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 //                  http://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 // select level set with EMC X11 graphics before activating EM GFX debugging
  27 #define DEBUG_EM_GFX            FALSE
  28 #define DEBUG_FRAME_TIME        FALSE
  29
  30 // tool button identifiers
  31 #define TOOL_CTRL_ID_YES        0
  32 #define TOOL_CTRL_ID_NO         1
  33 #define TOOL_CTRL_ID_CONFIRM    2
  34 #define TOOL_CTRL_ID_PLAYER_1   3
  35 #define TOOL_CTRL_ID_PLAYER_2   4
  36 #define TOOL_CTRL_ID_PLAYER_3   5
  37 #define TOOL_CTRL_ID_PLAYER_4   6
  38
  39 #define NUM_TOOL_BUTTONS        7
  40
  41 // constants for number of doors and door parts
  42 #define NUM_DOORS               2
  43 #define NUM_PANELS              NUM_DOORS
  44 // #define NUM_PANELS           0
  45 #define MAX_PARTS_PER_DOOR      8
  46 #define MAX_DOOR_PARTS          (NUM_DOORS * MAX_PARTS_PER_DOOR + NUM_PANELS)
  47 #define DOOR_PART_IS_PANEL(i)   ((i) >= NUM_DOORS * MAX_PARTS_PER_DOOR)
  48
  49
  50 struct DoorPartOrderInfo
  51 {
  52   int nr;
  53   int sort_priority;
  54 };
  55
  56 static struct DoorPartOrderInfo door_part_order[MAX_DOOR_PARTS];
  57
  58 struct DoorPartControlInfo
  59 {
  60   int door_token;
  61   int graphic;
  62   struct DoorPartPosInfo *pos;
  63 };
  64
  65 static struct DoorPartControlInfo door_part_controls[] =
  66 {
  67   {
  68     DOOR_1,
  69     IMG_GFX_DOOR_1_PART_1,
  70     &door_1.part_1
  71   },
  72   {
  73     DOOR_1,
  74     IMG_GFX_DOOR_1_PART_2,
  75     &door_1.part_2
  76   },
  77   {
  78     DOOR_1,
  79     IMG_GFX_DOOR_1_PART_3,
  80     &door_1.part_3
  81   },
  82   {
  83     DOOR_1,
  84     IMG_GFX_DOOR_1_PART_4,
  85     &door_1.part_4
  86   },
  87   {
  88     DOOR_1,
  89     IMG_GFX_DOOR_1_PART_5,
  90     &door_1.part_5
  91   },
  92   {
  93     DOOR_1,
  94     IMG_GFX_DOOR_1_PART_6,
  95     &door_1.part_6
  96   },
  97   {
  98     DOOR_1,
  99     IMG_GFX_DOOR_1_PART_7,
 100     &door_1.part_7
 101   },
 102   {
 103     DOOR_1,
 104     IMG_GFX_DOOR_1_PART_8,
 105     &door_1.part_8
 106   },
 107
 108   {
 109     DOOR_2,
 110     IMG_GFX_DOOR_2_PART_1,
 111     &door_2.part_1
 112   },
 113   {
 114     DOOR_2,
 115     IMG_GFX_DOOR_2_PART_2,
 116     &door_2.part_2
 117   },
 118   {
 119     DOOR_2,
 120     IMG_GFX_DOOR_2_PART_3,
 121     &door_2.part_3
 122   },
 123   {
 124     DOOR_2,
 125     IMG_GFX_DOOR_2_PART_4,
 126     &door_2.part_4
 127   },
 128   {
 129     DOOR_2,
 130     IMG_GFX_DOOR_2_PART_5,
 131     &door_2.part_5
 132   },
 133   {
 134     DOOR_2,
 135     IMG_GFX_DOOR_2_PART_6,
 136     &door_2.part_6
 137   },
 138   {
 139     DOOR_2,
 140     IMG_GFX_DOOR_2_PART_7,
 141     &door_2.part_7
 142   },
 143   {
 144     DOOR_2,
 145     IMG_GFX_DOOR_2_PART_8,
 146     &door_2.part_8
 147   },
 148
 149   {
 150     DOOR_1,
 151     IMG_BACKGROUND_PANEL,
 152     &door_1.panel
 153   },
 154   {
 155     DOOR_2,
 156     IMG_BACKGROUND_TAPE,
 157     &door_2.panel
 158   },
 159
 160   {
 161     -1,
 162     -1,
 163     NULL
 164   }
 165 };
 166
 167
 168 // forward declaration for internal use
 169 static void UnmapToolButtons(void);
 170 static void HandleToolButtons(struct GadgetInfo *);
 171 static int el_act_dir2crm(int, int, int);
 172 static int el_act2crm(int, int);
 173
 174 static struct GadgetInfo *tool_gadget[NUM_TOOL_BUTTONS];
 175 static int request_gadget_id = -1;
 176
 177 static char *print_if_not_empty(int element)
 178 {
 179   static char *s = NULL;
 180   char *token_name = element_info[element].token_name;
 181
 182   if (s != NULL)
 183     free(s);
 184
 185   s = checked_malloc(strlen(token_name) + 10 + 1);
 186
 187   if (element != EL_EMPTY)
 188     sprintf(s, "%d\t['%s']", element, token_name);
 189   else
 190     sprintf(s, "%d", element);
 191
 192   return s;
 193 }
 194
 195 int correctLevelPosX_EM(int lx)
 196 {
 197   lx -= 1;
 198   lx -= (BorderElement != EL_EMPTY ? 1 : 0);
 199
 200   return lx;
 201 }
 202
 203 int correctLevelPosY_EM(int ly)
 204 {
 205   ly -= 1;
 206   ly -= (BorderElement != EL_EMPTY ? 1 : 0);
 207
 208   return ly;
 209 }
 210
 211 static int getFieldbufferOffsetX_RND(void)
 212 {
 213   int full_lev_fieldx = lev_fieldx + (BorderElement != EL_EMPTY ? 2 : 0);
 214   int dx = (ScreenMovDir & (MV_LEFT | MV_RIGHT) ? ScreenGfxPos : 0);
 215   int dx_var = dx * TILESIZE_VAR / TILESIZE;
 216   int fx = FX;
 217
 218   if (EVEN(SCR_FIELDX))
 219   {
 220     int ffx = (scroll_x - SBX_Left)  * TILEX_VAR + dx_var;
 221
 222     if (ffx < SBX_Right * TILEX_VAR + TILEX_VAR / 2 + TILEX_VAR)
 223       fx += dx_var - MIN(ffx, TILEX_VAR / 2) + TILEX_VAR;
 224     else
 225       fx += (dx_var > 0 ? TILEX_VAR : 0);
 226   }
 227   else
 228   {
 229     fx += dx_var;
 230   }
 231
 232   if (full_lev_fieldx <= SCR_FIELDX)
 233   {
 234     if (EVEN(SCR_FIELDX))
 235       fx = 2 * TILEX_VAR - (ODD(lev_fieldx)  ? TILEX_VAR / 2 : 0);
 236     else
 237       fx = 2 * TILEX_VAR - (EVEN(lev_fieldx) ? TILEX_VAR / 2 : 0);
 238   }
 239
 240   return fx;
 241 }
 242
 243 static int getFieldbufferOffsetY_RND(void)
 244 {
 245   int full_lev_fieldy = lev_fieldy + (BorderElement != EL_EMPTY ? 2 : 0);
 246   int dy = (ScreenMovDir & (MV_UP | MV_DOWN)    ? ScreenGfxPos : 0);
 247   int dy_var = dy * TILESIZE_VAR / TILESIZE;
 248   int fy = FY;
 249
 250   if (EVEN(SCR_FIELDY))
 251   {
 252     int ffy = (scroll_y - SBY_Upper) * TILEY_VAR + dy_var;
 253
 254     if (ffy < SBY_Lower * TILEY_VAR + TILEY_VAR / 2 + TILEY_VAR)
 255       fy += dy_var - MIN(ffy, TILEY_VAR / 2) + TILEY_VAR;
 256     else
 257       fy += (dy_var > 0 ? TILEY_VAR : 0);
 258   }
 259   else
 260   {
 261     fy += dy_var;
 262   }
 263
 264   if (full_lev_fieldy <= SCR_FIELDY)
 265   {
 266     if (EVEN(SCR_FIELDY))
 267       fy = 2 * TILEY_VAR - (ODD(lev_fieldy)  ? TILEY_VAR / 2 : 0);
 268     else
 269       fy = 2 * TILEY_VAR - (EVEN(lev_fieldy) ? TILEY_VAR / 2 : 0);
 270   }
 271
 272   return fy;
 273 }
 274
 275 static int getLevelFromScreenX_RND(int sx)
 276 {
 277   int fx = getFieldbufferOffsetX_RND();
 278   int dx = fx - FX;
 279   int px = sx - SX;
 280   int lx = LEVELX((px + dx) / TILESIZE_VAR);
 281
 282   return lx;
 283 }
 284
 285 static int getLevelFromScreenY_RND(int sy)
 286 {
 287   int fy = getFieldbufferOffsetY_RND();
 288   int dy = fy - FY;
 289   int py = sy - SY;
 290   int ly = LEVELY((py + dy) / TILESIZE_VAR);
 291
 292   return ly;
 293 }
 294
 295 static int getLevelFromScreenX_EM(int sx)
 296 {
 297   int level_xsize = level.native_em_level->lev->width;
 298   int full_xsize = level_xsize * TILESIZE_VAR;
 299
 300   sx -= (full_xsize < SXSIZE ? (SXSIZE - full_xsize) / 2 : 0);
 301
 302   int fx = getFieldbufferOffsetX_EM();
 303   int dx = fx;
 304   int px = sx - SX;
 305   int lx = LEVELX((px + dx) / TILESIZE_VAR);
 306
 307   lx = correctLevelPosX_EM(lx);
 308
 309   return lx;
 310 }
 311
 312 static int getLevelFromScreenY_EM(int sy)
 313 {
 314   int level_ysize = level.native_em_level->lev->height;
 315   int full_ysize = level_ysize * TILESIZE_VAR;
 316
 317   sy -= (full_ysize < SYSIZE ? (SYSIZE - full_ysize) / 2 : 0);
 318
 319   int fy = getFieldbufferOffsetY_EM();
 320   int dy = fy;
 321   int py = sy - SY;
 322   int ly = LEVELY((py + dy) / TILESIZE_VAR);
 323
 324   ly = correctLevelPosY_EM(ly);
 325
 326   return ly;
 327 }
 328
 329 static int getLevelFromScreenX_SP(int sx)
 330 {
 331   int menBorder = setup.sp_show_border_elements;
 332   int level_xsize = level.native_sp_level->width;
 333   int full_xsize = (level_xsize - (menBorder ? 0 : 1)) * TILESIZE_VAR;
 334
 335   sx += (full_xsize < SXSIZE ? (SXSIZE - full_xsize) / 2 : 0);
 336
 337   int fx = getFieldbufferOffsetX_SP();
 338   int dx = fx - FX;
 339   int px = sx - SX;
 340   int lx = LEVELX((px + dx) / TILESIZE_VAR);
 341
 342   return lx;
 343 }
 344
 345 static int getLevelFromScreenY_SP(int sy)
 346 {
 347   int menBorder = setup.sp_show_border_elements;
 348   int level_ysize = level.native_sp_level->height;
 349   int full_ysize = (level_ysize - (menBorder ? 0 : 1)) * TILESIZE_VAR;
 350
 351   sy += (full_ysize < SYSIZE ? (SYSIZE - full_ysize) / 2 : 0);
 352
 353   int fy = getFieldbufferOffsetY_SP();
 354   int dy = fy - FY;
 355   int py = sy - SY;
 356   int ly = LEVELY((py + dy) / TILESIZE_VAR);
 357
 358   return ly;
 359 }
 360
 361 static int getLevelFromScreenX_MM(int sx)
 362 {
 363   int level_xsize = level.native_mm_level->fieldx;
 364   int full_xsize = level_xsize * TILESIZE_VAR;
 365
 366   sx -= (full_xsize < SXSIZE ? (SXSIZE - full_xsize) / 2 : 0);
 367
 368   int px = sx - SX;
 369   int lx = (px + TILESIZE_VAR) / TILESIZE_VAR - 1;
 370
 371   return lx;
 372 }
 373
 374 static int getLevelFromScreenY_MM(int sy)
 375 {
 376   int level_ysize = level.native_mm_level->fieldy;
 377   int full_ysize = level_ysize * TILESIZE_VAR;
 378
 379   sy -= (full_ysize < SYSIZE ? (SYSIZE - full_ysize) / 2 : 0);
 380
 381   int py = sy - SY;
 382   int ly = (py + TILESIZE_VAR) / TILESIZE_VAR - 1;
 383
 384   return ly;
 385 }
 386
 387 int getLevelFromScreenX(int x)
 388 {
 389   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 390     return getLevelFromScreenX_EM(x);
 391   if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 392     return getLevelFromScreenX_SP(x);
 393   if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 394     return getLevelFromScreenX_MM(x);
 395   else
 396     return getLevelFromScreenX_RND(x);
 397 }
 398
 399 int getLevelFromScreenY(int y)
 400 {
 401   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 402     return getLevelFromScreenY_EM(y);
 403   if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 404     return getLevelFromScreenY_SP(y);
 405   if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 406     return getLevelFromScreenY_MM(y);
 407   else
 408     return getLevelFromScreenY_RND(y);
 409 }
 410
 411 void DumpTile(int x, int y)
 412 {
 413   int sx = SCREENX(x);
 414   int sy = SCREENY(y);
 415   char *token_name;
 416
 417   printf_line("-", 79);
 418   printf("Field Info: SCREEN(%d, %d), LEVEL(%d, %d)\n", sx, sy, x, y);
 419   printf_line("-", 79);
 420
 421   if (!IN_LEV_FIELD(x, y))
 422   {
 423     printf("(not in level field)\n");
 424     printf("\n");
 425
 426     return;
 427   }
 428
 429   token_name = element_info[Feld[x][y]].token_name;
 430
 431   printf("  Feld:        %d\t['%s']\n", Feld[x][y], token_name);
 432   printf("  Back:        %s\n", print_if_not_empty(Back[x][y]));
 433   printf("  Store:       %s\n", print_if_not_empty(Store[x][y]));
 434   printf("  Store2:      %s\n", print_if_not_empty(Store2[x][y]));
 435   printf("  StorePlayer: %s\n", print_if_not_empty(StorePlayer[x][y]));
 436   printf("  MovPos:      %d\n", MovPos[x][y]);
 437   printf("  MovDir:      %d\n", MovDir[x][y]);
 438   printf("  MovDelay:    %d\n", MovDelay[x][y]);
 439   printf("  ChangeDelay: %d\n", ChangeDelay[x][y]);
 440   printf("  CustomValue: %d\n", CustomValue[x][y]);
 441   printf("  GfxElement:  %d\n", GfxElement[x][y]);
 442   printf("  GfxAction:   %d\n", GfxAction[x][y]);
 443   printf("  GfxFrame:    %d [%d]\n", GfxFrame[x][y], FrameCounter);
 444   printf("  Player x/y:  %d, %d\n", local_player->jx, local_player->jy);
 445   printf("\n");
 446 }
 447
 448 void DumpTileFromScreen(int sx, int sy)
 449 {
 450   int lx = getLevelFromScreenX(sx);
 451   int ly = getLevelFromScreenY(sy);
 452
 453   DumpTile(lx, ly);
 454 }
 455
 456 void SetDrawtoField(int mode)
 457 {
 458   if (mode == DRAW_TO_FIELDBUFFER)
 459   {
 460     FX = 2 * TILEX_VAR;
 461     FY = 2 * TILEY_VAR;
 462     BX1 = -2;
 463     BY1 = -2;
 464     BX2 = SCR_FIELDX + 1;
 465     BY2 = SCR_FIELDY + 1;
 466
 467     drawto_field = fieldbuffer;
 468   }
 469   else  // DRAW_TO_BACKBUFFER
 470   {
 471     FX = SX;
 472     FY = SY;
 473     BX1 = 0;
 474     BY1 = 0;
 475     BX2 = SCR_FIELDX - 1;
 476     BY2 = SCR_FIELDY - 1;
 477
 478     drawto_field = backbuffer;
 479   }
 480 }
 481
 482 static void RedrawPlayfield_RND(void)
 483 {
 484   if (game.envelope_active)
 485     return;
 486
 487   DrawLevel(REDRAW_ALL);
 488   DrawAllPlayers();
 489 }
 490
 491 void RedrawPlayfield(void)
 492 {
 493   if (game_status != GAME_MODE_PLAYING)
 494     return;
 495
 496   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 497     RedrawPlayfield_EM(TRUE);
 498   else if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 499     RedrawPlayfield_SP(TRUE);
 500   else if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 501     RedrawPlayfield_MM();
 502   else if (level.game_engine_type == GAME_ENGINE_TYPE_RND)
 503     RedrawPlayfield_RND();
 504
 505   BlitScreenToBitmap(backbuffer);
 506
 507   BlitBitmap(drawto, window, gfx.sx, gfx.sy, gfx.sxsize, gfx.sysize,
 508              gfx.sx, gfx.sy);
 509 }
 510
 511 static void DrawMaskedBorderExt_Rect(int x, int y, int width, int height,
 512                                      int draw_target)
 513 {
 514   Bitmap *src_bitmap = getGlobalBorderBitmapFromStatus(global.border_status);
 515   Bitmap *dst_bitmap = gfx.masked_border_bitmap_ptr;
 516
 517   if (x == -1 && y == -1)
 518     return;
 519
 520   if (draw_target == DRAW_TO_SCREEN)
 521     BlitToScreenMasked(src_bitmap, x, y, width, height, x, y);
 522   else
 523     BlitBitmapMasked(src_bitmap, dst_bitmap, x, y, width, height, x, y);
 524 }
 525
 526 static void DrawMaskedBorderExt_FIELD(int draw_target)
 527 {
 528   if (global.border_status >= GAME_MODE_MAIN &&
 529       global.border_status <= GAME_MODE_PLAYING &&
 530       border.draw_masked[global.border_status])
 531     DrawMaskedBorderExt_Rect(REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE,
 532                              draw_target);
 533 }
 534
 535 static void DrawMaskedBorderExt_DOOR_1(int draw_target)
 536 {
 537   // when drawing to backbuffer, never draw border over open doors
 538   if (draw_target == DRAW_TO_BACKBUFFER &&
 539       (GetDoorState() & DOOR_OPEN_1))
 540     return;
 541
 542   if (border.draw_masked[GFX_SPECIAL_ARG_DOOR] &&
 543       (global.border_status != GAME_MODE_EDITOR ||
 544        border.draw_masked[GFX_SPECIAL_ARG_EDITOR]))
 545     DrawMaskedBorderExt_Rect(DX, DY, DXSIZE, DYSIZE, draw_target);
 546 }
 547
 548 static void DrawMaskedBorderExt_DOOR_2(int draw_target)
 549 {
 550   // when drawing to backbuffer, never draw border over open doors
 551   if (draw_target == DRAW_TO_BACKBUFFER &&
 552       (GetDoorState() & DOOR_OPEN_2))
 553     return;
 554
 555   if (border.draw_masked[GFX_SPECIAL_ARG_DOOR] &&
 556       global.border_status != GAME_MODE_EDITOR)
 557     DrawMaskedBorderExt_Rect(VX, VY, VXSIZE, VYSIZE, draw_target);
 558 }
 559
 560 static void DrawMaskedBorderExt_DOOR_3(int draw_target)
 561 {
 562   // currently not available
 563 }
 564
 565 static void DrawMaskedBorderExt_ALL(int draw_target)
 566 {
 567   DrawMaskedBorderExt_FIELD(draw_target);
 568   DrawMaskedBorderExt_DOOR_1(draw_target);
 569   DrawMaskedBorderExt_DOOR_2(draw_target);
 570   DrawMaskedBorderExt_DOOR_3(draw_target);
 571 }
 572
 573 static void DrawMaskedBorderExt(int redraw_mask, int draw_target)
 574 {
 575   // never draw masked screen borders on borderless screens
 576   if (global.border_status == GAME_MODE_LOADING ||
 577       global.border_status == GAME_MODE_TITLE)
 578     return;
 579
 580   if (redraw_mask & REDRAW_ALL)
 581     DrawMaskedBorderExt_ALL(draw_target);
 582   else
 583   {
 584     if (redraw_mask & REDRAW_FIELD)
 585       DrawMaskedBorderExt_FIELD(draw_target);
 586     if (redraw_mask & REDRAW_DOOR_1)
 587       DrawMaskedBorderExt_DOOR_1(draw_target);
 588     if (redraw_mask & REDRAW_DOOR_2)
 589       DrawMaskedBorderExt_DOOR_2(draw_target);
 590     if (redraw_mask & REDRAW_DOOR_3)
 591       DrawMaskedBorderExt_DOOR_3(draw_target);
 592   }
 593 }
 594
 595 void DrawMaskedBorder_FIELD(void)
 596 {
 597   DrawMaskedBorderExt_FIELD(DRAW_TO_BACKBUFFER);
 598 }
 599
 600 void DrawMaskedBorder(int redraw_mask)
 601 {
 602   DrawMaskedBorderExt(redraw_mask, DRAW_TO_BACKBUFFER);
 603 }
 604
 605 void DrawMaskedBorderToTarget(int draw_target)
 606 {
 607   if (draw_target == DRAW_TO_BACKBUFFER ||
 608       draw_target == DRAW_TO_SCREEN)
 609   {
 610     DrawMaskedBorderExt(REDRAW_ALL, draw_target);
 611   }
 612   else
 613   {
 614     int last_border_status = global.border_status;
 615
 616     if (draw_target == DRAW_TO_FADE_SOURCE)
 617     {
 618       global.border_status = gfx.fade_border_source_status;
 619       gfx.masked_border_bitmap_ptr = gfx.fade_bitmap_source;
 620     }
 621     else if (draw_target == DRAW_TO_FADE_TARGET)
 622     {
 623       global.border_status = gfx.fade_border_target_status;
 624       gfx.masked_border_bitmap_ptr = gfx.fade_bitmap_target;
 625     }
 626
 627     DrawMaskedBorderExt(REDRAW_ALL, draw_target);
 628
 629     global.border_status = last_border_status;
 630     gfx.masked_border_bitmap_ptr = backbuffer;
 631   }
 632 }
 633
 634 void DrawTileCursor(int draw_target)
 635 {
 636   Bitmap *fade_bitmap;
 637   Bitmap *src_bitmap;
 638   int src_x, src_y;
 639   int dst_x, dst_y;
 640   int graphic = IMG_GLOBAL_TILE_CURSOR;
 641   int frame = 0;
 642   int tilesize = TILESIZE_VAR;
 643   int width = tilesize;
 644   int height = tilesize;
 645
 646   if (game_status != GAME_MODE_PLAYING)
 647     return;
 648
 649   if (!tile_cursor.enabled ||
 650       !tile_cursor.active)
 651     return;
 652
 653   if (tile_cursor.moving)
 654   {
 655     int step = TILESIZE_VAR / 4;
 656     int dx = tile_cursor.target_x - tile_cursor.x;
 657     int dy = tile_cursor.target_y - tile_cursor.y;
 658
 659     if (ABS(dx) < step)
 660       tile_cursor.x = tile_cursor.target_x;
 661     else
 662       tile_cursor.x += SIGN(dx) * step;
 663
 664     if (ABS(dy) < step)
 665       tile_cursor.y = tile_cursor.target_y;
 666     else
 667       tile_cursor.y += SIGN(dy) * step;
 668
 669     if (tile_cursor.x == tile_cursor.target_x &&
 670         tile_cursor.y == tile_cursor.target_y)
 671       tile_cursor.moving = FALSE;
 672   }
 673
 674   dst_x = tile_cursor.x;
 675   dst_y = tile_cursor.y;
 676
 677   frame = getGraphicAnimationFrame(graphic, -1);
 678
 679   getSizedGraphicSource(graphic, frame, tilesize, &src_bitmap, &src_x, &src_y);
 680
 681   fade_bitmap =
 682     (draw_target == DRAW_TO_FADE_SOURCE ? gfx.fade_bitmap_source :
 683      draw_target == DRAW_TO_FADE_TARGET ? gfx.fade_bitmap_target : NULL);
 684
 685   if (draw_target == DRAW_TO_SCREEN)
 686     BlitToScreenMasked(src_bitmap, src_x, src_y, width, height, dst_x, dst_y);
 687   else
 688     BlitBitmapMasked(src_bitmap, fade_bitmap, src_x, src_y, width, height,
 689                      dst_x, dst_y);
 690 }
 691
 692 void BlitScreenToBitmap_RND(Bitmap *target_bitmap)
 693 {
 694   int fx = getFieldbufferOffsetX_RND();
 695   int fy = getFieldbufferOffsetY_RND();
 696
 697   BlitBitmap(drawto_field, target_bitmap, fx, fy, SXSIZE, SYSIZE, SX, SY);
 698 }
 699
 700 void BlitScreenToBitmap(Bitmap *target_bitmap)
 701 {
 702   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 703     BlitScreenToBitmap_EM(target_bitmap);
 704   else if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 705     BlitScreenToBitmap_SP(target_bitmap);
 706   else if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 707     BlitScreenToBitmap_MM(target_bitmap);
 708   else if (level.game_engine_type == GAME_ENGINE_TYPE_RND)
 709     BlitScreenToBitmap_RND(target_bitmap);
 710
 711   redraw_mask |= REDRAW_FIELD;
 712 }
 713
 714 static void DrawFramesPerSecond(void)
 715 {
 716   char text[100];
 717   int font_nr = FONT_TEXT_2;
 718   int font_width = getFontWidth(font_nr);
 719   int draw_deactivation_mask = GetDrawDeactivationMask();
 720   boolean draw_masked = (draw_deactivation_mask == REDRAW_NONE);
 721
 722   // draw FPS with leading space (needed if field buffer deactivated)
 723   sprintf(text, " %04.1f fps", global.frames_per_second);
 724
 725   // override draw deactivation mask (required for invisible warp mode)
 726   SetDrawDeactivationMask(REDRAW_NONE);
 727
 728   // draw opaque FPS if field buffer deactivated, else draw masked FPS
 729   DrawTextExt(backbuffer, SX + SXSIZE - font_width * strlen(text), SY, text,
 730               font_nr, (draw_masked ? BLIT_MASKED : BLIT_OPAQUE));
 731
 732   // set draw deactivation mask to previous value
 733   SetDrawDeactivationMask(draw_deactivation_mask);
 734
 735   // force full-screen redraw in this frame
 736   redraw_mask = REDRAW_ALL;
 737 }
 738
 739 #if DEBUG_FRAME_TIME
 740 static void PrintFrameTimeDebugging(void)
 741 {
 742   static unsigned int last_counter = 0;
 743   unsigned int counter = Counter();
 744   int diff_1 = counter - last_counter;
 745   int diff_2 = diff_1 - GAME_FRAME_DELAY;
 746   int diff_2_max = 20;
 747   int diff_2_cut = MIN(ABS(diff_2), diff_2_max);
 748   char diff_bar[2 * diff_2_max + 5];
 749   int pos = 0;
 750   int i;
 751
 752   diff_bar[pos++] = (diff_2 < -diff_2_max ? '<' : ' ');
 753
 754   for (i = 0; i < diff_2_max; i++)
 755     diff_bar[pos++] = (diff_2 >= 0 ? ' ' :
 756                        i >= diff_2_max - diff_2_cut ? '-' : ' ');
 757
 758   diff_bar[pos++] = '|';
 759
 760   for (i = 0; i < diff_2_max; i++)
 761     diff_bar[pos++] = (diff_2 <= 0 ? ' ' : i < diff_2_cut ? '+' : ' ');
 762
 763   diff_bar[pos++] = (diff_2 > diff_2_max ? '>' : ' ');
 764
 765   diff_bar[pos++] = '\0';
 766
 767   Error(ERR_INFO, "%06d [%02d] [%c%02d] %s",
 768         counter,
 769         diff_1,
 770         (diff_2 < 0 ? '-' : diff_2 > 0 ? '+' : ' '), ABS(diff_2),
 771         diff_bar);
 772
 773   last_counter = counter;
 774 }
 775 #endif
 776
 777 static int unifiedRedrawMask(int mask)
 778 {
 779   if (mask & REDRAW_ALL)
 780     return REDRAW_ALL;
 781
 782   if (mask & REDRAW_FIELD && mask & REDRAW_DOORS)
 783     return REDRAW_ALL;
 784
 785   return mask;
 786 }
 787
 788 static boolean equalRedrawMasks(int mask_1, int mask_2)
 789 {
 790   return unifiedRedrawMask(mask_1) == unifiedRedrawMask(mask_2);
 791 }
 792
 793 void BackToFront(void)
 794 {
 795   static int last_redraw_mask = REDRAW_NONE;
 796
 797   // force screen redraw in every frame to continue drawing global animations
 798   // (but always use the last redraw mask to prevent unwanted side effects)
 799   if (redraw_mask == REDRAW_NONE)
 800     redraw_mask = last_redraw_mask;
 801
 802   last_redraw_mask = redraw_mask;
 803
 804 #if 1
 805   // masked border now drawn immediately when blitting backbuffer to window
 806 #else
 807   // draw masked border to all viewports, if defined
 808   DrawMaskedBorder(redraw_mask);
 809 #endif
 810
 811   // draw frames per second (only if debug mode is enabled)
 812   if (redraw_mask & REDRAW_FPS)
 813     DrawFramesPerSecond();
 814
 815   // remove playfield redraw before potentially merging with doors redraw
 816   if (DrawingDeactivated(REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE))
 817     redraw_mask &= ~REDRAW_FIELD;
 818
 819   // redraw complete window if both playfield and (some) doors need redraw
 820   if (redraw_mask & REDRAW_FIELD && redraw_mask & REDRAW_DOORS)
 821     redraw_mask = REDRAW_ALL;
 822
 823   /* although redrawing the whole window would be fine for normal gameplay,
 824      being able to only redraw the playfield is required for deactivating
 825      certain drawing areas (mainly playfield) to work, which is needed for
 826      warp-forward to be fast enough (by skipping redraw of most frames) */
 827
 828   if (redraw_mask & REDRAW_ALL)
 829   {
 830     BlitBitmap(backbuffer, window, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
 831   }
 832   else if (redraw_mask & REDRAW_FIELD)
 833   {
 834     BlitBitmap(backbuffer, window,
 835                REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE, REAL_SX, REAL_SY);
 836   }
 837   else if (redraw_mask & REDRAW_DOORS)
 838   {
 839     // merge door areas to prevent calling screen redraw more than once
 840     int x1 = WIN_XSIZE;
 841     int y1 = WIN_YSIZE;
 842     int x2 = 0;
 843     int y2 = 0;
 844
 845     if (redraw_mask & REDRAW_DOOR_1)
 846     {
 847       x1 = MIN(x1, DX);
 848       y1 = MIN(y1, DY);
 849       x2 = MAX(x2, DX + DXSIZE);
 850       y2 = MAX(y2, DY + DYSIZE);
 851     }
 852
 853     if (redraw_mask & REDRAW_DOOR_2)
 854     {
 855       x1 = MIN(x1, VX);
 856       y1 = MIN(y1, VY);
 857       x2 = MAX(x2, VX + VXSIZE);
 858       y2 = MAX(y2, VY + VYSIZE);
 859     }
 860
 861     if (redraw_mask & REDRAW_DOOR_3)
 862     {
 863       x1 = MIN(x1, EX);
 864       y1 = MIN(y1, EY);
 865       x2 = MAX(x2, EX + EXSIZE);
 866       y2 = MAX(y2, EY + EYSIZE);
 867     }
 868
 869     // make sure that at least one pixel is blitted, and inside the screen
 870     // (else nothing is blitted, causing the animations not to be updated)
 871     x1 = MIN(MAX(0, x1), WIN_XSIZE - 1);
 872     y1 = MIN(MAX(0, y1), WIN_YSIZE - 1);
 873     x2 = MIN(MAX(1, x2), WIN_XSIZE);
 874     y2 = MIN(MAX(1, y2), WIN_YSIZE);
 875
 876     BlitBitmap(backbuffer, window, x1, y1, x2 - x1, y2 - y1, x1, y1);
 877   }
 878
 879   redraw_mask = REDRAW_NONE;
 880
 881 #if DEBUG_FRAME_TIME
 882   PrintFrameTimeDebugging();
 883 #endif
 884 }
 885
 886 void BackToFront_WithFrameDelay(unsigned int frame_delay_value)
 887 {
 888   unsigned int frame_delay_value_old = GetVideoFrameDelay();
 889
 890   SetVideoFrameDelay(frame_delay_value);
 891
 892   BackToFront();
 893
 894   SetVideoFrameDelay(frame_delay_value_old);
 895 }
 896
 897 static int fade_type_skip = FADE_TYPE_NONE;
 898
 899 static void FadeExt(int fade_mask, int fade_mode, int fade_type)
 900 {
 901   void (*draw_border_function)(void) = NULL;
 902   int x, y, width, height;
 903   int fade_delay, post_delay;
 904
 905   if (fade_type == FADE_TYPE_FADE_OUT)
 906   {
 907     if (fade_type_skip != FADE_TYPE_NONE)
 908     {
 909       // skip all fade operations until specified fade operation
 910       if (fade_type & fade_type_skip)
 911         fade_type_skip = FADE_TYPE_NONE;
 912
 913       return;
 914     }
 915
 916     if (fading.fade_mode & FADE_TYPE_TRANSFORM)
 917       return;
 918   }
 919
 920   redraw_mask |= fade_mask;
 921
 922   if (fade_type == FADE_TYPE_SKIP)
 923   {
 924     fade_type_skip = fade_mode;
 925
 926     return;
 927   }
 928
 929   fade_delay = fading.fade_delay;
 930   post_delay = (fade_mode == FADE_MODE_FADE_OUT ? fading.post_delay : 0);
 931
 932   if (fade_type_skip != FADE_TYPE_NONE)
 933   {
 934     // skip all fade operations until specified fade operation
 935     if (fade_type & fade_type_skip)
 936       fade_type_skip = FADE_TYPE_NONE;
 937
 938     fade_delay = 0;
 939   }
 940
 941   if (global.autoplay_leveldir)
 942   {
 943     return;
 944   }
 945
 946   if (fade_mask == REDRAW_FIELD)
 947   {
 948     x = FADE_SX;
 949     y = FADE_SY;
 950     width  = FADE_SXSIZE;
 951     height = FADE_SYSIZE;
 952
 953     if (border.draw_masked_when_fading)
 954       draw_border_function = DrawMaskedBorder_FIELD;    // update when fading
 955     else
 956       DrawMaskedBorder_FIELD();                         // draw once
 957   }
 958   else          // REDRAW_ALL
 959   {
 960     x = 0;
 961     y = 0;
 962     width  = WIN_XSIZE;
 963     height = WIN_YSIZE;
 964   }
 965
 966   if (!setup.fade_screens ||
 967       fade_delay == 0 ||
 968       fading.fade_mode == FADE_MODE_NONE)
 969   {
 970     if (fade_mode == FADE_MODE_FADE_OUT)
 971       return;
 972
 973     BlitBitmap(backbuffer, window, x, y, width, height, x, y);
 974
 975     redraw_mask &= ~fade_mask;
 976
 977     return;
 978   }
 979
 980   FadeRectangle(x, y, width, height, fade_mode, fade_delay, post_delay,
 981                 draw_border_function);
 982
 983   redraw_mask &= ~fade_mask;
 984
 985   ClearAutoRepeatKeyEvents();
 986 }
 987
 988 static void SetScreenStates_BeforeFadingIn(void)
 989 {
 990   // temporarily set screen mode for animations to screen after fading in
 991   global.anim_status = global.anim_status_next;
 992
 993   // store backbuffer with all animations that will be started after fading in
 994   if (fade_type_skip != FADE_MODE_SKIP_FADE_IN)
 995     PrepareFadeBitmap(DRAW_TO_FADE_TARGET);
 996
 997   // set screen mode for animations back to fading
 998   global.anim_status = GAME_MODE_PSEUDO_FADING;
 999 }
1000
1001 static void SetScreenStates_AfterFadingIn(void)
1002 {
1003   // store new source screen (to use correct masked border for fading)
1004   gfx.fade_border_source_status = global.border_status;
1005
1006   global.anim_status = global.anim_status_next;
1007 }
1008
1009 static void SetScreenStates_BeforeFadingOut(void)
1010 {
1011   // store new target screen (to use correct masked border for fading)
1012   gfx.fade_border_target_status = game_status;
1013
1014   // set screen mode for animations to fading
1015   global.anim_status = GAME_MODE_PSEUDO_FADING;
1016
1017   // store backbuffer with all animations that will be stopped for fading out
1018   if (fade_type_skip != FADE_MODE_SKIP_FADE_OUT)
1019     PrepareFadeBitmap(DRAW_TO_FADE_SOURCE);
1020 }
1021
1022 static void SetScreenStates_AfterFadingOut(void)
1023 {
1024   global.border_status = game_status;
1025 }
1026
1027 void FadeIn(int fade_mask)
1028 {
1029   SetScreenStates_BeforeFadingIn();
1030
1031 #if 1
1032   DrawMaskedBorder(REDRAW_ALL);
1033 #endif
1034
1035   if (fading.fade_mode & FADE_TYPE_TRANSFORM)
1036     FadeExt(fade_mask, fading.fade_mode, FADE_TYPE_FADE_IN);
1037   else
1038     FadeExt(fade_mask, FADE_MODE_FADE_IN, FADE_TYPE_FADE_IN);
1039
1040   FADE_SX = REAL_SX;
1041   FADE_SY = REAL_SY;
1042   FADE_SXSIZE = FULL_SXSIZE;
1043   FADE_SYSIZE = FULL_SYSIZE;
1044
1045   // activate virtual buttons depending on upcoming game status
1046   if (strEqual(setup.touch.control_type, TOUCH_CONTROL_VIRTUAL_BUTTONS) &&
1047       game_status == GAME_MODE_PLAYING && !tape.playing)
1048     SetOverlayActive(TRUE);
1049
1050   SetScreenStates_AfterFadingIn();
1051
1052   // force update of global animation status in case of rapid screen changes
1053   redraw_mask = REDRAW_ALL;
1054   BackToFront();
1055 }
1056
1057 void FadeOut(int fade_mask)
1058 {
1059   // update screen if areas covered by "fade_mask" and "redraw_mask" differ
1060   if (!equalRedrawMasks(fade_mask, redraw_mask))
1061     BackToFront();
1062
1063   SetScreenStates_BeforeFadingOut();
1064
1065   SetTileCursorActive(FALSE);
1066   SetOverlayActive(FALSE);
1067
1068 #if 0
1069   DrawMaskedBorder(REDRAW_ALL);
1070 #endif
1071
1072   if (fading.fade_mode & FADE_TYPE_TRANSFORM)
1073     FadeExt(fade_mask, fading.fade_mode, FADE_TYPE_FADE_OUT);
1074   else
1075     FadeExt(fade_mask, FADE_MODE_FADE_OUT, FADE_TYPE_FADE_OUT);
1076
1077   SetScreenStates_AfterFadingOut();
1078 }
1079
1080 static void FadeSetLeaveNext(struct TitleFadingInfo fading_leave, boolean set)
1081 {
1082   static struct TitleFadingInfo fading_leave_stored;
1083
1084   if (set)
1085     fading_leave_stored = fading_leave;
1086   else
1087     fading = fading_leave_stored;
1088 }
1089
1090 void FadeSetEnterMenu(void)
1091 {
1092   fading = menu.enter_menu;
1093
1094   FadeSetLeaveNext(fading, TRUE);       // (keep same fade mode)
1095 }
1096
1097 void FadeSetLeaveMenu(void)
1098 {
1099   fading = menu.leave_menu;
1100
1101   FadeSetLeaveNext(fading, TRUE);       // (keep same fade mode)
1102 }
1103
1104 void FadeSetEnterScreen(void)
1105 {
1106   fading = menu.enter_screen[game_status];
1107
1108   FadeSetLeaveNext(menu.leave_screen[game_status], TRUE);       // store
1109 }
1110
1111 void FadeSetNextScreen(void)
1112 {
1113   fading = menu.next_screen[game_status];
1114
1115   // (do not overwrite fade mode set by FadeSetEnterScreen)
1116   // FadeSetLeaveNext(fading, TRUE);    // (keep same fade mode)
1117 }
1118
1119 void FadeSetLeaveScreen(void)
1120 {
1121   FadeSetLeaveNext(menu.leave_screen[game_status], FALSE);      // recall
1122 }
1123
1124 void FadeSetFromType(int type)
1125 {
1126   if (type & TYPE_ENTER_SCREEN)
1127     FadeSetEnterScreen();
1128   else if (type & TYPE_ENTER)
1129     FadeSetEnterMenu();
1130   else if (type & TYPE_LEAVE)
1131     FadeSetLeaveMenu();
1132 }
1133
1134 void FadeSetDisabled(void)
1135 {
1136   static struct TitleFadingInfo fading_none = { FADE_MODE_NONE, -1, -1, -1 };
1137
1138   fading = fading_none;
1139 }
1140
1141 void FadeSkipNextFadeIn(void)
1142 {
1143   FadeExt(0, FADE_MODE_SKIP_FADE_IN, FADE_TYPE_SKIP);
1144 }
1145
1146 void FadeSkipNextFadeOut(void)
1147 {
1148   FadeExt(0, FADE_MODE_SKIP_FADE_OUT, FADE_TYPE_SKIP);
1149 }
1150
1151 static Bitmap *getBitmapFromGraphicOrDefault(int graphic, int default_graphic)
1152 {
1153   if (graphic == IMG_UNDEFINED)
1154     return NULL;
1155
1156   boolean redefined = getImageListEntryFromImageID(graphic)->redefined;
1157
1158   return (graphic_info[graphic].bitmap != NULL || redefined ?
1159           graphic_info[graphic].bitmap :
1160           graphic_info[default_graphic].bitmap);
1161 }
1162
1163 static Bitmap *getBackgroundBitmap(int graphic)
1164 {
1165   return getBitmapFromGraphicOrDefault(graphic, IMG_BACKGROUND);
1166 }
1167
1168 static Bitmap *getGlobalBorderBitmap(int graphic)
1169 {
1170   return getBitmapFromGraphicOrDefault(graphic, IMG_GLOBAL_BORDER);
1171 }
1172
1173 Bitmap *getGlobalBorderBitmapFromStatus(int status)
1174 {
1175   int graphic =
1176     (status == GAME_MODE_MAIN ||
1177      status == GAME_MODE_PSEUDO_TYPENAME        ? IMG_GLOBAL_BORDER_MAIN :
1178      status == GAME_MODE_SCORES                 ? IMG_GLOBAL_BORDER_SCORES :
1179      status == GAME_MODE_EDITOR                 ? IMG_GLOBAL_BORDER_EDITOR :
1180      status == GAME_MODE_PLAYING                ? IMG_GLOBAL_BORDER_PLAYING :
1181      IMG_GLOBAL_BORDER);
1182
1183   return getGlobalBorderBitmap(graphic);
1184 }
1185
1186 void SetWindowBackgroundImageIfDefined(int graphic)
1187 {
1188   if (graphic_info[graphic].bitmap)
1189     SetWindowBackgroundBitmap(graphic_info[graphic].bitmap);
1190 }
1191
1192 void SetMainBackgroundImageIfDefined(int graphic)
1193 {
1194   if (graphic_info[graphic].bitmap)
1195     SetMainBackgroundBitmap(graphic_info[graphic].bitmap);
1196 }
1197
1198 void SetDoorBackgroundImageIfDefined(int graphic)
1199 {
1200   if (graphic_info[graphic].bitmap)
1201     SetDoorBackgroundBitmap(graphic_info[graphic].bitmap);
1202 }
1203
1204 void SetWindowBackgroundImage(int graphic)
1205 {
1206   SetWindowBackgroundBitmap(getBackgroundBitmap(graphic));
1207 }
1208
1209 void SetMainBackgroundImage(int graphic)
1210 {
1211   SetMainBackgroundBitmap(getBackgroundBitmap(graphic));
1212 }
1213
1214 void SetDoorBackgroundImage(int graphic)
1215 {
1216   SetDoorBackgroundBitmap(getBackgroundBitmap(graphic));
1217 }
1218
1219 void SetPanelBackground(void)
1220 {
1221   struct GraphicInfo *gfx = &graphic_info[IMG_BACKGROUND_PANEL];
1222
1223   BlitBitmapTiled(gfx->bitmap, bitmap_db_panel, gfx->src_x, gfx->src_y,
1224                   gfx->width, gfx->height, 0, 0, DXSIZE, DYSIZE);
1225
1226   SetDoorBackgroundBitmap(bitmap_db_panel);
1227 }
1228
1229 void DrawBackground(int x, int y, int width, int height)
1230 {
1231   // "drawto" might still point to playfield buffer here (hall of fame)
1232   ClearRectangleOnBackground(backbuffer, x, y, width, height);
1233
1234   if (IN_GFX_FIELD_FULL(x, y))
1235     redraw_mask |= REDRAW_FIELD;
1236   else if (IN_GFX_DOOR_1(x, y))
1237     redraw_mask |= REDRAW_DOOR_1;
1238   else if (IN_GFX_DOOR_2(x, y))
1239     redraw_mask |= REDRAW_DOOR_2;
1240   else if (IN_GFX_DOOR_3(x, y))
1241     redraw_mask |= REDRAW_DOOR_3;
1242 }
1243
1244 void DrawBackgroundForFont(int x, int y, int width, int height, int font_nr)
1245 {
1246   struct FontBitmapInfo *font = getFontBitmapInfo(font_nr);
1247
1248   if (font->bitmap == NULL)
1249     return;
1250
1251   DrawBackground(x, y, width, height);
1252 }
1253
1254 void DrawBackgroundForGraphic(int x, int y, int width, int height, int graphic)
1255 {
1256   struct GraphicInfo *g = &graphic_info[graphic];
1257
1258   if (g->bitmap == NULL)
1259     return;
1260
1261   DrawBackground(x, y, width, height);
1262 }
1263
1264 static int game_status_last = -1;
1265 static Bitmap *global_border_bitmap_last = NULL;
1266 static Bitmap *global_border_bitmap = NULL;
1267 static int real_sx_last = -1, real_sy_last = -1;
1268 static int full_sxsize_last = -1, full_sysize_last = -1;
1269 static int dx_last = -1, dy_last = -1;
1270 static int dxsize_last = -1, dysize_last = -1;
1271 static int vx_last = -1, vy_last = -1;
1272 static int vxsize_last = -1, vysize_last = -1;
1273 static int ex_last = -1, ey_last = -1;
1274 static int exsize_last = -1, eysize_last = -1;
1275
1276 boolean CheckIfGlobalBorderHasChanged(void)
1277 {
1278   // if game status has not changed, global border has not changed either
1279   if (game_status == game_status_last)
1280     return FALSE;
1281
1282   // determine and store new global border bitmap for current game status
1283   global_border_bitmap = getGlobalBorderBitmapFromStatus(game_status);
1284
1285   return (global_border_bitmap_last != global_border_bitmap);
1286 }
1287
1288 #define ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED             0
1289
1290 #if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
1291 static boolean CheckIfGlobalBorderRedrawIsNeeded(void)
1292 {
1293   // if game status has not changed, nothing has to be redrawn
1294   if (game_status == game_status_last)
1295     return FALSE;
1296
1297   // redraw if last screen was title screen
1298   if (game_status_last == GAME_MODE_TITLE)
1299     return TRUE;
1300
1301   // redraw if global screen border has changed
1302   if (CheckIfGlobalBorderHasChanged())
1303     return TRUE;
1304
1305   // redraw if position or size of playfield area has changed
1306   if (real_sx_last != REAL_SX || real_sy_last != REAL_SY ||
1307       full_sxsize_last != FULL_SXSIZE || full_sysize_last != FULL_SYSIZE)
1308     return TRUE;
1309
1310   // redraw if position or size of door area has changed
1311   if (dx_last != DX || dy_last != DY ||
1312       dxsize_last != DXSIZE || dysize_last != DYSIZE)
1313     return TRUE;
1314
1315   // redraw if position or size of tape area has changed
1316   if (vx_last != VX || vy_last != VY ||
1317       vxsize_last != VXSIZE || vysize_last != VYSIZE)
1318     return TRUE;
1319
1320   // redraw if position or size of editor area has changed
1321   if (ex_last != EX || ey_last != EY ||
1322       exsize_last != EXSIZE || eysize_last != EYSIZE)
1323     return TRUE;
1324
1325   return FALSE;
1326 }
1327 #endif
1328
1329 static void RedrawGlobalBorderFromBitmap(Bitmap *bitmap)
1330 {
1331   if (bitmap)
1332     BlitBitmap(bitmap, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
1333   else
1334     ClearRectangle(backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE);
1335 }
1336
1337 void RedrawGlobalBorder(void)
1338 {
1339   Bitmap *bitmap = getGlobalBorderBitmapFromStatus(game_status);
1340
1341   RedrawGlobalBorderFromBitmap(bitmap);
1342
1343   redraw_mask = REDRAW_ALL;
1344 }
1345
1346 static void RedrawGlobalBorderIfNeeded(void)
1347 {
1348 #if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
1349   if (game_status == game_status_last)
1350     return;
1351 #endif
1352
1353   // copy current draw buffer to later copy back areas that have not changed
1354   if (game_status_last != GAME_MODE_TITLE)
1355     BlitBitmap(backbuffer, bitmap_db_store_1, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
1356
1357 #if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
1358   if (CheckIfGlobalBorderRedrawIsNeeded())
1359 #endif
1360   {
1361     // redraw global screen border (or clear, if defined to be empty)
1362     RedrawGlobalBorderFromBitmap(global_border_bitmap);
1363
1364     if (game_status == GAME_MODE_EDITOR)
1365       DrawSpecialEditorDoor();
1366
1367     // copy previous playfield and door areas, if they are defined on both
1368     // previous and current screen and if they still have the same size
1369
1370     if (real_sx_last != -1 && real_sy_last != -1 &&
1371         REAL_SX != -1 && REAL_SY != -1 &&
1372         full_sxsize_last == FULL_SXSIZE && full_sysize_last == FULL_SYSIZE)
1373       BlitBitmap(bitmap_db_store_1, backbuffer,
1374                  real_sx_last, real_sy_last, FULL_SXSIZE, FULL_SYSIZE,
1375                  REAL_SX, REAL_SY);
1376
1377     if (dx_last != -1 && dy_last != -1 &&
1378         DX != -1 && DY != -1 &&
1379         dxsize_last == DXSIZE && dysize_last == DYSIZE)
1380       BlitBitmap(bitmap_db_store_1, backbuffer,
1381                  dx_last, dy_last, DXSIZE, DYSIZE, DX, DY);
1382
1383     if (game_status != GAME_MODE_EDITOR)
1384     {
1385       if (vx_last != -1 && vy_last != -1 &&
1386           VX != -1 && VY != -1 &&
1387           vxsize_last == VXSIZE && vysize_last == VYSIZE)
1388         BlitBitmap(bitmap_db_store_1, backbuffer,
1389                    vx_last, vy_last, VXSIZE, VYSIZE, VX, VY);
1390     }
1391     else
1392     {
1393       if (ex_last != -1 && ey_last != -1 &&
1394           EX != -1 && EY != -1 &&
1395           exsize_last == EXSIZE && eysize_last == EYSIZE)
1396         BlitBitmap(bitmap_db_store_1, backbuffer,
1397                    ex_last, ey_last, EXSIZE, EYSIZE, EX, EY);
1398     }
1399
1400     redraw_mask = REDRAW_ALL;
1401   }
1402
1403   game_status_last = game_status;
1404
1405   global_border_bitmap_last = global_border_bitmap;
1406
1407   real_sx_last = REAL_SX;
1408   real_sy_last = REAL_SY;
1409   full_sxsize_last = FULL_SXSIZE;
1410   full_sysize_last = FULL_SYSIZE;
1411   dx_last = DX;
1412   dy_last = DY;
1413   dxsize_last = DXSIZE;
1414   dysize_last = DYSIZE;
1415   vx_last = VX;
1416   vy_last = VY;
1417   vxsize_last = VXSIZE;
1418   vysize_last = VYSIZE;
1419   ex_last = EX;
1420   ey_last = EY;
1421   exsize_last = EXSIZE;
1422   eysize_last = EYSIZE;
1423 }
1424
1425 void ClearField(void)
1426 {
1427   RedrawGlobalBorderIfNeeded();
1428
1429   // !!! "drawto" might still point to playfield buffer here (see above) !!!
1430   // (when entering hall of fame after playing)
1431   DrawBackground(REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE);
1432
1433   // !!! maybe this should be done before clearing the background !!!
1434   if (game_status == GAME_MODE_PLAYING)
1435   {
1436     ClearRectangle(fieldbuffer, 0, 0, FXSIZE, FYSIZE);
1437     SetDrawtoField(DRAW_TO_FIELDBUFFER);
1438   }
1439   else
1440   {
1441     SetDrawtoField(DRAW_TO_BACKBUFFER);
1442   }
1443 }
1444
1445 void MarkTileDirty(int x, int y)
1446 {
1447   redraw_mask |= REDRAW_FIELD;
1448 }
1449
1450 void SetBorderElement(void)
1451 {
1452   int x, y;
1453
1454   BorderElement = EL_EMPTY;
1455
1456   // the MM game engine does not use a visible border element
1457   if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
1458     return;
1459
1460   for (y = 0; y < lev_fieldy && BorderElement == EL_EMPTY; y++)
1461   {
1462     for (x = 0; x < lev_fieldx; x++)
1463     {
1464       if (!IS_INDESTRUCTIBLE(Feld[x][y]))
1465         BorderElement = EL_STEELWALL;
1466
1467       if (y != 0 && y != lev_fieldy - 1 && x != lev_fieldx - 1)
1468         x = lev_fieldx - 2;
1469     }
1470   }
1471 }
1472
1473 void FloodFillLevelExt(int from_x, int from_y, int fill_element,
1474                        int max_array_fieldx, int max_array_fieldy,
1475                        short field[max_array_fieldx][max_array_fieldy],
1476                        int max_fieldx, int max_fieldy)
1477 {
1478   int i,x,y;
1479   int old_element;
1480   static int check[4][2] = { { -1, 0 }, { 0, -1 }, { 1, 0 }, { 0, 1 } };
1481   static int safety = 0;
1482
1483   // check if starting field still has the desired content
1484   if (field[from_x][from_y] == fill_element)
1485     return;
1486
1487   safety++;
1488
1489   if (safety > max_fieldx * max_fieldy)
1490     Error(ERR_EXIT, "Something went wrong in 'FloodFill()'. Please debug.");
1491
1492   old_element = field[from_x][from_y];
1493   field[from_x][from_y] = fill_element;
1494
1495   for (i = 0; i < 4; i++)
1496   {
1497     x = from_x + check[i][0];
1498     y = from_y + check[i][1];
1499
1500     if (IN_FIELD(x, y, max_fieldx, max_fieldy) && field[x][y] == old_element)
1501       FloodFillLevelExt(x, y, fill_element, max_array_fieldx, max_array_fieldy,
1502                         field, max_fieldx, max_fieldy);
1503   }
1504
1505   safety--;
1506 }
1507
1508 void FloodFillLevel(int from_x, int from_y, int fill_element,
1509                     short field[MAX_LEV_FIELDX][MAX_LEV_FIELDY],
1510                     int max_fieldx, int max_fieldy)
1511 {
1512   FloodFillLevelExt(from_x, from_y, fill_element,
1513                     MAX_LEV_FIELDX, MAX_LEV_FIELDY, field,
1514                     max_fieldx, max_fieldy);
1515 }
1516
1517 void SetRandomAnimationValue(int x, int y)
1518 {
1519   gfx.anim_random_frame = GfxRandom[x][y];
1520 }
1521
1522 int getGraphicAnimationFrame(int graphic, int sync_frame)
1523 {
1524   // animation synchronized with global frame counter, not move position
1525   if (graphic_info[graphic].anim_global_sync || sync_frame < 0)
1526     sync_frame = FrameCounter;
1527
1528   return getAnimationFrame(graphic_info[graphic].anim_frames,
1529                            graphic_info[graphic].anim_delay,
1530                            graphic_info[graphic].anim_mode,
1531                            graphic_info[graphic].anim_start_frame,
1532                            sync_frame);
1533 }
1534
1535 void getGraphicSourceBitmap(int graphic, int tilesize, Bitmap **bitmap)
1536 {
1537   struct GraphicInfo *g = &graphic_info[graphic];
1538   int tilesize_capped = MIN(MAX(1, tilesize), TILESIZE);
1539
1540   if (tilesize == gfx.standard_tile_size)
1541     *bitmap = g->bitmaps[IMG_BITMAP_STANDARD];
1542   else if (tilesize == game.tile_size)
1543     *bitmap = g->bitmaps[IMG_BITMAP_GAME];
1544   else
1545     *bitmap = g->bitmaps[IMG_BITMAP_1x1 - log_2(tilesize_capped)];
1546 }
1547
1548 void getGraphicSourceXY(int graphic, int frame, int *x, int *y,
1549                         boolean get_backside)
1550 {
1551   struct GraphicInfo *g = &graphic_info[graphic];
1552   int src_x = g->src_x + (get_backside ? g->offset2_x : 0);
1553   int src_y = g->src_y + (get_backside ? g->offset2_y : 0);
1554
1555   if (g->offset_y == 0)         // frames are ordered horizontally
1556   {
1557     int max_width = g->anim_frames_per_line * g->width;
1558     int pos = (src_y / g->height) * max_width + src_x + frame * g->offset_x;
1559
1560     *x = pos % max_width;
1561     *y = src_y % g->height + pos / max_width * g->height;
1562   }
1563   else if (g->offset_x == 0)    // frames are ordered vertically
1564   {
1565     int max_height = g->anim_frames_per_line * g->height;
1566     int pos = (src_x / g->width) * max_height + src_y + frame * g->offset_y;
1567
1568     *x = src_x % g->width + pos / max_height * g->width;
1569     *y = pos % max_height;
1570   }
1571   else                          // frames are ordered diagonally
1572   {
1573     *x = src_x + frame * g->offset_x;
1574     *y = src_y + frame * g->offset_y;
1575   }
1576 }
1577
1578 void getSizedGraphicSourceExt(int graphic, int frame, int tilesize,
1579                               Bitmap **bitmap, int *x, int *y,
1580                               boolean get_backside)
1581 {
1582   struct GraphicInfo *g = &graphic_info[graphic];
1583
1584   // if no graphics defined at all, use fallback graphics
1585   if (g->bitmaps == NULL)
1586     *g = graphic_info[IMG_CHAR_EXCLAM];
1587
1588   // if no in-game graphics defined, always use standard graphic size
1589   if (g->bitmaps[IMG_BITMAP_GAME] == NULL)
1590     tilesize = TILESIZE;
1591
1592   getGraphicSourceBitmap(graphic, tilesize, bitmap);
1593   getGraphicSourceXY(graphic, frame, x, y, get_backside);
1594
1595   *x = *x * tilesize / g->tile_size;
1596   *y = *y * tilesize / g->tile_size;
1597 }
1598
1599 void getSizedGraphicSource(int graphic, int frame, int tilesize,
1600                            Bitmap **bitmap, int *x, int *y)
1601 {
1602   getSizedGraphicSourceExt(graphic, frame, tilesize, bitmap, x, y, FALSE);
1603 }
1604
1605 void getFixedGraphicSource(int graphic, int frame,
1606                            Bitmap **bitmap, int *x, int *y)
1607 {
1608   getSizedGraphicSourceExt(graphic, frame, TILESIZE, bitmap, x, y, FALSE);
1609 }
1610
1611 void getMiniGraphicSource(int graphic, Bitmap **bitmap, int *x, int *y)
1612 {
1613   getSizedGraphicSource(graphic, 0, MINI_TILESIZE, bitmap, x, y);
1614 }
1615
1616 static void getGraphicSourceExt(int graphic, int frame, Bitmap **bitmap,
1617                                 int *x, int *y, boolean get_backside)
1618 {
1619   getSizedGraphicSourceExt(graphic, frame, TILESIZE_VAR, bitmap, x, y,
1620                            get_backside);
1621 }
1622
1623 void getGraphicSource(int graphic, int frame, Bitmap **bitmap, int *x, int *y)
1624 {
1625   getGraphicSourceExt(graphic, frame, bitmap, x, y, FALSE);
1626 }
1627
1628 void DrawGraphic(int x, int y, int graphic, int frame)
1629 {
1630 #if DEBUG
1631   if (!IN_SCR_FIELD(x, y))
1632   {
1633     printf("DrawGraphic(): x = %d, y = %d, graphic = %d\n", x, y, graphic);
1634     printf("DrawGraphic(): This should never happen!\n");
1635     return;
1636   }
1637 #endif
1638
1639   DrawGraphicExt(drawto_field, FX + x * TILEX_VAR, FY + y * TILEY_VAR, graphic,
1640                  frame);
1641
1642   MarkTileDirty(x, y);
1643 }
1644
1645 void DrawFixedGraphic(int x, int y, int graphic, int frame)
1646 {
1647 #if DEBUG
1648   if (!IN_SCR_FIELD(x, y))
1649   {
1650     printf("DrawGraphic(): x = %d, y = %d, graphic = %d\n", x, y, graphic);
1651     printf("DrawGraphic(): This should never happen!\n");
1652     return;
1653   }
1654 #endif
1655
1656   DrawFixedGraphicExt(drawto_field, FX + x * TILEX, FY + y * TILEY, graphic,
1657                       frame);
1658   MarkTileDirty(x, y);
1659 }
1660
1661 void DrawGraphicExt(DrawBuffer *dst_bitmap, int x, int y, int graphic,
1662                     int frame)
1663 {
1664   Bitmap *src_bitmap;
1665   int src_x, src_y;
1666
1667   getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1668
1669   BlitBitmap(src_bitmap, dst_bitmap, src_x, src_y, TILEX_VAR, TILEY_VAR, x, y);
1670 }
1671
1672 void DrawFixedGraphicExt(DrawBuffer *dst_bitmap, int x, int y, int graphic,
1673                          int frame)
1674 {
1675   Bitmap *src_bitmap;
1676   int src_x, src_y;
1677
1678   getFixedGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1679   BlitBitmap(src_bitmap, dst_bitmap, src_x, src_y, TILEX, TILEY, x, y);
1680 }
1681
1682 void DrawGraphicThruMask(int x, int y, int graphic, int frame)
1683 {
1684 #if DEBUG
1685   if (!IN_SCR_FIELD(x, y))
1686   {
1687     printf("DrawGraphicThruMask(): x = %d,y = %d, graphic = %d\n",x,y,graphic);
1688     printf("DrawGraphicThruMask(): This should never happen!\n");
1689     return;
1690   }
1691 #endif
1692
1693   DrawGraphicThruMaskExt(drawto_field, FX + x * TILEX_VAR, FY + y * TILEY_VAR,
1694                          graphic, frame);
1695
1696   MarkTileDirty(x, y);
1697 }
1698
1699 void DrawFixedGraphicThruMask(int x, int y, int graphic, int frame)
1700 {
1701 #if DEBUG
1702   if (!IN_SCR_FIELD(x, y))
1703   {
1704     printf("DrawGraphicThruMask(): x = %d,y = %d, graphic = %d\n",x,y,graphic);
1705     printf("DrawGraphicThruMask(): This should never happen!\n");
1706     return;
1707   }
1708 #endif
1709
1710   DrawFixedGraphicThruMaskExt(drawto_field, FX + x * TILEX, FY + y * TILEY,
1711                               graphic, frame);
1712   MarkTileDirty(x, y);
1713 }
1714
1715 void DrawGraphicThruMaskExt(DrawBuffer *d, int dst_x, int dst_y, int graphic,
1716                             int frame)
1717 {
1718   Bitmap *src_bitmap;
1719   int src_x, src_y;
1720
1721   getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1722
1723   BlitBitmapMasked(src_bitmap, d, src_x, src_y, TILEX_VAR, TILEY_VAR,
1724                    dst_x, dst_y);
1725 }
1726
1727 void DrawFixedGraphicThruMaskExt(DrawBuffer *d, int dst_x, int dst_y,
1728                                  int graphic, int frame)
1729 {
1730   Bitmap *src_bitmap;
1731   int src_x, src_y;
1732
1733   getFixedGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1734
1735   BlitBitmapMasked(src_bitmap, d, src_x, src_y, TILEX, TILEY,
1736                    dst_x, dst_y);
1737 }
1738
1739 void DrawSizedGraphic(int x, int y, int graphic, int frame, int tilesize)
1740 {
1741   DrawSizedGraphicExt(drawto, SX + x * tilesize, SY + y * tilesize, graphic,
1742                       frame, tilesize);
1743   MarkTileDirty(x / tilesize, y / tilesize);
1744 }
1745
1746 void DrawSizedGraphicThruMask(int x, int y, int graphic, int frame,
1747                               int tilesize)
1748 {
1749   DrawSizedGraphicThruMaskExt(drawto, SX + x * tilesize, SY + y * tilesize,
1750                               graphic, frame, tilesize);
1751   MarkTileDirty(x / tilesize, y / tilesize);
1752 }
1753
1754 void DrawSizedGraphicExt(DrawBuffer *d, int x, int y, int graphic, int frame,
1755                          int tilesize)
1756 {
1757   Bitmap *src_bitmap;
1758   int src_x, src_y;
1759
1760   getSizedGraphicSource(graphic, frame, tilesize, &src_bitmap, &src_x, &src_y);
1761   BlitBitmap(src_bitmap, d, src_x, src_y, tilesize, tilesize, x, y);
1762 }
1763
1764 void DrawSizedGraphicThruMaskExt(DrawBuffer *d, int x, int y, int graphic,
1765                                  int frame, int tilesize)
1766 {
1767   Bitmap *src_bitmap;
1768   int src_x, src_y;
1769
1770   getSizedGraphicSource(graphic, frame, tilesize, &src_bitmap, &src_x, &src_y);
1771   BlitBitmapMasked(src_bitmap, d, src_x, src_y, tilesize, tilesize, x, y);
1772 }
1773
1774 void DrawMiniGraphic(int x, int y, int graphic)
1775 {
1776   DrawMiniGraphicExt(drawto, SX + x * MINI_TILEX,SY + y * MINI_TILEY, graphic);
1777   MarkTileDirty(x / 2, y / 2);
1778 }
1779
1780 void DrawMiniGraphicExt(DrawBuffer *d, int x, int y, int graphic)
1781 {
1782   Bitmap *src_bitmap;
1783   int src_x, src_y;
1784
1785   getMiniGraphicSource(graphic, &src_bitmap, &src_x, &src_y);
1786   BlitBitmap(src_bitmap, d, src_x, src_y, MINI_TILEX, MINI_TILEY, x, y);
1787 }
1788
1789 static void DrawGraphicShiftedNormal(int x, int y, int dx, int dy,
1790                                      int graphic, int frame,
1791                                      int cut_mode, int mask_mode)
1792 {
1793   Bitmap *src_bitmap;
1794   int src_x, src_y;
1795   int dst_x, dst_y;
1796   int width = TILEX, height = TILEY;
1797   int cx = 0, cy = 0;
1798
1799   if (dx || dy)                 // shifted graphic
1800   {
1801     if (x < BX1)                // object enters playfield from the left
1802     {
1803       x = BX1;
1804       width = dx;
1805       cx = TILEX - dx;
1806       dx = 0;
1807     }
1808     else if (x > BX2)           // object enters playfield from the right
1809     {
1810       x = BX2;
1811       width = -dx;
1812       dx = TILEX + dx;
1813     }
1814     else if (x == BX1 && dx < 0) // object leaves playfield to the left
1815     {
1816       width += dx;
1817       cx = -dx;
1818       dx = 0;
1819     }
1820     else if (x == BX2 && dx > 0) // object leaves playfield to the right
1821       width -= dx;
1822     else if (dx)                // general horizontal movement
1823       MarkTileDirty(x + SIGN(dx), y);
1824
1825     if (y < BY1)                // object enters playfield from the top
1826     {
1827       if (cut_mode == CUT_BELOW) // object completely above top border
1828         return;
1829
1830       y = BY1;
1831       height = dy;
1832       cy = TILEY - dy;
1833       dy = 0;
1834     }
1835     else if (y > BY2)           // object enters playfield from the bottom
1836     {
1837       y = BY2;
1838       height = -dy;
1839       dy = TILEY + dy;
1840     }
1841     else if (y == BY1 && dy < 0) // object leaves playfield to the top
1842     {
1843       height += dy;
1844       cy = -dy;
1845       dy = 0;
1846     }
1847     else if (dy > 0 && cut_mode == CUT_ABOVE)
1848     {
1849       if (y == BY2)             // object completely above bottom border
1850         return;
1851
1852       height = dy;
1853       cy = TILEY - dy;
1854       dy = TILEY;
1855       MarkTileDirty(x, y + 1);
1856     }                           // object leaves playfield to the bottom
1857     else if (dy > 0 && (y == BY2 || cut_mode == CUT_BELOW))
1858       height -= dy;
1859     else if (dy)                // general vertical movement
1860       MarkTileDirty(x, y + SIGN(dy));
1861   }
1862
1863 #if DEBUG
1864   if (!IN_SCR_FIELD(x, y))
1865   {
1866     printf("DrawGraphicShifted(): x = %d, y = %d, graphic = %d\n",x,y,graphic);
1867     printf("DrawGraphicShifted(): This should never happen!\n");
1868     return;
1869   }
1870 #endif
1871
1872   width = width * TILESIZE_VAR / TILESIZE;
1873   height = height * TILESIZE_VAR / TILESIZE;
1874   cx = cx * TILESIZE_VAR / TILESIZE;
1875   cy = cy * TILESIZE_VAR / TILESIZE;
1876   dx = dx * TILESIZE_VAR / TILESIZE;
1877   dy = dy * TILESIZE_VAR / TILESIZE;
1878
1879   if (width > 0 && height > 0)
1880   {
1881     getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1882
1883     src_x += cx;
1884     src_y += cy;
1885
1886     dst_x = FX + x * TILEX_VAR + dx;
1887     dst_y = FY + y * TILEY_VAR + dy;
1888
1889     if (mask_mode == USE_MASKING)
1890       BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
1891                        dst_x, dst_y);
1892     else
1893       BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
1894                  dst_x, dst_y);
1895
1896     MarkTileDirty(x, y);
1897   }
1898 }
1899
1900 static void DrawGraphicShiftedDouble(int x, int y, int dx, int dy,
1901                                      int graphic, int frame,
1902                                      int cut_mode, int mask_mode)
1903 {
1904   Bitmap *src_bitmap;
1905   int src_x, src_y;
1906   int dst_x, dst_y;
1907   int width = TILEX_VAR, height = TILEY_VAR;
1908   int x1 = x;
1909   int y1 = y;
1910   int x2 = x + SIGN(dx);
1911   int y2 = y + SIGN(dy);
1912
1913   // movement with two-tile animations must be sync'ed with movement position,
1914   // not with current GfxFrame (which can be higher when using slow movement)
1915   int anim_pos = (dx ? ABS(dx) : ABS(dy));
1916   int anim_frames = graphic_info[graphic].anim_frames;
1917
1918   // (we also need anim_delay here for movement animations with less frames)
1919   int anim_delay = graphic_info[graphic].anim_delay;
1920   int sync_frame = anim_pos * anim_frames * anim_delay / TILESIZE;
1921
1922   boolean draw_start_tile = (cut_mode != CUT_ABOVE);    // only for falling!
1923   boolean draw_end_tile   = (cut_mode != CUT_BELOW);    // only for falling!
1924
1925   // re-calculate animation frame for two-tile movement animation
1926   frame = getGraphicAnimationFrame(graphic, sync_frame);
1927
1928   // check if movement start graphic inside screen area and should be drawn
1929   if (draw_start_tile && IN_SCR_FIELD(x1, y1))
1930   {
1931     getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y, TRUE);
1932
1933     dst_x = FX + x1 * TILEX_VAR;
1934     dst_y = FY + y1 * TILEY_VAR;
1935
1936     if (mask_mode == USE_MASKING)
1937       BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
1938                        dst_x, dst_y);
1939     else
1940       BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
1941                  dst_x, dst_y);
1942
1943     MarkTileDirty(x1, y1);
1944   }
1945
1946   // check if movement end graphic inside screen area and should be drawn
1947   if (draw_end_tile && IN_SCR_FIELD(x2, y2))
1948   {
1949     getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y, FALSE);
1950
1951     dst_x = FX + x2 * TILEX_VAR;
1952     dst_y = FY + y2 * TILEY_VAR;
1953
1954     if (mask_mode == USE_MASKING)
1955       BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
1956                        dst_x, dst_y);
1957     else
1958       BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
1959                  dst_x, dst_y);
1960
1961     MarkTileDirty(x2, y2);
1962   }
1963 }
1964
1965 static void DrawGraphicShifted(int x, int y, int dx, int dy,
1966                                int graphic, int frame,
1967                                int cut_mode, int mask_mode)
1968 {
1969   if (graphic < 0)
1970   {
1971     DrawGraphic(x, y, graphic, frame);
1972
1973     return;
1974   }
1975
1976   if (graphic_info[graphic].double_movement)    // EM style movement images
1977     DrawGraphicShiftedDouble(x, y, dx, dy, graphic, frame, cut_mode,mask_mode);
1978   else
1979     DrawGraphicShiftedNormal(x, y, dx, dy, graphic, frame, cut_mode,mask_mode);
1980 }
1981
1982 static void DrawGraphicShiftedThruMask(int x, int y, int dx, int dy,
1983                                        int graphic, int frame, int cut_mode)
1984 {
1985   DrawGraphicShifted(x, y, dx, dy, graphic, frame, cut_mode, USE_MASKING);
1986 }
1987
1988 void DrawScreenElementExt(int x, int y, int dx, int dy, int element,
1989                           int cut_mode, int mask_mode)
1990 {
1991   int lx = LEVELX(x), ly = LEVELY(y);
1992   int graphic;
1993   int frame;
1994
1995   if (IN_LEV_FIELD(lx, ly))
1996   {
1997     SetRandomAnimationValue(lx, ly);
1998
1999     graphic = el_act_dir2img(element, GfxAction[lx][ly], GfxDir[lx][ly]);
2000     frame = getGraphicAnimationFrame(graphic, GfxFrame[lx][ly]);
2001
2002     // do not use double (EM style) movement graphic when not moving
2003     if (graphic_info[graphic].double_movement && !dx && !dy)
2004     {
2005       graphic = el_act_dir2img(element, ACTION_DEFAULT, GfxDir[lx][ly]);
2006       frame = getGraphicAnimationFrame(graphic, GfxFrame[lx][ly]);
2007     }
2008   }
2009   else  // border element
2010   {
2011     graphic = el2img(element);
2012     frame = getGraphicAnimationFrame(graphic, -1);
2013   }
2014
2015   if (element == EL_EXPANDABLE_WALL)
2016   {
2017     boolean left_stopped = FALSE, right_stopped = FALSE;
2018
2019     if (!IN_LEV_FIELD(lx - 1, ly) || IS_WALL(Feld[lx - 1][ly]))
2020       left_stopped = TRUE;
2021     if (!IN_LEV_FIELD(lx + 1, ly) || IS_WALL(Feld[lx + 1][ly]))
2022       right_stopped = TRUE;
2023
2024     if (left_stopped && right_stopped)
2025       graphic = IMG_WALL;
2026     else if (left_stopped)
2027     {
2028       graphic = IMG_EXPANDABLE_WALL_GROWING_RIGHT;
2029       frame = graphic_info[graphic].anim_frames - 1;
2030     }
2031     else if (right_stopped)
2032     {
2033       graphic = IMG_EXPANDABLE_WALL_GROWING_LEFT;
2034       frame = graphic_info[graphic].anim_frames - 1;
2035     }
2036   }
2037
2038   if (dx || dy)
2039     DrawGraphicShifted(x, y, dx, dy, graphic, frame, cut_mode, mask_mode);
2040   else if (mask_mode == USE_MASKING)
2041     DrawGraphicThruMask(x, y, graphic, frame);
2042   else
2043     DrawGraphic(x, y, graphic, frame);
2044 }
2045
2046 void DrawLevelElementExt(int x, int y, int dx, int dy, int element,
2047                          int cut_mode, int mask_mode)
2048 {
2049   if (IN_LEV_FIELD(x, y) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
2050     DrawScreenElementExt(SCREENX(x), SCREENY(y), dx, dy, element,
2051                          cut_mode, mask_mode);
2052 }
2053
2054 void DrawScreenElementShifted(int x, int y, int dx, int dy, int element,
2055                               int cut_mode)
2056 {
2057   DrawScreenElementExt(x, y, dx, dy, element, cut_mode, NO_MASKING);
2058 }
2059
2060 void DrawLevelElementShifted(int x, int y, int dx, int dy, int element,
2061                              int cut_mode)
2062 {
2063   DrawLevelElementExt(x, y, dx, dy, element, cut_mode, NO_MASKING);
2064 }
2065
2066 void DrawLevelElementThruMask(int x, int y, int element)
2067 {
2068   DrawLevelElementExt(x, y, 0, 0, element, NO_CUTTING, USE_MASKING);
2069 }
2070
2071 void DrawLevelFieldThruMask(int x, int y)
2072 {
2073   DrawLevelElementExt(x, y, 0, 0, Feld[x][y], NO_CUTTING, USE_MASKING);
2074 }
2075
2076 // !!! implementation of quicksand is totally broken !!!
2077 #define IS_CRUMBLED_TILE(x, y, e)                                       \
2078         (GFX_CRUMBLED(e) && (!IN_LEV_FIELD(x, y) ||                     \
2079                              !IS_MOVING(x, y) ||                        \
2080                              (e) == EL_QUICKSAND_EMPTYING ||            \
2081                              (e) == EL_QUICKSAND_FAST_EMPTYING))
2082
2083 static void DrawLevelFieldCrumbledInnerCorners(int x, int y, int dx, int dy,
2084                                                int graphic)
2085 {
2086   Bitmap *src_bitmap;
2087   int src_x, src_y;
2088   int width, height, cx, cy;
2089   int sx = SCREENX(x), sy = SCREENY(y);
2090   int crumbled_border_size = graphic_info[graphic].border_size;
2091   int crumbled_tile_size = graphic_info[graphic].tile_size;
2092   int crumbled_border_size_var =
2093     crumbled_border_size * TILESIZE_VAR / crumbled_tile_size;
2094   int i;
2095
2096   getGraphicSource(graphic, 0, &src_bitmap, &src_x, &src_y);
2097
2098   for (i = 1; i < 4; i++)
2099   {
2100     int dxx = (i & 1 ? dx : 0);
2101     int dyy = (i & 2 ? dy : 0);
2102     int xx = x + dxx;
2103     int yy = y + dyy;
2104     int element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
2105                    BorderElement);
2106
2107     // check if neighbour field is of same crumble type
2108     boolean same = (IS_CRUMBLED_TILE(xx, yy, element) &&
2109                     graphic_info[graphic].class ==
2110                     graphic_info[el_act2crm(element, ACTION_DEFAULT)].class);
2111
2112     // return if check prevents inner corner
2113     if (same == (dxx == dx && dyy == dy))
2114       return;
2115   }
2116
2117   // if we reach this point, we have an inner corner
2118
2119   getGraphicSource(graphic, 1, &src_bitmap, &src_x, &src_y);
2120
2121   width  = crumbled_border_size_var;
2122   height = crumbled_border_size_var;
2123   cx = (dx > 0 ? TILESIZE_VAR - width  : 0);
2124   cy = (dy > 0 ? TILESIZE_VAR - height : 0);
2125
2126   BlitBitmap(src_bitmap, drawto_field, src_x + cx, src_y + cy,
2127              width, height, FX + sx * TILEX_VAR + cx, FY + sy * TILEY_VAR + cy);
2128 }
2129
2130 static void DrawLevelFieldCrumbledBorders(int x, int y, int graphic, int frame,
2131                                           int dir)
2132 {
2133   Bitmap *src_bitmap;
2134   int src_x, src_y;
2135   int width, height, bx, by, cx, cy;
2136   int sx = SCREENX(x), sy = SCREENY(y);
2137   int crumbled_border_size = graphic_info[graphic].border_size;
2138   int crumbled_tile_size = graphic_info[graphic].tile_size;
2139   int crumbled_border_size_var =
2140     crumbled_border_size * TILESIZE_VAR / crumbled_tile_size;
2141   int crumbled_border_pos_var = TILESIZE_VAR - crumbled_border_size_var;
2142   int i;
2143
2144   getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
2145
2146   // draw simple, sloppy, non-corner-accurate crumbled border
2147
2148   width  = (dir == 1 || dir == 2 ? crumbled_border_size_var : TILESIZE_VAR);
2149   height = (dir == 0 || dir == 3 ? crumbled_border_size_var : TILESIZE_VAR);
2150   cx = (dir == 2 ? crumbled_border_pos_var : 0);
2151   cy = (dir == 3 ? crumbled_border_pos_var : 0);
2152
2153   BlitBitmap(src_bitmap, drawto_field, src_x + cx, src_y + cy, width, height,
2154              FX + sx * TILEX_VAR + cx,
2155              FY + sy * TILEY_VAR + cy);
2156
2157   // (remaining middle border part must be at least as big as corner part)
2158   if (!(graphic_info[graphic].style & STYLE_ACCURATE_BORDERS) ||
2159       crumbled_border_size_var >= TILESIZE_VAR / 3)
2160     return;
2161
2162   // correct corners of crumbled border, if needed
2163
2164   for (i = -1; i <= 1; i += 2)
2165   {
2166     int xx = x + (dir == 0 || dir == 3 ? i : 0);
2167     int yy = y + (dir == 1 || dir == 2 ? i : 0);
2168     int element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
2169                    BorderElement);
2170
2171     // check if neighbour field is of same crumble type
2172     if (IS_CRUMBLED_TILE(xx, yy, element) &&
2173         graphic_info[graphic].class ==
2174         graphic_info[el_act2crm(element, ACTION_DEFAULT)].class)
2175     {
2176       // no crumbled corner, but continued crumbled border
2177
2178       int c1 = (dir == 2 || dir == 3 ? crumbled_border_pos_var : 0);
2179       int c2 = (i == 1 ? crumbled_border_pos_var : 0);
2180       int b1 = (i == 1 ? crumbled_border_size_var :
2181                 TILESIZE_VAR - 2 * crumbled_border_size_var);
2182
2183       width  = crumbled_border_size_var;
2184       height = crumbled_border_size_var;
2185
2186       if (dir == 1 || dir == 2)
2187       {
2188         cx = c1;
2189         cy = c2;
2190         bx = cx;
2191         by = b1;
2192       }
2193       else
2194       {
2195         cx = c2;
2196         cy = c1;
2197         bx = b1;
2198         by = cy;
2199       }
2200
2201       BlitBitmap(src_bitmap, drawto_field, src_x + bx, src_y + by,
2202                  width, height,
2203                  FX + sx * TILEX_VAR + cx,
2204                  FY + sy * TILEY_VAR + cy);
2205     }
2206   }
2207 }
2208
2209 static void DrawLevelFieldCrumbledExt(int x, int y, int graphic, int frame)
2210 {
2211   int sx = SCREENX(x), sy = SCREENY(y);
2212   int element;
2213   int i;
2214   static int xy[4][2] =
2215   {
2216     { 0, -1 },
2217     { -1, 0 },
2218     { +1, 0 },
2219     { 0, +1 }
2220   };
2221
2222   if (!IN_LEV_FIELD(x, y))
2223     return;
2224
2225   element = TILE_GFX_ELEMENT(x, y);
2226
2227   if (IS_CRUMBLED_TILE(x, y, element))          // crumble field itself
2228   {
2229     if (!IN_SCR_FIELD(sx, sy))
2230       return;
2231
2232     // crumble field borders towards direct neighbour fields
2233     for (i = 0; i < 4; i++)
2234     {
2235       int xx = x + xy[i][0];
2236       int yy = y + xy[i][1];
2237
2238       element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
2239                  BorderElement);
2240
2241       // check if neighbour field is of same crumble type
2242       if (IS_CRUMBLED_TILE(xx, yy, element) &&
2243           graphic_info[graphic].class ==
2244           graphic_info[el_act2crm(element, ACTION_DEFAULT)].class)
2245         continue;
2246
2247       DrawLevelFieldCrumbledBorders(x, y, graphic, frame, i);
2248     }
2249
2250     // crumble inner field corners towards corner neighbour fields
2251     if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
2252         graphic_info[graphic].anim_frames == 2)
2253     {
2254       for (i = 0; i < 4; i++)
2255       {
2256         int dx = (i & 1 ? +1 : -1);
2257         int dy = (i & 2 ? +1 : -1);
2258
2259         DrawLevelFieldCrumbledInnerCorners(x, y, dx, dy, graphic);
2260       }
2261     }
2262
2263     MarkTileDirty(sx, sy);
2264   }
2265   else          // center field is not crumbled -- crumble neighbour fields
2266   {
2267     // crumble field borders of direct neighbour fields
2268     for (i = 0; i < 4; i++)
2269     {
2270       int xx = x + xy[i][0];
2271       int yy = y + xy[i][1];
2272       int sxx = sx + xy[i][0];
2273       int syy = sy + xy[i][1];
2274
2275       if (!IN_LEV_FIELD(xx, yy) ||
2276           !IN_SCR_FIELD(sxx, syy))
2277         continue;
2278
2279       // do not crumble fields that are being digged or snapped
2280       if (Feld[xx][yy] == EL_EMPTY ||
2281           Feld[xx][yy] == EL_ELEMENT_SNAPPING)
2282         continue;
2283
2284       element = TILE_GFX_ELEMENT(xx, yy);
2285
2286       if (!IS_CRUMBLED_TILE(xx, yy, element))
2287         continue;
2288
2289       graphic = el_act2crm(element, ACTION_DEFAULT);
2290
2291       DrawLevelFieldCrumbledBorders(xx, yy, graphic, 0, 3 - i);
2292
2293       MarkTileDirty(sxx, syy);
2294     }
2295
2296     // crumble inner field corners of corner neighbour fields
2297     for (i = 0; i < 4; i++)
2298     {
2299       int dx = (i & 1 ? +1 : -1);
2300       int dy = (i & 2 ? +1 : -1);
2301       int xx = x + dx;
2302       int yy = y + dy;
2303       int sxx = sx + dx;
2304       int syy = sy + dy;
2305
2306       if (!IN_LEV_FIELD(xx, yy) ||
2307           !IN_SCR_FIELD(sxx, syy))
2308         continue;
2309
2310       if (Feld[xx][yy] == EL_ELEMENT_SNAPPING)
2311         continue;
2312
2313       element = TILE_GFX_ELEMENT(xx, yy);
2314
2315       if (!IS_CRUMBLED_TILE(xx, yy, element))
2316         continue;
2317
2318       graphic = el_act2crm(element, ACTION_DEFAULT);
2319
2320       if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
2321           graphic_info[graphic].anim_frames == 2)
2322         DrawLevelFieldCrumbledInnerCorners(xx, yy, -dx, -dy, graphic);
2323
2324       MarkTileDirty(sxx, syy);
2325     }
2326   }
2327 }
2328
2329 void DrawLevelFieldCrumbled(int x, int y)
2330 {
2331   int graphic;
2332
2333   if (!IN_LEV_FIELD(x, y))
2334     return;
2335
2336   if (Feld[x][y] == EL_ELEMENT_SNAPPING &&
2337       GfxElement[x][y] != EL_UNDEFINED &&
2338       GFX_CRUMBLED(GfxElement[x][y]))
2339   {
2340     DrawLevelFieldCrumbledDigging(x, y, GfxDir[x][y], GfxFrame[x][y]);
2341
2342     return;
2343   }
2344
2345   graphic = el_act2crm(TILE_GFX_ELEMENT(x, y), ACTION_DEFAULT);
2346
2347   DrawLevelFieldCrumbledExt(x, y, graphic, 0);
2348 }
2349
2350 void DrawLevelFieldCrumbledDigging(int x, int y, int direction,
2351                                    int step_frame)
2352 {
2353   int graphic1 = el_act_dir2img(GfxElement[x][y], ACTION_DIGGING, direction);
2354   int graphic2 = el_act_dir2crm(GfxElement[x][y], ACTION_DIGGING, direction);
2355   int frame1 = getGraphicAnimationFrame(graphic1, step_frame);
2356   int frame2 = getGraphicAnimationFrame(graphic2, step_frame);
2357   int sx = SCREENX(x), sy = SCREENY(y);
2358
2359   DrawGraphic(sx, sy, graphic1, frame1);
2360   DrawLevelFieldCrumbledExt(x, y, graphic2, frame2);
2361 }
2362
2363 void DrawLevelFieldCrumbledNeighbours(int x, int y)
2364 {
2365   int sx = SCREENX(x), sy = SCREENY(y);
2366   static int xy[4][2] =
2367   {
2368     { 0, -1 },
2369     { -1, 0 },
2370     { +1, 0 },
2371     { 0, +1 }
2372   };
2373   int i;
2374
2375   // crumble direct neighbour fields (required for field borders)
2376   for (i = 0; i < 4; i++)
2377   {
2378     int xx = x + xy[i][0];
2379     int yy = y + xy[i][1];
2380     int sxx = sx + xy[i][0];
2381     int syy = sy + xy[i][1];
2382
2383     if (!IN_LEV_FIELD(xx, yy) ||
2384         !IN_SCR_FIELD(sxx, syy) ||
2385         !GFX_CRUMBLED(Feld[xx][yy]) ||
2386         IS_MOVING(xx, yy))
2387       continue;
2388
2389     DrawLevelField(xx, yy);
2390   }
2391
2392   // crumble corner neighbour fields (required for inner field corners)
2393   for (i = 0; i < 4; i++)
2394   {
2395     int dx = (i & 1 ? +1 : -1);
2396     int dy = (i & 2 ? +1 : -1);
2397     int xx = x + dx;
2398     int yy = y + dy;
2399     int sxx = sx + dx;
2400     int syy = sy + dy;
2401
2402     if (!IN_LEV_FIELD(xx, yy) ||
2403         !IN_SCR_FIELD(sxx, syy) ||
2404         !GFX_CRUMBLED(Feld[xx][yy]) ||
2405         IS_MOVING(xx, yy))
2406       continue;
2407
2408     int element = TILE_GFX_ELEMENT(xx, yy);
2409     int graphic = el_act2crm(element, ACTION_DEFAULT);
2410
2411     if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
2412         graphic_info[graphic].anim_frames == 2)
2413       DrawLevelField(xx, yy);
2414   }
2415 }
2416
2417 static int getBorderElement(int x, int y)
2418 {
2419   int border[7][2] =
2420   {
2421     { EL_STEELWALL_TOPLEFT,             EL_INVISIBLE_STEELWALL_TOPLEFT     },
2422     { EL_STEELWALL_TOPRIGHT,            EL_INVISIBLE_STEELWALL_TOPRIGHT    },
2423     { EL_STEELWALL_BOTTOMLEFT,          EL_INVISIBLE_STEELWALL_BOTTOMLEFT  },
2424     { EL_STEELWALL_BOTTOMRIGHT,         EL_INVISIBLE_STEELWALL_BOTTOMRIGHT },
2425     { EL_STEELWALL_VERTICAL,            EL_INVISIBLE_STEELWALL_VERTICAL    },
2426     { EL_STEELWALL_HORIZONTAL,          EL_INVISIBLE_STEELWALL_HORIZONTAL  },
2427     { EL_STEELWALL,                     EL_INVISIBLE_STEELWALL             }
2428   };
2429   int steel_type = (BorderElement == EL_STEELWALL ? 0 : 1);
2430   int steel_position = (x == -1         && y == -1              ? 0 :
2431                         x == lev_fieldx && y == -1              ? 1 :
2432                         x == -1         && y == lev_fieldy      ? 2 :
2433                         x == lev_fieldx && y == lev_fieldy      ? 3 :
2434                         x == -1         || x == lev_fieldx      ? 4 :
2435                         y == -1         || y == lev_fieldy      ? 5 : 6);
2436
2437   return border[steel_position][steel_type];
2438 }
2439
2440 void DrawScreenElement(int x, int y, int element)
2441 {
2442   DrawScreenElementExt(x, y, 0, 0, element, NO_CUTTING, NO_MASKING);
2443   DrawLevelFieldCrumbled(LEVELX(x), LEVELY(y));
2444 }
2445
2446 void DrawLevelElement(int x, int y, int element)
2447 {
2448   if (IN_LEV_FIELD(x, y) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
2449     DrawScreenElement(SCREENX(x), SCREENY(y), element);
2450 }
2451
2452 void DrawScreenField(int x, int y)
2453 {
2454   int lx = LEVELX(x), ly = LEVELY(y);
2455   int element, content;
2456
2457   if (!IN_LEV_FIELD(lx, ly))
2458   {
2459     if (lx < -1 || lx > lev_fieldx || ly < -1 || ly > lev_fieldy)
2460       element = EL_EMPTY;
2461     else
2462       element = getBorderElement(lx, ly);
2463
2464     DrawScreenElement(x, y, element);
2465
2466     return;
2467   }
2468
2469   element = Feld[lx][ly];
2470   content = Store[lx][ly];
2471
2472   if (IS_MOVING(lx, ly))
2473   {
2474     int horiz_move = (MovDir[lx][ly] == MV_LEFT || MovDir[lx][ly] == MV_RIGHT);
2475     boolean cut_mode = NO_CUTTING;
2476
2477     if (element == EL_QUICKSAND_EMPTYING ||
2478         element == EL_QUICKSAND_FAST_EMPTYING ||
2479         element == EL_MAGIC_WALL_EMPTYING ||
2480         element == EL_BD_MAGIC_WALL_EMPTYING ||
2481         element == EL_DC_MAGIC_WALL_EMPTYING ||
2482         element == EL_AMOEBA_DROPPING)
2483       cut_mode = CUT_ABOVE;
2484     else if (element == EL_QUICKSAND_FILLING ||
2485              element == EL_QUICKSAND_FAST_FILLING ||
2486              element == EL_MAGIC_WALL_FILLING ||
2487              element == EL_BD_MAGIC_WALL_FILLING ||
2488              element == EL_DC_MAGIC_WALL_FILLING)
2489       cut_mode = CUT_BELOW;
2490
2491     if (cut_mode == CUT_ABOVE)
2492       DrawScreenElement(x, y, element);
2493     else
2494       DrawScreenElement(x, y, EL_EMPTY);
2495
2496     if (horiz_move)
2497       DrawScreenElementShifted(x, y, MovPos[lx][ly], 0, element, NO_CUTTING);
2498     else if (cut_mode == NO_CUTTING)
2499       DrawScreenElementShifted(x, y, 0, MovPos[lx][ly], element, cut_mode);
2500     else
2501     {
2502       DrawScreenElementShifted(x, y, 0, MovPos[lx][ly], content, cut_mode);
2503
2504       if (cut_mode == CUT_BELOW &&
2505           IN_LEV_FIELD(lx, ly + 1) && IN_SCR_FIELD(x, y + 1))
2506         DrawLevelElement(lx, ly + 1, element);
2507     }
2508
2509     if (content == EL_ACID)
2510     {
2511       int dir = MovDir[lx][ly];
2512       int newlx = lx + (dir == MV_LEFT ? -1 : dir == MV_RIGHT ? +1 : 0);
2513       int newly = ly + (dir == MV_UP   ? -1 : dir == MV_DOWN  ? +1 : 0);
2514
2515       DrawLevelElementThruMask(newlx, newly, EL_ACID);
2516
2517       // prevent target field from being drawn again (but without masking)
2518       // (this would happen if target field is scanned after moving element)
2519       Stop[newlx][newly] = TRUE;
2520     }
2521   }
2522   else if (IS_BLOCKED(lx, ly))
2523   {
2524     int oldx, oldy;
2525     int sx, sy;
2526     int horiz_move;
2527     boolean cut_mode = NO_CUTTING;
2528     int element_old, content_old;
2529
2530     Blocked2Moving(lx, ly, &oldx, &oldy);
2531     sx = SCREENX(oldx);
2532     sy = SCREENY(oldy);
2533     horiz_move = (MovDir[oldx][oldy] == MV_LEFT ||
2534                   MovDir[oldx][oldy] == MV_RIGHT);
2535
2536     element_old = Feld[oldx][oldy];
2537     content_old = Store[oldx][oldy];
2538
2539     if (element_old == EL_QUICKSAND_EMPTYING ||
2540         element_old == EL_QUICKSAND_FAST_EMPTYING ||
2541         element_old == EL_MAGIC_WALL_EMPTYING ||
2542         element_old == EL_BD_MAGIC_WALL_EMPTYING ||
2543         element_old == EL_DC_MAGIC_WALL_EMPTYING ||
2544         element_old == EL_AMOEBA_DROPPING)
2545       cut_mode = CUT_ABOVE;
2546
2547     DrawScreenElement(x, y, EL_EMPTY);
2548
2549     if (horiz_move)
2550       DrawScreenElementShifted(sx, sy, MovPos[oldx][oldy], 0, element_old,
2551                                NO_CUTTING);
2552     else if (cut_mode == NO_CUTTING)
2553       DrawScreenElementShifted(sx, sy, 0, MovPos[oldx][oldy], element_old,
2554                                cut_mode);
2555     else
2556       DrawScreenElementShifted(sx, sy, 0, MovPos[oldx][oldy], content_old,
2557                                cut_mode);
2558   }
2559   else if (IS_DRAWABLE(element))
2560     DrawScreenElement(x, y, element);
2561   else
2562     DrawScreenElement(x, y, EL_EMPTY);
2563 }
2564
2565 void DrawLevelField(int x, int y)
2566 {
2567   if (IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
2568     DrawScreenField(SCREENX(x), SCREENY(y));
2569   else if (IS_MOVING(x, y))
2570   {
2571     int newx,newy;
2572
2573     Moving2Blocked(x, y, &newx, &newy);
2574     if (IN_SCR_FIELD(SCREENX(newx), SCREENY(newy)))
2575       DrawScreenField(SCREENX(newx), SCREENY(newy));
2576   }
2577   else if (IS_BLOCKED(x, y))
2578   {
2579     int oldx, oldy;
2580
2581     Blocked2Moving(x, y, &oldx, &oldy);
2582     if (IN_SCR_FIELD(SCREENX(oldx), SCREENY(oldy)))
2583       DrawScreenField(SCREENX(oldx), SCREENY(oldy));
2584   }
2585 }
2586
2587 static void DrawSizedWallExt_MM(int dst_x, int dst_y, int element, int tilesize,
2588                                 int (*el2img_function)(int), boolean masked,
2589                                 int element_bits_draw)
2590 {
2591   int element_base = map_mm_wall_element(element);
2592   int element_bits = (IS_DF_WALL(element) ?
2593                       element - EL_DF_WALL_START :
2594                       IS_MM_WALL(element) ?
2595                       element - EL_MM_WALL_START : EL_EMPTY) & 0x000f;
2596   int graphic = el2img_function(element_base);
2597   int tilesize_draw = tilesize / 2;
2598   Bitmap *src_bitmap;
2599   int src_x, src_y;
2600   int i;
2601
2602   getSizedGraphicSource(graphic, 0, tilesize_draw, &src_bitmap, &src_x, &src_y);
2603
2604   for (i = 0; i < 4; i++)
2605   {
2606     int dst_draw_x = dst_x + (i % 2) * tilesize_draw;
2607     int dst_draw_y = dst_y + (i / 2) * tilesize_draw;
2608
2609     if (!(element_bits_draw & (1 << i)))
2610       continue;
2611
2612     if (element_bits & (1 << i))
2613     {
2614       if (masked)
2615         BlitBitmapMasked(src_bitmap, drawto, src_x, src_y,
2616                          tilesize_draw, tilesize_draw, dst_draw_x, dst_draw_y);
2617       else
2618         BlitBitmap(src_bitmap, drawto, src_x, src_y,
2619                    tilesize_draw, tilesize_draw, dst_draw_x, dst_draw_y);
2620     }
2621     else
2622     {
2623       if (!masked)
2624         ClearRectangle(drawto, dst_draw_x, dst_draw_y,
2625                        tilesize_draw, tilesize_draw);
2626     }
2627   }
2628 }
2629
2630 void DrawSizedWallParts_MM(int x, int y, int element, int tilesize,
2631                            boolean masked, int element_bits_draw)
2632 {
2633   DrawSizedWallExt_MM(SX + x * tilesize, SY + y * tilesize,
2634                       element, tilesize, el2edimg, masked, element_bits_draw);
2635 }
2636
2637 static void DrawSizedWall_MM(int dst_x, int dst_y, int element, int tilesize,
2638                              int (*el2img_function)(int))
2639 {
2640   DrawSizedWallExt_MM(dst_x, dst_y, element, tilesize, el2img_function, FALSE,
2641                       0x000f);
2642 }
2643
2644 static void DrawSizedElementExt(int x, int y, int element, int tilesize,
2645                                 boolean masked)
2646 {
2647   if (IS_MM_WALL(element))
2648   {
2649     DrawSizedWallExt_MM(SX + x * tilesize, SY + y * tilesize,
2650                         element, tilesize, el2edimg, masked, 0x000f);
2651   }
2652   else
2653   {
2654     int graphic = el2edimg(element);
2655
2656     if (masked)
2657       DrawSizedGraphicThruMask(x, y, graphic, 0, tilesize);
2658     else
2659       DrawSizedGraphic(x, y, graphic, 0, tilesize);
2660   }
2661 }
2662
2663 void DrawSizedElement(int x, int y, int element, int tilesize)
2664 {
2665   DrawSizedElementExt(x, y, element, tilesize, FALSE);
2666 }
2667
2668 void DrawSizedElementThruMask(int x, int y, int element, int tilesize)
2669 {
2670   DrawSizedElementExt(x, y, element, tilesize, TRUE);
2671 }
2672
2673 void DrawMiniElement(int x, int y, int element)
2674 {
2675   int graphic;
2676
2677   graphic = el2edimg(element);
2678   DrawMiniGraphic(x, y, graphic);
2679 }
2680
2681 void DrawSizedElementOrWall(int sx, int sy, int scroll_x, int scroll_y,
2682                             int tilesize)
2683 {
2684   int x = sx + scroll_x, y = sy + scroll_y;
2685
2686   if (x < -1 || x > lev_fieldx || y < -1 || y > lev_fieldy)
2687     DrawSizedElement(sx, sy, EL_EMPTY, tilesize);
2688   else if (x > -1 && x < lev_fieldx && y > -1 && y < lev_fieldy)
2689     DrawSizedElement(sx, sy, Feld[x][y], tilesize);
2690   else
2691     DrawSizedGraphic(sx, sy, el2edimg(getBorderElement(x, y)), 0, tilesize);
2692 }
2693
2694 void DrawMiniElementOrWall(int sx, int sy, int scroll_x, int scroll_y)
2695 {
2696   int x = sx + scroll_x, y = sy + scroll_y;
2697
2698   if (x < -1 || x > lev_fieldx || y < -1 || y > lev_fieldy)
2699     DrawMiniElement(sx, sy, EL_EMPTY);
2700   else if (x > -1 && x < lev_fieldx && y > -1 && y < lev_fieldy)
2701     DrawMiniElement(sx, sy, Feld[x][y]);
2702   else
2703     DrawMiniGraphic(sx, sy, el2edimg(getBorderElement(x, y)));
2704 }
2705
2706 static void DrawEnvelopeBackgroundTiles(int graphic, int startx, int starty,
2707                                         int x, int y, int xsize, int ysize,
2708                                         int tile_width, int tile_height)
2709 {
2710   Bitmap *src_bitmap;
2711   int src_x, src_y;
2712   int dst_x = startx + x * tile_width;
2713   int dst_y = starty + y * tile_height;
2714   int width  = graphic_info[graphic].width;
2715   int height = graphic_info[graphic].height;
2716   int inner_width_raw  = MAX(width  - 2 * tile_width,  tile_width);
2717   int inner_height_raw = MAX(height - 2 * tile_height, tile_height);
2718   int inner_width  = inner_width_raw  - (inner_width_raw  % tile_width);
2719   int inner_height = inner_height_raw - (inner_height_raw % tile_height);
2720   int inner_sx = (width  >= 3 * tile_width  ? tile_width  : 0);
2721   int inner_sy = (height >= 3 * tile_height ? tile_height : 0);
2722   boolean draw_masked = graphic_info[graphic].draw_masked;
2723
2724   getFixedGraphicSource(graphic, 0, &src_bitmap, &src_x, &src_y);
2725
2726   if (src_bitmap == NULL || width < tile_width || height < tile_height)
2727   {
2728     ClearRectangle(drawto, dst_x, dst_y, tile_width, tile_height);
2729     return;
2730   }
2731
2732   src_x += (x == 0 ? 0 : x == xsize - 1 ? width  - tile_width  :
2733             inner_sx + (x - 1) * tile_width  % inner_width);
2734   src_y += (y == 0 ? 0 : y == ysize - 1 ? height - tile_height :
2735             inner_sy + (y - 1) * tile_height % inner_height);
2736
2737   if (draw_masked)
2738     BlitBitmapMasked(src_bitmap, drawto, src_x, src_y, tile_width, tile_height,
2739                      dst_x, dst_y);
2740   else
2741     BlitBitmap(src_bitmap, drawto, src_x, src_y, tile_width, tile_height,
2742                dst_x, dst_y);
2743 }
2744
2745 static void DrawEnvelopeBackground(int graphic, int startx, int starty,
2746                                    int x, int y, int xsize, int ysize,
2747                                    int font_nr)
2748 {
2749   int font_width  = getFontWidth(font_nr);
2750   int font_height = getFontHeight(font_nr);
2751
2752   DrawEnvelopeBackgroundTiles(graphic, startx, starty, x, y, xsize, ysize,
2753                               font_width, font_height);
2754 }
2755
2756 static void AnimateEnvelope(int envelope_nr, int anim_mode, int action)
2757 {
2758   int graphic = IMG_BACKGROUND_ENVELOPE_1 + envelope_nr;
2759   Bitmap *src_bitmap = graphic_info[graphic].bitmap;
2760   int mask_mode = (src_bitmap != NULL ? BLIT_MASKED : BLIT_ON_BACKGROUND);
2761   boolean ffwd_delay = (tape.playing && tape.fast_forward);
2762   boolean no_delay = (tape.warp_forward);
2763   unsigned int anim_delay = 0;
2764   int frame_delay_value = (ffwd_delay ? FfwdFrameDelay : GameFrameDelay);
2765   int anim_delay_value = MAX(1, (no_delay ? 0 : frame_delay_value) / 2);
2766   int font_nr = FONT_ENVELOPE_1 + envelope_nr;
2767   int font_width = getFontWidth(font_nr);
2768   int font_height = getFontHeight(font_nr);
2769   int max_xsize = level.envelope[envelope_nr].xsize;
2770   int max_ysize = level.envelope[envelope_nr].ysize;
2771   int xstart = (anim_mode & ANIM_VERTICAL ? max_xsize : 0);
2772   int ystart = (anim_mode & ANIM_HORIZONTAL ? max_ysize : 0);
2773   int xend = max_xsize;
2774   int yend = (anim_mode != ANIM_DEFAULT ? max_ysize : 0);
2775   int xstep = (xstart < xend ? 1 : 0);
2776   int ystep = (ystart < yend || xstep == 0 ? 1 : 0);
2777   int start = 0;
2778   int end = MAX(xend - xstart, yend - ystart);
2779   int i;
2780
2781   for (i = start; i <= end; i++)
2782   {
2783     int last_frame = end;       // last frame of this "for" loop
2784     int x = xstart + i * xstep;
2785     int y = ystart + i * ystep;
2786     int xsize = (action == ACTION_CLOSING ? xend - (x - xstart) : x) + 2;
2787     int ysize = (action == ACTION_CLOSING ? yend - (y - ystart) : y) + 2;
2788     int sx = SX + (SXSIZE - xsize * font_width)  / 2;
2789     int sy = SY + (SYSIZE - ysize * font_height) / 2;
2790     int xx, yy;
2791
2792     SetDrawtoField(DRAW_TO_FIELDBUFFER);
2793
2794     BlitScreenToBitmap(backbuffer);
2795
2796     SetDrawtoField(DRAW_TO_BACKBUFFER);
2797
2798     for (yy = 0; yy < ysize; yy++)
2799       for (xx = 0; xx < xsize; xx++)
2800         DrawEnvelopeBackground(graphic, sx, sy, xx, yy, xsize, ysize, font_nr);
2801
2802     DrawTextBuffer(sx + font_width, sy + font_height,
2803                    level.envelope[envelope_nr].text, font_nr, max_xsize,
2804                    xsize - 2, ysize - 2, 0, mask_mode,
2805                    level.envelope[envelope_nr].autowrap,
2806                    level.envelope[envelope_nr].centered, FALSE);
2807
2808     redraw_mask |= REDRAW_FIELD;
2809     BackToFront();
2810
2811     SkipUntilDelayReached(&anim_delay, anim_delay_value, &i, last_frame);
2812   }
2813
2814   ClearAutoRepeatKeyEvents();
2815 }
2816
2817 void ShowEnvelope(int envelope_nr)
2818 {
2819   int element = EL_ENVELOPE_1 + envelope_nr;
2820   int graphic = IMG_BACKGROUND_ENVELOPE_1 + envelope_nr;
2821   int sound_opening = element_info[element].sound[ACTION_OPENING];
2822   int sound_closing = element_info[element].sound[ACTION_CLOSING];
2823   boolean ffwd_delay = (tape.playing && tape.fast_forward);
2824   boolean no_delay = (tape.warp_forward);
2825   int normal_delay_value = ONE_SECOND_DELAY / (ffwd_delay ? 2 : 1);
2826   int wait_delay_value = (no_delay ? 0 : normal_delay_value);
2827   int anim_mode = graphic_info[graphic].anim_mode;
2828   int main_anim_mode = (anim_mode == ANIM_NONE ? ANIM_VERTICAL|ANIM_HORIZONTAL:
2829                         anim_mode == ANIM_DEFAULT ? ANIM_VERTICAL : anim_mode);
2830
2831   game.envelope_active = TRUE;  // needed for RedrawPlayfield() events
2832
2833   PlayMenuSoundStereo(sound_opening, SOUND_MIDDLE);
2834
2835   if (anim_mode == ANIM_DEFAULT)
2836     AnimateEnvelope(envelope_nr, ANIM_DEFAULT, ACTION_OPENING);
2837
2838   AnimateEnvelope(envelope_nr, main_anim_mode, ACTION_OPENING);
2839
2840   if (tape.playing)
2841     Delay(wait_delay_value);
2842   else
2843     WaitForEventToContinue();
2844
2845   PlayMenuSoundStereo(sound_closing, SOUND_MIDDLE);
2846
2847   if (anim_mode != ANIM_NONE)
2848     AnimateEnvelope(envelope_nr, main_anim_mode, ACTION_CLOSING);
2849
2850   if (anim_mode == ANIM_DEFAULT)
2851     AnimateEnvelope(envelope_nr, ANIM_DEFAULT, ACTION_CLOSING);
2852
2853   game.envelope_active = FALSE;
2854
2855   SetDrawtoField(DRAW_TO_FIELDBUFFER);
2856
2857   redraw_mask |= REDRAW_FIELD;
2858   BackToFront();
2859 }
2860
2861 static void setRequestBasePosition(int *x, int *y)
2862 {
2863   int sx_base, sy_base;
2864
2865   if (request.x != -1)
2866     sx_base = request.x;
2867   else if (request.align == ALIGN_LEFT)
2868     sx_base = SX;
2869   else if (request.align == ALIGN_RIGHT)
2870     sx_base = SX + SXSIZE;
2871   else
2872     sx_base = SX + SXSIZE / 2;
2873
2874   if (request.y != -1)
2875     sy_base = request.y;
2876   else if (request.valign == VALIGN_TOP)
2877     sy_base = SY;
2878   else if (request.valign == VALIGN_BOTTOM)
2879     sy_base = SY + SYSIZE;
2880   else
2881     sy_base = SY + SYSIZE / 2;
2882
2883   *x = sx_base;
2884   *y = sy_base;
2885 }
2886
2887 static void setRequestPositionExt(int *x, int *y, int width, int height,
2888                                   boolean add_border_size)
2889 {
2890   int border_size = request.border_size;
2891   int sx_base, sy_base;
2892   int sx, sy;
2893
2894   setRequestBasePosition(&sx_base, &sy_base);
2895
2896   if (request.align == ALIGN_LEFT)
2897     sx = sx_base;
2898   else if (request.align == ALIGN_RIGHT)
2899     sx = sx_base - width;
2900   else
2901     sx = sx_base - width  / 2;
2902
2903   if (request.valign == VALIGN_TOP)
2904     sy = sy_base;
2905   else if (request.valign == VALIGN_BOTTOM)
2906     sy = sy_base - height;
2907   else
2908     sy = sy_base - height / 2;
2909
2910   sx = MAX(0, MIN(sx, WIN_XSIZE - width));
2911   sy = MAX(0, MIN(sy, WIN_YSIZE - height));
2912
2913   if (add_border_size)
2914   {
2915     sx += border_size;
2916     sy += border_size;
2917   }
2918
2919   *x = sx;
2920   *y = sy;
2921 }
2922
2923 static void setRequestPosition(int *x, int *y, boolean add_border_size)
2924 {
2925   setRequestPositionExt(x, y, request.width, request.height, add_border_size);
2926 }
2927
2928 static void DrawEnvelopeRequest(char *text)
2929 {
2930   char *text_final = text;
2931   char *text_door_style = NULL;
2932   int graphic = IMG_BACKGROUND_REQUEST;
2933   Bitmap *src_bitmap = graphic_info[graphic].bitmap;
2934   int mask_mode = (src_bitmap != NULL ? BLIT_MASKED : BLIT_ON_BACKGROUND);
2935   int font_nr = FONT_REQUEST;
2936   int font_width = getFontWidth(font_nr);
2937   int font_height = getFontHeight(font_nr);
2938   int border_size = request.border_size;
2939   int line_spacing = request.line_spacing;
2940   int line_height = font_height + line_spacing;
2941   int max_text_width  = request.width  - 2 * border_size;
2942   int max_text_height = request.height - 2 * border_size;
2943   int line_length = max_text_width  / font_width;
2944   int max_lines   = max_text_height / line_height;
2945   int text_width = line_length * font_width;
2946   int width = request.width;
2947   int height = request.height;
2948   int tile_size = MAX(request.step_offset, 1);
2949   int x_steps = width  / tile_size;
2950   int y_steps = height / tile_size;
2951   int sx_offset = border_size;
2952   int sy_offset = border_size;
2953   int sx, sy;
2954   int i, x, y;
2955
2956   if (request.centered)
2957     sx_offset = (request.width - text_width) / 2;
2958
2959   if (request.wrap_single_words && !request.autowrap)
2960   {
2961     char *src_text_ptr, *dst_text_ptr;
2962
2963     text_door_style = checked_malloc(2 * strlen(text) + 1);
2964
2965     src_text_ptr = text;
2966     dst_text_ptr = text_door_style;
2967
2968     while (*src_text_ptr)
2969     {
2970       if (*src_text_ptr == ' ' ||
2971           *src_text_ptr == '?' ||
2972           *src_text_ptr == '!')
2973         *dst_text_ptr++ = '\n';
2974
2975       if (*src_text_ptr != ' ')
2976         *dst_text_ptr++ = *src_text_ptr;
2977
2978       src_text_ptr++;
2979     }
2980
2981     *dst_text_ptr = '\0';
2982
2983     text_final = text_door_style;
2984   }
2985
2986   setRequestPosition(&sx, &sy, FALSE);
2987
2988   ClearRectangle(backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE);
2989
2990   for (y = 0; y < y_steps; y++)
2991     for (x = 0; x < x_steps; x++)
2992       DrawEnvelopeBackgroundTiles(graphic, sx, sy,
2993                                   x, y, x_steps, y_steps,
2994                                   tile_size, tile_size);
2995
2996   // force DOOR font inside door area
2997   SetFontStatus(GAME_MODE_PSEUDO_DOOR);
2998
2999   DrawTextBuffer(sx + sx_offset, sy + sy_offset, text_final, font_nr,
3000                  line_length, -1, max_lines, line_spacing, mask_mode,
3001                  request.autowrap, request.centered, FALSE);
3002
3003   ResetFontStatus();
3004
3005   for (i = 0; i < NUM_TOOL_BUTTONS; i++)
3006     RedrawGadget(tool_gadget[i]);
3007
3008   // store readily prepared envelope request for later use when animating
3009   BlitBitmap(backbuffer, bitmap_db_store_2, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
3010
3011   if (text_door_style)
3012     free(text_door_style);
3013 }
3014
3015 static void AnimateEnvelopeRequest(int anim_mode, int action)
3016 {
3017   int graphic = IMG_BACKGROUND_REQUEST;
3018   boolean draw_masked = graphic_info[graphic].draw_masked;
3019   int delay_value_normal = request.step_delay;
3020   int delay_value_fast = delay_value_normal / 2;
3021   boolean ffwd_delay = (tape.playing && tape.fast_forward);
3022   boolean no_delay = (tape.warp_forward);
3023   int delay_value = (ffwd_delay ? delay_value_fast : delay_value_normal);
3024   int anim_delay_value = MAX(1, (no_delay ? 0 : delay_value + 500 * 0) / 2);
3025   unsigned int anim_delay = 0;
3026
3027   int tile_size = MAX(request.step_offset, 1);
3028   int max_xsize = request.width  / tile_size;
3029   int max_ysize = request.height / tile_size;
3030   int max_xsize_inner = max_xsize - 2;
3031   int max_ysize_inner = max_ysize - 2;
3032
3033   int xstart = (anim_mode & ANIM_VERTICAL ? max_xsize_inner : 0);
3034   int ystart = (anim_mode & ANIM_HORIZONTAL ? max_ysize_inner : 0);
3035   int xend = max_xsize_inner;
3036   int yend = (anim_mode != ANIM_DEFAULT ? max_ysize_inner : 0);
3037   int xstep = (xstart < xend ? 1 : 0);
3038   int ystep = (ystart < yend || xstep == 0 ? 1 : 0);
3039   int start = 0;
3040   int end = MAX(xend - xstart, yend - ystart);
3041   int i;
3042
3043   if (setup.quick_doors)
3044   {
3045     xstart = xend;
3046     ystart = yend;
3047     end = 0;
3048   }
3049
3050   for (i = start; i <= end; i++)
3051   {
3052     int last_frame = end;       // last frame of this "for" loop
3053     int x = xstart + i * xstep;
3054     int y = ystart + i * ystep;
3055     int xsize = (action == ACTION_CLOSING ? xend - (x - xstart) : x) + 2;
3056     int ysize = (action == ACTION_CLOSING ? yend - (y - ystart) : y) + 2;
3057     int xsize_size_left = (xsize - 1) * tile_size;
3058     int ysize_size_top  = (ysize - 1) * tile_size;
3059     int max_xsize_pos = (max_xsize - 1) * tile_size;
3060     int max_ysize_pos = (max_ysize - 1) * tile_size;
3061     int width  = xsize * tile_size;
3062     int height = ysize * tile_size;
3063     int src_x, src_y;
3064     int dst_x, dst_y;
3065     int xx, yy;
3066
3067     setRequestPosition(&src_x, &src_y, FALSE);
3068     setRequestPositionExt(&dst_x, &dst_y, width, height, FALSE);
3069
3070     BlitBitmap(bitmap_db_store_1, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
3071
3072     for (yy = 0; yy < 2; yy++)
3073     {
3074       for (xx = 0; xx < 2; xx++)
3075       {
3076         int src_xx = src_x + xx * max_xsize_pos;
3077         int src_yy = src_y + yy * max_ysize_pos;
3078         int dst_xx = dst_x + xx * xsize_size_left;
3079         int dst_yy = dst_y + yy * ysize_size_top;
3080         int xx_size = (xx ? tile_size : xsize_size_left);
3081         int yy_size = (yy ? tile_size : ysize_size_top);
3082
3083         if (draw_masked)
3084           BlitBitmapMasked(bitmap_db_store_2, backbuffer,
3085                            src_xx, src_yy, xx_size, yy_size, dst_xx, dst_yy);
3086         else
3087           BlitBitmap(bitmap_db_store_2, backbuffer,
3088                      src_xx, src_yy, xx_size, yy_size, dst_xx, dst_yy);
3089       }
3090     }
3091
3092     redraw_mask |= REDRAW_FIELD;
3093
3094     BackToFront();
3095
3096     SkipUntilDelayReached(&anim_delay, anim_delay_value, &i, last_frame);
3097   }
3098
3099   ClearAutoRepeatKeyEvents();
3100 }
3101
3102 static void ShowEnvelopeRequest(char *text, unsigned int req_state, int action)
3103 {
3104   int graphic = IMG_BACKGROUND_REQUEST;
3105   int sound_opening = SND_REQUEST_OPENING;
3106   int sound_closing = SND_REQUEST_CLOSING;
3107   int anim_mode_1 = request.anim_mode;                  // (higher priority)
3108   int anim_mode_2 = graphic_info[graphic].anim_mode;    // (lower priority)
3109   int anim_mode = (anim_mode_1 != ANIM_DEFAULT ? anim_mode_1 : anim_mode_2);
3110   int main_anim_mode = (anim_mode == ANIM_NONE ? ANIM_VERTICAL|ANIM_HORIZONTAL:
3111                         anim_mode == ANIM_DEFAULT ? ANIM_VERTICAL : anim_mode);
3112
3113   if (game_status == GAME_MODE_PLAYING)
3114     BlitScreenToBitmap(backbuffer);
3115
3116   SetDrawtoField(DRAW_TO_BACKBUFFER);
3117
3118   // SetDrawBackgroundMask(REDRAW_NONE);
3119
3120   if (action == ACTION_OPENING)
3121   {
3122     BlitBitmap(backbuffer, bitmap_db_store_1, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
3123
3124     if (req_state & REQ_ASK)
3125     {
3126       MapGadget(tool_gadget[TOOL_CTRL_ID_YES]);
3127       MapGadget(tool_gadget[TOOL_CTRL_ID_NO]);
3128     }
3129     else if (req_state & REQ_CONFIRM)
3130     {
3131       MapGadget(tool_gadget[TOOL_CTRL_ID_CONFIRM]);
3132     }
3133     else if (req_state & REQ_PLAYER)
3134     {
3135       MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_1]);
3136       MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_2]);
3137       MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_3]);
3138       MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_4]);
3139     }
3140
3141     DrawEnvelopeRequest(text);
3142   }
3143
3144   game.envelope_active = TRUE;  // needed for RedrawPlayfield() events
3145
3146   if (action == ACTION_OPENING)
3147   {
3148     PlayMenuSoundStereo(sound_opening, SOUND_MIDDLE);
3149
3150     if (anim_mode == ANIM_DEFAULT)
3151       AnimateEnvelopeRequest(ANIM_DEFAULT, ACTION_OPENING);
3152
3153     AnimateEnvelopeRequest(main_anim_mode, ACTION_OPENING);
3154   }
3155   else
3156   {
3157     PlayMenuSoundStereo(sound_closing, SOUND_MIDDLE);
3158
3159     if (anim_mode != ANIM_NONE)
3160       AnimateEnvelopeRequest(main_anim_mode, ACTION_CLOSING);
3161
3162     if (anim_mode == ANIM_DEFAULT)
3163       AnimateEnvelopeRequest(ANIM_DEFAULT, ACTION_CLOSING);
3164   }
3165
3166   game.envelope_active = FALSE;
3167
3168   if (action == ACTION_CLOSING)
3169     BlitBitmap(bitmap_db_store_1, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
3170
3171   // SetDrawBackgroundMask(last_draw_background_mask);
3172
3173   redraw_mask |= REDRAW_FIELD;
3174
3175   BackToFront();
3176
3177   if (action == ACTION_CLOSING &&
3178       game_status == GAME_MODE_PLAYING &&
3179       level.game_engine_type == GAME_ENGINE_TYPE_RND)
3180     SetDrawtoField(DRAW_TO_FIELDBUFFER);
3181 }
3182
3183 static void DrawPreviewElement(int dst_x, int dst_y, int element, int tilesize)
3184 {
3185   if (IS_MM_WALL(element))
3186   {
3187     DrawSizedWall_MM(dst_x, dst_y, element, tilesize, el2preimg);
3188   }
3189   else
3190   {
3191     Bitmap *src_bitmap;
3192     int src_x, src_y;
3193     int graphic = el2preimg(element);
3194
3195     getSizedGraphicSource(graphic, 0, tilesize, &src_bitmap, &src_x, &src_y);
3196     BlitBitmap(src_bitmap, drawto, src_x, src_y, tilesize, tilesize,
3197                dst_x, dst_y);
3198   }
3199 }
3200
3201 void DrawLevel(int draw_background_mask)
3202 {
3203   int x,y;
3204
3205   SetMainBackgroundImage(IMG_BACKGROUND_PLAYING);
3206   SetDrawBackgroundMask(draw_background_mask);
3207
3208   ClearField();
3209
3210   for (x = BX1; x <= BX2; x++)
3211     for (y = BY1; y <= BY2; y++)
3212       DrawScreenField(x, y);
3213
3214   redraw_mask |= REDRAW_FIELD;
3215 }
3216
3217 void DrawSizedLevel(int size_x, int size_y, int scroll_x, int scroll_y,
3218                     int tilesize)
3219 {
3220   int x,y;
3221
3222   for (x = 0; x < size_x; x++)
3223     for (y = 0; y < size_y; y++)
3224       DrawSizedElementOrWall(x, y, scroll_x, scroll_y, tilesize);
3225
3226   redraw_mask |= REDRAW_FIELD;
3227 }
3228
3229 void DrawMiniLevel(int size_x, int size_y, int scroll_x, int scroll_y)
3230 {
3231   int x,y;
3232
3233   for (x = 0; x < size_x; x++)
3234     for (y = 0; y < size_y; y++)
3235       DrawMiniElementOrWall(x, y, scroll_x, scroll_y);
3236
3237   redraw_mask |= REDRAW_FIELD;
3238 }
3239
3240 static void DrawPreviewLevelPlayfield(int from_x, int from_y)
3241 {
3242   boolean show_level_border = (BorderElement != EL_EMPTY);
3243   int level_xsize = lev_fieldx + (show_level_border ? 2 : 0);
3244   int level_ysize = lev_fieldy + (show_level_border ? 2 : 0);
3245   int tile_size = preview.tile_size;
3246   int preview_width  = preview.xsize * tile_size;
3247   int preview_height = preview.ysize * tile_size;
3248   int real_preview_xsize = MIN(level_xsize, preview.xsize);
3249   int real_preview_ysize = MIN(level_ysize, preview.ysize);
3250   int real_preview_width  = real_preview_xsize * tile_size;
3251   int real_preview_height = real_preview_ysize * tile_size;
3252   int dst_x = SX + ALIGNED_XPOS(preview.x, preview_width, preview.align);
3253   int dst_y = SY + ALIGNED_YPOS(preview.y, preview_height, preview.valign);
3254   int x, y;
3255
3256   if (!IN_GFX_FIELD_FULL(dst_x, dst_y + preview_height - 1))
3257     return;
3258
3259   DrawBackground(dst_x, dst_y, preview_width, preview_height);
3260
3261   dst_x += (preview_width  - real_preview_width)  / 2;
3262   dst_y += (preview_height - real_preview_height) / 2;
3263
3264   for (x = 0; x < real_preview_xsize; x++)
3265   {
3266     for (y = 0; y < real_preview_ysize; y++)
3267     {
3268       int lx = from_x + x + (show_level_border ? -1 : 0);
3269       int ly = from_y + y + (show_level_border ? -1 : 0);
3270       int element = (IN_LEV_FIELD(lx, ly) ? level.field[lx][ly] :
3271                      getBorderElement(lx, ly));
3272
3273       DrawPreviewElement(dst_x + x * tile_size, dst_y + y * tile_size,
3274                          element, tile_size);
3275     }
3276   }
3277
3278   redraw_mask |= REDRAW_FIELD;
3279 }
3280
3281 #define MICROLABEL_EMPTY                0
3282 #define MICROLABEL_LEVEL_NAME           1
3283 #define MICROLABEL_LEVEL_AUTHOR_HEAD    2
3284 #define MICROLABEL_LEVEL_AUTHOR         3
3285 #define MICROLABEL_IMPORTED_FROM_HEAD   4
3286 #define MICROLABEL_IMPORTED_FROM        5
3287 #define MICROLABEL_IMPORTED_BY_HEAD     6
3288 #define MICROLABEL_IMPORTED_BY          7
3289
3290 static int getMaxTextLength(struct TextPosInfo *pos, int font_nr)
3291 {
3292   int max_text_width = SXSIZE;
3293   int font_width = getFontWidth(font_nr);
3294
3295   if (pos->align == ALIGN_CENTER)
3296     max_text_width = (pos->x < SXSIZE / 2 ? pos->x * 2 : (SXSIZE - pos->x) * 2);
3297   else if (pos->align == ALIGN_RIGHT)
3298     max_text_width = pos->x;
3299   else
3300     max_text_width = SXSIZE - pos->x;
3301
3302   return max_text_width / font_width;
3303 }
3304
3305 static void DrawPreviewLevelLabelExt(int mode, struct TextPosInfo *pos)
3306 {
3307   char label_text[MAX_OUTPUT_LINESIZE + 1];
3308   int max_len_label_text;
3309   int font_nr = pos->font;
3310   int i;
3311
3312   if (!IN_GFX_FIELD_FULL(pos->x, pos->y + getFontHeight(pos->font)))
3313     return;
3314
3315   if (mode == MICROLABEL_LEVEL_AUTHOR_HEAD ||
3316       mode == MICROLABEL_IMPORTED_FROM_HEAD ||
3317       mode == MICROLABEL_IMPORTED_BY_HEAD)
3318     font_nr = pos->font_alt;
3319
3320   max_len_label_text = getMaxTextLength(pos, font_nr);
3321
3322   if (pos->size != -1)
3323     max_len_label_text = pos->size;
3324
3325   for (i = 0; i < max_len_label_text; i++)
3326     label_text[i] = ' ';
3327   label_text[max_len_label_text] = '\0';
3328
3329   if (strlen(label_text) > 0)
3330     DrawTextSAligned(pos->x, pos->y, label_text, font_nr, pos->align);
3331
3332   strncpy(label_text,
3333           (mode == MICROLABEL_LEVEL_NAME ? level.name :
3334            mode == MICROLABEL_LEVEL_AUTHOR_HEAD ? "created by" :
3335            mode == MICROLABEL_LEVEL_AUTHOR ? level.author :
3336            mode == MICROLABEL_IMPORTED_FROM_HEAD ? "imported from" :
3337            mode == MICROLABEL_IMPORTED_FROM ? leveldir_current->imported_from :
3338            mode == MICROLABEL_IMPORTED_BY_HEAD ? "imported by" :
3339            mode == MICROLABEL_IMPORTED_BY ? leveldir_current->imported_by :""),
3340           max_len_label_text);
3341   label_text[max_len_label_text] = '\0';
3342
3343   if (strlen(label_text) > 0)
3344     DrawTextSAligned(pos->x, pos->y, label_text, font_nr, pos->align);
3345
3346   redraw_mask |= REDRAW_FIELD;
3347 }
3348
3349 static void DrawPreviewLevelLabel(int mode)
3350 {
3351   DrawPreviewLevelLabelExt(mode, &menu.main.text.level_info_2);
3352 }
3353
3354 static void DrawPreviewLevelInfo(int mode)
3355 {
3356   if (mode == MICROLABEL_LEVEL_NAME)
3357     DrawPreviewLevelLabelExt(mode, &menu.main.text.level_name);
3358   else if (mode == MICROLABEL_LEVEL_AUTHOR)
3359     DrawPreviewLevelLabelExt(mode, &menu.main.text.level_author);
3360 }
3361
3362 static void DrawPreviewLevelExt(boolean restart)
3363 {
3364   static unsigned int scroll_delay = 0;
3365   static unsigned int label_delay = 0;
3366   static int from_x, from_y, scroll_direction;
3367   static int label_state, label_counter;
3368   unsigned int scroll_delay_value = preview.step_delay;
3369   boolean show_level_border = (BorderElement != EL_EMPTY);
3370   int level_xsize = lev_fieldx + (show_level_border ? 2 : 0);
3371   int level_ysize = lev_fieldy + (show_level_border ? 2 : 0);
3372
3373   if (restart)
3374   {
3375     from_x = 0;
3376     from_y = 0;
3377
3378     if (preview.anim_mode == ANIM_CENTERED)
3379     {
3380       if (level_xsize > preview.xsize)
3381         from_x = (level_xsize - preview.xsize) / 2;
3382       if (level_ysize > preview.ysize)
3383         from_y = (level_ysize - preview.ysize) / 2;
3384     }
3385
3386     from_x += preview.xoffset;
3387     from_y += preview.yoffset;
3388
3389     scroll_direction = MV_RIGHT;
3390     label_state = 1;
3391     label_counter = 0;
3392
3393     DrawPreviewLevelPlayfield(from_x, from_y);
3394     DrawPreviewLevelLabel(label_state);
3395
3396     DrawPreviewLevelInfo(MICROLABEL_LEVEL_NAME);
3397     DrawPreviewLevelInfo(MICROLABEL_LEVEL_AUTHOR);
3398
3399     // initialize delay counters
3400     DelayReached(&scroll_delay, 0);
3401     DelayReached(&label_delay, 0);
3402
3403     if (leveldir_current->name)
3404     {
3405       struct TextPosInfo *pos = &menu.main.text.level_info_1;
3406       char label_text[MAX_OUTPUT_LINESIZE + 1];
3407       int font_nr = pos->font;
3408       int max_len_label_text = getMaxTextLength(pos, font_nr);
3409
3410       if (pos->size != -1)
3411         max_len_label_text = pos->size;
3412
3413       strncpy(label_text, leveldir_current->name, max_len_label_text);
3414       label_text[max_len_label_text] = '\0';
3415
3416       if (IN_GFX_FIELD_FULL(pos->x, pos->y + getFontHeight(pos->font)))
3417         DrawTextSAligned(pos->x, pos->y, label_text, font_nr, pos->align);
3418     }
3419
3420     return;
3421   }
3422
3423   // scroll preview level, if needed
3424   if (preview.anim_mode != ANIM_NONE &&
3425       (level_xsize > preview.xsize || level_ysize > preview.ysize) &&
3426       DelayReached(&scroll_delay, scroll_delay_value))
3427   {
3428     switch (scroll_direction)
3429     {
3430       case MV_LEFT:
3431         if (from_x > 0)
3432         {
3433           from_x -= preview.step_offset;
3434           from_x = (from_x < 0 ? 0 : from_x);
3435         }
3436         else
3437           scroll_direction = MV_UP;
3438         break;
3439
3440       case MV_RIGHT:
3441         if (from_x < level_xsize - preview.xsize)
3442         {
3443           from_x += preview.step_offset;
3444           from_x = (from_x > level_xsize - preview.xsize ?
3445                     level_xsize - preview.xsize : from_x);
3446         }
3447         else
3448           scroll_direction = MV_DOWN;
3449         break;
3450
3451       case MV_UP:
3452         if (from_y > 0)
3453         {
3454           from_y -= preview.step_offset;
3455           from_y = (from_y < 0 ? 0 : from_y);
3456         }
3457         else
3458           scroll_direction = MV_RIGHT;
3459         break;
3460
3461       case MV_DOWN:
3462         if (from_y < level_ysize - preview.ysize)
3463         {
3464           from_y += preview.step_offset;
3465           from_y = (from_y > level_ysize - preview.ysize ?
3466                     level_ysize - preview.ysize : from_y);
3467         }
3468         else
3469           scroll_direction = MV_LEFT;
3470         break;
3471
3472       default:
3473         break;
3474     }
3475
3476     DrawPreviewLevelPlayfield(from_x, from_y);
3477   }
3478
3479   // !!! THIS ALL SUCKS -- SHOULD BE CLEANLY REWRITTEN !!!
3480   // redraw micro level label, if needed
3481   if (!strEqual(level.name, NAMELESS_LEVEL_NAME) &&
3482       !strEqual(level.author, ANONYMOUS_NAME) &&
3483       !strEqual(level.author, leveldir_current->name) &&
3484       DelayReached(&label_delay, MICROLEVEL_LABEL_DELAY))
3485   {
3486     int max_label_counter = 23;
3487
3488     if (leveldir_current->imported_from != NULL &&
3489         strlen(leveldir_current->imported_from) > 0)
3490       max_label_counter += 14;
3491     if (leveldir_current->imported_by != NULL &&
3492         strlen(leveldir_current->imported_by) > 0)
3493       max_label_counter += 14;
3494
3495     label_counter = (label_counter + 1) % max_label_counter;
3496     label_state = (label_counter >= 0 && label_counter <= 7 ?
3497                    MICROLABEL_LEVEL_NAME :
3498                    label_counter >= 9 && label_counter <= 12 ?
3499                    MICROLABEL_LEVEL_AUTHOR_HEAD :
3500                    label_counter >= 14 && label_counter <= 21 ?
3501                    MICROLABEL_LEVEL_AUTHOR :
3502                    label_counter >= 23 && label_counter <= 26 ?
3503                    MICROLABEL_IMPORTED_FROM_HEAD :
3504                    label_counter >= 28 && label_counter <= 35 ?
3505                    MICROLABEL_IMPORTED_FROM :
3506                    label_counter >= 37 && label_counter <= 40 ?
3507                    MICROLABEL_IMPORTED_BY_HEAD :
3508                    label_counter >= 42 && label_counter <= 49 ?
3509                    MICROLABEL_IMPORTED_BY : MICROLABEL_EMPTY);
3510
3511     if (leveldir_current->imported_from == NULL &&
3512         (label_state == MICROLABEL_IMPORTED_FROM_HEAD ||
3513          label_state == MICROLABEL_IMPORTED_FROM))
3514       label_state = (label_state == MICROLABEL_IMPORTED_FROM_HEAD ?
3515                      MICROLABEL_IMPORTED_BY_HEAD : MICROLABEL_IMPORTED_BY);
3516
3517     DrawPreviewLevelLabel(label_state);
3518   }
3519 }
3520
3521 void DrawPreviewPlayers(void)
3522 {
3523   if (game_status != GAME_MODE_MAIN)
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   int num_players = 0;
3632   int i;
3633
3634   for (i = 0; i < MAX_PLAYERS; i++)
3635     if (stored_player[i].connected_network)
3636       num_players++;
3637
3638   struct TextPosInfo *pos = &menu.main.network_players;
3639   int tile_size = pos->tile_size;
3640   int border_size = pos->border_size;
3641   int xoffset_text = tile_size + border_size;
3642   int font_nr = pos->font;
3643   int font_width = getFontWidth(font_nr);
3644   int font_height = getFontHeight(font_nr);
3645   int player_height = MAX(tile_size, font_height);
3646   int player_yoffset = player_height + border_size;
3647   int max_players_width = xoffset_text + MAX_PLAYER_NAME_LEN * font_width;
3648   int max_players_height = MAX_PLAYERS * player_yoffset - border_size;
3649   int all_players_height = num_players * player_yoffset - border_size;
3650   int max_xpos = SX + ALIGNED_XPOS(pos->x, max_players_width,  pos->align);
3651   int max_ypos = SY + ALIGNED_YPOS(pos->y, max_players_height, pos->valign);
3652   int ypos = SY + ALIGNED_YPOS(pos->y, all_players_height, pos->valign);
3653
3654   ClearRectangleOnBackground(drawto, max_xpos, max_ypos,
3655                              max_players_width, max_players_height);
3656
3657   // first draw local network player ...
3658   for (i = 0; i < MAX_PLAYERS; i++)
3659   {
3660     if (stored_player[i].connected_network &&
3661         stored_player[i].connected_locally)
3662     {
3663       char *player_name = getNetworkPlayerName(i + 1);
3664       int player_width = xoffset_text + getTextWidth(player_name, font_nr);
3665       int xpos = SX + ALIGNED_XPOS(pos->x, player_width,  pos->align);
3666
3667       DrawNetworkPlayer(xpos, ypos, i, tile_size, border_size, font_nr);
3668
3669       ypos += player_yoffset;
3670     }
3671   }
3672
3673   // ... then draw all other network players
3674   for (i = 0; i < MAX_PLAYERS; i++)
3675   {
3676     if (stored_player[i].connected_network &&
3677         !stored_player[i].connected_locally)
3678     {
3679       char *player_name = getNetworkPlayerName(i + 1);
3680       int player_width = xoffset_text + getTextWidth(player_name, font_nr);
3681       int xpos = SX + ALIGNED_XPOS(pos->x, player_width,  pos->align);
3682
3683       DrawNetworkPlayer(xpos, ypos, i, tile_size, border_size, font_nr);
3684
3685       ypos += player_yoffset;
3686     }
3687   }
3688 }
3689
3690 void DrawNetworkPlayers(void)
3691 {
3692   DrawNetworkPlayersExt(FALSE);
3693 }
3694
3695 void ClearNetworkPlayers(void)
3696 {
3697   DrawNetworkPlayersExt(TRUE);
3698 }
3699
3700 static void DrawGraphicAnimationExt(DrawBuffer *dst_bitmap, int x, int y,
3701                                     int graphic, int sync_frame,
3702                                     int mask_mode)
3703 {
3704   int frame = getGraphicAnimationFrame(graphic, sync_frame);
3705
3706   if (mask_mode == USE_MASKING)
3707     DrawGraphicThruMaskExt(dst_bitmap, x, y, graphic, frame);
3708   else
3709     DrawGraphicExt(dst_bitmap, x, y, graphic, frame);
3710 }
3711
3712 void DrawFixedGraphicAnimationExt(DrawBuffer *dst_bitmap, int x, int y,
3713                                   int graphic, int sync_frame, int mask_mode)
3714 {
3715   int frame = getGraphicAnimationFrame(graphic, sync_frame);
3716
3717   if (mask_mode == USE_MASKING)
3718     DrawFixedGraphicThruMaskExt(dst_bitmap, x, y, graphic, frame);
3719   else
3720     DrawFixedGraphicExt(dst_bitmap, x, y, graphic, frame);
3721 }
3722
3723 static void DrawGraphicAnimation(int x, int y, int graphic)
3724 {
3725   int lx = LEVELX(x), ly = LEVELY(y);
3726
3727   if (!IN_SCR_FIELD(x, y))
3728     return;
3729
3730   DrawGraphicAnimationExt(drawto_field, FX + x * TILEX_VAR, FY + y * TILEY_VAR,
3731                           graphic, GfxFrame[lx][ly], NO_MASKING);
3732
3733   MarkTileDirty(x, y);
3734 }
3735
3736 void DrawFixedGraphicAnimation(int x, int y, int graphic)
3737 {
3738   int lx = LEVELX(x), ly = LEVELY(y);
3739
3740   if (!IN_SCR_FIELD(x, y))
3741     return;
3742
3743   DrawGraphicAnimationExt(drawto_field, FX + x * TILEX, FY + y * TILEY,
3744                           graphic, GfxFrame[lx][ly], NO_MASKING);
3745   MarkTileDirty(x, y);
3746 }
3747
3748 void DrawLevelGraphicAnimation(int x, int y, int graphic)
3749 {
3750   DrawGraphicAnimation(SCREENX(x), SCREENY(y), graphic);
3751 }
3752
3753 void DrawLevelElementAnimation(int x, int y, int element)
3754 {
3755   int graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
3756
3757   DrawGraphicAnimation(SCREENX(x), SCREENY(y), graphic);
3758 }
3759
3760 void DrawLevelGraphicAnimationIfNeeded(int x, int y, int graphic)
3761 {
3762   int sx = SCREENX(x), sy = SCREENY(y);
3763
3764   if (!IN_LEV_FIELD(x, y) || !IN_SCR_FIELD(sx, sy))
3765     return;
3766
3767   if (!IS_NEW_FRAME(GfxFrame[x][y], graphic))
3768     return;
3769
3770   DrawGraphicAnimation(sx, sy, graphic);
3771
3772 #if 1
3773   if (GFX_CRUMBLED(TILE_GFX_ELEMENT(x, y)))
3774     DrawLevelFieldCrumbled(x, y);
3775 #else
3776   if (GFX_CRUMBLED(Feld[x][y]))
3777     DrawLevelFieldCrumbled(x, y);
3778 #endif
3779 }
3780
3781 void DrawLevelElementAnimationIfNeeded(int x, int y, int element)
3782 {
3783   int sx = SCREENX(x), sy = SCREENY(y);
3784   int graphic;
3785
3786   if (!IN_LEV_FIELD(x, y) || !IN_SCR_FIELD(sx, sy))
3787     return;
3788
3789   graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
3790
3791   if (!IS_NEW_FRAME(GfxFrame[x][y], graphic))
3792     return;
3793
3794   DrawGraphicAnimation(sx, sy, graphic);
3795
3796   if (GFX_CRUMBLED(element))
3797     DrawLevelFieldCrumbled(x, y);
3798 }
3799
3800 static int getPlayerGraphic(struct PlayerInfo *player, int move_dir)
3801 {
3802   if (player->use_murphy)
3803   {
3804     // this works only because currently only one player can be "murphy" ...
3805     static int last_horizontal_dir = MV_LEFT;
3806     int graphic = el_act_dir2img(EL_SP_MURPHY, player->GfxAction, move_dir);
3807
3808     if (move_dir == MV_LEFT || move_dir == MV_RIGHT)
3809       last_horizontal_dir = move_dir;
3810
3811     if (graphic == IMG_SP_MURPHY)       // undefined => use special graphic
3812     {
3813       int direction = (player->is_snapping ? move_dir : last_horizontal_dir);
3814
3815       graphic = el_act_dir2img(EL_SP_MURPHY, player->GfxAction, direction);
3816     }
3817
3818     return graphic;
3819   }
3820   else
3821     return el_act_dir2img(player->artwork_element, player->GfxAction,move_dir);
3822 }
3823
3824 static boolean equalGraphics(int graphic1, int graphic2)
3825 {
3826   struct GraphicInfo *g1 = &graphic_info[graphic1];
3827   struct GraphicInfo *g2 = &graphic_info[graphic2];
3828
3829   return (g1->bitmap      == g2->bitmap &&
3830           g1->src_x       == g2->src_x &&
3831           g1->src_y       == g2->src_y &&
3832           g1->anim_frames == g2->anim_frames &&
3833           g1->anim_delay  == g2->anim_delay &&
3834           g1->anim_mode   == g2->anim_mode);
3835 }
3836
3837 #define DRAW_PLAYER_OVER_PUSHED_ELEMENT 1
3838
3839 enum
3840 {
3841   DRAW_PLAYER_STAGE_INIT = 0,
3842   DRAW_PLAYER_STAGE_LAST_FIELD,
3843   DRAW_PLAYER_STAGE_FIELD_UNDER_PLAYER,
3844 #if DRAW_PLAYER_OVER_PUSHED_ELEMENT
3845   DRAW_PLAYER_STAGE_ELEMENT_PUSHED,
3846   DRAW_PLAYER_STAGE_PLAYER,
3847 #else
3848   DRAW_PLAYER_STAGE_PLAYER,
3849   DRAW_PLAYER_STAGE_ELEMENT_PUSHED,
3850 #endif
3851   DRAW_PLAYER_STAGE_ELEMENT_OVER_PLAYER,
3852   DRAW_PLAYER_STAGE_FIELD_OVER_PLAYER,
3853
3854   NUM_DRAW_PLAYER_STAGES
3855 };
3856
3857 static void DrawPlayerExt(struct PlayerInfo *player, int drawing_stage)
3858 {
3859   static int static_last_player_graphic[MAX_PLAYERS];
3860   static int static_last_player_frame[MAX_PLAYERS];
3861   static boolean static_player_is_opaque[MAX_PLAYERS];
3862   static boolean draw_player[MAX_PLAYERS];
3863   int pnr = player->index_nr;
3864
3865   if (drawing_stage == DRAW_PLAYER_STAGE_INIT)
3866   {
3867     static_last_player_graphic[pnr] = getPlayerGraphic(player, player->MovDir);
3868     static_last_player_frame[pnr] = player->Frame;
3869     static_player_is_opaque[pnr] = FALSE;
3870
3871     draw_player[pnr] = TRUE;
3872   }
3873
3874   if (!draw_player[pnr])
3875     return;
3876
3877 #if DEBUG
3878   if (!IN_LEV_FIELD(player->jx, player->jy))
3879   {
3880     printf("DrawPlayerField(): x = %d, y = %d\n", player->jx, player->jy);
3881     printf("DrawPlayerField(): This should never happen!\n");
3882
3883     draw_player[pnr] = FALSE;
3884
3885     return;
3886   }
3887 #endif
3888
3889   int last_player_graphic  = static_last_player_graphic[pnr];
3890   int last_player_frame    = static_last_player_frame[pnr];
3891   boolean player_is_opaque = static_player_is_opaque[pnr];
3892
3893   int jx = player->jx;
3894   int jy = player->jy;
3895   int move_dir = (player->is_waiting ? player->dir_waiting : player->MovDir);
3896   int dx = (move_dir == MV_LEFT ? -1 : move_dir == MV_RIGHT ? +1 : 0);
3897   int dy = (move_dir == MV_UP   ? -1 : move_dir == MV_DOWN  ? +1 : 0);
3898   int last_jx = (player->is_moving ? jx - dx : jx);
3899   int last_jy = (player->is_moving ? jy - dy : jy);
3900   int next_jx = jx + dx;
3901   int next_jy = jy + dy;
3902   boolean player_is_moving = (player->MovPos != 0 ? TRUE : FALSE);
3903   int sx = SCREENX(jx);
3904   int sy = SCREENY(jy);
3905   int sxx = (move_dir == MV_LEFT || move_dir == MV_RIGHT ? player->GfxPos : 0);
3906   int syy = (move_dir == MV_UP   || move_dir == MV_DOWN  ? player->GfxPos : 0);
3907   int element = Feld[jx][jy];
3908   int last_element = Feld[last_jx][last_jy];
3909   int action = (player->is_pushing    ? ACTION_PUSHING         :
3910                 player->is_digging    ? ACTION_DIGGING         :
3911                 player->is_collecting ? ACTION_COLLECTING      :
3912                 player->is_moving     ? ACTION_MOVING          :
3913                 player->is_snapping   ? ACTION_SNAPPING        :
3914                 player->is_dropping   ? ACTION_DROPPING        :
3915                 player->is_waiting    ? player->action_waiting :
3916                 ACTION_DEFAULT);
3917
3918   if (drawing_stage == DRAW_PLAYER_STAGE_INIT)
3919   {
3920     // ------------------------------------------------------------------------
3921     // initialize drawing the player
3922     // ------------------------------------------------------------------------
3923
3924     draw_player[pnr] = FALSE;
3925
3926     // GfxElement[][] is set to the element the player is digging or collecting;
3927     // remove also for off-screen player if the player is not moving anymore
3928     if (IN_LEV_FIELD(jx, jy) && !player_is_moving)
3929       GfxElement[jx][jy] = EL_UNDEFINED;
3930
3931     if (!player->active || !IN_SCR_FIELD(SCREENX(last_jx), SCREENY(last_jy)))
3932       return;
3933
3934     if (element == EL_EXPLOSION)
3935       return;
3936
3937     InitPlayerGfxAnimation(player, action, move_dir);
3938
3939     draw_player[pnr] = TRUE;
3940   }
3941   else if (drawing_stage == DRAW_PLAYER_STAGE_LAST_FIELD)
3942   {
3943     // ------------------------------------------------------------------------
3944     // draw things in the field the player is leaving, if needed
3945     // ------------------------------------------------------------------------
3946
3947     if (!IN_SCR_FIELD(sx, sy))
3948       draw_player[pnr] = FALSE;
3949
3950     if (!player->is_moving)
3951       return;
3952
3953     if (Back[last_jx][last_jy] && IS_DRAWABLE(last_element))
3954     {
3955       DrawLevelElement(last_jx, last_jy, Back[last_jx][last_jy]);
3956
3957       if (last_element == EL_DYNAMITE_ACTIVE ||
3958           last_element == EL_EM_DYNAMITE_ACTIVE ||
3959           last_element == EL_SP_DISK_RED_ACTIVE)
3960         DrawDynamite(last_jx, last_jy);
3961       else
3962         DrawLevelFieldThruMask(last_jx, last_jy);
3963     }
3964     else if (last_element == EL_DYNAMITE_ACTIVE ||
3965              last_element == EL_EM_DYNAMITE_ACTIVE ||
3966              last_element == EL_SP_DISK_RED_ACTIVE)
3967       DrawDynamite(last_jx, last_jy);
3968     else
3969       DrawLevelField(last_jx, last_jy);
3970
3971     if (player->is_pushing && IN_SCR_FIELD(SCREENX(next_jx), SCREENY(next_jy)))
3972       DrawLevelElement(next_jx, next_jy, EL_EMPTY);
3973   }
3974   else if (drawing_stage == DRAW_PLAYER_STAGE_FIELD_UNDER_PLAYER)
3975   {
3976     // ------------------------------------------------------------------------
3977     // draw things behind the player, if needed
3978     // ------------------------------------------------------------------------
3979
3980     if (Back[jx][jy])
3981     {
3982       DrawLevelElement(jx, jy, Back[jx][jy]);
3983
3984       return;
3985     }
3986
3987     if (IS_ACTIVE_BOMB(element))
3988     {
3989       DrawLevelElement(jx, jy, EL_EMPTY);
3990
3991       return;
3992     }
3993
3994     if (player_is_moving && GfxElement[jx][jy] != EL_UNDEFINED)
3995     {
3996       int old_element = GfxElement[jx][jy];
3997       int old_graphic = el_act_dir2img(old_element, action, move_dir);
3998       int frame = getGraphicAnimationFrame(old_graphic, player->StepFrame);
3999
4000       if (GFX_CRUMBLED(old_element))
4001         DrawLevelFieldCrumbledDigging(jx, jy, move_dir, player->StepFrame);
4002       else
4003         DrawGraphic(sx, sy, old_graphic, frame);
4004
4005       if (graphic_info[old_graphic].anim_mode & ANIM_OPAQUE_PLAYER)
4006         static_player_is_opaque[pnr] = TRUE;
4007     }
4008     else
4009     {
4010       GfxElement[jx][jy] = EL_UNDEFINED;
4011
4012       // make sure that pushed elements are drawn with correct frame rate
4013       int graphic = el_act_dir2img(element, ACTION_PUSHING, move_dir);
4014
4015       if (player->is_pushing && player->is_moving && !IS_ANIM_MODE_CE(graphic))
4016         GfxFrame[jx][jy] = player->StepFrame;
4017
4018       DrawLevelField(jx, jy);
4019     }
4020   }
4021   else if (drawing_stage == DRAW_PLAYER_STAGE_ELEMENT_PUSHED)
4022   {
4023     // ------------------------------------------------------------------------
4024     // draw things the player is pushing, if needed
4025     // ------------------------------------------------------------------------
4026
4027     if (!player->is_pushing || !player->is_moving)
4028       return;
4029
4030     int gfx_frame = GfxFrame[jx][jy];
4031
4032     if (!IS_MOVING(jx, jy))             // push movement already finished
4033     {
4034       element = Feld[next_jx][next_jy];
4035       gfx_frame = GfxFrame[next_jx][next_jy];
4036     }
4037
4038     int graphic = el_act_dir2img(element, ACTION_PUSHING, move_dir);
4039     int sync_frame = (IS_ANIM_MODE_CE(graphic) ? gfx_frame : player->StepFrame);
4040     int frame = getGraphicAnimationFrame(graphic, sync_frame);
4041
4042     // draw background element under pushed element (like the Sokoban field)
4043     if (game.use_masked_pushing && IS_MOVING(jx, jy))
4044     {
4045       // this allows transparent pushing animation over non-black background
4046
4047       if (Back[jx][jy])
4048         DrawLevelElement(jx, jy, Back[jx][jy]);
4049       else
4050         DrawLevelElement(jx, jy, EL_EMPTY);
4051
4052       if (Back[next_jx][next_jy])
4053         DrawLevelElement(next_jx, next_jy, Back[next_jx][next_jy]);
4054       else
4055         DrawLevelElement(next_jx, next_jy, EL_EMPTY);
4056     }
4057     else if (Back[next_jx][next_jy])
4058       DrawLevelElement(next_jx, next_jy, Back[next_jx][next_jy]);
4059
4060     int px = SCREENX(jx), py = SCREENY(jy);
4061     int pxx = (TILEX - ABS(sxx)) * dx;
4062     int pyy = (TILEY - ABS(syy)) * dy;
4063
4064 #if 1
4065     // do not draw (EM style) pushing animation when pushing is finished
4066     // (two-tile animations usually do not contain start and end frame)
4067     if (graphic_info[graphic].double_movement && !IS_MOVING(jx, jy))
4068       DrawLevelElement(next_jx, next_jy, Feld[next_jx][next_jy]);
4069     else
4070       DrawGraphicShiftedThruMask(px, py, pxx, pyy, graphic, frame, NO_CUTTING);
4071 #else
4072     // masked drawing is needed for EMC style (double) movement graphics
4073     // !!! (ONLY WHEN DRAWING PUSHED ELEMENT OVER THE PLAYER) !!!
4074     DrawGraphicShiftedThruMask(px, py, pxx, pyy, graphic, frame, NO_CUTTING);
4075 #endif
4076   }
4077   else if (drawing_stage == DRAW_PLAYER_STAGE_PLAYER)
4078   {
4079     // ------------------------------------------------------------------------
4080     // draw player himself
4081     // ------------------------------------------------------------------------
4082
4083     int graphic = getPlayerGraphic(player, move_dir);
4084
4085     // in the case of changed player action or direction, prevent the current
4086     // animation frame from being restarted for identical animations
4087     if (player->Frame == 0 && equalGraphics(graphic, last_player_graphic))
4088       player->Frame = last_player_frame;
4089
4090     int frame = getGraphicAnimationFrame(graphic, player->Frame);
4091
4092     if (player_is_opaque)
4093       DrawGraphicShifted(sx,sy, sxx,syy, graphic, frame, NO_CUTTING,NO_MASKING);
4094     else
4095       DrawGraphicShiftedThruMask(sx, sy, sxx, syy, graphic, frame, NO_CUTTING);
4096
4097     if (SHIELD_ON(player))
4098     {
4099       graphic = (player->shield_deadly_time_left ? IMG_SHIELD_DEADLY_ACTIVE :
4100                  IMG_SHIELD_NORMAL_ACTIVE);
4101       frame = getGraphicAnimationFrame(graphic, -1);
4102
4103       DrawGraphicShiftedThruMask(sx, sy, sxx, syy, graphic, frame, NO_CUTTING);
4104     }
4105   }
4106   else if (drawing_stage == DRAW_PLAYER_STAGE_ELEMENT_OVER_PLAYER)
4107   {
4108     // ------------------------------------------------------------------------
4109     // draw things in front of player (active dynamite or dynabombs)
4110     // ------------------------------------------------------------------------
4111
4112     if (IS_ACTIVE_BOMB(element))
4113     {
4114       int graphic = el2img(element);
4115       int frame = getGraphicAnimationFrame(graphic, GfxFrame[jx][jy]);
4116
4117       if (game.emulation == EMU_SUPAPLEX)
4118         DrawGraphic(sx, sy, IMG_SP_DISK_RED, frame);
4119       else
4120         DrawGraphicThruMask(sx, sy, graphic, frame);
4121     }
4122
4123     if (player_is_moving && last_element == EL_EXPLOSION)
4124     {
4125       int element = (GfxElement[last_jx][last_jy] != EL_UNDEFINED ?
4126                      GfxElement[last_jx][last_jy] :  EL_EMPTY);
4127       int graphic = el_act2img(element, ACTION_EXPLODING);
4128       int delay = (game.emulation == EMU_SUPAPLEX ? 3 : 2);
4129       int phase = ExplodePhase[last_jx][last_jy] - 1;
4130       int frame = getGraphicAnimationFrame(graphic, phase - delay);
4131
4132       if (phase >= delay)
4133         DrawGraphicThruMask(SCREENX(last_jx), SCREENY(last_jy), graphic, frame);
4134     }
4135   }
4136   else if (drawing_stage == DRAW_PLAYER_STAGE_FIELD_OVER_PLAYER)
4137   {
4138     // ------------------------------------------------------------------------
4139     // draw elements the player is just walking/passing through/under
4140     // ------------------------------------------------------------------------
4141
4142     if (player_is_moving)
4143     {
4144       // handle the field the player is leaving ...
4145       if (IS_ACCESSIBLE_INSIDE(last_element))
4146         DrawLevelField(last_jx, last_jy);
4147       else if (IS_ACCESSIBLE_UNDER(last_element))
4148         DrawLevelFieldThruMask(last_jx, last_jy);
4149     }
4150
4151     // do not redraw accessible elements if the player is just pushing them
4152     if (!player_is_moving || !player->is_pushing)
4153     {
4154       // ... and the field the player is entering
4155       if (IS_ACCESSIBLE_INSIDE(element))
4156         DrawLevelField(jx, jy);
4157       else if (IS_ACCESSIBLE_UNDER(element))
4158         DrawLevelFieldThruMask(jx, jy);
4159     }
4160
4161     MarkTileDirty(sx, sy);
4162   }
4163 }
4164
4165 void DrawPlayer(struct PlayerInfo *player)
4166 {
4167   int i;
4168
4169   for (i = 0; i < NUM_DRAW_PLAYER_STAGES; i++)
4170     DrawPlayerExt(player, i);
4171 }
4172
4173 void DrawAllPlayers(void)
4174 {
4175   int i, j;
4176
4177   for (i = 0; i < NUM_DRAW_PLAYER_STAGES; i++)
4178     for (j = 0; j < MAX_PLAYERS; j++)
4179       if (stored_player[j].active)
4180         DrawPlayerExt(&stored_player[j], i);
4181 }
4182
4183 void DrawPlayerField(int x, int y)
4184 {
4185   if (!IS_PLAYER(x, y))
4186     return;
4187
4188   DrawPlayer(PLAYERINFO(x, y));
4189 }
4190
4191 // ----------------------------------------------------------------------------
4192
4193 void WaitForEventToContinue(void)
4194 {
4195   boolean still_wait = TRUE;
4196
4197   if (program.headless)
4198     return;
4199
4200   // simulate releasing mouse button over last gadget, if still pressed
4201   if (button_status)
4202     HandleGadgets(-1, -1, 0);
4203
4204   button_status = MB_RELEASED;
4205
4206   ClearEventQueue();
4207
4208   while (still_wait)
4209   {
4210     Event event;
4211
4212     if (NextValidEvent(&event))
4213     {
4214       switch (event.type)
4215       {
4216         case EVENT_BUTTONRELEASE:
4217         case EVENT_KEYPRESS:
4218         case SDL_CONTROLLERBUTTONDOWN:
4219         case SDL_JOYBUTTONDOWN:
4220           still_wait = FALSE;
4221           break;
4222
4223         case EVENT_KEYRELEASE:
4224           ClearPlayerAction();
4225           break;
4226
4227         default:
4228           HandleOtherEvents(&event);
4229           break;
4230       }
4231     }
4232     else if (AnyJoystickButton() == JOY_BUTTON_NEW_PRESSED)
4233     {
4234       still_wait = FALSE;
4235     }
4236
4237     BackToFront();
4238   }
4239 }
4240
4241 #define MAX_REQUEST_LINES               13
4242 #define MAX_REQUEST_LINE_FONT1_LEN      7
4243 #define MAX_REQUEST_LINE_FONT2_LEN      10
4244
4245 static int RequestHandleEvents(unsigned int req_state)
4246 {
4247   boolean game_just_ended = (game_status == GAME_MODE_PLAYING &&
4248                              checkGameEnded());
4249   int width  = request.width;
4250   int height = request.height;
4251   int sx, sy;
4252   int result;
4253
4254   // when showing request dialog after game ended, deactivate game panel
4255   if (game_just_ended)
4256     game.panel.active = FALSE;
4257
4258   game.request_active = TRUE;
4259
4260   setRequestPosition(&sx, &sy, FALSE);
4261
4262   button_status = MB_RELEASED;
4263
4264   request_gadget_id = -1;
4265   result = -1;
4266
4267   while (result < 0)
4268   {
4269     if (game_just_ended)
4270     {
4271       // the MM game engine does not use a special (scrollable) field buffer
4272       if (level.game_engine_type != GAME_ENGINE_TYPE_MM)
4273         SetDrawtoField(DRAW_TO_FIELDBUFFER);
4274
4275       HandleGameActions();
4276
4277       SetDrawtoField(DRAW_TO_BACKBUFFER);
4278
4279       if (global.use_envelope_request)
4280       {
4281         // copy current state of request area to middle of playfield area
4282         BlitBitmap(bitmap_db_store_2, drawto, sx, sy, width, height, sx, sy);
4283       }
4284     }
4285
4286     if (PendingEvent())
4287     {
4288       Event event;
4289
4290       while (NextValidEvent(&event))
4291       {
4292         switch (event.type)
4293         {
4294           case EVENT_BUTTONPRESS:
4295           case EVENT_BUTTONRELEASE:
4296           case EVENT_MOTIONNOTIFY:
4297           {
4298             int mx, my;
4299
4300             if (event.type == EVENT_MOTIONNOTIFY)
4301             {
4302               if (!button_status)
4303                 continue;
4304
4305               motion_status = TRUE;
4306               mx = ((MotionEvent *) &event)->x;
4307               my = ((MotionEvent *) &event)->y;
4308             }
4309             else
4310             {
4311               motion_status = FALSE;
4312               mx = ((ButtonEvent *) &event)->x;
4313               my = ((ButtonEvent *) &event)->y;
4314               if (event.type == EVENT_BUTTONPRESS)
4315                 button_status = ((ButtonEvent *) &event)->button;
4316               else
4317                 button_status = MB_RELEASED;
4318             }
4319
4320             // this sets 'request_gadget_id'
4321             HandleGadgets(mx, my, button_status);
4322
4323             switch (request_gadget_id)
4324             {
4325               case TOOL_CTRL_ID_YES:
4326                 result = TRUE;
4327                 break;
4328               case TOOL_CTRL_ID_NO:
4329                 result = FALSE;
4330                 break;
4331               case TOOL_CTRL_ID_CONFIRM:
4332                 result = TRUE | FALSE;
4333                 break;
4334
4335               case TOOL_CTRL_ID_PLAYER_1:
4336                 result = 1;
4337                 break;
4338               case TOOL_CTRL_ID_PLAYER_2:
4339                 result = 2;
4340                 break;
4341               case TOOL_CTRL_ID_PLAYER_3:
4342                 result = 3;
4343                 break;
4344               case TOOL_CTRL_ID_PLAYER_4:
4345                 result = 4;
4346                 break;
4347
4348               default:
4349                 break;
4350             }
4351
4352             break;
4353           }
4354
4355           case SDL_WINDOWEVENT:
4356             HandleWindowEvent((WindowEvent *) &event);
4357             break;
4358
4359           case SDL_APP_WILLENTERBACKGROUND:
4360           case SDL_APP_DIDENTERBACKGROUND:
4361           case SDL_APP_WILLENTERFOREGROUND:
4362           case SDL_APP_DIDENTERFOREGROUND:
4363             HandlePauseResumeEvent((PauseResumeEvent *) &event);
4364             break;
4365
4366           case EVENT_KEYPRESS:
4367           {
4368             Key key = GetEventKey((KeyEvent *)&event, TRUE);
4369
4370             switch (key)
4371             {
4372               case KSYM_space:
4373                 if (req_state & REQ_CONFIRM)
4374                   result = 1;
4375                 break;
4376
4377               case KSYM_Return:
4378               case KSYM_y:
4379               case KSYM_Y:
4380               case KSYM_Select:
4381               case KSYM_Menu:
4382 #if defined(KSYM_Rewind)
4383               case KSYM_Rewind:         // for Amazon Fire TV remote
4384 #endif
4385                 result = 1;
4386                 break;
4387
4388               case KSYM_Escape:
4389               case KSYM_n:
4390               case KSYM_N:
4391               case KSYM_Back:
4392 #if defined(KSYM_FastForward)
4393               case KSYM_FastForward:    // for Amazon Fire TV remote
4394 #endif
4395                 result = 0;
4396                 break;
4397
4398               default:
4399                 HandleKeysDebug(key, KEY_PRESSED);
4400                 break;
4401             }
4402
4403             if (req_state & REQ_PLAYER)
4404             {
4405               int old_player_nr = setup.network_player_nr;
4406
4407               if (result != -1)
4408                 result = old_player_nr + 1;
4409
4410               switch (key)
4411               {
4412                 case KSYM_space:
4413                   result = old_player_nr + 1;
4414                   break;
4415
4416                 case KSYM_Up:
4417                 case KSYM_1:
4418                   result = 1;
4419                   break;
4420
4421                 case KSYM_Right:
4422                 case KSYM_2:
4423                   result = 2;
4424                   break;
4425
4426                 case KSYM_Down:
4427                 case KSYM_3:
4428                   result = 3;
4429                   break;
4430
4431                 case KSYM_Left:
4432                 case KSYM_4:
4433                   result = 4;
4434                   break;
4435
4436                 default:
4437                   break;
4438               }
4439             }
4440
4441             break;
4442           }
4443
4444           case EVENT_KEYRELEASE:
4445             ClearPlayerAction();
4446             break;
4447
4448           case SDL_CONTROLLERBUTTONDOWN:
4449             switch (event.cbutton.button)
4450             {
4451               case SDL_CONTROLLER_BUTTON_A:
4452               case SDL_CONTROLLER_BUTTON_X:
4453               case SDL_CONTROLLER_BUTTON_LEFTSHOULDER:
4454               case SDL_CONTROLLER_BUTTON_LEFTSTICK:
4455                 result = 1;
4456                 break;
4457
4458               case SDL_CONTROLLER_BUTTON_B:
4459               case SDL_CONTROLLER_BUTTON_Y:
4460               case SDL_CONTROLLER_BUTTON_RIGHTSHOULDER:
4461               case SDL_CONTROLLER_BUTTON_RIGHTSTICK:
4462               case SDL_CONTROLLER_BUTTON_BACK:
4463                 result = 0;
4464                 break;
4465             }
4466
4467             if (req_state & REQ_PLAYER)
4468             {
4469               int old_player_nr = setup.network_player_nr;
4470
4471               if (result != -1)
4472                 result = old_player_nr + 1;
4473
4474               switch (event.cbutton.button)
4475               {
4476                 case SDL_CONTROLLER_BUTTON_DPAD_UP:
4477                 case SDL_CONTROLLER_BUTTON_Y:
4478                   result = 1;
4479                   break;
4480
4481                 case SDL_CONTROLLER_BUTTON_DPAD_RIGHT:
4482                 case SDL_CONTROLLER_BUTTON_B:
4483                   result = 2;
4484                   break;
4485
4486                 case SDL_CONTROLLER_BUTTON_DPAD_DOWN:
4487                 case SDL_CONTROLLER_BUTTON_A:
4488                   result = 3;
4489                   break;
4490
4491                 case SDL_CONTROLLER_BUTTON_DPAD_LEFT:
4492                 case SDL_CONTROLLER_BUTTON_X:
4493                   result = 4;
4494                   break;
4495
4496                 default:
4497                   break;
4498               }
4499             }
4500
4501             break;
4502
4503           case SDL_CONTROLLERBUTTONUP:
4504             HandleJoystickEvent(&event);
4505             ClearPlayerAction();
4506             break;
4507
4508           default:
4509             HandleOtherEvents(&event);
4510             break;
4511         }
4512       }
4513     }
4514     else if (AnyJoystickButton() == JOY_BUTTON_NEW_PRESSED)
4515     {
4516       int joy = AnyJoystick();
4517
4518       if (joy & JOY_BUTTON_1)
4519         result = 1;
4520       else if (joy & JOY_BUTTON_2)
4521         result = 0;
4522     }
4523     else if (AnyJoystick())
4524     {
4525       int joy = AnyJoystick();
4526
4527       if (req_state & REQ_PLAYER)
4528       {
4529         if (joy & JOY_UP)
4530           result = 1;
4531         else if (joy & JOY_RIGHT)
4532           result = 2;
4533         else if (joy & JOY_DOWN)
4534           result = 3;
4535         else if (joy & JOY_LEFT)
4536           result = 4;
4537       }
4538     }
4539
4540     if (game_just_ended)
4541     {
4542       if (global.use_envelope_request)
4543       {
4544         // copy back current state of pressed buttons inside request area
4545         BlitBitmap(drawto, bitmap_db_store_2, sx, sy, width, height, sx, sy);
4546       }
4547     }
4548
4549     BackToFront();
4550   }
4551
4552   game.request_active = FALSE;
4553
4554   return result;
4555 }
4556
4557 static boolean RequestDoor(char *text, unsigned int req_state)
4558 {
4559   unsigned int old_door_state;
4560   int max_request_line_len = MAX_REQUEST_LINE_FONT1_LEN;
4561   int font_nr = FONT_TEXT_2;
4562   char *text_ptr;
4563   int result;
4564   int ty;
4565
4566   if (maxWordLengthInRequestString(text) > MAX_REQUEST_LINE_FONT1_LEN)
4567   {
4568     max_request_line_len = MAX_REQUEST_LINE_FONT2_LEN;
4569     font_nr = FONT_TEXT_1;
4570   }
4571
4572   if (game_status == GAME_MODE_PLAYING)
4573     BlitScreenToBitmap(backbuffer);
4574
4575   // disable deactivated drawing when quick-loading level tape recording
4576   if (tape.playing && tape.deactivate_display)
4577     TapeDeactivateDisplayOff(TRUE);
4578
4579   SetMouseCursor(CURSOR_DEFAULT);
4580
4581   // pause network game while waiting for request to answer
4582   if (network.enabled &&
4583       game_status == GAME_MODE_PLAYING &&
4584       !game.all_players_gone &&
4585       req_state & REQUEST_WAIT_FOR_INPUT)
4586     SendToServer_PausePlaying();
4587
4588   old_door_state = GetDoorState();
4589
4590   // simulate releasing mouse button over last gadget, if still pressed
4591   if (button_status)
4592     HandleGadgets(-1, -1, 0);
4593
4594   UnmapAllGadgets();
4595
4596   // draw released gadget before proceeding
4597   // BackToFront();
4598
4599   if (old_door_state & DOOR_OPEN_1)
4600   {
4601     CloseDoor(DOOR_CLOSE_1);
4602
4603     // save old door content
4604     BlitBitmap(bitmap_db_door_1, bitmap_db_door_1,
4605                0 * DXSIZE, 0, DXSIZE, DYSIZE, 1 * DXSIZE, 0);
4606   }
4607
4608   SetDoorBackgroundImage(IMG_BACKGROUND_DOOR);
4609   SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
4610
4611   // clear door drawing field
4612   DrawBackground(DX, DY, DXSIZE, DYSIZE);
4613
4614   // force DOOR font inside door area
4615   SetFontStatus(GAME_MODE_PSEUDO_DOOR);
4616
4617   // write text for request
4618   for (text_ptr = text, ty = 0; ty < MAX_REQUEST_LINES; ty++)
4619   {
4620     char text_line[max_request_line_len + 1];
4621     int tx, tl, tc = 0;
4622
4623     if (!*text_ptr)
4624       break;
4625
4626     for (tl = 0, tx = 0; tx < max_request_line_len; tl++, tx++)
4627     {
4628       tc = *(text_ptr + tx);
4629       // if (!tc || tc == ' ')
4630       if (!tc || tc == ' ' || tc == '?' || tc == '!')
4631         break;
4632     }
4633
4634     if ((tc == '?' || tc == '!') && tl == 0)
4635       tl = 1;
4636
4637     if (!tl)
4638     {
4639       text_ptr++;
4640       ty--;
4641       continue;
4642     }
4643
4644     strncpy(text_line, text_ptr, tl);
4645     text_line[tl] = 0;
4646
4647     DrawText(DX + (DXSIZE - tl * getFontWidth(font_nr)) / 2,
4648              DY + 8 + ty * (getFontHeight(font_nr) + 2),
4649              text_line, font_nr);
4650
4651     text_ptr += tl + (tc == ' ' ? 1 : 0);
4652     // text_ptr += tl + (tc == ' ' || tc == '?' || tc == '!' ? 1 : 0);
4653   }
4654
4655   ResetFontStatus();
4656
4657   if (req_state & REQ_ASK)
4658   {
4659     MapGadget(tool_gadget[TOOL_CTRL_ID_YES]);
4660     MapGadget(tool_gadget[TOOL_CTRL_ID_NO]);
4661   }
4662   else if (req_state & REQ_CONFIRM)
4663   {
4664     MapGadget(tool_gadget[TOOL_CTRL_ID_CONFIRM]);
4665   }
4666   else if (req_state & REQ_PLAYER)
4667   {
4668     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_1]);
4669     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_2]);
4670     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_3]);
4671     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_4]);
4672   }
4673
4674   // copy request gadgets to door backbuffer
4675   BlitBitmap(drawto, bitmap_db_door_1, DX, DY, DXSIZE, DYSIZE, 0, 0);
4676
4677   OpenDoor(DOOR_OPEN_1);
4678
4679   if (!(req_state & REQUEST_WAIT_FOR_INPUT))
4680   {
4681     if (game_status == GAME_MODE_PLAYING)
4682     {
4683       SetPanelBackground();
4684       SetDrawBackgroundMask(REDRAW_DOOR_1);
4685     }
4686     else
4687     {
4688       SetDrawBackgroundMask(REDRAW_FIELD);
4689     }
4690
4691     return FALSE;
4692   }
4693
4694   SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
4695
4696   // ---------- handle request buttons ----------
4697   result = RequestHandleEvents(req_state);
4698
4699   UnmapToolButtons();
4700
4701   if (!(req_state & REQ_STAY_OPEN))
4702   {
4703     CloseDoor(DOOR_CLOSE_1);
4704
4705     if (((old_door_state & DOOR_OPEN_1) && !(req_state & REQ_STAY_CLOSED)) ||
4706         (req_state & REQ_REOPEN))
4707       OpenDoor(DOOR_OPEN_1 | DOOR_COPY_BACK);
4708   }
4709
4710   RemapAllGadgets();
4711
4712   if (game_status == GAME_MODE_PLAYING)
4713   {
4714     SetPanelBackground();
4715     SetDrawBackgroundMask(REDRAW_DOOR_1);
4716   }
4717   else
4718   {
4719     SetDrawBackgroundMask(REDRAW_FIELD);
4720   }
4721
4722   // continue network game after request
4723   if (network.enabled &&
4724       game_status == GAME_MODE_PLAYING &&
4725       !game.all_players_gone &&
4726       req_state & REQUEST_WAIT_FOR_INPUT)
4727     SendToServer_ContinuePlaying();
4728
4729   // restore deactivated drawing when quick-loading level tape recording
4730   if (tape.playing && tape.deactivate_display)
4731     TapeDeactivateDisplayOn();
4732
4733   return result;
4734 }
4735
4736 static boolean RequestEnvelope(char *text, unsigned int req_state)
4737 {
4738   int result;
4739
4740   if (game_status == GAME_MODE_PLAYING)
4741     BlitScreenToBitmap(backbuffer);
4742
4743   // disable deactivated drawing when quick-loading level tape recording
4744   if (tape.playing && tape.deactivate_display)
4745     TapeDeactivateDisplayOff(TRUE);
4746
4747   SetMouseCursor(CURSOR_DEFAULT);
4748
4749   // pause network game while waiting for request to answer
4750   if (network.enabled &&
4751       game_status == GAME_MODE_PLAYING &&
4752       !game.all_players_gone &&
4753       req_state & REQUEST_WAIT_FOR_INPUT)
4754     SendToServer_PausePlaying();
4755
4756   // simulate releasing mouse button over last gadget, if still pressed
4757   if (button_status)
4758     HandleGadgets(-1, -1, 0);
4759
4760   UnmapAllGadgets();
4761
4762   // (replace with setting corresponding request background)
4763   // SetDoorBackgroundImage(IMG_BACKGROUND_DOOR);
4764   // SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
4765
4766   // clear door drawing field
4767   // DrawBackground(DX, DY, DXSIZE, DYSIZE);
4768
4769   ShowEnvelopeRequest(text, req_state, ACTION_OPENING);
4770
4771   if (!(req_state & REQUEST_WAIT_FOR_INPUT))
4772   {
4773     if (game_status == GAME_MODE_PLAYING)
4774     {
4775       SetPanelBackground();
4776       SetDrawBackgroundMask(REDRAW_DOOR_1);
4777     }
4778     else
4779     {
4780       SetDrawBackgroundMask(REDRAW_FIELD);
4781     }
4782
4783     return FALSE;
4784   }
4785
4786   SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
4787
4788   // ---------- handle request buttons ----------
4789   result = RequestHandleEvents(req_state);
4790
4791   UnmapToolButtons();
4792
4793   ShowEnvelopeRequest(text, req_state, ACTION_CLOSING);
4794
4795   RemapAllGadgets();
4796
4797   if (game_status == GAME_MODE_PLAYING)
4798   {
4799     SetPanelBackground();
4800     SetDrawBackgroundMask(REDRAW_DOOR_1);
4801   }
4802   else
4803   {
4804     SetDrawBackgroundMask(REDRAW_FIELD);
4805   }
4806
4807   // continue network game after request
4808   if (network.enabled &&
4809       game_status == GAME_MODE_PLAYING &&
4810       !game.all_players_gone &&
4811       req_state & REQUEST_WAIT_FOR_INPUT)
4812     SendToServer_ContinuePlaying();
4813
4814   // restore deactivated drawing when quick-loading level tape recording
4815   if (tape.playing && tape.deactivate_display)
4816     TapeDeactivateDisplayOn();
4817
4818   return result;
4819 }
4820
4821 boolean Request(char *text, unsigned int req_state)
4822 {
4823   boolean overlay_enabled = GetOverlayEnabled();
4824   boolean result;
4825
4826   SetOverlayEnabled(FALSE);
4827
4828   if (global.use_envelope_request)
4829     result = RequestEnvelope(text, req_state);
4830   else
4831     result = RequestDoor(text, req_state);
4832
4833   SetOverlayEnabled(overlay_enabled);
4834
4835   return result;
4836 }
4837
4838 static int compareDoorPartOrderInfo(const void *object1, const void *object2)
4839 {
4840   const struct DoorPartOrderInfo *dpo1 = (struct DoorPartOrderInfo *)object1;
4841   const struct DoorPartOrderInfo *dpo2 = (struct DoorPartOrderInfo *)object2;
4842   int compare_result;
4843
4844   if (dpo1->sort_priority != dpo2->sort_priority)
4845     compare_result = dpo1->sort_priority - dpo2->sort_priority;
4846   else
4847     compare_result = dpo1->nr - dpo2->nr;
4848
4849   return compare_result;
4850 }
4851
4852 void InitGraphicCompatibilityInfo_Doors(void)
4853 {
4854   struct
4855   {
4856     int door_token;
4857     int part_1, part_8;
4858     struct DoorInfo *door;
4859   }
4860   doors[] =
4861   {
4862     { DOOR_1,   IMG_GFX_DOOR_1_PART_1,  IMG_GFX_DOOR_1_PART_8,  &door_1 },
4863     { DOOR_2,   IMG_GFX_DOOR_2_PART_1,  IMG_GFX_DOOR_2_PART_8,  &door_2 },
4864
4865     { -1,       -1,                     -1,                     NULL    }
4866   };
4867   struct Rect door_rect_list[] =
4868   {
4869     { DX, DY, DXSIZE, DYSIZE },
4870     { VX, VY, VXSIZE, VYSIZE }
4871   };
4872   int i, j;
4873
4874   for (i = 0; doors[i].door_token != -1; i++)
4875   {
4876     int door_token = doors[i].door_token;
4877     int door_index = DOOR_INDEX_FROM_TOKEN(door_token);
4878     int part_1 = doors[i].part_1;
4879     int part_8 = doors[i].part_8;
4880     int part_2 = part_1 + 1;
4881     int part_3 = part_1 + 2;
4882     struct DoorInfo *door = doors[i].door;
4883     struct Rect *door_rect = &door_rect_list[door_index];
4884     boolean door_gfx_redefined = FALSE;
4885
4886     // check if any door part graphic definitions have been redefined
4887
4888     for (j = 0; door_part_controls[j].door_token != -1; j++)
4889     {
4890       struct DoorPartControlInfo *dpc = &door_part_controls[j];
4891       struct FileInfo *fi = getImageListEntryFromImageID(dpc->graphic);
4892
4893       if (dpc->door_token == door_token && fi->redefined)
4894         door_gfx_redefined = TRUE;
4895     }
4896
4897     // check for old-style door graphic/animation modifications
4898
4899     if (!door_gfx_redefined)
4900     {
4901       if (door->anim_mode & ANIM_STATIC_PANEL)
4902       {
4903         door->panel.step_xoffset = 0;
4904         door->panel.step_yoffset = 0;
4905       }
4906
4907       if (door->anim_mode & (ANIM_HORIZONTAL | ANIM_VERTICAL))
4908       {
4909         struct GraphicInfo *g_part_1 = &graphic_info[part_1];
4910         struct GraphicInfo *g_part_2 = &graphic_info[part_2];
4911         int num_door_steps, num_panel_steps;
4912
4913         // remove door part graphics other than the two default wings
4914
4915         for (j = 0; door_part_controls[j].door_token != -1; j++)
4916         {
4917           struct DoorPartControlInfo *dpc = &door_part_controls[j];
4918           struct GraphicInfo *g = &graphic_info[dpc->graphic];
4919
4920           if (dpc->graphic >= part_3 &&
4921               dpc->graphic <= part_8)
4922             g->bitmap = NULL;
4923         }
4924
4925         // set graphics and screen positions of the default wings
4926
4927         g_part_1->width  = door_rect->width;
4928         g_part_1->height = door_rect->height;
4929         g_part_2->width  = door_rect->width;
4930         g_part_2->height = door_rect->height;
4931         g_part_2->src_x = door_rect->width;
4932         g_part_2->src_y = g_part_1->src_y;
4933
4934         door->part_2.x = door->part_1.x;
4935         door->part_2.y = door->part_1.y;
4936
4937         if (door->width != -1)
4938         {
4939           g_part_1->width = door->width;
4940           g_part_2->width = door->width;
4941
4942           // special treatment for graphics and screen position of right wing
4943           g_part_2->src_x += door_rect->width - door->width;
4944           door->part_2.x  += door_rect->width - door->width;
4945         }
4946
4947         if (door->height != -1)
4948         {
4949           g_part_1->height = door->height;
4950           g_part_2->height = door->height;
4951
4952           // special treatment for graphics and screen position of bottom wing
4953           g_part_2->src_y += door_rect->height - door->height;
4954           door->part_2.y  += door_rect->height - door->height;
4955         }
4956
4957         // set animation delays for the default wings and panels
4958
4959         door->part_1.step_delay = door->step_delay;
4960         door->part_2.step_delay = door->step_delay;
4961         door->panel.step_delay  = door->step_delay;
4962
4963         // set animation draw order for the default wings
4964
4965         door->part_1.sort_priority = 2; // draw left wing over ...
4966         door->part_2.sort_priority = 1; //          ... right wing
4967
4968         // set animation draw offset for the default wings
4969
4970         if (door->anim_mode & ANIM_HORIZONTAL)
4971         {
4972           door->part_1.step_xoffset = door->step_offset;
4973           door->part_1.step_yoffset = 0;
4974           door->part_2.step_xoffset = door->step_offset * -1;
4975           door->part_2.step_yoffset = 0;
4976
4977           num_door_steps = g_part_1->width / door->step_offset;
4978         }
4979         else    // ANIM_VERTICAL
4980         {
4981           door->part_1.step_xoffset = 0;
4982           door->part_1.step_yoffset = door->step_offset;
4983           door->part_2.step_xoffset = 0;
4984           door->part_2.step_yoffset = door->step_offset * -1;
4985
4986           num_door_steps = g_part_1->height / door->step_offset;
4987         }
4988
4989         // set animation draw offset for the default panels
4990
4991         if (door->step_offset > 1)
4992         {
4993           num_panel_steps = 2 * door_rect->height / door->step_offset;
4994           door->panel.start_step = num_panel_steps - num_door_steps;
4995           door->panel.start_step_closing = door->panel.start_step;
4996         }
4997         else
4998         {
4999           num_panel_steps = door_rect->height / door->step_offset;
5000           door->panel.start_step = num_panel_steps - num_door_steps / 2;
5001           door->panel.start_step_closing = door->panel.start_step;
5002           door->panel.step_delay *= 2;
5003         }
5004       }
5005     }
5006   }
5007 }
5008
5009 void InitDoors(void)
5010 {
5011   int i;
5012
5013   for (i = 0; door_part_controls[i].door_token != -1; i++)
5014   {
5015     struct DoorPartControlInfo *dpc = &door_part_controls[i];
5016     struct DoorPartOrderInfo *dpo = &door_part_order[i];
5017
5018     // initialize "start_step_opening" and "start_step_closing", if needed
5019     if (dpc->pos->start_step_opening == 0 &&
5020         dpc->pos->start_step_closing == 0)
5021     {
5022       // dpc->pos->start_step_opening = dpc->pos->start_step;
5023       dpc->pos->start_step_closing = dpc->pos->start_step;
5024     }
5025
5026     // fill structure for door part draw order (sorted below)
5027     dpo->nr = i;
5028     dpo->sort_priority = dpc->pos->sort_priority;
5029   }
5030
5031   // sort door part controls according to sort_priority and graphic number
5032   qsort(door_part_order, MAX_DOOR_PARTS,
5033         sizeof(struct DoorPartOrderInfo), compareDoorPartOrderInfo);
5034 }
5035
5036 unsigned int OpenDoor(unsigned int door_state)
5037 {
5038   if (door_state & DOOR_COPY_BACK)
5039   {
5040     if (door_state & DOOR_OPEN_1)
5041       BlitBitmap(bitmap_db_door_1, bitmap_db_door_1,
5042                  1 * DXSIZE, 0, DXSIZE, DYSIZE, 0 * DXSIZE, 0);
5043
5044     if (door_state & DOOR_OPEN_2)
5045       BlitBitmap(bitmap_db_door_2, bitmap_db_door_2,
5046                  1 * VXSIZE, 0, VXSIZE, VYSIZE, 0 * VXSIZE, 0);
5047
5048     door_state &= ~DOOR_COPY_BACK;
5049   }
5050
5051   return MoveDoor(door_state);
5052 }
5053
5054 unsigned int CloseDoor(unsigned int door_state)
5055 {
5056   unsigned int old_door_state = GetDoorState();
5057
5058   if (!(door_state & DOOR_NO_COPY_BACK))
5059   {
5060     if (old_door_state & DOOR_OPEN_1)
5061       BlitBitmap(backbuffer, bitmap_db_door_1,
5062                  DX, DY, DXSIZE, DYSIZE, 0, 0);
5063
5064     if (old_door_state & DOOR_OPEN_2)
5065       BlitBitmap(backbuffer, bitmap_db_door_2,
5066                  VX, VY, VXSIZE, VYSIZE, 0, 0);
5067
5068     door_state &= ~DOOR_NO_COPY_BACK;
5069   }
5070
5071   return MoveDoor(door_state);
5072 }
5073
5074 unsigned int GetDoorState(void)
5075 {
5076   return MoveDoor(DOOR_GET_STATE);
5077 }
5078
5079 unsigned int SetDoorState(unsigned int door_state)
5080 {
5081   return MoveDoor(door_state | DOOR_SET_STATE);
5082 }
5083
5084 static int euclid(int a, int b)
5085 {
5086   return (b ? euclid(b, a % b) : a);
5087 }
5088
5089 unsigned int MoveDoor(unsigned int door_state)
5090 {
5091   struct Rect door_rect_list[] =
5092   {
5093     { DX, DY, DXSIZE, DYSIZE },
5094     { VX, VY, VXSIZE, VYSIZE }
5095   };
5096   static int door1 = DOOR_CLOSE_1;
5097   static int door2 = DOOR_CLOSE_2;
5098   unsigned int door_delay = 0;
5099   unsigned int door_delay_value;
5100   int i;
5101
5102   if (door_state == DOOR_GET_STATE)
5103     return (door1 | door2);
5104
5105   if (door_state & DOOR_SET_STATE)
5106   {
5107     if (door_state & DOOR_ACTION_1)
5108       door1 = door_state & DOOR_ACTION_1;
5109     if (door_state & DOOR_ACTION_2)
5110       door2 = door_state & DOOR_ACTION_2;
5111
5112     return (door1 | door2);
5113   }
5114
5115   if (!(door_state & DOOR_FORCE_REDRAW))
5116   {
5117     if (door1 == DOOR_OPEN_1 && door_state & DOOR_OPEN_1)
5118       door_state &= ~DOOR_OPEN_1;
5119     else if (door1 == DOOR_CLOSE_1 && door_state & DOOR_CLOSE_1)
5120       door_state &= ~DOOR_CLOSE_1;
5121     if (door2 == DOOR_OPEN_2 && door_state & DOOR_OPEN_2)
5122       door_state &= ~DOOR_OPEN_2;
5123     else if (door2 == DOOR_CLOSE_2 && door_state & DOOR_CLOSE_2)
5124       door_state &= ~DOOR_CLOSE_2;
5125   }
5126
5127   if (global.autoplay_leveldir)
5128   {
5129     door_state |= DOOR_NO_DELAY;
5130     door_state &= ~DOOR_CLOSE_ALL;
5131   }
5132
5133   if (game_status == GAME_MODE_EDITOR && !(door_state & DOOR_FORCE_ANIM))
5134     door_state |= DOOR_NO_DELAY;
5135
5136   if (door_state & DOOR_ACTION)
5137   {
5138     boolean door_panel_drawn[NUM_DOORS];
5139     boolean panel_has_doors[NUM_DOORS];
5140     boolean door_part_skip[MAX_DOOR_PARTS];
5141     boolean door_part_done[MAX_DOOR_PARTS];
5142     boolean door_part_done_all;
5143     int num_steps[MAX_DOOR_PARTS];
5144     int max_move_delay = 0;     // delay for complete animations of all doors
5145     int max_step_delay = 0;     // delay (ms) between two animation frames
5146     int num_move_steps = 0;     // number of animation steps for all doors
5147     int max_move_delay_doors_only = 0;  // delay for doors only (no panel)
5148     int num_move_steps_doors_only = 0;  // steps for doors only (no panel)
5149     int current_move_delay = 0;
5150     int start = 0;
5151     int k;
5152
5153     for (i = 0; i < NUM_DOORS; i++)
5154       panel_has_doors[i] = FALSE;
5155
5156     for (i = 0; i < MAX_DOOR_PARTS; i++)
5157     {
5158       struct DoorPartControlInfo *dpc = &door_part_controls[i];
5159       struct GraphicInfo *g = &graphic_info[dpc->graphic];
5160       int door_token = dpc->door_token;
5161
5162       door_part_done[i] = FALSE;
5163       door_part_skip[i] = (!(door_state & door_token) ||
5164                            !g->bitmap);
5165     }
5166
5167     for (i = 0; i < MAX_DOOR_PARTS; i++)
5168     {
5169       int nr = door_part_order[i].nr;
5170       struct DoorPartControlInfo *dpc = &door_part_controls[nr];
5171       struct DoorPartPosInfo *pos = dpc->pos;
5172       struct GraphicInfo *g = &graphic_info[dpc->graphic];
5173       int door_token = dpc->door_token;
5174       int door_index = DOOR_INDEX_FROM_TOKEN(door_token);
5175       boolean is_panel = DOOR_PART_IS_PANEL(nr);
5176       int step_xoffset = ABS(pos->step_xoffset);
5177       int step_yoffset = ABS(pos->step_yoffset);
5178       int step_delay = pos->step_delay;
5179       int current_door_state = door_state & door_token;
5180       boolean door_opening = ((current_door_state & DOOR_OPEN)  != 0);
5181       boolean door_closing = ((current_door_state & DOOR_CLOSE) != 0);
5182       boolean part_opening = (is_panel ? door_closing : door_opening);
5183       int start_step = (part_opening ? pos->start_step_opening :
5184                         pos->start_step_closing);
5185       float move_xsize = (step_xoffset ? g->width  : 0);
5186       float move_ysize = (step_yoffset ? g->height : 0);
5187       int move_xsteps = (step_xoffset ? ceil(move_xsize / step_xoffset) : 0);
5188       int move_ysteps = (step_yoffset ? ceil(move_ysize / step_yoffset) : 0);
5189       int move_steps = (move_xsteps && move_ysteps ?
5190                         MIN(move_xsteps, move_ysteps) :
5191                         move_xsteps ? move_xsteps : move_ysteps) - start_step;
5192       int move_delay = move_steps * step_delay;
5193
5194       if (door_part_skip[nr])
5195         continue;
5196
5197       max_move_delay = MAX(max_move_delay, move_delay);
5198       max_step_delay = (max_step_delay == 0 ? step_delay :
5199                         euclid(max_step_delay, step_delay));
5200       num_steps[nr] = move_steps;
5201
5202       if (!is_panel)
5203       {
5204         max_move_delay_doors_only = MAX(max_move_delay_doors_only, move_delay);
5205
5206         panel_has_doors[door_index] = TRUE;
5207       }
5208     }
5209
5210     max_step_delay = MAX(1, max_step_delay);    // prevent division by zero
5211
5212     num_move_steps = max_move_delay / max_step_delay;
5213     num_move_steps_doors_only = max_move_delay_doors_only / max_step_delay;
5214
5215     door_delay_value = max_step_delay;
5216
5217     if ((door_state & DOOR_NO_DELAY) || setup.quick_doors)
5218     {
5219       start = num_move_steps - 1;
5220     }
5221     else
5222     {
5223       // opening door sound has priority over simultaneously closing door
5224       if (door_state & (DOOR_OPEN_1 | DOOR_OPEN_2))
5225       {
5226         PlayMenuSoundStereo(SND_DOOR_OPENING, SOUND_MIDDLE);
5227
5228         if (door_state & DOOR_OPEN_1)
5229           PlayMenuSoundStereo(SND_DOOR_1_OPENING, SOUND_MIDDLE);
5230         if (door_state & DOOR_OPEN_2)
5231           PlayMenuSoundStereo(SND_DOOR_2_OPENING, SOUND_MIDDLE);
5232       }
5233       else if (door_state & (DOOR_CLOSE_1 | DOOR_CLOSE_2))
5234       {
5235         PlayMenuSoundStereo(SND_DOOR_CLOSING, SOUND_MIDDLE);
5236
5237         if (door_state & DOOR_CLOSE_1)
5238           PlayMenuSoundStereo(SND_DOOR_1_CLOSING, SOUND_MIDDLE);
5239         if (door_state & DOOR_CLOSE_2)
5240           PlayMenuSoundStereo(SND_DOOR_2_CLOSING, SOUND_MIDDLE);
5241       }
5242     }
5243
5244     for (k = start; k < num_move_steps; k++)
5245     {
5246       int last_frame = num_move_steps - 1;      // last frame of this "for" loop
5247
5248       door_part_done_all = TRUE;
5249
5250       for (i = 0; i < NUM_DOORS; i++)
5251         door_panel_drawn[i] = FALSE;
5252
5253       for (i = 0; i < MAX_DOOR_PARTS; i++)
5254       {
5255         int nr = door_part_order[i].nr;
5256         struct DoorPartControlInfo *dpc = &door_part_controls[nr];
5257         struct DoorPartPosInfo *pos = dpc->pos;
5258         struct GraphicInfo *g = &graphic_info[dpc->graphic];
5259         int door_token = dpc->door_token;
5260         int door_index = DOOR_INDEX_FROM_TOKEN(door_token);
5261         boolean is_panel = DOOR_PART_IS_PANEL(nr);
5262         boolean is_panel_and_door_has_closed = FALSE;
5263         struct Rect *door_rect = &door_rect_list[door_index];
5264         Bitmap *bitmap_db_door = (door_token == DOOR_1 ? bitmap_db_door_1 :
5265                                   bitmap_db_door_2);
5266         Bitmap *bitmap = (is_panel ? bitmap_db_door : g->bitmap);
5267         int current_door_state = door_state & door_token;
5268         boolean door_opening = ((current_door_state & DOOR_OPEN)  != 0);
5269         boolean door_closing = !door_opening;
5270         boolean part_opening = (is_panel ? door_closing : door_opening);
5271         boolean part_closing = !part_opening;
5272         int start_step = (part_opening ? pos->start_step_opening :
5273                           pos->start_step_closing);
5274         int step_delay = pos->step_delay;
5275         int step_factor = step_delay / max_step_delay;
5276         int k1 = (step_factor ? k / step_factor + 1 : k);
5277         int k2 = (part_opening ? k1 + start_step : num_steps[nr] - k1);
5278         int kk = MAX(0, k2);
5279         int g_src_x = 0;
5280         int g_src_y = 0;
5281         int src_x, src_y, src_xx, src_yy;
5282         int dst_x, dst_y, dst_xx, dst_yy;
5283         int width, height;
5284
5285         if (door_part_skip[nr])
5286           continue;
5287
5288         if (!(door_state & door_token))
5289           continue;
5290
5291         if (!g->bitmap)
5292           continue;
5293
5294         if (!is_panel)
5295         {
5296           int k2_door = (door_opening ? k : num_move_steps_doors_only - k - 1);
5297           int kk_door = MAX(0, k2_door);
5298           int sync_frame = kk_door * door_delay_value;
5299           int frame = getGraphicAnimationFrame(dpc->graphic, sync_frame);
5300
5301           getFixedGraphicSource(dpc->graphic, frame, &bitmap,
5302                                 &g_src_x, &g_src_y);
5303         }
5304
5305         // draw door panel
5306
5307         if (!door_panel_drawn[door_index])
5308         {
5309           ClearRectangle(drawto, door_rect->x, door_rect->y,
5310                          door_rect->width, door_rect->height);
5311
5312           door_panel_drawn[door_index] = TRUE;
5313         }
5314
5315         // draw opening or closing door parts
5316
5317         if (pos->step_xoffset < 0)      // door part on right side
5318         {
5319           src_xx = 0;
5320           dst_xx = pos->x + ABS(kk * pos->step_xoffset);
5321           width = g->width;
5322
5323           if (dst_xx + width > door_rect->width)
5324             width = door_rect->width - dst_xx;
5325         }
5326         else                            // door part on left side
5327         {
5328           src_xx = 0;
5329           dst_xx = pos->x - kk * pos->step_xoffset;
5330
5331           if (dst_xx < 0)
5332           {
5333             src_xx = ABS(dst_xx);
5334             dst_xx = 0;
5335           }
5336
5337           width = g->width - src_xx;
5338
5339           if (width > door_rect->width)
5340             width = door_rect->width;
5341
5342           // printf("::: k == %d [%d] \n", k, start_step);
5343         }
5344
5345         if (pos->step_yoffset < 0)      // door part on bottom side
5346         {
5347           src_yy = 0;
5348           dst_yy = pos->y + ABS(kk * pos->step_yoffset);
5349           height = g->height;
5350
5351           if (dst_yy + height > door_rect->height)
5352             height = door_rect->height - dst_yy;
5353         }
5354         else                            // door part on top side
5355         {
5356           src_yy = 0;
5357           dst_yy = pos->y - kk * pos->step_yoffset;
5358
5359           if (dst_yy < 0)
5360           {
5361             src_yy = ABS(dst_yy);
5362             dst_yy = 0;
5363           }
5364
5365           height = g->height - src_yy;
5366         }
5367
5368         src_x = g_src_x + src_xx;
5369         src_y = g_src_y + src_yy;
5370
5371         dst_x = door_rect->x + dst_xx;
5372         dst_y = door_rect->y + dst_yy;
5373
5374         is_panel_and_door_has_closed =
5375           (is_panel &&
5376            door_closing &&
5377            panel_has_doors[door_index] &&
5378            k >= num_move_steps_doors_only - 1);
5379
5380         if (width  >= 0 && width  <= g->width &&
5381             height >= 0 && height <= g->height &&
5382             !is_panel_and_door_has_closed)
5383         {
5384           if (is_panel || !pos->draw_masked)
5385             BlitBitmap(bitmap, drawto, src_x, src_y, width, height,
5386                        dst_x, dst_y);
5387           else
5388             BlitBitmapMasked(bitmap, drawto, src_x, src_y, width, height,
5389                              dst_x, dst_y);
5390         }
5391
5392         redraw_mask |= REDRAW_DOOR_FROM_TOKEN(door_token);
5393
5394         if ((part_opening && (width < 0         || height < 0)) ||
5395             (part_closing && (width >= g->width && height >= g->height)))
5396           door_part_done[nr] = TRUE;
5397
5398         // continue door part animations, but not panel after door has closed
5399         if (!door_part_done[nr] && !is_panel_and_door_has_closed)
5400           door_part_done_all = FALSE;
5401       }
5402
5403       if (!(door_state & DOOR_NO_DELAY))
5404       {
5405         BackToFront();
5406
5407         SkipUntilDelayReached(&door_delay, door_delay_value, &k, last_frame);
5408
5409         current_move_delay += max_step_delay;
5410
5411         // prevent OS (Windows) from complaining about program not responding
5412         CheckQuitEvent();
5413       }
5414
5415       if (door_part_done_all)
5416         break;
5417     }
5418
5419     if (!(door_state & DOOR_NO_DELAY))
5420     {
5421       // wait for specified door action post delay
5422       if (door_state & DOOR_ACTION_1 && door_state & DOOR_ACTION_2)
5423         door_delay_value = MAX(door_1.post_delay, door_2.post_delay);
5424       else if (door_state & DOOR_ACTION_1)
5425         door_delay_value = door_1.post_delay;
5426       else if (door_state & DOOR_ACTION_2)
5427         door_delay_value = door_2.post_delay;
5428
5429       while (!DelayReached(&door_delay, door_delay_value))
5430         BackToFront();
5431     }
5432   }
5433
5434   if (door_state & DOOR_ACTION_1)
5435     door1 = door_state & DOOR_ACTION_1;
5436   if (door_state & DOOR_ACTION_2)
5437     door2 = door_state & DOOR_ACTION_2;
5438
5439   // draw masked border over door area
5440   DrawMaskedBorder(REDRAW_DOOR_1);
5441   DrawMaskedBorder(REDRAW_DOOR_2);
5442
5443   ClearAutoRepeatKeyEvents();
5444
5445   return (door1 | door2);
5446 }
5447
5448 static boolean useSpecialEditorDoor(void)
5449 {
5450   int graphic = IMG_GLOBAL_BORDER_EDITOR;
5451   boolean redefined = getImageListEntryFromImageID(graphic)->redefined;
5452
5453   // do not draw special editor door if editor border defined or redefined
5454   if (graphic_info[graphic].bitmap != NULL || redefined)
5455     return FALSE;
5456
5457   // do not draw special editor door if global border defined to be empty
5458   if (graphic_info[IMG_GLOBAL_BORDER].bitmap == NULL)
5459     return FALSE;
5460
5461   // do not draw special editor door if viewport definitions do not match
5462   if (EX != VX ||
5463       EY >= VY ||
5464       EXSIZE != VXSIZE ||
5465       EY + EYSIZE != VY + VYSIZE)
5466     return FALSE;
5467
5468   return TRUE;
5469 }
5470
5471 void DrawSpecialEditorDoor(void)
5472 {
5473   struct GraphicInfo *gfx1 = &graphic_info[IMG_DOOR_2_TOP_BORDER_CORRECTION];
5474   int top_border_width = gfx1->width;
5475   int top_border_height = gfx1->height;
5476   int outer_border = viewport.door_2[GAME_MODE_EDITOR].border_size;
5477   int ex = EX - outer_border;
5478   int ey = EY - outer_border;
5479   int vy = VY - outer_border;
5480   int exsize = EXSIZE + 2 * outer_border;
5481
5482   if (!useSpecialEditorDoor())
5483     return;
5484
5485   // draw bigger level editor toolbox window
5486   BlitBitmap(gfx1->bitmap, drawto, gfx1->src_x, gfx1->src_y,
5487              top_border_width, top_border_height, ex, ey - top_border_height);
5488   BlitBitmap(graphic_info[IMG_GLOBAL_BORDER].bitmap, drawto, ex, vy,
5489              exsize, EYSIZE - VYSIZE + outer_border, ex, ey);
5490
5491   redraw_mask |= REDRAW_ALL;
5492 }
5493
5494 void UndrawSpecialEditorDoor(void)
5495 {
5496   struct GraphicInfo *gfx1 = &graphic_info[IMG_DOOR_2_TOP_BORDER_CORRECTION];
5497   int top_border_width = gfx1->width;
5498   int top_border_height = gfx1->height;
5499   int outer_border = viewport.door_2[GAME_MODE_EDITOR].border_size;
5500   int ex = EX - outer_border;
5501   int ey = EY - outer_border;
5502   int ey_top = ey - top_border_height;
5503   int exsize = EXSIZE + 2 * outer_border;
5504   int eysize = EYSIZE + 2 * outer_border;
5505
5506   if (!useSpecialEditorDoor())
5507     return;
5508
5509   // draw normal tape recorder window
5510   if (graphic_info[IMG_GLOBAL_BORDER].bitmap)
5511   {
5512     BlitBitmap(graphic_info[IMG_GLOBAL_BORDER].bitmap, drawto,
5513                ex, ey_top, top_border_width, top_border_height,
5514                ex, ey_top);
5515     BlitBitmap(graphic_info[IMG_GLOBAL_BORDER].bitmap, drawto,
5516                ex, ey, exsize, eysize, ex, ey);
5517   }
5518   else
5519   {
5520     // if screen background is set to "[NONE]", clear editor toolbox window
5521     ClearRectangle(drawto, ex, ey_top, top_border_width, top_border_height);
5522     ClearRectangle(drawto, ex, ey, exsize, eysize);
5523   }
5524
5525   redraw_mask |= REDRAW_ALL;
5526 }
5527
5528
5529 // ---------- new tool button stuff -------------------------------------------
5530
5531 static struct
5532 {
5533   int graphic;
5534   struct TextPosInfo *pos;
5535   int gadget_id;
5536   char *infotext;
5537 } toolbutton_info[NUM_TOOL_BUTTONS] =
5538 {
5539   {
5540     IMG_GFX_REQUEST_BUTTON_YES,         &request.button.yes,
5541     TOOL_CTRL_ID_YES,                   "yes"
5542   },
5543   {
5544     IMG_GFX_REQUEST_BUTTON_NO,          &request.button.no,
5545     TOOL_CTRL_ID_NO,                    "no"
5546   },
5547   {
5548     IMG_GFX_REQUEST_BUTTON_CONFIRM,     &request.button.confirm,
5549     TOOL_CTRL_ID_CONFIRM,               "confirm"
5550   },
5551   {
5552     IMG_GFX_REQUEST_BUTTON_PLAYER_1,    &request.button.player_1,
5553     TOOL_CTRL_ID_PLAYER_1,              "player 1"
5554   },
5555   {
5556     IMG_GFX_REQUEST_BUTTON_PLAYER_2,    &request.button.player_2,
5557     TOOL_CTRL_ID_PLAYER_2,              "player 2"
5558   },
5559   {
5560     IMG_GFX_REQUEST_BUTTON_PLAYER_3,    &request.button.player_3,
5561     TOOL_CTRL_ID_PLAYER_3,              "player 3"
5562   },
5563   {
5564     IMG_GFX_REQUEST_BUTTON_PLAYER_4,    &request.button.player_4,
5565     TOOL_CTRL_ID_PLAYER_4,              "player 4"
5566   }
5567 };
5568
5569 void CreateToolButtons(void)
5570 {
5571   int i;
5572
5573   for (i = 0; i < NUM_TOOL_BUTTONS; i++)
5574   {
5575     int graphic = toolbutton_info[i].graphic;
5576     struct GraphicInfo *gfx = &graphic_info[graphic];
5577     struct TextPosInfo *pos = toolbutton_info[i].pos;
5578     struct GadgetInfo *gi;
5579     Bitmap *deco_bitmap = None;
5580     int deco_x = 0, deco_y = 0, deco_xpos = 0, deco_ypos = 0;
5581     unsigned int event_mask = GD_EVENT_RELEASED;
5582     int dx = DX;
5583     int dy = DY;
5584     int gd_x = gfx->src_x;
5585     int gd_y = gfx->src_y;
5586     int gd_xp = gfx->src_x + gfx->pressed_xoffset;
5587     int gd_yp = gfx->src_y + gfx->pressed_yoffset;
5588     int x = pos->x;
5589     int y = pos->y;
5590     int id = i;
5591
5592     if (global.use_envelope_request)
5593     {
5594       setRequestPosition(&dx, &dy, TRUE);
5595
5596       // check if request buttons are outside of envelope and fix, if needed
5597       if (x < 0 || x + gfx->width  > request.width ||
5598           y < 0 || y + gfx->height > request.height)
5599       {
5600         if (id == TOOL_CTRL_ID_YES)
5601         {
5602           x = 0;
5603           y = request.height - 2 * request.border_size - gfx->height;
5604         }
5605         else if (id == TOOL_CTRL_ID_NO)
5606         {
5607           x = request.width  - 2 * request.border_size - gfx->width;
5608           y = request.height - 2 * request.border_size - gfx->height;
5609         }
5610         else if (id == TOOL_CTRL_ID_CONFIRM)
5611         {
5612           x = (request.width - 2 * request.border_size - gfx->width) / 2;
5613           y = request.height - 2 * request.border_size - gfx->height;
5614         }
5615         else if (id >= TOOL_CTRL_ID_PLAYER_1 && id <= TOOL_CTRL_ID_PLAYER_4)
5616         {
5617           int player_nr = id - TOOL_CTRL_ID_PLAYER_1;
5618
5619           x = (request.width - 2 * request.border_size - gfx->width) / 2;
5620           y = request.height - 2 * request.border_size - gfx->height * 2;
5621
5622           x += (player_nr == 3 ? -1 : player_nr == 1 ? +1 : 0) * gfx->width;
5623           y += (player_nr == 0 ? -1 : player_nr == 2 ? +1 : 0) * gfx->height;
5624         }
5625       }
5626     }
5627
5628     if (id >= TOOL_CTRL_ID_PLAYER_1 && id <= TOOL_CTRL_ID_PLAYER_4)
5629     {
5630       int player_nr = id - TOOL_CTRL_ID_PLAYER_1;
5631
5632       getSizedGraphicSource(PLAYER_NR_GFX(IMG_PLAYER_1, player_nr), 0,
5633                             pos->size, &deco_bitmap, &deco_x, &deco_y);
5634       deco_xpos = (gfx->width  - pos->size) / 2;
5635       deco_ypos = (gfx->height - pos->size) / 2;
5636     }
5637
5638     gi = CreateGadget(GDI_CUSTOM_ID, id,
5639                       GDI_IMAGE_ID, graphic,
5640                       GDI_INFO_TEXT, toolbutton_info[i].infotext,
5641                       GDI_X, dx + x,
5642                       GDI_Y, dy + y,
5643                       GDI_WIDTH, gfx->width,
5644                       GDI_HEIGHT, gfx->height,
5645                       GDI_TYPE, GD_TYPE_NORMAL_BUTTON,
5646                       GDI_STATE, GD_BUTTON_UNPRESSED,
5647                       GDI_DESIGN_UNPRESSED, gfx->bitmap, gd_x, gd_y,
5648                       GDI_DESIGN_PRESSED, gfx->bitmap, gd_xp, gd_yp,
5649                       GDI_DECORATION_DESIGN, deco_bitmap, deco_x, deco_y,
5650                       GDI_DECORATION_POSITION, deco_xpos, deco_ypos,
5651                       GDI_DECORATION_SIZE, pos->size, pos->size,
5652                       GDI_DECORATION_SHIFTING, 1, 1,
5653                       GDI_DIRECT_DRAW, FALSE,
5654                       GDI_EVENT_MASK, event_mask,
5655                       GDI_CALLBACK_ACTION, HandleToolButtons,
5656                       GDI_END);
5657
5658     if (gi == NULL)
5659       Error(ERR_EXIT, "cannot create gadget");
5660
5661     tool_gadget[id] = gi;
5662   }
5663 }
5664
5665 void FreeToolButtons(void)
5666 {
5667   int i;
5668
5669   for (i = 0; i < NUM_TOOL_BUTTONS; i++)
5670     FreeGadget(tool_gadget[i]);
5671 }
5672
5673 static void UnmapToolButtons(void)
5674 {
5675   int i;
5676
5677   for (i = 0; i < NUM_TOOL_BUTTONS; i++)
5678     UnmapGadget(tool_gadget[i]);
5679 }
5680
5681 static void HandleToolButtons(struct GadgetInfo *gi)
5682 {
5683   request_gadget_id = gi->custom_id;
5684 }
5685
5686 static struct Mapping_EM_to_RND_object
5687 {
5688   int element_em;
5689   boolean is_rnd_to_em_mapping;         // unique mapping EM <-> RND
5690   boolean is_backside;                  // backside of moving element
5691
5692   int element_rnd;
5693   int action;
5694   int direction;
5695 }
5696 em_object_mapping_list[] =
5697 {
5698   {
5699     Xblank,                             TRUE,   FALSE,
5700     EL_EMPTY,                           -1, -1
5701   },
5702   {
5703     Yacid_splash_eB,                    FALSE,  FALSE,
5704     EL_ACID_SPLASH_RIGHT,               -1, -1
5705   },
5706   {
5707     Yacid_splash_wB,                    FALSE,  FALSE,
5708     EL_ACID_SPLASH_LEFT,                -1, -1
5709   },
5710
5711 #ifdef EM_ENGINE_BAD_ROLL
5712   {
5713     Xstone_force_e,                     FALSE,  FALSE,
5714     EL_ROCK,                            -1, MV_BIT_RIGHT
5715   },
5716   {
5717     Xstone_force_w,                     FALSE,  FALSE,
5718     EL_ROCK,                            -1, MV_BIT_LEFT
5719   },
5720   {
5721     Xnut_force_e,                       FALSE,  FALSE,
5722     EL_NUT,                             -1, MV_BIT_RIGHT
5723   },
5724   {
5725     Xnut_force_w,                       FALSE,  FALSE,
5726     EL_NUT,                             -1, MV_BIT_LEFT
5727   },
5728   {
5729     Xspring_force_e,                    FALSE,  FALSE,
5730     EL_SPRING,                          -1, MV_BIT_RIGHT
5731   },
5732   {
5733     Xspring_force_w,                    FALSE,  FALSE,
5734     EL_SPRING,                          -1, MV_BIT_LEFT
5735   },
5736   {
5737     Xemerald_force_e,                   FALSE,  FALSE,
5738     EL_EMERALD,                         -1, MV_BIT_RIGHT
5739   },
5740   {
5741     Xemerald_force_w,                   FALSE,  FALSE,
5742     EL_EMERALD,                         -1, MV_BIT_LEFT
5743   },
5744   {
5745     Xdiamond_force_e,                   FALSE,  FALSE,
5746     EL_DIAMOND,                         -1, MV_BIT_RIGHT
5747   },
5748   {
5749     Xdiamond_force_w,                   FALSE,  FALSE,
5750     EL_DIAMOND,                         -1, MV_BIT_LEFT
5751   },
5752   {
5753     Xbomb_force_e,                      FALSE,  FALSE,
5754     EL_BOMB,                            -1, MV_BIT_RIGHT
5755   },
5756   {
5757     Xbomb_force_w,                      FALSE,  FALSE,
5758     EL_BOMB,                            -1, MV_BIT_LEFT
5759   },
5760 #endif  // EM_ENGINE_BAD_ROLL
5761
5762   {
5763     Xstone,                             TRUE,   FALSE,
5764     EL_ROCK,                            -1, -1
5765   },
5766   {
5767     Xstone_pause,                       FALSE,  FALSE,
5768     EL_ROCK,                            -1, -1
5769   },
5770   {
5771     Xstone_fall,                        FALSE,  FALSE,
5772     EL_ROCK,                            -1, -1
5773   },
5774   {
5775     Ystone_s,                           FALSE,  FALSE,
5776     EL_ROCK,                            ACTION_FALLING, -1
5777   },
5778   {
5779     Ystone_sB,                          FALSE,  TRUE,
5780     EL_ROCK,                            ACTION_FALLING, -1
5781   },
5782   {
5783     Ystone_e,                           FALSE,  FALSE,
5784     EL_ROCK,                            ACTION_MOVING, MV_BIT_RIGHT
5785   },
5786   {
5787     Ystone_eB,                          FALSE,  TRUE,
5788     EL_ROCK,                            ACTION_MOVING, MV_BIT_RIGHT
5789   },
5790   {
5791     Ystone_w,                           FALSE,  FALSE,
5792     EL_ROCK,                            ACTION_MOVING, MV_BIT_LEFT
5793   },
5794   {
5795     Ystone_wB,                          FALSE,  TRUE,
5796     EL_ROCK,                            ACTION_MOVING, MV_BIT_LEFT
5797   },
5798   {
5799     Xnut,                               TRUE,   FALSE,
5800     EL_NUT,                             -1, -1
5801   },
5802   {
5803     Xnut_pause,                         FALSE,  FALSE,
5804     EL_NUT,                             -1, -1
5805   },
5806   {
5807     Xnut_fall,                          FALSE,  FALSE,
5808     EL_NUT,                             -1, -1
5809   },
5810   {
5811     Ynut_s,                             FALSE,  FALSE,
5812     EL_NUT,                             ACTION_FALLING, -1
5813   },
5814   {
5815     Ynut_sB,                            FALSE,  TRUE,
5816     EL_NUT,                             ACTION_FALLING, -1
5817   },
5818   {
5819     Ynut_e,                             FALSE,  FALSE,
5820     EL_NUT,                             ACTION_MOVING, MV_BIT_RIGHT
5821   },
5822   {
5823     Ynut_eB,                            FALSE,  TRUE,
5824     EL_NUT,                             ACTION_MOVING, MV_BIT_RIGHT
5825   },
5826   {
5827     Ynut_w,                             FALSE,  FALSE,
5828     EL_NUT,                             ACTION_MOVING, MV_BIT_LEFT
5829   },
5830   {
5831     Ynut_wB,                            FALSE,  TRUE,
5832     EL_NUT,                             ACTION_MOVING, MV_BIT_LEFT
5833   },
5834   {
5835     Xbug_n,                             TRUE,   FALSE,
5836     EL_BUG_UP,                          -1, -1
5837   },
5838   {
5839     Xbug_e,                             TRUE,   FALSE,
5840     EL_BUG_RIGHT,                       -1, -1
5841   },
5842   {
5843     Xbug_s,                             TRUE,   FALSE,
5844     EL_BUG_DOWN,                        -1, -1
5845   },
5846   {
5847     Xbug_w,                             TRUE,   FALSE,
5848     EL_BUG_LEFT,                        -1, -1
5849   },
5850   {
5851     Xbug_gon,                           FALSE,  FALSE,
5852     EL_BUG_UP,                          -1, -1
5853   },
5854   {
5855     Xbug_goe,                           FALSE,  FALSE,
5856     EL_BUG_RIGHT,                       -1, -1
5857   },
5858   {
5859     Xbug_gos,                           FALSE,  FALSE,
5860     EL_BUG_DOWN,                        -1, -1
5861   },
5862   {
5863     Xbug_gow,                           FALSE,  FALSE,
5864     EL_BUG_LEFT,                        -1, -1
5865   },
5866   {
5867     Ybug_n,                             FALSE,  FALSE,
5868     EL_BUG,                             ACTION_MOVING, MV_BIT_UP
5869   },
5870   {
5871     Ybug_nB,                            FALSE,  TRUE,
5872     EL_BUG,                             ACTION_MOVING, MV_BIT_UP
5873   },
5874   {
5875     Ybug_e,                             FALSE,  FALSE,
5876     EL_BUG,                             ACTION_MOVING, MV_BIT_RIGHT
5877   },
5878   {
5879     Ybug_eB,                            FALSE,  TRUE,
5880     EL_BUG,                             ACTION_MOVING, MV_BIT_RIGHT
5881   },
5882   {
5883     Ybug_s,                             FALSE,  FALSE,
5884     EL_BUG,                             ACTION_MOVING, MV_BIT_DOWN
5885   },
5886   {
5887     Ybug_sB,                            FALSE,  TRUE,
5888     EL_BUG,                             ACTION_MOVING, MV_BIT_DOWN
5889   },
5890   {
5891     Ybug_w,                             FALSE,  FALSE,
5892     EL_BUG,                             ACTION_MOVING, MV_BIT_LEFT
5893   },
5894   {
5895     Ybug_wB,                            FALSE,  TRUE,
5896     EL_BUG,                             ACTION_MOVING, MV_BIT_LEFT
5897   },
5898   {
5899     Ybug_w_n,                           FALSE,  FALSE,
5900     EL_BUG,                             ACTION_TURNING_FROM_LEFT, MV_BIT_UP
5901   },
5902   {
5903     Ybug_n_e,                           FALSE,  FALSE,
5904     EL_BUG,                             ACTION_TURNING_FROM_UP, MV_BIT_RIGHT
5905   },
5906   {
5907     Ybug_e_s,                           FALSE,  FALSE,
5908     EL_BUG,                             ACTION_TURNING_FROM_RIGHT, MV_BIT_DOWN
5909   },
5910   {
5911     Ybug_s_w,                           FALSE,  FALSE,
5912     EL_BUG,                             ACTION_TURNING_FROM_DOWN, MV_BIT_LEFT
5913   },
5914   {
5915     Ybug_e_n,                           FALSE,  FALSE,
5916     EL_BUG,                             ACTION_TURNING_FROM_RIGHT, MV_BIT_UP
5917   },
5918   {
5919     Ybug_s_e,                           FALSE,  FALSE,
5920     EL_BUG,                             ACTION_TURNING_FROM_DOWN, MV_BIT_RIGHT
5921   },
5922   {
5923     Ybug_w_s,                           FALSE,  FALSE,
5924     EL_BUG,                             ACTION_TURNING_FROM_LEFT, MV_BIT_DOWN
5925   },
5926   {
5927     Ybug_n_w,                           FALSE,  FALSE,
5928     EL_BUG,                             ACTION_TURNING_FROM_UP, MV_BIT_LEFT
5929   },
5930   {
5931     Ybug_stone,                         FALSE,  FALSE,
5932     EL_BUG,                             ACTION_SMASHED_BY_ROCK, -1
5933   },
5934   {
5935     Ybug_spring,                        FALSE,  FALSE,
5936     EL_BUG,                             ACTION_SMASHED_BY_SPRING, -1
5937   },
5938   {
5939     Xtank_n,                            TRUE,   FALSE,
5940     EL_SPACESHIP_UP,                    -1, -1
5941   },
5942   {
5943     Xtank_e,                            TRUE,   FALSE,
5944     EL_SPACESHIP_RIGHT,                 -1, -1
5945   },
5946   {
5947     Xtank_s,                            TRUE,   FALSE,
5948     EL_SPACESHIP_DOWN,                  -1, -1
5949   },
5950   {
5951     Xtank_w,                            TRUE,   FALSE,
5952     EL_SPACESHIP_LEFT,                  -1, -1
5953   },
5954   {
5955     Xtank_gon,                          FALSE,  FALSE,
5956     EL_SPACESHIP_UP,                    -1, -1
5957   },
5958   {
5959     Xtank_goe,                          FALSE,  FALSE,
5960     EL_SPACESHIP_RIGHT,                 -1, -1
5961   },
5962   {
5963     Xtank_gos,                          FALSE,  FALSE,
5964     EL_SPACESHIP_DOWN,                  -1, -1
5965   },
5966   {
5967     Xtank_gow,                          FALSE,  FALSE,
5968     EL_SPACESHIP_LEFT,                  -1, -1
5969   },
5970   {
5971     Ytank_n,                            FALSE,  FALSE,
5972     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_UP
5973   },
5974   {
5975     Ytank_nB,                           FALSE,  TRUE,
5976     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_UP
5977   },
5978   {
5979     Ytank_e,                            FALSE,  FALSE,
5980     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_RIGHT
5981   },
5982   {
5983     Ytank_eB,                           FALSE,  TRUE,
5984     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_RIGHT
5985   },
5986   {
5987     Ytank_s,                            FALSE,  FALSE,
5988     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_DOWN
5989   },
5990   {
5991     Ytank_sB,                           FALSE,  TRUE,
5992     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_DOWN
5993   },
5994   {
5995     Ytank_w,                            FALSE,  FALSE,
5996     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_LEFT
5997   },
5998   {
5999     Ytank_wB,                           FALSE,  TRUE,
6000     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_LEFT
6001   },
6002   {
6003     Ytank_w_n,                          FALSE,  FALSE,
6004     EL_SPACESHIP,                       ACTION_TURNING_FROM_LEFT, MV_BIT_UP
6005   },
6006   {
6007     Ytank_n_e,                          FALSE,  FALSE,
6008     EL_SPACESHIP,                       ACTION_TURNING_FROM_UP, MV_BIT_RIGHT
6009   },
6010   {
6011     Ytank_e_s,                          FALSE,  FALSE,
6012     EL_SPACESHIP,                       ACTION_TURNING_FROM_RIGHT, MV_BIT_DOWN
6013   },
6014   {
6015     Ytank_s_w,                          FALSE,  FALSE,
6016     EL_SPACESHIP,                       ACTION_TURNING_FROM_DOWN, MV_BIT_LEFT
6017   },
6018   {
6019     Ytank_e_n,                          FALSE,  FALSE,
6020     EL_SPACESHIP,                       ACTION_TURNING_FROM_RIGHT, MV_BIT_UP
6021   },
6022   {
6023     Ytank_s_e,                          FALSE,  FALSE,
6024     EL_SPACESHIP,                       ACTION_TURNING_FROM_DOWN, MV_BIT_RIGHT
6025   },
6026   {
6027     Ytank_w_s,                          FALSE,  FALSE,
6028     EL_SPACESHIP,                       ACTION_TURNING_FROM_LEFT, MV_BIT_DOWN
6029   },
6030   {
6031     Ytank_n_w,                          FALSE,  FALSE,
6032     EL_SPACESHIP,                       ACTION_TURNING_FROM_UP, MV_BIT_LEFT
6033   },
6034   {
6035     Ytank_stone,                        FALSE,  FALSE,
6036     EL_SPACESHIP,                       ACTION_SMASHED_BY_ROCK, -1
6037   },
6038   {
6039     Ytank_spring,                       FALSE,  FALSE,
6040     EL_SPACESHIP,                       ACTION_SMASHED_BY_SPRING, -1
6041   },
6042   {
6043     Xandroid,                           TRUE,   FALSE,
6044     EL_EMC_ANDROID,                     ACTION_ACTIVE, -1
6045   },
6046   {
6047     Xandroid_1_n,                       FALSE,  FALSE,
6048     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_UP
6049   },
6050   {
6051     Xandroid_2_n,                       FALSE,  FALSE,
6052     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_UP
6053   },
6054   {
6055     Xandroid_1_e,                       FALSE,  FALSE,
6056     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_RIGHT
6057   },
6058   {
6059     Xandroid_2_e,                       FALSE,  FALSE,
6060     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_RIGHT
6061   },
6062   {
6063     Xandroid_1_w,                       FALSE,  FALSE,
6064     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_LEFT
6065   },
6066   {
6067     Xandroid_2_w,                       FALSE,  FALSE,
6068     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_LEFT
6069   },
6070   {
6071     Xandroid_1_s,                       FALSE,  FALSE,
6072     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_DOWN
6073   },
6074   {
6075     Xandroid_2_s,                       FALSE,  FALSE,
6076     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_DOWN
6077   },
6078   {
6079     Yandroid_n,                         FALSE,  FALSE,
6080     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_UP
6081   },
6082   {
6083     Yandroid_nB,                        FALSE,  TRUE,
6084     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_UP
6085   },
6086   {
6087     Yandroid_ne,                        FALSE,  FALSE,
6088     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_UPRIGHT
6089   },
6090   {
6091     Yandroid_neB,                       FALSE,  TRUE,
6092     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_UPRIGHT
6093   },
6094   {
6095     Yandroid_e,                         FALSE,  FALSE,
6096     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_RIGHT
6097   },
6098   {
6099     Yandroid_eB,                        FALSE,  TRUE,
6100     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_RIGHT
6101   },
6102   {
6103     Yandroid_se,                        FALSE,  FALSE,
6104     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_DOWNRIGHT
6105   },
6106   {
6107     Yandroid_seB,                       FALSE,  TRUE,
6108     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_DOWNRIGHT
6109   },
6110   {
6111     Yandroid_s,                         FALSE,  FALSE,
6112     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_DOWN
6113   },
6114   {
6115     Yandroid_sB,                        FALSE,  TRUE,
6116     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_DOWN
6117   },
6118   {
6119     Yandroid_sw,                        FALSE,  FALSE,
6120     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_DOWNLEFT
6121   },
6122   {
6123     Yandroid_swB,                       FALSE,  TRUE,
6124     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_DOWNLEFT
6125   },
6126   {
6127     Yandroid_w,                         FALSE,  FALSE,
6128     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_LEFT
6129   },
6130   {
6131     Yandroid_wB,                        FALSE,  TRUE,
6132     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_LEFT
6133   },
6134   {
6135     Yandroid_nw,                        FALSE,  FALSE,
6136     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_UPLEFT
6137   },
6138   {
6139     Yandroid_nwB,                       FALSE,  TRUE,
6140     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_UPLEFT
6141   },
6142   {
6143     Xspring,                            TRUE,   FALSE,
6144     EL_SPRING,                          -1, -1
6145   },
6146   {
6147     Xspring_pause,                      FALSE,  FALSE,
6148     EL_SPRING,                          -1, -1
6149   },
6150   {
6151     Xspring_e,                          FALSE,  FALSE,
6152     EL_SPRING,                          -1, -1
6153   },
6154   {
6155     Xspring_w,                          FALSE,  FALSE,
6156     EL_SPRING,                          -1, -1
6157   },
6158   {
6159     Xspring_fall,                       FALSE,  FALSE,
6160     EL_SPRING,                          -1, -1
6161   },
6162   {
6163     Yspring_s,                          FALSE,  FALSE,
6164     EL_SPRING,                          ACTION_FALLING, -1
6165   },
6166   {
6167     Yspring_sB,                         FALSE,  TRUE,
6168     EL_SPRING,                          ACTION_FALLING, -1
6169   },
6170   {
6171     Yspring_e,                          FALSE,  FALSE,
6172     EL_SPRING,                          ACTION_MOVING, MV_BIT_RIGHT
6173   },
6174   {
6175     Yspring_eB,                         FALSE,  TRUE,
6176     EL_SPRING,                          ACTION_MOVING, MV_BIT_RIGHT
6177   },
6178   {
6179     Yspring_w,                          FALSE,  FALSE,
6180     EL_SPRING,                          ACTION_MOVING, MV_BIT_LEFT
6181   },
6182   {
6183     Yspring_wB,                         FALSE,  TRUE,
6184     EL_SPRING,                          ACTION_MOVING, MV_BIT_LEFT
6185   },
6186   {
6187     Yspring_kill_e,                     FALSE,  FALSE,
6188     EL_SPRING,                          ACTION_EATING, MV_BIT_RIGHT
6189   },
6190   {
6191     Yspring_kill_eB,                    FALSE,  TRUE,
6192     EL_SPRING,                          ACTION_EATING, MV_BIT_RIGHT
6193   },
6194   {
6195     Yspring_kill_w,                     FALSE,  FALSE,
6196     EL_SPRING,                          ACTION_EATING, MV_BIT_LEFT
6197   },
6198   {
6199     Yspring_kill_wB,                    FALSE,  TRUE,
6200     EL_SPRING,                          ACTION_EATING, MV_BIT_LEFT
6201   },
6202   {
6203     Xeater_n,                           TRUE,   FALSE,
6204     EL_YAMYAM_UP,                       -1, -1
6205   },
6206   {
6207     Xeater_e,                           TRUE,   FALSE,
6208     EL_YAMYAM_RIGHT,                    -1, -1
6209   },
6210   {
6211     Xeater_w,                           TRUE,   FALSE,
6212     EL_YAMYAM_LEFT,                     -1, -1
6213   },
6214   {
6215     Xeater_s,                           TRUE,   FALSE,
6216     EL_YAMYAM_DOWN,                     -1, -1
6217   },
6218   {
6219     Yeater_n,                           FALSE,  FALSE,
6220     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_UP
6221   },
6222   {
6223     Yeater_nB,                          FALSE,  TRUE,
6224     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_UP
6225   },
6226   {
6227     Yeater_e,                           FALSE,  FALSE,
6228     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_RIGHT
6229   },
6230   {
6231     Yeater_eB,                          FALSE,  TRUE,
6232     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_RIGHT
6233   },
6234   {
6235     Yeater_s,                           FALSE,  FALSE,
6236     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_DOWN
6237   },
6238   {
6239     Yeater_sB,                          FALSE,  TRUE,
6240     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_DOWN
6241   },
6242   {
6243     Yeater_w,                           FALSE,  FALSE,
6244     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_LEFT
6245   },
6246   {
6247     Yeater_wB,                          FALSE,  TRUE,
6248     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_LEFT
6249   },
6250   {
6251     Yeater_stone,                       FALSE,  FALSE,
6252     EL_YAMYAM,                          ACTION_SMASHED_BY_ROCK, -1
6253   },
6254   {
6255     Yeater_spring,                      FALSE,  FALSE,
6256     EL_YAMYAM,                          ACTION_SMASHED_BY_SPRING, -1
6257   },
6258   {
6259     Xalien,                             TRUE,   FALSE,
6260     EL_ROBOT,                           -1, -1
6261   },
6262   {
6263     Xalien_pause,                       FALSE,  FALSE,
6264     EL_ROBOT,                           -1, -1
6265   },
6266   {
6267     Yalien_n,                           FALSE,  FALSE,
6268     EL_ROBOT,                           ACTION_MOVING, MV_BIT_UP
6269   },
6270   {
6271     Yalien_nB,                          FALSE,  TRUE,
6272     EL_ROBOT,                           ACTION_MOVING, MV_BIT_UP
6273   },
6274   {
6275     Yalien_e,                           FALSE,  FALSE,
6276     EL_ROBOT,                           ACTION_MOVING, MV_BIT_RIGHT
6277   },
6278   {
6279     Yalien_eB,                          FALSE,  TRUE,
6280     EL_ROBOT,                           ACTION_MOVING, MV_BIT_RIGHT
6281   },
6282   {
6283     Yalien_s,                           FALSE,  FALSE,
6284     EL_ROBOT,                           ACTION_MOVING, MV_BIT_DOWN
6285   },
6286   {
6287     Yalien_sB,                          FALSE,  TRUE,
6288     EL_ROBOT,                           ACTION_MOVING, MV_BIT_DOWN
6289   },
6290   {
6291     Yalien_w,                           FALSE,  FALSE,
6292     EL_ROBOT,                           ACTION_MOVING, MV_BIT_LEFT
6293   },
6294   {
6295     Yalien_wB,                          FALSE,  TRUE,
6296     EL_ROBOT,                           ACTION_MOVING, MV_BIT_LEFT
6297   },
6298   {
6299     Yalien_stone,                       FALSE,  FALSE,
6300     EL_ROBOT,                           ACTION_SMASHED_BY_ROCK, -1
6301   },
6302   {
6303     Yalien_spring,                      FALSE,  FALSE,
6304     EL_ROBOT,                           ACTION_SMASHED_BY_SPRING, -1
6305   },
6306   {
6307     Xemerald,                           TRUE,   FALSE,
6308     EL_EMERALD,                         -1, -1
6309   },
6310   {
6311     Xemerald_pause,                     FALSE,  FALSE,
6312     EL_EMERALD,                         -1, -1
6313   },
6314   {
6315     Xemerald_fall,                      FALSE,  FALSE,
6316     EL_EMERALD,                         -1, -1
6317   },
6318   {
6319     Xemerald_shine,                     FALSE,  FALSE,
6320     EL_EMERALD,                         ACTION_TWINKLING, -1
6321   },
6322   {
6323     Yemerald_s,                         FALSE,  FALSE,
6324     EL_EMERALD,                         ACTION_FALLING, -1
6325   },
6326   {
6327     Yemerald_sB,                        FALSE,  TRUE,
6328     EL_EMERALD,                         ACTION_FALLING, -1
6329   },
6330   {
6331     Yemerald_e,                         FALSE,  FALSE,
6332     EL_EMERALD,                         ACTION_MOVING, MV_BIT_RIGHT
6333   },
6334   {
6335     Yemerald_eB,                        FALSE,  TRUE,
6336     EL_EMERALD,                         ACTION_MOVING, MV_BIT_RIGHT
6337   },
6338   {
6339     Yemerald_w,                         FALSE,  FALSE,
6340     EL_EMERALD,                         ACTION_MOVING, MV_BIT_LEFT
6341   },
6342   {
6343     Yemerald_wB,                        FALSE,  TRUE,
6344     EL_EMERALD,                         ACTION_MOVING, MV_BIT_LEFT
6345   },
6346   {
6347     Yemerald_eat,                       FALSE,  FALSE,
6348     EL_EMERALD,                         ACTION_COLLECTING, -1
6349   },
6350   {
6351     Yemerald_stone,                     FALSE,  FALSE,
6352     EL_NUT,                             ACTION_BREAKING, -1
6353   },
6354   {
6355     Xdiamond,                           TRUE,   FALSE,
6356     EL_DIAMOND,                         -1, -1
6357   },
6358   {
6359     Xdiamond_pause,                     FALSE,  FALSE,
6360     EL_DIAMOND,                         -1, -1
6361   },
6362   {
6363     Xdiamond_fall,                      FALSE,  FALSE,
6364     EL_DIAMOND,                         -1, -1
6365   },
6366   {
6367     Xdiamond_shine,                     FALSE,  FALSE,
6368     EL_DIAMOND,                         ACTION_TWINKLING, -1
6369   },
6370   {
6371     Ydiamond_s,                         FALSE,  FALSE,
6372     EL_DIAMOND,                         ACTION_FALLING, -1
6373   },
6374   {
6375     Ydiamond_sB,                        FALSE,  TRUE,
6376     EL_DIAMOND,                         ACTION_FALLING, -1
6377   },
6378   {
6379     Ydiamond_e,                         FALSE,  FALSE,
6380     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_RIGHT
6381   },
6382   {
6383     Ydiamond_eB,                        FALSE,  TRUE,
6384     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_RIGHT
6385   },
6386   {
6387     Ydiamond_w,                         FALSE,  FALSE,
6388     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_LEFT
6389   },
6390   {
6391     Ydiamond_wB,                        FALSE,  TRUE,
6392     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_LEFT
6393   },
6394   {
6395     Ydiamond_eat,                       FALSE,  FALSE,
6396     EL_DIAMOND,                         ACTION_COLLECTING, -1
6397   },
6398   {
6399     Ydiamond_stone,                     FALSE,  FALSE,
6400     EL_DIAMOND,                         ACTION_SMASHED_BY_ROCK, -1
6401   },
6402   {
6403     Xdrip_fall,                         TRUE,   FALSE,
6404     EL_AMOEBA_DROP,                     -1, -1
6405   },
6406   {
6407     Xdrip_stretch,                      FALSE,  FALSE,
6408     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6409   },
6410   {
6411     Xdrip_stretchB,                     FALSE,  TRUE,
6412     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6413   },
6414   {
6415     Xdrip_eat,                          FALSE,  FALSE,
6416     EL_AMOEBA_DROP,                     ACTION_GROWING, -1
6417   },
6418   {
6419     Ydrip_s1,                           FALSE,  FALSE,
6420     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6421   },
6422   {
6423     Ydrip_s1B,                          FALSE,  TRUE,
6424     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6425   },
6426   {
6427     Ydrip_s2,                           FALSE,  FALSE,
6428     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6429   },
6430   {
6431     Ydrip_s2B,                          FALSE,  TRUE,
6432     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
6433   },
6434   {
6435     Xbomb,                              TRUE,   FALSE,
6436     EL_BOMB,                            -1, -1
6437   },
6438   {
6439     Xbomb_pause,                        FALSE,  FALSE,
6440     EL_BOMB,                            -1, -1
6441   },
6442   {
6443     Xbomb_fall,                         FALSE,  FALSE,
6444     EL_BOMB,                            -1, -1
6445   },
6446   {
6447     Ybomb_s,                            FALSE,  FALSE,
6448     EL_BOMB,                            ACTION_FALLING, -1
6449   },
6450   {
6451     Ybomb_sB,                           FALSE,  TRUE,
6452     EL_BOMB,                            ACTION_FALLING, -1
6453   },
6454   {
6455     Ybomb_e,                            FALSE,  FALSE,
6456     EL_BOMB,                            ACTION_MOVING, MV_BIT_RIGHT
6457   },
6458   {
6459     Ybomb_eB,                           FALSE,  TRUE,
6460     EL_BOMB,                            ACTION_MOVING, MV_BIT_RIGHT
6461   },
6462   {
6463     Ybomb_w,                            FALSE,  FALSE,
6464     EL_BOMB,                            ACTION_MOVING, MV_BIT_LEFT
6465   },
6466   {
6467     Ybomb_wB,                           FALSE,  TRUE,
6468     EL_BOMB,                            ACTION_MOVING, MV_BIT_LEFT
6469   },
6470   {
6471     Ybomb_eat,                          FALSE,  FALSE,
6472     EL_BOMB,                            ACTION_ACTIVATING, -1
6473   },
6474   {
6475     Xballoon,                           TRUE,   FALSE,
6476     EL_BALLOON,                         -1, -1
6477   },
6478   {
6479     Yballoon_n,                         FALSE,  FALSE,
6480     EL_BALLOON,                         ACTION_MOVING, MV_BIT_UP
6481   },
6482   {
6483     Yballoon_nB,                        FALSE,  TRUE,
6484     EL_BALLOON,                         ACTION_MOVING, MV_BIT_UP
6485   },
6486   {
6487     Yballoon_e,                         FALSE,  FALSE,
6488     EL_BALLOON,                         ACTION_MOVING, MV_BIT_RIGHT
6489   },
6490   {
6491     Yballoon_eB,                        FALSE,  TRUE,
6492     EL_BALLOON,                         ACTION_MOVING, MV_BIT_RIGHT
6493   },
6494   {
6495     Yballoon_s,                         FALSE,  FALSE,
6496     EL_BALLOON,                         ACTION_MOVING, MV_BIT_DOWN
6497   },
6498   {
6499     Yballoon_sB,                        FALSE,  TRUE,
6500     EL_BALLOON,                         ACTION_MOVING, MV_BIT_DOWN
6501   },
6502   {
6503     Yballoon_w,                         FALSE,  FALSE,
6504     EL_BALLOON,                         ACTION_MOVING, MV_BIT_LEFT
6505   },
6506   {
6507     Yballoon_wB,                        FALSE,  TRUE,
6508     EL_BALLOON,                         ACTION_MOVING, MV_BIT_LEFT
6509   },
6510   {
6511     Xgrass,                             TRUE,   FALSE,
6512     EL_EMC_GRASS,                       -1, -1
6513   },
6514   {
6515     Ygrass_nB,                          FALSE,  FALSE,
6516     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_UP
6517   },
6518   {
6519     Ygrass_eB,                          FALSE,  FALSE,
6520     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_RIGHT
6521   },
6522   {
6523     Ygrass_sB,                          FALSE,  FALSE,
6524     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_DOWN
6525   },
6526   {
6527     Ygrass_wB,                          FALSE,  FALSE,
6528     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_LEFT
6529   },
6530   {
6531     Xdirt,                              TRUE,   FALSE,
6532     EL_SAND,                            -1, -1
6533   },
6534   {
6535     Ydirt_nB,                           FALSE,  FALSE,
6536     EL_SAND,                            ACTION_DIGGING, MV_BIT_UP
6537   },
6538   {
6539     Ydirt_eB,                           FALSE,  FALSE,
6540     EL_SAND,                            ACTION_DIGGING, MV_BIT_RIGHT
6541   },
6542   {
6543     Ydirt_sB,                           FALSE,  FALSE,
6544     EL_SAND,                            ACTION_DIGGING, MV_BIT_DOWN
6545   },
6546   {
6547     Ydirt_wB,                           FALSE,  FALSE,
6548     EL_SAND,                            ACTION_DIGGING, MV_BIT_LEFT
6549   },
6550   {
6551     Xacid_ne,                           TRUE,   FALSE,
6552     EL_ACID_POOL_TOPRIGHT,              -1, -1
6553   },
6554   {
6555     Xacid_se,                           TRUE,   FALSE,
6556     EL_ACID_POOL_BOTTOMRIGHT,           -1, -1
6557   },
6558   {
6559     Xacid_s,                            TRUE,   FALSE,
6560     EL_ACID_POOL_BOTTOM,                -1, -1
6561   },
6562   {
6563     Xacid_sw,                           TRUE,   FALSE,
6564     EL_ACID_POOL_BOTTOMLEFT,            -1, -1
6565   },
6566   {
6567     Xacid_nw,                           TRUE,   FALSE,
6568     EL_ACID_POOL_TOPLEFT,               -1, -1
6569   },
6570   {
6571     Xacid_1,                            TRUE,   FALSE,
6572     EL_ACID,                            -1, -1
6573   },
6574   {
6575     Xacid_2,                            FALSE,  FALSE,
6576     EL_ACID,                            -1, -1
6577   },
6578   {
6579     Xacid_3,                            FALSE,  FALSE,
6580     EL_ACID,                            -1, -1
6581   },
6582   {
6583     Xacid_4,                            FALSE,  FALSE,
6584     EL_ACID,                            -1, -1
6585   },
6586   {
6587     Xacid_5,                            FALSE,  FALSE,
6588     EL_ACID,                            -1, -1
6589   },
6590   {
6591     Xacid_6,                            FALSE,  FALSE,
6592     EL_ACID,                            -1, -1
6593   },
6594   {
6595     Xacid_7,                            FALSE,  FALSE,
6596     EL_ACID,                            -1, -1
6597   },
6598   {
6599     Xacid_8,                            FALSE,  FALSE,
6600     EL_ACID,                            -1, -1
6601   },
6602   {
6603     Xball_1,                            TRUE,   FALSE,
6604     EL_EMC_MAGIC_BALL,                  -1, -1
6605   },
6606   {
6607     Xball_1B,                           FALSE,  FALSE,
6608     EL_EMC_MAGIC_BALL,                  ACTION_ACTIVE, -1
6609   },
6610   {
6611     Xball_2,                            FALSE,  FALSE,
6612     EL_EMC_MAGIC_BALL,                  ACTION_ACTIVE, -1
6613   },
6614   {
6615     Xball_2B,                           FALSE,  FALSE,
6616     EL_EMC_MAGIC_BALL,                  ACTION_ACTIVE, -1
6617   },
6618   {
6619     Yball_eat,                          FALSE,  FALSE,
6620     EL_EMC_MAGIC_BALL,                  ACTION_DROPPING, -1
6621   },
6622   {
6623     Ykey_1_eat,                         FALSE,  FALSE,
6624     EL_EM_KEY_1,                        ACTION_COLLECTING, -1
6625   },
6626   {
6627     Ykey_2_eat,                         FALSE,  FALSE,
6628     EL_EM_KEY_2,                        ACTION_COLLECTING, -1
6629   },
6630   {
6631     Ykey_3_eat,                         FALSE,  FALSE,
6632     EL_EM_KEY_3,                        ACTION_COLLECTING, -1
6633   },
6634   {
6635     Ykey_4_eat,                         FALSE,  FALSE,
6636     EL_EM_KEY_4,                        ACTION_COLLECTING, -1
6637   },
6638   {
6639     Ykey_5_eat,                         FALSE,  FALSE,
6640     EL_EMC_KEY_5,                       ACTION_COLLECTING, -1
6641   },
6642   {
6643     Ykey_6_eat,                         FALSE,  FALSE,
6644     EL_EMC_KEY_6,                       ACTION_COLLECTING, -1
6645   },
6646   {
6647     Ykey_7_eat,                         FALSE,  FALSE,
6648     EL_EMC_KEY_7,                       ACTION_COLLECTING, -1
6649   },
6650   {
6651     Ykey_8_eat,                         FALSE,  FALSE,
6652     EL_EMC_KEY_8,                       ACTION_COLLECTING, -1
6653   },
6654   {
6655     Ylenses_eat,                        FALSE,  FALSE,
6656     EL_EMC_LENSES,                      ACTION_COLLECTING, -1
6657   },
6658   {
6659     Ymagnify_eat,                       FALSE,  FALSE,
6660     EL_EMC_MAGNIFIER,                   ACTION_COLLECTING, -1
6661   },
6662   {
6663     Ygrass_eat,                         FALSE,  FALSE,
6664     EL_EMC_GRASS,                       ACTION_SNAPPING, -1
6665   },
6666   {
6667     Ydirt_eat,                          FALSE,  FALSE,
6668     EL_SAND,                            ACTION_SNAPPING, -1
6669   },
6670   {
6671     Xgrow_ns,                           TRUE,   FALSE,
6672     EL_EXPANDABLE_WALL_VERTICAL,        -1, -1
6673   },
6674   {
6675     Ygrow_ns_eat,                       FALSE,  FALSE,
6676     EL_EXPANDABLE_WALL_VERTICAL,        ACTION_GROWING, -1
6677   },
6678   {
6679     Xgrow_ew,                           TRUE,   FALSE,
6680     EL_EXPANDABLE_WALL_HORIZONTAL,      -1, -1
6681   },
6682   {
6683     Ygrow_ew_eat,                       FALSE,  FALSE,
6684     EL_EXPANDABLE_WALL_HORIZONTAL,      ACTION_GROWING, -1
6685   },
6686   {
6687     Xwonderwall,                        TRUE,   FALSE,
6688     EL_MAGIC_WALL,                      -1, -1
6689   },
6690   {
6691     XwonderwallB,                       FALSE,  FALSE,
6692     EL_MAGIC_WALL,                      ACTION_ACTIVE, -1
6693   },
6694   {
6695     Xamoeba_1,                          TRUE,   FALSE,
6696     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
6697   },
6698   {
6699     Xamoeba_2,                          FALSE,  FALSE,
6700     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
6701   },
6702   {
6703     Xamoeba_3,                          FALSE,  FALSE,
6704     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
6705   },
6706   {
6707     Xamoeba_4,                          FALSE,  FALSE,
6708     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
6709   },
6710   {
6711     Xamoeba_5,                          TRUE,   FALSE,
6712     EL_AMOEBA_WET,                      ACTION_OTHER, -1
6713   },
6714   {
6715     Xamoeba_6,                          FALSE,  FALSE,
6716     EL_AMOEBA_WET,                      ACTION_OTHER, -1
6717   },
6718   {
6719     Xamoeba_7,                          FALSE,  FALSE,
6720     EL_AMOEBA_WET,                      ACTION_OTHER, -1
6721   },
6722   {
6723     Xamoeba_8,                          FALSE,  FALSE,
6724     EL_AMOEBA_WET,                      ACTION_OTHER, -1
6725   },
6726   {
6727     Xdoor_1,                            TRUE,   FALSE,
6728     EL_EM_GATE_1,                       -1, -1
6729   },
6730   {
6731     Xdoor_2,                            TRUE,   FALSE,
6732     EL_EM_GATE_2,                       -1, -1
6733   },
6734   {
6735     Xdoor_3,                            TRUE,   FALSE,
6736     EL_EM_GATE_3,                       -1, -1
6737   },
6738   {
6739     Xdoor_4,                            TRUE,   FALSE,
6740     EL_EM_GATE_4,                       -1, -1
6741   },
6742   {
6743     Xdoor_5,                            TRUE,   FALSE,
6744     EL_EMC_GATE_5,                      -1, -1
6745   },
6746   {
6747     Xdoor_6,                            TRUE,   FALSE,
6748     EL_EMC_GATE_6,                      -1, -1
6749   },
6750   {
6751     Xdoor_7,                            TRUE,   FALSE,
6752     EL_EMC_GATE_7,                      -1, -1
6753   },
6754   {
6755     Xdoor_8,                            TRUE,   FALSE,
6756     EL_EMC_GATE_8,                      -1, -1
6757   },
6758   {
6759     Xkey_1,                             TRUE,   FALSE,
6760     EL_EM_KEY_1,                        -1, -1
6761   },
6762   {
6763     Xkey_2,                             TRUE,   FALSE,
6764     EL_EM_KEY_2,                        -1, -1
6765   },
6766   {
6767     Xkey_3,                             TRUE,   FALSE,
6768     EL_EM_KEY_3,                        -1, -1
6769   },
6770   {
6771     Xkey_4,                             TRUE,   FALSE,
6772     EL_EM_KEY_4,                        -1, -1
6773   },
6774   {
6775     Xkey_5,                             TRUE,   FALSE,
6776     EL_EMC_KEY_5,                       -1, -1
6777   },
6778   {
6779     Xkey_6,                             TRUE,   FALSE,
6780     EL_EMC_KEY_6,                       -1, -1
6781   },
6782   {
6783     Xkey_7,                             TRUE,   FALSE,
6784     EL_EMC_KEY_7,                       -1, -1
6785   },
6786   {
6787     Xkey_8,                             TRUE,   FALSE,
6788     EL_EMC_KEY_8,                       -1, -1
6789   },
6790   {
6791     Xwind_n,                            TRUE,   FALSE,
6792     EL_BALLOON_SWITCH_UP,               -1, -1
6793   },
6794   {
6795     Xwind_e,                            TRUE,   FALSE,
6796     EL_BALLOON_SWITCH_RIGHT,            -1, -1
6797   },
6798   {
6799     Xwind_s,                            TRUE,   FALSE,
6800     EL_BALLOON_SWITCH_DOWN,             -1, -1
6801   },
6802   {
6803     Xwind_w,                            TRUE,   FALSE,
6804     EL_BALLOON_SWITCH_LEFT,             -1, -1
6805   },
6806   {
6807     Xwind_nesw,                         TRUE,   FALSE,
6808     EL_BALLOON_SWITCH_ANY,              -1, -1
6809   },
6810   {
6811     Xwind_stop,                         TRUE,   FALSE,
6812     EL_BALLOON_SWITCH_NONE,             -1, -1
6813   },
6814   {
6815     Xexit,                              TRUE,   FALSE,
6816     EL_EM_EXIT_CLOSED,                  -1, -1
6817   },
6818   {
6819     Xexit_1,                            TRUE,   FALSE,
6820     EL_EM_EXIT_OPEN,                    -1, -1
6821   },
6822   {
6823     Xexit_2,                            FALSE,  FALSE,
6824     EL_EM_EXIT_OPEN,                    -1, -1
6825   },
6826   {
6827     Xexit_3,                            FALSE,  FALSE,
6828     EL_EM_EXIT_OPEN,                    -1, -1
6829   },
6830   {
6831     Xdynamite,                          TRUE,   FALSE,
6832     EL_EM_DYNAMITE,                     -1, -1
6833   },
6834   {
6835     Ydynamite_eat,                      FALSE,  FALSE,
6836     EL_EM_DYNAMITE,                     ACTION_COLLECTING, -1
6837   },
6838   {
6839     Xdynamite_1,                        TRUE,   FALSE,
6840     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6841   },
6842   {
6843     Xdynamite_2,                        FALSE,  FALSE,
6844     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6845   },
6846   {
6847     Xdynamite_3,                        FALSE,  FALSE,
6848     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6849   },
6850   {
6851     Xdynamite_4,                        FALSE,  FALSE,
6852     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6853   },
6854   {
6855     Xbumper,                            TRUE,   FALSE,
6856     EL_EMC_SPRING_BUMPER,               -1, -1
6857   },
6858   {
6859     XbumperB,                           FALSE,  FALSE,
6860     EL_EMC_SPRING_BUMPER,               ACTION_ACTIVE, -1
6861   },
6862   {
6863     Xwheel,                             TRUE,   FALSE,
6864     EL_ROBOT_WHEEL,                     -1, -1
6865   },
6866   {
6867     XwheelB,                            FALSE,  FALSE,
6868     EL_ROBOT_WHEEL,                     ACTION_ACTIVE, -1
6869   },
6870   {
6871     Xswitch,                            TRUE,   FALSE,
6872     EL_EMC_MAGIC_BALL_SWITCH,           -1, -1
6873   },
6874   {
6875     XswitchB,                           FALSE,  FALSE,
6876     EL_EMC_MAGIC_BALL_SWITCH,           ACTION_ACTIVE, -1
6877   },
6878   {
6879     Xsand,                              TRUE,   FALSE,
6880     EL_QUICKSAND_EMPTY,                 -1, -1
6881   },
6882   {
6883     Xsand_stone,                        TRUE,   FALSE,
6884     EL_QUICKSAND_FULL,                  -1, -1
6885   },
6886   {
6887     Xsand_stonein_1,                    FALSE,  TRUE,
6888     EL_ROCK,                            ACTION_FILLING, -1
6889   },
6890   {
6891     Xsand_stonein_2,                    FALSE,  TRUE,
6892     EL_ROCK,                            ACTION_FILLING, -1
6893   },
6894   {
6895     Xsand_stonein_3,                    FALSE,  TRUE,
6896     EL_ROCK,                            ACTION_FILLING, -1
6897   },
6898   {
6899     Xsand_stonein_4,                    FALSE,  TRUE,
6900     EL_ROCK,                            ACTION_FILLING, -1
6901   },
6902   {
6903     Xsand_stonesand_1,                  FALSE,  FALSE,
6904     EL_QUICKSAND_EMPTYING,              -1, -1
6905   },
6906   {
6907     Xsand_stonesand_2,                  FALSE,  FALSE,
6908     EL_QUICKSAND_EMPTYING,              -1, -1
6909   },
6910   {
6911     Xsand_stonesand_3,                  FALSE,  FALSE,
6912     EL_QUICKSAND_EMPTYING,              -1, -1
6913   },
6914   {
6915     Xsand_stonesand_4,                  FALSE,  FALSE,
6916     EL_QUICKSAND_EMPTYING,              -1, -1
6917   },
6918   {
6919     Xsand_stonesand_quickout_1,         FALSE,  FALSE,
6920     EL_QUICKSAND_EMPTYING,              -1, -1
6921   },
6922   {
6923     Xsand_stonesand_quickout_2,         FALSE,  FALSE,
6924     EL_QUICKSAND_EMPTYING,              -1, -1
6925   },
6926   {
6927     Xsand_stoneout_1,                   FALSE,  FALSE,
6928     EL_ROCK,                            ACTION_EMPTYING, -1
6929   },
6930   {
6931     Xsand_stoneout_2,                   FALSE,  FALSE,
6932     EL_ROCK,                            ACTION_EMPTYING, -1
6933   },
6934   {
6935     Xsand_sandstone_1,                  FALSE,  FALSE,
6936     EL_QUICKSAND_FILLING,               -1, -1
6937   },
6938   {
6939     Xsand_sandstone_2,                  FALSE,  FALSE,
6940     EL_QUICKSAND_FILLING,               -1, -1
6941   },
6942   {
6943     Xsand_sandstone_3,                  FALSE,  FALSE,
6944     EL_QUICKSAND_FILLING,               -1, -1
6945   },
6946   {
6947     Xsand_sandstone_4,                  FALSE,  FALSE,
6948     EL_QUICKSAND_FILLING,               -1, -1
6949   },
6950   {
6951     Xplant,                             TRUE,   FALSE,
6952     EL_EMC_PLANT,                       -1, -1
6953   },
6954   {
6955     Yplant,                             FALSE,  FALSE,
6956     EL_EMC_PLANT,                       -1, -1
6957   },
6958   {
6959     Xlenses,                            TRUE,   FALSE,
6960     EL_EMC_LENSES,                      -1, -1
6961   },
6962   {
6963     Xmagnify,                           TRUE,   FALSE,
6964     EL_EMC_MAGNIFIER,                   -1, -1
6965   },
6966   {
6967     Xdripper,                           TRUE,   FALSE,
6968     EL_EMC_DRIPPER,                     -1, -1
6969   },
6970   {
6971     XdripperB,                          FALSE,  FALSE,
6972     EL_EMC_DRIPPER,                     ACTION_ACTIVE, -1
6973   },
6974   {
6975     Xfake_blank,                        TRUE,   FALSE,
6976     EL_INVISIBLE_WALL,                  -1, -1
6977   },
6978   {
6979     Xfake_blankB,                       FALSE,  FALSE,
6980     EL_INVISIBLE_WALL,                  ACTION_ACTIVE, -1
6981   },
6982   {
6983     Xfake_grass,                        TRUE,   FALSE,
6984     EL_EMC_FAKE_GRASS,                  -1, -1
6985   },
6986   {
6987     Xfake_grassB,                       FALSE,  FALSE,
6988     EL_EMC_FAKE_GRASS,                  ACTION_ACTIVE, -1
6989   },
6990   {
6991     Xfake_door_1,                       TRUE,   FALSE,
6992     EL_EM_GATE_1_GRAY,                  -1, -1
6993   },
6994   {
6995     Xfake_door_2,                       TRUE,   FALSE,
6996     EL_EM_GATE_2_GRAY,                  -1, -1
6997   },
6998   {
6999     Xfake_door_3,                       TRUE,   FALSE,
7000     EL_EM_GATE_3_GRAY,                  -1, -1
7001   },
7002   {
7003     Xfake_door_4,                       TRUE,   FALSE,
7004     EL_EM_GATE_4_GRAY,                  -1, -1
7005   },
7006   {
7007     Xfake_door_5,                       TRUE,   FALSE,
7008     EL_EMC_GATE_5_GRAY,                 -1, -1
7009   },
7010   {
7011     Xfake_door_6,                       TRUE,   FALSE,
7012     EL_EMC_GATE_6_GRAY,                 -1, -1
7013   },
7014   {
7015     Xfake_door_7,                       TRUE,   FALSE,
7016     EL_EMC_GATE_7_GRAY,                 -1, -1
7017   },
7018   {
7019     Xfake_door_8,                       TRUE,   FALSE,
7020     EL_EMC_GATE_8_GRAY,                 -1, -1
7021   },
7022   {
7023     Xfake_acid_1,                       TRUE,   FALSE,
7024     EL_EMC_FAKE_ACID,                   -1, -1
7025   },
7026   {
7027     Xfake_acid_2,                       FALSE,  FALSE,
7028     EL_EMC_FAKE_ACID,                   -1, -1
7029   },
7030   {
7031     Xfake_acid_3,                       FALSE,  FALSE,
7032     EL_EMC_FAKE_ACID,                   -1, -1
7033   },
7034   {
7035     Xfake_acid_4,                       FALSE,  FALSE,
7036     EL_EMC_FAKE_ACID,                   -1, -1
7037   },
7038   {
7039     Xfake_acid_5,                       FALSE,  FALSE,
7040     EL_EMC_FAKE_ACID,                   -1, -1
7041   },
7042   {
7043     Xfake_acid_6,                       FALSE,  FALSE,
7044     EL_EMC_FAKE_ACID,                   -1, -1
7045   },
7046   {
7047     Xfake_acid_7,                       FALSE,  FALSE,
7048     EL_EMC_FAKE_ACID,                   -1, -1
7049   },
7050   {
7051     Xfake_acid_8,                       FALSE,  FALSE,
7052     EL_EMC_FAKE_ACID,                   -1, -1
7053   },
7054   {
7055     Xsteel_1,                           TRUE,   FALSE,
7056     EL_STEELWALL,                       -1, -1
7057   },
7058   {
7059     Xsteel_2,                           TRUE,   FALSE,
7060     EL_EMC_STEELWALL_2,                 -1, -1
7061   },
7062   {
7063     Xsteel_3,                           TRUE,   FALSE,
7064     EL_EMC_STEELWALL_3,                 -1, -1
7065   },
7066   {
7067     Xsteel_4,                           TRUE,   FALSE,
7068     EL_EMC_STEELWALL_4,                 -1, -1
7069   },
7070   {
7071     Xwall_1,                            TRUE,   FALSE,
7072     EL_WALL,                            -1, -1
7073   },
7074   {
7075     Xwall_2,                            TRUE,   FALSE,
7076     EL_EMC_WALL_14,                     -1, -1
7077   },
7078   {
7079     Xwall_3,                            TRUE,   FALSE,
7080     EL_EMC_WALL_15,                     -1, -1
7081   },
7082   {
7083     Xwall_4,                            TRUE,   FALSE,
7084     EL_EMC_WALL_16,                     -1, -1
7085   },
7086   {
7087     Xround_wall_1,                      TRUE,   FALSE,
7088     EL_WALL_SLIPPERY,                   -1, -1
7089   },
7090   {
7091     Xround_wall_2,                      TRUE,   FALSE,
7092     EL_EMC_WALL_SLIPPERY_2,             -1, -1
7093   },
7094   {
7095     Xround_wall_3,                      TRUE,   FALSE,
7096     EL_EMC_WALL_SLIPPERY_3,             -1, -1
7097   },
7098   {
7099     Xround_wall_4,                      TRUE,   FALSE,
7100     EL_EMC_WALL_SLIPPERY_4,             -1, -1
7101   },
7102   {
7103     Xdecor_1,                           TRUE,   FALSE,
7104     EL_EMC_WALL_8,                      -1, -1
7105   },
7106   {
7107     Xdecor_2,                           TRUE,   FALSE,
7108     EL_EMC_WALL_6,                      -1, -1
7109   },
7110   {
7111     Xdecor_3,                           TRUE,   FALSE,
7112     EL_EMC_WALL_4,                      -1, -1
7113   },
7114   {
7115     Xdecor_4,                           TRUE,   FALSE,
7116     EL_EMC_WALL_7,                      -1, -1
7117   },
7118   {
7119     Xdecor_5,                           TRUE,   FALSE,
7120     EL_EMC_WALL_5,                      -1, -1
7121   },
7122   {
7123     Xdecor_6,                           TRUE,   FALSE,
7124     EL_EMC_WALL_9,                      -1, -1
7125   },
7126   {
7127     Xdecor_7,                           TRUE,   FALSE,
7128     EL_EMC_WALL_10,                     -1, -1
7129   },
7130   {
7131     Xdecor_8,                           TRUE,   FALSE,
7132     EL_EMC_WALL_1,                      -1, -1
7133   },
7134   {
7135     Xdecor_9,                           TRUE,   FALSE,
7136     EL_EMC_WALL_2,                      -1, -1
7137   },
7138   {
7139     Xdecor_10,                          TRUE,   FALSE,
7140     EL_EMC_WALL_3,                      -1, -1
7141   },
7142   {
7143     Xdecor_11,                          TRUE,   FALSE,
7144     EL_EMC_WALL_11,                     -1, -1
7145   },
7146   {
7147     Xdecor_12,                          TRUE,   FALSE,
7148     EL_EMC_WALL_12,                     -1, -1
7149   },
7150   {
7151     Xalpha_0,                           TRUE,   FALSE,
7152     EL_CHAR('0'),                       -1, -1
7153   },
7154   {
7155     Xalpha_1,                           TRUE,   FALSE,
7156     EL_CHAR('1'),                       -1, -1
7157   },
7158   {
7159     Xalpha_2,                           TRUE,   FALSE,
7160     EL_CHAR('2'),                       -1, -1
7161   },
7162   {
7163     Xalpha_3,                           TRUE,   FALSE,
7164     EL_CHAR('3'),                       -1, -1
7165   },
7166   {
7167     Xalpha_4,                           TRUE,   FALSE,
7168     EL_CHAR('4'),                       -1, -1
7169   },
7170   {
7171     Xalpha_5,                           TRUE,   FALSE,
7172     EL_CHAR('5'),                       -1, -1
7173   },
7174   {
7175     Xalpha_6,                           TRUE,   FALSE,
7176     EL_CHAR('6'),                       -1, -1
7177   },
7178   {
7179     Xalpha_7,                           TRUE,   FALSE,
7180     EL_CHAR('7'),                       -1, -1
7181   },
7182   {
7183     Xalpha_8,                           TRUE,   FALSE,
7184     EL_CHAR('8'),                       -1, -1
7185   },
7186   {
7187     Xalpha_9,                           TRUE,   FALSE,
7188     EL_CHAR('9'),                       -1, -1
7189   },
7190   {
7191     Xalpha_excla,                       TRUE,   FALSE,
7192     EL_CHAR('!'),                       -1, -1
7193   },
7194   {
7195     Xalpha_quote,                       TRUE,   FALSE,
7196     EL_CHAR('"'),                       -1, -1
7197   },
7198   {
7199     Xalpha_comma,                       TRUE,   FALSE,
7200     EL_CHAR(','),                       -1, -1
7201   },
7202   {
7203     Xalpha_minus,                       TRUE,   FALSE,
7204     EL_CHAR('-'),                       -1, -1
7205   },
7206   {
7207     Xalpha_perio,                       TRUE,   FALSE,
7208     EL_CHAR('.'),                       -1, -1
7209   },
7210   {
7211     Xalpha_colon,                       TRUE,   FALSE,
7212     EL_CHAR(':'),                       -1, -1
7213   },
7214   {
7215     Xalpha_quest,                       TRUE,   FALSE,
7216     EL_CHAR('?'),                       -1, -1
7217   },
7218   {
7219     Xalpha_a,                           TRUE,   FALSE,
7220     EL_CHAR('A'),                       -1, -1
7221   },
7222   {
7223     Xalpha_b,                           TRUE,   FALSE,
7224     EL_CHAR('B'),                       -1, -1
7225   },
7226   {
7227     Xalpha_c,                           TRUE,   FALSE,
7228     EL_CHAR('C'),                       -1, -1
7229   },
7230   {
7231     Xalpha_d,                           TRUE,   FALSE,
7232     EL_CHAR('D'),                       -1, -1
7233   },
7234   {
7235     Xalpha_e,                           TRUE,   FALSE,
7236     EL_CHAR('E'),                       -1, -1
7237   },
7238   {
7239     Xalpha_f,                           TRUE,   FALSE,
7240     EL_CHAR('F'),                       -1, -1
7241   },
7242   {
7243     Xalpha_g,                           TRUE,   FALSE,
7244     EL_CHAR('G'),                       -1, -1
7245   },
7246   {
7247     Xalpha_h,                           TRUE,   FALSE,
7248     EL_CHAR('H'),                       -1, -1
7249   },
7250   {
7251     Xalpha_i,                           TRUE,   FALSE,
7252     EL_CHAR('I'),                       -1, -1
7253   },
7254   {
7255     Xalpha_j,                           TRUE,   FALSE,
7256     EL_CHAR('J'),                       -1, -1
7257   },
7258   {
7259     Xalpha_k,                           TRUE,   FALSE,
7260     EL_CHAR('K'),                       -1, -1
7261   },
7262   {
7263     Xalpha_l,                           TRUE,   FALSE,
7264     EL_CHAR('L'),                       -1, -1
7265   },
7266   {
7267     Xalpha_m,                           TRUE,   FALSE,
7268     EL_CHAR('M'),                       -1, -1
7269   },
7270   {
7271     Xalpha_n,                           TRUE,   FALSE,
7272     EL_CHAR('N'),                       -1, -1
7273   },
7274   {
7275     Xalpha_o,                           TRUE,   FALSE,
7276     EL_CHAR('O'),                       -1, -1
7277   },
7278   {
7279     Xalpha_p,                           TRUE,   FALSE,
7280     EL_CHAR('P'),                       -1, -1
7281   },
7282   {
7283     Xalpha_q,                           TRUE,   FALSE,
7284     EL_CHAR('Q'),                       -1, -1
7285   },
7286   {
7287     Xalpha_r,                           TRUE,   FALSE,
7288     EL_CHAR('R'),                       -1, -1
7289   },
7290   {
7291     Xalpha_s,                           TRUE,   FALSE,
7292     EL_CHAR('S'),                       -1, -1
7293   },
7294   {
7295     Xalpha_t,                           TRUE,   FALSE,
7296     EL_CHAR('T'),                       -1, -1
7297   },
7298   {
7299     Xalpha_u,                           TRUE,   FALSE,
7300     EL_CHAR('U'),                       -1, -1
7301   },
7302   {
7303     Xalpha_v,                           TRUE,   FALSE,
7304     EL_CHAR('V'),                       -1, -1
7305   },
7306   {
7307     Xalpha_w,                           TRUE,   FALSE,
7308     EL_CHAR('W'),                       -1, -1
7309   },
7310   {
7311     Xalpha_x,                           TRUE,   FALSE,
7312     EL_CHAR('X'),                       -1, -1
7313   },
7314   {
7315     Xalpha_y,                           TRUE,   FALSE,
7316     EL_CHAR('Y'),                       -1, -1
7317   },
7318   {
7319     Xalpha_z,                           TRUE,   FALSE,
7320     EL_CHAR('Z'),                       -1, -1
7321   },
7322   {
7323     Xalpha_arrow_e,                     TRUE,   FALSE,
7324     EL_CHAR('>'),                       -1, -1
7325   },
7326   {
7327     Xalpha_arrow_w,                     TRUE,   FALSE,
7328     EL_CHAR('<'),                       -1, -1
7329   },
7330   {
7331     Xalpha_copyr,                       TRUE,   FALSE,
7332     EL_CHAR(CHAR_BYTE_COPYRIGHT),       -1, -1
7333   },
7334
7335   {
7336     Xboom_bug,                          FALSE,  FALSE,
7337     EL_BUG,                             ACTION_EXPLODING, -1
7338   },
7339   {
7340     Xboom_bomb,                         FALSE,  FALSE,
7341     EL_BOMB,                            ACTION_EXPLODING, -1
7342   },
7343   {
7344     Xboom_android,                      FALSE,  FALSE,
7345     EL_EMC_ANDROID,                     ACTION_OTHER, -1
7346   },
7347   {
7348     Xboom_1,                            FALSE,  FALSE,
7349     EL_DEFAULT,                         ACTION_EXPLODING, -1
7350   },
7351   {
7352     Xboom_2,                            FALSE,  FALSE,
7353     EL_DEFAULT,                         ACTION_EXPLODING, -1
7354   },
7355   {
7356     Znormal,                            FALSE,  FALSE,
7357     EL_EMPTY,                           -1, -1
7358   },
7359   {
7360     Zdynamite,                          FALSE,  FALSE,
7361     EL_EMPTY,                           -1, -1
7362   },
7363   {
7364     Zplayer,                            FALSE,  FALSE,
7365     EL_EMPTY,                           -1, -1
7366   },
7367   {
7368     ZBORDER,                            FALSE,  FALSE,
7369     EL_EMPTY,                           -1, -1
7370   },
7371
7372   {
7373     -1,                                 FALSE,  FALSE,
7374     -1,                                 -1, -1
7375   }
7376 };
7377
7378 static struct Mapping_EM_to_RND_player
7379 {
7380   int action_em;
7381   int player_nr;
7382
7383   int element_rnd;
7384   int action;
7385   int direction;
7386 }
7387 em_player_mapping_list[] =
7388 {
7389   {
7390     SPR_walk + 0,                       0,
7391     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_UP,
7392   },
7393   {
7394     SPR_walk + 1,                       0,
7395     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_RIGHT,
7396   },
7397   {
7398     SPR_walk + 2,                       0,
7399     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_DOWN,
7400   },
7401   {
7402     SPR_walk + 3,                       0,
7403     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_LEFT,
7404   },
7405   {
7406     SPR_push + 0,                       0,
7407     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_UP,
7408   },
7409   {
7410     SPR_push + 1,                       0,
7411     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_RIGHT,
7412   },
7413   {
7414     SPR_push + 2,                       0,
7415     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_DOWN,
7416   },
7417   {
7418     SPR_push + 3,                       0,
7419     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_LEFT,
7420   },
7421   {
7422     SPR_spray + 0,                      0,
7423     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_UP,
7424   },
7425   {
7426     SPR_spray + 1,                      0,
7427     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7428   },
7429   {
7430     SPR_spray + 2,                      0,
7431     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_DOWN,
7432   },
7433   {
7434     SPR_spray + 3,                      0,
7435     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_LEFT,
7436   },
7437   {
7438     SPR_walk + 0,                       1,
7439     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_UP,
7440   },
7441   {
7442     SPR_walk + 1,                       1,
7443     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_RIGHT,
7444   },
7445   {
7446     SPR_walk + 2,                       1,
7447     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_DOWN,
7448   },
7449   {
7450     SPR_walk + 3,                       1,
7451     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_LEFT,
7452   },
7453   {
7454     SPR_push + 0,                       1,
7455     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_UP,
7456   },
7457   {
7458     SPR_push + 1,                       1,
7459     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_RIGHT,
7460   },
7461   {
7462     SPR_push + 2,                       1,
7463     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_DOWN,
7464   },
7465   {
7466     SPR_push + 3,                       1,
7467     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_LEFT,
7468   },
7469   {
7470     SPR_spray + 0,                      1,
7471     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_UP,
7472   },
7473   {
7474     SPR_spray + 1,                      1,
7475     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7476   },
7477   {
7478     SPR_spray + 2,                      1,
7479     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_DOWN,
7480   },
7481   {
7482     SPR_spray + 3,                      1,
7483     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_LEFT,
7484   },
7485   {
7486     SPR_still,                          0,
7487     EL_PLAYER_1,                        ACTION_DEFAULT, -1,
7488   },
7489   {
7490     SPR_still,                          1,
7491     EL_PLAYER_2,                        ACTION_DEFAULT, -1,
7492   },
7493   {
7494     SPR_walk + 0,                       2,
7495     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_UP,
7496   },
7497   {
7498     SPR_walk + 1,                       2,
7499     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_RIGHT,
7500   },
7501   {
7502     SPR_walk + 2,                       2,
7503     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_DOWN,
7504   },
7505   {
7506     SPR_walk + 3,                       2,
7507     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_LEFT,
7508   },
7509   {
7510     SPR_push + 0,                       2,
7511     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_UP,
7512   },
7513   {
7514     SPR_push + 1,                       2,
7515     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_RIGHT,
7516   },
7517   {
7518     SPR_push + 2,                       2,
7519     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_DOWN,
7520   },
7521   {
7522     SPR_push + 3,                       2,
7523     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_LEFT,
7524   },
7525   {
7526     SPR_spray + 0,                      2,
7527     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_UP,
7528   },
7529   {
7530     SPR_spray + 1,                      2,
7531     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7532   },
7533   {
7534     SPR_spray + 2,                      2,
7535     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_DOWN,
7536   },
7537   {
7538     SPR_spray + 3,                      2,
7539     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_LEFT,
7540   },
7541   {
7542     SPR_walk + 0,                       3,
7543     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_UP,
7544   },
7545   {
7546     SPR_walk + 1,                       3,
7547     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_RIGHT,
7548   },
7549   {
7550     SPR_walk + 2,                       3,
7551     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_DOWN,
7552   },
7553   {
7554     SPR_walk + 3,                       3,
7555     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_LEFT,
7556   },
7557   {
7558     SPR_push + 0,                       3,
7559     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_UP,
7560   },
7561   {
7562     SPR_push + 1,                       3,
7563     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_RIGHT,
7564   },
7565   {
7566     SPR_push + 2,                       3,
7567     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_DOWN,
7568   },
7569   {
7570     SPR_push + 3,                       3,
7571     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_LEFT,
7572   },
7573   {
7574     SPR_spray + 0,                      3,
7575     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_UP,
7576   },
7577   {
7578     SPR_spray + 1,                      3,
7579     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7580   },
7581   {
7582     SPR_spray + 2,                      3,
7583     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_DOWN,
7584   },
7585   {
7586     SPR_spray + 3,                      3,
7587     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_LEFT,
7588   },
7589   {
7590     SPR_still,                          2,
7591     EL_PLAYER_3,                        ACTION_DEFAULT, -1,
7592   },
7593   {
7594     SPR_still,                          3,
7595     EL_PLAYER_4,                        ACTION_DEFAULT, -1,
7596   },
7597
7598   {
7599     -1,                                 -1,
7600     -1,                                 -1, -1
7601   }
7602 };
7603
7604 int map_element_RND_to_EM(int element_rnd)
7605 {
7606   static unsigned short mapping_RND_to_EM[NUM_FILE_ELEMENTS];
7607   static boolean mapping_initialized = FALSE;
7608
7609   if (!mapping_initialized)
7610   {
7611     int i;
7612
7613     // return "Xalpha_quest" for all undefined elements in mapping array
7614     for (i = 0; i < NUM_FILE_ELEMENTS; i++)
7615       mapping_RND_to_EM[i] = Xalpha_quest;
7616
7617     for (i = 0; em_object_mapping_list[i].element_em != -1; i++)
7618       if (em_object_mapping_list[i].is_rnd_to_em_mapping)
7619         mapping_RND_to_EM[em_object_mapping_list[i].element_rnd] =
7620           em_object_mapping_list[i].element_em;
7621
7622     mapping_initialized = TRUE;
7623   }
7624
7625   if (element_rnd >= 0 && element_rnd < NUM_FILE_ELEMENTS)
7626     return mapping_RND_to_EM[element_rnd];
7627
7628   Error(ERR_WARN, "invalid RND level element %d", element_rnd);
7629
7630   return EL_UNKNOWN;
7631 }
7632
7633 int map_element_EM_to_RND(int element_em)
7634 {
7635   static unsigned short mapping_EM_to_RND[TILE_MAX];
7636   static boolean mapping_initialized = FALSE;
7637
7638   if (!mapping_initialized)
7639   {
7640     int i;
7641
7642     // return "EL_UNKNOWN" for all undefined elements in mapping array
7643     for (i = 0; i < TILE_MAX; i++)
7644       mapping_EM_to_RND[i] = EL_UNKNOWN;
7645
7646     for (i = 0; em_object_mapping_list[i].element_em != -1; i++)
7647       mapping_EM_to_RND[em_object_mapping_list[i].element_em] =
7648         em_object_mapping_list[i].element_rnd;
7649
7650     mapping_initialized = TRUE;
7651   }
7652
7653   if (element_em >= 0 && element_em < TILE_MAX)
7654     return mapping_EM_to_RND[element_em];
7655
7656   Error(ERR_WARN, "invalid EM level element %d", element_em);
7657
7658   return EL_UNKNOWN;
7659 }
7660
7661 void map_android_clone_elements_RND_to_EM(struct LevelInfo *level)
7662 {
7663   struct LevelInfo_EM *level_em = level->native_em_level;
7664   struct LEVEL *lev = level_em->lev;
7665   int i, j;
7666
7667   for (i = 0; i < TILE_MAX; i++)
7668     lev->android_array[i] = Xblank;
7669
7670   for (i = 0; i < level->num_android_clone_elements; i++)
7671   {
7672     int element_rnd = level->android_clone_element[i];
7673     int element_em = map_element_RND_to_EM(element_rnd);
7674
7675     for (j = 0; em_object_mapping_list[j].element_em != -1; j++)
7676       if (em_object_mapping_list[j].element_rnd == element_rnd)
7677         lev->android_array[em_object_mapping_list[j].element_em] = element_em;
7678   }
7679 }
7680
7681 void map_android_clone_elements_EM_to_RND(struct LevelInfo *level)
7682 {
7683   struct LevelInfo_EM *level_em = level->native_em_level;
7684   struct LEVEL *lev = level_em->lev;
7685   int i, j;
7686
7687   level->num_android_clone_elements = 0;
7688
7689   for (i = 0; i < TILE_MAX; i++)
7690   {
7691     int element_em = lev->android_array[i];
7692     int element_rnd;
7693     boolean element_found = FALSE;
7694
7695     if (element_em == Xblank)
7696       continue;
7697
7698     element_rnd = map_element_EM_to_RND(element_em);
7699
7700     for (j = 0; j < level->num_android_clone_elements; j++)
7701       if (level->android_clone_element[j] == element_rnd)
7702         element_found = TRUE;
7703
7704     if (!element_found)
7705     {
7706       level->android_clone_element[level->num_android_clone_elements++] =
7707         element_rnd;
7708
7709       if (level->num_android_clone_elements == MAX_ANDROID_ELEMENTS)
7710         break;
7711     }
7712   }
7713
7714   if (level->num_android_clone_elements == 0)
7715   {
7716     level->num_android_clone_elements = 1;
7717     level->android_clone_element[0] = EL_EMPTY;
7718   }
7719 }
7720
7721 int map_direction_RND_to_EM(int direction)
7722 {
7723   return (direction == MV_UP    ? 0 :
7724           direction == MV_RIGHT ? 1 :
7725           direction == MV_DOWN  ? 2 :
7726           direction == MV_LEFT  ? 3 :
7727           -1);
7728 }
7729
7730 int map_direction_EM_to_RND(int direction)
7731 {
7732   return (direction == 0 ? MV_UP    :
7733           direction == 1 ? MV_RIGHT :
7734           direction == 2 ? MV_DOWN  :
7735           direction == 3 ? MV_LEFT  :
7736           MV_NONE);
7737 }
7738
7739 int map_element_RND_to_SP(int element_rnd)
7740 {
7741   int element_sp = 0x20;        // map unknown elements to yellow "hardware"
7742
7743   if (element_rnd >= EL_SP_START &&
7744       element_rnd <= EL_SP_END)
7745     element_sp = element_rnd - EL_SP_START;
7746   else if (element_rnd == EL_EMPTY_SPACE)
7747     element_sp = 0x00;
7748   else if (element_rnd == EL_INVISIBLE_WALL)
7749     element_sp = 0x28;
7750
7751   return element_sp;
7752 }
7753
7754 int map_element_SP_to_RND(int element_sp)
7755 {
7756   int element_rnd = EL_UNKNOWN;
7757
7758   if (element_sp >= 0x00 &&
7759       element_sp <= 0x27)
7760     element_rnd = EL_SP_START + element_sp;
7761   else if (element_sp == 0x28)
7762     element_rnd = EL_INVISIBLE_WALL;
7763
7764   return element_rnd;
7765 }
7766
7767 int map_action_SP_to_RND(int action_sp)
7768 {
7769   switch (action_sp)
7770   {
7771     case actActive:             return ACTION_ACTIVE;
7772     case actImpact:             return ACTION_IMPACT;
7773     case actExploding:          return ACTION_EXPLODING;
7774     case actDigging:            return ACTION_DIGGING;
7775     case actSnapping:           return ACTION_SNAPPING;
7776     case actCollecting:         return ACTION_COLLECTING;
7777     case actPassing:            return ACTION_PASSING;
7778     case actPushing:            return ACTION_PUSHING;
7779     case actDropping:           return ACTION_DROPPING;
7780
7781     default:                    return ACTION_DEFAULT;
7782   }
7783 }
7784
7785 int map_element_RND_to_MM(int element_rnd)
7786 {
7787   return (element_rnd >= EL_MM_START_1 &&
7788           element_rnd <= EL_MM_END_1 ?
7789           EL_MM_START_1_NATIVE + element_rnd - EL_MM_START_1 :
7790
7791           element_rnd >= EL_MM_START_2 &&
7792           element_rnd <= EL_MM_END_2 ?
7793           EL_MM_START_2_NATIVE + element_rnd - EL_MM_START_2 :
7794
7795           element_rnd >= EL_CHAR_START &&
7796           element_rnd <= EL_CHAR_END ?
7797           EL_MM_CHAR_START_NATIVE + element_rnd - EL_CHAR_START :
7798
7799           element_rnd >= EL_MM_RUNTIME_START &&
7800           element_rnd <= EL_MM_RUNTIME_END ?
7801           EL_MM_RUNTIME_START_NATIVE + element_rnd - EL_MM_RUNTIME_START :
7802
7803           element_rnd >= EL_MM_DUMMY_START &&
7804           element_rnd <= EL_MM_DUMMY_END ?
7805           EL_MM_DUMMY_START_NATIVE + element_rnd - EL_MM_DUMMY_START :
7806
7807           EL_MM_EMPTY_NATIVE);
7808 }
7809
7810 int map_element_MM_to_RND(int element_mm)
7811 {
7812   return (element_mm == EL_MM_EMPTY_NATIVE ||
7813           element_mm == EL_DF_EMPTY_NATIVE ?
7814           EL_EMPTY :
7815
7816           element_mm >= EL_MM_START_1_NATIVE &&
7817           element_mm <= EL_MM_END_1_NATIVE ?
7818           EL_MM_START_1 + element_mm - EL_MM_START_1_NATIVE :
7819
7820           element_mm >= EL_MM_START_2_NATIVE &&
7821           element_mm <= EL_MM_END_2_NATIVE ?
7822           EL_MM_START_2 + element_mm - EL_MM_START_2_NATIVE :
7823
7824           element_mm >= EL_MM_CHAR_START_NATIVE &&
7825           element_mm <= EL_MM_CHAR_END_NATIVE ?
7826           EL_CHAR_START + element_mm - EL_MM_CHAR_START_NATIVE :
7827
7828           element_mm >= EL_MM_RUNTIME_START_NATIVE &&
7829           element_mm <= EL_MM_RUNTIME_END_NATIVE ?
7830           EL_MM_RUNTIME_START + element_mm - EL_MM_RUNTIME_START_NATIVE :
7831
7832           element_mm >= EL_MM_DUMMY_START_NATIVE &&
7833           element_mm <= EL_MM_DUMMY_END_NATIVE ?
7834           EL_MM_DUMMY_START + element_mm - EL_MM_DUMMY_START_NATIVE :
7835
7836           EL_EMPTY);
7837 }
7838
7839 int map_action_MM_to_RND(int action_mm)
7840 {
7841   // all MM actions are defined to exactly match their RND counterparts
7842   return action_mm;
7843 }
7844
7845 int map_sound_MM_to_RND(int sound_mm)
7846 {
7847   switch (sound_mm)
7848   {
7849     case SND_MM_GAME_LEVELTIME_CHARGING:
7850       return SND_GAME_LEVELTIME_CHARGING;
7851
7852     case SND_MM_GAME_HEALTH_CHARGING:
7853       return SND_GAME_HEALTH_CHARGING;
7854
7855     default:
7856       return SND_UNDEFINED;
7857   }
7858 }
7859
7860 int map_mm_wall_element(int element)
7861 {
7862   return (element >= EL_MM_STEEL_WALL_START &&
7863           element <= EL_MM_STEEL_WALL_END ?
7864           EL_MM_STEEL_WALL :
7865
7866           element >= EL_MM_WOODEN_WALL_START &&
7867           element <= EL_MM_WOODEN_WALL_END ?
7868           EL_MM_WOODEN_WALL :
7869
7870           element >= EL_MM_ICE_WALL_START &&
7871           element <= EL_MM_ICE_WALL_END ?
7872           EL_MM_ICE_WALL :
7873
7874           element >= EL_MM_AMOEBA_WALL_START &&
7875           element <= EL_MM_AMOEBA_WALL_END ?
7876           EL_MM_AMOEBA_WALL :
7877
7878           element >= EL_DF_STEEL_WALL_START &&
7879           element <= EL_DF_STEEL_WALL_END ?
7880           EL_DF_STEEL_WALL :
7881
7882           element >= EL_DF_WOODEN_WALL_START &&
7883           element <= EL_DF_WOODEN_WALL_END ?
7884           EL_DF_WOODEN_WALL :
7885
7886           element);
7887 }
7888
7889 int map_mm_wall_element_editor(int element)
7890 {
7891   switch (element)
7892   {
7893     case EL_MM_STEEL_WALL:      return EL_MM_STEEL_WALL_START;
7894     case EL_MM_WOODEN_WALL:     return EL_MM_WOODEN_WALL_START;
7895     case EL_MM_ICE_WALL:        return EL_MM_ICE_WALL_START;
7896     case EL_MM_AMOEBA_WALL:     return EL_MM_AMOEBA_WALL_START;
7897     case EL_DF_STEEL_WALL:      return EL_DF_STEEL_WALL_START;
7898     case EL_DF_WOODEN_WALL:     return EL_DF_WOODEN_WALL_START;
7899
7900     default:                    return element;
7901   }
7902 }
7903
7904 int get_next_element(int element)
7905 {
7906   switch (element)
7907   {
7908     case EL_QUICKSAND_FILLING:          return EL_QUICKSAND_FULL;
7909     case EL_QUICKSAND_EMPTYING:         return EL_QUICKSAND_EMPTY;
7910     case EL_QUICKSAND_FAST_FILLING:     return EL_QUICKSAND_FAST_FULL;
7911     case EL_QUICKSAND_FAST_EMPTYING:    return EL_QUICKSAND_FAST_EMPTY;
7912     case EL_MAGIC_WALL_FILLING:         return EL_MAGIC_WALL_FULL;
7913     case EL_MAGIC_WALL_EMPTYING:        return EL_MAGIC_WALL_ACTIVE;
7914     case EL_BD_MAGIC_WALL_FILLING:      return EL_BD_MAGIC_WALL_FULL;
7915     case EL_BD_MAGIC_WALL_EMPTYING:     return EL_BD_MAGIC_WALL_ACTIVE;
7916     case EL_DC_MAGIC_WALL_FILLING:      return EL_DC_MAGIC_WALL_FULL;
7917     case EL_DC_MAGIC_WALL_EMPTYING:     return EL_DC_MAGIC_WALL_ACTIVE;
7918     case EL_AMOEBA_DROPPING:            return EL_AMOEBA_WET;
7919
7920     default:                            return element;
7921   }
7922 }
7923
7924 int el2img_mm(int element_mm)
7925 {
7926   return el2img(map_element_MM_to_RND(element_mm));
7927 }
7928
7929 int el_act_dir2img(int element, int action, int direction)
7930 {
7931   element = GFX_ELEMENT(element);
7932   direction = MV_DIR_TO_BIT(direction); // default: MV_NONE => MV_DOWN
7933
7934   // direction_graphic[][] == graphic[] for undefined direction graphics
7935   return element_info[element].direction_graphic[action][direction];
7936 }
7937
7938 static int el_act_dir2crm(int element, int action, int direction)
7939 {
7940   element = GFX_ELEMENT(element);
7941   direction = MV_DIR_TO_BIT(direction); // default: MV_NONE => MV_DOWN
7942
7943   // direction_graphic[][] == graphic[] for undefined direction graphics
7944   return element_info[element].direction_crumbled[action][direction];
7945 }
7946
7947 int el_act2img(int element, int action)
7948 {
7949   element = GFX_ELEMENT(element);
7950
7951   return element_info[element].graphic[action];
7952 }
7953
7954 int el_act2crm(int element, int action)
7955 {
7956   element = GFX_ELEMENT(element);
7957
7958   return element_info[element].crumbled[action];
7959 }
7960
7961 int el_dir2img(int element, int direction)
7962 {
7963   element = GFX_ELEMENT(element);
7964
7965   return el_act_dir2img(element, ACTION_DEFAULT, direction);
7966 }
7967
7968 int el2baseimg(int element)
7969 {
7970   return element_info[element].graphic[ACTION_DEFAULT];
7971 }
7972
7973 int el2img(int element)
7974 {
7975   element = GFX_ELEMENT(element);
7976
7977   return element_info[element].graphic[ACTION_DEFAULT];
7978 }
7979
7980 int el2edimg(int element)
7981 {
7982   element = GFX_ELEMENT(element);
7983
7984   return element_info[element].special_graphic[GFX_SPECIAL_ARG_EDITOR];
7985 }
7986
7987 int el2preimg(int element)
7988 {
7989   element = GFX_ELEMENT(element);
7990
7991   return element_info[element].special_graphic[GFX_SPECIAL_ARG_PREVIEW];
7992 }
7993
7994 int el2panelimg(int element)
7995 {
7996   element = GFX_ELEMENT(element);
7997
7998   return element_info[element].special_graphic[GFX_SPECIAL_ARG_PANEL];
7999 }
8000
8001 int font2baseimg(int font_nr)
8002 {
8003   return font_info[font_nr].special_graphic[GFX_SPECIAL_ARG_DEFAULT];
8004 }
8005
8006 int getBeltNrFromBeltElement(int element)
8007 {
8008   return (element < EL_CONVEYOR_BELT_2_LEFT ? 0 :
8009           element < EL_CONVEYOR_BELT_3_LEFT ? 1 :
8010           element < EL_CONVEYOR_BELT_4_LEFT ? 2 : 3);
8011 }
8012
8013 int getBeltNrFromBeltActiveElement(int element)
8014 {
8015   return (element < EL_CONVEYOR_BELT_2_LEFT_ACTIVE ? 0 :
8016           element < EL_CONVEYOR_BELT_3_LEFT_ACTIVE ? 1 :
8017           element < EL_CONVEYOR_BELT_4_LEFT_ACTIVE ? 2 : 3);
8018 }
8019
8020 int getBeltNrFromBeltSwitchElement(int element)
8021 {
8022   return (element < EL_CONVEYOR_BELT_2_SWITCH_LEFT ? 0 :
8023           element < EL_CONVEYOR_BELT_3_SWITCH_LEFT ? 1 :
8024           element < EL_CONVEYOR_BELT_4_SWITCH_LEFT ? 2 : 3);
8025 }
8026
8027 int getBeltDirNrFromBeltElement(int element)
8028 {
8029   static int belt_base_element[4] =
8030   {
8031     EL_CONVEYOR_BELT_1_LEFT,
8032     EL_CONVEYOR_BELT_2_LEFT,
8033     EL_CONVEYOR_BELT_3_LEFT,
8034     EL_CONVEYOR_BELT_4_LEFT
8035   };
8036
8037   int belt_nr = getBeltNrFromBeltElement(element);
8038   int belt_dir_nr = element - belt_base_element[belt_nr];
8039
8040   return (belt_dir_nr % 3);
8041 }
8042
8043 int getBeltDirNrFromBeltSwitchElement(int element)
8044 {
8045   static int belt_base_element[4] =
8046   {
8047     EL_CONVEYOR_BELT_1_SWITCH_LEFT,
8048     EL_CONVEYOR_BELT_2_SWITCH_LEFT,
8049     EL_CONVEYOR_BELT_3_SWITCH_LEFT,
8050     EL_CONVEYOR_BELT_4_SWITCH_LEFT
8051   };
8052
8053   int belt_nr = getBeltNrFromBeltSwitchElement(element);
8054   int belt_dir_nr = element - belt_base_element[belt_nr];
8055
8056   return (belt_dir_nr % 3);
8057 }
8058
8059 int getBeltDirFromBeltElement(int element)
8060 {
8061   static int belt_move_dir[3] =
8062   {
8063     MV_LEFT,
8064     MV_NONE,
8065     MV_RIGHT
8066   };
8067
8068   int belt_dir_nr = getBeltDirNrFromBeltElement(element);
8069
8070   return belt_move_dir[belt_dir_nr];
8071 }
8072
8073 int getBeltDirFromBeltSwitchElement(int element)
8074 {
8075   static int belt_move_dir[3] =
8076   {
8077     MV_LEFT,
8078     MV_NONE,
8079     MV_RIGHT
8080   };
8081
8082   int belt_dir_nr = getBeltDirNrFromBeltSwitchElement(element);
8083
8084   return belt_move_dir[belt_dir_nr];
8085 }
8086
8087 int getBeltElementFromBeltNrAndBeltDirNr(int belt_nr, int belt_dir_nr)
8088 {
8089   static int belt_base_element[4] =
8090   {
8091     EL_CONVEYOR_BELT_1_LEFT,
8092     EL_CONVEYOR_BELT_2_LEFT,
8093     EL_CONVEYOR_BELT_3_LEFT,
8094     EL_CONVEYOR_BELT_4_LEFT
8095   };
8096
8097   return belt_base_element[belt_nr] + belt_dir_nr;
8098 }
8099
8100 int getBeltElementFromBeltNrAndBeltDir(int belt_nr, int belt_dir)
8101 {
8102   int belt_dir_nr = (belt_dir == MV_LEFT ? 0 : belt_dir == MV_RIGHT ? 2 : 1);
8103
8104   return getBeltElementFromBeltNrAndBeltDirNr(belt_nr, belt_dir_nr);
8105 }
8106
8107 int getBeltSwitchElementFromBeltNrAndBeltDirNr(int belt_nr, int belt_dir_nr)
8108 {
8109   static int belt_base_element[4] =
8110   {
8111     EL_CONVEYOR_BELT_1_SWITCH_LEFT,
8112     EL_CONVEYOR_BELT_2_SWITCH_LEFT,
8113     EL_CONVEYOR_BELT_3_SWITCH_LEFT,
8114     EL_CONVEYOR_BELT_4_SWITCH_LEFT
8115   };
8116
8117   return belt_base_element[belt_nr] + belt_dir_nr;
8118 }
8119
8120 int getBeltSwitchElementFromBeltNrAndBeltDir(int belt_nr, int belt_dir)
8121 {
8122   int belt_dir_nr = (belt_dir == MV_LEFT ? 0 : belt_dir == MV_RIGHT ? 2 : 1);
8123
8124   return getBeltSwitchElementFromBeltNrAndBeltDirNr(belt_nr, belt_dir_nr);
8125 }
8126
8127 boolean getTeamMode_EM(void)
8128 {
8129   return game.team_mode || network_playing;
8130 }
8131
8132 int getGameFrameDelay_EM(int native_em_game_frame_delay)
8133 {
8134   int game_frame_delay_value;
8135
8136   game_frame_delay_value =
8137     (tape.playing && tape.fast_forward ? FfwdFrameDelay :
8138      GameFrameDelay == GAME_FRAME_DELAY ? native_em_game_frame_delay :
8139      GameFrameDelay);
8140
8141   if (tape.playing && tape.warp_forward && !tape.pausing)
8142     game_frame_delay_value = 0;
8143
8144   return game_frame_delay_value;
8145 }
8146
8147 unsigned int InitRND(int seed)
8148 {
8149   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
8150     return InitEngineRandom_EM(seed);
8151   else if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
8152     return InitEngineRandom_SP(seed);
8153   else if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
8154     return InitEngineRandom_MM(seed);
8155   else
8156     return InitEngineRandom_RND(seed);
8157 }
8158
8159 static struct Mapping_EM_to_RND_object object_mapping[TILE_MAX];
8160 static struct Mapping_EM_to_RND_player player_mapping[MAX_PLAYERS][SPR_MAX];
8161
8162 static int get_effective_element_EM(int tile, int frame_em)
8163 {
8164   int element             = object_mapping[tile].element_rnd;
8165   int action              = object_mapping[tile].action;
8166   boolean is_backside     = object_mapping[tile].is_backside;
8167   boolean action_removing = (action == ACTION_DIGGING ||
8168                              action == ACTION_SNAPPING ||
8169                              action == ACTION_COLLECTING);
8170
8171   if (frame_em < 7)
8172   {
8173     switch (tile)
8174     {
8175       case Yacid_splash_eB:
8176       case Yacid_splash_wB:
8177         return (frame_em > 5 ? EL_EMPTY : element);
8178
8179       default:
8180         return element;
8181     }
8182   }
8183   else  // frame_em == 7
8184   {
8185     switch (tile)
8186     {
8187       case Yacid_splash_eB:
8188       case Yacid_splash_wB:
8189         return EL_EMPTY;
8190
8191       case Yemerald_stone:
8192         return EL_EMERALD;
8193
8194       case Ydiamond_stone:
8195         return EL_ROCK;
8196
8197       case Xdrip_stretch:
8198       case Xdrip_stretchB:
8199       case Ydrip_s1:
8200       case Ydrip_s1B:
8201       case Xball_1B:
8202       case Xball_2:
8203       case Xball_2B:
8204       case Yball_eat:
8205       case Ykey_1_eat:
8206       case Ykey_2_eat:
8207       case Ykey_3_eat:
8208       case Ykey_4_eat:
8209       case Ykey_5_eat:
8210       case Ykey_6_eat:
8211       case Ykey_7_eat:
8212       case Ykey_8_eat:
8213       case Ylenses_eat:
8214       case Ymagnify_eat:
8215       case Ygrass_eat:
8216       case Ydirt_eat:
8217       case Xsand_stonein_1:
8218       case Xsand_stonein_2:
8219       case Xsand_stonein_3:
8220       case Xsand_stonein_4:
8221         return element;
8222
8223       default:
8224         return (is_backside || action_removing ? EL_EMPTY : element);
8225     }
8226   }
8227 }
8228
8229 static boolean check_linear_animation_EM(int tile)
8230 {
8231   switch (tile)
8232   {
8233     case Xsand_stonesand_1:
8234     case Xsand_stonesand_quickout_1:
8235     case Xsand_sandstone_1:
8236     case Xsand_stonein_1:
8237     case Xsand_stoneout_1:
8238     case Xboom_1:
8239     case Xdynamite_1:
8240     case Ybug_w_n:
8241     case Ybug_n_e:
8242     case Ybug_e_s:
8243     case Ybug_s_w:
8244     case Ybug_e_n:
8245     case Ybug_s_e:
8246     case Ybug_w_s:
8247     case Ybug_n_w:
8248     case Ytank_w_n:
8249     case Ytank_n_e:
8250     case Ytank_e_s:
8251     case Ytank_s_w:
8252     case Ytank_e_n:
8253     case Ytank_s_e:
8254     case Ytank_w_s:
8255     case Ytank_n_w:
8256     case Yacid_splash_eB:
8257     case Yacid_splash_wB:
8258     case Yemerald_stone:
8259       return TRUE;
8260   }
8261
8262   return FALSE;
8263 }
8264
8265 static void set_crumbled_graphics_EM(struct GraphicInfo_EM *g_em,
8266                                      boolean has_crumbled_graphics,
8267                                      int crumbled, int sync_frame)
8268 {
8269   // if element can be crumbled, but certain action graphics are just empty
8270   // space (like instantly snapping sand to empty space in 1 frame), do not
8271   // treat these empty space graphics as crumbled graphics in EMC engine
8272   if (crumbled == IMG_EMPTY_SPACE)
8273     has_crumbled_graphics = FALSE;
8274
8275   if (has_crumbled_graphics)
8276   {
8277     struct GraphicInfo *g_crumbled = &graphic_info[crumbled];
8278     int frame_crumbled = getAnimationFrame(g_crumbled->anim_frames,
8279                                            g_crumbled->anim_delay,
8280                                            g_crumbled->anim_mode,
8281                                            g_crumbled->anim_start_frame,
8282                                            sync_frame);
8283
8284     getGraphicSource(crumbled, frame_crumbled, &g_em->crumbled_bitmap,
8285                      &g_em->crumbled_src_x, &g_em->crumbled_src_y);
8286
8287     g_em->crumbled_border_size = graphic_info[crumbled].border_size;
8288     g_em->crumbled_tile_size = graphic_info[crumbled].tile_size;
8289
8290     g_em->has_crumbled_graphics = TRUE;
8291   }
8292   else
8293   {
8294     g_em->crumbled_bitmap = NULL;
8295     g_em->crumbled_src_x = 0;
8296     g_em->crumbled_src_y = 0;
8297     g_em->crumbled_border_size = 0;
8298     g_em->crumbled_tile_size = 0;
8299
8300     g_em->has_crumbled_graphics = FALSE;
8301   }
8302 }
8303
8304 #if 0
8305 void ResetGfxAnimation_EM(int x, int y, int tile)
8306 {
8307   GfxFrame[x][y] = 0;
8308 }
8309 #endif
8310
8311 void SetGfxAnimation_EM(struct GraphicInfo_EM *g_em,
8312                         int tile, int frame_em, int x, int y)
8313 {
8314   int action = object_mapping[tile].action;
8315   int direction = object_mapping[tile].direction;
8316   int effective_element = get_effective_element_EM(tile, frame_em);
8317   int graphic = (direction == MV_NONE ?
8318                  el_act2img(effective_element, action) :
8319                  el_act_dir2img(effective_element, action, direction));
8320   struct GraphicInfo *g = &graphic_info[graphic];
8321   int sync_frame;
8322   boolean action_removing = (action == ACTION_DIGGING ||
8323                              action == ACTION_SNAPPING ||
8324                              action == ACTION_COLLECTING);
8325   boolean action_moving   = (action == ACTION_FALLING ||
8326                              action == ACTION_MOVING ||
8327                              action == ACTION_PUSHING ||
8328                              action == ACTION_EATING ||
8329                              action == ACTION_FILLING ||
8330                              action == ACTION_EMPTYING);
8331   boolean action_falling  = (action == ACTION_FALLING ||
8332                              action == ACTION_FILLING ||
8333                              action == ACTION_EMPTYING);
8334
8335   // special case: graphic uses "2nd movement tile" and has defined
8336   // 7 frames for movement animation (or less) => use default graphic
8337   // for last (8th) frame which ends the movement animation
8338   if (g->double_movement && g->anim_frames < 8 && frame_em == 7)
8339   {
8340     action = ACTION_DEFAULT;    // (keep action_* unchanged for now)
8341     graphic = (direction == MV_NONE ?
8342                el_act2img(effective_element, action) :
8343                el_act_dir2img(effective_element, action, direction));
8344
8345     g = &graphic_info[graphic];
8346   }
8347
8348   if ((action_removing || check_linear_animation_EM(tile)) && frame_em == 0)
8349   {
8350     GfxFrame[x][y] = 0;
8351   }
8352   else if (action_moving)
8353   {
8354     boolean is_backside = object_mapping[tile].is_backside;
8355
8356     if (is_backside)
8357     {
8358       int direction = object_mapping[tile].direction;
8359       int move_dir = (action_falling ? MV_DOWN : direction);
8360
8361       GfxFrame[x][y]++;
8362
8363 #if 1
8364       // !!! TEST !!! NEW !!! DOES NOT WORK RIGHT YET !!!
8365       if (g->double_movement && frame_em == 0)
8366         GfxFrame[x][y] = 0;
8367 #endif
8368
8369       if (move_dir == MV_LEFT)
8370         GfxFrame[x - 1][y] = GfxFrame[x][y];
8371       else if (move_dir == MV_RIGHT)
8372         GfxFrame[x + 1][y] = GfxFrame[x][y];
8373       else if (move_dir == MV_UP)
8374         GfxFrame[x][y - 1] = GfxFrame[x][y];
8375       else if (move_dir == MV_DOWN)
8376         GfxFrame[x][y + 1] = GfxFrame[x][y];
8377     }
8378   }
8379   else
8380   {
8381     GfxFrame[x][y]++;
8382
8383     // special case: animation for Xsand_stonesand_quickout_1/2 twice as fast
8384     if (tile == Xsand_stonesand_quickout_1 ||
8385         tile == Xsand_stonesand_quickout_2)
8386       GfxFrame[x][y]++;
8387   }
8388
8389   if (graphic_info[graphic].anim_global_sync)
8390     sync_frame = FrameCounter;
8391   else if (IN_FIELD(x, y, MAX_LEV_FIELDX, MAX_LEV_FIELDY))
8392     sync_frame = GfxFrame[x][y];
8393   else
8394     sync_frame = 0;     // playfield border (pseudo steel)
8395
8396   SetRandomAnimationValue(x, y);
8397
8398   int frame = getAnimationFrame(g->anim_frames,
8399                                 g->anim_delay,
8400                                 g->anim_mode,
8401                                 g->anim_start_frame,
8402                                 sync_frame);
8403
8404   g_em->unique_identifier =
8405     (graphic << 16) | ((frame % 8) << 12) | (g_em->width << 6) | g_em->height;
8406 }
8407
8408 void getGraphicSourceObjectExt_EM(struct GraphicInfo_EM *g_em,
8409                                   int tile, int frame_em, int x, int y)
8410 {
8411   int action = object_mapping[tile].action;
8412   int direction = object_mapping[tile].direction;
8413   boolean is_backside = object_mapping[tile].is_backside;
8414   int effective_element = get_effective_element_EM(tile, frame_em);
8415   int effective_action = action;
8416   int graphic = (direction == MV_NONE ?
8417                  el_act2img(effective_element, effective_action) :
8418                  el_act_dir2img(effective_element, effective_action,
8419                                 direction));
8420   int crumbled = (direction == MV_NONE ?
8421                   el_act2crm(effective_element, effective_action) :
8422                   el_act_dir2crm(effective_element, effective_action,
8423                                  direction));
8424   int base_graphic = el_act2img(effective_element, ACTION_DEFAULT);
8425   int base_crumbled = el_act2crm(effective_element, ACTION_DEFAULT);
8426   boolean has_crumbled_graphics = (base_crumbled != base_graphic);
8427   struct GraphicInfo *g = &graphic_info[graphic];
8428   int sync_frame;
8429
8430   // special case: graphic uses "2nd movement tile" and has defined
8431   // 7 frames for movement animation (or less) => use default graphic
8432   // for last (8th) frame which ends the movement animation
8433   if (g->double_movement && g->anim_frames < 8 && frame_em == 7)
8434   {
8435     effective_action = ACTION_DEFAULT;
8436     graphic = (direction == MV_NONE ?
8437                el_act2img(effective_element, effective_action) :
8438                el_act_dir2img(effective_element, effective_action,
8439                               direction));
8440     crumbled = (direction == MV_NONE ?
8441                 el_act2crm(effective_element, effective_action) :
8442                 el_act_dir2crm(effective_element, effective_action,
8443                                direction));
8444
8445     g = &graphic_info[graphic];
8446   }
8447
8448   if (graphic_info[graphic].anim_global_sync)
8449     sync_frame = FrameCounter;
8450   else if (IN_FIELD(x, y, MAX_LEV_FIELDX, MAX_LEV_FIELDY))
8451     sync_frame = GfxFrame[x][y];
8452   else
8453     sync_frame = 0;     // playfield border (pseudo steel)
8454
8455   SetRandomAnimationValue(x, y);
8456
8457   int frame = getAnimationFrame(g->anim_frames,
8458                                 g->anim_delay,
8459                                 g->anim_mode,
8460                                 g->anim_start_frame,
8461                                 sync_frame);
8462
8463   getGraphicSourceExt(graphic, frame, &g_em->bitmap, &g_em->src_x, &g_em->src_y,
8464                       g->double_movement && is_backside);
8465
8466   // (updating the "crumbled" graphic definitions is probably not really needed,
8467   // as animations for crumbled graphics can't be longer than one EMC cycle)
8468   set_crumbled_graphics_EM(g_em, has_crumbled_graphics, crumbled,
8469                            sync_frame);
8470 }
8471
8472 void getGraphicSourcePlayerExt_EM(struct GraphicInfo_EM *g_em,
8473                                   int player_nr, int anim, int frame_em)
8474 {
8475   int element   = player_mapping[player_nr][anim].element_rnd;
8476   int action    = player_mapping[player_nr][anim].action;
8477   int direction = player_mapping[player_nr][anim].direction;
8478   int graphic = (direction == MV_NONE ?
8479                  el_act2img(element, action) :
8480                  el_act_dir2img(element, action, direction));
8481   struct GraphicInfo *g = &graphic_info[graphic];
8482   int sync_frame;
8483
8484   InitPlayerGfxAnimation(&stored_player[player_nr], action, direction);
8485
8486   stored_player[player_nr].StepFrame = frame_em;
8487
8488   sync_frame = stored_player[player_nr].Frame;
8489
8490   int frame = getAnimationFrame(g->anim_frames,
8491                                 g->anim_delay,
8492                                 g->anim_mode,
8493                                 g->anim_start_frame,
8494                                 sync_frame);
8495
8496   getGraphicSourceExt(graphic, frame, &g_em->bitmap,
8497                       &g_em->src_x, &g_em->src_y, FALSE);
8498 }
8499
8500 void InitGraphicInfo_EM(void)
8501 {
8502   int i, j, p;
8503
8504 #if DEBUG_EM_GFX
8505   int num_em_gfx_errors = 0;
8506
8507   if (graphic_info_em_object[0][0].bitmap == NULL)
8508   {
8509     // EM graphics not yet initialized in em_open_all()
8510
8511     return;
8512   }
8513
8514   printf("::: [4 errors can be ignored (1 x 'bomb', 3 x 'em_dynamite']\n");
8515 #endif
8516
8517   // always start with reliable default values
8518   for (i = 0; i < TILE_MAX; i++)
8519   {
8520     object_mapping[i].element_rnd = EL_UNKNOWN;
8521     object_mapping[i].is_backside = FALSE;
8522     object_mapping[i].action = ACTION_DEFAULT;
8523     object_mapping[i].direction = MV_NONE;
8524   }
8525
8526   // always start with reliable default values
8527   for (p = 0; p < MAX_PLAYERS; p++)
8528   {
8529     for (i = 0; i < SPR_MAX; i++)
8530     {
8531       player_mapping[p][i].element_rnd = EL_UNKNOWN;
8532       player_mapping[p][i].action = ACTION_DEFAULT;
8533       player_mapping[p][i].direction = MV_NONE;
8534     }
8535   }
8536
8537   for (i = 0; em_object_mapping_list[i].element_em != -1; i++)
8538   {
8539     int e = em_object_mapping_list[i].element_em;
8540
8541     object_mapping[e].element_rnd = em_object_mapping_list[i].element_rnd;
8542     object_mapping[e].is_backside = em_object_mapping_list[i].is_backside;
8543
8544     if (em_object_mapping_list[i].action != -1)
8545       object_mapping[e].action = em_object_mapping_list[i].action;
8546
8547     if (em_object_mapping_list[i].direction != -1)
8548       object_mapping[e].direction =
8549         MV_DIR_FROM_BIT(em_object_mapping_list[i].direction);
8550   }
8551
8552   for (i = 0; em_player_mapping_list[i].action_em != -1; i++)
8553   {
8554     int a = em_player_mapping_list[i].action_em;
8555     int p = em_player_mapping_list[i].player_nr;
8556
8557     player_mapping[p][a].element_rnd = em_player_mapping_list[i].element_rnd;
8558
8559     if (em_player_mapping_list[i].action != -1)
8560       player_mapping[p][a].action = em_player_mapping_list[i].action;
8561
8562     if (em_player_mapping_list[i].direction != -1)
8563       player_mapping[p][a].direction =
8564         MV_DIR_FROM_BIT(em_player_mapping_list[i].direction);
8565   }
8566
8567   for (i = 0; i < TILE_MAX; i++)
8568   {
8569     int element = object_mapping[i].element_rnd;
8570     int action = object_mapping[i].action;
8571     int direction = object_mapping[i].direction;
8572     boolean is_backside = object_mapping[i].is_backside;
8573     boolean action_exploding = ((action == ACTION_EXPLODING ||
8574                                  action == ACTION_SMASHED_BY_ROCK ||
8575                                  action == ACTION_SMASHED_BY_SPRING) &&
8576                                 element != EL_DIAMOND);
8577     boolean action_active = (action == ACTION_ACTIVE);
8578     boolean action_other = (action == ACTION_OTHER);
8579
8580     for (j = 0; j < 8; j++)
8581     {
8582       int effective_element = get_effective_element_EM(i, j);
8583       int effective_action = (j < 7 ? action :
8584                               i == Xdrip_stretch ? action :
8585                               i == Xdrip_stretchB ? action :
8586                               i == Ydrip_s1 ? action :
8587                               i == Ydrip_s1B ? action :
8588                               i == Xball_1B ? action :
8589                               i == Xball_2 ? action :
8590                               i == Xball_2B ? action :
8591                               i == Yball_eat ? action :
8592                               i == Ykey_1_eat ? action :
8593                               i == Ykey_2_eat ? action :
8594                               i == Ykey_3_eat ? action :
8595                               i == Ykey_4_eat ? action :
8596                               i == Ykey_5_eat ? action :
8597                               i == Ykey_6_eat ? action :
8598                               i == Ykey_7_eat ? action :
8599                               i == Ykey_8_eat ? action :
8600                               i == Ylenses_eat ? action :
8601                               i == Ymagnify_eat ? action :
8602                               i == Ygrass_eat ? action :
8603                               i == Ydirt_eat ? action :
8604                               i == Xsand_stonein_1 ? action :
8605                               i == Xsand_stonein_2 ? action :
8606                               i == Xsand_stonein_3 ? action :
8607                               i == Xsand_stonein_4 ? action :
8608                               i == Xsand_stoneout_1 ? action :
8609                               i == Xsand_stoneout_2 ? action :
8610                               i == Xboom_android ? ACTION_EXPLODING :
8611                               action_exploding ? ACTION_EXPLODING :
8612                               action_active ? action :
8613                               action_other ? action :
8614                               ACTION_DEFAULT);
8615       int graphic = (el_act_dir2img(effective_element, effective_action,
8616                                     direction));
8617       int crumbled = (el_act_dir2crm(effective_element, effective_action,
8618                                      direction));
8619       int base_graphic = el_act2img(effective_element, ACTION_DEFAULT);
8620       int base_crumbled = el_act2crm(effective_element, ACTION_DEFAULT);
8621       boolean has_action_graphics = (graphic != base_graphic);
8622       boolean has_crumbled_graphics = (base_crumbled != base_graphic);
8623       struct GraphicInfo *g = &graphic_info[graphic];
8624       struct GraphicInfo_EM *g_em = &graphic_info_em_object[i][7 - j];
8625       Bitmap *src_bitmap;
8626       int src_x, src_y;
8627       // ensure to get symmetric 3-frame, 2-delay animations as used in EM
8628       boolean special_animation = (action != ACTION_DEFAULT &&
8629                                    g->anim_frames == 3 &&
8630                                    g->anim_delay == 2 &&
8631                                    g->anim_mode & ANIM_LINEAR);
8632       int sync_frame = (i == Xdrip_stretch ? 7 :
8633                         i == Xdrip_stretchB ? 7 :
8634                         i == Ydrip_s2 ? j + 8 :
8635                         i == Ydrip_s2B ? j + 8 :
8636                         i == Xacid_1 ? 0 :
8637                         i == Xacid_2 ? 10 :
8638                         i == Xacid_3 ? 20 :
8639                         i == Xacid_4 ? 30 :
8640                         i == Xacid_5 ? 40 :
8641                         i == Xacid_6 ? 50 :
8642                         i == Xacid_7 ? 60 :
8643                         i == Xacid_8 ? 70 :
8644                         i == Xfake_acid_1 ? 0 :
8645                         i == Xfake_acid_2 ? 10 :
8646                         i == Xfake_acid_3 ? 20 :
8647                         i == Xfake_acid_4 ? 30 :
8648                         i == Xfake_acid_5 ? 40 :
8649                         i == Xfake_acid_6 ? 50 :
8650                         i == Xfake_acid_7 ? 60 :
8651                         i == Xfake_acid_8 ? 70 :
8652                         i == Xball_2 ? 7 :
8653                         i == Xball_2B ? j + 8 :
8654                         i == Yball_eat ? j + 1 :
8655                         i == Ykey_1_eat ? j + 1 :
8656                         i == Ykey_2_eat ? j + 1 :
8657                         i == Ykey_3_eat ? j + 1 :
8658                         i == Ykey_4_eat ? j + 1 :
8659                         i == Ykey_5_eat ? j + 1 :
8660                         i == Ykey_6_eat ? j + 1 :
8661                         i == Ykey_7_eat ? j + 1 :
8662                         i == Ykey_8_eat ? j + 1 :
8663                         i == Ylenses_eat ? j + 1 :
8664                         i == Ymagnify_eat ? j + 1 :
8665                         i == Ygrass_eat ? j + 1 :
8666                         i == Ydirt_eat ? j + 1 :
8667                         i == Xamoeba_1 ? 0 :
8668                         i == Xamoeba_2 ? 1 :
8669                         i == Xamoeba_3 ? 2 :
8670                         i == Xamoeba_4 ? 3 :
8671                         i == Xamoeba_5 ? 0 :
8672                         i == Xamoeba_6 ? 1 :
8673                         i == Xamoeba_7 ? 2 :
8674                         i == Xamoeba_8 ? 3 :
8675                         i == Xexit_2 ? j + 8 :
8676                         i == Xexit_3 ? j + 16 :
8677                         i == Xdynamite_1 ? 0 :
8678                         i == Xdynamite_2 ? 8 :
8679                         i == Xdynamite_3 ? 16 :
8680                         i == Xdynamite_4 ? 24 :
8681                         i == Xsand_stonein_1 ? j + 1 :
8682                         i == Xsand_stonein_2 ? j + 9 :
8683                         i == Xsand_stonein_3 ? j + 17 :
8684                         i == Xsand_stonein_4 ? j + 25 :
8685                         i == Xsand_stoneout_1 && j == 0 ? 0 :
8686                         i == Xsand_stoneout_1 && j == 1 ? 0 :
8687                         i == Xsand_stoneout_1 && j == 2 ? 1 :
8688                         i == Xsand_stoneout_1 && j == 3 ? 2 :
8689                         i == Xsand_stoneout_1 && j == 4 ? 2 :
8690                         i == Xsand_stoneout_1 && j == 5 ? 3 :
8691                         i == Xsand_stoneout_1 && j == 6 ? 4 :
8692                         i == Xsand_stoneout_1 && j == 7 ? 4 :
8693                         i == Xsand_stoneout_2 && j == 0 ? 5 :
8694                         i == Xsand_stoneout_2 && j == 1 ? 6 :
8695                         i == Xsand_stoneout_2 && j == 2 ? 7 :
8696                         i == Xsand_stoneout_2 && j == 3 ? 8 :
8697                         i == Xsand_stoneout_2 && j == 4 ? 9 :
8698                         i == Xsand_stoneout_2 && j == 5 ? 11 :
8699                         i == Xsand_stoneout_2 && j == 6 ? 13 :
8700                         i == Xsand_stoneout_2 && j == 7 ? 15 :
8701                         i == Xboom_bug && j == 1 ? 2 :
8702                         i == Xboom_bug && j == 2 ? 2 :
8703                         i == Xboom_bug && j == 3 ? 4 :
8704                         i == Xboom_bug && j == 4 ? 4 :
8705                         i == Xboom_bug && j == 5 ? 2 :
8706                         i == Xboom_bug && j == 6 ? 2 :
8707                         i == Xboom_bug && j == 7 ? 0 :
8708                         i == Xboom_bomb && j == 1 ? 2 :
8709                         i == Xboom_bomb && j == 2 ? 2 :
8710                         i == Xboom_bomb && j == 3 ? 4 :
8711                         i == Xboom_bomb && j == 4 ? 4 :
8712                         i == Xboom_bomb && j == 5 ? 2 :
8713                         i == Xboom_bomb && j == 6 ? 2 :
8714                         i == Xboom_bomb && j == 7 ? 0 :
8715                         i == Xboom_android && j == 7 ? 6 :
8716                         i == Xboom_1 && j == 1 ? 2 :
8717                         i == Xboom_1 && j == 2 ? 2 :
8718                         i == Xboom_1 && j == 3 ? 4 :
8719                         i == Xboom_1 && j == 4 ? 4 :
8720                         i == Xboom_1 && j == 5 ? 6 :
8721                         i == Xboom_1 && j == 6 ? 6 :
8722                         i == Xboom_1 && j == 7 ? 8 :
8723                         i == Xboom_2 && j == 0 ? 8 :
8724                         i == Xboom_2 && j == 1 ? 8 :
8725                         i == Xboom_2 && j == 2 ? 10 :
8726                         i == Xboom_2 && j == 3 ? 10 :
8727                         i == Xboom_2 && j == 4 ? 10 :
8728                         i == Xboom_2 && j == 5 ? 12 :
8729                         i == Xboom_2 && j == 6 ? 12 :
8730                         i == Xboom_2 && j == 7 ? 12 :
8731                         special_animation && j == 4 ? 3 :
8732                         effective_action != action ? 0 :
8733                         j);
8734
8735 #if DEBUG_EM_GFX
8736       Bitmap *debug_bitmap = g_em->bitmap;
8737       int debug_src_x = g_em->src_x;
8738       int debug_src_y = g_em->src_y;
8739 #endif
8740
8741       int frame = getAnimationFrame(g->anim_frames,
8742                                     g->anim_delay,
8743                                     g->anim_mode,
8744                                     g->anim_start_frame,
8745                                     sync_frame);
8746
8747       getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y,
8748                           g->double_movement && is_backside);
8749
8750       g_em->bitmap = src_bitmap;
8751       g_em->src_x = src_x;
8752       g_em->src_y = src_y;
8753       g_em->src_offset_x = 0;
8754       g_em->src_offset_y = 0;
8755       g_em->dst_offset_x = 0;
8756       g_em->dst_offset_y = 0;
8757       g_em->width  = TILEX;
8758       g_em->height = TILEY;
8759
8760       g_em->preserve_background = FALSE;
8761
8762       set_crumbled_graphics_EM(g_em, has_crumbled_graphics, crumbled,
8763                                sync_frame);
8764
8765       if ((!g->double_movement && (effective_action == ACTION_FALLING ||
8766                                    effective_action == ACTION_MOVING  ||
8767                                    effective_action == ACTION_PUSHING ||
8768                                    effective_action == ACTION_EATING)) ||
8769           (!has_action_graphics && (effective_action == ACTION_FILLING ||
8770                                     effective_action == ACTION_EMPTYING)))
8771       {
8772         int move_dir =
8773           (effective_action == ACTION_FALLING ||
8774            effective_action == ACTION_FILLING ||
8775            effective_action == ACTION_EMPTYING ? MV_DOWN : direction);
8776         int dx = (move_dir == MV_LEFT ? -1 : move_dir == MV_RIGHT ? 1 : 0);
8777         int dy = (move_dir == MV_UP   ? -1 : move_dir == MV_DOWN  ? 1 : 0);
8778         int num_steps = (i == Ydrip_s1  ? 16 :
8779                          i == Ydrip_s1B ? 16 :
8780                          i == Ydrip_s2  ? 16 :
8781                          i == Ydrip_s2B ? 16 :
8782                          i == Xsand_stonein_1 ? 32 :
8783                          i == Xsand_stonein_2 ? 32 :
8784                          i == Xsand_stonein_3 ? 32 :
8785                          i == Xsand_stonein_4 ? 32 :
8786                          i == Xsand_stoneout_1 ? 16 :
8787                          i == Xsand_stoneout_2 ? 16 : 8);
8788         int cx = ABS(dx) * (TILEX / num_steps);
8789         int cy = ABS(dy) * (TILEY / num_steps);
8790         int step_frame = (i == Ydrip_s2         ? j + 8 :
8791                           i == Ydrip_s2B        ? j + 8 :
8792                           i == Xsand_stonein_2  ? j + 8 :
8793                           i == Xsand_stonein_3  ? j + 16 :
8794                           i == Xsand_stonein_4  ? j + 24 :
8795                           i == Xsand_stoneout_2 ? j + 8 : j) + 1;
8796         int step = (is_backside ? step_frame : num_steps - step_frame);
8797
8798         if (is_backside)        // tile where movement starts
8799         {
8800           if (dx < 0 || dy < 0)
8801           {
8802             g_em->src_offset_x = cx * step;
8803             g_em->src_offset_y = cy * step;
8804           }
8805           else
8806           {
8807             g_em->dst_offset_x = cx * step;
8808             g_em->dst_offset_y = cy * step;
8809           }
8810         }
8811         else                    // tile where movement ends
8812         {
8813           if (dx < 0 || dy < 0)
8814           {
8815             g_em->dst_offset_x = cx * step;
8816             g_em->dst_offset_y = cy * step;
8817           }
8818           else
8819           {
8820             g_em->src_offset_x = cx * step;
8821             g_em->src_offset_y = cy * step;
8822           }
8823         }
8824
8825         g_em->width  = TILEX - cx * step;
8826         g_em->height = TILEY - cy * step;
8827       }
8828
8829       // create unique graphic identifier to decide if tile must be redrawn
8830       /* bit 31 - 16 (16 bit): EM style graphic
8831          bit 15 - 12 ( 4 bit): EM style frame
8832          bit 11 -  6 ( 6 bit): graphic width
8833          bit  5 -  0 ( 6 bit): graphic height */
8834       g_em->unique_identifier =
8835         (graphic << 16) | (frame << 12) | (g_em->width << 6) | g_em->height;
8836
8837 #if DEBUG_EM_GFX
8838
8839       // skip check for EMC elements not contained in original EMC artwork
8840       if (element == EL_EMC_FAKE_ACID)
8841         continue;
8842
8843       if (g_em->bitmap != debug_bitmap ||
8844           g_em->src_x != debug_src_x ||
8845           g_em->src_y != debug_src_y ||
8846           g_em->src_offset_x != 0 ||
8847           g_em->src_offset_y != 0 ||
8848           g_em->dst_offset_x != 0 ||
8849           g_em->dst_offset_y != 0 ||
8850           g_em->width != TILEX ||
8851           g_em->height != TILEY)
8852       {
8853         static int last_i = -1;
8854
8855         if (i != last_i)
8856         {
8857           printf("\n");
8858           last_i = i;
8859         }
8860
8861         printf("::: EMC GFX ERROR for element %d -> %d ('%s', '%s', %d)",
8862                i, element, element_info[element].token_name,
8863                element_action_info[effective_action].suffix, direction);
8864
8865         if (element != effective_element)
8866           printf(" [%d ('%s')]",
8867                  effective_element,
8868                  element_info[effective_element].token_name);
8869
8870         printf("\n");
8871
8872         if (g_em->bitmap != debug_bitmap)
8873           printf("    %d (%d): different bitmap! (0x%08x != 0x%08x)\n",
8874                  j, is_backside, (int)(g_em->bitmap), (int)(debug_bitmap));
8875
8876         if (g_em->src_x != debug_src_x ||
8877             g_em->src_y != debug_src_y)
8878           printf("    frame %d (%c): %d,%d (%d,%d) should be %d,%d (%d,%d)\n",
8879                  j, (is_backside ? 'B' : 'F'),
8880                  g_em->src_x, g_em->src_y,
8881                  g_em->src_x / 32, g_em->src_y / 32,
8882                  debug_src_x, debug_src_y,
8883                  debug_src_x / 32, debug_src_y / 32);
8884
8885         if (g_em->src_offset_x != 0 ||
8886             g_em->src_offset_y != 0 ||
8887             g_em->dst_offset_x != 0 ||
8888             g_em->dst_offset_y != 0)
8889           printf("    %d (%d): offsets %d,%d and %d,%d should be all 0\n",
8890                  j, is_backside,
8891                  g_em->src_offset_x, g_em->src_offset_y,
8892                  g_em->dst_offset_x, g_em->dst_offset_y);
8893
8894         if (g_em->width != TILEX ||
8895             g_em->height != TILEY)
8896           printf("    %d (%d): size %d,%d should be %d,%d\n",
8897                  j, is_backside,
8898                  g_em->width, g_em->height, TILEX, TILEY);
8899
8900         num_em_gfx_errors++;
8901       }
8902 #endif
8903
8904     }
8905   }
8906
8907   for (i = 0; i < TILE_MAX; i++)
8908   {
8909     for (j = 0; j < 8; j++)
8910     {
8911       int element = object_mapping[i].element_rnd;
8912       int action = object_mapping[i].action;
8913       int direction = object_mapping[i].direction;
8914       boolean is_backside = object_mapping[i].is_backside;
8915       int graphic_action  = el_act_dir2img(element, action, direction);
8916       int graphic_default = el_act_dir2img(element, ACTION_DEFAULT, direction);
8917
8918       if ((action == ACTION_SMASHED_BY_ROCK ||
8919            action == ACTION_SMASHED_BY_SPRING ||
8920            action == ACTION_EATING) &&
8921           graphic_action == graphic_default)
8922       {
8923         int e = (action == ACTION_SMASHED_BY_ROCK   ? Ystone_s  :
8924                  action == ACTION_SMASHED_BY_SPRING ? Yspring_s :
8925                  direction == MV_LEFT  ? (is_backside? Yspring_wB: Yspring_w) :
8926                  direction == MV_RIGHT ? (is_backside? Yspring_eB: Yspring_e) :
8927                  Xspring);
8928
8929         // no separate animation for "smashed by rock" -- use rock instead
8930         struct GraphicInfo_EM *g_em = &graphic_info_em_object[i][7 - j];
8931         struct GraphicInfo_EM *g_xx = &graphic_info_em_object[e][7 - j];
8932
8933         g_em->bitmap            = g_xx->bitmap;
8934         g_em->src_x             = g_xx->src_x;
8935         g_em->src_y             = g_xx->src_y;
8936         g_em->src_offset_x      = g_xx->src_offset_x;
8937         g_em->src_offset_y      = g_xx->src_offset_y;
8938         g_em->dst_offset_x      = g_xx->dst_offset_x;
8939         g_em->dst_offset_y      = g_xx->dst_offset_y;
8940         g_em->width             = g_xx->width;
8941         g_em->height            = g_xx->height;
8942         g_em->unique_identifier = g_xx->unique_identifier;
8943
8944         if (!is_backside)
8945           g_em->preserve_background = TRUE;
8946       }
8947     }
8948   }
8949
8950   for (p = 0; p < MAX_PLAYERS; p++)
8951   {
8952     for (i = 0; i < SPR_MAX; i++)
8953     {
8954       int element = player_mapping[p][i].element_rnd;
8955       int action = player_mapping[p][i].action;
8956       int direction = player_mapping[p][i].direction;
8957
8958       for (j = 0; j < 8; j++)
8959       {
8960         int effective_element = element;
8961         int effective_action = action;
8962         int graphic = (direction == MV_NONE ?
8963                        el_act2img(effective_element, effective_action) :
8964                        el_act_dir2img(effective_element, effective_action,
8965                                       direction));
8966         struct GraphicInfo *g = &graphic_info[graphic];
8967         struct GraphicInfo_EM *g_em = &graphic_info_em_player[p][i][7 - j];
8968         Bitmap *src_bitmap;
8969         int src_x, src_y;
8970         int sync_frame = j;
8971
8972 #if DEBUG_EM_GFX
8973         Bitmap *debug_bitmap = g_em->bitmap;
8974         int debug_src_x = g_em->src_x;
8975         int debug_src_y = g_em->src_y;
8976 #endif
8977
8978         int frame = getAnimationFrame(g->anim_frames,
8979                                       g->anim_delay,
8980                                       g->anim_mode,
8981                                       g->anim_start_frame,
8982                                       sync_frame);
8983
8984         getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y, FALSE);
8985
8986         g_em->bitmap = src_bitmap;
8987         g_em->src_x = src_x;
8988         g_em->src_y = src_y;
8989         g_em->src_offset_x = 0;
8990         g_em->src_offset_y = 0;
8991         g_em->dst_offset_x = 0;
8992         g_em->dst_offset_y = 0;
8993         g_em->width  = TILEX;
8994         g_em->height = TILEY;
8995
8996 #if DEBUG_EM_GFX
8997
8998         // skip check for EMC elements not contained in original EMC artwork
8999         if (element == EL_PLAYER_3 ||
9000             element == EL_PLAYER_4)
9001           continue;
9002
9003         if (g_em->bitmap != debug_bitmap ||
9004             g_em->src_x != debug_src_x ||
9005             g_em->src_y != debug_src_y)
9006         {
9007           static int last_i = -1;
9008
9009           if (i != last_i)
9010           {
9011             printf("\n");
9012             last_i = i;
9013           }
9014
9015           printf("::: EMC GFX ERROR for p/a %d/%d -> %d ('%s', '%s', %d)",
9016                  p, i, element, element_info[element].token_name,
9017                  element_action_info[effective_action].suffix, direction);
9018
9019           if (element != effective_element)
9020             printf(" [%d ('%s')]",
9021                    effective_element,
9022                    element_info[effective_element].token_name);
9023
9024           printf("\n");
9025
9026           if (g_em->bitmap != debug_bitmap)
9027             printf("    %d: different bitmap! (0x%08x != 0x%08x)\n",
9028                    j, (int)(g_em->bitmap), (int)(debug_bitmap));
9029
9030           if (g_em->src_x != debug_src_x ||
9031               g_em->src_y != debug_src_y)
9032             printf("    frame %d: %d,%d (%d,%d) should be %d,%d (%d,%d)\n",
9033                    j,
9034                    g_em->src_x, g_em->src_y,
9035                    g_em->src_x / 32, g_em->src_y / 32,
9036                    debug_src_x, debug_src_y,
9037                    debug_src_x / 32, debug_src_y / 32);
9038
9039           num_em_gfx_errors++;
9040         }
9041 #endif
9042
9043       }
9044     }
9045   }
9046
9047 #if DEBUG_EM_GFX
9048   printf("\n");
9049   printf("::: [%d errors found]\n", num_em_gfx_errors);
9050
9051   exit(0);
9052 #endif
9053 }
9054
9055 static void CheckSaveEngineSnapshot_EM(byte action[MAX_PLAYERS], int frame,
9056                                        boolean any_player_moving,
9057                                        boolean any_player_snapping,
9058                                        boolean any_player_dropping)
9059 {
9060   if (frame == 0 && !any_player_dropping)
9061   {
9062     if (!local_player->was_waiting)
9063     {
9064       if (!CheckSaveEngineSnapshotToList())
9065         return;
9066
9067       local_player->was_waiting = TRUE;
9068     }
9069   }
9070   else if (any_player_moving || any_player_snapping || any_player_dropping)
9071   {
9072     local_player->was_waiting = FALSE;
9073   }
9074 }
9075
9076 static void CheckSaveEngineSnapshot_SP(boolean murphy_is_waiting,
9077                                        boolean murphy_is_dropping)
9078 {
9079   if (murphy_is_waiting)
9080   {
9081     if (!local_player->was_waiting)
9082     {
9083       if (!CheckSaveEngineSnapshotToList())
9084         return;
9085
9086       local_player->was_waiting = TRUE;
9087     }
9088   }
9089   else
9090   {
9091     local_player->was_waiting = FALSE;
9092   }
9093 }
9094
9095 static void CheckSaveEngineSnapshot_MM(boolean element_clicked,
9096                                        boolean button_released)
9097 {
9098   if (button_released)
9099   {
9100     if (game.snapshot.mode == SNAPSHOT_MODE_EVERY_MOVE)
9101       CheckSaveEngineSnapshotToList();
9102   }
9103   else if (element_clicked)
9104   {
9105     if (game.snapshot.mode != SNAPSHOT_MODE_EVERY_MOVE)
9106       CheckSaveEngineSnapshotToList();
9107
9108     game.snapshot.changed_action = TRUE;
9109   }
9110 }
9111
9112 void CheckSingleStepMode_EM(byte action[MAX_PLAYERS], int frame,
9113                             boolean any_player_moving,
9114                             boolean any_player_snapping,
9115                             boolean any_player_dropping)
9116 {
9117   if (tape.single_step && tape.recording && !tape.pausing)
9118     if (frame == 0 && !any_player_dropping)
9119       TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
9120
9121   CheckSaveEngineSnapshot_EM(action, frame, any_player_moving,
9122                              any_player_snapping, any_player_dropping);
9123 }
9124
9125 void CheckSingleStepMode_SP(boolean murphy_is_waiting,
9126                             boolean murphy_is_dropping)
9127 {
9128   boolean murphy_starts_dropping = FALSE;
9129   int i;
9130
9131   for (i = 0; i < MAX_PLAYERS; i++)
9132     if (stored_player[i].force_dropping)
9133       murphy_starts_dropping = TRUE;
9134
9135   if (tape.single_step && tape.recording && !tape.pausing)
9136     if (murphy_is_waiting && !murphy_starts_dropping)
9137       TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
9138
9139   CheckSaveEngineSnapshot_SP(murphy_is_waiting, murphy_is_dropping);
9140 }
9141
9142 void CheckSingleStepMode_MM(boolean element_clicked,
9143                             boolean button_released)
9144 {
9145   if (tape.single_step && tape.recording && !tape.pausing)
9146     if (button_released)
9147       TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
9148
9149   CheckSaveEngineSnapshot_MM(element_clicked, button_released);
9150 }
9151
9152 void getGraphicSource_SP(struct GraphicInfo_SP *g_sp,
9153                          int graphic, int sync_frame, int x, int y)
9154 {
9155   int frame = getGraphicAnimationFrame(graphic, sync_frame);
9156
9157   getGraphicSource(graphic, frame, &g_sp->bitmap, &g_sp->src_x, &g_sp->src_y);
9158 }
9159
9160 boolean isNextAnimationFrame_SP(int graphic, int sync_frame)
9161 {
9162   return (IS_NEXT_FRAME(sync_frame, graphic));
9163 }
9164
9165 int getGraphicInfo_Delay(int graphic)
9166 {
9167   return graphic_info[graphic].anim_delay;
9168 }
9169
9170 void PlayMenuSoundExt(int sound)
9171 {
9172   if (sound == SND_UNDEFINED)
9173     return;
9174
9175   if ((!setup.sound_simple && !IS_LOOP_SOUND(sound)) ||
9176       (!setup.sound_loops && IS_LOOP_SOUND(sound)))
9177     return;
9178
9179   if (IS_LOOP_SOUND(sound))
9180     PlaySoundLoop(sound);
9181   else
9182     PlaySound(sound);
9183 }
9184
9185 void PlayMenuSound(void)
9186 {
9187   PlayMenuSoundExt(menu.sound[game_status]);
9188 }
9189
9190 void PlayMenuSoundStereo(int sound, int stereo_position)
9191 {
9192   if (sound == SND_UNDEFINED)
9193     return;
9194
9195   if ((!setup.sound_simple && !IS_LOOP_SOUND(sound)) ||
9196       (!setup.sound_loops && IS_LOOP_SOUND(sound)))
9197     return;
9198
9199   if (IS_LOOP_SOUND(sound))
9200     PlaySoundExt(sound, SOUND_MAX_VOLUME, stereo_position, SND_CTRL_PLAY_LOOP);
9201   else
9202     PlaySoundStereo(sound, stereo_position);
9203 }
9204
9205 void PlayMenuSoundIfLoopExt(int sound)
9206 {
9207   if (sound == SND_UNDEFINED)
9208     return;
9209
9210   if ((!setup.sound_simple && !IS_LOOP_SOUND(sound)) ||
9211       (!setup.sound_loops && IS_LOOP_SOUND(sound)))
9212     return;
9213
9214   if (IS_LOOP_SOUND(sound))
9215     PlaySoundLoop(sound);
9216 }
9217
9218 void PlayMenuSoundIfLoop(void)
9219 {
9220   PlayMenuSoundIfLoopExt(menu.sound[game_status]);
9221 }
9222
9223 void PlayMenuMusicExt(int music)
9224 {
9225   if (music == MUS_UNDEFINED)
9226     return;
9227
9228   if (!setup.sound_music)
9229     return;
9230
9231   if (IS_LOOP_MUSIC(music))
9232     PlayMusicLoop(music);
9233   else
9234     PlayMusic(music);
9235 }
9236
9237 void PlayMenuMusic(void)
9238 {
9239   char *curr_music = getCurrentlyPlayingMusicFilename();
9240   char *next_music = getMusicInfoEntryFilename(menu.music[game_status]);
9241
9242   if (!strEqual(curr_music, next_music))
9243     PlayMenuMusicExt(menu.music[game_status]);
9244 }
9245
9246 void PlayMenuSoundsAndMusic(void)
9247 {
9248   PlayMenuSound();
9249   PlayMenuMusic();
9250 }
9251
9252 static void FadeMenuSounds(void)
9253 {
9254   FadeSounds();
9255 }
9256
9257 static void FadeMenuMusic(void)
9258 {
9259   char *curr_music = getCurrentlyPlayingMusicFilename();
9260   char *next_music = getMusicInfoEntryFilename(menu.music[game_status]);
9261
9262   if (!strEqual(curr_music, next_music))
9263     FadeMusic();
9264 }
9265
9266 void FadeMenuSoundsAndMusic(void)
9267 {
9268   FadeMenuSounds();
9269   FadeMenuMusic();
9270 }
9271
9272 void PlaySoundActivating(void)
9273 {
9274 #if 0
9275   PlaySound(SND_MENU_ITEM_ACTIVATING);
9276 #endif
9277 }
9278
9279 void PlaySoundSelecting(void)
9280 {
9281 #if 0
9282   PlaySound(SND_MENU_ITEM_SELECTING);
9283 #endif
9284 }
9285
9286 void ToggleFullscreenOrChangeWindowScalingIfNeeded(void)
9287 {
9288   boolean change_fullscreen = (setup.fullscreen !=
9289                                video.fullscreen_enabled);
9290   boolean change_window_scaling_percent = (!video.fullscreen_enabled &&
9291                                            setup.window_scaling_percent !=
9292                                            video.window_scaling_percent);
9293
9294   if (change_window_scaling_percent && video.fullscreen_enabled)
9295     return;
9296
9297   if (!change_window_scaling_percent && !video.fullscreen_available)
9298     return;
9299
9300   if (change_window_scaling_percent)
9301   {
9302     SDLSetWindowScaling(setup.window_scaling_percent);
9303
9304     return;
9305   }
9306   else if (change_fullscreen)
9307   {
9308     SDLSetWindowFullscreen(setup.fullscreen);
9309
9310     // set setup value according to successfully changed fullscreen mode
9311     setup.fullscreen = video.fullscreen_enabled;
9312
9313     return;
9314   }
9315
9316   if (change_fullscreen ||
9317       change_window_scaling_percent)
9318   {
9319     Bitmap *tmp_backbuffer = CreateBitmap(WIN_XSIZE, WIN_YSIZE, DEFAULT_DEPTH);
9320
9321     // save backbuffer content which gets lost when toggling fullscreen mode
9322     BlitBitmap(backbuffer, tmp_backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
9323
9324     if (change_window_scaling_percent)
9325     {
9326       // keep window mode, but change window scaling
9327       video.fullscreen_enabled = TRUE;          // force new window scaling
9328     }
9329
9330     // toggle fullscreen
9331     ChangeVideoModeIfNeeded(setup.fullscreen);
9332
9333     // set setup value according to successfully changed fullscreen mode
9334     setup.fullscreen = video.fullscreen_enabled;
9335
9336     // restore backbuffer content from temporary backbuffer backup bitmap
9337     BlitBitmap(tmp_backbuffer, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
9338
9339     FreeBitmap(tmp_backbuffer);
9340
9341     // update visible window/screen
9342     BlitBitmap(backbuffer, window, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
9343   }
9344 }
9345
9346 static void JoinRectangles(int *x, int *y, int *width, int *height,
9347                            int x2, int y2, int width2, int height2)
9348 {
9349   // do not join with "off-screen" rectangle
9350   if (x2 == -1 || y2 == -1)
9351     return;
9352
9353   *x = MIN(*x, x2);
9354   *y = MIN(*y, y2);
9355   *width = MAX(*width, width2);
9356   *height = MAX(*height, height2);
9357 }
9358
9359 void SetAnimStatus(int anim_status_new)
9360 {
9361   if (anim_status_new == GAME_MODE_MAIN)
9362     anim_status_new = GAME_MODE_PSEUDO_MAINONLY;
9363   else if (anim_status_new == GAME_MODE_SCORES)
9364     anim_status_new = GAME_MODE_PSEUDO_SCORESOLD;
9365
9366   global.anim_status_next = anim_status_new;
9367
9368   // directly set screen modes that are entered without fading
9369   if ((global.anim_status      == GAME_MODE_PSEUDO_MAINONLY &&
9370        global.anim_status_next == GAME_MODE_PSEUDO_TYPENAME) ||
9371       (global.anim_status      == GAME_MODE_PSEUDO_TYPENAME &&
9372        global.anim_status_next == GAME_MODE_PSEUDO_MAINONLY))
9373     global.anim_status = global.anim_status_next;
9374 }
9375
9376 void SetGameStatus(int game_status_new)
9377 {
9378   if (game_status_new != game_status)
9379     game_status_last_screen = game_status;
9380
9381   game_status = game_status_new;
9382
9383   SetAnimStatus(game_status_new);
9384 }
9385
9386 void SetFontStatus(int game_status_new)
9387 {
9388   static int last_game_status = -1;
9389
9390   if (game_status_new != -1)
9391   {
9392     // set game status for font use after storing last game status
9393     last_game_status = game_status;
9394     game_status = game_status_new;
9395   }
9396   else
9397   {
9398     // reset game status after font use from last stored game status
9399     game_status = last_game_status;
9400   }
9401 }
9402
9403 void ResetFontStatus(void)
9404 {
9405   SetFontStatus(-1);
9406 }
9407
9408 void SetLevelSetInfo(char *identifier, int level_nr)
9409 {
9410   setString(&levelset.identifier, identifier);
9411
9412   levelset.level_nr = level_nr;
9413 }
9414
9415 boolean CheckIfAllViewportsHaveChanged(void)
9416 {
9417   // if game status has not changed, viewports have not changed either
9418   if (game_status == game_status_last)
9419     return FALSE;
9420
9421   // check if all viewports have changed with current game status
9422
9423   struct RectWithBorder *vp_playfield = &viewport.playfield[game_status];
9424   struct RectWithBorder *vp_door_1    = &viewport.door_1[game_status];
9425   struct RectWithBorder *vp_door_2    = &viewport.door_2[game_status];
9426   int new_real_sx       = vp_playfield->x;
9427   int new_real_sy       = vp_playfield->y;
9428   int new_full_sxsize   = vp_playfield->width;
9429   int new_full_sysize   = vp_playfield->height;
9430   int new_dx            = vp_door_1->x;
9431   int new_dy            = vp_door_1->y;
9432   int new_dxsize        = vp_door_1->width;
9433   int new_dysize        = vp_door_1->height;
9434   int new_vx            = vp_door_2->x;
9435   int new_vy            = vp_door_2->y;
9436   int new_vxsize        = vp_door_2->width;
9437   int new_vysize        = vp_door_2->height;
9438
9439   boolean playfield_viewport_has_changed =
9440     (new_real_sx != REAL_SX ||
9441      new_real_sy != REAL_SY ||
9442      new_full_sxsize != FULL_SXSIZE ||
9443      new_full_sysize != FULL_SYSIZE);
9444
9445   boolean door_1_viewport_has_changed =
9446     (new_dx != DX ||
9447      new_dy != DY ||
9448      new_dxsize != DXSIZE ||
9449      new_dysize != DYSIZE);
9450
9451   boolean door_2_viewport_has_changed =
9452     (new_vx != VX ||
9453      new_vy != VY ||
9454      new_vxsize != VXSIZE ||
9455      new_vysize != VYSIZE ||
9456      game_status_last == GAME_MODE_EDITOR);
9457
9458   return (playfield_viewport_has_changed &&
9459           door_1_viewport_has_changed &&
9460           door_2_viewport_has_changed);
9461 }
9462
9463 boolean CheckFadeAll(void)
9464 {
9465   return (CheckIfGlobalBorderHasChanged() ||
9466           CheckIfAllViewportsHaveChanged());
9467 }
9468
9469 void ChangeViewportPropertiesIfNeeded(void)
9470 {
9471   boolean use_mini_tilesize = (level.game_engine_type == GAME_ENGINE_TYPE_MM ?
9472                                FALSE : setup.small_game_graphics);
9473   int gfx_game_mode = game_status;
9474   int gfx_game_mode2 = (game_status == GAME_MODE_EDITOR ? GAME_MODE_DEFAULT :
9475                         game_status);
9476   struct RectWithBorder *vp_window    = &viewport.window[gfx_game_mode];
9477   struct RectWithBorder *vp_playfield = &viewport.playfield[gfx_game_mode];
9478   struct RectWithBorder *vp_door_1    = &viewport.door_1[gfx_game_mode];
9479   struct RectWithBorder *vp_door_2    = &viewport.door_2[gfx_game_mode2];
9480   struct RectWithBorder *vp_door_3    = &viewport.door_2[GAME_MODE_EDITOR];
9481   int new_win_xsize     = vp_window->width;
9482   int new_win_ysize     = vp_window->height;
9483   int border_left       = vp_playfield->border_left;
9484   int border_right      = vp_playfield->border_right;
9485   int border_top        = vp_playfield->border_top;
9486   int border_bottom     = vp_playfield->border_bottom;
9487   int new_sx            = vp_playfield->x      + border_left;
9488   int new_sy            = vp_playfield->y      + border_top;
9489   int new_sxsize        = vp_playfield->width  - border_left - border_right;
9490   int new_sysize        = vp_playfield->height - border_top  - border_bottom;
9491   int new_real_sx       = vp_playfield->x;
9492   int new_real_sy       = vp_playfield->y;
9493   int new_full_sxsize   = vp_playfield->width;
9494   int new_full_sysize   = vp_playfield->height;
9495   int new_dx            = vp_door_1->x;
9496   int new_dy            = vp_door_1->y;
9497   int new_dxsize        = vp_door_1->width;
9498   int new_dysize        = vp_door_1->height;
9499   int new_vx            = vp_door_2->x;
9500   int new_vy            = vp_door_2->y;
9501   int new_vxsize        = vp_door_2->width;
9502   int new_vysize        = vp_door_2->height;
9503   int new_ex            = vp_door_3->x;
9504   int new_ey            = vp_door_3->y;
9505   int new_exsize        = vp_door_3->width;
9506   int new_eysize        = vp_door_3->height;
9507   int new_tilesize_var = (use_mini_tilesize ? MINI_TILESIZE : game.tile_size);
9508   int tilesize = (gfx_game_mode == GAME_MODE_PLAYING ? new_tilesize_var :
9509                   gfx_game_mode == GAME_MODE_EDITOR ? MINI_TILESIZE : TILESIZE);
9510   int new_scr_fieldx = new_sxsize / tilesize;
9511   int new_scr_fieldy = new_sysize / tilesize;
9512   int new_scr_fieldx_buffers = new_sxsize / new_tilesize_var;
9513   int new_scr_fieldy_buffers = new_sysize / new_tilesize_var;
9514   boolean init_gfx_buffers = FALSE;
9515   boolean init_video_buffer = FALSE;
9516   boolean init_gadgets_and_anims = FALSE;
9517   boolean init_em_graphics = FALSE;
9518
9519   if (new_win_xsize != WIN_XSIZE ||
9520       new_win_ysize != WIN_YSIZE)
9521   {
9522     WIN_XSIZE = new_win_xsize;
9523     WIN_YSIZE = new_win_ysize;
9524
9525     init_video_buffer = TRUE;
9526     init_gfx_buffers = TRUE;
9527     init_gadgets_and_anims = TRUE;
9528
9529     // printf("::: video: init_video_buffer, init_gfx_buffers\n");
9530   }
9531
9532   if (new_scr_fieldx != SCR_FIELDX ||
9533       new_scr_fieldy != SCR_FIELDY)
9534   {
9535     // this always toggles between MAIN and GAME when using small tile size
9536
9537     SCR_FIELDX = new_scr_fieldx;
9538     SCR_FIELDY = new_scr_fieldy;
9539
9540     // printf("::: new_scr_fieldx != SCR_FIELDX ...\n");
9541   }
9542
9543   if (new_sx != SX ||
9544       new_sy != SY ||
9545       new_dx != DX ||
9546       new_dy != DY ||
9547       new_vx != VX ||
9548       new_vy != VY ||
9549       new_ex != EX ||
9550       new_ey != EY ||
9551       new_sxsize != SXSIZE ||
9552       new_sysize != SYSIZE ||
9553       new_dxsize != DXSIZE ||
9554       new_dysize != DYSIZE ||
9555       new_vxsize != VXSIZE ||
9556       new_vysize != VYSIZE ||
9557       new_exsize != EXSIZE ||
9558       new_eysize != EYSIZE ||
9559       new_real_sx != REAL_SX ||
9560       new_real_sy != REAL_SY ||
9561       new_full_sxsize != FULL_SXSIZE ||
9562       new_full_sysize != FULL_SYSIZE ||
9563       new_tilesize_var != TILESIZE_VAR
9564       )
9565   {
9566     // ------------------------------------------------------------------------
9567     // determine next fading area for changed viewport definitions
9568     // ------------------------------------------------------------------------
9569
9570     // start with current playfield area (default fading area)
9571     FADE_SX = REAL_SX;
9572     FADE_SY = REAL_SY;
9573     FADE_SXSIZE = FULL_SXSIZE;
9574     FADE_SYSIZE = FULL_SYSIZE;
9575
9576     // add new playfield area if position or size has changed
9577     if (new_real_sx != REAL_SX || new_real_sy != REAL_SY ||
9578         new_full_sxsize != FULL_SXSIZE || new_full_sysize != FULL_SYSIZE)
9579     {
9580       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9581                      new_real_sx, new_real_sy, new_full_sxsize,new_full_sysize);
9582     }
9583
9584     // add current and new door 1 area if position or size has changed
9585     if (new_dx != DX || new_dy != DY ||
9586         new_dxsize != DXSIZE || new_dysize != DYSIZE)
9587     {
9588       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9589                      DX, DY, DXSIZE, DYSIZE);
9590       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9591                      new_dx, new_dy, new_dxsize, new_dysize);
9592     }
9593
9594     // add current and new door 2 area if position or size has changed
9595     if (new_vx != VX || new_vy != VY ||
9596         new_vxsize != VXSIZE || new_vysize != VYSIZE)
9597     {
9598       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9599                      VX, VY, VXSIZE, VYSIZE);
9600       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9601                      new_vx, new_vy, new_vxsize, new_vysize);
9602     }
9603
9604     // ------------------------------------------------------------------------
9605     // handle changed tile size
9606     // ------------------------------------------------------------------------
9607
9608     if (new_tilesize_var != TILESIZE_VAR)
9609     {
9610       // printf("::: new_tilesize_var != TILESIZE_VAR\n");
9611
9612       // changing tile size invalidates scroll values of engine snapshots
9613       FreeEngineSnapshotSingle();
9614
9615       // changing tile size requires update of graphic mapping for EM engine
9616       init_em_graphics = TRUE;
9617     }
9618
9619     SX = new_sx;
9620     SY = new_sy;
9621     DX = new_dx;
9622     DY = new_dy;
9623     VX = new_vx;
9624     VY = new_vy;
9625     EX = new_ex;
9626     EY = new_ey;
9627     SXSIZE = new_sxsize;
9628     SYSIZE = new_sysize;
9629     DXSIZE = new_dxsize;
9630     DYSIZE = new_dysize;
9631     VXSIZE = new_vxsize;
9632     VYSIZE = new_vysize;
9633     EXSIZE = new_exsize;
9634     EYSIZE = new_eysize;
9635     REAL_SX = new_real_sx;
9636     REAL_SY = new_real_sy;
9637     FULL_SXSIZE = new_full_sxsize;
9638     FULL_SYSIZE = new_full_sysize;
9639     TILESIZE_VAR = new_tilesize_var;
9640
9641     init_gfx_buffers = TRUE;
9642     init_gadgets_and_anims = TRUE;
9643
9644     // printf("::: viewports: init_gfx_buffers\n");
9645     // printf("::: viewports: init_gadgets_and_anims\n");
9646   }
9647
9648   if (init_gfx_buffers)
9649   {
9650     // printf("::: init_gfx_buffers\n");
9651
9652     SCR_FIELDX = new_scr_fieldx_buffers;
9653     SCR_FIELDY = new_scr_fieldy_buffers;
9654
9655     InitGfxBuffers();
9656
9657     SCR_FIELDX = new_scr_fieldx;
9658     SCR_FIELDY = new_scr_fieldy;
9659
9660     SetDrawDeactivationMask(REDRAW_NONE);
9661     SetDrawBackgroundMask(REDRAW_FIELD);
9662   }
9663
9664   if (init_video_buffer)
9665   {
9666     // printf("::: init_video_buffer\n");
9667
9668     FreeAllImageTextures();     // needs old renderer to free the textures
9669
9670     InitVideoBuffer(WIN_XSIZE, WIN_YSIZE, DEFAULT_DEPTH, setup.fullscreen);
9671     InitImageTextures();
9672   }
9673
9674   if (init_gadgets_and_anims)
9675   {
9676     // printf("::: init_gadgets_and_anims\n");
9677
9678     InitGadgets();
9679     InitGlobalAnimations();
9680   }
9681
9682   if (init_em_graphics)
9683   {
9684       InitGraphicInfo_EM();
9685   }
9686 }