src/tools.c

   1 // ============================================================================
   2 // Rocks'n'Diamonds - McDuffin Strikes Back!
   3 // ----------------------------------------------------------------------------
   4 // (c) 1995-2014 by Artsoft Entertainment
   5 //                  Holger Schemel
   6 //                  info@artsoft.org
   7 //                  https://www.artsoft.org/
   8 // ----------------------------------------------------------------------------
   9 // tools.c
  10 // ============================================================================
  11
  12 #include <math.h>
  13
  14 #include "libgame/libgame.h"
  15
  16 #include "tools.h"
  17 #include "init.h"
  18 #include "game.h"
  19 #include "events.h"
  20 #include "anim.h"
  21 #include "network.h"
  22 #include "tape.h"
  23 #include "screens.h"
  24
  25
  26 #define DEBUG_FRAME_TIME        FALSE
  27
  28 // tool button identifiers
  29 #define TOOL_CTRL_ID_YES        0
  30 #define TOOL_CTRL_ID_NO         1
  31 #define TOOL_CTRL_ID_CONFIRM    2
  32 #define TOOL_CTRL_ID_PLAYER_1   3
  33 #define TOOL_CTRL_ID_PLAYER_2   4
  34 #define TOOL_CTRL_ID_PLAYER_3   5
  35 #define TOOL_CTRL_ID_PLAYER_4   6
  36 #define TOOL_CTRL_ID_TOUCH_YES  7
  37 #define TOOL_CTRL_ID_TOUCH_NO   8
  38 #define TOOL_CTRL_ID_TOUCH_CONFIRM 9
  39
  40 #define NUM_TOOL_BUTTONS        10
  41
  42 // constants for number of doors and door parts
  43 #define NUM_DOORS               2
  44 #define NUM_PANELS              NUM_DOORS
  45 // #define NUM_PANELS           0
  46 #define MAX_PARTS_PER_DOOR      8
  47 #define MAX_DOOR_PARTS          (NUM_DOORS * MAX_PARTS_PER_DOOR + NUM_PANELS)
  48 #define DOOR_PART_IS_PANEL(i)   ((i) >= NUM_DOORS * MAX_PARTS_PER_DOOR)
  49
  50
  51 struct DoorPartOrderInfo
  52 {
  53   int nr;
  54   int sort_priority;
  55 };
  56
  57 static struct DoorPartOrderInfo door_part_order[MAX_DOOR_PARTS];
  58
  59 struct DoorPartControlInfo
  60 {
  61   int door_token;
  62   int graphic;
  63   struct DoorPartPosInfo *pos;
  64 };
  65
  66 static struct DoorPartControlInfo door_part_controls[] =
  67 {
  68   {
  69     DOOR_1,
  70     IMG_GFX_DOOR_1_PART_1,
  71     &door_1.part_1
  72   },
  73   {
  74     DOOR_1,
  75     IMG_GFX_DOOR_1_PART_2,
  76     &door_1.part_2
  77   },
  78   {
  79     DOOR_1,
  80     IMG_GFX_DOOR_1_PART_3,
  81     &door_1.part_3
  82   },
  83   {
  84     DOOR_1,
  85     IMG_GFX_DOOR_1_PART_4,
  86     &door_1.part_4
  87   },
  88   {
  89     DOOR_1,
  90     IMG_GFX_DOOR_1_PART_5,
  91     &door_1.part_5
  92   },
  93   {
  94     DOOR_1,
  95     IMG_GFX_DOOR_1_PART_6,
  96     &door_1.part_6
  97   },
  98   {
  99     DOOR_1,
 100     IMG_GFX_DOOR_1_PART_7,
 101     &door_1.part_7
 102   },
 103   {
 104     DOOR_1,
 105     IMG_GFX_DOOR_1_PART_8,
 106     &door_1.part_8
 107   },
 108
 109   {
 110     DOOR_2,
 111     IMG_GFX_DOOR_2_PART_1,
 112     &door_2.part_1
 113   },
 114   {
 115     DOOR_2,
 116     IMG_GFX_DOOR_2_PART_2,
 117     &door_2.part_2
 118   },
 119   {
 120     DOOR_2,
 121     IMG_GFX_DOOR_2_PART_3,
 122     &door_2.part_3
 123   },
 124   {
 125     DOOR_2,
 126     IMG_GFX_DOOR_2_PART_4,
 127     &door_2.part_4
 128   },
 129   {
 130     DOOR_2,
 131     IMG_GFX_DOOR_2_PART_5,
 132     &door_2.part_5
 133   },
 134   {
 135     DOOR_2,
 136     IMG_GFX_DOOR_2_PART_6,
 137     &door_2.part_6
 138   },
 139   {
 140     DOOR_2,
 141     IMG_GFX_DOOR_2_PART_7,
 142     &door_2.part_7
 143   },
 144   {
 145     DOOR_2,
 146     IMG_GFX_DOOR_2_PART_8,
 147     &door_2.part_8
 148   },
 149
 150   {
 151     DOOR_1,
 152     IMG_BACKGROUND_PANEL,
 153     &door_1.panel
 154   },
 155   {
 156     DOOR_2,
 157     IMG_BACKGROUND_TAPE,
 158     &door_2.panel
 159   },
 160
 161   {
 162     -1,
 163     -1,
 164     NULL
 165   }
 166 };
 167
 168
 169 // forward declaration for internal use
 170 static void UnmapToolButtons(void);
 171 static void HandleToolButtons(struct GadgetInfo *);
 172 static int el_act_dir2crm(int, int, int);
 173 static int el_act2crm(int, int);
 174
 175 static struct GadgetInfo *tool_gadget[NUM_TOOL_BUTTONS];
 176 static int request_gadget_id = -1;
 177
 178 static char *print_if_not_empty(int element)
 179 {
 180   static char *s = NULL;
 181   char *token_name = element_info[element].token_name;
 182
 183   if (s != NULL)
 184     free(s);
 185
 186   s = checked_malloc(strlen(token_name) + 10 + 1);
 187
 188   if (element != EL_EMPTY)
 189     sprintf(s, "%d\t['%s']", element, token_name);
 190   else
 191     sprintf(s, "%d", element);
 192
 193   return s;
 194 }
 195
 196 int getFieldbufferOffsetX_RND(int dir, int pos)
 197 {
 198   int full_lev_fieldx = lev_fieldx + (BorderElement != EL_EMPTY ? 2 : 0);
 199   int dx = (dir & MV_HORIZONTAL ? pos : 0);
 200   int dx_var = dx * TILESIZE_VAR / TILESIZE;
 201   int fx = FX;
 202
 203   if (EVEN(SCR_FIELDX))
 204   {
 205     int sbx_right = SBX_Right + (BorderElement != EL_EMPTY ? 1 : 0);
 206     int ffx = (scroll_x - SBX_Left) * TILEX_VAR + dx_var;
 207
 208     if (ffx < sbx_right * TILEX_VAR + TILEX_VAR / 2)
 209       fx += dx_var - MIN(ffx, TILEX_VAR / 2) + TILEX_VAR;
 210     else
 211       fx += (dx_var > 0 ? TILEX_VAR : 0);
 212   }
 213   else
 214   {
 215     fx += dx_var;
 216   }
 217
 218   if (full_lev_fieldx <= SCR_FIELDX)
 219   {
 220     if (EVEN(SCR_FIELDX))
 221       fx = 2 * TILEX_VAR - (ODD(lev_fieldx)  ? TILEX_VAR / 2 : 0);
 222     else
 223       fx = 2 * TILEX_VAR - (EVEN(lev_fieldx) ? TILEX_VAR / 2 : 0);
 224   }
 225
 226   return fx;
 227 }
 228
 229 int getFieldbufferOffsetY_RND(int dir, int pos)
 230 {
 231   int full_lev_fieldy = lev_fieldy + (BorderElement != EL_EMPTY ? 2 : 0);
 232   int dy = (dir & MV_VERTICAL ? pos : 0);
 233   int dy_var = dy * TILESIZE_VAR / TILESIZE;
 234   int fy = FY;
 235
 236   if (EVEN(SCR_FIELDY))
 237   {
 238     int sby_lower = SBY_Lower + (BorderElement != EL_EMPTY ? 1 : 0);
 239     int ffy = (scroll_y - SBY_Upper) * TILEY_VAR + dy_var;
 240
 241     if (ffy < sby_lower * TILEY_VAR + TILEY_VAR / 2)
 242       fy += dy_var - MIN(ffy, TILEY_VAR / 2) + TILEY_VAR;
 243     else
 244       fy += (dy_var > 0 ? TILEY_VAR : 0);
 245   }
 246   else
 247   {
 248     fy += dy_var;
 249   }
 250
 251   if (full_lev_fieldy <= SCR_FIELDY)
 252   {
 253     if (EVEN(SCR_FIELDY))
 254       fy = 2 * TILEY_VAR - (ODD(lev_fieldy)  ? TILEY_VAR / 2 : 0);
 255     else
 256       fy = 2 * TILEY_VAR - (EVEN(lev_fieldy) ? TILEY_VAR / 2 : 0);
 257   }
 258
 259   return fy;
 260 }
 261
 262 static int getLevelFromScreenX_RND(int sx)
 263 {
 264   int fx = getFieldbufferOffsetX_RND(ScreenMovDir, ScreenGfxPos);
 265   int dx = fx - FX;
 266   int px = sx - SX;
 267   int lx = LEVELX((px + dx) / TILESIZE_VAR);
 268
 269   return lx;
 270 }
 271
 272 static int getLevelFromScreenY_RND(int sy)
 273 {
 274   int fy = getFieldbufferOffsetY_RND(ScreenMovDir, ScreenGfxPos);
 275   int dy = fy - FY;
 276   int py = sy - SY;
 277   int ly = LEVELY((py + dy) / TILESIZE_VAR);
 278
 279   return ly;
 280 }
 281
 282 static int getLevelFromScreenX_EM(int sx)
 283 {
 284   int level_xsize = level.native_em_level->cav->width;
 285   int full_xsize = level_xsize * TILESIZE_VAR;
 286
 287   sx -= (full_xsize < SXSIZE ? (SXSIZE - full_xsize) / 2 : 0);
 288
 289   int fx = getFieldbufferOffsetX_EM();
 290   int dx = fx;
 291   int px = sx - SX;
 292   int lx = LEVELX((px + dx) / TILESIZE_VAR);
 293
 294   return lx;
 295 }
 296
 297 static int getLevelFromScreenY_EM(int sy)
 298 {
 299   int level_ysize = level.native_em_level->cav->height;
 300   int full_ysize = level_ysize * TILESIZE_VAR;
 301
 302   sy -= (full_ysize < SYSIZE ? (SYSIZE - full_ysize) / 2 : 0);
 303
 304   int fy = getFieldbufferOffsetY_EM();
 305   int dy = fy;
 306   int py = sy - SY;
 307   int ly = LEVELY((py + dy) / TILESIZE_VAR);
 308
 309   return ly;
 310 }
 311
 312 static int getLevelFromScreenX_SP(int sx)
 313 {
 314   int menBorder = setup.sp_show_border_elements;
 315   int level_xsize = level.native_sp_level->width;
 316   int full_xsize = (level_xsize - (menBorder ? 0 : 1)) * TILESIZE_VAR;
 317
 318   sx += (full_xsize < SXSIZE ? (SXSIZE - full_xsize) / 2 : 0);
 319
 320   int fx = getFieldbufferOffsetX_SP();
 321   int dx = fx - FX;
 322   int px = sx - SX;
 323   int lx = LEVELX((px + dx) / TILESIZE_VAR);
 324
 325   return lx;
 326 }
 327
 328 static int getLevelFromScreenY_SP(int sy)
 329 {
 330   int menBorder = setup.sp_show_border_elements;
 331   int level_ysize = level.native_sp_level->height;
 332   int full_ysize = (level_ysize - (menBorder ? 0 : 1)) * TILESIZE_VAR;
 333
 334   sy += (full_ysize < SYSIZE ? (SYSIZE - full_ysize) / 2 : 0);
 335
 336   int fy = getFieldbufferOffsetY_SP();
 337   int dy = fy - FY;
 338   int py = sy - SY;
 339   int ly = LEVELY((py + dy) / TILESIZE_VAR);
 340
 341   return ly;
 342 }
 343
 344 static int getLevelFromScreenX_MM(int sx)
 345 {
 346   int level_xsize = level.native_mm_level->fieldx;
 347   int full_xsize = level_xsize * TILESIZE_VAR;
 348
 349   sx -= (full_xsize < SXSIZE ? (SXSIZE - full_xsize) / 2 : 0);
 350
 351   int px = sx - SX;
 352   int lx = (px + TILESIZE_VAR) / TILESIZE_VAR - 1;
 353
 354   return lx;
 355 }
 356
 357 static int getLevelFromScreenY_MM(int sy)
 358 {
 359   int level_ysize = level.native_mm_level->fieldy;
 360   int full_ysize = level_ysize * TILESIZE_VAR;
 361
 362   sy -= (full_ysize < SYSIZE ? (SYSIZE - full_ysize) / 2 : 0);
 363
 364   int py = sy - SY;
 365   int ly = (py + TILESIZE_VAR) / TILESIZE_VAR - 1;
 366
 367   return ly;
 368 }
 369
 370 int getLevelFromScreenX(int x)
 371 {
 372   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 373     return getLevelFromScreenX_EM(x);
 374   if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 375     return getLevelFromScreenX_SP(x);
 376   if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 377     return getLevelFromScreenX_MM(x);
 378   else
 379     return getLevelFromScreenX_RND(x);
 380 }
 381
 382 int getLevelFromScreenY(int y)
 383 {
 384   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 385     return getLevelFromScreenY_EM(y);
 386   if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 387     return getLevelFromScreenY_SP(y);
 388   if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 389     return getLevelFromScreenY_MM(y);
 390   else
 391     return getLevelFromScreenY_RND(y);
 392 }
 393
 394 void DumpTile(int x, int y)
 395 {
 396   int sx = SCREENX(x);
 397   int sy = SCREENY(y);
 398   char *token_name;
 399
 400   Info("---");
 401   Info("Field Info: SCREEN(%d, %d), LEVEL(%d, %d)", sx, sy, x, y);
 402   Info("---");
 403
 404   if (!IN_LEV_FIELD(x, y))
 405   {
 406     Info("(not in level field)");
 407     Info("");
 408
 409     return;
 410   }
 411
 412   token_name = element_info[Tile[x][y]].token_name;
 413
 414   Info("Tile:        %d\t['%s']",       Tile[x][y], token_name);
 415   Info("Back:        %s",               print_if_not_empty(Back[x][y]));
 416   Info("Store:       %s",               print_if_not_empty(Store[x][y]));
 417   Info("Store2:      %s",               print_if_not_empty(Store2[x][y]));
 418   Info("StorePlayer: %s",               print_if_not_empty(StorePlayer[x][y]));
 419   Info("MovPos:      %d",               MovPos[x][y]);
 420   Info("MovDir:      %d",               MovDir[x][y]);
 421   Info("MovDelay:    %d",               MovDelay[x][y]);
 422   Info("ChangeDelay: %d",               ChangeDelay[x][y]);
 423   Info("CustomValue: %d",               CustomValue[x][y]);
 424   Info("GfxElement:  %d",               GfxElement[x][y]);
 425   Info("GfxAction:   %d",               GfxAction[x][y]);
 426   Info("GfxFrame:    %d [%d]",          GfxFrame[x][y], FrameCounter);
 427   Info("Player x/y:  %d, %d",           local_player->jx, local_player->jy);
 428   Info("");
 429 }
 430
 431 void DumpTileFromScreen(int sx, int sy)
 432 {
 433   int lx = getLevelFromScreenX(sx);
 434   int ly = getLevelFromScreenY(sy);
 435
 436   DumpTile(lx, ly);
 437 }
 438
 439 void SetDrawtoField(int mode)
 440 {
 441   if (mode == DRAW_TO_FIELDBUFFER)
 442   {
 443     FX = 2 * TILEX_VAR;
 444     FY = 2 * TILEY_VAR;
 445     BX1 = -2;
 446     BY1 = -2;
 447     BX2 = SCR_FIELDX + 1;
 448     BY2 = SCR_FIELDY + 1;
 449
 450     drawto_field = fieldbuffer;
 451   }
 452   else  // DRAW_TO_BACKBUFFER
 453   {
 454     FX = SX;
 455     FY = SY;
 456     BX1 = 0;
 457     BY1 = 0;
 458     BX2 = SCR_FIELDX - 1;
 459     BY2 = SCR_FIELDY - 1;
 460
 461     drawto_field = backbuffer;
 462   }
 463 }
 464
 465 static void RedrawPlayfield_RND(void)
 466 {
 467   if (game.envelope_active)
 468     return;
 469
 470   DrawLevel(REDRAW_ALL);
 471   DrawAllPlayers();
 472 }
 473
 474 void RedrawPlayfield(void)
 475 {
 476   if (game_status != GAME_MODE_PLAYING)
 477     return;
 478
 479   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 480     RedrawPlayfield_EM(TRUE);
 481   else if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 482     RedrawPlayfield_SP(TRUE);
 483   else if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 484     RedrawPlayfield_MM();
 485   else if (level.game_engine_type == GAME_ENGINE_TYPE_RND)
 486     RedrawPlayfield_RND();
 487
 488   BlitScreenToBitmap(backbuffer);
 489
 490   BlitBitmap(drawto, window, gfx.sx, gfx.sy, gfx.sxsize, gfx.sysize,
 491              gfx.sx, gfx.sy);
 492 }
 493
 494 static void DrawMaskedBorderExt_Rect(int x, int y, int width, int height,
 495                                      int draw_target)
 496 {
 497   Bitmap *src_bitmap = getGlobalBorderBitmapFromStatus(global.border_status);
 498   Bitmap *dst_bitmap = gfx.masked_border_bitmap_ptr;
 499
 500   if (x == -1 && y == -1)
 501     return;
 502
 503   if (draw_target == DRAW_TO_SCREEN)
 504     BlitToScreenMasked(src_bitmap, x, y, width, height, x, y);
 505   else
 506     BlitBitmapMasked(src_bitmap, dst_bitmap, x, y, width, height, x, y);
 507 }
 508
 509 static void DrawMaskedBorderExt_FIELD(int draw_target)
 510 {
 511   if (global.border_status >= GAME_MODE_MAIN &&
 512       global.border_status <= GAME_MODE_PLAYING &&
 513       border.draw_masked[global.border_status])
 514     DrawMaskedBorderExt_Rect(REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE,
 515                              draw_target);
 516 }
 517
 518 static void DrawMaskedBorderExt_DOOR_1(int draw_target)
 519 {
 520   // when drawing to backbuffer, never draw border over open doors
 521   if (draw_target == DRAW_TO_BACKBUFFER &&
 522       (GetDoorState() & DOOR_OPEN_1))
 523     return;
 524
 525   if (border.draw_masked[GFX_SPECIAL_ARG_DOOR] &&
 526       (global.border_status != GAME_MODE_EDITOR ||
 527        border.draw_masked[GFX_SPECIAL_ARG_EDITOR]))
 528     DrawMaskedBorderExt_Rect(DX, DY, DXSIZE, DYSIZE, draw_target);
 529 }
 530
 531 static void DrawMaskedBorderExt_DOOR_2(int draw_target)
 532 {
 533   // when drawing to backbuffer, never draw border over open doors
 534   if (draw_target == DRAW_TO_BACKBUFFER &&
 535       (GetDoorState() & DOOR_OPEN_2))
 536     return;
 537
 538   if (border.draw_masked[GFX_SPECIAL_ARG_DOOR] &&
 539       global.border_status != GAME_MODE_EDITOR)
 540     DrawMaskedBorderExt_Rect(VX, VY, VXSIZE, VYSIZE, draw_target);
 541 }
 542
 543 static void DrawMaskedBorderExt_DOOR_3(int draw_target)
 544 {
 545   // currently not available
 546 }
 547
 548 static void DrawMaskedBorderExt_ALL(int draw_target)
 549 {
 550   DrawMaskedBorderExt_FIELD(draw_target);
 551   DrawMaskedBorderExt_DOOR_1(draw_target);
 552   DrawMaskedBorderExt_DOOR_2(draw_target);
 553   DrawMaskedBorderExt_DOOR_3(draw_target);
 554 }
 555
 556 static void DrawMaskedBorderExt(int redraw_mask, int draw_target)
 557 {
 558   // never draw masked screen borders on borderless screens
 559   if (global.border_status == GAME_MODE_LOADING ||
 560       global.border_status == GAME_MODE_TITLE)
 561     return;
 562
 563   if (redraw_mask & REDRAW_ALL)
 564     DrawMaskedBorderExt_ALL(draw_target);
 565   else
 566   {
 567     if (redraw_mask & REDRAW_FIELD)
 568       DrawMaskedBorderExt_FIELD(draw_target);
 569     if (redraw_mask & REDRAW_DOOR_1)
 570       DrawMaskedBorderExt_DOOR_1(draw_target);
 571     if (redraw_mask & REDRAW_DOOR_2)
 572       DrawMaskedBorderExt_DOOR_2(draw_target);
 573     if (redraw_mask & REDRAW_DOOR_3)
 574       DrawMaskedBorderExt_DOOR_3(draw_target);
 575   }
 576 }
 577
 578 void DrawMaskedBorder_FIELD(void)
 579 {
 580   DrawMaskedBorderExt_FIELD(DRAW_TO_BACKBUFFER);
 581 }
 582
 583 void DrawMaskedBorder(int redraw_mask)
 584 {
 585   DrawMaskedBorderExt(redraw_mask, DRAW_TO_BACKBUFFER);
 586 }
 587
 588 void DrawMaskedBorderToTarget(int draw_target)
 589 {
 590   if (draw_target == DRAW_TO_BACKBUFFER ||
 591       draw_target == DRAW_TO_SCREEN)
 592   {
 593     DrawMaskedBorderExt(REDRAW_ALL, draw_target);
 594   }
 595   else
 596   {
 597     int last_border_status = global.border_status;
 598
 599     if (draw_target == DRAW_TO_FADE_SOURCE)
 600     {
 601       global.border_status = gfx.fade_border_source_status;
 602       gfx.masked_border_bitmap_ptr = gfx.fade_bitmap_source;
 603     }
 604     else if (draw_target == DRAW_TO_FADE_TARGET)
 605     {
 606       global.border_status = gfx.fade_border_target_status;
 607       gfx.masked_border_bitmap_ptr = gfx.fade_bitmap_target;
 608     }
 609
 610     DrawMaskedBorderExt(REDRAW_ALL, draw_target);
 611
 612     global.border_status = last_border_status;
 613     gfx.masked_border_bitmap_ptr = backbuffer;
 614   }
 615 }
 616
 617 void DrawTileCursor(int draw_target)
 618 {
 619   Bitmap *fade_bitmap;
 620   Bitmap *src_bitmap;
 621   int src_x, src_y;
 622   int dst_x, dst_y;
 623   int graphic = IMG_GLOBAL_TILE_CURSOR;
 624   int frame = 0;
 625   int tilesize = TILESIZE_VAR;
 626   int width = tilesize;
 627   int height = tilesize;
 628
 629   if (game_status != GAME_MODE_PLAYING)
 630     return;
 631
 632   if (!tile_cursor.enabled ||
 633       !tile_cursor.active)
 634     return;
 635
 636   if (tile_cursor.moving)
 637   {
 638     int step = TILESIZE_VAR / 4;
 639     int dx = tile_cursor.target_x - tile_cursor.x;
 640     int dy = tile_cursor.target_y - tile_cursor.y;
 641
 642     if (ABS(dx) < step)
 643       tile_cursor.x = tile_cursor.target_x;
 644     else
 645       tile_cursor.x += SIGN(dx) * step;
 646
 647     if (ABS(dy) < step)
 648       tile_cursor.y = tile_cursor.target_y;
 649     else
 650       tile_cursor.y += SIGN(dy) * step;
 651
 652     if (tile_cursor.x == tile_cursor.target_x &&
 653         tile_cursor.y == tile_cursor.target_y)
 654       tile_cursor.moving = FALSE;
 655   }
 656
 657   dst_x = tile_cursor.x;
 658   dst_y = tile_cursor.y;
 659
 660   frame = getGraphicAnimationFrame(graphic, -1);
 661
 662   getSizedGraphicSource(graphic, frame, tilesize, &src_bitmap, &src_x, &src_y);
 663
 664   fade_bitmap =
 665     (draw_target == DRAW_TO_FADE_SOURCE ? gfx.fade_bitmap_source :
 666      draw_target == DRAW_TO_FADE_TARGET ? gfx.fade_bitmap_target : NULL);
 667
 668   if (draw_target == DRAW_TO_SCREEN)
 669     BlitToScreenMasked(src_bitmap, src_x, src_y, width, height, dst_x, dst_y);
 670   else
 671     BlitBitmapMasked(src_bitmap, fade_bitmap, src_x, src_y, width, height,
 672                      dst_x, dst_y);
 673 }
 674
 675 void BlitScreenToBitmapExt_RND(Bitmap *target_bitmap, int fx, int fy)
 676 {
 677   BlitBitmap(drawto_field, target_bitmap, fx, fy, SXSIZE, SYSIZE, SX, SY);
 678 }
 679
 680 void BlitScreenToBitmap_RND(Bitmap *target_bitmap)
 681 {
 682   int fx = getFieldbufferOffsetX_RND(ScreenMovDir, ScreenGfxPos);
 683   int fy = getFieldbufferOffsetY_RND(ScreenMovDir, ScreenGfxPos);
 684
 685   BlitScreenToBitmapExt_RND(target_bitmap, fx, fy);
 686 }
 687
 688 void BlitScreenToBitmap(Bitmap *target_bitmap)
 689 {
 690   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 691     BlitScreenToBitmap_EM(target_bitmap);
 692   else if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 693     BlitScreenToBitmap_SP(target_bitmap);
 694   else if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 695     BlitScreenToBitmap_MM(target_bitmap);
 696   else if (level.game_engine_type == GAME_ENGINE_TYPE_RND)
 697     BlitScreenToBitmap_RND(target_bitmap);
 698
 699   redraw_mask |= REDRAW_FIELD;
 700 }
 701
 702 static void DrawFramesPerSecond(void)
 703 {
 704   char text[100];
 705   int font_nr = FONT_TEXT_2;
 706   int font_width = getFontWidth(font_nr);
 707   int draw_deactivation_mask = GetDrawDeactivationMask();
 708   boolean draw_masked = (draw_deactivation_mask == REDRAW_NONE);
 709
 710   // draw FPS with leading space (needed if field buffer deactivated)
 711   sprintf(text, " %04.1f fps", global.frames_per_second);
 712
 713   // override draw deactivation mask (required for invisible warp mode)
 714   SetDrawDeactivationMask(REDRAW_NONE);
 715
 716   // draw opaque FPS if field buffer deactivated, else draw masked FPS
 717   DrawTextExt(backbuffer, SX + SXSIZE - font_width * strlen(text), SY, text,
 718               font_nr, (draw_masked ? BLIT_MASKED : BLIT_OPAQUE));
 719
 720   // set draw deactivation mask to previous value
 721   SetDrawDeactivationMask(draw_deactivation_mask);
 722
 723   // force full-screen redraw in this frame
 724   redraw_mask = REDRAW_ALL;
 725 }
 726
 727 #if DEBUG_FRAME_TIME
 728 static void PrintFrameTimeDebugging(void)
 729 {
 730   static unsigned int last_counter = 0;
 731   unsigned int counter = Counter();
 732   int diff_1 = counter - last_counter;
 733   int diff_2 = diff_1 - GAME_FRAME_DELAY;
 734   int diff_2_max = 20;
 735   int diff_2_cut = MIN(ABS(diff_2), diff_2_max);
 736   char diff_bar[2 * diff_2_max + 5];
 737   int pos = 0;
 738   int i;
 739
 740   diff_bar[pos++] = (diff_2 < -diff_2_max ? '<' : ' ');
 741
 742   for (i = 0; i < diff_2_max; i++)
 743     diff_bar[pos++] = (diff_2 >= 0 ? ' ' :
 744                        i >= diff_2_max - diff_2_cut ? '-' : ' ');
 745
 746   diff_bar[pos++] = '|';
 747
 748   for (i = 0; i < diff_2_max; i++)
 749     diff_bar[pos++] = (diff_2 <= 0 ? ' ' : i < diff_2_cut ? '+' : ' ');
 750
 751   diff_bar[pos++] = (diff_2 > diff_2_max ? '>' : ' ');
 752
 753   diff_bar[pos++] = '\0';
 754
 755   Debug("time:frame", "%06d [%02d] [%c%02d] %s",
 756         counter,
 757         diff_1,
 758         (diff_2 < 0 ? '-' : diff_2 > 0 ? '+' : ' '), ABS(diff_2),
 759         diff_bar);
 760
 761   last_counter = counter;
 762 }
 763 #endif
 764
 765 static int unifiedRedrawMask(int mask)
 766 {
 767   if (mask & REDRAW_ALL)
 768     return REDRAW_ALL;
 769
 770   if (mask & REDRAW_FIELD && mask & REDRAW_DOORS)
 771     return REDRAW_ALL;
 772
 773   return mask;
 774 }
 775
 776 static boolean equalRedrawMasks(int mask_1, int mask_2)
 777 {
 778   return unifiedRedrawMask(mask_1) == unifiedRedrawMask(mask_2);
 779 }
 780
 781 void BackToFront(void)
 782 {
 783   static int last_redraw_mask = REDRAW_NONE;
 784
 785   // force screen redraw in every frame to continue drawing global animations
 786   // (but always use the last redraw mask to prevent unwanted side effects)
 787   if (redraw_mask == REDRAW_NONE)
 788     redraw_mask = last_redraw_mask;
 789
 790   last_redraw_mask = redraw_mask;
 791
 792 #if 1
 793   // masked border now drawn immediately when blitting backbuffer to window
 794 #else
 795   // draw masked border to all viewports, if defined
 796   DrawMaskedBorder(redraw_mask);
 797 #endif
 798
 799   // draw frames per second (only if debug mode is enabled)
 800   if (redraw_mask & REDRAW_FPS)
 801     DrawFramesPerSecond();
 802
 803   // remove playfield redraw before potentially merging with doors redraw
 804   if (DrawingDeactivated(REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE))
 805     redraw_mask &= ~REDRAW_FIELD;
 806
 807   // redraw complete window if both playfield and (some) doors need redraw
 808   if (redraw_mask & REDRAW_FIELD && redraw_mask & REDRAW_DOORS)
 809     redraw_mask = REDRAW_ALL;
 810
 811   /* although redrawing the whole window would be fine for normal gameplay,
 812      being able to only redraw the playfield is required for deactivating
 813      certain drawing areas (mainly playfield) to work, which is needed for
 814      warp-forward to be fast enough (by skipping redraw of most frames) */
 815
 816   if (redraw_mask & REDRAW_ALL)
 817   {
 818     BlitBitmap(backbuffer, window, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
 819   }
 820   else if (redraw_mask & REDRAW_FIELD)
 821   {
 822     BlitBitmap(backbuffer, window,
 823                REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE, REAL_SX, REAL_SY);
 824   }
 825   else if (redraw_mask & REDRAW_DOORS)
 826   {
 827     // merge door areas to prevent calling screen redraw more than once
 828     int x1 = WIN_XSIZE;
 829     int y1 = WIN_YSIZE;
 830     int x2 = 0;
 831     int y2 = 0;
 832
 833     if (redraw_mask & REDRAW_DOOR_1)
 834     {
 835       x1 = MIN(x1, DX);
 836       y1 = MIN(y1, DY);
 837       x2 = MAX(x2, DX + DXSIZE);
 838       y2 = MAX(y2, DY + DYSIZE);
 839     }
 840
 841     if (redraw_mask & REDRAW_DOOR_2)
 842     {
 843       x1 = MIN(x1, VX);
 844       y1 = MIN(y1, VY);
 845       x2 = MAX(x2, VX + VXSIZE);
 846       y2 = MAX(y2, VY + VYSIZE);
 847     }
 848
 849     if (redraw_mask & REDRAW_DOOR_3)
 850     {
 851       x1 = MIN(x1, EX);
 852       y1 = MIN(y1, EY);
 853       x2 = MAX(x2, EX + EXSIZE);
 854       y2 = MAX(y2, EY + EYSIZE);
 855     }
 856
 857     // make sure that at least one pixel is blitted, and inside the screen
 858     // (else nothing is blitted, causing the animations not to be updated)
 859     x1 = MIN(MAX(0, x1), WIN_XSIZE - 1);
 860     y1 = MIN(MAX(0, y1), WIN_YSIZE - 1);
 861     x2 = MIN(MAX(1, x2), WIN_XSIZE);
 862     y2 = MIN(MAX(1, y2), WIN_YSIZE);
 863
 864     BlitBitmap(backbuffer, window, x1, y1, x2 - x1, y2 - y1, x1, y1);
 865   }
 866
 867   redraw_mask = REDRAW_NONE;
 868
 869 #if DEBUG_FRAME_TIME
 870   PrintFrameTimeDebugging();
 871 #endif
 872 }
 873
 874 void BackToFront_WithFrameDelay(unsigned int frame_delay_value)
 875 {
 876   unsigned int frame_delay_value_old = GetVideoFrameDelay();
 877
 878   SetVideoFrameDelay(frame_delay_value);
 879
 880   BackToFront();
 881
 882   SetVideoFrameDelay(frame_delay_value_old);
 883 }
 884
 885 static int fade_type_skip = FADE_TYPE_NONE;
 886
 887 static void FadeExt(int fade_mask, int fade_mode, int fade_type)
 888 {
 889   void (*draw_border_function)(void) = NULL;
 890   int x, y, width, height;
 891   int fade_delay, post_delay;
 892
 893   if (fade_type == FADE_TYPE_FADE_OUT)
 894   {
 895     if (fade_type_skip != FADE_TYPE_NONE)
 896     {
 897       // skip all fade operations until specified fade operation
 898       if (fade_type & fade_type_skip)
 899         fade_type_skip = FADE_TYPE_NONE;
 900
 901       return;
 902     }
 903
 904     if (fading.fade_mode & FADE_TYPE_TRANSFORM)
 905       return;
 906   }
 907
 908   redraw_mask |= fade_mask;
 909
 910   if (fade_type == FADE_TYPE_SKIP)
 911   {
 912     fade_type_skip = fade_mode;
 913
 914     return;
 915   }
 916
 917   fade_delay = fading.fade_delay;
 918   post_delay = (fade_mode == FADE_MODE_FADE_OUT ? fading.post_delay : 0);
 919
 920   if (fade_type_skip != FADE_TYPE_NONE)
 921   {
 922     // skip all fade operations until specified fade operation
 923     if (fade_type & fade_type_skip)
 924       fade_type_skip = FADE_TYPE_NONE;
 925
 926     fade_delay = 0;
 927   }
 928
 929   if (global.autoplay_leveldir)
 930   {
 931     return;
 932   }
 933
 934   if (fade_mask == REDRAW_FIELD)
 935   {
 936     x = FADE_SX;
 937     y = FADE_SY;
 938     width  = FADE_SXSIZE;
 939     height = FADE_SYSIZE;
 940
 941     if (border.draw_masked_when_fading)
 942       draw_border_function = DrawMaskedBorder_FIELD;    // update when fading
 943     else
 944       DrawMaskedBorder_FIELD();                         // draw once
 945   }
 946   else          // REDRAW_ALL
 947   {
 948     x = 0;
 949     y = 0;
 950     width  = WIN_XSIZE;
 951     height = WIN_YSIZE;
 952   }
 953
 954   // when switching screens without fading, set fade delay to zero
 955   if (!setup.fade_screens || fading.fade_mode == FADE_MODE_NONE)
 956     fade_delay = 0;
 957
 958   // do not display black frame when fading out without fade delay
 959   if (fade_mode == FADE_MODE_FADE_OUT && fade_delay == 0)
 960     return;
 961
 962   FadeRectangle(x, y, width, height, fade_mode, fade_delay, post_delay,
 963                 draw_border_function);
 964
 965   redraw_mask &= ~fade_mask;
 966
 967   ClearAutoRepeatKeyEvents();
 968 }
 969
 970 static void SetScreenStates_BeforeFadingIn(void)
 971 {
 972   // temporarily set screen mode for animations to screen after fading in
 973   global.anim_status = global.anim_status_next;
 974
 975   // store backbuffer with all animations that will be started after fading in
 976   PrepareFadeBitmap(DRAW_TO_FADE_TARGET);
 977
 978   // set screen mode for animations back to fading
 979   global.anim_status = GAME_MODE_PSEUDO_FADING;
 980 }
 981
 982 static void SetScreenStates_AfterFadingIn(void)
 983 {
 984   // store new source screen (to use correct masked border for fading)
 985   gfx.fade_border_source_status = global.border_status;
 986
 987   global.anim_status = global.anim_status_next;
 988 }
 989
 990 static void SetScreenStates_BeforeFadingOut(void)
 991 {
 992   // store new target screen (to use correct masked border for fading)
 993   gfx.fade_border_target_status = game_status;
 994
 995   // set screen mode for animations to fading
 996   global.anim_status = GAME_MODE_PSEUDO_FADING;
 997
 998   // store backbuffer with all animations that will be stopped for fading out
 999   PrepareFadeBitmap(DRAW_TO_FADE_SOURCE);
1000 }
1001
1002 static void SetScreenStates_AfterFadingOut(void)
1003 {
1004   global.border_status = game_status;
1005 }
1006
1007 void FadeIn(int fade_mask)
1008 {
1009   SetScreenStates_BeforeFadingIn();
1010
1011 #if 1
1012   DrawMaskedBorder(REDRAW_ALL);
1013 #endif
1014
1015   if (fading.fade_mode & FADE_TYPE_TRANSFORM)
1016     FadeExt(fade_mask, fading.fade_mode, FADE_TYPE_FADE_IN);
1017   else
1018     FadeExt(fade_mask, FADE_MODE_FADE_IN, FADE_TYPE_FADE_IN);
1019
1020   FADE_SX = REAL_SX;
1021   FADE_SY = REAL_SY;
1022   FADE_SXSIZE = FULL_SXSIZE;
1023   FADE_SYSIZE = FULL_SYSIZE;
1024
1025   // activate virtual buttons depending on upcoming game status
1026   if (strEqual(setup.touch.control_type, TOUCH_CONTROL_VIRTUAL_BUTTONS) &&
1027       game_status == GAME_MODE_PLAYING && !tape.playing)
1028     SetOverlayActive(TRUE);
1029
1030   SetScreenStates_AfterFadingIn();
1031
1032   // force update of global animation status in case of rapid screen changes
1033   redraw_mask = REDRAW_ALL;
1034   BackToFront();
1035 }
1036
1037 void FadeOut(int fade_mask)
1038 {
1039   // update screen if areas covered by "fade_mask" and "redraw_mask" differ
1040   if (!equalRedrawMasks(fade_mask, redraw_mask) &&
1041       fade_type_skip != FADE_MODE_SKIP_FADE_OUT)
1042     BackToFront();
1043
1044   SetScreenStates_BeforeFadingOut();
1045
1046   SetTileCursorActive(FALSE);
1047   SetOverlayActive(FALSE);
1048
1049 #if 0
1050   DrawMaskedBorder(REDRAW_ALL);
1051 #endif
1052
1053   if (fading.fade_mode & FADE_TYPE_TRANSFORM)
1054     FadeExt(fade_mask, fading.fade_mode, FADE_TYPE_FADE_OUT);
1055   else
1056     FadeExt(fade_mask, FADE_MODE_FADE_OUT, FADE_TYPE_FADE_OUT);
1057
1058   SetScreenStates_AfterFadingOut();
1059 }
1060
1061 static void FadeSetLeaveNext(struct TitleFadingInfo fading_leave, boolean set)
1062 {
1063   static struct TitleFadingInfo fading_leave_stored;
1064
1065   if (set)
1066     fading_leave_stored = fading_leave;
1067   else
1068     fading = fading_leave_stored;
1069 }
1070
1071 void FadeSetEnterMenu(void)
1072 {
1073   fading = menu.enter_menu;
1074
1075   FadeSetLeaveNext(fading, TRUE);       // (keep same fade mode)
1076 }
1077
1078 void FadeSetLeaveMenu(void)
1079 {
1080   fading = menu.leave_menu;
1081
1082   FadeSetLeaveNext(fading, TRUE);       // (keep same fade mode)
1083 }
1084
1085 void FadeSetEnterScreen(void)
1086 {
1087   fading = menu.enter_screen[game_status];
1088
1089   FadeSetLeaveNext(menu.leave_screen[game_status], TRUE);       // store
1090 }
1091
1092 void FadeSetNextScreen(void)
1093 {
1094   fading = menu.next_screen[game_status];
1095
1096   // (do not overwrite fade mode set by FadeSetEnterScreen)
1097   // FadeSetLeaveNext(fading, TRUE);    // (keep same fade mode)
1098 }
1099
1100 void FadeSetLeaveScreen(void)
1101 {
1102   FadeSetLeaveNext(menu.leave_screen[game_status], FALSE);      // recall
1103 }
1104
1105 void FadeSetFromType(int type)
1106 {
1107   if (type & TYPE_ENTER_SCREEN)
1108     FadeSetEnterScreen();
1109   else if (type & TYPE_ENTER)
1110     FadeSetEnterMenu();
1111   else if (type & TYPE_LEAVE)
1112     FadeSetLeaveMenu();
1113 }
1114
1115 void FadeSetDisabled(void)
1116 {
1117   static struct TitleFadingInfo fading_none = { FADE_MODE_NONE, -1, -1, -1 };
1118
1119   fading = fading_none;
1120 }
1121
1122 void FadeSkipNextFadeIn(void)
1123 {
1124   FadeExt(0, FADE_MODE_SKIP_FADE_IN, FADE_TYPE_SKIP);
1125 }
1126
1127 void FadeSkipNextFadeOut(void)
1128 {
1129   FadeExt(0, FADE_MODE_SKIP_FADE_OUT, FADE_TYPE_SKIP);
1130 }
1131
1132 static Bitmap *getBitmapFromGraphicOrDefault(int graphic, int default_graphic)
1133 {
1134   if (graphic == IMG_UNDEFINED)
1135     return NULL;
1136
1137   boolean redefined = getImageListEntryFromImageID(graphic)->redefined;
1138
1139   return (graphic_info[graphic].bitmap != NULL || redefined ?
1140           graphic_info[graphic].bitmap :
1141           graphic_info[default_graphic].bitmap);
1142 }
1143
1144 static Bitmap *getBackgroundBitmap(int graphic)
1145 {
1146   return getBitmapFromGraphicOrDefault(graphic, IMG_BACKGROUND);
1147 }
1148
1149 static Bitmap *getGlobalBorderBitmap(int graphic)
1150 {
1151   return getBitmapFromGraphicOrDefault(graphic, IMG_GLOBAL_BORDER);
1152 }
1153
1154 Bitmap *getGlobalBorderBitmapFromStatus(int status)
1155 {
1156   int graphic =
1157     (status == GAME_MODE_MAIN ||
1158      status == GAME_MODE_PSEUDO_TYPENAME        ? IMG_GLOBAL_BORDER_MAIN :
1159      status == GAME_MODE_SCORES                 ? IMG_GLOBAL_BORDER_SCORES :
1160      status == GAME_MODE_EDITOR                 ? IMG_GLOBAL_BORDER_EDITOR :
1161      status == GAME_MODE_PLAYING                ? IMG_GLOBAL_BORDER_PLAYING :
1162      IMG_GLOBAL_BORDER);
1163
1164   return getGlobalBorderBitmap(graphic);
1165 }
1166
1167 void SetWindowBackgroundImageIfDefined(int graphic)
1168 {
1169   if (graphic_info[graphic].bitmap)
1170     SetWindowBackgroundBitmap(graphic_info[graphic].bitmap);
1171 }
1172
1173 void SetMainBackgroundImageIfDefined(int graphic)
1174 {
1175   if (graphic_info[graphic].bitmap)
1176     SetMainBackgroundBitmap(graphic_info[graphic].bitmap);
1177 }
1178
1179 void SetDoorBackgroundImageIfDefined(int graphic)
1180 {
1181   if (graphic_info[graphic].bitmap)
1182     SetDoorBackgroundBitmap(graphic_info[graphic].bitmap);
1183 }
1184
1185 void SetWindowBackgroundImage(int graphic)
1186 {
1187   SetWindowBackgroundBitmap(getBackgroundBitmap(graphic));
1188 }
1189
1190 void SetMainBackgroundImage(int graphic)
1191 {
1192   SetMainBackgroundBitmap(getBackgroundBitmap(graphic));
1193 }
1194
1195 void SetDoorBackgroundImage(int graphic)
1196 {
1197   SetDoorBackgroundBitmap(getBackgroundBitmap(graphic));
1198 }
1199
1200 void SetPanelBackground(void)
1201 {
1202   struct GraphicInfo *gfx = &graphic_info[IMG_BACKGROUND_PANEL];
1203
1204   BlitBitmapTiled(gfx->bitmap, bitmap_db_panel, gfx->src_x, gfx->src_y,
1205                   gfx->width, gfx->height, 0, 0, DXSIZE, DYSIZE);
1206
1207   SetDoorBackgroundBitmap(bitmap_db_panel);
1208 }
1209
1210 void DrawBackground(int x, int y, int width, int height)
1211 {
1212   // "drawto" might still point to playfield buffer here (hall of fame)
1213   ClearRectangleOnBackground(backbuffer, x, y, width, height);
1214
1215   if (IN_GFX_FIELD_FULL(x, y))
1216     redraw_mask |= REDRAW_FIELD;
1217   else if (IN_GFX_DOOR_1(x, y))
1218     redraw_mask |= REDRAW_DOOR_1;
1219   else if (IN_GFX_DOOR_2(x, y))
1220     redraw_mask |= REDRAW_DOOR_2;
1221   else if (IN_GFX_DOOR_3(x, y))
1222     redraw_mask |= REDRAW_DOOR_3;
1223 }
1224
1225 void DrawBackgroundForFont(int x, int y, int width, int height, int font_nr)
1226 {
1227   struct FontBitmapInfo *font = getFontBitmapInfo(font_nr);
1228
1229   if (font->bitmap == NULL)
1230     return;
1231
1232   DrawBackground(x, y, width, height);
1233 }
1234
1235 void DrawBackgroundForGraphic(int x, int y, int width, int height, int graphic)
1236 {
1237   struct GraphicInfo *g = &graphic_info[graphic];
1238
1239   if (g->bitmap == NULL)
1240     return;
1241
1242   DrawBackground(x, y, width, height);
1243 }
1244
1245 static int game_status_last = -1;
1246 static Bitmap *global_border_bitmap_last = NULL;
1247 static Bitmap *global_border_bitmap = NULL;
1248 static int real_sx_last = -1, real_sy_last = -1;
1249 static int full_sxsize_last = -1, full_sysize_last = -1;
1250 static int dx_last = -1, dy_last = -1;
1251 static int dxsize_last = -1, dysize_last = -1;
1252 static int vx_last = -1, vy_last = -1;
1253 static int vxsize_last = -1, vysize_last = -1;
1254 static int ex_last = -1, ey_last = -1;
1255 static int exsize_last = -1, eysize_last = -1;
1256
1257 boolean CheckIfGlobalBorderHasChanged(void)
1258 {
1259   // if game status has not changed, global border has not changed either
1260   if (game_status == game_status_last)
1261     return FALSE;
1262
1263   // determine and store new global border bitmap for current game status
1264   global_border_bitmap = getGlobalBorderBitmapFromStatus(game_status);
1265
1266   return (global_border_bitmap_last != global_border_bitmap);
1267 }
1268
1269 #define ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED             0
1270
1271 #if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
1272 static boolean CheckIfGlobalBorderRedrawIsNeeded(void)
1273 {
1274   // if game status has not changed, nothing has to be redrawn
1275   if (game_status == game_status_last)
1276     return FALSE;
1277
1278   // redraw if last screen was title screen
1279   if (game_status_last == GAME_MODE_TITLE)
1280     return TRUE;
1281
1282   // redraw if global screen border has changed
1283   if (CheckIfGlobalBorderHasChanged())
1284     return TRUE;
1285
1286   // redraw if position or size of playfield area has changed
1287   if (real_sx_last != REAL_SX || real_sy_last != REAL_SY ||
1288       full_sxsize_last != FULL_SXSIZE || full_sysize_last != FULL_SYSIZE)
1289     return TRUE;
1290
1291   // redraw if position or size of door area has changed
1292   if (dx_last != DX || dy_last != DY ||
1293       dxsize_last != DXSIZE || dysize_last != DYSIZE)
1294     return TRUE;
1295
1296   // redraw if position or size of tape area has changed
1297   if (vx_last != VX || vy_last != VY ||
1298       vxsize_last != VXSIZE || vysize_last != VYSIZE)
1299     return TRUE;
1300
1301   // redraw if position or size of editor area has changed
1302   if (ex_last != EX || ey_last != EY ||
1303       exsize_last != EXSIZE || eysize_last != EYSIZE)
1304     return TRUE;
1305
1306   return FALSE;
1307 }
1308 #endif
1309
1310 static void RedrawGlobalBorderFromBitmap(Bitmap *bitmap)
1311 {
1312   if (bitmap)
1313     BlitBitmap(bitmap, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
1314   else
1315     ClearRectangle(backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE);
1316 }
1317
1318 void RedrawGlobalBorder(void)
1319 {
1320   Bitmap *bitmap = getGlobalBorderBitmapFromStatus(game_status);
1321
1322   RedrawGlobalBorderFromBitmap(bitmap);
1323
1324   redraw_mask = REDRAW_ALL;
1325 }
1326
1327 static void RedrawGlobalBorderIfNeeded(void)
1328 {
1329 #if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
1330   if (game_status == game_status_last)
1331     return;
1332 #endif
1333
1334   // copy current draw buffer to later copy back areas that have not changed
1335   if (game_status_last != GAME_MODE_TITLE)
1336     BlitBitmap(backbuffer, bitmap_db_store_1, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
1337
1338 #if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
1339   if (CheckIfGlobalBorderRedrawIsNeeded())
1340 #else
1341   // determine and store new global border bitmap for current game status
1342   global_border_bitmap = getGlobalBorderBitmapFromStatus(game_status);
1343 #endif
1344   {
1345     // redraw global screen border (or clear, if defined to be empty)
1346     RedrawGlobalBorderFromBitmap(global_border_bitmap);
1347
1348     if (game_status == GAME_MODE_EDITOR)
1349       DrawSpecialEditorDoor();
1350
1351     // copy previous playfield and door areas, if they are defined on both
1352     // previous and current screen and if they still have the same size
1353
1354     if (real_sx_last != -1 && real_sy_last != -1 &&
1355         REAL_SX != -1 && REAL_SY != -1 &&
1356         full_sxsize_last == FULL_SXSIZE && full_sysize_last == FULL_SYSIZE)
1357       BlitBitmap(bitmap_db_store_1, backbuffer,
1358                  real_sx_last, real_sy_last, FULL_SXSIZE, FULL_SYSIZE,
1359                  REAL_SX, REAL_SY);
1360
1361     if (dx_last != -1 && dy_last != -1 &&
1362         DX != -1 && DY != -1 &&
1363         dxsize_last == DXSIZE && dysize_last == DYSIZE)
1364       BlitBitmap(bitmap_db_store_1, backbuffer,
1365                  dx_last, dy_last, DXSIZE, DYSIZE, DX, DY);
1366
1367     if (game_status != GAME_MODE_EDITOR)
1368     {
1369       if (vx_last != -1 && vy_last != -1 &&
1370           VX != -1 && VY != -1 &&
1371           vxsize_last == VXSIZE && vysize_last == VYSIZE)
1372         BlitBitmap(bitmap_db_store_1, backbuffer,
1373                    vx_last, vy_last, VXSIZE, VYSIZE, VX, VY);
1374     }
1375     else
1376     {
1377       if (ex_last != -1 && ey_last != -1 &&
1378           EX != -1 && EY != -1 &&
1379           exsize_last == EXSIZE && eysize_last == EYSIZE)
1380         BlitBitmap(bitmap_db_store_1, backbuffer,
1381                    ex_last, ey_last, EXSIZE, EYSIZE, EX, EY);
1382     }
1383
1384     redraw_mask = REDRAW_ALL;
1385   }
1386
1387   game_status_last = game_status;
1388
1389   global_border_bitmap_last = global_border_bitmap;
1390
1391   real_sx_last = REAL_SX;
1392   real_sy_last = REAL_SY;
1393   full_sxsize_last = FULL_SXSIZE;
1394   full_sysize_last = FULL_SYSIZE;
1395   dx_last = DX;
1396   dy_last = DY;
1397   dxsize_last = DXSIZE;
1398   dysize_last = DYSIZE;
1399   vx_last = VX;
1400   vy_last = VY;
1401   vxsize_last = VXSIZE;
1402   vysize_last = VYSIZE;
1403   ex_last = EX;
1404   ey_last = EY;
1405   exsize_last = EXSIZE;
1406   eysize_last = EYSIZE;
1407 }
1408
1409 void ClearField(void)
1410 {
1411   RedrawGlobalBorderIfNeeded();
1412
1413   // !!! "drawto" might still point to playfield buffer here (see above) !!!
1414   // (when entering hall of fame after playing)
1415   DrawBackground(REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE);
1416
1417   // !!! maybe this should be done before clearing the background !!!
1418   if (game_status == GAME_MODE_PLAYING)
1419   {
1420     ClearRectangle(fieldbuffer, 0, 0, FXSIZE, FYSIZE);
1421     SetDrawtoField(DRAW_TO_FIELDBUFFER);
1422   }
1423   else
1424   {
1425     SetDrawtoField(DRAW_TO_BACKBUFFER);
1426   }
1427 }
1428
1429 void MarkTileDirty(int x, int y)
1430 {
1431   redraw_mask |= REDRAW_FIELD;
1432 }
1433
1434 void SetBorderElement(void)
1435 {
1436   int x, y;
1437
1438   BorderElement = EL_EMPTY;
1439
1440   // only the R'n'D game engine may use an additional steelwall border
1441   if (level.game_engine_type != GAME_ENGINE_TYPE_RND)
1442     return;
1443
1444   for (y = 0; y < lev_fieldy && BorderElement == EL_EMPTY; y++)
1445   {
1446     for (x = 0; x < lev_fieldx; x++)
1447     {
1448       if (!IS_INDESTRUCTIBLE(Tile[x][y]))
1449         BorderElement = EL_STEELWALL;
1450
1451       if (y != 0 && y != lev_fieldy - 1 && x != lev_fieldx - 1)
1452         x = lev_fieldx - 2;
1453     }
1454   }
1455 }
1456
1457 void FloodFillLevelExt(int from_x, int from_y, int fill_element,
1458                        int max_array_fieldx, int max_array_fieldy,
1459                        short field[max_array_fieldx][max_array_fieldy],
1460                        int max_fieldx, int max_fieldy)
1461 {
1462   int i,x,y;
1463   int old_element;
1464   static int check[4][2] = { { -1, 0 }, { 0, -1 }, { 1, 0 }, { 0, 1 } };
1465   static int safety = 0;
1466
1467   // check if starting field still has the desired content
1468   if (field[from_x][from_y] == fill_element)
1469     return;
1470
1471   safety++;
1472
1473   if (safety > max_fieldx * max_fieldy)
1474     Fail("Something went wrong in 'FloodFill()'. Please debug.");
1475
1476   old_element = field[from_x][from_y];
1477   field[from_x][from_y] = fill_element;
1478
1479   for (i = 0; i < 4; i++)
1480   {
1481     x = from_x + check[i][0];
1482     y = from_y + check[i][1];
1483
1484     if (IN_FIELD(x, y, max_fieldx, max_fieldy) && field[x][y] == old_element)
1485       FloodFillLevelExt(x, y, fill_element, max_array_fieldx, max_array_fieldy,
1486                         field, max_fieldx, max_fieldy);
1487   }
1488
1489   safety--;
1490 }
1491
1492 void FloodFillLevel(int from_x, int from_y, int fill_element,
1493                     short field[MAX_LEV_FIELDX][MAX_LEV_FIELDY],
1494                     int max_fieldx, int max_fieldy)
1495 {
1496   FloodFillLevelExt(from_x, from_y, fill_element,
1497                     MAX_LEV_FIELDX, MAX_LEV_FIELDY, field,
1498                     max_fieldx, max_fieldy);
1499 }
1500
1501 void SetRandomAnimationValue(int x, int y)
1502 {
1503   gfx.anim_random_frame = GfxRandom[x][y];
1504 }
1505
1506 int getGraphicAnimationFrame(int graphic, int sync_frame)
1507 {
1508   // animation synchronized with global frame counter, not move position
1509   if (graphic_info[graphic].anim_global_sync || sync_frame < 0)
1510     sync_frame = FrameCounter;
1511
1512   return getAnimationFrame(graphic_info[graphic].anim_frames,
1513                            graphic_info[graphic].anim_delay,
1514                            graphic_info[graphic].anim_mode,
1515                            graphic_info[graphic].anim_start_frame,
1516                            sync_frame);
1517 }
1518
1519 void getGraphicSourceBitmap(int graphic, int tilesize, Bitmap **bitmap)
1520 {
1521   struct GraphicInfo *g = &graphic_info[graphic];
1522   int tilesize_capped = MIN(MAX(1, tilesize), TILESIZE);
1523
1524   if (tilesize == gfx.standard_tile_size)
1525     *bitmap = g->bitmaps[IMG_BITMAP_STANDARD];
1526   else if (tilesize == game.tile_size)
1527     *bitmap = g->bitmaps[IMG_BITMAP_GAME];
1528   else
1529     *bitmap = g->bitmaps[IMG_BITMAP_1x1 - log_2(tilesize_capped)];
1530 }
1531
1532 void getGraphicSourceXY(int graphic, int frame, int *x, int *y,
1533                         boolean get_backside)
1534 {
1535   struct GraphicInfo *g = &graphic_info[graphic];
1536   int src_x = g->src_x + (get_backside ? g->offset2_x : 0);
1537   int src_y = g->src_y + (get_backside ? g->offset2_y : 0);
1538
1539   if (g->offset_y == 0)         // frames are ordered horizontally
1540   {
1541     int max_width = g->anim_frames_per_line * g->width;
1542     int pos = (src_y / g->height) * max_width + src_x + frame * g->offset_x;
1543
1544     *x = pos % max_width;
1545     *y = src_y % g->height + pos / max_width * g->height;
1546   }
1547   else if (g->offset_x == 0)    // frames are ordered vertically
1548   {
1549     int max_height = g->anim_frames_per_line * g->height;
1550     int pos = (src_x / g->width) * max_height + src_y + frame * g->offset_y;
1551
1552     *x = src_x % g->width + pos / max_height * g->width;
1553     *y = pos % max_height;
1554   }
1555   else                          // frames are ordered diagonally
1556   {
1557     *x = src_x + frame * g->offset_x;
1558     *y = src_y + frame * g->offset_y;
1559   }
1560 }
1561
1562 void getSizedGraphicSourceExt(int graphic, int frame, int tilesize,
1563                               Bitmap **bitmap, int *x, int *y,
1564                               boolean get_backside)
1565 {
1566   struct GraphicInfo *g = &graphic_info[graphic];
1567
1568   // if no graphics defined at all, use fallback graphics
1569   if (g->bitmaps == NULL)
1570     *g = graphic_info[IMG_CHAR_EXCLAM];
1571
1572   // if no in-game graphics defined, always use standard graphic size
1573   if (g->bitmaps[IMG_BITMAP_GAME] == NULL)
1574     tilesize = TILESIZE;
1575
1576   getGraphicSourceBitmap(graphic, tilesize, bitmap);
1577   getGraphicSourceXY(graphic, frame, x, y, get_backside);
1578
1579   *x = *x * tilesize / g->tile_size;
1580   *y = *y * tilesize / g->tile_size;
1581 }
1582
1583 void getSizedGraphicSource(int graphic, int frame, int tilesize,
1584                            Bitmap **bitmap, int *x, int *y)
1585 {
1586   getSizedGraphicSourceExt(graphic, frame, tilesize, bitmap, x, y, FALSE);
1587 }
1588
1589 void getFixedGraphicSource(int graphic, int frame,
1590                            Bitmap **bitmap, int *x, int *y)
1591 {
1592   getSizedGraphicSourceExt(graphic, frame, TILESIZE, bitmap, x, y, FALSE);
1593 }
1594
1595 void getMiniGraphicSource(int graphic, Bitmap **bitmap, int *x, int *y)
1596 {
1597   getSizedGraphicSource(graphic, 0, MINI_TILESIZE, bitmap, x, y);
1598 }
1599
1600 static void getGraphicSourceExt(int graphic, int frame, Bitmap **bitmap,
1601                                 int *x, int *y, boolean get_backside)
1602 {
1603   getSizedGraphicSourceExt(graphic, frame, TILESIZE_VAR, bitmap, x, y,
1604                            get_backside);
1605 }
1606
1607 void getGraphicSource(int graphic, int frame, Bitmap **bitmap, int *x, int *y)
1608 {
1609   getGraphicSourceExt(graphic, frame, bitmap, x, y, FALSE);
1610 }
1611
1612 void DrawGraphic(int x, int y, int graphic, int frame)
1613 {
1614 #if DEBUG
1615   if (!IN_SCR_FIELD(x, y))
1616   {
1617     Debug("draw:DrawGraphic", "x = %d, y = %d, graphic = %d", x, y, graphic);
1618     Debug("draw:DrawGraphic", "This should never happen!");
1619
1620     return;
1621   }
1622 #endif
1623
1624   DrawGraphicExt(drawto_field, FX + x * TILEX_VAR, FY + y * TILEY_VAR, graphic,
1625                  frame);
1626
1627   MarkTileDirty(x, y);
1628 }
1629
1630 void DrawFixedGraphic(int x, int y, int graphic, int frame)
1631 {
1632 #if DEBUG
1633   if (!IN_SCR_FIELD(x, y))
1634   {
1635     Debug("draw:DrawFixedGraphic", "x = %d, y = %d, graphic = %d",
1636           x, y, graphic);
1637     Debug("draw:DrawFixedGraphic", "This should never happen!");
1638
1639     return;
1640   }
1641 #endif
1642
1643   DrawFixedGraphicExt(drawto_field, FX + x * TILEX, FY + y * TILEY, graphic,
1644                       frame);
1645   MarkTileDirty(x, y);
1646 }
1647
1648 void DrawGraphicExt(DrawBuffer *dst_bitmap, int x, int y, int graphic,
1649                     int frame)
1650 {
1651   Bitmap *src_bitmap;
1652   int src_x, src_y;
1653
1654   getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1655
1656   BlitBitmap(src_bitmap, dst_bitmap, src_x, src_y, TILEX_VAR, TILEY_VAR, x, y);
1657 }
1658
1659 void DrawFixedGraphicExt(DrawBuffer *dst_bitmap, int x, int y, int graphic,
1660                          int frame)
1661 {
1662   Bitmap *src_bitmap;
1663   int src_x, src_y;
1664
1665   getFixedGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1666   BlitBitmap(src_bitmap, dst_bitmap, src_x, src_y, TILEX, TILEY, x, y);
1667 }
1668
1669 void DrawGraphicThruMask(int x, int y, int graphic, int frame)
1670 {
1671 #if DEBUG
1672   if (!IN_SCR_FIELD(x, y))
1673   {
1674     Debug("draw:DrawGraphicThruMask", "x = %d,y = %d, graphic = %d",
1675           x, y, graphic);
1676     Debug("draw:DrawGraphicThruMask", "This should never happen!");
1677
1678     return;
1679   }
1680 #endif
1681
1682   DrawGraphicThruMaskExt(drawto_field, FX + x * TILEX_VAR, FY + y * TILEY_VAR,
1683                          graphic, frame);
1684
1685   MarkTileDirty(x, y);
1686 }
1687
1688 void DrawFixedGraphicThruMask(int x, int y, int graphic, int frame)
1689 {
1690 #if DEBUG
1691   if (!IN_SCR_FIELD(x, y))
1692   {
1693     Debug("draw:DrawFixedGraphicThruMask", "x = %d,y = %d, graphic = %d",
1694           x, y, graphic);
1695     Debug("draw:DrawFixedGraphicThruMask", "This should never happen!");
1696
1697     return;
1698   }
1699 #endif
1700
1701   DrawFixedGraphicThruMaskExt(drawto_field, FX + x * TILEX, FY + y * TILEY,
1702                               graphic, frame);
1703   MarkTileDirty(x, y);
1704 }
1705
1706 void DrawGraphicThruMaskExt(DrawBuffer *d, int dst_x, int dst_y, int graphic,
1707                             int frame)
1708 {
1709   Bitmap *src_bitmap;
1710   int src_x, src_y;
1711
1712   getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1713
1714   BlitBitmapMasked(src_bitmap, d, src_x, src_y, TILEX_VAR, TILEY_VAR,
1715                    dst_x, dst_y);
1716 }
1717
1718 void DrawFixedGraphicThruMaskExt(DrawBuffer *d, int dst_x, int dst_y,
1719                                  int graphic, int frame)
1720 {
1721   Bitmap *src_bitmap;
1722   int src_x, src_y;
1723
1724   getFixedGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1725
1726   BlitBitmapMasked(src_bitmap, d, src_x, src_y, TILEX, TILEY,
1727                    dst_x, dst_y);
1728 }
1729
1730 void DrawSizedGraphic(int x, int y, int graphic, int frame, int tilesize)
1731 {
1732   DrawSizedGraphicExt(drawto, SX + x * tilesize, SY + y * tilesize, graphic,
1733                       frame, tilesize);
1734   MarkTileDirty(x / tilesize, y / tilesize);
1735 }
1736
1737 void DrawSizedGraphicThruMask(int x, int y, int graphic, int frame,
1738                               int tilesize)
1739 {
1740   DrawSizedGraphicThruMaskExt(drawto, SX + x * tilesize, SY + y * tilesize,
1741                               graphic, frame, tilesize);
1742   MarkTileDirty(x / tilesize, y / tilesize);
1743 }
1744
1745 void DrawSizedGraphicExt(DrawBuffer *d, int x, int y, int graphic, int frame,
1746                          int tilesize)
1747 {
1748   Bitmap *src_bitmap;
1749   int src_x, src_y;
1750
1751   getSizedGraphicSource(graphic, frame, tilesize, &src_bitmap, &src_x, &src_y);
1752   BlitBitmap(src_bitmap, d, src_x, src_y, tilesize, tilesize, x, y);
1753 }
1754
1755 void DrawSizedGraphicThruMaskExt(DrawBuffer *d, int x, int y, int graphic,
1756                                  int frame, int tilesize)
1757 {
1758   Bitmap *src_bitmap;
1759   int src_x, src_y;
1760
1761   getSizedGraphicSource(graphic, frame, tilesize, &src_bitmap, &src_x, &src_y);
1762   BlitBitmapMasked(src_bitmap, d, src_x, src_y, tilesize, tilesize, x, y);
1763 }
1764
1765 void DrawMiniGraphic(int x, int y, int graphic)
1766 {
1767   DrawMiniGraphicExt(drawto, SX + x * MINI_TILEX,SY + y * MINI_TILEY, graphic);
1768   MarkTileDirty(x / 2, y / 2);
1769 }
1770
1771 void DrawMiniGraphicExt(DrawBuffer *d, int x, int y, int graphic)
1772 {
1773   Bitmap *src_bitmap;
1774   int src_x, src_y;
1775
1776   getMiniGraphicSource(graphic, &src_bitmap, &src_x, &src_y);
1777   BlitBitmap(src_bitmap, d, src_x, src_y, MINI_TILEX, MINI_TILEY, x, y);
1778 }
1779
1780 static void DrawGraphicShiftedNormal(int x, int y, int dx, int dy,
1781                                      int graphic, int frame,
1782                                      int cut_mode, int mask_mode)
1783 {
1784   Bitmap *src_bitmap;
1785   int src_x, src_y;
1786   int dst_x, dst_y;
1787   int width = TILEX, height = TILEY;
1788   int cx = 0, cy = 0;
1789
1790   if (dx || dy)                 // shifted graphic
1791   {
1792     if (x < BX1)                // object enters playfield from the left
1793     {
1794       x = BX1;
1795       width = dx;
1796       cx = TILEX - dx;
1797       dx = 0;
1798     }
1799     else if (x > BX2)           // object enters playfield from the right
1800     {
1801       x = BX2;
1802       width = -dx;
1803       dx = TILEX + dx;
1804     }
1805     else if (x == BX1 && dx < 0) // object leaves playfield to the left
1806     {
1807       width += dx;
1808       cx = -dx;
1809       dx = 0;
1810     }
1811     else if (x == BX2 && dx > 0) // object leaves playfield to the right
1812       width -= dx;
1813     else if (dx)                // general horizontal movement
1814       MarkTileDirty(x + SIGN(dx), y);
1815
1816     if (y < BY1)                // object enters playfield from the top
1817     {
1818       if (cut_mode == CUT_BELOW) // object completely above top border
1819         return;
1820
1821       y = BY1;
1822       height = dy;
1823       cy = TILEY - dy;
1824       dy = 0;
1825     }
1826     else if (y > BY2)           // object enters playfield from the bottom
1827     {
1828       y = BY2;
1829       height = -dy;
1830       dy = TILEY + dy;
1831     }
1832     else if (y == BY1 && dy < 0) // object leaves playfield to the top
1833     {
1834       height += dy;
1835       cy = -dy;
1836       dy = 0;
1837     }
1838     else if (dy > 0 && cut_mode == CUT_ABOVE)
1839     {
1840       if (y == BY2)             // object completely above bottom border
1841         return;
1842
1843       height = dy;
1844       cy = TILEY - dy;
1845       dy = TILEY;
1846       MarkTileDirty(x, y + 1);
1847     }                           // object leaves playfield to the bottom
1848     else if (dy > 0 && (y == BY2 || cut_mode == CUT_BELOW))
1849       height -= dy;
1850     else if (dy)                // general vertical movement
1851       MarkTileDirty(x, y + SIGN(dy));
1852   }
1853
1854 #if DEBUG
1855   if (!IN_SCR_FIELD(x, y))
1856   {
1857     Debug("draw:DrawGraphicShiftedNormal", "x = %d, y = %d, graphic = %d",
1858           x, y, graphic);
1859     Debug("draw:DrawGraphicShiftedNormal", "This should never happen!");
1860
1861     return;
1862   }
1863 #endif
1864
1865   width = width * TILESIZE_VAR / TILESIZE;
1866   height = height * TILESIZE_VAR / TILESIZE;
1867   cx = cx * TILESIZE_VAR / TILESIZE;
1868   cy = cy * TILESIZE_VAR / TILESIZE;
1869   dx = dx * TILESIZE_VAR / TILESIZE;
1870   dy = dy * TILESIZE_VAR / TILESIZE;
1871
1872   if (width > 0 && height > 0)
1873   {
1874     getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1875
1876     src_x += cx;
1877     src_y += cy;
1878
1879     dst_x = FX + x * TILEX_VAR + dx;
1880     dst_y = FY + y * TILEY_VAR + dy;
1881
1882     if (mask_mode == USE_MASKING)
1883       BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
1884                        dst_x, dst_y);
1885     else
1886       BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
1887                  dst_x, dst_y);
1888
1889     MarkTileDirty(x, y);
1890   }
1891 }
1892
1893 static void DrawGraphicShiftedDouble(int x, int y, int dx, int dy,
1894                                      int graphic, int frame,
1895                                      int cut_mode, int mask_mode)
1896 {
1897   Bitmap *src_bitmap;
1898   int src_x, src_y;
1899   int dst_x, dst_y;
1900   int width = TILEX_VAR, height = TILEY_VAR;
1901   int x1 = x;
1902   int y1 = y;
1903   int x2 = x + SIGN(dx);
1904   int y2 = y + SIGN(dy);
1905
1906   // movement with two-tile animations must be sync'ed with movement position,
1907   // not with current GfxFrame (which can be higher when using slow movement)
1908   int anim_pos = (dx ? ABS(dx) : ABS(dy));
1909   int anim_frames = graphic_info[graphic].anim_frames;
1910
1911   // (we also need anim_delay here for movement animations with less frames)
1912   int anim_delay = graphic_info[graphic].anim_delay;
1913   int sync_frame = anim_pos * anim_frames * anim_delay / TILESIZE;
1914
1915   boolean draw_start_tile = (cut_mode != CUT_ABOVE);    // only for falling!
1916   boolean draw_end_tile   = (cut_mode != CUT_BELOW);    // only for falling!
1917
1918   // re-calculate animation frame for two-tile movement animation
1919   frame = getGraphicAnimationFrame(graphic, sync_frame);
1920
1921   // check if movement start graphic inside screen area and should be drawn
1922   if (draw_start_tile && IN_SCR_FIELD(x1, y1))
1923   {
1924     getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y, TRUE);
1925
1926     dst_x = FX + x1 * TILEX_VAR;
1927     dst_y = FY + y1 * TILEY_VAR;
1928
1929     if (mask_mode == USE_MASKING)
1930       BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
1931                        dst_x, dst_y);
1932     else
1933       BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
1934                  dst_x, dst_y);
1935
1936     MarkTileDirty(x1, y1);
1937   }
1938
1939   // check if movement end graphic inside screen area and should be drawn
1940   if (draw_end_tile && IN_SCR_FIELD(x2, y2))
1941   {
1942     getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y, FALSE);
1943
1944     dst_x = FX + x2 * TILEX_VAR;
1945     dst_y = FY + y2 * TILEY_VAR;
1946
1947     if (mask_mode == USE_MASKING)
1948       BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
1949                        dst_x, dst_y);
1950     else
1951       BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
1952                  dst_x, dst_y);
1953
1954     MarkTileDirty(x2, y2);
1955   }
1956 }
1957
1958 static void DrawGraphicShifted(int x, int y, int dx, int dy,
1959                                int graphic, int frame,
1960                                int cut_mode, int mask_mode)
1961 {
1962   if (graphic < 0)
1963   {
1964     DrawGraphic(x, y, graphic, frame);
1965
1966     return;
1967   }
1968
1969   if (graphic_info[graphic].double_movement)    // EM style movement images
1970     DrawGraphicShiftedDouble(x, y, dx, dy, graphic, frame, cut_mode,mask_mode);
1971   else
1972     DrawGraphicShiftedNormal(x, y, dx, dy, graphic, frame, cut_mode,mask_mode);
1973 }
1974
1975 static void DrawGraphicShiftedThruMask(int x, int y, int dx, int dy,
1976                                        int graphic, int frame, int cut_mode)
1977 {
1978   DrawGraphicShifted(x, y, dx, dy, graphic, frame, cut_mode, USE_MASKING);
1979 }
1980
1981 void DrawScreenElementExt(int x, int y, int dx, int dy, int element,
1982                           int cut_mode, int mask_mode)
1983 {
1984   int lx = LEVELX(x), ly = LEVELY(y);
1985   int graphic;
1986   int frame;
1987
1988   if (IN_LEV_FIELD(lx, ly))
1989   {
1990     SetRandomAnimationValue(lx, ly);
1991
1992     graphic = el_act_dir2img(element, GfxAction[lx][ly], GfxDir[lx][ly]);
1993     frame = getGraphicAnimationFrame(graphic, GfxFrame[lx][ly]);
1994
1995     // do not use double (EM style) movement graphic when not moving
1996     if (graphic_info[graphic].double_movement && !dx && !dy)
1997     {
1998       graphic = el_act_dir2img(element, ACTION_DEFAULT, GfxDir[lx][ly]);
1999       frame = getGraphicAnimationFrame(graphic, GfxFrame[lx][ly]);
2000     }
2001   }
2002   else  // border element
2003   {
2004     graphic = el2img(element);
2005     frame = getGraphicAnimationFrame(graphic, -1);
2006   }
2007
2008   if (element == EL_EXPANDABLE_WALL)
2009   {
2010     boolean left_stopped = FALSE, right_stopped = FALSE;
2011
2012     if (!IN_LEV_FIELD(lx - 1, ly) || IS_WALL(Tile[lx - 1][ly]))
2013       left_stopped = TRUE;
2014     if (!IN_LEV_FIELD(lx + 1, ly) || IS_WALL(Tile[lx + 1][ly]))
2015       right_stopped = TRUE;
2016
2017     if (left_stopped && right_stopped)
2018       graphic = IMG_WALL;
2019     else if (left_stopped)
2020     {
2021       graphic = IMG_EXPANDABLE_WALL_GROWING_RIGHT;
2022       frame = graphic_info[graphic].anim_frames - 1;
2023     }
2024     else if (right_stopped)
2025     {
2026       graphic = IMG_EXPANDABLE_WALL_GROWING_LEFT;
2027       frame = graphic_info[graphic].anim_frames - 1;
2028     }
2029   }
2030
2031   if (dx || dy)
2032     DrawGraphicShifted(x, y, dx, dy, graphic, frame, cut_mode, mask_mode);
2033   else if (mask_mode == USE_MASKING)
2034     DrawGraphicThruMask(x, y, graphic, frame);
2035   else
2036     DrawGraphic(x, y, graphic, frame);
2037 }
2038
2039 void DrawLevelElementExt(int x, int y, int dx, int dy, int element,
2040                          int cut_mode, int mask_mode)
2041 {
2042   if (IN_LEV_FIELD(x, y) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
2043     DrawScreenElementExt(SCREENX(x), SCREENY(y), dx, dy, element,
2044                          cut_mode, mask_mode);
2045 }
2046
2047 void DrawScreenElementShifted(int x, int y, int dx, int dy, int element,
2048                               int cut_mode)
2049 {
2050   DrawScreenElementExt(x, y, dx, dy, element, cut_mode, NO_MASKING);
2051 }
2052
2053 void DrawLevelElementShifted(int x, int y, int dx, int dy, int element,
2054                              int cut_mode)
2055 {
2056   DrawLevelElementExt(x, y, dx, dy, element, cut_mode, NO_MASKING);
2057 }
2058
2059 void DrawLevelElementThruMask(int x, int y, int element)
2060 {
2061   DrawLevelElementExt(x, y, 0, 0, element, NO_CUTTING, USE_MASKING);
2062 }
2063
2064 void DrawLevelFieldThruMask(int x, int y)
2065 {
2066   DrawLevelElementExt(x, y, 0, 0, Tile[x][y], NO_CUTTING, USE_MASKING);
2067 }
2068
2069 // !!! implementation of quicksand is totally broken !!!
2070 #define IS_CRUMBLED_TILE(x, y, e)                                       \
2071         (GFX_CRUMBLED(e) && (!IN_LEV_FIELD(x, y) ||                     \
2072                              !IS_MOVING(x, y) ||                        \
2073                              (e) == EL_QUICKSAND_EMPTYING ||            \
2074                              (e) == EL_QUICKSAND_FAST_EMPTYING))
2075
2076 static void DrawLevelFieldCrumbledInnerCorners(int x, int y, int dx, int dy,
2077                                                int graphic)
2078 {
2079   Bitmap *src_bitmap;
2080   int src_x, src_y;
2081   int width, height, cx, cy;
2082   int sx = SCREENX(x), sy = SCREENY(y);
2083   int crumbled_border_size = graphic_info[graphic].border_size;
2084   int crumbled_tile_size = graphic_info[graphic].tile_size;
2085   int crumbled_border_size_var =
2086     crumbled_border_size * TILESIZE_VAR / crumbled_tile_size;
2087   int i;
2088
2089   getGraphicSource(graphic, 0, &src_bitmap, &src_x, &src_y);
2090
2091   for (i = 1; i < 4; i++)
2092   {
2093     int dxx = (i & 1 ? dx : 0);
2094     int dyy = (i & 2 ? dy : 0);
2095     int xx = x + dxx;
2096     int yy = y + dyy;
2097     int element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
2098                    BorderElement);
2099
2100     // check if neighbour field is of same crumble type
2101     boolean same = (IS_CRUMBLED_TILE(xx, yy, element) &&
2102                     graphic_info[graphic].class ==
2103                     graphic_info[el_act2crm(element, ACTION_DEFAULT)].class);
2104
2105     // return if check prevents inner corner
2106     if (same == (dxx == dx && dyy == dy))
2107       return;
2108   }
2109
2110   // if we reach this point, we have an inner corner
2111
2112   getGraphicSource(graphic, 1, &src_bitmap, &src_x, &src_y);
2113
2114   width  = crumbled_border_size_var;
2115   height = crumbled_border_size_var;
2116   cx = (dx > 0 ? TILESIZE_VAR - width  : 0);
2117   cy = (dy > 0 ? TILESIZE_VAR - height : 0);
2118
2119   BlitBitmap(src_bitmap, drawto_field, src_x + cx, src_y + cy,
2120              width, height, FX + sx * TILEX_VAR + cx, FY + sy * TILEY_VAR + cy);
2121 }
2122
2123 static void DrawLevelFieldCrumbledBorders(int x, int y, int graphic, int frame,
2124                                           int dir)
2125 {
2126   Bitmap *src_bitmap;
2127   int src_x, src_y;
2128   int width, height, bx, by, cx, cy;
2129   int sx = SCREENX(x), sy = SCREENY(y);
2130   int crumbled_border_size = graphic_info[graphic].border_size;
2131   int crumbled_tile_size = graphic_info[graphic].tile_size;
2132   int crumbled_border_size_var =
2133     crumbled_border_size * TILESIZE_VAR / crumbled_tile_size;
2134   int crumbled_border_pos_var = TILESIZE_VAR - crumbled_border_size_var;
2135   int i;
2136
2137   getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
2138
2139   // draw simple, sloppy, non-corner-accurate crumbled border
2140
2141   width  = (dir == 1 || dir == 2 ? crumbled_border_size_var : TILESIZE_VAR);
2142   height = (dir == 0 || dir == 3 ? crumbled_border_size_var : TILESIZE_VAR);
2143   cx = (dir == 2 ? crumbled_border_pos_var : 0);
2144   cy = (dir == 3 ? crumbled_border_pos_var : 0);
2145
2146   BlitBitmap(src_bitmap, drawto_field, src_x + cx, src_y + cy, width, height,
2147              FX + sx * TILEX_VAR + cx,
2148              FY + sy * TILEY_VAR + cy);
2149
2150   // (remaining middle border part must be at least as big as corner part)
2151   if (!(graphic_info[graphic].style & STYLE_ACCURATE_BORDERS) ||
2152       crumbled_border_size_var >= TILESIZE_VAR / 3)
2153     return;
2154
2155   // correct corners of crumbled border, if needed
2156
2157   for (i = -1; i <= 1; i += 2)
2158   {
2159     int xx = x + (dir == 0 || dir == 3 ? i : 0);
2160     int yy = y + (dir == 1 || dir == 2 ? i : 0);
2161     int element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
2162                    BorderElement);
2163
2164     // check if neighbour field is of same crumble type
2165     if (IS_CRUMBLED_TILE(xx, yy, element) &&
2166         graphic_info[graphic].class ==
2167         graphic_info[el_act2crm(element, ACTION_DEFAULT)].class)
2168     {
2169       // no crumbled corner, but continued crumbled border
2170
2171       int c1 = (dir == 2 || dir == 3 ? crumbled_border_pos_var : 0);
2172       int c2 = (i == 1 ? crumbled_border_pos_var : 0);
2173       int b1 = (i == 1 ? crumbled_border_size_var :
2174                 TILESIZE_VAR - 2 * crumbled_border_size_var);
2175
2176       width  = crumbled_border_size_var;
2177       height = crumbled_border_size_var;
2178
2179       if (dir == 1 || dir == 2)
2180       {
2181         cx = c1;
2182         cy = c2;
2183         bx = cx;
2184         by = b1;
2185       }
2186       else
2187       {
2188         cx = c2;
2189         cy = c1;
2190         bx = b1;
2191         by = cy;
2192       }
2193
2194       BlitBitmap(src_bitmap, drawto_field, src_x + bx, src_y + by,
2195                  width, height,
2196                  FX + sx * TILEX_VAR + cx,
2197                  FY + sy * TILEY_VAR + cy);
2198     }
2199   }
2200 }
2201
2202 static void DrawLevelFieldCrumbledExt(int x, int y, int graphic, int frame)
2203 {
2204   int sx = SCREENX(x), sy = SCREENY(y);
2205   int element;
2206   int i;
2207   static int xy[4][2] =
2208   {
2209     { 0, -1 },
2210     { -1, 0 },
2211     { +1, 0 },
2212     { 0, +1 }
2213   };
2214
2215   if (!IN_LEV_FIELD(x, y))
2216     return;
2217
2218   element = TILE_GFX_ELEMENT(x, y);
2219
2220   if (IS_CRUMBLED_TILE(x, y, element))          // crumble field itself
2221   {
2222     if (!IN_SCR_FIELD(sx, sy))
2223       return;
2224
2225     // crumble field borders towards direct neighbour fields
2226     for (i = 0; i < 4; i++)
2227     {
2228       int xx = x + xy[i][0];
2229       int yy = y + xy[i][1];
2230
2231       element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
2232                  BorderElement);
2233
2234       // check if neighbour field is of same crumble type
2235       if (IS_CRUMBLED_TILE(xx, yy, element) &&
2236           graphic_info[graphic].class ==
2237           graphic_info[el_act2crm(element, ACTION_DEFAULT)].class)
2238         continue;
2239
2240       DrawLevelFieldCrumbledBorders(x, y, graphic, frame, i);
2241     }
2242
2243     // crumble inner field corners towards corner neighbour fields
2244     if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
2245         graphic_info[graphic].anim_frames == 2)
2246     {
2247       for (i = 0; i < 4; i++)
2248       {
2249         int dx = (i & 1 ? +1 : -1);
2250         int dy = (i & 2 ? +1 : -1);
2251
2252         DrawLevelFieldCrumbledInnerCorners(x, y, dx, dy, graphic);
2253       }
2254     }
2255
2256     MarkTileDirty(sx, sy);
2257   }
2258   else          // center field is not crumbled -- crumble neighbour fields
2259   {
2260     // crumble field borders of direct neighbour fields
2261     for (i = 0; i < 4; i++)
2262     {
2263       int xx = x + xy[i][0];
2264       int yy = y + xy[i][1];
2265       int sxx = sx + xy[i][0];
2266       int syy = sy + xy[i][1];
2267
2268       if (!IN_LEV_FIELD(xx, yy) ||
2269           !IN_SCR_FIELD(sxx, syy))
2270         continue;
2271
2272       // do not crumble fields that are being digged or snapped
2273       if (Tile[xx][yy] == EL_EMPTY ||
2274           Tile[xx][yy] == EL_ELEMENT_SNAPPING)
2275         continue;
2276
2277       element = TILE_GFX_ELEMENT(xx, yy);
2278
2279       if (!IS_CRUMBLED_TILE(xx, yy, element))
2280         continue;
2281
2282       graphic = el_act2crm(element, ACTION_DEFAULT);
2283
2284       DrawLevelFieldCrumbledBorders(xx, yy, graphic, 0, 3 - i);
2285
2286       MarkTileDirty(sxx, syy);
2287     }
2288
2289     // crumble inner field corners of corner neighbour fields
2290     for (i = 0; i < 4; i++)
2291     {
2292       int dx = (i & 1 ? +1 : -1);
2293       int dy = (i & 2 ? +1 : -1);
2294       int xx = x + dx;
2295       int yy = y + dy;
2296       int sxx = sx + dx;
2297       int syy = sy + dy;
2298
2299       if (!IN_LEV_FIELD(xx, yy) ||
2300           !IN_SCR_FIELD(sxx, syy))
2301         continue;
2302
2303       if (Tile[xx][yy] == EL_ELEMENT_SNAPPING)
2304         continue;
2305
2306       element = TILE_GFX_ELEMENT(xx, yy);
2307
2308       if (!IS_CRUMBLED_TILE(xx, yy, element))
2309         continue;
2310
2311       graphic = el_act2crm(element, ACTION_DEFAULT);
2312
2313       if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
2314           graphic_info[graphic].anim_frames == 2)
2315         DrawLevelFieldCrumbledInnerCorners(xx, yy, -dx, -dy, graphic);
2316
2317       MarkTileDirty(sxx, syy);
2318     }
2319   }
2320 }
2321
2322 void DrawLevelFieldCrumbled(int x, int y)
2323 {
2324   int graphic;
2325
2326   if (!IN_LEV_FIELD(x, y))
2327     return;
2328
2329   if (Tile[x][y] == EL_ELEMENT_SNAPPING &&
2330       GfxElement[x][y] != EL_UNDEFINED &&
2331       GFX_CRUMBLED(GfxElement[x][y]))
2332   {
2333     DrawLevelFieldCrumbledDigging(x, y, GfxDir[x][y], GfxFrame[x][y]);
2334
2335     return;
2336   }
2337
2338   graphic = el_act2crm(TILE_GFX_ELEMENT(x, y), ACTION_DEFAULT);
2339
2340   DrawLevelFieldCrumbledExt(x, y, graphic, 0);
2341 }
2342
2343 void DrawLevelFieldCrumbledDigging(int x, int y, int direction,
2344                                    int step_frame)
2345 {
2346   int graphic1 = el_act_dir2img(GfxElement[x][y], ACTION_DIGGING, direction);
2347   int graphic2 = el_act_dir2crm(GfxElement[x][y], ACTION_DIGGING, direction);
2348   int frame1 = getGraphicAnimationFrame(graphic1, step_frame);
2349   int frame2 = getGraphicAnimationFrame(graphic2, step_frame);
2350   int sx = SCREENX(x), sy = SCREENY(y);
2351
2352   DrawGraphic(sx, sy, graphic1, frame1);
2353   DrawLevelFieldCrumbledExt(x, y, graphic2, frame2);
2354 }
2355
2356 void DrawLevelFieldCrumbledNeighbours(int x, int y)
2357 {
2358   int sx = SCREENX(x), sy = SCREENY(y);
2359   static int xy[4][2] =
2360   {
2361     { 0, -1 },
2362     { -1, 0 },
2363     { +1, 0 },
2364     { 0, +1 }
2365   };
2366   int i;
2367
2368   // crumble direct neighbour fields (required for field borders)
2369   for (i = 0; i < 4; i++)
2370   {
2371     int xx = x + xy[i][0];
2372     int yy = y + xy[i][1];
2373     int sxx = sx + xy[i][0];
2374     int syy = sy + xy[i][1];
2375
2376     if (!IN_LEV_FIELD(xx, yy) ||
2377         !IN_SCR_FIELD(sxx, syy) ||
2378         !GFX_CRUMBLED(Tile[xx][yy]) ||
2379         IS_MOVING(xx, yy))
2380       continue;
2381
2382     DrawLevelField(xx, yy);
2383   }
2384
2385   // crumble corner neighbour fields (required for inner field corners)
2386   for (i = 0; i < 4; i++)
2387   {
2388     int dx = (i & 1 ? +1 : -1);
2389     int dy = (i & 2 ? +1 : -1);
2390     int xx = x + dx;
2391     int yy = y + dy;
2392     int sxx = sx + dx;
2393     int syy = sy + dy;
2394
2395     if (!IN_LEV_FIELD(xx, yy) ||
2396         !IN_SCR_FIELD(sxx, syy) ||
2397         !GFX_CRUMBLED(Tile[xx][yy]) ||
2398         IS_MOVING(xx, yy))
2399       continue;
2400
2401     int element = TILE_GFX_ELEMENT(xx, yy);
2402     int graphic = el_act2crm(element, ACTION_DEFAULT);
2403
2404     if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
2405         graphic_info[graphic].anim_frames == 2)
2406       DrawLevelField(xx, yy);
2407   }
2408 }
2409
2410 static int getBorderElement(int x, int y)
2411 {
2412   int border[7][2] =
2413   {
2414     { EL_STEELWALL_TOPLEFT,             EL_INVISIBLE_STEELWALL_TOPLEFT     },
2415     { EL_STEELWALL_TOPRIGHT,            EL_INVISIBLE_STEELWALL_TOPRIGHT    },
2416     { EL_STEELWALL_BOTTOMLEFT,          EL_INVISIBLE_STEELWALL_BOTTOMLEFT  },
2417     { EL_STEELWALL_BOTTOMRIGHT,         EL_INVISIBLE_STEELWALL_BOTTOMRIGHT },
2418     { EL_STEELWALL_VERTICAL,            EL_INVISIBLE_STEELWALL_VERTICAL    },
2419     { EL_STEELWALL_HORIZONTAL,          EL_INVISIBLE_STEELWALL_HORIZONTAL  },
2420     { EL_STEELWALL,                     EL_INVISIBLE_STEELWALL             }
2421   };
2422   int steel_type = (BorderElement == EL_STEELWALL ? 0 : 1);
2423   int steel_position = (x == -1         && y == -1              ? 0 :
2424                         x == lev_fieldx && y == -1              ? 1 :
2425                         x == -1         && y == lev_fieldy      ? 2 :
2426                         x == lev_fieldx && y == lev_fieldy      ? 3 :
2427                         x == -1         || x == lev_fieldx      ? 4 :
2428                         y == -1         || y == lev_fieldy      ? 5 : 6);
2429
2430   return border[steel_position][steel_type];
2431 }
2432
2433 void DrawScreenElement(int x, int y, int element)
2434 {
2435   DrawScreenElementExt(x, y, 0, 0, element, NO_CUTTING, NO_MASKING);
2436   DrawLevelFieldCrumbled(LEVELX(x), LEVELY(y));
2437 }
2438
2439 void DrawLevelElement(int x, int y, int element)
2440 {
2441   if (IN_LEV_FIELD(x, y) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
2442     DrawScreenElement(SCREENX(x), SCREENY(y), element);
2443 }
2444
2445 void DrawScreenField(int x, int y)
2446 {
2447   int lx = LEVELX(x), ly = LEVELY(y);
2448   int element, content;
2449
2450   if (!IN_LEV_FIELD(lx, ly))
2451   {
2452     if (lx < -1 || lx > lev_fieldx || ly < -1 || ly > lev_fieldy)
2453       element = EL_EMPTY;
2454     else
2455       element = getBorderElement(lx, ly);
2456
2457     DrawScreenElement(x, y, element);
2458
2459     return;
2460   }
2461
2462   element = Tile[lx][ly];
2463   content = Store[lx][ly];
2464
2465   if (IS_MOVING(lx, ly))
2466   {
2467     int horiz_move = (MovDir[lx][ly] == MV_LEFT || MovDir[lx][ly] == MV_RIGHT);
2468     boolean cut_mode = NO_CUTTING;
2469
2470     if (element == EL_QUICKSAND_EMPTYING ||
2471         element == EL_QUICKSAND_FAST_EMPTYING ||
2472         element == EL_MAGIC_WALL_EMPTYING ||
2473         element == EL_BD_MAGIC_WALL_EMPTYING ||
2474         element == EL_DC_MAGIC_WALL_EMPTYING ||
2475         element == EL_AMOEBA_DROPPING)
2476       cut_mode = CUT_ABOVE;
2477     else if (element == EL_QUICKSAND_FILLING ||
2478              element == EL_QUICKSAND_FAST_FILLING ||
2479              element == EL_MAGIC_WALL_FILLING ||
2480              element == EL_BD_MAGIC_WALL_FILLING ||
2481              element == EL_DC_MAGIC_WALL_FILLING)
2482       cut_mode = CUT_BELOW;
2483
2484     if (cut_mode == CUT_ABOVE)
2485       DrawScreenElement(x, y, element);
2486     else
2487       DrawScreenElement(x, y, EL_EMPTY);
2488
2489     if (horiz_move)
2490       DrawScreenElementShifted(x, y, MovPos[lx][ly], 0, element, NO_CUTTING);
2491     else if (cut_mode == NO_CUTTING)
2492       DrawScreenElementShifted(x, y, 0, MovPos[lx][ly], element, cut_mode);
2493     else
2494     {
2495       DrawScreenElementShifted(x, y, 0, MovPos[lx][ly], content, cut_mode);
2496
2497       if (cut_mode == CUT_BELOW &&
2498           IN_LEV_FIELD(lx, ly + 1) && IN_SCR_FIELD(x, y + 1))
2499         DrawLevelElement(lx, ly + 1, element);
2500     }
2501
2502     if (content == EL_ACID)
2503     {
2504       int dir = MovDir[lx][ly];
2505       int newlx = lx + (dir == MV_LEFT ? -1 : dir == MV_RIGHT ? +1 : 0);
2506       int newly = ly + (dir == MV_UP   ? -1 : dir == MV_DOWN  ? +1 : 0);
2507
2508       DrawLevelElementThruMask(newlx, newly, EL_ACID);
2509
2510       // prevent target field from being drawn again (but without masking)
2511       // (this would happen if target field is scanned after moving element)
2512       Stop[newlx][newly] = TRUE;
2513     }
2514   }
2515   else if (IS_BLOCKED(lx, ly))
2516   {
2517     int oldx, oldy;
2518     int sx, sy;
2519     int horiz_move;
2520     boolean cut_mode = NO_CUTTING;
2521     int element_old, content_old;
2522
2523     Blocked2Moving(lx, ly, &oldx, &oldy);
2524     sx = SCREENX(oldx);
2525     sy = SCREENY(oldy);
2526     horiz_move = (MovDir[oldx][oldy] == MV_LEFT ||
2527                   MovDir[oldx][oldy] == MV_RIGHT);
2528
2529     element_old = Tile[oldx][oldy];
2530     content_old = Store[oldx][oldy];
2531
2532     if (element_old == EL_QUICKSAND_EMPTYING ||
2533         element_old == EL_QUICKSAND_FAST_EMPTYING ||
2534         element_old == EL_MAGIC_WALL_EMPTYING ||
2535         element_old == EL_BD_MAGIC_WALL_EMPTYING ||
2536         element_old == EL_DC_MAGIC_WALL_EMPTYING ||
2537         element_old == EL_AMOEBA_DROPPING)
2538       cut_mode = CUT_ABOVE;
2539
2540     DrawScreenElement(x, y, EL_EMPTY);
2541
2542     if (horiz_move)
2543       DrawScreenElementShifted(sx, sy, MovPos[oldx][oldy], 0, element_old,
2544                                NO_CUTTING);
2545     else if (cut_mode == NO_CUTTING)
2546       DrawScreenElementShifted(sx, sy, 0, MovPos[oldx][oldy], element_old,
2547                                cut_mode);
2548     else
2549       DrawScreenElementShifted(sx, sy, 0, MovPos[oldx][oldy], content_old,
2550                                cut_mode);
2551   }
2552   else if (IS_DRAWABLE(element))
2553     DrawScreenElement(x, y, element);
2554   else
2555     DrawScreenElement(x, y, EL_EMPTY);
2556 }
2557
2558 void DrawLevelField(int x, int y)
2559 {
2560   if (IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
2561     DrawScreenField(SCREENX(x), SCREENY(y));
2562   else if (IS_MOVING(x, y))
2563   {
2564     int newx,newy;
2565
2566     Moving2Blocked(x, y, &newx, &newy);
2567     if (IN_SCR_FIELD(SCREENX(newx), SCREENY(newy)))
2568       DrawScreenField(SCREENX(newx), SCREENY(newy));
2569   }
2570   else if (IS_BLOCKED(x, y))
2571   {
2572     int oldx, oldy;
2573
2574     Blocked2Moving(x, y, &oldx, &oldy);
2575     if (IN_SCR_FIELD(SCREENX(oldx), SCREENY(oldy)))
2576       DrawScreenField(SCREENX(oldx), SCREENY(oldy));
2577   }
2578 }
2579
2580 static void DrawSizedWallExt_MM(int dst_x, int dst_y, int element, int tilesize,
2581                                 int (*el2img_function)(int), boolean masked,
2582                                 int element_bits_draw)
2583 {
2584   int element_base = map_mm_wall_element(element);
2585   int element_bits = (IS_DF_WALL(element) ?
2586                       element - EL_DF_WALL_START :
2587                       IS_MM_WALL(element) ?
2588                       element - EL_MM_WALL_START : EL_EMPTY) & 0x000f;
2589   int graphic = el2img_function(element_base);
2590   int tilesize_draw = tilesize / 2;
2591   Bitmap *src_bitmap;
2592   int src_x, src_y;
2593   int i;
2594
2595   getSizedGraphicSource(graphic, 0, tilesize_draw, &src_bitmap, &src_x, &src_y);
2596
2597   for (i = 0; i < 4; i++)
2598   {
2599     int dst_draw_x = dst_x + (i % 2) * tilesize_draw;
2600     int dst_draw_y = dst_y + (i / 2) * tilesize_draw;
2601
2602     if (!(element_bits_draw & (1 << i)))
2603       continue;
2604
2605     if (element_bits & (1 << i))
2606     {
2607       if (masked)
2608         BlitBitmapMasked(src_bitmap, drawto, src_x, src_y,
2609                          tilesize_draw, tilesize_draw, dst_draw_x, dst_draw_y);
2610       else
2611         BlitBitmap(src_bitmap, drawto, src_x, src_y,
2612                    tilesize_draw, tilesize_draw, dst_draw_x, dst_draw_y);
2613     }
2614     else
2615     {
2616       if (!masked)
2617         ClearRectangle(drawto, dst_draw_x, dst_draw_y,
2618                        tilesize_draw, tilesize_draw);
2619     }
2620   }
2621 }
2622
2623 void DrawSizedWallParts_MM(int x, int y, int element, int tilesize,
2624                            boolean masked, int element_bits_draw)
2625 {
2626   DrawSizedWallExt_MM(SX + x * tilesize, SY + y * tilesize,
2627                       element, tilesize, el2edimg, masked, element_bits_draw);
2628 }
2629
2630 static void DrawSizedWall_MM(int dst_x, int dst_y, int element, int tilesize,
2631                              int (*el2img_function)(int))
2632 {
2633   DrawSizedWallExt_MM(dst_x, dst_y, element, tilesize, el2img_function, FALSE,
2634                       0x000f);
2635 }
2636
2637 static void DrawSizedElementExt(int x, int y, int element, int tilesize,
2638                                 boolean masked)
2639 {
2640   if (IS_MM_WALL(element))
2641   {
2642     DrawSizedWallExt_MM(SX + x * tilesize, SY + y * tilesize,
2643                         element, tilesize, el2edimg, masked, 0x000f);
2644   }
2645   else
2646   {
2647     int graphic = el2edimg(element);
2648
2649     if (masked)
2650       DrawSizedGraphicThruMask(x, y, graphic, 0, tilesize);
2651     else
2652       DrawSizedGraphic(x, y, graphic, 0, tilesize);
2653   }
2654 }
2655
2656 void DrawSizedElement(int x, int y, int element, int tilesize)
2657 {
2658   DrawSizedElementExt(x, y, element, tilesize, FALSE);
2659 }
2660
2661 void DrawSizedElementThruMask(int x, int y, int element, int tilesize)
2662 {
2663   DrawSizedElementExt(x, y, element, tilesize, TRUE);
2664 }
2665
2666 void DrawMiniElement(int x, int y, int element)
2667 {
2668   int graphic;
2669
2670   graphic = el2edimg(element);
2671   DrawMiniGraphic(x, y, graphic);
2672 }
2673
2674 void DrawSizedElementOrWall(int sx, int sy, int scroll_x, int scroll_y,
2675                             int tilesize)
2676 {
2677   int x = sx + scroll_x, y = sy + scroll_y;
2678
2679   if (x < -1 || x > lev_fieldx || y < -1 || y > lev_fieldy)
2680     DrawSizedElement(sx, sy, EL_EMPTY, tilesize);
2681   else if (x > -1 && x < lev_fieldx && y > -1 && y < lev_fieldy)
2682     DrawSizedElement(sx, sy, Tile[x][y], tilesize);
2683   else
2684     DrawSizedGraphic(sx, sy, el2edimg(getBorderElement(x, y)), 0, tilesize);
2685 }
2686
2687 void DrawMiniElementOrWall(int sx, int sy, int scroll_x, int scroll_y)
2688 {
2689   int x = sx + scroll_x, y = sy + scroll_y;
2690
2691   if (x < -1 || x > lev_fieldx || y < -1 || y > lev_fieldy)
2692     DrawMiniElement(sx, sy, EL_EMPTY);
2693   else if (x > -1 && x < lev_fieldx && y > -1 && y < lev_fieldy)
2694     DrawMiniElement(sx, sy, Tile[x][y]);
2695   else
2696     DrawMiniGraphic(sx, sy, el2edimg(getBorderElement(x, y)));
2697 }
2698
2699 static void DrawEnvelopeBackgroundTiles(int graphic, int startx, int starty,
2700                                         int x, int y, int xsize, int ysize,
2701                                         int tile_width, int tile_height)
2702 {
2703   Bitmap *src_bitmap;
2704   int src_x, src_y;
2705   int dst_x = startx + x * tile_width;
2706   int dst_y = starty + y * tile_height;
2707   int width  = graphic_info[graphic].width;
2708   int height = graphic_info[graphic].height;
2709   int inner_width_raw  = MAX(width  - 2 * tile_width,  tile_width);
2710   int inner_height_raw = MAX(height - 2 * tile_height, tile_height);
2711   int inner_width  = inner_width_raw  - (inner_width_raw  % tile_width);
2712   int inner_height = inner_height_raw - (inner_height_raw % tile_height);
2713   int inner_sx = (width  >= 3 * tile_width  ? tile_width  : 0);
2714   int inner_sy = (height >= 3 * tile_height ? tile_height : 0);
2715   boolean draw_masked = graphic_info[graphic].draw_masked;
2716
2717   getFixedGraphicSource(graphic, 0, &src_bitmap, &src_x, &src_y);
2718
2719   if (src_bitmap == NULL || width < tile_width || height < tile_height)
2720   {
2721     ClearRectangle(drawto, dst_x, dst_y, tile_width, tile_height);
2722     return;
2723   }
2724
2725   src_x += (x == 0 ? 0 : x == xsize - 1 ? width  - tile_width  :
2726             inner_sx + (x - 1) * tile_width  % inner_width);
2727   src_y += (y == 0 ? 0 : y == ysize - 1 ? height - tile_height :
2728             inner_sy + (y - 1) * tile_height % inner_height);
2729
2730   if (draw_masked)
2731     BlitBitmapMasked(src_bitmap, drawto, src_x, src_y, tile_width, tile_height,
2732                      dst_x, dst_y);
2733   else
2734     BlitBitmap(src_bitmap, drawto, src_x, src_y, tile_width, tile_height,
2735                dst_x, dst_y);
2736 }
2737
2738 static void DrawEnvelopeBackground(int graphic, int startx, int starty,
2739                                    int x, int y, int xsize, int ysize,
2740                                    int font_nr)
2741 {
2742   int font_width  = getFontWidth(font_nr);
2743   int font_height = getFontHeight(font_nr);
2744
2745   DrawEnvelopeBackgroundTiles(graphic, startx, starty, x, y, xsize, ysize,
2746                               font_width, font_height);
2747 }
2748
2749 static void AnimateEnvelope(int envelope_nr, int anim_mode, int action)
2750 {
2751   int graphic = IMG_BACKGROUND_ENVELOPE_1 + envelope_nr;
2752   Bitmap *src_bitmap = graphic_info[graphic].bitmap;
2753   int mask_mode = (src_bitmap != NULL ? BLIT_MASKED : BLIT_ON_BACKGROUND);
2754   boolean ffwd_delay = (tape.playing && tape.fast_forward);
2755   boolean no_delay = (tape.warp_forward);
2756   unsigned int anim_delay = 0;
2757   int frame_delay_value = (ffwd_delay ? FfwdFrameDelay : GameFrameDelay);
2758   int anim_delay_value = MAX(1, (no_delay ? 0 : frame_delay_value) / 2);
2759   int font_nr = FONT_ENVELOPE_1 + envelope_nr;
2760   int font_width = getFontWidth(font_nr);
2761   int font_height = getFontHeight(font_nr);
2762   int max_xsize = level.envelope[envelope_nr].xsize;
2763   int max_ysize = level.envelope[envelope_nr].ysize;
2764   int xstart = (anim_mode & ANIM_VERTICAL ? max_xsize : 0);
2765   int ystart = (anim_mode & ANIM_HORIZONTAL ? max_ysize : 0);
2766   int xend = max_xsize;
2767   int yend = (anim_mode != ANIM_DEFAULT ? max_ysize : 0);
2768   int xstep = (xstart < xend ? 1 : 0);
2769   int ystep = (ystart < yend || xstep == 0 ? 1 : 0);
2770   int start = 0;
2771   int end = MAX(xend - xstart, yend - ystart);
2772   int i;
2773
2774   for (i = start; i <= end; i++)
2775   {
2776     int last_frame = end;       // last frame of this "for" loop
2777     int x = xstart + i * xstep;
2778     int y = ystart + i * ystep;
2779     int xsize = (action == ACTION_CLOSING ? xend - (x - xstart) : x) + 2;
2780     int ysize = (action == ACTION_CLOSING ? yend - (y - ystart) : y) + 2;
2781     int sx = SX + (SXSIZE - xsize * font_width)  / 2;
2782     int sy = SY + (SYSIZE - ysize * font_height) / 2;
2783     int xx, yy;
2784
2785     SetDrawtoField(DRAW_TO_FIELDBUFFER);
2786
2787     BlitScreenToBitmap(backbuffer);
2788
2789     SetDrawtoField(DRAW_TO_BACKBUFFER);
2790
2791     for (yy = 0; yy < ysize; yy++)
2792       for (xx = 0; xx < xsize; xx++)
2793         DrawEnvelopeBackground(graphic, sx, sy, xx, yy, xsize, ysize, font_nr);
2794
2795     DrawTextBuffer(sx + font_width, sy + font_height,
2796                    level.envelope[envelope_nr].text, font_nr, max_xsize,
2797                    xsize - 2, ysize - 2, 0, mask_mode,
2798                    level.envelope[envelope_nr].autowrap,
2799                    level.envelope[envelope_nr].centered, FALSE);
2800
2801     redraw_mask |= REDRAW_FIELD;
2802     BackToFront();
2803
2804     SkipUntilDelayReached(&anim_delay, anim_delay_value, &i, last_frame);
2805   }
2806
2807   ClearAutoRepeatKeyEvents();
2808 }
2809
2810 void ShowEnvelope(int envelope_nr)
2811 {
2812   int element = EL_ENVELOPE_1 + envelope_nr;
2813   int graphic = IMG_BACKGROUND_ENVELOPE_1 + envelope_nr;
2814   int sound_opening = element_info[element].sound[ACTION_OPENING];
2815   int sound_closing = element_info[element].sound[ACTION_CLOSING];
2816   boolean ffwd_delay = (tape.playing && tape.fast_forward);
2817   boolean no_delay = (tape.warp_forward);
2818   int normal_delay_value = ONE_SECOND_DELAY / (ffwd_delay ? 2 : 1);
2819   int wait_delay_value = (no_delay ? 0 : normal_delay_value);
2820   int anim_mode = graphic_info[graphic].anim_mode;
2821   int main_anim_mode = (anim_mode == ANIM_NONE ? ANIM_VERTICAL|ANIM_HORIZONTAL:
2822                         anim_mode == ANIM_DEFAULT ? ANIM_VERTICAL : anim_mode);
2823
2824   game.envelope_active = TRUE;  // needed for RedrawPlayfield() events
2825
2826   PlayMenuSoundStereo(sound_opening, SOUND_MIDDLE);
2827
2828   if (anim_mode == ANIM_DEFAULT)
2829     AnimateEnvelope(envelope_nr, ANIM_DEFAULT, ACTION_OPENING);
2830
2831   AnimateEnvelope(envelope_nr, main_anim_mode, ACTION_OPENING);
2832
2833   if (tape.playing)
2834     Delay_WithScreenUpdates(wait_delay_value);
2835   else
2836     WaitForEventToContinue();
2837
2838   PlayMenuSoundStereo(sound_closing, SOUND_MIDDLE);
2839
2840   if (anim_mode != ANIM_NONE)
2841     AnimateEnvelope(envelope_nr, main_anim_mode, ACTION_CLOSING);
2842
2843   if (anim_mode == ANIM_DEFAULT)
2844     AnimateEnvelope(envelope_nr, ANIM_DEFAULT, ACTION_CLOSING);
2845
2846   game.envelope_active = FALSE;
2847
2848   SetDrawtoField(DRAW_TO_FIELDBUFFER);
2849
2850   redraw_mask |= REDRAW_FIELD;
2851   BackToFront();
2852 }
2853
2854 static void setRequestBasePosition(int *x, int *y)
2855 {
2856   int sx_base, sy_base;
2857
2858   if (request.x != -1)
2859     sx_base = request.x;
2860   else if (request.align == ALIGN_LEFT)
2861     sx_base = SX;
2862   else if (request.align == ALIGN_RIGHT)
2863     sx_base = SX + SXSIZE;
2864   else
2865     sx_base = SX + SXSIZE / 2;
2866
2867   if (request.y != -1)
2868     sy_base = request.y;
2869   else if (request.valign == VALIGN_TOP)
2870     sy_base = SY;
2871   else if (request.valign == VALIGN_BOTTOM)
2872     sy_base = SY + SYSIZE;
2873   else
2874     sy_base = SY + SYSIZE / 2;
2875
2876   *x = sx_base;
2877   *y = sy_base;
2878 }
2879
2880 static void setRequestPositionExt(int *x, int *y, int width, int height,
2881                                   boolean add_border_size)
2882 {
2883   int border_size = request.border_size;
2884   int sx_base, sy_base;
2885   int sx, sy;
2886
2887   setRequestBasePosition(&sx_base, &sy_base);
2888
2889   if (request.align == ALIGN_LEFT)
2890     sx = sx_base;
2891   else if (request.align == ALIGN_RIGHT)
2892     sx = sx_base - width;
2893   else
2894     sx = sx_base - width  / 2;
2895
2896   if (request.valign == VALIGN_TOP)
2897     sy = sy_base;
2898   else if (request.valign == VALIGN_BOTTOM)
2899     sy = sy_base - height;
2900   else
2901     sy = sy_base - height / 2;
2902
2903   sx = MAX(0, MIN(sx, WIN_XSIZE - width));
2904   sy = MAX(0, MIN(sy, WIN_YSIZE - height));
2905
2906   if (add_border_size)
2907   {
2908     sx += border_size;
2909     sy += border_size;
2910   }
2911
2912   *x = sx;
2913   *y = sy;
2914 }
2915
2916 static void setRequestPosition(int *x, int *y, boolean add_border_size)
2917 {
2918   setRequestPositionExt(x, y, request.width, request.height, add_border_size);
2919 }
2920
2921 static void DrawEnvelopeRequest(char *text)
2922 {
2923   char *text_final = text;
2924   char *text_door_style = NULL;
2925   int graphic = IMG_BACKGROUND_REQUEST;
2926   Bitmap *src_bitmap = graphic_info[graphic].bitmap;
2927   int mask_mode = (src_bitmap != NULL ? BLIT_MASKED : BLIT_ON_BACKGROUND);
2928   int font_nr = FONT_REQUEST;
2929   int font_width = getFontWidth(font_nr);
2930   int font_height = getFontHeight(font_nr);
2931   int border_size = request.border_size;
2932   int line_spacing = request.line_spacing;
2933   int line_height = font_height + line_spacing;
2934   int max_text_width  = request.width  - 2 * border_size;
2935   int max_text_height = request.height - 2 * border_size;
2936   int line_length = max_text_width  / font_width;
2937   int max_lines   = max_text_height / line_height;
2938   int text_width = line_length * font_width;
2939   int width = request.width;
2940   int height = request.height;
2941   int tile_size = MAX(request.step_offset, 1);
2942   int x_steps = width  / tile_size;
2943   int y_steps = height / tile_size;
2944   int sx_offset = border_size;
2945   int sy_offset = border_size;
2946   int sx, sy;
2947   int i, x, y;
2948
2949   if (request.centered)
2950     sx_offset = (request.width - text_width) / 2;
2951
2952   if (request.wrap_single_words && !request.autowrap)
2953   {
2954     char *src_text_ptr, *dst_text_ptr;
2955
2956     text_door_style = checked_malloc(2 * strlen(text) + 1);
2957
2958     src_text_ptr = text;
2959     dst_text_ptr = text_door_style;
2960
2961     while (*src_text_ptr)
2962     {
2963       if (*src_text_ptr == ' ' ||
2964           *src_text_ptr == '?' ||
2965           *src_text_ptr == '!')
2966         *dst_text_ptr++ = '\n';
2967
2968       if (*src_text_ptr != ' ')
2969         *dst_text_ptr++ = *src_text_ptr;
2970
2971       src_text_ptr++;
2972     }
2973
2974     *dst_text_ptr = '\0';
2975
2976     text_final = text_door_style;
2977   }
2978
2979   setRequestPosition(&sx, &sy, FALSE);
2980
2981   ClearRectangle(backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE);
2982
2983   for (y = 0; y < y_steps; y++)
2984     for (x = 0; x < x_steps; x++)
2985       DrawEnvelopeBackgroundTiles(graphic, sx, sy,
2986                                   x, y, x_steps, y_steps,
2987                                   tile_size, tile_size);
2988
2989   // force DOOR font inside door area
2990   SetFontStatus(GAME_MODE_PSEUDO_DOOR);
2991
2992   DrawTextBuffer(sx + sx_offset, sy + sy_offset, text_final, font_nr,
2993                  line_length, -1, max_lines, line_spacing, mask_mode,
2994                  request.autowrap, request.centered, FALSE);
2995
2996   ResetFontStatus();
2997
2998   for (i = 0; i < NUM_TOOL_BUTTONS; i++)
2999     RedrawGadget(tool_gadget[i]);
3000
3001   // store readily prepared envelope request for later use when animating
3002   BlitBitmap(backbuffer, bitmap_db_store_2, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
3003
3004   if (text_door_style)
3005     free(text_door_style);
3006 }
3007
3008 static void AnimateEnvelopeRequest(int anim_mode, int action)
3009 {
3010   int graphic = IMG_BACKGROUND_REQUEST;
3011   boolean draw_masked = graphic_info[graphic].draw_masked;
3012   int delay_value_normal = request.step_delay;
3013   int delay_value_fast = delay_value_normal / 2;
3014   boolean ffwd_delay = (tape.playing && tape.fast_forward);
3015   boolean no_delay = (tape.warp_forward);
3016   int delay_value = (ffwd_delay ? delay_value_fast : delay_value_normal);
3017   int anim_delay_value = MAX(1, (no_delay ? 0 : delay_value + 500 * 0) / 2);
3018   unsigned int anim_delay = 0;
3019
3020   int tile_size = MAX(request.step_offset, 1);
3021   int max_xsize = request.width  / tile_size;
3022   int max_ysize = request.height / tile_size;
3023   int max_xsize_inner = max_xsize - 2;
3024   int max_ysize_inner = max_ysize - 2;
3025
3026   int xstart = (anim_mode & ANIM_VERTICAL ? max_xsize_inner : 0);
3027   int ystart = (anim_mode & ANIM_HORIZONTAL ? max_ysize_inner : 0);
3028   int xend = max_xsize_inner;
3029   int yend = (anim_mode != ANIM_DEFAULT ? max_ysize_inner : 0);
3030   int xstep = (xstart < xend ? 1 : 0);
3031   int ystep = (ystart < yend || xstep == 0 ? 1 : 0);
3032   int start = 0;
3033   int end = MAX(xend - xstart, yend - ystart);
3034   int i;
3035
3036   if (setup.quick_doors)
3037   {
3038     xstart = xend;
3039     ystart = yend;
3040     end = 0;
3041   }
3042
3043   for (i = start; i <= end; i++)
3044   {
3045     int last_frame = end;       // last frame of this "for" loop
3046     int x = xstart + i * xstep;
3047     int y = ystart + i * ystep;
3048     int xsize = (action == ACTION_CLOSING ? xend - (x - xstart) : x) + 2;
3049     int ysize = (action == ACTION_CLOSING ? yend - (y - ystart) : y) + 2;
3050     int xsize_size_left = (xsize - 1) * tile_size;
3051     int ysize_size_top  = (ysize - 1) * tile_size;
3052     int max_xsize_pos = (max_xsize - 1) * tile_size;
3053     int max_ysize_pos = (max_ysize - 1) * tile_size;
3054     int width  = xsize * tile_size;
3055     int height = ysize * tile_size;
3056     int src_x, src_y;
3057     int dst_x, dst_y;
3058     int xx, yy;
3059
3060     setRequestPosition(&src_x, &src_y, FALSE);
3061     setRequestPositionExt(&dst_x, &dst_y, width, height, FALSE);
3062
3063     BlitBitmap(bitmap_db_store_1, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
3064
3065     for (yy = 0; yy < 2; yy++)
3066     {
3067       for (xx = 0; xx < 2; xx++)
3068       {
3069         int src_xx = src_x + xx * max_xsize_pos;
3070         int src_yy = src_y + yy * max_ysize_pos;
3071         int dst_xx = dst_x + xx * xsize_size_left;
3072         int dst_yy = dst_y + yy * ysize_size_top;
3073         int xx_size = (xx ? tile_size : xsize_size_left);
3074         int yy_size = (yy ? tile_size : ysize_size_top);
3075
3076         if (draw_masked)
3077           BlitBitmapMasked(bitmap_db_store_2, backbuffer,
3078                            src_xx, src_yy, xx_size, yy_size, dst_xx, dst_yy);
3079         else
3080           BlitBitmap(bitmap_db_store_2, backbuffer,
3081                      src_xx, src_yy, xx_size, yy_size, dst_xx, dst_yy);
3082       }
3083     }
3084
3085     redraw_mask |= REDRAW_FIELD;
3086
3087     BackToFront();
3088
3089     SkipUntilDelayReached(&anim_delay, anim_delay_value, &i, last_frame);
3090   }
3091
3092   ClearAutoRepeatKeyEvents();
3093 }
3094
3095 static void ShowEnvelopeRequest(char *text, unsigned int req_state, int action)
3096 {
3097   int graphic = IMG_BACKGROUND_REQUEST;
3098   int sound_opening = SND_REQUEST_OPENING;
3099   int sound_closing = SND_REQUEST_CLOSING;
3100   int anim_mode_1 = request.anim_mode;                  // (higher priority)
3101   int anim_mode_2 = graphic_info[graphic].anim_mode;    // (lower priority)
3102   int anim_mode = (anim_mode_1 != ANIM_DEFAULT ? anim_mode_1 : anim_mode_2);
3103   int main_anim_mode = (anim_mode == ANIM_NONE ? ANIM_VERTICAL|ANIM_HORIZONTAL:
3104                         anim_mode == ANIM_DEFAULT ? ANIM_VERTICAL : anim_mode);
3105
3106   if (game_status == GAME_MODE_PLAYING)
3107     BlitScreenToBitmap(backbuffer);
3108
3109   SetDrawtoField(DRAW_TO_BACKBUFFER);
3110
3111   // SetDrawBackgroundMask(REDRAW_NONE);
3112
3113   if (action == ACTION_OPENING)
3114   {
3115     BlitBitmap(backbuffer, bitmap_db_store_1, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
3116
3117     if (req_state & REQ_ASK)
3118     {
3119       MapGadget(tool_gadget[TOOL_CTRL_ID_YES]);
3120       MapGadget(tool_gadget[TOOL_CTRL_ID_NO]);
3121       MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_YES]);
3122       MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_NO]);
3123     }
3124     else if (req_state & REQ_CONFIRM)
3125     {
3126       MapGadget(tool_gadget[TOOL_CTRL_ID_CONFIRM]);
3127       MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_CONFIRM]);
3128     }
3129     else if (req_state & REQ_PLAYER)
3130     {
3131       MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_1]);
3132       MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_2]);
3133       MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_3]);
3134       MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_4]);
3135     }
3136
3137     DrawEnvelopeRequest(text);
3138   }
3139
3140   game.envelope_active = TRUE;  // needed for RedrawPlayfield() events
3141
3142   if (action == ACTION_OPENING)
3143   {
3144     PlayMenuSoundStereo(sound_opening, SOUND_MIDDLE);
3145
3146     if (anim_mode == ANIM_DEFAULT)
3147       AnimateEnvelopeRequest(ANIM_DEFAULT, ACTION_OPENING);
3148
3149     AnimateEnvelopeRequest(main_anim_mode, ACTION_OPENING);
3150   }
3151   else
3152   {
3153     PlayMenuSoundStereo(sound_closing, SOUND_MIDDLE);
3154
3155     if (anim_mode != ANIM_NONE)
3156       AnimateEnvelopeRequest(main_anim_mode, ACTION_CLOSING);
3157
3158     if (anim_mode == ANIM_DEFAULT)
3159       AnimateEnvelopeRequest(ANIM_DEFAULT, ACTION_CLOSING);
3160   }
3161
3162   game.envelope_active = FALSE;
3163
3164   if (action == ACTION_CLOSING)
3165     BlitBitmap(bitmap_db_store_1, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
3166
3167   // SetDrawBackgroundMask(last_draw_background_mask);
3168
3169   redraw_mask |= REDRAW_FIELD;
3170
3171   BackToFront();
3172
3173   if (action == ACTION_CLOSING &&
3174       game_status == GAME_MODE_PLAYING &&
3175       level.game_engine_type == GAME_ENGINE_TYPE_RND)
3176     SetDrawtoField(DRAW_TO_FIELDBUFFER);
3177 }
3178
3179 static void DrawPreviewElement(int dst_x, int dst_y, int element, int tilesize)
3180 {
3181   if (IS_MM_WALL(element))
3182   {
3183     DrawSizedWall_MM(dst_x, dst_y, element, tilesize, el2preimg);
3184   }
3185   else
3186   {
3187     Bitmap *src_bitmap;
3188     int src_x, src_y;
3189     int graphic = el2preimg(element);
3190
3191     getSizedGraphicSource(graphic, 0, tilesize, &src_bitmap, &src_x, &src_y);
3192     BlitBitmap(src_bitmap, drawto, src_x, src_y, tilesize, tilesize,
3193                dst_x, dst_y);
3194   }
3195 }
3196
3197 void DrawLevel(int draw_background_mask)
3198 {
3199   int x,y;
3200
3201   SetMainBackgroundImage(IMG_BACKGROUND_PLAYING);
3202   SetDrawBackgroundMask(draw_background_mask);
3203
3204   ClearField();
3205
3206   for (x = BX1; x <= BX2; x++)
3207     for (y = BY1; y <= BY2; y++)
3208       DrawScreenField(x, y);
3209
3210   redraw_mask |= REDRAW_FIELD;
3211 }
3212
3213 void DrawSizedLevel(int size_x, int size_y, int scroll_x, int scroll_y,
3214                     int tilesize)
3215 {
3216   int x,y;
3217
3218   for (x = 0; x < size_x; x++)
3219     for (y = 0; y < size_y; y++)
3220       DrawSizedElementOrWall(x, y, scroll_x, scroll_y, tilesize);
3221
3222   redraw_mask |= REDRAW_FIELD;
3223 }
3224
3225 void DrawMiniLevel(int size_x, int size_y, int scroll_x, int scroll_y)
3226 {
3227   int x,y;
3228
3229   for (x = 0; x < size_x; x++)
3230     for (y = 0; y < size_y; y++)
3231       DrawMiniElementOrWall(x, y, scroll_x, scroll_y);
3232
3233   redraw_mask |= REDRAW_FIELD;
3234 }
3235
3236 static void DrawPreviewLevelPlayfield(int from_x, int from_y)
3237 {
3238   boolean show_level_border = (BorderElement != EL_EMPTY);
3239   int level_xsize = lev_fieldx + (show_level_border ? 2 : 0);
3240   int level_ysize = lev_fieldy + (show_level_border ? 2 : 0);
3241   int tile_size = preview.tile_size;
3242   int preview_width  = preview.xsize * tile_size;
3243   int preview_height = preview.ysize * tile_size;
3244   int real_preview_xsize = MIN(level_xsize, preview.xsize);
3245   int real_preview_ysize = MIN(level_ysize, preview.ysize);
3246   int real_preview_width  = real_preview_xsize * tile_size;
3247   int real_preview_height = real_preview_ysize * tile_size;
3248   int dst_x = SX + ALIGNED_XPOS(preview.x, preview_width, preview.align);
3249   int dst_y = SY + ALIGNED_YPOS(preview.y, preview_height, preview.valign);
3250   int x, y;
3251
3252   if (!IN_GFX_FIELD_FULL(dst_x, dst_y + preview_height - 1))
3253     return;
3254
3255   DrawBackground(dst_x, dst_y, preview_width, preview_height);
3256
3257   dst_x += (preview_width  - real_preview_width)  / 2;
3258   dst_y += (preview_height - real_preview_height) / 2;
3259
3260   for (x = 0; x < real_preview_xsize; x++)
3261   {
3262     for (y = 0; y < real_preview_ysize; y++)
3263     {
3264       int lx = from_x + x + (show_level_border ? -1 : 0);
3265       int ly = from_y + y + (show_level_border ? -1 : 0);
3266       int element = (IN_LEV_FIELD(lx, ly) ? level.field[lx][ly] :
3267                      getBorderElement(lx, ly));
3268
3269       DrawPreviewElement(dst_x + x * tile_size, dst_y + y * tile_size,
3270                          element, tile_size);
3271     }
3272   }
3273
3274   redraw_mask |= REDRAW_FIELD;
3275 }
3276
3277 #define MICROLABEL_EMPTY                0
3278 #define MICROLABEL_LEVEL_NAME           1
3279 #define MICROLABEL_LEVEL_AUTHOR_HEAD    2
3280 #define MICROLABEL_LEVEL_AUTHOR         3
3281 #define MICROLABEL_IMPORTED_FROM_HEAD   4
3282 #define MICROLABEL_IMPORTED_FROM        5
3283 #define MICROLABEL_IMPORTED_BY_HEAD     6
3284 #define MICROLABEL_IMPORTED_BY          7
3285
3286 static int getMaxTextLength(struct TextPosInfo *pos, int font_nr)
3287 {
3288   int max_text_width = SXSIZE;
3289   int font_width = getFontWidth(font_nr);
3290
3291   if (pos->align == ALIGN_CENTER)
3292     max_text_width = (pos->x < SXSIZE / 2 ? pos->x * 2 : (SXSIZE - pos->x) * 2);
3293   else if (pos->align == ALIGN_RIGHT)
3294     max_text_width = pos->x;
3295   else
3296     max_text_width = SXSIZE - pos->x;
3297
3298   return max_text_width / font_width;
3299 }
3300
3301 static void DrawPreviewLevelLabelExt(int mode, struct TextPosInfo *pos)
3302 {
3303   char label_text[MAX_OUTPUT_LINESIZE + 1];
3304   int max_len_label_text;
3305   int font_nr = pos->font;
3306   int i;
3307
3308   if (!IN_GFX_FIELD_FULL(pos->x, pos->y + getFontHeight(pos->font)))
3309     return;
3310
3311   if (mode == MICROLABEL_LEVEL_AUTHOR_HEAD ||
3312       mode == MICROLABEL_IMPORTED_FROM_HEAD ||
3313       mode == MICROLABEL_IMPORTED_BY_HEAD)
3314     font_nr = pos->font_alt;
3315
3316   max_len_label_text = getMaxTextLength(pos, font_nr);
3317
3318   if (pos->size != -1)
3319     max_len_label_text = pos->size;
3320
3321   for (i = 0; i < max_len_label_text; i++)
3322     label_text[i] = ' ';
3323   label_text[max_len_label_text] = '\0';
3324
3325   if (strlen(label_text) > 0)
3326     DrawTextSAligned(pos->x, pos->y, label_text, font_nr, pos->align);
3327
3328   strncpy(label_text,
3329           (mode == MICROLABEL_LEVEL_NAME ? level.name :
3330            mode == MICROLABEL_LEVEL_AUTHOR_HEAD ? "created by" :
3331            mode == MICROLABEL_LEVEL_AUTHOR ? level.author :
3332            mode == MICROLABEL_IMPORTED_FROM_HEAD ? "imported from" :
3333            mode == MICROLABEL_IMPORTED_FROM ? leveldir_current->imported_from :
3334            mode == MICROLABEL_IMPORTED_BY_HEAD ? "imported by" :
3335            mode == MICROLABEL_IMPORTED_BY ? leveldir_current->imported_by :""),
3336           max_len_label_text);
3337   label_text[max_len_label_text] = '\0';
3338
3339   if (strlen(label_text) > 0)
3340     DrawTextSAligned(pos->x, pos->y, label_text, font_nr, pos->align);
3341
3342   redraw_mask |= REDRAW_FIELD;
3343 }
3344
3345 static void DrawPreviewLevelLabel(int mode)
3346 {
3347   DrawPreviewLevelLabelExt(mode, &menu.main.text.level_info_2);
3348 }
3349
3350 static void DrawPreviewLevelInfo(int mode)
3351 {
3352   if (mode == MICROLABEL_LEVEL_NAME)
3353     DrawPreviewLevelLabelExt(mode, &menu.main.text.level_name);
3354   else if (mode == MICROLABEL_LEVEL_AUTHOR)
3355     DrawPreviewLevelLabelExt(mode, &menu.main.text.level_author);
3356 }
3357
3358 static void DrawPreviewLevelExt(boolean restart)
3359 {
3360   static unsigned int scroll_delay = 0;
3361   static unsigned int label_delay = 0;
3362   static int from_x, from_y, scroll_direction;
3363   static int label_state, label_counter;
3364   unsigned int scroll_delay_value = preview.step_delay;
3365   boolean show_level_border = (BorderElement != EL_EMPTY);
3366   int level_xsize = lev_fieldx + (show_level_border ? 2 : 0);
3367   int level_ysize = lev_fieldy + (show_level_border ? 2 : 0);
3368
3369   if (restart)
3370   {
3371     from_x = 0;
3372     from_y = 0;
3373
3374     if (preview.anim_mode == ANIM_CENTERED)
3375     {
3376       if (level_xsize > preview.xsize)
3377         from_x = (level_xsize - preview.xsize) / 2;
3378       if (level_ysize > preview.ysize)
3379         from_y = (level_ysize - preview.ysize) / 2;
3380     }
3381
3382     from_x += preview.xoffset;
3383     from_y += preview.yoffset;
3384
3385     scroll_direction = MV_RIGHT;
3386     label_state = 1;
3387     label_counter = 0;
3388
3389     DrawPreviewLevelPlayfield(from_x, from_y);
3390     DrawPreviewLevelLabel(label_state);
3391
3392     DrawPreviewLevelInfo(MICROLABEL_LEVEL_NAME);
3393     DrawPreviewLevelInfo(MICROLABEL_LEVEL_AUTHOR);
3394
3395     // initialize delay counters
3396     DelayReached(&scroll_delay, 0);
3397     DelayReached(&label_delay, 0);
3398
3399     if (leveldir_current->name)
3400     {
3401       struct TextPosInfo *pos = &menu.main.text.level_info_1;
3402       char label_text[MAX_OUTPUT_LINESIZE + 1];
3403       int font_nr = pos->font;
3404       int max_len_label_text = getMaxTextLength(pos, font_nr);
3405
3406       if (pos->size != -1)
3407         max_len_label_text = pos->size;
3408
3409       strncpy(label_text, leveldir_current->name, max_len_label_text);
3410       label_text[max_len_label_text] = '\0';
3411
3412       if (IN_GFX_FIELD_FULL(pos->x, pos->y + getFontHeight(pos->font)))
3413         DrawTextSAligned(pos->x, pos->y, label_text, font_nr, pos->align);
3414     }
3415
3416     return;
3417   }
3418
3419   // scroll preview level, if needed
3420   if (preview.anim_mode != ANIM_NONE &&
3421       (level_xsize > preview.xsize || level_ysize > preview.ysize) &&
3422       DelayReached(&scroll_delay, scroll_delay_value))
3423   {
3424     switch (scroll_direction)
3425     {
3426       case MV_LEFT:
3427         if (from_x > 0)
3428         {
3429           from_x -= preview.step_offset;
3430           from_x = (from_x < 0 ? 0 : from_x);
3431         }
3432         else
3433           scroll_direction = MV_UP;
3434         break;
3435
3436       case MV_RIGHT:
3437         if (from_x < level_xsize - preview.xsize)
3438         {
3439           from_x += preview.step_offset;
3440           from_x = (from_x > level_xsize - preview.xsize ?
3441                     level_xsize - preview.xsize : from_x);
3442         }
3443         else
3444           scroll_direction = MV_DOWN;
3445         break;
3446
3447       case MV_UP:
3448         if (from_y > 0)
3449         {
3450           from_y -= preview.step_offset;
3451           from_y = (from_y < 0 ? 0 : from_y);
3452         }
3453         else
3454           scroll_direction = MV_RIGHT;
3455         break;
3456
3457       case MV_DOWN:
3458         if (from_y < level_ysize - preview.ysize)
3459         {
3460           from_y += preview.step_offset;
3461           from_y = (from_y > level_ysize - preview.ysize ?
3462                     level_ysize - preview.ysize : from_y);
3463         }
3464         else
3465           scroll_direction = MV_LEFT;
3466         break;
3467
3468       default:
3469         break;
3470     }
3471
3472     DrawPreviewLevelPlayfield(from_x, from_y);
3473   }
3474
3475   // !!! THIS ALL SUCKS -- SHOULD BE CLEANLY REWRITTEN !!!
3476   // redraw micro level label, if needed
3477   if (!strEqual(level.name, NAMELESS_LEVEL_NAME) &&
3478       !strEqual(level.author, ANONYMOUS_NAME) &&
3479       !strEqual(level.author, leveldir_current->name) &&
3480       DelayReached(&label_delay, MICROLEVEL_LABEL_DELAY))
3481   {
3482     int max_label_counter = 23;
3483
3484     if (leveldir_current->imported_from != NULL &&
3485         strlen(leveldir_current->imported_from) > 0)
3486       max_label_counter += 14;
3487     if (leveldir_current->imported_by != NULL &&
3488         strlen(leveldir_current->imported_by) > 0)
3489       max_label_counter += 14;
3490
3491     label_counter = (label_counter + 1) % max_label_counter;
3492     label_state = (label_counter >= 0 && label_counter <= 7 ?
3493                    MICROLABEL_LEVEL_NAME :
3494                    label_counter >= 9 && label_counter <= 12 ?
3495                    MICROLABEL_LEVEL_AUTHOR_HEAD :
3496                    label_counter >= 14 && label_counter <= 21 ?
3497                    MICROLABEL_LEVEL_AUTHOR :
3498                    label_counter >= 23 && label_counter <= 26 ?
3499                    MICROLABEL_IMPORTED_FROM_HEAD :
3500                    label_counter >= 28 && label_counter <= 35 ?
3501                    MICROLABEL_IMPORTED_FROM :
3502                    label_counter >= 37 && label_counter <= 40 ?
3503                    MICROLABEL_IMPORTED_BY_HEAD :
3504                    label_counter >= 42 && label_counter <= 49 ?
3505                    MICROLABEL_IMPORTED_BY : MICROLABEL_EMPTY);
3506
3507     if (leveldir_current->imported_from == NULL &&
3508         (label_state == MICROLABEL_IMPORTED_FROM_HEAD ||
3509          label_state == MICROLABEL_IMPORTED_FROM))
3510       label_state = (label_state == MICROLABEL_IMPORTED_FROM_HEAD ?
3511                      MICROLABEL_IMPORTED_BY_HEAD : MICROLABEL_IMPORTED_BY);
3512
3513     DrawPreviewLevelLabel(label_state);
3514   }
3515 }
3516
3517 void DrawPreviewPlayers(void)
3518 {
3519   if (game_status != GAME_MODE_MAIN)
3520     return;
3521
3522   // do not draw preview players if level preview redefined, but players aren't
3523   if (preview.redefined && !menu.main.preview_players.redefined)
3524     return;
3525
3526   boolean player_found[MAX_PLAYERS];
3527   int num_players = 0;
3528   int i, x, y;
3529
3530   for (i = 0; i < MAX_PLAYERS; i++)
3531     player_found[i] = FALSE;
3532
3533   // check which players can be found in the level (simple approach)
3534   for (x = 0; x < lev_fieldx; x++)
3535   {
3536     for (y = 0; y < lev_fieldy; y++)
3537     {
3538       int element = level.field[x][y];
3539
3540       if (ELEM_IS_PLAYER(element))
3541       {
3542         int player_nr = GET_PLAYER_NR(element);
3543
3544         player_nr = MIN(MAX(0, player_nr), MAX_PLAYERS - 1);
3545
3546         if (!player_found[player_nr])
3547           num_players++;
3548
3549         player_found[player_nr] = TRUE;
3550       }
3551     }
3552   }
3553
3554   struct TextPosInfo *pos = &menu.main.preview_players;
3555   int tile_size = pos->tile_size;
3556   int border_size = pos->border_size;
3557   int player_xoffset_raw = (pos->vertical ? 0 : tile_size + border_size);
3558   int player_yoffset_raw = (pos->vertical ? tile_size + border_size : 0);
3559   int player_xoffset = (pos->xoffset != -1 ? pos->xoffset : player_xoffset_raw);
3560   int player_yoffset = (pos->yoffset != -1 ? pos->yoffset : player_yoffset_raw);
3561   int max_players_width  = (MAX_PLAYERS - 1) * player_xoffset + tile_size;
3562   int max_players_height = (MAX_PLAYERS - 1) * player_yoffset + tile_size;
3563   int all_players_width  = (num_players - 1) * player_xoffset + tile_size;
3564   int all_players_height = (num_players - 1) * player_yoffset + tile_size;
3565   int max_xpos = SX + ALIGNED_XPOS(pos->x, max_players_width,  pos->align);
3566   int max_ypos = SY + ALIGNED_YPOS(pos->y, max_players_height, pos->valign);
3567   int xpos = SX + ALIGNED_XPOS(pos->x, all_players_width,  pos->align);
3568   int ypos = SY + ALIGNED_YPOS(pos->y, all_players_height, pos->valign);
3569
3570   // clear area in which the players will be drawn
3571   ClearRectangleOnBackground(drawto, max_xpos, max_ypos,
3572                              max_players_width, max_players_height);
3573
3574   if (!network.enabled && !setup.team_mode)
3575     return;
3576
3577   // only draw players if level is suited for team mode
3578   if (num_players < 2)
3579     return;
3580
3581   // draw all players that were found in the level
3582   for (i = 0; i < MAX_PLAYERS; i++)
3583   {
3584     if (player_found[i])
3585     {
3586       int graphic = el2img(EL_PLAYER_1 + i);
3587
3588       DrawSizedGraphicThruMaskExt(drawto, xpos, ypos, graphic, 0, tile_size);
3589
3590       xpos += player_xoffset;
3591       ypos += player_yoffset;
3592     }
3593   }
3594 }
3595
3596 void DrawPreviewLevelInitial(void)
3597 {
3598   DrawPreviewLevelExt(TRUE);
3599   DrawPreviewPlayers();
3600 }
3601
3602 void DrawPreviewLevelAnimation(void)
3603 {
3604   DrawPreviewLevelExt(FALSE);
3605 }
3606
3607 static void DrawNetworkPlayer(int x, int y, int player_nr, int tile_size,
3608                               int border_size, int font_nr)
3609 {
3610   int graphic = el2img(EL_PLAYER_1 + player_nr);
3611   int font_height = getFontHeight(font_nr);
3612   int player_height = MAX(tile_size, font_height);
3613   int xoffset_text = tile_size + border_size;
3614   int yoffset_text    = (player_height - font_height) / 2;
3615   int yoffset_graphic = (player_height - tile_size) / 2;
3616   char *player_name = getNetworkPlayerName(player_nr + 1);
3617
3618   DrawSizedGraphicThruMaskExt(drawto, x, y + yoffset_graphic, graphic, 0,
3619                               tile_size);
3620   DrawText(x + xoffset_text, y + yoffset_text, player_name, font_nr);
3621 }
3622
3623 static void DrawNetworkPlayersExt(boolean force)
3624 {
3625   if (game_status != GAME_MODE_MAIN)
3626     return;
3627
3628   if (!network.connected && !force)
3629     return;
3630
3631   // do not draw network players if level preview redefined, but players aren't
3632   if (preview.redefined && !menu.main.network_players.redefined)
3633     return;
3634
3635   int num_players = 0;
3636   int i;
3637
3638   for (i = 0; i < MAX_PLAYERS; i++)
3639     if (stored_player[i].connected_network)
3640       num_players++;
3641
3642   struct TextPosInfo *pos = &menu.main.network_players;
3643   int tile_size = pos->tile_size;
3644   int border_size = pos->border_size;
3645   int xoffset_text = tile_size + border_size;
3646   int font_nr = pos->font;
3647   int font_width = getFontWidth(font_nr);
3648   int font_height = getFontHeight(font_nr);
3649   int player_height = MAX(tile_size, font_height);
3650   int player_yoffset = player_height + border_size;
3651   int max_players_width = xoffset_text + MAX_PLAYER_NAME_LEN * font_width;
3652   int max_players_height = MAX_PLAYERS * player_yoffset - border_size;
3653   int all_players_height = num_players * player_yoffset - border_size;
3654   int max_xpos = SX + ALIGNED_XPOS(pos->x, max_players_width,  pos->align);
3655   int max_ypos = SY + ALIGNED_YPOS(pos->y, max_players_height, pos->valign);
3656   int ypos = SY + ALIGNED_YPOS(pos->y, all_players_height, pos->valign);
3657
3658   ClearRectangleOnBackground(drawto, max_xpos, max_ypos,
3659                              max_players_width, max_players_height);
3660
3661   // first draw local network player ...
3662   for (i = 0; i < MAX_PLAYERS; i++)
3663   {
3664     if (stored_player[i].connected_network &&
3665         stored_player[i].connected_locally)
3666     {
3667       char *player_name = getNetworkPlayerName(i + 1);
3668       int player_width = xoffset_text + getTextWidth(player_name, font_nr);
3669       int xpos = SX + ALIGNED_XPOS(pos->x, player_width,  pos->align);
3670
3671       DrawNetworkPlayer(xpos, ypos, i, tile_size, border_size, font_nr);
3672
3673       ypos += player_yoffset;
3674     }
3675   }
3676
3677   // ... then draw all other network players
3678   for (i = 0; i < MAX_PLAYERS; i++)
3679   {
3680     if (stored_player[i].connected_network &&
3681         !stored_player[i].connected_locally)
3682     {
3683       char *player_name = getNetworkPlayerName(i + 1);
3684       int player_width = xoffset_text + getTextWidth(player_name, font_nr);
3685       int xpos = SX + ALIGNED_XPOS(pos->x, player_width,  pos->align);
3686
3687       DrawNetworkPlayer(xpos, ypos, i, tile_size, border_size, font_nr);
3688
3689       ypos += player_yoffset;
3690     }
3691   }
3692 }
3693
3694 void DrawNetworkPlayers(void)
3695 {
3696   DrawNetworkPlayersExt(FALSE);
3697 }
3698
3699 void ClearNetworkPlayers(void)
3700 {
3701   DrawNetworkPlayersExt(TRUE);
3702 }
3703
3704 static void DrawGraphicAnimationExt(DrawBuffer *dst_bitmap, int x, int y,
3705                                     int graphic, int sync_frame,
3706                                     int mask_mode)
3707 {
3708   int frame = getGraphicAnimationFrame(graphic, sync_frame);
3709
3710   if (mask_mode == USE_MASKING)
3711     DrawGraphicThruMaskExt(dst_bitmap, x, y, graphic, frame);
3712   else
3713     DrawGraphicExt(dst_bitmap, x, y, graphic, frame);
3714 }
3715
3716 void DrawFixedGraphicAnimationExt(DrawBuffer *dst_bitmap, int x, int y,
3717                                   int graphic, int sync_frame, int mask_mode)
3718 {
3719   int frame = getGraphicAnimationFrame(graphic, sync_frame);
3720
3721   if (mask_mode == USE_MASKING)
3722     DrawFixedGraphicThruMaskExt(dst_bitmap, x, y, graphic, frame);
3723   else
3724     DrawFixedGraphicExt(dst_bitmap, x, y, graphic, frame);
3725 }
3726
3727 static void DrawGraphicAnimation(int x, int y, int graphic)
3728 {
3729   int lx = LEVELX(x), ly = LEVELY(y);
3730
3731   if (!IN_SCR_FIELD(x, y))
3732     return;
3733
3734   DrawGraphicAnimationExt(drawto_field, FX + x * TILEX_VAR, FY + y * TILEY_VAR,
3735                           graphic, GfxFrame[lx][ly], NO_MASKING);
3736
3737   MarkTileDirty(x, y);
3738 }
3739
3740 void DrawFixedGraphicAnimation(int x, int y, int graphic)
3741 {
3742   int lx = LEVELX(x), ly = LEVELY(y);
3743
3744   if (!IN_SCR_FIELD(x, y))
3745     return;
3746
3747   DrawGraphicAnimationExt(drawto_field, FX + x * TILEX, FY + y * TILEY,
3748                           graphic, GfxFrame[lx][ly], NO_MASKING);
3749   MarkTileDirty(x, y);
3750 }
3751
3752 void DrawLevelGraphicAnimation(int x, int y, int graphic)
3753 {
3754   DrawGraphicAnimation(SCREENX(x), SCREENY(y), graphic);
3755 }
3756
3757 void DrawLevelElementAnimation(int x, int y, int element)
3758 {
3759   int graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
3760
3761   DrawGraphicAnimation(SCREENX(x), SCREENY(y), graphic);
3762 }
3763
3764 void DrawLevelGraphicAnimationIfNeeded(int x, int y, int graphic)
3765 {
3766   int sx = SCREENX(x), sy = SCREENY(y);
3767
3768   if (!IN_LEV_FIELD(x, y) || !IN_SCR_FIELD(sx, sy))
3769     return;
3770
3771   if (!IS_NEW_FRAME(GfxFrame[x][y], graphic))
3772     return;
3773
3774   DrawGraphicAnimation(sx, sy, graphic);
3775
3776 #if 1
3777   if (GFX_CRUMBLED(TILE_GFX_ELEMENT(x, y)))
3778     DrawLevelFieldCrumbled(x, y);
3779 #else
3780   if (GFX_CRUMBLED(Tile[x][y]))
3781     DrawLevelFieldCrumbled(x, y);
3782 #endif
3783 }
3784
3785 void DrawLevelElementAnimationIfNeeded(int x, int y, int element)
3786 {
3787   int sx = SCREENX(x), sy = SCREENY(y);
3788   int graphic;
3789
3790   if (!IN_LEV_FIELD(x, y) || !IN_SCR_FIELD(sx, sy))
3791     return;
3792
3793   graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
3794
3795   if (!IS_NEW_FRAME(GfxFrame[x][y], graphic))
3796     return;
3797
3798   DrawGraphicAnimation(sx, sy, graphic);
3799
3800   if (GFX_CRUMBLED(element))
3801     DrawLevelFieldCrumbled(x, y);
3802 }
3803
3804 static int getPlayerGraphic(struct PlayerInfo *player, int move_dir)
3805 {
3806   if (player->use_murphy)
3807   {
3808     // this works only because currently only one player can be "murphy" ...
3809     static int last_horizontal_dir = MV_LEFT;
3810     int graphic = el_act_dir2img(EL_SP_MURPHY, player->GfxAction, move_dir);
3811
3812     if (move_dir == MV_LEFT || move_dir == MV_RIGHT)
3813       last_horizontal_dir = move_dir;
3814
3815     if (graphic == IMG_SP_MURPHY)       // undefined => use special graphic
3816     {
3817       int direction = (player->is_snapping ? move_dir : last_horizontal_dir);
3818
3819       graphic = el_act_dir2img(EL_SP_MURPHY, player->GfxAction, direction);
3820     }
3821
3822     return graphic;
3823   }
3824   else
3825     return el_act_dir2img(player->artwork_element, player->GfxAction,move_dir);
3826 }
3827
3828 static boolean equalGraphics(int graphic1, int graphic2)
3829 {
3830   struct GraphicInfo *g1 = &graphic_info[graphic1];
3831   struct GraphicInfo *g2 = &graphic_info[graphic2];
3832
3833   return (g1->bitmap      == g2->bitmap &&
3834           g1->src_x       == g2->src_x &&
3835           g1->src_y       == g2->src_y &&
3836           g1->anim_frames == g2->anim_frames &&
3837           g1->anim_delay  == g2->anim_delay &&
3838           g1->anim_mode   == g2->anim_mode);
3839 }
3840
3841 #define DRAW_PLAYER_OVER_PUSHED_ELEMENT 1
3842
3843 enum
3844 {
3845   DRAW_PLAYER_STAGE_INIT = 0,
3846   DRAW_PLAYER_STAGE_LAST_FIELD,
3847   DRAW_PLAYER_STAGE_FIELD_UNDER_PLAYER,
3848 #if DRAW_PLAYER_OVER_PUSHED_ELEMENT
3849   DRAW_PLAYER_STAGE_ELEMENT_PUSHED,
3850   DRAW_PLAYER_STAGE_PLAYER,
3851 #else
3852   DRAW_PLAYER_STAGE_PLAYER,
3853   DRAW_PLAYER_STAGE_ELEMENT_PUSHED,
3854 #endif
3855   DRAW_PLAYER_STAGE_ELEMENT_OVER_PLAYER,
3856   DRAW_PLAYER_STAGE_FIELD_OVER_PLAYER,
3857
3858   NUM_DRAW_PLAYER_STAGES
3859 };
3860
3861 static void DrawPlayerExt(struct PlayerInfo *player, int drawing_stage)
3862 {
3863   static int static_last_player_graphic[MAX_PLAYERS];
3864   static int static_last_player_frame[MAX_PLAYERS];
3865   static boolean static_player_is_opaque[MAX_PLAYERS];
3866   static boolean draw_player[MAX_PLAYERS];
3867   int pnr = player->index_nr;
3868
3869   if (drawing_stage == DRAW_PLAYER_STAGE_INIT)
3870   {
3871     static_last_player_graphic[pnr] = getPlayerGraphic(player, player->MovDir);
3872     static_last_player_frame[pnr] = player->Frame;
3873     static_player_is_opaque[pnr] = FALSE;
3874
3875     draw_player[pnr] = TRUE;
3876   }
3877
3878   if (!draw_player[pnr])
3879     return;
3880
3881 #if DEBUG
3882   if (!IN_LEV_FIELD(player->jx, player->jy))
3883   {
3884     Debug("draw:DrawPlayerExt", "x = %d, y = %d", player->jx, player->jy);
3885     Debug("draw:DrawPlayerExt", "This should never happen!");
3886
3887     draw_player[pnr] = FALSE;
3888
3889     return;
3890   }
3891 #endif
3892
3893   int last_player_graphic  = static_last_player_graphic[pnr];
3894   int last_player_frame    = static_last_player_frame[pnr];
3895   boolean player_is_opaque = static_player_is_opaque[pnr];
3896
3897   int jx = player->jx;
3898   int jy = player->jy;
3899   int move_dir = (player->is_waiting ? player->dir_waiting : player->MovDir);
3900   int dx = (move_dir == MV_LEFT ? -1 : move_dir == MV_RIGHT ? +1 : 0);
3901   int dy = (move_dir == MV_UP   ? -1 : move_dir == MV_DOWN  ? +1 : 0);
3902   int last_jx = (player->is_moving ? jx - dx : jx);
3903   int last_jy = (player->is_moving ? jy - dy : jy);
3904   int next_jx = jx + dx;
3905   int next_jy = jy + dy;
3906   boolean player_is_moving = (player->MovPos != 0 ? TRUE : FALSE);
3907   int sx = SCREENX(jx);
3908   int sy = SCREENY(jy);
3909   int sxx = (move_dir == MV_LEFT || move_dir == MV_RIGHT ? player->GfxPos : 0);
3910   int syy = (move_dir == MV_UP   || move_dir == MV_DOWN  ? player->GfxPos : 0);
3911   int element = Tile[jx][jy];
3912   int last_element = Tile[last_jx][last_jy];
3913   int action = (player->is_pushing    ? ACTION_PUSHING         :
3914                 player->is_digging    ? ACTION_DIGGING         :
3915                 player->is_collecting ? ACTION_COLLECTING      :
3916                 player->is_moving     ? ACTION_MOVING          :
3917                 player->is_snapping   ? ACTION_SNAPPING        :
3918                 player->is_dropping   ? ACTION_DROPPING        :
3919                 player->is_waiting    ? player->action_waiting :
3920                 ACTION_DEFAULT);
3921
3922   if (drawing_stage == DRAW_PLAYER_STAGE_INIT)
3923   {
3924     // ------------------------------------------------------------------------
3925     // initialize drawing the player
3926     // ------------------------------------------------------------------------
3927
3928     draw_player[pnr] = FALSE;
3929
3930     // GfxElement[][] is set to the element the player is digging or collecting;
3931     // remove also for off-screen player if the player is not moving anymore
3932     if (IN_LEV_FIELD(jx, jy) && !player_is_moving)
3933       GfxElement[jx][jy] = EL_UNDEFINED;
3934
3935     if (!player->active || !IN_SCR_FIELD(SCREENX(last_jx), SCREENY(last_jy)))
3936       return;
3937
3938     if (element == EL_EXPLOSION)
3939       return;
3940
3941     InitPlayerGfxAnimation(player, action, move_dir);
3942
3943     draw_player[pnr] = TRUE;
3944   }
3945   else if (drawing_stage == DRAW_PLAYER_STAGE_LAST_FIELD)
3946   {
3947     // ------------------------------------------------------------------------
3948     // draw things in the field the player is leaving, if needed
3949     // ------------------------------------------------------------------------
3950
3951     if (!IN_SCR_FIELD(sx, sy))
3952       draw_player[pnr] = FALSE;
3953
3954     if (!player->is_moving)
3955       return;
3956
3957     if (Back[last_jx][last_jy] && IS_DRAWABLE(last_element))
3958     {
3959       DrawLevelElement(last_jx, last_jy, Back[last_jx][last_jy]);
3960
3961       if (last_element == EL_DYNAMITE_ACTIVE ||
3962           last_element == EL_EM_DYNAMITE_ACTIVE ||
3963           last_element == EL_SP_DISK_RED_ACTIVE)
3964         DrawDynamite(last_jx, last_jy);
3965       else
3966         DrawLevelFieldThruMask(last_jx, last_jy);
3967     }
3968     else if (last_element == EL_DYNAMITE_ACTIVE ||
3969              last_element == EL_EM_DYNAMITE_ACTIVE ||
3970              last_element == EL_SP_DISK_RED_ACTIVE)
3971       DrawDynamite(last_jx, last_jy);
3972     else
3973       DrawLevelField(last_jx, last_jy);
3974
3975     if (player->is_pushing && IN_SCR_FIELD(SCREENX(next_jx), SCREENY(next_jy)))
3976       DrawLevelElement(next_jx, next_jy, EL_EMPTY);
3977   }
3978   else if (drawing_stage == DRAW_PLAYER_STAGE_FIELD_UNDER_PLAYER)
3979   {
3980     // ------------------------------------------------------------------------
3981     // draw things behind the player, if needed
3982     // ------------------------------------------------------------------------
3983
3984     if (Back[jx][jy])
3985     {
3986       DrawLevelElement(jx, jy, Back[jx][jy]);
3987
3988       return;
3989     }
3990
3991     if (IS_ACTIVE_BOMB(element))
3992     {
3993       DrawLevelElement(jx, jy, EL_EMPTY);
3994
3995       return;
3996     }
3997
3998     if (player_is_moving && GfxElement[jx][jy] != EL_UNDEFINED)
3999     {
4000       int old_element = GfxElement[jx][jy];
4001       int old_graphic = el_act_dir2img(old_element, action, move_dir);
4002       int frame = getGraphicAnimationFrame(old_graphic, player->StepFrame);
4003
4004       if (GFX_CRUMBLED(old_element))
4005         DrawLevelFieldCrumbledDigging(jx, jy, move_dir, player->StepFrame);
4006       else
4007         DrawGraphic(sx, sy, old_graphic, frame);
4008
4009       if (graphic_info[old_graphic].anim_mode & ANIM_OPAQUE_PLAYER)
4010         static_player_is_opaque[pnr] = TRUE;
4011     }
4012     else
4013     {
4014       GfxElement[jx][jy] = EL_UNDEFINED;
4015
4016       // make sure that pushed elements are drawn with correct frame rate
4017       int graphic = el_act_dir2img(element, ACTION_PUSHING, move_dir);
4018
4019       if (player->is_pushing && player->is_moving && !IS_ANIM_MODE_CE(graphic))
4020         GfxFrame[jx][jy] = player->StepFrame;
4021
4022       DrawLevelField(jx, jy);
4023     }
4024   }
4025   else if (drawing_stage == DRAW_PLAYER_STAGE_ELEMENT_PUSHED)
4026   {
4027     // ------------------------------------------------------------------------
4028     // draw things the player is pushing, if needed
4029     // ------------------------------------------------------------------------
4030
4031     if (!player->is_pushing || !player->is_moving)
4032       return;
4033
4034     int gfx_frame = GfxFrame[jx][jy];
4035
4036     if (!IS_MOVING(jx, jy))             // push movement already finished
4037     {
4038       element = Tile[next_jx][next_jy];
4039       gfx_frame = GfxFrame[next_jx][next_jy];
4040     }
4041
4042     int graphic = el_act_dir2img(element, ACTION_PUSHING, move_dir);
4043     int sync_frame = (IS_ANIM_MODE_CE(graphic) ? gfx_frame : player->StepFrame);
4044     int frame = getGraphicAnimationFrame(graphic, sync_frame);
4045
4046     // draw background element under pushed element (like the Sokoban field)
4047     if (game.use_masked_pushing && IS_MOVING(jx, jy))
4048     {
4049       // this allows transparent pushing animation over non-black background
4050
4051       if (Back[jx][jy])
4052         DrawLevelElement(jx, jy, Back[jx][jy]);
4053       else
4054         DrawLevelElement(jx, jy, EL_EMPTY);
4055
4056       if (Back[next_jx][next_jy])
4057         DrawLevelElement(next_jx, next_jy, Back[next_jx][next_jy]);
4058       else
4059         DrawLevelElement(next_jx, next_jy, EL_EMPTY);
4060     }
4061     else if (Back[next_jx][next_jy])
4062       DrawLevelElement(next_jx, next_jy, Back[next_jx][next_jy]);
4063
4064     int px = SCREENX(jx), py = SCREENY(jy);
4065     int pxx = (TILEX - ABS(sxx)) * dx;
4066     int pyy = (TILEY - ABS(syy)) * dy;
4067
4068 #if 1
4069     // do not draw (EM style) pushing animation when pushing is finished
4070     // (two-tile animations usually do not contain start and end frame)
4071     if (graphic_info[graphic].double_movement && !IS_MOVING(jx, jy))
4072       DrawLevelElement(next_jx, next_jy, Tile[next_jx][next_jy]);
4073     else
4074       DrawGraphicShiftedThruMask(px, py, pxx, pyy, graphic, frame, NO_CUTTING);
4075 #else
4076     // masked drawing is needed for EMC style (double) movement graphics
4077     // !!! (ONLY WHEN DRAWING PUSHED ELEMENT OVER THE PLAYER) !!!
4078     DrawGraphicShiftedThruMask(px, py, pxx, pyy, graphic, frame, NO_CUTTING);
4079 #endif
4080   }
4081   else if (drawing_stage == DRAW_PLAYER_STAGE_PLAYER)
4082   {
4083     // ------------------------------------------------------------------------
4084     // draw player himself
4085     // ------------------------------------------------------------------------
4086
4087     int graphic = getPlayerGraphic(player, move_dir);
4088
4089     // in the case of changed player action or direction, prevent the current
4090     // animation frame from being restarted for identical animations
4091     if (player->Frame == 0 && equalGraphics(graphic, last_player_graphic))
4092       player->Frame = last_player_frame;
4093
4094     int frame = getGraphicAnimationFrame(graphic, player->Frame);
4095
4096     if (player_is_opaque)
4097       DrawGraphicShifted(sx,sy, sxx,syy, graphic, frame, NO_CUTTING,NO_MASKING);
4098     else
4099       DrawGraphicShiftedThruMask(sx, sy, sxx, syy, graphic, frame, NO_CUTTING);
4100
4101     if (SHIELD_ON(player))
4102     {
4103       graphic = (player->shield_deadly_time_left ? IMG_SHIELD_DEADLY_ACTIVE :
4104                  IMG_SHIELD_NORMAL_ACTIVE);
4105       frame = getGraphicAnimationFrame(graphic, -1);
4106
4107       DrawGraphicShiftedThruMask(sx, sy, sxx, syy, graphic, frame, NO_CUTTING);
4108     }
4109   }
4110   else if (drawing_stage == DRAW_PLAYER_STAGE_ELEMENT_OVER_PLAYER)
4111   {
4112     // ------------------------------------------------------------------------
4113     // draw things in front of player (active dynamite or dynabombs)
4114     // ------------------------------------------------------------------------
4115
4116     if (IS_ACTIVE_BOMB(element))
4117     {
4118       int graphic = el2img(element);
4119       int frame = getGraphicAnimationFrame(graphic, GfxFrame[jx][jy]);
4120
4121       if (game.emulation == EMU_SUPAPLEX)
4122         DrawGraphic(sx, sy, IMG_SP_DISK_RED, frame);
4123       else
4124         DrawGraphicThruMask(sx, sy, graphic, frame);
4125     }
4126
4127     if (player_is_moving && last_element == EL_EXPLOSION)
4128     {
4129       int element = (GfxElement[last_jx][last_jy] != EL_UNDEFINED ?
4130                      GfxElement[last_jx][last_jy] :  EL_EMPTY);
4131       int graphic = el_act2img(element, ACTION_EXPLODING);
4132       int delay = (game.emulation == EMU_SUPAPLEX ? 3 : 2);
4133       int phase = ExplodePhase[last_jx][last_jy] - 1;
4134       int frame = getGraphicAnimationFrame(graphic, phase - delay);
4135
4136       if (phase >= delay)
4137         DrawGraphicThruMask(SCREENX(last_jx), SCREENY(last_jy), graphic, frame);
4138     }
4139   }
4140   else if (drawing_stage == DRAW_PLAYER_STAGE_FIELD_OVER_PLAYER)
4141   {
4142     // ------------------------------------------------------------------------
4143     // draw elements the player is just walking/passing through/under
4144     // ------------------------------------------------------------------------
4145
4146     if (player_is_moving)
4147     {
4148       // handle the field the player is leaving ...
4149       if (IS_ACCESSIBLE_INSIDE(last_element))
4150         DrawLevelField(last_jx, last_jy);
4151       else if (IS_ACCESSIBLE_UNDER(last_element))
4152         DrawLevelFieldThruMask(last_jx, last_jy);
4153     }
4154
4155     // do not redraw accessible elements if the player is just pushing them
4156     if (!player_is_moving || !player->is_pushing)
4157     {
4158       // ... and the field the player is entering
4159       if (IS_ACCESSIBLE_INSIDE(element))
4160         DrawLevelField(jx, jy);
4161       else if (IS_ACCESSIBLE_UNDER(element))
4162         DrawLevelFieldThruMask(jx, jy);
4163     }
4164
4165     MarkTileDirty(sx, sy);
4166   }
4167 }
4168
4169 void DrawPlayer(struct PlayerInfo *player)
4170 {
4171   int i;
4172
4173   for (i = 0; i < NUM_DRAW_PLAYER_STAGES; i++)
4174     DrawPlayerExt(player, i);
4175 }
4176
4177 void DrawAllPlayers(void)
4178 {
4179   int i, j;
4180
4181   for (i = 0; i < NUM_DRAW_PLAYER_STAGES; i++)
4182     for (j = 0; j < MAX_PLAYERS; j++)
4183       if (stored_player[j].active)
4184         DrawPlayerExt(&stored_player[j], i);
4185 }
4186
4187 void DrawPlayerField(int x, int y)
4188 {
4189   if (!IS_PLAYER(x, y))
4190     return;
4191
4192   DrawPlayer(PLAYERINFO(x, y));
4193 }
4194
4195 // ----------------------------------------------------------------------------
4196
4197 void WaitForEventToContinue(void)
4198 {
4199   boolean still_wait = TRUE;
4200
4201   if (program.headless)
4202     return;
4203
4204   // simulate releasing mouse button over last gadget, if still pressed
4205   if (button_status)
4206     HandleGadgets(-1, -1, 0);
4207
4208   button_status = MB_RELEASED;
4209
4210   ClearEventQueue();
4211
4212   while (still_wait)
4213   {
4214     Event event;
4215
4216     if (NextValidEvent(&event))
4217     {
4218       switch (event.type)
4219       {
4220         case EVENT_BUTTONRELEASE:
4221         case EVENT_KEYPRESS:
4222         case SDL_CONTROLLERBUTTONDOWN:
4223         case SDL_JOYBUTTONDOWN:
4224           still_wait = FALSE;
4225           break;
4226
4227         case EVENT_KEYRELEASE:
4228           ClearPlayerAction();
4229           break;
4230
4231         default:
4232           HandleOtherEvents(&event);
4233           break;
4234       }
4235     }
4236     else if (AnyJoystickButton() == JOY_BUTTON_NEW_PRESSED)
4237     {
4238       still_wait = FALSE;
4239     }
4240
4241     BackToFront();
4242   }
4243 }
4244
4245 #define MAX_REQUEST_LINES               13
4246 #define MAX_REQUEST_LINE_FONT1_LEN      7
4247 #define MAX_REQUEST_LINE_FONT2_LEN      10
4248
4249 static int RequestHandleEvents(unsigned int req_state)
4250 {
4251   boolean game_just_ended = (game_status == GAME_MODE_PLAYING &&
4252                              checkGameEnded());
4253   int width  = request.width;
4254   int height = request.height;
4255   int sx, sy;
4256   int result;
4257
4258   // when showing request dialog after game ended, deactivate game panel
4259   if (game_just_ended)
4260     game.panel.active = FALSE;
4261
4262   game.request_active = TRUE;
4263
4264   setRequestPosition(&sx, &sy, FALSE);
4265
4266   button_status = MB_RELEASED;
4267
4268   request_gadget_id = -1;
4269   result = -1;
4270
4271   while (result < 0)
4272   {
4273     if (game_just_ended)
4274     {
4275       // the MM game engine does not use a special (scrollable) field buffer
4276       if (level.game_engine_type != GAME_ENGINE_TYPE_MM)
4277         SetDrawtoField(DRAW_TO_FIELDBUFFER);
4278
4279       HandleGameActions();
4280
4281       SetDrawtoField(DRAW_TO_BACKBUFFER);
4282
4283       if (global.use_envelope_request)
4284       {
4285         // copy current state of request area to middle of playfield area
4286         BlitBitmap(bitmap_db_store_2, drawto, sx, sy, width, height, sx, sy);
4287       }
4288     }
4289
4290     if (PendingEvent())
4291     {
4292       Event event;
4293
4294       while (NextValidEvent(&event))
4295       {
4296         switch (event.type)
4297         {
4298           case EVENT_BUTTONPRESS:
4299           case EVENT_BUTTONRELEASE:
4300           case EVENT_MOTIONNOTIFY:
4301           {
4302             int mx, my;
4303
4304             if (event.type == EVENT_MOTIONNOTIFY)
4305             {
4306               if (!button_status)
4307                 continue;
4308
4309               motion_status = TRUE;
4310               mx = ((MotionEvent *) &event)->x;
4311               my = ((MotionEvent *) &event)->y;
4312             }
4313             else
4314             {
4315               motion_status = FALSE;
4316               mx = ((ButtonEvent *) &event)->x;
4317               my = ((ButtonEvent *) &event)->y;
4318               if (event.type == EVENT_BUTTONPRESS)
4319                 button_status = ((ButtonEvent *) &event)->button;
4320               else
4321                 button_status = MB_RELEASED;
4322             }
4323
4324             // this sets 'request_gadget_id'
4325             HandleGadgets(mx, my, button_status);
4326
4327             switch (request_gadget_id)
4328             {
4329               case TOOL_CTRL_ID_YES:
4330               case TOOL_CTRL_ID_TOUCH_YES:
4331                 result = TRUE;
4332                 break;
4333               case TOOL_CTRL_ID_NO:
4334               case TOOL_CTRL_ID_TOUCH_NO:
4335                 result = FALSE;
4336                 break;
4337               case TOOL_CTRL_ID_CONFIRM:
4338               case TOOL_CTRL_ID_TOUCH_CONFIRM:
4339                 result = TRUE | FALSE;
4340                 break;
4341
4342               case TOOL_CTRL_ID_PLAYER_1:
4343                 result = 1;
4344                 break;
4345               case TOOL_CTRL_ID_PLAYER_2:
4346                 result = 2;
4347                 break;
4348               case TOOL_CTRL_ID_PLAYER_3:
4349                 result = 3;
4350                 break;
4351               case TOOL_CTRL_ID_PLAYER_4:
4352                 result = 4;
4353                 break;
4354
4355               default:
4356                 // only check clickable animations if no request gadget clicked
4357                 HandleGlobalAnimClicks(mx, my, button_status, FALSE);
4358                 break;
4359             }
4360
4361             break;
4362           }
4363
4364           case SDL_WINDOWEVENT:
4365             HandleWindowEvent((WindowEvent *) &event);
4366             break;
4367
4368           case SDL_APP_WILLENTERBACKGROUND:
4369           case SDL_APP_DIDENTERBACKGROUND:
4370           case SDL_APP_WILLENTERFOREGROUND:
4371           case SDL_APP_DIDENTERFOREGROUND:
4372             HandlePauseResumeEvent((PauseResumeEvent *) &event);
4373             break;
4374
4375           case EVENT_KEYPRESS:
4376           {
4377             Key key = GetEventKey((KeyEvent *)&event, TRUE);
4378
4379             switch (key)
4380             {
4381               case KSYM_space:
4382                 if (req_state & REQ_CONFIRM)
4383                   result = 1;
4384                 break;
4385
4386               case KSYM_Return:
4387               case KSYM_y:
4388               case KSYM_Y:
4389               case KSYM_Select:
4390               case KSYM_Menu:
4391 #if defined(KSYM_Rewind)
4392               case KSYM_Rewind:         // for Amazon Fire TV remote
4393 #endif
4394                 result = 1;
4395                 break;
4396
4397               case KSYM_Escape:
4398               case KSYM_n:
4399               case KSYM_N:
4400               case KSYM_Back:
4401 #if defined(KSYM_FastForward)
4402               case KSYM_FastForward:    // for Amazon Fire TV remote
4403 #endif
4404                 result = 0;
4405                 break;
4406
4407               default:
4408                 HandleKeysDebug(key, KEY_PRESSED);
4409                 break;
4410             }
4411
4412             if (req_state & REQ_PLAYER)
4413             {
4414               int old_player_nr = setup.network_player_nr;
4415
4416               if (result != -1)
4417                 result = old_player_nr + 1;
4418
4419               switch (key)
4420               {
4421                 case KSYM_space:
4422                   result = old_player_nr + 1;
4423                   break;
4424
4425                 case KSYM_Up:
4426                 case KSYM_1:
4427                   result = 1;
4428                   break;
4429
4430                 case KSYM_Right:
4431                 case KSYM_2:
4432                   result = 2;
4433                   break;
4434
4435                 case KSYM_Down:
4436                 case KSYM_3:
4437                   result = 3;
4438                   break;
4439
4440                 case KSYM_Left:
4441                 case KSYM_4:
4442                   result = 4;
4443                   break;
4444
4445                 default:
4446                   break;
4447               }
4448             }
4449
4450             break;
4451           }
4452
4453           case EVENT_FINGERRELEASE:
4454           case EVENT_KEYRELEASE:
4455             ClearPlayerAction();
4456             break;
4457
4458           case SDL_CONTROLLERBUTTONDOWN:
4459             switch (event.cbutton.button)
4460             {
4461               case SDL_CONTROLLER_BUTTON_A:
4462               case SDL_CONTROLLER_BUTTON_X:
4463               case SDL_CONTROLLER_BUTTON_LEFTSHOULDER:
4464               case SDL_CONTROLLER_BUTTON_LEFTSTICK:
4465                 result = 1;
4466                 break;
4467
4468               case SDL_CONTROLLER_BUTTON_B:
4469               case SDL_CONTROLLER_BUTTON_Y:
4470               case SDL_CONTROLLER_BUTTON_RIGHTSHOULDER:
4471               case SDL_CONTROLLER_BUTTON_RIGHTSTICK:
4472               case SDL_CONTROLLER_BUTTON_BACK:
4473                 result = 0;
4474                 break;
4475             }
4476
4477             if (req_state & REQ_PLAYER)
4478             {
4479               int old_player_nr = setup.network_player_nr;
4480
4481               if (result != -1)
4482                 result = old_player_nr + 1;
4483
4484               switch (event.cbutton.button)
4485               {
4486                 case SDL_CONTROLLER_BUTTON_DPAD_UP:
4487                 case SDL_CONTROLLER_BUTTON_Y:
4488                   result = 1;
4489                   break;
4490
4491                 case SDL_CONTROLLER_BUTTON_DPAD_RIGHT:
4492                 case SDL_CONTROLLER_BUTTON_B:
4493                   result = 2;
4494                   break;
4495
4496                 case SDL_CONTROLLER_BUTTON_DPAD_DOWN:
4497                 case SDL_CONTROLLER_BUTTON_A:
4498                   result = 3;
4499                   break;
4500
4501                 case SDL_CONTROLLER_BUTTON_DPAD_LEFT:
4502                 case SDL_CONTROLLER_BUTTON_X:
4503                   result = 4;
4504                   break;
4505
4506                 default:
4507                   break;
4508               }
4509             }
4510
4511             break;
4512
4513           case SDL_CONTROLLERBUTTONUP:
4514             HandleJoystickEvent(&event);
4515             ClearPlayerAction();
4516             break;
4517
4518           default:
4519             HandleOtherEvents(&event);
4520             break;
4521         }
4522       }
4523     }
4524     else if (AnyJoystickButton() == JOY_BUTTON_NEW_PRESSED)
4525     {
4526       int joy = AnyJoystick();
4527
4528       if (joy & JOY_BUTTON_1)
4529         result = 1;
4530       else if (joy & JOY_BUTTON_2)
4531         result = 0;
4532     }
4533     else if (AnyJoystick())
4534     {
4535       int joy = AnyJoystick();
4536
4537       if (req_state & REQ_PLAYER)
4538       {
4539         if (joy & JOY_UP)
4540           result = 1;
4541         else if (joy & JOY_RIGHT)
4542           result = 2;
4543         else if (joy & JOY_DOWN)
4544           result = 3;
4545         else if (joy & JOY_LEFT)
4546           result = 4;
4547       }
4548     }
4549
4550     if (game_just_ended)
4551     {
4552       if (global.use_envelope_request)
4553       {
4554         // copy back current state of pressed buttons inside request area
4555         BlitBitmap(drawto, bitmap_db_store_2, sx, sy, width, height, sx, sy);
4556       }
4557     }
4558
4559     BackToFront();
4560   }
4561
4562   game.request_active = FALSE;
4563
4564   return result;
4565 }
4566
4567 static boolean RequestDoor(char *text, unsigned int req_state)
4568 {
4569   unsigned int old_door_state;
4570   int max_request_line_len = MAX_REQUEST_LINE_FONT1_LEN;
4571   int font_nr = FONT_TEXT_2;
4572   char *text_ptr;
4573   int result;
4574   int ty;
4575
4576   if (maxWordLengthInRequestString(text) > MAX_REQUEST_LINE_FONT1_LEN)
4577   {
4578     max_request_line_len = MAX_REQUEST_LINE_FONT2_LEN;
4579     font_nr = FONT_TEXT_1;
4580   }
4581
4582   if (game_status == GAME_MODE_PLAYING)
4583     BlitScreenToBitmap(backbuffer);
4584
4585   // disable deactivated drawing when quick-loading level tape recording
4586   if (tape.playing && tape.deactivate_display)
4587     TapeDeactivateDisplayOff(TRUE);
4588
4589   SetMouseCursor(CURSOR_DEFAULT);
4590
4591   // pause network game while waiting for request to answer
4592   if (network.enabled &&
4593       game_status == GAME_MODE_PLAYING &&
4594       !game.all_players_gone &&
4595       req_state & REQUEST_WAIT_FOR_INPUT)
4596     SendToServer_PausePlaying();
4597
4598   old_door_state = GetDoorState();
4599
4600   // simulate releasing mouse button over last gadget, if still pressed
4601   if (button_status)
4602     HandleGadgets(-1, -1, 0);
4603
4604   UnmapAllGadgets();
4605
4606   // draw released gadget before proceeding
4607   // BackToFront();
4608
4609   if (old_door_state & DOOR_OPEN_1)
4610   {
4611     CloseDoor(DOOR_CLOSE_1);
4612
4613     // save old door content
4614     BlitBitmap(bitmap_db_door_1, bitmap_db_door_1,
4615                0 * DXSIZE, 0, DXSIZE, DYSIZE, 1 * DXSIZE, 0);
4616   }
4617
4618   SetDoorBackgroundImage(IMG_BACKGROUND_DOOR);
4619   SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
4620
4621   // clear door drawing field
4622   DrawBackground(DX, DY, DXSIZE, DYSIZE);
4623
4624   // force DOOR font inside door area
4625   SetFontStatus(GAME_MODE_PSEUDO_DOOR);
4626
4627   // write text for request
4628   for (text_ptr = text, ty = 0; ty < MAX_REQUEST_LINES; ty++)
4629   {
4630     char text_line[max_request_line_len + 1];
4631     int tx, tl, tc = 0;
4632
4633     if (!*text_ptr)
4634       break;
4635
4636     for (tl = 0, tx = 0; tx < max_request_line_len; tl++, tx++)
4637     {
4638       tc = *(text_ptr + tx);
4639       // if (!tc || tc == ' ')
4640       if (!tc || tc == ' ' || tc == '?' || tc == '!')
4641         break;
4642     }
4643
4644     if ((tc == '?' || tc == '!') && tl == 0)
4645       tl = 1;
4646
4647     if (!tl)
4648     {
4649       text_ptr++;
4650       ty--;
4651       continue;
4652     }
4653
4654     strncpy(text_line, text_ptr, tl);
4655     text_line[tl] = 0;
4656
4657     DrawText(DX + (DXSIZE - tl * getFontWidth(font_nr)) / 2,
4658              DY + 8 + ty * (getFontHeight(font_nr) + 2),
4659              text_line, font_nr);
4660
4661     text_ptr += tl + (tc == ' ' ? 1 : 0);
4662     // text_ptr += tl + (tc == ' ' || tc == '?' || tc == '!' ? 1 : 0);
4663   }
4664
4665   ResetFontStatus();
4666
4667   if (req_state & REQ_ASK)
4668   {
4669     MapGadget(tool_gadget[TOOL_CTRL_ID_YES]);
4670     MapGadget(tool_gadget[TOOL_CTRL_ID_NO]);
4671     MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_YES]);
4672     MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_NO]);
4673   }
4674   else if (req_state & REQ_CONFIRM)
4675   {
4676     MapGadget(tool_gadget[TOOL_CTRL_ID_CONFIRM]);
4677     MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_CONFIRM]);
4678   }
4679   else if (req_state & REQ_PLAYER)
4680   {
4681     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_1]);
4682     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_2]);
4683     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_3]);
4684     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_4]);
4685   }
4686
4687   // copy request gadgets to door backbuffer
4688   BlitBitmap(drawto, bitmap_db_door_1, DX, DY, DXSIZE, DYSIZE, 0, 0);
4689
4690   OpenDoor(DOOR_OPEN_1);
4691
4692   if (!(req_state & REQUEST_WAIT_FOR_INPUT))
4693   {
4694     if (game_status == GAME_MODE_PLAYING)
4695     {
4696       SetPanelBackground();
4697       SetDrawBackgroundMask(REDRAW_DOOR_1);
4698     }
4699     else
4700     {
4701       SetDrawBackgroundMask(REDRAW_FIELD);
4702     }
4703
4704     return FALSE;
4705   }
4706
4707   SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
4708
4709   // ---------- handle request buttons ----------
4710   result = RequestHandleEvents(req_state);
4711
4712   UnmapToolButtons();
4713
4714   if (!(req_state & REQ_STAY_OPEN))
4715   {
4716     CloseDoor(DOOR_CLOSE_1);
4717
4718     if (((old_door_state & DOOR_OPEN_1) && !(req_state & REQ_STAY_CLOSED)) ||
4719         (req_state & REQ_REOPEN))
4720       OpenDoor(DOOR_OPEN_1 | DOOR_COPY_BACK);
4721   }
4722
4723   RemapAllGadgets();
4724
4725   if (game_status == GAME_MODE_PLAYING)
4726   {
4727     SetPanelBackground();
4728     SetDrawBackgroundMask(REDRAW_DOOR_1);
4729   }
4730   else
4731   {
4732     SetDrawBackgroundMask(REDRAW_FIELD);
4733   }
4734
4735   // continue network game after request
4736   if (network.enabled &&
4737       game_status == GAME_MODE_PLAYING &&
4738       !game.all_players_gone &&
4739       req_state & REQUEST_WAIT_FOR_INPUT)
4740     SendToServer_ContinuePlaying();
4741
4742   // restore deactivated drawing when quick-loading level tape recording
4743   if (tape.playing && tape.deactivate_display)
4744     TapeDeactivateDisplayOn();
4745
4746   return result;
4747 }
4748
4749 static boolean RequestEnvelope(char *text, unsigned int req_state)
4750 {
4751   int result;
4752
4753   if (game_status == GAME_MODE_PLAYING)
4754     BlitScreenToBitmap(backbuffer);
4755
4756   // disable deactivated drawing when quick-loading level tape recording
4757   if (tape.playing && tape.deactivate_display)
4758     TapeDeactivateDisplayOff(TRUE);
4759
4760   SetMouseCursor(CURSOR_DEFAULT);
4761
4762   // pause network game while waiting for request to answer
4763   if (network.enabled &&
4764       game_status == GAME_MODE_PLAYING &&
4765       !game.all_players_gone &&
4766       req_state & REQUEST_WAIT_FOR_INPUT)
4767     SendToServer_PausePlaying();
4768
4769   // simulate releasing mouse button over last gadget, if still pressed
4770   if (button_status)
4771     HandleGadgets(-1, -1, 0);
4772
4773   UnmapAllGadgets();
4774
4775   // (replace with setting corresponding request background)
4776   // SetDoorBackgroundImage(IMG_BACKGROUND_DOOR);
4777   // SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
4778
4779   // clear door drawing field
4780   // DrawBackground(DX, DY, DXSIZE, DYSIZE);
4781
4782   ShowEnvelopeRequest(text, req_state, ACTION_OPENING);
4783
4784   if (!(req_state & REQUEST_WAIT_FOR_INPUT))
4785   {
4786     if (game_status == GAME_MODE_PLAYING)
4787     {
4788       SetPanelBackground();
4789       SetDrawBackgroundMask(REDRAW_DOOR_1);
4790     }
4791     else
4792     {
4793       SetDrawBackgroundMask(REDRAW_FIELD);
4794     }
4795
4796     return FALSE;
4797   }
4798
4799   SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
4800
4801   // ---------- handle request buttons ----------
4802   result = RequestHandleEvents(req_state);
4803
4804   UnmapToolButtons();
4805
4806   ShowEnvelopeRequest(text, req_state, ACTION_CLOSING);
4807
4808   RemapAllGadgets();
4809
4810   if (game_status == GAME_MODE_PLAYING)
4811   {
4812     SetPanelBackground();
4813     SetDrawBackgroundMask(REDRAW_DOOR_1);
4814   }
4815   else
4816   {
4817     SetDrawBackgroundMask(REDRAW_FIELD);
4818   }
4819
4820   // continue network game after request
4821   if (network.enabled &&
4822       game_status == GAME_MODE_PLAYING &&
4823       !game.all_players_gone &&
4824       req_state & REQUEST_WAIT_FOR_INPUT)
4825     SendToServer_ContinuePlaying();
4826
4827   // restore deactivated drawing when quick-loading level tape recording
4828   if (tape.playing && tape.deactivate_display)
4829     TapeDeactivateDisplayOn();
4830
4831   return result;
4832 }
4833
4834 boolean Request(char *text, unsigned int req_state)
4835 {
4836   boolean overlay_enabled = GetOverlayEnabled();
4837   boolean result;
4838
4839   SetOverlayEnabled(FALSE);
4840
4841   if (global.use_envelope_request)
4842     result = RequestEnvelope(text, req_state);
4843   else
4844     result = RequestDoor(text, req_state);
4845
4846   SetOverlayEnabled(overlay_enabled);
4847
4848   return result;
4849 }
4850
4851 static int compareDoorPartOrderInfo(const void *object1, const void *object2)
4852 {
4853   const struct DoorPartOrderInfo *dpo1 = (struct DoorPartOrderInfo *)object1;
4854   const struct DoorPartOrderInfo *dpo2 = (struct DoorPartOrderInfo *)object2;
4855   int compare_result;
4856
4857   if (dpo1->sort_priority != dpo2->sort_priority)
4858     compare_result = dpo1->sort_priority - dpo2->sort_priority;
4859   else
4860     compare_result = dpo1->nr - dpo2->nr;
4861
4862   return compare_result;
4863 }
4864
4865 void InitGraphicCompatibilityInfo_Doors(void)
4866 {
4867   struct
4868   {
4869     int door_token;
4870     int part_1, part_8;
4871     struct DoorInfo *door;
4872   }
4873   doors[] =
4874   {
4875     { DOOR_1,   IMG_GFX_DOOR_1_PART_1,  IMG_GFX_DOOR_1_PART_8,  &door_1 },
4876     { DOOR_2,   IMG_GFX_DOOR_2_PART_1,  IMG_GFX_DOOR_2_PART_8,  &door_2 },
4877
4878     { -1,       -1,                     -1,                     NULL    }
4879   };
4880   struct Rect door_rect_list[] =
4881   {
4882     { DX, DY, DXSIZE, DYSIZE },
4883     { VX, VY, VXSIZE, VYSIZE }
4884   };
4885   int i, j;
4886
4887   for (i = 0; doors[i].door_token != -1; i++)
4888   {
4889     int door_token = doors[i].door_token;
4890     int door_index = DOOR_INDEX_FROM_TOKEN(door_token);
4891     int part_1 = doors[i].part_1;
4892     int part_8 = doors[i].part_8;
4893     int part_2 = part_1 + 1;
4894     int part_3 = part_1 + 2;
4895     struct DoorInfo *door = doors[i].door;
4896     struct Rect *door_rect = &door_rect_list[door_index];
4897     boolean door_gfx_redefined = FALSE;
4898
4899     // check if any door part graphic definitions have been redefined
4900
4901     for (j = 0; door_part_controls[j].door_token != -1; j++)
4902     {
4903       struct DoorPartControlInfo *dpc = &door_part_controls[j];
4904       struct FileInfo *fi = getImageListEntryFromImageID(dpc->graphic);
4905
4906       if (dpc->door_token == door_token && fi->redefined)
4907         door_gfx_redefined = TRUE;
4908     }
4909
4910     // check for old-style door graphic/animation modifications
4911
4912     if (!door_gfx_redefined)
4913     {
4914       if (door->anim_mode & ANIM_STATIC_PANEL)
4915       {
4916         door->panel.step_xoffset = 0;
4917         door->panel.step_yoffset = 0;
4918       }
4919
4920       if (door->anim_mode & (ANIM_HORIZONTAL | ANIM_VERTICAL))
4921       {
4922         struct GraphicInfo *g_part_1 = &graphic_info[part_1];
4923         struct GraphicInfo *g_part_2 = &graphic_info[part_2];
4924         int num_door_steps, num_panel_steps;
4925
4926         // remove door part graphics other than the two default wings
4927
4928         for (j = 0; door_part_controls[j].door_token != -1; j++)
4929         {
4930           struct DoorPartControlInfo *dpc = &door_part_controls[j];
4931           struct GraphicInfo *g = &graphic_info[dpc->graphic];
4932
4933           if (dpc->graphic >= part_3 &&
4934               dpc->graphic <= part_8)
4935             g->bitmap = NULL;
4936         }
4937
4938         // set graphics and screen positions of the default wings
4939
4940         g_part_1->width  = door_rect->width;
4941         g_part_1->height = door_rect->height;
4942         g_part_2->width  = door_rect->width;
4943         g_part_2->height = door_rect->height;
4944         g_part_2->src_x = door_rect->width;
4945         g_part_2->src_y = g_part_1->src_y;
4946
4947         door->part_2.x = door->part_1.x;
4948         door->part_2.y = door->part_1.y;
4949
4950         if (door->width != -1)
4951         {
4952           g_part_1->width = door->width;
4953           g_part_2->width = door->width;
4954
4955           // special treatment for graphics and screen position of right wing
4956           g_part_2->src_x += door_rect->width - door->width;
4957           door->part_2.x  += door_rect->width - door->width;
4958         }
4959
4960         if (door->height != -1)
4961         {
4962           g_part_1->height = door->height;
4963           g_part_2->height = door->height;
4964
4965           // special treatment for graphics and screen position of bottom wing
4966           g_part_2->src_y += door_rect->height - door->height;
4967           door->part_2.y  += door_rect->height - door->height;
4968         }
4969
4970         // set animation delays for the default wings and panels
4971
4972         door->part_1.step_delay = door->step_delay;
4973         door->part_2.step_delay = door->step_delay;
4974         door->panel.step_delay  = door->step_delay;
4975
4976         // set animation draw order for the default wings
4977
4978         door->part_1.sort_priority = 2; // draw left wing over ...
4979         door->part_2.sort_priority = 1; //          ... right wing
4980
4981         // set animation draw offset for the default wings
4982
4983         if (door->anim_mode & ANIM_HORIZONTAL)
4984         {
4985           door->part_1.step_xoffset = door->step_offset;
4986           door->part_1.step_yoffset = 0;
4987           door->part_2.step_xoffset = door->step_offset * -1;
4988           door->part_2.step_yoffset = 0;
4989
4990           num_door_steps = g_part_1->width / door->step_offset;
4991         }
4992         else    // ANIM_VERTICAL
4993         {
4994           door->part_1.step_xoffset = 0;
4995           door->part_1.step_yoffset = door->step_offset;
4996           door->part_2.step_xoffset = 0;
4997           door->part_2.step_yoffset = door->step_offset * -1;
4998
4999           num_door_steps = g_part_1->height / door->step_offset;
5000         }
5001
5002         // set animation draw offset for the default panels
5003
5004         if (door->step_offset > 1)
5005         {
5006           num_panel_steps = 2 * door_rect->height / door->step_offset;
5007           door->panel.start_step = num_panel_steps - num_door_steps;
5008           door->panel.start_step_closing = door->panel.start_step;
5009         }
5010         else
5011         {
5012           num_panel_steps = door_rect->height / door->step_offset;
5013           door->panel.start_step = num_panel_steps - num_door_steps / 2;
5014           door->panel.start_step_closing = door->panel.start_step;
5015           door->panel.step_delay *= 2;
5016         }
5017       }
5018     }
5019   }
5020 }
5021
5022 void InitDoors(void)
5023 {
5024   int i;
5025
5026   for (i = 0; door_part_controls[i].door_token != -1; i++)
5027   {
5028     struct DoorPartControlInfo *dpc = &door_part_controls[i];
5029     struct DoorPartOrderInfo *dpo = &door_part_order[i];
5030
5031     // initialize "start_step_opening" and "start_step_closing", if needed
5032     if (dpc->pos->start_step_opening == 0 &&
5033         dpc->pos->start_step_closing == 0)
5034     {
5035       // dpc->pos->start_step_opening = dpc->pos->start_step;
5036       dpc->pos->start_step_closing = dpc->pos->start_step;
5037     }
5038
5039     // fill structure for door part draw order (sorted below)
5040     dpo->nr = i;
5041     dpo->sort_priority = dpc->pos->sort_priority;
5042   }
5043
5044   // sort door part controls according to sort_priority and graphic number
5045   qsort(door_part_order, MAX_DOOR_PARTS,
5046         sizeof(struct DoorPartOrderInfo), compareDoorPartOrderInfo);
5047 }
5048
5049 unsigned int OpenDoor(unsigned int door_state)
5050 {
5051   if (door_state & DOOR_COPY_BACK)
5052   {
5053     if (door_state & DOOR_OPEN_1)
5054       BlitBitmap(bitmap_db_door_1, bitmap_db_door_1,
5055                  1 * DXSIZE, 0, DXSIZE, DYSIZE, 0 * DXSIZE, 0);
5056
5057     if (door_state & DOOR_OPEN_2)
5058       BlitBitmap(bitmap_db_door_2, bitmap_db_door_2,
5059                  1 * VXSIZE, 0, VXSIZE, VYSIZE, 0 * VXSIZE, 0);
5060
5061     door_state &= ~DOOR_COPY_BACK;
5062   }
5063
5064   return MoveDoor(door_state);
5065 }
5066
5067 unsigned int CloseDoor(unsigned int door_state)
5068 {
5069   unsigned int old_door_state = GetDoorState();
5070
5071   if (!(door_state & DOOR_NO_COPY_BACK))
5072   {
5073     if (old_door_state & DOOR_OPEN_1)
5074       BlitBitmap(backbuffer, bitmap_db_door_1,
5075                  DX, DY, DXSIZE, DYSIZE, 0, 0);
5076
5077     if (old_door_state & DOOR_OPEN_2)
5078       BlitBitmap(backbuffer, bitmap_db_door_2,
5079                  VX, VY, VXSIZE, VYSIZE, 0, 0);
5080
5081     door_state &= ~DOOR_NO_COPY_BACK;
5082   }
5083
5084   return MoveDoor(door_state);
5085 }
5086
5087 unsigned int GetDoorState(void)
5088 {
5089   return MoveDoor(DOOR_GET_STATE);
5090 }
5091
5092 unsigned int SetDoorState(unsigned int door_state)
5093 {
5094   return MoveDoor(door_state | DOOR_SET_STATE);
5095 }
5096
5097 static int euclid(int a, int b)
5098 {
5099   return (b ? euclid(b, a % b) : a);
5100 }
5101
5102 unsigned int MoveDoor(unsigned int door_state)
5103 {
5104   struct Rect door_rect_list[] =
5105   {
5106     { DX, DY, DXSIZE, DYSIZE },
5107     { VX, VY, VXSIZE, VYSIZE }
5108   };
5109   static int door1 = DOOR_CLOSE_1;
5110   static int door2 = DOOR_CLOSE_2;
5111   unsigned int door_delay = 0;
5112   unsigned int door_delay_value;
5113   int i;
5114
5115   if (door_state == DOOR_GET_STATE)
5116     return (door1 | door2);
5117
5118   if (door_state & DOOR_SET_STATE)
5119   {
5120     if (door_state & DOOR_ACTION_1)
5121       door1 = door_state & DOOR_ACTION_1;
5122     if (door_state & DOOR_ACTION_2)
5123       door2 = door_state & DOOR_ACTION_2;
5124
5125     return (door1 | door2);
5126   }
5127
5128   if (!(door_state & DOOR_FORCE_REDRAW))
5129   {
5130     if (door1 == DOOR_OPEN_1 && door_state & DOOR_OPEN_1)
5131       door_state &= ~DOOR_OPEN_1;
5132     else if (door1 == DOOR_CLOSE_1 && door_state & DOOR_CLOSE_1)
5133       door_state &= ~DOOR_CLOSE_1;
5134     if (door2 == DOOR_OPEN_2 && door_state & DOOR_OPEN_2)
5135       door_state &= ~DOOR_OPEN_2;
5136     else if (door2 == DOOR_CLOSE_2 && door_state & DOOR_CLOSE_2)
5137       door_state &= ~DOOR_CLOSE_2;
5138   }
5139
5140   if (global.autoplay_leveldir)
5141   {
5142     door_state |= DOOR_NO_DELAY;
5143     door_state &= ~DOOR_CLOSE_ALL;
5144   }
5145
5146   if (game_status == GAME_MODE_EDITOR && !(door_state & DOOR_FORCE_ANIM))
5147     door_state |= DOOR_NO_DELAY;
5148
5149   if (door_state & DOOR_ACTION)
5150   {
5151     boolean door_panel_drawn[NUM_DOORS];
5152     boolean panel_has_doors[NUM_DOORS];
5153     boolean door_part_skip[MAX_DOOR_PARTS];
5154     boolean door_part_done[MAX_DOOR_PARTS];
5155     boolean door_part_done_all;
5156     int num_steps[MAX_DOOR_PARTS];
5157     int max_move_delay = 0;     // delay for complete animations of all doors
5158     int max_step_delay = 0;     // delay (ms) between two animation frames
5159     int num_move_steps = 0;     // number of animation steps for all doors
5160     int max_move_delay_doors_only = 0;  // delay for doors only (no panel)
5161     int num_move_steps_doors_only = 0;  // steps for doors only (no panel)
5162     int current_move_delay = 0;
5163     int start = 0;
5164     int k;
5165
5166     for (i = 0; i < NUM_DOORS; i++)
5167       panel_has_doors[i] = FALSE;
5168
5169     for (i = 0; i < MAX_DOOR_PARTS; i++)
5170     {
5171       struct DoorPartControlInfo *dpc = &door_part_controls[i];
5172       struct GraphicInfo *g = &graphic_info[dpc->graphic];
5173       int door_token = dpc->door_token;
5174
5175       door_part_done[i] = FALSE;
5176       door_part_skip[i] = (!(door_state & door_token) ||
5177                            !g->bitmap);
5178     }
5179
5180     for (i = 0; i < MAX_DOOR_PARTS; i++)
5181     {
5182       int nr = door_part_order[i].nr;
5183       struct DoorPartControlInfo *dpc = &door_part_controls[nr];
5184       struct DoorPartPosInfo *pos = dpc->pos;
5185       struct GraphicInfo *g = &graphic_info[dpc->graphic];
5186       int door_token = dpc->door_token;
5187       int door_index = DOOR_INDEX_FROM_TOKEN(door_token);
5188       boolean is_panel = DOOR_PART_IS_PANEL(nr);
5189       int step_xoffset = ABS(pos->step_xoffset);
5190       int step_yoffset = ABS(pos->step_yoffset);
5191       int step_delay = pos->step_delay;
5192       int current_door_state = door_state & door_token;
5193       boolean door_opening = ((current_door_state & DOOR_OPEN)  != 0);
5194       boolean door_closing = ((current_door_state & DOOR_CLOSE) != 0);
5195       boolean part_opening = (is_panel ? door_closing : door_opening);
5196       int start_step = (part_opening ? pos->start_step_opening :
5197                         pos->start_step_closing);
5198       float move_xsize = (step_xoffset ? g->width  : 0);
5199       float move_ysize = (step_yoffset ? g->height : 0);
5200       int move_xsteps = (step_xoffset ? ceil(move_xsize / step_xoffset) : 0);
5201       int move_ysteps = (step_yoffset ? ceil(move_ysize / step_yoffset) : 0);
5202       int move_steps = (move_xsteps && move_ysteps ?
5203                         MIN(move_xsteps, move_ysteps) :
5204                         move_xsteps ? move_xsteps : move_ysteps) - start_step;
5205       int move_delay = move_steps * step_delay;
5206
5207       if (door_part_skip[nr])
5208         continue;
5209
5210       max_move_delay = MAX(max_move_delay, move_delay);
5211       max_step_delay = (max_step_delay == 0 ? step_delay :
5212                         euclid(max_step_delay, step_delay));
5213       num_steps[nr] = move_steps;
5214
5215       if (!is_panel)
5216       {
5217         max_move_delay_doors_only = MAX(max_move_delay_doors_only, move_delay);
5218
5219         panel_has_doors[door_index] = TRUE;
5220       }
5221     }
5222
5223     max_step_delay = MAX(1, max_step_delay);    // prevent division by zero
5224
5225     num_move_steps = max_move_delay / max_step_delay;
5226     num_move_steps_doors_only = max_move_delay_doors_only / max_step_delay;
5227
5228     door_delay_value = max_step_delay;
5229
5230     if ((door_state & DOOR_NO_DELAY) || setup.quick_doors)
5231     {
5232       start = num_move_steps - 1;
5233     }
5234     else
5235     {
5236       // opening door sound has priority over simultaneously closing door
5237       if (door_state & (DOOR_OPEN_1 | DOOR_OPEN_2))
5238       {
5239         PlayMenuSoundStereo(SND_DOOR_OPENING, SOUND_MIDDLE);
5240
5241         if (door_state & DOOR_OPEN_1)
5242           PlayMenuSoundStereo(SND_DOOR_1_OPENING, SOUND_MIDDLE);
5243         if (door_state & DOOR_OPEN_2)
5244           PlayMenuSoundStereo(SND_DOOR_2_OPENING, SOUND_MIDDLE);
5245       }
5246       else if (door_state & (DOOR_CLOSE_1 | DOOR_CLOSE_2))
5247       {
5248         PlayMenuSoundStereo(SND_DOOR_CLOSING, SOUND_MIDDLE);
5249
5250         if (door_state & DOOR_CLOSE_1)
5251           PlayMenuSoundStereo(SND_DOOR_1_CLOSING, SOUND_MIDDLE);
5252         if (door_state & DOOR_CLOSE_2)
5253           PlayMenuSoundStereo(SND_DOOR_2_CLOSING, SOUND_MIDDLE);
5254       }
5255     }
5256
5257     for (k = start; k < num_move_steps; k++)
5258     {
5259       int last_frame = num_move_steps - 1;      // last frame of this "for" loop
5260
5261       door_part_done_all = TRUE;
5262
5263       for (i = 0; i < NUM_DOORS; i++)
5264         door_panel_drawn[i] = FALSE;
5265
5266       for (i = 0; i < MAX_DOOR_PARTS; i++)
5267       {
5268         int nr = door_part_order[i].nr;
5269         struct DoorPartControlInfo *dpc = &door_part_controls[nr];
5270         struct DoorPartPosInfo *pos = dpc->pos;
5271         struct GraphicInfo *g = &graphic_info[dpc->graphic];
5272         int door_token = dpc->door_token;
5273         int door_index = DOOR_INDEX_FROM_TOKEN(door_token);
5274         boolean is_panel = DOOR_PART_IS_PANEL(nr);
5275         boolean is_panel_and_door_has_closed = FALSE;
5276         struct Rect *door_rect = &door_rect_list[door_index];
5277         Bitmap *bitmap_db_door = (door_token == DOOR_1 ? bitmap_db_door_1 :
5278                                   bitmap_db_door_2);
5279         Bitmap *bitmap = (is_panel ? bitmap_db_door : g->bitmap);
5280         int current_door_state = door_state & door_token;
5281         boolean door_opening = ((current_door_state & DOOR_OPEN)  != 0);
5282         boolean door_closing = !door_opening;
5283         boolean part_opening = (is_panel ? door_closing : door_opening);
5284         boolean part_closing = !part_opening;
5285         int start_step = (part_opening ? pos->start_step_opening :
5286                           pos->start_step_closing);
5287         int step_delay = pos->step_delay;
5288         int step_factor = step_delay / max_step_delay;
5289         int k1 = (step_factor ? k / step_factor + 1 : k);
5290         int k2 = (part_opening ? k1 + start_step : num_steps[nr] - k1);
5291         int kk = MAX(0, k2);
5292         int g_src_x = 0;
5293         int g_src_y = 0;
5294         int src_x, src_y, src_xx, src_yy;
5295         int dst_x, dst_y, dst_xx, dst_yy;
5296         int width, height;
5297
5298         if (door_part_skip[nr])
5299           continue;
5300
5301         if (!(door_state & door_token))
5302           continue;
5303
5304         if (!g->bitmap)
5305           continue;
5306
5307         if (!is_panel)
5308         {
5309           int k2_door = (door_opening ? k : num_move_steps_doors_only - k - 1);
5310           int kk_door = MAX(0, k2_door);
5311           int sync_frame = kk_door * door_delay_value;
5312           int frame = getGraphicAnimationFrame(dpc->graphic, sync_frame);
5313
5314           getFixedGraphicSource(dpc->graphic, frame, &bitmap,
5315                                 &g_src_x, &g_src_y);
5316         }
5317
5318         // draw door panel
5319
5320         if (!door_panel_drawn[door_index])
5321         {
5322           ClearRectangle(drawto, door_rect->x, door_rect->y,
5323                          door_rect->width, door_rect->height);
5324
5325           door_panel_drawn[door_index] = TRUE;
5326         }
5327
5328         // draw opening or closing door parts
5329
5330         if (pos->step_xoffset < 0)      // door part on right side
5331         {
5332           src_xx = 0;
5333           dst_xx = pos->x + ABS(kk * pos->step_xoffset);
5334           width = g->width;
5335
5336           if (dst_xx + width > door_rect->width)
5337             width = door_rect->width - dst_xx;
5338         }
5339         else                            // door part on left side
5340         {
5341           src_xx = 0;
5342           dst_xx = pos->x - kk * pos->step_xoffset;
5343
5344           if (dst_xx < 0)
5345           {
5346             src_xx = ABS(dst_xx);
5347             dst_xx = 0;
5348           }
5349
5350           width = g->width - src_xx;
5351
5352           if (width > door_rect->width)
5353             width = door_rect->width;
5354
5355           // Debug("tools:MoveDoor", "k == %d [%d]", k, start_step);
5356         }
5357
5358         if (pos->step_yoffset < 0)      // door part on bottom side
5359         {
5360           src_yy = 0;
5361           dst_yy = pos->y + ABS(kk * pos->step_yoffset);
5362           height = g->height;
5363
5364           if (dst_yy + height > door_rect->height)
5365             height = door_rect->height - dst_yy;
5366         }
5367         else                            // door part on top side
5368         {
5369           src_yy = 0;
5370           dst_yy = pos->y - kk * pos->step_yoffset;
5371
5372           if (dst_yy < 0)
5373           {
5374             src_yy = ABS(dst_yy);
5375             dst_yy = 0;
5376           }
5377
5378           height = g->height - src_yy;
5379         }
5380
5381         src_x = g_src_x + src_xx;
5382         src_y = g_src_y + src_yy;
5383
5384         dst_x = door_rect->x + dst_xx;
5385         dst_y = door_rect->y + dst_yy;
5386
5387         is_panel_and_door_has_closed =
5388           (is_panel &&
5389            door_closing &&
5390            panel_has_doors[door_index] &&
5391            k >= num_move_steps_doors_only - 1);
5392
5393         if (width  >= 0 && width  <= g->width &&
5394             height >= 0 && height <= g->height &&
5395             !is_panel_and_door_has_closed)
5396         {
5397           if (is_panel || !pos->draw_masked)
5398             BlitBitmap(bitmap, drawto, src_x, src_y, width, height,
5399                        dst_x, dst_y);
5400           else
5401             BlitBitmapMasked(bitmap, drawto, src_x, src_y, width, height,
5402                              dst_x, dst_y);
5403         }
5404
5405         redraw_mask |= REDRAW_DOOR_FROM_TOKEN(door_token);
5406
5407         if ((part_opening && (width < 0         || height < 0)) ||
5408             (part_closing && (width >= g->width && height >= g->height)))
5409           door_part_done[nr] = TRUE;
5410
5411         // continue door part animations, but not panel after door has closed
5412         if (!door_part_done[nr] && !is_panel_and_door_has_closed)
5413           door_part_done_all = FALSE;
5414       }
5415
5416       if (!(door_state & DOOR_NO_DELAY))
5417       {
5418         BackToFront();
5419
5420         SkipUntilDelayReached(&door_delay, door_delay_value, &k, last_frame);
5421
5422         current_move_delay += max_step_delay;
5423
5424         // prevent OS (Windows) from complaining about program not responding
5425         CheckQuitEvent();
5426       }
5427
5428       if (door_part_done_all)
5429         break;
5430     }
5431
5432     if (!(door_state & DOOR_NO_DELAY))
5433     {
5434       // wait for specified door action post delay
5435       if (door_state & DOOR_ACTION_1 && door_state & DOOR_ACTION_2)
5436         door_delay_value = MAX(door_1.post_delay, door_2.post_delay);
5437       else if (door_state & DOOR_ACTION_1)
5438         door_delay_value = door_1.post_delay;
5439       else if (door_state & DOOR_ACTION_2)
5440         door_delay_value = door_2.post_delay;
5441
5442       while (!DelayReached(&door_delay, door_delay_value))
5443         BackToFront();
5444     }
5445   }
5446
5447   if (door_state & DOOR_ACTION_1)
5448     door1 = door_state & DOOR_ACTION_1;
5449   if (door_state & DOOR_ACTION_2)
5450     door2 = door_state & DOOR_ACTION_2;
5451
5452   // draw masked border over door area
5453   DrawMaskedBorder(REDRAW_DOOR_1);
5454   DrawMaskedBorder(REDRAW_DOOR_2);
5455
5456   ClearAutoRepeatKeyEvents();
5457
5458   return (door1 | door2);
5459 }
5460
5461 static boolean useSpecialEditorDoor(void)
5462 {
5463   int graphic = IMG_GLOBAL_BORDER_EDITOR;
5464   boolean redefined = getImageListEntryFromImageID(graphic)->redefined;
5465
5466   // do not draw special editor door if editor border defined or redefined
5467   if (graphic_info[graphic].bitmap != NULL || redefined)
5468     return FALSE;
5469
5470   // do not draw special editor door if global border defined to be empty
5471   if (graphic_info[IMG_GLOBAL_BORDER].bitmap == NULL)
5472     return FALSE;
5473
5474   // do not draw special editor door if viewport definitions do not match
5475   if (EX != VX ||
5476       EY >= VY ||
5477       EXSIZE != VXSIZE ||
5478       EY + EYSIZE != VY + VYSIZE)
5479     return FALSE;
5480
5481   return TRUE;
5482 }
5483
5484 void DrawSpecialEditorDoor(void)
5485 {
5486   struct GraphicInfo *gfx1 = &graphic_info[IMG_DOOR_2_TOP_BORDER_CORRECTION];
5487   int top_border_width = gfx1->width;
5488   int top_border_height = gfx1->height;
5489   int outer_border = viewport.door_2[GAME_MODE_EDITOR].border_size;
5490   int ex = EX - outer_border;
5491   int ey = EY - outer_border;
5492   int vy = VY - outer_border;
5493   int exsize = EXSIZE + 2 * outer_border;
5494
5495   if (!useSpecialEditorDoor())
5496     return;
5497
5498   // draw bigger level editor toolbox window
5499   BlitBitmap(gfx1->bitmap, drawto, gfx1->src_x, gfx1->src_y,
5500              top_border_width, top_border_height, ex, ey - top_border_height);
5501   BlitBitmap(graphic_info[IMG_GLOBAL_BORDER].bitmap, drawto, ex, vy,
5502              exsize, EYSIZE - VYSIZE + outer_border, ex, ey);
5503
5504   redraw_mask |= REDRAW_ALL;
5505 }
5506
5507 void UndrawSpecialEditorDoor(void)
5508 {
5509   struct GraphicInfo *gfx1 = &graphic_info[IMG_DOOR_2_TOP_BORDER_CORRECTION];
5510   int top_border_width = gfx1->width;
5511   int top_border_height = gfx1->height;
5512   int outer_border = viewport.door_2[GAME_MODE_EDITOR].border_size;
5513   int ex = EX - outer_border;
5514   int ey = EY - outer_border;
5515   int ey_top = ey - top_border_height;
5516   int exsize = EXSIZE + 2 * outer_border;
5517   int eysize = EYSIZE + 2 * outer_border;
5518
5519   if (!useSpecialEditorDoor())
5520     return;
5521
5522   // draw normal tape recorder window
5523   if (graphic_info[IMG_GLOBAL_BORDER].bitmap)
5524   {
5525     BlitBitmap(graphic_info[IMG_GLOBAL_BORDER].bitmap, drawto,
5526                ex, ey_top, top_border_width, top_border_height,
5527                ex, ey_top);
5528     BlitBitmap(graphic_info[IMG_GLOBAL_BORDER].bitmap, drawto,
5529                ex, ey, exsize, eysize, ex, ey);
5530   }
5531   else
5532   {
5533     // if screen background is set to "[NONE]", clear editor toolbox window
5534     ClearRectangle(drawto, ex, ey_top, top_border_width, top_border_height);
5535     ClearRectangle(drawto, ex, ey, exsize, eysize);
5536   }
5537
5538   redraw_mask |= REDRAW_ALL;
5539 }
5540
5541
5542 // ---------- new tool button stuff -------------------------------------------
5543
5544 static struct
5545 {
5546   int graphic;
5547   struct TextPosInfo *pos;
5548   int gadget_id;
5549   boolean is_touch_button;
5550   char *infotext;
5551 } toolbutton_info[NUM_TOOL_BUTTONS] =
5552 {
5553   {
5554     IMG_GFX_REQUEST_BUTTON_YES,         &request.button.yes,
5555     TOOL_CTRL_ID_YES, FALSE,            "yes"
5556   },
5557   {
5558     IMG_GFX_REQUEST_BUTTON_NO,          &request.button.no,
5559     TOOL_CTRL_ID_NO, FALSE,             "no"
5560   },
5561   {
5562     IMG_GFX_REQUEST_BUTTON_CONFIRM,     &request.button.confirm,
5563     TOOL_CTRL_ID_CONFIRM, FALSE,        "confirm"
5564   },
5565   {
5566     IMG_GFX_REQUEST_BUTTON_PLAYER_1,    &request.button.player_1,
5567     TOOL_CTRL_ID_PLAYER_1, FALSE,       "player 1"
5568   },
5569   {
5570     IMG_GFX_REQUEST_BUTTON_PLAYER_2,    &request.button.player_2,
5571     TOOL_CTRL_ID_PLAYER_2, FALSE,       "player 2"
5572   },
5573   {
5574     IMG_GFX_REQUEST_BUTTON_PLAYER_3,    &request.button.player_3,
5575     TOOL_CTRL_ID_PLAYER_3, FALSE,       "player 3"
5576   },
5577   {
5578     IMG_GFX_REQUEST_BUTTON_PLAYER_4,    &request.button.player_4,
5579     TOOL_CTRL_ID_PLAYER_4, FALSE,       "player 4"
5580   },
5581   {
5582     IMG_GFX_REQUEST_BUTTON_TOUCH_YES,   &request.button.touch_yes,
5583     TOOL_CTRL_ID_TOUCH_YES, TRUE,       "yes"
5584   },
5585   {
5586     IMG_GFX_REQUEST_BUTTON_TOUCH_NO,    &request.button.touch_no,
5587     TOOL_CTRL_ID_TOUCH_NO, TRUE,        "no"
5588   },
5589   {
5590     IMG_GFX_REQUEST_BUTTON_TOUCH_CONFIRM, &request.button.touch_confirm,
5591     TOOL_CTRL_ID_TOUCH_CONFIRM, TRUE,   "confirm"
5592   }
5593 };
5594
5595 void CreateToolButtons(void)
5596 {
5597   int i;
5598
5599   for (i = 0; i < NUM_TOOL_BUTTONS; i++)
5600   {
5601     int graphic = toolbutton_info[i].graphic;
5602     struct GraphicInfo *gfx = &graphic_info[graphic];
5603     struct TextPosInfo *pos = toolbutton_info[i].pos;
5604     struct GadgetInfo *gi;
5605     Bitmap *deco_bitmap = None;
5606     int deco_x = 0, deco_y = 0, deco_xpos = 0, deco_ypos = 0;
5607     unsigned int event_mask = GD_EVENT_RELEASED;
5608     boolean is_touch_button = toolbutton_info[i].is_touch_button;
5609     int base_x = (is_touch_button ? 0 : DX);
5610     int base_y = (is_touch_button ? 0 : DY);
5611     int gd_x = gfx->src_x;
5612     int gd_y = gfx->src_y;
5613     int gd_xp = gfx->src_x + gfx->pressed_xoffset;
5614     int gd_yp = gfx->src_y + gfx->pressed_yoffset;
5615     int x = pos->x;
5616     int y = pos->y;
5617     int id = i;
5618
5619     if (global.use_envelope_request && !is_touch_button)
5620     {
5621       setRequestPosition(&base_x, &base_y, TRUE);
5622
5623       // check if request buttons are outside of envelope and fix, if needed
5624       if (x < 0 || x + gfx->width  > request.width ||
5625           y < 0 || y + gfx->height > request.height)
5626       {
5627         if (id == TOOL_CTRL_ID_YES)
5628         {
5629           x = 0;
5630           y = request.height - 2 * request.border_size - gfx->height;
5631         }
5632         else if (id == TOOL_CTRL_ID_NO)
5633         {
5634           x = request.width  - 2 * request.border_size - gfx->width;
5635           y = request.height - 2 * request.border_size - gfx->height;
5636         }
5637         else if (id == TOOL_CTRL_ID_CONFIRM)
5638         {
5639           x = (request.width - 2 * request.border_size - gfx->width) / 2;
5640           y = request.height - 2 * request.border_size - gfx->height;
5641         }
5642         else if (id >= TOOL_CTRL_ID_PLAYER_1 && id <= TOOL_CTRL_ID_PLAYER_4)
5643         {
5644           int player_nr = id - TOOL_CTRL_ID_PLAYER_1;
5645
5646           x = (request.width - 2 * request.border_size - gfx->width) / 2;
5647           y = request.height - 2 * request.border_size - gfx->height * 2;
5648
5649           x += (player_nr == 3 ? -1 : player_nr == 1 ? +1 : 0) * gfx->width;
5650           y += (player_nr == 0 ? -1 : player_nr == 2 ? +1 : 0) * gfx->height;
5651         }
5652       }
5653     }
5654
5655     if (id >= TOOL_CTRL_ID_PLAYER_1 && id <= TOOL_CTRL_ID_PLAYER_4)
5656     {
5657       int player_nr = id - TOOL_CTRL_ID_PLAYER_1;
5658
5659       getSizedGraphicSource(PLAYER_NR_GFX(IMG_PLAYER_1, player_nr), 0,
5660                             pos->size, &deco_bitmap, &deco_x, &deco_y);
5661       deco_xpos = (gfx->width  - pos->size) / 2;
5662       deco_ypos = (gfx->height - pos->size) / 2;
5663     }
5664
5665     gi = CreateGadget(GDI_CUSTOM_ID, id,
5666                       GDI_IMAGE_ID, graphic,
5667                       GDI_INFO_TEXT, toolbutton_info[i].infotext,
5668                       GDI_X, base_x + x,
5669                       GDI_Y, base_y + y,
5670                       GDI_WIDTH, gfx->width,
5671                       GDI_HEIGHT, gfx->height,
5672                       GDI_TYPE, GD_TYPE_NORMAL_BUTTON,
5673                       GDI_STATE, GD_BUTTON_UNPRESSED,
5674                       GDI_DESIGN_UNPRESSED, gfx->bitmap, gd_x, gd_y,
5675                       GDI_DESIGN_PRESSED, gfx->bitmap, gd_xp, gd_yp,
5676                       GDI_DECORATION_DESIGN, deco_bitmap, deco_x, deco_y,
5677                       GDI_DECORATION_POSITION, deco_xpos, deco_ypos,
5678                       GDI_DECORATION_SIZE, pos->size, pos->size,
5679                       GDI_DECORATION_SHIFTING, 1, 1,
5680                       GDI_DIRECT_DRAW, FALSE,
5681                       GDI_OVERLAY_TOUCH_BUTTON, is_touch_button,
5682                       GDI_EVENT_MASK, event_mask,
5683                       GDI_CALLBACK_ACTION, HandleToolButtons,
5684                       GDI_END);
5685
5686     if (gi == NULL)
5687       Fail("cannot create gadget");
5688
5689     tool_gadget[id] = gi;
5690   }
5691 }
5692
5693 void FreeToolButtons(void)
5694 {
5695   int i;
5696
5697   for (i = 0; i < NUM_TOOL_BUTTONS; i++)
5698     FreeGadget(tool_gadget[i]);
5699 }
5700
5701 static void UnmapToolButtons(void)
5702 {
5703   int i;
5704
5705   for (i = 0; i < NUM_TOOL_BUTTONS; i++)
5706     UnmapGadget(tool_gadget[i]);
5707 }
5708
5709 static void HandleToolButtons(struct GadgetInfo *gi)
5710 {
5711   request_gadget_id = gi->custom_id;
5712 }
5713
5714 static struct Mapping_EM_to_RND_object
5715 {
5716   int element_em;
5717   boolean is_rnd_to_em_mapping;         // unique mapping EM <-> RND
5718   boolean is_backside;                  // backside of moving element
5719
5720   int element_rnd;
5721   int action;
5722   int direction;
5723 }
5724 em_object_mapping_list[GAME_TILE_MAX + 1] =
5725 {
5726   {
5727     Zborder,                            FALSE,  FALSE,
5728     EL_EMPTY,                           -1, -1
5729   },
5730   {
5731     Zplayer,                            FALSE,  FALSE,
5732     EL_EMPTY,                           -1, -1
5733   },
5734
5735   {
5736     Zbug,                               FALSE,  FALSE,
5737     EL_EMPTY,                           -1, -1
5738   },
5739   {
5740     Ztank,                              FALSE,  FALSE,
5741     EL_EMPTY,                           -1, -1
5742   },
5743   {
5744     Zeater,                             FALSE,  FALSE,
5745     EL_EMPTY,                           -1, -1
5746   },
5747   {
5748     Zdynamite,                          FALSE,  FALSE,
5749     EL_EMPTY,                           -1, -1
5750   },
5751   {
5752     Zboom,                              FALSE,  FALSE,
5753     EL_EMPTY,                           -1, -1
5754   },
5755
5756   {
5757     Xchain,                             FALSE,  FALSE,
5758     EL_DEFAULT,                         ACTION_EXPLODING, -1
5759   },
5760   {
5761     Xboom_bug,                          FALSE,  FALSE,
5762     EL_BUG,                             ACTION_EXPLODING, -1
5763   },
5764   {
5765     Xboom_tank,                         FALSE,  FALSE,
5766     EL_SPACESHIP,                       ACTION_EXPLODING, -1
5767   },
5768   {
5769     Xboom_android,                      FALSE,  FALSE,
5770     EL_EMC_ANDROID,                     ACTION_OTHER, -1
5771   },
5772   {
5773     Xboom_1,                            FALSE,  FALSE,
5774     EL_DEFAULT,                         ACTION_EXPLODING, -1
5775   },
5776   {
5777     Xboom_2,                            FALSE,  FALSE,
5778     EL_DEFAULT,                         ACTION_EXPLODING, -1
5779   },
5780
5781   {
5782     Xblank,                             TRUE,   FALSE,
5783     EL_EMPTY,                           -1, -1
5784   },
5785
5786   {
5787     Xsplash_e,                          FALSE,  FALSE,
5788     EL_ACID_SPLASH_RIGHT,               -1, -1
5789   },
5790   {
5791     Xsplash_w,                          FALSE,  FALSE,
5792     EL_ACID_SPLASH_LEFT,                -1, -1
5793   },
5794
5795   {
5796     Xplant,                             TRUE,   FALSE,
5797     EL_EMC_PLANT,                       -1, -1
5798   },
5799   {
5800     Yplant,                             FALSE,  FALSE,
5801     EL_EMC_PLANT,                       -1, -1
5802   },
5803
5804   {
5805     Xacid_1,                            TRUE,   FALSE,
5806     EL_ACID,                            -1, -1
5807   },
5808   {
5809     Xacid_2,                            FALSE,  FALSE,
5810     EL_ACID,                            -1, -1
5811   },
5812   {
5813     Xacid_3,                            FALSE,  FALSE,
5814     EL_ACID,                            -1, -1
5815   },
5816   {
5817     Xacid_4,                            FALSE,  FALSE,
5818     EL_ACID,                            -1, -1
5819   },
5820   {
5821     Xacid_5,                            FALSE,  FALSE,
5822     EL_ACID,                            -1, -1
5823   },
5824   {
5825     Xacid_6,                            FALSE,  FALSE,
5826     EL_ACID,                            -1, -1
5827   },
5828   {
5829     Xacid_7,                            FALSE,  FALSE,
5830     EL_ACID,                            -1, -1
5831   },
5832   {
5833     Xacid_8,                            FALSE,  FALSE,
5834     EL_ACID,                            -1, -1
5835   },
5836
5837   {
5838     Xfake_acid_1,                       TRUE,   FALSE,
5839     EL_EMC_FAKE_ACID,                   -1, -1
5840   },
5841   {
5842     Xfake_acid_2,                       FALSE,  FALSE,
5843     EL_EMC_FAKE_ACID,                   -1, -1
5844   },
5845   {
5846     Xfake_acid_3,                       FALSE,  FALSE,
5847     EL_EMC_FAKE_ACID,                   -1, -1
5848   },
5849   {
5850     Xfake_acid_4,                       FALSE,  FALSE,
5851     EL_EMC_FAKE_ACID,                   -1, -1
5852   },
5853   {
5854     Xfake_acid_5,                       FALSE,  FALSE,
5855     EL_EMC_FAKE_ACID,                   -1, -1
5856   },
5857   {
5858     Xfake_acid_6,                       FALSE,  FALSE,
5859     EL_EMC_FAKE_ACID,                   -1, -1
5860   },
5861   {
5862     Xfake_acid_7,                       FALSE,  FALSE,
5863     EL_EMC_FAKE_ACID,                   -1, -1
5864   },
5865   {
5866     Xfake_acid_8,                       FALSE,  FALSE,
5867     EL_EMC_FAKE_ACID,                   -1, -1
5868   },
5869
5870   {
5871     Xgrass,                             TRUE,   FALSE,
5872     EL_EMC_GRASS,                       -1, -1
5873   },
5874   {
5875     Ygrass_nB,                          FALSE,  FALSE,
5876     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_UP
5877   },
5878   {
5879     Ygrass_eB,                          FALSE,  FALSE,
5880     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_RIGHT
5881   },
5882   {
5883     Ygrass_sB,                          FALSE,  FALSE,
5884     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_DOWN
5885   },
5886   {
5887     Ygrass_wB,                          FALSE,  FALSE,
5888     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_LEFT
5889   },
5890
5891   {
5892     Xdirt,                              TRUE,   FALSE,
5893     EL_SAND,                            -1, -1
5894   },
5895   {
5896     Ydirt_nB,                           FALSE,  FALSE,
5897     EL_SAND,                            ACTION_DIGGING, MV_BIT_UP
5898   },
5899   {
5900     Ydirt_eB,                           FALSE,  FALSE,
5901     EL_SAND,                            ACTION_DIGGING, MV_BIT_RIGHT
5902   },
5903   {
5904     Ydirt_sB,                           FALSE,  FALSE,
5905     EL_SAND,                            ACTION_DIGGING, MV_BIT_DOWN
5906   },
5907   {
5908     Ydirt_wB,                           FALSE,  FALSE,
5909     EL_SAND,                            ACTION_DIGGING, MV_BIT_LEFT
5910   },
5911
5912   {
5913     Xandroid,                           TRUE,   FALSE,
5914     EL_EMC_ANDROID,                     ACTION_ACTIVE, -1
5915   },
5916   {
5917     Xandroid_1_n,                       FALSE,  FALSE,
5918     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_UP
5919   },
5920   {
5921     Xandroid_2_n,                       FALSE,  FALSE,
5922     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_UP
5923   },
5924   {
5925     Xandroid_1_e,                       FALSE,  FALSE,
5926     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_RIGHT
5927   },
5928   {
5929     Xandroid_2_e,                       FALSE,  FALSE,
5930     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_RIGHT
5931   },
5932   {
5933     Xandroid_1_w,                       FALSE,  FALSE,
5934     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_LEFT
5935   },
5936   {
5937     Xandroid_2_w,                       FALSE,  FALSE,
5938     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_LEFT
5939   },
5940   {
5941     Xandroid_1_s,                       FALSE,  FALSE,
5942     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_DOWN
5943   },
5944   {
5945     Xandroid_2_s,                       FALSE,  FALSE,
5946     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_DOWN
5947   },
5948   {
5949     Yandroid_n,                         FALSE,  FALSE,
5950     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_UP
5951   },
5952   {
5953     Yandroid_nB,                        FALSE,  TRUE,
5954     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_UP
5955   },
5956   {
5957     Yandroid_ne,                        FALSE,  FALSE,
5958     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_UPRIGHT
5959   },
5960   {
5961     Yandroid_neB,                       FALSE,  TRUE,
5962     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_UPRIGHT
5963   },
5964   {
5965     Yandroid_e,                         FALSE,  FALSE,
5966     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_RIGHT
5967   },
5968   {
5969     Yandroid_eB,                        FALSE,  TRUE,
5970     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_RIGHT
5971   },
5972   {
5973     Yandroid_se,                        FALSE,  FALSE,
5974     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_DOWNRIGHT
5975   },
5976   {
5977     Yandroid_seB,                       FALSE,  TRUE,
5978     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_DOWNRIGHT
5979   },
5980   {
5981     Yandroid_s,                         FALSE,  FALSE,
5982     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_DOWN
5983   },
5984   {
5985     Yandroid_sB,                        FALSE,  TRUE,
5986     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_DOWN
5987   },
5988   {
5989     Yandroid_sw,                        FALSE,  FALSE,
5990     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_DOWNLEFT
5991   },
5992   {
5993     Yandroid_swB,                       FALSE,  TRUE,
5994     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_DOWNLEFT
5995   },
5996   {
5997     Yandroid_w,                         FALSE,  FALSE,
5998     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_LEFT
5999   },
6000   {
6001     Yandroid_wB,                        FALSE,  TRUE,
6002     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_LEFT
6003   },
6004   {
6005     Yandroid_nw,                        FALSE,  FALSE,
6006     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_UPLEFT
6007   },
6008   {
6009     Yandroid_nwB,                       FALSE,  TRUE,
6010     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_UPLEFT
6011   },
6012
6013   {
6014     Xeater_n,                           TRUE,   FALSE,
6015     EL_YAMYAM_UP,                       -1, -1
6016   },
6017   {
6018     Xeater_e,                           TRUE,   FALSE,
6019     EL_YAMYAM_RIGHT,                    -1, -1
6020   },
6021   {
6022     Xeater_w,                           TRUE,   FALSE,
6023     EL_YAMYAM_LEFT,                     -1, -1
6024   },
6025   {
6026     Xeater_s,                           TRUE,   FALSE,
6027     EL_YAMYAM_DOWN,                     -1, -1
6028   },
6029   {
6030     Yeater_n,                           FALSE,  FALSE,
6031     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_UP
6032   },
6033   {
6034     Yeater_nB,                          FALSE,  TRUE,
6035     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_UP
6036   },
6037   {
6038     Yeater_e,                           FALSE,  FALSE,
6039     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_RIGHT
6040   },
6041   {
6042     Yeater_eB,                          FALSE,  TRUE,
6043     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_RIGHT
6044   },
6045   {
6046     Yeater_s,                           FALSE,  FALSE,
6047     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_DOWN
6048   },
6049   {
6050     Yeater_sB,                          FALSE,  TRUE,
6051     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_DOWN
6052   },
6053   {
6054     Yeater_w,                           FALSE,  FALSE,
6055     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_LEFT
6056   },
6057   {
6058     Yeater_wB,                          FALSE,  TRUE,
6059     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_LEFT
6060   },
6061   {
6062     Yeater_stone,                       FALSE,  FALSE,
6063     EL_YAMYAM,                          ACTION_SMASHED_BY_ROCK, -1
6064   },
6065   {
6066     Yeater_spring,                      FALSE,  FALSE,
6067     EL_YAMYAM,                          ACTION_SMASHED_BY_SPRING, -1
6068   },
6069
6070   {
6071     Xalien,                             TRUE,   FALSE,
6072     EL_ROBOT,                           -1, -1
6073   },
6074   {
6075     Xalien_pause,                       FALSE,  FALSE,
6076     EL_ROBOT,                           -1, -1
6077   },
6078   {
6079     Yalien_n,                           FALSE,  FALSE,
6080     EL_ROBOT,                           ACTION_MOVING, MV_BIT_UP
6081   },
6082   {
6083     Yalien_nB,                          FALSE,  TRUE,
6084     EL_ROBOT,                           ACTION_MOVING, MV_BIT_UP
6085   },
6086   {
6087     Yalien_e,                           FALSE,  FALSE,
6088     EL_ROBOT,                           ACTION_MOVING, MV_BIT_RIGHT
6089   },
6090   {
6091     Yalien_eB,                          FALSE,  TRUE,
6092     EL_ROBOT,                           ACTION_MOVING, MV_BIT_RIGHT
6093   },
6094   {
6095     Yalien_s,                           FALSE,  FALSE,
6096     EL_ROBOT,                           ACTION_MOVING, MV_BIT_DOWN
6097   },
6098   {
6099     Yalien_sB,                          FALSE,  TRUE,
6100     EL_ROBOT,                           ACTION_MOVING, MV_BIT_DOWN
6101   },
6102   {
6103     Yalien_w,                           FALSE,  FALSE,
6104     EL_ROBOT,                           ACTION_MOVING, MV_BIT_LEFT
6105   },
6106   {
6107     Yalien_wB,                          FALSE,  TRUE,
6108     EL_ROBOT,                           ACTION_MOVING, MV_BIT_LEFT
6109   },
6110   {
6111     Yalien_stone,                       FALSE,  FALSE,
6112     EL_ROBOT,                           ACTION_SMASHED_BY_ROCK, -1
6113   },
6114   {
6115     Yalien_spring,                      FALSE,  FALSE,
6116     EL_ROBOT,                           ACTION_SMASHED_BY_SPRING, -1
6117   },
6118
6119   {
6120     Xbug_1_n,                           TRUE,   FALSE,
6121     EL_BUG_UP,                          -1, -1
6122   },
6123   {
6124     Xbug_1_e,                           TRUE,   FALSE,
6125     EL_BUG_RIGHT,                       -1, -1
6126   },
6127   {
6128     Xbug_1_s,                           TRUE,   FALSE,
6129     EL_BUG_DOWN,                        -1, -1
6130   },
6131   {
6132     Xbug_1_w,                           TRUE,   FALSE,
6133     EL_BUG_LEFT,                        -1, -1
6134   },
6135   {
6136     Xbug_2_n,                           FALSE,  FALSE,
6137     EL_BUG_UP,                          -1, -1
6138   },
6139   {
6140     Xbug_2_e,                           FALSE,  FALSE,
6141     EL_BUG_RIGHT,                       -1, -1
6142   },
6143   {
6144     Xbug_2_s,                           FALSE,  FALSE,
6145     EL_BUG_DOWN,                        -1, -1
6146   },
6147   {
6148     Xbug_2_w,                           FALSE,  FALSE,
6149     EL_BUG_LEFT,                        -1, -1
6150   },
6151   {
6152     Ybug_n,                             FALSE,  FALSE,
6153     EL_BUG,                             ACTION_MOVING, MV_BIT_UP
6154   },
6155   {
6156     Ybug_nB,                            FALSE,  TRUE,
6157     EL_BUG,                             ACTION_MOVING, MV_BIT_UP
6158   },
6159   {
6160     Ybug_e,                             FALSE,  FALSE,
6161     EL_BUG,                             ACTION_MOVING, MV_BIT_RIGHT
6162   },
6163   {
6164     Ybug_eB,                            FALSE,  TRUE,
6165     EL_BUG,                             ACTION_MOVING, MV_BIT_RIGHT
6166   },
6167   {
6168     Ybug_s,                             FALSE,  FALSE,
6169     EL_BUG,                             ACTION_MOVING, MV_BIT_DOWN
6170   },
6171   {
6172     Ybug_sB,                            FALSE,  TRUE,
6173     EL_BUG,                             ACTION_MOVING, MV_BIT_DOWN
6174   },
6175   {
6176     Ybug_w,                             FALSE,  FALSE,
6177     EL_BUG,                             ACTION_MOVING, MV_BIT_LEFT
6178   },
6179   {
6180     Ybug_wB,                            FALSE,  TRUE,
6181     EL_BUG,                             ACTION_MOVING, MV_BIT_LEFT
6182   },
6183   {
6184     Ybug_w_n,                           FALSE,  FALSE,
6185     EL_BUG,                             ACTION_TURNING_FROM_LEFT, MV_BIT_UP
6186   },
6187   {
6188     Ybug_n_e,                           FALSE,  FALSE,
6189     EL_BUG,                             ACTION_TURNING_FROM_UP, MV_BIT_RIGHT
6190   },
6191   {
6192     Ybug_e_s,                           FALSE,  FALSE,
6193     EL_BUG,                             ACTION_TURNING_FROM_RIGHT, MV_BIT_DOWN
6194   },
6195   {
6196     Ybug_s_w,                           FALSE,  FALSE,
6197     EL_BUG,                             ACTION_TURNING_FROM_DOWN, MV_BIT_LEFT
6198   },
6199   {
6200     Ybug_e_n,                           FALSE,  FALSE,
6201     EL_BUG,                             ACTION_TURNING_FROM_RIGHT, MV_BIT_UP
6202   },
6203   {
6204     Ybug_s_e,                           FALSE,  FALSE,
6205     EL_BUG,                             ACTION_TURNING_FROM_DOWN, MV_BIT_RIGHT
6206   },
6207   {
6208     Ybug_w_s,                           FALSE,  FALSE,
6209     EL_BUG,                             ACTION_TURNING_FROM_LEFT, MV_BIT_DOWN
6210   },
6211   {
6212     Ybug_n_w,                           FALSE,  FALSE,
6213     EL_BUG,                             ACTION_TURNING_FROM_UP, MV_BIT_LEFT
6214   },
6215   {
6216     Ybug_stone,                         FALSE,  FALSE,
6217     EL_BUG,                             ACTION_SMASHED_BY_ROCK, -1
6218   },
6219   {
6220     Ybug_spring,                        FALSE,  FALSE,
6221     EL_BUG,                             ACTION_SMASHED_BY_SPRING, -1
6222   },
6223
6224   {
6225     Xtank_1_n,                          TRUE,   FALSE,
6226     EL_SPACESHIP_UP,                    -1, -1
6227   },
6228   {
6229     Xtank_1_e,                          TRUE,   FALSE,
6230     EL_SPACESHIP_RIGHT,                 -1, -1
6231   },
6232   {
6233     Xtank_1_s,                          TRUE,   FALSE,
6234     EL_SPACESHIP_DOWN,                  -1, -1
6235   },
6236   {
6237     Xtank_1_w,                          TRUE,   FALSE,
6238     EL_SPACESHIP_LEFT,                  -1, -1
6239   },
6240   {
6241     Xtank_2_n,                          FALSE,  FALSE,
6242     EL_SPACESHIP_UP,                    -1, -1
6243   },
6244   {
6245     Xtank_2_e,                          FALSE,  FALSE,
6246     EL_SPACESHIP_RIGHT,                 -1, -1
6247   },
6248   {
6249     Xtank_2_s,                          FALSE,  FALSE,
6250     EL_SPACESHIP_DOWN,                  -1, -1
6251   },
6252   {
6253     Xtank_2_w,                          FALSE,  FALSE,
6254     EL_SPACESHIP_LEFT,                  -1, -1
6255   },
6256   {
6257     Ytank_n,                            FALSE,  FALSE,
6258     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_UP
6259   },
6260   {
6261     Ytank_nB,                           FALSE,  TRUE,
6262     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_UP
6263   },
6264   {
6265     Ytank_e,                            FALSE,  FALSE,
6266     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_RIGHT
6267   },
6268   {
6269     Ytank_eB,                           FALSE,  TRUE,
6270     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_RIGHT
6271   },
6272   {
6273     Ytank_s,                            FALSE,  FALSE,
6274     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_DOWN
6275   },
6276   {
6277     Ytank_sB,                           FALSE,  TRUE,
6278     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_DOWN
6279   },
6280   {
6281     Ytank_w,                            FALSE,  FALSE,
6282     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_LEFT
6283   },
6284   {
6285     Ytank_wB,                           FALSE,  TRUE,
6286     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_LEFT
6287   },
6288   {
6289     Ytank_w_n,                          FALSE,  FALSE,
6290     EL_SPACESHIP,                       ACTION_TURNING_FROM_LEFT, MV_BIT_UP
6291   },
6292   {
6293     Ytank_n_e,                          FALSE,  FALSE,
6294     EL_SPACESHIP,                       ACTION_TURNING_FROM_UP, MV_BIT_RIGHT
6295   },
6296   {
6297     Ytank_e_s,                          FALSE,  FALSE,
6298     EL_SPACESHIP,                       ACTION_TURNING_FROM_RIGHT, MV_BIT_DOWN
6299   },
6300   {
6301     Ytank_s_w,                          FALSE,  FALSE,
6302     EL_SPACESHIP,                       ACTION_TURNING_FROM_DOWN, MV_BIT_LEFT
6303   },
6304   {
6305     Ytank_e_n,                          FALSE,  FALSE,
6306     EL_SPACESHIP,                       ACTION_TURNING_FROM_RIGHT, MV_BIT_UP
6307   },
6308   {
6309     Ytank_s_e,                          FALSE,  FALSE,
6310     EL_SPACESHIP,                       ACTION_TURNING_FROM_DOWN, MV_BIT_RIGHT
6311   },
6312   {
6313     Ytank_w_s,                          FALSE,  FALSE,
6314     EL_SPACESHIP,                       ACTION_TURNING_FROM_LEFT, MV_BIT_DOWN
6315   },
6316   {
6317     Ytank_n_w,                          FALSE,  FALSE,
6318     EL_SPACESHIP,                       ACTION_TURNING_FROM_UP, MV_BIT_LEFT
6319   },
6320   {
6321     Ytank_stone,                        FALSE,  FALSE,
6322     EL_SPACESHIP,                       ACTION_SMASHED_BY_ROCK, -1
6323   },
6324   {
6325     Ytank_spring,                       FALSE,  FALSE,
6326     EL_SPACESHIP,                       ACTION_SMASHED_BY_SPRING, -1
6327   },
6328
6329   {
6330     Xemerald,                           TRUE,   FALSE,
6331     EL_EMERALD,                         -1, -1
6332   },
6333   {
6334     Xemerald_pause,                     FALSE,  FALSE,
6335     EL_EMERALD,                         -1, -1
6336   },
6337   {
6338     Xemerald_fall,                      FALSE,  FALSE,
6339     EL_EMERALD,                         -1, -1
6340   },
6341   {
6342     Xemerald_shine,                     FALSE,  FALSE,
6343     EL_EMERALD,                         ACTION_TWINKLING, -1
6344   },
6345   {
6346     Yemerald_s,                         FALSE,  FALSE,
6347     EL_EMERALD,                         ACTION_FALLING, -1
6348   },
6349   {
6350     Yemerald_sB,                        FALSE,  TRUE,
6351     EL_EMERALD,                         ACTION_FALLING, -1
6352   },
6353   {
6354     Yemerald_e,                         FALSE,  FALSE,
6355     EL_EMERALD,                         ACTION_MOVING, MV_BIT_RIGHT
6356   },
6357   {
6358     Yemerald_eB,                        FALSE,  TRUE,
6359     EL_EMERALD,                         ACTION_MOVING, MV_BIT_RIGHT
6360   },
6361   {
6362     Yemerald_w,                         FALSE,  FALSE,
6363     EL_EMERALD,                         ACTION_MOVING, MV_BIT_LEFT
6364   },
6365   {
6366     Yemerald_wB,                        FALSE,  TRUE,
6367     EL_EMERALD,                         ACTION_MOVING, MV_BIT_LEFT
6368   },
6369   {
6370     Yemerald_blank,                     FALSE,  FALSE,
6371     EL_EMERALD,                         ACTION_COLLECTING, -1
6372   },
6373
6374   {
6375     Xdiamond,                           TRUE,   FALSE,
6376     EL_DIAMOND,                         -1, -1
6377   },
6378   {
6379     Xdiamond_pause,                     FALSE,  FALSE,
6380     EL_DIAMOND,                         -1, -1
6381   },
6382   {
6383     Xdiamond_fall,                      FALSE,  FALSE,
6384     EL_DIAMOND,                         -1, -1
6385   },
6386   {
6387     Xdiamond_shine,                     FALSE,  FALSE,
6388     EL_DIAMOND,                         ACTION_TWINKLING, -1
6389   },
6390   {
6391     Ydiamond_s,                         FALSE,  FALSE,
6392     EL_DIAMOND,                         ACTION_FALLING, -1
6393   },
6394   {
6395     Ydiamond_sB,                        FALSE,  TRUE,
6396     EL_DIAMOND,                         ACTION_FALLING, -1
6397   },
6398   {
6399     Ydiamond_e,                         FALSE,  FALSE,
6400     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_RIGHT
6401   },
6402   {
6403     Ydiamond_eB,                        FALSE,  TRUE,
6404     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_RIGHT
6405   },
6406   {
6407     Ydiamond_w,                         FALSE,  FALSE,
6408     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_LEFT
6409   },
6410   {
6411     Ydiamond_wB,                        FALSE,  TRUE,
6412     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_LEFT
6413   },
6414   {
6415     Ydiamond_blank,                     FALSE,  FALSE,
6416     EL_DIAMOND,                         ACTION_COLLECTING, -1
6417   },
6418   {
6419     Ydiamond_stone,                     FALSE,  FALSE,
6420     EL_DIAMOND,                         ACTION_SMASHED_BY_ROCK, -1
6421   },
6422
6423   {
6424     Xstone,                             TRUE,   FALSE,
6425     EL_ROCK,                            -1, -1
6426   },
6427   {
6428     Xstone_pause,                       FALSE,  FALSE,
6429     EL_ROCK,                            -1, -1
6430   },
6431   {
6432     Xstone_fall,                        FALSE,  FALSE,
6433     EL_ROCK,                            -1, -1
6434   },
6435   {
6436     Ystone_s,                           FALSE,  FALSE,
6437     EL_ROCK,                            ACTION_FALLING, -1
6438   },
6439   {
6440     Ystone_sB,                          FALSE,  TRUE,
6441     EL_ROCK,                            ACTION_FALLING, -1
6442   },
6443   {
6444     Ystone_e,                           FALSE,  FALSE,
6445     EL_ROCK,                            ACTION_MOVING, MV_BIT_RIGHT
6446   },
6447   {
6448     Ystone_eB,                          FALSE,  TRUE,
6449     EL_ROCK,                            ACTION_MOVING, MV_BIT_RIGHT
6450   },
6451   {
6452     Ystone_w,                           FALSE,  FALSE,
6453     EL_ROCK,                            ACTION_MOVING, MV_BIT_LEFT
6454   },
6455   {
6456     Ystone_wB,                          FALSE,  TRUE,
6457     EL_ROCK,                            ACTION_MOVING, MV_BIT_LEFT
6458   },
6459
6460   {
6461     Xbomb,                              TRUE,   FALSE,
6462     EL_BOMB,                            -1, -1
6463   },
6464   {
6465     Xbomb_pause,                        FALSE,  FALSE,
6466     EL_BOMB,                            -1, -1
6467   },
6468   {
6469     Xbomb_fall,                         FALSE,  FALSE,
6470     EL_BOMB,                            -1, -1
6471   },
6472   {
6473     Ybomb_s,                            FALSE,  FALSE,
6474     EL_BOMB,                            ACTION_FALLING, -1
6475   },
6476   {
6477     Ybomb_sB,                           FALSE,  TRUE,
6478     EL_BOMB,                            ACTION_FALLING, -1
6479   },
6480   {
6481     Ybomb_e,                            FALSE,  FALSE,
6482     EL_BOMB,                            ACTION_MOVING, MV_BIT_RIGHT
6483   },
6484   {
6485     Ybomb_eB,                           FALSE,  TRUE,
6486     EL_BOMB,                            ACTION_MOVING, MV_BIT_RIGHT
6487   },
6488   {
6489     Ybomb_w,                            FALSE,  FALSE,
6490     EL_BOMB,                            ACTION_MOVING, MV_BIT_LEFT
6491   },
6492   {
6493     Ybomb_wB,                           FALSE,  TRUE,
6494     EL_BOMB,                            ACTION_MOVING, MV_BIT_LEFT
6495   },
6496   {
6497     Ybomb_blank,                        FALSE,  FALSE,
6498     EL_BOMB,                            ACTION_ACTIVATING, -1
6499   },
6500
6501   {
6502     Xnut,                               TRUE,   FALSE,
6503     EL_NUT,                             -1, -1
6504   },
6505   {
6506     Xnut_pause,                         FALSE,  FALSE,
6507     EL_NUT,                             -1, -1
6508   },
6509   {
6510     Xnut_fall,                          FALSE,  FALSE,
6511     EL_NUT,                             -1, -1
6512   },
6513   {
6514     Ynut_s,                             FALSE,  FALSE,
6515     EL_NUT,                             ACTION_FALLING, -1
6516   },
6517   {
6518     Ynut_sB,                            FALSE,  TRUE,
6519     EL_NUT,                             ACTION_FALLING, -1
6520   },
6521   {
6522     Ynut_e,                             FALSE,  FALSE,
6523     EL_NUT,                             ACTION_MOVING, MV_BIT_RIGHT
6524   },
6525   {
6526     Ynut_eB,                            FALSE,  TRUE,
6527     EL_NUT,                             ACTION_MOVING, MV_BIT_RIGHT
6528   },
6529   {
6530     Ynut_w,                             FALSE,  FALSE,
6531     EL_NUT,                             ACTION_MOVING, MV_BIT_LEFT
6532   },
6533   {
6534     Ynut_wB,                            FALSE,  TRUE,
6535     EL_NUT,                             ACTION_MOVING, MV_BIT_LEFT
6536   },
6537   {
6538     Ynut_stone,                         FALSE,  FALSE,
6539     EL_NUT,                             ACTION_BREAKING, -1
6540   },
6541
6542   {
6543     Xspring,                            TRUE,   FALSE,
6544     EL_SPRING,                          -1, -1
6545   },
6546   {
6547     Xspring_pause,                      FALSE,  FALSE,
6548     EL_SPRING,                          -1, -1
6549   },
6550   {
6551     Xspring_e,                          TRUE,   FALSE,
6552     EL_SPRING_RIGHT,                    -1, -1
6553   },
6554   {
6555     Xspring_w,                          TRUE,   FALSE,
6556     EL_SPRING_LEFT,                     -1, -1
6557   },
6558   {
6559     Xspring_fall,                       FALSE,  FALSE,
6560     EL_SPRING,                          -1, -1
6561   },
6562   {
6563     Yspring_s,                          FALSE,  FALSE,
6564     EL_SPRING,                          ACTION_FALLING, -1
6565   },
6566   {
6567     Yspring_sB,                         FALSE,  TRUE,
6568     EL_SPRING,                          ACTION_FALLING, -1
6569   },
6570   {
6571     Yspring_e,                          FALSE,  FALSE,
6572     EL_SPRING,                          ACTION_MOVING, MV_BIT_RIGHT
6573   },
6574   {
6575     Yspring_eB,                         FALSE,  TRUE,
6576     EL_SPRING,                          ACTION_MOVING, MV_BIT_RIGHT
6577   },
6578   {
6579     Yspring_w,                          FALSE,  FALSE,
6580     EL_SPRING,                          ACTION_MOVING, MV_BIT_LEFT
6581   },
6582   {
6583     Yspring_wB,                         FALSE,  TRUE,
6584     EL_SPRING,                          ACTION_MOVING, MV_BIT_LEFT
6585   },
6586   {
6587     Yspring_alien_e,                    FALSE,  FALSE,
6588     EL_SPRING,                          ACTION_EATING, MV_BIT_RIGHT
6589   },
6590   {
6591     Yspring_alien_eB,                   FALSE,  TRUE,
6592     EL_SPRING,                          ACTION_EATING, MV_BIT_RIGHT
6593   },
6594   {
6595     Yspring_alien_w,                    FALSE,  FALSE,
6596     EL_SPRING,                          ACTION_EATING, MV_BIT_LEFT
6597   },
6598   {
6599     Yspring_alien_wB,                   FALSE,  TRUE,
6600     EL_SPRING,                          ACTION_EATING, MV_BIT_LEFT
6601   },
6602
6603   {
6604     Xpush_emerald_e,                    FALSE,  FALSE,
6605     EL_EMERALD,                         -1, MV_BIT_RIGHT
6606   },
6607   {
6608     Xpush_emerald_w,                    FALSE,  FALSE,
6609     EL_EMERALD,                         -1, MV_BIT_LEFT
6610   },
6611   {
6612     Xpush_diamond_e,                    FALSE,  FALSE,
6613     EL_DIAMOND,                         -1, MV_BIT_RIGHT
6614   },
6615   {
6616     Xpush_diamond_w,                    FALSE,  FALSE,
6617     EL_DIAMOND,                         -1, MV_BIT_LEFT
6618   },
6619   {
6620     Xpush_stone_e,                      FALSE,  FALSE,
6621     EL_ROCK,                            -1, MV_BIT_RIGHT
6622   },
6623   {
6624     Xpush_stone_w,                      FALSE,  FALSE,
6625     EL_ROCK,                            -1, MV_BIT_LEFT
6626   },
6627   {
6628     Xpush_bomb_e,                       FALSE,  FALSE,
6629     EL_BOMB,                            -1, MV_BIT_RIGHT
6630   },
6631   {
6632     Xpush_bomb_w,                       FALSE,  FALSE,
6633     EL_BOMB,                            -1, MV_BIT_LEFT
6634   },
6635   {
6636     Xpush_nut_e,                        FALSE,  FALSE,
6637     EL_NUT,                             -1, MV_BIT_RIGHT
6638   },
6639   {
6640     Xpush_nut_w,                        FALSE,  FALSE,
6641     EL_NUT,                             -1, MV_BIT_LEFT
6642   },
6643   {
6644     Xpush_spring_e,                     FALSE,  FALSE,
6645     EL_SPRING_RIGHT,                    -1, MV_BIT_RIGHT
6646   },
6647   {
6648     Xpush_spring_w,                     FALSE,  FALSE,
6649     EL_SPRING_LEFT,                     -1, MV_BIT_LEFT
6650   },
6651
6652   {
6653     Xdynamite,                          TRUE,   FALSE,
6654     EL_EM_DYNAMITE,                     -1, -1
6655   },
6656   {
6657     Ydynamite_blank,                    FALSE,  FALSE,
6658     EL_EM_DYNAMITE,                     ACTION_COLLECTING, -1
6659   },
6660   {
6661     Xdynamite_1,                        TRUE,   FALSE,
6662     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6663   },
6664   {
6665     Xdynamite_2,                        FALSE,  FALSE,
6666     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6667   },
6668   {
6669     Xdynamite_3,                        FALSE,  FALSE,
6670     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6671   },
6672   {
6673     Xdynamite_4,                        FALSE,  FALSE,
6674     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6675   },
6676
6677   {
6678     Xkey_1,                             TRUE,   FALSE,
6679     EL_EM_KEY_1,                        -1, -1
6680   },
6681   {
6682     Xkey_2,                             TRUE,   FALSE,
6683     EL_EM_KEY_2,                        -1, -1
6684   },
6685   {
6686     Xkey_3,                             TRUE,   FALSE,
6687     EL_EM_KEY_3,                        -1, -1
6688   },
6689   {
6690     Xkey_4,                             TRUE,   FALSE,
6691     EL_EM_KEY_4,                        -1, -1
6692   },
6693   {
6694     Xkey_5,                             TRUE,   FALSE,
6695     EL_EMC_KEY_5,                       -1, -1
6696   },
6697   {
6698     Xkey_6,                             TRUE,   FALSE,
6699     EL_EMC_KEY_6,                       -1, -1
6700   },
6701   {
6702     Xkey_7,                             TRUE,   FALSE,
6703     EL_EMC_KEY_7,                       -1, -1
6704   },
6705   {
6706     Xkey_8,                             TRUE,   FALSE,
6707     EL_EMC_KEY_8,                       -1, -1
6708   },
6709
6710   {
6711     Xdoor_1,                            TRUE,   FALSE,
6712     EL_EM_GATE_1,                       -1, -1
6713   },
6714   {
6715     Xdoor_2,                            TRUE,   FALSE,
6716     EL_EM_GATE_2,                       -1, -1
6717   },
6718   {
6719     Xdoor_3,                            TRUE,   FALSE,
6720     EL_EM_GATE_3,                       -1, -1
6721   },
6722   {
6723     Xdoor_4,                            TRUE,   FALSE,
6724     EL_EM_GATE_4,                       -1, -1
6725   },
6726   {
6727     Xdoor_5,                            TRUE,   FALSE,
6728     EL_EMC_GATE_5,                      -1, -1
6729   },
6730   {
6731     Xdoor_6,                            TRUE,   FALSE,
6732     EL_EMC_GATE_6,                      -1, -1
6733   },
6734   {
6735     Xdoor_7,                            TRUE,   FALSE,
6736     EL_EMC_GATE_7,                      -1, -1
6737   },
6738   {
6739     Xdoor_8,                            TRUE,   FALSE,
6740     EL_EMC_GATE_8,                      -1, -1
6741   },
6742
6743   {
6744     Xfake_door_1,                       TRUE,   FALSE,
6745     EL_EM_GATE_1_GRAY,                  -1, -1
6746   },
6747   {
6748     Xfake_door_2,                       TRUE,   FALSE,
6749     EL_EM_GATE_2_GRAY,                  -1, -1
6750   },
6751   {
6752     Xfake_door_3,                       TRUE,   FALSE,
6753     EL_EM_GATE_3_GRAY,                  -1, -1
6754   },
6755   {
6756     Xfake_door_4,                       TRUE,   FALSE,
6757     EL_EM_GATE_4_GRAY,                  -1, -1
6758   },
6759   {
6760     Xfake_door_5,                       TRUE,   FALSE,
6761     EL_EMC_GATE_5_GRAY,                 -1, -1
6762   },
6763   {
6764     Xfake_door_6,                       TRUE,   FALSE,
6765     EL_EMC_GATE_6_GRAY,                 -1, -1
6766   },
6767   {
6768     Xfake_door_7,                       TRUE,   FALSE,
6769     EL_EMC_GATE_7_GRAY,                 -1, -1
6770   },
6771   {
6772     Xfake_door_8,                       TRUE,   FALSE,
6773     EL_EMC_GATE_8_GRAY,                 -1, -1
6774   },
6775
6776   {
6777     Xballoon,                           TRUE,   FALSE,
6778     EL_BALLOON,                         -1, -1
6779   },
6780   {
6781     Yballoon_n,                         FALSE,  FALSE,
6782     EL_BALLOON,                         ACTION_MOVING, MV_BIT_UP
6783   },
6784   {
6785     Yballoon_nB,                        FALSE,  TRUE,
6786     EL_BALLOON,                         ACTION_MOVING, MV_BIT_UP
6787   },
6788   {
6789     Yballoon_e,                         FALSE,  FALSE,
6790     EL_BALLOON,                         ACTION_MOVING, MV_BIT_RIGHT
6791   },
6792   {
6793     Yballoon_eB,                        FALSE,  TRUE,
6794     EL_BALLOON,                         ACTION_MOVING, MV_BIT_RIGHT
6795   },
6796   {
6797     Yballoon_s,                         FALSE,  FALSE,
6798     EL_BALLOON,                         ACTION_MOVING, MV_BIT_DOWN
6799   },
6800   {
6801     Yballoon_sB,                        FALSE,  TRUE,
6802     EL_BALLOON,                         ACTION_MOVING, MV_BIT_DOWN
6803   },
6804   {
6805     Yballoon_w,                         FALSE,  FALSE,
6806     EL_BALLOON,                         ACTION_MOVING, MV_BIT_LEFT
6807   },
6808   {
6809     Yballoon_wB,                        FALSE,  TRUE,
6810     EL_BALLOON,                         ACTION_MOVING, MV_BIT_LEFT
6811   },
6812
6813   {
6814     Xball_1,                            TRUE,   FALSE,
6815     EL_EMC_MAGIC_BALL,                  -1, -1
6816   },
6817   {
6818     Yball_1,                            FALSE,  FALSE,
6819     EL_EMC_MAGIC_BALL,                  ACTION_ACTIVE, -1
6820   },
6821   {
6822     Xball_2,                            FALSE,  FALSE,
6823     EL_EMC_MAGIC_BALL,                  ACTION_ACTIVE, -1
6824   },
6825   {
6826     Yball_2,                            FALSE,  FALSE,
6827     EL_EMC_MAGIC_BALL,                  ACTION_ACTIVE, -1
6828   },
6829   {
6830     Yball_blank,                        FALSE,  FALSE,
6831     EL_EMC_MAGIC_BALL,                  ACTION_DROPPING, -1
6832   },
6833
6834   {
6835     Xamoeba_1,                          TRUE,   FALSE,
6836     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
6837   },
6838   {
6839     Xamoeba_2,                          FALSE,  FALSE,
6840     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
6841   },
6842   {
6843     Xamoeba_3,                          FALSE,  FALSE,
6844     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
6845   },
6846   {
6847     Xamoeba_4,                          FALSE,  FALSE,
6848     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
6849   },
6850   {
6851     Xamoeba_5,                          TRUE,   FALSE,
6852     EL_AMOEBA_WET,                      ACTION_OTHER, -1
6853   },
6854   {
6855     Xamoeba_6,                          FALSE,  FALSE,
6856     EL_AMOEBA_WET,                      ACTION_OTHER, -1
6857   },
6858   {
6859     Xamoeba_7,                          FALSE,  FALSE,
6860     EL_AMOEBA_WET,                      ACTION_OTHER, -1
6861   },
6862   {
6863     Xamoeba_8,                          FALSE,  FALSE,
6864     EL_AMOEBA_WET,                      ACTION_OTHER, -1
6865   },
6866
6867   {
6868     Xdrip,                              TRUE,   FALSE,
6869     EL_AMOEBA_DROP,                     ACTION_GROWING, -1
6870   },
6871   {
6872     Xdrip_fall,                         FALSE,  FALSE,
6873     EL_AMOEBA_DROP,                     -1, -1
6874   },
6875   {
6876     Xdrip_stretch,                      FALSE,  FALSE,
6877     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6878   },
6879   {
6880     Xdrip_stretchB,                     FALSE,  TRUE,
6881     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6882   },
6883   {
6884     Ydrip_1_s,                          FALSE,  FALSE,
6885     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6886   },
6887   {
6888     Ydrip_1_sB,                         FALSE,  TRUE,
6889     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6890   },
6891   {
6892     Ydrip_2_s,                          FALSE,  FALSE,
6893     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6894   },
6895   {
6896     Ydrip_2_sB,                         FALSE,  TRUE,
6897     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6898   },
6899
6900   {
6901     Xwonderwall,                        TRUE,   FALSE,
6902     EL_MAGIC_WALL,                      -1, -1
6903   },
6904   {
6905     Ywonderwall,                        FALSE,  FALSE,
6906     EL_MAGIC_WALL,                      ACTION_ACTIVE, -1
6907   },
6908
6909   {
6910     Xwheel,                             TRUE,   FALSE,
6911     EL_ROBOT_WHEEL,                     -1, -1
6912   },
6913   {
6914     Ywheel,                             FALSE,  FALSE,
6915     EL_ROBOT_WHEEL,                     ACTION_ACTIVE, -1
6916   },
6917
6918   {
6919     Xswitch,                            TRUE,   FALSE,
6920     EL_EMC_MAGIC_BALL_SWITCH,           -1, -1
6921   },
6922   {
6923     Yswitch,                            FALSE,  FALSE,
6924     EL_EMC_MAGIC_BALL_SWITCH,           ACTION_ACTIVE, -1
6925   },
6926
6927   {
6928     Xbumper,                            TRUE,   FALSE,
6929     EL_EMC_SPRING_BUMPER,               -1, -1
6930   },
6931   {
6932     Ybumper,                            FALSE,  FALSE,
6933     EL_EMC_SPRING_BUMPER,               ACTION_ACTIVE, -1
6934   },
6935
6936   {
6937     Xacid_nw,                           TRUE,   FALSE,
6938     EL_ACID_POOL_TOPLEFT,               -1, -1
6939   },
6940   {
6941     Xacid_ne,                           TRUE,   FALSE,
6942     EL_ACID_POOL_TOPRIGHT,              -1, -1
6943   },
6944   {
6945     Xacid_sw,                           TRUE,   FALSE,
6946     EL_ACID_POOL_BOTTOMLEFT,            -1, -1
6947   },
6948   {
6949     Xacid_s,                            TRUE,   FALSE,
6950     EL_ACID_POOL_BOTTOM,                -1, -1
6951   },
6952   {
6953     Xacid_se,                           TRUE,   FALSE,
6954     EL_ACID_POOL_BOTTOMRIGHT,           -1, -1
6955   },
6956
6957   {
6958     Xfake_blank,                        TRUE,   FALSE,
6959     EL_INVISIBLE_WALL,                  -1, -1
6960   },
6961   {
6962     Yfake_blank,                        FALSE,  FALSE,
6963     EL_INVISIBLE_WALL,                  ACTION_ACTIVE, -1
6964   },
6965
6966   {
6967     Xfake_grass,                        TRUE,   FALSE,
6968     EL_EMC_FAKE_GRASS,                  -1, -1
6969   },
6970   {
6971     Yfake_grass,                        FALSE,  FALSE,
6972     EL_EMC_FAKE_GRASS,                  ACTION_ACTIVE, -1
6973   },
6974
6975   {
6976     Xfake_amoeba,                       TRUE,   FALSE,
6977     EL_EMC_DRIPPER,                     -1, -1
6978   },
6979   {
6980     Yfake_amoeba,                       FALSE,  FALSE,
6981     EL_EMC_DRIPPER,                     ACTION_ACTIVE, -1
6982   },
6983
6984   {
6985     Xlenses,                            TRUE,   FALSE,
6986     EL_EMC_LENSES,                      -1, -1
6987   },
6988
6989   {
6990     Xmagnify,                           TRUE,   FALSE,
6991     EL_EMC_MAGNIFIER,                   -1, -1
6992   },
6993
6994   {
6995     Xsand,                              TRUE,   FALSE,
6996     EL_QUICKSAND_EMPTY,                 -1, -1
6997   },
6998   {
6999     Xsand_stone,                        TRUE,   FALSE,
7000     EL_QUICKSAND_FULL,                  -1, -1
7001   },
7002   {
7003     Xsand_stonein_1,                    FALSE,  TRUE,
7004     EL_ROCK,                            ACTION_FILLING, -1
7005   },
7006   {
7007     Xsand_stonein_2,                    FALSE,  TRUE,
7008     EL_ROCK,                            ACTION_FILLING, -1
7009   },
7010   {
7011     Xsand_stonein_3,                    FALSE,  TRUE,
7012     EL_ROCK,                            ACTION_FILLING, -1
7013   },
7014   {
7015     Xsand_stonein_4,                    FALSE,  TRUE,
7016     EL_ROCK,                            ACTION_FILLING, -1
7017   },
7018   {
7019     Xsand_sandstone_1,                  FALSE,  FALSE,
7020     EL_QUICKSAND_FILLING,               -1, -1
7021   },
7022   {
7023     Xsand_sandstone_2,                  FALSE,  FALSE,
7024     EL_QUICKSAND_FILLING,               -1, -1
7025   },
7026   {
7027     Xsand_sandstone_3,                  FALSE,  FALSE,
7028     EL_QUICKSAND_FILLING,               -1, -1
7029   },
7030   {
7031     Xsand_sandstone_4,                  FALSE,  FALSE,
7032     EL_QUICKSAND_FILLING,               -1, -1
7033   },
7034   {
7035     Xsand_stonesand_1,                  FALSE,  FALSE,
7036     EL_QUICKSAND_EMPTYING,              -1, -1
7037   },
7038   {
7039     Xsand_stonesand_2,                  FALSE,  FALSE,
7040     EL_QUICKSAND_EMPTYING,              -1, -1
7041   },
7042   {
7043     Xsand_stonesand_3,                  FALSE,  FALSE,
7044     EL_QUICKSAND_EMPTYING,              -1, -1
7045   },
7046   {
7047     Xsand_stonesand_4,                  FALSE,  FALSE,
7048     EL_QUICKSAND_EMPTYING,              -1, -1
7049   },
7050   {
7051     Xsand_stoneout_1,                   FALSE,  FALSE,
7052     EL_ROCK,                            ACTION_EMPTYING, -1
7053   },
7054   {
7055     Xsand_stoneout_2,                   FALSE,  FALSE,
7056     EL_ROCK,                            ACTION_EMPTYING, -1
7057   },
7058   {
7059     Xsand_stonesand_quickout_1,         FALSE,  FALSE,
7060     EL_QUICKSAND_EMPTYING,              -1, -1
7061   },
7062   {
7063     Xsand_stonesand_quickout_2,         FALSE,  FALSE,
7064     EL_QUICKSAND_EMPTYING,              -1, -1
7065   },
7066
7067   {
7068     Xslide_ns,                          TRUE,   FALSE,
7069     EL_EXPANDABLE_WALL_VERTICAL,        -1, -1
7070   },
7071   {
7072     Yslide_ns_blank,                    FALSE,  FALSE,
7073     EL_EXPANDABLE_WALL_VERTICAL,        ACTION_GROWING, -1
7074   },
7075   {
7076     Xslide_ew,                          TRUE,   FALSE,
7077     EL_EXPANDABLE_WALL_HORIZONTAL,      -1, -1
7078   },
7079   {
7080     Yslide_ew_blank,                    FALSE,  FALSE,
7081     EL_EXPANDABLE_WALL_HORIZONTAL,      ACTION_GROWING, -1
7082   },
7083
7084   {
7085     Xwind_n,                            TRUE,   FALSE,
7086     EL_BALLOON_SWITCH_UP,               -1, -1
7087   },
7088   {
7089     Xwind_e,                            TRUE,   FALSE,
7090     EL_BALLOON_SWITCH_RIGHT,            -1, -1
7091   },
7092   {
7093     Xwind_s,                            TRUE,   FALSE,
7094     EL_BALLOON_SWITCH_DOWN,             -1, -1
7095   },
7096   {
7097     Xwind_w,                            TRUE,   FALSE,
7098     EL_BALLOON_SWITCH_LEFT,             -1, -1
7099   },
7100   {
7101     Xwind_any,                          TRUE,   FALSE,
7102     EL_BALLOON_SWITCH_ANY,              -1, -1
7103   },
7104   {
7105     Xwind_stop,                         TRUE,   FALSE,
7106     EL_BALLOON_SWITCH_NONE,             -1, -1
7107   },
7108
7109   {
7110     Xexit,                              TRUE,   FALSE,
7111     EL_EM_EXIT_CLOSED,                  -1, -1
7112   },
7113   {
7114     Xexit_1,                            TRUE,   FALSE,
7115     EL_EM_EXIT_OPEN,                    -1, -1
7116   },
7117   {
7118     Xexit_2,                            FALSE,  FALSE,
7119     EL_EM_EXIT_OPEN,                    -1, -1
7120   },
7121   {
7122     Xexit_3,                            FALSE,  FALSE,
7123     EL_EM_EXIT_OPEN,                    -1, -1
7124   },
7125
7126   {
7127     Xpause,                             FALSE,  FALSE,
7128     EL_EMPTY,                           -1, -1
7129   },
7130
7131   {
7132     Xwall_1,                            TRUE,   FALSE,
7133     EL_WALL,                            -1, -1
7134   },
7135   {
7136     Xwall_2,                            TRUE,   FALSE,
7137     EL_EMC_WALL_14,                     -1, -1
7138   },
7139   {
7140     Xwall_3,                            TRUE,   FALSE,
7141     EL_EMC_WALL_15,                     -1, -1
7142   },
7143   {
7144     Xwall_4,                            TRUE,   FALSE,
7145     EL_EMC_WALL_16,                     -1, -1
7146   },
7147
7148   {
7149     Xroundwall_1,                       TRUE,   FALSE,
7150     EL_WALL_SLIPPERY,                   -1, -1
7151   },
7152   {
7153     Xroundwall_2,                       TRUE,   FALSE,
7154     EL_EMC_WALL_SLIPPERY_2,             -1, -1
7155   },
7156   {
7157     Xroundwall_3,                       TRUE,   FALSE,
7158     EL_EMC_WALL_SLIPPERY_3,             -1, -1
7159   },
7160   {
7161     Xroundwall_4,                       TRUE,   FALSE,
7162     EL_EMC_WALL_SLIPPERY_4,             -1, -1
7163   },
7164
7165   {
7166     Xsteel_1,                           TRUE,   FALSE,
7167     EL_STEELWALL,                       -1, -1
7168   },
7169   {
7170     Xsteel_2,                           TRUE,   FALSE,
7171     EL_EMC_STEELWALL_2,                 -1, -1
7172   },
7173   {
7174     Xsteel_3,                           TRUE,   FALSE,
7175     EL_EMC_STEELWALL_3,                 -1, -1
7176   },
7177   {
7178     Xsteel_4,                           TRUE,   FALSE,
7179     EL_EMC_STEELWALL_4,                 -1, -1
7180   },
7181
7182   {
7183     Xdecor_1,                           TRUE,   FALSE,
7184     EL_EMC_WALL_8,                      -1, -1
7185   },
7186   {
7187     Xdecor_2,                           TRUE,   FALSE,
7188     EL_EMC_WALL_6,                      -1, -1
7189   },
7190   {
7191     Xdecor_3,                           TRUE,   FALSE,
7192     EL_EMC_WALL_4,                      -1, -1
7193   },
7194   {
7195     Xdecor_4,                           TRUE,   FALSE,
7196     EL_EMC_WALL_7,                      -1, -1
7197   },
7198   {
7199     Xdecor_5,                           TRUE,   FALSE,
7200     EL_EMC_WALL_5,                      -1, -1
7201   },
7202   {
7203     Xdecor_6,                           TRUE,   FALSE,
7204     EL_EMC_WALL_9,                      -1, -1
7205   },
7206   {
7207     Xdecor_7,                           TRUE,   FALSE,
7208     EL_EMC_WALL_10,                     -1, -1
7209   },
7210   {
7211     Xdecor_8,                           TRUE,   FALSE,
7212     EL_EMC_WALL_1,                      -1, -1
7213   },
7214   {
7215     Xdecor_9,                           TRUE,   FALSE,
7216     EL_EMC_WALL_2,                      -1, -1
7217   },
7218   {
7219     Xdecor_10,                          TRUE,   FALSE,
7220     EL_EMC_WALL_3,                      -1, -1
7221   },
7222   {
7223     Xdecor_11,                          TRUE,   FALSE,
7224     EL_EMC_WALL_11,                     -1, -1
7225   },
7226   {
7227     Xdecor_12,                          TRUE,   FALSE,
7228     EL_EMC_WALL_12,                     -1, -1
7229   },
7230
7231   {
7232     Xalpha_0,                           TRUE,   FALSE,
7233     EL_CHAR('0'),                       -1, -1
7234   },
7235   {
7236     Xalpha_1,                           TRUE,   FALSE,
7237     EL_CHAR('1'),                       -1, -1
7238   },
7239   {
7240     Xalpha_2,                           TRUE,   FALSE,
7241     EL_CHAR('2'),                       -1, -1
7242   },
7243   {
7244     Xalpha_3,                           TRUE,   FALSE,
7245     EL_CHAR('3'),                       -1, -1
7246   },
7247   {
7248     Xalpha_4,                           TRUE,   FALSE,
7249     EL_CHAR('4'),                       -1, -1
7250   },
7251   {
7252     Xalpha_5,                           TRUE,   FALSE,
7253     EL_CHAR('5'),                       -1, -1
7254   },
7255   {
7256     Xalpha_6,                           TRUE,   FALSE,
7257     EL_CHAR('6'),                       -1, -1
7258   },
7259   {
7260     Xalpha_7,                           TRUE,   FALSE,
7261     EL_CHAR('7'),                       -1, -1
7262   },
7263   {
7264     Xalpha_8,                           TRUE,   FALSE,
7265     EL_CHAR('8'),                       -1, -1
7266   },
7267   {
7268     Xalpha_9,                           TRUE,   FALSE,
7269     EL_CHAR('9'),                       -1, -1
7270   },
7271   {
7272     Xalpha_excla,                       TRUE,   FALSE,
7273     EL_CHAR('!'),                       -1, -1
7274   },
7275   {
7276     Xalpha_apost,                       TRUE,   FALSE,
7277     EL_CHAR('\''),                      -1, -1
7278   },
7279   {
7280     Xalpha_comma,                       TRUE,   FALSE,
7281     EL_CHAR(','),                       -1, -1
7282   },
7283   {
7284     Xalpha_minus,                       TRUE,   FALSE,
7285     EL_CHAR('-'),                       -1, -1
7286   },
7287   {
7288     Xalpha_perio,                       TRUE,   FALSE,
7289     EL_CHAR('.'),                       -1, -1
7290   },
7291   {
7292     Xalpha_colon,                       TRUE,   FALSE,
7293     EL_CHAR(':'),                       -1, -1
7294   },
7295   {
7296     Xalpha_quest,                       TRUE,   FALSE,
7297     EL_CHAR('?'),                       -1, -1
7298   },
7299   {
7300     Xalpha_a,                           TRUE,   FALSE,
7301     EL_CHAR('A'),                       -1, -1
7302   },
7303   {
7304     Xalpha_b,                           TRUE,   FALSE,
7305     EL_CHAR('B'),                       -1, -1
7306   },
7307   {
7308     Xalpha_c,                           TRUE,   FALSE,
7309     EL_CHAR('C'),                       -1, -1
7310   },
7311   {
7312     Xalpha_d,                           TRUE,   FALSE,
7313     EL_CHAR('D'),                       -1, -1
7314   },
7315   {
7316     Xalpha_e,                           TRUE,   FALSE,
7317     EL_CHAR('E'),                       -1, -1
7318   },
7319   {
7320     Xalpha_f,                           TRUE,   FALSE,
7321     EL_CHAR('F'),                       -1, -1
7322   },
7323   {
7324     Xalpha_g,                           TRUE,   FALSE,
7325     EL_CHAR('G'),                       -1, -1
7326   },
7327   {
7328     Xalpha_h,                           TRUE,   FALSE,
7329     EL_CHAR('H'),                       -1, -1
7330   },
7331   {
7332     Xalpha_i,                           TRUE,   FALSE,
7333     EL_CHAR('I'),                       -1, -1
7334   },
7335   {
7336     Xalpha_j,                           TRUE,   FALSE,
7337     EL_CHAR('J'),                       -1, -1
7338   },
7339   {
7340     Xalpha_k,                           TRUE,   FALSE,
7341     EL_CHAR('K'),                       -1, -1
7342   },
7343   {
7344     Xalpha_l,                           TRUE,   FALSE,
7345     EL_CHAR('L'),                       -1, -1
7346   },
7347   {
7348     Xalpha_m,                           TRUE,   FALSE,
7349     EL_CHAR('M'),                       -1, -1
7350   },
7351   {
7352     Xalpha_n,                           TRUE,   FALSE,
7353     EL_CHAR('N'),                       -1, -1
7354   },
7355   {
7356     Xalpha_o,                           TRUE,   FALSE,
7357     EL_CHAR('O'),                       -1, -1
7358   },
7359   {
7360     Xalpha_p,                           TRUE,   FALSE,
7361     EL_CHAR('P'),                       -1, -1
7362   },
7363   {
7364     Xalpha_q,                           TRUE,   FALSE,
7365     EL_CHAR('Q'),                       -1, -1
7366   },
7367   {
7368     Xalpha_r,                           TRUE,   FALSE,
7369     EL_CHAR('R'),                       -1, -1
7370   },
7371   {
7372     Xalpha_s,                           TRUE,   FALSE,
7373     EL_CHAR('S'),                       -1, -1
7374   },
7375   {
7376     Xalpha_t,                           TRUE,   FALSE,
7377     EL_CHAR('T'),                       -1, -1
7378   },
7379   {
7380     Xalpha_u,                           TRUE,   FALSE,
7381     EL_CHAR('U'),                       -1, -1
7382   },
7383   {
7384     Xalpha_v,                           TRUE,   FALSE,
7385     EL_CHAR('V'),                       -1, -1
7386   },
7387   {
7388     Xalpha_w,                           TRUE,   FALSE,
7389     EL_CHAR('W'),                       -1, -1
7390   },
7391   {
7392     Xalpha_x,                           TRUE,   FALSE,
7393     EL_CHAR('X'),                       -1, -1
7394   },
7395   {
7396     Xalpha_y,                           TRUE,   FALSE,
7397     EL_CHAR('Y'),                       -1, -1
7398   },
7399   {
7400     Xalpha_z,                           TRUE,   FALSE,
7401     EL_CHAR('Z'),                       -1, -1
7402   },
7403   {
7404     Xalpha_arrow_e,                     TRUE,   FALSE,
7405     EL_CHAR('>'),                       -1, -1
7406   },
7407   {
7408     Xalpha_arrow_w,                     TRUE,   FALSE,
7409     EL_CHAR('<'),                       -1, -1
7410   },
7411   {
7412     Xalpha_copyr,                       TRUE,   FALSE,
7413     EL_CHAR(CHAR_BYTE_COPYRIGHT),       -1, -1
7414   },
7415
7416   {
7417     Ykey_1_blank,                       FALSE,  FALSE,
7418     EL_EM_KEY_1,                        ACTION_COLLECTING, -1
7419   },
7420   {
7421     Ykey_2_blank,                       FALSE,  FALSE,
7422     EL_EM_KEY_2,                        ACTION_COLLECTING, -1
7423   },
7424   {
7425     Ykey_3_blank,                       FALSE,  FALSE,
7426     EL_EM_KEY_3,                        ACTION_COLLECTING, -1
7427   },
7428   {
7429     Ykey_4_blank,                       FALSE,  FALSE,
7430     EL_EM_KEY_4,                        ACTION_COLLECTING, -1
7431   },
7432   {
7433     Ykey_5_blank,                       FALSE,  FALSE,
7434     EL_EMC_KEY_5,                       ACTION_COLLECTING, -1
7435   },
7436   {
7437     Ykey_6_blank,                       FALSE,  FALSE,
7438     EL_EMC_KEY_6,                       ACTION_COLLECTING, -1
7439   },
7440   {
7441     Ykey_7_blank,                       FALSE,  FALSE,
7442     EL_EMC_KEY_7,                       ACTION_COLLECTING, -1
7443   },
7444   {
7445     Ykey_8_blank,                       FALSE,  FALSE,
7446     EL_EMC_KEY_8,                       ACTION_COLLECTING, -1
7447   },
7448   {
7449     Ylenses_blank,                      FALSE,  FALSE,
7450     EL_EMC_LENSES,                      ACTION_COLLECTING, -1
7451   },
7452   {
7453     Ymagnify_blank,                     FALSE,  FALSE,
7454     EL_EMC_MAGNIFIER,                   ACTION_COLLECTING, -1
7455   },
7456   {
7457     Ygrass_blank,                       FALSE,  FALSE,
7458     EL_EMC_GRASS,                       ACTION_SNAPPING, -1
7459   },
7460   {
7461     Ydirt_blank,                        FALSE,  FALSE,
7462     EL_SAND,                            ACTION_SNAPPING, -1
7463   },
7464
7465   {
7466     -1,                                 FALSE,  FALSE,
7467     -1,                                 -1, -1
7468   }
7469 };
7470
7471 static struct Mapping_EM_to_RND_player
7472 {
7473   int action_em;
7474   int player_nr;
7475
7476   int element_rnd;
7477   int action;
7478   int direction;
7479 }
7480 em_player_mapping_list[MAX_PLAYERS * PLY_MAX + 1] =
7481 {
7482   {
7483     PLY_walk_n,                         0,
7484     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_UP,
7485   },
7486   {
7487     PLY_walk_e,                         0,
7488     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_RIGHT,
7489   },
7490   {
7491     PLY_walk_s,                         0,
7492     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_DOWN,
7493   },
7494   {
7495     PLY_walk_w,                         0,
7496     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_LEFT,
7497   },
7498   {
7499     PLY_push_n,                         0,
7500     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_UP,
7501   },
7502   {
7503     PLY_push_e,                         0,
7504     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_RIGHT,
7505   },
7506   {
7507     PLY_push_s,                         0,
7508     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_DOWN,
7509   },
7510   {
7511     PLY_push_w,                         0,
7512     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_LEFT,
7513   },
7514   {
7515     PLY_shoot_n,                        0,
7516     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_UP,
7517   },
7518   {
7519     PLY_shoot_e,                        0,
7520     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7521   },
7522   {
7523     PLY_shoot_s,                        0,
7524     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_DOWN,
7525   },
7526   {
7527     PLY_shoot_w,                        0,
7528     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_LEFT,
7529   },
7530   {
7531     PLY_walk_n,                         1,
7532     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_UP,
7533   },
7534   {
7535     PLY_walk_e,                         1,
7536     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_RIGHT,
7537   },
7538   {
7539     PLY_walk_s,                         1,
7540     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_DOWN,
7541   },
7542   {
7543     PLY_walk_w,                         1,
7544     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_LEFT,
7545   },
7546   {
7547     PLY_push_n,                         1,
7548     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_UP,
7549   },
7550   {
7551     PLY_push_e,                         1,
7552     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_RIGHT,
7553   },
7554   {
7555     PLY_push_s,                         1,
7556     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_DOWN,
7557   },
7558   {
7559     PLY_push_w,                         1,
7560     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_LEFT,
7561   },
7562   {
7563     PLY_shoot_n,                        1,
7564     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_UP,
7565   },
7566   {
7567     PLY_shoot_e,                        1,
7568     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7569   },
7570   {
7571     PLY_shoot_s,                        1,
7572     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_DOWN,
7573   },
7574   {
7575     PLY_shoot_w,                        1,
7576     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_LEFT,
7577   },
7578   {
7579     PLY_still,                          0,
7580     EL_PLAYER_1,                        ACTION_DEFAULT, -1,
7581   },
7582   {
7583     PLY_still,                          1,
7584     EL_PLAYER_2,                        ACTION_DEFAULT, -1,
7585   },
7586   {
7587     PLY_walk_n,                         2,
7588     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_UP,
7589   },
7590   {
7591     PLY_walk_e,                         2,
7592     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_RIGHT,
7593   },
7594   {
7595     PLY_walk_s,                         2,
7596     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_DOWN,
7597   },
7598   {
7599     PLY_walk_w,                         2,
7600     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_LEFT,
7601   },
7602   {
7603     PLY_push_n,                         2,
7604     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_UP,
7605   },
7606   {
7607     PLY_push_e,                         2,
7608     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_RIGHT,
7609   },
7610   {
7611     PLY_push_s,                         2,
7612     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_DOWN,
7613   },
7614   {
7615     PLY_push_w,                         2,
7616     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_LEFT,
7617   },
7618   {
7619     PLY_shoot_n,                        2,
7620     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_UP,
7621   },
7622   {
7623     PLY_shoot_e,                        2,
7624     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7625   },
7626   {
7627     PLY_shoot_s,                        2,
7628     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_DOWN,
7629   },
7630   {
7631     PLY_shoot_w,                        2,
7632     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_LEFT,
7633   },
7634   {
7635     PLY_walk_n,                         3,
7636     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_UP,
7637   },
7638   {
7639     PLY_walk_e,                         3,
7640     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_RIGHT,
7641   },
7642   {
7643     PLY_walk_s,                         3,
7644     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_DOWN,
7645   },
7646   {
7647     PLY_walk_w,                         3,
7648     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_LEFT,
7649   },
7650   {
7651     PLY_push_n,                         3,
7652     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_UP,
7653   },
7654   {
7655     PLY_push_e,                         3,
7656     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_RIGHT,
7657   },
7658   {
7659     PLY_push_s,                         3,
7660     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_DOWN,
7661   },
7662   {
7663     PLY_push_w,                         3,
7664     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_LEFT,
7665   },
7666   {
7667     PLY_shoot_n,                        3,
7668     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_UP,
7669   },
7670   {
7671     PLY_shoot_e,                        3,
7672     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7673   },
7674   {
7675     PLY_shoot_s,                        3,
7676     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_DOWN,
7677   },
7678   {
7679     PLY_shoot_w,                        3,
7680     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_LEFT,
7681   },
7682   {
7683     PLY_still,                          2,
7684     EL_PLAYER_3,                        ACTION_DEFAULT, -1,
7685   },
7686   {
7687     PLY_still,                          3,
7688     EL_PLAYER_4,                        ACTION_DEFAULT, -1,
7689   },
7690
7691   {
7692     -1,                                 -1,
7693     -1,                                 -1, -1
7694   }
7695 };
7696
7697 int map_element_RND_to_EM_cave(int element_rnd)
7698 {
7699   static unsigned short mapping_RND_to_EM[NUM_FILE_ELEMENTS];
7700   static boolean mapping_initialized = FALSE;
7701
7702   if (!mapping_initialized)
7703   {
7704     int i;
7705
7706     // return "Xalpha_quest" for all undefined elements in mapping array
7707     for (i = 0; i < NUM_FILE_ELEMENTS; i++)
7708       mapping_RND_to_EM[i] = Xalpha_quest;
7709
7710     for (i = 0; em_object_mapping_list[i].element_em != -1; i++)
7711       if (em_object_mapping_list[i].is_rnd_to_em_mapping)
7712         mapping_RND_to_EM[em_object_mapping_list[i].element_rnd] =
7713           em_object_mapping_list[i].element_em;
7714
7715     mapping_initialized = TRUE;
7716   }
7717
7718   if (element_rnd < 0 || element_rnd >= NUM_FILE_ELEMENTS)
7719   {
7720     Warn("invalid RND level element %d", element_rnd);
7721
7722     return EL_UNKNOWN;
7723   }
7724
7725   return map_em_element_X_to_C(mapping_RND_to_EM[element_rnd]);
7726 }
7727
7728 int map_element_EM_to_RND_cave(int element_em_cave)
7729 {
7730   static unsigned short mapping_EM_to_RND[GAME_TILE_MAX];
7731   static boolean mapping_initialized = FALSE;
7732
7733   if (!mapping_initialized)
7734   {
7735     int i;
7736
7737     // return "EL_UNKNOWN" for all undefined elements in mapping array
7738     for (i = 0; i < GAME_TILE_MAX; i++)
7739       mapping_EM_to_RND[i] = EL_UNKNOWN;
7740
7741     for (i = 0; em_object_mapping_list[i].element_em != -1; i++)
7742       mapping_EM_to_RND[em_object_mapping_list[i].element_em] =
7743         em_object_mapping_list[i].element_rnd;
7744
7745     mapping_initialized = TRUE;
7746   }
7747
7748   if (element_em_cave < 0 || element_em_cave >= CAVE_TILE_MAX)
7749   {
7750     Warn("invalid EM cave element %d", element_em_cave);
7751
7752     return EL_UNKNOWN;
7753   }
7754
7755   return mapping_EM_to_RND[map_em_element_C_to_X(element_em_cave)];
7756 }
7757
7758 int map_element_EM_to_RND_game(int element_em_game)
7759 {
7760   static unsigned short mapping_EM_to_RND[GAME_TILE_MAX];
7761   static boolean mapping_initialized = FALSE;
7762
7763   if (!mapping_initialized)
7764   {
7765     int i;
7766
7767     // return "EL_UNKNOWN" for all undefined elements in mapping array
7768     for (i = 0; i < GAME_TILE_MAX; i++)
7769       mapping_EM_to_RND[i] = EL_UNKNOWN;
7770
7771     for (i = 0; em_object_mapping_list[i].element_em != -1; i++)
7772       mapping_EM_to_RND[em_object_mapping_list[i].element_em] =
7773         em_object_mapping_list[i].element_rnd;
7774
7775     mapping_initialized = TRUE;
7776   }
7777
7778   if (element_em_game < 0 || element_em_game >= GAME_TILE_MAX)
7779   {
7780     Warn("invalid EM game element %d", element_em_game);
7781
7782     return EL_UNKNOWN;
7783   }
7784
7785   return mapping_EM_to_RND[element_em_game];
7786 }
7787
7788 void map_android_clone_elements_RND_to_EM(struct LevelInfo *level)
7789 {
7790   struct LevelInfo_EM *level_em = level->native_em_level;
7791   struct CAVE *cav = level_em->cav;
7792   int i, j;
7793
7794   for (i = 0; i < GAME_TILE_MAX; i++)
7795     cav->android_array[i] = Cblank;
7796
7797   for (i = 0; i < level->num_android_clone_elements; i++)
7798   {
7799     int element_rnd = level->android_clone_element[i];
7800     int element_em_cave = map_element_RND_to_EM_cave(element_rnd);
7801
7802     for (j = 0; em_object_mapping_list[j].element_em != -1; j++)
7803       if (em_object_mapping_list[j].element_rnd == element_rnd)
7804         cav->android_array[em_object_mapping_list[j].element_em] =
7805           element_em_cave;
7806   }
7807 }
7808
7809 void map_android_clone_elements_EM_to_RND(struct LevelInfo *level)
7810 {
7811   struct LevelInfo_EM *level_em = level->native_em_level;
7812   struct CAVE *cav = level_em->cav;
7813   int i, j;
7814
7815   level->num_android_clone_elements = 0;
7816
7817   for (i = 0; i < GAME_TILE_MAX; i++)
7818   {
7819     int element_em_cave = cav->android_array[i];
7820     int element_rnd;
7821     boolean element_found = FALSE;
7822
7823     if (element_em_cave == Cblank)
7824       continue;
7825
7826     element_rnd = map_element_EM_to_RND_cave(element_em_cave);
7827
7828     for (j = 0; j < level->num_android_clone_elements; j++)
7829       if (level->android_clone_element[j] == element_rnd)
7830         element_found = TRUE;
7831
7832     if (!element_found)
7833     {
7834       level->android_clone_element[level->num_android_clone_elements++] =
7835         element_rnd;
7836
7837       if (level->num_android_clone_elements == MAX_ANDROID_ELEMENTS)
7838         break;
7839     }
7840   }
7841
7842   if (level->num_android_clone_elements == 0)
7843   {
7844     level->num_android_clone_elements = 1;
7845     level->android_clone_element[0] = EL_EMPTY;
7846   }
7847 }
7848
7849 int map_direction_RND_to_EM(int direction)
7850 {
7851   return (direction == MV_UP    ? 0 :
7852           direction == MV_RIGHT ? 1 :
7853           direction == MV_DOWN  ? 2 :
7854           direction == MV_LEFT  ? 3 :
7855           -1);
7856 }
7857
7858 int map_direction_EM_to_RND(int direction)
7859 {
7860   return (direction == 0 ? MV_UP    :
7861           direction == 1 ? MV_RIGHT :
7862           direction == 2 ? MV_DOWN  :
7863           direction == 3 ? MV_LEFT  :
7864           MV_NONE);
7865 }
7866
7867 int map_element_RND_to_SP(int element_rnd)
7868 {
7869   int element_sp = 0x20;        // map unknown elements to yellow "hardware"
7870
7871   if (element_rnd >= EL_SP_START &&
7872       element_rnd <= EL_SP_END)
7873     element_sp = element_rnd - EL_SP_START;
7874   else if (element_rnd == EL_EMPTY_SPACE)
7875     element_sp = 0x00;
7876   else if (element_rnd == EL_INVISIBLE_WALL)
7877     element_sp = 0x28;
7878
7879   return element_sp;
7880 }
7881
7882 int map_element_SP_to_RND(int element_sp)
7883 {
7884   int element_rnd = EL_UNKNOWN;
7885
7886   if (element_sp >= 0x00 &&
7887       element_sp <= 0x27)
7888     element_rnd = EL_SP_START + element_sp;
7889   else if (element_sp == 0x28)
7890     element_rnd = EL_INVISIBLE_WALL;
7891
7892   return element_rnd;
7893 }
7894
7895 int map_action_SP_to_RND(int action_sp)
7896 {
7897   switch (action_sp)
7898   {
7899     case actActive:             return ACTION_ACTIVE;
7900     case actImpact:             return ACTION_IMPACT;
7901     case actExploding:          return ACTION_EXPLODING;
7902     case actDigging:            return ACTION_DIGGING;
7903     case actSnapping:           return ACTION_SNAPPING;
7904     case actCollecting:         return ACTION_COLLECTING;
7905     case actPassing:            return ACTION_PASSING;
7906     case actPushing:            return ACTION_PUSHING;
7907     case actDropping:           return ACTION_DROPPING;
7908
7909     default:                    return ACTION_DEFAULT;
7910   }
7911 }
7912
7913 int map_element_RND_to_MM(int element_rnd)
7914 {
7915   return (element_rnd >= EL_MM_START_1 &&
7916           element_rnd <= EL_MM_END_1 ?
7917           EL_MM_START_1_NATIVE + element_rnd - EL_MM_START_1 :
7918
7919           element_rnd >= EL_MM_START_2 &&
7920           element_rnd <= EL_MM_END_2 ?
7921           EL_MM_START_2_NATIVE + element_rnd - EL_MM_START_2 :
7922
7923           element_rnd >= EL_CHAR_START &&
7924           element_rnd <= EL_CHAR_END ?
7925           EL_MM_CHAR_START_NATIVE + element_rnd - EL_CHAR_START :
7926
7927           element_rnd >= EL_MM_RUNTIME_START &&
7928           element_rnd <= EL_MM_RUNTIME_END ?
7929           EL_MM_RUNTIME_START_NATIVE + element_rnd - EL_MM_RUNTIME_START :
7930
7931           element_rnd >= EL_MM_DUMMY_START &&
7932           element_rnd <= EL_MM_DUMMY_END ?
7933           EL_MM_DUMMY_START_NATIVE + element_rnd - EL_MM_DUMMY_START :
7934
7935           EL_MM_EMPTY_NATIVE);
7936 }
7937
7938 int map_element_MM_to_RND(int element_mm)
7939 {
7940   return (element_mm == EL_MM_EMPTY_NATIVE ||
7941           element_mm == EL_DF_EMPTY_NATIVE ?
7942           EL_EMPTY :
7943
7944           element_mm >= EL_MM_START_1_NATIVE &&
7945           element_mm <= EL_MM_END_1_NATIVE ?
7946           EL_MM_START_1 + element_mm - EL_MM_START_1_NATIVE :
7947
7948           element_mm >= EL_MM_START_2_NATIVE &&
7949           element_mm <= EL_MM_END_2_NATIVE ?
7950           EL_MM_START_2 + element_mm - EL_MM_START_2_NATIVE :
7951
7952           element_mm >= EL_MM_CHAR_START_NATIVE &&
7953           element_mm <= EL_MM_CHAR_END_NATIVE ?
7954           EL_CHAR_START + element_mm - EL_MM_CHAR_START_NATIVE :
7955
7956           element_mm >= EL_MM_RUNTIME_START_NATIVE &&
7957           element_mm <= EL_MM_RUNTIME_END_NATIVE ?
7958           EL_MM_RUNTIME_START + element_mm - EL_MM_RUNTIME_START_NATIVE :
7959
7960           element_mm >= EL_MM_DUMMY_START_NATIVE &&
7961           element_mm <= EL_MM_DUMMY_END_NATIVE ?
7962           EL_MM_DUMMY_START + element_mm - EL_MM_DUMMY_START_NATIVE :
7963
7964           EL_EMPTY);
7965 }
7966
7967 int map_action_MM_to_RND(int action_mm)
7968 {
7969   // all MM actions are defined to exactly match their RND counterparts
7970   return action_mm;
7971 }
7972
7973 int map_sound_MM_to_RND(int sound_mm)
7974 {
7975   switch (sound_mm)
7976   {
7977     case SND_MM_GAME_LEVELTIME_CHARGING:
7978       return SND_GAME_LEVELTIME_CHARGING;
7979
7980     case SND_MM_GAME_HEALTH_CHARGING:
7981       return SND_GAME_HEALTH_CHARGING;
7982
7983     default:
7984       return SND_UNDEFINED;
7985   }
7986 }
7987
7988 int map_mm_wall_element(int element)
7989 {
7990   return (element >= EL_MM_STEEL_WALL_START &&
7991           element <= EL_MM_STEEL_WALL_END ?
7992           EL_MM_STEEL_WALL :
7993
7994           element >= EL_MM_WOODEN_WALL_START &&
7995           element <= EL_MM_WOODEN_WALL_END ?
7996           EL_MM_WOODEN_WALL :
7997
7998           element >= EL_MM_ICE_WALL_START &&
7999           element <= EL_MM_ICE_WALL_END ?
8000           EL_MM_ICE_WALL :
8001
8002           element >= EL_MM_AMOEBA_WALL_START &&
8003           element <= EL_MM_AMOEBA_WALL_END ?
8004           EL_MM_AMOEBA_WALL :
8005
8006           element >= EL_DF_STEEL_WALL_START &&
8007           element <= EL_DF_STEEL_WALL_END ?
8008           EL_DF_STEEL_WALL :
8009
8010           element >= EL_DF_WOODEN_WALL_START &&
8011           element <= EL_DF_WOODEN_WALL_END ?
8012           EL_DF_WOODEN_WALL :
8013
8014           element);
8015 }
8016
8017 int map_mm_wall_element_editor(int element)
8018 {
8019   switch (element)
8020   {
8021     case EL_MM_STEEL_WALL:      return EL_MM_STEEL_WALL_START;
8022     case EL_MM_WOODEN_WALL:     return EL_MM_WOODEN_WALL_START;
8023     case EL_MM_ICE_WALL:        return EL_MM_ICE_WALL_START;
8024     case EL_MM_AMOEBA_WALL:     return EL_MM_AMOEBA_WALL_START;
8025     case EL_DF_STEEL_WALL:      return EL_DF_STEEL_WALL_START;
8026     case EL_DF_WOODEN_WALL:     return EL_DF_WOODEN_WALL_START;
8027
8028     default:                    return element;
8029   }
8030 }
8031
8032 int get_next_element(int element)
8033 {
8034   switch (element)
8035   {
8036     case EL_QUICKSAND_FILLING:          return EL_QUICKSAND_FULL;
8037     case EL_QUICKSAND_EMPTYING:         return EL_QUICKSAND_EMPTY;
8038     case EL_QUICKSAND_FAST_FILLING:     return EL_QUICKSAND_FAST_FULL;
8039     case EL_QUICKSAND_FAST_EMPTYING:    return EL_QUICKSAND_FAST_EMPTY;
8040     case EL_MAGIC_WALL_FILLING:         return EL_MAGIC_WALL_FULL;
8041     case EL_MAGIC_WALL_EMPTYING:        return EL_MAGIC_WALL_ACTIVE;
8042     case EL_BD_MAGIC_WALL_FILLING:      return EL_BD_MAGIC_WALL_FULL;
8043     case EL_BD_MAGIC_WALL_EMPTYING:     return EL_BD_MAGIC_WALL_ACTIVE;
8044     case EL_DC_MAGIC_WALL_FILLING:      return EL_DC_MAGIC_WALL_FULL;
8045     case EL_DC_MAGIC_WALL_EMPTYING:     return EL_DC_MAGIC_WALL_ACTIVE;
8046     case EL_AMOEBA_DROPPING:            return EL_AMOEBA_WET;
8047
8048     default:                            return element;
8049   }
8050 }
8051
8052 int el2img_mm(int element_mm)
8053 {
8054   return el2img(map_element_MM_to_RND(element_mm));
8055 }
8056
8057 int el_act_dir2img(int element, int action, int direction)
8058 {
8059   element = GFX_ELEMENT(element);
8060   direction = MV_DIR_TO_BIT(direction); // default: MV_NONE => MV_DOWN
8061
8062   // direction_graphic[][] == graphic[] for undefined direction graphics
8063   return element_info[element].direction_graphic[action][direction];
8064 }
8065
8066 static int el_act_dir2crm(int element, int action, int direction)
8067 {
8068   element = GFX_ELEMENT(element);
8069   direction = MV_DIR_TO_BIT(direction); // default: MV_NONE => MV_DOWN
8070
8071   // direction_graphic[][] == graphic[] for undefined direction graphics
8072   return element_info[element].direction_crumbled[action][direction];
8073 }
8074
8075 int el_act2img(int element, int action)
8076 {
8077   element = GFX_ELEMENT(element);
8078
8079   return element_info[element].graphic[action];
8080 }
8081
8082 int el_act2crm(int element, int action)
8083 {
8084   element = GFX_ELEMENT(element);
8085
8086   return element_info[element].crumbled[action];
8087 }
8088
8089 int el_dir2img(int element, int direction)
8090 {
8091   element = GFX_ELEMENT(element);
8092
8093   return el_act_dir2img(element, ACTION_DEFAULT, direction);
8094 }
8095
8096 int el2baseimg(int element)
8097 {
8098   return element_info[element].graphic[ACTION_DEFAULT];
8099 }
8100
8101 int el2img(int element)
8102 {
8103   element = GFX_ELEMENT(element);
8104
8105   return element_info[element].graphic[ACTION_DEFAULT];
8106 }
8107
8108 int el2edimg(int element)
8109 {
8110   element = GFX_ELEMENT(element);
8111
8112   return element_info[element].special_graphic[GFX_SPECIAL_ARG_EDITOR];
8113 }
8114
8115 int el2preimg(int element)
8116 {
8117   element = GFX_ELEMENT(element);
8118
8119   return element_info[element].special_graphic[GFX_SPECIAL_ARG_PREVIEW];
8120 }
8121
8122 int el2panelimg(int element)
8123 {
8124   element = GFX_ELEMENT(element);
8125
8126   return element_info[element].special_graphic[GFX_SPECIAL_ARG_PANEL];
8127 }
8128
8129 int font2baseimg(int font_nr)
8130 {
8131   return font_info[font_nr].special_graphic[GFX_SPECIAL_ARG_DEFAULT];
8132 }
8133
8134 int getBeltNrFromBeltElement(int element)
8135 {
8136   return (element < EL_CONVEYOR_BELT_2_LEFT ? 0 :
8137           element < EL_CONVEYOR_BELT_3_LEFT ? 1 :
8138           element < EL_CONVEYOR_BELT_4_LEFT ? 2 : 3);
8139 }
8140
8141 int getBeltNrFromBeltActiveElement(int element)
8142 {
8143   return (element < EL_CONVEYOR_BELT_2_LEFT_ACTIVE ? 0 :
8144           element < EL_CONVEYOR_BELT_3_LEFT_ACTIVE ? 1 :
8145           element < EL_CONVEYOR_BELT_4_LEFT_ACTIVE ? 2 : 3);
8146 }
8147
8148 int getBeltNrFromBeltSwitchElement(int element)
8149 {
8150   return (element < EL_CONVEYOR_BELT_2_SWITCH_LEFT ? 0 :
8151           element < EL_CONVEYOR_BELT_3_SWITCH_LEFT ? 1 :
8152           element < EL_CONVEYOR_BELT_4_SWITCH_LEFT ? 2 : 3);
8153 }
8154
8155 int getBeltDirNrFromBeltElement(int element)
8156 {
8157   static int belt_base_element[4] =
8158   {
8159     EL_CONVEYOR_BELT_1_LEFT,
8160     EL_CONVEYOR_BELT_2_LEFT,
8161     EL_CONVEYOR_BELT_3_LEFT,
8162     EL_CONVEYOR_BELT_4_LEFT
8163   };
8164
8165   int belt_nr = getBeltNrFromBeltElement(element);
8166   int belt_dir_nr = element - belt_base_element[belt_nr];
8167
8168   return (belt_dir_nr % 3);
8169 }
8170
8171 int getBeltDirNrFromBeltSwitchElement(int element)
8172 {
8173   static int belt_base_element[4] =
8174   {
8175     EL_CONVEYOR_BELT_1_SWITCH_LEFT,
8176     EL_CONVEYOR_BELT_2_SWITCH_LEFT,
8177     EL_CONVEYOR_BELT_3_SWITCH_LEFT,
8178     EL_CONVEYOR_BELT_4_SWITCH_LEFT
8179   };
8180
8181   int belt_nr = getBeltNrFromBeltSwitchElement(element);
8182   int belt_dir_nr = element - belt_base_element[belt_nr];
8183
8184   return (belt_dir_nr % 3);
8185 }
8186
8187 int getBeltDirFromBeltElement(int element)
8188 {
8189   static int belt_move_dir[3] =
8190   {
8191     MV_LEFT,
8192     MV_NONE,
8193     MV_RIGHT
8194   };
8195
8196   int belt_dir_nr = getBeltDirNrFromBeltElement(element);
8197
8198   return belt_move_dir[belt_dir_nr];
8199 }
8200
8201 int getBeltDirFromBeltSwitchElement(int element)
8202 {
8203   static int belt_move_dir[3] =
8204   {
8205     MV_LEFT,
8206     MV_NONE,
8207     MV_RIGHT
8208   };
8209
8210   int belt_dir_nr = getBeltDirNrFromBeltSwitchElement(element);
8211
8212   return belt_move_dir[belt_dir_nr];
8213 }
8214
8215 int getBeltElementFromBeltNrAndBeltDirNr(int belt_nr, int belt_dir_nr)
8216 {
8217   static int belt_base_element[4] =
8218   {
8219     EL_CONVEYOR_BELT_1_LEFT,
8220     EL_CONVEYOR_BELT_2_LEFT,
8221     EL_CONVEYOR_BELT_3_LEFT,
8222     EL_CONVEYOR_BELT_4_LEFT
8223   };
8224
8225   return belt_base_element[belt_nr] + belt_dir_nr;
8226 }
8227
8228 int getBeltElementFromBeltNrAndBeltDir(int belt_nr, int belt_dir)
8229 {
8230   int belt_dir_nr = (belt_dir == MV_LEFT ? 0 : belt_dir == MV_RIGHT ? 2 : 1);
8231
8232   return getBeltElementFromBeltNrAndBeltDirNr(belt_nr, belt_dir_nr);
8233 }
8234
8235 int getBeltSwitchElementFromBeltNrAndBeltDirNr(int belt_nr, int belt_dir_nr)
8236 {
8237   static int belt_base_element[4] =
8238   {
8239     EL_CONVEYOR_BELT_1_SWITCH_LEFT,
8240     EL_CONVEYOR_BELT_2_SWITCH_LEFT,
8241     EL_CONVEYOR_BELT_3_SWITCH_LEFT,
8242     EL_CONVEYOR_BELT_4_SWITCH_LEFT
8243   };
8244
8245   return belt_base_element[belt_nr] + belt_dir_nr;
8246 }
8247
8248 int getBeltSwitchElementFromBeltNrAndBeltDir(int belt_nr, int belt_dir)
8249 {
8250   int belt_dir_nr = (belt_dir == MV_LEFT ? 0 : belt_dir == MV_RIGHT ? 2 : 1);
8251
8252   return getBeltSwitchElementFromBeltNrAndBeltDirNr(belt_nr, belt_dir_nr);
8253 }
8254
8255 boolean swapTiles_EM(boolean is_pre_emc_cave)
8256 {
8257   return is_pre_emc_cave && leveldir_current->use_emc_tiles;
8258 }
8259
8260 boolean getTeamMode_EM(void)
8261 {
8262   return game.team_mode || network_playing;
8263 }
8264
8265 boolean isActivePlayer_EM(int player_nr)
8266 {
8267   return stored_player[player_nr].active;
8268 }
8269
8270 unsigned int InitRND(int seed)
8271 {
8272   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
8273     return InitEngineRandom_EM(seed);
8274   else if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
8275     return InitEngineRandom_SP(seed);
8276   else if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
8277     return InitEngineRandom_MM(seed);
8278   else
8279     return InitEngineRandom_RND(seed);
8280 }
8281
8282 static struct Mapping_EM_to_RND_object object_mapping[GAME_TILE_MAX];
8283 static struct Mapping_EM_to_RND_player player_mapping[MAX_PLAYERS][PLY_MAX];
8284
8285 static int get_effective_element_EM(int tile, int frame_em)
8286 {
8287   int element             = object_mapping[tile].element_rnd;
8288   int action              = object_mapping[tile].action;
8289   boolean is_backside     = object_mapping[tile].is_backside;
8290   boolean action_removing = (action == ACTION_DIGGING ||
8291                              action == ACTION_SNAPPING ||
8292                              action == ACTION_COLLECTING);
8293
8294   if (frame_em < 7)
8295   {
8296     switch (tile)
8297     {
8298       case Xsplash_e:
8299       case Xsplash_w:
8300         return (frame_em > 5 ? EL_EMPTY : element);
8301
8302       default:
8303         return element;
8304     }
8305   }
8306   else  // frame_em == 7
8307   {
8308     switch (tile)
8309     {
8310       case Xsplash_e:
8311       case Xsplash_w:
8312         return EL_EMPTY;
8313
8314       case Ynut_stone:
8315         return EL_EMERALD;
8316
8317       case Ydiamond_stone:
8318         return EL_ROCK;
8319
8320       case Xdrip_stretch:
8321       case Xdrip_stretchB:
8322       case Ydrip_1_s:
8323       case Ydrip_1_sB:
8324       case Yball_1:
8325       case Xball_2:
8326       case Yball_2:
8327       case Yball_blank:
8328       case Ykey_1_blank:
8329       case Ykey_2_blank:
8330       case Ykey_3_blank:
8331       case Ykey_4_blank:
8332       case Ykey_5_blank:
8333       case Ykey_6_blank:
8334       case Ykey_7_blank:
8335       case Ykey_8_blank:
8336       case Ylenses_blank:
8337       case Ymagnify_blank:
8338       case Ygrass_blank:
8339       case Ydirt_blank:
8340       case Xsand_stonein_1:
8341       case Xsand_stonein_2:
8342       case Xsand_stonein_3:
8343       case Xsand_stonein_4:
8344         return element;
8345
8346       default:
8347         return (is_backside || action_removing ? EL_EMPTY : element);
8348     }
8349   }
8350 }
8351
8352 static boolean check_linear_animation_EM(int tile)
8353 {
8354   switch (tile)
8355   {
8356     case Xsand_stonesand_1:
8357     case Xsand_stonesand_quickout_1:
8358     case Xsand_sandstone_1:
8359     case Xsand_stonein_1:
8360     case Xsand_stoneout_1:
8361     case Xboom_1:
8362     case Xdynamite_1:
8363     case Ybug_w_n:
8364     case Ybug_n_e:
8365     case Ybug_e_s:
8366     case Ybug_s_w:
8367     case Ybug_e_n:
8368     case Ybug_s_e:
8369     case Ybug_w_s:
8370     case Ybug_n_w:
8371     case Ytank_w_n:
8372     case Ytank_n_e:
8373     case Ytank_e_s:
8374     case Ytank_s_w:
8375     case Ytank_e_n:
8376     case Ytank_s_e:
8377     case Ytank_w_s:
8378     case Ytank_n_w:
8379     case Xsplash_e:
8380     case Xsplash_w:
8381     case Ynut_stone:
8382       return TRUE;
8383   }
8384
8385   return FALSE;
8386 }
8387
8388 static void set_crumbled_graphics_EM(struct GraphicInfo_EM *g_em,
8389                                      boolean has_crumbled_graphics,
8390                                      int crumbled, int sync_frame)
8391 {
8392   // if element can be crumbled, but certain action graphics are just empty
8393   // space (like instantly snapping sand to empty space in 1 frame), do not
8394   // treat these empty space graphics as crumbled graphics in EMC engine
8395   if (crumbled == IMG_EMPTY_SPACE)
8396     has_crumbled_graphics = FALSE;
8397
8398   if (has_crumbled_graphics)
8399   {
8400     struct GraphicInfo *g_crumbled = &graphic_info[crumbled];
8401     int frame_crumbled = getAnimationFrame(g_crumbled->anim_frames,
8402                                            g_crumbled->anim_delay,
8403                                            g_crumbled->anim_mode,
8404                                            g_crumbled->anim_start_frame,
8405                                            sync_frame);
8406
8407     getGraphicSource(crumbled, frame_crumbled, &g_em->crumbled_bitmap,
8408                      &g_em->crumbled_src_x, &g_em->crumbled_src_y);
8409
8410     g_em->crumbled_border_size = graphic_info[crumbled].border_size;
8411     g_em->crumbled_tile_size = graphic_info[crumbled].tile_size;
8412
8413     g_em->has_crumbled_graphics = TRUE;
8414   }
8415   else
8416   {
8417     g_em->crumbled_bitmap = NULL;
8418     g_em->crumbled_src_x = 0;
8419     g_em->crumbled_src_y = 0;
8420     g_em->crumbled_border_size = 0;
8421     g_em->crumbled_tile_size = 0;
8422
8423     g_em->has_crumbled_graphics = FALSE;
8424   }
8425 }
8426
8427 #if 0
8428 void ResetGfxAnimation_EM(int x, int y, int tile)
8429 {
8430   GfxFrame[x][y] = 0;
8431 }
8432 #endif
8433
8434 void SetGfxAnimation_EM(struct GraphicInfo_EM *g_em,
8435                         int tile, int frame_em, int x, int y)
8436 {
8437   int action = object_mapping[tile].action;
8438   int direction = object_mapping[tile].direction;
8439   int effective_element = get_effective_element_EM(tile, frame_em);
8440   int graphic = (direction == MV_NONE ?
8441                  el_act2img(effective_element, action) :
8442                  el_act_dir2img(effective_element, action, direction));
8443   struct GraphicInfo *g = &graphic_info[graphic];
8444   int sync_frame;
8445   boolean action_removing = (action == ACTION_DIGGING ||
8446                              action == ACTION_SNAPPING ||
8447                              action == ACTION_COLLECTING);
8448   boolean action_moving   = (action == ACTION_FALLING ||
8449                              action == ACTION_MOVING ||
8450                              action == ACTION_PUSHING ||
8451                              action == ACTION_EATING ||
8452                              action == ACTION_FILLING ||
8453                              action == ACTION_EMPTYING);
8454   boolean action_falling  = (action == ACTION_FALLING ||
8455                              action == ACTION_FILLING ||
8456                              action == ACTION_EMPTYING);
8457
8458   // special case: graphic uses "2nd movement tile" and has defined
8459   // 7 frames for movement animation (or less) => use default graphic
8460   // for last (8th) frame which ends the movement animation
8461   if (g->double_movement && g->anim_frames < 8 && frame_em == 7)
8462   {
8463     action = ACTION_DEFAULT;    // (keep action_* unchanged for now)
8464     graphic = (direction == MV_NONE ?
8465                el_act2img(effective_element, action) :
8466                el_act_dir2img(effective_element, action, direction));
8467
8468     g = &graphic_info[graphic];
8469   }
8470
8471   if ((action_removing || check_linear_animation_EM(tile)) && frame_em == 0)
8472   {
8473     GfxFrame[x][y] = 0;
8474   }
8475   else if (action_moving)
8476   {
8477     boolean is_backside = object_mapping[tile].is_backside;
8478
8479     if (is_backside)
8480     {
8481       int direction = object_mapping[tile].direction;
8482       int move_dir = (action_falling ? MV_DOWN : direction);
8483
8484       GfxFrame[x][y]++;
8485
8486 #if 1
8487       // !!! TEST !!! NEW !!! DOES NOT WORK RIGHT YET !!!
8488       if (g->double_movement && frame_em == 0)
8489         GfxFrame[x][y] = 0;
8490 #endif
8491
8492       if (move_dir == MV_LEFT)
8493         GfxFrame[x - 1][y] = GfxFrame[x][y];
8494       else if (move_dir == MV_RIGHT)
8495         GfxFrame[x + 1][y] = GfxFrame[x][y];
8496       else if (move_dir == MV_UP)
8497         GfxFrame[x][y - 1] = GfxFrame[x][y];
8498       else if (move_dir == MV_DOWN)
8499         GfxFrame[x][y + 1] = GfxFrame[x][y];
8500     }
8501   }
8502   else
8503   {
8504     GfxFrame[x][y]++;
8505
8506     // special case: animation for Xsand_stonesand_quickout_1/2 twice as fast
8507     if (tile == Xsand_stonesand_quickout_1 ||
8508         tile == Xsand_stonesand_quickout_2)
8509       GfxFrame[x][y]++;
8510   }
8511
8512   if (graphic_info[graphic].anim_global_sync)
8513     sync_frame = FrameCounter;
8514   else if (IN_FIELD(x, y, MAX_LEV_FIELDX, MAX_LEV_FIELDY))
8515     sync_frame = GfxFrame[x][y];
8516   else
8517     sync_frame = 0;     // playfield border (pseudo steel)
8518
8519   SetRandomAnimationValue(x, y);
8520
8521   int frame = getAnimationFrame(g->anim_frames,
8522                                 g->anim_delay,
8523                                 g->anim_mode,
8524                                 g->anim_start_frame,
8525                                 sync_frame);
8526
8527   g_em->unique_identifier =
8528     (graphic << 16) | ((frame % 8) << 12) | (g_em->width << 6) | g_em->height;
8529 }
8530
8531 void getGraphicSourceObjectExt_EM(struct GraphicInfo_EM *g_em,
8532                                   int tile, int frame_em, int x, int y)
8533 {
8534   int action = object_mapping[tile].action;
8535   int direction = object_mapping[tile].direction;
8536   boolean is_backside = object_mapping[tile].is_backside;
8537   int effective_element = get_effective_element_EM(tile, frame_em);
8538   int effective_action = action;
8539   int graphic = (direction == MV_NONE ?
8540                  el_act2img(effective_element, effective_action) :
8541                  el_act_dir2img(effective_element, effective_action,
8542                                 direction));
8543   int crumbled = (direction == MV_NONE ?
8544                   el_act2crm(effective_element, effective_action) :
8545                   el_act_dir2crm(effective_element, effective_action,
8546                                  direction));
8547   int base_graphic = el_act2img(effective_element, ACTION_DEFAULT);
8548   int base_crumbled = el_act2crm(effective_element, ACTION_DEFAULT);
8549   boolean has_crumbled_graphics = (base_crumbled != base_graphic);
8550   struct GraphicInfo *g = &graphic_info[graphic];
8551   int sync_frame;
8552
8553   // special case: graphic uses "2nd movement tile" and has defined
8554   // 7 frames for movement animation (or less) => use default graphic
8555   // for last (8th) frame which ends the movement animation
8556   if (g->double_movement && g->anim_frames < 8 && frame_em == 7)
8557   {
8558     effective_action = ACTION_DEFAULT;
8559     graphic = (direction == MV_NONE ?
8560                el_act2img(effective_element, effective_action) :
8561                el_act_dir2img(effective_element, effective_action,
8562                               direction));
8563     crumbled = (direction == MV_NONE ?
8564                 el_act2crm(effective_element, effective_action) :
8565                 el_act_dir2crm(effective_element, effective_action,
8566                                direction));
8567
8568     g = &graphic_info[graphic];
8569   }
8570
8571   if (graphic_info[graphic].anim_global_sync)
8572     sync_frame = FrameCounter;
8573   else if (IN_FIELD(x, y, MAX_LEV_FIELDX, MAX_LEV_FIELDY))
8574     sync_frame = GfxFrame[x][y];
8575   else
8576     sync_frame = 0;     // playfield border (pseudo steel)
8577
8578   SetRandomAnimationValue(x, y);
8579
8580   int frame = getAnimationFrame(g->anim_frames,
8581                                 g->anim_delay,
8582                                 g->anim_mode,
8583                                 g->anim_start_frame,
8584                                 sync_frame);
8585
8586   getGraphicSourceExt(graphic, frame, &g_em->bitmap, &g_em->src_x, &g_em->src_y,
8587                       g->double_movement && is_backside);
8588
8589   // (updating the "crumbled" graphic definitions is probably not really needed,
8590   // as animations for crumbled graphics can't be longer than one EMC cycle)
8591   set_crumbled_graphics_EM(g_em, has_crumbled_graphics, crumbled,
8592                            sync_frame);
8593 }
8594
8595 void getGraphicSourcePlayerExt_EM(struct GraphicInfo_EM *g_em,
8596                                   int player_nr, int anim, int frame_em)
8597 {
8598   int element   = player_mapping[player_nr][anim].element_rnd;
8599   int action    = player_mapping[player_nr][anim].action;
8600   int direction = player_mapping[player_nr][anim].direction;
8601   int graphic = (direction == MV_NONE ?
8602                  el_act2img(element, action) :
8603                  el_act_dir2img(element, action, direction));
8604   struct GraphicInfo *g = &graphic_info[graphic];
8605   int sync_frame;
8606
8607   InitPlayerGfxAnimation(&stored_player[player_nr], action, direction);
8608
8609   stored_player[player_nr].StepFrame = frame_em;
8610
8611   sync_frame = stored_player[player_nr].Frame;
8612
8613   int frame = getAnimationFrame(g->anim_frames,
8614                                 g->anim_delay,
8615                                 g->anim_mode,
8616                                 g->anim_start_frame,
8617                                 sync_frame);
8618
8619   getGraphicSourceExt(graphic, frame, &g_em->bitmap,
8620                       &g_em->src_x, &g_em->src_y, FALSE);
8621 }
8622
8623 void InitGraphicInfo_EM(void)
8624 {
8625   int i, j, p;
8626
8627   // always start with reliable default values
8628   for (i = 0; i < GAME_TILE_MAX; i++)
8629   {
8630     object_mapping[i].element_rnd = EL_UNKNOWN;
8631     object_mapping[i].is_backside = FALSE;
8632     object_mapping[i].action = ACTION_DEFAULT;
8633     object_mapping[i].direction = MV_NONE;
8634   }
8635
8636   // always start with reliable default values
8637   for (p = 0; p < MAX_PLAYERS; p++)
8638   {
8639     for (i = 0; i < PLY_MAX; i++)
8640     {
8641       player_mapping[p][i].element_rnd = EL_UNKNOWN;
8642       player_mapping[p][i].action = ACTION_DEFAULT;
8643       player_mapping[p][i].direction = MV_NONE;
8644     }
8645   }
8646
8647   for (i = 0; em_object_mapping_list[i].element_em != -1; i++)
8648   {
8649     int e = em_object_mapping_list[i].element_em;
8650
8651     object_mapping[e].element_rnd = em_object_mapping_list[i].element_rnd;
8652     object_mapping[e].is_backside = em_object_mapping_list[i].is_backside;
8653
8654     if (em_object_mapping_list[i].action != -1)
8655       object_mapping[e].action = em_object_mapping_list[i].action;
8656
8657     if (em_object_mapping_list[i].direction != -1)
8658       object_mapping[e].direction =
8659         MV_DIR_FROM_BIT(em_object_mapping_list[i].direction);
8660   }
8661
8662   for (i = 0; em_player_mapping_list[i].action_em != -1; i++)
8663   {
8664     int a = em_player_mapping_list[i].action_em;
8665     int p = em_player_mapping_list[i].player_nr;
8666
8667     player_mapping[p][a].element_rnd = em_player_mapping_list[i].element_rnd;
8668
8669     if (em_player_mapping_list[i].action != -1)
8670       player_mapping[p][a].action = em_player_mapping_list[i].action;
8671
8672     if (em_player_mapping_list[i].direction != -1)
8673       player_mapping[p][a].direction =
8674         MV_DIR_FROM_BIT(em_player_mapping_list[i].direction);
8675   }
8676
8677   for (i = 0; i < GAME_TILE_MAX; i++)
8678   {
8679     int element = object_mapping[i].element_rnd;
8680     int action = object_mapping[i].action;
8681     int direction = object_mapping[i].direction;
8682     boolean is_backside = object_mapping[i].is_backside;
8683     boolean action_exploding = ((action == ACTION_EXPLODING ||
8684                                  action == ACTION_SMASHED_BY_ROCK ||
8685                                  action == ACTION_SMASHED_BY_SPRING) &&
8686                                 element != EL_DIAMOND);
8687     boolean action_active = (action == ACTION_ACTIVE);
8688     boolean action_other = (action == ACTION_OTHER);
8689
8690     for (j = 0; j < 8; j++)
8691     {
8692       int effective_element = get_effective_element_EM(i, j);
8693       int effective_action = (j < 7 ? action :
8694                               i == Xdrip_stretch ? action :
8695                               i == Xdrip_stretchB ? action :
8696                               i == Ydrip_1_s ? action :
8697                               i == Ydrip_1_sB ? action :
8698                               i == Yball_1 ? action :
8699                               i == Xball_2 ? action :
8700                               i == Yball_2 ? action :
8701                               i == Yball_blank ? action :
8702                               i == Ykey_1_blank ? action :
8703                               i == Ykey_2_blank ? action :
8704                               i == Ykey_3_blank ? action :
8705                               i == Ykey_4_blank ? action :
8706                               i == Ykey_5_blank ? action :
8707                               i == Ykey_6_blank ? action :
8708                               i == Ykey_7_blank ? action :
8709                               i == Ykey_8_blank ? action :
8710                               i == Ylenses_blank ? action :
8711                               i == Ymagnify_blank ? action :
8712                               i == Ygrass_blank ? action :
8713                               i == Ydirt_blank ? action :
8714                               i == Xsand_stonein_1 ? action :
8715                               i == Xsand_stonein_2 ? action :
8716                               i == Xsand_stonein_3 ? action :
8717                               i == Xsand_stonein_4 ? action :
8718                               i == Xsand_stoneout_1 ? action :
8719                               i == Xsand_stoneout_2 ? action :
8720                               i == Xboom_android ? ACTION_EXPLODING :
8721                               action_exploding ? ACTION_EXPLODING :
8722                               action_active ? action :
8723                               action_other ? action :
8724                               ACTION_DEFAULT);
8725       int graphic = (el_act_dir2img(effective_element, effective_action,
8726                                     direction));
8727       int crumbled = (el_act_dir2crm(effective_element, effective_action,
8728                                      direction));
8729       int base_graphic = el_act2img(effective_element, ACTION_DEFAULT);
8730       int base_crumbled = el_act2crm(effective_element, ACTION_DEFAULT);
8731       boolean has_action_graphics = (graphic != base_graphic);
8732       boolean has_crumbled_graphics = (base_crumbled != base_graphic);
8733       struct GraphicInfo *g = &graphic_info[graphic];
8734       struct GraphicInfo_EM *g_em = &graphic_info_em_object[i][j];
8735       Bitmap *src_bitmap;
8736       int src_x, src_y;
8737       // ensure to get symmetric 3-frame, 2-delay animations as used in EM
8738       boolean special_animation = (action != ACTION_DEFAULT &&
8739                                    g->anim_frames == 3 &&
8740                                    g->anim_delay == 2 &&
8741                                    g->anim_mode & ANIM_LINEAR);
8742       int sync_frame = (i == Xdrip_stretch ? 7 :
8743                         i == Xdrip_stretchB ? 7 :
8744                         i == Ydrip_2_s ? j + 8 :
8745                         i == Ydrip_2_sB ? j + 8 :
8746                         i == Xacid_1 ? 0 :
8747                         i == Xacid_2 ? 10 :
8748                         i == Xacid_3 ? 20 :
8749                         i == Xacid_4 ? 30 :
8750                         i == Xacid_5 ? 40 :
8751                         i == Xacid_6 ? 50 :
8752                         i == Xacid_7 ? 60 :
8753                         i == Xacid_8 ? 70 :
8754                         i == Xfake_acid_1 ? 0 :
8755                         i == Xfake_acid_2 ? 10 :
8756                         i == Xfake_acid_3 ? 20 :
8757                         i == Xfake_acid_4 ? 30 :
8758                         i == Xfake_acid_5 ? 40 :
8759                         i == Xfake_acid_6 ? 50 :
8760                         i == Xfake_acid_7 ? 60 :
8761                         i == Xfake_acid_8 ? 70 :
8762                         i == Xball_2 ? 7 :
8763                         i == Yball_2 ? j + 8 :
8764                         i == Yball_blank ? j + 1 :
8765                         i == Ykey_1_blank ? j + 1 :
8766                         i == Ykey_2_blank ? j + 1 :
8767                         i == Ykey_3_blank ? j + 1 :
8768                         i == Ykey_4_blank ? j + 1 :
8769                         i == Ykey_5_blank ? j + 1 :
8770                         i == Ykey_6_blank ? j + 1 :
8771                         i == Ykey_7_blank ? j + 1 :
8772                         i == Ykey_8_blank ? j + 1 :
8773                         i == Ylenses_blank ? j + 1 :
8774                         i == Ymagnify_blank ? j + 1 :
8775                         i == Ygrass_blank ? j + 1 :
8776                         i == Ydirt_blank ? j + 1 :
8777                         i == Xamoeba_1 ? 0 :
8778                         i == Xamoeba_2 ? 1 :
8779                         i == Xamoeba_3 ? 2 :
8780                         i == Xamoeba_4 ? 3 :
8781                         i == Xamoeba_5 ? 0 :
8782                         i == Xamoeba_6 ? 1 :
8783                         i == Xamoeba_7 ? 2 :
8784                         i == Xamoeba_8 ? 3 :
8785                         i == Xexit_2 ? j + 8 :
8786                         i == Xexit_3 ? j + 16 :
8787                         i == Xdynamite_1 ? 0 :
8788                         i == Xdynamite_2 ? 8 :
8789                         i == Xdynamite_3 ? 16 :
8790                         i == Xdynamite_4 ? 24 :
8791                         i == Xsand_stonein_1 ? j + 1 :
8792                         i == Xsand_stonein_2 ? j + 9 :
8793                         i == Xsand_stonein_3 ? j + 17 :
8794                         i == Xsand_stonein_4 ? j + 25 :
8795                         i == Xsand_stoneout_1 && j == 0 ? 0 :
8796                         i == Xsand_stoneout_1 && j == 1 ? 0 :
8797                         i == Xsand_stoneout_1 && j == 2 ? 1 :
8798                         i == Xsand_stoneout_1 && j == 3 ? 2 :
8799                         i == Xsand_stoneout_1 && j == 4 ? 2 :
8800                         i == Xsand_stoneout_1 && j == 5 ? 3 :
8801                         i == Xsand_stoneout_1 && j == 6 ? 4 :
8802                         i == Xsand_stoneout_1 && j == 7 ? 4 :
8803                         i == Xsand_stoneout_2 && j == 0 ? 5 :
8804                         i == Xsand_stoneout_2 && j == 1 ? 6 :
8805                         i == Xsand_stoneout_2 && j == 2 ? 7 :
8806                         i == Xsand_stoneout_2 && j == 3 ? 8 :
8807                         i == Xsand_stoneout_2 && j == 4 ? 9 :
8808                         i == Xsand_stoneout_2 && j == 5 ? 11 :
8809                         i == Xsand_stoneout_2 && j == 6 ? 13 :
8810                         i == Xsand_stoneout_2 && j == 7 ? 15 :
8811                         i == Xboom_bug && j == 1 ? 2 :
8812                         i == Xboom_bug && j == 2 ? 2 :
8813                         i == Xboom_bug && j == 3 ? 4 :
8814                         i == Xboom_bug && j == 4 ? 4 :
8815                         i == Xboom_bug && j == 5 ? 2 :
8816                         i == Xboom_bug && j == 6 ? 2 :
8817                         i == Xboom_bug && j == 7 ? 0 :
8818                         i == Xboom_tank && j == 1 ? 2 :
8819                         i == Xboom_tank && j == 2 ? 2 :
8820                         i == Xboom_tank && j == 3 ? 4 :
8821                         i == Xboom_tank && j == 4 ? 4 :
8822                         i == Xboom_tank && j == 5 ? 2 :
8823                         i == Xboom_tank && j == 6 ? 2 :
8824                         i == Xboom_tank && j == 7 ? 0 :
8825                         i == Xboom_android && j == 7 ? 6 :
8826                         i == Xboom_1 && j == 1 ? 2 :
8827                         i == Xboom_1 && j == 2 ? 2 :
8828                         i == Xboom_1 && j == 3 ? 4 :
8829                         i == Xboom_1 && j == 4 ? 4 :
8830                         i == Xboom_1 && j == 5 ? 6 :
8831                         i == Xboom_1 && j == 6 ? 6 :
8832                         i == Xboom_1 && j == 7 ? 8 :
8833                         i == Xboom_2 && j == 0 ? 8 :
8834                         i == Xboom_2 && j == 1 ? 8 :
8835                         i == Xboom_2 && j == 2 ? 10 :
8836                         i == Xboom_2 && j == 3 ? 10 :
8837                         i == Xboom_2 && j == 4 ? 10 :
8838                         i == Xboom_2 && j == 5 ? 12 :
8839                         i == Xboom_2 && j == 6 ? 12 :
8840                         i == Xboom_2 && j == 7 ? 12 :
8841                         special_animation && j == 4 ? 3 :
8842                         effective_action != action ? 0 :
8843                         j);
8844       int frame = getAnimationFrame(g->anim_frames,
8845                                     g->anim_delay,
8846                                     g->anim_mode,
8847                                     g->anim_start_frame,
8848                                     sync_frame);
8849
8850       getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y,
8851                           g->double_movement && is_backside);
8852
8853       g_em->bitmap = src_bitmap;
8854       g_em->src_x = src_x;
8855       g_em->src_y = src_y;
8856       g_em->src_offset_x = 0;
8857       g_em->src_offset_y = 0;
8858       g_em->dst_offset_x = 0;
8859       g_em->dst_offset_y = 0;
8860       g_em->width  = TILEX;
8861       g_em->height = TILEY;
8862
8863       g_em->preserve_background = FALSE;
8864
8865       set_crumbled_graphics_EM(g_em, has_crumbled_graphics, crumbled,
8866                                sync_frame);
8867
8868       if ((!g->double_movement && (effective_action == ACTION_FALLING ||
8869                                    effective_action == ACTION_MOVING  ||
8870                                    effective_action == ACTION_PUSHING ||
8871                                    effective_action == ACTION_EATING)) ||
8872           (!has_action_graphics && (effective_action == ACTION_FILLING ||
8873                                     effective_action == ACTION_EMPTYING)))
8874       {
8875         int move_dir =
8876           (effective_action == ACTION_FALLING ||
8877            effective_action == ACTION_FILLING ||
8878            effective_action == ACTION_EMPTYING ? MV_DOWN : direction);
8879         int dx = (move_dir == MV_LEFT ? -1 : move_dir == MV_RIGHT ? 1 : 0);
8880         int dy = (move_dir == MV_UP   ? -1 : move_dir == MV_DOWN  ? 1 : 0);
8881         int num_steps = (i == Ydrip_1_s  ? 16 :
8882                          i == Ydrip_1_sB ? 16 :
8883                          i == Ydrip_2_s  ? 16 :
8884                          i == Ydrip_2_sB ? 16 :
8885                          i == Xsand_stonein_1 ? 32 :
8886                          i == Xsand_stonein_2 ? 32 :
8887                          i == Xsand_stonein_3 ? 32 :
8888                          i == Xsand_stonein_4 ? 32 :
8889                          i == Xsand_stoneout_1 ? 16 :
8890                          i == Xsand_stoneout_2 ? 16 : 8);
8891         int cx = ABS(dx) * (TILEX / num_steps);
8892         int cy = ABS(dy) * (TILEY / num_steps);
8893         int step_frame = (i == Ydrip_2_s        ? j + 8 :
8894                           i == Ydrip_2_sB       ? j + 8 :
8895                           i == Xsand_stonein_2  ? j + 8 :
8896                           i == Xsand_stonein_3  ? j + 16 :
8897                           i == Xsand_stonein_4  ? j + 24 :
8898                           i == Xsand_stoneout_2 ? j + 8 : j) + 1;
8899         int step = (is_backside ? step_frame : num_steps - step_frame);
8900
8901         if (is_backside)        // tile where movement starts
8902         {
8903           if (dx < 0 || dy < 0)
8904           {
8905             g_em->src_offset_x = cx * step;
8906             g_em->src_offset_y = cy * step;
8907           }
8908           else
8909           {
8910             g_em->dst_offset_x = cx * step;
8911             g_em->dst_offset_y = cy * step;
8912           }
8913         }
8914         else                    // tile where movement ends
8915         {
8916           if (dx < 0 || dy < 0)
8917           {
8918             g_em->dst_offset_x = cx * step;
8919             g_em->dst_offset_y = cy * step;
8920           }
8921           else
8922           {
8923             g_em->src_offset_x = cx * step;
8924             g_em->src_offset_y = cy * step;
8925           }
8926         }
8927
8928         g_em->width  = TILEX - cx * step;
8929         g_em->height = TILEY - cy * step;
8930       }
8931
8932       // create unique graphic identifier to decide if tile must be redrawn
8933       /* bit 31 - 16 (16 bit): EM style graphic
8934          bit 15 - 12 ( 4 bit): EM style frame
8935          bit 11 -  6 ( 6 bit): graphic width
8936          bit  5 -  0 ( 6 bit): graphic height */
8937       g_em->unique_identifier =
8938         (graphic << 16) | (frame << 12) | (g_em->width << 6) | g_em->height;
8939     }
8940   }
8941
8942   for (i = 0; i < GAME_TILE_MAX; i++)
8943   {
8944     for (j = 0; j < 8; j++)
8945     {
8946       int element = object_mapping[i].element_rnd;
8947       int action = object_mapping[i].action;
8948       int direction = object_mapping[i].direction;
8949       boolean is_backside = object_mapping[i].is_backside;
8950       int graphic_action  = el_act_dir2img(element, action, direction);
8951       int graphic_default = el_act_dir2img(element, ACTION_DEFAULT, direction);
8952
8953       if ((action == ACTION_SMASHED_BY_ROCK ||
8954            action == ACTION_SMASHED_BY_SPRING ||
8955            action == ACTION_EATING) &&
8956           graphic_action == graphic_default)
8957       {
8958         int e = (action == ACTION_SMASHED_BY_ROCK   ? Ystone_s  :
8959                  action == ACTION_SMASHED_BY_SPRING ? Yspring_s :
8960                  direction == MV_LEFT  ? (is_backside? Yspring_wB: Yspring_w) :
8961                  direction == MV_RIGHT ? (is_backside? Yspring_eB: Yspring_e) :
8962                  Xspring);
8963
8964         // no separate animation for "smashed by rock" -- use rock instead
8965         struct GraphicInfo_EM *g_em = &graphic_info_em_object[i][j];
8966         struct GraphicInfo_EM *g_xx = &graphic_info_em_object[e][j];
8967
8968         g_em->bitmap            = g_xx->bitmap;
8969         g_em->src_x             = g_xx->src_x;
8970         g_em->src_y             = g_xx->src_y;
8971         g_em->src_offset_x      = g_xx->src_offset_x;
8972         g_em->src_offset_y      = g_xx->src_offset_y;
8973         g_em->dst_offset_x      = g_xx->dst_offset_x;
8974         g_em->dst_offset_y      = g_xx->dst_offset_y;
8975         g_em->width             = g_xx->width;
8976         g_em->height            = g_xx->height;
8977         g_em->unique_identifier = g_xx->unique_identifier;
8978
8979         if (!is_backside)
8980           g_em->preserve_background = TRUE;
8981       }
8982     }
8983   }
8984
8985   for (p = 0; p < MAX_PLAYERS; p++)
8986   {
8987     for (i = 0; i < PLY_MAX; i++)
8988     {
8989       int element = player_mapping[p][i].element_rnd;
8990       int action = player_mapping[p][i].action;
8991       int direction = player_mapping[p][i].direction;
8992
8993       for (j = 0; j < 8; j++)
8994       {
8995         int effective_element = element;
8996         int effective_action = action;
8997         int graphic = (direction == MV_NONE ?
8998                        el_act2img(effective_element, effective_action) :
8999                        el_act_dir2img(effective_element, effective_action,
9000                                       direction));
9001         struct GraphicInfo *g = &graphic_info[graphic];
9002         struct GraphicInfo_EM *g_em = &graphic_info_em_player[p][i][j];
9003         Bitmap *src_bitmap;
9004         int src_x, src_y;
9005         int sync_frame = j;
9006         int frame = getAnimationFrame(g->anim_frames,
9007                                       g->anim_delay,
9008                                       g->anim_mode,
9009                                       g->anim_start_frame,
9010                                       sync_frame);
9011
9012         getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y, FALSE);
9013
9014         g_em->bitmap = src_bitmap;
9015         g_em->src_x = src_x;
9016         g_em->src_y = src_y;
9017         g_em->src_offset_x = 0;
9018         g_em->src_offset_y = 0;
9019         g_em->dst_offset_x = 0;
9020         g_em->dst_offset_y = 0;
9021         g_em->width  = TILEX;
9022         g_em->height = TILEY;
9023       }
9024     }
9025   }
9026 }
9027
9028 static void CheckSaveEngineSnapshot_EM(byte action[MAX_PLAYERS], int frame,
9029                                        boolean any_player_moving,
9030                                        boolean any_player_snapping,
9031                                        boolean any_player_dropping)
9032 {
9033   if (frame == 7 && !any_player_dropping)
9034   {
9035     if (!local_player->was_waiting)
9036     {
9037       if (!CheckSaveEngineSnapshotToList())
9038         return;
9039
9040       local_player->was_waiting = TRUE;
9041     }
9042   }
9043   else if (any_player_moving || any_player_snapping || any_player_dropping)
9044   {
9045     local_player->was_waiting = FALSE;
9046   }
9047 }
9048
9049 static void CheckSaveEngineSnapshot_SP(boolean murphy_is_waiting,
9050                                        boolean murphy_is_dropping)
9051 {
9052   if (murphy_is_waiting)
9053   {
9054     if (!local_player->was_waiting)
9055     {
9056       if (!CheckSaveEngineSnapshotToList())
9057         return;
9058
9059       local_player->was_waiting = TRUE;
9060     }
9061   }
9062   else
9063   {
9064     local_player->was_waiting = FALSE;
9065   }
9066 }
9067
9068 static void CheckSaveEngineSnapshot_MM(boolean element_clicked,
9069                                        boolean button_released)
9070 {
9071   if (button_released)
9072   {
9073     if (game.snapshot.mode == SNAPSHOT_MODE_EVERY_MOVE)
9074       CheckSaveEngineSnapshotToList();
9075   }
9076   else if (element_clicked)
9077   {
9078     if (game.snapshot.mode != SNAPSHOT_MODE_EVERY_MOVE)
9079       CheckSaveEngineSnapshotToList();
9080
9081     game.snapshot.changed_action = TRUE;
9082   }
9083 }
9084
9085 boolean CheckSingleStepMode_EM(byte action[MAX_PLAYERS], int frame,
9086                                boolean any_player_moving,
9087                                boolean any_player_snapping,
9088                                boolean any_player_dropping)
9089 {
9090   if (tape.single_step && tape.recording && !tape.pausing)
9091     if (frame == 7 && !any_player_dropping)
9092       TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
9093
9094   CheckSaveEngineSnapshot_EM(action, frame, any_player_moving,
9095                              any_player_snapping, any_player_dropping);
9096
9097   return tape.pausing;
9098 }
9099
9100 void CheckSingleStepMode_SP(boolean murphy_is_waiting,
9101                             boolean murphy_is_dropping)
9102 {
9103   boolean murphy_starts_dropping = FALSE;
9104   int i;
9105
9106   for (i = 0; i < MAX_PLAYERS; i++)
9107     if (stored_player[i].force_dropping)
9108       murphy_starts_dropping = TRUE;
9109
9110   if (tape.single_step && tape.recording && !tape.pausing)
9111     if (murphy_is_waiting && !murphy_starts_dropping)
9112       TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
9113
9114   CheckSaveEngineSnapshot_SP(murphy_is_waiting, murphy_is_dropping);
9115 }
9116
9117 void CheckSingleStepMode_MM(boolean element_clicked,
9118                             boolean button_released)
9119 {
9120   if (tape.single_step && tape.recording && !tape.pausing)
9121     if (button_released)
9122       TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
9123
9124   CheckSaveEngineSnapshot_MM(element_clicked, button_released);
9125 }
9126
9127 void getGraphicSource_SP(struct GraphicInfo_SP *g_sp,
9128                          int graphic, int sync_frame, int x, int y)
9129 {
9130   int frame = getGraphicAnimationFrame(graphic, sync_frame);
9131
9132   getGraphicSource(graphic, frame, &g_sp->bitmap, &g_sp->src_x, &g_sp->src_y);
9133 }
9134
9135 boolean isNextAnimationFrame_SP(int graphic, int sync_frame)
9136 {
9137   return (IS_NEXT_FRAME(sync_frame, graphic));
9138 }
9139
9140 int getGraphicInfo_Delay(int graphic)
9141 {
9142   return graphic_info[graphic].anim_delay;
9143 }
9144
9145 void PlayMenuSoundExt(int sound)
9146 {
9147   if (sound == SND_UNDEFINED)
9148     return;
9149
9150   if ((!setup.sound_simple && !IS_LOOP_SOUND(sound)) ||
9151       (!setup.sound_loops && IS_LOOP_SOUND(sound)))
9152     return;
9153
9154   if (IS_LOOP_SOUND(sound))
9155     PlaySoundLoop(sound);
9156   else
9157     PlaySound(sound);
9158 }
9159
9160 void PlayMenuSound(void)
9161 {
9162   PlayMenuSoundExt(menu.sound[game_status]);
9163 }
9164
9165 void PlayMenuSoundStereo(int sound, int stereo_position)
9166 {
9167   if (sound == SND_UNDEFINED)
9168     return;
9169
9170   if ((!setup.sound_simple && !IS_LOOP_SOUND(sound)) ||
9171       (!setup.sound_loops && IS_LOOP_SOUND(sound)))
9172     return;
9173
9174   if (IS_LOOP_SOUND(sound))
9175     PlaySoundExt(sound, SOUND_MAX_VOLUME, stereo_position, SND_CTRL_PLAY_LOOP);
9176   else
9177     PlaySoundStereo(sound, stereo_position);
9178 }
9179
9180 void PlayMenuSoundIfLoopExt(int sound)
9181 {
9182   if (sound == SND_UNDEFINED)
9183     return;
9184
9185   if ((!setup.sound_simple && !IS_LOOP_SOUND(sound)) ||
9186       (!setup.sound_loops && IS_LOOP_SOUND(sound)))
9187     return;
9188
9189   if (IS_LOOP_SOUND(sound))
9190     PlaySoundLoop(sound);
9191 }
9192
9193 void PlayMenuSoundIfLoop(void)
9194 {
9195   PlayMenuSoundIfLoopExt(menu.sound[game_status]);
9196 }
9197
9198 void PlayMenuMusicExt(int music)
9199 {
9200   if (music == MUS_UNDEFINED)
9201     return;
9202
9203   if (!setup.sound_music)
9204     return;
9205
9206   if (IS_LOOP_MUSIC(music))
9207     PlayMusicLoop(music);
9208   else
9209     PlayMusic(music);
9210 }
9211
9212 void PlayMenuMusic(void)
9213 {
9214   char *curr_music = getCurrentlyPlayingMusicFilename();
9215   char *next_music = getMusicInfoEntryFilename(menu.music[game_status]);
9216
9217   if (!strEqual(curr_music, next_music))
9218     PlayMenuMusicExt(menu.music[game_status]);
9219 }
9220
9221 void PlayMenuSoundsAndMusic(void)
9222 {
9223   PlayMenuSound();
9224   PlayMenuMusic();
9225 }
9226
9227 static void FadeMenuSounds(void)
9228 {
9229   FadeSounds();
9230 }
9231
9232 static void FadeMenuMusic(void)
9233 {
9234   char *curr_music = getCurrentlyPlayingMusicFilename();
9235   char *next_music = getMusicInfoEntryFilename(menu.music[game_status]);
9236
9237   if (!strEqual(curr_music, next_music))
9238     FadeMusic();
9239 }
9240
9241 void FadeMenuSoundsAndMusic(void)
9242 {
9243   FadeMenuSounds();
9244   FadeMenuMusic();
9245 }
9246
9247 void PlaySoundActivating(void)
9248 {
9249 #if 0
9250   PlaySound(SND_MENU_ITEM_ACTIVATING);
9251 #endif
9252 }
9253
9254 void PlaySoundSelecting(void)
9255 {
9256 #if 0
9257   PlaySound(SND_MENU_ITEM_SELECTING);
9258 #endif
9259 }
9260
9261 void ToggleFullscreenIfNeeded(void)
9262 {
9263   // if setup and video fullscreen state are already matching, nothing do do
9264   if (setup.fullscreen == video.fullscreen_enabled ||
9265       !video.fullscreen_available)
9266     return;
9267
9268   SDLSetWindowFullscreen(setup.fullscreen);
9269
9270   // set setup value according to successfully changed fullscreen mode
9271   setup.fullscreen = video.fullscreen_enabled;
9272 }
9273
9274 void ChangeWindowScalingIfNeeded(void)
9275 {
9276   // if setup and video window scaling are already matching, nothing do do
9277   if (setup.window_scaling_percent == video.window_scaling_percent ||
9278       video.fullscreen_enabled)
9279     return;
9280
9281   SDLSetWindowScaling(setup.window_scaling_percent);
9282
9283   // set setup value according to successfully changed window scaling
9284   setup.window_scaling_percent = video.window_scaling_percent;
9285 }
9286
9287 void ChangeVsyncModeIfNeeded(void)
9288 {
9289   int setup_vsync_mode = VSYNC_MODE_STR_TO_INT(setup.vsync_mode);
9290   int video_vsync_mode = video.vsync_mode;
9291
9292   // if setup and video vsync mode are already matching, nothing do do
9293   if (setup_vsync_mode == video_vsync_mode)
9294     return;
9295
9296   // if renderer is using OpenGL, vsync mode can directly be changed
9297   SDLSetScreenVsyncMode(setup.vsync_mode);
9298
9299   // if vsync mode unchanged, try re-creating renderer to set vsync mode
9300   if (video.vsync_mode == video_vsync_mode)
9301   {
9302     Bitmap *tmp_backbuffer = CreateBitmap(WIN_XSIZE, WIN_YSIZE, DEFAULT_DEPTH);
9303
9304     // save backbuffer content which gets lost when re-creating screen
9305     BlitBitmap(backbuffer, tmp_backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
9306
9307     // force re-creating screen and renderer to set new vsync mode
9308     video.fullscreen_enabled = !setup.fullscreen;
9309
9310     // when creating new renderer, destroy textures linked to old renderer
9311     FreeAllImageTextures();     // needs old renderer to free the textures
9312
9313     // re-create screen and renderer (including change of vsync mode)
9314     ChangeVideoModeIfNeeded(setup.fullscreen);
9315
9316     // set setup value according to successfully changed fullscreen mode
9317     setup.fullscreen = video.fullscreen_enabled;
9318
9319     // restore backbuffer content from temporary backbuffer backup bitmap
9320     BlitBitmap(tmp_backbuffer, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
9321     FreeBitmap(tmp_backbuffer);
9322
9323     // update visible window/screen
9324     BlitBitmap(backbuffer, window, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
9325
9326     // when changing vsync mode, re-create textures for new renderer
9327     InitImageTextures();
9328   }
9329
9330   // set setup value according to successfully changed vsync mode
9331   setup.vsync_mode = VSYNC_MODE_INT_TO_STR(video.vsync_mode);
9332 }
9333
9334 static void JoinRectangles(int *x, int *y, int *width, int *height,
9335                            int x2, int y2, int width2, int height2)
9336 {
9337   // do not join with "off-screen" rectangle
9338   if (x2 == -1 || y2 == -1)
9339     return;
9340
9341   *x = MIN(*x, x2);
9342   *y = MIN(*y, y2);
9343   *width = MAX(*width, width2);
9344   *height = MAX(*height, height2);
9345 }
9346
9347 void SetAnimStatus(int anim_status_new)
9348 {
9349   if (anim_status_new == GAME_MODE_MAIN)
9350     anim_status_new = GAME_MODE_PSEUDO_MAINONLY;
9351   else if (anim_status_new == GAME_MODE_SCORES)
9352     anim_status_new = GAME_MODE_PSEUDO_SCORESOLD;
9353
9354   global.anim_status_next = anim_status_new;
9355
9356   // directly set screen modes that are entered without fading
9357   if ((global.anim_status      == GAME_MODE_PSEUDO_MAINONLY &&
9358        global.anim_status_next == GAME_MODE_PSEUDO_TYPENAME) ||
9359       (global.anim_status      == GAME_MODE_PSEUDO_TYPENAME &&
9360        global.anim_status_next == GAME_MODE_PSEUDO_MAINONLY))
9361     global.anim_status = global.anim_status_next;
9362 }
9363
9364 void SetGameStatus(int game_status_new)
9365 {
9366   if (game_status_new != game_status)
9367     game_status_last_screen = game_status;
9368
9369   game_status = game_status_new;
9370
9371   SetAnimStatus(game_status_new);
9372 }
9373
9374 void SetFontStatus(int game_status_new)
9375 {
9376   static int last_game_status = -1;
9377
9378   if (game_status_new != -1)
9379   {
9380     // set game status for font use after storing last game status
9381     last_game_status = game_status;
9382     game_status = game_status_new;
9383   }
9384   else
9385   {
9386     // reset game status after font use from last stored game status
9387     game_status = last_game_status;
9388   }
9389 }
9390
9391 void ResetFontStatus(void)
9392 {
9393   SetFontStatus(-1);
9394 }
9395
9396 void SetLevelSetInfo(char *identifier, int level_nr)
9397 {
9398   setString(&levelset.identifier, identifier);
9399
9400   levelset.level_nr = level_nr;
9401 }
9402
9403 boolean CheckIfAllViewportsHaveChanged(void)
9404 {
9405   // if game status has not changed, viewports have not changed either
9406   if (game_status == game_status_last)
9407     return FALSE;
9408
9409   // check if all viewports have changed with current game status
9410
9411   struct RectWithBorder *vp_playfield = &viewport.playfield[game_status];
9412   struct RectWithBorder *vp_door_1    = &viewport.door_1[game_status];
9413   struct RectWithBorder *vp_door_2    = &viewport.door_2[game_status];
9414   int new_real_sx       = vp_playfield->x;
9415   int new_real_sy       = vp_playfield->y;
9416   int new_full_sxsize   = vp_playfield->width;
9417   int new_full_sysize   = vp_playfield->height;
9418   int new_dx            = vp_door_1->x;
9419   int new_dy            = vp_door_1->y;
9420   int new_dxsize        = vp_door_1->width;
9421   int new_dysize        = vp_door_1->height;
9422   int new_vx            = vp_door_2->x;
9423   int new_vy            = vp_door_2->y;
9424   int new_vxsize        = vp_door_2->width;
9425   int new_vysize        = vp_door_2->height;
9426
9427   boolean playfield_viewport_has_changed =
9428     (new_real_sx != REAL_SX ||
9429      new_real_sy != REAL_SY ||
9430      new_full_sxsize != FULL_SXSIZE ||
9431      new_full_sysize != FULL_SYSIZE);
9432
9433   boolean door_1_viewport_has_changed =
9434     (new_dx != DX ||
9435      new_dy != DY ||
9436      new_dxsize != DXSIZE ||
9437      new_dysize != DYSIZE);
9438
9439   boolean door_2_viewport_has_changed =
9440     (new_vx != VX ||
9441      new_vy != VY ||
9442      new_vxsize != VXSIZE ||
9443      new_vysize != VYSIZE ||
9444      game_status_last == GAME_MODE_EDITOR);
9445
9446   return (playfield_viewport_has_changed &&
9447           door_1_viewport_has_changed &&
9448           door_2_viewport_has_changed);
9449 }
9450
9451 boolean CheckFadeAll(void)
9452 {
9453   return (CheckIfGlobalBorderHasChanged() ||
9454           CheckIfAllViewportsHaveChanged());
9455 }
9456
9457 void ChangeViewportPropertiesIfNeeded(void)
9458 {
9459   boolean use_mini_tilesize = (level.game_engine_type == GAME_ENGINE_TYPE_MM ?
9460                                FALSE : setup.small_game_graphics);
9461   int gfx_game_mode = game_status;
9462   int gfx_game_mode2 = (game_status == GAME_MODE_EDITOR ? GAME_MODE_DEFAULT :
9463                         game_status);
9464   struct RectWithBorder *vp_window    = &viewport.window[gfx_game_mode];
9465   struct RectWithBorder *vp_playfield = &viewport.playfield[gfx_game_mode];
9466   struct RectWithBorder *vp_door_1    = &viewport.door_1[gfx_game_mode];
9467   struct RectWithBorder *vp_door_2    = &viewport.door_2[gfx_game_mode2];
9468   struct RectWithBorder *vp_door_3    = &viewport.door_2[GAME_MODE_EDITOR];
9469   int new_win_xsize     = vp_window->width;
9470   int new_win_ysize     = vp_window->height;
9471   int border_left       = vp_playfield->border_left;
9472   int border_right      = vp_playfield->border_right;
9473   int border_top        = vp_playfield->border_top;
9474   int border_bottom     = vp_playfield->border_bottom;
9475   int new_sx            = vp_playfield->x      + border_left;
9476   int new_sy            = vp_playfield->y      + border_top;
9477   int new_sxsize        = vp_playfield->width  - border_left - border_right;
9478   int new_sysize        = vp_playfield->height - border_top  - border_bottom;
9479   int new_real_sx       = vp_playfield->x;
9480   int new_real_sy       = vp_playfield->y;
9481   int new_full_sxsize   = vp_playfield->width;
9482   int new_full_sysize   = vp_playfield->height;
9483   int new_dx            = vp_door_1->x;
9484   int new_dy            = vp_door_1->y;
9485   int new_dxsize        = vp_door_1->width;
9486   int new_dysize        = vp_door_1->height;
9487   int new_vx            = vp_door_2->x;
9488   int new_vy            = vp_door_2->y;
9489   int new_vxsize        = vp_door_2->width;
9490   int new_vysize        = vp_door_2->height;
9491   int new_ex            = vp_door_3->x;
9492   int new_ey            = vp_door_3->y;
9493   int new_exsize        = vp_door_3->width;
9494   int new_eysize        = vp_door_3->height;
9495   int new_tilesize_var = (use_mini_tilesize ? MINI_TILESIZE : game.tile_size);
9496   int tilesize = (gfx_game_mode == GAME_MODE_PLAYING ? new_tilesize_var :
9497                   gfx_game_mode == GAME_MODE_EDITOR ? MINI_TILESIZE : TILESIZE);
9498   int new_scr_fieldx = new_sxsize / tilesize;
9499   int new_scr_fieldy = new_sysize / tilesize;
9500   int new_scr_fieldx_buffers = new_sxsize / new_tilesize_var;
9501   int new_scr_fieldy_buffers = new_sysize / new_tilesize_var;
9502   boolean init_gfx_buffers = FALSE;
9503   boolean init_video_buffer = FALSE;
9504   boolean init_gadgets_and_anims = FALSE;
9505   boolean init_em_graphics = FALSE;
9506
9507   if (new_win_xsize != WIN_XSIZE ||
9508       new_win_ysize != WIN_YSIZE)
9509   {
9510     WIN_XSIZE = new_win_xsize;
9511     WIN_YSIZE = new_win_ysize;
9512
9513     init_video_buffer = TRUE;
9514     init_gfx_buffers = TRUE;
9515     init_gadgets_and_anims = TRUE;
9516
9517     // Debug("tools:viewport", "video: init_video_buffer, init_gfx_buffers");
9518   }
9519
9520   if (new_scr_fieldx != SCR_FIELDX ||
9521       new_scr_fieldy != SCR_FIELDY)
9522   {
9523     // this always toggles between MAIN and GAME when using small tile size
9524
9525     SCR_FIELDX = new_scr_fieldx;
9526     SCR_FIELDY = new_scr_fieldy;
9527
9528     // Debug("tools:viewport", "new_scr_fieldx != SCR_FIELDX ...");
9529   }
9530
9531   if (new_sx != SX ||
9532       new_sy != SY ||
9533       new_dx != DX ||
9534       new_dy != DY ||
9535       new_vx != VX ||
9536       new_vy != VY ||
9537       new_ex != EX ||
9538       new_ey != EY ||
9539       new_sxsize != SXSIZE ||
9540       new_sysize != SYSIZE ||
9541       new_dxsize != DXSIZE ||
9542       new_dysize != DYSIZE ||
9543       new_vxsize != VXSIZE ||
9544       new_vysize != VYSIZE ||
9545       new_exsize != EXSIZE ||
9546       new_eysize != EYSIZE ||
9547       new_real_sx != REAL_SX ||
9548       new_real_sy != REAL_SY ||
9549       new_full_sxsize != FULL_SXSIZE ||
9550       new_full_sysize != FULL_SYSIZE ||
9551       new_tilesize_var != TILESIZE_VAR
9552       )
9553   {
9554     // ------------------------------------------------------------------------
9555     // determine next fading area for changed viewport definitions
9556     // ------------------------------------------------------------------------
9557
9558     // start with current playfield area (default fading area)
9559     FADE_SX = REAL_SX;
9560     FADE_SY = REAL_SY;
9561     FADE_SXSIZE = FULL_SXSIZE;
9562     FADE_SYSIZE = FULL_SYSIZE;
9563
9564     // add new playfield area if position or size has changed
9565     if (new_real_sx != REAL_SX || new_real_sy != REAL_SY ||
9566         new_full_sxsize != FULL_SXSIZE || new_full_sysize != FULL_SYSIZE)
9567     {
9568       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9569                      new_real_sx, new_real_sy, new_full_sxsize,new_full_sysize);
9570     }
9571
9572     // add current and new door 1 area if position or size has changed
9573     if (new_dx != DX || new_dy != DY ||
9574         new_dxsize != DXSIZE || new_dysize != DYSIZE)
9575     {
9576       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9577                      DX, DY, DXSIZE, DYSIZE);
9578       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9579                      new_dx, new_dy, new_dxsize, new_dysize);
9580     }
9581
9582     // add current and new door 2 area if position or size has changed
9583     if (new_vx != VX || new_vy != VY ||
9584         new_vxsize != VXSIZE || new_vysize != VYSIZE)
9585     {
9586       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9587                      VX, VY, VXSIZE, VYSIZE);
9588       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9589                      new_vx, new_vy, new_vxsize, new_vysize);
9590     }
9591
9592     // ------------------------------------------------------------------------
9593     // handle changed tile size
9594     // ------------------------------------------------------------------------
9595
9596     if (new_tilesize_var != TILESIZE_VAR)
9597     {
9598       // Debug("tools:viewport", "new_tilesize_var != TILESIZE_VAR");
9599
9600       // changing tile size invalidates scroll values of engine snapshots
9601       FreeEngineSnapshotSingle();
9602
9603       // changing tile size requires update of graphic mapping for EM engine
9604       init_em_graphics = TRUE;
9605     }
9606
9607     SX = new_sx;
9608     SY = new_sy;
9609     DX = new_dx;
9610     DY = new_dy;
9611     VX = new_vx;
9612     VY = new_vy;
9613     EX = new_ex;
9614     EY = new_ey;
9615     SXSIZE = new_sxsize;
9616     SYSIZE = new_sysize;
9617     DXSIZE = new_dxsize;
9618     DYSIZE = new_dysize;
9619     VXSIZE = new_vxsize;
9620     VYSIZE = new_vysize;
9621     EXSIZE = new_exsize;
9622     EYSIZE = new_eysize;
9623     REAL_SX = new_real_sx;
9624     REAL_SY = new_real_sy;
9625     FULL_SXSIZE = new_full_sxsize;
9626     FULL_SYSIZE = new_full_sysize;
9627     TILESIZE_VAR = new_tilesize_var;
9628
9629     init_gfx_buffers = TRUE;
9630     init_gadgets_and_anims = TRUE;
9631
9632     // Debug("tools:viewport", "viewports: init_gfx_buffers");
9633     // Debug("tools:viewport", "viewports: init_gadgets_and_anims");
9634   }
9635
9636   if (init_gfx_buffers)
9637   {
9638     // Debug("tools:viewport", "init_gfx_buffers");
9639
9640     SCR_FIELDX = new_scr_fieldx_buffers;
9641     SCR_FIELDY = new_scr_fieldy_buffers;
9642
9643     InitGfxBuffers();
9644
9645     SCR_FIELDX = new_scr_fieldx;
9646     SCR_FIELDY = new_scr_fieldy;
9647
9648     SetDrawDeactivationMask(REDRAW_NONE);
9649     SetDrawBackgroundMask(REDRAW_FIELD);
9650   }
9651
9652   if (init_video_buffer)
9653   {
9654     // Debug("tools:viewport", "init_video_buffer");
9655
9656     FreeAllImageTextures();     // needs old renderer to free the textures
9657
9658     InitVideoBuffer(WIN_XSIZE, WIN_YSIZE, DEFAULT_DEPTH, setup.fullscreen);
9659     InitImageTextures();
9660   }
9661
9662   if (init_gadgets_and_anims)
9663   {
9664     // Debug("tools:viewport", "init_gadgets_and_anims");
9665
9666     InitGadgets();
9667     InitGlobalAnimations();
9668   }
9669
9670   if (init_em_graphics)
9671   {
9672     InitGraphicInfo_EM();
9673   }
9674 }