// ============================================================================
// Rocks'n'Diamonds - McDuffin Strikes Back!
// ----------------------------------------------------------------------------
// (c) 1995-2014 by Artsoft Entertainment
//     		    Holger Schemel
//		    info@artsoft.org
//		    https://www.artsoft.org/
// ----------------------------------------------------------------------------
// init.c
// ============================================================================

#include "libgame/libgame.h"

#include "init.h"
#include "events.h"
#include "screens.h"
#include "editor.h"
#include "game.h"
#include "tape.h"
#include "tools.h"
#include "files.h"
#include "network.h"
#include "netserv.h"
#include "anim.h"
#include "config.h"

#include "conf_e2g.c"	// include auto-generated data structure definitions
#include "conf_esg.c"	// include auto-generated data structure definitions
#include "conf_e2s.c"	// include auto-generated data structure definitions
#include "conf_fnt.c"	// include auto-generated data structure definitions
#include "conf_g2s.c"	// include auto-generated data structure definitions
#include "conf_g2m.c"	// include auto-generated data structure definitions
#include "conf_act.c"	// include auto-generated data structure definitions


#define CONFIG_TOKEN_FONT_INITIAL		"font.initial"
#define CONFIG_TOKEN_GLOBAL_BUSY_INITIAL	"global.busy_initial"
#define CONFIG_TOKEN_GLOBAL_BUSY		"global.busy"
#define CONFIG_TOKEN_GLOBAL_BUSY_PLAYFIELD	"global.busy_playfield"
#define CONFIG_TOKEN_BACKGROUND			"background"
#define CONFIG_TOKEN_BACKGROUND_LOADING_INITIAL	"background.LOADING_INITIAL"
#define CONFIG_TOKEN_BACKGROUND_LOADING		"background.LOADING"

#define INITIAL_IMG_GLOBAL_BUSY_INITIAL		0
#define INITIAL_IMG_GLOBAL_BUSY			1
#define INITIAL_IMG_GLOBAL_BUSY_PLAYFIELD	2

#define NUM_INITIAL_IMAGES_BUSY			3

#define INITIAL_IMG_BACKGROUND			3
#define INITIAL_IMG_BACKGROUND_LOADING_INITIAL	4
#define INITIAL_IMG_BACKGROUND_LOADING		5

#define NUM_INITIAL_IMAGES			6


static struct FontBitmapInfo font_initial[NUM_INITIAL_FONTS];
static struct GraphicInfo   image_initial[NUM_INITIAL_IMAGES];

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_YAMYAM,
    EL_YAMYAM_LEFT,		EL_YAMYAM_RIGHT,
    EL_YAMYAM_UP,		EL_YAMYAM_DOWN
  },
  {
    EL_MOLE,
    EL_MOLE_LEFT,		EL_MOLE_RIGHT,
    EL_MOLE_UP,			EL_MOLE_DOWN
  },
  {
    EL_SPRING,
    EL_SPRING_LEFT,		EL_SPRING_RIGHT,
    EL_SPRING_LEFT,		EL_SPRING_RIGHT,	// (to match array size)
  },
  {
    -1,
    -1, -1, -1, -1
  }
};


// forward declaration for internal use
static int get_graphic_parameter_value(char *, char *, int);


static int getLoadingBackgroundImage(int graphic)
{
  return getImageFromGraphicOrDefault(graphic, INITIAL_IMG_BACKGROUND);
}

static void SetLoadingWindowBackgroundImage(int graphic)
{
  SetBackgroundImage(getLoadingBackgroundImage(graphic), REDRAW_ALL);
}

static void SetLoadingBackgroundImage(void)
{
  struct GraphicInfo *graphic_info_last = graphic_info;
  int background_image = (game_status_last_screen == -1 ?
			  INITIAL_IMG_BACKGROUND_LOADING_INITIAL :
			  INITIAL_IMG_BACKGROUND_LOADING);

  graphic_info = image_initial;

  SetDrawDeactivationMask(REDRAW_NONE);
  SetDrawBackgroundMask(REDRAW_ALL);

  SetLoadingWindowBackgroundImage(background_image);

  graphic_info = graphic_info_last;
}

static void DrawInitAnim(boolean only_when_loading)
{
  struct GraphicInfo *graphic_info_last = graphic_info;
  int graphic = (game_status_last_screen == -1    ? INITIAL_IMG_GLOBAL_BUSY_INITIAL :
		 game_status == GAME_MODE_LOADING ? INITIAL_IMG_GLOBAL_BUSY :
		 INITIAL_IMG_GLOBAL_BUSY_PLAYFIELD);
  struct MenuPosInfo *busy = (game_status_last_screen == -1    ? &init_last.busy_initial :
			      game_status == GAME_MODE_LOADING ? &init_last.busy :
			      &init_last.busy_playfield);
  static DelayCounter action_delay = { 0 };
  int sync_frame = FrameCounter;
  int x, y;

  action_delay.value = GameFrameDelay;

  // prevent OS (Windows) from complaining about program not responding
  CheckQuitEvent();

  if (game_status != GAME_MODE_LOADING && only_when_loading)
    return;

  if (image_initial[graphic].bitmap == NULL || window == NULL)
    return;

  if (!DelayReached(&action_delay))
    return;

  if (busy->x == -1)
    busy->x = (game_status == GAME_MODE_LOADING ? WIN_XSIZE / 2 : SXSIZE / 2);
  if (busy->y == -1)
    busy->y = (game_status == GAME_MODE_LOADING ? WIN_YSIZE / 2 : SYSIZE / 2);

  x = (game_status == GAME_MODE_LOADING ? 0 : SX) + ALIGNED_TEXT_XPOS(busy);
  y = (game_status == GAME_MODE_LOADING ? 0 : SY) + ALIGNED_TEXT_YPOS(busy);

  graphic_info = image_initial;

  if (sync_frame % image_initial[graphic].anim_delay == 0)
  {
    Bitmap *src_bitmap;
    int src_x, src_y;
    int width = graphic_info[graphic].width;
    int height = graphic_info[graphic].height;
    int frame = getGraphicAnimationFrame(graphic, sync_frame);

    ClearRectangleOnBackground(drawto, x, y, width, height);

    getFixedGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
    BlitBitmapMasked(src_bitmap, drawto, src_x, src_y, width, height, x, y);

    BlitBitmap(drawto, window, x, y, width, height, x, y);
  }

  graphic_info = graphic_info_last;

  FrameCounter++;
}

static void DrawProgramInfo(void)
{
  int font1_nr = FC_YELLOW;
  int font2_nr = FC_RED;
  int font2_height = getFontHeight(font2_nr);
  int ypos1 = 20;
  int ypos2 = 50;
  int ypos3 = WIN_YSIZE - 20 - font2_height;

  DrawInitText(getProgramInitString(),				ypos1, font1_nr);
  DrawInitText(setup.internal.text[TEXT_ID_PROGRAM_COPYRIGHT],	ypos2, font2_nr);
  DrawInitText(setup.internal.text[TEXT_ID_PROGRAM_WEBSITE],	ypos3, font2_nr);
}

static void FreeGadgets(void)
{
  FreeLevelEditorGadgets();
  FreeGameButtons();
  FreeTapeButtons();
  FreeToolButtons();
  FreeScreenGadgets();
}

void InitGadgets(void)
{
  static boolean gadgets_initialized = FALSE;

  if (gadgets_initialized)
    FreeGadgets();

  CreateLevelEditorGadgets();
  CreateGameButtons();
  CreateTapeButtons();
  CreateToolButtons();
  CreateScreenGadgets();

  InitGadgetsSoundCallback(PlaySoundActivating, PlaySoundSelecting);

  gadgets_initialized = TRUE;
}

static void InitElementSmallImagesScaledUp(int graphic)
{
  struct GraphicInfo *g = &graphic_info[graphic];

  // if graphic was cloned, scale cloned graphic
  if (graphic_info[graphic].clone_from != -1)
    graphic = graphic_info[graphic].clone_from;

  // create small and game tile sized bitmaps (and scale up, if needed)
  CreateImageWithSmallImages(graphic, g->scale_up_factor, g->tile_size);
}

static void InitElementSmallImages(void)
{
  print_timestamp_init("InitElementSmallImages");

  static int special_graphics[] =
  {
    IMG_FLAMES_1_LEFT,
    IMG_FLAMES_2_LEFT,
    IMG_FLAMES_3_LEFT,
    IMG_FLAMES_1_RIGHT,
    IMG_FLAMES_2_RIGHT,
    IMG_FLAMES_3_RIGHT,
    IMG_FLAMES_1_UP,
    IMG_FLAMES_2_UP,
    IMG_FLAMES_3_UP,
    IMG_FLAMES_1_DOWN,
    IMG_FLAMES_2_DOWN,
    IMG_FLAMES_3_DOWN,
    IMG_EDITOR_ELEMENT_BORDER,
    IMG_EDITOR_ELEMENT_BORDER_INPUT,
    IMG_EDITOR_CASCADE_LIST,
    IMG_EDITOR_CASCADE_LIST_ACTIVE,
    -1
  };
  struct PropertyMapping *property_mapping = getImageListPropertyMapping();
  int num_property_mappings = getImageListPropertyMappingSize();
  int i;

  print_timestamp_time("getImageListPropertyMapping/Size");

  print_timestamp_init("InitElementSmallImagesScaledUp (1)");
  // initialize normal element images from static configuration
  for (i = 0; element_to_graphic[i].element > -1; i++)
    InitElementSmallImagesScaledUp(element_to_graphic[i].graphic);
  print_timestamp_done("InitElementSmallImagesScaledUp (1)");

  // initialize special element images from static configuration
  for (i = 0; element_to_special_graphic[i].element > -1; i++)
    InitElementSmallImagesScaledUp(element_to_special_graphic[i].graphic);
  print_timestamp_time("InitElementSmallImagesScaledUp (2)");

  // initialize element images from dynamic configuration
  for (i = 0; i < num_property_mappings; i++)
    if (property_mapping[i].base_index < MAX_NUM_ELEMENTS)
      InitElementSmallImagesScaledUp(property_mapping[i].artwork_index);
  print_timestamp_time("InitElementSmallImagesScaledUp (3)");

  // initialize special non-element images from above list
  for (i = 0; special_graphics[i] > -1; i++)
    InitElementSmallImagesScaledUp(special_graphics[i]);
  print_timestamp_time("InitElementSmallImagesScaledUp (4)");

  print_timestamp_done("InitElementSmallImages");
}

static void InitScaledImagesScaledUp(int graphic)
{
  struct GraphicInfo *g = &graphic_info[graphic];

  // if graphic was cloned, scale cloned graphic
  if (graphic_info[graphic].clone_from != -1)
    graphic = graphic_info[graphic].clone_from;

  ScaleImage(graphic, g->scale_up_factor);
}

static void InitScaledImages(void)
{
  struct PropertyMapping *property_mapping = getImageListPropertyMapping();
  int num_property_mappings = getImageListPropertyMappingSize();
  int i;

  // scale normal images from static configuration, if not already scaled
  for (i = 0; i < NUM_IMAGE_FILES; i++)
    InitScaledImagesScaledUp(i);

  // scale images from dynamic configuration, if not already scaled
  for (i = 0; i < num_property_mappings; i++)
    InitScaledImagesScaledUp(property_mapping[i].artwork_index);
}

static void InitBitmapPointers(void)
{
  int num_images = getImageListSize();
  int i;

  // standard size bitmap may have changed -- update default bitmap pointer
  for (i = 0; i < num_images; i++)
    if (graphic_info[i].bitmaps)
      graphic_info[i].bitmap = graphic_info[i].bitmaps[IMG_BITMAP_STANDARD];
}

static boolean hasColorTemplate(int graphic)
{
  // if graphic was cloned, only re-color cloned graphic
  if (graphic_info[graphic].clone_from != -1)
    return FALSE;

  return graphic_info[graphic].color_template;
}

boolean anyImagehasColorTemplate(void)
{
  int num_images = getImageListSize();
  int i;

  for (i = 0; i < num_images; i++)
    if (hasColorTemplate(i))
      return TRUE;

  return FALSE;
}

void InitColorTemplateImages(void)
{
  int num_images = getImageListSize();
  int i;

  // if graphic is marked as "color template", reset using colored bitmaps
  for (i = 0; i < num_images; i++)
    if (hasColorTemplate(i))
      ResetColorTemplateImage(i);

  // if graphic is marked as "color template", re-color all scaled bitmaps
  for (i = 0; i < num_images; i++)
    if (hasColorTemplate(i))
      CreateImgesFromColorTemplate(i, GetColoredBitmapFromTemplate_BD);

  InitImageTextures();

  game.InitColorTemplateImagesNeeded = FALSE;
}

void InitColorTemplateImagesIfNeeded(void)
{
  gfx.has_reduced_color_template = TRUE;
  gfx.has_extended_color_template = FALSE;

  game.InitColorTemplateImagesNeeded = FALSE;

  if (program.headless)
    return;

  if (!anyImagehasColorTemplate())
    return;

  game.InitColorTemplateImagesNeeded = TRUE;

  // if game still playing, init color template images later
  if (game_status == GAME_MODE_PLAYING)
    return;

  InitColorTemplateImages();
}

void InitImageTextures(void)
{
  static int texture_graphics[] =
  {
    IMG_GFX_REQUEST_BUTTON_TOUCH_YES,
    IMG_GFX_REQUEST_BUTTON_TOUCH_NO,
    IMG_GFX_REQUEST_BUTTON_TOUCH_CONFIRM,
    IMG_GFX_GAME_BUTTON_TOUCH_STOP,
    IMG_GFX_GAME_BUTTON_TOUCH_PAUSE,
    IMG_MENU_BUTTON_TOUCH_BACK,
    IMG_MENU_BUTTON_TOUCH_NEXT,
    IMG_MENU_BUTTON_TOUCH_BACK2,
    IMG_MENU_BUTTON_TOUCH_NEXT2,
    -1
  };
  int i, j, k;

  FreeAllImageTextures();

  for (i = IMG_GLOBAL_BORDER_FIRST; i <= IMG_GLOBAL_BORDER_LAST; i++)
    CreateImageTextures(i);

  for (i = 0; i < MAX_NUM_TOONS; i++)
    CreateImageTextures(IMG_TOON_1 + i);

  for (i = 0; i < NUM_GLOBAL_ANIMS; i++)
  {
    for (j = 0; j < NUM_GLOBAL_ANIM_PARTS_ALL; j++)
    {
      for (k = 0; k < NUM_SPECIAL_GFX_ARGS; k++)
      {
	int graphic = global_anim_info[i].graphic[j][k];

	if (graphic == IMG_UNDEFINED)
	  continue;

	CreateImageTextures(graphic);
      }
    }
  }

  for (i = 0; texture_graphics[i] > -1; i++)
    CreateImageTextures(texture_graphics[i]);
}

void FreeAllTextures(void)
{
  FreeAllImageTextures();
  FreeTileCursorTextures();
  FreeEnvelopeRequestTextures();
}

static int getFontSpecialSuffix(void)
{
  int special = -1;

  // (special case: do not use special font for GAME_MODE_LOADING)
  if (game_status >= GAME_MODE_TITLE_INITIAL &&
      game_status <= GAME_MODE_PSEUDO_PREVIEW)
    special = game_status;
  else if (game_status == GAME_MODE_PSEUDO_TYPENAME)
    special = GFX_SPECIAL_ARG_MAIN;
  else if (game_status == GAME_MODE_PSEUDO_TYPENAMES)
    special = GFX_SPECIAL_ARG_NAMES;

  return special;
}

static int getFontBitmapID(int font_nr)
{
  int special = getFontSpecialSuffix();

  if (special != -1)
    return font_info[font_nr].special_bitmap_id[special];
  else
    return font_nr;
}

static int getFontFromToken(char *token)
{
  char *value = getHashEntry(font_token_hash, token);

  if (value != NULL)
    return atoi(value);

  // if font not found, use reliable default value
  return FONT_INITIAL_1;
}

static char *getTokenFromFont(int font_nr)
{
  static char *token = NULL;
  int special = getFontSpecialSuffix();

  checked_free(token);

  if (special != -1)
    token = getStringCat2(font_info[font_nr].token_name, special_suffix_info[special].suffix);
  else
    token = getStringCopy(font_info[font_nr].token_name);

  return token;
}

static void InitFontGraphicInfo(void)
{
  static struct FontBitmapInfo *font_bitmap_info = NULL;
  struct PropertyMapping *property_mapping = getImageListPropertyMapping();
  int num_property_mappings = getImageListPropertyMappingSize();
  int num_font_bitmaps = NUM_FONTS;
  int i, j;

  if (graphic_info == NULL)		// still at startup phase
  {
    InitFontInfo(font_initial, NUM_INITIAL_FONTS, FALSE,
		 getFontBitmapID, getFontFromToken, getTokenFromFont);

    return;
  }

  // ---------- initialize font graphic definitions ----------

  // always start with reliable default values (normal font graphics)
  for (i = 0; i < NUM_FONTS; i++)
    font_info[i].graphic = IMG_FONT_INITIAL_1;

  // initialize normal 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;

    if (special != -1)
      continue;

    font_info[font_nr].graphic = graphic;
  }

  // always start with reliable default values (special font graphics)
  for (i = 0; i < NUM_FONTS; i++)
  {
    for (j = 0; j < NUM_SPECIAL_GFX_ARGS; j++)
    {
      font_info[i].special_graphic[j] = font_info[i].graphic;
      font_info[i].special_bitmap_id[j] = i;
    }
  }

  // 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 base_graphic = font2baseimg(font_nr);

    if (IS_SPECIAL_GFX_ARG(special))
    {
      boolean base_redefined = getImageListEntryFromImageID(base_graphic)->redefined;
      boolean special_redefined = getImageListEntryFromImageID(graphic)->redefined;
      boolean special_cloned = (graphic_info[graphic].clone_from != -1);

      /* 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 */
      /* special case: cloned special fonts must be explicitly redefined,
	 but are not automatically redefined by redefining base font */
      if (base_redefined && !special_redefined && !special_cloned)
	continue;

      font_info[font_nr].special_graphic[special] = graphic;
      font_info[font_nr].special_bitmap_id[special] = num_font_bitmaps;

      num_font_bitmaps++;
    }
  }

  // initialize special font/graphic mapping from dynamic configuration
  for (i = 0; i < num_property_mappings; i++)
  {
    int font_nr = property_mapping[i].base_index - MAX_NUM_ELEMENTS;
    int special = property_mapping[i].ext3_index;
    int graphic = property_mapping[i].artwork_index;

    if (font_nr < 0 || font_nr >= NUM_FONTS)
      continue;

    if (IS_SPECIAL_GFX_ARG(special))
    {
      font_info[font_nr].special_graphic[special] = graphic;
      font_info[font_nr].special_bitmap_id[special] = num_font_bitmaps;

      num_font_bitmaps++;
    }
  }

  /* correct special font/graphic mapping for cloned fonts for downwards
     compatibility of PREVIEW fonts -- this is only needed for implicit
     redefinition of special font by redefined base font, and only if other
     fonts are cloned from this special font (like in the "Zelda" level set) */
  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;

    if (IS_SPECIAL_GFX_ARG(special))
    {
      boolean special_redefined = getImageListEntryFromImageID(graphic)->redefined;
      boolean special_cloned = (graphic_info[graphic].clone_from != -1);

      if (special_cloned && !special_redefined)
      {
	int j;

	for (j = 0; font_to_graphic[j].font_nr > -1; j++)
	{
	  int font_nr2 = font_to_graphic[j].font_nr;
	  int special2 = font_to_graphic[j].special;
	  int graphic2 = font_to_graphic[j].graphic;

	  if (IS_SPECIAL_GFX_ARG(special2) && graphic2 == graphic_info[graphic].clone_from)
	  {
	    font_info[font_nr].special_graphic[special] =
	      font_info[font_nr2].special_graphic[special2];
	    font_info[font_nr].special_bitmap_id[special] =
	      font_info[font_nr2].special_bitmap_id[special2];
	  }
	}
      }
    }
  }

  // reset non-redefined ".active" font graphics if normal font is redefined
  // (this different treatment is needed because normal and active fonts are
  // independently defined ("active" is not a property of font definitions!)
  for (i = 0; i < NUM_FONTS; i++)
  {
    int font_nr_base = i;
    int font_nr_active = FONT_ACTIVE(font_nr_base);

    // check only those fonts with exist as normal and ".active" variant
    if (font_nr_base != font_nr_active)
    {
      int base_graphic = font_info[font_nr_base].graphic;
      int active_graphic = font_info[font_nr_active].graphic;
      boolean base_redefined = getImageListEntryFromImageID(base_graphic)->redefined;
      boolean active_redefined = getImageListEntryFromImageID(active_graphic)->redefined;

      /* if the base font ("font.menu_1", for example) has been redefined,
	 but not the active font ("font.menu_1.active", for example), do not
	 use an existing (in this case considered obsolete) active font
	 anymore, but use the automatically determined default font */
      if (base_redefined && !active_redefined)
	font_info[font_nr_active].graphic = base_graphic;

      // now also check each "special" font (which may be the same as above)
      for (j = 0; j < NUM_SPECIAL_GFX_ARGS; j++)
      {
	int base_graphic = font_info[font_nr_base].special_graphic[j];
	int active_graphic = font_info[font_nr_active].special_graphic[j];
	boolean base_redefined = getImageListEntryFromImageID(base_graphic)->redefined;
	boolean active_redefined = getImageListEntryFromImageID(active_graphic)->redefined;

	// same as above, but check special graphic definitions, for example:
	// redefined "font.menu_1.MAIN" invalidates "font.menu_1.active.MAIN"
	if (base_redefined && !active_redefined)
	{
	  font_info[font_nr_active].special_graphic[j] =
	    font_info[font_nr_base].special_graphic[j];
	  font_info[font_nr_active].special_bitmap_id[j] =
	    font_info[font_nr_base].special_bitmap_id[j];
	}
      }
    }
  }

  // ---------- initialize font bitmap array ----------

  if (font_bitmap_info != NULL)
    FreeFontInfo(font_bitmap_info);

  font_bitmap_info =
    checked_calloc(num_font_bitmaps * sizeof(struct FontBitmapInfo));

  // ---------- initialize font bitmap definitions ----------

  for (i = 0; i < NUM_FONTS; i++)
  {
    if (i < NUM_INITIAL_FONTS)
    {
      font_bitmap_info[i] = font_initial[i];

      continue;
    }

    for (j = 0; j < NUM_SPECIAL_GFX_ARGS; j++)
    {
      int font_bitmap_id = font_info[i].special_bitmap_id[j];
      int graphic = font_info[i].special_graphic[j];

      // set 'graphic_info' for font entries, if uninitialized (guessed)
      if (graphic_info[graphic].anim_frames < MIN_NUM_CHARS_PER_FONT)
      {
	graphic_info[graphic].anim_frames = DEFAULT_NUM_CHARS_PER_FONT;
	graphic_info[graphic].anim_frames_per_line = DEFAULT_NUM_CHARS_PER_LINE;
      }

      // copy font relevant information from graphics information
      font_bitmap_info[font_bitmap_id].bitmap             = graphic_info[graphic].bitmap;
      font_bitmap_info[font_bitmap_id].src_x              = graphic_info[graphic].src_x;
      font_bitmap_info[font_bitmap_id].src_y              = graphic_info[graphic].src_y;
      font_bitmap_info[font_bitmap_id].width              = graphic_info[graphic].width;
      font_bitmap_info[font_bitmap_id].height             = graphic_info[graphic].height;

      font_bitmap_info[font_bitmap_id].offset_x           = graphic_info[graphic].offset_x;
      font_bitmap_info[font_bitmap_id].offset_y           = graphic_info[graphic].offset_y;

      font_bitmap_info[font_bitmap_id].draw_xoffset       = graphic_info[graphic].draw_xoffset;
      font_bitmap_info[font_bitmap_id].draw_yoffset       = graphic_info[graphic].draw_yoffset;

      font_bitmap_info[font_bitmap_id].num_chars          = graphic_info[graphic].anim_frames;
      font_bitmap_info[font_bitmap_id].num_chars_per_line = graphic_info[graphic].anim_frames_per_line;

      font_bitmap_info[font_bitmap_id].uppercase_only     = graphic_info[graphic].uppercase_only;
    }
  }

  InitFontInfo(font_bitmap_info, num_font_bitmaps, global.uppercase_only,
	       getFontBitmapID, getFontFromToken, getTokenFromFont);
}

static void InitGlobalAnimGraphicInfo(void)
{
  struct PropertyMapping *property_mapping = getImageListPropertyMapping();
  int num_property_mappings = getImageListPropertyMappingSize();
  int i, j, k;

  if (graphic_info == NULL)		// still at startup phase
    return;

  // always start with reliable default values (no global animations)
  for (i = 0; i < NUM_GLOBAL_ANIM_TOKENS; i++)
    for (j = 0; j < NUM_GLOBAL_ANIM_PARTS_ALL; j++)
      for (k = 0; k < NUM_SPECIAL_GFX_ARGS; k++)
	global_anim_info[i].graphic[j][k] = IMG_UNDEFINED;

  // initialize global animation definitions from static configuration
  for (i = 0; i < NUM_GLOBAL_ANIM_TOKENS; i++)
  {
    int j = GLOBAL_ANIM_ID_PART_BASE;
    int k = GFX_SPECIAL_ARG_DEFAULT;

    global_anim_info[i].graphic[j][k] = IMG_GFX_GLOBAL_ANIM_1 + i;
  }

  // initialize global animation definitions from dynamic configuration
  for (i = 0; i < num_property_mappings; i++)
  {
    int anim_nr = property_mapping[i].base_index - MAX_NUM_ELEMENTS - NUM_FONTS;
    int part_nr = property_mapping[i].ext1_index - ACTION_PART_1;
    int special = property_mapping[i].ext3_index;
    int graphic = property_mapping[i].artwork_index;

    if (anim_nr < 0 || anim_nr >= NUM_GLOBAL_ANIM_TOKENS)
      continue;

    // set animation part to base part, if not specified
    if (!IS_GLOBAL_ANIM_PART(part_nr))
      part_nr = GLOBAL_ANIM_ID_PART_BASE;

    // set animation screen to default, if not specified
    if (!IS_SPECIAL_GFX_ARG(special))
      special = GFX_SPECIAL_ARG_DEFAULT;

    global_anim_info[anim_nr].graphic[part_nr][special] = graphic;

    // fix default value for ".draw_masked" (for backward compatibility)
    struct GraphicInfo *g = &graphic_info[graphic];
    struct FileInfo *image = getImageListEntryFromImageID(graphic);
    char **parameter_raw = image->parameter;
    int p = GFX_ARG_DRAW_MASKED;
    int draw_masked = get_graphic_parameter_value(parameter_raw[p],
						  image_config_suffix[p].token,
						  image_config_suffix[p].type);

    // if ".draw_masked" parameter is undefined, use default value "TRUE"
    if (draw_masked == ARG_UNDEFINED_VALUE)
      g->draw_masked = TRUE;
  }

#if 0
  for (i = 0; i < NUM_GLOBAL_ANIMS; i++)
    for (j = 0; j < NUM_GLOBAL_ANIM_PARTS_ALL; j++)
      for (k = 0; k < NUM_SPECIAL_GFX_ARGS; k++)
	if (global_anim_info[i].graphic[j][k] != IMG_UNDEFINED &&
	    graphic_info[global_anim_info[i].graphic[j][k]].bitmap != NULL)
	  Debug("init:InitGlobalAnimGraphicInfo",
		"anim %d, part %d, mode %d => %d",
		i, j, k, global_anim_info[i].graphic[j][k]);
#endif
}

static void InitGlobalAnimSoundInfo(void)
{
  struct PropertyMapping *property_mapping = getSoundListPropertyMapping();
  int num_property_mappings = getSoundListPropertyMappingSize();
  int i, j, k;

  // always start with reliable default values (no global animation sounds)
  for (i = 0; i < NUM_GLOBAL_ANIM_TOKENS; i++)
    for (j = 0; j < NUM_GLOBAL_ANIM_PARTS_ALL; j++)
      for (k = 0; k < NUM_SPECIAL_GFX_ARGS; k++)
	global_anim_info[i].sound[j][k] = SND_UNDEFINED;

  // initialize global animation sound definitions from dynamic configuration
  for (i = 0; i < num_property_mappings; i++)
  {
    int anim_nr = property_mapping[i].base_index - 2 * MAX_NUM_ELEMENTS;
    int part_nr = property_mapping[i].ext1_index - ACTION_PART_1;
    int special = property_mapping[i].ext3_index;
    int sound   = property_mapping[i].artwork_index;

    // sound uses control definition; map it to position of graphic (artwork)
    anim_nr -= GLOBAL_ANIM_ID_CONTROL_FIRST;

    if (anim_nr < 0 || anim_nr >= NUM_GLOBAL_ANIM_TOKENS)
      continue;

    // set animation part to base part, if not specified
    if (!IS_GLOBAL_ANIM_PART(part_nr))
      part_nr = GLOBAL_ANIM_ID_PART_BASE;

    // set animation screen to default, if not specified
    if (!IS_SPECIAL_GFX_ARG(special))
      special = GFX_SPECIAL_ARG_DEFAULT;

    global_anim_info[anim_nr].sound[part_nr][special] = sound;
  }

#if 0
  for (i = 0; i < NUM_GLOBAL_ANIMS; i++)
    for (j = 0; j < NUM_GLOBAL_ANIM_PARTS_ALL; j++)
      for (k = 0; k < NUM_SPECIAL_GFX_ARGS; k++)
	if (global_anim_info[i].sound[j][k] != SND_UNDEFINED)
	  Debug("init:InitGlobalAnimSoundInfo",
		"anim %d, part %d, mode %d => %d",
		i, j, k, global_anim_info[i].sound[j][k]);
#endif
}

static void InitGlobalAnimMusicInfo(void)
{
  struct PropertyMapping *property_mapping = getMusicListPropertyMapping();
  int num_property_mappings = getMusicListPropertyMappingSize();
  int i, j, k;

  // always start with reliable default values (no global animation music)
  for (i = 0; i < NUM_GLOBAL_ANIM_TOKENS; i++)
    for (j = 0; j < NUM_GLOBAL_ANIM_PARTS_ALL; j++)
      for (k = 0; k < NUM_SPECIAL_GFX_ARGS; k++)
	global_anim_info[i].music[j][k] = MUS_UNDEFINED;

  // initialize global animation music definitions from dynamic configuration
  for (i = 0; i < num_property_mappings; i++)
  {
    int anim_nr = property_mapping[i].base_index - NUM_MUSIC_PREFIXES;
    int part_nr = property_mapping[i].ext1_index - ACTION_PART_1;
    int special = property_mapping[i].ext2_index;
    int music   = property_mapping[i].artwork_index;

    // music uses control definition; map it to position of graphic (artwork)
    anim_nr -= GLOBAL_ANIM_ID_CONTROL_FIRST;

    if (anim_nr < 0 || anim_nr >= NUM_GLOBAL_ANIM_TOKENS)
      continue;

    // set animation part to base part, if not specified
    if (!IS_GLOBAL_ANIM_PART(part_nr))
      part_nr = GLOBAL_ANIM_ID_PART_BASE;

    // set animation screen to default, if not specified
    if (!IS_SPECIAL_GFX_ARG(special))
      special = GFX_SPECIAL_ARG_DEFAULT;

    global_anim_info[anim_nr].music[part_nr][special] = music;
  }

#if 0
  for (i = 0; i < NUM_GLOBAL_ANIMS; i++)
    for (j = 0; j < NUM_GLOBAL_ANIM_PARTS_ALL; j++)
      for (k = 0; k < NUM_SPECIAL_GFX_ARGS; k++)
	if (global_anim_info[i].music[j][k] != MUS_UNDEFINED)
	  Debug("init:InitGlobalAnimMusicInfo",
		"anim %d, part %d, mode %d => %d",
		i, j, k, global_anim_info[i].music[j][k]);
#endif
}

static void InitElementGraphicInfo(void)
{
  struct PropertyMapping *property_mapping = getImageListPropertyMapping();
  int num_property_mappings = getImageListPropertyMappingSize();
  int i, act, dir;

  if (graphic_info == NULL)		// still at startup phase
    return;

  // set values to -1 to identify later as "uninitialized" values
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
  {
    for (act = 0; act < NUM_ACTIONS; act++)
    {
      element_info[i].graphic[act] = -1;
      element_info[i].crumbled[act] = -1;

      for (dir = 0; dir < NUM_DIRECTIONS_FULL; dir++)
      {
	element_info[i].direction_graphic[act][dir] = -1;
	element_info[i].direction_crumbled[act][dir] = -1;
      }
    }
  }

  UPDATE_BUSY_STATE();

  // initialize normal element/graphic mapping from static configuration
  for (i = 0; element_to_graphic[i].element > -1; i++)
  {
    int element      = element_to_graphic[i].element;
    int action       = element_to_graphic[i].action;
    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) &&
	base_graphic != -1)
    {
      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
	 use an existing (in this case considered obsolete) action graphic
	 anymore, but use the automatically determined default graphic */
      if (base_redefined && !act_dir_redefined)
	continue;
    }

    if (action < 0)
      action = ACTION_DEFAULT;

    if (crumbled)
    {
      if (direction > -1)
	element_info[element].direction_crumbled[action][direction] = graphic;
      else
	element_info[element].crumbled[action] = graphic;
    }
    else
    {
      if (direction > -1)
	element_info[element].direction_graphic[action][direction] = graphic;
      else
	element_info[element].graphic[action] = graphic;
    }
  }

  // initialize normal element/graphic 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 direction = property_mapping[i].ext2_index;
    int special   = property_mapping[i].ext3_index;
    int graphic   = property_mapping[i].artwork_index;
    boolean crumbled = FALSE;

    if (special == GFX_SPECIAL_ARG_CRUMBLED)
    {
      special = -1;
      crumbled = TRUE;
    }

    if (graphic_info[graphic].bitmap == NULL)
      continue;

    if (element >= MAX_NUM_ELEMENTS || special != -1)
      continue;

    if (action < 0)
      action = ACTION_DEFAULT;

    if (crumbled)
    {
      if (direction < 0)
	for (dir = 0; dir < NUM_DIRECTIONS_FULL; dir++)
	  element_info[element].direction_crumbled[action][dir] = -1;

      if (direction > -1)
	element_info[element].direction_crumbled[action][direction] = graphic;
      else
	element_info[element].crumbled[action] = graphic;
    }
    else
    {
      if (direction < 0)
	for (dir = 0; dir < NUM_DIRECTIONS_FULL; dir++)
	  element_info[element].direction_graphic[action][dir] = -1;

      if (direction > -1)
	element_info[element].direction_graphic[action][direction] = graphic;
      else
	element_info[element].graphic[action] = graphic;
    }
  }

  // now copy all graphics that are defined to be cloned from other graphics
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
  {
    int graphic = element_info[i].graphic[ACTION_DEFAULT];
    int crumbled_like, diggable_like;

    if (graphic == -1)
      continue;

    crumbled_like = graphic_info[graphic].crumbled_like;
    diggable_like = graphic_info[graphic].diggable_like;

    if (crumbled_like != -1 && element_info[i].crumbled[ACTION_DEFAULT] == -1)
    {
      for (act = 0; act < NUM_ACTIONS; act++)
	element_info[i].crumbled[act] =
	  element_info[crumbled_like].crumbled[act];

      for (act = 0; act < NUM_ACTIONS; act++)
	for (dir = 0; dir < NUM_DIRECTIONS_FULL; dir++)
	  element_info[i].direction_crumbled[act][dir] =
	    element_info[crumbled_like].direction_crumbled[act][dir];
    }

    if (diggable_like != -1 && element_info[i].graphic[ACTION_DIGGING] == -1)
    {
      element_info[i].graphic[ACTION_DIGGING] =
	element_info[diggable_like].graphic[ACTION_DIGGING];

      for (dir = 0; dir < NUM_DIRECTIONS_FULL; dir++)
	element_info[i].direction_graphic[ACTION_DIGGING][dir] =
	  element_info[diggable_like].direction_graphic[ACTION_DIGGING][dir];
    }
  }

  // set hardcoded definitions for some runtime elements without graphic
  element_info[EL_AMOEBA_TO_DIAMOND].graphic[ACTION_DEFAULT] = IMG_AMOEBA_DEAD;

  // set hardcoded definitions for some internal elements without graphic
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
  {
    if (IS_EDITOR_CASCADE_INACTIVE(i))
      element_info[i].graphic[ACTION_DEFAULT] = IMG_EDITOR_CASCADE_LIST;
    else if (IS_EDITOR_CASCADE_ACTIVE(i))
      element_info[i].graphic[ACTION_DEFAULT] = IMG_EDITOR_CASCADE_LIST_ACTIVE;
  }

  // now set all undefined/invalid graphics to -1 to set to default after it
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
  {
    for (act = 0; act < NUM_ACTIONS; act++)
    {
      int graphic;

      graphic = element_info[i].graphic[act];
      if (graphic > 0 && graphic_info[graphic].bitmap == NULL)
	element_info[i].graphic[act] = -1;

      graphic = element_info[i].crumbled[act];
      if (graphic > 0 && graphic_info[graphic].bitmap == NULL)
	element_info[i].crumbled[act] = -1;

      for (dir = 0; dir < NUM_DIRECTIONS_FULL; dir++)
      {
	graphic = element_info[i].direction_graphic[act][dir];
	if (graphic > 0 && graphic_info[graphic].bitmap == NULL)
	  element_info[i].direction_graphic[act][dir] = -1;

	graphic = element_info[i].direction_crumbled[act][dir];
	if (graphic > 0 && graphic_info[graphic].bitmap == NULL)
	  element_info[i].direction_crumbled[act][dir] = -1;
      }
    }
  }

  UPDATE_BUSY_STATE();

  // 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_FULL; 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)));

	  // swap frontside and backside graphic tile coordinates, if needed
	  if (swap_movement_tiles_always || swap_movement_tiles_autodetected)
	  {
	    // get current (wrong) backside tile coordinates
	    getGraphicSourceXY(graphic, 0, &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;
	  }
	}
      }
    }
  }

  UPDATE_BUSY_STATE();

  // now set all '-1' values to element specific default values
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
  {
    int default_graphic = element_info[i].graphic[ACTION_DEFAULT];
    int default_crumbled = element_info[i].crumbled[ACTION_DEFAULT];
    int default_direction_graphic[NUM_DIRECTIONS_FULL];
    int default_direction_crumbled[NUM_DIRECTIONS_FULL];

    if (default_graphic == -1)
      default_graphic = IMG_UNKNOWN;

    if (default_crumbled == -1)
      default_crumbled = default_graphic;

    for (dir = 0; dir < NUM_DIRECTIONS_FULL; dir++)
    {
      default_direction_graphic[dir]  = element_info[i].direction_graphic[ACTION_DEFAULT][dir];
      default_direction_crumbled[dir] = element_info[i].direction_crumbled[ACTION_DEFAULT][dir];

      if (default_direction_graphic[dir] == -1)
	default_direction_graphic[dir] = default_graphic;

      if (default_direction_crumbled[dir] == -1)
	default_direction_crumbled[dir] = default_direction_graphic[dir];
    }

    for (act = 0; act < NUM_ACTIONS; act++)
    {
      boolean act_remove = ((IS_DIGGABLE(i)    && act == ACTION_DIGGING)  ||
			    (IS_SNAPPABLE(i)   && act == ACTION_SNAPPING) ||
			    (IS_COLLECTIBLE(i) && act == ACTION_COLLECTING));
      boolean act_turning = (act == ACTION_TURNING_FROM_LEFT ||
			     act == ACTION_TURNING_FROM_RIGHT ||
			     act == ACTION_TURNING_FROM_UP ||
			     act == ACTION_TURNING_FROM_DOWN);

      // 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)
	default_action_graphic = element_info[EL_BD_DEFAULT].graphic[act];
      if (IS_BDX_ELEMENT(i) && element_info[EL_BDX_DEFAULT].graphic[act] != -1)
	default_action_graphic = element_info[EL_BDX_DEFAULT].graphic[act];
      if (IS_SP_ELEMENT(i) && element_info[EL_SP_DEFAULT].graphic[act] != -1)
	default_action_graphic = element_info[EL_SP_DEFAULT].graphic[act];
      if (IS_SB_ELEMENT(i) && element_info[EL_SB_DEFAULT].graphic[act] != -1)
	default_action_graphic = element_info[EL_SB_DEFAULT].graphic[act];
      if (IS_MM_ELEMENT(i) && element_info[EL_MM_DEFAULT].graphic[act] != -1)
	default_action_graphic = element_info[EL_MM_DEFAULT].graphic[act];

      if (IS_BD_ELEMENT(i) && element_info[EL_BD_DEFAULT].crumbled[act] != -1)
	default_action_crumbled = element_info[EL_BD_DEFAULT].crumbled[act];
      if (IS_BDX_ELEMENT(i) && element_info[EL_BDX_DEFAULT].crumbled[act] != -1)
	default_action_crumbled = element_info[EL_BDX_DEFAULT].crumbled[act];
      if (IS_SP_ELEMENT(i) && element_info[EL_SP_DEFAULT].crumbled[act] != -1)
	default_action_crumbled = element_info[EL_SP_DEFAULT].crumbled[act];
      if (IS_SB_ELEMENT(i) && element_info[EL_SB_DEFAULT].crumbled[act] != -1)
	default_action_crumbled = element_info[EL_SB_DEFAULT].crumbled[act];
      if (IS_MM_ELEMENT(i) && element_info[EL_MM_DEFAULT].crumbled[act] != -1)
	default_action_crumbled = element_info[EL_MM_DEFAULT].crumbled[act];

      // !!! needed because EL_EMPTY_SPACE treated as IS_SP_ELEMENT !!!
      // !!! make this better !!!
      if (i == EL_EMPTY_SPACE)
      {
	default_action_graphic = element_info[EL_DEFAULT].graphic[act];
	default_action_crumbled = element_info[EL_DEFAULT].crumbled[act];
      }

      if (default_action_graphic == -1)
	default_action_graphic = default_graphic;

      if (default_action_crumbled == -1)
	default_action_crumbled = default_action_graphic;

      for (dir = 0; dir < NUM_DIRECTIONS_FULL; 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 ? 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 (default_action_direction_crumbled == -1)
	  default_action_direction_crumbled = element_info[i].direction_graphic[act][dir];

	if (element_info[i].direction_crumbled[act][dir] == -1)
	  element_info[i].direction_crumbled[act][dir] = default_action_direction_crumbled;
      }

      // no graphic for this specific action -- use default action graphic
      if (element_info[i].graphic[act] == -1)
	element_info[i].graphic[act] =
	  (act_remove ? default_remove_graphic :
	   act_turning ? element_info[i].graphic[ACTION_TURNING] :
	   default_action_graphic);

      if (element_info[i].crumbled[act] == -1)
	element_info[i].crumbled[act] = element_info[i].graphic[act];
    }
  }

  UPDATE_BUSY_STATE();
}

static void InitElementSpecialGraphicInfo(void)
{
  struct PropertyMapping *property_mapping = getImageListPropertyMapping();
  int num_property_mappings = getImageListPropertyMappingSize();
  int i, j;

  // always start with reliable default values
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
    for (j = 0; j < NUM_SPECIAL_GFX_ARGS; j++)
      element_info[i].special_graphic[j] = element_info[i].graphic[ACTION_DEFAULT];

  // initialize special element/graphic mapping from static configuration
  for (i = 0; element_to_special_graphic[i].element > -1; i++)
  {
    int element = element_to_special_graphic[i].element;
    int special = element_to_special_graphic[i].special;
    int graphic = element_to_special_graphic[i].graphic;
    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
       use an existing (in this case considered obsolete) special graphic
       anymore, but use the automatically created (down-scaled) graphic */
    if (base_redefined && !special_redefined)
      continue;

    element_info[element].special_graphic[special] = graphic;
  }

  // initialize special element/graphic 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 direction = property_mapping[i].ext2_index;
    int special   = property_mapping[i].ext3_index;
    int graphic   = property_mapping[i].artwork_index;

    // for action ".active", replace element with active element, if exists
    if (action == ACTION_ACTIVE && element != ELEMENT_ACTIVE(element))
    {
      element = ELEMENT_ACTIVE(element);
      action = -1;
    }

    // for BD effect editor graphics, replace element with effect element, if exists
    if (action != -1 && special == GFX_SPECIAL_ARG_EDITOR)
    {
      int element_bd = map_element_RND_to_BD_effect(element, action);
      int element_ef = map_element_BD_to_RND_cave(element_bd);

      if (element_ef != EL_UNKNOWN)
      {
	element = element_ef;
	action = -1;
      }
    }

    if (element >= MAX_NUM_ELEMENTS)
      continue;

    // do not change special graphic if action or direction was specified
    if (action != -1 || direction != -1)
      continue;

    if (IS_SPECIAL_GFX_ARG(special))
      element_info[element].special_graphic[special] = graphic;
  }

  // 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];
}

static int get_graphic_parameter_value(char *value_raw, char *suffix, int type)
{
  if (type != TYPE_ELEMENT && type != TYPE_GRAPHIC)
    return get_parameter_value(value_raw, suffix, type);

  if (strEqual(value_raw, ARG_UNDEFINED))
    return ARG_UNDEFINED_VALUE;

  if (type == TYPE_ELEMENT)
  {
    char *value = getHashEntry(element_token_hash, value_raw);

    if (value == NULL)
    {
      Warn("---");
      Warn("error found in config file:");
      Warn("- config file: '%s'", getImageConfigFilename());
      Warn("error: invalid element token '%s'", value_raw);
      Warn("custom graphic rejected for this element/action");
      Warn("fallback done to undefined element for this graphic");
      Warn("---");
    }

    return (value != NULL ? atoi(value) : EL_UNDEFINED);
  }
  else if (type == TYPE_GRAPHIC)
  {
    char *value = getHashEntry(graphic_token_hash, value_raw);
    int fallback_graphic = IMG_CHAR_EXCLAM;

    if (value == NULL)
    {
      Warn("---");
      Warn("error found in config file:");
      Warn("- config file: '%s'", getImageConfigFilename());
      Warn("error: invalid graphic token '%s'", value_raw);
      Warn("custom graphic rejected for this element/action");
      Warn("fallback done to 'char_exclam' for this graphic");
      Warn("---");
    }

    return (value != NULL ? atoi(value) : fallback_graphic);
  }

  return -1;
}

static int get_scaled_graphic_width(Bitmap *src_bitmap, int graphic)
{
  int original_width = getOriginalImageWidthFromImageID(graphic);
  int scale_up_factor = graphic_info[graphic].scale_up_factor;

  // only happens when loaded outside artwork system (like "global.busy")
  if (graphic_info == image_initial && src_bitmap)
    original_width = src_bitmap->width;

  return original_width * scale_up_factor;
}

static int get_scaled_graphic_height(Bitmap *src_bitmap, int graphic)
{
  int original_height = getOriginalImageHeightFromImageID(graphic);
  int scale_up_factor = graphic_info[graphic].scale_up_factor;

  // only happens when loaded outside artwork system (like "global.busy")
  if (graphic_info == image_initial && src_bitmap)
    original_height = src_bitmap->height;

  return original_height * scale_up_factor;
}

static void set_graphic_parameters_ext(int graphic, int *parameter, Bitmap **src_bitmaps)
{
  struct GraphicInfo *g = &graphic_info[graphic];
  Bitmap *src_bitmap = (src_bitmaps ? src_bitmaps[IMG_BITMAP_STANDARD] : NULL);
  int anim_frames_per_row = 1, anim_frames_per_col = 1;
  int anim_frames_per_line = 1;

  // always start with reliable default values
  g->src_image_width = 0;
  g->src_image_height = 0;
  g->src_x = 0;
  g->src_y = 0;
  g->width  = TILEX;			// default for element graphics
  g->height = TILEY;			// default for element graphics
  g->offset_x = 0;			// one or both of these values ...
  g->offset_y = 0;			// ... will be corrected later
  g->offset2_x = 0;			// one or both of these values ...
  g->offset2_y = 0;			// ... will be corrected later
  g->swap_double_tiles = -1;		// auto-detect tile swapping
  g->crumbled_like = -1;		// do not use clone element
  g->diggable_like = -1;		// do not use clone element
  g->border_size = TILEX / 8;		// "CRUMBLED" border size
  g->scale_up_factor = 1;		// default: no scaling up
  g->tile_size = TILESIZE;		// default: standard tile size
  g->clone_from = -1;			// do not use clone graphic
  g->init_delay_fixed = 0;
  g->init_delay_random = 0;
  g->init_delay_action = -1;
  g->anim_delay_fixed = 0;
  g->anim_delay_random = 0;
  g->anim_delay_action = -1;
  g->post_delay_fixed = 0;
  g->post_delay_random = 0;
  g->post_delay_action = -1;
  g->init_event = ANIM_EVENT_UNDEFINED;
  g->anim_event = ANIM_EVENT_UNDEFINED;
  g->init_event_action = -1;
  g->anim_event_action = -1;
  g->draw_masked = FALSE;
  g->draw_order = 0;
  g->fade_mode = FADE_MODE_DEFAULT;
  g->fade_delay = -1;
  g->post_delay = -1;
  g->auto_delay = -1;
  g->auto_delay_unit = AUTO_DELAY_UNIT_DEFAULT;
  g->align = ALIGN_CENTER;		// default for title screens
  g->valign = VALIGN_MIDDLE;		// default for title screens
  g->sort_priority = 0;			// default for title screens
  g->class = 0;
  g->style = STYLE_DEFAULT;
  g->alpha = -1;

  g->bitmaps = src_bitmaps;
  g->bitmap = src_bitmap;

  // optional zoom factor for scaling up the image to a larger size
  if (parameter[GFX_ARG_SCALE_UP_FACTOR] != ARG_UNDEFINED_VALUE)
    g->scale_up_factor = parameter[GFX_ARG_SCALE_UP_FACTOR];
  if (g->scale_up_factor < 1)
    g->scale_up_factor = 1;		// no scaling

  // optional tile size for using non-standard image size
  if (parameter[GFX_ARG_TILE_SIZE] != ARG_UNDEFINED_VALUE)
  {
    g->tile_size = parameter[GFX_ARG_TILE_SIZE];

#if 0
    // CHECK: should tile sizes less than standard tile size be allowed?
    if (g->tile_size < TILESIZE)
      g->tile_size = TILESIZE;		// standard tile size
#endif

    // when setting tile size, also set width and height accordingly
    g->width  = g->tile_size;
    g->height = g->tile_size;
  }

  if (g->use_image_size)
  {
    // set new default bitmap size (with scaling, but without small images)
    g->width  = get_scaled_graphic_width(src_bitmap, graphic);
    g->height = get_scaled_graphic_height(src_bitmap, graphic);
  }

  // optional width and height of each animation frame
  if (parameter[GFX_ARG_WIDTH] != ARG_UNDEFINED_VALUE)
    g->width = parameter[GFX_ARG_WIDTH];
  if (parameter[GFX_ARG_HEIGHT] != ARG_UNDEFINED_VALUE)
    g->height = parameter[GFX_ARG_HEIGHT];

  // optional x and y tile position of animation frame sequence
  if (parameter[GFX_ARG_XPOS] != ARG_UNDEFINED_VALUE)
    g->src_x = parameter[GFX_ARG_XPOS] * g->width;
  if (parameter[GFX_ARG_YPOS] != ARG_UNDEFINED_VALUE)
    g->src_y = parameter[GFX_ARG_YPOS] * g->height;

  // optional x and y pixel position of animation frame sequence
  if (parameter[GFX_ARG_X] != ARG_UNDEFINED_VALUE)
    g->src_x = parameter[GFX_ARG_X];
  if (parameter[GFX_ARG_Y] != ARG_UNDEFINED_VALUE)
    g->src_y = parameter[GFX_ARG_Y];

  if (src_bitmap)
  {
    if (g->width <= 0)
    {
      Warn("---");
      Warn("invalid value %d for '%s.width' (fallback done to %d)",
	   g->width, getTokenFromImageID(graphic), TILEX);
      Warn("---");

      g->width = TILEX;		// will be checked to be inside bitmap later
    }

    if (g->height <= 0)
    {
      Warn("---");
      Warn("invalid value %d for '%s.height' (fallback done to %d)",
	   g->height, getTokenFromImageID(graphic), TILEY);
      Warn("---");

      g->height = TILEY;	// will be checked to be inside bitmap later
    }
  }

  if (src_bitmap)
  {
    // get final bitmap size (with scaling, but without small images)
    int src_image_width  = get_scaled_graphic_width(src_bitmap, graphic);
    int src_image_height = get_scaled_graphic_height(src_bitmap, graphic);

    if (parameter[GFX_ARG_TILE_SIZE] != ARG_UNDEFINED_VALUE)
    {
      anim_frames_per_row = MAX(1, src_image_width  / g->tile_size);
      anim_frames_per_col = MAX(1, src_image_height / g->tile_size);
    }
    else
    {
      anim_frames_per_row = MAX(1, src_image_width  / g->width);
      anim_frames_per_col = MAX(1, src_image_height / g->height);
    }

    g->src_image_width  = src_image_width;
    g->src_image_height = src_image_height;
  }

  // correct x or y offset dependent of vertical or horizontal frame order
  if (parameter[GFX_ARG_VERTICAL])	// frames are ordered vertically
  {
    g->offset_y = (parameter[GFX_ARG_OFFSET] != ARG_UNDEFINED_VALUE ?
		   parameter[GFX_ARG_OFFSET] : g->height);
    anim_frames_per_line = anim_frames_per_col;
  }
  else					// frames are ordered horizontally
  {
    g->offset_x = (parameter[GFX_ARG_OFFSET] != ARG_UNDEFINED_VALUE ?
		   parameter[GFX_ARG_OFFSET] : g->width);
    anim_frames_per_line = anim_frames_per_row;
  }

  // optionally, the x and y offset of frames can be specified directly
  if (parameter[GFX_ARG_XOFFSET] != ARG_UNDEFINED_VALUE)
    g->offset_x = parameter[GFX_ARG_XOFFSET];
  if (parameter[GFX_ARG_YOFFSET] != ARG_UNDEFINED_VALUE)
    g->offset_y = parameter[GFX_ARG_YOFFSET];

  // optionally, moving animations may have separate start and end graphics
  g->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
    g->offset2_y = (parameter[GFX_ARG_2ND_OFFSET] != ARG_UNDEFINED_VALUE ?
		    parameter[GFX_ARG_2ND_OFFSET] : g->height);
  else					// frames are ordered horizontally
    g->offset2_x = (parameter[GFX_ARG_2ND_OFFSET] != ARG_UNDEFINED_VALUE ?
		    parameter[GFX_ARG_2ND_OFFSET] : g->width);

  // optionally, the x and y offset of 2nd graphic can be specified directly
  if (parameter[GFX_ARG_2ND_XOFFSET] != ARG_UNDEFINED_VALUE)
    g->offset2_x = parameter[GFX_ARG_2ND_XOFFSET];
  if (parameter[GFX_ARG_2ND_YOFFSET] != ARG_UNDEFINED_VALUE)
    g->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)
    g->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)
    g->anim_frames = parameter[GFX_ARG_FRAMES];
  else if (parameter[GFX_ARG_XPOS] == 0 && !parameter[GFX_ARG_VERTICAL])
    g->anim_frames = anim_frames_per_row;
  else if (parameter[GFX_ARG_YPOS] == 0 && parameter[GFX_ARG_VERTICAL])
    g->anim_frames = anim_frames_per_col;
  else
    g->anim_frames = 1;

  if (g->anim_frames < 1)		// frames must be at least 1
    g->anim_frames = 1;

  g->anim_frames_per_line = (parameter[GFX_ARG_FRAMES_PER_LINE] != ARG_UNDEFINED_VALUE ?
                             parameter[GFX_ARG_FRAMES_PER_LINE] : anim_frames_per_line);

  g->anim_delay = parameter[GFX_ARG_DELAY];
  if (g->anim_delay < 1)		// delay must be at least 1
    g->anim_delay = 1;

  g->anim_mode = parameter[GFX_ARG_ANIM_MODE];

  // automatically determine correct start frame, if not defined
  if (parameter[GFX_ARG_START_FRAME] == ARG_UNDEFINED_VALUE)
    g->anim_start_frame = 0;
  else if (g->anim_mode & ANIM_REVERSE)
    g->anim_start_frame = g->anim_frames - parameter[GFX_ARG_START_FRAME] - 1;
  else
    g->anim_start_frame = parameter[GFX_ARG_START_FRAME];

  // animation synchronized with global frame counter, not move position
  g->anim_global_sync = parameter[GFX_ARG_GLOBAL_SYNC];

  // animation synchronized with global anim frame counter, not move position
  g->anim_global_anim_sync = parameter[GFX_ARG_GLOBAL_ANIM_SYNC];

  // optional element for cloning crumble graphics
  if (parameter[GFX_ARG_CRUMBLED_LIKE] != ARG_UNDEFINED_VALUE)
    g->crumbled_like = parameter[GFX_ARG_CRUMBLED_LIKE];

  // optional element for cloning digging graphics
  if (parameter[GFX_ARG_DIGGABLE_LIKE] != ARG_UNDEFINED_VALUE)
    g->diggable_like = parameter[GFX_ARG_DIGGABLE_LIKE];

  // optional border size for "crumbling" diggable graphics
  if (parameter[GFX_ARG_BORDER_SIZE] != ARG_UNDEFINED_VALUE)
    g->border_size = parameter[GFX_ARG_BORDER_SIZE];

  // used for global animations and player "boring" and "sleeping" actions
  if (parameter[GFX_ARG_INIT_DELAY_FIXED] != ARG_UNDEFINED_VALUE)
    g->init_delay_fixed = parameter[GFX_ARG_INIT_DELAY_FIXED];
  if (parameter[GFX_ARG_INIT_DELAY_RANDOM] != ARG_UNDEFINED_VALUE)
    g->init_delay_random = parameter[GFX_ARG_INIT_DELAY_RANDOM];
  if (parameter[GFX_ARG_ANIM_DELAY_FIXED] != ARG_UNDEFINED_VALUE)
    g->anim_delay_fixed = parameter[GFX_ARG_ANIM_DELAY_FIXED];
  if (parameter[GFX_ARG_ANIM_DELAY_RANDOM] != ARG_UNDEFINED_VALUE)
    g->anim_delay_random = parameter[GFX_ARG_ANIM_DELAY_RANDOM];
  if (parameter[GFX_ARG_POST_DELAY_FIXED] != ARG_UNDEFINED_VALUE)
    g->post_delay_fixed = parameter[GFX_ARG_POST_DELAY_FIXED];
  if (parameter[GFX_ARG_POST_DELAY_RANDOM] != ARG_UNDEFINED_VALUE)
    g->post_delay_random = parameter[GFX_ARG_POST_DELAY_RANDOM];

  // used for global animations
  if (parameter[GFX_ARG_INIT_EVENT] != ARG_UNDEFINED_VALUE)
    g->init_event = parameter[GFX_ARG_INIT_EVENT];
  if (parameter[GFX_ARG_ANIM_EVENT] != ARG_UNDEFINED_VALUE)
    g->anim_event = parameter[GFX_ARG_ANIM_EVENT];
  if (parameter[GFX_ARG_INIT_EVENT_ACTION] != ARG_UNDEFINED_VALUE)
    g->init_event_action = parameter[GFX_ARG_INIT_EVENT_ACTION];
  if (parameter[GFX_ARG_ANIM_EVENT_ACTION] != ARG_UNDEFINED_VALUE)
    g->anim_event_action = parameter[GFX_ARG_ANIM_EVENT_ACTION];
  if (parameter[GFX_ARG_INIT_DELAY_ACTION] != ARG_UNDEFINED_VALUE)
    g->init_delay_action = parameter[GFX_ARG_INIT_DELAY_ACTION];
  if (parameter[GFX_ARG_ANIM_DELAY_ACTION] != ARG_UNDEFINED_VALUE)
    g->anim_delay_action = parameter[GFX_ARG_ANIM_DELAY_ACTION];
  if (parameter[GFX_ARG_POST_DELAY_ACTION] != ARG_UNDEFINED_VALUE)
    g->post_delay_action = parameter[GFX_ARG_POST_DELAY_ACTION];

  // used for toon animations and global animations
  g->step_offset  = parameter[GFX_ARG_STEP_OFFSET];
  g->step_xoffset = parameter[GFX_ARG_STEP_XOFFSET];
  g->step_yoffset = parameter[GFX_ARG_STEP_YOFFSET];
  g->step_delay   = parameter[GFX_ARG_STEP_DELAY];
  g->direction    = parameter[GFX_ARG_DIRECTION];
  g->position     = parameter[GFX_ARG_POSITION];
  g->x            = parameter[GFX_ARG_X];	// (may be uninitialized,
  g->y            = parameter[GFX_ARG_Y];	// unlike src_x and src_y)

  if (g->step_delay < 1)			// delay must be at least 1
    g->step_delay = 1;

  // this is only used for drawing font characters
  g->draw_xoffset = parameter[GFX_ARG_DRAW_XOFFSET];
  g->draw_yoffset = parameter[GFX_ARG_DRAW_YOFFSET];

  // use a different default value for global animations and toons
  if ((graphic >= IMG_GFX_GLOBAL_ANIM_1 && graphic <= IMG_GFX_GLOBAL_ANIM_32) ||
      (graphic >= IMG_TOON_1            && graphic <= IMG_TOON_20))
    g->draw_masked = TRUE;

  // this is used for drawing envelopes, global animations and toons
  if (parameter[GFX_ARG_DRAW_MASKED] != ARG_UNDEFINED_VALUE)
    g->draw_masked = parameter[GFX_ARG_DRAW_MASKED];

  // used for toon animations and global animations
  if (parameter[GFX_ARG_DRAW_ORDER] != ARG_UNDEFINED_VALUE)
    g->draw_order = parameter[GFX_ARG_DRAW_ORDER];

  // optional graphic for cloning all graphics settings
  if (parameter[GFX_ARG_CLONE_FROM] != ARG_UNDEFINED_VALUE)
    g->clone_from = parameter[GFX_ARG_CLONE_FROM];

  // optional settings for drawing title screens and title messages
  if (parameter[GFX_ARG_FADE_MODE] != ARG_UNDEFINED_VALUE)
    g->fade_mode = parameter[GFX_ARG_FADE_MODE];
  if (parameter[GFX_ARG_FADE_DELAY] != ARG_UNDEFINED_VALUE)
    g->fade_delay = parameter[GFX_ARG_FADE_DELAY];
  if (parameter[GFX_ARG_POST_DELAY] != ARG_UNDEFINED_VALUE)
    g->post_delay = parameter[GFX_ARG_POST_DELAY];
  if (parameter[GFX_ARG_AUTO_DELAY] != ARG_UNDEFINED_VALUE)
    g->auto_delay = parameter[GFX_ARG_AUTO_DELAY];
  if (parameter[GFX_ARG_AUTO_DELAY_UNIT] != ARG_UNDEFINED_VALUE)
    g->auto_delay_unit = parameter[GFX_ARG_AUTO_DELAY_UNIT];
  if (parameter[GFX_ARG_ALIGN] != ARG_UNDEFINED_VALUE)
    g->align = parameter[GFX_ARG_ALIGN];
  if (parameter[GFX_ARG_VALIGN] != ARG_UNDEFINED_VALUE)
    g->valign = parameter[GFX_ARG_VALIGN];
  if (parameter[GFX_ARG_SORT_PRIORITY] != ARG_UNDEFINED_VALUE)
    g->sort_priority = parameter[GFX_ARG_SORT_PRIORITY];

  if (parameter[GFX_ARG_CLASS] != ARG_UNDEFINED_VALUE)
    g->class = parameter[GFX_ARG_CLASS];
  if (parameter[GFX_ARG_STYLE] != ARG_UNDEFINED_VALUE)
    g->style = parameter[GFX_ARG_STYLE];
  if (parameter[GFX_ARG_ALPHA] != ARG_UNDEFINED_VALUE)
    g->alpha = parameter[GFX_ARG_ALPHA];

  // this is only used for drawing menu buttons and text
  g->active_xoffset = parameter[GFX_ARG_ACTIVE_XOFFSET];
  g->active_yoffset = parameter[GFX_ARG_ACTIVE_YOFFSET];
  g->pressed_xoffset = parameter[GFX_ARG_PRESSED_XOFFSET];
  g->pressed_yoffset = parameter[GFX_ARG_PRESSED_YOFFSET];

  // this is only used for drawing stacked global animations
  g->stacked_xfactor = parameter[GFX_ARG_STACKED_XFACTOR];
  g->stacked_yfactor = parameter[GFX_ARG_STACKED_YFACTOR];
  g->stacked_xoffset = parameter[GFX_ARG_STACKED_XOFFSET];
  g->stacked_yoffset = parameter[GFX_ARG_STACKED_YOFFSET];

  // this is only used for optional color template images
  g->color_template = parameter[GFX_ARG_COLOR_TEMPLATE];

  // this is only used for optional use of uppercase font chars
  g->uppercase_only = parameter[GFX_ARG_UPPERCASE_ONLY];
}

static void set_graphic_parameters(int graphic)
{
  struct FileInfo *image = getImageListEntryFromImageID(graphic);
  char **parameter_raw = image->parameter;
  Bitmap **src_bitmaps = getBitmapsFromImageID(graphic);
  int parameter[NUM_GFX_ARGS];
  int i;

  // 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++)
    parameter[i] = get_graphic_parameter_value(parameter_raw[i],
					       image_config_suffix[i].token,
					       image_config_suffix[i].type);

  set_graphic_parameters_ext(graphic, parameter, src_bitmaps);

  UPDATE_BUSY_STATE();
}

static void set_cloned_graphic_parameters(int graphic)
{
  int fallback_graphic = IMG_CHAR_EXCLAM;
  int max_num_images = getImageListSize();
  int clone_graphic = graphic_info[graphic].clone_from;
  int num_references_followed = 1;

  while (graphic_info[clone_graphic].clone_from != -1 &&
	 num_references_followed < max_num_images)
  {
    clone_graphic = graphic_info[clone_graphic].clone_from;

    num_references_followed++;
  }

  if (num_references_followed >= max_num_images)
  {
    Warn("---");
    Warn("error found in config file:");
    Warn("- config file: '%s'", getImageConfigFilename());
    Warn("- config token: '%s'", getTokenFromImageID(graphic));
    Warn("error: loop discovered when resolving cloned graphics");
    Warn("custom graphic rejected for this element/action");

    if (graphic == fallback_graphic)
      Fail("no fallback graphic available");

    Warn("fallback done to 'char_exclam' for this graphic");
    Warn("---");

    graphic_info[graphic] = graphic_info[fallback_graphic];
  }
  else
  {
    graphic_info[graphic] = graphic_info[clone_graphic];
    graphic_info[graphic].clone_from = clone_graphic;
  }
}

static void InitGraphicInfo(void)
{
  int fallback_graphic = IMG_CHAR_EXCLAM;
  int num_images = getImageListSize();
  int i;

  // use image size as default values for width and height for these images
  static int full_size_graphics[] =
  {
    IMG_GLOBAL_BORDER,
    IMG_GLOBAL_BORDER_MAIN,
    IMG_GLOBAL_BORDER_SCORES,
    IMG_GLOBAL_BORDER_EDITOR,
    IMG_GLOBAL_BORDER_PLAYING,
    IMG_GLOBAL_DOOR,

    IMG_BACKGROUND_ENVELOPE_1,
    IMG_BACKGROUND_ENVELOPE_2,
    IMG_BACKGROUND_ENVELOPE_3,
    IMG_BACKGROUND_ENVELOPE_4,
    IMG_BACKGROUND_REQUEST,

    IMG_BACKGROUND,
    IMG_BACKGROUND_LOADING_INITIAL,
    IMG_BACKGROUND_LOADING,
    IMG_BACKGROUND_TITLE_INITIAL,
    IMG_BACKGROUND_TITLE,
    IMG_BACKGROUND_MAIN,
    IMG_BACKGROUND_NAMES,
    IMG_BACKGROUND_LEVELS,
    IMG_BACKGROUND_LEVELNR,
    IMG_BACKGROUND_SCORES,
    IMG_BACKGROUND_SCOREINFO,
    IMG_BACKGROUND_EDITOR,
    IMG_BACKGROUND_INFO,
    IMG_BACKGROUND_INFO_ELEMENTS,
    IMG_BACKGROUND_INFO_MUSIC,
    IMG_BACKGROUND_INFO_CREDITS,
    IMG_BACKGROUND_INFO_PROGRAM,
    IMG_BACKGROUND_INFO_VERSION,
    IMG_BACKGROUND_INFO_LEVELSET,
    IMG_BACKGROUND_INFO_LEVEL,
    IMG_BACKGROUND_STORY,
    IMG_BACKGROUND_SETUP,
    IMG_BACKGROUND_PLAYING,
    IMG_BACKGROUND_DOOR,
    IMG_BACKGROUND_TAPE,
    IMG_BACKGROUND_PANEL,
    IMG_BACKGROUND_PALETTE,
    IMG_BACKGROUND_TOOLBOX,

    IMG_TITLESCREEN_INITIAL_1,
    IMG_TITLESCREEN_INITIAL_2,
    IMG_TITLESCREEN_INITIAL_3,
    IMG_TITLESCREEN_INITIAL_4,
    IMG_TITLESCREEN_INITIAL_5,
    IMG_TITLESCREEN_1,
    IMG_TITLESCREEN_2,
    IMG_TITLESCREEN_3,
    IMG_TITLESCREEN_4,
    IMG_TITLESCREEN_5,

    IMG_BACKGROUND_TITLEMESSAGE_INITIAL_1,
    IMG_BACKGROUND_TITLEMESSAGE_INITIAL_2,
    IMG_BACKGROUND_TITLEMESSAGE_INITIAL_3,
    IMG_BACKGROUND_TITLEMESSAGE_INITIAL_4,
    IMG_BACKGROUND_TITLEMESSAGE_INITIAL_5,
    IMG_BACKGROUND_TITLEMESSAGE_1,
    IMG_BACKGROUND_TITLEMESSAGE_2,
    IMG_BACKGROUND_TITLEMESSAGE_3,
    IMG_BACKGROUND_TITLEMESSAGE_4,
    IMG_BACKGROUND_TITLEMESSAGE_5,

    -1
  };

  FreeGlobalAnimEventInfo();

  checked_free(graphic_info);

  graphic_info = checked_calloc(num_images * sizeof(struct GraphicInfo));

  // initialize "use_image_size" flag with default value
  for (i = 0; i < num_images; i++)
    graphic_info[i].use_image_size = FALSE;

  // initialize "use_image_size" flag from static configuration above
  for (i = 0; full_size_graphics[i] != -1; i++)
    graphic_info[full_size_graphics[i]].use_image_size = TRUE;

  // first set all graphic paramaters ...
  for (i = 0; i < num_images; i++)
    set_graphic_parameters(i);

  // ... then copy these parameters for cloned graphics
  for (i = 0; i < num_images; i++)
    if (graphic_info[i].clone_from != -1)
      set_cloned_graphic_parameters(i);

  for (i = 0; i < num_images; i++)
  {
    Bitmap *src_bitmap = graphic_info[i].bitmap;
    int src_x, src_y;
    int width, height;
    int last_frame;
    int src_bitmap_width, src_bitmap_height;

    // now check if no animation frames are outside of the loaded image

    if (graphic_info[i].bitmap == NULL)
      continue;		// skip check for optional images that are undefined

    // get image size (this can differ from the standard element tile size!)
    width  = graphic_info[i].width;
    height = graphic_info[i].height;

    // 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;

    // check if first animation frame is inside specified bitmap

    // do not use getGraphicSourceXY() here to get position of first frame;
    // this avoids calculating wrong start position for out-of-bounds frame
    src_x = graphic_info[i].src_x;
    src_y = graphic_info[i].src_y;

    if (program.headless)
      continue;

    if (src_x < 0 || src_y < 0 ||
	src_x + width  > src_bitmap_width ||
	src_y + height > src_bitmap_height)
    {
      Warn("---");
      Warn("error found in config file:");
      Warn("- config file: '%s'", getImageConfigFilename());
      Warn("- config token: '%s'", getTokenFromImageID(i));
      Warn("- image file: '%s'", src_bitmap->source_filename);
      Warn("- frame size: %d, %d", width, height);
      Warn("error: first animation frame out of bounds (%d, %d) [%d, %d]",
	   src_x, src_y, src_bitmap_width, src_bitmap_height);
      Warn("custom graphic rejected for this element/action");

      if (i == fallback_graphic)
	Fail("no fallback graphic available");

      Warn("fallback done to 'char_exclam' for this graphic");
      Warn("---");

      graphic_info[i] = graphic_info[fallback_graphic];

      // if first frame out of bounds, do not check last frame anymore
      continue;
    }

    // check if last animation frame is inside specified bitmap

    last_frame = graphic_info[i].anim_frames - 1;
    getGraphicSourceXY(i, last_frame, &src_x, &src_y, FALSE);

    if (src_x < 0 || src_y < 0 ||
	src_x + width  > src_bitmap_width ||
	src_y + height > src_bitmap_height)
    {
      Warn("---");
      Warn("error found in config file:");
      Warn("- config file: '%s'", getImageConfigFilename());
      Warn("- config token: '%s'", getTokenFromImageID(i));
      Warn("- image file: '%s'", src_bitmap->source_filename);
      Warn("- frame size: %d, %d", width, height);
      Warn("error: last animation frame (%d) out of bounds (%d, %d) [%d, %d]",
	   last_frame, src_x, src_y, src_bitmap_width, src_bitmap_height);
      Warn("custom graphic rejected for this element/action");

      if (i == fallback_graphic)
	Fail("no fallback graphic available");

      Warn("fallback done to 'char_exclam' for this graphic");
      Warn("---");

      graphic_info[i] = graphic_info[fallback_graphic];
    }
  }
}

static void InitGraphicCompatibilityInfo(void)
{
  struct FileInfo *fi_global_door = getImageListEntryFromImageID(IMG_GLOBAL_DOOR);
  int num_images = getImageListSize();
  int i;

  /* the following compatibility handling is needed for the following case:
     versions up to 3.3.0.0 used one large bitmap "global.door" for various
     graphics mainly used for door and panel graphics, like editor, tape and
     in-game buttons with hard-coded bitmap positions and button sizes; as
     these graphics now have individual definitions, redefining "global.door"
     to change all these graphics at once like before does not work anymore
     (because all those individual definitions still have their default values);
     to solve this, remap all those individual definitions that are not
     redefined to the new bitmap of "global.door" if it was redefined */

  // special compatibility handling if image "global.door" was redefined
  if (fi_global_door->redefined)
  {
    for (i = 0; i < num_images; i++)
    {
      struct FileInfo *fi = getImageListEntryFromImageID(i);

      // process only those images that still use the default settings
      if (!fi->redefined)
      {
	// process all images which default to same image as "global.door"
	if (strEqual(fi->default_filename, fi_global_door->default_filename))
	{
	  // skip all images that are cloned from images that default to same
	  // image as "global.door", but that are redefined to something else
	  if (graphic_info[i].clone_from != -1)
	  {
	    int cloned_graphic = graphic_info[i].clone_from;

	    if (getImageListEntryFromImageID(cloned_graphic)->redefined)
	      continue;
	  }

#if 0
	  Debug("init:InitGraphicCompatibilityInfo",
		"special treatment needed for token '%s'", fi->token);
#endif

	  graphic_info[i].bitmaps = graphic_info[IMG_GLOBAL_DOOR].bitmaps;
	  graphic_info[i].bitmap  = graphic_info[IMG_GLOBAL_DOOR].bitmap;
	}
      }
    }
  }

  // special compatibility handling for "Snake Bite" graphics set
  if (strPrefix(leveldir_current->identifier, "snake_bite"))
  {
    Bitmap *bitmap = graphic_info[IMG_BACKGROUND_SCORES].bitmap;

    BlitBitmap(bitmap, bitmap, 18,  66, 32, 480, 50,  66);
    BlitBitmap(bitmap, bitmap, 466, 66, 32, 480, 434, 66);

    ClearRectangle(bitmap, 2,   66, 32, 480);
    ClearRectangle(bitmap, 514, 66, 32, 480);
  }

  // special compatibility handling for "Jue" graphics sets (2007 and 2019)
  boolean supports_score_info = (menu.draw_xoffset[GAME_MODE_SCOREINFO] != 0);
  if (strPrefix(artwork.gfx_current_identifier, "jue") && !supports_score_info)
  {
    int font_title[] =
    {
      FONT_TITLE_1,
      FONT_TITLE_2,

      -1
    };
    int font_text[] =
    {
      FONT_TEXT_1,
      FONT_TEXT_2,
      FONT_TEXT_3,
      FONT_TEXT_4,

      -1
    };
    int mode_old = GAME_MODE_SCORES;
    int mode_new = GAME_MODE_SCOREINFO;
    int i, j;

    // adjust title screens on score info page
    for (i = 0; font_title[i] != -1; i++)
    {
      struct FontInfo *fi = &font_info[font_title[i]];

      fi->special_graphic[mode_new]   = fi->special_graphic[mode_old];
      fi->special_bitmap_id[mode_new] = fi->special_bitmap_id[mode_old];
    }

    // adjust vertical text and button positions on scores page
    for (i = 0; font_text[i] != -1; i++)
    {
      for (j = 0; j < 2; j++)
      {
	boolean jue0 = strEqual(artwork.gfx_current_identifier, "jue0");
	int font_nr = (j == 0 ? font_text[i] : FONT_ACTIVE(font_text[i]));
	int font_bitmap_id = font_info[font_nr].special_bitmap_id[mode_old];
	int font_yoffset = (jue0 ? 10 : 5);

	gfx.font_bitmap_info[font_bitmap_id].draw_yoffset = font_yoffset;
      }
    }

    // adjust page offsets on score info page
    menu.draw_xoffset[mode_new] = menu.draw_xoffset[mode_old];
    menu.draw_yoffset[mode_new] = menu.draw_yoffset[mode_old];
  }

  InitGraphicCompatibilityInfo_Doors();
}

static void InitElementSoundInfo(void)
{
  struct PropertyMapping *property_mapping = getSoundListPropertyMapping();
  int num_property_mappings = getSoundListPropertyMappingSize();
  int i, j, act;

  // set values to -1 to identify later as "uninitialized" values
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
    for (act = 0; act < NUM_ACTIONS; act++)
      element_info[i].sound[act] = -1;

  // initialize element/sound mapping from static configuration
  for (i = 0; element_to_sound[i].element > -1; i++)
  {
    int element      = element_to_sound[i].element;
    int action       = element_to_sound[i].action;
    int sound        = element_to_sound[i].sound;
    boolean is_class = element_to_sound[i].is_class;

    if (action < 0)
      action = ACTION_DEFAULT;

    if (!is_class)
    {
      element_info[element].sound[action] = sound;
    }
    else
    {
      for (j = 0; j < MAX_NUM_ELEMENTS; j++)
	if (strEqual(element_info[j].class_name, element_info[element].class_name))
	  element_info[j].sound[action] = sound;
    }
  }

  // initialize element class/sound mapping from dynamic configuration
  for (i = 0; i < num_property_mappings; i++)
  {
    int element_class = property_mapping[i].base_index - MAX_NUM_ELEMENTS;
    int action        = property_mapping[i].ext1_index;
    int sound         = property_mapping[i].artwork_index;

    if (element_class < 0 || element_class >= MAX_NUM_ELEMENTS)
      continue;

    if (action < 0)
      action = ACTION_DEFAULT;

    for (j = 0; j < MAX_NUM_ELEMENTS; j++)
      if (strEqual(element_info[j].class_name, element_info[element_class].class_name))
	element_info[j].sound[action] = sound;
  }

  // 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 (element >= MAX_NUM_ELEMENTS)
      continue;

    if (action < 0)
      action = ACTION_DEFAULT;

    element_info[element].sound[action] = sound;
  }

  // now set all '-1' values to element specific default values
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
  {
    for (act = 0; act < NUM_ACTIONS; act++)
    {
      // generic default action sound (defined by "[default]" directive)
      int default_action_sound = element_info[EL_DEFAULT].sound[act];

      // look for special default action sound (classic game specific)
      if (IS_BD_ELEMENT(i) && element_info[EL_BD_DEFAULT].sound[act] != -1)
	default_action_sound = element_info[EL_BD_DEFAULT].sound[act];
      if (IS_BDX_ELEMENT(i) && element_info[EL_BDX_DEFAULT].sound[act] != -1)
	default_action_sound = element_info[EL_BDX_DEFAULT].sound[act];
      if (IS_SP_ELEMENT(i) && element_info[EL_SP_DEFAULT].sound[act] != -1)
	default_action_sound = element_info[EL_SP_DEFAULT].sound[act];
      if (IS_SB_ELEMENT(i) && element_info[EL_SB_DEFAULT].sound[act] != -1)
	default_action_sound = element_info[EL_SB_DEFAULT].sound[act];
      if (IS_MM_ELEMENT(i) && element_info[EL_MM_DEFAULT].sound[act] != -1)
	default_action_sound = element_info[EL_MM_DEFAULT].sound[act];

      // !!! 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];

      // 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(void)
{
  int i;

  // set values to -1 to identify later as "uninitialized" values
  for (i = 0; i < NUM_SPECIAL_GFX_ARGS; i++)
    menu.sound[i] = -1;

  // initialize gamemode/sound mapping from static configuration
  for (i = 0; gamemode_to_sound[i].sound > -1; i++)
  {
    int gamemode = gamemode_to_sound[i].gamemode;
    int sound    = gamemode_to_sound[i].sound;

    if (gamemode < 0)
      gamemode = GAME_MODE_DEFAULT;

    menu.sound[gamemode] = sound;
  }

  // now set all '-1' values to levelset specific default values
  for (i = 0; i < NUM_SPECIAL_GFX_ARGS; i++)
    if (menu.sound[i] == -1)
      menu.sound[i] = menu.sound[GAME_MODE_DEFAULT];
}

static void set_sound_parameters(int sound, char **parameter_raw)
{
  int parameter[NUM_SND_ARGS];
  int i;

  // get integer values from string parameters
  for (i = 0; i < NUM_SND_ARGS; i++)
    parameter[i] = get_parameter_value(parameter_raw[i],
                                       sound_config_suffix[i].token,
                                       sound_config_suffix[i].type);

  // 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].priority = parameter[SND_ARG_PRIORITY];
}

static void InitSoundInfo(void)
{
  int *sound_effect_properties;
  int num_sounds = getSoundListSize();
  int i, j;

  checked_free(sound_info);

  sound_effect_properties = checked_calloc(num_sounds * sizeof(int));
  sound_info = checked_calloc(num_sounds * sizeof(struct SoundInfo));

  // initialize sound effect for all elements to "no sound"
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
    for (j = 0; j < NUM_ACTIONS; j++)
      element_info[i].sound[j] = SND_UNDEFINED;

  for (i = 0; i < num_sounds; i++)
  {
    struct FileInfo *sound = getSoundListEntry(i);
    int len_effect_text = strlen(sound->token);

    sound_effect_properties[i] = ACTION_OTHER;
    sound_info[i].loop = FALSE;		// default: play sound only once

    // determine all loop sounds and identify certain sound classes

    for (j = 0; element_action_info[j].suffix; j++)
    {
      int len_action_text = strlen(element_action_info[j].suffix);

      if (len_action_text < len_effect_text &&
	  strEqual(&sound->token[len_effect_text - len_action_text], element_action_info[j].suffix))
      {
	sound_effect_properties[i] = element_action_info[j].value;
	sound_info[i].loop = element_action_info[j].is_loop_sound;

	break;
      }
    }

    // associate elements and some selected sound actions

    for (j = 0; j < MAX_NUM_ELEMENTS; j++)
    {
      if (element_info[j].class_name)
      {
	int len_class_text = strlen(element_info[j].class_name);

	if (len_class_text + 1 < len_effect_text &&
	    strncmp(sound->token, element_info[j].class_name, len_class_text) == 0 &&
	    sound->token[len_class_text] == '.')
	{
	  int sound_action_value = sound_effect_properties[i];

	  element_info[j].sound[sound_action_value] = i;
	}
      }
    }

    set_sound_parameters(i, sound->parameter);

#if 0
    Debug("init:InitSoundInfo", "loop mode: %d ['%s']",
	  sound_info[i].loop, sound->token);
#endif
  }

  free(sound_effect_properties);
}

static void InitGameModeMusicInfo(void)
{
  struct PropertyMapping *property_mapping = getMusicListPropertyMapping();
  int num_property_mappings = getMusicListPropertyMappingSize();
  int default_levelset_music = -1;
  int i;

  // set values to -1 to identify later as "uninitialized" values
  for (i = 0; i < MAX_LEVELS; i++)
    levelset.music[i] = -1;
  for (i = 0; i < NUM_SPECIAL_GFX_ARGS; i++)
    menu.music[i] = -1;

  // initialize gamemode/music mapping from static configuration
  for (i = 0; gamemode_to_music[i].music > -1; i++)
  {
    int gamemode = gamemode_to_music[i].gamemode;
    int music    = gamemode_to_music[i].music;

    if (gamemode < 0)
      gamemode = GAME_MODE_DEFAULT;

    menu.music[gamemode] = music;
  }

  // initialize gamemode/music mapping from dynamic configuration
  for (i = 0; i < num_property_mappings; i++)
  {
    int prefix   = property_mapping[i].base_index;
    int gamemode = property_mapping[i].ext2_index;
    int level    = property_mapping[i].ext3_index;
    int music    = property_mapping[i].artwork_index;

    if (prefix < 0 || prefix >= NUM_MUSIC_PREFIXES)
      continue;

    if (gamemode < 0)
      gamemode = GAME_MODE_DEFAULT;

    // level specific music only allowed for in-game music
    if (level != -1 && gamemode == GAME_MODE_DEFAULT)
      gamemode = GAME_MODE_PLAYING;

    if (level == -1)
    {
      level = 0;
      default_levelset_music = music;
    }

    if (gamemode == GAME_MODE_PLAYING || gamemode == GAME_MODE_DEFAULT)
      levelset.music[level] = music;
    if (gamemode != GAME_MODE_PLAYING)
      menu.music[gamemode] = music;
  }

  // now set all '-1' values to menu specific default values
  // (undefined values of "levelset.music[]" might stay at "-1" to
  // allow dynamic selection of music files from music directory!)
  for (i = 0; i < MAX_LEVELS; i++)
    if (levelset.music[i] == -1)
      levelset.music[i] = default_levelset_music;
  for (i = 0; i < NUM_SPECIAL_GFX_ARGS; i++)
    if (menu.music[i] == -1)
      menu.music[i] = menu.music[GAME_MODE_DEFAULT];
}

static void set_music_parameters(int music, char **parameter_raw)
{
  int parameter[NUM_MUS_ARGS];
  int i;

  // get integer values from string parameters
  for (i = 0; i < NUM_MUS_ARGS; i++)
    parameter[i] = get_parameter_value(parameter_raw[i],
                                       music_config_suffix[i].token,
                                       music_config_suffix[i].type);

  // explicit loop mode setting in configuration overrides default value
  if (parameter[MUS_ARG_MODE_LOOP] != ARG_UNDEFINED_VALUE)
    music_info[music].loop = parameter[MUS_ARG_MODE_LOOP];
}

static void InitMusicInfo(void)
{
  int num_music = getMusicListSize();
  int i, j;

  checked_free(music_info);

  music_info = checked_calloc(num_music * sizeof(struct MusicInfo));

  for (i = 0; i < num_music; i++)
  {
    struct FileInfo *music = getMusicListEntry(i);
    int len_music_text = strlen(music->token);

    music_info[i].loop = TRUE;		// default: play music in loop mode

    // determine all loop music

    for (j = 0; music_prefix_info[j].prefix; j++)
    {
      int len_prefix_text = strlen(music_prefix_info[j].prefix);

      if (len_prefix_text < len_music_text &&
	  strncmp(music->token, music_prefix_info[j].prefix, len_prefix_text) == 0)
      {
	music_info[i].loop = music_prefix_info[j].is_loop_music;

	break;
      }
    }

    set_music_parameters(i, music->parameter);
  }
}


static void InitGameInfoFromArtworkInfo(void)
{
  // special case: store initial value of custom artwork setting
  game.use_masked_elements_initial = game.use_masked_elements;
}

static void ReinitializeGraphics(void)
{
  print_timestamp_init("ReinitializeGraphics");

  InitGfxTileSizeInfo(game.tile_size, TILESIZE);

  InitGraphicInfo();			// graphic properties mapping
  print_timestamp_time("InitGraphicInfo");
  InitElementGraphicInfo();		// element game graphic mapping
  print_timestamp_time("InitElementGraphicInfo");
  InitElementSpecialGraphicInfo();	// element special graphic mapping
  print_timestamp_time("InitElementSpecialGraphicInfo");

  InitElementSmallImages();		// scale elements to all needed sizes
  print_timestamp_time("InitElementSmallImages");
  InitScaledImages();			// scale all other images, if needed
  print_timestamp_time("InitScaledImages");
  InitBitmapPointers();			// set standard size bitmap pointers
  print_timestamp_time("InitBitmapPointers");
  InitFontGraphicInfo();		// initialize text drawing functions
  print_timestamp_time("InitFontGraphicInfo");
  InitGlobalAnimGraphicInfo();		// initialize global animation config
  print_timestamp_time("InitGlobalAnimGraphicInfo");

  InitImageTextures();			// create textures for certain images
  print_timestamp_time("InitImageTextures");

  InitGraphicInfo_BD();			// graphic mapping for BD engine
  print_timestamp_time("InitGraphicInfo_BD");
  InitGraphicInfo_EM();			// graphic mapping for EM engine
  print_timestamp_time("InitGraphicInfo_EM");

  InitGraphicCompatibilityInfo();
  print_timestamp_time("InitGraphicCompatibilityInfo");

  InitGadgets();
  print_timestamp_time("InitGadgets");
  InitDoors();
  print_timestamp_time("InitDoors");

  InitGameInfoFromArtworkInfo();

  print_timestamp_done("ReinitializeGraphics");
}

static void ReinitializeSounds(void)
{
  InitSoundInfo();		// sound properties mapping
  InitElementSoundInfo();	// element game sound mapping
  InitGameModeSoundInfo();	// game mode sound mapping
  InitGlobalAnimSoundInfo();	// global animation sound settings

  InitPlayLevelSound();		// internal game sound settings
}

static void ReinitializeMusic(void)
{
  InitMusicInfo();		// music properties mapping
  InitGameModeMusicInfo();	// game mode music mapping
  InitGlobalAnimMusicInfo();	// global animation music settings
}

static int get_special_property_bit(int element, int property_bit_nr)
{
  struct PropertyBitInfo
  {
    int element;
    int bit_nr;
  };

  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 elements 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_YAMYAM_LEFT,		5	},
    { EL_YAMYAM_RIGHT,		5	},
    { EL_YAMYAM_UP,		5	},
    { EL_YAMYAM_DOWN,		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	},
    { EL_SPRING_LEFT,	        17	},
    { EL_SPRING_RIGHT,	        17	},
    { EL_EMC_ANDROID,	        18	},

    { -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;

  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_info[i].element != -1; i++)
    if (pb_info[i].element == element)
      return pb_info[i].bit_nr;

  return -1;
}

void setBitfieldProperty(int *bitfield, int property_bit_nr, int element, boolean property_value)
{
  int bit_nr = get_special_property_bit(element, property_bit_nr);

  if (bit_nr > -1)
  {
    if (property_value)
      *bitfield |=  (1 << bit_nr);
    else
      *bitfield &= ~(1 << bit_nr);
  }
}

boolean getBitfieldProperty(int *bitfield, int property_bit_nr, int element)
{
  int bit_nr = get_special_property_bit(element, property_bit_nr);

  if (bit_nr > -1)
    return ((*bitfield & (1 << bit_nr)) != 0);

  return FALSE;
}

static void ResolveGroupElementExt(int group_element, int recursion_depth)
{
  static int group_nr;
  static struct ElementGroupInfo *group;
  struct ElementGroupInfo *actual_group = element_info[group_element].group;
  int i;

  if (actual_group == NULL)			// not yet initialized
    return;

  if (recursion_depth > NUM_GROUP_ELEMENTS)	// recursion too deep
  {
    Warn("recursion too deep when resolving group element %d", group_element - EL_GROUP_START + 1);

    // replace element which caused too deep recursion by question mark
    group->element_resolved[group->num_elements_resolved++] = EL_UNKNOWN;

    return;
  }

  if (recursion_depth == 0)			// initialization
  {
    group = actual_group;
    group_nr = GROUP_NR(group_element);

    group->num_elements_resolved = 0;
    group->choice_pos = 0;

    for (i = 0; i < MAX_NUM_ELEMENTS; i++)
      element_info[i].in_group[group_nr] = FALSE;
  }

  for (i = 0; i < actual_group->num_elements; i++)
  {
    int element = actual_group->element[i];

    if (group->num_elements_resolved == NUM_FILE_ELEMENTS)
      break;

    if (IS_GROUP_ELEMENT(element))
    {
      ResolveGroupElementExt(element, recursion_depth + 1);
    }
    else
    {
      group->element_resolved[group->num_elements_resolved++] = element;
      element_info[element].in_group[group_nr] = TRUE;
    }
  }
}

void ResolveGroupElement(int group_element)
{
  ResolveGroupElementExt(group_element, 0);
}

void InitElementPropertiesStatic(void)
{
  static boolean clipboard_elements_initialized = FALSE;

  static int ep_diggable[] =
  {
    EL_SAND,
    EL_SP_BASE,
    EL_SP_BUGGY_BASE,
    EL_SP_BUGGY_BASE_ACTIVATING,
    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_DC_LANDMINE,
    EL_TRAP_ACTIVE,
    EL_SP_BUGGY_BASE_ACTIVE,
    EL_EMC_PLANT,
#endif

    -1
  };

  static int ep_collectible_only[] =
  {
    EL_BD_DIAMOND,
    EL_EMERALD,
    EL_DIAMOND,
    EL_EMERALD_YELLOW,
    EL_EMERALD_RED,
    EL_EMERALD_PURPLE,
    EL_KEY_1,
    EL_KEY_2,
    EL_KEY_3,
    EL_KEY_4,
    EL_EM_KEY_1,
    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_EM_DYNAMITE,
    EL_DYNABOMB_INCREASE_NUMBER,
    EL_DYNABOMB_INCREASE_SIZE,
    EL_DYNABOMB_INCREASE_POWER,
    EL_SP_INFOTRON,
    EL_SP_DISK_RED,
    EL_PEARL,
    EL_CRYSTAL,
    EL_DC_KEY_WHITE,
    EL_SHIELD_NORMAL,
    EL_SHIELD_DEADLY,
    EL_EXTRA_TIME,
    EL_ENVELOPE_1,
    EL_ENVELOPE_2,
    EL_ENVELOPE_3,
    EL_ENVELOPE_4,
    EL_SPEED_PILL,
    EL_EMC_LENSES,
    EL_EMC_MAGNIFIER,

#if 0
    // !!! handle separately !!!
    EL_DC_LANDMINE,	// deadly when running into, but can be snapped
#endif

    -1
  };

  static int ep_dont_run_into[] =
  {
    // same elements as in 'ep_dont_touch'
    EL_BUG,
    EL_SPACESHIP,
    EL_BD_BUTTERFLY,
    EL_BD_FIREFLY,

    // same elements as in 'ep_dont_collide_with'
    EL_YAMYAM,
    EL_DARK_YAMYAM,
    EL_ROBOT,
    EL_PACMAN,
    EL_SP_SNIKSNAK,
    EL_SP_ELECTRON,

    // new elements
    EL_AMOEBA_DROP,
    EL_ACID,

    // !!! maybe this should better be handled by 'ep_diggable' !!!
#if 1
    EL_LANDMINE,
    EL_DC_LANDMINE,
    EL_TRAP_ACTIVE,
    EL_SP_BUGGY_BASE_ACTIVE,
    EL_EMC_PLANT,
#endif

    -1
  };

  static int ep_dont_collide_with[] =
  {
    // same elements as in 'ep_dont_touch'
    EL_BUG,
    EL_SPACESHIP,
    EL_BD_BUTTERFLY,
    EL_BD_FIREFLY,

    // new elements
    EL_YAMYAM,
    EL_DARK_YAMYAM,
    EL_ROBOT,
    EL_PACMAN,
    EL_SP_SNIKSNAK,
    EL_SP_ELECTRON,

    -1
  };

  static int ep_dont_touch[] =
  {
    EL_BUG,
    EL_SPACESHIP,
    EL_BD_BUTTERFLY,
    EL_BD_FIREFLY,

    -1
  };

  static int ep_indestructible[] =
  {
    EL_STEELWALL,
    EL_ACID,
    EL_ACID_POOL_TOPLEFT,
    EL_ACID_POOL_TOPRIGHT,
    EL_ACID_POOL_BOTTOMLEFT,
    EL_ACID_POOL_BOTTOM,
    EL_ACID_POOL_BOTTOMRIGHT,
    EL_SP_HARDWARE_GRAY,
    EL_SP_HARDWARE_GREEN,
    EL_SP_HARDWARE_BLUE,
    EL_SP_HARDWARE_RED,
    EL_SP_HARDWARE_YELLOW,
    EL_SP_HARDWARE_BASE_1,
    EL_SP_HARDWARE_BASE_2,
    EL_SP_HARDWARE_BASE_3,
    EL_SP_HARDWARE_BASE_4,
    EL_SP_HARDWARE_BASE_5,
    EL_SP_HARDWARE_BASE_6,
    EL_INVISIBLE_STEELWALL,
    EL_INVISIBLE_STEELWALL_ACTIVE,
    EL_CONVEYOR_BELT_1_SWITCH_LEFT,
    EL_CONVEYOR_BELT_1_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_1_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_2_SWITCH_LEFT,
    EL_CONVEYOR_BELT_2_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_2_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_3_SWITCH_LEFT,
    EL_CONVEYOR_BELT_3_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_3_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_4_SWITCH_LEFT,
    EL_CONVEYOR_BELT_4_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_4_SWITCH_RIGHT,
    EL_LIGHT_SWITCH,
    EL_LIGHT_SWITCH_ACTIVE,
    EL_SIGN_EXCLAMATION,
    EL_SIGN_RADIOACTIVITY,
    EL_SIGN_STOP,
    EL_SIGN_WHEELCHAIR,
    EL_SIGN_PARKING,
    EL_SIGN_NO_ENTRY,
    EL_SIGN_UNUSED_1,
    EL_SIGN_GIVE_WAY,
    EL_SIGN_ENTRY_FORBIDDEN,
    EL_SIGN_EMERGENCY_EXIT,
    EL_SIGN_YIN_YANG,
    EL_SIGN_UNUSED_2,
    EL_SIGN_SPERMS,
    EL_SIGN_BULLET,
    EL_SIGN_HEART,
    EL_SIGN_CROSS,
    EL_SIGN_FRANKIE,
    EL_STEEL_EXIT_CLOSED,
    EL_STEEL_EXIT_OPEN,
    EL_STEEL_EXIT_OPENING,
    EL_STEEL_EXIT_CLOSING,
    EL_EM_STEEL_EXIT_CLOSED,
    EL_EM_STEEL_EXIT_OPEN,
    EL_EM_STEEL_EXIT_OPENING,
    EL_EM_STEEL_EXIT_CLOSING,
    EL_DC_STEELWALL_1_LEFT,
    EL_DC_STEELWALL_1_RIGHT,
    EL_DC_STEELWALL_1_TOP,
    EL_DC_STEELWALL_1_BOTTOM,
    EL_DC_STEELWALL_1_HORIZONTAL,
    EL_DC_STEELWALL_1_VERTICAL,
    EL_DC_STEELWALL_1_TOPLEFT,
    EL_DC_STEELWALL_1_TOPRIGHT,
    EL_DC_STEELWALL_1_BOTTOMLEFT,
    EL_DC_STEELWALL_1_BOTTOMRIGHT,
    EL_DC_STEELWALL_1_TOPLEFT_2,
    EL_DC_STEELWALL_1_TOPRIGHT_2,
    EL_DC_STEELWALL_1_BOTTOMLEFT_2,
    EL_DC_STEELWALL_1_BOTTOMRIGHT_2,
    EL_DC_STEELWALL_2_LEFT,
    EL_DC_STEELWALL_2_RIGHT,
    EL_DC_STEELWALL_2_TOP,
    EL_DC_STEELWALL_2_BOTTOM,
    EL_DC_STEELWALL_2_HORIZONTAL,
    EL_DC_STEELWALL_2_VERTICAL,
    EL_DC_STEELWALL_2_MIDDLE,
    EL_DC_STEELWALL_2_SINGLE,
    EL_STEELWALL_SLIPPERY,
    EL_EMC_STEELWALL_1,
    EL_EMC_STEELWALL_2,
    EL_EMC_STEELWALL_3,
    EL_EMC_STEELWALL_4,
    EL_CRYSTAL,
    EL_GATE_1,
    EL_GATE_2,
    EL_GATE_3,
    EL_GATE_4,
    EL_GATE_1_GRAY,
    EL_GATE_2_GRAY,
    EL_GATE_3_GRAY,
    EL_GATE_4_GRAY,
    EL_GATE_1_GRAY_ACTIVE,
    EL_GATE_2_GRAY_ACTIVE,
    EL_GATE_3_GRAY_ACTIVE,
    EL_GATE_4_GRAY_ACTIVE,
    EL_EM_GATE_1,
    EL_EM_GATE_2,
    EL_EM_GATE_3,
    EL_EM_GATE_4,
    EL_EM_GATE_1_GRAY,
    EL_EM_GATE_2_GRAY,
    EL_EM_GATE_3_GRAY,
    EL_EM_GATE_4_GRAY,
    EL_EM_GATE_1_GRAY_ACTIVE,
    EL_EM_GATE_2_GRAY_ACTIVE,
    EL_EM_GATE_3_GRAY_ACTIVE,
    EL_EM_GATE_4_GRAY_ACTIVE,
    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_EMC_GATE_5_GRAY_ACTIVE,
    EL_EMC_GATE_6_GRAY_ACTIVE,
    EL_EMC_GATE_7_GRAY_ACTIVE,
    EL_EMC_GATE_8_GRAY_ACTIVE,
    EL_DC_GATE_WHITE,
    EL_DC_GATE_WHITE_GRAY,
    EL_DC_GATE_WHITE_GRAY_ACTIVE,
    EL_DC_GATE_FAKE_GRAY,
    EL_SWITCHGATE_OPEN,
    EL_SWITCHGATE_OPENING,
    EL_SWITCHGATE_CLOSED,
    EL_SWITCHGATE_CLOSING,
    EL_DC_SWITCHGATE_SWITCH_UP,
    EL_DC_SWITCHGATE_SWITCH_DOWN,
    EL_TIMEGATE_OPEN,
    EL_TIMEGATE_OPENING,
    EL_TIMEGATE_CLOSED,
    EL_TIMEGATE_CLOSING,
    EL_DC_TIMEGATE_SWITCH,
    EL_DC_TIMEGATE_SWITCH_ACTIVE,
    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,
    EL_EXPANDABLE_STEELWALL_HORIZONTAL,
    EL_EXPANDABLE_STEELWALL_VERTICAL,
    EL_EXPANDABLE_STEELWALL_ANY,

    -1
  };

  static int ep_slippery[] =
  {
    EL_WALL_SLIPPERY,
    EL_BD_WALL,
    EL_ROCK,
    EL_BD_ROCK,
    EL_EMERALD,
    EL_BD_DIAMOND,
    EL_EMERALD_YELLOW,
    EL_EMERALD_RED,
    EL_EMERALD_PURPLE,
    EL_DIAMOND,
    EL_BOMB,
    EL_NUT,
    EL_ROBOT_WHEEL_ACTIVE,
    EL_ROBOT_WHEEL,
    EL_TIME_ORB_FULL,
    EL_TIME_ORB_EMPTY,
    EL_LAMP_ACTIVE,
    EL_LAMP,
    EL_ACID_POOL_TOPLEFT,
    EL_ACID_POOL_TOPRIGHT,
    EL_SATELLITE,
    EL_SP_ZONK,
    EL_SP_INFOTRON,
    EL_SP_CHIP_SINGLE,
    EL_SP_CHIP_LEFT,
    EL_SP_CHIP_RIGHT,
    EL_SP_CHIP_TOP,
    EL_SP_CHIP_BOTTOM,
    EL_SPEED_PILL,
    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,
    EL_EMC_MAGIC_BALL,
    EL_EMC_MAGIC_BALL_ACTIVE,

    -1
  };

  static int ep_can_change[] =
  {
    -1
  };

  static int ep_can_move[] =
  {
    // same elements as in 'pb_can_move_into_acid'
    EL_BUG,
    EL_SPACESHIP,
    EL_BD_BUTTERFLY,
    EL_BD_FIREFLY,
    EL_YAMYAM,
    EL_DARK_YAMYAM,
    EL_ROBOT,
    EL_PACMAN,
    EL_MOLE,
    EL_PENGUIN,
    EL_PIG,
    EL_DRAGON,
    EL_SATELLITE,
    EL_SP_SNIKSNAK,
    EL_SP_ELECTRON,
    EL_BALLOON,
    EL_SPRING,
    EL_EMC_ANDROID,

    -1
  };

  static int ep_can_fall[] =
  {
    EL_ROCK,
    EL_BD_ROCK,
    EL_EMERALD,
    EL_BD_DIAMOND,
    EL_EMERALD_YELLOW,
    EL_EMERALD_RED,
    EL_EMERALD_PURPLE,
    EL_DIAMOND,
    EL_BOMB,
    EL_NUT,
    EL_AMOEBA_DROP,
    EL_AMOEBA_DROPPING,
    EL_QUICKSAND_FULL,
    EL_QUICKSAND_FAST_FULL,
    EL_MAGIC_WALL_FULL,
    EL_BD_MAGIC_WALL_FULL,
    EL_DC_MAGIC_WALL_FULL,
    EL_TIME_ORB_FULL,
    EL_TIME_ORB_EMPTY,
    EL_SP_ZONK,
    EL_SP_INFOTRON,
    EL_SP_DISK_ORANGE,
    EL_PEARL,
    EL_CRYSTAL,
    EL_SPRING,
    EL_DX_SUPABOMB,

    -1
  };

  static int ep_can_smash_player[] =
  {
    EL_ROCK,
    EL_BD_ROCK,
    EL_EMERALD,
    EL_BD_DIAMOND,
    EL_EMERALD_YELLOW,
    EL_EMERALD_RED,
    EL_EMERALD_PURPLE,
    EL_DIAMOND,
    EL_BOMB,
    EL_NUT,
    EL_AMOEBA_DROP,
    EL_TIME_ORB_FULL,
    EL_TIME_ORB_EMPTY,
    EL_SP_ZONK,
    EL_SP_INFOTRON,
    EL_SP_DISK_ORANGE,
    EL_PEARL,
    EL_CRYSTAL,
    EL_SPRING,
    EL_DX_SUPABOMB,

    -1
  };

  static int ep_can_smash_enemies[] =
  {
    EL_ROCK,
    EL_BD_ROCK,
    EL_SP_ZONK,

    -1
  };

  static int ep_can_smash_everything[] =
  {
    EL_ROCK,
    EL_BD_ROCK,
    EL_SP_ZONK,

    -1
  };

  static int ep_explodes_by_fire[] =
  {
    // 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,

    // new elements
    EL_DYNAMITE,
    EL_DYNAMITE_ACTIVE,
    EL_EM_DYNAMITE,
    EL_EM_DYNAMITE_ACTIVE,
    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,
#if 0
    EL_BLACK_ORB,
#endif

    -1
  };

  static int ep_explodes_smashed[] =
  {
    // same elements as in 'ep_explodes_impact'
    EL_BOMB,
    EL_SP_DISK_ORANGE,
    EL_DX_SUPABOMB,

    // new elements
    EL_SATELLITE,
    EL_PIG,
    EL_DRAGON,
    EL_MOLE,

    -1
  };

  static int ep_explodes_impact[] =
  {
    EL_BOMB,
    EL_SP_DISK_ORANGE,
    EL_DX_SUPABOMB,

    -1
  };

  static int ep_walkable_over[] =
  {
    EL_EMPTY_SPACE,
    EL_EMPTY_SPACE_1,
    EL_EMPTY_SPACE_2,
    EL_EMPTY_SPACE_3,
    EL_EMPTY_SPACE_4,
    EL_EMPTY_SPACE_5,
    EL_EMPTY_SPACE_6,
    EL_EMPTY_SPACE_7,
    EL_EMPTY_SPACE_8,
    EL_EMPTY_SPACE_9,
    EL_EMPTY_SPACE_10,
    EL_EMPTY_SPACE_11,
    EL_EMPTY_SPACE_12,
    EL_EMPTY_SPACE_13,
    EL_EMPTY_SPACE_14,
    EL_EMPTY_SPACE_15,
    EL_EMPTY_SPACE_16,
    EL_SP_EMPTY_SPACE,
    EL_SOKOBAN_FIELD_EMPTY,
    EL_EXIT_OPEN,
    EL_EM_EXIT_OPEN,
    EL_EM_EXIT_OPENING,
    EL_SP_EXIT_OPEN,
    EL_SP_EXIT_OPENING,
    EL_STEEL_EXIT_OPEN,
    EL_EM_STEEL_EXIT_OPEN,
    EL_EM_STEEL_EXIT_OPENING,
    EL_GATE_1,
    EL_GATE_2,
    EL_GATE_3,
    EL_GATE_4,
    EL_GATE_1_GRAY,
    EL_GATE_2_GRAY,
    EL_GATE_3_GRAY,
    EL_GATE_4_GRAY,
    EL_GATE_1_GRAY_ACTIVE,
    EL_GATE_2_GRAY_ACTIVE,
    EL_GATE_3_GRAY_ACTIVE,
    EL_GATE_4_GRAY_ACTIVE,
    EL_PENGUIN,
    EL_PIG,
    EL_DRAGON,

    -1
  };

  static int 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,

    -1
  };

  static int ep_walkable_under[] =
  {
    -1
  };

  static int ep_passable_over[] =
  {
    EL_EM_GATE_1,
    EL_EM_GATE_2,
    EL_EM_GATE_3,
    EL_EM_GATE_4,
    EL_EM_GATE_1_GRAY,
    EL_EM_GATE_2_GRAY,
    EL_EM_GATE_3_GRAY,
    EL_EM_GATE_4_GRAY,
    EL_EM_GATE_1_GRAY_ACTIVE,
    EL_EM_GATE_2_GRAY_ACTIVE,
    EL_EM_GATE_3_GRAY_ACTIVE,
    EL_EM_GATE_4_GRAY_ACTIVE,
    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_EMC_GATE_5_GRAY_ACTIVE,
    EL_EMC_GATE_6_GRAY_ACTIVE,
    EL_EMC_GATE_7_GRAY_ACTIVE,
    EL_EMC_GATE_8_GRAY_ACTIVE,
    EL_DC_GATE_WHITE,
    EL_DC_GATE_WHITE_GRAY,
    EL_DC_GATE_WHITE_GRAY_ACTIVE,
    EL_SWITCHGATE_OPEN,
    EL_TIMEGATE_OPEN,

    -1
  };

  static int 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_passable_under[] =
  {
    -1
  };

  static int ep_droppable[] =
  {
    -1
  };

  static int ep_explodes_1x1_old[] =
  {
    -1
  };

  static int ep_pushable[] =
  {
    EL_ROCK,
    EL_BOMB,
    EL_DX_SUPABOMB,
    EL_NUT,
    EL_TIME_ORB_EMPTY,
    EL_SP_ZONK,
    EL_SP_DISK_ORANGE,
    EL_SPRING,
    EL_BD_ROCK,
    EL_SOKOBAN_OBJECT,
    EL_SOKOBAN_FIELD_FULL,
    EL_SATELLITE,
    EL_SP_DISK_YELLOW,
    EL_BALLOON,
    EL_EMC_ANDROID,

    -1
  };

  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,
    EL_EM_GATE_4,
    EL_EM_GATE_1_GRAY,
    EL_EM_GATE_2_GRAY,
    EL_EM_GATE_3_GRAY,
    EL_EM_GATE_4_GRAY,
    EL_EM_GATE_1_GRAY_ACTIVE,
    EL_EM_GATE_2_GRAY_ACTIVE,
    EL_EM_GATE_3_GRAY_ACTIVE,
    EL_EM_GATE_4_GRAY_ACTIVE,
    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_EMC_GATE_5_GRAY_ACTIVE,
    EL_EMC_GATE_6_GRAY_ACTIVE,
    EL_EMC_GATE_7_GRAY_ACTIVE,
    EL_EMC_GATE_8_GRAY_ACTIVE,
    EL_DC_GATE_WHITE,
    EL_DC_GATE_WHITE_GRAY,
    EL_DC_GATE_WHITE_GRAY_ACTIVE,
    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,
    EL_DYNAMITE_ACTIVE,
    EL_EM_DYNAMITE,
    EL_EM_DYNAMITE_ACTIVE,
    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
  };

  static int ep_empty_space[] =
  {
    EL_EMPTY_SPACE,
    EL_EMPTY_SPACE_1,
    EL_EMPTY_SPACE_2,
    EL_EMPTY_SPACE_3,
    EL_EMPTY_SPACE_4,
    EL_EMPTY_SPACE_5,
    EL_EMPTY_SPACE_6,
    EL_EMPTY_SPACE_7,
    EL_EMPTY_SPACE_8,
    EL_EMPTY_SPACE_9,
    EL_EMPTY_SPACE_10,
    EL_EMPTY_SPACE_11,
    EL_EMPTY_SPACE_12,
    EL_EMPTY_SPACE_13,
    EL_EMPTY_SPACE_14,
    EL_EMPTY_SPACE_15,
    EL_EMPTY_SPACE_16,

    -1
  };

  static int ep_player[] =
  {
    EL_PLAYER_1,
    EL_PLAYER_2,
    EL_PLAYER_3,
    EL_PLAYER_4,
    EL_SP_MURPHY,
    EL_SOKOBAN_FIELD_PLAYER,
    EL_TRIGGER_PLAYER,

    -1
  };

  static int ep_can_pass_magic_wall[] =
  {
    EL_ROCK,
    EL_BD_ROCK,
    EL_EMERALD,
    EL_BD_DIAMOND,
    EL_EMERALD_YELLOW,
    EL_EMERALD_RED,
    EL_EMERALD_PURPLE,
    EL_DIAMOND,

    -1
  };

  static int ep_can_pass_dc_magic_wall[] =
  {
    EL_ROCK,
    EL_BD_ROCK,
    EL_EMERALD,
    EL_BD_DIAMOND,
    EL_EMERALD_YELLOW,
    EL_EMERALD_RED,
    EL_EMERALD_PURPLE,
    EL_DIAMOND,
    EL_PEARL,
    EL_CRYSTAL,

    -1
  };

  static int ep_switchable[] =
  {
    EL_ROBOT_WHEEL,
    EL_SP_TERMINAL,
    EL_CONVEYOR_BELT_1_SWITCH_LEFT,
    EL_CONVEYOR_BELT_1_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_1_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_2_SWITCH_LEFT,
    EL_CONVEYOR_BELT_2_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_2_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_3_SWITCH_LEFT,
    EL_CONVEYOR_BELT_3_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_3_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_4_SWITCH_LEFT,
    EL_CONVEYOR_BELT_4_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_4_SWITCH_RIGHT,
    EL_SWITCHGATE_SWITCH_UP,
    EL_SWITCHGATE_SWITCH_DOWN,
    EL_DC_SWITCHGATE_SWITCH_UP,
    EL_DC_SWITCHGATE_SWITCH_DOWN,
    EL_LIGHT_SWITCH,
    EL_LIGHT_SWITCH_ACTIVE,
    EL_TIMEGATE_SWITCH,
    EL_DC_TIMEGATE_SWITCH,
    EL_BALLOON_SWITCH_LEFT,
    EL_BALLOON_SWITCH_RIGHT,
    EL_BALLOON_SWITCH_UP,
    EL_BALLOON_SWITCH_DOWN,
    EL_BALLOON_SWITCH_ANY,
    EL_BALLOON_SWITCH_NONE,
    EL_LAMP,
    EL_TIME_ORB_FULL,
    EL_EMC_MAGIC_BALL_SWITCH,
    EL_EMC_MAGIC_BALL_SWITCH_ACTIVE,

    -1
  };

  static int ep_bd_element[] =
  {
    EL_EMPTY,
    EL_SAND,
    EL_WALL_SLIPPERY,
    EL_BD_WALL,
    EL_ROCK,
    EL_BD_ROCK,
    EL_BD_DIAMOND,
    EL_BD_MAGIC_WALL,
    EL_EXIT_CLOSED,
    EL_EXIT_OPEN,
    EL_STEELWALL,
    EL_PLAYER_1,
    EL_PLAYER_2,
    EL_PLAYER_3,
    EL_PLAYER_4,
    EL_BD_FIREFLY,
    EL_BD_FIREFLY_LEFT,
    EL_BD_FIREFLY_DOWN,
    EL_BD_FIREFLY_RIGHT,
    EL_BD_FIREFLY_UP,
    EL_BD_BUTTERFLY,
    EL_BD_BUTTERFLY_DOWN,
    EL_BD_BUTTERFLY_LEFT,
    EL_BD_BUTTERFLY_UP,
    EL_BD_BUTTERFLY_RIGHT,
    EL_BD_AMOEBA,
    EL_CHAR_QUESTION,
    EL_UNKNOWN,

    -1
  };

  static int ep_sp_element[] =
  {
    // should always be valid
    EL_EMPTY,

    // standard classic Supaplex elements
    EL_SP_EMPTY,
    EL_SP_ZONK,
    EL_SP_BASE,
    EL_SP_MURPHY,
    EL_SP_INFOTRON,
    EL_SP_CHIP_SINGLE,
    EL_SP_HARDWARE_GRAY,
    EL_SP_EXIT_CLOSED,
    EL_SP_EXIT_OPEN,
    EL_SP_DISK_ORANGE,
    EL_SP_PORT_RIGHT,
    EL_SP_PORT_DOWN,
    EL_SP_PORT_LEFT,
    EL_SP_PORT_UP,
    EL_SP_GRAVITY_PORT_RIGHT,
    EL_SP_GRAVITY_PORT_DOWN,
    EL_SP_GRAVITY_PORT_LEFT,
    EL_SP_GRAVITY_PORT_UP,
    EL_SP_SNIKSNAK,
    EL_SP_DISK_YELLOW,
    EL_SP_TERMINAL,
    EL_SP_DISK_RED,
    EL_SP_PORT_VERTICAL,
    EL_SP_PORT_HORIZONTAL,
    EL_SP_PORT_ANY,
    EL_SP_ELECTRON,
    EL_SP_BUGGY_BASE,
    EL_SP_CHIP_LEFT,
    EL_SP_CHIP_RIGHT,
    EL_SP_HARDWARE_BASE_1,
    EL_SP_HARDWARE_GREEN,
    EL_SP_HARDWARE_BLUE,
    EL_SP_HARDWARE_RED,
    EL_SP_HARDWARE_YELLOW,
    EL_SP_HARDWARE_BASE_2,
    EL_SP_HARDWARE_BASE_3,
    EL_SP_HARDWARE_BASE_4,
    EL_SP_HARDWARE_BASE_5,
    EL_SP_HARDWARE_BASE_6,
    EL_SP_CHIP_TOP,
    EL_SP_CHIP_BOTTOM,

    // additional elements that appeared in newer Supaplex levels
    EL_INVISIBLE_WALL,

    // 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 Supaplex elements
    EL_SP_DISK_RED_ACTIVE,
    EL_SP_TERMINAL_ACTIVE,
    EL_SP_BUGGY_BASE_ACTIVATING,
    EL_SP_BUGGY_BASE_ACTIVE,
    EL_SP_EXIT_OPENING,
    EL_SP_EXIT_CLOSING,

    -1
  };

  static int ep_sb_element[] =
  {
    EL_EMPTY,
    EL_STEELWALL,
    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
  };

  static int ep_gem[] =
  {
    EL_BD_DIAMOND,
    EL_EMERALD,
    EL_EMERALD_YELLOW,
    EL_EMERALD_RED,
    EL_EMERALD_PURPLE,
    EL_DIAMOND,

    -1
  };

  static int ep_food_dark_yamyam[] =
  {
    EL_SAND,
    EL_BUG,
    EL_SPACESHIP,
    EL_BD_BUTTERFLY,
    EL_BD_FIREFLY,
    EL_YAMYAM,
    EL_ROBOT,
    EL_PACMAN,
    EL_AMOEBA_DROP,
    EL_AMOEBA_DEAD,
    EL_AMOEBA_WET,
    EL_AMOEBA_DRY,
    EL_AMOEBA_FULL,
    EL_BD_AMOEBA,
    EL_EMERALD,
    EL_BD_DIAMOND,
    EL_EMERALD_YELLOW,
    EL_EMERALD_RED,
    EL_EMERALD_PURPLE,
    EL_DIAMOND,
    EL_PEARL,
    EL_CRYSTAL,

    -1
  };

  static int ep_food_penguin[] =
  {
    EL_EMERALD,
    EL_BD_DIAMOND,
    EL_EMERALD_YELLOW,
    EL_EMERALD_RED,
    EL_EMERALD_PURPLE,
    EL_DIAMOND,
    EL_PEARL,
    EL_CRYSTAL,

    -1
  };

  static int ep_food_pig[] =
  {
    EL_EMERALD,
    EL_BD_DIAMOND,
    EL_EMERALD_YELLOW,
    EL_EMERALD_RED,
    EL_EMERALD_PURPLE,
    EL_DIAMOND,

    -1
  };

  static int ep_historic_wall[] =
  {
    EL_STEELWALL,
    EL_GATE_1,
    EL_GATE_2,
    EL_GATE_3,
    EL_GATE_4,
    EL_GATE_1_GRAY,
    EL_GATE_2_GRAY,
    EL_GATE_3_GRAY,
    EL_GATE_4_GRAY,
    EL_GATE_1_GRAY_ACTIVE,
    EL_GATE_2_GRAY_ACTIVE,
    EL_GATE_3_GRAY_ACTIVE,
    EL_GATE_4_GRAY_ACTIVE,
    EL_EM_GATE_1,
    EL_EM_GATE_2,
    EL_EM_GATE_3,
    EL_EM_GATE_4,
    EL_EM_GATE_1_GRAY,
    EL_EM_GATE_2_GRAY,
    EL_EM_GATE_3_GRAY,
    EL_EM_GATE_4_GRAY,
    EL_EM_GATE_1_GRAY_ACTIVE,
    EL_EM_GATE_2_GRAY_ACTIVE,
    EL_EM_GATE_3_GRAY_ACTIVE,
    EL_EM_GATE_4_GRAY_ACTIVE,
    EL_EXIT_CLOSED,
    EL_EXIT_OPENING,
    EL_EXIT_OPEN,
    EL_WALL,
    EL_WALL_SLIPPERY,
    EL_EXPANDABLE_WALL,
    EL_EXPANDABLE_WALL_HORIZONTAL,
    EL_EXPANDABLE_WALL_VERTICAL,
    EL_EXPANDABLE_WALL_ANY,
    EL_EXPANDABLE_WALL_GROWING,
    EL_BD_EXPANDABLE_WALL,
    EL_BD_WALL,
    EL_SP_CHIP_SINGLE,
    EL_SP_CHIP_LEFT,
    EL_SP_CHIP_RIGHT,
    EL_SP_CHIP_TOP,
    EL_SP_CHIP_BOTTOM,
    EL_SP_HARDWARE_GRAY,
    EL_SP_HARDWARE_GREEN,
    EL_SP_HARDWARE_BLUE,
    EL_SP_HARDWARE_RED,
    EL_SP_HARDWARE_YELLOW,
    EL_SP_HARDWARE_BASE_1,
    EL_SP_HARDWARE_BASE_2,
    EL_SP_HARDWARE_BASE_3,
    EL_SP_HARDWARE_BASE_4,
    EL_SP_HARDWARE_BASE_5,
    EL_SP_HARDWARE_BASE_6,
    EL_SP_TERMINAL,
    EL_SP_TERMINAL_ACTIVE,
    EL_SP_EXIT_CLOSED,
    EL_SP_EXIT_OPEN,
    EL_INVISIBLE_STEELWALL,
    EL_INVISIBLE_STEELWALL_ACTIVE,
    EL_INVISIBLE_WALL,
    EL_INVISIBLE_WALL_ACTIVE,
    EL_STEELWALL_SLIPPERY,
    EL_EMC_STEELWALL_1,
    EL_EMC_STEELWALL_2,
    EL_EMC_STEELWALL_3,
    EL_EMC_STEELWALL_4,
    EL_EMC_WALL_1,
    EL_EMC_WALL_2,
    EL_EMC_WALL_3,
    EL_EMC_WALL_4,
    EL_EMC_WALL_5,
    EL_EMC_WALL_6,
    EL_EMC_WALL_7,
    EL_EMC_WALL_8,

    -1
  };

  static int ep_historic_solid[] =
  {
    EL_WALL,
    EL_EXPANDABLE_WALL,
    EL_EXPANDABLE_WALL_HORIZONTAL,
    EL_EXPANDABLE_WALL_VERTICAL,
    EL_EXPANDABLE_WALL_ANY,
    EL_BD_EXPANDABLE_WALL,
    EL_BD_WALL,
    EL_WALL_SLIPPERY,
    EL_EXIT_CLOSED,
    EL_EXIT_OPENING,
    EL_EXIT_OPEN,
    EL_AMOEBA_DEAD,
    EL_AMOEBA_WET,
    EL_AMOEBA_DRY,
    EL_AMOEBA_FULL,
    EL_BD_AMOEBA,
    EL_QUICKSAND_EMPTY,
    EL_QUICKSAND_FULL,
    EL_QUICKSAND_FILLING,
    EL_QUICKSAND_EMPTYING,
    EL_MAGIC_WALL,
    EL_MAGIC_WALL_ACTIVE,
    EL_MAGIC_WALL_EMPTYING,
    EL_MAGIC_WALL_FILLING,
    EL_MAGIC_WALL_FULL,
    EL_MAGIC_WALL_DEAD,
    EL_BD_MAGIC_WALL,
    EL_BD_MAGIC_WALL_ACTIVE,
    EL_BD_MAGIC_WALL_EMPTYING,
    EL_BD_MAGIC_WALL_FULL,
    EL_BD_MAGIC_WALL_FILLING,
    EL_BD_MAGIC_WALL_DEAD,
    EL_GAME_OF_LIFE,
    EL_BIOMAZE,
    EL_SP_CHIP_SINGLE,
    EL_SP_CHIP_LEFT,
    EL_SP_CHIP_RIGHT,
    EL_SP_CHIP_TOP,
    EL_SP_CHIP_BOTTOM,
    EL_SP_TERMINAL,
    EL_SP_TERMINAL_ACTIVE,
    EL_SP_EXIT_CLOSED,
    EL_SP_EXIT_OPEN,
    EL_INVISIBLE_WALL,
    EL_INVISIBLE_WALL_ACTIVE,
    EL_SWITCHGATE_SWITCH_UP,
    EL_SWITCHGATE_SWITCH_DOWN,
    EL_TIMEGATE_SWITCH,
    EL_TIMEGATE_SWITCH_ACTIVE,
    EL_EMC_WALL_1,
    EL_EMC_WALL_2,
    EL_EMC_WALL_3,
    EL_EMC_WALL_4,
    EL_EMC_WALL_5,
    EL_EMC_WALL_6,
    EL_EMC_WALL_7,
    EL_EMC_WALL_8,
    EL_WALL_PEARL,
    EL_WALL_CRYSTAL,

    // the following elements are a direct copy of "indestructible" elements,
    // except "EL_ACID", which is "indestructible", but not "solid"!
#if 0
    EL_ACID,
#endif
    EL_STEELWALL,
    EL_ACID_POOL_TOPLEFT,
    EL_ACID_POOL_TOPRIGHT,
    EL_ACID_POOL_BOTTOMLEFT,
    EL_ACID_POOL_BOTTOM,
    EL_ACID_POOL_BOTTOMRIGHT,
    EL_SP_HARDWARE_GRAY,
    EL_SP_HARDWARE_GREEN,
    EL_SP_HARDWARE_BLUE,
    EL_SP_HARDWARE_RED,
    EL_SP_HARDWARE_YELLOW,
    EL_SP_HARDWARE_BASE_1,
    EL_SP_HARDWARE_BASE_2,
    EL_SP_HARDWARE_BASE_3,
    EL_SP_HARDWARE_BASE_4,
    EL_SP_HARDWARE_BASE_5,
    EL_SP_HARDWARE_BASE_6,
    EL_INVISIBLE_STEELWALL,
    EL_INVISIBLE_STEELWALL_ACTIVE,
    EL_CONVEYOR_BELT_1_SWITCH_LEFT,
    EL_CONVEYOR_BELT_1_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_1_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_2_SWITCH_LEFT,
    EL_CONVEYOR_BELT_2_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_2_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_3_SWITCH_LEFT,
    EL_CONVEYOR_BELT_3_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_3_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_4_SWITCH_LEFT,
    EL_CONVEYOR_BELT_4_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_4_SWITCH_RIGHT,
    EL_LIGHT_SWITCH,
    EL_LIGHT_SWITCH_ACTIVE,
    EL_SIGN_EXCLAMATION,
    EL_SIGN_RADIOACTIVITY,
    EL_SIGN_STOP,
    EL_SIGN_WHEELCHAIR,
    EL_SIGN_PARKING,
    EL_SIGN_NO_ENTRY,
    EL_SIGN_UNUSED_1,
    EL_SIGN_GIVE_WAY,
    EL_SIGN_ENTRY_FORBIDDEN,
    EL_SIGN_EMERGENCY_EXIT,
    EL_SIGN_YIN_YANG,
    EL_SIGN_UNUSED_2,
    EL_SIGN_SPERMS,
    EL_SIGN_BULLET,
    EL_SIGN_HEART,
    EL_SIGN_CROSS,
    EL_SIGN_FRANKIE,
    EL_STEEL_EXIT_CLOSED,
    EL_STEEL_EXIT_OPEN,
    EL_STEEL_EXIT_OPENING,
    EL_STEEL_EXIT_CLOSING,
    EL_EM_STEEL_EXIT_CLOSED,
    EL_EM_STEEL_EXIT_OPEN,
    EL_EM_STEEL_EXIT_OPENING,
    EL_EM_STEEL_EXIT_CLOSING,
    EL_DC_STEELWALL_1_LEFT,
    EL_DC_STEELWALL_1_RIGHT,
    EL_DC_STEELWALL_1_TOP,
    EL_DC_STEELWALL_1_BOTTOM,
    EL_DC_STEELWALL_1_HORIZONTAL,
    EL_DC_STEELWALL_1_VERTICAL,
    EL_DC_STEELWALL_1_TOPLEFT,
    EL_DC_STEELWALL_1_TOPRIGHT,
    EL_DC_STEELWALL_1_BOTTOMLEFT,
    EL_DC_STEELWALL_1_BOTTOMRIGHT,
    EL_DC_STEELWALL_1_TOPLEFT_2,
    EL_DC_STEELWALL_1_TOPRIGHT_2,
    EL_DC_STEELWALL_1_BOTTOMLEFT_2,
    EL_DC_STEELWALL_1_BOTTOMRIGHT_2,
    EL_DC_STEELWALL_2_LEFT,
    EL_DC_STEELWALL_2_RIGHT,
    EL_DC_STEELWALL_2_TOP,
    EL_DC_STEELWALL_2_BOTTOM,
    EL_DC_STEELWALL_2_HORIZONTAL,
    EL_DC_STEELWALL_2_VERTICAL,
    EL_DC_STEELWALL_2_MIDDLE,
    EL_DC_STEELWALL_2_SINGLE,
    EL_STEELWALL_SLIPPERY,
    EL_EMC_STEELWALL_1,
    EL_EMC_STEELWALL_2,
    EL_EMC_STEELWALL_3,
    EL_EMC_STEELWALL_4,
    EL_CRYSTAL,
    EL_GATE_1,
    EL_GATE_2,
    EL_GATE_3,
    EL_GATE_4,
    EL_GATE_1_GRAY,
    EL_GATE_2_GRAY,
    EL_GATE_3_GRAY,
    EL_GATE_4_GRAY,
    EL_GATE_1_GRAY_ACTIVE,
    EL_GATE_2_GRAY_ACTIVE,
    EL_GATE_3_GRAY_ACTIVE,
    EL_GATE_4_GRAY_ACTIVE,
    EL_EM_GATE_1,
    EL_EM_GATE_2,
    EL_EM_GATE_3,
    EL_EM_GATE_4,
    EL_EM_GATE_1_GRAY,
    EL_EM_GATE_2_GRAY,
    EL_EM_GATE_3_GRAY,
    EL_EM_GATE_4_GRAY,
    EL_EM_GATE_1_GRAY_ACTIVE,
    EL_EM_GATE_2_GRAY_ACTIVE,
    EL_EM_GATE_3_GRAY_ACTIVE,
    EL_EM_GATE_4_GRAY_ACTIVE,
    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_EMC_GATE_5_GRAY_ACTIVE,
    EL_EMC_GATE_6_GRAY_ACTIVE,
    EL_EMC_GATE_7_GRAY_ACTIVE,
    EL_EMC_GATE_8_GRAY_ACTIVE,
    EL_DC_GATE_WHITE,
    EL_DC_GATE_WHITE_GRAY,
    EL_DC_GATE_WHITE_GRAY_ACTIVE,
    EL_DC_GATE_FAKE_GRAY,
    EL_SWITCHGATE_OPEN,
    EL_SWITCHGATE_OPENING,
    EL_SWITCHGATE_CLOSED,
    EL_SWITCHGATE_CLOSING,
    EL_DC_SWITCHGATE_SWITCH_UP,
    EL_DC_SWITCHGATE_SWITCH_DOWN,
    EL_TIMEGATE_OPEN,
    EL_TIMEGATE_OPENING,
    EL_TIMEGATE_CLOSED,
    EL_TIMEGATE_CLOSING,
    EL_DC_TIMEGATE_SWITCH,
    EL_DC_TIMEGATE_SWITCH_ACTIVE,
    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,
    EL_EXPANDABLE_STEELWALL_HORIZONTAL,
    EL_EXPANDABLE_STEELWALL_VERTICAL,
    EL_EXPANDABLE_STEELWALL_ANY,

    -1
  };

  static int ep_classic_enemy[] =
  {
    EL_BUG,
    EL_SPACESHIP,
    EL_BD_BUTTERFLY,
    EL_BD_FIREFLY,

    EL_YAMYAM,
    EL_DARK_YAMYAM,
    EL_ROBOT,
    EL_PACMAN,
    EL_SP_SNIKSNAK,
    EL_SP_ELECTRON,

    -1
  };

  static int ep_belt[] =
  {
    EL_CONVEYOR_BELT_1_LEFT,
    EL_CONVEYOR_BELT_1_MIDDLE,
    EL_CONVEYOR_BELT_1_RIGHT,
    EL_CONVEYOR_BELT_2_LEFT,
    EL_CONVEYOR_BELT_2_MIDDLE,
    EL_CONVEYOR_BELT_2_RIGHT,
    EL_CONVEYOR_BELT_3_LEFT,
    EL_CONVEYOR_BELT_3_MIDDLE,
    EL_CONVEYOR_BELT_3_RIGHT,
    EL_CONVEYOR_BELT_4_LEFT,
    EL_CONVEYOR_BELT_4_MIDDLE,
    EL_CONVEYOR_BELT_4_RIGHT,

    -1
  };

  static int ep_belt_active[] =
  {
    EL_CONVEYOR_BELT_1_LEFT_ACTIVE,
    EL_CONVEYOR_BELT_1_MIDDLE_ACTIVE,
    EL_CONVEYOR_BELT_1_RIGHT_ACTIVE,
    EL_CONVEYOR_BELT_2_LEFT_ACTIVE,
    EL_CONVEYOR_BELT_2_MIDDLE_ACTIVE,
    EL_CONVEYOR_BELT_2_RIGHT_ACTIVE,
    EL_CONVEYOR_BELT_3_LEFT_ACTIVE,
    EL_CONVEYOR_BELT_3_MIDDLE_ACTIVE,
    EL_CONVEYOR_BELT_3_RIGHT_ACTIVE,
    EL_CONVEYOR_BELT_4_LEFT_ACTIVE,
    EL_CONVEYOR_BELT_4_MIDDLE_ACTIVE,
    EL_CONVEYOR_BELT_4_RIGHT_ACTIVE,

    -1
  };

  static int ep_belt_switch[] =
  {
    EL_CONVEYOR_BELT_1_SWITCH_LEFT,
    EL_CONVEYOR_BELT_1_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_1_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_2_SWITCH_LEFT,
    EL_CONVEYOR_BELT_2_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_2_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_3_SWITCH_LEFT,
    EL_CONVEYOR_BELT_3_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_3_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_4_SWITCH_LEFT,
    EL_CONVEYOR_BELT_4_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_4_SWITCH_RIGHT,

    -1
  };

  static int ep_tube[] =
  {
    EL_TUBE_LEFT_UP,
    EL_TUBE_LEFT_DOWN,
    EL_TUBE_RIGHT_UP,
    EL_TUBE_RIGHT_DOWN,
    EL_TUBE_HORIZONTAL,
    EL_TUBE_HORIZONTAL_UP,
    EL_TUBE_HORIZONTAL_DOWN,
    EL_TUBE_VERTICAL,
    EL_TUBE_VERTICAL_LEFT,
    EL_TUBE_VERTICAL_RIGHT,
    EL_TUBE_ANY,

    -1
  };

  static int ep_acid_pool[] =
  {
    EL_ACID_POOL_TOPLEFT,
    EL_ACID_POOL_TOPRIGHT,
    EL_ACID_POOL_BOTTOMLEFT,
    EL_ACID_POOL_BOTTOM,
    EL_ACID_POOL_BOTTOMRIGHT,

    -1
  };

  static int ep_keygate[] =
  {
    EL_GATE_1,
    EL_GATE_2,
    EL_GATE_3,
    EL_GATE_4,
    EL_GATE_1_GRAY,
    EL_GATE_2_GRAY,
    EL_GATE_3_GRAY,
    EL_GATE_4_GRAY,
    EL_GATE_1_GRAY_ACTIVE,
    EL_GATE_2_GRAY_ACTIVE,
    EL_GATE_3_GRAY_ACTIVE,
    EL_GATE_4_GRAY_ACTIVE,
    EL_EM_GATE_1,
    EL_EM_GATE_2,
    EL_EM_GATE_3,
    EL_EM_GATE_4,
    EL_EM_GATE_1_GRAY,
    EL_EM_GATE_2_GRAY,
    EL_EM_GATE_3_GRAY,
    EL_EM_GATE_4_GRAY,
    EL_EM_GATE_1_GRAY_ACTIVE,
    EL_EM_GATE_2_GRAY_ACTIVE,
    EL_EM_GATE_3_GRAY_ACTIVE,
    EL_EM_GATE_4_GRAY_ACTIVE,
    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_EMC_GATE_5_GRAY_ACTIVE,
    EL_EMC_GATE_6_GRAY_ACTIVE,
    EL_EMC_GATE_7_GRAY_ACTIVE,
    EL_EMC_GATE_8_GRAY_ACTIVE,
    EL_DC_GATE_WHITE,
    EL_DC_GATE_WHITE_GRAY,
    EL_DC_GATE_WHITE_GRAY_ACTIVE,

    -1
  };

  static int ep_amoeboid[] =
  {
    EL_AMOEBA_DEAD,
    EL_AMOEBA_WET,
    EL_AMOEBA_DRY,
    EL_AMOEBA_FULL,
    EL_BD_AMOEBA,
    EL_EMC_DRIPPER,

    -1
  };

  static int ep_amoebalive[] =
  {
    EL_AMOEBA_WET,
    EL_AMOEBA_DRY,
    EL_AMOEBA_FULL,
    EL_BD_AMOEBA,
    EL_EMC_DRIPPER,

    -1
  };

  static int ep_has_editor_content[] =
  {
    EL_PLAYER_1,
    EL_PLAYER_2,
    EL_PLAYER_3,
    EL_PLAYER_4,
    EL_SOKOBAN_FIELD_PLAYER,
    EL_SP_MURPHY,
    EL_YAMYAM,
    EL_YAMYAM_LEFT,
    EL_YAMYAM_RIGHT,
    EL_YAMYAM_UP,
    EL_YAMYAM_DOWN,
    EL_AMOEBA_WET,
    EL_AMOEBA_DRY,
    EL_AMOEBA_FULL,
    EL_BD_AMOEBA,
    EL_BDX_AMOEBA_1,
    EL_BDX_AMOEBA_2,
    EL_BDX_SLIME,
    EL_BDX_ACID,
    EL_BDX_BITER,
    EL_BDX_BITER_RIGHT,
    EL_BDX_BITER_UP,
    EL_BDX_BITER_LEFT,
    EL_BDX_BITER_DOWN,
    EL_BDX_BUBBLE,
    EL_BDX_NUT,
    EL_EMC_MAGIC_BALL,
    EL_EMC_ANDROID,
    EL_MM_GRAY_BALL,

    -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,
    EL_EMC_DRIPPER,

    -1
  };

  static int ep_active_bomb[] =
  {
    EL_DYNAMITE_ACTIVE,
    EL_EM_DYNAMITE_ACTIVE,
    EL_DYNABOMB_PLAYER_1_ACTIVE,
    EL_DYNABOMB_PLAYER_2_ACTIVE,
    EL_DYNABOMB_PLAYER_3_ACTIVE,
    EL_DYNABOMB_PLAYER_4_ACTIVE,
    EL_SP_DISK_RED_ACTIVE,

    -1
  };

  static int ep_inactive[] =
  {
    EL_EMPTY,
    EL_EMPTY_SPACE_1,
    EL_EMPTY_SPACE_2,
    EL_EMPTY_SPACE_3,
    EL_EMPTY_SPACE_4,
    EL_EMPTY_SPACE_5,
    EL_EMPTY_SPACE_6,
    EL_EMPTY_SPACE_7,
    EL_EMPTY_SPACE_8,
    EL_EMPTY_SPACE_9,
    EL_EMPTY_SPACE_10,
    EL_EMPTY_SPACE_11,
    EL_EMPTY_SPACE_12,
    EL_EMPTY_SPACE_13,
    EL_EMPTY_SPACE_14,
    EL_EMPTY_SPACE_15,
    EL_EMPTY_SPACE_16,
    EL_SAND,
    EL_WALL,
    EL_BD_WALL,
    EL_WALL_SLIPPERY,
    EL_STEELWALL,
    EL_AMOEBA_DEAD,
    EL_QUICKSAND_EMPTY,
    EL_QUICKSAND_FAST_EMPTY,
    EL_STONEBLOCK,
    EL_ROBOT_WHEEL,
    EL_KEY_1,
    EL_KEY_2,
    EL_KEY_3,
    EL_KEY_4,
    EL_EM_KEY_1,
    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,
    EL_GATE_4,
    EL_GATE_1_GRAY,
    EL_GATE_2_GRAY,
    EL_GATE_3_GRAY,
    EL_GATE_4_GRAY,
    EL_GATE_1_GRAY_ACTIVE,
    EL_GATE_2_GRAY_ACTIVE,
    EL_GATE_3_GRAY_ACTIVE,
    EL_GATE_4_GRAY_ACTIVE,
    EL_EM_GATE_1,
    EL_EM_GATE_2,
    EL_EM_GATE_3,
    EL_EM_GATE_4,
    EL_EM_GATE_1_GRAY,
    EL_EM_GATE_2_GRAY,
    EL_EM_GATE_3_GRAY,
    EL_EM_GATE_4_GRAY,
    EL_EM_GATE_1_GRAY_ACTIVE,
    EL_EM_GATE_2_GRAY_ACTIVE,
    EL_EM_GATE_3_GRAY_ACTIVE,
    EL_EM_GATE_4_GRAY_ACTIVE,
    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_EMC_GATE_5_GRAY_ACTIVE,
    EL_EMC_GATE_6_GRAY_ACTIVE,
    EL_EMC_GATE_7_GRAY_ACTIVE,
    EL_EMC_GATE_8_GRAY_ACTIVE,
    EL_DC_GATE_WHITE,
    EL_DC_GATE_WHITE_GRAY,
    EL_DC_GATE_WHITE_GRAY_ACTIVE,
    EL_DC_GATE_FAKE_GRAY,
    EL_DYNAMITE,
    EL_EM_DYNAMITE,
    EL_INVISIBLE_STEELWALL,
    EL_INVISIBLE_WALL,
    EL_INVISIBLE_SAND,
    EL_LAMP,
    EL_LAMP_ACTIVE,
    EL_WALL_EMERALD,
    EL_WALL_DIAMOND,
    EL_WALL_BD_DIAMOND,
    EL_WALL_EMERALD_YELLOW,
    EL_DYNABOMB_INCREASE_NUMBER,
    EL_DYNABOMB_INCREASE_SIZE,
    EL_DYNABOMB_INCREASE_POWER,
#if 0
    EL_SOKOBAN_OBJECT,
#endif
    EL_SOKOBAN_FIELD_EMPTY,
    EL_SOKOBAN_FIELD_FULL,
    EL_WALL_EMERALD_RED,
    EL_WALL_EMERALD_PURPLE,
    EL_ACID_POOL_TOPLEFT,
    EL_ACID_POOL_TOPRIGHT,
    EL_ACID_POOL_BOTTOMLEFT,
    EL_ACID_POOL_BOTTOM,
    EL_ACID_POOL_BOTTOMRIGHT,
    EL_MAGIC_WALL,
    EL_MAGIC_WALL_DEAD,
    EL_BD_MAGIC_WALL,
    EL_BD_MAGIC_WALL_DEAD,
    EL_DC_MAGIC_WALL,
    EL_DC_MAGIC_WALL_DEAD,
    EL_AMOEBA_TO_DIAMOND,
    EL_BLOCKED,
    EL_SP_EMPTY,
    EL_SP_BASE,
    EL_SP_PORT_RIGHT,
    EL_SP_PORT_DOWN,
    EL_SP_PORT_LEFT,
    EL_SP_PORT_UP,
    EL_SP_GRAVITY_PORT_RIGHT,
    EL_SP_GRAVITY_PORT_DOWN,
    EL_SP_GRAVITY_PORT_LEFT,
    EL_SP_GRAVITY_PORT_UP,
    EL_SP_PORT_HORIZONTAL,
    EL_SP_PORT_VERTICAL,
    EL_SP_PORT_ANY,
    EL_SP_DISK_RED,
#if 0
    EL_SP_DISK_YELLOW,
#endif
    EL_SP_CHIP_SINGLE,
    EL_SP_CHIP_LEFT,
    EL_SP_CHIP_RIGHT,
    EL_SP_CHIP_TOP,
    EL_SP_CHIP_BOTTOM,
    EL_SP_HARDWARE_GRAY,
    EL_SP_HARDWARE_GREEN,
    EL_SP_HARDWARE_BLUE,
    EL_SP_HARDWARE_RED,
    EL_SP_HARDWARE_YELLOW,
    EL_SP_HARDWARE_BASE_1,
    EL_SP_HARDWARE_BASE_2,
    EL_SP_HARDWARE_BASE_3,
    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,
    EL_CONVEYOR_BELT_2_SWITCH_LEFT,
    EL_CONVEYOR_BELT_2_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_2_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_3_SWITCH_LEFT,
    EL_CONVEYOR_BELT_3_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_3_SWITCH_RIGHT,
    EL_CONVEYOR_BELT_4_SWITCH_LEFT,
    EL_CONVEYOR_BELT_4_SWITCH_MIDDLE,
    EL_CONVEYOR_BELT_4_SWITCH_RIGHT,
    EL_SIGN_EXCLAMATION,
    EL_SIGN_RADIOACTIVITY,
    EL_SIGN_STOP,
    EL_SIGN_WHEELCHAIR,
    EL_SIGN_PARKING,
    EL_SIGN_NO_ENTRY,
    EL_SIGN_UNUSED_1,
    EL_SIGN_GIVE_WAY,
    EL_SIGN_ENTRY_FORBIDDEN,
    EL_SIGN_EMERGENCY_EXIT,
    EL_SIGN_YIN_YANG,
    EL_SIGN_UNUSED_2,
    EL_SIGN_SPERMS,
    EL_SIGN_BULLET,
    EL_SIGN_HEART,
    EL_SIGN_CROSS,
    EL_SIGN_FRANKIE,
    EL_DC_STEELWALL_1_LEFT,
    EL_DC_STEELWALL_1_RIGHT,
    EL_DC_STEELWALL_1_TOP,
    EL_DC_STEELWALL_1_BOTTOM,
    EL_DC_STEELWALL_1_HORIZONTAL,
    EL_DC_STEELWALL_1_VERTICAL,
    EL_DC_STEELWALL_1_TOPLEFT,
    EL_DC_STEELWALL_1_TOPRIGHT,
    EL_DC_STEELWALL_1_BOTTOMLEFT,
    EL_DC_STEELWALL_1_BOTTOMRIGHT,
    EL_DC_STEELWALL_1_TOPLEFT_2,
    EL_DC_STEELWALL_1_TOPRIGHT_2,
    EL_DC_STEELWALL_1_BOTTOMLEFT_2,
    EL_DC_STEELWALL_1_BOTTOMRIGHT_2,
    EL_DC_STEELWALL_2_LEFT,
    EL_DC_STEELWALL_2_RIGHT,
    EL_DC_STEELWALL_2_TOP,
    EL_DC_STEELWALL_2_BOTTOM,
    EL_DC_STEELWALL_2_HORIZONTAL,
    EL_DC_STEELWALL_2_VERTICAL,
    EL_DC_STEELWALL_2_MIDDLE,
    EL_DC_STEELWALL_2_SINGLE,
    EL_STEELWALL_SLIPPERY,
    EL_EMC_STEELWALL_1,
    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,
    EL_EMC_WALL_4,
    EL_EMC_WALL_5,
    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
  };

  static int ep_em_slippery_wall[] =
  {
    -1
  };

  static int ep_gfx_crumbled[] =
  {
    EL_SAND,
    EL_LANDMINE,
    EL_DC_LANDMINE,
    EL_TRAP,
    EL_TRAP_ACTIVE,

    -1
  };

  static int ep_editor_cascade_active[] =
  {
    EL_INTERNAL_CASCADE_BD_ACTIVE,
    EL_INTERNAL_CASCADE_BDX_ACTIVE,
    EL_INTERNAL_CASCADE_BDX_EFFECTS_ACTIVE,
    EL_INTERNAL_CASCADE_BDX_SCANNED_ACTIVE,
    EL_INTERNAL_CASCADE_BDX_KRISSZ_ACTIVE,
    EL_INTERNAL_CASCADE_EM_ACTIVE,
    EL_INTERNAL_CASCADE_EMC_ACTIVE,
    EL_INTERNAL_CASCADE_RND_ACTIVE,
    EL_INTERNAL_CASCADE_SB_ACTIVE,
    EL_INTERNAL_CASCADE_SP_ACTIVE,
    EL_INTERNAL_CASCADE_DC_ACTIVE,
    EL_INTERNAL_CASCADE_DX_ACTIVE,
    EL_INTERNAL_CASCADE_MM_ACTIVE,
    EL_INTERNAL_CASCADE_DF_ACTIVE,
    EL_INTERNAL_CASCADE_CHARS_ACTIVE,
    EL_INTERNAL_CASCADE_STEEL_CHARS_ACTIVE,
    EL_INTERNAL_CASCADE_CE_ACTIVE,
    EL_INTERNAL_CASCADE_GE_ACTIVE,
    EL_INTERNAL_CASCADE_ES_ACTIVE,
    EL_INTERNAL_CASCADE_REF_ACTIVE,
    EL_INTERNAL_CASCADE_USER_ACTIVE,
    EL_INTERNAL_CASCADE_DYNAMIC_ACTIVE,

    -1
  };

  static int ep_editor_cascade_inactive[] =
  {
    EL_INTERNAL_CASCADE_BD,
    EL_INTERNAL_CASCADE_BDX,
    EL_INTERNAL_CASCADE_BDX_EFFECTS,
    EL_INTERNAL_CASCADE_BDX_SCANNED,
    EL_INTERNAL_CASCADE_BDX_KRISSZ,
    EL_INTERNAL_CASCADE_EM,
    EL_INTERNAL_CASCADE_EMC,
    EL_INTERNAL_CASCADE_RND,
    EL_INTERNAL_CASCADE_SB,
    EL_INTERNAL_CASCADE_SP,
    EL_INTERNAL_CASCADE_DC,
    EL_INTERNAL_CASCADE_DX,
    EL_INTERNAL_CASCADE_MM,
    EL_INTERNAL_CASCADE_DF,
    EL_INTERNAL_CASCADE_CHARS,
    EL_INTERNAL_CASCADE_STEEL_CHARS,
    EL_INTERNAL_CASCADE_CE,
    EL_INTERNAL_CASCADE_GE,
    EL_INTERNAL_CASCADE_ES,
    EL_INTERNAL_CASCADE_REF,
    EL_INTERNAL_CASCADE_USER,
    EL_INTERNAL_CASCADE_DYNAMIC,

    -1
  };

  static int ep_obsolete[] =
  {
    EL_PLAYER_OBSOLETE,
    EL_KEY_OBSOLETE,
    EL_EM_KEY_1_FILE_OBSOLETE,
    EL_EM_KEY_2_FILE_OBSOLETE,
    EL_EM_KEY_3_FILE_OBSOLETE,
    EL_EM_KEY_4_FILE_OBSOLETE,
    EL_ENVELOPE_OBSOLETE,

    -1
  };

  static struct
  {
    int *elements;
    int property;
  } element_properties[] =
  {
    { ep_diggable,			EP_DIGGABLE			},
    { ep_collectible_only,		EP_COLLECTIBLE_ONLY		},
    { ep_dont_run_into,			EP_DONT_RUN_INTO		},
    { ep_dont_collide_with,		EP_DONT_COLLIDE_WITH		},
    { ep_dont_touch,			EP_DONT_TOUCH			},
    { ep_indestructible,		EP_INDESTRUCTIBLE		},
    { ep_slippery,			EP_SLIPPERY			},
    { ep_can_change,			EP_CAN_CHANGE			},
    { ep_can_move,			EP_CAN_MOVE			},
    { ep_can_fall,			EP_CAN_FALL			},
    { 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_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		},
    { ep_passable_over,			EP_PASSABLE_OVER		},
    { ep_passable_inside,		EP_PASSABLE_INSIDE		},
    { ep_passable_under,		EP_PASSABLE_UNDER		},
    { ep_droppable,			EP_DROPPABLE			},
    { ep_explodes_1x1_old,		EP_EXPLODES_1X1_OLD		},
    { ep_pushable,			EP_PUSHABLE			},
    { 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_empty_space,			EP_EMPTY_SPACE			},
    { ep_player,			EP_PLAYER			},
    { ep_can_pass_magic_wall,		EP_CAN_PASS_MAGIC_WALL		},
    { ep_can_pass_dc_magic_wall,	EP_CAN_PASS_DC_MAGIC_WALL	},
    { ep_switchable,			EP_SWITCHABLE			},
    { ep_bd_element,			EP_BD_ELEMENT			},
    { ep_sp_element,			EP_SP_ELEMENT			},
    { ep_sb_element,			EP_SB_ELEMENT			},
    { ep_gem,				EP_GEM				},
    { ep_food_dark_yamyam,		EP_FOOD_DARK_YAMYAM		},
    { ep_food_penguin,			EP_FOOD_PENGUIN			},
    { ep_food_pig,			EP_FOOD_PIG			},
    { ep_historic_wall,			EP_HISTORIC_WALL		},
    { ep_historic_solid,		EP_HISTORIC_SOLID		},
    { ep_classic_enemy,			EP_CLASSIC_ENEMY		},
    { ep_belt,				EP_BELT				},
    { ep_belt_active,			EP_BELT_ACTIVE			},
    { ep_belt_switch,			EP_BELT_SWITCH			},
    { ep_tube,				EP_TUBE				},
    { ep_acid_pool,			EP_ACID_POOL			},
    { ep_keygate,			EP_KEYGATE			},
    { ep_amoeboid,			EP_AMOEBOID			},
    { ep_amoebalive,			EP_AMOEBALIVE			},
    { ep_has_editor_content,		EP_HAS_EDITOR_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			},

    { ep_em_slippery_wall,		EP_EM_SLIPPERY_WALL		},

    { ep_gfx_crumbled,			EP_GFX_CRUMBLED			},

    { ep_editor_cascade_active,		EP_EDITOR_CASCADE_ACTIVE	},
    { ep_editor_cascade_inactive, 	EP_EDITOR_CASCADE_INACTIVE	},

    { ep_obsolete,		 	EP_OBSOLETE			},

    { NULL,				-1				}
  };

  int i, j, k;

  // always start with reliable default values (element has no properties)
  // (but never initialize clipboard elements after the very first time)
  // (to be able to use clipboard elements between several levels)
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
    if (!IS_CLIPBOARD_ELEMENT(i) || !clipboard_elements_initialized)
      for (j = 0; j < NUM_ELEMENT_PROPERTIES; j++)
	SET_PROPERTY(i, j, FALSE);

  // set all base element properties from above array definitions
  for (i = 0; element_properties[i].elements != NULL; i++)
    for (j = 0; (element_properties[i].elements)[j] != -1; j++)
      SET_PROPERTY((element_properties[i].elements)[j], element_properties[i].property, TRUE);

  // copy properties to some elements that are only stored in level file
  for (i = 0; i < NUM_ELEMENT_PROPERTIES; i++)
    for (j = 0; copy_properties[j][0] != -1; j++)
      if (HAS_PROPERTY(copy_properties[j][0], i))
	for (k = 1; k <= 4; k++)
	  SET_PROPERTY(copy_properties[j][k], i, TRUE);

  // set static element properties that are not listed in array definitions
  for (i = EL_STEEL_CHAR_START; i <= EL_STEEL_CHAR_END; i++)
    SET_PROPERTY(i, EP_INDESTRUCTIBLE, TRUE);

  clipboard_elements_initialized = TRUE;
}

void InitElementPropertiesEngine(VersionType engine_version)
{
  static int no_wall_properties[] =
  {
    EP_DIGGABLE,
    EP_COLLECTIBLE_ONLY,
    EP_DONT_RUN_INTO,
    EP_DONT_COLLIDE_WITH,
    EP_CAN_MOVE,
    EP_CAN_FALL,
    EP_CAN_SMASH_PLAYER,
    EP_CAN_SMASH_ENEMIES,
    EP_CAN_SMASH_EVERYTHING,
    EP_PUSHABLE,

    EP_PLAYER,
    EP_GEM,
    EP_FOOD_DARK_YAMYAM,
    EP_FOOD_PENGUIN,
    EP_BELT,
    EP_BELT_ACTIVE,
    EP_TUBE,
    EP_AMOEBOID,
    EP_AMOEBALIVE,
    EP_ACTIVE_BOMB,

    EP_ACCESSIBLE,

    -1
  };

  int i, j;

  /* 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
     property (which means that conditional property changes must be set to
     a reliable default value before) */

  // resolve group elements
  for (i = 0; i < NUM_GROUP_ELEMENTS; i++)
    ResolveGroupElement(EL_GROUP_START + i);

  // set all special, combined or engine dependent element properties
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
  {
    // do not change (already initialized) clipboard elements here
    if (IS_CLIPBOARD_ELEMENT(i))
      continue;

    // ---------- INACTIVE ----------------------------------------------------
    SET_PROPERTY(i, EP_INACTIVE, ((i >= EL_CHAR_START &&
				   i <= EL_CHAR_END) ||
				  (i >= EL_STEEL_CHAR_START &&
				   i <= EL_STEEL_CHAR_END)));

    // ---------- WALKABLE, PASSABLE, ACCESSIBLE ------------------------------
    SET_PROPERTY(i, EP_WALKABLE, (IS_WALKABLE_OVER(i) ||
				  IS_WALKABLE_INSIDE(i) ||
				  IS_WALKABLE_UNDER(i)));

    SET_PROPERTY(i, EP_PASSABLE, (IS_PASSABLE_OVER(i) ||
				  IS_PASSABLE_INSIDE(i) ||
				  IS_PASSABLE_UNDER(i)));

    SET_PROPERTY(i, EP_ACCESSIBLE_OVER, (IS_WALKABLE_OVER(i) ||
					 IS_PASSABLE_OVER(i)));

    SET_PROPERTY(i, EP_ACCESSIBLE_INSIDE, (IS_WALKABLE_INSIDE(i) ||
					   IS_PASSABLE_INSIDE(i)));

    SET_PROPERTY(i, EP_ACCESSIBLE_UNDER, (IS_WALKABLE_UNDER(i) ||
					  IS_PASSABLE_UNDER(i)));

    SET_PROPERTY(i, EP_ACCESSIBLE, (IS_WALKABLE(i) ||
				    IS_PASSABLE(i)));

    // ---------- COLLECTIBLE -------------------------------------------------
    SET_PROPERTY(i, EP_COLLECTIBLE, (IS_COLLECTIBLE_ONLY(i) ||
				     IS_DROPPABLE(i) ||
				     IS_THROWABLE(i)));

    // ---------- SNAPPABLE ---------------------------------------------------
    SET_PROPERTY(i, EP_SNAPPABLE, (IS_DIGGABLE(i) ||
				   IS_COLLECTIBLE(i) ||
				   IS_SWITCHABLE(i) ||
				   i == EL_BD_ROCK));

    // ---------- WALL --------------------------------------------------------
    SET_PROPERTY(i, EP_WALL, TRUE);	// default: element is wall

    for (j = 0; no_wall_properties[j] != -1; j++)
      if (HAS_PROPERTY(i, no_wall_properties[j]) ||
	  i >= EL_FIRST_RUNTIME_UNREAL)
	SET_PROPERTY(i, EP_WALL, FALSE);

    if (IS_HISTORIC_WALL(i))
      SET_PROPERTY(i, EP_WALL, TRUE);

    // ---------- SOLID_FOR_PUSHING -------------------------------------------
    if (engine_version < VERSION_IDENT(2,2,0,0))
      SET_PROPERTY(i, EP_SOLID_FOR_PUSHING, IS_HISTORIC_SOLID(i));
    else
      SET_PROPERTY(i, EP_SOLID_FOR_PUSHING, (!IS_WALKABLE(i) &&
					     !IS_DIGGABLE(i) &&
					     !IS_COLLECTIBLE(i)));

    // ---------- DRAGONFIRE_PROOF --------------------------------------------
    if (IS_HISTORIC_SOLID(i) || i == EL_EXPLOSION)
      SET_PROPERTY(i, EP_DRAGONFIRE_PROOF, TRUE);
    else
      SET_PROPERTY(i, EP_DRAGONFIRE_PROOF, (IS_INDESTRUCTIBLE(i) &&
					    i != EL_ACID));

    // ---------- EXPLOSION_PROOF ---------------------------------------------
    if (i == EL_FLAMES)
      SET_PROPERTY(i, EP_EXPLOSION_PROOF, TRUE);
    else if (engine_version < VERSION_IDENT(2,2,0,0))
      SET_PROPERTY(i, EP_EXPLOSION_PROOF, IS_INDESTRUCTIBLE(i));
    else
      SET_PROPERTY(i, EP_EXPLOSION_PROOF, (IS_INDESTRUCTIBLE(i) &&
					   (!IS_WALKABLE(i) ||
					    IS_PROTECTED(i))));

    if (IS_CUSTOM_ELEMENT(i))
    {
      // these are additional properties which are initially false when set

      // ---------- DONT_COLLIDE_WITH / DONT_RUN_INTO -------------------------
      if (DONT_TOUCH(i))
	SET_PROPERTY(i, EP_DONT_COLLIDE_WITH, TRUE);
      if (DONT_COLLIDE_WITH(i))
	SET_PROPERTY(i, EP_DONT_RUN_INTO, TRUE);

      // ---------- CAN_SMASH_ENEMIES / CAN_SMASH_PLAYER ----------------------
      if (CAN_SMASH_EVERYTHING(i))
	SET_PROPERTY(i, EP_CAN_SMASH_ENEMIES, TRUE);
      if (CAN_SMASH_ENEMIES(i))
	SET_PROPERTY(i, EP_CAN_SMASH_PLAYER, TRUE);
    }

    // ---------- CAN_SMASH ---------------------------------------------------
    SET_PROPERTY(i, EP_CAN_SMASH, (CAN_SMASH_PLAYER(i) ||
				   CAN_SMASH_ENEMIES(i) ||
				   CAN_SMASH_EVERYTHING(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_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));

    // ---------- CAN_EXPLODE_BY_EXPLOSION ------------------------------------
    SET_PROPERTY(i, EP_CAN_EXPLODE_BY_EXPLOSION, (CAN_EXPLODE_BY_FIRE(i) ||
						  i == EL_BLACK_ORB));

    // ---------- COULD_MOVE_INTO_ACID ----------------------------------------
    SET_PROPERTY(i, EP_COULD_MOVE_INTO_ACID, (IS_PLAYER_ELEMENT(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 (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)));

    // ---------- CAN_BE_CLONED_BY_ANDROID ------------------------------------
    for (j = 0; j < level.num_android_clone_elements; j++)
      SET_PROPERTY(i, EP_CAN_BE_CLONED_BY_ANDROID,
		   (!IS_EMPTY(i) &&
		    IS_EQUAL_OR_IN_GROUP(i, level.android_clone_element[j])));

    // ---------- 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 ------------------------------------------------
    SET_PROPERTY(i, EP_GFX_CRUMBLED,
		 element_info[i].crumbled[ACTION_DEFAULT] !=
		 element_info[i].graphic[ACTION_DEFAULT]);

    // ---------- EDITOR_CASCADE ----------------------------------------------
    SET_PROPERTY(i, EP_EDITOR_CASCADE, (IS_EDITOR_CASCADE_ACTIVE(i) ||
					IS_EDITOR_CASCADE_INACTIVE(i)));
  }

  // dynamically adjust element properties according to game engine version
  {
    static int ep_em_slippery_wall[] =
    {
      EL_WALL,
      EL_STEELWALL,
      EL_EXPANDABLE_WALL,
      EL_EXPANDABLE_WALL_HORIZONTAL,
      EL_EXPANDABLE_WALL_VERTICAL,
      EL_EXPANDABLE_WALL_ANY,
      EL_EXPANDABLE_STEELWALL_HORIZONTAL,
      EL_EXPANDABLE_STEELWALL_VERTICAL,
      EL_EXPANDABLE_STEELWALL_ANY,
      EL_EXPANDABLE_STEELWALL_GROWING,
      -1
    };

    static int ep_em_explodes_by_fire[] =
    {
      EL_EM_DYNAMITE,
      EL_EM_DYNAMITE_ACTIVE,
      EL_MOLE,
      -1
    };

    // special EM style gems behaviour
    for (i = 0; ep_em_slippery_wall[i] != -1; i++)
      SET_PROPERTY(ep_em_slippery_wall[i], EP_EM_SLIPPERY_WALL, level.em_slippery_gems);

    // "EL_EXPANDABLE_WALL_GROWING" wasn't slippery for EM gems in 2.0.1
    SET_PROPERTY(EL_EXPANDABLE_WALL_GROWING, EP_EM_SLIPPERY_WALL,
		 (level.em_slippery_gems && engine_version > VERSION_IDENT(2,0,1,0)));

    // special EM style explosion behaviour regarding chain reactions
    for (i = 0; ep_em_explodes_by_fire[i] != -1; i++)
      SET_PROPERTY(ep_em_explodes_by_fire[i], EP_EXPLODES_BY_FIRE, level.em_explodes_by_fire);
  }

  // this is needed because some graphics depend on element properties
  if (game_status == GAME_MODE_PLAYING)
    InitElementGraphicInfo();
}

void InitElementPropertiesGfxElement(void)
{
  int i;

  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
  {
    struct ElementInfo *ei = &element_info[i];

    ei->gfx_element = (ei->use_gfx_element ? ei->gfx_element_initial : i);
  }
}

static void InitGlobal(void)
{
  int graphic;
  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)
      Fail("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;
  }

  for (i = 0; i < NUM_GLOBAL_ANIM_TOKENS + 1; i++)
  {
    // check if global_anim_name_info defined for each entry in "main.h"
    if (i < NUM_GLOBAL_ANIM_TOKENS &&
	global_anim_name_info[i].token_name == NULL)
      Fail("undefined 'global_anim_name_info' entry for anim %d", i);

    global_anim_info[i].token_name = global_anim_name_info[i].token_name;
  }

  // create hash to store URLs for global animations
  anim_url_hash = newSetupFileHash();

  // create hash from image config list
  image_config_hash = newSetupFileHash();
  for (i = 0; image_config[i].token != NULL; i++)
    setHashEntry(image_config_hash,
		 image_config[i].token,
		 image_config[i].value);

  // create hash from sound config list
  sound_config_hash = newSetupFileHash();
  for (i = 0; sound_config[i].token != NULL; i++)
    setHashEntry(sound_config_hash,
		 sound_config[i].token,
		 sound_config[i].value);

  // create hash from element token list
  element_token_hash = newSetupFileHash();
  for (i = 0; element_name_info[i].token_name != NULL; i++)
    setHashEntry(element_token_hash,
		 element_name_info[i].token_name,
		 int2str(i, 0));

  // create hash from graphic token list
  graphic_token_hash = newSetupFileHash();
  for (graphic = 0, i = 0; image_config[i].token != NULL; i++)
    if (strSuffix(image_config[i].value, ".png") ||
	strSuffix(image_config[i].value, ".pcx") ||
	strSuffix(image_config[i].value, ".wav") ||
	strEqual(image_config[i].value, UNDEFINED_FILENAME))
      setHashEntry(graphic_token_hash,
		   image_config[i].token,
		   int2str(graphic++, 0));

  // create hash from font token list
  font_token_hash = newSetupFileHash();
  for (i = 0; font_info[i].token_name != NULL; i++)
    setHashEntry(font_token_hash,
		 font_info[i].token_name,
		 int2str(i, 0));

  // set default filenames for all cloned graphics in static configuration
  for (i = 0; image_config[i].token != NULL; i++)
  {
    char *token = image_config[i].token;
    char *value = image_config[i].value;
    char *token_cloned = token;
    int num_references_followed = 0;
    int max_references_allowed = 10;

    // if image config entry has undefined filename, check for cloned graphics (recursively)
    while (strEqual(value, UNDEFINED_FILENAME) &&
           num_references_followed < max_references_allowed)
    {
      char *token_clone_from = getStringCat2(token_cloned, ".clone_from");

      token_cloned = getHashEntry(image_config_hash, token_clone_from);

      free(token_clone_from);

      if (token_cloned == NULL)
        break;

      value = getHashEntry(image_config_hash, token_cloned);

      num_references_followed++;
    }

    // if cloned graphics were found for undefined filename, update image config
    if (token_cloned != token && num_references_followed > 0)
    {
      if (token_cloned == NULL || value == NULL || strEqual(value, UNDEFINED_FILENAME))
      {
        Error("---");
        Error("inconsistent image config list information for cloned graphics:");

        if (num_references_followed >= max_references_allowed)
          Error("- '%s' cannot be resolved in %d steps (loop?)", token, max_references_allowed);
        else
          Error("- '%s' cannot be resolved to a valid image filename", token);

        Fail("please fix");
      }

      // set default filename in static configuration
      image_config[i].value = value;

      // set default filename in image config hash
      setHashEntry(image_config_hash, token, value);
    }
  }

  // always start with reliable default values (all elements)
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
    ActiveElement[i] = i;

  // now add all entries that have an active state (active elements)
  for (i = 0; element_with_active_state[i].element != -1; i++)
  {
    int element = element_with_active_state[i].element;
    int element_active = element_with_active_state[i].element_active;

    ActiveElement[element] = element_active;
  }

  // always start with reliable default values (all buttons)
  for (i = 0; i < NUM_IMAGE_FILES; i++)
    ActiveButton[i] = i;

  // now add all entries that have an active state (active buttons)
  for (i = 0; button_with_active_state[i].button != -1; i++)
  {
    int button = button_with_active_state[i].button;
    int button_active = button_with_active_state[i].button_active;

    ActiveButton[button] = button_active;
  }

  // always start with reliable default values (all fonts)
  for (i = 0; i < NUM_FONTS; i++)
    ActiveFont[i] = i;

  // now add all entries that have an active state (active fonts)
  for (i = 0; font_with_active_state[i].font_nr != -1; i++)
  {
    int font = font_with_active_state[i].font_nr;
    int font_active = font_with_active_state[i].font_nr_active;

    ActiveFont[font] = font_active;
  }

  global.autoplay_leveldir = NULL;
  global.patchtapes_leveldir = NULL;
  global.convert_leveldir = NULL;
  global.dumplevelset_leveldir = NULL;
  global.dumplevel_leveldir = NULL;
  global.dumptape_leveldir = NULL;
  global.create_sketch_images_dir = NULL;
  global.create_collect_images_dir = NULL;

  global.frames_per_second = 0;
  global.show_frames_per_second = FALSE;

  global.border_status = GAME_MODE_LOADING;
  global.anim_status = global.anim_status_next = GAME_MODE_LOADING;

  global.use_envelope_request = FALSE;
  global.uppercase_only = FALSE;

  global.user_names = NULL;
}

static void Execute_Command(char *command)
{
  int i;

  if (strEqual(command, "print graphicsinfo.conf"))
  {
    Print("# You can configure additional/alternative image files here.\n");
    Print("# (The entries below are default and therefore commented out.)\n");
    Print("\n");
    Print("%s\n", getFormattedSetupEntry("name", "Classic Graphics"));
    Print("\n");
    Print("%s\n", getFormattedSetupEntry("sort_priority", "100"));
    Print("\n");

    for (i = 0; image_config[i].token != NULL; i++)
      Print("# %s\n", getFormattedSetupEntry(image_config[i].token,
					     image_config[i].value));

    exit(0);
  }
  else if (strEqual(command, "print soundsinfo.conf"))
  {
    Print("# You can configure additional/alternative sound files here.\n");
    Print("# (The entries below are default and therefore commented out.)\n");
    Print("\n");
    Print("%s\n", getFormattedSetupEntry("name", "Classic Sounds"));
    Print("\n");
    Print("%s\n", getFormattedSetupEntry("sort_priority", "100"));
    Print("\n");

    for (i = 0; sound_config[i].token != NULL; i++)
      Print("# %s\n", getFormattedSetupEntry(sound_config[i].token,
					     sound_config[i].value));

    exit(0);
  }
  else if (strEqual(command, "print musicinfo.conf"))
  {
    Print("# You can configure additional/alternative music files here.\n");
    Print("# (The entries below are default and therefore commented out.)\n");
    Print("\n");
    Print("%s\n", getFormattedSetupEntry("name", "Classic Music"));
    Print("\n");
    Print("%s\n", getFormattedSetupEntry("sort_priority", "100"));
    Print("\n");

    for (i = 0; music_config[i].token != NULL; i++)
      Print("# %s\n", getFormattedSetupEntry(music_config[i].token,
					     music_config[i].value));

    exit(0);
  }
  else if (strEqual(command, "print editorsetup.conf"))
  {
    Print("# You can configure your personal editor element list here.\n");
    Print("# (The entries below are default and therefore commented out.)\n");
    Print("\n");

    // this is needed to be able to check element list for cascade elements
    InitElementPropertiesStatic();
    InitElementPropertiesEngine(GAME_VERSION_ACTUAL);

    PrintEditorElementList();

    exit(0);
  }
  else if (strEqual(command, "print helpanim.conf"))
  {
    Print("# You can configure different element help animations here.\n");
    Print("# (The entries below are default and therefore commented out.)\n");
    Print("\n");

    for (i = 0; helpanim_config[i].token != NULL; i++)
    {
      Print("# %s\n", getFormattedSetupEntry(helpanim_config[i].token,
					     helpanim_config[i].value));

      if (strEqual(helpanim_config[i].token, "end"))
	Print("#\n");
    }

    exit(0);
  }
  else if (strEqual(command, "print helptext.conf"))
  {
    Print("# You can configure different element help text here.\n");
    Print("# (The entries below are default and therefore commented out.)\n");
    Print("\n");

    for (i = 0; helptext_config[i].token != NULL; i++)
      Print("# %s\n", getFormattedSetupEntry(helptext_config[i].token,
					     helptext_config[i].value));

    exit(0);
  }
  else if (strPrefix(command, "dump levelset "))
  {
    char *filename = &command[14];

    if (fileExists(filename) && isLevelsetFilename_BD(filename))
    {
      DumpLevelsetFromFilename_BD(filename);

      exit(0);
    }

    char *leveldir = getStringCopy(filename);	// read command parameters

    global.dumplevelset_leveldir = leveldir;

    program.headless = TRUE;
  }
  else if (strPrefix(command, "dump level "))
  {
    char *filename = &command[11];

    if (fileExists(filename))
    {
      LoadLevelFromFilename(&level, filename);
      DumpLevel(&level);

      exit(0);
    }

    char *leveldir = getStringCopy(filename);	// read command parameters
    char *level_nr = strchr(leveldir, ' ');

    if (level_nr == NULL)
      Fail("cannot open file '%s'", filename);

    *level_nr++ = '\0';

    global.dumplevel_leveldir = leveldir;
    global.dumplevel_level_nr = atoi(level_nr);

    program.headless = TRUE;
  }
  else if (strPrefix(command, "dump tape "))
  {
    char *filename = &command[10];

    if (fileExists(filename))
    {
      LoadTapeFromFilename(filename);
      DumpTape(&tape);

      exit(0);
    }

    char *leveldir = getStringCopy(filename);	// read command parameters
    char *level_nr = strchr(leveldir, ' ');

    if (level_nr == NULL)
      Fail("cannot open file '%s'", filename);

    *level_nr++ = '\0';

    global.dumptape_leveldir = leveldir;
    global.dumptape_level_nr = atoi(level_nr);

    program.headless = TRUE;
  }
  else if (strPrefix(command, "autoplay ") ||
	   strPrefix(command, "autoffwd ") ||
	   strPrefix(command, "autowarp ") ||
	   strPrefix(command, "autotest ") ||
	   strPrefix(command, "autosave ") ||
	   strPrefix(command, "autoupload ") ||
	   strPrefix(command, "autofix "))
  {
    char *arg_ptr = strchr(command, ' ');
    char *str_ptr = getStringCopy(arg_ptr);	// read command parameters

    global.autoplay_mode =
      (strPrefix(command, "autoplay") ? AUTOPLAY_MODE_PLAY :
       strPrefix(command, "autoffwd") ? AUTOPLAY_MODE_FFWD :
       strPrefix(command, "autowarp") ? AUTOPLAY_MODE_WARP :
       strPrefix(command, "autotest") ? AUTOPLAY_MODE_TEST :
       strPrefix(command, "autosave") ? AUTOPLAY_MODE_SAVE :
       strPrefix(command, "autoupload") ? AUTOPLAY_MODE_UPLOAD :
       strPrefix(command, "autofix")  ? AUTOPLAY_MODE_FIX :
       AUTOPLAY_MODE_NONE);

    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++;
    }

    if (global.autoplay_mode & AUTOPLAY_WARP_NO_DISPLAY)
      program.headless = TRUE;
  }
  else if (strPrefix(command, "patch tapes "))
  {
    char *str_ptr = getStringCopy(&command[12]); // read command parameters

    // skip leading whitespace
    while (*str_ptr == ' ' || *str_ptr == '\t')
      str_ptr++;

    if (*str_ptr == '\0')
      Fail("cannot find MODE in command '%s'", command);

    global.patchtapes_mode = str_ptr;		// store patch mode

    // advance to next whitespace (or end of string)
    while (*str_ptr != ' ' && *str_ptr != '\t' && *str_ptr != '\0')
      str_ptr++;

    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.patchtapes_leveldir == NULL)	// read level set string
      {
	global.patchtapes_leveldir = str_ptr;
	global.patchtapes_all = TRUE;		// default: patch all tapes

	for (i = 0; i < MAX_TAPES_PER_SET; i++)
	  global.patchtapes_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.patchtapes_level[level_nr] = TRUE;

	global.patchtapes_all = FALSE;
      }

      // advance string pointer to the next whitespace (or end of string)
      while (*str_ptr != ' ' && *str_ptr != '\t' && *str_ptr != '\0')
	str_ptr++;
    }

    if (global.patchtapes_leveldir == NULL)
    {
      if (strEqual(global.patchtapes_mode, "help"))
	global.patchtapes_leveldir = UNDEFINED_LEVELSET;
      else
	Fail("cannot find LEVELDIR in command '%s'", command);
    }

    program.headless = TRUE;
  }
  else if (strPrefix(command, "convert "))
  {
    char *str_copy = getStringCopy(strchr(command, ' ') + 1);
    char *str_ptr = strchr(str_copy, ' ');

    global.convert_leveldir = str_copy;
    global.convert_level_nr = -1;

    if (str_ptr != NULL)			// level number follows
    {
      *str_ptr++ = '\0';			// terminate leveldir string
      global.convert_level_nr = atoi(str_ptr);	// get level_nr value
    }

    program.headless = TRUE;
  }
  else if (strPrefix(command, "create sketch images "))
  {
    global.create_sketch_images_dir = getStringCopy(&command[21]);

    if (access(global.create_sketch_images_dir, W_OK) != 0)
      Fail("image target directory '%s' not found or not writable",
	   global.create_sketch_images_dir);
  }
  else if (strPrefix(command, "create collect image "))
  {
    global.create_collect_images_dir = getStringCopy(&command[21]);

    if (access(global.create_collect_images_dir, W_OK) != 0)
      Fail("image target directory '%s' not found or not writable",
	   global.create_collect_images_dir);
  }
  else if (strPrefix(command, "create CE image "))
  {
    CreateCustomElementImages(&command[16]);

    exit(0);
  }
  else
  {
    FailWithHelp("unrecognized command '%s'", command);
  }

  // disable networking if any valid command was recognized
  options.network = setup.network_mode = FALSE;
}

static void InitSetup(void)
{
  LoadUserNames();				// global user names
  LoadUserSetup();				// global user number

  LoadSetup();					// global setup info

  // set some options from setup file

  if (setup.options.verbose)
    options.verbose = TRUE;

  if (setup.options.debug)
    options.debug = TRUE;

  if (!strEqual(setup.options.debug_mode, ARG_UNDEFINED_STRING))
    options.debug_mode = getStringCopy(setup.options.debug_mode);

  if (setup.debug.show_frames_per_second)
    global.show_frames_per_second = TRUE;
}

static void InitGameInfo(void)
{
  game.restart_level = FALSE;
  game.request_active = FALSE;

  game.use_masked_elements_initial = FALSE;
}

static void InitPlayerInfo(void)
{
  int i;

  // choose default local player
  local_player = &stored_player[0];

  for (i = 0; i < MAX_PLAYERS; i++)
  {
    stored_player[i].connected_locally = FALSE;
    stored_player[i].connected_network = FALSE;
  }

  local_player->connected_locally = TRUE;
}

static void InitArtworkInfo(void)
{
  LoadArtworkInfo();
}

static char *get_string_in_brackets(char *string)
{
  char *string_in_brackets = checked_malloc(strlen(string) + 3);

  sprintf(string_in_brackets, "[%s]", string);

  return string_in_brackets;
}

static char *get_level_id_suffix(int id_nr)
{
  char *id_suffix = checked_malloc(1 + 3 + 1);

  if (id_nr < 0 || id_nr > 999)
    id_nr = 0;

  sprintf(id_suffix, ".%03d", id_nr);

  return id_suffix;
}

static void InitArtworkConfig(void)
{
  static char *image_id_prefix[MAX_NUM_ELEMENTS +
			       NUM_FONTS +
			       NUM_GLOBAL_ANIM_TOKENS + 1];
  static char *sound_id_prefix[2 * MAX_NUM_ELEMENTS +
			       NUM_GLOBAL_ANIM_TOKENS + 1];
  static char *music_id_prefix[NUM_MUSIC_PREFIXES +
			       NUM_GLOBAL_ANIM_TOKENS + 1];
  static char *action_id_suffix[NUM_ACTIONS + 1];
  static char *direction_id_suffix[NUM_DIRECTIONS_FULL + 1];
  static char *special_id_suffix[NUM_SPECIAL_GFX_ARGS + 1];
  static char *level_id_suffix[MAX_LEVELS + 1];
  static char *dummy[1] = { NULL };
  static char *ignore_generic_tokens[] =
  {
    "name",
    "sort_priority",

    "program_title",
    "program_copyright",
    "program_company",

    "text.main.name",
    "text.main.team",
    "text.main.levels",
    "text.main.scores",
    "text.main.editor",
    "text.main.info",
    "text.main.game",
    "text.main.setup",
    "text.main.quit",

    "text.title.names",
    "text.title.levels",
    "text.title.levelnr",
    "text.title.scores",
    "text.title.info",
    "text.title.setup",

    NULL
  };
  static char **ignore_image_tokens;
  static char **ignore_sound_tokens;
  static char **ignore_music_tokens;
  int num_ignore_generic_tokens;
  int num_ignore_image_tokens;
  int num_ignore_sound_tokens;
  int num_ignore_music_tokens;
  int i;

  // dynamically determine list of generic tokens to be ignored
  num_ignore_generic_tokens = 0;
  for (i = 0; ignore_generic_tokens[i] != NULL; i++)
    num_ignore_generic_tokens++;

  // dynamically determine list of image tokens to be ignored
  num_ignore_image_tokens = num_ignore_generic_tokens;
  for (i = 0; image_config_vars[i].token != NULL; i++)
    num_ignore_image_tokens++;

  ignore_image_tokens = checked_malloc((num_ignore_image_tokens + 1) * sizeof(char *));
  for (i = 0; i < num_ignore_generic_tokens; i++)
    ignore_image_tokens[i] = ignore_generic_tokens[i];
  for (i = 0; i < num_ignore_image_tokens - num_ignore_generic_tokens; i++)
    ignore_image_tokens[num_ignore_generic_tokens + i] = image_config_vars[i].token;
  ignore_image_tokens[num_ignore_image_tokens] = NULL;

  // dynamically determine list of sound tokens to be ignored
  num_ignore_sound_tokens = num_ignore_generic_tokens;
  for (i = 0; sound_config_vars[i].token != NULL; i++)
    num_ignore_sound_tokens++;

  ignore_sound_tokens = checked_malloc((num_ignore_sound_tokens + 1) * sizeof(char *));
  for (i = 0; i < num_ignore_generic_tokens; i++)
    ignore_sound_tokens[i] = ignore_generic_tokens[i];
  for (i = 0; i < num_ignore_sound_tokens - num_ignore_generic_tokens; i++)
    ignore_sound_tokens[num_ignore_generic_tokens + i] = sound_config_vars[i].token;
  ignore_sound_tokens[num_ignore_sound_tokens] = NULL;

  // dynamically determine list of music tokens to be ignored
  num_ignore_music_tokens = num_ignore_generic_tokens;
  ignore_music_tokens = checked_malloc((num_ignore_music_tokens + 1) * sizeof(char *));
  for (i = 0; i < num_ignore_generic_tokens; i++)
    ignore_music_tokens[i] = ignore_generic_tokens[i];
  ignore_music_tokens[num_ignore_music_tokens] = NULL;

  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
    image_id_prefix[i] = element_info[i].token_name;
  for (i = 0; i < NUM_FONTS; i++)
    image_id_prefix[MAX_NUM_ELEMENTS + i] = font_info[i].token_name;
  for (i = 0; i < NUM_GLOBAL_ANIM_TOKENS; i++)
    image_id_prefix[MAX_NUM_ELEMENTS + NUM_FONTS + i] = global_anim_info[i].token_name;
  image_id_prefix[MAX_NUM_ELEMENTS + NUM_FONTS + NUM_GLOBAL_ANIM_TOKENS] = NULL;

  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
    sound_id_prefix[i] = element_info[i].token_name;
  for (i = 0; i < MAX_NUM_ELEMENTS; i++)
    sound_id_prefix[MAX_NUM_ELEMENTS + i] = get_string_in_brackets(element_info[i].class_name);
  for (i = 0; i < NUM_GLOBAL_ANIM_TOKENS; i++)
    sound_id_prefix[2 * MAX_NUM_ELEMENTS + i] = global_anim_info[i].token_name;
  sound_id_prefix[2 * MAX_NUM_ELEMENTS + NUM_GLOBAL_ANIM_TOKENS] = NULL;

  for (i = 0; i < NUM_MUSIC_PREFIXES; i++)
    music_id_prefix[i] = music_prefix_info[i].prefix;
  for (i = 0; i < NUM_GLOBAL_ANIM_TOKENS; i++)
    music_id_prefix[NUM_MUSIC_PREFIXES + i] = global_anim_info[i].token_name;
  music_id_prefix[NUM_MUSIC_PREFIXES + NUM_GLOBAL_ANIM_TOKENS] = NULL;

  for (i = 0; i < NUM_ACTIONS; i++)
    action_id_suffix[i] = element_action_info[i].suffix;
  action_id_suffix[NUM_ACTIONS] = NULL;

  for (i = 0; i < NUM_DIRECTIONS_FULL; i++)
    direction_id_suffix[i] = element_direction_info[i].suffix;
  direction_id_suffix[NUM_DIRECTIONS_FULL] = NULL;

  for (i = 0; i < NUM_SPECIAL_GFX_ARGS; i++)
    special_id_suffix[i] = special_suffix_info[i].suffix;
  special_id_suffix[NUM_SPECIAL_GFX_ARGS] = NULL;

  for (i = 0; i < MAX_LEVELS; i++)
    level_id_suffix[i] = get_level_id_suffix(i);
  level_id_suffix[MAX_LEVELS] = NULL;

  InitImageList(image_config, NUM_IMAGE_FILES, image_config_suffix, image_id_prefix,
                action_id_suffix, direction_id_suffix, special_id_suffix, ignore_image_tokens);
  InitSoundList(sound_config, NUM_SOUND_FILES, sound_config_suffix, sound_id_prefix,
                action_id_suffix, dummy, special_id_suffix, ignore_sound_tokens);
  InitMusicList(music_config, NUM_MUSIC_FILES, music_config_suffix, music_id_prefix,
                action_id_suffix, special_id_suffix, level_id_suffix, ignore_music_tokens);
}

static void InitMixer(void)
{
  OpenAudio();

  StartMixer();
}

static void InitVideoOverlay(void)
{
  // if virtual buttons are not loaded from setup file, repeat initializing
  // virtual buttons grid with default values now that video is initialized
  if (!setup.touch.grid_initialized)
    InitSetup();

  InitTileCursorInfo();
  InitOverlayInfo();
}

void InitGfxBuffers(void)
{
  static int win_xsize_last = -1;
  static int win_ysize_last = -1;

  // create additional image buffers for double-buffering and cross-fading

  if (WIN_XSIZE != win_xsize_last || WIN_YSIZE != win_ysize_last)
  {
    // used to temporarily store the backbuffer -- only re-create if changed
    ReCreateBitmap(&bitmap_db_store_1, WIN_XSIZE, WIN_YSIZE);
    ReCreateBitmap(&bitmap_db_store_2, WIN_XSIZE, WIN_YSIZE);
    ReCreateBitmap(&bitmap_db_store_3, WIN_XSIZE, WIN_YSIZE);

    win_xsize_last = WIN_XSIZE;
    win_ysize_last = WIN_YSIZE;
  }

  ReCreateBitmap(&bitmap_db_field, FXSIZE, FYSIZE);
  ReCreateBitmap(&bitmap_db_door_1, 3 * DXSIZE, DYSIZE);
  ReCreateBitmap(&bitmap_db_door_2, 3 * VXSIZE, VYSIZE);

  // initialize screen properties
  InitGfxFieldInfo(SX, SY, SXSIZE, SYSIZE, REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE,
		   bitmap_db_field);
  InitGfxDoor1Info(DX, DY, DXSIZE, DYSIZE);
  InitGfxDoor2Info(VX, VY, VXSIZE, VYSIZE);
  InitGfxDoor3Info(EX, EY, EXSIZE, EYSIZE);
  InitGfxWindowInfo(WIN_XSIZE, WIN_YSIZE);
  InitGfxScrollbufferInfo(FXSIZE, FYSIZE);
  InitGfxClipRegion(FALSE, -1, -1, -1, -1);

  // required if door size definitions have changed
  InitGraphicCompatibilityInfo_Doors();

  InitGfxBuffers_BD();
  InitGfxBuffers_EM();
  InitGfxBuffers_SP();
  InitGfxBuffers_MM();
}

static void InitGfx(void)
{
  struct GraphicInfo *graphic_info_last = graphic_info;
  char *filename_font_initial = NULL;
  char *filename_image_initial[NUM_INITIAL_IMAGES] = { NULL };
  char *image_token[NUM_INITIAL_IMAGES] =
  {
    CONFIG_TOKEN_GLOBAL_BUSY_INITIAL,
    CONFIG_TOKEN_GLOBAL_BUSY,
    CONFIG_TOKEN_GLOBAL_BUSY_PLAYFIELD,
    CONFIG_TOKEN_BACKGROUND,
    CONFIG_TOKEN_BACKGROUND_LOADING_INITIAL,
    CONFIG_TOKEN_BACKGROUND_LOADING
  };
  struct MenuPosInfo *init_busy[NUM_INITIAL_IMAGES_BUSY] =
  {
    &init.busy_initial,
    &init.busy,
    &init.busy_playfield
  };
  Bitmap *bitmap_font_initial = NULL;
  int parameter[NUM_INITIAL_IMAGES][NUM_GFX_ARGS];
  int i, j, k;

  // determine settings for initial font (for displaying startup messages)
  for (i = 0; image_config[i].token != NULL; i++)
  {
    for (j = 0; j < NUM_INITIAL_FONTS; j++)
    {
      char font_token[128];
      int len_font_token;

      sprintf(font_token, "%s_%d", CONFIG_TOKEN_FONT_INITIAL, j + 1);
      len_font_token = strlen(font_token);

      if (strEqual(image_config[i].token, font_token))
      {
	filename_font_initial = image_config[i].value;
      }
      else if (strlen(image_config[i].token) > len_font_token &&
	       strncmp(image_config[i].token, font_token, len_font_token) == 0)
      {
	if (strEqual(&image_config[i].token[len_font_token], ".x"))
	  font_initial[j].src_x = atoi(image_config[i].value);
	else if (strEqual(&image_config[i].token[len_font_token], ".y"))
	  font_initial[j].src_y = atoi(image_config[i].value);
	else if (strEqual(&image_config[i].token[len_font_token], ".width"))
	  font_initial[j].width = atoi(image_config[i].value);
	else if (strEqual(&image_config[i].token[len_font_token], ".height"))
	  font_initial[j].height = atoi(image_config[i].value);
      }
    }
  }

  for (j = 0; j < NUM_INITIAL_FONTS; j++)
  {
    font_initial[j].num_chars = DEFAULT_NUM_CHARS_PER_FONT;
    font_initial[j].num_chars_per_line = DEFAULT_NUM_CHARS_PER_LINE;
  }

  if (filename_font_initial == NULL)	// should not happen
    Fail("cannot get filename for '%s'", CONFIG_TOKEN_FONT_INITIAL);

  InitGfxBuffers();
  InitGfxCustomArtworkInfo();
  InitGfxOtherSettings();

  InitGfxTileSizeInfo(TILESIZE, TILESIZE);

  bitmap_font_initial = LoadCustomImage(filename_font_initial);

  for (j = 0; j < NUM_INITIAL_FONTS; j++)
    font_initial[j].bitmap = bitmap_font_initial;

  InitFontGraphicInfo();

  InitMenuDesignSettings_Static();

  // initialize settings for initial images with default values
  for (i = 0; i < NUM_INITIAL_IMAGES; i++)
    for (j = 0; j < NUM_GFX_ARGS; j++)
      parameter[i][j] = get_graphic_parameter_value(image_config_suffix[j].value,
                                                    image_config_suffix[j].token,
                                                    image_config_suffix[j].type);

  // read settings for initial images from default custom artwork config
  char *gfx_config_filename = getPath3(options.graphics_directory,
				       GFX_DEFAULT_SUBDIR,
				       GRAPHICSINFO_FILENAME);

  if (fileExists(gfx_config_filename))
  {
    SetupFileHash *setup_file_hash = loadSetupFileHash(gfx_config_filename);

    if (setup_file_hash)
    {
      for (i = 0; i < NUM_INITIAL_IMAGES; i++)
      {
	char *filename = getHashEntry(setup_file_hash, image_token[i]);

	if (filename)
	{
	  filename_image_initial[i] = getStringCopy(filename);

	  for (j = 0; image_config_suffix[j].token != NULL; j++)
	  {
	    int type = image_config_suffix[j].type;
	    char *suffix = image_config_suffix[j].token;
	    char *token = getStringCat2(image_token[i], suffix);
	    char *value = getHashEntry(setup_file_hash, token);

	    checked_free(token);

	    if (value)
	      parameter[i][j] = get_graphic_parameter_value(value, suffix, type);
	  }
	}
      }

      // read values from custom graphics config file
      InitMenuDesignSettings_FromHash(setup_file_hash, FALSE);

      freeSetupFileHash(setup_file_hash);
    }
  }

  for (i = 0; i < NUM_INITIAL_IMAGES; i++)
  {
    if (filename_image_initial[i] == NULL)
    {
      int len_token = strlen(image_token[i]);

      // read settings for initial images from static default artwork config
      for (j = 0; image_config[j].token != NULL; j++)
      {
	if (strEqual(image_config[j].token, image_token[i]))
	{
	  filename_image_initial[i] = getStringCopy(image_config[j].value);
	}
	else if (strlen(image_config[j].token) > len_token &&
		 strncmp(image_config[j].token, image_token[i], len_token) == 0)
	{
	  for (k = 0; image_config_suffix[k].token != NULL; k++)
	  {
	    if (strEqual(&image_config[j].token[len_token], image_config_suffix[k].token))
	      parameter[i][k] = get_graphic_parameter_value(image_config[j].value,
                                                            image_config_suffix[k].token,
                                                            image_config_suffix[k].type);
	  }
	}
      }
    }
  }

  for (i = 0; i < NUM_INITIAL_IMAGES; i++)
  {
    if (filename_image_initial[i] == NULL)	// should not happen
      Fail("cannot get filename for '%s'", image_token[i]);

    image_initial[i].bitmaps = checked_calloc(sizeof(Bitmap *) * NUM_IMG_BITMAP_POINTERS);

    if (!strEqual(filename_image_initial[i], UNDEFINED_FILENAME))
      image_initial[i].bitmaps[IMG_BITMAP_STANDARD] = LoadCustomImage(filename_image_initial[i]);

    checked_free(filename_image_initial[i]);
  }

  for (i = 0; i < NUM_INITIAL_IMAGES; i++)
    image_initial[i].use_image_size = TRUE;

  graphic_info = image_initial;		// graphic == 0 => image_initial

  for (i = 0; i < NUM_INITIAL_IMAGES; i++)
    set_graphic_parameters_ext(i, parameter[i], image_initial[i].bitmaps);

  graphic_info = graphic_info_last;

  for (i = 0; i < NUM_INITIAL_IMAGES_BUSY; i++)
  {
    // set image size for busy animations
    init_busy[i]->width  = image_initial[i].width;
    init_busy[i]->height = image_initial[i].height;
  }

  SetLoadingBackgroundImage();

  ClearRectangleOnBackground(window, 0, 0, WIN_XSIZE, WIN_YSIZE);

  DrawProgramInfo();

  InitGfxDrawBusyAnimFunction(DrawInitAnim);
  InitGfxDrawGlobalAnimFunction(DrawGlobalAnimations);
  InitGfxDrawGlobalBorderFunction(DrawMaskedBorderToTarget);
  InitGfxDrawTileCursorFunction(DrawTileCursor);
  InitGfxDrawEnvelopeRequestFunction(DrawEnvelopeRequestToScreen);

  gfx.fade_border_source_status = global.border_status;
  gfx.fade_border_target_status = global.border_status;
  gfx.masked_border_bitmap_ptr = backbuffer;

  // use copy of busy animation to prevent change while reloading artwork
  init_last = init;
}

static void InitGfxBackground(void)
{
  fieldbuffer = bitmap_db_field;
  SetDrawtoField(DRAW_TO_BACKBUFFER);

  ClearRectangle(backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE);

  redraw_mask = REDRAW_ALL;
}

static void InitSnd(void)
{
  InitSoundSettings_Static();

  // read settings for initial sounds from default custom artwork config
  char *snd_config_filename = getPath3(options.sounds_directory,
				       SND_DEFAULT_SUBDIR,
				       SOUNDSINFO_FILENAME);

  if (fileExists(snd_config_filename))
  {
    SetupFileHash *setup_file_hash = loadSetupFileHash(snd_config_filename);

    if (setup_file_hash)
    {
      // read values from custom sounds config file
      InitSoundSettings_FromHash(setup_file_hash, FALSE);

      freeSetupFileHash(setup_file_hash);
    }
  }
}

static void InitLevelInfo(void)
{
  LoadLevelInfo();				// global level info
  LoadLevelSetup_LastSeries();			// last played series info
  LoadLevelSetup_SeriesInfo();			// last played level info

  if (global.autoplay_leveldir &&
      global.autoplay_mode != AUTOPLAY_MODE_TEST)
  {
    leveldir_current = getTreeInfoFromIdentifier(leveldir_first, global.autoplay_leveldir);
    if (leveldir_current == NULL)
      leveldir_current = getFirstValidTreeInfoEntry(leveldir_first);
  }

  SetLevelSetInfo(leveldir_current->identifier, level_nr);
}

static void InitLevelArtworkInfo(void)
{
  LoadLevelArtworkInfo();
}

static void InitImages(void)
{
  print_timestamp_init("InitImages");

#if 0
  Debug("init:InitImages", "leveldir_current->identifier == '%s'",
	leveldir_current == NULL ? "[NULL]" : leveldir_current->identifier);
  Debug("init:InitImages", "leveldir_current->graphics_path == '%s'",
	leveldir_current == NULL ? "[NULL]" : leveldir_current->graphics_path);
  Debug("init:InitImages", "leveldir_current->graphics_set == '%s'",
	leveldir_current == NULL ? "[NULL]" : leveldir_current->graphics_set);
  Debug("init:InitImages", "getLevelArtworkSet(ARTWORK_TYPE_GRAPHICS) == '%s'",
	leveldir_current == NULL ? "[NULL]" : LEVELDIR_ARTWORK_SET(leveldir_current, ARTWORK_TYPE_GRAPHICS));
#endif

  setLevelArtworkDir(artwork.gfx_first);

#if 0
  Debug("init:InitImages", "leveldir_current->identifier == '%s'",
	leveldir_current == NULL ? "[NULL]" : leveldir_current->identifier);
  Debug("init:InitImages", "leveldir_current->graphics_path == '%s'",
	leveldir_current == NULL ? "[NULL]" : leveldir_current->graphics_path);
  Debug("init:InitImages", "leveldir_current->graphics_set == '%s'",
	 leveldir_current == NULL ? "[NULL]" : leveldir_current->graphics_set);
  Debug("init:InitImages", "getLevelArtworkSet(ARTWORK_TYPE_GRAPHICS) == '%s'",
	leveldir_current == NULL ? "[NULL]" : LEVELDIR_ARTWORK_SET(leveldir_current, ARTWORK_TYPE_GRAPHICS));
#endif

#if 0
  Debug("init:InitImages", "InitImages for '%s' ['%s', '%s'] ['%s', '%s']",
	leveldir_current->identifier,
	artwork.gfx_current_identifier,
	artwork.gfx_current->identifier,
	leveldir_current->graphics_set,
	leveldir_current->graphics_path);
#endif

  UPDATE_BUSY_STATE();

  ReloadCustomImages();
  print_timestamp_time("ReloadCustomImages");

  UPDATE_BUSY_STATE();

  LoadCustomElementDescriptions();
  print_timestamp_time("LoadCustomElementDescriptions");

  UPDATE_BUSY_STATE();

  LoadMenuDesignSettings();
  print_timestamp_time("LoadMenuDesignSettings");

  UPDATE_BUSY_STATE();

  ReinitializeGraphics();
  print_timestamp_time("ReinitializeGraphics");

  LoadMenuDesignSettings_AfterGraphics();
  print_timestamp_time("LoadMenuDesignSettings_AfterGraphics");

  UPDATE_BUSY_STATE();

  print_timestamp_done("InitImages");
}

static void InitSound(void)
{
  print_timestamp_init("InitSound");

  // set artwork path to send it to the sound server process
  setLevelArtworkDir(artwork.snd_first);

  InitReloadCustomSounds();
  print_timestamp_time("InitReloadCustomSounds");

  LoadSoundSettings();
  print_timestamp_time("LoadSoundSettings");

  ReinitializeSounds();
  print_timestamp_time("ReinitializeSounds");

  print_timestamp_done("InitSound");
}

static void InitMusic(void)
{
  print_timestamp_init("InitMusic");

  // set artwork path to send it to the sound server process
  setLevelArtworkDir(artwork.mus_first);

  InitReloadCustomMusic();
  print_timestamp_time("InitReloadCustomMusic");

  ReinitializeMusic();
  print_timestamp_time("ReinitializeMusic");

  print_timestamp_done("InitMusic");
}

static void InitArtworkDone(void)
{
  if (program.headless)
    return;

  InitGlobalAnimations();
}

static void InitNetworkSettings(void)
{
  boolean network_enabled = (options.network || setup.network_mode);
  char *network_server = (options.server_host != NULL ? options.server_host :
			  setup.network_server_hostname);

  if (strEqual(network_server, STR_NETWORK_AUTO_DETECT))
    network_server = NULL;

  InitNetworkInfo(network_enabled,
		  FALSE,
		  options.serveronly,
		  network_server,
		  options.server_port);
}

void InitNetworkServer(void)
{
  if (!network.enabled || network.connected)
    return;

  LimitScreenUpdates(FALSE);

  if (game_status == GAME_MODE_LOADING)
    DrawProgramInfo();

  if (!ConnectToServer(network.server_host, network.server_port))
  {
    network.enabled = FALSE;

    setup.network_mode = FALSE;
  }
  else
  {
    SendToServer_ProtocolVersion();
    SendToServer_PlayerName(setup.player_name);
    SendToServer_NrWanted(setup.network_player_nr + 1);

    network.connected = TRUE;
  }

  // short time to recognize result of network initialization
  if (game_status == GAME_MODE_LOADING)
    Delay_WithScreenUpdates(1000);
}

static boolean CheckArtworkConfigForCustomElements(char *filename)
{
  SetupFileHash *setup_file_hash;
  boolean redefined_ce_found = FALSE;

  // !!! CACHE THIS BY USING HASH 'filename' => 'true/false' !!!

  if ((setup_file_hash = loadSetupFileHash(filename)) != NULL)
  {
    BEGIN_HASH_ITERATION(setup_file_hash, itr)
    {
      char *token = HASH_ITERATION_TOKEN(itr);

      if (strPrefix(token, "custom_"))
      {
	redefined_ce_found = TRUE;

	break;
      }
    }
    END_HASH_ITERATION(setup_file_hash, itr)

    freeSetupFileHash(setup_file_hash);
  }

  return redefined_ce_found;
}

static boolean CheckArtworkTypeForRedefinedCustomElements(int type)
{
  char *filename_base, *filename_local;
  boolean redefined_ce_found = FALSE;

  setLevelArtworkDir(ARTWORK_FIRST_NODE(artwork, type));

#if 0
  Debug("init:CheckArtworkTypeForRedefinedCustomElements",
	"leveldir_current->identifier == '%s'",
	leveldir_current == NULL ? "[NULL]" : leveldir_current->identifier);
  Debug("init:CheckArtworkTypeForRedefinedCustomElements",
	"leveldir_current->graphics_path == '%s'",
	leveldir_current == NULL ? "[NULL]" : leveldir_current->graphics_path);
  Debug("init:CheckArtworkTypeForRedefinedCustomElements",
	"leveldir_current->graphics_set == '%s'",
	leveldir_current == NULL ? "[NULL]" : leveldir_current->graphics_set);
  Debug("init:CheckArtworkTypeForRedefinedCustomElements",
	"getLevelArtworkSet(ARTWORK_TYPE_GRAPHICS) == '%s'",
	leveldir_current == NULL ? "[NULL]" :
	LEVELDIR_ARTWORK_SET(leveldir_current, type));
#endif

  // first look for special artwork configured in level series config
  filename_base = getCustomArtworkLevelConfigFilename(type);

#if 0
  Debug("init:CheckArtworkTypeForRedefinedCustomElements",
	"filename_base == '%s'", filename_base);
#endif

  if (fileExists(filename_base))
    redefined_ce_found |= CheckArtworkConfigForCustomElements(filename_base);

  filename_local = getCustomArtworkConfigFilename(type);

#if 0
  Debug("init:CheckArtworkTypeForRedefinedCustomElements",
	"filename_local == '%s'", filename_local);
#endif

  if (filename_local != NULL && !strEqual(filename_base, filename_local))
    redefined_ce_found |= CheckArtworkConfigForCustomElements(filename_local);

#if 0
  Debug("init:CheckArtworkTypeForRedefinedCustomElements",
	"redefined_ce_found == %d", redefined_ce_found);
#endif

  return redefined_ce_found;
}

static void InitOverrideArtwork(void)
{
  boolean redefined_ce_found = FALSE;

  // to check if this level set redefines any CEs, do not use overriding
  gfx.override_level_graphics = FALSE;
  gfx.override_level_sounds   = FALSE;
  gfx.override_level_music    = FALSE;

  // now check if this level set has definitions for custom elements
  if (setup.override_level_graphics == STATE_AUTO ||
      setup.override_level_sounds   == STATE_AUTO ||
      setup.override_level_music    == STATE_AUTO)
  {
    redefined_ce_found = (CheckArtworkTypeForRedefinedCustomElements(ARTWORK_TYPE_GRAPHICS) |
                          CheckArtworkTypeForRedefinedCustomElements(ARTWORK_TYPE_SOUNDS) |
                          CheckArtworkTypeForRedefinedCustomElements(ARTWORK_TYPE_MUSIC));
  }

#if 0
  Debug("init:InitOverrideArtwork", "redefined_ce_found == %d",
	redefined_ce_found);
#endif

  if (redefined_ce_found)
  {
    // this level set has CE definitions: change "MODE_AUTO" to "FALSE"
    gfx.override_level_graphics = (setup.override_level_graphics == TRUE);
    gfx.override_level_sounds   = (setup.override_level_sounds   == TRUE);
    gfx.override_level_music    = (setup.override_level_music    == TRUE);
  }
  else
  {
    // this level set has no CE definitions: change "MODE_AUTO" to "TRUE"
    gfx.override_level_graphics = (setup.override_level_graphics != FALSE);
    gfx.override_level_sounds   = (setup.override_level_sounds   != FALSE);
    gfx.override_level_music    = (setup.override_level_music    != FALSE);
  }

#if 0
  Debug("init:InitOverrideArtwork", "%d, %d, %d",
	gfx.override_level_graphics,
	gfx.override_level_sounds,
	gfx.override_level_music);
#endif
}

static char *setNewArtworkIdentifier(int type)
{
  static char *last_leveldir_identifier[3] = { NULL, NULL, NULL };
  static char *last_artwork_identifier[3] = { NULL, NULL, NULL };
  static boolean last_override_level_artwork[3] = { FALSE, FALSE, FALSE };
  static boolean last_has_custom_artwork_set[3] = { FALSE, FALSE, FALSE };
  static boolean initialized[3] = { FALSE, FALSE, FALSE };
  TreeInfo *artwork_first_node = ARTWORK_FIRST_NODE(artwork, type);
  boolean setup_override_artwork = GFX_OVERRIDE_ARTWORK(type);
  char *setup_artwork_set = SETUP_ARTWORK_SET(setup, type);
  char *leveldir_identifier = leveldir_current->identifier;
  // !!! setLevelArtworkDir() should be moved to an earlier stage !!!
  char *leveldir_artwork_set = setLevelArtworkDir(artwork_first_node);
  boolean has_level_artwork_set = (leveldir_artwork_set != NULL);
  TreeInfo *custom_artwork_set = getTreeInfoFromIdentifier(artwork_first_node, leveldir_identifier);
  boolean has_custom_artwork_set = (custom_artwork_set != NULL);
  char *artwork_current_identifier;
  char *artwork_new_identifier = NULL;	// default: nothing has changed

  // leveldir_current may be invalid (level group, parent link)
  if (!validLevelSeries(leveldir_current))
    return NULL;

  /* 1st step: determine artwork set to be activated in descending order:
     --------------------------------------------------------------------
     1. setup artwork (when configured to override everything else)
     2. artwork set configured in "levelinfo.conf" of current level set
        (artwork in level directory will have priority when loading later)
     3. artwork in level directory (stored in artwork sub-directory)
     4. setup artwork (currently configured in setup menu) */

  if (setup_override_artwork)
    artwork_current_identifier = setup_artwork_set;
  else if (has_level_artwork_set)
    artwork_current_identifier = leveldir_artwork_set;
  else if (has_custom_artwork_set)
    artwork_current_identifier = leveldir_identifier;
  else
    artwork_current_identifier = setup_artwork_set;

  /* 2nd step: check if it is really needed to reload artwork set
     ------------------------------------------------------------ */

  // ---------- reload if level set and also artwork set has changed ----------
  if (last_leveldir_identifier[type] != leveldir_identifier &&
      (last_has_custom_artwork_set[type] || has_custom_artwork_set))
    artwork_new_identifier = artwork_current_identifier;

  last_leveldir_identifier[type] = leveldir_identifier;
  last_has_custom_artwork_set[type] = has_custom_artwork_set;

  // ---------- reload if "override artwork" setting has changed --------------
  if (last_override_level_artwork[type] != setup_override_artwork)
    artwork_new_identifier = artwork_current_identifier;

  last_override_level_artwork[type] = setup_override_artwork;

  // ---------- reload if current artwork identifier has changed --------------
  if (!strEqual(last_artwork_identifier[type], artwork_current_identifier))
    artwork_new_identifier = artwork_current_identifier;

  // (we cannot compare string pointers here, so copy string content itself)
  setString(&last_artwork_identifier[type], artwork_current_identifier);

  // ---------- set new artwork identifier ----------
  *(ARTWORK_CURRENT_IDENTIFIER_PTR(artwork, type)) = artwork_current_identifier;

  // ---------- do not reload directly after starting -------------------------
  if (!initialized[type])
    artwork_new_identifier = NULL;

  initialized[type] = TRUE;

  return artwork_new_identifier;
}

static void InitArtworkIdentifier(void)
{
  setNewArtworkIdentifier(ARTWORK_TYPE_GRAPHICS);
  setNewArtworkIdentifier(ARTWORK_TYPE_SOUNDS);
  setNewArtworkIdentifier(ARTWORK_TYPE_MUSIC);
}

void ReloadCustomArtwork(int force_reload)
{
  int last_game_status = game_status;	// save current game status
  char *gfx_new_identifier;
  char *snd_new_identifier;
  char *mus_new_identifier;
  boolean force_reload_gfx = (force_reload & (1 << ARTWORK_TYPE_GRAPHICS));
  boolean force_reload_snd = (force_reload & (1 << ARTWORK_TYPE_SOUNDS));
  boolean force_reload_mus = (force_reload & (1 << ARTWORK_TYPE_MUSIC));
  boolean reload_needed;

  InitOverrideArtwork();

  AdjustGraphicsForEMC();
  AdjustSoundsForEMC();

  gfx_new_identifier = setNewArtworkIdentifier(ARTWORK_TYPE_GRAPHICS);
  snd_new_identifier = setNewArtworkIdentifier(ARTWORK_TYPE_SOUNDS);
  mus_new_identifier = setNewArtworkIdentifier(ARTWORK_TYPE_MUSIC);

  reload_needed = (gfx_new_identifier != NULL || force_reload_gfx ||
		   snd_new_identifier != NULL || force_reload_snd ||
		   mus_new_identifier != NULL || force_reload_mus);

  if (!reload_needed)
    return;

  print_timestamp_init("ReloadCustomArtwork");

  SetGameStatus(GAME_MODE_LOADING);

  FadeOut(REDRAW_ALL);

  SetLoadingBackgroundImage();

  ClearRectangleOnBackground(drawto, 0, 0, WIN_XSIZE, WIN_YSIZE);
  print_timestamp_time("ClearRectangleOnBackground");

  FadeIn(REDRAW_ALL);

  UPDATE_BUSY_STATE();

  InitMissingFileHash();

  if (gfx_new_identifier != NULL || force_reload_gfx)
  {
#if 0
    Debug("init:ReloadCustomArtwork",
	  "RELOADING GRAPHICS '%s' -> '%s' ['%s', '%s']",
	  artwork.gfx_current_identifier,
	  gfx_new_identifier,
	  artwork.gfx_current->identifier,
	  leveldir_current->graphics_set);
#endif

    InitImages();
    print_timestamp_time("InitImages");
  }

  if (snd_new_identifier != NULL || force_reload_snd)
  {
    InitSound();
    print_timestamp_time("InitSound");
  }

  if (mus_new_identifier != NULL || force_reload_mus)
  {
    InitMusic();
    print_timestamp_time("InitMusic");
  }

  InitArtworkDone();

  SetGameStatus(last_game_status);	// restore current game status

  FadeOut(REDRAW_ALL);

  RedrawGlobalBorder();

  // force redraw of (open or closed) door graphics
  SetDoorState(DOOR_OPEN_ALL);
  CloseDoor(DOOR_CLOSE_ALL | DOOR_NO_DELAY);

  FadeSetEnterScreen();
  FadeSkipNextFadeOut();

  print_timestamp_done("ReloadCustomArtwork");

  LimitScreenUpdates(FALSE);
}

void KeyboardAutoRepeatOffUnlessAutoplay(void)
{
  if (global.autoplay_leveldir == NULL)
    KeyboardAutoRepeatOff();
}

void DisplayExitMessage(char *format, va_list ap)
{
  // also check for initialized video (headless flag may be temporarily unset)
  if (program.headless || !video.initialized)
    return;

  // check if draw buffer and fonts for exit message are already available
  if (drawto == NULL || font_initial[NUM_INITIAL_FONTS - 1].bitmap == NULL)
    return;

  int font_1 = FC_RED;
  int font_2 = FC_YELLOW;
  int font_3 = FC_BLUE;
  int font_width = getFontWidth(font_2);
  int font_height = getFontHeight(font_2);
  int sx = SX;
  int sy = SY;
  int sxsize = WIN_XSIZE - 2 * sx;
  int sysize = WIN_YSIZE - 2 * sy;
  int line_length = sxsize / font_width;
  int max_lines = sysize / font_height;
  int num_lines_printed;

  gfx.sx = sx;
  gfx.sy = sy;
  gfx.sxsize = sxsize;
  gfx.sysize = sysize;

  sy = 20;

  ClearRectangle(drawto, 0, 0, WIN_XSIZE, WIN_YSIZE);

  DrawTextSCentered(sy, font_1, "Fatal error:");
  sy += 3 * font_height;;

  num_lines_printed = DrawTextBufferVA(sx, sy, format, ap, font_2,
                                       line_length, -1, max_lines, -1, -1, -1,
                                       0, BLIT_ON_BACKGROUND, TRUE, TRUE, FALSE);
  sy += (num_lines_printed + 3) * font_height;

  DrawTextSCentered(sy, font_1, "For details, see the following error file:");
  sy += 3 * font_height;

  num_lines_printed = DrawTextBuffer(sx, sy, program.log_filename, font_2,
                                     line_length, -1, max_lines, -1, -1, -1,
                                     0, BLIT_ON_BACKGROUND, TRUE, TRUE, FALSE);

  DrawTextSCentered(SYSIZE - 20, font_3, "Press any key or button to exit");

  redraw_mask = REDRAW_ALL;

  // force drawing exit message even if screen updates are currently limited
  LimitScreenUpdates(FALSE);

  BackToFront();

  // deactivate toons and global animations on error message screen
  setup.global_animations = FALSE;

  WaitForEventToContinue();
}


// ============================================================================
// OpenAll()
// ============================================================================

void OpenAll(void)
{
  print_timestamp_init("OpenAll");

  SetGameStatus(GAME_MODE_LOADING);

  InitCounter();

  InitGlobal();			// initialize some global variables

  InitRND(NEW_RANDOMIZE);
  InitSimpleRandom(NEW_RANDOMIZE);
  InitBetterRandom(NEW_RANDOMIZE);

  InitMissingFileHash();

  print_timestamp_time("[init global stuff]");

  InitSetup();

  print_timestamp_time("[init setup/config stuff (1)]");

  if (options.execute_command)
    Execute_Command(options.execute_command);

  InitNetworkSettings();

  InitRuntimeInfo();

  if (network.serveronly)
  {
#if defined(PLATFORM_UNIX)
    NetworkServer(network.server_port, TRUE);
#else
    Warn("networking only supported in Unix version");
#endif

    exit(0);			// never reached, server loops forever
  }

  InitGameInfo();
  print_timestamp_time("[init setup/config stuff (2)]");
  InitPlayerInfo();
  print_timestamp_time("[init setup/config stuff (3)]");
  InitArtworkInfo();		// needed before loading gfx, sound & music
  print_timestamp_time("[init setup/config stuff (4)]");
  InitArtworkConfig();		// needed before forking sound child process
  print_timestamp_time("[init setup/config stuff (5)]");
  InitMixer();
  print_timestamp_time("[init setup/config stuff (6)]");

  InitJoysticks();

  print_timestamp_time("[init setup/config stuff]");

  InitVideoDefaults();
  InitVideoDisplay();
  InitVideoBuffer(WIN_XSIZE, WIN_YSIZE, DEFAULT_DEPTH, setup.fullscreen);
  InitVideoOverlay();

  InitEventFilter(FilterMouseMotionEvents);

  print_timestamp_time("[init video stuff]");

  InitElementPropertiesStatic();
  InitElementPropertiesEngine(GAME_VERSION_ACTUAL);
  InitElementPropertiesGfxElement();

  print_timestamp_time("[init element properties stuff]");

  InitGfx();
  InitSnd();

  print_timestamp_time("InitGfx");

  InitLevelInfo();
  print_timestamp_time("InitLevelInfo");

  InitLevelArtworkInfo();
  print_timestamp_time("InitLevelArtworkInfo");

  InitOverrideArtwork();	// needs to know current level directory
  print_timestamp_time("InitOverrideArtwork");

  InitArtworkIdentifier();	// needs to know current level directory
  print_timestamp_time("InitArtworkIdentifier");

  InitImages();			// needs to know current level directory
  print_timestamp_time("InitImages");

  InitSound();			// needs to know current level directory
  print_timestamp_time("InitSound");

  InitMusic();			// needs to know current level directory
  print_timestamp_time("InitMusic");

  InitArtworkDone();

  InitGfxBackground();

  bd_open_all();
  em_open_all();
  sp_open_all();
  mm_open_all();

  if (global.autoplay_leveldir)
  {
    AutoPlayTapes();
    return;
  }
  else if (global.patchtapes_leveldir)
  {
    PatchTapes();
    return;
  }
  else if (global.convert_leveldir)
  {
    ConvertLevels();
    return;
  }
  else if (global.dumplevelset_leveldir)
  {
    DumpLevelset();
    return;
  }
  else if (global.dumplevel_leveldir)
  {
    DumpLevels();
    return;
  }
  else if (global.dumptape_leveldir)
  {
    DumpTapes();
    return;
  }
  else if (global.create_sketch_images_dir)
  {
    CreateLevelSketchImages();
    return;
  }
  else if (global.create_collect_images_dir)
  {
    CreateCollectElementImages();
    return;
  }

  InitNetworkServer();

  SetGameStatus(GAME_MODE_MAIN);

  FadeSetEnterScreen();
  if (!(fading.fade_mode & FADE_TYPE_TRANSFORM))
    FadeSkipNextFadeOut();

  print_timestamp_time("[post-artwork]");

  print_timestamp_done("OpenAll");

  if (setup.ask_for_remaining_tapes)
    setup.ask_for_uploading_tapes = TRUE;

  DrawMainMenu();

  if (options.drop_file != NULL)
    PushDropEvent(options.drop_file);

#if 0
  Debug("internal:path", "SDL_GetBasePath() == '%s'",
	SDL_GetBasePath());
  Debug("internal:path", "SDL_GetPrefPath() == '%s'",
	SDL_GetPrefPath("artsoft", "rocksndiamonds"));
#if defined(PLATFORM_ANDROID)
  Debug("internal:path", "SDL_AndroidGetInternalStoragePath() == '%s'",
	SDL_AndroidGetInternalStoragePath());
  Debug("internal:path", "SDL_AndroidGetExternalStoragePath() == '%s'",
	SDL_AndroidGetExternalStoragePath());
  Debug("internal:path", "SDL_AndroidGetExternalStorageState() == '%s'",
	(SDL_AndroidGetExternalStorageState() &
	 SDL_ANDROID_EXTERNAL_STORAGE_WRITE ? "writable" :
	 SDL_AndroidGetExternalStorageState() &
	 SDL_ANDROID_EXTERNAL_STORAGE_READ ? "readable" : "not available"));
#endif
#endif
}

static boolean WaitForApiThreads(void)
{
  DelayCounter thread_delay = { 10000 };

  if (program.api_thread_count == 0)
    return TRUE;

  // deactivate global animations (not accessible in game state "loading")
  setup.global_animations = FALSE;

  // set game state to "loading" to be able to show busy animation
  SetGameStatus(GAME_MODE_LOADING);

  ResetDelayCounter(&thread_delay);

  // wait for threads to finish (and fail on timeout)
  while (program.api_thread_count > 0)
  {
    if (DelayReached(&thread_delay))
    {
      Error("failed waiting for threads - TIMEOUT");

      return FALSE;
    }

    UPDATE_BUSY_STATE();

    Delay(20);
  }

  return TRUE;
}

void CloseAllAndExit(int exit_value)
{
  WaitForApiThreads();

  StopSounds();
  FreeAllSounds();
  FreeAllMusic();
  CloseAudio();		// called after freeing sounds (needed for SDL)

  bd_close_all();
  em_close_all();
  sp_close_all();

  FreeAllImages();

  // !!! TODO !!!
  // set a flag to tell the network server thread to quit and wait for it
  // using SDL_WaitThread()
  //
  // Code used with SDL 1.2:
  // if (network.server_thread)	// terminate network server
  //   SDL_KillThread(network.server_thread);

  CloseVideoDisplay();
  ClosePlatformDependentStuff();

  if (exit_value != 0 && !options.execute_command)
  {
    // fall back to default level set (current set may have caused an error)
    SaveLevelSetup_LastSeries_Deactivate();

    // tell user where to find error log file which may contain more details
    // (error notification now directly displayed on screen inside R'n'D
    // NotifyUserAboutErrorFile();	// currently only works for Windows
  }

  exit(exit_value);
}
