EL_BD_KEY_1,                               -1, -1
+  },
+  {
+    O_KEY_2,                                   TRUE,
+    EL_BD_KEY_2,                               -1, -1
+  },
+  {
+    O_KEY_3,                                   TRUE,
+    EL_BD_KEY_3,                               -1, -1
+  },
+  {
+    O_DOOR_1,                                  TRUE,
+    EL_BD_GATE_1,                              -1, -1
+  },
+  {
+    O_DOOR_2,                                  TRUE,
+    EL_BD_GATE_2,                              -1, -1
+  },
+  {
+    O_DOOR_3,                                  TRUE,
+    EL_BD_GATE_3,                              -1, -1
+  },
+  {
+    O_POT,                                     TRUE,
+    EL_BD_POT,                                 -1, -1
+  },
+  {
+    O_GRAVITY_SWITCH,                          TRUE,
+    EL_BD_GRAVITY_SWITCH,                      -1, -1
+  },
+  {
+    O_PNEUMATIC_HAMMER,                                TRUE,
+    EL_BD_PNEUMATIC_HAMMER,                    -1, -1
+  },
+  {
+    O_TELEPORTER,                              TRUE,
+    EL_BD_TELEPORTER,                          -1, -1
+  },
+  {
+    O_SKELETON,                                        TRUE,
+    EL_BD_SKELETON,                            -1, -1
+  },
+  {
+    O_WATER,                                   TRUE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_1,                                 FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_2,                                 FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_3,                                 FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_4,                                 FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_5,                                 FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_6,                                 FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_7,                                 FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_8,                                 FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_9,                                 FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_10,                                        FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_11,                                        FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_12,                                        FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_13,                                        FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_14,                                        FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_15,                                        FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_WATER_16,                                        FALSE,
+    EL_BD_WATER,                               -1, -1
+  },
+  {
+    O_COW_1,                                   TRUE,
+    EL_BD_COW_LEFT,                            -1, -1
+  },
+  {
+    O_COW_2,                                   TRUE,
+    EL_BD_COW_UP,                              -1, -1
+  },
+  {
+    O_COW_3,                                   TRUE,
+    EL_BD_COW_RIGHT,                           -1, -1
+  },
+  {
+    O_COW_4,                                   TRUE,
+    EL_BD_COW_DOWN,                            -1, -1
+  },
+  {
+    O_COW_ENCLOSED_1,                          FALSE,
+    EL_BD_COW_DOWN,                            -1, -1
+  },
+  {
+    O_COW_ENCLOSED_2,                          FALSE,
+    EL_BD_COW_DOWN,                            -1, -1
+  },
+  {
+    O_COW_ENCLOSED_3,                          FALSE,
+    EL_BD_COW_DOWN,                            -1, -1
+  },
+  {
+    O_COW_ENCLOSED_4,                          FALSE,
+    EL_BD_COW_DOWN,                            -1, -1
+  },
+  {
+    O_COW_ENCLOSED_5,                          FALSE,
+    EL_BD_COW_DOWN,                            -1, -1
+  },
+  {
+    O_COW_ENCLOSED_6,                          FALSE,
+    EL_BD_COW_DOWN,                            -1, -1
+  },
+  {
+    O_COW_ENCLOSED_7,                          FALSE,
+    EL_BD_COW_DOWN,                            -1, -1
+  },
+  {
+    O_WALLED_DIAMOND,                          TRUE,
+    EL_BD_WALL_DIAMOND,                                -1, -1
+  },
+  {
+    O_WALLED_KEY_1,                            TRUE,
+    EL_BD_WALL_KEY_1,                          -1, -1
+  },
+  {
+    O_WALLED_KEY_2,                            TRUE,
+    EL_BD_WALL_KEY_2,                          -1, -1
+  },
+  {
+    O_WALLED_KEY_3,                            TRUE,
+    EL_BD_WALL_KEY_3,                          -1, -1
+  },
+  {
+    O_AMOEBA,                                  TRUE,
+    EL_BD_AMOEBA,                              -1, -1
+  },
+  {
+    O_AMOEBA_2,                                        TRUE,
+    EL_BD_AMOEBA_2,                            -1, -1
+  },
+  {
+    O_REPLICATOR,                              TRUE,
+    EL_BD_REPLICATOR,                          -1, -1
+  },
+  {
+    O_CONVEYOR_LEFT,                           TRUE,
+    EL_BD_CONVEYOR_LEFT,                       -1, -1
+  },
+  {
+    O_CONVEYOR_RIGHT,                          TRUE,
+    EL_BD_CONVEYOR_RIGHT,                      -1, -1
+  },
+  {
+    O_LAVA,                                    TRUE,
+    EL_BD_LAVA,                                        -1, -1
+  },
+  {
+    O_SWEET,                                   TRUE,
+    EL_BD_SWEET,                               -1, -1
+  },
+  {
+    O_VOODOO,                                  TRUE,
+    EL_BD_VOODOO_DOLL,                         -1, -1
+  },
+  {
+    O_SLIME,                                   TRUE,
+    EL_BD_SLIME,                               -1, -1
+  },
+  {
+    O_BLADDER,                                 TRUE,
+    EL_BD_BLADDER,                             -1, -1
+  },
+  {
+    O_BLADDER_1,                               FALSE,
+    EL_BD_BLADDER,                             -1, -1
+  },
+  {
+    O_BLADDER_2,                               FALSE,
+    EL_BD_BLADDER,                             -1, -1
+  },
+  {
+    O_BLADDER_3,                               FALSE,
+    EL_BD_BLADDER,                             -1, -1
+  },
+  {
+    O_BLADDER_4,                               FALSE,
+    EL_BD_BLADDER,                             -1, -1
+  },
+  {
+    O_BLADDER_5,                               FALSE,
+    EL_BD_BLADDER,                             -1, -1
+  },
+  {
+    O_BLADDER_6,                               FALSE,
+    EL_BD_BLADDER,                             -1, -1
+  },
+  {
+    O_BLADDER_7,                               FALSE,
+    EL_BD_BLADDER,                             -1, -1
+  },
+  {
+    O_BLADDER_8,                               FALSE,
+    EL_BD_BLADDER,                             -1, -1
+  },
+  {
+    O_WAITING_STONE,                           TRUE,
+    EL_BD_WAITING_ROCK,                                -1, -1
+  },
+  {
+    O_CHASING_STONE,                           TRUE,
+    EL_BD_CHASING_ROCK,                                -1, -1
+  },
+  {
+    O_GHOST,                                   TRUE,
+    EL_BD_GHOST,                               -1, -1
+  },
+  {
+    O_FIREFLY_1,                               TRUE,
+    EL_BD_FIREFLY_LEFT,                                -1, -1
+  },
+  {
+    O_FIREFLY_2,                               TRUE,
+    EL_BD_FIREFLY_UP,                          -1, -1
+  },
+  {
+    O_FIREFLY_3,                               TRUE,
+    EL_BD_FIREFLY_RIGHT,                       -1, -1
+  },
+  {
+    O_FIREFLY_4,                               TRUE,
+    EL_BD_FIREFLY_DOWN,                                -1, -1
+  },
+  {
+    O_ALT_FIREFLY_1,                           TRUE,
+    EL_BD_FIREFLY_2_LEFT,                      -1, -1
+  },
+  {
+    O_ALT_FIREFLY_2,                           TRUE,
+    EL_BD_FIREFLY_2_UP,                                -1, -1
+  },
+  {
+    O_ALT_FIREFLY_3,                           TRUE,
+    EL_BD_FIREFLY_2_RIGHT,                     -1, -1
+  },
+  {
+    O_ALT_FIREFLY_4,                           TRUE,
+    EL_BD_FIREFLY_2_DOWN,                      -1, -1
+  },
+  {
+    O_BUTTER_1,                                        TRUE,
+    EL_BD_BUTTERFLY_LEFT,                      -1, -1
+  },
+  {
+    O_BUTTER_2,                                        TRUE,
+    EL_BD_BUTTERFLY_UP,                                -1, -1
+  },
+  {
+    O_BUTTER_3,                                        TRUE,
+    EL_BD_BUTTERFLY_RIGHT,                     -1, -1
+  },
+  {
+    O_BUTTER_4,                                        TRUE,
+    EL_BD_BUTTERFLY_DOWN,                      -1, -1
+  },
+  {
+    O_ALT_BUTTER_1,                            TRUE,
+    EL_BD_BUTTERFLY_2_LEFT,                    -1, -1
+  },
+  {
+    O_ALT_BUTTER_2,                            TRUE,
+    EL_BD_BUTTERFLY_2_UP,                      -1, -1
+  },
+  {
+    O_ALT_BUTTER_3,                            TRUE,
+    EL_BD_BUTTERFLY_2_RIGHT,                   -1, -1
+  },
+  {
+    O_ALT_BUTTER_4,                            TRUE,
+    EL_BD_BUTTERFLY_2_DOWN,                    -1, -1
+  },
+  {
+    O_STONEFLY_1,                              TRUE,
+    EL_BD_STONEFLY_LEFT,                       -1, -1
+  },
+  {
+    O_STONEFLY_2,                              TRUE,
+    EL_BD_STONEFLY_UP,                         -1, -1
+  },
+  {
+    O_STONEFLY_3,                              TRUE,
+    EL_BD_STONEFLY_RIGHT,                      -1, -1
+  },
+  {
+    O_STONEFLY_4,                              TRUE,
+    EL_BD_STONEFLY_DOWN,                       -1, -1
+  },
+  {
+    O_BITER_1,                                 TRUE,
+    EL_BD_BITER_UP,                            -1, -1
+  },
+  {
+    O_BITER_2,                                 TRUE,
+    EL_BD_BITER_RIGHT,                         -1, -1
+  },
+  {
+    O_BITER_3,                                 TRUE,
+    EL_BD_BITER_DOWN,                          -1, -1
+  },
+  {
+    O_BITER_4,                                 TRUE,
+    EL_BD_BITER_LEFT,                          -1, -1
+  },
+  {
+    O_DRAGONFLY_1,                             TRUE,
+    EL_BD_DRAGONFLY_LEFT,                      -1, -1
+  },
+  {
+    O_DRAGONFLY_2,                             TRUE,
+    EL_BD_DRAGONFLY_UP,                                -1, -1
+  },
+  {
+    O_DRAGONFLY_3,                             TRUE,
+    EL_BD_DRAGONFLY_RIGHT,                     -1, -1
+  },
+  {
+    O_DRAGONFLY_4,                             TRUE,
+    EL_BD_DRAGONFLY_DOWN,                      -1, -1
+  },
+  {
+    O_PRE_PL_1,                                        FALSE,
+    EL_BD_PLAYER,                              ACTION_GROWING, -1
+  },
+  {
+    O_PRE_PL_2,                                        FALSE,
+    EL_BD_PLAYER,                              ACTION_GROWING, -1
+  },
+  {
+    O_PRE_PL_3,                                        FALSE,
+    EL_BD_PLAYER,                              ACTION_GROWING, -1
+  },
+  {
+    O_PLAYER,                                  TRUE,
+    EL_BD_PLAYER,                              -1, -1
+  },
+  {
+    O_PLAYER_BOMB,                             TRUE,
+    EL_BD_PLAYER_WITH_BOMB,                    -1, -1
+  },
+  {
+    O_PLAYER_GLUED,                            TRUE,
+    EL_BD_PLAYER_GLUED,                                -1, -1
+  },
+  {
+    O_PLAYER_STIRRING,                         TRUE,
+    EL_BD_PLAYER_STIRRING,                     -1, -1
+  },
+  {
+    O_BOMB,                                    TRUE,
+    EL_BD_BOMB,                                        -1, -1
+  },
+  {
+    O_BOMB_TICK_1,                             FALSE,
+    EL_BD_BOMB,                                        ACTION_ACTIVE, -1
+  },
+  {
+    O_BOMB_TICK_2,                             FALSE,
+    EL_BD_BOMB,                                        ACTION_ACTIVE, -1
+  },
+  {
+    O_BOMB_TICK_3,                             FALSE,
+    EL_BD_BOMB,                                        ACTION_ACTIVE, -1
+  },
+  {
+    O_BOMB_TICK_4,                             FALSE,
+    EL_BD_BOMB,                                        ACTION_ACTIVE, -1
+  },
+  {
+    O_BOMB_TICK_5,                             FALSE,
+    EL_BD_BOMB,                                        ACTION_ACTIVE, -1
+  },
+  {
+    O_BOMB_TICK_6,                             FALSE,
+    EL_BD_BOMB,                                        ACTION_ACTIVE, -1
+  },
+  {
+    O_BOMB_TICK_7,                             FALSE,
+    EL_BD_BOMB,                                        ACTION_ACTIVE, -1
+  },
+  {
+    O_NITRO_PACK,                              TRUE,
+    EL_BD_NITRO_PACK,                          -1, -1
+  },
+  {
+    O_NITRO_PACK_F,                            FALSE,
+    EL_BD_NITRO_PACK,                          ACTION_FALLING, -1
+  },
+  {
+    O_NITRO_PACK_EXPLODE,                      FALSE,
+    EL_BD_NITRO_PACK,                          ACTION_EXPLODING, -1
+  },
+  {
+    O_PRE_CLOCK_1,                             FALSE,
+    EL_BD_CLOCK,                               ACTION_GROWING, -1
+  },
+  {
+    O_PRE_CLOCK_2,                             FALSE,
+    EL_BD_CLOCK,                               ACTION_GROWING, -1
+  },
+  {
+    O_PRE_CLOCK_3,                             FALSE,
+    EL_BD_CLOCK,                               ACTION_GROWING, -1
+  },
+  {
+    O_PRE_CLOCK_4,                             FALSE,
+    EL_BD_CLOCK,                               ACTION_GROWING, -1
+  },
+  {
+    O_PRE_DIA_1,                               FALSE,
+    EL_BD_DIAMOND,                             ACTION_GROWING, -1
+  },
+  {
+    O_PRE_DIA_2,                               FALSE,
+    EL_BD_DIAMOND,                             ACTION_GROWING, -1
+  },
+  {
+    O_PRE_DIA_3,                               FALSE,
+    EL_BD_DIAMOND,                             ACTION_GROWING, -1
+  },
+  {
+    O_PRE_DIA_4,                               FALSE,
+    EL_BD_DIAMOND,                             ACTION_GROWING, -1
+  },
+  {
+    O_PRE_DIA_5,                               FALSE,
+    EL_BD_DIAMOND,                             ACTION_GROWING, -1
+  },
+  {
+    O_EXPLODE_1,                               FALSE,
+    EL_DEFAULT,                                        ACTION_EXPLODING, -1
+  },
+  {
+    O_EXPLODE_2,                               FALSE,
+    EL_DEFAULT,                                        ACTION_EXPLODING, -1
+  },
+  {
+    O_EXPLODE_3,                               FALSE,
+    EL_DEFAULT,                                        ACTION_EXPLODING, -1
+  },
+  {
+    O_EXPLODE_4,                               FALSE,
+    EL_DEFAULT,                                        ACTION_EXPLODING, -1
+  },
+  {
+    O_EXPLODE_5,                               FALSE,
+    EL_DEFAULT,                                        ACTION_EXPLODING, -1
+  },
+  {
+    O_PRE_STONE_1,                             FALSE,
+    EL_BD_ROCK,                                        ACTION_GROWING, -1
+  },
+  {
+    O_PRE_STONE_2,                             FALSE,
+    EL_BD_ROCK,                                        ACTION_GROWING, -1
+  },
+  {
+    O_PRE_STONE_3,                             FALSE,
+    EL_BD_ROCK,                                        ACTION_GROWING, -1
+  },
+  {
+    O_PRE_STONE_4,                             FALSE,
+    EL_BD_ROCK,                                        ACTION_GROWING, -1
+  },
+  {
+    O_PRE_STEEL_1,                             FALSE,
+    EL_BD_STEELWALL,                           ACTION_GROWING, -1
+  },
+  {
+    O_PRE_STEEL_2,                             FALSE,
+    EL_BD_STEELWALL,                           ACTION_GROWING, -1
+  },
+  {
+    O_PRE_STEEL_3,                             FALSE,
+    EL_BD_STEELWALL,                           ACTION_GROWING, -1
+  },
+  {
+    O_PRE_STEEL_4,                             FALSE,
+    EL_BD_STEELWALL,                           ACTION_GROWING, -1
+  },
+  {
+    O_GHOST_EXPL_1,                            FALSE,
+    EL_BD_GHOST,                               ACTION_EXPLODING, -1
+  },
+  {
+    O_GHOST_EXPL_2,                            FALSE,
+    EL_BD_GHOST,                               ACTION_EXPLODING, -1
+  },
+  {
+    O_GHOST_EXPL_3,                            FALSE,
+    EL_BD_GHOST,                               ACTION_EXPLODING, -1
+  },
+  {
+    O_GHOST_EXPL_4,                            FALSE,
+    EL_BD_GHOST,                               ACTION_EXPLODING, -1
+  },
+  {
+    O_BOMB_EXPL_1,                             FALSE,
+    EL_BD_BOMB,                                        ACTION_EXPLODING, -1
+  },
+  {
+    O_BOMB_EXPL_2,                             FALSE,
+    EL_BD_BOMB,                                        ACTION_EXPLODING, -1
+  },
+  {
+    O_BOMB_EXPL_3,                             FALSE,
+    EL_BD_BOMB,                                        ACTION_EXPLODING, -1
+  },
+  {
+    O_BOMB_EXPL_4,                             FALSE,
+    EL_BD_BOMB,                                        ACTION_EXPLODING, -1
+  },
+  {
+    O_NITRO_EXPL_1,                            FALSE,
+    EL_BD_NITRO_PACK,                          ACTION_EXPLODING, -1
+  },
+  {
+    O_NITRO_EXPL_2,                            FALSE,
+    EL_BD_NITRO_PACK,                          ACTION_EXPLODING, -1
+  },
+  {
+    O_NITRO_EXPL_3,                            FALSE,
+    EL_BD_NITRO_PACK,                          ACTION_EXPLODING, -1
+  },
+  {
+    O_NITRO_EXPL_4,                            FALSE,
+    EL_BD_NITRO_PACK,                          ACTION_EXPLODING, -1
+  },
+  {
+    O_AMOEBA_2_EXPL_1,                         FALSE,
+    EL_BD_AMOEBA_2,                            ACTION_EXPLODING, -1
+  },
+  {
+    O_AMOEBA_2_EXPL_2,                         FALSE,
+    EL_BD_AMOEBA_2,                            ACTION_EXPLODING, -1
+  },
+  {
+    O_AMOEBA_2_EXPL_3,                         FALSE,
+    EL_BD_AMOEBA_2,                            ACTION_EXPLODING, -1
+  },
+  {
+    O_AMOEBA_2_EXPL_4,                         FALSE,
+    EL_BD_AMOEBA_2,                            ACTION_EXPLODING, -1
+  },
+  {
+    O_NUT_EXPL_1,                              FALSE,
+    EL_BD_NUT,                                 ACTION_BREAKING, -1
+  },
+  {
+    O_NUT_EXPL_2,                              FALSE,
+    EL_BD_NUT,                                 ACTION_BREAKING, -1
+  },
+  {
+    O_NUT_EXPL_3,                              FALSE,
+    EL_BD_NUT,                                 ACTION_BREAKING, -1
+  },
+  {
+    O_NUT_EXPL_4,                              FALSE,
+    EL_BD_NUT,                                 ACTION_BREAKING, -1
+  },
+  {
+    O_PLAYER_PNEUMATIC_LEFT,                   FALSE,
+    EL_BD_PLAYER,                              ACTION_HITTING, MV_BIT_LEFT
+  },
+  {
+    O_PLAYER_PNEUMATIC_RIGHT,                  FALSE,
+    EL_BD_PLAYER,                              ACTION_HITTING, MV_BIT_RIGHT
+  },
+  {
+    O_PNEUMATIC_ACTIVE_LEFT,                   TRUE,
+    EL_BD_PNEUMATIC_HAMMER,                    ACTION_HITTING, MV_BIT_LEFT
+  },
+  {
+    O_PNEUMATIC_ACTIVE_RIGHT,                  TRUE,
+    EL_BD_PNEUMATIC_HAMMER,                    ACTION_HITTING, MV_BIT_RIGHT
+  },
+
+  // helper (runtime) elements
+
+  {
+    O_FAKE_BONUS,                              FALSE,
+    EL_BD_FAKE_BONUS,                          -1, -1
+  },
+  {
+    O_INBOX_CLOSED,                            FALSE,
+    EL_BD_INBOX,                               -1, -1
+  },
+  {
+    O_INBOX_OPEN,                              FALSE,
+    EL_BD_INBOX,                               ACTION_OPENING, -1
+  },
+  {
+    O_OUTBOX_CLOSED,                           FALSE,
+    EL_BD_EXIT_CLOSED,                         -1, -1
+  },
+  {
+    O_OUTBOX_OPEN,                             FALSE,
+    EL_BD_EXIT_OPEN,                           -1, -1
+  },
+  {
+    O_COVERED,                                 FALSE,
+    EL_BD_COVERED,                             -1, -1
+  },
+  {
+    O_PLAYER_LEFT,                             FALSE,
+    EL_BD_PLAYER,                              ACTION_MOVING, MV_BIT_LEFT
+  },
+  {
+    O_PLAYER_RIGHT,                            FALSE,
+    EL_BD_PLAYER,                              ACTION_MOVING, MV_BIT_RIGHT
+  },
+  {
+    O_PLAYER_BLINK,                            FALSE,
+    EL_BD_PLAYER,                              ACTION_BORING_1, -1
+  },
+  {
+    O_PLAYER_TAP,                              FALSE,
+    EL_BD_PLAYER,                              ACTION_BORING_2, -1
+  },
+  {
+    O_PLAYER_TAP_BLINK,                                FALSE,
+    EL_BD_PLAYER,                              ACTION_BORING_3, -1
+  },
+  {
+    O_CREATURE_SWITCH_ON,                      FALSE,
+    EL_BD_CREATURE_SWITCH_ACTIVE,              -1, -1
+  },
+  {
+    O_EXPANDING_WALL_SWITCH_HORIZ,             FALSE,
+    EL_BD_EXPANDABLE_WALL_SWITCH_HORIZONTAL,   -1, -1
+  },
+  {
+    O_EXPANDING_WALL_SWITCH_VERT,              FALSE,
+    EL_BD_EXPANDABLE_WALL_SWITCH_VERTICAL,     -1, -1
+  },
+  {
+    O_GRAVITY_SWITCH_ACTIVE,                   FALSE,
+    EL_BD_GRAVITY_SWITCH_ACTIVE,               -1, -1
+  },
+  {
+    O_REPLICATOR_SWITCH_OFF,                   FALSE,
+    EL_BD_REPLICATOR_SWITCH,                   -1, -1
+  },
+  {
+    O_REPLICATOR_SWITCH_ON,                    FALSE,
+    EL_BD_REPLICATOR_SWITCH_ACTIVE,            -1, -1
+  },
+  {
+    O_CONVEYOR_DIR_NORMAL,                     FALSE,
+    EL_BD_CONVEYOR_DIR_SWITCH_RIGHT,           -1, -1
+  },
+  {
+    O_CONVEYOR_DIR_CHANGED,                    FALSE,
+    EL_BD_CONVEYOR_DIR_SWITCH_LEFT,            -1, -1
+  },
+  {
+    O_CONVEYOR_SWITCH_OFF,                     FALSE,
+    EL_BD_CONVEYOR_SWITCH,                     -1, -1
+  },
+  {
+    O_CONVEYOR_SWITCH_ON,                      FALSE,
+    EL_BD_CONVEYOR_SWITCH_ACTIVE,              -1, -1
+  },
+  {
+    O_MAGIC_WALL_ACTIVE,                       FALSE,
+    EL_BD_MAGIC_WALL_ACTIVE,                   -1, -1
+  },
+  {
+    O_REPLICATOR_ACTIVE,                       FALSE,
+    EL_BD_REPLICATOR_ACTIVE,                   -1, -1
+  },
+  {
+    O_CONVEYOR_LEFT_ACTIVE,                    FALSE,
+    EL_BD_CONVEYOR_LEFT_ACTIVE,                        -1, -1
+  },
+  {
+    O_CONVEYOR_RIGHT_ACTIVE,                   FALSE,
+    EL_BD_CONVEYOR_RIGHT_ACTIVE,               -1, -1
+  },
+  {
+    O_BITER_SWITCH_1,                          FALSE,
+    EL_BD_BITER_SWITCH_1,                      -1, -1
+  },
+  {
+    O_BITER_SWITCH_2,                          FALSE,
+    EL_BD_BITER_SWITCH_2,                      -1, -1
+  },
+  {
+    O_BITER_SWITCH_3,                          FALSE,
+    EL_BD_BITER_SWITCH_3,                      -1, -1
+  },
+  {
+    O_BITER_SWITCH_4,                          FALSE,
+    EL_BD_BITER_SWITCH_4,                      -1, -1
+  },
+
+  {
+    -1,                                                FALSE,
+    -1,                                                -1, -1
+  }
+};
+
+int map_element_RND_to_BD(int element_rnd)
+{
+  static unsigned short mapping_RND_to_BD[NUM_FILE_ELEMENTS];
+  static boolean mapping_initialized = FALSE;
+
+  if (!mapping_initialized)
+  {
+    int i;
+
+    // return "O_UNKNOWN" for all undefined elements in mapping array
+    for (i = 0; i < NUM_FILE_ELEMENTS; i++)
+      mapping_RND_to_BD[i] = O_UNKNOWN;
+
+    for (i = 0; bd_object_mapping_list[i].element_bd != -1; i++)
+      if (bd_object_mapping_list[i].is_rnd_to_bd_mapping)
+       mapping_RND_to_BD[bd_object_mapping_list[i].element_rnd] =
+         bd_object_mapping_list[i].element_bd;
+
+    mapping_initialized = TRUE;
+  }
+
+  if (element_rnd < 0 || element_rnd >= NUM_FILE_ELEMENTS)
+  {
+    Warn("invalid RND element %d", element_rnd);
+
+    return O_UNKNOWN;
+  }
+
+  return mapping_RND_to_BD[element_rnd];
+}
+
+int map_element_BD_to_RND(int element_bd)
+{
+  static unsigned short mapping_BD_to_RND[O_MAX_ALL];
+  static boolean mapping_initialized = FALSE;
+
+  if (!mapping_initialized)
+  {
+    int i;
+
+    // return "EL_UNKNOWN" for all undefined elements in mapping array
+    for (i = 0; i < O_MAX_ALL; i++)
+      mapping_BD_to_RND[i] = EL_UNKNOWN;
+
+    for (i = 0; bd_object_mapping_list[i].element_bd != -1; i++)
+      mapping_BD_to_RND[bd_object_mapping_list[i].element_bd] =
+       bd_object_mapping_list[i].element_rnd;
+
+    mapping_initialized = TRUE;
+  }
+
+  if (element_bd < 0 || element_bd >= O_MAX_ALL)
+  {
+    Warn("invalid BD element %d", element_bd);
+
+    return EL_UNKNOWN;
+  }
+
+  return mapping_BD_to_RND[element_bd];
+}
+
 static struct Mapping_EM_to_RND_object
 {
   int element_em;
@@ -8590,14 +9688,14 @@ unsigned int InitRND(int seed)
     return InitEngineRandom_RND(seed);
 }
 
-static struct Mapping_EM_to_RND_object object_mapping[GAME_TILE_MAX];
-static struct Mapping_EM_to_RND_player player_mapping[MAX_PLAYERS][PLY_MAX];
+static struct Mapping_EM_to_RND_object em_object_mapping[GAME_TILE_MAX];
+static struct Mapping_EM_to_RND_player em_player_mapping[MAX_PLAYERS][PLY_MAX];
 
 static int get_effective_element_EM(int tile, int frame_em)
 {
-  int element             = object_mapping[tile].element_rnd;
-  int action              = object_mapping[tile].action;
-  boolean is_backside     = object_mapping[tile].is_backside;
+  int element             = em_object_mapping[tile].element_rnd;
+  int action              = em_object_mapping[tile].action;
+  boolean is_backside     = em_object_mapping[tile].is_backside;
   boolean action_removing = (action == ACTION_DIGGING ||
                             action == ACTION_SNAPPING ||
                             action == ACTION_COLLECTING);
@@ -8745,8 +9843,8 @@ void ResetGfxAnimation_EM(int x, int y, int tile)
 void SetGfxAnimation_EM(struct GraphicInfo_EM *g_em,
                        int tile, int frame_em, int x, int y)
 {
-  int action = object_mapping[tile].action;
-  int direction = object_mapping[tile].direction;
+  int action = em_object_mapping[tile].action;
+  int direction = em_object_mapping[tile].direction;
   int effective_element = get_effective_element_EM(tile, frame_em);
   int graphic = (direction == MV_NONE ?
                 el_act2img(effective_element, action) :
@@ -8785,11 +9883,11 @@ void SetGfxAnimation_EM(struct GraphicInfo_EM *g_em,
   }
   else if (action_moving)
   {
-    boolean is_backside = object_mapping[tile].is_backside;
+    boolean is_backside = em_object_mapping[tile].is_backside;
 
     if (is_backside)
     {
-      int direction = object_mapping[tile].direction;
+      int direction = em_object_mapping[tile].direction;
       int move_dir = (action_falling ? MV_DOWN : direction);
 
       GfxFrame[x][y]++;
@@ -8844,9 +9942,9 @@ void SetGfxAnimation_EM(struct GraphicInfo_EM *g_em,
 void getGraphicSourceObjectExt_EM(struct GraphicInfo_EM *g_em,
                                  int tile, int frame_em, int x, int y)
 {
-  int action = object_mapping[tile].action;
-  int direction = object_mapping[tile].direction;
-  boolean is_backside = object_mapping[tile].is_backside;
+  int action = em_object_mapping[tile].action;
+  int direction = em_object_mapping[tile].direction;
+  boolean is_backside = em_object_mapping[tile].is_backside;
   int effective_element = get_effective_element_EM(tile, frame_em);
   int effective_action = action;
   int graphic = (direction == MV_NONE ?
@@ -8910,9 +10008,9 @@ void getGraphicSourceObjectExt_EM(struct GraphicInfo_EM *g_em,
 void getGraphicSourcePlayerExt_EM(struct GraphicInfo_EM *g_em,
                                  int player_nr, int anim, int frame_em)
 {
-  int element   = player_mapping[player_nr][anim].element_rnd;
-  int action    = player_mapping[player_nr][anim].action;
-  int direction = player_mapping[player_nr][anim].direction;
+  int element   = em_player_mapping[player_nr][anim].element_rnd;
+  int action    = em_player_mapping[player_nr][anim].action;
+  int direction = em_player_mapping[player_nr][anim].direction;
   int graphic = (direction == MV_NONE ?
                 el_act2img(element, action) :
                 el_act_dir2img(element, action, direction));
@@ -8942,10 +10040,10 @@ void InitGraphicInfo_EM(void)
   // always start with reliable default values
   for (i = 0; i < GAME_TILE_MAX; i++)
   {
-    object_mapping[i].element_rnd = EL_UNKNOWN;
-    object_mapping[i].is_backside = FALSE;
-    object_mapping[i].action = ACTION_DEFAULT;
-    object_mapping[i].direction = MV_NONE;
+    em_object_mapping[i].element_rnd = EL_UNKNOWN;
+    em_object_mapping[i].is_backside = FALSE;
+    em_object_mapping[i].action = ACTION_DEFAULT;
+    em_object_mapping[i].direction = MV_NONE;
   }
 
   // always start with reliable default values
@@ -8953,9 +10051,9 @@ void InitGraphicInfo_EM(void)
   {
     for (i = 0; i < PLY_MAX; i++)
     {
-      player_mapping[p][i].element_rnd = EL_UNKNOWN;
-      player_mapping[p][i].action = ACTION_DEFAULT;
-      player_mapping[p][i].direction = MV_NONE;
+      em_player_mapping[p][i].element_rnd = EL_UNKNOWN;
+      em_player_mapping[p][i].action = ACTION_DEFAULT;
+      em_player_mapping[p][i].direction = MV_NONE;
     }
   }
 
@@ -8963,14 +10061,14 @@ void InitGraphicInfo_EM(void)
   {
     int e = em_object_mapping_list[i].element_em;
 
-    object_mapping[e].element_rnd = em_object_mapping_list[i].element_rnd;
-    object_mapping[e].is_backside = em_object_mapping_list[i].is_backside;
+    em_object_mapping[e].element_rnd = em_object_mapping_list[i].element_rnd;
+    em_object_mapping[e].is_backside = em_object_mapping_list[i].is_backside;
 
     if (em_object_mapping_list[i].action != -1)
-      object_mapping[e].action = em_object_mapping_list[i].action;
+      em_object_mapping[e].action = em_object_mapping_list[i].action;
 
     if (em_object_mapping_list[i].direction != -1)
-      object_mapping[e].direction =
+      em_object_mapping[e].direction =
        MV_DIR_FROM_BIT(em_object_mapping_list[i].direction);
   }
 
@@ -8979,22 +10077,22 @@ void InitGraphicInfo_EM(void)
     int a = em_player_mapping_list[i].action_em;
     int p = em_player_mapping_list[i].player_nr;
 
-    player_mapping[p][a].element_rnd = em_player_mapping_list[i].element_rnd;
+    em_player_mapping[p][a].element_rnd = em_player_mapping_list[i].element_rnd;
 
     if (em_player_mapping_list[i].action != -1)
-      player_mapping[p][a].action = em_player_mapping_list[i].action;
+      em_player_mapping[p][a].action = em_player_mapping_list[i].action;
 
     if (em_player_mapping_list[i].direction != -1)
-      player_mapping[p][a].direction =
+      em_player_mapping[p][a].direction =
        MV_DIR_FROM_BIT(em_player_mapping_list[i].direction);
   }
 
   for (i = 0; i < GAME_TILE_MAX; i++)
   {
-    int element = object_mapping[i].element_rnd;
-    int action = object_mapping[i].action;
-    int direction = object_mapping[i].direction;
-    boolean is_backside = object_mapping[i].is_backside;
+    int element = em_object_mapping[i].element_rnd;
+    int action = em_object_mapping[i].action;
+    int direction = em_object_mapping[i].direction;
+    boolean is_backside = em_object_mapping[i].is_backside;
     boolean action_exploding = ((action == ACTION_EXPLODING ||
                                 action == ACTION_SMASHED_BY_ROCK ||
                                 action == ACTION_SMASHED_BY_SPRING) &&
@@ -9266,10 +10364,10 @@ void InitGraphicInfo_EM(void)
   {
     for (j = 0; j < 8; j++)
     {
-      int element = object_mapping[i].element_rnd;
-      int action = object_mapping[i].action;
-      int direction = object_mapping[i].direction;
-      boolean is_backside = object_mapping[i].is_backside;
+      int element = em_object_mapping[i].element_rnd;
+      int action = em_object_mapping[i].action;
+      int direction = em_object_mapping[i].direction;
+      boolean is_backside = em_object_mapping[i].is_backside;
       int graphic_action  = el_act_dir2img(element, action, direction);
       int graphic_default = el_act_dir2img(element, ACTION_DEFAULT, direction);
 
@@ -9309,9 +10407,9 @@ void InitGraphicInfo_EM(void)
   {
     for (i = 0; i < PLY_MAX; i++)
     {
-      int element = player_mapping[p][i].element_rnd;
-      int action = player_mapping[p][i].action;
-      int direction = player_mapping[p][i].direction;
+      int element = em_player_mapping[p][i].element_rnd;
+      int action = em_player_mapping[p][i].action;
+      int direction = em_player_mapping[p][i].direction;
 
       for (j = 0; j < 8; j++)
       {