rnd-20051209-1-src
[rocksndiamonds.git] / src / init.c
index a78ee6118bb5241ef391f7eb193ee46af187798c..f9dd0c1338bb8933f5bfeb18eb8bd7e2877ae277 100644 (file)
 #define CONFIG_TOKEN_FONT_INITIAL              "font.initial"
 
 
-struct FontBitmapInfo font_initial[NUM_INITIAL_FONTS];
+static struct FontBitmapInfo font_initial[NUM_INITIAL_FONTS];
 
-
-static void InitTileClipmasks()
+static int copy_properties[][5] =
 {
-#if 0
-#if defined(TARGET_X11)
-  XGCValues clip_gc_values;
-  unsigned long clip_gc_valuemask;
-
-#if defined(TARGET_X11_NATIVE)
-
-#if 0
-  GC copy_clipmask_gc;
-
-  static struct
   {
-    int start;
-    int count;
-  }
-  tile_needs_clipping[] =
-  {
-    { GFX_SPIELER1_UP, 4 },
-    { GFX_SPIELER1_DOWN, 4 },
-    { GFX_SPIELER1_LEFT, 4 },
-    { GFX_SPIELER1_RIGHT, 4 },
-    { GFX_SPIELER1_PUSH_LEFT, 4 },
-    { GFX_SPIELER1_PUSH_RIGHT, 4 },
-    { GFX_SPIELER2_UP, 4 },
-    { GFX_SPIELER2_DOWN, 4 },
-    { GFX_SPIELER2_LEFT, 4 },
-    { GFX_SPIELER2_RIGHT, 4 },
-    { GFX_SPIELER2_PUSH_LEFT, 4 },
-    { GFX_SPIELER2_PUSH_RIGHT, 4 },
-    { GFX_SPIELER3_UP, 4 },
-    { GFX_SPIELER3_DOWN, 4 },
-    { GFX_SPIELER3_LEFT, 4 },
-    { GFX_SPIELER3_RIGHT, 4 },
-    { GFX_SPIELER3_PUSH_LEFT, 4 },
-    { GFX_SPIELER3_PUSH_RIGHT, 4 },
-    { GFX_SPIELER4_UP, 4 },
-    { GFX_SPIELER4_DOWN, 4 },
-    { GFX_SPIELER4_LEFT, 4 },
-    { GFX_SPIELER4_RIGHT, 4 },
-    { GFX_SPIELER4_PUSH_LEFT, 4 },
-    { GFX_SPIELER4_PUSH_RIGHT, 4 },
-    { GFX_SP_MURPHY, 1 },
-    { GFX_MURPHY_GO_LEFT, 3 },
-    { GFX_MURPHY_GO_RIGHT, 3 },
-    { GFX_MURPHY_SNAP_UP, 1 },
-    { GFX_MURPHY_SNAP_DOWN, 1 },
-    { GFX_MURPHY_SNAP_RIGHT, 1 },
-    { GFX_MURPHY_SNAP_LEFT, 1 },
-    { GFX_MURPHY_PUSH_RIGHT, 1 },
-    { GFX_MURPHY_PUSH_LEFT, 1 },
-    { GFX_GEBLUBBER, 4 },
-    { GFX_DYNAMIT, 7 },
-    { GFX_DYNABOMB, 4 },
-    { GFX_EXPLOSION, 8 },
-    { GFX_SOKOBAN_OBJEKT, 1 },
-    { GFX_FUNKELN_BLAU, 3 },
-    { GFX_FUNKELN_WEISS, 3 },
-    { GFX2_SHIELD_PASSIVE, 3 },
-    { GFX2_SHIELD_ACTIVE, 3 },
-    { -1, 0 }
-  };
-#endif
-
-#endif /* TARGET_X11_NATIVE */
-#endif /* TARGET_X11 */
-
-  int i;
-
-  /* initialize pixmap array for special X11 tile clipping to Pixmap 'None' */
-  for (i = 0; i < NUM_TILES; i++)
-    tile_clipmask[i] = None;
-
-#if defined(TARGET_X11)
-  /* This stuff is needed because X11 (XSetClipOrigin(), to be precise) is
-     often very slow when preparing a masked XCopyArea() for big Pixmaps.
-     To prevent this, create small (tile-sized) mask Pixmaps which will then
-     be set much faster with XSetClipOrigin() and speed things up a lot. */
-
-  clip_gc_values.graphics_exposures = False;
-  clip_gc_valuemask = GCGraphicsExposures;
-  tile_clip_gc = XCreateGC(display, window->drawable,
-                          clip_gc_valuemask, &clip_gc_values);
-
-#if 0
-  for (i = 0; i < NUM_BITMAPS; i++)
+    EL_BUG,
+    EL_BUG_LEFT,               EL_BUG_RIGHT,
+    EL_BUG_UP,                 EL_BUG_DOWN
+  },
   {
-    if (pix[i]->clip_mask)
-    {
-      clip_gc_values.graphics_exposures = False;
-      clip_gc_values.clip_mask = pix[i]->clip_mask;
-      clip_gc_valuemask = GCGraphicsExposures | GCClipMask;
-      pix[i]->stored_clip_gc = XCreateGC(display, window->drawable,
-                                        clip_gc_valuemask, &clip_gc_values);
-    }
-  }
-#endif
-
-#if defined(TARGET_X11_NATIVE)
-
-#if 0
-  /* create graphic context structures needed for clipping */
-  clip_gc_values.graphics_exposures = False;
-  clip_gc_valuemask = GCGraphicsExposures;
-  copy_clipmask_gc = XCreateGC(display, pix[PIX_BACK]->clip_mask,
-                              clip_gc_valuemask, &clip_gc_values);
-
-  /* create only those clipping Pixmaps we really need */
-  for (i = 0; tile_needs_clipping[i].start >= 0; i++)
+    EL_SPACESHIP,
+    EL_SPACESHIP_LEFT,         EL_SPACESHIP_RIGHT,
+    EL_SPACESHIP_UP,           EL_SPACESHIP_DOWN
+  },
   {
-    int j;
-
-    for (j = 0; j < tile_needs_clipping[i].count; j++)
-    {
-      int tile = tile_needs_clipping[i].start + j;
-      int graphic = tile;
-      int src_x, src_y;
-      Bitmap *src_bitmap;
-      Pixmap src_pixmap;
-
-      getGraphicSource(graphic, &src_bitmap, &src_x, &src_y);
-      src_pixmap = src_bitmap->clip_mask;
-
-      tile_clipmask[tile] = XCreatePixmap(display, window->drawable,
-                                         TILEX, TILEY, 1);
-
-      XCopyArea(display, src_pixmap, tile_clipmask[tile], copy_clipmask_gc,
-               src_x, src_y, TILEX, TILEY, 0, 0);
-    }
-  }
-
-  XFreeGC(display, copy_clipmask_gc);
-#endif
-
-#endif /* TARGET_X11_NATIVE */
-#endif /* TARGET_X11 */
-#endif
-}
-
-void FreeTileClipmasks()
-{
-#if 0
-#if defined(TARGET_X11)
-  int i;
-
-  for (i = 0; i < NUM_TILES; i++)
+    EL_BD_BUTTERFLY,
+    EL_BD_BUTTERFLY_LEFT,      EL_BD_BUTTERFLY_RIGHT,
+    EL_BD_BUTTERFLY_UP,                EL_BD_BUTTERFLY_DOWN
+  },
   {
-    if (tile_clipmask[i] != None)
-    {
-      XFreePixmap(display, tile_clipmask[i]);
-      tile_clipmask[i] = None;
-    }
-  }
-
-  if (tile_clip_gc)
-    XFreeGC(display, tile_clip_gc);
-  tile_clip_gc = None;
-
-#if 0
-  for (i = 0; i < NUM_BITMAPS; i++)
+    EL_BD_FIREFLY,
+    EL_BD_FIREFLY_LEFT,                EL_BD_FIREFLY_RIGHT,
+    EL_BD_FIREFLY_UP,          EL_BD_FIREFLY_DOWN
+  },
   {
-    if (pix[i] != NULL && pix[i]->stored_clip_gc)
-    {
-      XFreeGC(display, pix[i]->stored_clip_gc);
-      pix[i]->stored_clip_gc = None;
-    }
+    EL_PACMAN,
+    EL_PACMAN_LEFT,            EL_PACMAN_RIGHT,
+    EL_PACMAN_UP,              EL_PACMAN_DOWN
+  },
+  {
+    EL_MOLE,
+    EL_MOLE_LEFT,              EL_MOLE_RIGHT,
+    EL_MOLE_UP,                        EL_MOLE_DOWN
+  },
+  {
+    -1,
+    -1, -1, -1, -1
   }
-#endif
-
-#endif /* TARGET_X11 */
-#endif
-}
+};
 
 void FreeGadgets()
 {
@@ -239,6 +102,11 @@ void InitGadgets()
   gadgets_initialized = TRUE;
 }
 
+inline void InitElementSmallImagesScaledUp(int graphic)
+{
+  CreateImageWithSmallImages(graphic, graphic_info[graphic].scale_up_factor);
+}
+
 void InitElementSmallImages()
 {
   struct PropertyMapping *property_mapping = getImageListPropertyMapping();
@@ -247,18 +115,26 @@ void InitElementSmallImages()
 
   /* initialize normal images from static configuration */
   for (i = 0; element_to_graphic[i].element > -1; i++)
-    CreateImageWithSmallImages(element_to_graphic[i].graphic);
+    InitElementSmallImagesScaledUp(element_to_graphic[i].graphic);
 
   /* initialize special images from static configuration */
   for (i = 0; element_to_special_graphic[i].element > -1; i++)
-    CreateImageWithSmallImages(element_to_special_graphic[i].graphic);
+    InitElementSmallImagesScaledUp(element_to_special_graphic[i].graphic);
 
-  /* initialize images from dynamic configuration */
+  /* initialize images from dynamic configuration (may be elements or other) */
   for (i = 0; i < num_property_mappings; i++)
-    if (property_mapping[i].artwork_index < MAX_NUM_ELEMENTS)
-      CreateImageWithSmallImages(property_mapping[i].artwork_index);
+    InitElementSmallImagesScaledUp(property_mapping[i].artwork_index);
 }
 
+#if 1
+/* !!! FIX THIS (CHANGE TO USING NORMAL ELEMENT GRAPHIC DEFINITIONS) !!! */
+void SetBitmaps_EM(Bitmap **em_bitmap)
+{
+  em_bitmap[0] = graphic_info[IMG_EMC_OBJECT].bitmap;
+  em_bitmap[1] = graphic_info[IMG_EMC_SPRITE].bitmap;
+}
+#endif
+
 static int getFontBitmapID(int font_nr)
 {
   int special = -1;
@@ -294,13 +170,8 @@ void InitFontGraphicInfo()
   /* ---------- initialize font graphic definitions ---------- */
 
   /* always start with reliable default values (normal font graphics) */
-#if 1
   for (i = 0; i < NUM_FONTS; i++)
     font_info[i].graphic = IMG_FONT_INITIAL_1;
-#else
-  for (i = 0; i < NUM_FONTS; i++)
-    font_info[i].graphic = FONT_INITIAL_1;
-#endif
 
   /* initialize normal font/graphic mapping from static configuration */
   for (i = 0; font_to_graphic[i].font_nr > -1; i++)
@@ -328,12 +199,25 @@ void InitFontGraphicInfo()
   /* initialize special font/graphic mapping from static configuration */
   for (i = 0; font_to_graphic[i].font_nr > -1; i++)
   {
-    int font_nr = font_to_graphic[i].font_nr;
-    int special = font_to_graphic[i].special;
-    int graphic = font_to_graphic[i].graphic;
+    int font_nr      = font_to_graphic[i].font_nr;
+    int special      = font_to_graphic[i].special;
+    int graphic      = font_to_graphic[i].graphic;
+    int base_graphic = font2baseimg(font_nr);
 
     if (special >= 0 && special < NUM_SPECIAL_GFX_ARGS)
     {
+      boolean base_redefined =
+       getImageListEntryFromImageID(base_graphic)->redefined;
+      boolean special_redefined =
+       getImageListEntryFromImageID(graphic)->redefined;
+
+      /* if the base font ("font.title_1", for example) has been redefined,
+        but not the special font ("font.title_1.LEVELS", for example), do not
+        use an existing (in this case considered obsolete) special font
+        anymore, but use the automatically determined default font */
+      if (base_redefined && !special_redefined)
+       continue;
+
       font_info[font_nr].special_graphic[special] = graphic;
       font_info[font_nr].special_bitmap_id[special] = num_font_bitmaps;
       num_font_bitmaps++;
@@ -440,15 +324,18 @@ void InitElementGraphicInfo()
     int direction    = element_to_graphic[i].direction;
     boolean crumbled = element_to_graphic[i].crumbled;
     int graphic      = element_to_graphic[i].graphic;
+    int base_graphic = el2baseimg(element);
 
     if (graphic_info[graphic].bitmap == NULL)
       continue;
 
     if ((action > -1 || direction > -1 || crumbled == TRUE) &&
-       el2img(element) != -1)
+       base_graphic != -1)
     {
-      boolean base_redefined = getImageListEntry(el2img(element))->redefined;
-      boolean act_dir_redefined = getImageListEntry(graphic)->redefined;
+      boolean base_redefined =
+       getImageListEntryFromImageID(base_graphic)->redefined;
+      boolean act_dir_redefined =
+       getImageListEntryFromImageID(graphic)->redefined;
 
       /* if the base graphic ("emerald", for example) has been redefined,
         but not the action graphic ("emerald.falling", for example), do not
@@ -560,6 +447,10 @@ void InitElementGraphicInfo()
   }
 
 #if 1
+  /* set hardcoded definitions for some runtime elements without graphic */
+  element_info[EL_AMOEBA_TO_DIAMOND].graphic[ACTION_DEFAULT] = IMG_AMOEBA_DEAD;
+#endif
+
   /* now set all undefined/invalid graphics to -1 to set to default after it */
   for (i = 0; i < MAX_NUM_ELEMENTS; i++)
   {
@@ -587,7 +478,65 @@ void InitElementGraphicInfo()
       }
     }
   }
-#endif
+
+  /* adjust graphics with 2nd tile for movement according to direction
+     (do this before correcting '-1' values to minimize calculations) */
+  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
+  {
+    for (act = 0; act < NUM_ACTIONS; act++)
+    {
+      for (dir = 0; dir < NUM_DIRECTIONS; dir++)
+      {
+       int graphic = element_info[i].direction_graphic[act][dir];
+       int move_dir = (act == ACTION_FALLING ? MV_BIT_DOWN : dir);
+
+       if (act == ACTION_FALLING)      /* special case */
+         graphic = element_info[i].graphic[act];
+
+       if (graphic != -1 &&
+           graphic_info[graphic].double_movement &&
+           graphic_info[graphic].swap_double_tiles != 0)
+       {
+         struct GraphicInfo *g = &graphic_info[graphic];
+         int src_x_front = g->src_x;
+         int src_y_front = g->src_y;
+         int src_x_back = g->src_x + g->offset2_x;
+         int src_y_back = g->src_y + g->offset2_y;
+         boolean frames_are_ordered_diagonally = (g->offset_x != 0 &&
+                                                  g->offset_y != 0);
+         boolean front_is_left_or_upper = (src_x_front < src_x_back ||
+                                           src_y_front < src_y_back);
+         boolean swap_movement_tiles_always = (g->swap_double_tiles == 1);
+         boolean swap_movement_tiles_autodetected =
+           (!frames_are_ordered_diagonally &&
+            ((move_dir == MV_BIT_LEFT  && !front_is_left_or_upper) ||
+             (move_dir == MV_BIT_UP    && !front_is_left_or_upper) ||
+             (move_dir == MV_BIT_RIGHT &&  front_is_left_or_upper) ||
+             (move_dir == MV_BIT_DOWN  &&  front_is_left_or_upper)));
+         Bitmap *dummy;
+
+         /* swap frontside and backside graphic tile coordinates, if needed */
+         if (swap_movement_tiles_always || swap_movement_tiles_autodetected)
+         {
+           /* get current (wrong) backside tile coordinates */
+           getGraphicSourceExt(graphic, 0, &dummy, &src_x_back, &src_y_back,
+                               TRUE);
+
+           /* set frontside tile coordinates to backside tile coordinates */
+           g->src_x = src_x_back;
+           g->src_y = src_y_back;
+
+           /* invert tile offset to point to new backside tile coordinates */
+           g->offset2_x *= -1;
+           g->offset2_y *= -1;
+
+           /* do not swap front and backside tiles again after correction */
+           g->swap_double_tiles = 0;
+         }
+       }
+      }
+    }
+  }
 
   /* now set all '-1' values to element specific default values */
   for (i = 0; i < MAX_NUM_ELEMENTS; i++)
@@ -599,8 +548,14 @@ void InitElementGraphicInfo()
 
     if (default_graphic == -1)
       default_graphic = IMG_UNKNOWN;
+#if 1
+    if (default_crumbled == -1)
+      default_crumbled = default_graphic;
+#else
+    /* !!! THIS LOOKS CRAPPY FOR SAND ETC. WITHOUT CRUMBLED GRAPHICS !!! */
     if (default_crumbled == -1)
       default_crumbled = IMG_EMPTY;
+#endif
 
     for (dir = 0; dir < NUM_DIRECTIONS; dir++)
     {
@@ -611,8 +566,14 @@ void InitElementGraphicInfo()
 
       if (default_direction_graphic[dir] == -1)
        default_direction_graphic[dir] = default_graphic;
+#if 1
+      if (default_direction_crumbled[dir] == -1)
+       default_direction_crumbled[dir] = default_direction_graphic[dir];
+#else
+      /* !!! THIS LOOKS CRAPPY FOR SAND ETC. WITHOUT CRUMBLED GRAPHICS !!! */
       if (default_direction_crumbled[dir] == -1)
        default_direction_crumbled[dir] = default_crumbled;
+#endif
     }
 
     for (act = 0; act < NUM_ACTIONS; act++)
@@ -628,6 +589,10 @@ void InitElementGraphicInfo()
       /* generic default action graphic (defined by "[default]" directive) */
       int default_action_graphic = element_info[EL_DEFAULT].graphic[act];
       int default_action_crumbled = element_info[EL_DEFAULT].crumbled[act];
+      int default_remove_graphic = IMG_EMPTY;
+
+      if (act_remove && default_action_graphic != -1)
+       default_remove_graphic = default_action_graphic;
 
       /* look for special default action graphic (classic game specific) */
       if (IS_BD_ELEMENT(i) && element_info[EL_BD_DEFAULT].graphic[act] != -1)
@@ -645,6 +610,7 @@ void InitElementGraphicInfo()
        default_action_crumbled = element_info[EL_SB_DEFAULT].crumbled[act];
 
 #if 1
+      /* !!! needed because EL_EMPTY_SPACE treated as IS_SP_ELEMENT !!! */
       /* !!! make this better !!! */
       if (i == EL_EMPTY_SPACE)
       {
@@ -655,31 +621,50 @@ void InitElementGraphicInfo()
 
       if (default_action_graphic == -1)
        default_action_graphic = default_graphic;
+#if 1
+      if (default_action_crumbled == -1)
+       default_action_crumbled = default_action_graphic;
+#else
+      /* !!! THIS LOOKS CRAPPY FOR SAND ETC. WITHOUT CRUMBLED GRAPHICS !!! */
       if (default_action_crumbled == -1)
        default_action_crumbled = default_crumbled;
+#endif
 
       for (dir = 0; dir < NUM_DIRECTIONS; dir++)
       {
+       /* use action graphic as the default direction graphic, if undefined */
        int default_action_direction_graphic = element_info[i].graphic[act];
        int default_action_direction_crumbled = element_info[i].crumbled[act];
 
        /* no graphic for current action -- use default direction graphic */
        if (default_action_direction_graphic == -1)
          default_action_direction_graphic =
-           (act_remove ? IMG_EMPTY :
+           (act_remove ? default_remove_graphic :
             act_turning ?
             element_info[i].direction_graphic[ACTION_TURNING][dir] :
+            default_action_graphic != default_graphic ?
+            default_action_graphic :
             default_direction_graphic[dir]);
+
+       if (element_info[i].direction_graphic[act][dir] == -1)
+         element_info[i].direction_graphic[act][dir] =
+           default_action_direction_graphic;
+
+#if 1
+       if (default_action_direction_crumbled == -1)
+         default_action_direction_crumbled =
+           element_info[i].direction_graphic[act][dir];
+#else
        if (default_action_direction_crumbled == -1)
          default_action_direction_crumbled =
-           (act_remove ? IMG_EMPTY :
+           (act_remove ? default_remove_graphic :
             act_turning ?
             element_info[i].direction_crumbled[ACTION_TURNING][dir] :
+            default_action_crumbled != default_crumbled ?
+            default_action_crumbled :
             default_direction_crumbled[dir]);
+#endif
 
-       if (element_info[i].direction_graphic[act][dir] == -1)
-         element_info[i].direction_graphic[act][dir] =
-           default_action_direction_graphic;
        if (element_info[i].direction_crumbled[act][dir] == -1)
          element_info[i].direction_crumbled[act][dir] =
            default_action_direction_crumbled;
@@ -688,18 +673,22 @@ void InitElementGraphicInfo()
       /* no graphic for this specific action -- use default action graphic */
       if (element_info[i].graphic[act] == -1)
        element_info[i].graphic[act] =
-         (act_remove ? IMG_EMPTY :
+         (act_remove ? default_remove_graphic :
           act_turning ? element_info[i].graphic[ACTION_TURNING] :
           default_action_graphic);
+#if 1
+      if (element_info[i].crumbled[act] == -1)
+       element_info[i].crumbled[act] = element_info[i].graphic[act];
+#else
       if (element_info[i].crumbled[act] == -1)
        element_info[i].crumbled[act] =
-         (act_remove ? IMG_EMPTY :
+         (act_remove ? default_remove_graphic :
           act_turning ? element_info[i].crumbled[ACTION_TURNING] :
           default_action_crumbled);
+#endif
     }
   }
 
-#if 1
   /* set animation mode to "none" for each graphic with only 1 frame */
   for (i = 0; i < MAX_NUM_ELEMENTS; i++)
   {
@@ -725,7 +714,6 @@ void InitElementGraphicInfo()
       }
     }
   }
-#endif
 
 #if 0
 #if DEBUG
@@ -759,8 +747,11 @@ void InitElementSpecialGraphicInfo()
     int element = element_to_special_graphic[i].element;
     int special = element_to_special_graphic[i].special;
     int graphic = element_to_special_graphic[i].graphic;
-    boolean base_redefined = getImageListEntry(el2img(element))->redefined;
-    boolean special_redefined = getImageListEntry(graphic)->redefined;
+    int base_graphic = el2baseimg(element);
+    boolean base_redefined =
+      getImageListEntryFromImageID(base_graphic)->redefined;
+    boolean special_redefined =
+      getImageListEntryFromImageID(graphic)->redefined;
 
     /* if the base graphic ("emerald", for example) has been redefined,
        but not the special graphic ("emerald.EDITOR", for example), do not
@@ -786,35 +777,82 @@ void InitElementSpecialGraphicInfo()
       element_info[element].special_graphic[special] = graphic;
   }
 
-#if 1
   /* now set all undefined/invalid graphics to default */
   for (i = 0; i < MAX_NUM_ELEMENTS; i++)
     for (j = 0; j < NUM_SPECIAL_GFX_ARGS; j++)
       if (graphic_info[element_info[i].special_graphic[j]].bitmap == NULL)
        element_info[i].special_graphic[j] =
          element_info[i].graphic[ACTION_DEFAULT];
-#endif
 }
 
 static int get_element_from_token(char *token)
 {
   int i;
+  int x = 0;
 
   for (i = 0; i < MAX_NUM_ELEMENTS; i++)
     if (strcmp(element_info[i].token_name, token) == 0)
       return i;
 
+#if 1
+  for (i = 0; image_config[i].token != NULL; i++)
+  {
+    int len_config_value = strlen(image_config[i].value);
+
+    if (strcmp(&image_config[i].value[len_config_value - 4], ".pcx") != 0 &&
+       strcmp(&image_config[i].value[len_config_value - 4], ".wav") != 0 &&
+       strcmp(image_config[i].value, UNDEFINED_FILENAME) != 0)
+      continue;
+
+    if (strcmp(image_config[i].token, token) == 0)
+      return x;
+
+    x++;
+  }
+#endif
+
   return -1;
 }
 
-static void set_graphic_parameters(int graphic, char **parameter_raw)
+static int get_scaled_graphic_width(int graphic)
+{
+  int original_width = getOriginalImageWidthFromImageID(graphic);
+  int scale_up_factor = graphic_info[graphic].scale_up_factor;
+
+  return original_width * scale_up_factor;
+}
+
+static int get_scaled_graphic_height(int graphic)
+{
+  int original_height = getOriginalImageHeightFromImageID(graphic);
+  int scale_up_factor = graphic_info[graphic].scale_up_factor;
+
+  return original_height * scale_up_factor;
+}
+
+static void set_graphic_parameters(int graphic, int graphic_copy_from)
 {
-  Bitmap *src_bitmap = getBitmapFromImageID(graphic);
+  struct FileInfo *image = getImageListEntryFromImageID(graphic_copy_from);
+  char **parameter_raw = image->parameter;
+  Bitmap *src_bitmap = getBitmapFromImageID(graphic_copy_from);
   int parameter[NUM_GFX_ARGS];
   int anim_frames_per_row = 1, anim_frames_per_col = 1;
   int anim_frames_per_line = 1;
   int i;
 
+#if 1
+  if (graphic != graphic_copy_from)
+  {
+    graphic_info[graphic] = graphic_info[graphic_copy_from];
+
+    return;
+  }
+#endif
+
+  /* if fallback to default artwork is done, also use the default parameters */
+  if (image->fallback_to_default)
+    parameter_raw = image->default_parameter;
+
   /* get integer values from string parameters */
   for (i = 0; i < NUM_GFX_ARGS; i++)
   {
@@ -829,15 +867,22 @@ static void set_graphic_parameters(int graphic, char **parameter_raw)
   graphic_info[graphic].bitmap = src_bitmap;
 
   /* start with reliable default values */
+  graphic_info[graphic].src_image_width = 0;
+  graphic_info[graphic].src_image_height = 0;
   graphic_info[graphic].src_x = 0;
   graphic_info[graphic].src_y = 0;
   graphic_info[graphic].width = TILEX;
   graphic_info[graphic].height = TILEY;
   graphic_info[graphic].offset_x = 0;  /* one or both of these values ... */
   graphic_info[graphic].offset_y = 0;  /* ... will be corrected later */
+  graphic_info[graphic].offset2_x = 0; /* one or both of these values ... */
+  graphic_info[graphic].offset2_y = 0; /* ... will be corrected later */
+  graphic_info[graphic].swap_double_tiles = -1;        /* auto-detect tile swapping */
   graphic_info[graphic].crumbled_like = -1;    /* do not use clone element */
   graphic_info[graphic].diggable_like = -1;    /* do not use clone element */
   graphic_info[graphic].border_size = TILEX / 8;  /* "CRUMBLED" border size */
+  graphic_info[graphic].scale_up_factor = 1;   /* default: no scaling up */
+  graphic_info[graphic].clone_from = -1;       /* do not use clone graphic */
   graphic_info[graphic].anim_delay_fixed = 0;
   graphic_info[graphic].anim_delay_random = 0;
   graphic_info[graphic].post_delay_fixed = 0;
@@ -861,10 +906,23 @@ static void set_graphic_parameters(int graphic, char **parameter_raw)
   if (parameter[GFX_ARG_HEIGHT] != ARG_UNDEFINED_VALUE)
     graphic_info[graphic].height = parameter[GFX_ARG_HEIGHT];
 
+  /* optional zoom factor for scaling up the image to a larger size */
+  if (parameter[GFX_ARG_SCALE_UP_FACTOR] != ARG_UNDEFINED_VALUE)
+    graphic_info[graphic].scale_up_factor = parameter[GFX_ARG_SCALE_UP_FACTOR];
+  if (graphic_info[graphic].scale_up_factor < 1)
+    graphic_info[graphic].scale_up_factor = 1;         /* no scaling */
+
   if (src_bitmap)
   {
-    anim_frames_per_row = src_bitmap->width  / graphic_info[graphic].width;
-    anim_frames_per_col = src_bitmap->height / graphic_info[graphic].height;
+    /* get final bitmap size (with scaling, but without small images) */
+    int src_image_width  = get_scaled_graphic_width(graphic);
+    int src_image_height = get_scaled_graphic_height(graphic);
+
+    anim_frames_per_row = src_image_width  / graphic_info[graphic].width;
+    anim_frames_per_col = src_image_height / graphic_info[graphic].height;
+
+    graphic_info[graphic].src_image_width  = src_image_width;
+    graphic_info[graphic].src_image_height = src_image_height;
   }
 
   /* correct x or y offset dependent of vertical or horizontal frame order */
@@ -889,6 +947,32 @@ static void set_graphic_parameters(int graphic, char **parameter_raw)
   if (parameter[GFX_ARG_YOFFSET] != ARG_UNDEFINED_VALUE)
     graphic_info[graphic].offset_y = parameter[GFX_ARG_YOFFSET];
 
+  /* optionally, moving animations may have separate start and end graphics */
+  graphic_info[graphic].double_movement = parameter[GFX_ARG_2ND_MOVEMENT_TILE];
+
+  if (parameter[GFX_ARG_2ND_VERTICAL] == ARG_UNDEFINED_VALUE)
+    parameter[GFX_ARG_2ND_VERTICAL] = !parameter[GFX_ARG_VERTICAL];
+
+  /* correct x or y offset2 dependent of vertical or horizontal frame order */
+  if (parameter[GFX_ARG_2ND_VERTICAL]) /* frames are ordered vertically */
+    graphic_info[graphic].offset2_y =
+      (parameter[GFX_ARG_2ND_OFFSET] != ARG_UNDEFINED_VALUE ?
+       parameter[GFX_ARG_2ND_OFFSET] : graphic_info[graphic].height);
+  else                                 /* frames are ordered horizontally */
+    graphic_info[graphic].offset2_x =
+      (parameter[GFX_ARG_2ND_OFFSET] != ARG_UNDEFINED_VALUE ?
+       parameter[GFX_ARG_2ND_OFFSET] : graphic_info[graphic].width);
+
+  /* optionally, the x and y offset of 2nd graphic can be specified directly */
+  if (parameter[GFX_ARG_2ND_XOFFSET] != ARG_UNDEFINED_VALUE)
+    graphic_info[graphic].offset2_x = parameter[GFX_ARG_2ND_XOFFSET];
+  if (parameter[GFX_ARG_2ND_YOFFSET] != ARG_UNDEFINED_VALUE)
+    graphic_info[graphic].offset2_y = parameter[GFX_ARG_2ND_YOFFSET];
+
+  /* optionally, the second movement tile can be specified as start tile */
+  if (parameter[GFX_ARG_2ND_SWAP_TILES] != ARG_UNDEFINED_VALUE)
+    graphic_info[graphic].swap_double_tiles= parameter[GFX_ARG_2ND_SWAP_TILES];
+
   /* automatically determine correct number of frames, if not defined */
   if (parameter[GFX_ARG_FRAMES] != ARG_UNDEFINED_VALUE)
     graphic_info[graphic].anim_frames = parameter[GFX_ARG_FRAMES];
@@ -961,13 +1045,31 @@ static void set_graphic_parameters(int graphic, char **parameter_raw)
 
   /* this is only used for drawing envelope graphics */
   graphic_info[graphic].draw_masked = parameter[GFX_ARG_DRAW_MASKED];
+
+#if 1
+  /* optional graphic for cloning all graphics settings */
+  if (parameter[GFX_ARG_CLONE_FROM] != ARG_UNDEFINED_VALUE)
+    graphic_info[graphic].clone_from = parameter[GFX_ARG_CLONE_FROM];
+#else
+  /* optional graphic for cloning all graphics settings */
+  if (parameter[GFX_ARG_CLONE_FROM] != ARG_UNDEFINED_VALUE)
+  {
+    if (parameter[GFX_ARG_CLONE_FROM] != -1)
+    {
+      int clone_graphic = parameter[GFX_ARG_CLONE_FROM];
+
+      graphic_info[graphic] = graphic_info[clone_graphic];
+      graphic_info[graphic].clone_from = clone_graphic;
+
+      printf("::: %d -> %d\n", graphic, clone_graphic);
+    }
+  }
+#endif
 }
 
 static void InitGraphicInfo()
 {
   int fallback_graphic = IMG_CHAR_EXCLAM;
-  struct FileInfo *fallback_image = getImageListEntry(fallback_graphic);
-  Bitmap *fallback_bitmap = getBitmapFromImageID(fallback_graphic);
   int num_images = getImageListSize();
   int i;
 
@@ -983,10 +1085,6 @@ static void InitGraphicInfo()
 
   graphic_info = checked_calloc(num_images * sizeof(struct GraphicInfo));
 
-#if 0
-  printf("::: graphic_info: %d entries\n", num_images);
-#endif
-
 #if defined(TARGET_X11_NATIVE_PERFORMANCE_WORKAROUND)
   if (clipmasks_initialized)
   {
@@ -1003,47 +1101,113 @@ static void InitGraphicInfo()
   }
 #endif
 
+#if 1
+  /* first set all graphic paramaters ... */
+  for (i = 0; i < num_images; i++)
+  {
+    set_graphic_parameters(i, i);
+  }
+
+  /* ... then copy these parameters for cloned graphics */
+  for (i = 0; i < num_images; i++)
+  {
+    if (graphic_info[i].clone_from != -1)
+    {
+      int clone_graphic = graphic_info[i].clone_from;
+
+      if (graphic_info[clone_graphic].clone_from != -1)
+      {
+       Error(ERR_RETURN_LINE, "-");
+       Error(ERR_RETURN, "warning: error found in config file:");
+       Error(ERR_RETURN, "- config file: '%s'", getImageConfigFilename());
+       Error(ERR_RETURN, "- config token: '%s'", getTokenFromImageID(i));
+       Error(ERR_RETURN,
+             "error: cannot clone from already cloned graphic '%s'",
+             getTokenFromImageID(clone_graphic));
+       Error(ERR_RETURN, "custom graphic rejected for this element/action");
+
+       if (i == fallback_graphic)
+         Error(ERR_EXIT, "fatal error: no fallback graphic available");
+
+       Error(ERR_RETURN, "fallback done to 'char_exclam' for this graphic");
+       Error(ERR_RETURN_LINE, "-");
+
+       set_graphic_parameters(i, fallback_graphic);
+      }
+      else
+      {
+       graphic_info[i] = graphic_info[clone_graphic];
+       graphic_info[i].clone_from = clone_graphic;
+
+#if 0
+       printf("::: graphic %d ['%s'] is cloned from %d ['%s']\n",
+              i, getTokenFromImageID(i),
+              clone_graphic, getTokenFromImageID(clone_graphic));
+#endif
+      }
+    }
+  }
+#endif
+
   for (i = 0; i < num_images; i++)
   {
-    struct FileInfo *image = getImageListEntry(i);
     Bitmap *src_bitmap;
     int src_x, src_y;
     int first_frame, last_frame;
+    int src_bitmap_width, src_bitmap_height;
 
 #if 0
-    printf("::: image: '%s' [%d]\n", image->token, i);
+    printf("::: image # %d: '%s' ['%s']\n",
+          i, image->token, getTokenFromImageID(i));
 #endif
 
 #if 0
-    printf("::: image # %d: '%s' ['%s']\n",
-          i, image->token,
-          getTokenFromImageID(i));
+    set_graphic_parameters(i, i);
 #endif
 
-    set_graphic_parameters(i, image->parameter);
-
     /* now check if no animation frames are outside of the loaded image */
 
+#if 0
+    if (graphic_info[i].bitmap == NULL)
+      Error(ERR_WARN, "no bitmap for graphic %d ['%s']",
+           i, getTokenFromImageID(i));
+#endif
+
     if (graphic_info[i].bitmap == NULL)
       continue;                /* skip check for optional images that are undefined */
 
+#if 1
+    /* get final bitmap size (with scaling, but without small images) */
+    src_bitmap_width  = graphic_info[i].src_image_width;
+    src_bitmap_height = graphic_info[i].src_image_height;
+#else
+    /* get final bitmap size (with scaling, but without small images) */
+    src_bitmap_width  = get_scaled_graphic_width(i);
+    src_bitmap_height = get_scaled_graphic_height(i);
+
+    if (graphic_info[i].clone_from != -1)
+    {
+      int clone_graphic = graphic_info[i].clone_from;
+
+      src_bitmap_width  = get_scaled_graphic_width(clone_graphic);
+      src_bitmap_height = get_scaled_graphic_height(clone_graphic);
+    }
+#endif
+
     first_frame = 0;
     getGraphicSource(i, first_frame, &src_bitmap, &src_x, &src_y);
     if (src_x < 0 || src_y < 0 ||
-       src_x + TILEX > src_bitmap->width ||
-       src_y + TILEY > src_bitmap->height)
+       src_x + TILEX > src_bitmap_width ||
+       src_y + TILEY > src_bitmap_height)
     {
       Error(ERR_RETURN_LINE, "-");
       Error(ERR_RETURN, "warning: error found in config file:");
-      Error(ERR_RETURN, "- config file: '%s'",
-           getImageConfigFilename());
-      Error(ERR_RETURN, "- config token: '%s'",
-           getTokenFromImageID(i));
-      Error(ERR_RETURN, "- image file: '%s'",
-           src_bitmap->source_filename);
+      Error(ERR_RETURN, "- config file: '%s'", getImageConfigFilename());
+      Error(ERR_RETURN, "- config token: '%s'", getTokenFromImageID(i));
+      Error(ERR_RETURN, "- image file: '%s'", src_bitmap->source_filename);
       Error(ERR_RETURN,
-           "error: first animation frame out of bounds (%d, %d)",
-           src_x, src_y);
+           "error: first animation frame out of bounds (%d, %d) [%d, %d]",
+           src_x, src_y, src_bitmap_width, src_bitmap_height);
       Error(ERR_RETURN, "custom graphic rejected for this element/action");
 
       if (i == fallback_graphic)
@@ -1052,27 +1216,23 @@ static void InitGraphicInfo()
       Error(ERR_RETURN, "fallback done to 'char_exclam' for this graphic");
       Error(ERR_RETURN_LINE, "-");
 
-      set_graphic_parameters(i, fallback_image->default_parameter);
-      graphic_info[i].bitmap = fallback_bitmap;
+      set_graphic_parameters(i, fallback_graphic);
     }
 
     last_frame = graphic_info[i].anim_frames - 1;
     getGraphicSource(i, last_frame, &src_bitmap, &src_x, &src_y);
     if (src_x < 0 || src_y < 0 ||
-       src_x + TILEX > src_bitmap->width ||
-       src_y + TILEY > src_bitmap->height)
+       src_x + TILEX > src_bitmap_width ||
+       src_y + TILEY > src_bitmap_height)
     {
       Error(ERR_RETURN_LINE, "-");
       Error(ERR_RETURN, "warning: error found in config file:");
-      Error(ERR_RETURN, "- config file: '%s'",
-           getImageConfigFilename());
-      Error(ERR_RETURN, "- config token: '%s'",
-           getTokenFromImageID(i));
-      Error(ERR_RETURN, "- image file: '%s'",
-           src_bitmap->source_filename);
+      Error(ERR_RETURN, "- config file: '%s'", getImageConfigFilename());
+      Error(ERR_RETURN, "- config token: '%s'", getTokenFromImageID(i));
+      Error(ERR_RETURN, "- image file: '%s'", src_bitmap->source_filename);
       Error(ERR_RETURN,
-           "error: last animation frame (%d) out of bounds (%d, %d)",
-           last_frame, src_x, src_y);
+           "error: last animation frame (%d) out of bounds (%d, %d) [%d, %d]",
+           last_frame, src_x, src_y, src_bitmap_width, src_bitmap_height);
       Error(ERR_RETURN, "custom graphic rejected for this element/action");
 
       if (i == fallback_graphic)
@@ -1081,12 +1241,11 @@ static void InitGraphicInfo()
       Error(ERR_RETURN, "fallback done to 'char_exclam' for this graphic");
       Error(ERR_RETURN_LINE, "-");
 
-      set_graphic_parameters(i, fallback_image->default_parameter);
-      graphic_info[i].bitmap = fallback_bitmap;
+      set_graphic_parameters(i, fallback_graphic);
     }
 
 #if defined(TARGET_X11_NATIVE_PERFORMANCE_WORKAROUND)
-    /* currently we need only a tile clip mask from the first frame */
+    /* currently we only need a tile clip mask from the first frame */
     getGraphicSource(i, first_frame, &src_bitmap, &src_x, &src_y);
 
     if (copy_clipmask_gc == None)
@@ -1210,11 +1369,26 @@ static void InitElementSoundInfo()
        default_action_sound = element_info[i].sound[ACTION_DEFAULT];
 #endif
 
+#if 1
+      /* !!! needed because EL_EMPTY_SPACE treated as IS_SP_ELEMENT !!! */
+      /* !!! make this better !!! */
+      if (i == EL_EMPTY_SPACE)
+       default_action_sound = element_info[EL_DEFAULT].sound[act];
+#endif
+
       /* no sound for this specific action -- use default action sound */
       if (element_info[i].sound[act] == -1)
        element_info[i].sound[act] = default_action_sound;
     }
   }
+
+  /* copy sound settings to some elements that are only stored in level file
+     in native R'n'D levels, but are used by game engine in native EM levels */
+  for (i = 0; copy_properties[i][0] != -1; i++)
+    for (j = 1; j <= 4; j++)
+      for (act = 0; act < NUM_ACTIONS; act++)
+       element_info[copy_properties[i][j]].sound[act] =
+         element_info[copy_properties[i][0]].sound[act];
 }
 
 static void InitGameModeSoundInfo()
@@ -1243,7 +1417,6 @@ static void InitGameModeSoundInfo()
       menu.sound[i] = menu.sound[GAME_MODE_DEFAULT];
 
 #if 0
-  /* TEST ONLY */
   for (i = 0; i < NUM_SPECIAL_GFX_ARGS; i++)
     if (menu.sound[i] != -1)
       printf("::: menu.sound[%d] == %d\n", i, menu.sound[i]);
@@ -1264,14 +1437,16 @@ static void set_sound_parameters(int sound, char **parameter_raw)
   /* explicit loop mode setting in configuration overrides default value */
   if (parameter[SND_ARG_MODE_LOOP] != ARG_UNDEFINED_VALUE)
     sound_info[sound].loop = parameter[SND_ARG_MODE_LOOP];
+
+  /* sound volume to change the original volume when loading the sound file */
+  sound_info[sound].volume = parameter[SND_ARG_VOLUME];
+
+  /* sound priority to give certain sounds a higher or lower priority */
+  sound_info[sound].volume = parameter[SND_ARG_VOLUME];
 }
 
 static void InitSoundInfo()
 {
-#if 0
-  struct PropertyMapping *property_mapping = getSoundListPropertyMapping();
-  int num_property_mappings = getSoundListPropertyMappingSize();
-#endif
   int *sound_effect_properties;
   int num_sounds = getSoundListSize();
   int i, j;
@@ -1315,11 +1490,6 @@ static void InitSoundInfo()
       }
     }
 
-#if 0
-    if (strcmp(sound->token, "custom_42") == 0)
-      printf("::: '%s' -> %d\n", sound->token, sound_info[i].loop);
-#endif
-
     /* associate elements and some selected sound actions */
 
     for (j = 0; j < MAX_NUM_ELEMENTS; j++)
@@ -1340,65 +1510,10 @@ static void InitSoundInfo()
       }
     }
 
-    set_sound_parameters(i, sound->parameter);
-  }
-
-  free(sound_effect_properties);
-
-#if 0
-  /* !!! now handled in InitElementSoundInfo() !!! */
-  /* initialize element/sound mapping from dynamic configuration */
-  for (i = 0; i < num_property_mappings; i++)
-  {
-    int element   = property_mapping[i].base_index;
-    int action    = property_mapping[i].ext1_index;
-    int sound     = property_mapping[i].artwork_index;
-
-    if (action < 0)
-      action = ACTION_DEFAULT;
-
-    printf("::: %d: %d, %d, %d ['%s']\n",
-          i, element, action, sound, element_info[element].token_name);
-
-    element_info[element].sound[action] = sound;
-  }
-#endif
-
-#if 0
-  /* TEST ONLY */
-  {
-    int element = EL_CUSTOM_11;
-    int j = 0;
-
-    while (element_action_info[j].suffix)
-    {
-      printf("element %d, sound action '%s'  == %d\n",
-            element, element_action_info[j].suffix,
-            element_info[element].sound[j]);
-      j++;
-    }
-  }
-
-  PlaySoundLevelElementAction(0,0, EL_CUSTOM_11, ACTION_PUSHING);
-#endif
-
-#if 0
-  /* TEST ONLY */
-  {
-    int element = EL_SAND;
-    int sound_action = ACTION_DIGGING;
-    int j = 0;
-
-    while (element_action_info[j].suffix)
-    {
-      if (element_action_info[j].value == sound_action)
-       printf("element %d, sound action '%s'  == %d\n",
-              element, element_action_info[j].suffix,
-              element_info[element].sound[sound_action]);
-      j++;
-    }
+    set_sound_parameters(i, sound->parameter);
   }
-#endif
+
+  free(sound_effect_properties);
 }
 
 static void InitGameModeMusicInfo()
@@ -1476,7 +1591,6 @@ static void InitGameModeMusicInfo()
       menu.music[i] = menu.music[GAME_MODE_DEFAULT];
 
 #if 0
-  /* TEST ONLY */
   for (i = 0; i < MAX_LEVELS; i++)
     if (levelset.music[i] != -1)
       printf("::: levelset.music[%d] == %d\n", i, levelset.music[i]);
@@ -1544,9 +1658,11 @@ static void ReinitializeGraphics()
   InitElementGraphicInfo();            /* element game graphic mapping */
   InitElementSpecialGraphicInfo();     /* element special graphic mapping */
 
-  InitElementSmallImages();            /* create editor and preview images */
+  InitElementSmallImages();            /* scale images to all needed sizes */
   InitFontGraphicInfo();               /* initialize text drawing functions */
 
+  InitGraphicInfo_EM();                        /* graphic mapping for EM engine */
+
   SetMainBackgroundImage(IMG_BACKGROUND);
   SetDoorBackgroundImage(IMG_BACKGROUND_DOOR);
 
@@ -1569,90 +1685,127 @@ static void ReinitializeMusic()
   InitGameModeMusicInfo();     /* game mode music mapping */
 }
 
-static int get_special_property_bit(int element, int base_property_bit)
+static int get_special_property_bit(int element, int property_bit_nr)
 {
-  static struct
+  struct PropertyBitInfo
   {
     int element;
     int bit_nr;
-  } pb_can_move_into_acid[] =
-  {
-    /* all element that can move */
-    { EL_BUG,                  0       },
-    { EL_BUG_LEFT,             0       },
-    { EL_BUG_RIGHT,            0       },
-    { EL_BUG_UP,               0       },
-    { EL_BUG_DOWN,             0       },
-    { EL_SPACESHIP,            0       },
-    { EL_SPACESHIP_LEFT,       0       },
-    { EL_SPACESHIP_RIGHT,      0       },
-    { EL_SPACESHIP_UP,         0       },
-    { EL_SPACESHIP_DOWN,       0       },
-    { EL_BD_BUTTERFLY,         1       },
-    { EL_BD_BUTTERFLY_LEFT,    1       },
-    { EL_BD_BUTTERFLY_RIGHT,   1       },
-    { EL_BD_BUTTERFLY_UP,      1       },
-    { EL_BD_BUTTERFLY_DOWN,    1       },
-    { EL_BD_FIREFLY,           1       },
-    { EL_BD_FIREFLY_LEFT,      1       },
-    { EL_BD_FIREFLY_RIGHT,     1       },
-    { EL_BD_FIREFLY_UP,                1       },
-    { EL_BD_FIREFLY_DOWN,      1       },
-    { EL_YAMYAM,               2       },
-    { EL_DARK_YAMYAM,          2       },
-    { EL_ROBOT,                        3       },
-    { EL_PACMAN,               4       },
-    { EL_PACMAN_LEFT,          4       },
-    { EL_PACMAN_RIGHT,         4       },
-    { EL_PACMAN_UP,            4       },
-    { EL_PACMAN_DOWN,          4       },
-    { EL_MOLE,                 4       },
-    { EL_MOLE_LEFT,            4       },
-    { EL_MOLE_RIGHT,           4       },
-    { EL_MOLE_UP,              4       },
-    { EL_MOLE_DOWN,            4       },
-    { EL_PENGUIN,              5       },
-    { EL_PIG,                  6       },
-    { EL_DRAGON,               6       },
-    { EL_SATELLITE,            7       },
-    { EL_SP_SNIKSNAK,          8       },
-    { EL_SP_ELECTRON,          8       },
-    { EL_BALLOON,              9       },
-    { EL_SPRING,               10      },
+  };
+
+  static struct PropertyBitInfo pb_can_move_into_acid[] =
+  {
+    /* the player may be able fall into acid when gravity is activated */
+    { EL_PLAYER_1,             0       },
+    { EL_PLAYER_2,             0       },
+    { EL_PLAYER_3,             0       },
+    { EL_PLAYER_4,             0       },
+    { EL_SP_MURPHY,            0       },
+    { EL_SOKOBAN_FIELD_PLAYER, 0       },
+
+    /* all element that can move may be able to also move into acid */
+    { EL_BUG,                  1       },
+    { EL_BUG_LEFT,             1       },
+    { EL_BUG_RIGHT,            1       },
+    { EL_BUG_UP,               1       },
+    { EL_BUG_DOWN,             1       },
+    { EL_SPACESHIP,            2       },
+    { EL_SPACESHIP_LEFT,       2       },
+    { EL_SPACESHIP_RIGHT,      2       },
+    { EL_SPACESHIP_UP,         2       },
+    { EL_SPACESHIP_DOWN,       2       },
+    { EL_BD_BUTTERFLY,         3       },
+    { EL_BD_BUTTERFLY_LEFT,    3       },
+    { EL_BD_BUTTERFLY_RIGHT,   3       },
+    { EL_BD_BUTTERFLY_UP,      3       },
+    { EL_BD_BUTTERFLY_DOWN,    3       },
+    { EL_BD_FIREFLY,           4       },
+    { EL_BD_FIREFLY_LEFT,      4       },
+    { EL_BD_FIREFLY_RIGHT,     4       },
+    { EL_BD_FIREFLY_UP,                4       },
+    { EL_BD_FIREFLY_DOWN,      4       },
+    { EL_YAMYAM,               5       },
+    { EL_DARK_YAMYAM,          6       },
+    { EL_ROBOT,                        7       },
+    { EL_PACMAN,               8       },
+    { EL_PACMAN_LEFT,          8       },
+    { EL_PACMAN_RIGHT,         8       },
+    { EL_PACMAN_UP,            8       },
+    { EL_PACMAN_DOWN,          8       },
+    { EL_MOLE,                 9       },
+    { EL_MOLE_LEFT,            9       },
+    { EL_MOLE_RIGHT,           9       },
+    { EL_MOLE_UP,              9       },
+    { EL_MOLE_DOWN,            9       },
+    { EL_PENGUIN,              10      },
+    { EL_PIG,                  11      },
+    { EL_DRAGON,               12      },
+    { EL_SATELLITE,            13      },
+    { EL_SP_SNIKSNAK,          14      },
+    { EL_SP_ELECTRON,          15      },
+    { EL_BALLOON,              16      },
+    { EL_SPRING,               17      },
+
+    { -1,                      -1      },
+  };
+
+  static struct PropertyBitInfo pb_dont_collide_with[] =
+  {
+    { EL_SP_SNIKSNAK,          0       },
+    { EL_SP_ELECTRON,          1       },
 
     { -1,                      -1      },
   };
+
+  static struct
+  {
+    int bit_nr;
+    struct PropertyBitInfo *pb_info;
+  } pb_definition[] =
+  {
+    { EP_CAN_MOVE_INTO_ACID,   pb_can_move_into_acid   },
+    { EP_DONT_COLLIDE_WITH,    pb_dont_collide_with    },
+
+    { -1,                      NULL                    },
+  };
+
+  struct PropertyBitInfo *pb_info = NULL;
   int i;
 
-  if (base_property_bit != EP_CAN_MOVE_INTO_ACID)
+  for (i = 0; pb_definition[i].bit_nr != -1; i++)
+    if (pb_definition[i].bit_nr == property_bit_nr)
+      pb_info = pb_definition[i].pb_info;
+
+  if (pb_info == NULL)
     return -1;
 
-  for (i = 0; pb_can_move_into_acid[i].element != -1; i++)
-    if (pb_can_move_into_acid[i].element == element)
-      return pb_can_move_into_acid[i].bit_nr;
+  for (i = 0; pb_info[i].element != -1; i++)
+    if (pb_info[i].element == element)
+      return pb_info[i].bit_nr;
 
   return -1;
 }
 
-void setMoveIntoAcidProperty(struct LevelInfo *level, int element, boolean set)
+void setBitfieldProperty(int *bitfield, int property_bit_nr, int element,
+                        boolean property_value)
 {
-  int bit_nr = get_special_property_bit(element, EP_CAN_MOVE_INTO_ACID);
+  int bit_nr = get_special_property_bit(element, property_bit_nr);
 
   if (bit_nr > -1)
   {
-    level->can_move_into_acid_bits &= ~(1 << bit_nr);
-
-    if (set)
-      level->can_move_into_acid_bits |= (1 << bit_nr);
+    if (property_value)
+      *bitfield |=  (1 << bit_nr);
+    else
+      *bitfield &= ~(1 << bit_nr);
   }
 }
 
-boolean getMoveIntoAcidProperty(struct LevelInfo *level, int element)
+boolean getBitfieldProperty(int *bitfield, int property_bit_nr, int element)
 {
-  int bit_nr = get_special_property_bit(element, EP_CAN_MOVE_INTO_ACID);
+  int bit_nr = get_special_property_bit(element, property_bit_nr);
 
   if (bit_nr > -1)
-    return ((level->can_move_into_acid_bits & (1 << bit_nr)) != 0);
+    return ((*bitfield & (1 << bit_nr)) != 0);
 
   return FALSE;
 }
@@ -1668,12 +1821,15 @@ void InitElementPropertiesStatic()
     EL_TRAP,
     EL_INVISIBLE_SAND,
     EL_INVISIBLE_SAND_ACTIVE,
+    EL_EMC_GRASS,
 
     /* !!! currently not diggable, but handled by 'ep_dont_run_into' !!! */
+    /* (if amoeba can grow into anything diggable, maybe keep these out) */
 #if 0
     EL_LANDMINE,
     EL_TRAP_ACTIVE,
     EL_SP_BUGGY_BASE_ACTIVE,
+    EL_EMC_PLANT,
 #endif
     -1
   };
@@ -1694,6 +1850,10 @@ void InitElementPropertiesStatic()
     EL_EM_KEY_2,
     EL_EM_KEY_3,
     EL_EM_KEY_4,
+    EL_EMC_KEY_5,
+    EL_EMC_KEY_6,
+    EL_EMC_KEY_7,
+    EL_EMC_KEY_8,
     EL_DYNAMITE,
     EL_DYNABOMB_INCREASE_NUMBER,
     EL_DYNABOMB_INCREASE_SIZE,
@@ -1711,6 +1871,8 @@ void InitElementPropertiesStatic()
     EL_ENVELOPE_3,
     EL_ENVELOPE_4,
     EL_SPEED_PILL,
+    EL_EMC_LENSES,
+    EL_EMC_MAGNIFIER,
     -1
   };
 
@@ -1739,6 +1901,7 @@ void InitElementPropertiesStatic()
     EL_LANDMINE,
     EL_TRAP_ACTIVE,
     EL_SP_BUGGY_BASE_ACTIVE,
+    EL_EMC_PLANT,
 #endif
     -1
   };
@@ -1840,6 +2003,14 @@ void InitElementPropertiesStatic()
     EL_EM_GATE_2_GRAY,
     EL_EM_GATE_3_GRAY,
     EL_EM_GATE_4_GRAY,
+    EL_EMC_GATE_5,
+    EL_EMC_GATE_6,
+    EL_EMC_GATE_7,
+    EL_EMC_GATE_8,
+    EL_EMC_GATE_5_GRAY,
+    EL_EMC_GATE_6_GRAY,
+    EL_EMC_GATE_7_GRAY,
+    EL_EMC_GATE_8_GRAY,
     EL_SWITCHGATE_OPEN,
     EL_SWITCHGATE_OPENING,
     EL_SWITCHGATE_CLOSED,
@@ -1904,6 +2075,10 @@ void InitElementPropertiesStatic()
     EL_STEELWALL_SLIPPERY,
     EL_PEARL,
     EL_CRYSTAL,
+    EL_EMC_WALL_SLIPPERY_1,
+    EL_EMC_WALL_SLIPPERY_2,
+    EL_EMC_WALL_SLIPPERY_3,
+    EL_EMC_WALL_SLIPPERY_4,
     -1
   };
 
@@ -1932,6 +2107,7 @@ void InitElementPropertiesStatic()
     EL_SP_ELECTRON,
     EL_BALLOON,
     EL_SPRING,
+    EL_EMC_ANDROID,
     -1
   };
 
@@ -2004,14 +2180,14 @@ void InitElementPropertiesStatic()
     -1
   };
 
-  static int ep_can_explode_by_fire[] =
+  static int ep_explodes_by_fire[] =
   {
-    /* same elements as in 'ep_can_explode_impact' */
+    /* same elements as in 'ep_explodes_impact' */
     EL_BOMB,
     EL_SP_DISK_ORANGE,
     EL_DX_SUPABOMB,
 
-    /* same elements as in 'ep_can_explode_smashed' */
+    /* same elements as in 'ep_explodes_smashed' */
     EL_SATELLITE,
     EL_PIG,
     EL_DRAGON,
@@ -2040,9 +2216,9 @@ void InitElementPropertiesStatic()
     -1
   };
 
-  static int ep_can_explode_smashed[] =
+  static int ep_explodes_smashed[] =
   {
-    /* same elements as in 'ep_can_explode_impact' */
+    /* same elements as in 'ep_explodes_impact' */
     EL_BOMB,
     EL_SP_DISK_ORANGE,
     EL_DX_SUPABOMB,
@@ -2055,7 +2231,7 @@ void InitElementPropertiesStatic()
     -1
   };
 
-  static int ep_can_explode_impact[] =
+  static int ep_explodes_impact[] =
   {
     EL_BOMB,
     EL_SP_DISK_ORANGE,
@@ -2116,6 +2292,14 @@ void InitElementPropertiesStatic()
     EL_EM_GATE_2_GRAY,
     EL_EM_GATE_3_GRAY,
     EL_EM_GATE_4_GRAY,
+    EL_EMC_GATE_5,
+    EL_EMC_GATE_6,
+    EL_EMC_GATE_7,
+    EL_EMC_GATE_8,
+    EL_EMC_GATE_5_GRAY,
+    EL_EMC_GATE_6_GRAY,
+    EL_EMC_GATE_7_GRAY,
+    EL_EMC_GATE_8_GRAY,
     EL_SWITCHGATE_OPEN,
     EL_TIMEGATE_OPEN,
     -1
@@ -2134,6 +2318,14 @@ void InitElementPropertiesStatic()
     EL_SP_GRAVITY_PORT_RIGHT,
     EL_SP_GRAVITY_PORT_UP,
     EL_SP_GRAVITY_PORT_DOWN,
+    EL_SP_GRAVITY_ON_PORT_LEFT,
+    EL_SP_GRAVITY_ON_PORT_RIGHT,
+    EL_SP_GRAVITY_ON_PORT_UP,
+    EL_SP_GRAVITY_ON_PORT_DOWN,
+    EL_SP_GRAVITY_OFF_PORT_LEFT,
+    EL_SP_GRAVITY_OFF_PORT_RIGHT,
+    EL_SP_GRAVITY_OFF_PORT_UP,
+    EL_SP_GRAVITY_OFF_PORT_DOWN,
     -1
   };
 
@@ -2147,7 +2339,7 @@ void InitElementPropertiesStatic()
     -1
   };
 
-  static int ep_can_explode_1x1[] =
+  static int ep_explodes_1x1_old[] =
   {
     -1
   };
@@ -2168,16 +2360,31 @@ void InitElementPropertiesStatic()
     EL_SATELLITE,
     EL_SP_DISK_YELLOW,
     EL_BALLOON,
+    EL_EMC_ANDROID,
     -1
   };
 
-  static int ep_can_explode_dyna[] =
+  static int ep_explodes_cross_old[] =
   {
     -1
   };
 
   static int ep_protected[] =
   {
+    /* same elements as in 'ep_walkable_inside' */
+    EL_TUBE_ANY,
+    EL_TUBE_VERTICAL,
+    EL_TUBE_HORIZONTAL,
+    EL_TUBE_VERTICAL_LEFT,
+    EL_TUBE_VERTICAL_RIGHT,
+    EL_TUBE_HORIZONTAL_UP,
+    EL_TUBE_HORIZONTAL_DOWN,
+    EL_TUBE_LEFT_UP,
+    EL_TUBE_LEFT_DOWN,
+    EL_TUBE_RIGHT_UP,
+    EL_TUBE_RIGHT_DOWN,
+
+    /* same elements as in 'ep_passable_over' */
     EL_EM_GATE_1,
     EL_EM_GATE_2,
     EL_EM_GATE_3,
@@ -2186,8 +2393,108 @@ void InitElementPropertiesStatic()
     EL_EM_GATE_2_GRAY,
     EL_EM_GATE_3_GRAY,
     EL_EM_GATE_4_GRAY,
+    EL_EMC_GATE_5,
+    EL_EMC_GATE_6,
+    EL_EMC_GATE_7,
+    EL_EMC_GATE_8,
+    EL_EMC_GATE_5_GRAY,
+    EL_EMC_GATE_6_GRAY,
+    EL_EMC_GATE_7_GRAY,
+    EL_EMC_GATE_8_GRAY,
     EL_SWITCHGATE_OPEN,
     EL_TIMEGATE_OPEN,
+
+    /* same elements as in 'ep_passable_inside' */
+    EL_SP_PORT_LEFT,
+    EL_SP_PORT_RIGHT,
+    EL_SP_PORT_UP,
+    EL_SP_PORT_DOWN,
+    EL_SP_PORT_HORIZONTAL,
+    EL_SP_PORT_VERTICAL,
+    EL_SP_PORT_ANY,
+    EL_SP_GRAVITY_PORT_LEFT,
+    EL_SP_GRAVITY_PORT_RIGHT,
+    EL_SP_GRAVITY_PORT_UP,
+    EL_SP_GRAVITY_PORT_DOWN,
+    EL_SP_GRAVITY_ON_PORT_LEFT,
+    EL_SP_GRAVITY_ON_PORT_RIGHT,
+    EL_SP_GRAVITY_ON_PORT_UP,
+    EL_SP_GRAVITY_ON_PORT_DOWN,
+    EL_SP_GRAVITY_OFF_PORT_LEFT,
+    EL_SP_GRAVITY_OFF_PORT_RIGHT,
+    EL_SP_GRAVITY_OFF_PORT_UP,
+    EL_SP_GRAVITY_OFF_PORT_DOWN,
+    -1
+  };
+
+  static int ep_throwable[] =
+  {
+    -1
+  };
+
+  static int ep_can_explode[] =
+  {
+    /* same elements as in 'ep_explodes_impact' */
+    EL_BOMB,
+    EL_SP_DISK_ORANGE,
+    EL_DX_SUPABOMB,
+
+    /* same elements as in 'ep_explodes_smashed' */
+    EL_SATELLITE,
+    EL_PIG,
+    EL_DRAGON,
+    EL_MOLE,
+
+    /* elements that can explode by explosion or by dragonfire */
+    EL_DYNAMITE_ACTIVE,
+    EL_DYNAMITE,
+    EL_DYNABOMB_PLAYER_1_ACTIVE,
+    EL_DYNABOMB_PLAYER_2_ACTIVE,
+    EL_DYNABOMB_PLAYER_3_ACTIVE,
+    EL_DYNABOMB_PLAYER_4_ACTIVE,
+    EL_DYNABOMB_INCREASE_NUMBER,
+    EL_DYNABOMB_INCREASE_SIZE,
+    EL_DYNABOMB_INCREASE_POWER,
+    EL_SP_DISK_RED_ACTIVE,
+    EL_BUG,
+    EL_PENGUIN,
+    EL_SP_DISK_RED,
+    EL_SP_DISK_YELLOW,
+    EL_SP_SNIKSNAK,
+    EL_SP_ELECTRON,
+
+    /* elements that can explode only by explosion */
+    EL_BLACK_ORB,
+    -1
+  };
+
+  static int ep_gravity_reachable[] =
+  {
+    EL_SAND,
+    EL_SP_BASE,
+    EL_TRAP,
+    EL_INVISIBLE_SAND,
+    EL_INVISIBLE_SAND_ACTIVE,
+    EL_SP_PORT_LEFT,
+    EL_SP_PORT_RIGHT,
+    EL_SP_PORT_UP,
+    EL_SP_PORT_DOWN,
+    EL_SP_PORT_HORIZONTAL,
+    EL_SP_PORT_VERTICAL,
+    EL_SP_PORT_ANY,
+    EL_SP_GRAVITY_PORT_LEFT,
+    EL_SP_GRAVITY_PORT_RIGHT,
+    EL_SP_GRAVITY_PORT_UP,
+    EL_SP_GRAVITY_PORT_DOWN,
+    EL_SP_GRAVITY_ON_PORT_LEFT,
+    EL_SP_GRAVITY_ON_PORT_RIGHT,
+    EL_SP_GRAVITY_ON_PORT_UP,
+    EL_SP_GRAVITY_ON_PORT_DOWN,
+    EL_SP_GRAVITY_OFF_PORT_LEFT,
+    EL_SP_GRAVITY_OFF_PORT_RIGHT,
+    EL_SP_GRAVITY_OFF_PORT_UP,
+    EL_SP_GRAVITY_OFF_PORT_DOWN,
+    EL_EMC_GRASS,
     -1
   };
 
@@ -2198,6 +2505,8 @@ void InitElementPropertiesStatic()
     EL_PLAYER_3,
     EL_PLAYER_4,
     EL_SP_MURPHY,
+    EL_SOKOBAN_FIELD_PLAYER,
+    EL_TRIGGER_PLAYER,
     -1
   };
 
@@ -2242,6 +2551,7 @@ void InitElementPropertiesStatic()
     EL_BALLOON_SWITCH_ANY,
     EL_LAMP,
     EL_TIME_ORB_FULL,
+    EL_EMC_MAGIC_BALL_SWITCH,
     -1
   };
 
@@ -2259,6 +2569,9 @@ void InitElementPropertiesStatic()
     EL_EXIT_OPEN,
     EL_STEELWALL,
     EL_PLAYER_1,
+    EL_PLAYER_2,
+    EL_PLAYER_3,
+    EL_PLAYER_4,
     EL_BD_FIREFLY,
     EL_BD_FIREFLY_1,
     EL_BD_FIREFLY_2,
@@ -2280,6 +2593,7 @@ void InitElementPropertiesStatic()
     /* should always be valid */
     EL_EMPTY,
 
+    /* standard classic Supaplex elements */
     EL_SP_EMPTY,
     EL_SP_ZONK,
     EL_SP_BASE,
@@ -2321,11 +2635,24 @@ void InitElementPropertiesStatic()
     EL_SP_HARDWARE_BASE_6,
     EL_SP_CHIP_TOP,
     EL_SP_CHIP_BOTTOM,
+
     /* additional elements that appeared in newer Supaplex levels */
     EL_INVISIBLE_WALL,
-    /* more than one murphy in a level results in an inactive clone */
+
+    /* additional gravity port elements (not switching, but setting gravity) */
+    EL_SP_GRAVITY_ON_PORT_LEFT,
+    EL_SP_GRAVITY_ON_PORT_RIGHT,
+    EL_SP_GRAVITY_ON_PORT_UP,
+    EL_SP_GRAVITY_ON_PORT_DOWN,
+    EL_SP_GRAVITY_OFF_PORT_LEFT,
+    EL_SP_GRAVITY_OFF_PORT_RIGHT,
+    EL_SP_GRAVITY_OFF_PORT_UP,
+    EL_SP_GRAVITY_OFF_PORT_DOWN,
+
+    /* more than one Murphy in a level results in an inactive clone */
     EL_SP_MURPHY_CLONE,
-    /* runtime elements*/
+
+    /* runtime Supaplex elements */
     EL_SP_DISK_RED_ACTIVE,
     EL_SP_TERMINAL_ACTIVE,
     EL_SP_BUGGY_BASE_ACTIVATING,
@@ -2342,7 +2669,11 @@ void InitElementPropertiesStatic()
     EL_SOKOBAN_OBJECT,
     EL_SOKOBAN_FIELD_EMPTY,
     EL_SOKOBAN_FIELD_FULL,
+    EL_SOKOBAN_FIELD_PLAYER,
     EL_PLAYER_1,
+    EL_PLAYER_2,
+    EL_PLAYER_3,
+    EL_PLAYER_4,
     EL_INVISIBLE_STEELWALL,
     -1
   };
@@ -2735,6 +3066,14 @@ void InitElementPropertiesStatic()
     EL_EM_GATE_2_GRAY,
     EL_EM_GATE_3_GRAY,
     EL_EM_GATE_4_GRAY,
+    EL_EMC_GATE_5,
+    EL_EMC_GATE_6,
+    EL_EMC_GATE_7,
+    EL_EMC_GATE_8,
+    EL_EMC_GATE_5_GRAY,
+    EL_EMC_GATE_6_GRAY,
+    EL_EMC_GATE_7_GRAY,
+    EL_EMC_GATE_8_GRAY,
     -1
   };
 
@@ -2767,6 +3106,24 @@ void InitElementPropertiesStatic()
     -1
   };
 
+  static int ep_can_turn_each_move[] =
+  {
+    /* !!! do something with this one !!! */
+    -1
+  };
+
+  static int ep_can_grow[] =
+  {
+    EL_BD_AMOEBA,
+    EL_AMOEBA_DROP,
+    EL_AMOEBA_WET,
+    EL_AMOEBA_DRY,
+    EL_AMOEBA_FULL,
+    EL_GAME_OF_LIFE,
+    EL_BIOMAZE,
+    -1
+  };
+
   static int ep_active_bomb[] =
   {
     EL_DYNAMITE_ACTIVE,
@@ -2798,6 +3155,10 @@ void InitElementPropertiesStatic()
     EL_EM_KEY_2,
     EL_EM_KEY_3,
     EL_EM_KEY_4,
+    EL_EMC_KEY_5,
+    EL_EMC_KEY_6,
+    EL_EMC_KEY_7,
+    EL_EMC_KEY_8,
     EL_GATE_1,
     EL_GATE_2,
     EL_GATE_3,
@@ -2814,6 +3175,14 @@ void InitElementPropertiesStatic()
     EL_EM_GATE_2_GRAY,
     EL_EM_GATE_3_GRAY,
     EL_EM_GATE_4_GRAY,
+    EL_EMC_GATE_5,
+    EL_EMC_GATE_6,
+    EL_EMC_GATE_7,
+    EL_EMC_GATE_8,
+    EL_EMC_GATE_5_GRAY,
+    EL_EMC_GATE_6_GRAY,
+    EL_EMC_GATE_7_GRAY,
+    EL_EMC_GATE_8_GRAY,
     EL_DYNAMITE,
     EL_INVISIBLE_STEELWALL,
     EL_INVISIBLE_WALL,
@@ -2878,6 +3247,14 @@ void InitElementPropertiesStatic()
     EL_SP_HARDWARE_BASE_4,
     EL_SP_HARDWARE_BASE_5,
     EL_SP_HARDWARE_BASE_6,
+    EL_SP_GRAVITY_ON_PORT_LEFT,
+    EL_SP_GRAVITY_ON_PORT_RIGHT,
+    EL_SP_GRAVITY_ON_PORT_UP,
+    EL_SP_GRAVITY_ON_PORT_DOWN,
+    EL_SP_GRAVITY_OFF_PORT_LEFT,
+    EL_SP_GRAVITY_OFF_PORT_RIGHT,
+    EL_SP_GRAVITY_OFF_PORT_UP,
+    EL_SP_GRAVITY_OFF_PORT_DOWN,
     EL_CONVEYOR_BELT_1_SWITCH_LEFT,
     EL_CONVEYOR_BELT_1_SWITCH_MIDDLE,
     EL_CONVEYOR_BELT_1_SWITCH_RIGHT,
@@ -2907,6 +3284,10 @@ void InitElementPropertiesStatic()
     EL_EMC_STEELWALL_2,
     EL_EMC_STEELWALL_3,
     EL_EMC_STEELWALL_4,
+    EL_EMC_WALL_SLIPPERY_1,
+    EL_EMC_WALL_SLIPPERY_2,
+    EL_EMC_WALL_SLIPPERY_3,
+    EL_EMC_WALL_SLIPPERY_4,
     EL_EMC_WALL_1,
     EL_EMC_WALL_2,
     EL_EMC_WALL_3,
@@ -2915,6 +3296,14 @@ void InitElementPropertiesStatic()
     EL_EMC_WALL_6,
     EL_EMC_WALL_7,
     EL_EMC_WALL_8,
+    EL_EMC_WALL_9,
+    EL_EMC_WALL_10,
+    EL_EMC_WALL_11,
+    EL_EMC_WALL_12,
+    EL_EMC_WALL_13,
+    EL_EMC_WALL_14,
+    EL_EMC_WALL_15,
+    EL_EMC_WALL_16,
     -1
   };
 
@@ -2951,9 +3340,9 @@ void InitElementPropertiesStatic()
     { ep_can_smash_player,     EP_CAN_SMASH_PLAYER     },
     { ep_can_smash_enemies,    EP_CAN_SMASH_ENEMIES    },
     { ep_can_smash_everything, EP_CAN_SMASH_EVERYTHING },
-    { ep_can_explode_by_fire,  EP_CAN_EXPLODE_BY_FIRE  },
-    { ep_can_explode_smashed,  EP_CAN_EXPLODE_SMASHED  },
-    { ep_can_explode_impact,   EP_CAN_EXPLODE_IMPACT   },
+    { ep_explodes_by_fire,     EP_EXPLODES_BY_FIRE     },
+    { ep_explodes_smashed,     EP_EXPLODES_SMASHED     },
+    { ep_explodes_impact,      EP_EXPLODES_IMPACT      },
     { ep_walkable_over,                EP_WALKABLE_OVER        },
     { ep_walkable_inside,      EP_WALKABLE_INSIDE      },
     { ep_walkable_under,       EP_WALKABLE_UNDER       },
@@ -2961,10 +3350,13 @@ void InitElementPropertiesStatic()
     { ep_passable_inside,      EP_PASSABLE_INSIDE      },
     { ep_passable_under,       EP_PASSABLE_UNDER       },
     { ep_droppable,            EP_DROPPABLE            },
-    { ep_can_explode_1x1,      EP_CAN_EXPLODE_1X1      },
+    { ep_explodes_1x1_old,     EP_EXPLODES_1X1_OLD     },
     { ep_pushable,             EP_PUSHABLE             },
-    { ep_can_explode_dyna,     EP_CAN_EXPLODE_DYNA     },
+    { ep_explodes_cross_old,   EP_EXPLODES_CROSS_OLD   },
     { ep_protected,            EP_PROTECTED            },
+    { ep_throwable,            EP_THROWABLE            },
+    { ep_can_explode,          EP_CAN_EXPLODE          },
+    { ep_gravity_reachable,    EP_GRAVITY_REACHABLE    },
 
     { ep_player,               EP_PLAYER               },
     { ep_can_pass_magic_wall,  EP_CAN_PASS_MAGIC_WALL  },
@@ -2987,6 +3379,8 @@ void InitElementPropertiesStatic()
     { ep_amoeboid,             EP_AMOEBOID             },
     { ep_amoebalive,           EP_AMOEBALIVE           },
     { ep_has_content,          EP_HAS_CONTENT          },
+    { ep_can_turn_each_move,   EP_CAN_TURN_EACH_MOVE   },
+    { ep_can_grow,             EP_CAN_GROW             },
     { ep_active_bomb,          EP_ACTIVE_BOMB          },
     { ep_inactive,             EP_INACTIVE             },
 
@@ -2997,44 +3391,6 @@ void InitElementPropertiesStatic()
     { NULL,                    -1                      }
   };
 
-  static int copy_properties[][5] =
-  {
-    {
-      EL_BUG,
-      EL_BUG_LEFT,             EL_BUG_RIGHT,
-      EL_BUG_UP,               EL_BUG_DOWN
-    },
-    {
-      EL_SPACESHIP,
-      EL_SPACESHIP_LEFT,       EL_SPACESHIP_RIGHT,
-      EL_SPACESHIP_UP,         EL_SPACESHIP_DOWN
-    },
-    {
-      EL_BD_BUTTERFLY,
-      EL_BD_BUTTERFLY_LEFT,    EL_BD_BUTTERFLY_RIGHT,
-      EL_BD_BUTTERFLY_UP,      EL_BD_BUTTERFLY_DOWN
-    },
-    {
-      EL_BD_FIREFLY,
-      EL_BD_FIREFLY_LEFT,      EL_BD_FIREFLY_RIGHT,
-      EL_BD_FIREFLY_UP,                EL_BD_FIREFLY_DOWN
-    },
-    {
-      EL_PACMAN,
-      EL_PACMAN_LEFT,          EL_PACMAN_RIGHT,
-      EL_PACMAN_UP,            EL_PACMAN_DOWN
-    },
-    {
-      EL_MOLE,
-      EL_MOLE_LEFT,            EL_MOLE_RIGHT,
-      EL_MOLE_UP,              EL_MOLE_DOWN
-    },
-    {
-      -1,
-      -1, -1, -1, -1
-    }
-  };
-
   int i, j, k;
 
   /* always start with reliable default values (element has no properties) */
@@ -3058,38 +3414,6 @@ void InitElementPropertiesStatic()
 
 void InitElementPropertiesEngine(int engine_version)
 {
-#if 0
-  static int active_properties[] =
-  {
-    EP_AMOEBALIVE,
-    EP_AMOEBOID,
-    EP_PFORTE,
-    EP_DONT_COLLIDE_WITH,
-    EP_MAUER,
-    EP_CAN_FALL,
-    EP_CAN_SMASH,
-    EP_CAN_PASS_MAGIC_WALL,
-    EP_CAN_MOVE,
-    EP_DONT_TOUCH,
-    EP_DONT_RUN_INTO,
-    EP_GEM,
-    EP_CAN_EXPLODE_BY_FIRE,
-    EP_PUSHABLE,
-    EP_PLAYER,
-    EP_HAS_CONTENT,
-    EP_DIGGABLE,
-    EP_PASSABLE_INSIDE,
-    EP_OVER_PLAYER,
-    EP_ACTIVE_BOMB,
-
-    EP_BELT,
-    EP_BELT_ACTIVE,
-    EP_BELT_SWITCH,
-    EP_WALKABLE_UNDER,
-    EP_EM_SLIPPERY_WALL,
-  };
-#endif
-
   static int no_wall_properties[] =
   {
     EP_DIGGABLE,
@@ -3121,10 +3445,6 @@ void InitElementPropertiesEngine(int engine_version)
 
   int i, j;
 
-#if 0
-  InitElementPropertiesStatic();
-#endif
-
   /* important: after initialization in InitElementPropertiesStatic(), the
      elements are not again initialized to a default value; therefore all
      changes have to make sure that they leave the element with a defined
@@ -3134,11 +3454,6 @@ void InitElementPropertiesEngine(int engine_version)
   /* set all special, combined or engine dependent element properties */
   for (i = 0; i < MAX_NUM_ELEMENTS; i++)
   {
-#if 0
-    for (j = EP_ACCESSIBLE_OVER; j < NUM_ELEMENT_PROPERTIES; j++)
-      SET_PROPERTY(i, j, FALSE);
-#endif
-
     /* ---------- INACTIVE ------------------------------------------------- */
     SET_PROPERTY(i, EP_INACTIVE, (i >= EL_CHAR_START && i <= EL_CHAR_END));
 
@@ -3165,7 +3480,8 @@ void InitElementPropertiesEngine(int engine_version)
 
     /* ---------- COLLECTIBLE ---------------------------------------------- */
     SET_PROPERTY(i, EP_COLLECTIBLE, (IS_COLLECTIBLE_ONLY(i) ||
-                                    IS_DROPPABLE(i)));
+                                    IS_DROPPABLE(i) ||
+                                    IS_THROWABLE(i)));
 
     /* ---------- SNAPPABLE ------------------------------------------------ */
     SET_PROPERTY(i, EP_SNAPPABLE, (IS_DIGGABLE(i) ||
@@ -3192,12 +3508,6 @@ void InitElementPropertiesEngine(int engine_version)
                                             !IS_DIGGABLE(i) &&
                                             !IS_COLLECTIBLE(i)));
 
-#if 1
-    /* ---------- PROTECTED ------------------------------------------------ */
-    if (IS_ACCESSIBLE_INSIDE(i))
-      SET_PROPERTY(i, EP_PROTECTED, TRUE);
-#endif
-
     /* ---------- DRAGONFIRE_PROOF ----------------------------------------- */
 
     if (IS_HISTORIC_SOLID(i) || i == EL_EXPLOSION)
@@ -3212,20 +3522,9 @@ void InitElementPropertiesEngine(int engine_version)
     else if (engine_version < VERSION_IDENT(2,2,0,0))
       SET_PROPERTY(i, EP_EXPLOSION_PROOF, IS_INDESTRUCTIBLE(i));
     else
-#if 1
       SET_PROPERTY(i, EP_EXPLOSION_PROOF, (IS_INDESTRUCTIBLE(i) &&
                                           (!IS_WALKABLE(i) ||
                                            IS_PROTECTED(i))));
-#else
-#if 1
-      SET_PROPERTY(i, EP_EXPLOSION_PROOF, (IS_INDESTRUCTIBLE(i) &&
-                                          !IS_WALKABLE_OVER(i) &&
-                                          !IS_WALKABLE_UNDER(i)));
-#else
-      SET_PROPERTY(i, EP_EXPLOSION_PROOF, (IS_INDESTRUCTIBLE(i) &&
-                                          IS_PROTECTED(i)));
-#endif
-#endif
 
     if (IS_CUSTOM_ELEMENT(i))
     {
@@ -3249,15 +3548,17 @@ void InitElementPropertiesEngine(int engine_version)
                                   CAN_SMASH_ENEMIES(i) ||
                                   CAN_SMASH_EVERYTHING(i)));
 
-    /* ---------- CAN_EXPLODE ---------------------------------------------- */
-    SET_PROPERTY(i, EP_CAN_EXPLODE, (CAN_EXPLODE_BY_FIRE(i) ||
-                                    CAN_EXPLODE_SMASHED(i) ||
-                                    CAN_EXPLODE_IMPACT(i)));
+    /* ---------- CAN_EXPLODE_BY_FIRE -------------------------------------- */
+    SET_PROPERTY(i, EP_CAN_EXPLODE_BY_FIRE, (CAN_EXPLODE(i) &&
+                                            EXPLODES_BY_FIRE(i)));
+
+    /* ---------- CAN_EXPLODE_SMASHED -------------------------------------- */
+    SET_PROPERTY(i, EP_CAN_EXPLODE_SMASHED, (CAN_EXPLODE(i) &&
+                                            EXPLODES_SMASHED(i)));
 
-    /* ---------- CAN_EXPLODE_3X3 ------------------------------------------ */
-    SET_PROPERTY(i, EP_CAN_EXPLODE_3X3, (CAN_EXPLODE(i) &&
-                                        !CAN_EXPLODE_1X1(i) &&
-                                        !CAN_EXPLODE_DYNA(i)));
+    /* ---------- CAN_EXPLODE_IMPACT --------------------------------------- */
+    SET_PROPERTY(i, EP_CAN_EXPLODE_IMPACT, (CAN_EXPLODE(i) &&
+                                           EXPLODES_IMPACT(i)));
 
     /* ---------- CAN_EXPLODE_BY_DRAGONFIRE -------------------------------- */
     SET_PROPERTY(i, EP_CAN_EXPLODE_BY_DRAGONFIRE, CAN_EXPLODE_BY_FIRE(i));
@@ -3267,55 +3568,55 @@ void InitElementPropertiesEngine(int engine_version)
                                                  i == EL_BLACK_ORB));
 
     /* ---------- COULD_MOVE_INTO_ACID ------------------------------------- */
-    SET_PROPERTY(i, EP_COULD_MOVE_INTO_ACID, (CAN_MOVE(i) ||
+    SET_PROPERTY(i, EP_COULD_MOVE_INTO_ACID, (ELEM_IS_PLAYER(i) ||
+                                             CAN_MOVE(i) ||
                                              IS_CUSTOM_ELEMENT(i)));
 
+    /* ---------- MAYBE_DONT_COLLIDE_WITH ---------------------------------- */
+    SET_PROPERTY(i, EP_MAYBE_DONT_COLLIDE_WITH, (i == EL_SP_SNIKSNAK ||
+                                                i == EL_SP_ELECTRON));
+
     /* ---------- CAN_MOVE_INTO_ACID --------------------------------------- */
-    if (!IS_CUSTOM_ELEMENT(i))
-      SET_PROPERTY(i, EP_CAN_MOVE_INTO_ACID,getMoveIntoAcidProperty(&level,i));
+    if (COULD_MOVE_INTO_ACID(i) && !IS_CUSTOM_ELEMENT(i))
+      SET_PROPERTY(i, EP_CAN_MOVE_INTO_ACID,
+                  getMoveIntoAcidProperty(&level, i));
+
+    /* ---------- DONT_COLLIDE_WITH ---------------------------------------- */
+    if (MAYBE_DONT_COLLIDE_WITH(i))
+      SET_PROPERTY(i, EP_DONT_COLLIDE_WITH,
+                  getDontCollideWithProperty(&level, i));
 
     /* ---------- SP_PORT -------------------------------------------------- */
     SET_PROPERTY(i, EP_SP_PORT, (IS_SP_ELEMENT(i) &&
                                 IS_PASSABLE_INSIDE(i)));
 
-#if 0
-    if (i == EL_CUSTOM_START + 253)
-      printf("::: %d, %d, %d -> %d\n",
-            CAN_EXPLODE_1X1(i),
-            CAN_EXPLODE_3X3(i),
-            CAN_EXPLODE_DYNA(i),
-            CAN_EXPLODE(i));
-#endif
-
     /* ---------- CAN_CHANGE ----------------------------------------------- */
     SET_PROPERTY(i, EP_CAN_CHANGE, FALSE);     /* default: cannot change */
     for (j = 0; j < element_info[i].num_change_pages; j++)
       if (element_info[i].change_page[j].can_change)
        SET_PROPERTY(i, EP_CAN_CHANGE, TRUE);
 
+    /* ---------- HAS_ACTION ----------------------------------------------- */
+    SET_PROPERTY(i, EP_HAS_ACTION, FALSE);     /* default: has no action */
+    for (j = 0; j < element_info[i].num_change_pages; j++)
+      if (element_info[i].change_page[j].has_action)
+       SET_PROPERTY(i, EP_HAS_ACTION, TRUE);
+
+    /* ---------- CAN_CHANGE_OR_HAS_ACTION --------------------------------- */
+    SET_PROPERTY(i, EP_CAN_CHANGE_OR_HAS_ACTION, (CAN_CHANGE(i) ||
+                                                 HAS_ACTION(i)));
+
     /* ---------- GFX_CRUMBLED --------------------------------------------- */
+#if 1
+    SET_PROPERTY(i, EP_GFX_CRUMBLED,
+                element_info[i].crumbled[ACTION_DEFAULT] !=
+                element_info[i].graphic[ACTION_DEFAULT]);
+#else
+    /* !!! THIS LOOKS CRAPPY FOR SAND ETC. WITHOUT CRUMBLED GRAPHICS !!! */
     SET_PROPERTY(i, EP_GFX_CRUMBLED,
                 element_info[i].crumbled[ACTION_DEFAULT] != IMG_EMPTY);
-  }
-
-#if 0
-  /* determine inactive elements (used for engine main loop optimization) */
-  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
-  {
-    boolean active = FALSE;
-
-    for (j = 0; i < NUM_ELEMENT_PROPERTIES; j++)
-    {
-      if (HAS_PROPERTY(i, j))
-       active = TRUE;
-    }
-
-#if 0
-    if (!active)
-      SET_PROPERTY(i, EP_INACTIVE, TRUE);
 #endif
   }
-#endif
 
   /* dynamically adjust element properties according to game engine version */
   {
@@ -3341,7 +3642,6 @@ void InitElementPropertiesEngine(int engine_version)
                  engine_version > VERSION_IDENT(2,0,1,0)));
   }
 
-#if 1
   /* set default push delay values (corrected since version 3.0.7-1) */
   if (engine_version < VERSION_IDENT(3,0,7,1))
   {
@@ -3366,7 +3666,7 @@ void InitElementPropertiesEngine(int engine_version)
   }
 
   /* set some other uninitialized values of custom elements in older levels */
-  if (engine_version < VERSION_IDENT(3,0,9,0))
+  if (engine_version < VERSION_IDENT(3,1,0,0))
   {
     for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
     {
@@ -3374,10 +3674,18 @@ void InitElementPropertiesEngine(int engine_version)
 
       element_info[element].access_direction = MV_ALL_DIRECTIONS;
 
-      element_info[element].explosion_delay = 18;
+      element_info[element].explosion_delay = 17;
       element_info[element].ignition_delay = 8;
     }
   }
+
+#if 0
+  /* set element properties that were handled incorrectly in older levels */
+  if (engine_version < VERSION_IDENT(3,1,0,0))
+  {
+    SET_PROPERTY(EL_SP_SNIKSNAK, EP_DONT_COLLIDE_WITH, FALSE);
+    SET_PROPERTY(EL_SP_ELECTRON, EP_DONT_COLLIDE_WITH, FALSE);
+  }
 #endif
 
   /* this is needed because some graphics depend on element properties */
@@ -3387,7 +3695,21 @@ void InitElementPropertiesEngine(int engine_version)
 
 static void InitGlobal()
 {
+  int i;
+
+  for (i = 0; i < MAX_NUM_ELEMENTS + 1; i++)
+  {
+    /* check if element_name_info entry defined for each element in "main.h" */
+    if (i < MAX_NUM_ELEMENTS && element_name_info[i].token_name == NULL)
+      Error(ERR_EXIT, "undefined 'element_name_info' entry for element %d", i);
+
+    element_info[i].token_name = element_name_info[i].token_name;
+    element_info[i].class_name = element_name_info[i].class_name;
+    element_info[i].editor_description=element_name_info[i].editor_description;
+  }
+
   global.autoplay_leveldir = NULL;
+  global.convert_leveldir = NULL;
 
   global.frames_per_second = 0;
   global.fps_slowdown = FALSE;
@@ -3489,7 +3811,7 @@ void Execute_Command(char *command)
   {
     char *filename = &command[11];
 
-    if (access(filename, F_OK) != 0)
+    if (!fileExists(filename))
       Error(ERR_EXIT, "cannot open file '%s'", filename);
 
     LoadLevelFromFilename(&level, filename);
@@ -3501,7 +3823,7 @@ void Execute_Command(char *command)
   {
     char *filename = &command[10];
 
-    if (access(filename, F_OK) != 0)
+    if (!fileExists(filename))
       Error(ERR_EXIT, "cannot open file '%s'", filename);
 
     LoadTapeFromFilename(filename);
@@ -3511,16 +3833,52 @@ void Execute_Command(char *command)
   }
   else if (strncmp(command, "autoplay ", 9) == 0)
   {
-    char *str_copy = getStringCopy(&command[9]);
+    char *str_ptr = getStringCopy(&command[9]);        /* read command parameters */
+
+    while (*str_ptr != '\0')                   /* continue parsing string */
+    {
+      /* cut leading whitespace from string, replace it by string terminator */
+      while (*str_ptr == ' ' || *str_ptr == '\t')
+       *str_ptr++ = '\0';
+
+      if (*str_ptr == '\0')                    /* end of string reached */
+       break;
+
+      if (global.autoplay_leveldir == NULL)    /* read level set string */
+      {
+       global.autoplay_leveldir = str_ptr;
+       global.autoplay_all = TRUE;             /* default: play all tapes */
+
+       for (i = 0; i < MAX_TAPES_PER_SET; i++)
+         global.autoplay_level[i] = FALSE;
+      }
+      else                                     /* read level number string */
+      {
+       int level_nr = atoi(str_ptr);           /* get level_nr value */
+
+       if (level_nr >= 0 && level_nr < MAX_TAPES_PER_SET)
+         global.autoplay_level[level_nr] = TRUE;
+
+       global.autoplay_all = FALSE;
+      }
+
+      /* advance string pointer to the next whitespace (or end of string) */
+      while (*str_ptr != ' ' && *str_ptr != '\t' && *str_ptr != '\0')
+       str_ptr++;
+    }
+  }
+  else if (strncmp(command, "convert ", 8) == 0)
+  {
+    char *str_copy = getStringCopy(&command[8]);
     char *str_ptr = strchr(str_copy, ' ');
 
-    global.autoplay_leveldir = str_copy;
-    global.autoplay_level_nr = -1;
+    global.convert_leveldir = str_copy;
+    global.convert_level_nr = -1;
 
-    if (str_ptr != NULL)
+    if (str_ptr != NULL)                       /* level number follows */
     {
       *str_ptr++ = '\0';                       /* terminate leveldir string */
-      global.autoplay_level_nr = atoi(str_ptr);        /* get level_nr value */
+      global.convert_level_nr = atoi(str_ptr); /* get level_nr value */
     }
   }
   else
@@ -3539,6 +3897,11 @@ static void InitSetup()
     options.verbose = TRUE;
 }
 
+static void InitGameInfo()
+{
+  game.restart_level = FALSE;
+}
+
 static void InitPlayerInfo()
 {
   int i;
@@ -3674,7 +4037,7 @@ static void InitArtworkConfig()
 
   for (i = 0; i < NUM_MUSIC_PREFIXES; i++)
     music_id_prefix[i] = music_prefix_info[i].prefix;
-  music_id_prefix[MAX_LEVELS] = NULL;
+  music_id_prefix[NUM_MUSIC_PREFIXES] = NULL;
 
   for (i = 0; i < NUM_ACTIONS; i++)
     action_id_suffix[i] = element_action_info[i].suffix;
@@ -3775,8 +4138,6 @@ void InitGfx()
   DrawInitText(PROGRAM_COPYRIGHT_STRING, 50, FC_RED);
 
   DrawInitText("Loading graphics:", 120, FC_GREEN);
-
-  InitTileClipmasks();
 }
 
 void InitGfxBackground()
@@ -3813,9 +4174,7 @@ void InitLevelArtworkInfo()
 
 static void InitImages()
 {
-#if 1
   setLevelArtworkDir(artwork.gfx_first);
-#endif
 
 #if 0
   printf("::: InitImages for '%s' ['%s', '%s'] ['%s', '%s']\n",
@@ -3839,10 +4198,8 @@ static void InitSound(char *identifier)
   if (identifier == NULL)
     identifier = artwork.snd_current->identifier;
 
-#if 1
   /* set artwork path to send it to the sound server process */
   setLevelArtworkDir(artwork.snd_first);
-#endif
 
   InitReloadCustomSounds(identifier);
   ReinitializeSounds();
@@ -3853,10 +4210,8 @@ static void InitMusic(char *identifier)
   if (identifier == NULL)
     identifier = artwork.mus_current->identifier;
 
-#if 1
   /* set artwork path to send it to the sound server process */
   setLevelArtworkDir(artwork.mus_first);
-#endif
 
   InitReloadCustomMusic(identifier);
   ReinitializeMusic();
@@ -3864,14 +4219,14 @@ static void InitMusic(char *identifier)
 
 void InitNetworkServer()
 {
-#if defined(PLATFORM_UNIX)
+#if defined(NETWORK_AVALIABLE)
   int nr_wanted;
 #endif
 
   if (!options.network)
     return;
 
-#if defined(PLATFORM_UNIX)
+#if defined(NETWORK_AVALIABLE)
   nr_wanted = Request("Choose player", REQ_PLAYER | REQ_STAY_CLOSED);
 
   if (!ConnectToServer(options.server_host, options.server_port))
@@ -3969,7 +4324,7 @@ static char *getNewArtworkIdentifier(int type)
             artwork_current_identifier) != 0)
     artwork_new_identifier = artwork_current_identifier;
 
-  *(&(ARTWORK_CURRENT_IDENTIFIER(artwork, type))) = artwork_current_identifier;
+  *(ARTWORK_CURRENT_IDENTIFIER_PTR(artwork, type))= artwork_current_identifier;
 
 #if 0
   if (type == ARTWORK_TYPE_GRAPHICS)
@@ -4022,14 +4377,6 @@ void ReloadCustomArtwork(int force_reload)
 
     InitImages();
 
-#if 0
-    printf("... '%s'\n",
-          leveldir_current->graphics_set);
-#endif
-
-    FreeTileClipmasks();
-    InitTileClipmasks();
-
     redraw_screen = TRUE;
   }
 
@@ -4074,7 +4421,7 @@ void KeyboardAutoRepeatOffUnlessAutoplay()
 
 void OpenAll()
 {
-  InitGlobal();                /* initialize some global variables */
+  InitGlobal();                        /* initialize some global variables */
 
   if (options.execute_command)
     Execute_Command(options.execute_command);
@@ -4086,11 +4433,13 @@ void OpenAll()
 #else
     Error(ERR_WARN, "networking only supported in Unix version");
 #endif
-    exit(0);   /* never reached */
+
+    exit(0);                   /* never reached, server loops forever */
   }
 
   InitSetup();
 
+  InitGameInfo();
   InitPlayerInfo();
   InitArtworkInfo();           /* needed before loading gfx, sound & music */
   InitArtworkConfig();         /* needed before forking sound child process */
@@ -4128,9 +4477,18 @@ void OpenAll()
     AutoPlayTape();
     return;
   }
+  else if (global.convert_leveldir)
+  {
+    ConvertLevels();
+    return;
+  }
 
   game_status = GAME_MODE_MAIN;
 
+#if 1
+  em_open_all();
+#endif
+
   DrawMainMenu();
 
   InitNetworkServer();
@@ -4143,8 +4501,16 @@ void CloseAllAndExit(int exit_value)
   FreeAllMusic();
   CloseAudio();                /* called after freeing sounds (needed for SDL) */
 
+#if 1
+  em_close_all();
+#endif
+
   FreeAllImages();
-  FreeTileClipmasks();
+
+#if defined(TARGET_SDL)
+  if (network_server)  /* terminate network server */
+    SDL_KillThread(server_thread);
+#endif
 
   CloseVideoDisplay();
   ClosePlatformDependentStuff();