rnd-20070907-1-src
[rocksndiamonds.git] / src / tools.c
index 2ae872b475000ea3d2f0bddca41248f332f09f1c..d950959c53d4e723912185e7a23f32ff4b22c9df 100644 (file)
@@ -118,7 +118,7 @@ void SetDrawtoField(int mode)
 
     drawto_field = fieldbuffer;
   }
-  else /* DRAW_DIRECT, DRAW_BACKBUFFER */
+  else /* DRAW_BACKBUFFER */
   {
     FX = SX;
     FY = SY;
@@ -129,7 +129,7 @@ void SetDrawtoField(int mode)
     redraw_x1 = 0;
     redraw_y1 = 0;
 
-    drawto_field = (mode == DRAW_DIRECT ? window :  backbuffer);
+    drawto_field = backbuffer;
   }
 }
 
@@ -154,23 +154,17 @@ void RedrawPlayfield(boolean force_redraw, int x, int y, int width, int height)
       height = gfx.sysize + 2 * TILEY;
     }
 
-    if (force_redraw || setup.direct_draw)
+    if (force_redraw)
     {
       int xx, yy;
       int x1 = (x - SX) / TILEX, y1 = (y - SY) / TILEY;
       int x2 = (x - SX + width) / TILEX, y2 = (y - SY + height) / TILEY;
 
-      if (setup.direct_draw)
-       SetDrawtoField(DRAW_BACKBUFFER);
-
       for (xx = BX1; xx <= BX2; xx++)
        for (yy = BY1; yy <= BY2; yy++)
          if (xx >= x1 && xx <= x2 && yy >= y1 && yy <= y2)
            DrawScreenField(xx, yy);
       DrawAllPlayers();
-
-      if (setup.direct_draw)
-       SetDrawtoField(DRAW_DIRECT);
     }
 
     if (setup.soft_scrolling)
@@ -241,8 +235,9 @@ void DrawMaskedBorder_ALL()
 
 void DrawMaskedBorder(int redraw_mask)
 {
-  /* do not draw masked screen borders when displaying title screens */
-  if (effectiveGameStatus() == GAME_MODE_TITLE)
+  /* never draw masked screen borders on borderless screens */
+  if (effectiveGameStatus() == GAME_MODE_LOADING ||
+      effectiveGameStatus() == GAME_MODE_TITLE)
     return;
 
   if (redraw_mask & REDRAW_ALL)
@@ -265,9 +260,6 @@ void BackToFront()
   int x,y;
   DrawBuffer *buffer = (drawto_field == window ? backbuffer : drawto_field);
 
-  if (setup.direct_draw && game_status == GAME_MODE_PLAYING)
-    redraw_mask &= ~REDRAW_MAIN;
-
   if (redraw_mask & REDRAW_TILES && redraw_tiles > REDRAWTILES_THRESHOLD)
     redraw_mask |= REDRAW_FIELD;
 
@@ -448,111 +440,64 @@ void BackToFront()
   redraw_mask = REDRAW_NONE;
 }
 
-void FadeToFront()
+static void FadeCrossSaveBackbuffer()
 {
-#if 0
-  long fading_delay = 300;
-
-  if (setup.fading && (redraw_mask & REDRAW_FIELD))
-  {
-#endif
-
-#if 0
-    int x,y;
+  BlitBitmap(backbuffer, bitmap_db_cross, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
+}
 
-    ClearRectangle(window, REAL_SX,REAL_SY,FULL_SXSIZE,FULL_SYSIZE);
-    FlushDisplay();
+static void FadeExt(int fade_mask, int fade_mode, int fade_type)
+{
+  static int fade_type_skip = FADE_TYPE_NONE;
+  void (*draw_border_function)(void) = NULL;
+  Bitmap *bitmap = (fade_mode & FADE_TYPE_TRANSFORM ? bitmap_db_cross : NULL);
+  int x, y, width, height;
+  int fade_delay, post_delay;
 
-    for (i = 0; i < 2 * FULL_SYSIZE; i++)
+  if (fade_type == FADE_TYPE_FADE_OUT)
+  {
+    if (fade_type_skip != FADE_TYPE_NONE)
     {
-      for (y = 0; y < FULL_SYSIZE; y++)
-      {
-       BlitBitmap(backbuffer, window,
-                  REAL_SX,REAL_SY+i, FULL_SXSIZE,1, REAL_SX,REAL_SY+i);
-      }
-      FlushDisplay();
-      Delay(10);
-    }
-#endif
-
 #if 0
-    for (i = 1; i < FULL_SYSIZE; i+=2)
-      BlitBitmap(backbuffer, window,
-                REAL_SX,REAL_SY+i, FULL_SXSIZE,1, REAL_SX,REAL_SY+i);
-    FlushDisplay();
-    Delay(fading_delay);
+      printf("::: skipping %d ... [%d] (X)\n", fade_mode, fade_type_skip);
 #endif
 
-#if 0
-    SetClipOrigin(clip_gc[PIX_FADEMASK], 0, 0);
-    BlitBitmapMasked(backbuffer, window,
-                    REAL_SX,REAL_SY, FULL_SXSIZE,FULL_SYSIZE,
-                    REAL_SX,REAL_SY);
-    FlushDisplay();
-    Delay(fading_delay);
-
-    SetClipOrigin(clip_gc[PIX_FADEMASK], -1, -1);
-    BlitBitmapMasked(backbuffer, window,
-                    REAL_SX,REAL_SY, FULL_SXSIZE,FULL_SYSIZE,
-                    REAL_SX,REAL_SY);
-    FlushDisplay();
-    Delay(fading_delay);
-
-    SetClipOrigin(clip_gc[PIX_FADEMASK], 0, -1);
-    BlitBitmapMasked(backbuffer, window,
-                    REAL_SX,REAL_SY, FULL_SXSIZE,FULL_SYSIZE,
-                    REAL_SX,REAL_SY);
-    FlushDisplay();
-    Delay(fading_delay);
-
-    SetClipOrigin(clip_gc[PIX_FADEMASK], -1, 0);
-    BlitBitmapMasked(backbuffer, window,
-                    REAL_SX,REAL_SY, FULL_SXSIZE,FULL_SYSIZE,
-                    REAL_SX,REAL_SY);
-    FlushDisplay();
-    Delay(fading_delay);
+      /* skip all fade operations until specified fade operation */
+      if (fade_type & fade_type_skip)
+       fade_type_skip = FADE_TYPE_NONE;
 
-    redraw_mask &= ~REDRAW_MAIN;
-  }
-#endif
+      return;
+    }
 
-  BackToFront();
-}
+    if (fading.fade_mode & FADE_TYPE_TRANSFORM)
+    {
+      FadeCrossSaveBackbuffer();
 
-void FadeExt(int fade_mask, int fade_mode)
-{
-  static int fade_mode_skip = FADE_MODE_NONE;
-  void (*draw_border_function)(void) = NULL;
-#if 0
-  Bitmap *bitmap = (fade_mode != FADE_MODE_FADE_IN ? bitmap_db_cross : NULL);
-#else
-  Bitmap *bitmap = (fade_mode & FADE_TYPE_TRANSFORM ? bitmap_db_cross : NULL);
-#endif
-  int x, y, width, height;
-  int fade_delay, post_delay;
+      return;
+    }
+  }
 
   redraw_mask |= fade_mask;
 
-  if (fade_mode & FADE_TYPE_SKIP)
+  if (fade_type == FADE_TYPE_SKIP)
   {
 #if 0
-    printf("::: will skip %d ... [%d]\n", fade_mode, fade_mode_skip);
+    printf("::: will skip %d ... [%d]\n", fade_mode, fade_type_skip);
 #endif
 
-    fade_mode_skip = fade_mode;
+    fade_type_skip = fade_mode;
 
     return;
   }
 
-  if (fade_mode_skip & FADE_TYPE_SKIP)
+  if (fade_type_skip != FADE_TYPE_NONE)
   {
 #if 0
-    printf("::: skipping %d ... [%d]\n", fade_mode, fade_mode_skip);
+    printf("::: skipping %d ... [%d]\n", fade_mode, fade_type_skip);
 #endif
 
     /* skip all fade operations until specified fade operation */
-    if (fade_mode & fade_mode_skip)
-      fade_mode_skip = FADE_MODE_NONE;
+    if (fade_type & fade_type_skip)
+      fade_type_skip = FADE_TYPE_NONE;
 
     return;
   }
@@ -566,7 +511,7 @@ void FadeExt(int fade_mask, int fade_mode)
   }
 #endif
 
-#if 1
+#if 0
   if (fading.fade_mode == FADE_MODE_NONE)
   {
     BackToFront();
@@ -575,7 +520,19 @@ void FadeExt(int fade_mask, int fade_mode)
   }
 #endif
 
-  if (fade_mask & REDRAW_FIELD)
+  /* !!! what abount fade_mask == REDRAW_FIELD | REDRAW_ALL ??? !!! */
+
+#if 0
+  printf("::: NOW FADING %d ... [%d]\n", fade_mode, fade_type);
+#endif
+
+#if 0
+  if (fade_mask == REDRAW_NONE)
+    fade_mask = REDRAW_FIELD;
+#endif
+
+  // if (fade_mask & REDRAW_FIELD)
+  if (fade_mask == REDRAW_FIELD)
   {
     x = REAL_SX;
     y = REAL_SY;
@@ -585,7 +542,10 @@ void FadeExt(int fade_mask, int fade_mode)
     fade_delay = fading.fade_delay;
     post_delay = (fade_mode == FADE_MODE_FADE_OUT ? fading.post_delay : 0);
 
-    draw_border_function = DrawMaskedBorder_FIELD;
+    if (border.draw_masked_when_fading)
+      draw_border_function = DrawMaskedBorder_FIELD;   /* update when fading */
+    else
+      DrawMaskedBorder_FIELD();                                /* draw once */
   }
   else         /* REDRAW_ALL */
   {
@@ -599,15 +559,28 @@ void FadeExt(int fade_mask, int fade_mode)
   }
 
 #if 1
-  if (!setup.fade_screens || fade_delay == 0)
+  if (!setup.fade_screens ||
+      fade_delay == 0 ||
+      fading.fade_mode == FADE_MODE_NONE)
 #else
-  if (!setup.fade_screens || fade_delay == 0 || fading.anim_mode == ANIM_NONE)
+  if (!setup.fade_screens || fade_delay == 0)
 #endif
   {
     if (fade_mode == FADE_MODE_FADE_OUT)
+      return;
+
+#if 0
+    if (fade_mode == FADE_MODE_FADE_OUT &&
+       fading.fade_mode != FADE_MODE_NONE)
       ClearRectangle(backbuffer, x, y, width, height);
+#endif
 
+#if 1
+    BlitBitmap(backbuffer, window, x, y, width, height, x, y);
+    redraw_mask = REDRAW_NONE;
+#else
     BackToFront();
+#endif
 
     return;
   }
@@ -620,124 +593,22 @@ void FadeExt(int fade_mask, int fade_mode)
 
 void FadeIn(int fade_mask)
 {
-  global.border_status = game_status;
-
-#if 0
-  global.fading_status = game_status;
-
-  if (global.fading_type == TYPE_ENTER_MENU)
-    fading = menu.enter_menu;
-  else if (global.fading_type == TYPE_LEAVE_MENU)
-    fading = menu.leave_menu;
-  else if (global.fading_type == TYPE_ENTER_SCREEN)
-    fading = menu.enter_screen[global.fading_status];
-  else if (global.fading_type == TYPE_LEAVE_SCREEN)
-    fading = menu.leave_screen[global.fading_status];
-
-  printf("::: FadeIn: %s [0x%08x] [%d]\n",
-        global.fading_type == TYPE_ENTER_MENU ? "enter_menu" :
-        global.fading_type == TYPE_LEAVE_MENU ? "leave_menu" :
-        global.fading_type == TYPE_ENTER_SCREEN ? "enter_screen" :
-        global.fading_type == TYPE_LEAVE_SCREEN ? "leave_screen" : "(?)",
-        global.fading_type,
-        global.fading_status);
-#endif
-
-#if 1
-  // printf("::: now fading in...\n");
-
   if (fading.fade_mode & FADE_TYPE_TRANSFORM)
-    FadeExt(fade_mask, fading.fade_mode);
+    FadeExt(fade_mask, fading.fade_mode, FADE_TYPE_FADE_IN);
   else
-    FadeExt(fade_mask, FADE_MODE_FADE_IN);
-#else
-#if 1
-  if (fading.fade_mode == FADE_MODE_CROSSFADE)
-    FadeExt(fade_mask, FADE_MODE_CROSSFADE);
-  else
-    FadeExt(fade_mask, FADE_MODE_FADE_IN);
-#else
-  FadeExt(fade_mask, FADE_MODE_FADE_IN);
-#endif
-#endif
+    FadeExt(fade_mask, FADE_MODE_FADE_IN, FADE_TYPE_FADE_IN);
 }
 
 void FadeOut(int fade_mask)
 {
-#if 0
-  if (global.fading_type == TYPE_ENTER_MENU)
-    fading = menu.enter_menu;
-  else if (global.fading_type == TYPE_LEAVE_MENU)
-    fading = menu.leave_menu;
-  else if (global.fading_type == TYPE_ENTER_SCREEN)
-    fading = menu.enter_screen[global.fading_status];
-  else if (global.fading_type == TYPE_LEAVE_SCREEN)
-    fading = menu.leave_screen[global.fading_status];
-
-  printf("::: FadeOut: %s [0x%08x] [%d]\n",
-        global.fading_type == TYPE_ENTER_MENU ? "enter_menu" :
-        global.fading_type == TYPE_LEAVE_MENU ? "leave_menu" :
-        global.fading_type == TYPE_ENTER_SCREEN ? "enter_screen" :
-        global.fading_type == TYPE_LEAVE_SCREEN ? "leave_screen" : "(?)",
-        global.fading_type,
-        global.fading_status);
-#endif
-
-#if 1
-  // printf("::: fading.fade_mode == %d\n", fading.fade_mode);
-
   if (fading.fade_mode & FADE_TYPE_TRANSFORM)
-    FadeCrossSaveBackbuffer();
-  else
-    FadeExt(fade_mask, FADE_MODE_FADE_OUT);
-#else
-#if 1
-  if (fading.fade_mode == FADE_MODE_CROSSFADE)
-    FadeCrossSaveBackbuffer();
+    FadeExt(fade_mask, fading.fade_mode, FADE_TYPE_FADE_OUT);
   else
-    FadeExt(fade_mask, FADE_MODE_FADE_OUT);
-#else
-  FadeExt(fade_mask, FADE_MODE_FADE_OUT);
-#endif
-#endif
-}
-
-void FadeCross(int fade_mask)
-{
-  FadeExt(fade_mask, FADE_MODE_CROSSFADE);
-}
-
-void FadeCrossSaveBackbuffer()
-{
-  BlitBitmap(backbuffer, bitmap_db_cross, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
-}
-
-#if 0
-void FadeSetEnterMenu()
-{
-  global.fading_type = TYPE_ENTER_MENU;
-}
+    FadeExt(fade_mask, FADE_MODE_FADE_OUT, FADE_TYPE_FADE_OUT);
 
-void FadeSetLeaveMenu()
-{
-  global.fading_type = TYPE_LEAVE_MENU;
-}
-
-void FadeSetEnterScreen()
-{
-  global.fading_type = TYPE_ENTER_SCREEN;
-}
-
-void FadeSetLeaveScreen()
-{
-  // global.fading_type = TYPE_LEAVE_SCREEN;
-
-  global.fading_type = (global.fading_type == TYPE_ENTER_SCREEN ?
-                       TYPE_LEAVE_SCREEN : TYPE_LEAVE_MENU);
+  global.border_status = game_status;
 }
 
-#else
-
 static void FadeSetLeaveNext(struct TitleFadingInfo fading_leave, boolean set)
 {
   static struct TitleFadingInfo fading_leave_stored;
@@ -778,15 +649,19 @@ void FadeSetEnterScreen()
   printf("::: storing leave_screen[%d]\n", game_status);
 #endif
 
+  FadeSetLeaveNext(menu.leave_screen[game_status], TRUE);      /* store */
+}
+
+void FadeSetNextScreen()
+{
+  fading = menu.next_screen;
+
 #if 0
-  printf("::: - %d, %d / %d, %d\n",
-        menu.enter_screen[game_status].fade_mode,
-        menu.enter_screen[game_status].fade_delay,
-        menu.leave_screen[game_status].fade_mode,
-        menu.leave_screen[game_status].fade_delay);
+  printf("::: storing next_screen\n");
 #endif
 
-  FadeSetLeaveNext(menu.leave_screen[game_status], TRUE);      /* store */
+  // (do not overwrite fade mode set by FadeSetEnterScreen)
+  // FadeSetLeaveNext(fading, TRUE);   /* (keep same fade mode) */
 }
 
 void FadeSetLeaveScreen()
@@ -798,8 +673,6 @@ void FadeSetLeaveScreen()
   FadeSetLeaveNext(menu.leave_screen[game_status], FALSE);     /* recall */
 }
 
-#endif
-
 void FadeSetFromType(int type)
 {
   if (type & TYPE_ENTER_SCREEN)
@@ -819,12 +692,12 @@ void FadeSetDisabled()
 
 void FadeSkipNextFadeIn()
 {
-  FadeExt(0, FADE_MODE_SKIP_FADE_IN);
+  FadeExt(0, FADE_MODE_SKIP_FADE_IN, FADE_TYPE_SKIP);
 }
 
 void FadeSkipNextFadeOut()
 {
-  FadeExt(0, FADE_MODE_SKIP_FADE_OUT);
+  FadeExt(0, FADE_MODE_SKIP_FADE_OUT, FADE_TYPE_SKIP);
 }
 
 void SetWindowBackgroundImageIfDefined(int graphic)
@@ -910,7 +783,7 @@ void DrawBackgroundForGraphic(int x, int y, int width, int height, int graphic)
   DrawBackground(x, y, width, height);
 }
 
-void ClearWindow()
+void ClearField()
 {
   /* !!! "drawto" might still point to playfield buffer here (see above) !!! */
   /* (when entering hall of fame after playing) */
@@ -924,12 +797,6 @@ void ClearWindow()
   }
   else
     SetDrawtoField(DRAW_BACKBUFFER);
-
-  if (setup.direct_draw && game_status == GAME_MODE_PLAYING)
-  {
-    ClearRectangle(window, REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE);
-    SetDrawtoField(DRAW_DIRECT);
-  }
 }
 
 void MarkTileDirty(int x, int y)
@@ -2025,7 +1892,7 @@ void DrawLevel()
   int x,y;
 
   SetDrawBackgroundMask(REDRAW_NONE);
-  ClearWindow();
+  ClearField();
 
   for (x = BX1; x <= BX2; x++)
     for (y = BY1; y <= BY2; y++)
@@ -2592,9 +2459,6 @@ void DrawPlayer(struct PlayerInfo *player)
   if (!IN_SCR_FIELD(sx, sy))
     return;
 
-  if (setup.direct_draw)
-    SetDrawtoField(DRAW_BUFFERED);
-
   /* ----------------------------------------------------------------------- */
   /* draw things behind the player, if needed                                */
   /* ----------------------------------------------------------------------- */
@@ -2773,18 +2637,6 @@ void DrawPlayer(struct PlayerInfo *player)
       DrawLevelFieldThruMask(jx, jy);
   }
 
-  if (setup.direct_draw)
-  {
-    int dst_x = SX + SCREENX(MIN(jx, last_jx)) * TILEX;
-    int dst_y = SY + SCREENY(MIN(jy, last_jy)) * TILEY;
-    int x_size = TILEX * (1 + ABS(jx - last_jx));
-    int y_size = TILEY * (1 + ABS(jy - last_jy));
-
-    BlitBitmap(drawto_field, window,
-              dst_x, dst_y, x_size, y_size, dst_x, dst_y);
-    SetDrawtoField(DRAW_DIRECT);
-  }
-
   MarkTileDirty(sx, sy);
 }
 
@@ -4944,6 +4796,24 @@ em_object_mapping_list[] =
     Xsand_stonein_4,                   FALSE,  TRUE,
     EL_ROCK,                           ACTION_FILLING, -1
   },
+#if 1
+  {
+    Xsand_stonesand_1,                 FALSE,  FALSE,
+    EL_QUICKSAND_EMPTYING,             -1, -1
+  },
+  {
+    Xsand_stonesand_2,                 FALSE,  FALSE,
+    EL_QUICKSAND_EMPTYING,             -1, -1
+  },
+  {
+    Xsand_stonesand_3,                 FALSE,  FALSE,
+    EL_QUICKSAND_EMPTYING,             -1, -1
+  },
+  {
+    Xsand_stonesand_4,                 FALSE,  FALSE,
+    EL_QUICKSAND_EMPTYING,             -1, -1
+  },
+#else
   {
     Xsand_stonesand_1,                 FALSE,  FALSE,
     EL_QUICKSAND_FULL,                 -1, -1
@@ -4960,6 +4830,7 @@ em_object_mapping_list[] =
     Xsand_stonesand_4,                 FALSE,  FALSE,
     EL_QUICKSAND_FULL,                 -1, -1
   },
+#endif
   {
     Xsand_stoneout_1,                  FALSE,  FALSE,
     EL_ROCK,                           ACTION_EMPTYING, -1
@@ -4968,6 +4839,24 @@ em_object_mapping_list[] =
     Xsand_stoneout_2,                  FALSE,  FALSE,
     EL_ROCK,                           ACTION_EMPTYING, -1
   },
+#if 1
+  {
+    Xsand_sandstone_1,                 FALSE,  FALSE,
+    EL_QUICKSAND_FILLING,              -1, -1
+  },
+  {
+    Xsand_sandstone_2,                 FALSE,  FALSE,
+    EL_QUICKSAND_FILLING,              -1, -1
+  },
+  {
+    Xsand_sandstone_3,                 FALSE,  FALSE,
+    EL_QUICKSAND_FILLING,              -1, -1
+  },
+  {
+    Xsand_sandstone_4,                 FALSE,  FALSE,
+    EL_QUICKSAND_FILLING,              -1, -1
+  },
+#else
   {
     Xsand_sandstone_1,                 FALSE,  FALSE,
     EL_QUICKSAND_FULL,                 -1, -1
@@ -4984,6 +4873,7 @@ em_object_mapping_list[] =
     Xsand_sandstone_4,                 FALSE,  FALSE,
     EL_QUICKSAND_FULL,                 -1, -1
   },
+#endif
   {
     Xplant,                            TRUE,   FALSE,
     EL_EMC_PLANT,                      -1, -1
@@ -6062,36 +5952,227 @@ static struct Mapping_EM_to_RND_object object_mapping[TILE_MAX];
 static struct Mapping_EM_to_RND_player player_mapping[MAX_PLAYERS][SPR_MAX];
 #endif
 
+inline 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;
+  boolean action_removing = (action == ACTION_DIGGING ||
+                            action == ACTION_SNAPPING ||
+                            action == ACTION_COLLECTING);
+
+  if (frame_em < 7)
+  {
+    switch (tile)
+    {
+      case Yacid_splash_eB:
+      case Yacid_splash_wB:
+       return (frame_em > 5 ? EL_EMPTY : element);
+
+      default:
+       return element;
+    }
+  }
+  else /* frame_em == 7 */
+  {
+    switch (tile)
+    {
+      case Yacid_splash_eB:
+      case Yacid_splash_wB:
+       return EL_EMPTY;
+
+      case Yemerald_stone:
+       return EL_EMERALD;
+
+      case Ydiamond_stone:
+       return EL_ROCK;
+
+      case Xdrip_stretch:
+      case Xdrip_stretchB:
+      case Ydrip_s1:
+      case Ydrip_s1B:
+      case Xball_1B:
+      case Xball_2:
+      case Xball_2B:
+      case Yball_eat:
+      case Ykey_1_eat:
+      case Ykey_2_eat:
+      case Ykey_3_eat:
+      case Ykey_4_eat:
+      case Ykey_5_eat:
+      case Ykey_6_eat:
+      case Ykey_7_eat:
+      case Ykey_8_eat:
+      case Ylenses_eat:
+      case Ymagnify_eat:
+      case Ygrass_eat:
+      case Ydirt_eat:
+      case Xsand_stonein_1:
+      case Xsand_stonein_2:
+      case Xsand_stonein_3:
+      case Xsand_stonein_4:
+       return element;
+
+      default:
+       return (is_backside || action_removing ? EL_EMPTY : element);
+    }
+  }
+}
+
+inline static boolean check_linear_animation_EM(int tile)
+{
+  switch (tile)
+  {
+    case Xsand_stonesand_1:
+    case Xsand_sandstone_1:
+    case Xboom_1:
+    case Xdynamite_1:
+    case Ybug_w_n:
+    case Ybug_n_e:
+    case Ybug_e_s:
+    case Ybug_s_w:
+    case Ybug_e_n:
+    case Ybug_s_e:
+    case Ybug_w_s:
+    case Ybug_n_w:
+    case Ytank_w_n:
+    case Ytank_n_e:
+    case Ytank_e_s:
+    case Ytank_s_w:
+    case Ytank_e_n:
+    case Ytank_s_e:
+    case Ytank_w_s:
+    case Ytank_n_w:
+      return TRUE;
+  }
+
+  return FALSE;
+}
+
+inline static void set_crumbled_graphics_EM(struct GraphicInfo_EM *g_em,
+                                           boolean has_crumbled_graphics,
+                                           int crumbled, int sync_frame)
+{
+  /* if element can be crumbled, but certain action graphics are just empty
+     space (like instantly snapping sand to empty space in 1 frame), do not
+     treat these empty space graphics as crumbled graphics in EMC engine */
+  if (crumbled == IMG_EMPTY_SPACE)
+    has_crumbled_graphics = FALSE;
+
+  if (has_crumbled_graphics)
+  {
+    struct GraphicInfo *g_crumbled = &graphic_info[crumbled];
+    int frame_crumbled = getAnimationFrame(g_crumbled->anim_frames,
+                                          g_crumbled->anim_delay,
+                                          g_crumbled->anim_mode,
+                                          g_crumbled->anim_start_frame,
+                                          sync_frame);
+
+    getGraphicSource(crumbled, frame_crumbled, &g_em->crumbled_bitmap,
+                    &g_em->crumbled_src_x, &g_em->crumbled_src_y);
+
+    g_em->crumbled_border_size = graphic_info[crumbled].border_size;
+
+    g_em->has_crumbled_graphics = TRUE;
+  }
+  else
+  {
+    g_em->crumbled_bitmap = NULL;
+    g_em->crumbled_src_x = 0;
+    g_em->crumbled_src_y = 0;
+    g_em->crumbled_border_size = 0;
+
+    g_em->has_crumbled_graphics = FALSE;
+  }
+}
+
 void ResetGfxAnimation_EM(int x, int y, int tile)
 {
   GfxFrame[x][y] = 0;
 }
 
-void getGraphicSourceObjectExt_EM(int tile, int frame_em,
-                                 Bitmap **src_bitmap, int *src_x, int *src_y,
-                                 int x, int y)
+void SetGfxAnimation_EM(int tile, int frame_em, int x, int y)
 {
-  int element         = object_mapping[tile].element_rnd;
-  int action          = object_mapping[tile].action;
-  int direction       = object_mapping[tile].direction;
-  boolean is_backside = object_mapping[tile].is_backside;
+  int action = object_mapping[tile].action;
   boolean action_removing = (action == ACTION_DIGGING ||
                             action == ACTION_SNAPPING ||
                             action == ACTION_COLLECTING);
-  int effective_element = (frame_em > 0 ? element :
-                          is_backside ? EL_EMPTY :
-                          action_removing ? EL_EMPTY :
-                          element);
+  boolean action_moving   = (action == ACTION_FALLING ||
+                            action == ACTION_MOVING ||
+                            action == ACTION_PUSHING ||
+                            action == ACTION_EATING ||
+                            action == ACTION_FILLING ||
+                            action == ACTION_EMPTYING);
+  boolean action_falling  = (action == ACTION_FALLING ||
+                            action == ACTION_FILLING ||
+                            action == ACTION_EMPTYING);
+
+  if (action_removing || check_linear_animation_EM(tile))
+  {
+    GfxFrame[x][y] = frame_em;
+  }
+  else if (action_moving)
+  {
+    boolean is_backside = object_mapping[tile].is_backside;
+
+    if (is_backside)
+    {
+      int direction = object_mapping[tile].direction;
+      int move_dir = (action_falling ? MV_DOWN : direction);
+
+      GfxFrame[x][y]++;
+
+      if (move_dir == MV_LEFT)
+       GfxFrame[x - 1][y] = GfxFrame[x][y];
+      else if (move_dir == MV_RIGHT)
+       GfxFrame[x + 1][y] = GfxFrame[x][y];
+      else if (move_dir == MV_UP)
+       GfxFrame[x][y - 1] = GfxFrame[x][y];
+      else if (move_dir == MV_DOWN)
+       GfxFrame[x][y + 1] = GfxFrame[x][y];
+    }
+  }
+  else
+  {
+    GfxFrame[x][y]++;
+  }
+}
+
+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;
+  int effective_element = get_effective_element_EM(tile, frame_em);
   int graphic = (direction == MV_NONE ?
                 el_act2img(effective_element, action) :
                 el_act_dir2img(effective_element, action, direction));
+  int crumbled = (direction == MV_NONE ?
+                 el_act2crm(effective_element, action) :
+                 el_act_dir2crm(effective_element, action, direction));
+  int base_graphic = el_act2img(effective_element, ACTION_DEFAULT);
+  int base_crumbled = el_act2crm(effective_element, ACTION_DEFAULT);
+  boolean has_crumbled_graphics = (base_crumbled != base_graphic);
   struct GraphicInfo *g = &graphic_info[graphic];
+#if 0
+  struct GraphicInfo *g_crumbled = &graphic_info[crumbled];
+#endif
   int sync_frame;
 
+#if 0
+  if (frame_em == 0)   /* reset animation frame for certain elements */
+  {
+    if (check_linear_animation_EM(tile))
+      GfxFrame[x][y] = 0;
+  }
+#endif
+
   if (graphic_info[graphic].anim_global_sync)
     sync_frame = FrameCounter;
+  else if (IN_FIELD(x, y, MAX_LEV_FIELDX, MAX_LEV_FIELDY))
+    sync_frame = GfxFrame[x][y];
   else
-    sync_frame = 7 - frame_em;
+    sync_frame = 0;    /* playfield border (pseudo steel) */
 
   SetRandomAnimationValue(x, y);
 
@@ -6101,11 +6182,41 @@ void getGraphicSourceObjectExt_EM(int tile, int frame_em,
                                g->anim_start_frame,
                                sync_frame);
 
-  getGraphicSourceExt(graphic, frame, src_bitmap, src_x, src_y, FALSE);
+  getGraphicSourceExt(graphic, frame, &g_em->bitmap,
+                     &g_em->src_x, &g_em->src_y, FALSE);
+
+  /* (updating the "crumbled" graphic definitions is probably not really needed,
+     as animations for crumbled graphics can't be longer than one EMC cycle) */
+#if 1
+  set_crumbled_graphics_EM(g_em, has_crumbled_graphics, crumbled,
+                          sync_frame);
+
+#else
+
+  g_em->crumbled_bitmap = NULL;
+  g_em->crumbled_src_x = 0;
+  g_em->crumbled_src_y = 0;
+
+  g_em->has_crumbled_graphics = FALSE;
+
+  if (has_crumbled_graphics && crumbled != IMG_EMPTY_SPACE)
+  {
+    int frame_crumbled = getAnimationFrame(g_crumbled->anim_frames,
+                                          g_crumbled->anim_delay,
+                                          g_crumbled->anim_mode,
+                                          g_crumbled->anim_start_frame,
+                                          sync_frame);
+
+    getGraphicSource(crumbled, frame_crumbled, &g_em->crumbled_bitmap,
+                    &g_em->crumbled_src_x, &g_em->crumbled_src_y);
+
+    g_em->has_crumbled_graphics = TRUE;
+  }
+#endif
 }
 
-void getGraphicSourcePlayerExt_EM(int player_nr, int anim, int frame_em,
-                                 Bitmap **src_bitmap, int *src_x, int *src_y)
+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;
@@ -6118,10 +6229,19 @@ void getGraphicSourcePlayerExt_EM(int player_nr, int anim, int frame_em,
 
   InitPlayerGfxAnimation(&stored_player[player_nr], action, direction);
 
-  stored_player[player_nr].StepFrame = 7 - frame_em;
+  stored_player[player_nr].StepFrame = frame_em;
 
   sync_frame = stored_player[player_nr].Frame;
 
+  int frame = getAnimationFrame(g->anim_frames,
+                               g->anim_delay,
+                               g->anim_mode,
+                               g->anim_start_frame,
+                               sync_frame);
+
+  getGraphicSourceExt(graphic, frame, &g_em->bitmap,
+                     &g_em->src_x, &g_em->src_y, FALSE);
+
 #if 0
   printf("::: %d: %d, %d [%d]\n",
         player_nr,
@@ -6129,14 +6249,6 @@ void getGraphicSourcePlayerExt_EM(int player_nr, int anim, int frame_em,
         stored_player[player_nr].StepFrame,
         FrameCounter);
 #endif
-
-  int frame = getAnimationFrame(g->anim_frames,
-                               g->anim_delay,
-                               g->anim_mode,
-                               g->anim_start_frame,
-                               sync_frame);
-
-  getGraphicSourceExt(graphic, frame, src_bitmap, src_x, src_y, FALSE);
 }
 
 void InitGraphicInfo_EM(void)
@@ -6216,9 +6328,11 @@ void InitGraphicInfo_EM(void)
     int action = object_mapping[i].action;
     int direction = object_mapping[i].direction;
     boolean is_backside = object_mapping[i].is_backside;
+#if 0
     boolean action_removing = (action == ACTION_DIGGING ||
                               action == ACTION_SNAPPING ||
                               action == ACTION_COLLECTING);
+#endif
     boolean action_exploding = ((action == ACTION_EXPLODING ||
                                 action == ACTION_SMASHED_BY_ROCK ||
                                 action == ACTION_SMASHED_BY_SPRING) &&
@@ -6228,6 +6342,9 @@ void InitGraphicInfo_EM(void)
 
     for (j = 0; j < 8; j++)
     {
+#if 1
+      int effective_element = get_effective_element_EM(i, j);
+#else
       int effective_element = (j > 5 && i == Yacid_splash_eB ? EL_EMPTY :
                               j > 5 && i == Yacid_splash_wB ? EL_EMPTY :
                               j < 7 ? element :
@@ -6260,6 +6377,7 @@ void InitGraphicInfo_EM(void)
                               is_backside ? EL_EMPTY :
                               action_removing ? EL_EMPTY :
                               element);
+#endif
       int effective_action = (j < 7 ? action :
                              i == Xdrip_stretch ? action :
                              i == Xdrip_stretchB ? action :
@@ -6301,6 +6419,9 @@ void InitGraphicInfo_EM(void)
       boolean has_action_graphics = (graphic != base_graphic);
       boolean has_crumbled_graphics = (base_crumbled != base_graphic);
       struct GraphicInfo *g = &graphic_info[graphic];
+#if 0
+      struct GraphicInfo *g_crumbled = &graphic_info[crumbled];
+#endif
       struct GraphicInfo_EM *g_em = &graphic_info_em_object[i][7 - j];
       Bitmap *src_bitmap;
       int src_x, src_y;
@@ -6437,13 +6558,20 @@ void InitGraphicInfo_EM(void)
       g_em->width  = TILEX;
       g_em->height = TILEY;
 
+      g_em->preserve_background = FALSE;
+
+#if 1
+      set_crumbled_graphics_EM(g_em, has_crumbled_graphics, crumbled,
+                              sync_frame);
+
+#else
+
       g_em->crumbled_bitmap = NULL;
       g_em->crumbled_src_x = 0;
       g_em->crumbled_src_y = 0;
       g_em->crumbled_border_size = 0;
 
       g_em->has_crumbled_graphics = FALSE;
-      g_em->preserve_background = FALSE;
 
 #if 0
       if (has_crumbled_graphics && crumbled == IMG_EMPTY_SPACE)
@@ -6453,18 +6581,47 @@ void InitGraphicInfo_EM(void)
 #endif
 
       /* if element can be crumbled, but certain action graphics are just empty
-        space (like snapping sand with the original R'n'D graphics), do not
+        space (like instantly snapping sand to empty space in 1 frame), do not
         treat these empty space graphics as crumbled graphics in EMC engine */
       if (has_crumbled_graphics && crumbled != IMG_EMPTY_SPACE)
       {
-       getGraphicSource(crumbled, frame, &src_bitmap, &src_x, &src_y);
+       int frame_crumbled = getAnimationFrame(g_crumbled->anim_frames,
+                                              g_crumbled->anim_delay,
+                                              g_crumbled->anim_mode,
+                                              g_crumbled->anim_start_frame,
+                                              sync_frame);
+
+       getGraphicSource(crumbled, frame_crumbled, &src_bitmap, &src_x, &src_y);
 
        g_em->has_crumbled_graphics = TRUE;
        g_em->crumbled_bitmap = src_bitmap;
        g_em->crumbled_src_x = src_x;
        g_em->crumbled_src_y = src_y;
        g_em->crumbled_border_size = graphic_info[crumbled].border_size;
+
+
+#if 0
+       if (g_em == &graphic_info_em_object[207][0])
+         printf("... %d, %d [%d, %d, %d, %d] [%d, %d, %d, %d, %d, %d => %d]\n",
+                graphic_info_em_object[207][0].crumbled_src_x,
+                graphic_info_em_object[207][0].crumbled_src_y,
+
+                crumbled, frame, src_x, src_y,
+
+                g->anim_frames,
+                g->anim_delay,
+                g->anim_mode,
+                g->anim_start_frame,
+                sync_frame,
+                gfx.anim_random_frame,
+                frame);
+#endif
+
+#if 0
+       printf("::: EMC tile %d is crumbled\n", i);
+#endif
       }
+#endif
 
 #if 0
       if (element == EL_ROCK &&