src/tools.c

   1 // ============================================================================
   2 // Rocks'n'Diamonds - McDuffin Strikes Back!
   3 // ----------------------------------------------------------------------------
   4 // (c) 1995-2014 by Artsoft Entertainment
   5 //                  Holger Schemel
   6 //                  info@artsoft.org
   7 //                  https://www.artsoft.org/
   8 // ----------------------------------------------------------------------------
   9 // tools.c
  10 // ============================================================================
  11
  12 #include <math.h>
  13
  14 #include "libgame/libgame.h"
  15
  16 #include "tools.h"
  17 #include "init.h"
  18 #include "game.h"
  19 #include "events.h"
  20 #include "anim.h"
  21 #include "network.h"
  22 #include "tape.h"
  23 #include "screens.h"
  24
  25
  26 #define DEBUG_FRAME_TIME        FALSE
  27
  28 // tool button identifiers
  29 #define TOOL_CTRL_ID_YES        0
  30 #define TOOL_CTRL_ID_NO         1
  31 #define TOOL_CTRL_ID_CONFIRM    2
  32 #define TOOL_CTRL_ID_PLAYER_1   3
  33 #define TOOL_CTRL_ID_PLAYER_2   4
  34 #define TOOL_CTRL_ID_PLAYER_3   5
  35 #define TOOL_CTRL_ID_PLAYER_4   6
  36 #define TOOL_CTRL_ID_TOUCH_YES  7
  37 #define TOOL_CTRL_ID_TOUCH_NO   8
  38 #define TOOL_CTRL_ID_TOUCH_CONFIRM 9
  39
  40 #define NUM_TOOL_BUTTONS        10
  41
  42 // constants for number of doors and door parts
  43 #define NUM_DOORS               2
  44 #define NUM_PANELS              NUM_DOORS
  45 // #define NUM_PANELS           0
  46 #define MAX_PARTS_PER_DOOR      8
  47 #define MAX_DOOR_PARTS          (NUM_DOORS * MAX_PARTS_PER_DOOR + NUM_PANELS)
  48 #define DOOR_PART_IS_PANEL(i)   ((i) >= NUM_DOORS * MAX_PARTS_PER_DOOR)
  49
  50
  51 struct DoorPartOrderInfo
  52 {
  53   int nr;
  54   int sort_priority;
  55 };
  56
  57 static struct DoorPartOrderInfo door_part_order[MAX_DOOR_PARTS];
  58
  59 struct DoorPartControlInfo
  60 {
  61   int door_token;
  62   int graphic;
  63   struct DoorPartPosInfo *pos;
  64 };
  65
  66 static struct DoorPartControlInfo door_part_controls[] =
  67 {
  68   {
  69     DOOR_1,
  70     IMG_GFX_DOOR_1_PART_1,
  71     &door_1.part_1
  72   },
  73   {
  74     DOOR_1,
  75     IMG_GFX_DOOR_1_PART_2,
  76     &door_1.part_2
  77   },
  78   {
  79     DOOR_1,
  80     IMG_GFX_DOOR_1_PART_3,
  81     &door_1.part_3
  82   },
  83   {
  84     DOOR_1,
  85     IMG_GFX_DOOR_1_PART_4,
  86     &door_1.part_4
  87   },
  88   {
  89     DOOR_1,
  90     IMG_GFX_DOOR_1_PART_5,
  91     &door_1.part_5
  92   },
  93   {
  94     DOOR_1,
  95     IMG_GFX_DOOR_1_PART_6,
  96     &door_1.part_6
  97   },
  98   {
  99     DOOR_1,
 100     IMG_GFX_DOOR_1_PART_7,
 101     &door_1.part_7
 102   },
 103   {
 104     DOOR_1,
 105     IMG_GFX_DOOR_1_PART_8,
 106     &door_1.part_8
 107   },
 108
 109   {
 110     DOOR_2,
 111     IMG_GFX_DOOR_2_PART_1,
 112     &door_2.part_1
 113   },
 114   {
 115     DOOR_2,
 116     IMG_GFX_DOOR_2_PART_2,
 117     &door_2.part_2
 118   },
 119   {
 120     DOOR_2,
 121     IMG_GFX_DOOR_2_PART_3,
 122     &door_2.part_3
 123   },
 124   {
 125     DOOR_2,
 126     IMG_GFX_DOOR_2_PART_4,
 127     &door_2.part_4
 128   },
 129   {
 130     DOOR_2,
 131     IMG_GFX_DOOR_2_PART_5,
 132     &door_2.part_5
 133   },
 134   {
 135     DOOR_2,
 136     IMG_GFX_DOOR_2_PART_6,
 137     &door_2.part_6
 138   },
 139   {
 140     DOOR_2,
 141     IMG_GFX_DOOR_2_PART_7,
 142     &door_2.part_7
 143   },
 144   {
 145     DOOR_2,
 146     IMG_GFX_DOOR_2_PART_8,
 147     &door_2.part_8
 148   },
 149
 150   {
 151     DOOR_1,
 152     IMG_BACKGROUND_PANEL,
 153     &door_1.panel
 154   },
 155   {
 156     DOOR_2,
 157     IMG_BACKGROUND_TAPE,
 158     &door_2.panel
 159   },
 160
 161   {
 162     -1,
 163     -1,
 164     NULL
 165   }
 166 };
 167
 168 static struct XY xy_topdown[] =
 169 {
 170   {  0, -1 },
 171   { -1,  0 },
 172   { +1,  0 },
 173   {  0, +1 }
 174 };
 175
 176
 177 // forward declaration for internal use
 178 static void MapToolButtons(unsigned int);
 179 static void UnmapToolButtons(void);
 180 static void HandleToolButtons(struct GadgetInfo *);
 181 static int el_act_dir2crm(int, int, int);
 182 static int el_act2crm(int, int);
 183
 184 static struct GadgetInfo *tool_gadget[NUM_TOOL_BUTTONS];
 185 static int request_gadget_id = -1;
 186
 187 static char *print_if_not_empty(int element)
 188 {
 189   static char *s = NULL;
 190   char *token_name = element_info[element].token_name;
 191
 192   if (s != NULL)
 193     free(s);
 194
 195   s = checked_malloc(strlen(token_name) + 10 + 1);
 196
 197   if (element != EL_EMPTY)
 198     sprintf(s, "%d\t['%s']", element, token_name);
 199   else
 200     sprintf(s, "%d", element);
 201
 202   return s;
 203 }
 204
 205 int getFieldbufferOffsetX_RND(int dir, int pos)
 206 {
 207   int full_lev_fieldx = lev_fieldx + (BorderElement != EL_EMPTY ? 2 : 0);
 208   int dx = (dir & MV_HORIZONTAL ? pos : 0);
 209   int dx_var = dx * TILESIZE_VAR / TILESIZE;
 210   int fx = FX;
 211
 212   if (EVEN(SCR_FIELDX))
 213   {
 214     int sbx_right = SBX_Right + (BorderElement != EL_EMPTY ? 1 : 0);
 215     int ffx = (scroll_x - SBX_Left) * TILEX_VAR + dx_var;
 216
 217     if (ffx < sbx_right * TILEX_VAR + TILEX_VAR / 2)
 218       fx += dx_var - MIN(ffx, TILEX_VAR / 2) + TILEX_VAR;
 219     else
 220       fx += (dx_var > 0 ? TILEX_VAR : 0);
 221   }
 222   else
 223   {
 224     fx += dx_var;
 225   }
 226
 227   if (full_lev_fieldx <= SCR_FIELDX)
 228   {
 229     if (EVEN(SCR_FIELDX))
 230       fx = 2 * TILEX_VAR - (ODD(lev_fieldx)  ? TILEX_VAR / 2 : 0);
 231     else
 232       fx = 2 * TILEX_VAR - (EVEN(lev_fieldx) ? TILEX_VAR / 2 : 0);
 233   }
 234
 235   return fx;
 236 }
 237
 238 int getFieldbufferOffsetY_RND(int dir, int pos)
 239 {
 240   int full_lev_fieldy = lev_fieldy + (BorderElement != EL_EMPTY ? 2 : 0);
 241   int dy = (dir & MV_VERTICAL ? pos : 0);
 242   int dy_var = dy * TILESIZE_VAR / TILESIZE;
 243   int fy = FY;
 244
 245   if (EVEN(SCR_FIELDY))
 246   {
 247     int sby_lower = SBY_Lower + (BorderElement != EL_EMPTY ? 1 : 0);
 248     int ffy = (scroll_y - SBY_Upper) * TILEY_VAR + dy_var;
 249
 250     if (ffy < sby_lower * TILEY_VAR + TILEY_VAR / 2)
 251       fy += dy_var - MIN(ffy, TILEY_VAR / 2) + TILEY_VAR;
 252     else
 253       fy += (dy_var > 0 ? TILEY_VAR : 0);
 254   }
 255   else
 256   {
 257     fy += dy_var;
 258   }
 259
 260   if (full_lev_fieldy <= SCR_FIELDY)
 261   {
 262     if (EVEN(SCR_FIELDY))
 263       fy = 2 * TILEY_VAR - (ODD(lev_fieldy)  ? TILEY_VAR / 2 : 0);
 264     else
 265       fy = 2 * TILEY_VAR - (EVEN(lev_fieldy) ? TILEY_VAR / 2 : 0);
 266   }
 267
 268   return fy;
 269 }
 270
 271 static int getLevelFromScreenX_RND(int sx)
 272 {
 273   int fx = getFieldbufferOffsetX_RND(ScreenMovDir, ScreenGfxPos);
 274   int dx = fx - FX;
 275   int px = sx - SX;
 276   int lx = LEVELX((px + dx) / TILESIZE_VAR);
 277
 278   return lx;
 279 }
 280
 281 static int getLevelFromScreenY_RND(int sy)
 282 {
 283   int fy = getFieldbufferOffsetY_RND(ScreenMovDir, ScreenGfxPos);
 284   int dy = fy - FY;
 285   int py = sy - SY;
 286   int ly = LEVELY((py + dy) / TILESIZE_VAR);
 287
 288   return ly;
 289 }
 290
 291 static int getLevelFromScreenX_EM(int sx)
 292 {
 293   int level_xsize = level.native_em_level->cav->width;
 294   int full_xsize = level_xsize * TILESIZE_VAR;
 295
 296   sx -= (full_xsize < SXSIZE ? (SXSIZE - full_xsize) / 2 : 0);
 297
 298   int fx = getFieldbufferOffsetX_EM();
 299   int dx = fx;
 300   int px = sx - SX;
 301   int lx = LEVELX((px + dx) / TILESIZE_VAR);
 302
 303   return lx;
 304 }
 305
 306 static int getLevelFromScreenY_EM(int sy)
 307 {
 308   int level_ysize = level.native_em_level->cav->height;
 309   int full_ysize = level_ysize * TILESIZE_VAR;
 310
 311   sy -= (full_ysize < SYSIZE ? (SYSIZE - full_ysize) / 2 : 0);
 312
 313   int fy = getFieldbufferOffsetY_EM();
 314   int dy = fy;
 315   int py = sy - SY;
 316   int ly = LEVELY((py + dy) / TILESIZE_VAR);
 317
 318   return ly;
 319 }
 320
 321 static int getLevelFromScreenX_SP(int sx)
 322 {
 323   int menBorder = setup.sp_show_border_elements;
 324   int level_xsize = level.native_sp_level->width;
 325   int full_xsize = (level_xsize - (menBorder ? 0 : 1)) * TILESIZE_VAR;
 326
 327   sx += (full_xsize < SXSIZE ? (SXSIZE - full_xsize) / 2 : 0);
 328
 329   int fx = getFieldbufferOffsetX_SP();
 330   int dx = fx - FX;
 331   int px = sx - SX;
 332   int lx = LEVELX((px + dx) / TILESIZE_VAR);
 333
 334   return lx;
 335 }
 336
 337 static int getLevelFromScreenY_SP(int sy)
 338 {
 339   int menBorder = setup.sp_show_border_elements;
 340   int level_ysize = level.native_sp_level->height;
 341   int full_ysize = (level_ysize - (menBorder ? 0 : 1)) * TILESIZE_VAR;
 342
 343   sy += (full_ysize < SYSIZE ? (SYSIZE - full_ysize) / 2 : 0);
 344
 345   int fy = getFieldbufferOffsetY_SP();
 346   int dy = fy - FY;
 347   int py = sy - SY;
 348   int ly = LEVELY((py + dy) / TILESIZE_VAR);
 349
 350   return ly;
 351 }
 352
 353 static int getLevelFromScreenX_MM(int sx)
 354 {
 355   int level_xsize = level.native_mm_level->fieldx;
 356   int full_xsize = level_xsize * TILESIZE_VAR;
 357
 358   sx -= (full_xsize < SXSIZE ? (SXSIZE - full_xsize) / 2 : 0);
 359
 360   int px = sx - SX;
 361   int lx = (px + TILESIZE_VAR) / TILESIZE_VAR - 1;
 362
 363   return lx;
 364 }
 365
 366 static int getLevelFromScreenY_MM(int sy)
 367 {
 368   int level_ysize = level.native_mm_level->fieldy;
 369   int full_ysize = level_ysize * TILESIZE_VAR;
 370
 371   sy -= (full_ysize < SYSIZE ? (SYSIZE - full_ysize) / 2 : 0);
 372
 373   int py = sy - SY;
 374   int ly = (py + TILESIZE_VAR) / TILESIZE_VAR - 1;
 375
 376   return ly;
 377 }
 378
 379 int getLevelFromScreenX(int x)
 380 {
 381   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 382     return getLevelFromScreenX_EM(x);
 383   if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 384     return getLevelFromScreenX_SP(x);
 385   if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 386     return getLevelFromScreenX_MM(x);
 387   else
 388     return getLevelFromScreenX_RND(x);
 389 }
 390
 391 int getLevelFromScreenY(int y)
 392 {
 393   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 394     return getLevelFromScreenY_EM(y);
 395   if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 396     return getLevelFromScreenY_SP(y);
 397   if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 398     return getLevelFromScreenY_MM(y);
 399   else
 400     return getLevelFromScreenY_RND(y);
 401 }
 402
 403 int getScreenFieldSizeX(void)
 404 {
 405   return (tape.playing ? tape.scr_fieldx : SCR_FIELDX);
 406 }
 407
 408 int getScreenFieldSizeY(void)
 409 {
 410   return (tape.playing ? tape.scr_fieldy : SCR_FIELDY);
 411 }
 412
 413 void DumpTile(int x, int y)
 414 {
 415   int sx = SCREENX(x);
 416   int sy = SCREENY(y);
 417   char *token_name;
 418
 419   Info("---");
 420   Info("Field Info: SCREEN(%d, %d), LEVEL(%d, %d)", sx, sy, x, y);
 421   Info("---");
 422
 423   if (!IN_LEV_FIELD(x, y))
 424   {
 425     Info("(not in level field)");
 426     Info("");
 427
 428     return;
 429   }
 430
 431   token_name = element_info[Tile[x][y]].token_name;
 432
 433   Info("Tile:        %d\t['%s']",       Tile[x][y], token_name);
 434   Info("Back:        %s",               print_if_not_empty(Back[x][y]));
 435   Info("Store:       %s",               print_if_not_empty(Store[x][y]));
 436   Info("Store2:      %s",               print_if_not_empty(Store2[x][y]));
 437   Info("StorePlayer: %s",               print_if_not_empty(StorePlayer[x][y]));
 438   Info("MovPos:      %d",               MovPos[x][y]);
 439   Info("MovDir:      %d",               MovDir[x][y]);
 440   Info("MovDelay:    %d",               MovDelay[x][y]);
 441   Info("ChangeDelay: %d",               ChangeDelay[x][y]);
 442   Info("CustomValue: %d",               CustomValue[x][y]);
 443   Info("GfxElement:  %d",               GfxElement[x][y]);
 444   Info("GfxAction:   %d",               GfxAction[x][y]);
 445   Info("GfxFrame:    %d [%d]",          GfxFrame[x][y], FrameCounter);
 446   Info("Player x/y:  %d, %d",           local_player->jx, local_player->jy);
 447   Info("");
 448 }
 449
 450 void DumpTileFromScreen(int sx, int sy)
 451 {
 452   int lx = getLevelFromScreenX(sx);
 453   int ly = getLevelFromScreenY(sy);
 454
 455   DumpTile(lx, ly);
 456 }
 457
 458 void SetDrawtoField(int mode)
 459 {
 460   if (mode == DRAW_TO_FIELDBUFFER)
 461   {
 462     FX = 2 * TILEX_VAR;
 463     FY = 2 * TILEY_VAR;
 464     BX1 = -2;
 465     BY1 = -2;
 466     BX2 = SCR_FIELDX + 1;
 467     BY2 = SCR_FIELDY + 1;
 468
 469     drawto_field = fieldbuffer;
 470   }
 471   else  // DRAW_TO_BACKBUFFER
 472   {
 473     FX = SX;
 474     FY = SY;
 475     BX1 = 0;
 476     BY1 = 0;
 477     BX2 = SCR_FIELDX - 1;
 478     BY2 = SCR_FIELDY - 1;
 479
 480     drawto_field = backbuffer;
 481   }
 482 }
 483
 484 int GetDrawtoField(void)
 485 {
 486   return (drawto_field == fieldbuffer ? DRAW_TO_FIELDBUFFER : DRAW_TO_BACKBUFFER);
 487 }
 488
 489 static void RedrawPlayfield_RND(void)
 490 {
 491   if (game.envelope_active)
 492     return;
 493
 494   DrawLevel(REDRAW_ALL);
 495   DrawAllPlayers();
 496 }
 497
 498 void RedrawPlayfield(void)
 499 {
 500   if (game_status != GAME_MODE_PLAYING)
 501     return;
 502
 503   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 504     RedrawPlayfield_EM(TRUE);
 505   else if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 506     RedrawPlayfield_SP(TRUE);
 507   else if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 508     RedrawPlayfield_MM();
 509   else if (level.game_engine_type == GAME_ENGINE_TYPE_RND)
 510     RedrawPlayfield_RND();
 511
 512   BlitScreenToBitmap(backbuffer);
 513
 514   BlitBitmap(drawto, window, gfx.sx, gfx.sy, gfx.sxsize, gfx.sysize,
 515              gfx.sx, gfx.sy);
 516 }
 517
 518 static void DrawMaskedBorderExt_Rect(int x, int y, int width, int height,
 519                                      int draw_target)
 520 {
 521   Bitmap *src_bitmap = getGlobalBorderBitmapFromStatus(global.border_status);
 522   Bitmap *dst_bitmap = gfx.masked_border_bitmap_ptr;
 523
 524   // may happen for "border.draw_masked.*" with undefined "global.border.*"
 525   if (src_bitmap == NULL)
 526     return;
 527
 528   if (x == -1 && y == -1)
 529     return;
 530
 531   if (draw_target == DRAW_TO_SCREEN)
 532     BlitToScreenMasked(src_bitmap, x, y, width, height, x, y);
 533   else
 534     BlitBitmapMasked(src_bitmap, dst_bitmap, x, y, width, height, x, y);
 535 }
 536
 537 static void DrawMaskedBorderExt_FIELD(int draw_target)
 538 {
 539   if (global.border_status >= GAME_MODE_MAIN &&
 540       global.border_status <= GAME_MODE_PLAYING &&
 541       border.draw_masked[global.border_status])
 542     DrawMaskedBorderExt_Rect(REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE,
 543                              draw_target);
 544 }
 545
 546 static void DrawMaskedBorderExt_DOOR_1(int draw_target)
 547 {
 548   // when drawing to backbuffer, never draw border over open doors
 549   if (draw_target == DRAW_TO_BACKBUFFER &&
 550       (GetDoorState() & DOOR_OPEN_1))
 551     return;
 552
 553   if (border.draw_masked[GFX_SPECIAL_ARG_DOOR] &&
 554       (global.border_status != GAME_MODE_EDITOR ||
 555        border.draw_masked[GFX_SPECIAL_ARG_EDITOR]))
 556     DrawMaskedBorderExt_Rect(DX, DY, DXSIZE, DYSIZE, draw_target);
 557 }
 558
 559 static void DrawMaskedBorderExt_DOOR_2(int draw_target)
 560 {
 561   // when drawing to backbuffer, never draw border over open doors
 562   if (draw_target == DRAW_TO_BACKBUFFER &&
 563       (GetDoorState() & DOOR_OPEN_2))
 564     return;
 565
 566   if (border.draw_masked[GFX_SPECIAL_ARG_DOOR] &&
 567       global.border_status != GAME_MODE_EDITOR)
 568     DrawMaskedBorderExt_Rect(VX, VY, VXSIZE, VYSIZE, draw_target);
 569 }
 570
 571 static void DrawMaskedBorderExt_DOOR_3(int draw_target)
 572 {
 573   // currently not available
 574 }
 575
 576 static void DrawMaskedBorderExt_ALL(int draw_target)
 577 {
 578   DrawMaskedBorderExt_FIELD(draw_target);
 579   DrawMaskedBorderExt_DOOR_1(draw_target);
 580   DrawMaskedBorderExt_DOOR_2(draw_target);
 581   DrawMaskedBorderExt_DOOR_3(draw_target);
 582 }
 583
 584 static void DrawMaskedBorderExt(int redraw_mask, int draw_target)
 585 {
 586   // never draw masked screen borders on borderless screens
 587   if (global.border_status == GAME_MODE_LOADING ||
 588       global.border_status == GAME_MODE_TITLE)
 589     return;
 590
 591   if (redraw_mask & REDRAW_ALL)
 592     DrawMaskedBorderExt_ALL(draw_target);
 593   else
 594   {
 595     if (redraw_mask & REDRAW_FIELD)
 596       DrawMaskedBorderExt_FIELD(draw_target);
 597     if (redraw_mask & REDRAW_DOOR_1)
 598       DrawMaskedBorderExt_DOOR_1(draw_target);
 599     if (redraw_mask & REDRAW_DOOR_2)
 600       DrawMaskedBorderExt_DOOR_2(draw_target);
 601     if (redraw_mask & REDRAW_DOOR_3)
 602       DrawMaskedBorderExt_DOOR_3(draw_target);
 603   }
 604 }
 605
 606 void DrawMaskedBorder_FIELD(void)
 607 {
 608   DrawMaskedBorderExt_FIELD(DRAW_TO_BACKBUFFER);
 609 }
 610
 611 void DrawMaskedBorder(int redraw_mask)
 612 {
 613   DrawMaskedBorderExt(redraw_mask, DRAW_TO_BACKBUFFER);
 614 }
 615
 616 void DrawMaskedBorderToTarget(int draw_target)
 617 {
 618   if (draw_target == DRAW_TO_BACKBUFFER ||
 619       draw_target == DRAW_TO_SCREEN)
 620   {
 621     DrawMaskedBorderExt(REDRAW_ALL, draw_target);
 622   }
 623   else
 624   {
 625     int last_border_status = global.border_status;
 626
 627     if (draw_target == DRAW_TO_FADE_SOURCE)
 628     {
 629       global.border_status = gfx.fade_border_source_status;
 630       gfx.masked_border_bitmap_ptr = gfx.fade_bitmap_source;
 631     }
 632     else if (draw_target == DRAW_TO_FADE_TARGET)
 633     {
 634       global.border_status = gfx.fade_border_target_status;
 635       gfx.masked_border_bitmap_ptr = gfx.fade_bitmap_target;
 636     }
 637
 638     // always use global border for PLAYING when restarting the game
 639     if (global.border_status == GAME_MODE_PSEUDO_RESTARTING)
 640       global.border_status = GAME_MODE_PLAYING;
 641
 642     DrawMaskedBorderExt(REDRAW_ALL, draw_target);
 643
 644     global.border_status = last_border_status;
 645     gfx.masked_border_bitmap_ptr = backbuffer;
 646   }
 647 }
 648
 649 void DrawTileCursor(int draw_target)
 650 {
 651   DrawTileCursor_MM(draw_target, game_status == GAME_MODE_PLAYING);
 652 }
 653
 654 void BlitScreenToBitmapExt_RND(Bitmap *target_bitmap, int fx, int fy)
 655 {
 656   BlitBitmap(drawto_field, target_bitmap, fx, fy, SXSIZE, SYSIZE, SX, SY);
 657 }
 658
 659 void BlitScreenToBitmap_RND(Bitmap *target_bitmap)
 660 {
 661   int fx = getFieldbufferOffsetX_RND(ScreenMovDir, ScreenGfxPos);
 662   int fy = getFieldbufferOffsetY_RND(ScreenMovDir, ScreenGfxPos);
 663
 664   BlitScreenToBitmapExt_RND(target_bitmap, fx, fy);
 665 }
 666
 667 void BlitScreenToBitmap(Bitmap *target_bitmap)
 668 {
 669   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
 670     BlitScreenToBitmap_EM(target_bitmap);
 671   else if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
 672     BlitScreenToBitmap_SP(target_bitmap);
 673   else if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
 674     BlitScreenToBitmap_MM(target_bitmap);
 675   else if (level.game_engine_type == GAME_ENGINE_TYPE_RND)
 676     BlitScreenToBitmap_RND(target_bitmap);
 677
 678   redraw_mask |= REDRAW_FIELD;
 679 }
 680
 681 static void DrawFramesPerSecond(void)
 682 {
 683   char text[100];
 684   int font_nr = FONT_TEXT_2;
 685   int font_width = getFontWidth(font_nr);
 686   int draw_deactivation_mask = GetDrawDeactivationMask();
 687   boolean draw_masked = (draw_deactivation_mask == REDRAW_NONE);
 688
 689   // draw FPS with leading space (needed if field buffer deactivated)
 690   sprintf(text, " %04.1f fps", global.frames_per_second);
 691
 692   // override draw deactivation mask (required for invisible warp mode)
 693   SetDrawDeactivationMask(REDRAW_NONE);
 694
 695   // draw opaque FPS if field buffer deactivated, else draw masked FPS
 696   DrawTextExt(backbuffer, SX + SXSIZE - font_width * strlen(text), SY, text,
 697               font_nr, (draw_masked ? BLIT_MASKED : BLIT_OPAQUE));
 698
 699   // set draw deactivation mask to previous value
 700   SetDrawDeactivationMask(draw_deactivation_mask);
 701
 702   // force full-screen redraw in this frame
 703   redraw_mask = REDRAW_ALL;
 704 }
 705
 706 #if DEBUG_FRAME_TIME
 707 static void PrintFrameTimeDebugging(void)
 708 {
 709   static unsigned int last_counter = 0;
 710   unsigned int counter = Counter();
 711   int diff_1 = counter - last_counter;
 712   int diff_2 = diff_1 - GAME_FRAME_DELAY;
 713   int diff_2_max = 20;
 714   int diff_2_cut = MIN(ABS(diff_2), diff_2_max);
 715   char diff_bar[2 * diff_2_max + 5];
 716   int pos = 0;
 717   int i;
 718
 719   diff_bar[pos++] = (diff_2 < -diff_2_max ? '<' : ' ');
 720
 721   for (i = 0; i < diff_2_max; i++)
 722     diff_bar[pos++] = (diff_2 >= 0 ? ' ' :
 723                        i >= diff_2_max - diff_2_cut ? '-' : ' ');
 724
 725   diff_bar[pos++] = '|';
 726
 727   for (i = 0; i < diff_2_max; i++)
 728     diff_bar[pos++] = (diff_2 <= 0 ? ' ' : i < diff_2_cut ? '+' : ' ');
 729
 730   diff_bar[pos++] = (diff_2 > diff_2_max ? '>' : ' ');
 731
 732   diff_bar[pos++] = '\0';
 733
 734   Debug("time:frame", "%06d [%02d] [%c%02d] %s",
 735         counter,
 736         diff_1,
 737         (diff_2 < 0 ? '-' : diff_2 > 0 ? '+' : ' '), ABS(diff_2),
 738         diff_bar);
 739
 740   last_counter = counter;
 741 }
 742 #endif
 743
 744 static int unifiedRedrawMask(int mask)
 745 {
 746   if (mask & REDRAW_ALL)
 747     return REDRAW_ALL;
 748
 749   if (mask & REDRAW_FIELD && mask & REDRAW_DOORS)
 750     return REDRAW_ALL;
 751
 752   return mask;
 753 }
 754
 755 static boolean equalRedrawMasks(int mask_1, int mask_2)
 756 {
 757   return unifiedRedrawMask(mask_1) == unifiedRedrawMask(mask_2);
 758 }
 759
 760 void BackToFront(void)
 761 {
 762   static int last_redraw_mask = REDRAW_NONE;
 763
 764   // force screen redraw in every frame to continue drawing global animations
 765   // (but always use the last redraw mask to prevent unwanted side effects)
 766   if (redraw_mask == REDRAW_NONE)
 767     redraw_mask = last_redraw_mask;
 768
 769   last_redraw_mask = redraw_mask;
 770
 771 #if 1
 772   // masked border now drawn immediately when blitting backbuffer to window
 773 #else
 774   // draw masked border to all viewports, if defined
 775   DrawMaskedBorder(redraw_mask);
 776 #endif
 777
 778   // draw frames per second (only if debug mode is enabled)
 779   if (redraw_mask & REDRAW_FPS)
 780     DrawFramesPerSecond();
 781
 782   // remove playfield redraw before potentially merging with doors redraw
 783   if (DrawingDeactivated(REAL_SX, REAL_SY))
 784     redraw_mask &= ~REDRAW_FIELD;
 785
 786   // redraw complete window if both playfield and (some) doors need redraw
 787   if (redraw_mask & REDRAW_FIELD && redraw_mask & REDRAW_DOORS)
 788     redraw_mask = REDRAW_ALL;
 789
 790   /* although redrawing the whole window would be fine for normal gameplay,
 791      being able to only redraw the playfield is required for deactivating
 792      certain drawing areas (mainly playfield) to work, which is needed for
 793      warp-forward to be fast enough (by skipping redraw of most frames) */
 794
 795   if (redraw_mask & REDRAW_ALL)
 796   {
 797     BlitBitmap(backbuffer, window, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
 798   }
 799   else if (redraw_mask & REDRAW_FIELD)
 800   {
 801     BlitBitmap(backbuffer, window,
 802                REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE, REAL_SX, REAL_SY);
 803   }
 804   else if (redraw_mask & REDRAW_DOORS)
 805   {
 806     // merge door areas to prevent calling screen redraw more than once
 807     int x1 = WIN_XSIZE;
 808     int y1 = WIN_YSIZE;
 809     int x2 = 0;
 810     int y2 = 0;
 811
 812     if (redraw_mask & REDRAW_DOOR_1)
 813     {
 814       x1 = MIN(x1, DX);
 815       y1 = MIN(y1, DY);
 816       x2 = MAX(x2, DX + DXSIZE);
 817       y2 = MAX(y2, DY + DYSIZE);
 818     }
 819
 820     if (redraw_mask & REDRAW_DOOR_2)
 821     {
 822       x1 = MIN(x1, VX);
 823       y1 = MIN(y1, VY);
 824       x2 = MAX(x2, VX + VXSIZE);
 825       y2 = MAX(y2, VY + VYSIZE);
 826     }
 827
 828     if (redraw_mask & REDRAW_DOOR_3)
 829     {
 830       x1 = MIN(x1, EX);
 831       y1 = MIN(y1, EY);
 832       x2 = MAX(x2, EX + EXSIZE);
 833       y2 = MAX(y2, EY + EYSIZE);
 834     }
 835
 836     // make sure that at least one pixel is blitted, and inside the screen
 837     // (else nothing is blitted, causing the animations not to be updated)
 838     x1 = MIN(MAX(0, x1), WIN_XSIZE - 1);
 839     y1 = MIN(MAX(0, y1), WIN_YSIZE - 1);
 840     x2 = MIN(MAX(1, x2), WIN_XSIZE);
 841     y2 = MIN(MAX(1, y2), WIN_YSIZE);
 842
 843     BlitBitmap(backbuffer, window, x1, y1, x2 - x1, y2 - y1, x1, y1);
 844   }
 845
 846   redraw_mask = REDRAW_NONE;
 847
 848 #if DEBUG_FRAME_TIME
 849   PrintFrameTimeDebugging();
 850 #endif
 851 }
 852
 853 void BackToFront_WithFrameDelay(unsigned int frame_delay_value)
 854 {
 855   unsigned int frame_delay_value_old = GetVideoFrameDelay();
 856
 857   SetVideoFrameDelay(frame_delay_value);
 858
 859   BackToFront();
 860
 861   SetVideoFrameDelay(frame_delay_value_old);
 862 }
 863
 864 static int fade_type_skip = FADE_TYPE_NONE;
 865
 866 static void FadeExt(int fade_mask, int fade_mode, int fade_type)
 867 {
 868   void (*draw_border_function)(void) = NULL;
 869   int x, y, width, height;
 870   int fade_delay, post_delay;
 871
 872   if (fade_type == FADE_TYPE_FADE_OUT)
 873   {
 874     if (fade_type_skip != FADE_TYPE_NONE)
 875     {
 876       // skip all fade operations until specified fade operation
 877       if (fade_type & fade_type_skip)
 878         fade_type_skip = FADE_TYPE_NONE;
 879
 880       return;
 881     }
 882
 883     if (fading.fade_mode & FADE_TYPE_TRANSFORM)
 884       return;
 885   }
 886
 887   redraw_mask |= fade_mask;
 888
 889   if (fade_type == FADE_TYPE_SKIP)
 890   {
 891     fade_type_skip = fade_mode;
 892
 893     return;
 894   }
 895
 896   fade_delay = fading.fade_delay;
 897   post_delay = (fade_mode == FADE_MODE_FADE_OUT ? fading.post_delay : 0);
 898
 899   if (fade_type_skip != FADE_TYPE_NONE)
 900   {
 901     // skip all fade operations until specified fade operation
 902     if (fade_type & fade_type_skip)
 903       fade_type_skip = FADE_TYPE_NONE;
 904
 905     fade_delay = 0;
 906   }
 907
 908   if (global.autoplay_leveldir)
 909   {
 910     return;
 911   }
 912
 913   if (fade_mask == REDRAW_FIELD)
 914   {
 915     x = FADE_SX;
 916     y = FADE_SY;
 917     width  = FADE_SXSIZE;
 918     height = FADE_SYSIZE;
 919
 920     if (border.draw_masked_when_fading)
 921       draw_border_function = DrawMaskedBorder_FIELD;    // update when fading
 922     else
 923       DrawMaskedBorder_FIELD();                         // draw once
 924   }
 925   else          // REDRAW_ALL
 926   {
 927     x = 0;
 928     y = 0;
 929     width  = WIN_XSIZE;
 930     height = WIN_YSIZE;
 931   }
 932
 933   // when switching screens without fading, set fade delay to zero
 934   if (!setup.fade_screens || fading.fade_mode == FADE_MODE_NONE)
 935     fade_delay = 0;
 936
 937   // do not display black frame when fading out without fade delay
 938   if (fade_mode == FADE_MODE_FADE_OUT && fade_delay == 0)
 939     return;
 940
 941   FadeRectangle(x, y, width, height, fade_mode, fade_delay, post_delay,
 942                 draw_border_function);
 943
 944   redraw_mask &= ~fade_mask;
 945
 946   ClearAutoRepeatKeyEvents();
 947 }
 948
 949 static void SetScreenStates_BeforeFadingIn(void)
 950 {
 951   // temporarily set screen mode for animations to screen after fading in
 952   global.anim_status = global.anim_status_next;
 953
 954   // store backbuffer with all animations that will be started after fading in
 955   PrepareFadeBitmap(DRAW_TO_FADE_TARGET);
 956
 957   // set screen mode for animations back to fading
 958   global.anim_status = GAME_MODE_PSEUDO_FADING;
 959 }
 960
 961 static void SetScreenStates_AfterFadingIn(void)
 962 {
 963   // store new source screen (to use correct masked border for fading)
 964   gfx.fade_border_source_status = global.border_status;
 965
 966   global.anim_status = global.anim_status_next;
 967 }
 968
 969 static void SetScreenStates_BeforeFadingOut(void)
 970 {
 971   // store new target screen (to use correct masked border for fading)
 972   gfx.fade_border_target_status = game_status;
 973
 974   // set screen mode for animations to fading
 975   global.anim_status = GAME_MODE_PSEUDO_FADING;
 976
 977   // store backbuffer with all animations that will be stopped for fading out
 978   PrepareFadeBitmap(DRAW_TO_FADE_SOURCE);
 979 }
 980
 981 static void SetScreenStates_AfterFadingOut(void)
 982 {
 983   global.border_status = game_status;
 984
 985   // always use global border for PLAYING when restarting the game
 986   if (global.border_status == GAME_MODE_PSEUDO_RESTARTING)
 987     global.border_status = GAME_MODE_PLAYING;
 988 }
 989
 990 void FadeIn(int fade_mask)
 991 {
 992   SetScreenStates_BeforeFadingIn();
 993
 994 #if 1
 995   DrawMaskedBorder(REDRAW_ALL);
 996 #endif
 997
 998   if (fading.fade_mode & FADE_TYPE_TRANSFORM)
 999     FadeExt(fade_mask, fading.fade_mode, FADE_TYPE_FADE_IN);
1000   else
1001     FadeExt(fade_mask, FADE_MODE_FADE_IN, FADE_TYPE_FADE_IN);
1002
1003   FADE_SX = REAL_SX;
1004   FADE_SY = REAL_SY;
1005   FADE_SXSIZE = FULL_SXSIZE;
1006   FADE_SYSIZE = FULL_SYSIZE;
1007
1008   // activate virtual buttons depending on upcoming game status
1009   if (strEqual(setup.touch.control_type, TOUCH_CONTROL_VIRTUAL_BUTTONS) &&
1010       game_status == GAME_MODE_PLAYING && !tape.playing)
1011     SetOverlayActive(TRUE);
1012
1013   SetScreenStates_AfterFadingIn();
1014
1015   // force update of global animation status in case of rapid screen changes
1016   redraw_mask = REDRAW_ALL;
1017   BackToFront();
1018 }
1019
1020 void FadeOut(int fade_mask)
1021 {
1022   // update screen if areas covered by "fade_mask" and "redraw_mask" differ
1023   if (!equalRedrawMasks(fade_mask, redraw_mask) &&
1024       fade_type_skip != FADE_MODE_SKIP_FADE_OUT)
1025     BackToFront();
1026
1027   SetScreenStates_BeforeFadingOut();
1028
1029   SetTileCursorActive(FALSE);
1030   SetOverlayActive(FALSE);
1031
1032 #if 0
1033   DrawMaskedBorder(REDRAW_ALL);
1034 #endif
1035
1036   if (fading.fade_mode & FADE_TYPE_TRANSFORM)
1037     FadeExt(fade_mask, fading.fade_mode, FADE_TYPE_FADE_OUT);
1038   else
1039     FadeExt(fade_mask, FADE_MODE_FADE_OUT, FADE_TYPE_FADE_OUT);
1040
1041   SetScreenStates_AfterFadingOut();
1042 }
1043
1044 static void FadeSetLeaveNext(struct TitleFadingInfo fading_leave, boolean set)
1045 {
1046   static struct TitleFadingInfo fading_leave_stored;
1047
1048   if (set)
1049     fading_leave_stored = fading_leave;
1050   else
1051     fading = fading_leave_stored;
1052 }
1053
1054 void FadeSetEnterMenu(void)
1055 {
1056   fading = menu.enter_menu;
1057
1058   FadeSetLeaveNext(fading, TRUE);       // (keep same fade mode)
1059 }
1060
1061 void FadeSetLeaveMenu(void)
1062 {
1063   fading = menu.leave_menu;
1064
1065   FadeSetLeaveNext(fading, TRUE);       // (keep same fade mode)
1066 }
1067
1068 void FadeSetEnterScreen(void)
1069 {
1070   fading = menu.enter_screen[game_status];
1071
1072   FadeSetLeaveNext(menu.leave_screen[game_status], TRUE);       // store
1073 }
1074
1075 void FadeSetNextScreen(void)
1076 {
1077   fading = menu.next_screen[game_status];
1078
1079   // (do not overwrite fade mode set by FadeSetEnterScreen)
1080   // FadeSetLeaveNext(fading, TRUE);    // (keep same fade mode)
1081 }
1082
1083 void FadeSetLeaveScreen(void)
1084 {
1085   FadeSetLeaveNext(menu.leave_screen[game_status], FALSE);      // recall
1086 }
1087
1088 void FadeSetFromType(int type)
1089 {
1090   if (type & TYPE_ENTER_SCREEN)
1091     FadeSetEnterScreen();
1092   else if (type & TYPE_ENTER)
1093     FadeSetEnterMenu();
1094   else if (type & TYPE_LEAVE)
1095     FadeSetLeaveMenu();
1096 }
1097
1098 void FadeSetDisabled(void)
1099 {
1100   static struct TitleFadingInfo fading_none = { FADE_MODE_NONE, -1, -1, -1 };
1101
1102   fading = fading_none;
1103 }
1104
1105 void FadeSkipNextFadeIn(void)
1106 {
1107   FadeExt(0, FADE_MODE_SKIP_FADE_IN, FADE_TYPE_SKIP);
1108 }
1109
1110 void FadeSkipNextFadeOut(void)
1111 {
1112   FadeExt(0, FADE_MODE_SKIP_FADE_OUT, FADE_TYPE_SKIP);
1113 }
1114
1115 static int getGlobalGameStatus(int status)
1116 {
1117   return (status == GAME_MODE_PSEUDO_TYPENAME ? GAME_MODE_MAIN :
1118           status == GAME_MODE_SCOREINFO       ? GAME_MODE_SCORES :
1119           status);
1120 }
1121
1122 int getImageFromGraphicOrDefault(int graphic, int default_graphic)
1123 {
1124   if (graphic == IMG_UNDEFINED)
1125     return IMG_UNDEFINED;
1126
1127   boolean redefined = getImageListEntryFromImageID(graphic)->redefined;
1128
1129   return (graphic_info[graphic].bitmap != NULL || redefined ?
1130           graphic : default_graphic);
1131 }
1132
1133 static int getBackgroundImage(int graphic)
1134 {
1135   return getImageFromGraphicOrDefault(graphic, IMG_BACKGROUND);
1136 }
1137
1138 static int getGlobalBorderImage(int graphic)
1139 {
1140   return getImageFromGraphicOrDefault(graphic, IMG_GLOBAL_BORDER);
1141 }
1142
1143 Bitmap *getGlobalBorderBitmapFromStatus(int status_raw)
1144 {
1145   int status = getGlobalGameStatus(status_raw);
1146   int graphic =
1147     (status == GAME_MODE_MAIN    ? IMG_GLOBAL_BORDER_MAIN :
1148      status == GAME_MODE_SCORES  ? IMG_GLOBAL_BORDER_SCORES :
1149      status == GAME_MODE_EDITOR  ? IMG_GLOBAL_BORDER_EDITOR :
1150      status == GAME_MODE_PLAYING ? IMG_GLOBAL_BORDER_PLAYING :
1151      IMG_GLOBAL_BORDER);
1152   int graphic_final = getGlobalBorderImage(graphic);
1153
1154   return graphic_info[graphic_final].bitmap;
1155 }
1156
1157 void SetBackgroundImage(int graphic, int redraw_mask)
1158 {
1159   struct GraphicInfo *g = &graphic_info[graphic];
1160   struct GraphicInfo g_undefined = { 0 };
1161
1162   if (graphic == IMG_UNDEFINED)
1163     g = &g_undefined;
1164
1165   // always use original size bitmap for backgrounds, if existing
1166   Bitmap *bitmap = (g->bitmaps != NULL &&
1167                     g->bitmaps[IMG_BITMAP_PTR_ORIGINAL] != NULL ?
1168                     g->bitmaps[IMG_BITMAP_PTR_ORIGINAL] : g->bitmap);
1169
1170   // remove every mask before setting mask for window, and
1171   // remove window area mask before setting mask for main or door area
1172   int remove_mask = (redraw_mask == REDRAW_ALL ? 0xffff : REDRAW_ALL);
1173
1174   // (!!! TO BE FIXED: The whole REDRAW_* system really sucks! !!!)
1175   SetBackgroundBitmap(NULL, remove_mask, 0, 0, 0, 0);   // !!! FIX THIS !!!
1176   SetBackgroundBitmap(bitmap, redraw_mask,
1177                       g->src_x, g->src_y,
1178                       g->width, g->height);
1179 }
1180
1181 void SetWindowBackgroundImageIfDefined(int graphic)
1182 {
1183   if (graphic_info[graphic].bitmap)
1184     SetBackgroundImage(graphic, REDRAW_ALL);
1185 }
1186
1187 void SetMainBackgroundImageIfDefined(int graphic)
1188 {
1189   if (graphic_info[graphic].bitmap)
1190     SetBackgroundImage(graphic, REDRAW_FIELD);
1191 }
1192
1193 void SetDoorBackgroundImageIfDefined(int graphic)
1194 {
1195   if (graphic_info[graphic].bitmap)
1196     SetBackgroundImage(graphic, REDRAW_DOOR_1);
1197 }
1198
1199 void SetWindowBackgroundImage(int graphic)
1200 {
1201   SetBackgroundImage(getBackgroundImage(graphic), REDRAW_ALL);
1202 }
1203
1204 void SetMainBackgroundImage(int graphic)
1205 {
1206   SetBackgroundImage(getBackgroundImage(graphic), REDRAW_FIELD);
1207 }
1208
1209 void SetDoorBackgroundImage(int graphic)
1210 {
1211   SetBackgroundImage(getBackgroundImage(graphic), REDRAW_DOOR_1);
1212 }
1213
1214 void SetPanelBackground(void)
1215 {
1216   SetDoorBackgroundImage(IMG_BACKGROUND_PANEL);
1217 }
1218
1219 void DrawBackground(int x, int y, int width, int height)
1220 {
1221   // "drawto" might still point to playfield buffer here (hall of fame)
1222   ClearRectangleOnBackground(backbuffer, x, y, width, height);
1223
1224   if (IN_GFX_FIELD_FULL(x, y))
1225     redraw_mask |= REDRAW_FIELD;
1226   else if (IN_GFX_DOOR_1(x, y))
1227     redraw_mask |= REDRAW_DOOR_1;
1228   else if (IN_GFX_DOOR_2(x, y))
1229     redraw_mask |= REDRAW_DOOR_2;
1230   else if (IN_GFX_DOOR_3(x, y))
1231     redraw_mask |= REDRAW_DOOR_3;
1232 }
1233
1234 void DrawBackgroundForFont(int x, int y, int width, int height, int font_nr)
1235 {
1236   struct FontBitmapInfo *font = getFontBitmapInfo(font_nr);
1237
1238   if (font->bitmap == NULL)
1239     return;
1240
1241   DrawBackground(x, y, width, height);
1242 }
1243
1244 void DrawBackgroundForGraphic(int x, int y, int width, int height, int graphic)
1245 {
1246   struct GraphicInfo *g = &graphic_info[graphic];
1247
1248   if (g->bitmap == NULL)
1249     return;
1250
1251   DrawBackground(x, y, width, height);
1252 }
1253
1254 static int game_status_last = -1;
1255 static Bitmap *global_border_bitmap_last = NULL;
1256 static Bitmap *global_border_bitmap = NULL;
1257 static int real_sx_last = -1, real_sy_last = -1;
1258 static int full_sxsize_last = -1, full_sysize_last = -1;
1259 static int dx_last = -1, dy_last = -1;
1260 static int dxsize_last = -1, dysize_last = -1;
1261 static int vx_last = -1, vy_last = -1;
1262 static int vxsize_last = -1, vysize_last = -1;
1263 static int ex_last = -1, ey_last = -1;
1264 static int exsize_last = -1, eysize_last = -1;
1265
1266 boolean CheckIfGlobalBorderHasChanged(void)
1267 {
1268   // if game status has not changed, global border has not changed either
1269   if (game_status == game_status_last)
1270     return FALSE;
1271
1272   // determine and store new global border bitmap for current game status
1273   global_border_bitmap = getGlobalBorderBitmapFromStatus(game_status);
1274
1275   return (global_border_bitmap_last != global_border_bitmap);
1276 }
1277
1278 #define ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED             0
1279
1280 #if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
1281 static boolean CheckIfGlobalBorderRedrawIsNeeded(void)
1282 {
1283   // if game status has not changed, nothing has to be redrawn
1284   if (game_status == game_status_last)
1285     return FALSE;
1286
1287   // redraw if last screen was title screen
1288   if (game_status_last == GAME_MODE_TITLE)
1289     return TRUE;
1290
1291   // redraw if global screen border has changed
1292   if (CheckIfGlobalBorderHasChanged())
1293     return TRUE;
1294
1295   // redraw if position or size of playfield area has changed
1296   if (real_sx_last != REAL_SX || real_sy_last != REAL_SY ||
1297       full_sxsize_last != FULL_SXSIZE || full_sysize_last != FULL_SYSIZE)
1298     return TRUE;
1299
1300   // redraw if position or size of door area has changed
1301   if (dx_last != DX || dy_last != DY ||
1302       dxsize_last != DXSIZE || dysize_last != DYSIZE)
1303     return TRUE;
1304
1305   // redraw if position or size of tape area has changed
1306   if (vx_last != VX || vy_last != VY ||
1307       vxsize_last != VXSIZE || vysize_last != VYSIZE)
1308     return TRUE;
1309
1310   // redraw if position or size of editor area has changed
1311   if (ex_last != EX || ey_last != EY ||
1312       exsize_last != EXSIZE || eysize_last != EYSIZE)
1313     return TRUE;
1314
1315   return FALSE;
1316 }
1317 #endif
1318
1319 static void RedrawGlobalBorderFromBitmap(Bitmap *bitmap)
1320 {
1321   if (bitmap)
1322     BlitBitmap(bitmap, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
1323   else
1324     ClearRectangle(backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE);
1325 }
1326
1327 void RedrawGlobalBorder(void)
1328 {
1329   Bitmap *bitmap = getGlobalBorderBitmapFromStatus(game_status);
1330
1331   RedrawGlobalBorderFromBitmap(bitmap);
1332
1333   redraw_mask = REDRAW_ALL;
1334 }
1335
1336 static void RedrawGlobalBorderIfNeeded(void)
1337 {
1338 #if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
1339   if (game_status == game_status_last)
1340     return;
1341 #endif
1342
1343   // copy current draw buffer to later copy back areas that have not changed
1344   if (game_status_last != GAME_MODE_TITLE)
1345     BlitBitmap(backbuffer, bitmap_db_store_1, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
1346
1347 #if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
1348   if (CheckIfGlobalBorderRedrawIsNeeded())
1349 #else
1350   // determine and store new global border bitmap for current game status
1351   global_border_bitmap = getGlobalBorderBitmapFromStatus(game_status);
1352 #endif
1353   {
1354     // redraw global screen border (or clear, if defined to be empty)
1355     RedrawGlobalBorderFromBitmap(global_border_bitmap);
1356
1357     if (game_status == GAME_MODE_EDITOR)
1358       DrawSpecialEditorDoor();
1359
1360     // copy previous playfield and door areas, if they are defined on both
1361     // previous and current screen and if they still have the same size
1362
1363     if (real_sx_last != -1 && real_sy_last != -1 &&
1364         REAL_SX != -1 && REAL_SY != -1 &&
1365         full_sxsize_last == FULL_SXSIZE && full_sysize_last == FULL_SYSIZE)
1366       BlitBitmap(bitmap_db_store_1, backbuffer,
1367                  real_sx_last, real_sy_last, FULL_SXSIZE, FULL_SYSIZE,
1368                  REAL_SX, REAL_SY);
1369
1370     if (dx_last != -1 && dy_last != -1 &&
1371         DX != -1 && DY != -1 &&
1372         dxsize_last == DXSIZE && dysize_last == DYSIZE)
1373       BlitBitmap(bitmap_db_store_1, backbuffer,
1374                  dx_last, dy_last, DXSIZE, DYSIZE, DX, DY);
1375
1376     if (game_status != GAME_MODE_EDITOR)
1377     {
1378       if (vx_last != -1 && vy_last != -1 &&
1379           VX != -1 && VY != -1 &&
1380           vxsize_last == VXSIZE && vysize_last == VYSIZE)
1381         BlitBitmap(bitmap_db_store_1, backbuffer,
1382                    vx_last, vy_last, VXSIZE, VYSIZE, VX, VY);
1383     }
1384     else
1385     {
1386       if (ex_last != -1 && ey_last != -1 &&
1387           EX != -1 && EY != -1 &&
1388           exsize_last == EXSIZE && eysize_last == EYSIZE)
1389         BlitBitmap(bitmap_db_store_1, backbuffer,
1390                    ex_last, ey_last, EXSIZE, EYSIZE, EX, EY);
1391     }
1392
1393     redraw_mask = REDRAW_ALL;
1394   }
1395
1396   game_status_last = game_status;
1397
1398   global_border_bitmap_last = global_border_bitmap;
1399
1400   real_sx_last = REAL_SX;
1401   real_sy_last = REAL_SY;
1402   full_sxsize_last = FULL_SXSIZE;
1403   full_sysize_last = FULL_SYSIZE;
1404   dx_last = DX;
1405   dy_last = DY;
1406   dxsize_last = DXSIZE;
1407   dysize_last = DYSIZE;
1408   vx_last = VX;
1409   vy_last = VY;
1410   vxsize_last = VXSIZE;
1411   vysize_last = VYSIZE;
1412   ex_last = EX;
1413   ey_last = EY;
1414   exsize_last = EXSIZE;
1415   eysize_last = EYSIZE;
1416 }
1417
1418 void ClearField(void)
1419 {
1420   RedrawGlobalBorderIfNeeded();
1421
1422   // !!! "drawto" might still point to playfield buffer here (see above) !!!
1423   // (when entering hall of fame after playing)
1424   DrawBackground(REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE);
1425
1426   // !!! maybe this should be done before clearing the background !!!
1427   if (game_status == GAME_MODE_PLAYING)
1428   {
1429     ClearRectangle(fieldbuffer, 0, 0, FXSIZE, FYSIZE);
1430     SetDrawtoField(DRAW_TO_FIELDBUFFER);
1431   }
1432   else
1433   {
1434     SetDrawtoField(DRAW_TO_BACKBUFFER);
1435   }
1436 }
1437
1438 void MarkTileDirty(int x, int y)
1439 {
1440   redraw_mask |= REDRAW_FIELD;
1441 }
1442
1443 void SetBorderElement(void)
1444 {
1445   int x, y;
1446
1447   BorderElement = EL_EMPTY;
1448
1449   // only the R'n'D game engine may use an additional steelwall border
1450   if (level.game_engine_type != GAME_ENGINE_TYPE_RND)
1451     return;
1452
1453   for (y = 0; y < lev_fieldy && BorderElement == EL_EMPTY; y++)
1454   {
1455     for (x = 0; x < lev_fieldx; x++)
1456     {
1457       if (!IS_INDESTRUCTIBLE(Tile[x][y]))
1458         BorderElement = EL_STEELWALL;
1459
1460       if (y != 0 && y != lev_fieldy - 1 && x != lev_fieldx - 1)
1461         x = lev_fieldx - 2;
1462     }
1463   }
1464 }
1465
1466 void FloodFillLevelExt(int start_x, int start_y, int fill_element,
1467                        int max_array_fieldx, int max_array_fieldy,
1468                        short field[max_array_fieldx][max_array_fieldy],
1469                        int max_fieldx, int max_fieldy)
1470 {
1471   static struct XY stack_buffer[MAX_LEV_FIELDX * MAX_LEV_FIELDY];
1472   struct XY *check = xy_topdown;
1473   int old_element = field[start_x][start_y];
1474   int stack_pos = 0;
1475
1476   // do nothing if start field already has the desired content
1477   if (old_element == fill_element)
1478     return;
1479
1480   stack_buffer[stack_pos++] = (struct XY){ start_x, start_y };
1481
1482   while (stack_pos > 0)
1483   {
1484     struct XY current = stack_buffer[--stack_pos];
1485     int i;
1486
1487     field[current.x][current.y] = fill_element;
1488
1489     for (i = 0; i < 4; i++)
1490     {
1491       int x = current.x + check[i].x;
1492       int y = current.y + check[i].y;
1493
1494       // check for stack buffer overflow (should not happen)
1495       if (stack_pos >= MAX_LEV_FIELDX * MAX_LEV_FIELDY)
1496         Fail("Stack buffer overflow in 'FloodFillLevelExt()'. Please debug.");
1497
1498       if (IN_FIELD(x, y, max_fieldx, max_fieldy) && field[x][y] == old_element)
1499         stack_buffer[stack_pos++] = (struct XY){ x, y };
1500     }
1501   }
1502 }
1503
1504 void FloodFillLevel(int from_x, int from_y, int fill_element,
1505                     short field[MAX_LEV_FIELDX][MAX_LEV_FIELDY],
1506                     int max_fieldx, int max_fieldy)
1507 {
1508   FloodFillLevelExt(from_x, from_y, fill_element,
1509                     MAX_LEV_FIELDX, MAX_LEV_FIELDY, field,
1510                     max_fieldx, max_fieldy);
1511 }
1512
1513 void SetRandomAnimationValue(int x, int y)
1514 {
1515   gfx.anim_random_frame = GfxRandom[x][y];
1516 }
1517
1518 int getGraphicAnimationFrame(int graphic, int sync_frame)
1519 {
1520   // animation synchronized with global frame counter, not move position
1521   if (graphic_info[graphic].anim_global_sync || sync_frame < 0)
1522     sync_frame = FrameCounter;
1523   else if (graphic_info[graphic].anim_global_anim_sync)
1524     sync_frame = getGlobalAnimSyncFrame();
1525
1526   return getAnimationFrame(graphic_info[graphic].anim_frames,
1527                            graphic_info[graphic].anim_delay,
1528                            graphic_info[graphic].anim_mode,
1529                            graphic_info[graphic].anim_start_frame,
1530                            sync_frame);
1531 }
1532
1533 int getGraphicAnimationFrameXY(int graphic, int lx, int ly)
1534 {
1535   if (graphic_info[graphic].anim_mode & ANIM_TILED)
1536   {
1537     struct GraphicInfo *g = &graphic_info[graphic];
1538     int xsize = MAX(1, g->anim_frames_per_line);
1539     int ysize = MAX(1, g->anim_frames / xsize);
1540     int xoffset = g->anim_start_frame % xsize;
1541     int yoffset = g->anim_start_frame % ysize;
1542     // may be needed if screen field is significantly larger than playfield
1543     int x = (lx + xoffset + SCR_FIELDX * xsize) % xsize;
1544     int y = (ly + yoffset + SCR_FIELDY * ysize) % ysize;
1545     int sync_frame = y * xsize + x;
1546
1547     return sync_frame % g->anim_frames;
1548   }
1549   else if (graphic_info[graphic].anim_mode & ANIM_RANDOM_STATIC)
1550   {
1551     struct GraphicInfo *g = &graphic_info[graphic];
1552     // may be needed if screen field is significantly larger than playfield
1553     int x = (lx + SCR_FIELDX * lev_fieldx) % lev_fieldx;
1554     int y = (ly + SCR_FIELDY * lev_fieldy) % lev_fieldy;
1555     int sync_frame = GfxRandomStatic[x][y];
1556
1557     return sync_frame % g->anim_frames;
1558   }
1559   else
1560   {
1561     int sync_frame = (IN_LEV_FIELD(lx, ly) ? GfxFrame[lx][ly] : -1);
1562
1563     return getGraphicAnimationFrame(graphic, sync_frame);
1564   }
1565 }
1566
1567 void getGraphicSourceBitmap(int graphic, int tilesize, Bitmap **bitmap)
1568 {
1569   struct GraphicInfo *g = &graphic_info[graphic];
1570   int tilesize_capped = MIN(MAX(1, tilesize), TILESIZE);
1571
1572   if (tilesize == gfx.standard_tile_size)
1573     *bitmap = g->bitmaps[IMG_BITMAP_STANDARD];
1574   else if (tilesize == game.tile_size)
1575     *bitmap = g->bitmaps[IMG_BITMAP_PTR_GAME];
1576   else
1577     *bitmap = g->bitmaps[IMG_BITMAP_1x1 - log_2(tilesize_capped)];
1578 }
1579
1580 void getGraphicSourceXY(int graphic, int frame, int *x, int *y,
1581                         boolean get_backside)
1582 {
1583   struct GraphicInfo *g = &graphic_info[graphic];
1584   int src_x = g->src_x + (get_backside ? g->offset2_x : 0);
1585   int src_y = g->src_y + (get_backside ? g->offset2_y : 0);
1586
1587   if (g->offset_y == 0)         // frames are ordered horizontally
1588   {
1589     int max_width = g->anim_frames_per_line * g->width;
1590     int pos = (src_y / g->height) * max_width + src_x + frame * g->offset_x;
1591
1592     *x = pos % max_width;
1593     *y = src_y % g->height + pos / max_width * g->height;
1594   }
1595   else if (g->offset_x == 0)    // frames are ordered vertically
1596   {
1597     int max_height = g->anim_frames_per_line * g->height;
1598     int pos = (src_x / g->width) * max_height + src_y + frame * g->offset_y;
1599
1600     *x = src_x % g->width + pos / max_height * g->width;
1601     *y = pos % max_height;
1602   }
1603   else                          // frames are ordered diagonally
1604   {
1605     *x = src_x + frame * g->offset_x;
1606     *y = src_y + frame * g->offset_y;
1607   }
1608 }
1609
1610 void getSizedGraphicSourceExt(int graphic, int frame, int tilesize,
1611                               Bitmap **bitmap, int *x, int *y,
1612                               boolean get_backside)
1613 {
1614   struct GraphicInfo *g = &graphic_info[graphic];
1615
1616   // if no graphics defined at all, use fallback graphics
1617   if (g->bitmaps == NULL)
1618     *g = graphic_info[IMG_CHAR_EXCLAM];
1619
1620   // if no in-game graphics defined, always use standard graphic size
1621   if (g->bitmaps[IMG_BITMAP_PTR_GAME] == NULL)
1622     tilesize = TILESIZE;
1623
1624   getGraphicSourceBitmap(graphic, tilesize, bitmap);
1625   getGraphicSourceXY(graphic, frame, x, y, get_backside);
1626
1627   *x = *x * tilesize / g->tile_size;
1628   *y = *y * tilesize / g->tile_size;
1629 }
1630
1631 void getSizedGraphicSource(int graphic, int frame, int tilesize,
1632                            Bitmap **bitmap, int *x, int *y)
1633 {
1634   getSizedGraphicSourceExt(graphic, frame, tilesize, bitmap, x, y, FALSE);
1635 }
1636
1637 void getFixedGraphicSource(int graphic, int frame,
1638                            Bitmap **bitmap, int *x, int *y)
1639 {
1640   getSizedGraphicSourceExt(graphic, frame, TILESIZE, bitmap, x, y, FALSE);
1641 }
1642
1643 void getMiniGraphicSource(int graphic, Bitmap **bitmap, int *x, int *y)
1644 {
1645   getSizedGraphicSource(graphic, 0, MINI_TILESIZE, bitmap, x, y);
1646 }
1647
1648 void getGlobalAnimGraphicSource(int graphic, int frame,
1649                                 Bitmap **bitmap, int *x, int *y)
1650 {
1651   struct GraphicInfo *g = &graphic_info[graphic];
1652
1653   // if no graphics defined at all, use fallback graphics
1654   if (g->bitmaps == NULL)
1655     *g = graphic_info[IMG_CHAR_EXCLAM];
1656
1657   // use original size graphics, if existing, else use standard size graphics
1658   if (g->bitmaps[IMG_BITMAP_PTR_ORIGINAL])
1659     *bitmap = g->bitmaps[IMG_BITMAP_PTR_ORIGINAL];
1660   else
1661     *bitmap = g->bitmaps[IMG_BITMAP_STANDARD];
1662
1663   getGraphicSourceXY(graphic, frame, x, y, FALSE);
1664 }
1665
1666 static void getGraphicSourceExt(int graphic, int frame, Bitmap **bitmap,
1667                                 int *x, int *y, boolean get_backside)
1668 {
1669   getSizedGraphicSourceExt(graphic, frame, TILESIZE_VAR, bitmap, x, y,
1670                            get_backside);
1671 }
1672
1673 void getGraphicSource(int graphic, int frame, Bitmap **bitmap, int *x, int *y)
1674 {
1675   getGraphicSourceExt(graphic, frame, bitmap, x, y, FALSE);
1676 }
1677
1678 void DrawGraphic(int x, int y, int graphic, int frame)
1679 {
1680 #if DEBUG
1681   if (!IN_SCR_FIELD(x, y))
1682   {
1683     Debug("draw:DrawGraphic", "x = %d, y = %d, graphic = %d", x, y, graphic);
1684     Debug("draw:DrawGraphic", "This should never happen!");
1685
1686     return;
1687   }
1688 #endif
1689
1690   DrawGraphicExt(drawto_field, FX + x * TILEX_VAR, FY + y * TILEY_VAR, graphic,
1691                  frame);
1692
1693   MarkTileDirty(x, y);
1694 }
1695
1696 void DrawFixedGraphic(int x, int y, int graphic, int frame)
1697 {
1698 #if DEBUG
1699   if (!IN_SCR_FIELD(x, y))
1700   {
1701     Debug("draw:DrawFixedGraphic", "x = %d, y = %d, graphic = %d",
1702           x, y, graphic);
1703     Debug("draw:DrawFixedGraphic", "This should never happen!");
1704
1705     return;
1706   }
1707 #endif
1708
1709   DrawFixedGraphicExt(drawto_field, FX + x * TILEX, FY + y * TILEY, graphic,
1710                       frame);
1711   MarkTileDirty(x, y);
1712 }
1713
1714 void DrawGraphicExt(DrawBuffer *dst_bitmap, int x, int y, int graphic,
1715                     int frame)
1716 {
1717   Bitmap *src_bitmap;
1718   int src_x, src_y;
1719
1720   getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1721
1722   BlitBitmap(src_bitmap, dst_bitmap, src_x, src_y, TILEX_VAR, TILEY_VAR, x, y);
1723 }
1724
1725 void DrawFixedGraphicExt(DrawBuffer *dst_bitmap, int x, int y, int graphic,
1726                          int frame)
1727 {
1728   Bitmap *src_bitmap;
1729   int src_x, src_y;
1730
1731   getFixedGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1732   BlitBitmap(src_bitmap, dst_bitmap, src_x, src_y, TILEX, TILEY, x, y);
1733 }
1734
1735 void DrawGraphicThruMask(int x, int y, int graphic, int frame)
1736 {
1737 #if DEBUG
1738   if (!IN_SCR_FIELD(x, y))
1739   {
1740     Debug("draw:DrawGraphicThruMask", "x = %d, y = %d, graphic = %d",
1741           x, y, graphic);
1742     Debug("draw:DrawGraphicThruMask", "This should never happen!");
1743
1744     return;
1745   }
1746 #endif
1747
1748   DrawGraphicThruMaskExt(drawto_field, FX + x * TILEX_VAR, FY + y * TILEY_VAR,
1749                          graphic, frame);
1750
1751   MarkTileDirty(x, y);
1752 }
1753
1754 void DrawFixedGraphicThruMask(int x, int y, int graphic, int frame)
1755 {
1756 #if DEBUG
1757   if (!IN_SCR_FIELD(x, y))
1758   {
1759     Debug("draw:DrawFixedGraphicThruMask", "x = %d, y = %d, graphic = %d",
1760           x, y, graphic);
1761     Debug("draw:DrawFixedGraphicThruMask", "This should never happen!");
1762
1763     return;
1764   }
1765 #endif
1766
1767   DrawFixedGraphicThruMaskExt(drawto_field, FX + x * TILEX, FY + y * TILEY,
1768                               graphic, frame);
1769   MarkTileDirty(x, y);
1770 }
1771
1772 void DrawGraphicThruMaskExt(DrawBuffer *d, int dst_x, int dst_y, int graphic,
1773                             int frame)
1774 {
1775   Bitmap *src_bitmap;
1776   int src_x, src_y;
1777
1778   getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1779
1780   BlitBitmapMasked(src_bitmap, d, src_x, src_y, TILEX_VAR, TILEY_VAR,
1781                    dst_x, dst_y);
1782 }
1783
1784 void DrawFixedGraphicThruMaskExt(DrawBuffer *d, int dst_x, int dst_y,
1785                                  int graphic, int frame)
1786 {
1787   Bitmap *src_bitmap;
1788   int src_x, src_y;
1789
1790   getFixedGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1791
1792   BlitBitmapMasked(src_bitmap, d, src_x, src_y, TILEX, TILEY,
1793                    dst_x, dst_y);
1794 }
1795
1796 void DrawSizedGraphic(int x, int y, int graphic, int frame, int tilesize)
1797 {
1798   DrawSizedGraphicExt(drawto, SX + x * tilesize, SY + y * tilesize, graphic,
1799                       frame, tilesize);
1800   MarkTileDirty(x / tilesize, y / tilesize);
1801 }
1802
1803 void DrawSizedGraphicThruMask(int x, int y, int graphic, int frame,
1804                               int tilesize)
1805 {
1806   DrawSizedGraphicThruMaskExt(drawto, SX + x * tilesize, SY + y * tilesize,
1807                               graphic, frame, tilesize);
1808   MarkTileDirty(x / tilesize, y / tilesize);
1809 }
1810
1811 void DrawSizedGraphicExt(DrawBuffer *d, int x, int y, int graphic, int frame,
1812                          int tilesize)
1813 {
1814   Bitmap *src_bitmap;
1815   int src_x, src_y;
1816
1817   getSizedGraphicSource(graphic, frame, tilesize, &src_bitmap, &src_x, &src_y);
1818   BlitBitmap(src_bitmap, d, src_x, src_y, tilesize, tilesize, x, y);
1819 }
1820
1821 void DrawSizedGraphicThruMaskExt(DrawBuffer *d, int x, int y, int graphic,
1822                                  int frame, int tilesize)
1823 {
1824   Bitmap *src_bitmap;
1825   int src_x, src_y;
1826
1827   getSizedGraphicSource(graphic, frame, tilesize, &src_bitmap, &src_x, &src_y);
1828   BlitBitmapMasked(src_bitmap, d, src_x, src_y, tilesize, tilesize, x, y);
1829 }
1830
1831 void DrawMiniGraphic(int x, int y, int graphic)
1832 {
1833   DrawMiniGraphicExt(drawto, SX + x * MINI_TILEX, SY + y * MINI_TILEY, graphic);
1834   MarkTileDirty(x / 2, y / 2);
1835 }
1836
1837 void DrawMiniGraphicExt(DrawBuffer *d, int x, int y, int graphic)
1838 {
1839   Bitmap *src_bitmap;
1840   int src_x, src_y;
1841
1842   getMiniGraphicSource(graphic, &src_bitmap, &src_x, &src_y);
1843   BlitBitmap(src_bitmap, d, src_x, src_y, MINI_TILEX, MINI_TILEY, x, y);
1844 }
1845
1846 static void DrawGraphicShiftedNormal(int x, int y, int dx, int dy,
1847                                      int graphic, int frame,
1848                                      int cut_mode, int mask_mode)
1849 {
1850   Bitmap *src_bitmap;
1851   int src_x, src_y;
1852   int dst_x, dst_y;
1853   int width = TILEX, height = TILEY;
1854   int cx = 0, cy = 0;
1855
1856   if (dx || dy)                 // shifted graphic
1857   {
1858     if (x < BX1)                // object enters playfield from the left
1859     {
1860       x = BX1;
1861       width = dx;
1862       cx = TILEX - dx;
1863       dx = 0;
1864     }
1865     else if (x > BX2)           // object enters playfield from the right
1866     {
1867       x = BX2;
1868       width = -dx;
1869       dx = TILEX + dx;
1870     }
1871     else if (x == BX1 && dx < 0) // object leaves playfield to the left
1872     {
1873       width += dx;
1874       cx = -dx;
1875       dx = 0;
1876     }
1877     else if (x == BX2 && dx > 0) // object leaves playfield to the right
1878       width -= dx;
1879     else if (dx)                // general horizontal movement
1880       MarkTileDirty(x + SIGN(dx), y);
1881
1882     if (y < BY1)                // object enters playfield from the top
1883     {
1884       if (cut_mode == CUT_BELOW) // object completely above top border
1885         return;
1886
1887       y = BY1;
1888       height = dy;
1889       cy = TILEY - dy;
1890       dy = 0;
1891     }
1892     else if (y > BY2)           // object enters playfield from the bottom
1893     {
1894       y = BY2;
1895       height = -dy;
1896       dy = TILEY + dy;
1897     }
1898     else if (y == BY1 && dy < 0) // object leaves playfield to the top
1899     {
1900       height += dy;
1901       cy = -dy;
1902       dy = 0;
1903     }
1904     else if (dy > 0 && cut_mode == CUT_ABOVE)
1905     {
1906       if (y == BY2)             // object completely above bottom border
1907         return;
1908
1909       height = dy;
1910       cy = TILEY - dy;
1911       dy = TILEY;
1912       MarkTileDirty(x, y + 1);
1913     }                           // object leaves playfield to the bottom
1914     else if (dy > 0 && (y == BY2 || cut_mode == CUT_BELOW))
1915       height -= dy;
1916     else if (dy)                // general vertical movement
1917       MarkTileDirty(x, y + SIGN(dy));
1918   }
1919
1920 #if DEBUG
1921   if (!IN_SCR_FIELD(x, y))
1922   {
1923     Debug("draw:DrawGraphicShiftedNormal", "x = %d, y = %d, graphic = %d",
1924           x, y, graphic);
1925     Debug("draw:DrawGraphicShiftedNormal", "This should never happen!");
1926
1927     return;
1928   }
1929 #endif
1930
1931   width = width * TILESIZE_VAR / TILESIZE;
1932   height = height * TILESIZE_VAR / TILESIZE;
1933   cx = cx * TILESIZE_VAR / TILESIZE;
1934   cy = cy * TILESIZE_VAR / TILESIZE;
1935   dx = dx * TILESIZE_VAR / TILESIZE;
1936   dy = dy * TILESIZE_VAR / TILESIZE;
1937
1938   if (width > 0 && height > 0)
1939   {
1940     getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
1941
1942     src_x += cx;
1943     src_y += cy;
1944
1945     dst_x = FX + x * TILEX_VAR + dx;
1946     dst_y = FY + y * TILEY_VAR + dy;
1947
1948     if (mask_mode == USE_MASKING)
1949       BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
1950                        dst_x, dst_y);
1951     else
1952       BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
1953                  dst_x, dst_y);
1954
1955     MarkTileDirty(x, y);
1956   }
1957 }
1958
1959 static void DrawGraphicShiftedDouble(int x, int y, int dx, int dy,
1960                                      int graphic, int frame,
1961                                      int cut_mode, int mask_mode)
1962 {
1963   Bitmap *src_bitmap;
1964   int src_x, src_y;
1965   int dst_x, dst_y;
1966   int width = TILEX_VAR, height = TILEY_VAR;
1967   int x1 = x;
1968   int y1 = y;
1969   int x2 = x + SIGN(dx);
1970   int y2 = y + SIGN(dy);
1971
1972   // movement with two-tile animations must be sync'ed with movement position,
1973   // not with current GfxFrame (which can be higher when using slow movement)
1974   int anim_pos = (dx ? ABS(dx) : ABS(dy));
1975   int anim_frames = graphic_info[graphic].anim_frames;
1976
1977   // (we also need anim_delay here for movement animations with less frames)
1978   int anim_delay = graphic_info[graphic].anim_delay;
1979   int sync_frame = anim_pos * anim_frames * anim_delay / TILESIZE;
1980
1981   boolean draw_start_tile = (cut_mode != CUT_ABOVE);    // only for falling!
1982   boolean draw_end_tile   = (cut_mode != CUT_BELOW);    // only for falling!
1983
1984   // re-calculate animation frame for two-tile movement animation
1985   frame = getGraphicAnimationFrame(graphic, sync_frame);
1986
1987   // check if movement start graphic inside screen area and should be drawn
1988   if (draw_start_tile && IN_SCR_FIELD(x1, y1))
1989   {
1990     getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y, TRUE);
1991
1992     dst_x = FX + x1 * TILEX_VAR;
1993     dst_y = FY + y1 * TILEY_VAR;
1994
1995     if (mask_mode == USE_MASKING)
1996       BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
1997                        dst_x, dst_y);
1998     else
1999       BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
2000                  dst_x, dst_y);
2001
2002     MarkTileDirty(x1, y1);
2003   }
2004
2005   // check if movement end graphic inside screen area and should be drawn
2006   if (draw_end_tile && IN_SCR_FIELD(x2, y2))
2007   {
2008     getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y, FALSE);
2009
2010     dst_x = FX + x2 * TILEX_VAR;
2011     dst_y = FY + y2 * TILEY_VAR;
2012
2013     if (mask_mode == USE_MASKING)
2014       BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
2015                        dst_x, dst_y);
2016     else
2017       BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
2018                  dst_x, dst_y);
2019
2020     MarkTileDirty(x2, y2);
2021   }
2022 }
2023
2024 static void DrawGraphicShifted(int x, int y, int dx, int dy,
2025                                int graphic, int frame,
2026                                int cut_mode, int mask_mode)
2027 {
2028   if (graphic < 0)
2029   {
2030     DrawGraphic(x, y, graphic, frame);
2031
2032     return;
2033   }
2034
2035   if (graphic_info[graphic].double_movement)    // EM style movement images
2036     DrawGraphicShiftedDouble(x, y, dx, dy, graphic, frame, cut_mode, mask_mode);
2037   else
2038     DrawGraphicShiftedNormal(x, y, dx, dy, graphic, frame, cut_mode, mask_mode);
2039 }
2040
2041 static void DrawGraphicShiftedThruMask(int x, int y, int dx, int dy,
2042                                        int graphic, int frame, int cut_mode)
2043 {
2044   DrawGraphicShifted(x, y, dx, dy, graphic, frame, cut_mode, USE_MASKING);
2045 }
2046
2047 void DrawScreenElementExt(int x, int y, int dx, int dy, int element,
2048                           int cut_mode, int mask_mode)
2049 {
2050   int lx = LEVELX(x), ly = LEVELY(y);
2051   int graphic;
2052   int frame;
2053
2054   if (IN_LEV_FIELD(lx, ly))
2055   {
2056     if (element == EL_EMPTY)
2057       element = GfxElementEmpty[lx][ly];
2058
2059     SetRandomAnimationValue(lx, ly);
2060
2061     graphic = el_act_dir2img(element, GfxAction[lx][ly], GfxDir[lx][ly]);
2062     frame = getGraphicAnimationFrameXY(graphic, lx, ly);
2063
2064     // do not use double (EM style) movement graphic when not moving
2065     if (graphic_info[graphic].double_movement && !dx && !dy)
2066     {
2067       graphic = el_act_dir2img(element, ACTION_DEFAULT, GfxDir[lx][ly]);
2068       frame = getGraphicAnimationFrameXY(graphic, lx, ly);
2069     }
2070
2071     if (game.use_masked_elements && (dx || dy))
2072       mask_mode = USE_MASKING;
2073   }
2074   else  // border element
2075   {
2076     graphic = el2img(element);
2077     frame = getGraphicAnimationFrameXY(graphic, lx, ly);
2078   }
2079
2080   if (element == EL_EXPANDABLE_WALL)
2081   {
2082     boolean left_stopped = FALSE, right_stopped = FALSE;
2083
2084     if (!IN_LEV_FIELD(lx - 1, ly) || IS_WALL(Tile[lx - 1][ly]))
2085       left_stopped = TRUE;
2086     if (!IN_LEV_FIELD(lx + 1, ly) || IS_WALL(Tile[lx + 1][ly]))
2087       right_stopped = TRUE;
2088
2089     if (left_stopped && right_stopped)
2090       graphic = IMG_WALL;
2091     else if (left_stopped)
2092     {
2093       graphic = IMG_EXPANDABLE_WALL_GROWING_RIGHT;
2094       frame = graphic_info[graphic].anim_frames - 1;
2095     }
2096     else if (right_stopped)
2097     {
2098       graphic = IMG_EXPANDABLE_WALL_GROWING_LEFT;
2099       frame = graphic_info[graphic].anim_frames - 1;
2100     }
2101   }
2102
2103   if (dx || dy)
2104     DrawGraphicShifted(x, y, dx, dy, graphic, frame, cut_mode, mask_mode);
2105   else if (mask_mode == USE_MASKING)
2106     DrawGraphicThruMask(x, y, graphic, frame);
2107   else
2108     DrawGraphic(x, y, graphic, frame);
2109 }
2110
2111 void DrawLevelElementExt(int x, int y, int dx, int dy, int element,
2112                          int cut_mode, int mask_mode)
2113 {
2114   if (IN_LEV_FIELD(x, y) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
2115     DrawScreenElementExt(SCREENX(x), SCREENY(y), dx, dy, element,
2116                          cut_mode, mask_mode);
2117 }
2118
2119 void DrawScreenElementShifted(int x, int y, int dx, int dy, int element,
2120                               int cut_mode)
2121 {
2122   DrawScreenElementExt(x, y, dx, dy, element, cut_mode, NO_MASKING);
2123 }
2124
2125 void DrawLevelElementShifted(int x, int y, int dx, int dy, int element,
2126                              int cut_mode)
2127 {
2128   DrawLevelElementExt(x, y, dx, dy, element, cut_mode, NO_MASKING);
2129 }
2130
2131 void DrawLevelElementThruMask(int x, int y, int element)
2132 {
2133   DrawLevelElementExt(x, y, 0, 0, element, NO_CUTTING, USE_MASKING);
2134 }
2135
2136 void DrawLevelFieldThruMask(int x, int y)
2137 {
2138   DrawLevelElementExt(x, y, 0, 0, Tile[x][y], NO_CUTTING, USE_MASKING);
2139 }
2140
2141 // !!! implementation of quicksand is totally broken !!!
2142 #define IS_CRUMBLED_TILE(x, y, e)                                       \
2143         (GFX_CRUMBLED(e) && (!IN_LEV_FIELD(x, y) ||                     \
2144                              !IS_MOVING(x, y) ||                        \
2145                              (e) == EL_QUICKSAND_EMPTYING ||            \
2146                              (e) == EL_QUICKSAND_FAST_EMPTYING))
2147
2148 static void DrawLevelFieldCrumbledInnerCorners(int x, int y, int dx, int dy,
2149                                                int graphic)
2150 {
2151   Bitmap *src_bitmap;
2152   int src_x, src_y;
2153   int width, height, cx, cy;
2154   int sx = SCREENX(x), sy = SCREENY(y);
2155   int crumbled_border_size = graphic_info[graphic].border_size;
2156   int crumbled_tile_size = graphic_info[graphic].tile_size;
2157   int crumbled_border_size_var =
2158     crumbled_border_size * TILESIZE_VAR / crumbled_tile_size;
2159   int i;
2160
2161   getGraphicSource(graphic, 0, &src_bitmap, &src_x, &src_y);
2162
2163   for (i = 1; i < 4; i++)
2164   {
2165     int dxx = (i & 1 ? dx : 0);
2166     int dyy = (i & 2 ? dy : 0);
2167     int xx = x + dxx;
2168     int yy = y + dyy;
2169     int element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
2170                    BorderElement);
2171
2172     // check if neighbour field is of same crumble type
2173     boolean same = (IS_CRUMBLED_TILE(xx, yy, element) &&
2174                     graphic_info[graphic].class ==
2175                     graphic_info[el_act2crm(element, ACTION_DEFAULT)].class);
2176
2177     // return if check prevents inner corner
2178     if (same == (dxx == dx && dyy == dy))
2179       return;
2180   }
2181
2182   // if we reach this point, we have an inner corner
2183
2184   getGraphicSource(graphic, 1, &src_bitmap, &src_x, &src_y);
2185
2186   width  = crumbled_border_size_var;
2187   height = crumbled_border_size_var;
2188   cx = (dx > 0 ? TILESIZE_VAR - width  : 0);
2189   cy = (dy > 0 ? TILESIZE_VAR - height : 0);
2190
2191   if (game.use_masked_elements)
2192   {
2193     int graphic0 = el2img(EL_EMPTY);
2194     int frame0 = getGraphicAnimationFrameXY(graphic0, x, y);
2195     Bitmap *src_bitmap0;
2196     int src_x0, src_y0;
2197
2198     getGraphicSource(graphic0, frame0, &src_bitmap0, &src_x0, &src_y0);
2199
2200     BlitBitmap(src_bitmap0, drawto_field, src_x0 + cx, src_y0 + cy,
2201                width, height,
2202                FX + sx * TILEX_VAR + cx, FY + sy * TILEY_VAR + cy);
2203
2204     BlitBitmapMasked(src_bitmap, drawto_field, src_x + cx, src_y + cy,
2205                      width, height,
2206                      FX + sx * TILEX_VAR + cx, FY + sy * TILEY_VAR + cy);
2207   }
2208   else
2209     BlitBitmap(src_bitmap, drawto_field, src_x + cx, src_y + cy,
2210                width, height,
2211                FX + sx * TILEX_VAR + cx, FY + sy * TILEY_VAR + cy);
2212 }
2213
2214 static void DrawLevelFieldCrumbledBorders(int x, int y, int graphic, int frame,
2215                                           int dir)
2216 {
2217   Bitmap *src_bitmap;
2218   int src_x, src_y;
2219   int width, height, bx, by, cx, cy;
2220   int sx = SCREENX(x), sy = SCREENY(y);
2221   int crumbled_border_size = graphic_info[graphic].border_size;
2222   int crumbled_tile_size = graphic_info[graphic].tile_size;
2223   int crumbled_border_size_var =
2224     crumbled_border_size * TILESIZE_VAR / crumbled_tile_size;
2225   int crumbled_border_pos_var = TILESIZE_VAR - crumbled_border_size_var;
2226   int i;
2227
2228   getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
2229
2230   // only needed when using masked elements
2231   int graphic0 = el2img(EL_EMPTY);
2232   int frame0 = getGraphicAnimationFrameXY(graphic0, x, y);
2233   Bitmap *src_bitmap0;
2234   int src_x0, src_y0;
2235
2236   if (game.use_masked_elements)
2237     getGraphicSource(graphic0, frame0, &src_bitmap0, &src_x0, &src_y0);
2238
2239   // draw simple, sloppy, non-corner-accurate crumbled border
2240
2241   width  = (dir == 1 || dir == 2 ? crumbled_border_size_var : TILESIZE_VAR);
2242   height = (dir == 0 || dir == 3 ? crumbled_border_size_var : TILESIZE_VAR);
2243   cx = (dir == 2 ? crumbled_border_pos_var : 0);
2244   cy = (dir == 3 ? crumbled_border_pos_var : 0);
2245
2246   if (game.use_masked_elements)
2247   {
2248     BlitBitmap(src_bitmap0, drawto_field, src_x0 + cx, src_y0 + cy,
2249                width, height,
2250                FX + sx * TILEX_VAR + cx,
2251                FY + sy * TILEY_VAR + cy);
2252
2253     BlitBitmapMasked(src_bitmap, drawto_field, src_x + cx, src_y + cy,
2254                      width, height,
2255                      FX + sx * TILEX_VAR + cx,
2256                      FY + sy * TILEY_VAR + cy);
2257   }
2258   else
2259     BlitBitmap(src_bitmap, drawto_field, src_x + cx, src_y + cy,
2260                width, height,
2261                FX + sx * TILEX_VAR + cx,
2262                FY + sy * TILEY_VAR + cy);
2263
2264   // (remaining middle border part must be at least as big as corner part)
2265   if (!(graphic_info[graphic].style & STYLE_ACCURATE_BORDERS) ||
2266       crumbled_border_size_var >= TILESIZE_VAR / 3)
2267     return;
2268
2269   // correct corners of crumbled border, if needed
2270
2271   for (i = -1; i <= 1; i += 2)
2272   {
2273     int xx = x + (dir == 0 || dir == 3 ? i : 0);
2274     int yy = y + (dir == 1 || dir == 2 ? i : 0);
2275     int element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
2276                    BorderElement);
2277
2278     // check if neighbour field is of same crumble type
2279     if (IS_CRUMBLED_TILE(xx, yy, element) &&
2280         graphic_info[graphic].class ==
2281         graphic_info[el_act2crm(element, ACTION_DEFAULT)].class)
2282     {
2283       // no crumbled corner, but continued crumbled border
2284
2285       int c1 = (dir == 2 || dir == 3 ? crumbled_border_pos_var : 0);
2286       int c2 = (i == 1 ? crumbled_border_pos_var : 0);
2287       int b1 = (i == 1 ? crumbled_border_size_var :
2288                 TILESIZE_VAR - 2 * crumbled_border_size_var);
2289
2290       width  = crumbled_border_size_var;
2291       height = crumbled_border_size_var;
2292
2293       if (dir == 1 || dir == 2)
2294       {
2295         cx = c1;
2296         cy = c2;
2297         bx = cx;
2298         by = b1;
2299       }
2300       else
2301       {
2302         cx = c2;
2303         cy = c1;
2304         bx = b1;
2305         by = cy;
2306       }
2307
2308       if (game.use_masked_elements)
2309       {
2310         BlitBitmap(src_bitmap0, drawto_field, src_x0 + bx, src_y0 + by,
2311                    width, height,
2312                    FX + sx * TILEX_VAR + cx,
2313                    FY + sy * TILEY_VAR + cy);
2314
2315         BlitBitmapMasked(src_bitmap, drawto_field, src_x + bx, src_y + by,
2316                          width, height,
2317                          FX + sx * TILEX_VAR + cx,
2318                          FY + sy * TILEY_VAR + cy);
2319       }
2320       else
2321         BlitBitmap(src_bitmap, drawto_field, src_x + bx, src_y + by,
2322                    width, height,
2323                    FX + sx * TILEX_VAR + cx,
2324                    FY + sy * TILEY_VAR + cy);
2325     }
2326   }
2327 }
2328
2329 static void DrawLevelFieldCrumbledExt(int x, int y, int graphic, int frame)
2330 {
2331   int sx = SCREENX(x), sy = SCREENY(y);
2332   int element;
2333   int i;
2334   struct XY *xy = xy_topdown;
2335
2336   if (!IN_LEV_FIELD(x, y))
2337     return;
2338
2339   element = TILE_GFX_ELEMENT(x, y);
2340
2341   if (IS_CRUMBLED_TILE(x, y, element))          // crumble field itself
2342   {
2343     if (!IN_SCR_FIELD(sx, sy))
2344       return;
2345
2346     // crumble field borders towards direct neighbour fields
2347     for (i = 0; i < 4; i++)
2348     {
2349       int xx = x + xy[i].x;
2350       int yy = y + xy[i].y;
2351
2352       element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
2353                  BorderElement);
2354
2355       // check if neighbour field is of same crumble type
2356       if (IS_CRUMBLED_TILE(xx, yy, element) &&
2357           graphic_info[graphic].class ==
2358           graphic_info[el_act2crm(element, ACTION_DEFAULT)].class)
2359         continue;
2360
2361       DrawLevelFieldCrumbledBorders(x, y, graphic, frame, i);
2362     }
2363
2364     // crumble inner field corners towards corner neighbour fields
2365     if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
2366         graphic_info[graphic].anim_frames == 2)
2367     {
2368       for (i = 0; i < 4; i++)
2369       {
2370         int dx = (i & 1 ? +1 : -1);
2371         int dy = (i & 2 ? +1 : -1);
2372
2373         DrawLevelFieldCrumbledInnerCorners(x, y, dx, dy, graphic);
2374       }
2375     }
2376
2377     MarkTileDirty(sx, sy);
2378   }
2379   else          // center field is not crumbled -- crumble neighbour fields
2380   {
2381     // crumble field borders of direct neighbour fields
2382     for (i = 0; i < 4; i++)
2383     {
2384       int xx = x + xy[i].x;
2385       int yy = y + xy[i].y;
2386       int sxx = sx + xy[i].x;
2387       int syy = sy + xy[i].y;
2388
2389       if (!IN_LEV_FIELD(xx, yy) ||
2390           !IN_SCR_FIELD(sxx, syy))
2391         continue;
2392
2393       // do not crumble fields that are being digged or snapped
2394       if (Tile[xx][yy] == EL_EMPTY ||
2395           Tile[xx][yy] == EL_ELEMENT_SNAPPING)
2396         continue;
2397
2398       element = TILE_GFX_ELEMENT(xx, yy);
2399
2400       if (!IS_CRUMBLED_TILE(xx, yy, element))
2401         continue;
2402
2403       graphic = el_act2crm(element, ACTION_DEFAULT);
2404
2405       DrawLevelFieldCrumbledBorders(xx, yy, graphic, 0, 3 - i);
2406
2407       MarkTileDirty(sxx, syy);
2408     }
2409
2410     // crumble inner field corners of corner neighbour fields
2411     for (i = 0; i < 4; i++)
2412     {
2413       int dx = (i & 1 ? +1 : -1);
2414       int dy = (i & 2 ? +1 : -1);
2415       int xx = x + dx;
2416       int yy = y + dy;
2417       int sxx = sx + dx;
2418       int syy = sy + dy;
2419
2420       if (!IN_LEV_FIELD(xx, yy) ||
2421           !IN_SCR_FIELD(sxx, syy))
2422         continue;
2423
2424       if (Tile[xx][yy] == EL_ELEMENT_SNAPPING)
2425         continue;
2426
2427       element = TILE_GFX_ELEMENT(xx, yy);
2428
2429       if (!IS_CRUMBLED_TILE(xx, yy, element))
2430         continue;
2431
2432       graphic = el_act2crm(element, ACTION_DEFAULT);
2433
2434       if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
2435           graphic_info[graphic].anim_frames == 2)
2436         DrawLevelFieldCrumbledInnerCorners(xx, yy, -dx, -dy, graphic);
2437
2438       MarkTileDirty(sxx, syy);
2439     }
2440   }
2441 }
2442
2443 void DrawLevelFieldCrumbled(int x, int y)
2444 {
2445   int graphic;
2446
2447   if (!IN_LEV_FIELD(x, y))
2448     return;
2449
2450   if (Tile[x][y] == EL_ELEMENT_SNAPPING &&
2451       GfxElement[x][y] != EL_UNDEFINED &&
2452       GFX_CRUMBLED(GfxElement[x][y]))
2453   {
2454     DrawLevelFieldCrumbledDigging(x, y, GfxDir[x][y], GfxFrame[x][y]);
2455
2456     return;
2457   }
2458
2459   graphic = el_act2crm(TILE_GFX_ELEMENT(x, y), ACTION_DEFAULT);
2460
2461   DrawLevelFieldCrumbledExt(x, y, graphic, 0);
2462 }
2463
2464 void DrawLevelFieldCrumbledDigging(int x, int y, int direction,
2465                                    int step_frame)
2466 {
2467   int graphic1 = el_act_dir2img(GfxElement[x][y], ACTION_DIGGING, direction);
2468   int graphic2 = el_act_dir2crm(GfxElement[x][y], ACTION_DIGGING, direction);
2469   int frame1 = getGraphicAnimationFrame(graphic1, step_frame);
2470   int frame2 = getGraphicAnimationFrame(graphic2, step_frame);
2471   int sx = SCREENX(x), sy = SCREENY(y);
2472
2473   DrawScreenGraphic(sx, sy, graphic1, frame1);
2474   DrawLevelFieldCrumbledExt(x, y, graphic2, frame2);
2475 }
2476
2477 void DrawLevelFieldCrumbledNeighbours(int x, int y)
2478 {
2479   int sx = SCREENX(x), sy = SCREENY(y);
2480   struct XY *xy = xy_topdown;
2481   int i;
2482
2483   // crumble direct neighbour fields (required for field borders)
2484   for (i = 0; i < 4; i++)
2485   {
2486     int xx = x + xy[i].x;
2487     int yy = y + xy[i].y;
2488     int sxx = sx + xy[i].x;
2489     int syy = sy + xy[i].y;
2490
2491     if (!IN_LEV_FIELD(xx, yy) ||
2492         !IN_SCR_FIELD(sxx, syy) ||
2493         !GFX_CRUMBLED(Tile[xx][yy]) ||
2494         IS_MOVING(xx, yy))
2495       continue;
2496
2497     DrawLevelField(xx, yy);
2498   }
2499
2500   // crumble corner neighbour fields (required for inner field corners)
2501   for (i = 0; i < 4; i++)
2502   {
2503     int dx = (i & 1 ? +1 : -1);
2504     int dy = (i & 2 ? +1 : -1);
2505     int xx = x + dx;
2506     int yy = y + dy;
2507     int sxx = sx + dx;
2508     int syy = sy + dy;
2509
2510     if (!IN_LEV_FIELD(xx, yy) ||
2511         !IN_SCR_FIELD(sxx, syy) ||
2512         !GFX_CRUMBLED(Tile[xx][yy]) ||
2513         IS_MOVING(xx, yy))
2514       continue;
2515
2516     int element = TILE_GFX_ELEMENT(xx, yy);
2517     int graphic = el_act2crm(element, ACTION_DEFAULT);
2518
2519     if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
2520         graphic_info[graphic].anim_frames == 2)
2521       DrawLevelField(xx, yy);
2522   }
2523 }
2524
2525 static int getBorderElement(int x, int y)
2526 {
2527   int border[7][2] =
2528   {
2529     { EL_STEELWALL_TOPLEFT,             EL_INVISIBLE_STEELWALL_TOPLEFT     },
2530     { EL_STEELWALL_TOPRIGHT,            EL_INVISIBLE_STEELWALL_TOPRIGHT    },
2531     { EL_STEELWALL_BOTTOMLEFT,          EL_INVISIBLE_STEELWALL_BOTTOMLEFT  },
2532     { EL_STEELWALL_BOTTOMRIGHT,         EL_INVISIBLE_STEELWALL_BOTTOMRIGHT },
2533     { EL_STEELWALL_VERTICAL,            EL_INVISIBLE_STEELWALL_VERTICAL    },
2534     { EL_STEELWALL_HORIZONTAL,          EL_INVISIBLE_STEELWALL_HORIZONTAL  },
2535     { EL_STEELWALL,                     EL_INVISIBLE_STEELWALL             }
2536   };
2537   int steel_type = (BorderElement == EL_STEELWALL ? 0 : 1);
2538   int steel_position = (x == -1         && y == -1              ? 0 :
2539                         x == lev_fieldx && y == -1              ? 1 :
2540                         x == -1         && y == lev_fieldy      ? 2 :
2541                         x == lev_fieldx && y == lev_fieldy      ? 3 :
2542                         x == -1         || x == lev_fieldx      ? 4 :
2543                         y == -1         || y == lev_fieldy      ? 5 : 6);
2544
2545   return border[steel_position][steel_type];
2546 }
2547
2548 void DrawScreenGraphic(int x, int y, int graphic, int frame)
2549 {
2550   if (game.use_masked_elements)
2551   {
2552     if (graphic != el2img(EL_EMPTY))
2553       DrawScreenElementExt(x, y, 0, 0, EL_EMPTY, NO_CUTTING, NO_MASKING);
2554
2555     DrawGraphicThruMask(x, y, graphic, frame);
2556   }
2557   else
2558   {
2559     DrawGraphic(x, y, graphic, frame);
2560   }
2561 }
2562
2563 void DrawLevelGraphic(int x, int y, int graphic, int frame)
2564 {
2565   DrawScreenGraphic(SCREENX(x), SCREENY(y), graphic, frame);
2566 }
2567
2568 void DrawScreenElement(int x, int y, int element)
2569 {
2570   int mask_mode = NO_MASKING;
2571
2572   if (game.use_masked_elements)
2573   {
2574     int lx = LEVELX(x), ly = LEVELY(y);
2575
2576     if (IN_LEV_FIELD(lx, ly) && element != EL_EMPTY)
2577     {
2578       DrawScreenElementExt(x, y, 0, 0, EL_EMPTY, NO_CUTTING, NO_MASKING);
2579
2580       mask_mode = USE_MASKING;
2581     }
2582   }
2583
2584   DrawScreenElementExt(x, y, 0, 0, element, NO_CUTTING, mask_mode);
2585   DrawLevelFieldCrumbled(LEVELX(x), LEVELY(y));
2586 }
2587
2588 void DrawLevelElement(int x, int y, int element)
2589 {
2590   if (IN_LEV_FIELD(x, y) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
2591     DrawScreenElement(SCREENX(x), SCREENY(y), element);
2592 }
2593
2594 void DrawScreenField(int x, int y)
2595 {
2596   int lx = LEVELX(x), ly = LEVELY(y);
2597   int element, content;
2598
2599   if (!IN_LEV_FIELD(lx, ly))
2600   {
2601     if (lx < -1 || lx > lev_fieldx || ly < -1 || ly > lev_fieldy)
2602       element = EL_EMPTY;
2603     else
2604       element = getBorderElement(lx, ly);
2605
2606     DrawScreenElement(x, y, element);
2607
2608     return;
2609   }
2610
2611   element = Tile[lx][ly];
2612   content = Store[lx][ly];
2613
2614   if (IS_MOVING(lx, ly))
2615   {
2616     int horiz_move = (MovDir[lx][ly] == MV_LEFT || MovDir[lx][ly] == MV_RIGHT);
2617     boolean cut_mode = NO_CUTTING;
2618
2619     if (element == EL_QUICKSAND_EMPTYING ||
2620         element == EL_QUICKSAND_FAST_EMPTYING ||
2621         element == EL_MAGIC_WALL_EMPTYING ||
2622         element == EL_BD_MAGIC_WALL_EMPTYING ||
2623         element == EL_DC_MAGIC_WALL_EMPTYING ||
2624         element == EL_AMOEBA_DROPPING)
2625       cut_mode = CUT_ABOVE;
2626     else if (element == EL_QUICKSAND_FILLING ||
2627              element == EL_QUICKSAND_FAST_FILLING ||
2628              element == EL_MAGIC_WALL_FILLING ||
2629              element == EL_BD_MAGIC_WALL_FILLING ||
2630              element == EL_DC_MAGIC_WALL_FILLING)
2631       cut_mode = CUT_BELOW;
2632
2633     if (cut_mode == CUT_ABOVE)
2634       DrawScreenElement(x, y, element);
2635     else
2636       DrawScreenElement(x, y, EL_EMPTY);
2637
2638     if (cut_mode != CUT_BELOW && game.use_masked_elements)
2639     {
2640       int dir = MovDir[lx][ly];
2641       int newx = x + (dir == MV_LEFT ? -1 : dir == MV_RIGHT ? +1 : 0);
2642       int newy = y + (dir == MV_UP   ? -1 : dir == MV_DOWN  ? +1 : 0);
2643
2644       if (IN_SCR_FIELD(newx, newy))
2645         DrawScreenElement(newx, newy, EL_EMPTY);
2646     }
2647
2648     if (horiz_move)
2649       DrawScreenElementShifted(x, y, MovPos[lx][ly], 0, element, NO_CUTTING);
2650     else if (cut_mode == NO_CUTTING)
2651       DrawScreenElementShifted(x, y, 0, MovPos[lx][ly], element, cut_mode);
2652     else
2653     {
2654       DrawScreenElementShifted(x, y, 0, MovPos[lx][ly], content, cut_mode);
2655
2656       if (cut_mode == CUT_BELOW &&
2657           IN_LEV_FIELD(lx, ly + 1) && IN_SCR_FIELD(x, y + 1))
2658         DrawLevelElement(lx, ly + 1, element);
2659     }
2660
2661     if (content == EL_ACID)
2662     {
2663       int dir = MovDir[lx][ly];
2664       int newlx = lx + (dir == MV_LEFT ? -1 : dir == MV_RIGHT ? +1 : 0);
2665       int newly = ly + (dir == MV_UP   ? -1 : dir == MV_DOWN  ? +1 : 0);
2666
2667       DrawLevelElementThruMask(newlx, newly, EL_ACID);
2668
2669       // prevent target field from being drawn again (but without masking)
2670       // (this would happen if target field is scanned after moving element)
2671       Stop[newlx][newly] = TRUE;
2672     }
2673   }
2674   else if (IS_BLOCKED(lx, ly))
2675   {
2676     int oldx, oldy;
2677     int sx, sy;
2678     int horiz_move;
2679     boolean cut_mode = NO_CUTTING;
2680     int element_old, content_old;
2681
2682     Blocked2Moving(lx, ly, &oldx, &oldy);
2683     sx = SCREENX(oldx);
2684     sy = SCREENY(oldy);
2685     horiz_move = (MovDir[oldx][oldy] == MV_LEFT ||
2686                   MovDir[oldx][oldy] == MV_RIGHT);
2687
2688     element_old = Tile[oldx][oldy];
2689     content_old = Store[oldx][oldy];
2690
2691     if (element_old == EL_QUICKSAND_EMPTYING ||
2692         element_old == EL_QUICKSAND_FAST_EMPTYING ||
2693         element_old == EL_MAGIC_WALL_EMPTYING ||
2694         element_old == EL_BD_MAGIC_WALL_EMPTYING ||
2695         element_old == EL_DC_MAGIC_WALL_EMPTYING ||
2696         element_old == EL_AMOEBA_DROPPING)
2697       cut_mode = CUT_ABOVE;
2698
2699     DrawScreenElement(x, y, EL_EMPTY);
2700
2701     if (horiz_move)
2702       DrawScreenElementShifted(sx, sy, MovPos[oldx][oldy], 0, element_old,
2703                                NO_CUTTING);
2704     else if (cut_mode == NO_CUTTING)
2705       DrawScreenElementShifted(sx, sy, 0, MovPos[oldx][oldy], element_old,
2706                                cut_mode);
2707     else
2708       DrawScreenElementShifted(sx, sy, 0, MovPos[oldx][oldy], content_old,
2709                                cut_mode);
2710   }
2711   else if (IS_DRAWABLE(element))
2712     DrawScreenElement(x, y, element);
2713   else
2714     DrawScreenElement(x, y, EL_EMPTY);
2715 }
2716
2717 void DrawLevelField(int x, int y)
2718 {
2719   if (IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
2720     DrawScreenField(SCREENX(x), SCREENY(y));
2721   else if (IS_MOVING(x, y))
2722   {
2723     int newx, newy;
2724
2725     Moving2Blocked(x, y, &newx, &newy);
2726     if (IN_SCR_FIELD(SCREENX(newx), SCREENY(newy)))
2727       DrawScreenField(SCREENX(newx), SCREENY(newy));
2728   }
2729   else if (IS_BLOCKED(x, y))
2730   {
2731     int oldx, oldy;
2732
2733     Blocked2Moving(x, y, &oldx, &oldy);
2734     if (IN_SCR_FIELD(SCREENX(oldx), SCREENY(oldy)))
2735       DrawScreenField(SCREENX(oldx), SCREENY(oldy));
2736   }
2737 }
2738
2739 static void DrawSizedWallExt_MM(int dst_x, int dst_y, int element, int tilesize,
2740                                 int (*el2img_function)(int), boolean masked,
2741                                 int element_bits_draw)
2742 {
2743   int element_base = map_mm_wall_element(element);
2744   int element_bits = (IS_DF_WALL(element) ?
2745                       element - EL_DF_WALL_START :
2746                       IS_MM_WALL(element) ?
2747                       element - EL_MM_WALL_START : EL_EMPTY) & 0x000f;
2748   int graphic = el2img_function(element_base);
2749   int tilesize_draw = tilesize / 2;
2750   Bitmap *src_bitmap;
2751   int src_x, src_y;
2752   int i;
2753
2754   getSizedGraphicSource(graphic, 0, tilesize_draw, &src_bitmap, &src_x, &src_y);
2755
2756   for (i = 0; i < 4; i++)
2757   {
2758     int dst_draw_x = dst_x + (i % 2) * tilesize_draw;
2759     int dst_draw_y = dst_y + (i / 2) * tilesize_draw;
2760
2761     if (!(element_bits_draw & (1 << i)))
2762       continue;
2763
2764     if (element_bits & (1 << i))
2765     {
2766       if (masked)
2767         BlitBitmapMasked(src_bitmap, drawto, src_x, src_y,
2768                          tilesize_draw, tilesize_draw, dst_draw_x, dst_draw_y);
2769       else
2770         BlitBitmap(src_bitmap, drawto, src_x, src_y,
2771                    tilesize_draw, tilesize_draw, dst_draw_x, dst_draw_y);
2772     }
2773     else
2774     {
2775       if (!masked)
2776         ClearRectangle(drawto, dst_draw_x, dst_draw_y,
2777                        tilesize_draw, tilesize_draw);
2778     }
2779   }
2780 }
2781
2782 void DrawSizedWallParts_MM(int x, int y, int element, int tilesize,
2783                            boolean masked, int element_bits_draw)
2784 {
2785   DrawSizedWallExt_MM(SX + x * tilesize, SY + y * tilesize,
2786                       element, tilesize, el2edimg, masked, element_bits_draw);
2787 }
2788
2789 static void DrawSizedWall_MM(int dst_x, int dst_y, int element, int tilesize,
2790                              int (*el2img_function)(int))
2791 {
2792   DrawSizedWallExt_MM(dst_x, dst_y, element, tilesize, el2img_function, FALSE,
2793                       0x000f);
2794 }
2795
2796 static void DrawSizedElementExt(int x, int y, int element, int tilesize,
2797                                 boolean masked)
2798 {
2799   if (IS_MM_WALL(element))
2800   {
2801     DrawSizedWallExt_MM(SX + x * tilesize, SY + y * tilesize,
2802                         element, tilesize, el2edimg, masked, 0x000f);
2803   }
2804   else
2805   {
2806     int graphic = el2edimg(element);
2807
2808     if (masked)
2809       DrawSizedGraphicThruMask(x, y, graphic, 0, tilesize);
2810     else
2811       DrawSizedGraphic(x, y, graphic, 0, tilesize);
2812   }
2813 }
2814
2815 void DrawSizedElement(int x, int y, int element, int tilesize)
2816 {
2817   DrawSizedElementExt(x, y, element, tilesize, FALSE);
2818 }
2819
2820 void DrawSizedElementThruMask(int x, int y, int element, int tilesize)
2821 {
2822   DrawSizedElementExt(x, y, element, tilesize, TRUE);
2823 }
2824
2825 void DrawMiniElement(int x, int y, int element)
2826 {
2827   int graphic;
2828
2829   graphic = el2edimg(element);
2830   DrawMiniGraphic(x, y, graphic);
2831 }
2832
2833 void DrawSizedElementOrWall(int sx, int sy, int scroll_x, int scroll_y,
2834                             int tilesize)
2835 {
2836   int x = sx + scroll_x, y = sy + scroll_y;
2837
2838   if (x < -1 || x > lev_fieldx || y < -1 || y > lev_fieldy)
2839     DrawSizedElement(sx, sy, EL_EMPTY, tilesize);
2840   else if (x > -1 && x < lev_fieldx && y > -1 && y < lev_fieldy)
2841     DrawSizedElement(sx, sy, Tile[x][y], tilesize);
2842   else
2843     DrawSizedGraphic(sx, sy, el2edimg(getBorderElement(x, y)), 0, tilesize);
2844 }
2845
2846 void DrawMiniElementOrWall(int sx, int sy, int scroll_x, int scroll_y)
2847 {
2848   int x = sx + scroll_x, y = sy + scroll_y;
2849
2850   if (x < -1 || x > lev_fieldx || y < -1 || y > lev_fieldy)
2851     DrawMiniElement(sx, sy, EL_EMPTY);
2852   else if (x > -1 && x < lev_fieldx && y > -1 && y < lev_fieldy)
2853     DrawMiniElement(sx, sy, Tile[x][y]);
2854   else
2855     DrawMiniGraphic(sx, sy, el2edimg(getBorderElement(x, y)));
2856 }
2857
2858 static void DrawEnvelopeBackgroundTiles(int graphic, int startx, int starty,
2859                                         int x, int y, int xsize, int ysize,
2860                                         int tile_width, int tile_height)
2861 {
2862   Bitmap *src_bitmap;
2863   int src_x, src_y;
2864   int dst_x = startx + x * tile_width;
2865   int dst_y = starty + y * tile_height;
2866   int width  = graphic_info[graphic].width;
2867   int height = graphic_info[graphic].height;
2868   int inner_width_raw  = MAX(width  - 2 * tile_width,  tile_width);
2869   int inner_height_raw = MAX(height - 2 * tile_height, tile_height);
2870   int inner_width  = inner_width_raw  - (inner_width_raw  % tile_width);
2871   int inner_height = inner_height_raw - (inner_height_raw % tile_height);
2872   int inner_sx = (width  >= 3 * tile_width  ? tile_width  : 0);
2873   int inner_sy = (height >= 3 * tile_height ? tile_height : 0);
2874   boolean draw_masked = graphic_info[graphic].draw_masked;
2875
2876   getFixedGraphicSource(graphic, 0, &src_bitmap, &src_x, &src_y);
2877
2878   if (src_bitmap == NULL || width < tile_width || height < tile_height)
2879   {
2880     ClearRectangle(drawto, dst_x, dst_y, tile_width, tile_height);
2881     return;
2882   }
2883
2884   src_x += (x == 0 ? 0 : x == xsize - 1 ? width  - tile_width  :
2885             inner_sx + (x - 1) * tile_width  % inner_width);
2886   src_y += (y == 0 ? 0 : y == ysize - 1 ? height - tile_height :
2887             inner_sy + (y - 1) * tile_height % inner_height);
2888
2889   if (draw_masked)
2890     BlitBitmapMasked(src_bitmap, drawto, src_x, src_y, tile_width, tile_height,
2891                      dst_x, dst_y);
2892   else
2893     BlitBitmap(src_bitmap, drawto, src_x, src_y, tile_width, tile_height,
2894                dst_x, dst_y);
2895 }
2896
2897 static void DrawEnvelopeBackground(int graphic, int startx, int starty,
2898                                    int x, int y, int xsize, int ysize,
2899                                    int font_nr)
2900 {
2901   int font_width  = getFontWidth(font_nr);
2902   int font_height = getFontHeight(font_nr);
2903
2904   DrawEnvelopeBackgroundTiles(graphic, startx, starty, x, y, xsize, ysize,
2905                               font_width, font_height);
2906 }
2907
2908 static void AnimateEnvelope(int envelope_nr, int anim_mode, int action)
2909 {
2910   int graphic = IMG_BACKGROUND_ENVELOPE_1 + envelope_nr;
2911   Bitmap *src_bitmap = graphic_info[graphic].bitmap;
2912   int mask_mode = (src_bitmap != NULL ? BLIT_MASKED : BLIT_ON_BACKGROUND);
2913   boolean ffwd_delay = (tape.playing && tape.fast_forward);
2914   boolean no_delay = (tape.warp_forward);
2915   int frame_delay_value = (ffwd_delay ? FfwdFrameDelay : GameFrameDelay);
2916   int anim_delay_value = MAX(1, (no_delay ? 0 : frame_delay_value) / 2);
2917   DelayCounter anim_delay = { anim_delay_value };
2918   int font_nr = FONT_ENVELOPE_1 + envelope_nr;
2919   int font_width = getFontWidth(font_nr);
2920   int font_height = getFontHeight(font_nr);
2921   int max_xsize = level.envelope[envelope_nr].xsize;
2922   int max_ysize = level.envelope[envelope_nr].ysize;
2923   int xstart = (anim_mode & ANIM_VERTICAL ? max_xsize : 0);
2924   int ystart = (anim_mode & ANIM_HORIZONTAL ? max_ysize : 0);
2925   int xend = max_xsize;
2926   int yend = (anim_mode != ANIM_DEFAULT ? max_ysize : 0);
2927   int xstep = (xstart < xend ? 1 : 0);
2928   int ystep = (ystart < yend || xstep == 0 ? 1 : 0);
2929   int start = 0;
2930   int end = MAX(xend - xstart, yend - ystart);
2931   int i;
2932
2933   for (i = start; i <= end; i++)
2934   {
2935     int last_frame = end;       // last frame of this "for" loop
2936     int x = xstart + i * xstep;
2937     int y = ystart + i * ystep;
2938     int xsize = (action == ACTION_CLOSING ? xend - (x - xstart) : x) + 2;
2939     int ysize = (action == ACTION_CLOSING ? yend - (y - ystart) : y) + 2;
2940     int sx = SX + (SXSIZE - xsize * font_width)  / 2;
2941     int sy = SY + (SYSIZE - ysize * font_height) / 2;
2942     int xx, yy;
2943
2944     SetDrawtoField(DRAW_TO_FIELDBUFFER);
2945
2946     BlitScreenToBitmap(backbuffer);
2947
2948     SetDrawtoField(DRAW_TO_BACKBUFFER);
2949
2950     for (yy = 0; yy < ysize; yy++)
2951       for (xx = 0; xx < xsize; xx++)
2952         DrawEnvelopeBackground(graphic, sx, sy, xx, yy, xsize, ysize, font_nr);
2953
2954     DrawTextArea(sx + font_width, sy + font_height,
2955                  level.envelope[envelope_nr].text, font_nr, max_xsize,
2956                  xsize - 2, ysize - 2, 0, mask_mode,
2957                  level.envelope[envelope_nr].autowrap,
2958                  level.envelope[envelope_nr].centered, FALSE);
2959
2960     redraw_mask |= REDRAW_FIELD;
2961     BackToFront();
2962
2963     SkipUntilDelayReached(&anim_delay, &i, last_frame);
2964   }
2965
2966   ClearAutoRepeatKeyEvents();
2967 }
2968
2969 void ShowEnvelope(int envelope_nr)
2970 {
2971   int element = EL_ENVELOPE_1 + envelope_nr;
2972   int graphic = IMG_BACKGROUND_ENVELOPE_1 + envelope_nr;
2973   int sound_opening = element_info[element].sound[ACTION_OPENING];
2974   int sound_closing = element_info[element].sound[ACTION_CLOSING];
2975   boolean ffwd_delay = (tape.playing && tape.fast_forward);
2976   boolean no_delay = (tape.warp_forward);
2977   int normal_delay_value = ONE_SECOND_DELAY / (ffwd_delay ? 2 : 1);
2978   int wait_delay_value = (no_delay ? 0 : normal_delay_value);
2979   int anim_mode = graphic_info[graphic].anim_mode;
2980   int main_anim_mode = (anim_mode == ANIM_NONE ? ANIM_VERTICAL|ANIM_HORIZONTAL:
2981                         anim_mode == ANIM_DEFAULT ? ANIM_VERTICAL : anim_mode);
2982   boolean overlay_enabled = GetOverlayEnabled();
2983
2984   game.envelope_active = TRUE;  // needed for RedrawPlayfield() events
2985
2986   SetOverlayEnabled(FALSE);
2987   UnmapAllGadgets();
2988
2989   PlayMenuSoundStereo(sound_opening, SOUND_MIDDLE);
2990
2991   if (anim_mode == ANIM_DEFAULT)
2992     AnimateEnvelope(envelope_nr, ANIM_DEFAULT, ACTION_OPENING);
2993
2994   AnimateEnvelope(envelope_nr, main_anim_mode, ACTION_OPENING);
2995
2996   if (tape.playing)
2997     Delay_WithScreenUpdates(wait_delay_value);
2998   else
2999     WaitForEventToContinue();
3000
3001   RemapAllGadgets();
3002   SetOverlayEnabled(overlay_enabled);
3003
3004   PlayMenuSoundStereo(sound_closing, SOUND_MIDDLE);
3005
3006   if (anim_mode != ANIM_NONE)
3007     AnimateEnvelope(envelope_nr, main_anim_mode, ACTION_CLOSING);
3008
3009   if (anim_mode == ANIM_DEFAULT)
3010     AnimateEnvelope(envelope_nr, ANIM_DEFAULT, ACTION_CLOSING);
3011
3012   game.envelope_active = FALSE;
3013
3014   SetDrawtoField(DRAW_TO_FIELDBUFFER);
3015
3016   redraw_mask |= REDRAW_FIELD;
3017   BackToFront();
3018 }
3019
3020 static void PrepareEnvelopeRequestToScreen(Bitmap *bitmap, int sx, int sy,
3021                                            int xsize, int ysize)
3022 {
3023   if (!global.use_envelope_request)
3024     return;
3025
3026   if (request.bitmap == NULL ||
3027       xsize > request.xsize ||
3028       ysize > request.ysize)
3029   {
3030     if (request.bitmap != NULL)
3031       FreeBitmap(request.bitmap);
3032
3033     request.bitmap = CreateBitmap(xsize, ysize, DEFAULT_DEPTH);
3034
3035     SDL_Surface *surface = request.bitmap->surface;
3036
3037     if ((request.bitmap->surface_masked = SDLGetNativeSurface(surface)) == NULL)
3038       Fail("SDLGetNativeSurface() failed");
3039   }
3040
3041   BlitBitmap(bitmap, request.bitmap, sx, sy, xsize, ysize, 0, 0);
3042
3043   // create masked surface for request bitmap, if needed
3044   if (graphic_info[IMG_BACKGROUND_REQUEST].draw_masked)
3045   {
3046     SDL_Surface *surface        = request.bitmap->surface;
3047     SDL_Surface *surface_masked = request.bitmap->surface_masked;
3048
3049     SDLBlitSurface(surface, surface_masked, 0, 0, xsize, ysize, 0, 0);
3050     SDL_SetColorKey(surface_masked, SET_TRANSPARENT_PIXEL,
3051                     SDL_MapRGB(surface_masked->format, 0x00, 0x00, 0x00));
3052   }
3053
3054   SDLFreeBitmapTextures(request.bitmap);
3055   SDLCreateBitmapTextures(request.bitmap);
3056
3057   // set envelope request run-time values
3058   request.sx = sx;
3059   request.sy = sy;
3060   request.xsize = xsize;
3061   request.ysize = ysize;
3062 }
3063
3064 void DrawEnvelopeRequestToScreen(int drawing_target)
3065 {
3066   if (global.use_envelope_request &&
3067       game.request_active &&
3068       drawing_target == DRAW_TO_SCREEN)
3069   {
3070     if (graphic_info[IMG_BACKGROUND_REQUEST].draw_masked)
3071       BlitToScreenMasked(request.bitmap, 0, 0, request.xsize, request.ysize,
3072                          request.sx, request.sy);
3073     else
3074       BlitToScreen(request.bitmap, 0, 0, request.xsize, request.ysize,
3075                    request.sx, request.sy);
3076   }
3077 }
3078
3079 static void setRequestBasePosition(int *x, int *y)
3080 {
3081   int sx_base, sy_base;
3082
3083   if (request.x != -1)
3084     sx_base = request.x;
3085   else if (request.align == ALIGN_LEFT)
3086     sx_base = SX;
3087   else if (request.align == ALIGN_RIGHT)
3088     sx_base = SX + SXSIZE;
3089   else
3090     sx_base = SX + SXSIZE / 2;
3091
3092   if (request.y != -1)
3093     sy_base = request.y;
3094   else if (request.valign == VALIGN_TOP)
3095     sy_base = SY;
3096   else if (request.valign == VALIGN_BOTTOM)
3097     sy_base = SY + SYSIZE;
3098   else
3099     sy_base = SY + SYSIZE / 2;
3100
3101   *x = sx_base;
3102   *y = sy_base;
3103 }
3104
3105 static void setRequestPositionExt(int *x, int *y, int width, int height,
3106                                   boolean add_border_size)
3107 {
3108   int border_size = request.border_size;
3109   int sx_base, sy_base;
3110   int sx, sy;
3111
3112   setRequestBasePosition(&sx_base, &sy_base);
3113
3114   if (request.align == ALIGN_LEFT)
3115     sx = sx_base;
3116   else if (request.align == ALIGN_RIGHT)
3117     sx = sx_base - width;
3118   else
3119     sx = sx_base - width  / 2;
3120
3121   if (request.valign == VALIGN_TOP)
3122     sy = sy_base;
3123   else if (request.valign == VALIGN_BOTTOM)
3124     sy = sy_base - height;
3125   else
3126     sy = sy_base - height / 2;
3127
3128   sx = MAX(0, MIN(sx, WIN_XSIZE - width));
3129   sy = MAX(0, MIN(sy, WIN_YSIZE - height));
3130
3131   if (add_border_size)
3132   {
3133     sx += border_size;
3134     sy += border_size;
3135   }
3136
3137   *x = sx;
3138   *y = sy;
3139 }
3140
3141 static void setRequestPosition(int *x, int *y, boolean add_border_size)
3142 {
3143   setRequestPositionExt(x, y, request.width, request.height, add_border_size);
3144 }
3145
3146 static void DrawEnvelopeRequest(char *text, unsigned int req_state)
3147 {
3148   DrawBuffer *drawto_last = drawto;
3149   char *text_final = text;
3150   char *text_door_style = NULL;
3151   int graphic = IMG_BACKGROUND_REQUEST;
3152   Bitmap *src_bitmap = graphic_info[graphic].bitmap;
3153   int mask_mode = (src_bitmap != NULL ? BLIT_MASKED : BLIT_ON_BACKGROUND);
3154   int font_nr = FONT_REQUEST;
3155   int font_width = getFontWidth(font_nr);
3156   int font_height = getFontHeight(font_nr);
3157   int border_size = request.border_size;
3158   int line_spacing = request.line_spacing;
3159   int line_height = font_height + line_spacing;
3160   int max_text_width  = request.width  - 2 * border_size;
3161   int max_text_height = request.height - 2 * border_size;
3162   int line_length = max_text_width  / font_width;
3163   int max_lines   = max_text_height / line_height;
3164   int text_width = line_length * font_width;
3165   int width = request.width;
3166   int height = request.height;
3167   int tile_size = MAX(request.step_offset, 1);
3168   int x_steps = width  / tile_size;
3169   int y_steps = height / tile_size;
3170   int sx_offset = border_size;
3171   int sy_offset = border_size;
3172   int sx, sy;
3173   int x, y;
3174
3175   if (request.centered)
3176     sx_offset = (request.width - text_width) / 2;
3177
3178   if (request.wrap_single_words && !request.autowrap)
3179   {
3180     char *src_text_ptr, *dst_text_ptr;
3181
3182     text_door_style = checked_malloc(2 * strlen(text) + 1);
3183
3184     src_text_ptr = text;
3185     dst_text_ptr = text_door_style;
3186
3187     while (*src_text_ptr)
3188     {
3189       if (*src_text_ptr == ' ' ||
3190           *src_text_ptr == '?' ||
3191           *src_text_ptr == '!')
3192         *dst_text_ptr++ = '\n';
3193
3194       if (*src_text_ptr != ' ')
3195         *dst_text_ptr++ = *src_text_ptr;
3196
3197       src_text_ptr++;
3198     }
3199
3200     *dst_text_ptr = '\0';
3201
3202     text_final = text_door_style;
3203   }
3204
3205   setRequestPosition(&sx, &sy, FALSE);
3206
3207   // draw complete envelope request to temporary bitmap
3208   drawto = bitmap_db_store_1;
3209
3210   ClearRectangle(drawto, sx, sy, width, height);
3211
3212   for (y = 0; y < y_steps; y++)
3213     for (x = 0; x < x_steps; x++)
3214       DrawEnvelopeBackgroundTiles(graphic, sx, sy,
3215                                   x, y, x_steps, y_steps,
3216                                   tile_size, tile_size);
3217
3218   // force DOOR font inside door area
3219   SetFontStatus(GAME_MODE_PSEUDO_DOOR);
3220
3221   DrawTextBuffer(sx + sx_offset, sy + sy_offset, text_final, font_nr,
3222                  line_length, -1, max_lines, line_spacing, mask_mode,
3223                  request.autowrap, request.centered, FALSE);
3224
3225   ResetFontStatus();
3226
3227   MapToolButtons(req_state);
3228
3229   // restore pointer to drawing buffer
3230   drawto = drawto_last;
3231
3232   // prepare complete envelope request from temporary bitmap
3233   PrepareEnvelopeRequestToScreen(bitmap_db_store_1, sx, sy, width, height);
3234
3235   if (text_door_style)
3236     free(text_door_style);
3237 }
3238
3239 static void AnimateEnvelopeRequest(int anim_mode, int action)
3240 {
3241   boolean game_ended = (game_status == GAME_MODE_PLAYING && checkGameEnded());
3242   int delay_value_normal = request.step_delay;
3243   int delay_value_fast = delay_value_normal / 2;
3244   boolean ffwd_delay = (tape.playing && tape.fast_forward);
3245   boolean no_delay = (tape.warp_forward);
3246   int delay_value = (ffwd_delay ? delay_value_fast : delay_value_normal);
3247   int anim_delay_value = MAX(1, (no_delay ? 0 : delay_value + 500 * 0) / 2);
3248   DelayCounter anim_delay = { anim_delay_value };
3249
3250   int tile_size = MAX(request.step_offset, 1);
3251   int max_xsize = request.width  / tile_size;
3252   int max_ysize = request.height / tile_size;
3253   int max_xsize_inner = max_xsize - 2;
3254   int max_ysize_inner = max_ysize - 2;
3255
3256   int xstart = (anim_mode & ANIM_VERTICAL ? max_xsize_inner : 0);
3257   int ystart = (anim_mode & ANIM_HORIZONTAL ? max_ysize_inner : 0);
3258   int xend = max_xsize_inner;
3259   int yend = (anim_mode != ANIM_DEFAULT ? max_ysize_inner : 0);
3260   int xstep = (xstart < xend ? 1 : 0);
3261   int ystep = (ystart < yend || xstep == 0 ? 1 : 0);
3262   int start = 0;
3263   int end = MAX(xend - xstart, yend - ystart);
3264   int i;
3265
3266   if (setup.quick_doors)
3267   {
3268     xstart = xend;
3269     ystart = yend;
3270     end = 0;
3271   }
3272
3273   for (i = start; i <= end; i++)
3274   {
3275     int last_frame = end;       // last frame of this "for" loop
3276     int x = xstart + i * xstep;
3277     int y = ystart + i * ystep;
3278     int xsize = (action == ACTION_CLOSING ? xend - (x - xstart) : x) + 2;
3279     int ysize = (action == ACTION_CLOSING ? yend - (y - ystart) : y) + 2;
3280     int xsize_size_left = (xsize - 1) * tile_size;
3281     int ysize_size_top  = (ysize - 1) * tile_size;
3282     int max_xsize_pos = (max_xsize - 1) * tile_size;
3283     int max_ysize_pos = (max_ysize - 1) * tile_size;
3284     int width  = xsize * tile_size;
3285     int height = ysize * tile_size;
3286     int src_x, src_y;
3287     int dst_x, dst_y;
3288     int xx, yy;
3289
3290     if (game_ended)
3291       HandleGameActions();
3292
3293     setRequestPosition(&src_x, &src_y, FALSE);
3294     setRequestPositionExt(&dst_x, &dst_y, width, height, FALSE);
3295
3296     for (yy = 0; yy < 2; yy++)
3297     {
3298       for (xx = 0; xx < 2; xx++)
3299       {
3300         int src_xx = src_x + xx * max_xsize_pos;
3301         int src_yy = src_y + yy * max_ysize_pos;
3302         int dst_xx = dst_x + xx * xsize_size_left;
3303         int dst_yy = dst_y + yy * ysize_size_top;
3304         int xx_size = (xx ? tile_size : xsize_size_left);
3305         int yy_size = (yy ? tile_size : ysize_size_top);
3306
3307         // draw partial (animated) envelope request to temporary bitmap
3308         BlitBitmap(bitmap_db_store_1, bitmap_db_store_2,
3309                    src_xx, src_yy, xx_size, yy_size, dst_xx, dst_yy);
3310       }
3311     }
3312
3313     // prepare partial (animated) envelope request from temporary bitmap
3314     PrepareEnvelopeRequestToScreen(bitmap_db_store_2, dst_x, dst_y,
3315                                    width, height);
3316
3317     redraw_mask |= REDRAW_FIELD;
3318
3319     BackToFront();
3320
3321     SkipUntilDelayReached(&anim_delay, &i, last_frame);
3322   }
3323
3324   ClearAutoRepeatKeyEvents();
3325 }
3326
3327 static void ShowEnvelopeRequest(char *text, unsigned int req_state, int action)
3328 {
3329   int graphic = IMG_BACKGROUND_REQUEST;
3330   int sound_opening = SND_REQUEST_OPENING;
3331   int sound_closing = SND_REQUEST_CLOSING;
3332   int anim_mode_1 = request.anim_mode;                  // (higher priority)
3333   int anim_mode_2 = graphic_info[graphic].anim_mode;    // (lower priority)
3334   int anim_mode = (anim_mode_1 != ANIM_DEFAULT ? anim_mode_1 : anim_mode_2);
3335   int main_anim_mode = (anim_mode == ANIM_NONE ? ANIM_VERTICAL|ANIM_HORIZONTAL:
3336                         anim_mode == ANIM_DEFAULT ? ANIM_VERTICAL : anim_mode);
3337
3338   game.envelope_active = TRUE;  // needed for RedrawPlayfield() events
3339
3340   if (action == ACTION_OPENING)
3341   {
3342     PlayMenuSoundStereo(sound_opening, SOUND_MIDDLE);
3343
3344     if (anim_mode == ANIM_DEFAULT)
3345       AnimateEnvelopeRequest(ANIM_DEFAULT, ACTION_OPENING);
3346
3347     AnimateEnvelopeRequest(main_anim_mode, ACTION_OPENING);
3348   }
3349   else
3350   {
3351     PlayMenuSoundStereo(sound_closing, SOUND_MIDDLE);
3352
3353     if (anim_mode != ANIM_NONE)
3354       AnimateEnvelopeRequest(main_anim_mode, ACTION_CLOSING);
3355
3356     if (anim_mode == ANIM_DEFAULT)
3357       AnimateEnvelopeRequest(ANIM_DEFAULT, ACTION_CLOSING);
3358   }
3359
3360   game.envelope_active = FALSE;
3361 }
3362
3363 static void DrawPreviewElement(int dst_x, int dst_y, int element, int tilesize)
3364 {
3365   if (IS_MM_WALL(element))
3366   {
3367     DrawSizedWall_MM(dst_x, dst_y, element, tilesize, el2preimg);
3368   }
3369   else
3370   {
3371     Bitmap *src_bitmap;
3372     int src_x, src_y;
3373     int graphic = el2preimg(element);
3374
3375     getSizedGraphicSource(graphic, 0, tilesize, &src_bitmap, &src_x, &src_y);
3376     BlitBitmap(src_bitmap, drawto, src_x, src_y, tilesize, tilesize,
3377                dst_x, dst_y);
3378   }
3379 }
3380
3381 void DrawLevel(int draw_background_mask)
3382 {
3383   int x, y;
3384
3385   SetMainBackgroundImage(IMG_BACKGROUND_PLAYING);
3386   SetDrawBackgroundMask(draw_background_mask);
3387
3388   ClearField();
3389
3390   for (x = BX1; x <= BX2; x++)
3391     for (y = BY1; y <= BY2; y++)
3392       DrawScreenField(x, y);
3393
3394   redraw_mask |= REDRAW_FIELD;
3395 }
3396
3397 void DrawSizedLevel(int size_x, int size_y, int scroll_x, int scroll_y,
3398                     int tilesize)
3399 {
3400   int x, y;
3401
3402   for (x = 0; x < size_x; x++)
3403     for (y = 0; y < size_y; y++)
3404       DrawSizedElementOrWall(x, y, scroll_x, scroll_y, tilesize);
3405
3406   redraw_mask |= REDRAW_FIELD;
3407 }
3408
3409 void DrawMiniLevel(int size_x, int size_y, int scroll_x, int scroll_y)
3410 {
3411   int x, y;
3412
3413   for (x = 0; x < size_x; x++)
3414     for (y = 0; y < size_y; y++)
3415       DrawMiniElementOrWall(x, y, scroll_x, scroll_y);
3416
3417   redraw_mask |= REDRAW_FIELD;
3418 }
3419
3420 static void DrawPreviewLevelPlayfield(int from_x, int from_y)
3421 {
3422   boolean show_level_border = (BorderElement != EL_EMPTY);
3423   int level_xsize = lev_fieldx + (show_level_border ? 2 : 0);
3424   int level_ysize = lev_fieldy + (show_level_border ? 2 : 0);
3425   int tile_size = preview.tile_size;
3426   int preview_width  = preview.xsize * tile_size;
3427   int preview_height = preview.ysize * tile_size;
3428   int real_preview_xsize = MIN(level_xsize, preview.xsize);
3429   int real_preview_ysize = MIN(level_ysize, preview.ysize);
3430   int real_preview_width  = real_preview_xsize * tile_size;
3431   int real_preview_height = real_preview_ysize * tile_size;
3432   int dst_x = SX + ALIGNED_XPOS(preview.x, preview_width, preview.align);
3433   int dst_y = SY + ALIGNED_YPOS(preview.y, preview_height, preview.valign);
3434   int x, y;
3435
3436   if (!IN_GFX_FIELD_FULL(dst_x, dst_y + preview_height - 1))
3437     return;
3438
3439   DrawBackground(dst_x, dst_y, preview_width, preview_height);
3440
3441   dst_x += (preview_width  - real_preview_width)  / 2;
3442   dst_y += (preview_height - real_preview_height) / 2;
3443
3444   for (x = 0; x < real_preview_xsize; x++)
3445   {
3446     for (y = 0; y < real_preview_ysize; y++)
3447     {
3448       int lx = from_x + x + (show_level_border ? -1 : 0);
3449       int ly = from_y + y + (show_level_border ? -1 : 0);
3450       int element = (IN_LEV_FIELD(lx, ly) ? level.field[lx][ly] :
3451                      getBorderElement(lx, ly));
3452
3453       DrawPreviewElement(dst_x + x * tile_size, dst_y + y * tile_size,
3454                          element, tile_size);
3455     }
3456   }
3457
3458   redraw_mask |= REDRAW_FIELD;
3459 }
3460
3461 #define MICROLABEL_EMPTY                0
3462 #define MICROLABEL_LEVEL_NAME           1
3463 #define MICROLABEL_LEVEL_AUTHOR_HEAD    2
3464 #define MICROLABEL_LEVEL_AUTHOR         3
3465 #define MICROLABEL_IMPORTED_FROM_HEAD   4
3466 #define MICROLABEL_IMPORTED_FROM        5
3467 #define MICROLABEL_IMPORTED_BY_HEAD     6
3468 #define MICROLABEL_IMPORTED_BY          7
3469
3470 static int getMaxTextLength(struct TextPosInfo *pos, int font_nr)
3471 {
3472   int max_text_width = SXSIZE;
3473   int font_width = getFontWidth(font_nr);
3474
3475   if (pos->align == ALIGN_CENTER)
3476     max_text_width = (pos->x < SXSIZE / 2 ? pos->x * 2 : (SXSIZE - pos->x) * 2);
3477   else if (pos->align == ALIGN_RIGHT)
3478     max_text_width = pos->x;
3479   else
3480     max_text_width = SXSIZE - pos->x;
3481
3482   return max_text_width / font_width;
3483 }
3484
3485 static void DrawPreviewLevelLabelExt(int mode, struct TextPosInfo *pos)
3486 {
3487   char label_text[MAX_OUTPUT_LINESIZE + 1];
3488   int max_len_label_text;
3489   int font_nr = pos->font;
3490   int i;
3491
3492   if (!IN_GFX_FIELD_FULL(pos->x, pos->y + getFontHeight(pos->font)))
3493     return;
3494
3495   if (mode == MICROLABEL_LEVEL_AUTHOR_HEAD ||
3496       mode == MICROLABEL_IMPORTED_FROM_HEAD ||
3497       mode == MICROLABEL_IMPORTED_BY_HEAD)
3498     font_nr = pos->font_alt;
3499
3500   max_len_label_text = getMaxTextLength(pos, font_nr);
3501
3502   if (pos->size != -1)
3503     max_len_label_text = pos->size;
3504
3505   for (i = 0; i < max_len_label_text; i++)
3506     label_text[i] = ' ';
3507   label_text[max_len_label_text] = '\0';
3508
3509   if (strlen(label_text) > 0)
3510     DrawTextSAligned(pos->x, pos->y, label_text, font_nr, pos->align);
3511
3512   strncpy(label_text,
3513           (mode == MICROLABEL_LEVEL_NAME ? level.name :
3514            mode == MICROLABEL_LEVEL_AUTHOR_HEAD ? "created by" :
3515            mode == MICROLABEL_LEVEL_AUTHOR ? level.author :
3516            mode == MICROLABEL_IMPORTED_FROM_HEAD ? "imported from" :
3517            mode == MICROLABEL_IMPORTED_FROM ? leveldir_current->imported_from :
3518            mode == MICROLABEL_IMPORTED_BY_HEAD ? "imported by" :
3519            mode == MICROLABEL_IMPORTED_BY ? leveldir_current->imported_by :""),
3520           max_len_label_text);
3521   label_text[max_len_label_text] = '\0';
3522
3523   if (strlen(label_text) > 0)
3524     DrawTextSAligned(pos->x, pos->y, label_text, font_nr, pos->align);
3525
3526   redraw_mask |= REDRAW_FIELD;
3527 }
3528
3529 static void DrawPreviewLevelLabel(int mode)
3530 {
3531   DrawPreviewLevelLabelExt(mode, &menu.main.text.level_info_2);
3532 }
3533
3534 static void DrawPreviewLevelInfo(int mode)
3535 {
3536   if (mode == MICROLABEL_LEVEL_NAME)
3537     DrawPreviewLevelLabelExt(mode, &menu.main.text.level_name);
3538   else if (mode == MICROLABEL_LEVEL_AUTHOR)
3539     DrawPreviewLevelLabelExt(mode, &menu.main.text.level_author);
3540 }
3541
3542 static void DrawPreviewLevelExt(boolean restart)
3543 {
3544   static DelayCounter scroll_delay = { 0 };
3545   static DelayCounter label_delay = { 0 };
3546   static int from_x, from_y, scroll_direction;
3547   static int label_state, label_counter;
3548   boolean show_level_border = (BorderElement != EL_EMPTY);
3549   int level_xsize = lev_fieldx + (show_level_border ? 2 : 0);
3550   int level_ysize = lev_fieldy + (show_level_border ? 2 : 0);
3551
3552   scroll_delay.value = preview.step_delay;
3553   label_delay.value = MICROLEVEL_LABEL_DELAY;
3554
3555   if (restart)
3556   {
3557     from_x = 0;
3558     from_y = 0;
3559
3560     if (preview.anim_mode == ANIM_CENTERED)
3561     {
3562       if (level_xsize > preview.xsize)
3563         from_x = (level_xsize - preview.xsize) / 2;
3564       if (level_ysize > preview.ysize)
3565         from_y = (level_ysize - preview.ysize) / 2;
3566     }
3567
3568     from_x += preview.xoffset;
3569     from_y += preview.yoffset;
3570
3571     scroll_direction = MV_RIGHT;
3572     label_state = 1;
3573     label_counter = 0;
3574
3575     DrawPreviewLevelPlayfield(from_x, from_y);
3576     DrawPreviewLevelLabel(label_state);
3577
3578     DrawPreviewLevelInfo(MICROLABEL_LEVEL_NAME);
3579     DrawPreviewLevelInfo(MICROLABEL_LEVEL_AUTHOR);
3580
3581     // initialize delay counters
3582     ResetDelayCounter(&scroll_delay);
3583     ResetDelayCounter(&label_delay);
3584
3585     if (leveldir_current->name)
3586     {
3587       struct TextPosInfo *pos = &menu.main.text.level_info_1;
3588       char label_text[MAX_OUTPUT_LINESIZE + 1];
3589       int font_nr = pos->font;
3590       int max_len_label_text = getMaxTextLength(pos, font_nr);
3591
3592       if (pos->size != -1)
3593         max_len_label_text = pos->size;
3594
3595       strncpy(label_text, leveldir_current->name, max_len_label_text);
3596       label_text[max_len_label_text] = '\0';
3597
3598       if (IN_GFX_FIELD_FULL(pos->x, pos->y + getFontHeight(pos->font)))
3599         DrawTextSAligned(pos->x, pos->y, label_text, font_nr, pos->align);
3600     }
3601
3602     return;
3603   }
3604
3605   // scroll preview level, if needed
3606   if (preview.anim_mode != ANIM_NONE &&
3607       (level_xsize > preview.xsize || level_ysize > preview.ysize) &&
3608       DelayReached(&scroll_delay))
3609   {
3610     switch (scroll_direction)
3611     {
3612       case MV_LEFT:
3613         if (from_x > 0)
3614         {
3615           from_x -= preview.step_offset;
3616           from_x = (from_x < 0 ? 0 : from_x);
3617         }
3618         else
3619           scroll_direction = MV_UP;
3620         break;
3621
3622       case MV_RIGHT:
3623         if (from_x < level_xsize - preview.xsize)
3624         {
3625           from_x += preview.step_offset;
3626           from_x = (from_x > level_xsize - preview.xsize ?
3627                     level_xsize - preview.xsize : from_x);
3628         }
3629         else
3630           scroll_direction = MV_DOWN;
3631         break;
3632
3633       case MV_UP:
3634         if (from_y > 0)
3635         {
3636           from_y -= preview.step_offset;
3637           from_y = (from_y < 0 ? 0 : from_y);
3638         }
3639         else
3640           scroll_direction = MV_RIGHT;
3641         break;
3642
3643       case MV_DOWN:
3644         if (from_y < level_ysize - preview.ysize)
3645         {
3646           from_y += preview.step_offset;
3647           from_y = (from_y > level_ysize - preview.ysize ?
3648                     level_ysize - preview.ysize : from_y);
3649         }
3650         else
3651           scroll_direction = MV_LEFT;
3652         break;
3653
3654       default:
3655         break;
3656     }
3657
3658     DrawPreviewLevelPlayfield(from_x, from_y);
3659   }
3660
3661   // !!! THIS ALL SUCKS -- SHOULD BE CLEANLY REWRITTEN !!!
3662   // redraw micro level label, if needed
3663   if (!strEqual(level.name, NAMELESS_LEVEL_NAME) &&
3664       !strEqual(level.author, ANONYMOUS_NAME) &&
3665       !strEqual(level.author, leveldir_current->name) &&
3666       DelayReached(&label_delay))
3667   {
3668     int max_label_counter = 23;
3669
3670     if (leveldir_current->imported_from != NULL &&
3671         strlen(leveldir_current->imported_from) > 0)
3672       max_label_counter += 14;
3673     if (leveldir_current->imported_by != NULL &&
3674         strlen(leveldir_current->imported_by) > 0)
3675       max_label_counter += 14;
3676
3677     label_counter = (label_counter + 1) % max_label_counter;
3678     label_state = (label_counter >= 0 && label_counter <= 7 ?
3679                    MICROLABEL_LEVEL_NAME :
3680                    label_counter >= 9 && label_counter <= 12 ?
3681                    MICROLABEL_LEVEL_AUTHOR_HEAD :
3682                    label_counter >= 14 && label_counter <= 21 ?
3683                    MICROLABEL_LEVEL_AUTHOR :
3684                    label_counter >= 23 && label_counter <= 26 ?
3685                    MICROLABEL_IMPORTED_FROM_HEAD :
3686                    label_counter >= 28 && label_counter <= 35 ?
3687                    MICROLABEL_IMPORTED_FROM :
3688                    label_counter >= 37 && label_counter <= 40 ?
3689                    MICROLABEL_IMPORTED_BY_HEAD :
3690                    label_counter >= 42 && label_counter <= 49 ?
3691                    MICROLABEL_IMPORTED_BY : MICROLABEL_EMPTY);
3692
3693     if (leveldir_current->imported_from == NULL &&
3694         (label_state == MICROLABEL_IMPORTED_FROM_HEAD ||
3695          label_state == MICROLABEL_IMPORTED_FROM))
3696       label_state = (label_state == MICROLABEL_IMPORTED_FROM_HEAD ?
3697                      MICROLABEL_IMPORTED_BY_HEAD : MICROLABEL_IMPORTED_BY);
3698
3699     DrawPreviewLevelLabel(label_state);
3700   }
3701 }
3702
3703 void DrawPreviewPlayers(void)
3704 {
3705   if (game_status != GAME_MODE_MAIN)
3706     return;
3707
3708   // do not draw preview players if level preview redefined, but players aren't
3709   if (preview.redefined && !menu.main.preview_players.redefined)
3710     return;
3711
3712   boolean player_found[MAX_PLAYERS];
3713   int num_players = 0;
3714   int i, x, y;
3715
3716   for (i = 0; i < MAX_PLAYERS; i++)
3717     player_found[i] = FALSE;
3718
3719   // check which players can be found in the level (simple approach)
3720   for (x = 0; x < lev_fieldx; x++)
3721   {
3722     for (y = 0; y < lev_fieldy; y++)
3723     {
3724       int element = level.field[x][y];
3725
3726       if (IS_PLAYER_ELEMENT(element))
3727       {
3728         int player_nr = GET_PLAYER_NR(element);
3729
3730         player_nr = MIN(MAX(0, player_nr), MAX_PLAYERS - 1);
3731
3732         if (!player_found[player_nr])
3733           num_players++;
3734
3735         player_found[player_nr] = TRUE;
3736       }
3737     }
3738   }
3739
3740   struct TextPosInfo *pos = &menu.main.preview_players;
3741   int tile_size = pos->tile_size;
3742   int border_size = pos->border_size;
3743   int player_xoffset_raw = (pos->vertical ? 0 : tile_size + border_size);
3744   int player_yoffset_raw = (pos->vertical ? tile_size + border_size : 0);
3745   int player_xoffset = (pos->xoffset != -1 ? pos->xoffset : player_xoffset_raw);
3746   int player_yoffset = (pos->yoffset != -1 ? pos->yoffset : player_yoffset_raw);
3747   int max_players_width  = (MAX_PLAYERS - 1) * player_xoffset + tile_size;
3748   int max_players_height = (MAX_PLAYERS - 1) * player_yoffset + tile_size;
3749   int all_players_width  = (num_players - 1) * player_xoffset + tile_size;
3750   int all_players_height = (num_players - 1) * player_yoffset + tile_size;
3751   int max_xpos = SX + ALIGNED_XPOS(pos->x, max_players_width,  pos->align);
3752   int max_ypos = SY + ALIGNED_YPOS(pos->y, max_players_height, pos->valign);
3753   int xpos = SX + ALIGNED_XPOS(pos->x, all_players_width,  pos->align);
3754   int ypos = SY + ALIGNED_YPOS(pos->y, all_players_height, pos->valign);
3755
3756   // clear area in which the players will be drawn
3757   ClearRectangleOnBackground(drawto, max_xpos, max_ypos,
3758                              max_players_width, max_players_height);
3759
3760   if (!network.enabled && !setup.team_mode)
3761     return;
3762
3763   // only draw players if level is suited for team mode
3764   if (num_players < 2)
3765     return;
3766
3767   // draw all players that were found in the level
3768   for (i = 0; i < MAX_PLAYERS; i++)
3769   {
3770     if (player_found[i])
3771     {
3772       int graphic = el2img(EL_PLAYER_1 + i);
3773
3774       DrawSizedGraphicThruMaskExt(drawto, xpos, ypos, graphic, 0, tile_size);
3775
3776       xpos += player_xoffset;
3777       ypos += player_yoffset;
3778     }
3779   }
3780 }
3781
3782 void DrawPreviewLevelInitial(void)
3783 {
3784   DrawPreviewLevelExt(TRUE);
3785   DrawPreviewPlayers();
3786 }
3787
3788 void DrawPreviewLevelAnimation(void)
3789 {
3790   DrawPreviewLevelExt(FALSE);
3791 }
3792
3793 static void DrawNetworkPlayer(int x, int y, int player_nr, int tile_size,
3794                               int border_size, int font_nr)
3795 {
3796   int graphic = el2img(EL_PLAYER_1 + player_nr);
3797   int font_height = getFontHeight(font_nr);
3798   int player_height = MAX(tile_size, font_height);
3799   int xoffset_text = tile_size + border_size;
3800   int yoffset_text    = (player_height - font_height) / 2;
3801   int yoffset_graphic = (player_height - tile_size) / 2;
3802   char *player_name = getNetworkPlayerName(player_nr + 1);
3803
3804   DrawSizedGraphicThruMaskExt(drawto, x, y + yoffset_graphic, graphic, 0,
3805                               tile_size);
3806   DrawText(x + xoffset_text, y + yoffset_text, player_name, font_nr);
3807 }
3808
3809 static void DrawNetworkPlayersExt(boolean force)
3810 {
3811   if (game_status != GAME_MODE_MAIN)
3812     return;
3813
3814   if (!network.connected && !force)
3815     return;
3816
3817   // do not draw network players if level preview redefined, but players aren't
3818   if (preview.redefined && !menu.main.network_players.redefined)
3819     return;
3820
3821   int num_players = 0;
3822   int i;
3823
3824   for (i = 0; i < MAX_PLAYERS; i++)
3825     if (stored_player[i].connected_network)
3826       num_players++;
3827
3828   struct TextPosInfo *pos = &menu.main.network_players;
3829   int tile_size = pos->tile_size;
3830   int border_size = pos->border_size;
3831   int xoffset_text = tile_size + border_size;
3832   int font_nr = pos->font;
3833   int font_width = getFontWidth(font_nr);
3834   int font_height = getFontHeight(font_nr);
3835   int player_height = MAX(tile_size, font_height);
3836   int player_yoffset = player_height + border_size;
3837   int max_players_width = xoffset_text + MAX_PLAYER_NAME_LEN * font_width;
3838   int max_players_height = MAX_PLAYERS * player_yoffset - border_size;
3839   int all_players_height = num_players * player_yoffset - border_size;
3840   int max_xpos = SX + ALIGNED_XPOS(pos->x, max_players_width,  pos->align);
3841   int max_ypos = SY + ALIGNED_YPOS(pos->y, max_players_height, pos->valign);
3842   int ypos = SY + ALIGNED_YPOS(pos->y, all_players_height, pos->valign);
3843
3844   ClearRectangleOnBackground(drawto, max_xpos, max_ypos,
3845                              max_players_width, max_players_height);
3846
3847   // first draw local network player ...
3848   for (i = 0; i < MAX_PLAYERS; i++)
3849   {
3850     if (stored_player[i].connected_network &&
3851         stored_player[i].connected_locally)
3852     {
3853       char *player_name = getNetworkPlayerName(i + 1);
3854       int player_width = xoffset_text + getTextWidth(player_name, font_nr);
3855       int xpos = SX + ALIGNED_XPOS(pos->x, player_width,  pos->align);
3856
3857       DrawNetworkPlayer(xpos, ypos, i, tile_size, border_size, font_nr);
3858
3859       ypos += player_yoffset;
3860     }
3861   }
3862
3863   // ... then draw all other network players
3864   for (i = 0; i < MAX_PLAYERS; i++)
3865   {
3866     if (stored_player[i].connected_network &&
3867         !stored_player[i].connected_locally)
3868     {
3869       char *player_name = getNetworkPlayerName(i + 1);
3870       int player_width = xoffset_text + getTextWidth(player_name, font_nr);
3871       int xpos = SX + ALIGNED_XPOS(pos->x, player_width,  pos->align);
3872
3873       DrawNetworkPlayer(xpos, ypos, i, tile_size, border_size, font_nr);
3874
3875       ypos += player_yoffset;
3876     }
3877   }
3878 }
3879
3880 void DrawNetworkPlayers(void)
3881 {
3882   DrawNetworkPlayersExt(FALSE);
3883 }
3884
3885 void ClearNetworkPlayers(void)
3886 {
3887   DrawNetworkPlayersExt(TRUE);
3888 }
3889
3890 static void DrawGraphicAnimationExt(DrawBuffer *dst_bitmap, int x, int y,
3891                                     int graphic, int lx, int ly,
3892                                     int mask_mode)
3893 {
3894   int frame = getGraphicAnimationFrameXY(graphic, lx, ly);
3895
3896   if (mask_mode == USE_MASKING)
3897     DrawGraphicThruMaskExt(dst_bitmap, x, y, graphic, frame);
3898   else
3899     DrawGraphicExt(dst_bitmap, x, y, graphic, frame);
3900 }
3901
3902 void DrawFixedGraphicAnimationExt(DrawBuffer *dst_bitmap, int x, int y,
3903                                   int graphic, int sync_frame, int mask_mode)
3904 {
3905   int frame = getGraphicAnimationFrame(graphic, sync_frame);
3906
3907   if (mask_mode == USE_MASKING)
3908     DrawFixedGraphicThruMaskExt(dst_bitmap, x, y, graphic, frame);
3909   else
3910     DrawFixedGraphicExt(dst_bitmap, x, y, graphic, frame);
3911 }
3912
3913 void DrawSizedGraphicAnimationExt(DrawBuffer *dst_bitmap, int x, int y,
3914                                   int graphic, int sync_frame, int tilesize,
3915                                   int mask_mode)
3916 {
3917   int frame = getGraphicAnimationFrame(graphic, sync_frame);
3918
3919   if (mask_mode == USE_MASKING)
3920     DrawSizedGraphicThruMaskExt(dst_bitmap, x, y, graphic, frame, tilesize);
3921   else
3922     DrawSizedGraphicExt(dst_bitmap, x, y, graphic, frame, tilesize);
3923 }
3924
3925 static void DrawGraphicAnimation(int x, int y, int graphic)
3926 {
3927   int lx = LEVELX(x), ly = LEVELY(y);
3928   int mask_mode = NO_MASKING;
3929
3930   if (!IN_SCR_FIELD(x, y))
3931     return;
3932
3933   if (game.use_masked_elements)
3934   {
3935     if (Tile[lx][ly] != EL_EMPTY)
3936     {
3937       DrawScreenElementExt(x, y, 0, 0, EL_EMPTY, NO_CUTTING, NO_MASKING);
3938
3939       mask_mode = USE_MASKING;
3940     }
3941   }
3942
3943   DrawGraphicAnimationExt(drawto_field, FX + x * TILEX_VAR, FY + y * TILEY_VAR,
3944                           graphic, lx, ly, mask_mode);
3945
3946   MarkTileDirty(x, y);
3947 }
3948
3949 void DrawFixedGraphicAnimation(int x, int y, int graphic)
3950 {
3951   int lx = LEVELX(x), ly = LEVELY(y);
3952   int mask_mode = NO_MASKING;
3953
3954   if (!IN_SCR_FIELD(x, y))
3955     return;
3956
3957   if (game.use_masked_elements)
3958   {
3959     if (Tile[lx][ly] != EL_EMPTY)
3960     {
3961       DrawScreenElementExt(x, y, 0, 0, EL_EMPTY, NO_CUTTING, NO_MASKING);
3962
3963       mask_mode = USE_MASKING;
3964     }
3965   }
3966
3967   DrawGraphicAnimationExt(drawto_field, FX + x * TILEX, FY + y * TILEY,
3968                           graphic, lx, ly, mask_mode);
3969
3970   MarkTileDirty(x, y);
3971 }
3972
3973 void DrawLevelGraphicAnimation(int x, int y, int graphic)
3974 {
3975   DrawGraphicAnimation(SCREENX(x), SCREENY(y), graphic);
3976 }
3977
3978 void DrawLevelElementAnimation(int x, int y, int element)
3979 {
3980   int graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
3981
3982   DrawGraphicAnimation(SCREENX(x), SCREENY(y), graphic);
3983 }
3984
3985 void DrawLevelGraphicAnimationIfNeeded(int x, int y, int graphic)
3986 {
3987   int sx = SCREENX(x), sy = SCREENY(y);
3988
3989   if (!IN_LEV_FIELD(x, y) || !IN_SCR_FIELD(sx, sy))
3990     return;
3991
3992   if (Tile[x][y] == EL_EMPTY)
3993     graphic = el2img(GfxElementEmpty[x][y]);
3994
3995   if (!IS_NEW_FRAME(GfxFrame[x][y], graphic))
3996     return;
3997
3998   if (ANIM_MODE(graphic) & (ANIM_TILED | ANIM_RANDOM_STATIC))
3999     return;
4000
4001   DrawGraphicAnimation(sx, sy, graphic);
4002
4003 #if 1
4004   if (GFX_CRUMBLED(TILE_GFX_ELEMENT(x, y)))
4005     DrawLevelFieldCrumbled(x, y);
4006 #else
4007   if (GFX_CRUMBLED(Tile[x][y]))
4008     DrawLevelFieldCrumbled(x, y);
4009 #endif
4010 }
4011
4012 void DrawLevelElementAnimationIfNeeded(int x, int y, int element)
4013 {
4014   int sx = SCREENX(x), sy = SCREENY(y);
4015   int graphic;
4016
4017   if (!IN_LEV_FIELD(x, y) || !IN_SCR_FIELD(sx, sy))
4018     return;
4019
4020   graphic = el_act_dir2img(element, GfxAction[x][y], GfxDir[x][y]);
4021
4022   if (!IS_NEW_FRAME(GfxFrame[x][y], graphic))
4023     return;
4024
4025   DrawGraphicAnimation(sx, sy, graphic);
4026
4027   if (GFX_CRUMBLED(element))
4028     DrawLevelFieldCrumbled(x, y);
4029 }
4030
4031 static int getPlayerGraphic(struct PlayerInfo *player, int move_dir)
4032 {
4033   if (player->use_murphy)
4034   {
4035     // this works only because currently only one player can be "murphy" ...
4036     static int last_horizontal_dir = MV_LEFT;
4037     int graphic = el_act_dir2img(EL_SP_MURPHY, player->GfxAction, move_dir);
4038
4039     if (move_dir == MV_LEFT || move_dir == MV_RIGHT)
4040       last_horizontal_dir = move_dir;
4041
4042     if (graphic == IMG_SP_MURPHY)       // undefined => use special graphic
4043     {
4044       int direction = (player->is_snapping ? move_dir : last_horizontal_dir);
4045
4046       graphic = el_act_dir2img(EL_SP_MURPHY, player->GfxAction, direction);
4047     }
4048
4049     return graphic;
4050   }
4051   else
4052     return el_act_dir2img(player->artwork_element, player->GfxAction, move_dir);
4053 }
4054
4055 static boolean equalGraphics(int graphic1, int graphic2)
4056 {
4057   struct GraphicInfo *g1 = &graphic_info[graphic1];
4058   struct GraphicInfo *g2 = &graphic_info[graphic2];
4059
4060   return (g1->bitmap      == g2->bitmap &&
4061           g1->src_x       == g2->src_x &&
4062           g1->src_y       == g2->src_y &&
4063           g1->anim_frames == g2->anim_frames &&
4064           g1->anim_delay  == g2->anim_delay &&
4065           g1->anim_mode   == g2->anim_mode);
4066 }
4067
4068 #define DRAW_PLAYER_OVER_PUSHED_ELEMENT 1
4069
4070 enum
4071 {
4072   DRAW_PLAYER_STAGE_INIT = 0,
4073   DRAW_PLAYER_STAGE_LAST_FIELD,
4074   DRAW_PLAYER_STAGE_FIELD_UNDER_PLAYER,
4075 #if DRAW_PLAYER_OVER_PUSHED_ELEMENT
4076   DRAW_PLAYER_STAGE_ELEMENT_PUSHED,
4077   DRAW_PLAYER_STAGE_PLAYER,
4078 #else
4079   DRAW_PLAYER_STAGE_PLAYER,
4080   DRAW_PLAYER_STAGE_ELEMENT_PUSHED,
4081 #endif
4082   DRAW_PLAYER_STAGE_ELEMENT_OVER_PLAYER,
4083   DRAW_PLAYER_STAGE_FIELD_OVER_PLAYER,
4084
4085   NUM_DRAW_PLAYER_STAGES
4086 };
4087
4088 static void DrawPlayerExt(struct PlayerInfo *player, int drawing_stage)
4089 {
4090   static int static_last_player_graphic[MAX_PLAYERS];
4091   static int static_last_player_frame[MAX_PLAYERS];
4092   static boolean static_player_is_opaque[MAX_PLAYERS];
4093   static boolean draw_player[MAX_PLAYERS];
4094   int pnr = player->index_nr;
4095
4096   if (drawing_stage == DRAW_PLAYER_STAGE_INIT)
4097   {
4098     static_last_player_graphic[pnr] = getPlayerGraphic(player, player->MovDir);
4099     static_last_player_frame[pnr] = player->Frame;
4100     static_player_is_opaque[pnr] = FALSE;
4101
4102     draw_player[pnr] = TRUE;
4103   }
4104
4105   if (!draw_player[pnr])
4106     return;
4107
4108 #if DEBUG
4109   if (!IN_LEV_FIELD(player->jx, player->jy))
4110   {
4111     Debug("draw:DrawPlayerExt", "x = %d, y = %d", player->jx, player->jy);
4112     Debug("draw:DrawPlayerExt", "This should never happen!");
4113
4114     draw_player[pnr] = FALSE;
4115
4116     return;
4117   }
4118 #endif
4119
4120   int last_player_graphic  = static_last_player_graphic[pnr];
4121   int last_player_frame    = static_last_player_frame[pnr];
4122   boolean player_is_opaque = static_player_is_opaque[pnr];
4123
4124   int jx = player->jx;
4125   int jy = player->jy;
4126   int move_dir = (player->is_waiting ? player->dir_waiting : player->MovDir);
4127   int dx = (move_dir == MV_LEFT ? -1 : move_dir == MV_RIGHT ? +1 : 0);
4128   int dy = (move_dir == MV_UP   ? -1 : move_dir == MV_DOWN  ? +1 : 0);
4129   int last_jx = (player->is_moving ? jx - dx : jx);
4130   int last_jy = (player->is_moving ? jy - dy : jy);
4131   int next_jx = jx + dx;
4132   int next_jy = jy + dy;
4133   boolean player_is_moving = (player->MovPos != 0 ? TRUE : FALSE);
4134   int sx = SCREENX(jx);
4135   int sy = SCREENY(jy);
4136   int sxx = (move_dir == MV_LEFT || move_dir == MV_RIGHT ? player->GfxPos : 0);
4137   int syy = (move_dir == MV_UP   || move_dir == MV_DOWN  ? player->GfxPos : 0);
4138   int element = Tile[jx][jy];
4139   int last_element = Tile[last_jx][last_jy];
4140   int action = (player->is_pushing    ? ACTION_PUSHING         :
4141                 player->is_digging    ? ACTION_DIGGING         :
4142                 player->is_collecting ? ACTION_COLLECTING      :
4143                 player->is_moving     ? ACTION_MOVING          :
4144                 player->is_snapping   ? ACTION_SNAPPING        :
4145                 player->is_dropping   ? ACTION_DROPPING        :
4146                 player->is_waiting    ? player->action_waiting :
4147                 ACTION_DEFAULT);
4148
4149   if (drawing_stage == DRAW_PLAYER_STAGE_INIT)
4150   {
4151     // ------------------------------------------------------------------------
4152     // initialize drawing the player
4153     // ------------------------------------------------------------------------
4154
4155     draw_player[pnr] = FALSE;
4156
4157     // GfxElement[][] is set to the element the player is digging or collecting;
4158     // remove also for off-screen player if the player is not moving anymore
4159     if (IN_LEV_FIELD(jx, jy) && !player_is_moving)
4160       GfxElement[jx][jy] = EL_UNDEFINED;
4161
4162     if (!player->active || !IN_SCR_FIELD(SCREENX(last_jx), SCREENY(last_jy)))
4163       return;
4164
4165     if (element == EL_EXPLOSION)
4166       return;
4167
4168     InitPlayerGfxAnimation(player, action, move_dir);
4169
4170     draw_player[pnr] = TRUE;
4171   }
4172   else if (drawing_stage == DRAW_PLAYER_STAGE_LAST_FIELD)
4173   {
4174     // ------------------------------------------------------------------------
4175     // draw things in the field the player is leaving, if needed
4176     // ------------------------------------------------------------------------
4177
4178     if (!IN_SCR_FIELD(sx, sy))
4179       draw_player[pnr] = FALSE;
4180
4181     if (!player->is_moving)
4182       return;
4183
4184     if (Back[last_jx][last_jy] && IS_DRAWABLE(last_element))
4185     {
4186       DrawLevelElement(last_jx, last_jy, Back[last_jx][last_jy]);
4187
4188       if (last_element == EL_DYNAMITE_ACTIVE ||
4189           last_element == EL_EM_DYNAMITE_ACTIVE ||
4190           last_element == EL_SP_DISK_RED_ACTIVE)
4191         DrawDynamite(last_jx, last_jy);
4192       else
4193         DrawLevelFieldThruMask(last_jx, last_jy);
4194     }
4195     else if (last_element == EL_DYNAMITE_ACTIVE ||
4196              last_element == EL_EM_DYNAMITE_ACTIVE ||
4197              last_element == EL_SP_DISK_RED_ACTIVE)
4198       DrawDynamite(last_jx, last_jy);
4199     else
4200       DrawLevelField(last_jx, last_jy);
4201   }
4202   else if (drawing_stage == DRAW_PLAYER_STAGE_FIELD_UNDER_PLAYER)
4203   {
4204     // ------------------------------------------------------------------------
4205     // draw things behind the player, if needed
4206     // ------------------------------------------------------------------------
4207
4208     if (Back[jx][jy])
4209     {
4210       DrawLevelElement(jx, jy, Back[jx][jy]);
4211
4212       return;
4213     }
4214
4215     if (IS_ACTIVE_BOMB(element))
4216     {
4217       DrawLevelElement(jx, jy, EL_EMPTY);
4218
4219       return;
4220     }
4221
4222     if (player_is_moving && GfxElement[jx][jy] != EL_UNDEFINED)
4223     {
4224       int old_element = GfxElement[jx][jy];
4225       int old_graphic = el_act_dir2img(old_element, action, move_dir);
4226       int frame = getGraphicAnimationFrame(old_graphic, player->StepFrame);
4227
4228       if (GFX_CRUMBLED(old_element))
4229         DrawLevelFieldCrumbledDigging(jx, jy, move_dir, player->StepFrame);
4230       else
4231         DrawScreenGraphic(sx, sy, old_graphic, frame);
4232
4233       if (graphic_info[old_graphic].anim_mode & ANIM_OPAQUE_PLAYER)
4234         static_player_is_opaque[pnr] = TRUE;
4235     }
4236     else
4237     {
4238       GfxElement[jx][jy] = EL_UNDEFINED;
4239
4240       // make sure that pushed elements are drawn with correct frame rate
4241       int graphic = el_act_dir2img(element, ACTION_PUSHING, move_dir);
4242
4243       if (player->is_pushing && player->is_moving && !IS_ANIM_MODE_CE(graphic))
4244         GfxFrame[jx][jy] = player->StepFrame;
4245
4246       DrawLevelField(jx, jy);
4247     }
4248   }
4249   else if (drawing_stage == DRAW_PLAYER_STAGE_ELEMENT_PUSHED)
4250   {
4251     // ------------------------------------------------------------------------
4252     // draw things the player is pushing, if needed
4253     // ------------------------------------------------------------------------
4254
4255     if (!player->is_pushing || !player->is_moving)
4256       return;
4257
4258     if (Tile[next_jx][next_jy] == EL_EXPLOSION)
4259       return;
4260
4261     int gfx_frame = GfxFrame[jx][jy];
4262
4263     if (!IS_MOVING(jx, jy))             // push movement already finished
4264     {
4265       element = Tile[next_jx][next_jy];
4266       gfx_frame = GfxFrame[next_jx][next_jy];
4267     }
4268
4269     int graphic = el_act_dir2img(element, ACTION_PUSHING, move_dir);
4270     int sync_frame = (IS_ANIM_MODE_CE(graphic) ? gfx_frame : player->StepFrame);
4271     int frame = getGraphicAnimationFrame(graphic, sync_frame);
4272
4273     // draw background element under pushed element (like the Sokoban field)
4274     if (game.use_masked_pushing && IS_MOVING(jx, jy))
4275     {
4276       // this allows transparent pushing animation over non-black background
4277
4278       if (Back[jx][jy])
4279         DrawLevelElement(jx, jy, Back[jx][jy]);
4280       else
4281         DrawLevelElement(jx, jy, EL_EMPTY);
4282     }
4283
4284     if (Back[next_jx][next_jy])
4285       DrawLevelElement(next_jx, next_jy, Back[next_jx][next_jy]);
4286     else
4287       DrawLevelElement(next_jx, next_jy, EL_EMPTY);
4288
4289     int px = SCREENX(jx), py = SCREENY(jy);
4290     int pxx = (TILEX - ABS(sxx)) * dx;
4291     int pyy = (TILEY - ABS(syy)) * dy;
4292
4293 #if 1
4294     // do not draw (EM style) pushing animation when pushing is finished
4295     // (two-tile animations usually do not contain start and end frame)
4296     if (graphic_info[graphic].double_movement && !IS_MOVING(jx, jy))
4297       DrawLevelElement(next_jx, next_jy, Tile[next_jx][next_jy]);
4298     else
4299       DrawGraphicShiftedThruMask(px, py, pxx, pyy, graphic, frame, NO_CUTTING);
4300 #else
4301     // masked drawing is needed for EMC style (double) movement graphics
4302     // !!! (ONLY WHEN DRAWING PUSHED ELEMENT OVER THE PLAYER) !!!
4303     DrawGraphicShiftedThruMask(px, py, pxx, pyy, graphic, frame, NO_CUTTING);
4304 #endif
4305   }
4306   else if (drawing_stage == DRAW_PLAYER_STAGE_PLAYER)
4307   {
4308     // ------------------------------------------------------------------------
4309     // draw player himself
4310     // ------------------------------------------------------------------------
4311
4312     int graphic = getPlayerGraphic(player, move_dir);
4313
4314     // in the case of changed player action or direction, prevent the current
4315     // animation frame from being restarted for identical animations
4316     if (player->Frame == 0 && equalGraphics(graphic, last_player_graphic))
4317       player->Frame = last_player_frame;
4318
4319     int frame = getGraphicAnimationFrame(graphic, player->Frame);
4320
4321     if (player_is_opaque)
4322       DrawGraphicShifted(sx,sy, sxx,syy, graphic, frame, NO_CUTTING,NO_MASKING);
4323     else
4324       DrawGraphicShiftedThruMask(sx, sy, sxx, syy, graphic, frame, NO_CUTTING);
4325
4326     if (SHIELD_ON(player))
4327     {
4328       graphic = (player->shield_deadly_time_left ? IMG_SHIELD_DEADLY_ACTIVE :
4329                  IMG_SHIELD_NORMAL_ACTIVE);
4330       frame = getGraphicAnimationFrame(graphic, -1);
4331
4332       DrawGraphicShiftedThruMask(sx, sy, sxx, syy, graphic, frame, NO_CUTTING);
4333     }
4334   }
4335   else if (drawing_stage == DRAW_PLAYER_STAGE_ELEMENT_OVER_PLAYER)
4336   {
4337     // ------------------------------------------------------------------------
4338     // draw things in front of player (active dynamite or dynabombs)
4339     // ------------------------------------------------------------------------
4340
4341     if (IS_ACTIVE_BOMB(element))
4342     {
4343       int graphic = el2img(element);
4344       int frame = getGraphicAnimationFrameXY(graphic, jx, jy);
4345
4346       if (game.emulation == EMU_SUPAPLEX)
4347         DrawGraphic(sx, sy, IMG_SP_DISK_RED, frame);
4348       else
4349         DrawGraphicThruMask(sx, sy, graphic, frame);
4350     }
4351
4352     if (player_is_moving && last_element == EL_EXPLOSION)
4353     {
4354       int element = (GfxElement[last_jx][last_jy] != EL_UNDEFINED ?
4355                      GfxElement[last_jx][last_jy] :  EL_EMPTY);
4356       int graphic = el_act2img(element, ACTION_EXPLODING);
4357       int delay = (game.emulation == EMU_SUPAPLEX ? 3 : 2);
4358       int phase = ExplodePhase[last_jx][last_jy] - 1;
4359       int frame = getGraphicAnimationFrame(graphic, phase - delay);
4360
4361       if (phase >= delay)
4362         DrawGraphicThruMask(SCREENX(last_jx), SCREENY(last_jy), graphic, frame);
4363     }
4364   }
4365   else if (drawing_stage == DRAW_PLAYER_STAGE_FIELD_OVER_PLAYER)
4366   {
4367     // ------------------------------------------------------------------------
4368     // draw elements the player is just walking/passing through/under
4369     // ------------------------------------------------------------------------
4370
4371     if (player_is_moving)
4372     {
4373       // handle the field the player is leaving ...
4374       if (IS_ACCESSIBLE_INSIDE(last_element))
4375         DrawLevelField(last_jx, last_jy);
4376       else if (IS_ACCESSIBLE_UNDER(last_element))
4377         DrawLevelFieldThruMask(last_jx, last_jy);
4378     }
4379
4380     // do not redraw accessible elements if the player is just pushing them
4381     if (!player_is_moving || !player->is_pushing)
4382     {
4383       // ... and the field the player is entering
4384       if (IS_ACCESSIBLE_INSIDE(element))
4385         DrawLevelField(jx, jy);
4386       else if (IS_ACCESSIBLE_UNDER(element))
4387         DrawLevelFieldThruMask(jx, jy);
4388     }
4389
4390     MarkTileDirty(sx, sy);
4391   }
4392 }
4393
4394 void DrawPlayer(struct PlayerInfo *player)
4395 {
4396   int i;
4397
4398   for (i = 0; i < NUM_DRAW_PLAYER_STAGES; i++)
4399     DrawPlayerExt(player, i);
4400 }
4401
4402 void DrawAllPlayers(void)
4403 {
4404   int i, j;
4405
4406   for (i = 0; i < NUM_DRAW_PLAYER_STAGES; i++)
4407     for (j = 0; j < MAX_PLAYERS; j++)
4408       if (stored_player[j].active)
4409         DrawPlayerExt(&stored_player[j], i);
4410 }
4411
4412 void DrawPlayerField(int x, int y)
4413 {
4414   if (!IS_PLAYER(x, y))
4415     return;
4416
4417   DrawPlayer(PLAYERINFO(x, y));
4418 }
4419
4420 // ----------------------------------------------------------------------------
4421
4422 void WaitForEventToContinue(void)
4423 {
4424   boolean first_wait = TRUE;
4425   boolean still_wait = TRUE;
4426
4427   if (program.headless)
4428     return;
4429
4430   // simulate releasing mouse button over last gadget, if still pressed
4431   if (button_status)
4432     HandleGadgets(-1, -1, 0);
4433
4434   button_status = MB_RELEASED;
4435
4436   ClearEventQueue();
4437   ClearPlayerAction();
4438
4439   while (still_wait)
4440   {
4441     Event event;
4442
4443     if (NextValidEvent(&event))
4444     {
4445       switch (event.type)
4446       {
4447         case EVENT_BUTTONPRESS:
4448         case EVENT_FINGERPRESS:
4449           first_wait = FALSE;
4450           break;
4451
4452         case EVENT_BUTTONRELEASE:
4453         case EVENT_FINGERRELEASE:
4454           still_wait = first_wait;
4455           break;
4456
4457         case EVENT_KEYPRESS:
4458         case SDL_CONTROLLERBUTTONDOWN:
4459         case SDL_JOYBUTTONDOWN:
4460           still_wait = FALSE;
4461           break;
4462
4463         default:
4464           HandleOtherEvents(&event);
4465           break;
4466       }
4467     }
4468     else if (AnyJoystickButton() == JOY_BUTTON_NEW_PRESSED)
4469     {
4470       still_wait = FALSE;
4471     }
4472
4473     if (!PendingEvent())
4474       BackToFront();
4475   }
4476 }
4477
4478 #define MAX_REQUEST_LINES               13
4479 #define MAX_REQUEST_LINE_FONT1_LEN      7
4480 #define MAX_REQUEST_LINE_FONT2_LEN      10
4481
4482 static int RequestHandleEvents(unsigned int req_state, int draw_buffer_game)
4483 {
4484   boolean game_ended = (game_status == GAME_MODE_PLAYING && checkGameEnded());
4485   int draw_buffer_last = GetDrawtoField();
4486   int width  = request.width;
4487   int height = request.height;
4488   int sx, sy;
4489   int result;
4490
4491   setRequestPosition(&sx, &sy, FALSE);
4492
4493   button_status = MB_RELEASED;
4494
4495   request_gadget_id = -1;
4496   result = -1;
4497
4498   while (result < 0)
4499   {
4500     if (game_ended)
4501     {
4502       SetDrawtoField(draw_buffer_game);
4503
4504       HandleGameActions();
4505
4506       SetDrawtoField(DRAW_TO_BACKBUFFER);
4507     }
4508
4509     if (PendingEvent())
4510     {
4511       Event event;
4512
4513       while (NextValidEvent(&event))
4514       {
4515         switch (event.type)
4516         {
4517           case EVENT_BUTTONPRESS:
4518           case EVENT_BUTTONRELEASE:
4519           case EVENT_MOTIONNOTIFY:
4520           {
4521             DrawBuffer *drawto_last = drawto;
4522             int mx, my;
4523
4524             if (event.type == EVENT_MOTIONNOTIFY)
4525             {
4526               if (!button_status)
4527                 continue;
4528
4529               motion_status = TRUE;
4530               mx = ((MotionEvent *) &event)->x;
4531               my = ((MotionEvent *) &event)->y;
4532             }
4533             else
4534             {
4535               motion_status = FALSE;
4536               mx = ((ButtonEvent *) &event)->x;
4537               my = ((ButtonEvent *) &event)->y;
4538               if (event.type == EVENT_BUTTONPRESS)
4539                 button_status = ((ButtonEvent *) &event)->button;
4540               else
4541                 button_status = MB_RELEASED;
4542             }
4543
4544             if (global.use_envelope_request)
4545             {
4546               // draw changed button states to temporary bitmap
4547               drawto = bitmap_db_store_1;
4548             }
4549
4550             // this sets 'request_gadget_id'
4551             HandleGadgets(mx, my, button_status);
4552
4553             if (global.use_envelope_request)
4554             {
4555               // restore pointer to drawing buffer
4556               drawto = drawto_last;
4557
4558               // prepare complete envelope request from temporary bitmap
4559               PrepareEnvelopeRequestToScreen(bitmap_db_store_1, sx, sy,
4560                                              width, height);
4561             }
4562
4563             switch (request_gadget_id)
4564             {
4565               case TOOL_CTRL_ID_YES:
4566               case TOOL_CTRL_ID_TOUCH_YES:
4567                 result = TRUE;
4568                 break;
4569               case TOOL_CTRL_ID_NO:
4570               case TOOL_CTRL_ID_TOUCH_NO:
4571                 result = FALSE;
4572                 break;
4573               case TOOL_CTRL_ID_CONFIRM:
4574               case TOOL_CTRL_ID_TOUCH_CONFIRM:
4575                 result = TRUE | FALSE;
4576                 break;
4577
4578               case TOOL_CTRL_ID_PLAYER_1:
4579                 result = 1;
4580                 break;
4581               case TOOL_CTRL_ID_PLAYER_2:
4582                 result = 2;
4583                 break;
4584               case TOOL_CTRL_ID_PLAYER_3:
4585                 result = 3;
4586                 break;
4587               case TOOL_CTRL_ID_PLAYER_4:
4588                 result = 4;
4589                 break;
4590
4591               default:
4592                 // only check clickable animations if no request gadget clicked
4593                 HandleGlobalAnimClicks(mx, my, button_status, FALSE);
4594                 break;
4595             }
4596
4597             break;
4598           }
4599
4600           case SDL_WINDOWEVENT:
4601             HandleWindowEvent((WindowEvent *) &event);
4602             break;
4603
4604           case SDL_APP_WILLENTERBACKGROUND:
4605           case SDL_APP_DIDENTERBACKGROUND:
4606           case SDL_APP_WILLENTERFOREGROUND:
4607           case SDL_APP_DIDENTERFOREGROUND:
4608             HandlePauseResumeEvent((PauseResumeEvent *) &event);
4609             break;
4610
4611           case EVENT_KEYPRESS:
4612           {
4613             Key key = GetEventKey((KeyEvent *)&event);
4614
4615             switch (key)
4616             {
4617               case KSYM_space:
4618                 if (req_state & REQ_CONFIRM)
4619                   result = 1;
4620                 break;
4621
4622               case KSYM_Return:
4623               case KSYM_y:
4624               case KSYM_Y:
4625               case KSYM_Select:
4626               case KSYM_Menu:
4627 #if defined(KSYM_Rewind)
4628               case KSYM_Rewind:         // for Amazon Fire TV remote
4629 #endif
4630                 result = 1;
4631                 break;
4632
4633               case KSYM_Escape:
4634               case KSYM_n:
4635               case KSYM_N:
4636               case KSYM_Back:
4637 #if defined(KSYM_FastForward)
4638               case KSYM_FastForward:    // for Amazon Fire TV remote
4639 #endif
4640                 result = 0;
4641                 break;
4642
4643               default:
4644                 HandleKeysDebug(key, KEY_PRESSED);
4645                 break;
4646             }
4647
4648             if (req_state & REQ_PLAYER)
4649             {
4650               int old_player_nr = setup.network_player_nr;
4651
4652               if (result != -1)
4653                 result = old_player_nr + 1;
4654
4655               switch (key)
4656               {
4657                 case KSYM_space:
4658                   result = old_player_nr + 1;
4659                   break;
4660
4661                 case KSYM_Up:
4662                 case KSYM_1:
4663                   result = 1;
4664                   break;
4665
4666                 case KSYM_Right:
4667                 case KSYM_2:
4668                   result = 2;
4669                   break;
4670
4671                 case KSYM_Down:
4672                 case KSYM_3:
4673                   result = 3;
4674                   break;
4675
4676                 case KSYM_Left:
4677                 case KSYM_4:
4678                   result = 4;
4679                   break;
4680
4681                 default:
4682                   break;
4683               }
4684             }
4685
4686             break;
4687           }
4688
4689           case EVENT_FINGERRELEASE:
4690           case EVENT_KEYRELEASE:
4691             ClearPlayerAction();
4692             break;
4693
4694           case SDL_CONTROLLERBUTTONDOWN:
4695             switch (event.cbutton.button)
4696             {
4697               case SDL_CONTROLLER_BUTTON_A:
4698               case SDL_CONTROLLER_BUTTON_X:
4699               case SDL_CONTROLLER_BUTTON_LEFTSHOULDER:
4700               case SDL_CONTROLLER_BUTTON_LEFTSTICK:
4701                 result = 1;
4702                 break;
4703
4704               case SDL_CONTROLLER_BUTTON_B:
4705               case SDL_CONTROLLER_BUTTON_Y:
4706               case SDL_CONTROLLER_BUTTON_RIGHTSHOULDER:
4707               case SDL_CONTROLLER_BUTTON_RIGHTSTICK:
4708               case SDL_CONTROLLER_BUTTON_BACK:
4709                 result = 0;
4710                 break;
4711             }
4712
4713             if (req_state & REQ_PLAYER)
4714             {
4715               int old_player_nr = setup.network_player_nr;
4716
4717               if (result != -1)
4718                 result = old_player_nr + 1;
4719
4720               switch (event.cbutton.button)
4721               {
4722                 case SDL_CONTROLLER_BUTTON_DPAD_UP:
4723                 case SDL_CONTROLLER_BUTTON_Y:
4724                   result = 1;
4725                   break;
4726
4727                 case SDL_CONTROLLER_BUTTON_DPAD_RIGHT:
4728                 case SDL_CONTROLLER_BUTTON_B:
4729                   result = 2;
4730                   break;
4731
4732                 case SDL_CONTROLLER_BUTTON_DPAD_DOWN:
4733                 case SDL_CONTROLLER_BUTTON_A:
4734                   result = 3;
4735                   break;
4736
4737                 case SDL_CONTROLLER_BUTTON_DPAD_LEFT:
4738                 case SDL_CONTROLLER_BUTTON_X:
4739                   result = 4;
4740                   break;
4741
4742                 default:
4743                   break;
4744               }
4745             }
4746
4747             break;
4748
4749           case SDL_CONTROLLERBUTTONUP:
4750             HandleJoystickEvent(&event);
4751             ClearPlayerAction();
4752             break;
4753
4754           default:
4755             HandleOtherEvents(&event);
4756             break;
4757         }
4758       }
4759     }
4760     else if (AnyJoystickButton() == JOY_BUTTON_NEW_PRESSED)
4761     {
4762       int joy = AnyJoystick();
4763
4764       if (joy & JOY_BUTTON_1)
4765         result = 1;
4766       else if (joy & JOY_BUTTON_2)
4767         result = 0;
4768     }
4769     else if (AnyJoystick())
4770     {
4771       int joy = AnyJoystick();
4772
4773       if (req_state & REQ_PLAYER)
4774       {
4775         if (joy & JOY_UP)
4776           result = 1;
4777         else if (joy & JOY_RIGHT)
4778           result = 2;
4779         else if (joy & JOY_DOWN)
4780           result = 3;
4781         else if (joy & JOY_LEFT)
4782           result = 4;
4783       }
4784     }
4785
4786     BackToFront();
4787   }
4788
4789   SetDrawtoField(draw_buffer_last);
4790
4791   return result;
4792 }
4793
4794 static void DoRequestBefore(void)
4795 {
4796   if (game_status == GAME_MODE_PLAYING)
4797     BlitScreenToBitmap(backbuffer);
4798
4799   // disable deactivated drawing when quick-loading level tape recording
4800   if (tape.playing && tape.deactivate_display)
4801     TapeDeactivateDisplayOff(TRUE);
4802
4803   SetMouseCursor(CURSOR_DEFAULT);
4804
4805   // pause network game while waiting for request to answer
4806   if (network.enabled &&
4807       game_status == GAME_MODE_PLAYING &&
4808       !game.all_players_gone)
4809     SendToServer_PausePlaying();
4810
4811   // simulate releasing mouse button over last gadget, if still pressed
4812   if (button_status)
4813     HandleGadgets(-1, -1, 0);
4814
4815   UnmapAllGadgets();
4816 }
4817
4818 static void DoRequestAfter(void)
4819 {
4820   RemapAllGadgets();
4821
4822   if (game_status == GAME_MODE_PLAYING)
4823   {
4824     SetPanelBackground();
4825     SetDrawBackgroundMask(REDRAW_DOOR_1);
4826   }
4827   else
4828   {
4829     SetDrawBackgroundMask(REDRAW_FIELD);
4830   }
4831
4832   // continue network game after request
4833   if (network.enabled &&
4834       game_status == GAME_MODE_PLAYING &&
4835       !game.all_players_gone)
4836     SendToServer_ContinuePlaying();
4837
4838   // restore deactivated drawing when quick-loading level tape recording
4839   if (tape.playing && tape.deactivate_display)
4840     TapeDeactivateDisplayOn();
4841 }
4842
4843 static boolean RequestDoor(char *text, unsigned int req_state)
4844 {
4845   int draw_buffer_last = GetDrawtoField();
4846   unsigned int old_door_state = GetDoorState();
4847   int max_request_line_len = MAX_REQUEST_LINE_FONT1_LEN;
4848   int font_nr = FONT_TEXT_2;
4849   char *text_ptr;
4850   int result;
4851   int ty;
4852
4853   if (maxWordLengthInRequestString(text) > MAX_REQUEST_LINE_FONT1_LEN)
4854   {
4855     max_request_line_len = MAX_REQUEST_LINE_FONT2_LEN;
4856     font_nr = FONT_TEXT_1;
4857   }
4858
4859   DoRequestBefore();
4860
4861   // draw released gadget before proceeding
4862   // BackToFront();
4863
4864   if (old_door_state & DOOR_OPEN_1)
4865   {
4866     CloseDoor(DOOR_CLOSE_1);
4867
4868     // save old door content
4869     BlitBitmap(bitmap_db_door_1, bitmap_db_door_1,
4870                0 * DXSIZE, 0, DXSIZE, DYSIZE, 1 * DXSIZE, 0);
4871   }
4872
4873   SetDoorBackgroundImage(IMG_BACKGROUND_DOOR);
4874   SetDrawBackgroundMask(REDRAW_FIELD | REDRAW_DOOR_1);
4875
4876   // clear door drawing field
4877   DrawBackground(DX, DY, DXSIZE, DYSIZE);
4878
4879   // force DOOR font inside door area
4880   SetFontStatus(GAME_MODE_PSEUDO_DOOR);
4881
4882   // write text for request
4883   for (text_ptr = text, ty = 0; ty < MAX_REQUEST_LINES; ty++)
4884   {
4885     char text_line[max_request_line_len + 1];
4886     int tx, tl, tc = 0;
4887
4888     if (!*text_ptr)
4889       break;
4890
4891     for (tl = 0, tx = 0; tx < max_request_line_len; tl++, tx++)
4892     {
4893       tc = *(text_ptr + tx);
4894       // if (!tc || tc == ' ')
4895       if (!tc || tc == ' ' || tc == '?' || tc == '!')
4896         break;
4897     }
4898
4899     if ((tc == '?' || tc == '!') && tl == 0)
4900       tl = 1;
4901
4902     if (!tl)
4903     {
4904       text_ptr++;
4905       ty--;
4906       continue;
4907     }
4908
4909     strncpy(text_line, text_ptr, tl);
4910     text_line[tl] = 0;
4911
4912     DrawText(DX + (DXSIZE - tl * getFontWidth(font_nr)) / 2,
4913              DY + 8 + ty * (getFontHeight(font_nr) + 2),
4914              text_line, font_nr);
4915
4916     text_ptr += tl + (tc == ' ' ? 1 : 0);
4917     // text_ptr += tl + (tc == ' ' || tc == '?' || tc == '!' ? 1 : 0);
4918   }
4919
4920   ResetFontStatus();
4921
4922   MapToolButtons(req_state);
4923
4924   // copy request gadgets to door backbuffer
4925   BlitBitmap(drawto, bitmap_db_door_1, DX, DY, DXSIZE, DYSIZE, 0, 0);
4926
4927   OpenDoor(DOOR_OPEN_1);
4928
4929   // ---------- handle request buttons ----------
4930   result = RequestHandleEvents(req_state, draw_buffer_last);
4931
4932   UnmapToolButtons();
4933
4934   if (!(req_state & REQ_STAY_OPEN))
4935   {
4936     CloseDoor(DOOR_CLOSE_1);
4937
4938     if (((old_door_state & DOOR_OPEN_1) && !(req_state & REQ_STAY_CLOSED)) ||
4939         (req_state & REQ_REOPEN))
4940       OpenDoor(DOOR_OPEN_1 | DOOR_COPY_BACK);
4941   }
4942
4943   DoRequestAfter();
4944
4945   return result;
4946 }
4947
4948 static boolean RequestEnvelope(char *text, unsigned int req_state)
4949 {
4950   int draw_buffer_last = GetDrawtoField();
4951   int result;
4952
4953   DoRequestBefore();
4954
4955   DrawEnvelopeRequest(text, req_state);
4956   ShowEnvelopeRequest(text, req_state, ACTION_OPENING);
4957
4958   // ---------- handle request buttons ----------
4959   result = RequestHandleEvents(req_state, draw_buffer_last);
4960
4961   UnmapToolButtons();
4962
4963   ShowEnvelopeRequest(text, req_state, ACTION_CLOSING);
4964
4965   DoRequestAfter();
4966
4967   return result;
4968 }
4969
4970 boolean Request(char *text, unsigned int req_state)
4971 {
4972   boolean game_ended = (game_status == GAME_MODE_PLAYING && checkGameEnded());
4973   boolean overlay_enabled = GetOverlayEnabled();
4974   boolean result;
4975
4976   // when showing request dialog after game ended, deactivate game panel
4977   if (game_ended)
4978     game.panel.active = FALSE;
4979
4980   game.request_active = TRUE;
4981
4982   SetOverlayEnabled(FALSE);
4983
4984   if (global.use_envelope_request)
4985     result = RequestEnvelope(text, req_state);
4986   else
4987     result = RequestDoor(text, req_state);
4988
4989   SetOverlayEnabled(overlay_enabled);
4990
4991   game.request_active = FALSE;
4992
4993   return result;
4994 }
4995
4996 static int compareDoorPartOrderInfo(const void *object1, const void *object2)
4997 {
4998   const struct DoorPartOrderInfo *dpo1 = (struct DoorPartOrderInfo *)object1;
4999   const struct DoorPartOrderInfo *dpo2 = (struct DoorPartOrderInfo *)object2;
5000   int compare_result;
5001
5002   if (dpo1->sort_priority != dpo2->sort_priority)
5003     compare_result = dpo1->sort_priority - dpo2->sort_priority;
5004   else
5005     compare_result = dpo1->nr - dpo2->nr;
5006
5007   return compare_result;
5008 }
5009
5010 void InitGraphicCompatibilityInfo_Doors(void)
5011 {
5012   struct
5013   {
5014     int door_token;
5015     int part_1, part_8;
5016     struct DoorInfo *door;
5017   }
5018   doors[] =
5019   {
5020     { DOOR_1,   IMG_GFX_DOOR_1_PART_1,  IMG_GFX_DOOR_1_PART_8,  &door_1 },
5021     { DOOR_2,   IMG_GFX_DOOR_2_PART_1,  IMG_GFX_DOOR_2_PART_8,  &door_2 },
5022
5023     { -1,       -1,                     -1,                     NULL    }
5024   };
5025   struct Rect door_rect_list[] =
5026   {
5027     { DX, DY, DXSIZE, DYSIZE },
5028     { VX, VY, VXSIZE, VYSIZE }
5029   };
5030   int i, j;
5031
5032   for (i = 0; doors[i].door_token != -1; i++)
5033   {
5034     int door_token = doors[i].door_token;
5035     int door_index = DOOR_INDEX_FROM_TOKEN(door_token);
5036     int part_1 = doors[i].part_1;
5037     int part_8 = doors[i].part_8;
5038     int part_2 = part_1 + 1;
5039     int part_3 = part_1 + 2;
5040     struct DoorInfo *door = doors[i].door;
5041     struct Rect *door_rect = &door_rect_list[door_index];
5042     boolean door_gfx_redefined = FALSE;
5043
5044     // check if any door part graphic definitions have been redefined
5045
5046     for (j = 0; door_part_controls[j].door_token != -1; j++)
5047     {
5048       struct DoorPartControlInfo *dpc = &door_part_controls[j];
5049       struct FileInfo *fi = getImageListEntryFromImageID(dpc->graphic);
5050
5051       if (dpc->door_token == door_token && fi->redefined)
5052         door_gfx_redefined = TRUE;
5053     }
5054
5055     // check for old-style door graphic/animation modifications
5056
5057     if (!door_gfx_redefined)
5058     {
5059       if (door->anim_mode & ANIM_STATIC_PANEL)
5060       {
5061         door->panel.step_xoffset = 0;
5062         door->panel.step_yoffset = 0;
5063       }
5064
5065       if (door->anim_mode & (ANIM_HORIZONTAL | ANIM_VERTICAL))
5066       {
5067         struct GraphicInfo *g_part_1 = &graphic_info[part_1];
5068         struct GraphicInfo *g_part_2 = &graphic_info[part_2];
5069         int num_door_steps, num_panel_steps;
5070
5071         // remove door part graphics other than the two default wings
5072
5073         for (j = 0; door_part_controls[j].door_token != -1; j++)
5074         {
5075           struct DoorPartControlInfo *dpc = &door_part_controls[j];
5076           struct GraphicInfo *g = &graphic_info[dpc->graphic];
5077
5078           if (dpc->graphic >= part_3 &&
5079               dpc->graphic <= part_8)
5080             g->bitmap = NULL;
5081         }
5082
5083         // set graphics and screen positions of the default wings
5084
5085         g_part_1->width  = door_rect->width;
5086         g_part_1->height = door_rect->height;
5087         g_part_2->width  = door_rect->width;
5088         g_part_2->height = door_rect->height;
5089         g_part_2->src_x = door_rect->width;
5090         g_part_2->src_y = g_part_1->src_y;
5091
5092         door->part_2.x = door->part_1.x;
5093         door->part_2.y = door->part_1.y;
5094
5095         if (door->width != -1)
5096         {
5097           g_part_1->width = door->width;
5098           g_part_2->width = door->width;
5099
5100           // special treatment for graphics and screen position of right wing
5101           g_part_2->src_x += door_rect->width - door->width;
5102           door->part_2.x  += door_rect->width - door->width;
5103         }
5104
5105         if (door->height != -1)
5106         {
5107           g_part_1->height = door->height;
5108           g_part_2->height = door->height;
5109
5110           // special treatment for graphics and screen position of bottom wing
5111           g_part_2->src_y += door_rect->height - door->height;
5112           door->part_2.y  += door_rect->height - door->height;
5113         }
5114
5115         // set animation delays for the default wings and panels
5116
5117         door->part_1.step_delay = door->step_delay;
5118         door->part_2.step_delay = door->step_delay;
5119         door->panel.step_delay  = door->step_delay;
5120
5121         // set animation draw order for the default wings
5122
5123         door->part_1.sort_priority = 2; // draw left wing over ...
5124         door->part_2.sort_priority = 1; //          ... right wing
5125
5126         // set animation draw offset for the default wings
5127
5128         if (door->anim_mode & ANIM_HORIZONTAL)
5129         {
5130           door->part_1.step_xoffset = door->step_offset;
5131           door->part_1.step_yoffset = 0;
5132           door->part_2.step_xoffset = door->step_offset * -1;
5133           door->part_2.step_yoffset = 0;
5134
5135           num_door_steps = g_part_1->width / door->step_offset;
5136         }
5137         else    // ANIM_VERTICAL
5138         {
5139           door->part_1.step_xoffset = 0;
5140           door->part_1.step_yoffset = door->step_offset;
5141           door->part_2.step_xoffset = 0;
5142           door->part_2.step_yoffset = door->step_offset * -1;
5143
5144           num_door_steps = g_part_1->height / door->step_offset;
5145         }
5146
5147         // set animation draw offset for the default panels
5148
5149         if (door->step_offset > 1)
5150         {
5151           num_panel_steps = 2 * door_rect->height / door->step_offset;
5152           door->panel.start_step = num_panel_steps - num_door_steps;
5153           door->panel.start_step_closing = door->panel.start_step;
5154         }
5155         else
5156         {
5157           num_panel_steps = door_rect->height / door->step_offset;
5158           door->panel.start_step = num_panel_steps - num_door_steps / 2;
5159           door->panel.start_step_closing = door->panel.start_step;
5160           door->panel.step_delay *= 2;
5161         }
5162       }
5163     }
5164   }
5165 }
5166
5167 void InitDoors(void)
5168 {
5169   int i;
5170
5171   for (i = 0; door_part_controls[i].door_token != -1; i++)
5172   {
5173     struct DoorPartControlInfo *dpc = &door_part_controls[i];
5174     struct DoorPartOrderInfo *dpo = &door_part_order[i];
5175
5176     // initialize "start_step_opening" and "start_step_closing", if needed
5177     if (dpc->pos->start_step_opening == 0 &&
5178         dpc->pos->start_step_closing == 0)
5179     {
5180       // dpc->pos->start_step_opening = dpc->pos->start_step;
5181       dpc->pos->start_step_closing = dpc->pos->start_step;
5182     }
5183
5184     // fill structure for door part draw order (sorted below)
5185     dpo->nr = i;
5186     dpo->sort_priority = dpc->pos->sort_priority;
5187   }
5188
5189   // sort door part controls according to sort_priority and graphic number
5190   qsort(door_part_order, MAX_DOOR_PARTS,
5191         sizeof(struct DoorPartOrderInfo), compareDoorPartOrderInfo);
5192 }
5193
5194 unsigned int OpenDoor(unsigned int door_state)
5195 {
5196   if (door_state & DOOR_COPY_BACK)
5197   {
5198     if (door_state & DOOR_OPEN_1)
5199       BlitBitmap(bitmap_db_door_1, bitmap_db_door_1,
5200                  1 * DXSIZE, 0, DXSIZE, DYSIZE, 0 * DXSIZE, 0);
5201
5202     if (door_state & DOOR_OPEN_2)
5203       BlitBitmap(bitmap_db_door_2, bitmap_db_door_2,
5204                  1 * VXSIZE, 0, VXSIZE, VYSIZE, 0 * VXSIZE, 0);
5205
5206     door_state &= ~DOOR_COPY_BACK;
5207   }
5208
5209   return MoveDoor(door_state);
5210 }
5211
5212 unsigned int CloseDoor(unsigned int door_state)
5213 {
5214   unsigned int old_door_state = GetDoorState();
5215
5216   if (!(door_state & DOOR_NO_COPY_BACK))
5217   {
5218     if (old_door_state & DOOR_OPEN_1)
5219       BlitBitmap(backbuffer, bitmap_db_door_1,
5220                  DX, DY, DXSIZE, DYSIZE, 0, 0);
5221
5222     if (old_door_state & DOOR_OPEN_2)
5223       BlitBitmap(backbuffer, bitmap_db_door_2,
5224                  VX, VY, VXSIZE, VYSIZE, 0, 0);
5225
5226     door_state &= ~DOOR_NO_COPY_BACK;
5227   }
5228
5229   return MoveDoor(door_state);
5230 }
5231
5232 unsigned int GetDoorState(void)
5233 {
5234   return MoveDoor(DOOR_GET_STATE);
5235 }
5236
5237 unsigned int SetDoorState(unsigned int door_state)
5238 {
5239   return MoveDoor(door_state | DOOR_SET_STATE);
5240 }
5241
5242 static int euclid(int a, int b)
5243 {
5244   return (b ? euclid(b, a % b) : a);
5245 }
5246
5247 unsigned int MoveDoor(unsigned int door_state)
5248 {
5249   struct Rect door_rect_list[] =
5250   {
5251     { DX, DY, DXSIZE, DYSIZE },
5252     { VX, VY, VXSIZE, VYSIZE }
5253   };
5254   static int door1 = DOOR_CLOSE_1;
5255   static int door2 = DOOR_CLOSE_2;
5256   DelayCounter door_delay = { 0 };
5257   int i;
5258
5259   if (door_state == DOOR_GET_STATE)
5260     return (door1 | door2);
5261
5262   if (door_state & DOOR_SET_STATE)
5263   {
5264     if (door_state & DOOR_ACTION_1)
5265       door1 = door_state & DOOR_ACTION_1;
5266     if (door_state & DOOR_ACTION_2)
5267       door2 = door_state & DOOR_ACTION_2;
5268
5269     return (door1 | door2);
5270   }
5271
5272   if (!(door_state & DOOR_FORCE_REDRAW))
5273   {
5274     if (door1 == DOOR_OPEN_1 && door_state & DOOR_OPEN_1)
5275       door_state &= ~DOOR_OPEN_1;
5276     else if (door1 == DOOR_CLOSE_1 && door_state & DOOR_CLOSE_1)
5277       door_state &= ~DOOR_CLOSE_1;
5278     if (door2 == DOOR_OPEN_2 && door_state & DOOR_OPEN_2)
5279       door_state &= ~DOOR_OPEN_2;
5280     else if (door2 == DOOR_CLOSE_2 && door_state & DOOR_CLOSE_2)
5281       door_state &= ~DOOR_CLOSE_2;
5282   }
5283
5284   if (global.autoplay_leveldir)
5285   {
5286     door_state |= DOOR_NO_DELAY;
5287     door_state &= ~DOOR_CLOSE_ALL;
5288   }
5289
5290   if (game_status == GAME_MODE_EDITOR && !(door_state & DOOR_FORCE_ANIM))
5291     door_state |= DOOR_NO_DELAY;
5292
5293   if (door_state & DOOR_ACTION)
5294   {
5295     boolean game_ended = (game_status == GAME_MODE_PLAYING && checkGameEnded());
5296     boolean door_panel_drawn[NUM_DOORS];
5297     boolean panel_has_doors[NUM_DOORS];
5298     boolean door_part_skip[MAX_DOOR_PARTS];
5299     boolean door_part_done[MAX_DOOR_PARTS];
5300     boolean door_part_done_all;
5301     int num_steps[MAX_DOOR_PARTS];
5302     int max_move_delay = 0;     // delay for complete animations of all doors
5303     int max_step_delay = 0;     // delay (ms) between two animation frames
5304     int num_move_steps = 0;     // number of animation steps for all doors
5305     int max_move_delay_doors_only = 0;  // delay for doors only (no panel)
5306     int num_move_steps_doors_only = 0;  // steps for doors only (no panel)
5307     int start = 0;
5308     int k;
5309
5310     for (i = 0; i < NUM_DOORS; i++)
5311       panel_has_doors[i] = FALSE;
5312
5313     for (i = 0; i < MAX_DOOR_PARTS; i++)
5314     {
5315       struct DoorPartControlInfo *dpc = &door_part_controls[i];
5316       struct GraphicInfo *g = &graphic_info[dpc->graphic];
5317       int door_token = dpc->door_token;
5318
5319       door_part_done[i] = FALSE;
5320       door_part_skip[i] = (!(door_state & door_token) ||
5321                            !g->bitmap);
5322     }
5323
5324     for (i = 0; i < MAX_DOOR_PARTS; i++)
5325     {
5326       int nr = door_part_order[i].nr;
5327       struct DoorPartControlInfo *dpc = &door_part_controls[nr];
5328       struct DoorPartPosInfo *pos = dpc->pos;
5329       struct GraphicInfo *g = &graphic_info[dpc->graphic];
5330       int door_token = dpc->door_token;
5331       int door_index = DOOR_INDEX_FROM_TOKEN(door_token);
5332       boolean is_panel = DOOR_PART_IS_PANEL(nr);
5333       int step_xoffset = ABS(pos->step_xoffset);
5334       int step_yoffset = ABS(pos->step_yoffset);
5335       int step_delay = pos->step_delay;
5336       int current_door_state = door_state & door_token;
5337       boolean door_opening = ((current_door_state & DOOR_OPEN)  != 0);
5338       boolean door_closing = ((current_door_state & DOOR_CLOSE) != 0);
5339       boolean part_opening = (is_panel ? door_closing : door_opening);
5340       int start_step = (part_opening ? pos->start_step_opening :
5341                         pos->start_step_closing);
5342       float move_xsize = (step_xoffset ? g->width  : 0);
5343       float move_ysize = (step_yoffset ? g->height : 0);
5344       int move_xsteps = (step_xoffset ? ceil(move_xsize / step_xoffset) : 0);
5345       int move_ysteps = (step_yoffset ? ceil(move_ysize / step_yoffset) : 0);
5346       int move_steps = (move_xsteps && move_ysteps ?
5347                         MIN(move_xsteps, move_ysteps) :
5348                         move_xsteps ? move_xsteps : move_ysteps) - start_step;
5349       int move_delay = move_steps * step_delay;
5350
5351       if (door_part_skip[nr])
5352         continue;
5353
5354       max_move_delay = MAX(max_move_delay, move_delay);
5355       max_step_delay = (max_step_delay == 0 ? step_delay :
5356                         euclid(max_step_delay, step_delay));
5357       num_steps[nr] = move_steps;
5358
5359       if (!is_panel)
5360       {
5361         max_move_delay_doors_only = MAX(max_move_delay_doors_only, move_delay);
5362
5363         panel_has_doors[door_index] = TRUE;
5364       }
5365     }
5366
5367     max_step_delay = MAX(1, max_step_delay);    // prevent division by zero
5368
5369     num_move_steps = max_move_delay / max_step_delay;
5370     num_move_steps_doors_only = max_move_delay_doors_only / max_step_delay;
5371
5372     door_delay.value = max_step_delay;
5373
5374     if ((door_state & DOOR_NO_DELAY) || setup.quick_doors)
5375     {
5376       start = num_move_steps - 1;
5377     }
5378     else
5379     {
5380       // opening door sound has priority over simultaneously closing door
5381       if (door_state & (DOOR_OPEN_1 | DOOR_OPEN_2))
5382       {
5383         PlayMenuSoundStereo(SND_DOOR_OPENING, SOUND_MIDDLE);
5384
5385         if (door_state & DOOR_OPEN_1)
5386           PlayMenuSoundStereo(SND_DOOR_1_OPENING, SOUND_MIDDLE);
5387         if (door_state & DOOR_OPEN_2)
5388           PlayMenuSoundStereo(SND_DOOR_2_OPENING, SOUND_MIDDLE);
5389       }
5390       else if (door_state & (DOOR_CLOSE_1 | DOOR_CLOSE_2))
5391       {
5392         PlayMenuSoundStereo(SND_DOOR_CLOSING, SOUND_MIDDLE);
5393
5394         if (door_state & DOOR_CLOSE_1)
5395           PlayMenuSoundStereo(SND_DOOR_1_CLOSING, SOUND_MIDDLE);
5396         if (door_state & DOOR_CLOSE_2)
5397           PlayMenuSoundStereo(SND_DOOR_2_CLOSING, SOUND_MIDDLE);
5398       }
5399     }
5400
5401     for (k = start; k < num_move_steps; k++)
5402     {
5403       int last_frame = num_move_steps - 1;      // last frame of this "for" loop
5404
5405       door_part_done_all = TRUE;
5406
5407       for (i = 0; i < NUM_DOORS; i++)
5408         door_panel_drawn[i] = FALSE;
5409
5410       for (i = 0; i < MAX_DOOR_PARTS; i++)
5411       {
5412         int nr = door_part_order[i].nr;
5413         struct DoorPartControlInfo *dpc = &door_part_controls[nr];
5414         struct DoorPartPosInfo *pos = dpc->pos;
5415         struct GraphicInfo *g = &graphic_info[dpc->graphic];
5416         int door_token = dpc->door_token;
5417         int door_index = DOOR_INDEX_FROM_TOKEN(door_token);
5418         boolean is_panel = DOOR_PART_IS_PANEL(nr);
5419         boolean is_panel_and_door_has_closed = FALSE;
5420         struct Rect *door_rect = &door_rect_list[door_index];
5421         Bitmap *bitmap_db_door = (door_token == DOOR_1 ? bitmap_db_door_1 :
5422                                   bitmap_db_door_2);
5423         Bitmap *bitmap = (is_panel ? bitmap_db_door : g->bitmap);
5424         int current_door_state = door_state & door_token;
5425         boolean door_opening = ((current_door_state & DOOR_OPEN)  != 0);
5426         boolean door_closing = !door_opening;
5427         boolean part_opening = (is_panel ? door_closing : door_opening);
5428         boolean part_closing = !part_opening;
5429         int start_step = (part_opening ? pos->start_step_opening :
5430                           pos->start_step_closing);
5431         int step_delay = pos->step_delay;
5432         int step_factor = step_delay / max_step_delay;
5433         int k1 = (step_factor ? k / step_factor + 1 : k);
5434         int k2 = (part_opening ? k1 + start_step : num_steps[nr] - k1);
5435         int kk = MAX(0, k2);
5436         int g_src_x = 0;
5437         int g_src_y = 0;
5438         int src_x, src_y, src_xx, src_yy;
5439         int dst_x, dst_y, dst_xx, dst_yy;
5440         int width, height;
5441
5442         if (door_part_skip[nr])
5443           continue;
5444
5445         if (!(door_state & door_token))
5446           continue;
5447
5448         if (!g->bitmap)
5449           continue;
5450
5451         if (!is_panel)
5452         {
5453           int k2_door = (door_opening ? k : num_move_steps_doors_only - k - 1);
5454           int kk_door = MAX(0, k2_door);
5455           int sync_frame = kk_door * door_delay.value;
5456           int frame = getGraphicAnimationFrame(dpc->graphic, sync_frame);
5457
5458           getFixedGraphicSource(dpc->graphic, frame, &bitmap,
5459                                 &g_src_x, &g_src_y);
5460         }
5461
5462         // draw door panel
5463
5464         if (!door_panel_drawn[door_index])
5465         {
5466           ClearRectangle(drawto, door_rect->x, door_rect->y,
5467                          door_rect->width, door_rect->height);
5468
5469           door_panel_drawn[door_index] = TRUE;
5470         }
5471
5472         // draw opening or closing door parts
5473
5474         if (pos->step_xoffset < 0)      // door part on right side
5475         {
5476           src_xx = 0;
5477           dst_xx = pos->x + ABS(kk * pos->step_xoffset);
5478           width = g->width;
5479
5480           if (dst_xx + width > door_rect->width)
5481             width = door_rect->width - dst_xx;
5482         }
5483         else                            // door part on left side
5484         {
5485           src_xx = 0;
5486           dst_xx = pos->x - kk * pos->step_xoffset;
5487
5488           if (dst_xx < 0)
5489           {
5490             src_xx = ABS(dst_xx);
5491             dst_xx = 0;
5492           }
5493
5494           width = g->width - src_xx;
5495
5496           if (width > door_rect->width)
5497             width = door_rect->width;
5498
5499           // Debug("tools:MoveDoor", "k == %d [%d]", k, start_step);
5500         }
5501
5502         if (pos->step_yoffset < 0)      // door part on bottom side
5503         {
5504           src_yy = 0;
5505           dst_yy = pos->y + ABS(kk * pos->step_yoffset);
5506           height = g->height;
5507
5508           if (dst_yy + height > door_rect->height)
5509             height = door_rect->height - dst_yy;
5510         }
5511         else                            // door part on top side
5512         {
5513           src_yy = 0;
5514           dst_yy = pos->y - kk * pos->step_yoffset;
5515
5516           if (dst_yy < 0)
5517           {
5518             src_yy = ABS(dst_yy);
5519             dst_yy = 0;
5520           }
5521
5522           height = g->height - src_yy;
5523         }
5524
5525         src_x = g_src_x + src_xx;
5526         src_y = g_src_y + src_yy;
5527
5528         dst_x = door_rect->x + dst_xx;
5529         dst_y = door_rect->y + dst_yy;
5530
5531         is_panel_and_door_has_closed =
5532           (is_panel &&
5533            door_closing &&
5534            panel_has_doors[door_index] &&
5535            k >= num_move_steps_doors_only - 1);
5536
5537         if (width  >= 0 && width  <= g->width &&
5538             height >= 0 && height <= g->height &&
5539             !is_panel_and_door_has_closed)
5540         {
5541           if (is_panel || !pos->draw_masked)
5542             BlitBitmap(bitmap, drawto, src_x, src_y, width, height,
5543                        dst_x, dst_y);
5544           else
5545             BlitBitmapMasked(bitmap, drawto, src_x, src_y, width, height,
5546                              dst_x, dst_y);
5547         }
5548
5549         redraw_mask |= REDRAW_DOOR_FROM_TOKEN(door_token);
5550
5551         if ((part_opening && (width < 0         || height < 0)) ||
5552             (part_closing && (width >= g->width && height >= g->height)))
5553           door_part_done[nr] = TRUE;
5554
5555         // continue door part animations, but not panel after door has closed
5556         if (!door_part_done[nr] && !is_panel_and_door_has_closed)
5557           door_part_done_all = FALSE;
5558       }
5559
5560       if (!(door_state & DOOR_NO_DELAY))
5561       {
5562         if (game_ended)
5563           HandleGameActions();
5564
5565         BackToFront();
5566
5567         SkipUntilDelayReached(&door_delay, &k, last_frame);
5568
5569         // prevent OS (Windows) from complaining about program not responding
5570         CheckQuitEvent();
5571       }
5572
5573       if (door_part_done_all)
5574         break;
5575     }
5576
5577     if (!(door_state & DOOR_NO_DELAY))
5578     {
5579       // wait for specified door action post delay
5580       if (door_state & DOOR_ACTION_1 && door_state & DOOR_ACTION_2)
5581         door_delay.value = MAX(door_1.post_delay, door_2.post_delay);
5582       else if (door_state & DOOR_ACTION_1)
5583         door_delay.value = door_1.post_delay;
5584       else if (door_state & DOOR_ACTION_2)
5585         door_delay.value = door_2.post_delay;
5586
5587       while (!DelayReached(&door_delay))
5588       {
5589         if (game_ended)
5590           HandleGameActions();
5591
5592         BackToFront();
5593       }
5594     }
5595   }
5596
5597   if (door_state & DOOR_ACTION_1)
5598     door1 = door_state & DOOR_ACTION_1;
5599   if (door_state & DOOR_ACTION_2)
5600     door2 = door_state & DOOR_ACTION_2;
5601
5602   // draw masked border over door area
5603   DrawMaskedBorder(REDRAW_DOOR_1);
5604   DrawMaskedBorder(REDRAW_DOOR_2);
5605
5606   ClearAutoRepeatKeyEvents();
5607
5608   return (door1 | door2);
5609 }
5610
5611 static boolean useSpecialEditorDoor(void)
5612 {
5613   int graphic = IMG_GLOBAL_BORDER_EDITOR;
5614   boolean redefined = getImageListEntryFromImageID(graphic)->redefined;
5615
5616   // do not draw special editor door if editor border defined or redefined
5617   if (graphic_info[graphic].bitmap != NULL || redefined)
5618     return FALSE;
5619
5620   // do not draw special editor door if global border defined to be empty
5621   if (graphic_info[IMG_GLOBAL_BORDER].bitmap == NULL)
5622     return FALSE;
5623
5624   // do not draw special editor door if viewport definitions do not match
5625   if (EX != VX ||
5626       EY >= VY ||
5627       EXSIZE != VXSIZE ||
5628       EY + EYSIZE != VY + VYSIZE)
5629     return FALSE;
5630
5631   return TRUE;
5632 }
5633
5634 void DrawSpecialEditorDoor(void)
5635 {
5636   struct GraphicInfo *gfx1 = &graphic_info[IMG_DOOR_2_TOP_BORDER_CORRECTION];
5637   int top_border_width = gfx1->width;
5638   int top_border_height = gfx1->height;
5639   int outer_border = viewport.door_2[GAME_MODE_EDITOR].border_size;
5640   int ex = EX - outer_border;
5641   int ey = EY - outer_border;
5642   int vy = VY - outer_border;
5643   int exsize = EXSIZE + 2 * outer_border;
5644
5645   if (!useSpecialEditorDoor())
5646     return;
5647
5648   // draw bigger level editor toolbox window
5649   BlitBitmap(gfx1->bitmap, drawto, gfx1->src_x, gfx1->src_y,
5650              top_border_width, top_border_height, ex, ey - top_border_height);
5651   BlitBitmap(graphic_info[IMG_GLOBAL_BORDER].bitmap, drawto, ex, vy,
5652              exsize, EYSIZE - VYSIZE + outer_border, ex, ey);
5653
5654   redraw_mask |= REDRAW_ALL;
5655 }
5656
5657 void UndrawSpecialEditorDoor(void)
5658 {
5659   struct GraphicInfo *gfx1 = &graphic_info[IMG_DOOR_2_TOP_BORDER_CORRECTION];
5660   int top_border_width = gfx1->width;
5661   int top_border_height = gfx1->height;
5662   int outer_border = viewport.door_2[GAME_MODE_EDITOR].border_size;
5663   int ex = EX - outer_border;
5664   int ey = EY - outer_border;
5665   int ey_top = ey - top_border_height;
5666   int exsize = EXSIZE + 2 * outer_border;
5667   int eysize = EYSIZE + 2 * outer_border;
5668
5669   if (!useSpecialEditorDoor())
5670     return;
5671
5672   // draw normal tape recorder window
5673   if (graphic_info[IMG_GLOBAL_BORDER].bitmap)
5674   {
5675     BlitBitmap(graphic_info[IMG_GLOBAL_BORDER].bitmap, drawto,
5676                ex, ey_top, top_border_width, top_border_height,
5677                ex, ey_top);
5678     BlitBitmap(graphic_info[IMG_GLOBAL_BORDER].bitmap, drawto,
5679                ex, ey, exsize, eysize, ex, ey);
5680   }
5681   else
5682   {
5683     // if screen background is set to "[NONE]", clear editor toolbox window
5684     ClearRectangle(drawto, ex, ey_top, top_border_width, top_border_height);
5685     ClearRectangle(drawto, ex, ey, exsize, eysize);
5686   }
5687
5688   redraw_mask |= REDRAW_ALL;
5689 }
5690
5691
5692 // ---------- new tool button stuff -------------------------------------------
5693
5694 static struct
5695 {
5696   int graphic;
5697   struct TextPosInfo *pos;
5698   int gadget_id;
5699   boolean is_touch_button;
5700   char *infotext;
5701 } toolbutton_info[NUM_TOOL_BUTTONS] =
5702 {
5703   {
5704     IMG_GFX_REQUEST_BUTTON_YES,         &request.button.yes,
5705     TOOL_CTRL_ID_YES, FALSE,            "yes"
5706   },
5707   {
5708     IMG_GFX_REQUEST_BUTTON_NO,          &request.button.no,
5709     TOOL_CTRL_ID_NO, FALSE,             "no"
5710   },
5711   {
5712     IMG_GFX_REQUEST_BUTTON_CONFIRM,     &request.button.confirm,
5713     TOOL_CTRL_ID_CONFIRM, FALSE,        "confirm"
5714   },
5715   {
5716     IMG_GFX_REQUEST_BUTTON_PLAYER_1,    &request.button.player_1,
5717     TOOL_CTRL_ID_PLAYER_1, FALSE,       "player 1"
5718   },
5719   {
5720     IMG_GFX_REQUEST_BUTTON_PLAYER_2,    &request.button.player_2,
5721     TOOL_CTRL_ID_PLAYER_2, FALSE,       "player 2"
5722   },
5723   {
5724     IMG_GFX_REQUEST_BUTTON_PLAYER_3,    &request.button.player_3,
5725     TOOL_CTRL_ID_PLAYER_3, FALSE,       "player 3"
5726   },
5727   {
5728     IMG_GFX_REQUEST_BUTTON_PLAYER_4,    &request.button.player_4,
5729     TOOL_CTRL_ID_PLAYER_4, FALSE,       "player 4"
5730   },
5731   {
5732     IMG_GFX_REQUEST_BUTTON_TOUCH_YES,   &request.button.touch_yes,
5733     TOOL_CTRL_ID_TOUCH_YES, TRUE,       "yes"
5734   },
5735   {
5736     IMG_GFX_REQUEST_BUTTON_TOUCH_NO,    &request.button.touch_no,
5737     TOOL_CTRL_ID_TOUCH_NO, TRUE,        "no"
5738   },
5739   {
5740     IMG_GFX_REQUEST_BUTTON_TOUCH_CONFIRM, &request.button.touch_confirm,
5741     TOOL_CTRL_ID_TOUCH_CONFIRM, TRUE,   "confirm"
5742   }
5743 };
5744
5745 void CreateToolButtons(void)
5746 {
5747   int i;
5748
5749   for (i = 0; i < NUM_TOOL_BUTTONS; i++)
5750   {
5751     int graphic = toolbutton_info[i].graphic;
5752     struct GraphicInfo *gfx = &graphic_info[graphic];
5753     struct TextPosInfo *pos = toolbutton_info[i].pos;
5754     struct GadgetInfo *gi;
5755     Bitmap *deco_bitmap = None;
5756     int deco_x = 0, deco_y = 0, deco_xpos = 0, deco_ypos = 0;
5757     unsigned int event_mask = GD_EVENT_RELEASED;
5758     boolean is_touch_button = toolbutton_info[i].is_touch_button;
5759     int base_x = (is_touch_button ? 0 : DX);
5760     int base_y = (is_touch_button ? 0 : DY);
5761     int gd_x = gfx->src_x;
5762     int gd_y = gfx->src_y;
5763     int gd_xp = gfx->src_x + gfx->pressed_xoffset;
5764     int gd_yp = gfx->src_y + gfx->pressed_yoffset;
5765     int x = pos->x;
5766     int y = pos->y;
5767     int id = i;
5768
5769     // do not use touch buttons if overlay touch buttons are disabled
5770     if (is_touch_button && !setup.touch.overlay_buttons)
5771       continue;
5772
5773     if (global.use_envelope_request && !is_touch_button)
5774     {
5775       setRequestPosition(&base_x, &base_y, TRUE);
5776
5777       // check if request buttons are outside of envelope and fix, if needed
5778       if (x < 0 || x + gfx->width  > request.width ||
5779           y < 0 || y + gfx->height > request.height)
5780       {
5781         if (id == TOOL_CTRL_ID_YES)
5782         {
5783           x = 0;
5784           y = request.height - 2 * request.border_size - gfx->height;
5785         }
5786         else if (id == TOOL_CTRL_ID_NO)
5787         {
5788           x = request.width  - 2 * request.border_size - gfx->width;
5789           y = request.height - 2 * request.border_size - gfx->height;
5790         }
5791         else if (id == TOOL_CTRL_ID_CONFIRM)
5792         {
5793           x = (request.width - 2 * request.border_size - gfx->width) / 2;
5794           y = request.height - 2 * request.border_size - gfx->height;
5795         }
5796         else if (id >= TOOL_CTRL_ID_PLAYER_1 && id <= TOOL_CTRL_ID_PLAYER_4)
5797         {
5798           int player_nr = id - TOOL_CTRL_ID_PLAYER_1;
5799
5800           x = (request.width - 2 * request.border_size - gfx->width) / 2;
5801           y = request.height - 2 * request.border_size - gfx->height * 2;
5802
5803           x += (player_nr == 3 ? -1 : player_nr == 1 ? +1 : 0) * gfx->width;
5804           y += (player_nr == 0 ? -1 : player_nr == 2 ? +1 : 0) * gfx->height;
5805         }
5806       }
5807     }
5808
5809     if (id >= TOOL_CTRL_ID_PLAYER_1 && id <= TOOL_CTRL_ID_PLAYER_4 &&
5810         pos->draw_player)
5811     {
5812       int player_nr = id - TOOL_CTRL_ID_PLAYER_1;
5813
5814       getSizedGraphicSource(PLAYER_NR_GFX(IMG_PLAYER_1, player_nr), 0,
5815                             pos->size, &deco_bitmap, &deco_x, &deco_y);
5816       deco_xpos = (gfx->width  - pos->size) / 2;
5817       deco_ypos = (gfx->height - pos->size) / 2;
5818     }
5819
5820     gi = CreateGadget(GDI_CUSTOM_ID, id,
5821                       GDI_IMAGE_ID, graphic,
5822                       GDI_INFO_TEXT, toolbutton_info[i].infotext,
5823                       GDI_X, base_x + x,
5824                       GDI_Y, base_y + y,
5825                       GDI_WIDTH, gfx->width,
5826                       GDI_HEIGHT, gfx->height,
5827                       GDI_TYPE, GD_TYPE_NORMAL_BUTTON,
5828                       GDI_STATE, GD_BUTTON_UNPRESSED,
5829                       GDI_DESIGN_UNPRESSED, gfx->bitmap, gd_x, gd_y,
5830                       GDI_DESIGN_PRESSED, gfx->bitmap, gd_xp, gd_yp,
5831                       GDI_DECORATION_DESIGN, deco_bitmap, deco_x, deco_y,
5832                       GDI_DECORATION_POSITION, deco_xpos, deco_ypos,
5833                       GDI_DECORATION_SIZE, pos->size, pos->size,
5834                       GDI_DECORATION_SHIFTING, 1, 1,
5835                       GDI_DIRECT_DRAW, FALSE,
5836                       GDI_OVERLAY_TOUCH_BUTTON, is_touch_button,
5837                       GDI_EVENT_MASK, event_mask,
5838                       GDI_CALLBACK_ACTION, HandleToolButtons,
5839                       GDI_END);
5840
5841     if (gi == NULL)
5842       Fail("cannot create gadget");
5843
5844     tool_gadget[id] = gi;
5845   }
5846 }
5847
5848 void FreeToolButtons(void)
5849 {
5850   int i;
5851
5852   for (i = 0; i < NUM_TOOL_BUTTONS; i++)
5853     FreeGadget(tool_gadget[i]);
5854 }
5855
5856 static void MapToolButtons(unsigned int req_state)
5857 {
5858   if (req_state & REQ_ASK)
5859   {
5860     MapGadget(tool_gadget[TOOL_CTRL_ID_YES]);
5861     MapGadget(tool_gadget[TOOL_CTRL_ID_NO]);
5862     MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_YES]);
5863     MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_NO]);
5864   }
5865   else if (req_state & REQ_CONFIRM)
5866   {
5867     MapGadget(tool_gadget[TOOL_CTRL_ID_CONFIRM]);
5868     MapGadget(tool_gadget[TOOL_CTRL_ID_TOUCH_CONFIRM]);
5869   }
5870   else if (req_state & REQ_PLAYER)
5871   {
5872     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_1]);
5873     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_2]);
5874     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_3]);
5875     MapGadget(tool_gadget[TOOL_CTRL_ID_PLAYER_4]);
5876   }
5877 }
5878
5879 static void UnmapToolButtons(void)
5880 {
5881   int i;
5882
5883   for (i = 0; i < NUM_TOOL_BUTTONS; i++)
5884     UnmapGadget(tool_gadget[i]);
5885 }
5886
5887 static void HandleToolButtons(struct GadgetInfo *gi)
5888 {
5889   request_gadget_id = gi->custom_id;
5890 }
5891
5892 static struct Mapping_EM_to_RND_object
5893 {
5894   int element_em;
5895   boolean is_rnd_to_em_mapping;         // unique mapping EM <-> RND
5896   boolean is_backside;                  // backside of moving element
5897
5898   int element_rnd;
5899   int action;
5900   int direction;
5901 }
5902 em_object_mapping_list[GAME_TILE_MAX + 1] =
5903 {
5904   {
5905     Zborder,                            FALSE,  FALSE,
5906     EL_EMPTY,                           -1, -1
5907   },
5908   {
5909     Zplayer,                            FALSE,  FALSE,
5910     EL_EMPTY,                           -1, -1
5911   },
5912
5913   {
5914     Zbug,                               FALSE,  FALSE,
5915     EL_EMPTY,                           -1, -1
5916   },
5917   {
5918     Ztank,                              FALSE,  FALSE,
5919     EL_EMPTY,                           -1, -1
5920   },
5921   {
5922     Zeater,                             FALSE,  FALSE,
5923     EL_EMPTY,                           -1, -1
5924   },
5925   {
5926     Zdynamite,                          FALSE,  FALSE,
5927     EL_EMPTY,                           -1, -1
5928   },
5929   {
5930     Zboom,                              FALSE,  FALSE,
5931     EL_EMPTY,                           -1, -1
5932   },
5933
5934   {
5935     Xchain,                             FALSE,  FALSE,
5936     EL_DEFAULT,                         ACTION_EXPLODING, -1
5937   },
5938   {
5939     Xboom_bug,                          FALSE,  FALSE,
5940     EL_BUG,                             ACTION_EXPLODING, -1
5941   },
5942   {
5943     Xboom_tank,                         FALSE,  FALSE,
5944     EL_SPACESHIP,                       ACTION_EXPLODING, -1
5945   },
5946   {
5947     Xboom_android,                      FALSE,  FALSE,
5948     EL_EMC_ANDROID,                     ACTION_OTHER, -1
5949   },
5950   {
5951     Xboom_1,                            FALSE,  FALSE,
5952     EL_DEFAULT,                         ACTION_EXPLODING, -1
5953   },
5954   {
5955     Xboom_2,                            FALSE,  FALSE,
5956     EL_DEFAULT,                         ACTION_EXPLODING, -1
5957   },
5958
5959   {
5960     Xblank,                             TRUE,   FALSE,
5961     EL_EMPTY,                           -1, -1
5962   },
5963
5964   {
5965     Xsplash_e,                          FALSE,  FALSE,
5966     EL_ACID_SPLASH_RIGHT,               -1, -1
5967   },
5968   {
5969     Xsplash_w,                          FALSE,  FALSE,
5970     EL_ACID_SPLASH_LEFT,                -1, -1
5971   },
5972
5973   {
5974     Xplant,                             TRUE,   FALSE,
5975     EL_EMC_PLANT,                       -1, -1
5976   },
5977   {
5978     Yplant,                             FALSE,  FALSE,
5979     EL_EMC_PLANT,                       -1, -1
5980   },
5981
5982   {
5983     Xacid_1,                            TRUE,   FALSE,
5984     EL_ACID,                            -1, -1
5985   },
5986   {
5987     Xacid_2,                            FALSE,  FALSE,
5988     EL_ACID,                            -1, -1
5989   },
5990   {
5991     Xacid_3,                            FALSE,  FALSE,
5992     EL_ACID,                            -1, -1
5993   },
5994   {
5995     Xacid_4,                            FALSE,  FALSE,
5996     EL_ACID,                            -1, -1
5997   },
5998   {
5999     Xacid_5,                            FALSE,  FALSE,
6000     EL_ACID,                            -1, -1
6001   },
6002   {
6003     Xacid_6,                            FALSE,  FALSE,
6004     EL_ACID,                            -1, -1
6005   },
6006   {
6007     Xacid_7,                            FALSE,  FALSE,
6008     EL_ACID,                            -1, -1
6009   },
6010   {
6011     Xacid_8,                            FALSE,  FALSE,
6012     EL_ACID,                            -1, -1
6013   },
6014
6015   {
6016     Xfake_acid_1,                       TRUE,   FALSE,
6017     EL_EMC_FAKE_ACID,                   -1, -1
6018   },
6019   {
6020     Xfake_acid_2,                       FALSE,  FALSE,
6021     EL_EMC_FAKE_ACID,                   -1, -1
6022   },
6023   {
6024     Xfake_acid_3,                       FALSE,  FALSE,
6025     EL_EMC_FAKE_ACID,                   -1, -1
6026   },
6027   {
6028     Xfake_acid_4,                       FALSE,  FALSE,
6029     EL_EMC_FAKE_ACID,                   -1, -1
6030   },
6031   {
6032     Xfake_acid_5,                       FALSE,  FALSE,
6033     EL_EMC_FAKE_ACID,                   -1, -1
6034   },
6035   {
6036     Xfake_acid_6,                       FALSE,  FALSE,
6037     EL_EMC_FAKE_ACID,                   -1, -1
6038   },
6039   {
6040     Xfake_acid_7,                       FALSE,  FALSE,
6041     EL_EMC_FAKE_ACID,                   -1, -1
6042   },
6043   {
6044     Xfake_acid_8,                       FALSE,  FALSE,
6045     EL_EMC_FAKE_ACID,                   -1, -1
6046   },
6047
6048   {
6049     Xfake_acid_1_player,                FALSE,  FALSE,
6050     EL_EMC_FAKE_ACID,                   -1, -1
6051   },
6052   {
6053     Xfake_acid_2_player,                FALSE,  FALSE,
6054     EL_EMC_FAKE_ACID,                   -1, -1
6055   },
6056   {
6057     Xfake_acid_3_player,                FALSE,  FALSE,
6058     EL_EMC_FAKE_ACID,                   -1, -1
6059   },
6060   {
6061     Xfake_acid_4_player,                FALSE,  FALSE,
6062     EL_EMC_FAKE_ACID,                   -1, -1
6063   },
6064   {
6065     Xfake_acid_5_player,                FALSE,  FALSE,
6066     EL_EMC_FAKE_ACID,                   -1, -1
6067   },
6068   {
6069     Xfake_acid_6_player,                FALSE,  FALSE,
6070     EL_EMC_FAKE_ACID,                   -1, -1
6071   },
6072   {
6073     Xfake_acid_7_player,                FALSE,  FALSE,
6074     EL_EMC_FAKE_ACID,                   -1, -1
6075   },
6076   {
6077     Xfake_acid_8_player,                FALSE,  FALSE,
6078     EL_EMC_FAKE_ACID,                   -1, -1
6079   },
6080
6081   {
6082     Xgrass,                             TRUE,   FALSE,
6083     EL_EMC_GRASS,                       -1, -1
6084   },
6085   {
6086     Ygrass_nB,                          FALSE,  FALSE,
6087     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_UP
6088   },
6089   {
6090     Ygrass_eB,                          FALSE,  FALSE,
6091     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_RIGHT
6092   },
6093   {
6094     Ygrass_sB,                          FALSE,  FALSE,
6095     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_DOWN
6096   },
6097   {
6098     Ygrass_wB,                          FALSE,  FALSE,
6099     EL_EMC_GRASS,                       ACTION_DIGGING, MV_BIT_LEFT
6100   },
6101
6102   {
6103     Xdirt,                              TRUE,   FALSE,
6104     EL_SAND,                            -1, -1
6105   },
6106   {
6107     Ydirt_nB,                           FALSE,  FALSE,
6108     EL_SAND,                            ACTION_DIGGING, MV_BIT_UP
6109   },
6110   {
6111     Ydirt_eB,                           FALSE,  FALSE,
6112     EL_SAND,                            ACTION_DIGGING, MV_BIT_RIGHT
6113   },
6114   {
6115     Ydirt_sB,                           FALSE,  FALSE,
6116     EL_SAND,                            ACTION_DIGGING, MV_BIT_DOWN
6117   },
6118   {
6119     Ydirt_wB,                           FALSE,  FALSE,
6120     EL_SAND,                            ACTION_DIGGING, MV_BIT_LEFT
6121   },
6122
6123   {
6124     Xandroid,                           TRUE,   FALSE,
6125     EL_EMC_ANDROID,                     ACTION_ACTIVE, -1
6126   },
6127   {
6128     Xandroid_1_n,                       FALSE,  FALSE,
6129     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_UP
6130   },
6131   {
6132     Xandroid_2_n,                       FALSE,  FALSE,
6133     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_UP
6134   },
6135   {
6136     Xandroid_1_e,                       FALSE,  FALSE,
6137     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_RIGHT
6138   },
6139   {
6140     Xandroid_2_e,                       FALSE,  FALSE,
6141     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_RIGHT
6142   },
6143   {
6144     Xandroid_1_w,                       FALSE,  FALSE,
6145     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_LEFT
6146   },
6147   {
6148     Xandroid_2_w,                       FALSE,  FALSE,
6149     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_LEFT
6150   },
6151   {
6152     Xandroid_1_s,                       FALSE,  FALSE,
6153     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_DOWN
6154   },
6155   {
6156     Xandroid_2_s,                       FALSE,  FALSE,
6157     EL_EMC_ANDROID,                     ACTION_ACTIVE, MV_BIT_DOWN
6158   },
6159   {
6160     Yandroid_n,                         FALSE,  FALSE,
6161     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_UP
6162   },
6163   {
6164     Yandroid_nB,                        FALSE,  TRUE,
6165     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_UP
6166   },
6167   {
6168     Yandroid_ne,                        FALSE,  FALSE,
6169     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_UPRIGHT
6170   },
6171   {
6172     Yandroid_neB,                       FALSE,  TRUE,
6173     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_UPRIGHT
6174   },
6175   {
6176     Yandroid_e,                         FALSE,  FALSE,
6177     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_RIGHT
6178   },
6179   {
6180     Yandroid_eB,                        FALSE,  TRUE,
6181     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_RIGHT
6182   },
6183   {
6184     Yandroid_se,                        FALSE,  FALSE,
6185     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_DOWNRIGHT
6186   },
6187   {
6188     Yandroid_seB,                       FALSE,  TRUE,
6189     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_DOWNRIGHT
6190   },
6191   {
6192     Yandroid_s,                         FALSE,  FALSE,
6193     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_DOWN
6194   },
6195   {
6196     Yandroid_sB,                        FALSE,  TRUE,
6197     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_DOWN
6198   },
6199   {
6200     Yandroid_sw,                        FALSE,  FALSE,
6201     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_DOWNLEFT
6202   },
6203   {
6204     Yandroid_swB,                       FALSE,  TRUE,
6205     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_DOWNLEFT
6206   },
6207   {
6208     Yandroid_w,                         FALSE,  FALSE,
6209     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_LEFT
6210   },
6211   {
6212     Yandroid_wB,                        FALSE,  TRUE,
6213     EL_EMC_ANDROID,                     ACTION_MOVING, MV_BIT_LEFT
6214   },
6215   {
6216     Yandroid_nw,                        FALSE,  FALSE,
6217     EL_EMC_ANDROID,                     ACTION_GROWING, MV_BIT_UPLEFT
6218   },
6219   {
6220     Yandroid_nwB,                       FALSE,  TRUE,
6221     EL_EMC_ANDROID,                     ACTION_SHRINKING, MV_BIT_UPLEFT
6222   },
6223
6224   {
6225     Xeater_n,                           TRUE,   FALSE,
6226     EL_YAMYAM_UP,                       -1, -1
6227   },
6228   {
6229     Xeater_e,                           TRUE,   FALSE,
6230     EL_YAMYAM_RIGHT,                    -1, -1
6231   },
6232   {
6233     Xeater_w,                           TRUE,   FALSE,
6234     EL_YAMYAM_LEFT,                     -1, -1
6235   },
6236   {
6237     Xeater_s,                           TRUE,   FALSE,
6238     EL_YAMYAM_DOWN,                     -1, -1
6239   },
6240   {
6241     Yeater_n,                           FALSE,  FALSE,
6242     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_UP
6243   },
6244   {
6245     Yeater_nB,                          FALSE,  TRUE,
6246     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_UP
6247   },
6248   {
6249     Yeater_e,                           FALSE,  FALSE,
6250     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_RIGHT
6251   },
6252   {
6253     Yeater_eB,                          FALSE,  TRUE,
6254     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_RIGHT
6255   },
6256   {
6257     Yeater_s,                           FALSE,  FALSE,
6258     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_DOWN
6259   },
6260   {
6261     Yeater_sB,                          FALSE,  TRUE,
6262     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_DOWN
6263   },
6264   {
6265     Yeater_w,                           FALSE,  FALSE,
6266     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_LEFT
6267   },
6268   {
6269     Yeater_wB,                          FALSE,  TRUE,
6270     EL_YAMYAM,                          ACTION_MOVING, MV_BIT_LEFT
6271   },
6272   {
6273     Yeater_stone,                       FALSE,  FALSE,
6274     EL_YAMYAM,                          ACTION_SMASHED_BY_ROCK, -1
6275   },
6276   {
6277     Yeater_spring,                      FALSE,  FALSE,
6278     EL_YAMYAM,                          ACTION_SMASHED_BY_SPRING, -1
6279   },
6280
6281   {
6282     Xalien,                             TRUE,   FALSE,
6283     EL_ROBOT,                           -1, -1
6284   },
6285   {
6286     Xalien_pause,                       FALSE,  FALSE,
6287     EL_ROBOT,                           -1, -1
6288   },
6289   {
6290     Yalien_n,                           FALSE,  FALSE,
6291     EL_ROBOT,                           ACTION_MOVING, MV_BIT_UP
6292   },
6293   {
6294     Yalien_nB,                          FALSE,  TRUE,
6295     EL_ROBOT,                           ACTION_MOVING, MV_BIT_UP
6296   },
6297   {
6298     Yalien_e,                           FALSE,  FALSE,
6299     EL_ROBOT,                           ACTION_MOVING, MV_BIT_RIGHT
6300   },
6301   {
6302     Yalien_eB,                          FALSE,  TRUE,
6303     EL_ROBOT,                           ACTION_MOVING, MV_BIT_RIGHT
6304   },
6305   {
6306     Yalien_s,                           FALSE,  FALSE,
6307     EL_ROBOT,                           ACTION_MOVING, MV_BIT_DOWN
6308   },
6309   {
6310     Yalien_sB,                          FALSE,  TRUE,
6311     EL_ROBOT,                           ACTION_MOVING, MV_BIT_DOWN
6312   },
6313   {
6314     Yalien_w,                           FALSE,  FALSE,
6315     EL_ROBOT,                           ACTION_MOVING, MV_BIT_LEFT
6316   },
6317   {
6318     Yalien_wB,                          FALSE,  TRUE,
6319     EL_ROBOT,                           ACTION_MOVING, MV_BIT_LEFT
6320   },
6321   {
6322     Yalien_stone,                       FALSE,  FALSE,
6323     EL_ROBOT,                           ACTION_SMASHED_BY_ROCK, -1
6324   },
6325   {
6326     Yalien_spring,                      FALSE,  FALSE,
6327     EL_ROBOT,                           ACTION_SMASHED_BY_SPRING, -1
6328   },
6329
6330   {
6331     Xbug_1_n,                           TRUE,   FALSE,
6332     EL_BUG_UP,                          -1, -1
6333   },
6334   {
6335     Xbug_1_e,                           TRUE,   FALSE,
6336     EL_BUG_RIGHT,                       -1, -1
6337   },
6338   {
6339     Xbug_1_s,                           TRUE,   FALSE,
6340     EL_BUG_DOWN,                        -1, -1
6341   },
6342   {
6343     Xbug_1_w,                           TRUE,   FALSE,
6344     EL_BUG_LEFT,                        -1, -1
6345   },
6346   {
6347     Xbug_2_n,                           FALSE,  FALSE,
6348     EL_BUG_UP,                          -1, -1
6349   },
6350   {
6351     Xbug_2_e,                           FALSE,  FALSE,
6352     EL_BUG_RIGHT,                       -1, -1
6353   },
6354   {
6355     Xbug_2_s,                           FALSE,  FALSE,
6356     EL_BUG_DOWN,                        -1, -1
6357   },
6358   {
6359     Xbug_2_w,                           FALSE,  FALSE,
6360     EL_BUG_LEFT,                        -1, -1
6361   },
6362   {
6363     Ybug_n,                             FALSE,  FALSE,
6364     EL_BUG,                             ACTION_MOVING, MV_BIT_UP
6365   },
6366   {
6367     Ybug_nB,                            FALSE,  TRUE,
6368     EL_BUG,                             ACTION_MOVING, MV_BIT_UP
6369   },
6370   {
6371     Ybug_e,                             FALSE,  FALSE,
6372     EL_BUG,                             ACTION_MOVING, MV_BIT_RIGHT
6373   },
6374   {
6375     Ybug_eB,                            FALSE,  TRUE,
6376     EL_BUG,                             ACTION_MOVING, MV_BIT_RIGHT
6377   },
6378   {
6379     Ybug_s,                             FALSE,  FALSE,
6380     EL_BUG,                             ACTION_MOVING, MV_BIT_DOWN
6381   },
6382   {
6383     Ybug_sB,                            FALSE,  TRUE,
6384     EL_BUG,                             ACTION_MOVING, MV_BIT_DOWN
6385   },
6386   {
6387     Ybug_w,                             FALSE,  FALSE,
6388     EL_BUG,                             ACTION_MOVING, MV_BIT_LEFT
6389   },
6390   {
6391     Ybug_wB,                            FALSE,  TRUE,
6392     EL_BUG,                             ACTION_MOVING, MV_BIT_LEFT
6393   },
6394   {
6395     Ybug_w_n,                           FALSE,  FALSE,
6396     EL_BUG,                             ACTION_TURNING_FROM_LEFT, MV_BIT_UP
6397   },
6398   {
6399     Ybug_n_e,                           FALSE,  FALSE,
6400     EL_BUG,                             ACTION_TURNING_FROM_UP, MV_BIT_RIGHT
6401   },
6402   {
6403     Ybug_e_s,                           FALSE,  FALSE,
6404     EL_BUG,                             ACTION_TURNING_FROM_RIGHT, MV_BIT_DOWN
6405   },
6406   {
6407     Ybug_s_w,                           FALSE,  FALSE,
6408     EL_BUG,                             ACTION_TURNING_FROM_DOWN, MV_BIT_LEFT
6409   },
6410   {
6411     Ybug_e_n,                           FALSE,  FALSE,
6412     EL_BUG,                             ACTION_TURNING_FROM_RIGHT, MV_BIT_UP
6413   },
6414   {
6415     Ybug_s_e,                           FALSE,  FALSE,
6416     EL_BUG,                             ACTION_TURNING_FROM_DOWN, MV_BIT_RIGHT
6417   },
6418   {
6419     Ybug_w_s,                           FALSE,  FALSE,
6420     EL_BUG,                             ACTION_TURNING_FROM_LEFT, MV_BIT_DOWN
6421   },
6422   {
6423     Ybug_n_w,                           FALSE,  FALSE,
6424     EL_BUG,                             ACTION_TURNING_FROM_UP, MV_BIT_LEFT
6425   },
6426   {
6427     Ybug_stone,                         FALSE,  FALSE,
6428     EL_BUG,                             ACTION_SMASHED_BY_ROCK, -1
6429   },
6430   {
6431     Ybug_spring,                        FALSE,  FALSE,
6432     EL_BUG,                             ACTION_SMASHED_BY_SPRING, -1
6433   },
6434
6435   {
6436     Xtank_1_n,                          TRUE,   FALSE,
6437     EL_SPACESHIP_UP,                    -1, -1
6438   },
6439   {
6440     Xtank_1_e,                          TRUE,   FALSE,
6441     EL_SPACESHIP_RIGHT,                 -1, -1
6442   },
6443   {
6444     Xtank_1_s,                          TRUE,   FALSE,
6445     EL_SPACESHIP_DOWN,                  -1, -1
6446   },
6447   {
6448     Xtank_1_w,                          TRUE,   FALSE,
6449     EL_SPACESHIP_LEFT,                  -1, -1
6450   },
6451   {
6452     Xtank_2_n,                          FALSE,  FALSE,
6453     EL_SPACESHIP_UP,                    -1, -1
6454   },
6455   {
6456     Xtank_2_e,                          FALSE,  FALSE,
6457     EL_SPACESHIP_RIGHT,                 -1, -1
6458   },
6459   {
6460     Xtank_2_s,                          FALSE,  FALSE,
6461     EL_SPACESHIP_DOWN,                  -1, -1
6462   },
6463   {
6464     Xtank_2_w,                          FALSE,  FALSE,
6465     EL_SPACESHIP_LEFT,                  -1, -1
6466   },
6467   {
6468     Ytank_n,                            FALSE,  FALSE,
6469     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_UP
6470   },
6471   {
6472     Ytank_nB,                           FALSE,  TRUE,
6473     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_UP
6474   },
6475   {
6476     Ytank_e,                            FALSE,  FALSE,
6477     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_RIGHT
6478   },
6479   {
6480     Ytank_eB,                           FALSE,  TRUE,
6481     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_RIGHT
6482   },
6483   {
6484     Ytank_s,                            FALSE,  FALSE,
6485     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_DOWN
6486   },
6487   {
6488     Ytank_sB,                           FALSE,  TRUE,
6489     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_DOWN
6490   },
6491   {
6492     Ytank_w,                            FALSE,  FALSE,
6493     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_LEFT
6494   },
6495   {
6496     Ytank_wB,                           FALSE,  TRUE,
6497     EL_SPACESHIP,                       ACTION_MOVING, MV_BIT_LEFT
6498   },
6499   {
6500     Ytank_w_n,                          FALSE,  FALSE,
6501     EL_SPACESHIP,                       ACTION_TURNING_FROM_LEFT, MV_BIT_UP
6502   },
6503   {
6504     Ytank_n_e,                          FALSE,  FALSE,
6505     EL_SPACESHIP,                       ACTION_TURNING_FROM_UP, MV_BIT_RIGHT
6506   },
6507   {
6508     Ytank_e_s,                          FALSE,  FALSE,
6509     EL_SPACESHIP,                       ACTION_TURNING_FROM_RIGHT, MV_BIT_DOWN
6510   },
6511   {
6512     Ytank_s_w,                          FALSE,  FALSE,
6513     EL_SPACESHIP,                       ACTION_TURNING_FROM_DOWN, MV_BIT_LEFT
6514   },
6515   {
6516     Ytank_e_n,                          FALSE,  FALSE,
6517     EL_SPACESHIP,                       ACTION_TURNING_FROM_RIGHT, MV_BIT_UP
6518   },
6519   {
6520     Ytank_s_e,                          FALSE,  FALSE,
6521     EL_SPACESHIP,                       ACTION_TURNING_FROM_DOWN, MV_BIT_RIGHT
6522   },
6523   {
6524     Ytank_w_s,                          FALSE,  FALSE,
6525     EL_SPACESHIP,                       ACTION_TURNING_FROM_LEFT, MV_BIT_DOWN
6526   },
6527   {
6528     Ytank_n_w,                          FALSE,  FALSE,
6529     EL_SPACESHIP,                       ACTION_TURNING_FROM_UP, MV_BIT_LEFT
6530   },
6531   {
6532     Ytank_stone,                        FALSE,  FALSE,
6533     EL_SPACESHIP,                       ACTION_SMASHED_BY_ROCK, -1
6534   },
6535   {
6536     Ytank_spring,                       FALSE,  FALSE,
6537     EL_SPACESHIP,                       ACTION_SMASHED_BY_SPRING, -1
6538   },
6539
6540   {
6541     Xemerald,                           TRUE,   FALSE,
6542     EL_EMERALD,                         -1, -1
6543   },
6544   {
6545     Xemerald_pause,                     FALSE,  FALSE,
6546     EL_EMERALD,                         -1, -1
6547   },
6548   {
6549     Xemerald_fall,                      FALSE,  FALSE,
6550     EL_EMERALD,                         -1, -1
6551   },
6552   {
6553     Xemerald_shine,                     FALSE,  FALSE,
6554     EL_EMERALD,                         ACTION_TWINKLING, -1
6555   },
6556   {
6557     Yemerald_s,                         FALSE,  FALSE,
6558     EL_EMERALD,                         ACTION_FALLING, -1
6559   },
6560   {
6561     Yemerald_sB,                        FALSE,  TRUE,
6562     EL_EMERALD,                         ACTION_FALLING, -1
6563   },
6564   {
6565     Yemerald_e,                         FALSE,  FALSE,
6566     EL_EMERALD,                         ACTION_MOVING, MV_BIT_RIGHT
6567   },
6568   {
6569     Yemerald_eB,                        FALSE,  TRUE,
6570     EL_EMERALD,                         ACTION_MOVING, MV_BIT_RIGHT
6571   },
6572   {
6573     Yemerald_w,                         FALSE,  FALSE,
6574     EL_EMERALD,                         ACTION_MOVING, MV_BIT_LEFT
6575   },
6576   {
6577     Yemerald_wB,                        FALSE,  TRUE,
6578     EL_EMERALD,                         ACTION_MOVING, MV_BIT_LEFT
6579   },
6580   {
6581     Yemerald_blank,                     FALSE,  FALSE,
6582     EL_EMERALD,                         ACTION_COLLECTING, -1
6583   },
6584
6585   {
6586     Xdiamond,                           TRUE,   FALSE,
6587     EL_DIAMOND,                         -1, -1
6588   },
6589   {
6590     Xdiamond_pause,                     FALSE,  FALSE,
6591     EL_DIAMOND,                         -1, -1
6592   },
6593   {
6594     Xdiamond_fall,                      FALSE,  FALSE,
6595     EL_DIAMOND,                         -1, -1
6596   },
6597   {
6598     Xdiamond_shine,                     FALSE,  FALSE,
6599     EL_DIAMOND,                         ACTION_TWINKLING, -1
6600   },
6601   {
6602     Ydiamond_s,                         FALSE,  FALSE,
6603     EL_DIAMOND,                         ACTION_FALLING, -1
6604   },
6605   {
6606     Ydiamond_sB,                        FALSE,  TRUE,
6607     EL_DIAMOND,                         ACTION_FALLING, -1
6608   },
6609   {
6610     Ydiamond_e,                         FALSE,  FALSE,
6611     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_RIGHT
6612   },
6613   {
6614     Ydiamond_eB,                        FALSE,  TRUE,
6615     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_RIGHT
6616   },
6617   {
6618     Ydiamond_w,                         FALSE,  FALSE,
6619     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_LEFT
6620   },
6621   {
6622     Ydiamond_wB,                        FALSE,  TRUE,
6623     EL_DIAMOND,                         ACTION_MOVING, MV_BIT_LEFT
6624   },
6625   {
6626     Ydiamond_blank,                     FALSE,  FALSE,
6627     EL_DIAMOND,                         ACTION_COLLECTING, -1
6628   },
6629   {
6630     Ydiamond_stone,                     FALSE,  FALSE,
6631     EL_DIAMOND,                         ACTION_SMASHED_BY_ROCK, -1
6632   },
6633
6634   {
6635     Xstone,                             TRUE,   FALSE,
6636     EL_ROCK,                            -1, -1
6637   },
6638   {
6639     Xstone_pause,                       FALSE,  FALSE,
6640     EL_ROCK,                            -1, -1
6641   },
6642   {
6643     Xstone_fall,                        FALSE,  FALSE,
6644     EL_ROCK,                            -1, -1
6645   },
6646   {
6647     Ystone_s,                           FALSE,  FALSE,
6648     EL_ROCK,                            ACTION_FALLING, -1
6649   },
6650   {
6651     Ystone_sB,                          FALSE,  TRUE,
6652     EL_ROCK,                            ACTION_FALLING, -1
6653   },
6654   {
6655     Ystone_e,                           FALSE,  FALSE,
6656     EL_ROCK,                            ACTION_MOVING, MV_BIT_RIGHT
6657   },
6658   {
6659     Ystone_eB,                          FALSE,  TRUE,
6660     EL_ROCK,                            ACTION_MOVING, MV_BIT_RIGHT
6661   },
6662   {
6663     Ystone_w,                           FALSE,  FALSE,
6664     EL_ROCK,                            ACTION_MOVING, MV_BIT_LEFT
6665   },
6666   {
6667     Ystone_wB,                          FALSE,  TRUE,
6668     EL_ROCK,                            ACTION_MOVING, MV_BIT_LEFT
6669   },
6670
6671   {
6672     Xbomb,                              TRUE,   FALSE,
6673     EL_BOMB,                            -1, -1
6674   },
6675   {
6676     Xbomb_pause,                        FALSE,  FALSE,
6677     EL_BOMB,                            -1, -1
6678   },
6679   {
6680     Xbomb_fall,                         FALSE,  FALSE,
6681     EL_BOMB,                            -1, -1
6682   },
6683   {
6684     Ybomb_s,                            FALSE,  FALSE,
6685     EL_BOMB,                            ACTION_FALLING, -1
6686   },
6687   {
6688     Ybomb_sB,                           FALSE,  TRUE,
6689     EL_BOMB,                            ACTION_FALLING, -1
6690   },
6691   {
6692     Ybomb_e,                            FALSE,  FALSE,
6693     EL_BOMB,                            ACTION_MOVING, MV_BIT_RIGHT
6694   },
6695   {
6696     Ybomb_eB,                           FALSE,  TRUE,
6697     EL_BOMB,                            ACTION_MOVING, MV_BIT_RIGHT
6698   },
6699   {
6700     Ybomb_w,                            FALSE,  FALSE,
6701     EL_BOMB,                            ACTION_MOVING, MV_BIT_LEFT
6702   },
6703   {
6704     Ybomb_wB,                           FALSE,  TRUE,
6705     EL_BOMB,                            ACTION_MOVING, MV_BIT_LEFT
6706   },
6707   {
6708     Ybomb_blank,                        FALSE,  FALSE,
6709     EL_BOMB,                            ACTION_ACTIVATING, -1
6710   },
6711
6712   {
6713     Xnut,                               TRUE,   FALSE,
6714     EL_NUT,                             -1, -1
6715   },
6716   {
6717     Xnut_pause,                         FALSE,  FALSE,
6718     EL_NUT,                             -1, -1
6719   },
6720   {
6721     Xnut_fall,                          FALSE,  FALSE,
6722     EL_NUT,                             -1, -1
6723   },
6724   {
6725     Ynut_s,                             FALSE,  FALSE,
6726     EL_NUT,                             ACTION_FALLING, -1
6727   },
6728   {
6729     Ynut_sB,                            FALSE,  TRUE,
6730     EL_NUT,                             ACTION_FALLING, -1
6731   },
6732   {
6733     Ynut_e,                             FALSE,  FALSE,
6734     EL_NUT,                             ACTION_MOVING, MV_BIT_RIGHT
6735   },
6736   {
6737     Ynut_eB,                            FALSE,  TRUE,
6738     EL_NUT,                             ACTION_MOVING, MV_BIT_RIGHT
6739   },
6740   {
6741     Ynut_w,                             FALSE,  FALSE,
6742     EL_NUT,                             ACTION_MOVING, MV_BIT_LEFT
6743   },
6744   {
6745     Ynut_wB,                            FALSE,  TRUE,
6746     EL_NUT,                             ACTION_MOVING, MV_BIT_LEFT
6747   },
6748   {
6749     Ynut_stone,                         FALSE,  FALSE,
6750     EL_NUT,                             ACTION_BREAKING, -1
6751   },
6752
6753   {
6754     Xspring,                            TRUE,   FALSE,
6755     EL_SPRING,                          -1, -1
6756   },
6757   {
6758     Xspring_pause,                      FALSE,  FALSE,
6759     EL_SPRING,                          -1, -1
6760   },
6761   {
6762     Xspring_e,                          TRUE,   FALSE,
6763     EL_SPRING_RIGHT,                    -1, -1
6764   },
6765   {
6766     Xspring_w,                          TRUE,   FALSE,
6767     EL_SPRING_LEFT,                     -1, -1
6768   },
6769   {
6770     Xspring_fall,                       FALSE,  FALSE,
6771     EL_SPRING,                          -1, -1
6772   },
6773   {
6774     Yspring_s,                          FALSE,  FALSE,
6775     EL_SPRING,                          ACTION_FALLING, -1
6776   },
6777   {
6778     Yspring_sB,                         FALSE,  TRUE,
6779     EL_SPRING,                          ACTION_FALLING, -1
6780   },
6781   {
6782     Yspring_e,                          FALSE,  FALSE,
6783     EL_SPRING,                          ACTION_MOVING, MV_BIT_RIGHT
6784   },
6785   {
6786     Yspring_eB,                         FALSE,  TRUE,
6787     EL_SPRING,                          ACTION_MOVING, MV_BIT_RIGHT
6788   },
6789   {
6790     Yspring_w,                          FALSE,  FALSE,
6791     EL_SPRING,                          ACTION_MOVING, MV_BIT_LEFT
6792   },
6793   {
6794     Yspring_wB,                         FALSE,  TRUE,
6795     EL_SPRING,                          ACTION_MOVING, MV_BIT_LEFT
6796   },
6797   {
6798     Yspring_alien_e,                    FALSE,  FALSE,
6799     EL_SPRING,                          ACTION_EATING, MV_BIT_RIGHT
6800   },
6801   {
6802     Yspring_alien_eB,                   FALSE,  TRUE,
6803     EL_SPRING,                          ACTION_EATING, MV_BIT_RIGHT
6804   },
6805   {
6806     Yspring_alien_w,                    FALSE,  FALSE,
6807     EL_SPRING,                          ACTION_EATING, MV_BIT_LEFT
6808   },
6809   {
6810     Yspring_alien_wB,                   FALSE,  TRUE,
6811     EL_SPRING,                          ACTION_EATING, MV_BIT_LEFT
6812   },
6813
6814   {
6815     Xpush_emerald_e,                    FALSE,  FALSE,
6816     EL_EMERALD,                         -1, MV_BIT_RIGHT
6817   },
6818   {
6819     Xpush_emerald_w,                    FALSE,  FALSE,
6820     EL_EMERALD,                         -1, MV_BIT_LEFT
6821   },
6822   {
6823     Xpush_diamond_e,                    FALSE,  FALSE,
6824     EL_DIAMOND,                         -1, MV_BIT_RIGHT
6825   },
6826   {
6827     Xpush_diamond_w,                    FALSE,  FALSE,
6828     EL_DIAMOND,                         -1, MV_BIT_LEFT
6829   },
6830   {
6831     Xpush_stone_e,                      FALSE,  FALSE,
6832     EL_ROCK,                            -1, MV_BIT_RIGHT
6833   },
6834   {
6835     Xpush_stone_w,                      FALSE,  FALSE,
6836     EL_ROCK,                            -1, MV_BIT_LEFT
6837   },
6838   {
6839     Xpush_bomb_e,                       FALSE,  FALSE,
6840     EL_BOMB,                            -1, MV_BIT_RIGHT
6841   },
6842   {
6843     Xpush_bomb_w,                       FALSE,  FALSE,
6844     EL_BOMB,                            -1, MV_BIT_LEFT
6845   },
6846   {
6847     Xpush_nut_e,                        FALSE,  FALSE,
6848     EL_NUT,                             -1, MV_BIT_RIGHT
6849   },
6850   {
6851     Xpush_nut_w,                        FALSE,  FALSE,
6852     EL_NUT,                             -1, MV_BIT_LEFT
6853   },
6854   {
6855     Xpush_spring_e,                     FALSE,  FALSE,
6856     EL_SPRING_RIGHT,                    -1, MV_BIT_RIGHT
6857   },
6858   {
6859     Xpush_spring_w,                     FALSE,  FALSE,
6860     EL_SPRING_LEFT,                     -1, MV_BIT_LEFT
6861   },
6862
6863   {
6864     Xdynamite,                          TRUE,   FALSE,
6865     EL_EM_DYNAMITE,                     -1, -1
6866   },
6867   {
6868     Ydynamite_blank,                    FALSE,  FALSE,
6869     EL_EM_DYNAMITE,                     ACTION_COLLECTING, -1
6870   },
6871   {
6872     Xdynamite_1,                        TRUE,   FALSE,
6873     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6874   },
6875   {
6876     Xdynamite_2,                        FALSE,  FALSE,
6877     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6878   },
6879   {
6880     Xdynamite_3,                        FALSE,  FALSE,
6881     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6882   },
6883   {
6884     Xdynamite_4,                        FALSE,  FALSE,
6885     EL_EM_DYNAMITE_ACTIVE,              -1, -1
6886   },
6887
6888   {
6889     Xkey_1,                             TRUE,   FALSE,
6890     EL_EM_KEY_1,                        -1, -1
6891   },
6892   {
6893     Xkey_2,                             TRUE,   FALSE,
6894     EL_EM_KEY_2,                        -1, -1
6895   },
6896   {
6897     Xkey_3,                             TRUE,   FALSE,
6898     EL_EM_KEY_3,                        -1, -1
6899   },
6900   {
6901     Xkey_4,                             TRUE,   FALSE,
6902     EL_EM_KEY_4,                        -1, -1
6903   },
6904   {
6905     Xkey_5,                             TRUE,   FALSE,
6906     EL_EMC_KEY_5,                       -1, -1
6907   },
6908   {
6909     Xkey_6,                             TRUE,   FALSE,
6910     EL_EMC_KEY_6,                       -1, -1
6911   },
6912   {
6913     Xkey_7,                             TRUE,   FALSE,
6914     EL_EMC_KEY_7,                       -1, -1
6915   },
6916   {
6917     Xkey_8,                             TRUE,   FALSE,
6918     EL_EMC_KEY_8,                       -1, -1
6919   },
6920
6921   {
6922     Xdoor_1,                            TRUE,   FALSE,
6923     EL_EM_GATE_1,                       -1, -1
6924   },
6925   {
6926     Xdoor_2,                            TRUE,   FALSE,
6927     EL_EM_GATE_2,                       -1, -1
6928   },
6929   {
6930     Xdoor_3,                            TRUE,   FALSE,
6931     EL_EM_GATE_3,                       -1, -1
6932   },
6933   {
6934     Xdoor_4,                            TRUE,   FALSE,
6935     EL_EM_GATE_4,                       -1, -1
6936   },
6937   {
6938     Xdoor_5,                            TRUE,   FALSE,
6939     EL_EMC_GATE_5,                      -1, -1
6940   },
6941   {
6942     Xdoor_6,                            TRUE,   FALSE,
6943     EL_EMC_GATE_6,                      -1, -1
6944   },
6945   {
6946     Xdoor_7,                            TRUE,   FALSE,
6947     EL_EMC_GATE_7,                      -1, -1
6948   },
6949   {
6950     Xdoor_8,                            TRUE,   FALSE,
6951     EL_EMC_GATE_8,                      -1, -1
6952   },
6953
6954   {
6955     Xfake_door_1,                       TRUE,   FALSE,
6956     EL_EM_GATE_1_GRAY,                  -1, -1
6957   },
6958   {
6959     Xfake_door_2,                       TRUE,   FALSE,
6960     EL_EM_GATE_2_GRAY,                  -1, -1
6961   },
6962   {
6963     Xfake_door_3,                       TRUE,   FALSE,
6964     EL_EM_GATE_3_GRAY,                  -1, -1
6965   },
6966   {
6967     Xfake_door_4,                       TRUE,   FALSE,
6968     EL_EM_GATE_4_GRAY,                  -1, -1
6969   },
6970   {
6971     Xfake_door_5,                       TRUE,   FALSE,
6972     EL_EMC_GATE_5_GRAY,                 -1, -1
6973   },
6974   {
6975     Xfake_door_6,                       TRUE,   FALSE,
6976     EL_EMC_GATE_6_GRAY,                 -1, -1
6977   },
6978   {
6979     Xfake_door_7,                       TRUE,   FALSE,
6980     EL_EMC_GATE_7_GRAY,                 -1, -1
6981   },
6982   {
6983     Xfake_door_8,                       TRUE,   FALSE,
6984     EL_EMC_GATE_8_GRAY,                 -1, -1
6985   },
6986
6987   {
6988     Xballoon,                           TRUE,   FALSE,
6989     EL_BALLOON,                         -1, -1
6990   },
6991   {
6992     Yballoon_n,                         FALSE,  FALSE,
6993     EL_BALLOON,                         ACTION_MOVING, MV_BIT_UP
6994   },
6995   {
6996     Yballoon_nB,                        FALSE,  TRUE,
6997     EL_BALLOON,                         ACTION_MOVING, MV_BIT_UP
6998   },
6999   {
7000     Yballoon_e,                         FALSE,  FALSE,
7001     EL_BALLOON,                         ACTION_MOVING, MV_BIT_RIGHT
7002   },
7003   {
7004     Yballoon_eB,                        FALSE,  TRUE,
7005     EL_BALLOON,                         ACTION_MOVING, MV_BIT_RIGHT
7006   },
7007   {
7008     Yballoon_s,                         FALSE,  FALSE,
7009     EL_BALLOON,                         ACTION_MOVING, MV_BIT_DOWN
7010   },
7011   {
7012     Yballoon_sB,                        FALSE,  TRUE,
7013     EL_BALLOON,                         ACTION_MOVING, MV_BIT_DOWN
7014   },
7015   {
7016     Yballoon_w,                         FALSE,  FALSE,
7017     EL_BALLOON,                         ACTION_MOVING, MV_BIT_LEFT
7018   },
7019   {
7020     Yballoon_wB,                        FALSE,  TRUE,
7021     EL_BALLOON,                         ACTION_MOVING, MV_BIT_LEFT
7022   },
7023
7024   {
7025     Xball_1,                            TRUE,   FALSE,
7026     EL_EMC_MAGIC_BALL,                  -1, -1
7027   },
7028   {
7029     Yball_1,                            FALSE,  FALSE,
7030     EL_EMC_MAGIC_BALL,                  ACTION_ACTIVE, -1
7031   },
7032   {
7033     Xball_2,                            FALSE,  FALSE,
7034     EL_EMC_MAGIC_BALL,                  ACTION_ACTIVE, -1
7035   },
7036   {
7037     Yball_2,                            FALSE,  FALSE,
7038     EL_EMC_MAGIC_BALL,                  ACTION_ACTIVE, -1
7039   },
7040   {
7041     Yball_blank,                        FALSE,  FALSE,
7042     EL_EMC_MAGIC_BALL,                  ACTION_DROPPING, -1
7043   },
7044
7045   {
7046     Xamoeba_1,                          TRUE,   FALSE,
7047     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
7048   },
7049   {
7050     Xamoeba_2,                          FALSE,  FALSE,
7051     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
7052   },
7053   {
7054     Xamoeba_3,                          FALSE,  FALSE,
7055     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
7056   },
7057   {
7058     Xamoeba_4,                          FALSE,  FALSE,
7059     EL_AMOEBA_DRY,                      ACTION_OTHER, -1
7060   },
7061   {
7062     Xamoeba_5,                          TRUE,   FALSE,
7063     EL_AMOEBA_WET,                      ACTION_OTHER, -1
7064   },
7065   {
7066     Xamoeba_6,                          FALSE,  FALSE,
7067     EL_AMOEBA_WET,                      ACTION_OTHER, -1
7068   },
7069   {
7070     Xamoeba_7,                          FALSE,  FALSE,
7071     EL_AMOEBA_WET,                      ACTION_OTHER, -1
7072   },
7073   {
7074     Xamoeba_8,                          FALSE,  FALSE,
7075     EL_AMOEBA_WET,                      ACTION_OTHER, -1
7076   },
7077
7078   {
7079     Xdrip,                              TRUE,   FALSE,
7080     EL_AMOEBA_DROP,                     ACTION_GROWING, -1
7081   },
7082   {
7083     Xdrip_fall,                         FALSE,  FALSE,
7084     EL_AMOEBA_DROP,                     -1, -1
7085   },
7086   {
7087     Xdrip_stretch,                      FALSE,  FALSE,
7088     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
7089   },
7090   {
7091     Xdrip_stretchB,                     FALSE,  TRUE,
7092     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
7093   },
7094   {
7095     Ydrip_1_s,                          FALSE,  FALSE,
7096     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
7097   },
7098   {
7099     Ydrip_1_sB,                         FALSE,  TRUE,
7100     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
7101   },
7102   {
7103     Ydrip_2_s,                          FALSE,  FALSE,
7104     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
7105   },
7106   {
7107     Ydrip_2_sB,                         FALSE,  TRUE,
7108     EL_AMOEBA_DROP,                     ACTION_FALLING, -1
7109   },
7110
7111   {
7112     Xwonderwall,                        TRUE,   FALSE,
7113     EL_MAGIC_WALL,                      -1, -1
7114   },
7115   {
7116     Ywonderwall,                        FALSE,  FALSE,
7117     EL_MAGIC_WALL,                      ACTION_ACTIVE, -1
7118   },
7119
7120   {
7121     Xwheel,                             TRUE,   FALSE,
7122     EL_ROBOT_WHEEL,                     -1, -1
7123   },
7124   {
7125     Ywheel,                             FALSE,  FALSE,
7126     EL_ROBOT_WHEEL,                     ACTION_ACTIVE, -1
7127   },
7128
7129   {
7130     Xswitch,                            TRUE,   FALSE,
7131     EL_EMC_MAGIC_BALL_SWITCH,           -1, -1
7132   },
7133   {
7134     Yswitch,                            FALSE,  FALSE,
7135     EL_EMC_MAGIC_BALL_SWITCH,           ACTION_ACTIVE, -1
7136   },
7137
7138   {
7139     Xbumper,                            TRUE,   FALSE,
7140     EL_EMC_SPRING_BUMPER,               -1, -1
7141   },
7142   {
7143     Ybumper,                            FALSE,  FALSE,
7144     EL_EMC_SPRING_BUMPER,               ACTION_ACTIVE, -1
7145   },
7146
7147   {
7148     Xacid_nw,                           TRUE,   FALSE,
7149     EL_ACID_POOL_TOPLEFT,               -1, -1
7150   },
7151   {
7152     Xacid_ne,                           TRUE,   FALSE,
7153     EL_ACID_POOL_TOPRIGHT,              -1, -1
7154   },
7155   {
7156     Xacid_sw,                           TRUE,   FALSE,
7157     EL_ACID_POOL_BOTTOMLEFT,            -1, -1
7158   },
7159   {
7160     Xacid_s,                            TRUE,   FALSE,
7161     EL_ACID_POOL_BOTTOM,                -1, -1
7162   },
7163   {
7164     Xacid_se,                           TRUE,   FALSE,
7165     EL_ACID_POOL_BOTTOMRIGHT,           -1, -1
7166   },
7167
7168   {
7169     Xfake_blank,                        TRUE,   FALSE,
7170     EL_INVISIBLE_WALL,                  -1, -1
7171   },
7172   {
7173     Yfake_blank,                        FALSE,  FALSE,
7174     EL_INVISIBLE_WALL,                  ACTION_ACTIVE, -1
7175   },
7176
7177   {
7178     Xfake_grass,                        TRUE,   FALSE,
7179     EL_EMC_FAKE_GRASS,                  -1, -1
7180   },
7181   {
7182     Yfake_grass,                        FALSE,  FALSE,
7183     EL_EMC_FAKE_GRASS,                  ACTION_ACTIVE, -1
7184   },
7185
7186   {
7187     Xfake_amoeba,                       TRUE,   FALSE,
7188     EL_EMC_DRIPPER,                     -1, -1
7189   },
7190   {
7191     Yfake_amoeba,                       FALSE,  FALSE,
7192     EL_EMC_DRIPPER,                     ACTION_ACTIVE, -1
7193   },
7194
7195   {
7196     Xlenses,                            TRUE,   FALSE,
7197     EL_EMC_LENSES,                      -1, -1
7198   },
7199
7200   {
7201     Xmagnify,                           TRUE,   FALSE,
7202     EL_EMC_MAGNIFIER,                   -1, -1
7203   },
7204
7205   {
7206     Xsand,                              TRUE,   FALSE,
7207     EL_QUICKSAND_EMPTY,                 -1, -1
7208   },
7209   {
7210     Xsand_stone,                        TRUE,   FALSE,
7211     EL_QUICKSAND_FULL,                  -1, -1
7212   },
7213   {
7214     Xsand_stonein_1,                    FALSE,  TRUE,
7215     EL_ROCK,                            ACTION_FILLING, -1
7216   },
7217   {
7218     Xsand_stonein_2,                    FALSE,  TRUE,
7219     EL_ROCK,                            ACTION_FILLING, -1
7220   },
7221   {
7222     Xsand_stonein_3,                    FALSE,  TRUE,
7223     EL_ROCK,                            ACTION_FILLING, -1
7224   },
7225   {
7226     Xsand_stonein_4,                    FALSE,  TRUE,
7227     EL_ROCK,                            ACTION_FILLING, -1
7228   },
7229   {
7230     Xsand_sandstone_1,                  FALSE,  FALSE,
7231     EL_QUICKSAND_FILLING,               -1, -1
7232   },
7233   {
7234     Xsand_sandstone_2,                  FALSE,  FALSE,
7235     EL_QUICKSAND_FILLING,               -1, -1
7236   },
7237   {
7238     Xsand_sandstone_3,                  FALSE,  FALSE,
7239     EL_QUICKSAND_FILLING,               -1, -1
7240   },
7241   {
7242     Xsand_sandstone_4,                  FALSE,  FALSE,
7243     EL_QUICKSAND_FILLING,               -1, -1
7244   },
7245   {
7246     Xsand_stonesand_1,                  FALSE,  FALSE,
7247     EL_QUICKSAND_EMPTYING,              -1, -1
7248   },
7249   {
7250     Xsand_stonesand_2,                  FALSE,  FALSE,
7251     EL_QUICKSAND_EMPTYING,              -1, -1
7252   },
7253   {
7254     Xsand_stonesand_3,                  FALSE,  FALSE,
7255     EL_QUICKSAND_EMPTYING,              -1, -1
7256   },
7257   {
7258     Xsand_stonesand_4,                  FALSE,  FALSE,
7259     EL_QUICKSAND_EMPTYING,              -1, -1
7260   },
7261   {
7262     Xsand_stoneout_1,                   FALSE,  FALSE,
7263     EL_ROCK,                            ACTION_EMPTYING, -1
7264   },
7265   {
7266     Xsand_stoneout_2,                   FALSE,  FALSE,
7267     EL_ROCK,                            ACTION_EMPTYING, -1
7268   },
7269   {
7270     Xsand_stonesand_quickout_1,         FALSE,  FALSE,
7271     EL_QUICKSAND_EMPTYING,              -1, -1
7272   },
7273   {
7274     Xsand_stonesand_quickout_2,         FALSE,  FALSE,
7275     EL_QUICKSAND_EMPTYING,              -1, -1
7276   },
7277
7278   {
7279     Xslide_ns,                          TRUE,   FALSE,
7280     EL_EXPANDABLE_WALL_VERTICAL,        -1, -1
7281   },
7282   {
7283     Yslide_ns_blank,                    FALSE,  FALSE,
7284     EL_EXPANDABLE_WALL_VERTICAL,        ACTION_GROWING, -1
7285   },
7286   {
7287     Xslide_ew,                          TRUE,   FALSE,
7288     EL_EXPANDABLE_WALL_HORIZONTAL,      -1, -1
7289   },
7290   {
7291     Yslide_ew_blank,                    FALSE,  FALSE,
7292     EL_EXPANDABLE_WALL_HORIZONTAL,      ACTION_GROWING, -1
7293   },
7294
7295   {
7296     Xwind_n,                            TRUE,   FALSE,
7297     EL_BALLOON_SWITCH_UP,               -1, -1
7298   },
7299   {
7300     Xwind_e,                            TRUE,   FALSE,
7301     EL_BALLOON_SWITCH_RIGHT,            -1, -1
7302   },
7303   {
7304     Xwind_s,                            TRUE,   FALSE,
7305     EL_BALLOON_SWITCH_DOWN,             -1, -1
7306   },
7307   {
7308     Xwind_w,                            TRUE,   FALSE,
7309     EL_BALLOON_SWITCH_LEFT,             -1, -1
7310   },
7311   {
7312     Xwind_any,                          TRUE,   FALSE,
7313     EL_BALLOON_SWITCH_ANY,              -1, -1
7314   },
7315   {
7316     Xwind_stop,                         TRUE,   FALSE,
7317     EL_BALLOON_SWITCH_NONE,             -1, -1
7318   },
7319
7320   {
7321     Xexit,                              TRUE,   FALSE,
7322     EL_EM_EXIT_CLOSED,                  -1, -1
7323   },
7324   {
7325     Xexit_1,                            TRUE,   FALSE,
7326     EL_EM_EXIT_OPEN,                    -1, -1
7327   },
7328   {
7329     Xexit_2,                            FALSE,  FALSE,
7330     EL_EM_EXIT_OPEN,                    -1, -1
7331   },
7332   {
7333     Xexit_3,                            FALSE,  FALSE,
7334     EL_EM_EXIT_OPEN,                    -1, -1
7335   },
7336
7337   {
7338     Xpause,                             FALSE,  FALSE,
7339     EL_EMPTY,                           -1, -1
7340   },
7341
7342   {
7343     Xwall_1,                            TRUE,   FALSE,
7344     EL_WALL,                            -1, -1
7345   },
7346   {
7347     Xwall_2,                            TRUE,   FALSE,
7348     EL_EMC_WALL_14,                     -1, -1
7349   },
7350   {
7351     Xwall_3,                            TRUE,   FALSE,
7352     EL_EMC_WALL_15,                     -1, -1
7353   },
7354   {
7355     Xwall_4,                            TRUE,   FALSE,
7356     EL_EMC_WALL_16,                     -1, -1
7357   },
7358
7359   {
7360     Xroundwall_1,                       TRUE,   FALSE,
7361     EL_WALL_SLIPPERY,                   -1, -1
7362   },
7363   {
7364     Xroundwall_2,                       TRUE,   FALSE,
7365     EL_EMC_WALL_SLIPPERY_2,             -1, -1
7366   },
7367   {
7368     Xroundwall_3,                       TRUE,   FALSE,
7369     EL_EMC_WALL_SLIPPERY_3,             -1, -1
7370   },
7371   {
7372     Xroundwall_4,                       TRUE,   FALSE,
7373     EL_EMC_WALL_SLIPPERY_4,             -1, -1
7374   },
7375
7376   {
7377     Xsteel_1,                           TRUE,   FALSE,
7378     EL_STEELWALL,                       -1, -1
7379   },
7380   {
7381     Xsteel_2,                           TRUE,   FALSE,
7382     EL_EMC_STEELWALL_2,                 -1, -1
7383   },
7384   {
7385     Xsteel_3,                           TRUE,   FALSE,
7386     EL_EMC_STEELWALL_3,                 -1, -1
7387   },
7388   {
7389     Xsteel_4,                           TRUE,   FALSE,
7390     EL_EMC_STEELWALL_4,                 -1, -1
7391   },
7392
7393   {
7394     Xdecor_1,                           TRUE,   FALSE,
7395     EL_EMC_WALL_8,                      -1, -1
7396   },
7397   {
7398     Xdecor_2,                           TRUE,   FALSE,
7399     EL_EMC_WALL_6,                      -1, -1
7400   },
7401   {
7402     Xdecor_3,                           TRUE,   FALSE,
7403     EL_EMC_WALL_4,                      -1, -1
7404   },
7405   {
7406     Xdecor_4,                           TRUE,   FALSE,
7407     EL_EMC_WALL_7,                      -1, -1
7408   },
7409   {
7410     Xdecor_5,                           TRUE,   FALSE,
7411     EL_EMC_WALL_5,                      -1, -1
7412   },
7413   {
7414     Xdecor_6,                           TRUE,   FALSE,
7415     EL_EMC_WALL_9,                      -1, -1
7416   },
7417   {
7418     Xdecor_7,                           TRUE,   FALSE,
7419     EL_EMC_WALL_10,                     -1, -1
7420   },
7421   {
7422     Xdecor_8,                           TRUE,   FALSE,
7423     EL_EMC_WALL_1,                      -1, -1
7424   },
7425   {
7426     Xdecor_9,                           TRUE,   FALSE,
7427     EL_EMC_WALL_2,                      -1, -1
7428   },
7429   {
7430     Xdecor_10,                          TRUE,   FALSE,
7431     EL_EMC_WALL_3,                      -1, -1
7432   },
7433   {
7434     Xdecor_11,                          TRUE,   FALSE,
7435     EL_EMC_WALL_11,                     -1, -1
7436   },
7437   {
7438     Xdecor_12,                          TRUE,   FALSE,
7439     EL_EMC_WALL_12,                     -1, -1
7440   },
7441
7442   {
7443     Xalpha_0,                           TRUE,   FALSE,
7444     EL_CHAR('0'),                       -1, -1
7445   },
7446   {
7447     Xalpha_1,                           TRUE,   FALSE,
7448     EL_CHAR('1'),                       -1, -1
7449   },
7450   {
7451     Xalpha_2,                           TRUE,   FALSE,
7452     EL_CHAR('2'),                       -1, -1
7453   },
7454   {
7455     Xalpha_3,                           TRUE,   FALSE,
7456     EL_CHAR('3'),                       -1, -1
7457   },
7458   {
7459     Xalpha_4,                           TRUE,   FALSE,
7460     EL_CHAR('4'),                       -1, -1
7461   },
7462   {
7463     Xalpha_5,                           TRUE,   FALSE,
7464     EL_CHAR('5'),                       -1, -1
7465   },
7466   {
7467     Xalpha_6,                           TRUE,   FALSE,
7468     EL_CHAR('6'),                       -1, -1
7469   },
7470   {
7471     Xalpha_7,                           TRUE,   FALSE,
7472     EL_CHAR('7'),                       -1, -1
7473   },
7474   {
7475     Xalpha_8,                           TRUE,   FALSE,
7476     EL_CHAR('8'),                       -1, -1
7477   },
7478   {
7479     Xalpha_9,                           TRUE,   FALSE,
7480     EL_CHAR('9'),                       -1, -1
7481   },
7482   {
7483     Xalpha_excla,                       TRUE,   FALSE,
7484     EL_CHAR('!'),                       -1, -1
7485   },
7486   {
7487     Xalpha_apost,                       TRUE,   FALSE,
7488     EL_CHAR('\''),                      -1, -1
7489   },
7490   {
7491     Xalpha_comma,                       TRUE,   FALSE,
7492     EL_CHAR(','),                       -1, -1
7493   },
7494   {
7495     Xalpha_minus,                       TRUE,   FALSE,
7496     EL_CHAR('-'),                       -1, -1
7497   },
7498   {
7499     Xalpha_perio,                       TRUE,   FALSE,
7500     EL_CHAR('.'),                       -1, -1
7501   },
7502   {
7503     Xalpha_colon,                       TRUE,   FALSE,
7504     EL_CHAR(':'),                       -1, -1
7505   },
7506   {
7507     Xalpha_quest,                       TRUE,   FALSE,
7508     EL_CHAR('?'),                       -1, -1
7509   },
7510   {
7511     Xalpha_a,                           TRUE,   FALSE,
7512     EL_CHAR('A'),                       -1, -1
7513   },
7514   {
7515     Xalpha_b,                           TRUE,   FALSE,
7516     EL_CHAR('B'),                       -1, -1
7517   },
7518   {
7519     Xalpha_c,                           TRUE,   FALSE,
7520     EL_CHAR('C'),                       -1, -1
7521   },
7522   {
7523     Xalpha_d,                           TRUE,   FALSE,
7524     EL_CHAR('D'),                       -1, -1
7525   },
7526   {
7527     Xalpha_e,                           TRUE,   FALSE,
7528     EL_CHAR('E'),                       -1, -1
7529   },
7530   {
7531     Xalpha_f,                           TRUE,   FALSE,
7532     EL_CHAR('F'),                       -1, -1
7533   },
7534   {
7535     Xalpha_g,                           TRUE,   FALSE,
7536     EL_CHAR('G'),                       -1, -1
7537   },
7538   {
7539     Xalpha_h,                           TRUE,   FALSE,
7540     EL_CHAR('H'),                       -1, -1
7541   },
7542   {
7543     Xalpha_i,                           TRUE,   FALSE,
7544     EL_CHAR('I'),                       -1, -1
7545   },
7546   {
7547     Xalpha_j,                           TRUE,   FALSE,
7548     EL_CHAR('J'),                       -1, -1
7549   },
7550   {
7551     Xalpha_k,                           TRUE,   FALSE,
7552     EL_CHAR('K'),                       -1, -1
7553   },
7554   {
7555     Xalpha_l,                           TRUE,   FALSE,
7556     EL_CHAR('L'),                       -1, -1
7557   },
7558   {
7559     Xalpha_m,                           TRUE,   FALSE,
7560     EL_CHAR('M'),                       -1, -1
7561   },
7562   {
7563     Xalpha_n,                           TRUE,   FALSE,
7564     EL_CHAR('N'),                       -1, -1
7565   },
7566   {
7567     Xalpha_o,                           TRUE,   FALSE,
7568     EL_CHAR('O'),                       -1, -1
7569   },
7570   {
7571     Xalpha_p,                           TRUE,   FALSE,
7572     EL_CHAR('P'),                       -1, -1
7573   },
7574   {
7575     Xalpha_q,                           TRUE,   FALSE,
7576     EL_CHAR('Q'),                       -1, -1
7577   },
7578   {
7579     Xalpha_r,                           TRUE,   FALSE,
7580     EL_CHAR('R'),                       -1, -1
7581   },
7582   {
7583     Xalpha_s,                           TRUE,   FALSE,
7584     EL_CHAR('S'),                       -1, -1
7585   },
7586   {
7587     Xalpha_t,                           TRUE,   FALSE,
7588     EL_CHAR('T'),                       -1, -1
7589   },
7590   {
7591     Xalpha_u,                           TRUE,   FALSE,
7592     EL_CHAR('U'),                       -1, -1
7593   },
7594   {
7595     Xalpha_v,                           TRUE,   FALSE,
7596     EL_CHAR('V'),                       -1, -1
7597   },
7598   {
7599     Xalpha_w,                           TRUE,   FALSE,
7600     EL_CHAR('W'),                       -1, -1
7601   },
7602   {
7603     Xalpha_x,                           TRUE,   FALSE,
7604     EL_CHAR('X'),                       -1, -1
7605   },
7606   {
7607     Xalpha_y,                           TRUE,   FALSE,
7608     EL_CHAR('Y'),                       -1, -1
7609   },
7610   {
7611     Xalpha_z,                           TRUE,   FALSE,
7612     EL_CHAR('Z'),                       -1, -1
7613   },
7614   {
7615     Xalpha_arrow_e,                     TRUE,   FALSE,
7616     EL_CHAR('>'),                       -1, -1
7617   },
7618   {
7619     Xalpha_arrow_w,                     TRUE,   FALSE,
7620     EL_CHAR('<'),                       -1, -1
7621   },
7622   {
7623     Xalpha_copyr,                       TRUE,   FALSE,
7624     EL_CHAR(CHAR_BYTE_COPYRIGHT),       -1, -1
7625   },
7626
7627   {
7628     Ykey_1_blank,                       FALSE,  FALSE,
7629     EL_EM_KEY_1,                        ACTION_COLLECTING, -1
7630   },
7631   {
7632     Ykey_2_blank,                       FALSE,  FALSE,
7633     EL_EM_KEY_2,                        ACTION_COLLECTING, -1
7634   },
7635   {
7636     Ykey_3_blank,                       FALSE,  FALSE,
7637     EL_EM_KEY_3,                        ACTION_COLLECTING, -1
7638   },
7639   {
7640     Ykey_4_blank,                       FALSE,  FALSE,
7641     EL_EM_KEY_4,                        ACTION_COLLECTING, -1
7642   },
7643   {
7644     Ykey_5_blank,                       FALSE,  FALSE,
7645     EL_EMC_KEY_5,                       ACTION_COLLECTING, -1
7646   },
7647   {
7648     Ykey_6_blank,                       FALSE,  FALSE,
7649     EL_EMC_KEY_6,                       ACTION_COLLECTING, -1
7650   },
7651   {
7652     Ykey_7_blank,                       FALSE,  FALSE,
7653     EL_EMC_KEY_7,                       ACTION_COLLECTING, -1
7654   },
7655   {
7656     Ykey_8_blank,                       FALSE,  FALSE,
7657     EL_EMC_KEY_8,                       ACTION_COLLECTING, -1
7658   },
7659   {
7660     Ylenses_blank,                      FALSE,  FALSE,
7661     EL_EMC_LENSES,                      ACTION_COLLECTING, -1
7662   },
7663   {
7664     Ymagnify_blank,                     FALSE,  FALSE,
7665     EL_EMC_MAGNIFIER,                   ACTION_COLLECTING, -1
7666   },
7667   {
7668     Ygrass_blank,                       FALSE,  FALSE,
7669     EL_EMC_GRASS,                       ACTION_SNAPPING, -1
7670   },
7671   {
7672     Ydirt_blank,                        FALSE,  FALSE,
7673     EL_SAND,                            ACTION_SNAPPING, -1
7674   },
7675
7676   {
7677     -1,                                 FALSE,  FALSE,
7678     -1,                                 -1, -1
7679   }
7680 };
7681
7682 static struct Mapping_EM_to_RND_player
7683 {
7684   int action_em;
7685   int player_nr;
7686
7687   int element_rnd;
7688   int action;
7689   int direction;
7690 }
7691 em_player_mapping_list[MAX_PLAYERS * PLY_MAX + 1] =
7692 {
7693   {
7694     PLY_walk_n,                         0,
7695     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_UP,
7696   },
7697   {
7698     PLY_walk_e,                         0,
7699     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_RIGHT,
7700   },
7701   {
7702     PLY_walk_s,                         0,
7703     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_DOWN,
7704   },
7705   {
7706     PLY_walk_w,                         0,
7707     EL_PLAYER_1,                        ACTION_MOVING, MV_BIT_LEFT,
7708   },
7709   {
7710     PLY_push_n,                         0,
7711     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_UP,
7712   },
7713   {
7714     PLY_push_e,                         0,
7715     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_RIGHT,
7716   },
7717   {
7718     PLY_push_s,                         0,
7719     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_DOWN,
7720   },
7721   {
7722     PLY_push_w,                         0,
7723     EL_PLAYER_1,                        ACTION_PUSHING, MV_BIT_LEFT,
7724   },
7725   {
7726     PLY_shoot_n,                        0,
7727     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_UP,
7728   },
7729   {
7730     PLY_shoot_e,                        0,
7731     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7732   },
7733   {
7734     PLY_shoot_s,                        0,
7735     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_DOWN,
7736   },
7737   {
7738     PLY_shoot_w,                        0,
7739     EL_PLAYER_1,                        ACTION_SNAPPING, MV_BIT_LEFT,
7740   },
7741   {
7742     PLY_walk_n,                         1,
7743     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_UP,
7744   },
7745   {
7746     PLY_walk_e,                         1,
7747     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_RIGHT,
7748   },
7749   {
7750     PLY_walk_s,                         1,
7751     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_DOWN,
7752   },
7753   {
7754     PLY_walk_w,                         1,
7755     EL_PLAYER_2,                        ACTION_MOVING, MV_BIT_LEFT,
7756   },
7757   {
7758     PLY_push_n,                         1,
7759     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_UP,
7760   },
7761   {
7762     PLY_push_e,                         1,
7763     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_RIGHT,
7764   },
7765   {
7766     PLY_push_s,                         1,
7767     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_DOWN,
7768   },
7769   {
7770     PLY_push_w,                         1,
7771     EL_PLAYER_2,                        ACTION_PUSHING, MV_BIT_LEFT,
7772   },
7773   {
7774     PLY_shoot_n,                        1,
7775     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_UP,
7776   },
7777   {
7778     PLY_shoot_e,                        1,
7779     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7780   },
7781   {
7782     PLY_shoot_s,                        1,
7783     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_DOWN,
7784   },
7785   {
7786     PLY_shoot_w,                        1,
7787     EL_PLAYER_2,                        ACTION_SNAPPING, MV_BIT_LEFT,
7788   },
7789   {
7790     PLY_still,                          0,
7791     EL_PLAYER_1,                        ACTION_DEFAULT, -1,
7792   },
7793   {
7794     PLY_still,                          1,
7795     EL_PLAYER_2,                        ACTION_DEFAULT, -1,
7796   },
7797   {
7798     PLY_walk_n,                         2,
7799     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_UP,
7800   },
7801   {
7802     PLY_walk_e,                         2,
7803     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_RIGHT,
7804   },
7805   {
7806     PLY_walk_s,                         2,
7807     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_DOWN,
7808   },
7809   {
7810     PLY_walk_w,                         2,
7811     EL_PLAYER_3,                        ACTION_MOVING, MV_BIT_LEFT,
7812   },
7813   {
7814     PLY_push_n,                         2,
7815     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_UP,
7816   },
7817   {
7818     PLY_push_e,                         2,
7819     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_RIGHT,
7820   },
7821   {
7822     PLY_push_s,                         2,
7823     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_DOWN,
7824   },
7825   {
7826     PLY_push_w,                         2,
7827     EL_PLAYER_3,                        ACTION_PUSHING, MV_BIT_LEFT,
7828   },
7829   {
7830     PLY_shoot_n,                        2,
7831     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_UP,
7832   },
7833   {
7834     PLY_shoot_e,                        2,
7835     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7836   },
7837   {
7838     PLY_shoot_s,                        2,
7839     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_DOWN,
7840   },
7841   {
7842     PLY_shoot_w,                        2,
7843     EL_PLAYER_3,                        ACTION_SNAPPING, MV_BIT_LEFT,
7844   },
7845   {
7846     PLY_walk_n,                         3,
7847     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_UP,
7848   },
7849   {
7850     PLY_walk_e,                         3,
7851     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_RIGHT,
7852   },
7853   {
7854     PLY_walk_s,                         3,
7855     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_DOWN,
7856   },
7857   {
7858     PLY_walk_w,                         3,
7859     EL_PLAYER_4,                        ACTION_MOVING, MV_BIT_LEFT,
7860   },
7861   {
7862     PLY_push_n,                         3,
7863     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_UP,
7864   },
7865   {
7866     PLY_push_e,                         3,
7867     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_RIGHT,
7868   },
7869   {
7870     PLY_push_s,                         3,
7871     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_DOWN,
7872   },
7873   {
7874     PLY_push_w,                         3,
7875     EL_PLAYER_4,                        ACTION_PUSHING, MV_BIT_LEFT,
7876   },
7877   {
7878     PLY_shoot_n,                        3,
7879     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_UP,
7880   },
7881   {
7882     PLY_shoot_e,                        3,
7883     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_RIGHT,
7884   },
7885   {
7886     PLY_shoot_s,                        3,
7887     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_DOWN,
7888   },
7889   {
7890     PLY_shoot_w,                        3,
7891     EL_PLAYER_4,                        ACTION_SNAPPING, MV_BIT_LEFT,
7892   },
7893   {
7894     PLY_still,                          2,
7895     EL_PLAYER_3,                        ACTION_DEFAULT, -1,
7896   },
7897   {
7898     PLY_still,                          3,
7899     EL_PLAYER_4,                        ACTION_DEFAULT, -1,
7900   },
7901
7902   {
7903     -1,                                 -1,
7904     -1,                                 -1, -1
7905   }
7906 };
7907
7908 int map_element_RND_to_EM_cave(int element_rnd)
7909 {
7910   static unsigned short mapping_RND_to_EM[NUM_FILE_ELEMENTS];
7911   static boolean mapping_initialized = FALSE;
7912
7913   if (!mapping_initialized)
7914   {
7915     int i;
7916
7917     // return "Xalpha_quest" for all undefined elements in mapping array
7918     for (i = 0; i < NUM_FILE_ELEMENTS; i++)
7919       mapping_RND_to_EM[i] = Xalpha_quest;
7920
7921     for (i = 0; em_object_mapping_list[i].element_em != -1; i++)
7922       if (em_object_mapping_list[i].is_rnd_to_em_mapping)
7923         mapping_RND_to_EM[em_object_mapping_list[i].element_rnd] =
7924           em_object_mapping_list[i].element_em;
7925
7926     mapping_initialized = TRUE;
7927   }
7928
7929   if (element_rnd < 0 || element_rnd >= NUM_FILE_ELEMENTS)
7930   {
7931     Warn("invalid RND level element %d", element_rnd);
7932
7933     return EL_UNKNOWN;
7934   }
7935
7936   return map_em_element_X_to_C(mapping_RND_to_EM[element_rnd]);
7937 }
7938
7939 int map_element_EM_to_RND_cave(int element_em_cave)
7940 {
7941   static unsigned short mapping_EM_to_RND[GAME_TILE_MAX];
7942   static boolean mapping_initialized = FALSE;
7943
7944   if (!mapping_initialized)
7945   {
7946     int i;
7947
7948     // return "EL_UNKNOWN" for all undefined elements in mapping array
7949     for (i = 0; i < GAME_TILE_MAX; i++)
7950       mapping_EM_to_RND[i] = EL_UNKNOWN;
7951
7952     for (i = 0; em_object_mapping_list[i].element_em != -1; i++)
7953       mapping_EM_to_RND[em_object_mapping_list[i].element_em] =
7954         em_object_mapping_list[i].element_rnd;
7955
7956     mapping_initialized = TRUE;
7957   }
7958
7959   if (element_em_cave < 0 || element_em_cave >= CAVE_TILE_MAX)
7960   {
7961     Warn("invalid EM cave element %d", element_em_cave);
7962
7963     return EL_UNKNOWN;
7964   }
7965
7966   return mapping_EM_to_RND[map_em_element_C_to_X(element_em_cave)];
7967 }
7968
7969 int map_element_EM_to_RND_game(int element_em_game)
7970 {
7971   static unsigned short mapping_EM_to_RND[GAME_TILE_MAX];
7972   static boolean mapping_initialized = FALSE;
7973
7974   if (!mapping_initialized)
7975   {
7976     int i;
7977
7978     // return "EL_UNKNOWN" for all undefined elements in mapping array
7979     for (i = 0; i < GAME_TILE_MAX; i++)
7980       mapping_EM_to_RND[i] = EL_UNKNOWN;
7981
7982     for (i = 0; em_object_mapping_list[i].element_em != -1; i++)
7983       mapping_EM_to_RND[em_object_mapping_list[i].element_em] =
7984         em_object_mapping_list[i].element_rnd;
7985
7986     mapping_initialized = TRUE;
7987   }
7988
7989   if (element_em_game < 0 || element_em_game >= GAME_TILE_MAX)
7990   {
7991     Warn("invalid EM game element %d", element_em_game);
7992
7993     return EL_UNKNOWN;
7994   }
7995
7996   return mapping_EM_to_RND[element_em_game];
7997 }
7998
7999 void map_android_clone_elements_RND_to_EM(struct LevelInfo *level)
8000 {
8001   struct LevelInfo_EM *level_em = level->native_em_level;
8002   struct CAVE *cav = level_em->cav;
8003   int i, j;
8004
8005   for (i = 0; i < GAME_TILE_MAX; i++)
8006     cav->android_array[i] = Cblank;
8007
8008   for (i = 0; i < level->num_android_clone_elements; i++)
8009   {
8010     int element_rnd = level->android_clone_element[i];
8011     int element_em_cave = map_element_RND_to_EM_cave(element_rnd);
8012
8013     for (j = 0; em_object_mapping_list[j].element_em != -1; j++)
8014       if (em_object_mapping_list[j].element_rnd == element_rnd)
8015         cav->android_array[em_object_mapping_list[j].element_em] =
8016           element_em_cave;
8017   }
8018 }
8019
8020 void map_android_clone_elements_EM_to_RND(struct LevelInfo *level)
8021 {
8022   struct LevelInfo_EM *level_em = level->native_em_level;
8023   struct CAVE *cav = level_em->cav;
8024   int i, j;
8025
8026   level->num_android_clone_elements = 0;
8027
8028   for (i = 0; i < GAME_TILE_MAX; i++)
8029   {
8030     int element_em_cave = cav->android_array[i];
8031     int element_rnd;
8032     boolean element_found = FALSE;
8033
8034     if (element_em_cave == Cblank)
8035       continue;
8036
8037     element_rnd = map_element_EM_to_RND_cave(element_em_cave);
8038
8039     for (j = 0; j < level->num_android_clone_elements; j++)
8040       if (level->android_clone_element[j] == element_rnd)
8041         element_found = TRUE;
8042
8043     if (!element_found)
8044     {
8045       level->android_clone_element[level->num_android_clone_elements++] =
8046         element_rnd;
8047
8048       if (level->num_android_clone_elements == MAX_ANDROID_ELEMENTS)
8049         break;
8050     }
8051   }
8052
8053   if (level->num_android_clone_elements == 0)
8054   {
8055     level->num_android_clone_elements = 1;
8056     level->android_clone_element[0] = EL_EMPTY;
8057   }
8058 }
8059
8060 int map_direction_RND_to_EM(int direction)
8061 {
8062   return (direction == MV_UP    ? 0 :
8063           direction == MV_RIGHT ? 1 :
8064           direction == MV_DOWN  ? 2 :
8065           direction == MV_LEFT  ? 3 :
8066           -1);
8067 }
8068
8069 int map_direction_EM_to_RND(int direction)
8070 {
8071   return (direction == 0 ? MV_UP    :
8072           direction == 1 ? MV_RIGHT :
8073           direction == 2 ? MV_DOWN  :
8074           direction == 3 ? MV_LEFT  :
8075           MV_NONE);
8076 }
8077
8078 int map_element_RND_to_SP(int element_rnd)
8079 {
8080   int element_sp = 0x20;        // map unknown elements to yellow "hardware"
8081
8082   if (element_rnd >= EL_SP_START &&
8083       element_rnd <= EL_SP_END)
8084     element_sp = element_rnd - EL_SP_START;
8085   else if (element_rnd == EL_EMPTY_SPACE)
8086     element_sp = 0x00;
8087   else if (element_rnd == EL_INVISIBLE_WALL)
8088     element_sp = 0x28;
8089
8090   return element_sp;
8091 }
8092
8093 int map_element_SP_to_RND(int element_sp)
8094 {
8095   int element_rnd = EL_UNKNOWN;
8096
8097   if (element_sp >= 0x00 &&
8098       element_sp <= 0x27)
8099     element_rnd = EL_SP_START + element_sp;
8100   else if (element_sp == 0x28)
8101     element_rnd = EL_INVISIBLE_WALL;
8102
8103   return element_rnd;
8104 }
8105
8106 int map_action_SP_to_RND(int action_sp)
8107 {
8108   switch (action_sp)
8109   {
8110     case actActive:             return ACTION_ACTIVE;
8111     case actImpact:             return ACTION_IMPACT;
8112     case actExploding:          return ACTION_EXPLODING;
8113     case actDigging:            return ACTION_DIGGING;
8114     case actSnapping:           return ACTION_SNAPPING;
8115     case actCollecting:         return ACTION_COLLECTING;
8116     case actPassing:            return ACTION_PASSING;
8117     case actPushing:            return ACTION_PUSHING;
8118     case actDropping:           return ACTION_DROPPING;
8119
8120     default:                    return ACTION_DEFAULT;
8121   }
8122 }
8123
8124 int map_element_RND_to_MM(int element_rnd)
8125 {
8126   return (element_rnd >= EL_MM_START_1 &&
8127           element_rnd <= EL_MM_END_1 ?
8128           EL_MM_START_1_NATIVE + element_rnd - EL_MM_START_1 :
8129
8130           element_rnd >= EL_MM_START_2 &&
8131           element_rnd <= EL_MM_END_2 ?
8132           EL_MM_START_2_NATIVE + element_rnd - EL_MM_START_2 :
8133
8134           element_rnd >= EL_MM_START_3 &&
8135           element_rnd <= EL_MM_END_3 ?
8136           EL_MM_START_3_NATIVE + element_rnd - EL_MM_START_3 :
8137
8138           element_rnd >= EL_CHAR_START &&
8139           element_rnd <= EL_CHAR_END ?
8140           EL_MM_CHAR_START_NATIVE + element_rnd - EL_CHAR_START :
8141
8142           element_rnd >= EL_MM_RUNTIME_START &&
8143           element_rnd <= EL_MM_RUNTIME_END ?
8144           EL_MM_RUNTIME_START_NATIVE + element_rnd - EL_MM_RUNTIME_START :
8145
8146           EL_MM_EMPTY_NATIVE);
8147 }
8148
8149 int map_element_MM_to_RND(int element_mm)
8150 {
8151   return (element_mm == EL_MM_EMPTY_NATIVE ||
8152           element_mm == EL_DF_EMPTY_NATIVE ?
8153           EL_EMPTY :
8154
8155           element_mm >= EL_MM_START_1_NATIVE &&
8156           element_mm <= EL_MM_END_1_NATIVE ?
8157           EL_MM_START_1 + element_mm - EL_MM_START_1_NATIVE :
8158
8159           element_mm >= EL_MM_START_2_NATIVE &&
8160           element_mm <= EL_MM_END_2_NATIVE ?
8161           EL_MM_START_2 + element_mm - EL_MM_START_2_NATIVE :
8162
8163           element_mm >= EL_MM_START_3_NATIVE &&
8164           element_mm <= EL_MM_END_3_NATIVE ?
8165           EL_MM_START_3 + element_mm - EL_MM_START_3_NATIVE :
8166
8167           element_mm >= EL_MM_CHAR_START_NATIVE &&
8168           element_mm <= EL_MM_CHAR_END_NATIVE ?
8169           EL_CHAR_START + element_mm - EL_MM_CHAR_START_NATIVE :
8170
8171           element_mm >= EL_MM_RUNTIME_START_NATIVE &&
8172           element_mm <= EL_MM_RUNTIME_END_NATIVE ?
8173           EL_MM_RUNTIME_START + element_mm - EL_MM_RUNTIME_START_NATIVE :
8174
8175           EL_EMPTY);
8176 }
8177
8178 int map_action_MM_to_RND(int action_mm)
8179 {
8180   // all MM actions are defined to exactly match their RND counterparts
8181   return action_mm;
8182 }
8183
8184 int map_sound_MM_to_RND(int sound_mm)
8185 {
8186   switch (sound_mm)
8187   {
8188     case SND_MM_GAME_LEVELTIME_CHARGING:
8189       return SND_GAME_LEVELTIME_CHARGING;
8190
8191     case SND_MM_GAME_HEALTH_CHARGING:
8192       return SND_GAME_HEALTH_CHARGING;
8193
8194     default:
8195       return SND_UNDEFINED;
8196   }
8197 }
8198
8199 int map_mm_wall_element(int element)
8200 {
8201   return (element >= EL_MM_STEEL_WALL_START &&
8202           element <= EL_MM_STEEL_WALL_END ?
8203           EL_MM_STEEL_WALL :
8204
8205           element >= EL_MM_WOODEN_WALL_START &&
8206           element <= EL_MM_WOODEN_WALL_END ?
8207           EL_MM_WOODEN_WALL :
8208
8209           element >= EL_MM_ICE_WALL_START &&
8210           element <= EL_MM_ICE_WALL_END ?
8211           EL_MM_ICE_WALL :
8212
8213           element >= EL_MM_AMOEBA_WALL_START &&
8214           element <= EL_MM_AMOEBA_WALL_END ?
8215           EL_MM_AMOEBA_WALL :
8216
8217           element >= EL_DF_STEEL_WALL_START &&
8218           element <= EL_DF_STEEL_WALL_END ?
8219           EL_DF_STEEL_WALL :
8220
8221           element >= EL_DF_WOODEN_WALL_START &&
8222           element <= EL_DF_WOODEN_WALL_END ?
8223           EL_DF_WOODEN_WALL :
8224
8225           element);
8226 }
8227
8228 int map_mm_wall_element_editor(int element)
8229 {
8230   switch (element)
8231   {
8232     case EL_MM_STEEL_WALL:      return EL_MM_STEEL_WALL_START;
8233     case EL_MM_WOODEN_WALL:     return EL_MM_WOODEN_WALL_START;
8234     case EL_MM_ICE_WALL:        return EL_MM_ICE_WALL_START;
8235     case EL_MM_AMOEBA_WALL:     return EL_MM_AMOEBA_WALL_START;
8236     case EL_DF_STEEL_WALL:      return EL_DF_STEEL_WALL_START;
8237     case EL_DF_WOODEN_WALL:     return EL_DF_WOODEN_WALL_START;
8238
8239     default:                    return element;
8240   }
8241 }
8242
8243 int get_next_element(int element)
8244 {
8245   switch (element)
8246   {
8247     case EL_QUICKSAND_FILLING:          return EL_QUICKSAND_FULL;
8248     case EL_QUICKSAND_EMPTYING:         return EL_QUICKSAND_EMPTY;
8249     case EL_QUICKSAND_FAST_FILLING:     return EL_QUICKSAND_FAST_FULL;
8250     case EL_QUICKSAND_FAST_EMPTYING:    return EL_QUICKSAND_FAST_EMPTY;
8251     case EL_MAGIC_WALL_FILLING:         return EL_MAGIC_WALL_FULL;
8252     case EL_MAGIC_WALL_EMPTYING:        return EL_MAGIC_WALL_ACTIVE;
8253     case EL_BD_MAGIC_WALL_FILLING:      return EL_BD_MAGIC_WALL_FULL;
8254     case EL_BD_MAGIC_WALL_EMPTYING:     return EL_BD_MAGIC_WALL_ACTIVE;
8255     case EL_DC_MAGIC_WALL_FILLING:      return EL_DC_MAGIC_WALL_FULL;
8256     case EL_DC_MAGIC_WALL_EMPTYING:     return EL_DC_MAGIC_WALL_ACTIVE;
8257     case EL_AMOEBA_DROPPING:            return EL_AMOEBA_WET;
8258
8259     default:                            return element;
8260   }
8261 }
8262
8263 int el2img_mm(int element_mm)
8264 {
8265   return el2img(map_element_MM_to_RND(element_mm));
8266 }
8267
8268 int el_act2img_mm(int element_mm, int action)
8269 {
8270   return el_act2img(map_element_MM_to_RND(element_mm), action);
8271 }
8272
8273 int el_act_dir2img(int element, int action, int direction)
8274 {
8275   element = GFX_ELEMENT(element);
8276   direction = MV_DIR_TO_BIT(direction); // default: MV_NONE => MV_DOWN
8277
8278   // direction_graphic[][] == graphic[] for undefined direction graphics
8279   return element_info[element].direction_graphic[action][direction];
8280 }
8281
8282 static int el_act_dir2crm(int element, int action, int direction)
8283 {
8284   element = GFX_ELEMENT(element);
8285   direction = MV_DIR_TO_BIT(direction); // default: MV_NONE => MV_DOWN
8286
8287   // direction_graphic[][] == graphic[] for undefined direction graphics
8288   return element_info[element].direction_crumbled[action][direction];
8289 }
8290
8291 int el_act2img(int element, int action)
8292 {
8293   element = GFX_ELEMENT(element);
8294
8295   return element_info[element].graphic[action];
8296 }
8297
8298 int el_act2crm(int element, int action)
8299 {
8300   element = GFX_ELEMENT(element);
8301
8302   return element_info[element].crumbled[action];
8303 }
8304
8305 int el_dir2img(int element, int direction)
8306 {
8307   element = GFX_ELEMENT(element);
8308
8309   return el_act_dir2img(element, ACTION_DEFAULT, direction);
8310 }
8311
8312 int el2baseimg(int element)
8313 {
8314   return element_info[element].graphic[ACTION_DEFAULT];
8315 }
8316
8317 int el2img(int element)
8318 {
8319   element = GFX_ELEMENT(element);
8320
8321   return element_info[element].graphic[ACTION_DEFAULT];
8322 }
8323
8324 int el2edimg(int element)
8325 {
8326   element = GFX_ELEMENT(element);
8327
8328   return element_info[element].special_graphic[GFX_SPECIAL_ARG_EDITOR];
8329 }
8330
8331 int el2preimg(int element)
8332 {
8333   element = GFX_ELEMENT(element);
8334
8335   return element_info[element].special_graphic[GFX_SPECIAL_ARG_PREVIEW];
8336 }
8337
8338 int el2panelimg(int element)
8339 {
8340   element = GFX_ELEMENT(element);
8341
8342   return element_info[element].special_graphic[GFX_SPECIAL_ARG_PANEL];
8343 }
8344
8345 int font2baseimg(int font_nr)
8346 {
8347   return font_info[font_nr].special_graphic[GFX_SPECIAL_ARG_DEFAULT];
8348 }
8349
8350 int getBeltNrFromBeltElement(int element)
8351 {
8352   return (element < EL_CONVEYOR_BELT_2_LEFT ? 0 :
8353           element < EL_CONVEYOR_BELT_3_LEFT ? 1 :
8354           element < EL_CONVEYOR_BELT_4_LEFT ? 2 : 3);
8355 }
8356
8357 int getBeltNrFromBeltActiveElement(int element)
8358 {
8359   return (element < EL_CONVEYOR_BELT_2_LEFT_ACTIVE ? 0 :
8360           element < EL_CONVEYOR_BELT_3_LEFT_ACTIVE ? 1 :
8361           element < EL_CONVEYOR_BELT_4_LEFT_ACTIVE ? 2 : 3);
8362 }
8363
8364 int getBeltNrFromBeltSwitchElement(int element)
8365 {
8366   return (element < EL_CONVEYOR_BELT_2_SWITCH_LEFT ? 0 :
8367           element < EL_CONVEYOR_BELT_3_SWITCH_LEFT ? 1 :
8368           element < EL_CONVEYOR_BELT_4_SWITCH_LEFT ? 2 : 3);
8369 }
8370
8371 int getBeltDirNrFromBeltElement(int element)
8372 {
8373   static int belt_base_element[4] =
8374   {
8375     EL_CONVEYOR_BELT_1_LEFT,
8376     EL_CONVEYOR_BELT_2_LEFT,
8377     EL_CONVEYOR_BELT_3_LEFT,
8378     EL_CONVEYOR_BELT_4_LEFT
8379   };
8380
8381   int belt_nr = getBeltNrFromBeltElement(element);
8382   int belt_dir_nr = element - belt_base_element[belt_nr];
8383
8384   return (belt_dir_nr % 3);
8385 }
8386
8387 int getBeltDirNrFromBeltSwitchElement(int element)
8388 {
8389   static int belt_base_element[4] =
8390   {
8391     EL_CONVEYOR_BELT_1_SWITCH_LEFT,
8392     EL_CONVEYOR_BELT_2_SWITCH_LEFT,
8393     EL_CONVEYOR_BELT_3_SWITCH_LEFT,
8394     EL_CONVEYOR_BELT_4_SWITCH_LEFT
8395   };
8396
8397   int belt_nr = getBeltNrFromBeltSwitchElement(element);
8398   int belt_dir_nr = element - belt_base_element[belt_nr];
8399
8400   return (belt_dir_nr % 3);
8401 }
8402
8403 int getBeltDirFromBeltElement(int element)
8404 {
8405   static int belt_move_dir[3] =
8406   {
8407     MV_LEFT,
8408     MV_NONE,
8409     MV_RIGHT
8410   };
8411
8412   int belt_dir_nr = getBeltDirNrFromBeltElement(element);
8413
8414   return belt_move_dir[belt_dir_nr];
8415 }
8416
8417 int getBeltDirFromBeltSwitchElement(int element)
8418 {
8419   static int belt_move_dir[3] =
8420   {
8421     MV_LEFT,
8422     MV_NONE,
8423     MV_RIGHT
8424   };
8425
8426   int belt_dir_nr = getBeltDirNrFromBeltSwitchElement(element);
8427
8428   return belt_move_dir[belt_dir_nr];
8429 }
8430
8431 int getBeltElementFromBeltNrAndBeltDirNr(int belt_nr, int belt_dir_nr)
8432 {
8433   static int belt_base_element[4] =
8434   {
8435     EL_CONVEYOR_BELT_1_LEFT,
8436     EL_CONVEYOR_BELT_2_LEFT,
8437     EL_CONVEYOR_BELT_3_LEFT,
8438     EL_CONVEYOR_BELT_4_LEFT
8439   };
8440
8441   return belt_base_element[belt_nr] + belt_dir_nr;
8442 }
8443
8444 int getBeltElementFromBeltNrAndBeltDir(int belt_nr, int belt_dir)
8445 {
8446   int belt_dir_nr = (belt_dir == MV_LEFT ? 0 : belt_dir == MV_RIGHT ? 2 : 1);
8447
8448   return getBeltElementFromBeltNrAndBeltDirNr(belt_nr, belt_dir_nr);
8449 }
8450
8451 int getBeltSwitchElementFromBeltNrAndBeltDirNr(int belt_nr, int belt_dir_nr)
8452 {
8453   static int belt_base_element[4] =
8454   {
8455     EL_CONVEYOR_BELT_1_SWITCH_LEFT,
8456     EL_CONVEYOR_BELT_2_SWITCH_LEFT,
8457     EL_CONVEYOR_BELT_3_SWITCH_LEFT,
8458     EL_CONVEYOR_BELT_4_SWITCH_LEFT
8459   };
8460
8461   return belt_base_element[belt_nr] + belt_dir_nr;
8462 }
8463
8464 int getBeltSwitchElementFromBeltNrAndBeltDir(int belt_nr, int belt_dir)
8465 {
8466   int belt_dir_nr = (belt_dir == MV_LEFT ? 0 : belt_dir == MV_RIGHT ? 2 : 1);
8467
8468   return getBeltSwitchElementFromBeltNrAndBeltDirNr(belt_nr, belt_dir_nr);
8469 }
8470
8471 boolean swapTiles_EM(boolean is_pre_emc_cave)
8472 {
8473   return is_pre_emc_cave && leveldir_current->use_emc_tiles;
8474 }
8475
8476 boolean getTeamMode_EM(void)
8477 {
8478   return game.team_mode || network_playing;
8479 }
8480
8481 boolean isActivePlayer_EM(int player_nr)
8482 {
8483   return stored_player[player_nr].active;
8484 }
8485
8486 unsigned int InitRND(int seed)
8487 {
8488   if (level.game_engine_type == GAME_ENGINE_TYPE_EM)
8489     return InitEngineRandom_EM(seed);
8490   else if (level.game_engine_type == GAME_ENGINE_TYPE_SP)
8491     return InitEngineRandom_SP(seed);
8492   else if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
8493     return InitEngineRandom_MM(seed);
8494   else
8495     return InitEngineRandom_RND(seed);
8496 }
8497
8498 static struct Mapping_EM_to_RND_object object_mapping[GAME_TILE_MAX];
8499 static struct Mapping_EM_to_RND_player player_mapping[MAX_PLAYERS][PLY_MAX];
8500
8501 static int get_effective_element_EM(int tile, int frame_em)
8502 {
8503   int element             = object_mapping[tile].element_rnd;
8504   int action              = object_mapping[tile].action;
8505   boolean is_backside     = object_mapping[tile].is_backside;
8506   boolean action_removing = (action == ACTION_DIGGING ||
8507                              action == ACTION_SNAPPING ||
8508                              action == ACTION_COLLECTING);
8509
8510   if (frame_em < 7)
8511   {
8512     switch (tile)
8513     {
8514       case Xsplash_e:
8515       case Xsplash_w:
8516         return (frame_em > 5 ? EL_EMPTY : element);
8517
8518       default:
8519         return element;
8520     }
8521   }
8522   else  // frame_em == 7
8523   {
8524     switch (tile)
8525     {
8526       case Xsplash_e:
8527       case Xsplash_w:
8528         return EL_EMPTY;
8529
8530       case Ynut_stone:
8531         return EL_EMERALD;
8532
8533       case Ydiamond_stone:
8534         return EL_ROCK;
8535
8536       case Xdrip_stretch:
8537       case Xdrip_stretchB:
8538       case Ydrip_1_s:
8539       case Ydrip_1_sB:
8540       case Yball_1:
8541       case Xball_2:
8542       case Yball_2:
8543       case Yball_blank:
8544       case Ykey_1_blank:
8545       case Ykey_2_blank:
8546       case Ykey_3_blank:
8547       case Ykey_4_blank:
8548       case Ykey_5_blank:
8549       case Ykey_6_blank:
8550       case Ykey_7_blank:
8551       case Ykey_8_blank:
8552       case Ylenses_blank:
8553       case Ymagnify_blank:
8554       case Ygrass_blank:
8555       case Ydirt_blank:
8556       case Xsand_stonein_1:
8557       case Xsand_stonein_2:
8558       case Xsand_stonein_3:
8559       case Xsand_stonein_4:
8560         return element;
8561
8562       default:
8563         return (is_backside || action_removing ? EL_EMPTY : element);
8564     }
8565   }
8566 }
8567
8568 static boolean check_linear_animation_EM(int tile)
8569 {
8570   switch (tile)
8571   {
8572     case Xsand_stonesand_1:
8573     case Xsand_stonesand_quickout_1:
8574     case Xsand_sandstone_1:
8575     case Xsand_stonein_1:
8576     case Xsand_stoneout_1:
8577     case Xboom_1:
8578     case Xdynamite_1:
8579     case Ybug_w_n:
8580     case Ybug_n_e:
8581     case Ybug_e_s:
8582     case Ybug_s_w:
8583     case Ybug_e_n:
8584     case Ybug_s_e:
8585     case Ybug_w_s:
8586     case Ybug_n_w:
8587     case Ytank_w_n:
8588     case Ytank_n_e:
8589     case Ytank_e_s:
8590     case Ytank_s_w:
8591     case Ytank_e_n:
8592     case Ytank_s_e:
8593     case Ytank_w_s:
8594     case Ytank_n_w:
8595     case Xsplash_e:
8596     case Xsplash_w:
8597     case Ynut_stone:
8598       return TRUE;
8599   }
8600
8601   return FALSE;
8602 }
8603
8604 static void set_crumbled_graphics_EM(struct GraphicInfo_EM *g_em,
8605                                      boolean has_crumbled_graphics,
8606                                      int crumbled, int sync_frame)
8607 {
8608   // if element can be crumbled, but certain action graphics are just empty
8609   // space (like instantly snapping sand to empty space in 1 frame), do not
8610   // treat these empty space graphics as crumbled graphics in EMC engine
8611   if (crumbled == IMG_EMPTY_SPACE)
8612     has_crumbled_graphics = FALSE;
8613
8614   if (has_crumbled_graphics)
8615   {
8616     struct GraphicInfo *g_crumbled = &graphic_info[crumbled];
8617     int frame_crumbled = getAnimationFrame(g_crumbled->anim_frames,
8618                                            g_crumbled->anim_delay,
8619                                            g_crumbled->anim_mode,
8620                                            g_crumbled->anim_start_frame,
8621                                            sync_frame);
8622
8623     getGraphicSource(crumbled, frame_crumbled, &g_em->crumbled_bitmap,
8624                      &g_em->crumbled_src_x, &g_em->crumbled_src_y);
8625
8626     g_em->crumbled_border_size = graphic_info[crumbled].border_size;
8627     g_em->crumbled_tile_size = graphic_info[crumbled].tile_size;
8628
8629     g_em->has_crumbled_graphics = TRUE;
8630   }
8631   else
8632   {
8633     g_em->crumbled_bitmap = NULL;
8634     g_em->crumbled_src_x = 0;
8635     g_em->crumbled_src_y = 0;
8636     g_em->crumbled_border_size = 0;
8637     g_em->crumbled_tile_size = 0;
8638
8639     g_em->has_crumbled_graphics = FALSE;
8640   }
8641 }
8642
8643 #if 0
8644 void ResetGfxAnimation_EM(int x, int y, int tile)
8645 {
8646   GfxFrame[x][y] = 0;
8647 }
8648 #endif
8649
8650 void SetGfxAnimation_EM(struct GraphicInfo_EM *g_em,
8651                         int tile, int frame_em, int x, int y)
8652 {
8653   int action = object_mapping[tile].action;
8654   int direction = object_mapping[tile].direction;
8655   int effective_element = get_effective_element_EM(tile, frame_em);
8656   int graphic = (direction == MV_NONE ?
8657                  el_act2img(effective_element, action) :
8658                  el_act_dir2img(effective_element, action, direction));
8659   struct GraphicInfo *g = &graphic_info[graphic];
8660   int sync_frame;
8661   boolean action_removing = (action == ACTION_DIGGING ||
8662                              action == ACTION_SNAPPING ||
8663                              action == ACTION_COLLECTING);
8664   boolean action_moving   = (action == ACTION_FALLING ||
8665                              action == ACTION_MOVING ||
8666                              action == ACTION_PUSHING ||
8667                              action == ACTION_EATING ||
8668                              action == ACTION_FILLING ||
8669                              action == ACTION_EMPTYING);
8670   boolean action_falling  = (action == ACTION_FALLING ||
8671                              action == ACTION_FILLING ||
8672                              action == ACTION_EMPTYING);
8673
8674   // special case: graphic uses "2nd movement tile" and has defined
8675   // 7 frames for movement animation (or less) => use default graphic
8676   // for last (8th) frame which ends the movement animation
8677   if (g->double_movement && g->anim_frames < 8 && frame_em == 7)
8678   {
8679     action = ACTION_DEFAULT;    // (keep action_* unchanged for now)
8680     graphic = (direction == MV_NONE ?
8681                el_act2img(effective_element, action) :
8682                el_act_dir2img(effective_element, action, direction));
8683
8684     g = &graphic_info[graphic];
8685   }
8686
8687   if ((action_removing || check_linear_animation_EM(tile)) && frame_em == 0)
8688   {
8689     GfxFrame[x][y] = 0;
8690   }
8691   else if (action_moving)
8692   {
8693     boolean is_backside = object_mapping[tile].is_backside;
8694
8695     if (is_backside)
8696     {
8697       int direction = object_mapping[tile].direction;
8698       int move_dir = (action_falling ? MV_DOWN : direction);
8699
8700       GfxFrame[x][y]++;
8701
8702 #if 1
8703       // !!! TEST !!! NEW !!! DOES NOT WORK RIGHT YET !!!
8704       if (g->double_movement && frame_em == 0)
8705         GfxFrame[x][y] = 0;
8706 #endif
8707
8708       if (move_dir == MV_LEFT)
8709         GfxFrame[x - 1][y] = GfxFrame[x][y];
8710       else if (move_dir == MV_RIGHT)
8711         GfxFrame[x + 1][y] = GfxFrame[x][y];
8712       else if (move_dir == MV_UP)
8713         GfxFrame[x][y - 1] = GfxFrame[x][y];
8714       else if (move_dir == MV_DOWN)
8715         GfxFrame[x][y + 1] = GfxFrame[x][y];
8716     }
8717   }
8718   else
8719   {
8720     GfxFrame[x][y]++;
8721
8722     // special case: animation for Xsand_stonesand_quickout_1/2 twice as fast
8723     if (tile == Xsand_stonesand_quickout_1 ||
8724         tile == Xsand_stonesand_quickout_2)
8725       GfxFrame[x][y]++;
8726   }
8727
8728   if (graphic_info[graphic].anim_global_sync)
8729     sync_frame = FrameCounter;
8730   else if (graphic_info[graphic].anim_global_anim_sync)
8731     sync_frame = getGlobalAnimSyncFrame();
8732   else if (IN_FIELD(x, y, MAX_LEV_FIELDX, MAX_LEV_FIELDY))
8733     sync_frame = GfxFrame[x][y];
8734   else
8735     sync_frame = 0;     // playfield border (pseudo steel)
8736
8737   SetRandomAnimationValue(x, y);
8738
8739   int frame = getAnimationFrame(g->anim_frames,
8740                                 g->anim_delay,
8741                                 g->anim_mode,
8742                                 g->anim_start_frame,
8743                                 sync_frame);
8744
8745   g_em->unique_identifier =
8746     (graphic << 16) | ((frame % 8) << 12) | (g_em->width << 6) | g_em->height;
8747 }
8748
8749 void getGraphicSourceObjectExt_EM(struct GraphicInfo_EM *g_em,
8750                                   int tile, int frame_em, int x, int y)
8751 {
8752   int action = object_mapping[tile].action;
8753   int direction = object_mapping[tile].direction;
8754   boolean is_backside = object_mapping[tile].is_backside;
8755   int effective_element = get_effective_element_EM(tile, frame_em);
8756   int effective_action = action;
8757   int graphic = (direction == MV_NONE ?
8758                  el_act2img(effective_element, effective_action) :
8759                  el_act_dir2img(effective_element, effective_action,
8760                                 direction));
8761   int crumbled = (direction == MV_NONE ?
8762                   el_act2crm(effective_element, effective_action) :
8763                   el_act_dir2crm(effective_element, effective_action,
8764                                  direction));
8765   int base_graphic = el_act2img(effective_element, ACTION_DEFAULT);
8766   int base_crumbled = el_act2crm(effective_element, ACTION_DEFAULT);
8767   boolean has_crumbled_graphics = (base_crumbled != base_graphic);
8768   struct GraphicInfo *g = &graphic_info[graphic];
8769   int sync_frame;
8770
8771   // special case: graphic uses "2nd movement tile" and has defined
8772   // 7 frames for movement animation (or less) => use default graphic
8773   // for last (8th) frame which ends the movement animation
8774   if (g->double_movement && g->anim_frames < 8 && frame_em == 7)
8775   {
8776     effective_action = ACTION_DEFAULT;
8777     graphic = (direction == MV_NONE ?
8778                el_act2img(effective_element, effective_action) :
8779                el_act_dir2img(effective_element, effective_action,
8780                               direction));
8781     crumbled = (direction == MV_NONE ?
8782                 el_act2crm(effective_element, effective_action) :
8783                 el_act_dir2crm(effective_element, effective_action,
8784                                direction));
8785
8786     g = &graphic_info[graphic];
8787   }
8788
8789   if (graphic_info[graphic].anim_global_sync)
8790     sync_frame = FrameCounter;
8791   else if (graphic_info[graphic].anim_global_anim_sync)
8792     sync_frame = getGlobalAnimSyncFrame();
8793   else if (IN_FIELD(x, y, MAX_LEV_FIELDX, MAX_LEV_FIELDY))
8794     sync_frame = GfxFrame[x][y];
8795   else
8796     sync_frame = 0;     // playfield border (pseudo steel)
8797
8798   SetRandomAnimationValue(x, y);
8799
8800   int frame = getAnimationFrame(g->anim_frames,
8801                                 g->anim_delay,
8802                                 g->anim_mode,
8803                                 g->anim_start_frame,
8804                                 sync_frame);
8805
8806   getGraphicSourceExt(graphic, frame, &g_em->bitmap, &g_em->src_x, &g_em->src_y,
8807                       g->double_movement && is_backside);
8808
8809   // (updating the "crumbled" graphic definitions is probably not really needed,
8810   // as animations for crumbled graphics can't be longer than one EMC cycle)
8811   set_crumbled_graphics_EM(g_em, has_crumbled_graphics, crumbled,
8812                            sync_frame);
8813 }
8814
8815 void getGraphicSourcePlayerExt_EM(struct GraphicInfo_EM *g_em,
8816                                   int player_nr, int anim, int frame_em)
8817 {
8818   int element   = player_mapping[player_nr][anim].element_rnd;
8819   int action    = player_mapping[player_nr][anim].action;
8820   int direction = player_mapping[player_nr][anim].direction;
8821   int graphic = (direction == MV_NONE ?
8822                  el_act2img(element, action) :
8823                  el_act_dir2img(element, action, direction));
8824   struct GraphicInfo *g = &graphic_info[graphic];
8825   int sync_frame;
8826
8827   InitPlayerGfxAnimation(&stored_player[player_nr], action, direction);
8828
8829   stored_player[player_nr].StepFrame = frame_em;
8830
8831   sync_frame = stored_player[player_nr].Frame;
8832
8833   int frame = getAnimationFrame(g->anim_frames,
8834                                 g->anim_delay,
8835                                 g->anim_mode,
8836                                 g->anim_start_frame,
8837                                 sync_frame);
8838
8839   getGraphicSourceExt(graphic, frame, &g_em->bitmap,
8840                       &g_em->src_x, &g_em->src_y, FALSE);
8841 }
8842
8843 void InitGraphicInfo_EM(void)
8844 {
8845   int i, j, p;
8846
8847   // always start with reliable default values
8848   for (i = 0; i < GAME_TILE_MAX; i++)
8849   {
8850     object_mapping[i].element_rnd = EL_UNKNOWN;
8851     object_mapping[i].is_backside = FALSE;
8852     object_mapping[i].action = ACTION_DEFAULT;
8853     object_mapping[i].direction = MV_NONE;
8854   }
8855
8856   // always start with reliable default values
8857   for (p = 0; p < MAX_PLAYERS; p++)
8858   {
8859     for (i = 0; i < PLY_MAX; i++)
8860     {
8861       player_mapping[p][i].element_rnd = EL_UNKNOWN;
8862       player_mapping[p][i].action = ACTION_DEFAULT;
8863       player_mapping[p][i].direction = MV_NONE;
8864     }
8865   }
8866
8867   for (i = 0; em_object_mapping_list[i].element_em != -1; i++)
8868   {
8869     int e = em_object_mapping_list[i].element_em;
8870
8871     object_mapping[e].element_rnd = em_object_mapping_list[i].element_rnd;
8872     object_mapping[e].is_backside = em_object_mapping_list[i].is_backside;
8873
8874     if (em_object_mapping_list[i].action != -1)
8875       object_mapping[e].action = em_object_mapping_list[i].action;
8876
8877     if (em_object_mapping_list[i].direction != -1)
8878       object_mapping[e].direction =
8879         MV_DIR_FROM_BIT(em_object_mapping_list[i].direction);
8880   }
8881
8882   for (i = 0; em_player_mapping_list[i].action_em != -1; i++)
8883   {
8884     int a = em_player_mapping_list[i].action_em;
8885     int p = em_player_mapping_list[i].player_nr;
8886
8887     player_mapping[p][a].element_rnd = em_player_mapping_list[i].element_rnd;
8888
8889     if (em_player_mapping_list[i].action != -1)
8890       player_mapping[p][a].action = em_player_mapping_list[i].action;
8891
8892     if (em_player_mapping_list[i].direction != -1)
8893       player_mapping[p][a].direction =
8894         MV_DIR_FROM_BIT(em_player_mapping_list[i].direction);
8895   }
8896
8897   for (i = 0; i < GAME_TILE_MAX; i++)
8898   {
8899     int element = object_mapping[i].element_rnd;
8900     int action = object_mapping[i].action;
8901     int direction = object_mapping[i].direction;
8902     boolean is_backside = object_mapping[i].is_backside;
8903     boolean action_exploding = ((action == ACTION_EXPLODING ||
8904                                  action == ACTION_SMASHED_BY_ROCK ||
8905                                  action == ACTION_SMASHED_BY_SPRING) &&
8906                                 element != EL_DIAMOND);
8907     boolean action_active = (action == ACTION_ACTIVE);
8908     boolean action_other = (action == ACTION_OTHER);
8909
8910     for (j = 0; j < 8; j++)
8911     {
8912       int effective_element = get_effective_element_EM(i, j);
8913       int effective_action = (j < 7 ? action :
8914                               i == Xdrip_stretch ? action :
8915                               i == Xdrip_stretchB ? action :
8916                               i == Ydrip_1_s ? action :
8917                               i == Ydrip_1_sB ? action :
8918                               i == Yball_1 ? action :
8919                               i == Xball_2 ? action :
8920                               i == Yball_2 ? action :
8921                               i == Yball_blank ? action :
8922                               i == Ykey_1_blank ? action :
8923                               i == Ykey_2_blank ? action :
8924                               i == Ykey_3_blank ? action :
8925                               i == Ykey_4_blank ? action :
8926                               i == Ykey_5_blank ? action :
8927                               i == Ykey_6_blank ? action :
8928                               i == Ykey_7_blank ? action :
8929                               i == Ykey_8_blank ? action :
8930                               i == Ylenses_blank ? action :
8931                               i == Ymagnify_blank ? action :
8932                               i == Ygrass_blank ? action :
8933                               i == Ydirt_blank ? action :
8934                               i == Xsand_stonein_1 ? action :
8935                               i == Xsand_stonein_2 ? action :
8936                               i == Xsand_stonein_3 ? action :
8937                               i == Xsand_stonein_4 ? action :
8938                               i == Xsand_stoneout_1 ? action :
8939                               i == Xsand_stoneout_2 ? action :
8940                               i == Xboom_android ? ACTION_EXPLODING :
8941                               action_exploding ? ACTION_EXPLODING :
8942                               action_active ? action :
8943                               action_other ? action :
8944                               ACTION_DEFAULT);
8945       int graphic = (el_act_dir2img(effective_element, effective_action,
8946                                     direction));
8947       int crumbled = (el_act_dir2crm(effective_element, effective_action,
8948                                      direction));
8949       int base_graphic = el_act2img(effective_element, ACTION_DEFAULT);
8950       int base_crumbled = el_act2crm(effective_element, ACTION_DEFAULT);
8951       boolean has_action_graphics = (graphic != base_graphic);
8952       boolean has_crumbled_graphics = (base_crumbled != base_graphic);
8953       struct GraphicInfo *g = &graphic_info[graphic];
8954       struct GraphicInfo_EM *g_em = &graphic_info_em_object[i][j];
8955       Bitmap *src_bitmap;
8956       int src_x, src_y;
8957       // ensure to get symmetric 3-frame, 2-delay animations as used in EM
8958       boolean special_animation = (action != ACTION_DEFAULT &&
8959                                    g->anim_frames == 3 &&
8960                                    g->anim_delay == 2 &&
8961                                    g->anim_mode & ANIM_LINEAR);
8962       int sync_frame = (i == Xdrip_stretch ? 7 :
8963                         i == Xdrip_stretchB ? 7 :
8964                         i == Ydrip_2_s ? j + 8 :
8965                         i == Ydrip_2_sB ? j + 8 :
8966                         i == Xacid_1 ? 0 :
8967                         i == Xacid_2 ? 10 :
8968                         i == Xacid_3 ? 20 :
8969                         i == Xacid_4 ? 30 :
8970                         i == Xacid_5 ? 40 :
8971                         i == Xacid_6 ? 50 :
8972                         i == Xacid_7 ? 60 :
8973                         i == Xacid_8 ? 70 :
8974                         i == Xfake_acid_1 ? 0 :
8975                         i == Xfake_acid_2 ? 10 :
8976                         i == Xfake_acid_3 ? 20 :
8977                         i == Xfake_acid_4 ? 30 :
8978                         i == Xfake_acid_5 ? 40 :
8979                         i == Xfake_acid_6 ? 50 :
8980                         i == Xfake_acid_7 ? 60 :
8981                         i == Xfake_acid_8 ? 70 :
8982                         i == Xfake_acid_1_player ? 0 :
8983                         i == Xfake_acid_2_player ? 10 :
8984                         i == Xfake_acid_3_player ? 20 :
8985                         i == Xfake_acid_4_player ? 30 :
8986                         i == Xfake_acid_5_player ? 40 :
8987                         i == Xfake_acid_6_player ? 50 :
8988                         i == Xfake_acid_7_player ? 60 :
8989                         i == Xfake_acid_8_player ? 70 :
8990                         i == Xball_2 ? 7 :
8991                         i == Yball_2 ? j + 8 :
8992                         i == Yball_blank ? j + 1 :
8993                         i == Ykey_1_blank ? j + 1 :
8994                         i == Ykey_2_blank ? j + 1 :
8995                         i == Ykey_3_blank ? j + 1 :
8996                         i == Ykey_4_blank ? j + 1 :
8997                         i == Ykey_5_blank ? j + 1 :
8998                         i == Ykey_6_blank ? j + 1 :
8999                         i == Ykey_7_blank ? j + 1 :
9000                         i == Ykey_8_blank ? j + 1 :
9001                         i == Ylenses_blank ? j + 1 :
9002                         i == Ymagnify_blank ? j + 1 :
9003                         i == Ygrass_blank ? j + 1 :
9004                         i == Ydirt_blank ? j + 1 :
9005                         i == Xamoeba_1 ? 0 :
9006                         i == Xamoeba_2 ? 1 :
9007                         i == Xamoeba_3 ? 2 :
9008                         i == Xamoeba_4 ? 3 :
9009                         i == Xamoeba_5 ? 0 :
9010                         i == Xamoeba_6 ? 1 :
9011                         i == Xamoeba_7 ? 2 :
9012                         i == Xamoeba_8 ? 3 :
9013                         i == Xexit_2 ? j + 8 :
9014                         i == Xexit_3 ? j + 16 :
9015                         i == Xdynamite_1 ? 0 :
9016                         i == Xdynamite_2 ? 8 :
9017                         i == Xdynamite_3 ? 16 :
9018                         i == Xdynamite_4 ? 24 :
9019                         i == Xsand_stonein_1 ? j + 1 :
9020                         i == Xsand_stonein_2 ? j + 9 :
9021                         i == Xsand_stonein_3 ? j + 17 :
9022                         i == Xsand_stonein_4 ? j + 25 :
9023                         i == Xsand_stoneout_1 && j == 0 ? 0 :
9024                         i == Xsand_stoneout_1 && j == 1 ? 0 :
9025                         i == Xsand_stoneout_1 && j == 2 ? 1 :
9026                         i == Xsand_stoneout_1 && j == 3 ? 2 :
9027                         i == Xsand_stoneout_1 && j == 4 ? 2 :
9028                         i == Xsand_stoneout_1 && j == 5 ? 3 :
9029                         i == Xsand_stoneout_1 && j == 6 ? 4 :
9030                         i == Xsand_stoneout_1 && j == 7 ? 4 :
9031                         i == Xsand_stoneout_2 && j == 0 ? 5 :
9032                         i == Xsand_stoneout_2 && j == 1 ? 6 :
9033                         i == Xsand_stoneout_2 && j == 2 ? 7 :
9034                         i == Xsand_stoneout_2 && j == 3 ? 8 :
9035                         i == Xsand_stoneout_2 && j == 4 ? 9 :
9036                         i == Xsand_stoneout_2 && j == 5 ? 11 :
9037                         i == Xsand_stoneout_2 && j == 6 ? 13 :
9038                         i == Xsand_stoneout_2 && j == 7 ? 15 :
9039                         i == Xboom_bug && j == 1 ? 2 :
9040                         i == Xboom_bug && j == 2 ? 2 :
9041                         i == Xboom_bug && j == 3 ? 4 :
9042                         i == Xboom_bug && j == 4 ? 4 :
9043                         i == Xboom_bug && j == 5 ? 2 :
9044                         i == Xboom_bug && j == 6 ? 2 :
9045                         i == Xboom_bug && j == 7 ? 0 :
9046                         i == Xboom_tank && j == 1 ? 2 :
9047                         i == Xboom_tank && j == 2 ? 2 :
9048                         i == Xboom_tank && j == 3 ? 4 :
9049                         i == Xboom_tank && j == 4 ? 4 :
9050                         i == Xboom_tank && j == 5 ? 2 :
9051                         i == Xboom_tank && j == 6 ? 2 :
9052                         i == Xboom_tank && j == 7 ? 0 :
9053                         i == Xboom_android && j == 7 ? 6 :
9054                         i == Xboom_1 && j == 1 ? 2 :
9055                         i == Xboom_1 && j == 2 ? 2 :
9056                         i == Xboom_1 && j == 3 ? 4 :
9057                         i == Xboom_1 && j == 4 ? 4 :
9058                         i == Xboom_1 && j == 5 ? 6 :
9059                         i == Xboom_1 && j == 6 ? 6 :
9060                         i == Xboom_1 && j == 7 ? 8 :
9061                         i == Xboom_2 && j == 0 ? 8 :
9062                         i == Xboom_2 && j == 1 ? 8 :
9063                         i == Xboom_2 && j == 2 ? 10 :
9064                         i == Xboom_2 && j == 3 ? 10 :
9065                         i == Xboom_2 && j == 4 ? 10 :
9066                         i == Xboom_2 && j == 5 ? 12 :
9067                         i == Xboom_2 && j == 6 ? 12 :
9068                         i == Xboom_2 && j == 7 ? 12 :
9069                         special_animation && j == 4 ? 3 :
9070                         effective_action != action ? 0 :
9071                         j);
9072       int frame = getAnimationFrame(g->anim_frames,
9073                                     g->anim_delay,
9074                                     g->anim_mode,
9075                                     g->anim_start_frame,
9076                                     sync_frame);
9077
9078       getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y,
9079                           g->double_movement && is_backside);
9080
9081       g_em->bitmap = src_bitmap;
9082       g_em->src_x = src_x;
9083       g_em->src_y = src_y;
9084       g_em->src_offset_x = 0;
9085       g_em->src_offset_y = 0;
9086       g_em->dst_offset_x = 0;
9087       g_em->dst_offset_y = 0;
9088       g_em->width  = TILEX;
9089       g_em->height = TILEY;
9090
9091       g_em->preserve_background = FALSE;
9092
9093       set_crumbled_graphics_EM(g_em, has_crumbled_graphics, crumbled,
9094                                sync_frame);
9095
9096       if ((!g->double_movement && (effective_action == ACTION_FALLING ||
9097                                    effective_action == ACTION_MOVING  ||
9098                                    effective_action == ACTION_PUSHING ||
9099                                    effective_action == ACTION_EATING)) ||
9100           (!has_action_graphics && (effective_action == ACTION_FILLING ||
9101                                     effective_action == ACTION_EMPTYING)))
9102       {
9103         int move_dir =
9104           (effective_action == ACTION_FALLING ||
9105            effective_action == ACTION_FILLING ||
9106            effective_action == ACTION_EMPTYING ? MV_DOWN : direction);
9107         int dx = (move_dir == MV_LEFT ? -1 : move_dir == MV_RIGHT ? 1 : 0);
9108         int dy = (move_dir == MV_UP   ? -1 : move_dir == MV_DOWN  ? 1 : 0);
9109         int num_steps = (i == Ydrip_1_s  ? 16 :
9110                          i == Ydrip_1_sB ? 16 :
9111                          i == Ydrip_2_s  ? 16 :
9112                          i == Ydrip_2_sB ? 16 :
9113                          i == Xsand_stonein_1 ? 32 :
9114                          i == Xsand_stonein_2 ? 32 :
9115                          i == Xsand_stonein_3 ? 32 :
9116                          i == Xsand_stonein_4 ? 32 :
9117                          i == Xsand_stoneout_1 ? 16 :
9118                          i == Xsand_stoneout_2 ? 16 : 8);
9119         int cx = ABS(dx) * (TILEX / num_steps);
9120         int cy = ABS(dy) * (TILEY / num_steps);
9121         int step_frame = (i == Ydrip_2_s        ? j + 8 :
9122                           i == Ydrip_2_sB       ? j + 8 :
9123                           i == Xsand_stonein_2  ? j + 8 :
9124                           i == Xsand_stonein_3  ? j + 16 :
9125                           i == Xsand_stonein_4  ? j + 24 :
9126                           i == Xsand_stoneout_2 ? j + 8 : j) + 1;
9127         int step = (is_backside ? step_frame : num_steps - step_frame);
9128
9129         if (is_backside)        // tile where movement starts
9130         {
9131           if (dx < 0 || dy < 0)
9132           {
9133             g_em->src_offset_x = cx * step;
9134             g_em->src_offset_y = cy * step;
9135           }
9136           else
9137           {
9138             g_em->dst_offset_x = cx * step;
9139             g_em->dst_offset_y = cy * step;
9140           }
9141         }
9142         else                    // tile where movement ends
9143         {
9144           if (dx < 0 || dy < 0)
9145           {
9146             g_em->dst_offset_x = cx * step;
9147             g_em->dst_offset_y = cy * step;
9148           }
9149           else
9150           {
9151             g_em->src_offset_x = cx * step;
9152             g_em->src_offset_y = cy * step;
9153           }
9154         }
9155
9156         g_em->width  = TILEX - cx * step;
9157         g_em->height = TILEY - cy * step;
9158       }
9159
9160       // create unique graphic identifier to decide if tile must be redrawn
9161       /* bit 31 - 16 (16 bit): EM style graphic
9162          bit 15 - 12 ( 4 bit): EM style frame
9163          bit 11 -  6 ( 6 bit): graphic width
9164          bit  5 -  0 ( 6 bit): graphic height */
9165       g_em->unique_identifier =
9166         (graphic << 16) | (frame << 12) | (g_em->width << 6) | g_em->height;
9167     }
9168   }
9169
9170   for (i = 0; i < GAME_TILE_MAX; i++)
9171   {
9172     for (j = 0; j < 8; j++)
9173     {
9174       int element = object_mapping[i].element_rnd;
9175       int action = object_mapping[i].action;
9176       int direction = object_mapping[i].direction;
9177       boolean is_backside = object_mapping[i].is_backside;
9178       int graphic_action  = el_act_dir2img(element, action, direction);
9179       int graphic_default = el_act_dir2img(element, ACTION_DEFAULT, direction);
9180
9181       if ((action == ACTION_SMASHED_BY_ROCK ||
9182            action == ACTION_SMASHED_BY_SPRING ||
9183            action == ACTION_EATING) &&
9184           graphic_action == graphic_default)
9185       {
9186         int e = (action == ACTION_SMASHED_BY_ROCK   ? Ystone_s  :
9187                  action == ACTION_SMASHED_BY_SPRING ? Yspring_s :
9188                  direction == MV_LEFT  ? (is_backside? Yspring_wB: Yspring_w) :
9189                  direction == MV_RIGHT ? (is_backside? Yspring_eB: Yspring_e) :
9190                  Xspring);
9191
9192         // no separate animation for "smashed by rock" -- use rock instead
9193         struct GraphicInfo_EM *g_em = &graphic_info_em_object[i][j];
9194         struct GraphicInfo_EM *g_xx = &graphic_info_em_object[e][j];
9195
9196         g_em->bitmap            = g_xx->bitmap;
9197         g_em->src_x             = g_xx->src_x;
9198         g_em->src_y             = g_xx->src_y;
9199         g_em->src_offset_x      = g_xx->src_offset_x;
9200         g_em->src_offset_y      = g_xx->src_offset_y;
9201         g_em->dst_offset_x      = g_xx->dst_offset_x;
9202         g_em->dst_offset_y      = g_xx->dst_offset_y;
9203         g_em->width             = g_xx->width;
9204         g_em->height            = g_xx->height;
9205         g_em->unique_identifier = g_xx->unique_identifier;
9206
9207         if (!is_backside)
9208           g_em->preserve_background = TRUE;
9209       }
9210     }
9211   }
9212
9213   for (p = 0; p < MAX_PLAYERS; p++)
9214   {
9215     for (i = 0; i < PLY_MAX; i++)
9216     {
9217       int element = player_mapping[p][i].element_rnd;
9218       int action = player_mapping[p][i].action;
9219       int direction = player_mapping[p][i].direction;
9220
9221       for (j = 0; j < 8; j++)
9222       {
9223         int effective_element = element;
9224         int effective_action = action;
9225         int graphic = (direction == MV_NONE ?
9226                        el_act2img(effective_element, effective_action) :
9227                        el_act_dir2img(effective_element, effective_action,
9228                                       direction));
9229         struct GraphicInfo *g = &graphic_info[graphic];
9230         struct GraphicInfo_EM *g_em = &graphic_info_em_player[p][i][j];
9231         Bitmap *src_bitmap;
9232         int src_x, src_y;
9233         int sync_frame = j;
9234         int frame = getAnimationFrame(g->anim_frames,
9235                                       g->anim_delay,
9236                                       g->anim_mode,
9237                                       g->anim_start_frame,
9238                                       sync_frame);
9239
9240         getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y, FALSE);
9241
9242         g_em->bitmap = src_bitmap;
9243         g_em->src_x = src_x;
9244         g_em->src_y = src_y;
9245         g_em->src_offset_x = 0;
9246         g_em->src_offset_y = 0;
9247         g_em->dst_offset_x = 0;
9248         g_em->dst_offset_y = 0;
9249         g_em->width  = TILEX;
9250         g_em->height = TILEY;
9251       }
9252     }
9253   }
9254 }
9255
9256 static void CheckSaveEngineSnapshot_EM(int frame,
9257                                        boolean any_player_moving,
9258                                        boolean any_player_snapping,
9259                                        boolean any_player_dropping)
9260 {
9261   if (frame == 7 && !any_player_dropping)
9262   {
9263     if (!local_player->was_waiting)
9264     {
9265       if (!CheckSaveEngineSnapshotToList())
9266         return;
9267
9268       local_player->was_waiting = TRUE;
9269     }
9270   }
9271   else if (any_player_moving || any_player_snapping || any_player_dropping)
9272   {
9273     local_player->was_waiting = FALSE;
9274   }
9275 }
9276
9277 static void CheckSaveEngineSnapshot_SP(boolean murphy_is_waiting,
9278                                        boolean murphy_is_dropping)
9279 {
9280   if (murphy_is_waiting)
9281   {
9282     if (!local_player->was_waiting)
9283     {
9284       if (!CheckSaveEngineSnapshotToList())
9285         return;
9286
9287       local_player->was_waiting = TRUE;
9288     }
9289   }
9290   else
9291   {
9292     local_player->was_waiting = FALSE;
9293   }
9294 }
9295
9296 static void CheckSaveEngineSnapshot_MM(boolean element_clicked,
9297                                        boolean button_released)
9298 {
9299   if (button_released)
9300   {
9301     if (game.snapshot.mode == SNAPSHOT_MODE_EVERY_MOVE)
9302       CheckSaveEngineSnapshotToList();
9303   }
9304   else if (element_clicked)
9305   {
9306     if (game.snapshot.mode != SNAPSHOT_MODE_EVERY_MOVE)
9307       CheckSaveEngineSnapshotToList();
9308
9309     game.snapshot.changed_action = TRUE;
9310   }
9311 }
9312
9313 boolean CheckSingleStepMode_EM(int frame,
9314                                boolean any_player_moving,
9315                                boolean any_player_snapping,
9316                                boolean any_player_dropping)
9317 {
9318   if (tape.single_step && tape.recording && !tape.pausing)
9319     if (frame == 7 && !any_player_dropping && FrameCounter > 6)
9320       TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
9321
9322   CheckSaveEngineSnapshot_EM(frame, any_player_moving,
9323                              any_player_snapping, any_player_dropping);
9324
9325   return tape.pausing;
9326 }
9327
9328 void CheckSingleStepMode_SP(boolean murphy_is_waiting,
9329                             boolean murphy_is_dropping)
9330 {
9331   boolean murphy_starts_dropping = FALSE;
9332   int i;
9333
9334   for (i = 0; i < MAX_PLAYERS; i++)
9335     if (stored_player[i].force_dropping)
9336       murphy_starts_dropping = TRUE;
9337
9338   if (tape.single_step && tape.recording && !tape.pausing)
9339     if (murphy_is_waiting && !murphy_starts_dropping)
9340       TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
9341
9342   CheckSaveEngineSnapshot_SP(murphy_is_waiting, murphy_is_dropping);
9343 }
9344
9345 void CheckSingleStepMode_MM(boolean element_clicked,
9346                             boolean button_released)
9347 {
9348   if (tape.single_step && tape.recording && !tape.pausing)
9349     if (button_released)
9350       TapeTogglePause(TAPE_TOGGLE_AUTOMATIC);
9351
9352   CheckSaveEngineSnapshot_MM(element_clicked, button_released);
9353 }
9354
9355 void getGraphicSource_SP(struct GraphicInfo_SP *g_sp,
9356                          int graphic, int sync_frame)
9357 {
9358   int frame = getGraphicAnimationFrame(graphic, sync_frame);
9359
9360   getGraphicSource(graphic, frame, &g_sp->bitmap, &g_sp->src_x, &g_sp->src_y);
9361 }
9362
9363 boolean isNextAnimationFrame_SP(int graphic, int sync_frame)
9364 {
9365   return (IS_NEXT_FRAME(sync_frame, graphic));
9366 }
9367
9368 int getGraphicInfo_Delay(int graphic)
9369 {
9370   return graphic_info[graphic].anim_delay;
9371 }
9372
9373 boolean getGraphicInfo_NewFrame(int x, int y, int graphic)
9374 {
9375   if (!IS_NEW_FRAME(GfxFrame[x][y], graphic))
9376     return FALSE;
9377
9378   if (ANIM_MODE(graphic) & (ANIM_TILED | ANIM_RANDOM_STATIC))
9379     return FALSE;
9380
9381   return TRUE;
9382 }
9383
9384 void PlayMenuSoundExt(int sound)
9385 {
9386   if (sound == SND_UNDEFINED)
9387     return;
9388
9389   if ((!setup.sound_simple && !IS_LOOP_SOUND(sound)) ||
9390       (!setup.sound_loops && IS_LOOP_SOUND(sound)))
9391     return;
9392
9393   if (IS_LOOP_SOUND(sound))
9394     PlaySoundLoop(sound);
9395   else
9396     PlaySound(sound);
9397 }
9398
9399 void PlayMenuSound(void)
9400 {
9401   PlayMenuSoundExt(menu.sound[game_status]);
9402 }
9403
9404 void PlayMenuSoundStereo(int sound, int stereo_position)
9405 {
9406   if (sound == SND_UNDEFINED)
9407     return;
9408
9409   if ((!setup.sound_simple && !IS_LOOP_SOUND(sound)) ||
9410       (!setup.sound_loops && IS_LOOP_SOUND(sound)))
9411     return;
9412
9413   if (IS_LOOP_SOUND(sound))
9414     PlaySoundExt(sound, SOUND_MAX_VOLUME, stereo_position, SND_CTRL_PLAY_LOOP);
9415   else
9416     PlaySoundStereo(sound, stereo_position);
9417 }
9418
9419 void PlayMenuSoundIfLoopExt(int sound)
9420 {
9421   if (sound == SND_UNDEFINED)
9422     return;
9423
9424   if ((!setup.sound_simple && !IS_LOOP_SOUND(sound)) ||
9425       (!setup.sound_loops && IS_LOOP_SOUND(sound)))
9426     return;
9427
9428   if (IS_LOOP_SOUND(sound))
9429     PlaySoundLoop(sound);
9430 }
9431
9432 void PlayMenuSoundIfLoop(void)
9433 {
9434   PlayMenuSoundIfLoopExt(menu.sound[game_status]);
9435 }
9436
9437 void PlayMenuMusicExt(int music)
9438 {
9439   if (music == MUS_UNDEFINED)
9440     return;
9441
9442   if (!setup.sound_music)
9443     return;
9444
9445   if (IS_LOOP_MUSIC(music))
9446     PlayMusicLoop(music);
9447   else
9448     PlayMusic(music);
9449 }
9450
9451 void PlayMenuMusic(void)
9452 {
9453   char *curr_music = getCurrentlyPlayingMusicFilename();
9454   char *next_music = getMusicInfoEntryFilename(menu.music[game_status]);
9455
9456   if (!strEqual(curr_music, next_music))
9457     PlayMenuMusicExt(menu.music[game_status]);
9458 }
9459
9460 void PlayMenuSoundsAndMusic(void)
9461 {
9462   PlayMenuSound();
9463   PlayMenuMusic();
9464 }
9465
9466 static void FadeMenuSounds(void)
9467 {
9468   FadeSounds();
9469 }
9470
9471 static void FadeMenuMusic(void)
9472 {
9473   char *curr_music = getCurrentlyPlayingMusicFilename();
9474   char *next_music = getMusicInfoEntryFilename(menu.music[game_status]);
9475
9476   if (!strEqual(curr_music, next_music))
9477     FadeMusic();
9478 }
9479
9480 void FadeMenuSoundsAndMusic(void)
9481 {
9482   FadeMenuSounds();
9483   FadeMenuMusic();
9484 }
9485
9486 void PlaySoundActivating(void)
9487 {
9488 #if 0
9489   PlaySound(SND_MENU_ITEM_ACTIVATING);
9490 #endif
9491 }
9492
9493 void PlaySoundSelecting(void)
9494 {
9495 #if 0
9496   PlaySound(SND_MENU_ITEM_SELECTING);
9497 #endif
9498 }
9499
9500 void ToggleFullscreenIfNeeded(void)
9501 {
9502   // if setup and video fullscreen state are already matching, nothing do do
9503   if (setup.fullscreen == video.fullscreen_enabled ||
9504       !video.fullscreen_available)
9505     return;
9506
9507   SDLSetWindowFullscreen(setup.fullscreen);
9508
9509   // set setup value according to successfully changed fullscreen mode
9510   setup.fullscreen = video.fullscreen_enabled;
9511 }
9512
9513 void ChangeWindowScalingIfNeeded(void)
9514 {
9515   // if setup and video window scaling are already matching, nothing do do
9516   if (setup.window_scaling_percent == video.window_scaling_percent ||
9517       video.fullscreen_enabled)
9518     return;
9519
9520   SDLSetWindowScaling(setup.window_scaling_percent);
9521
9522   // set setup value according to successfully changed window scaling
9523   setup.window_scaling_percent = video.window_scaling_percent;
9524 }
9525
9526 void ChangeVsyncModeIfNeeded(void)
9527 {
9528   int setup_vsync_mode = VSYNC_MODE_STR_TO_INT(setup.vsync_mode);
9529   int video_vsync_mode = video.vsync_mode;
9530
9531   // if setup and video vsync mode are already matching, nothing do do
9532   if (setup_vsync_mode == video_vsync_mode)
9533     return;
9534
9535   // if renderer is using OpenGL, vsync mode can directly be changed
9536   SDLSetScreenVsyncMode(setup.vsync_mode);
9537
9538   // if vsync mode unchanged, try re-creating renderer to set vsync mode
9539   if (video.vsync_mode == video_vsync_mode)
9540   {
9541     Bitmap *tmp_backbuffer = CreateBitmap(WIN_XSIZE, WIN_YSIZE, DEFAULT_DEPTH);
9542
9543     // save backbuffer content which gets lost when re-creating screen
9544     BlitBitmap(backbuffer, tmp_backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
9545
9546     // force re-creating screen and renderer to set new vsync mode
9547     video.fullscreen_enabled = !setup.fullscreen;
9548
9549     // when creating new renderer, destroy textures linked to old renderer
9550     FreeAllImageTextures();     // needs old renderer to free the textures
9551
9552     // re-create screen and renderer (including change of vsync mode)
9553     ChangeVideoModeIfNeeded(setup.fullscreen);
9554
9555     // set setup value according to successfully changed fullscreen mode
9556     setup.fullscreen = video.fullscreen_enabled;
9557
9558     // restore backbuffer content from temporary backbuffer backup bitmap
9559     BlitBitmap(tmp_backbuffer, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
9560     FreeBitmap(tmp_backbuffer);
9561
9562     // update visible window/screen
9563     BlitBitmap(backbuffer, window, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
9564
9565     // when changing vsync mode, re-create textures for new renderer
9566     InitImageTextures();
9567   }
9568
9569   // set setup value according to successfully changed vsync mode
9570   setup.vsync_mode = VSYNC_MODE_INT_TO_STR(video.vsync_mode);
9571 }
9572
9573 static void JoinRectangles(int *x, int *y, int *width, int *height,
9574                            int x2, int y2, int width2, int height2)
9575 {
9576   // do not join with "off-screen" rectangle
9577   if (x2 == -1 || y2 == -1)
9578     return;
9579
9580   *x = MIN(*x, x2);
9581   *y = MIN(*y, y2);
9582   *width = MAX(*width, width2);
9583   *height = MAX(*height, height2);
9584 }
9585
9586 void SetAnimStatus(int anim_status_new)
9587 {
9588   if (anim_status_new == GAME_MODE_MAIN)
9589     anim_status_new = GAME_MODE_PSEUDO_MAINONLY;
9590   else if (anim_status_new == GAME_MODE_NAMES)
9591     anim_status_new = GAME_MODE_PSEUDO_NAMESONLY;
9592   else if (anim_status_new == GAME_MODE_SCORES)
9593     anim_status_new = GAME_MODE_PSEUDO_SCORESOLD;
9594
9595   global.anim_status_next = anim_status_new;
9596
9597   // directly set screen modes that are entered without fading
9598   if ((global.anim_status      == GAME_MODE_PSEUDO_MAINONLY &&
9599        global.anim_status_next == GAME_MODE_PSEUDO_TYPENAME) ||
9600       (global.anim_status      == GAME_MODE_PSEUDO_TYPENAME &&
9601        global.anim_status_next == GAME_MODE_PSEUDO_MAINONLY) ||
9602       (global.anim_status      == GAME_MODE_PSEUDO_NAMESONLY &&
9603        global.anim_status_next == GAME_MODE_PSEUDO_TYPENAMES) ||
9604       (global.anim_status      == GAME_MODE_PSEUDO_TYPENAMES &&
9605        global.anim_status_next == GAME_MODE_PSEUDO_NAMESONLY))
9606     global.anim_status = global.anim_status_next;
9607 }
9608
9609 void SetGameStatus(int game_status_new)
9610 {
9611   if (game_status_new != game_status)
9612     game_status_last_screen = game_status;
9613
9614   game_status = game_status_new;
9615
9616   SetAnimStatus(game_status_new);
9617 }
9618
9619 void SetFontStatus(int game_status_new)
9620 {
9621   static int last_game_status = -1;
9622
9623   if (game_status_new != -1)
9624   {
9625     // set game status for font use after storing last game status
9626     last_game_status = game_status;
9627     game_status = game_status_new;
9628   }
9629   else
9630   {
9631     // reset game status after font use from last stored game status
9632     game_status = last_game_status;
9633   }
9634 }
9635
9636 void ResetFontStatus(void)
9637 {
9638   SetFontStatus(-1);
9639 }
9640
9641 void SetLevelSetInfo(char *identifier, int level_nr)
9642 {
9643   setString(&levelset.identifier, identifier);
9644
9645   levelset.level_nr = level_nr;
9646 }
9647
9648 boolean CheckIfAllViewportsHaveChanged(void)
9649 {
9650   // if game status has not changed, viewports have not changed either
9651   if (game_status == game_status_last)
9652     return FALSE;
9653
9654   // check if all viewports have changed with current game status
9655
9656   struct RectWithBorder *vp_playfield = &viewport.playfield[game_status];
9657   struct RectWithBorder *vp_door_1    = &viewport.door_1[game_status];
9658   struct RectWithBorder *vp_door_2    = &viewport.door_2[game_status];
9659   int new_real_sx       = vp_playfield->x;
9660   int new_real_sy       = vp_playfield->y;
9661   int new_full_sxsize   = vp_playfield->width;
9662   int new_full_sysize   = vp_playfield->height;
9663   int new_dx            = vp_door_1->x;
9664   int new_dy            = vp_door_1->y;
9665   int new_dxsize        = vp_door_1->width;
9666   int new_dysize        = vp_door_1->height;
9667   int new_vx            = vp_door_2->x;
9668   int new_vy            = vp_door_2->y;
9669   int new_vxsize        = vp_door_2->width;
9670   int new_vysize        = vp_door_2->height;
9671
9672   boolean playfield_viewport_has_changed =
9673     (new_real_sx != REAL_SX ||
9674      new_real_sy != REAL_SY ||
9675      new_full_sxsize != FULL_SXSIZE ||
9676      new_full_sysize != FULL_SYSIZE);
9677
9678   boolean door_1_viewport_has_changed =
9679     (new_dx != DX ||
9680      new_dy != DY ||
9681      new_dxsize != DXSIZE ||
9682      new_dysize != DYSIZE);
9683
9684   boolean door_2_viewport_has_changed =
9685     (new_vx != VX ||
9686      new_vy != VY ||
9687      new_vxsize != VXSIZE ||
9688      new_vysize != VYSIZE ||
9689      game_status_last == GAME_MODE_EDITOR);
9690
9691   return (playfield_viewport_has_changed &&
9692           door_1_viewport_has_changed &&
9693           door_2_viewport_has_changed);
9694 }
9695
9696 boolean CheckFadeAll(void)
9697 {
9698   return (CheckIfGlobalBorderHasChanged() ||
9699           CheckIfAllViewportsHaveChanged());
9700 }
9701
9702 void ChangeViewportPropertiesIfNeeded(void)
9703 {
9704   boolean use_mini_tilesize = (level.game_engine_type == GAME_ENGINE_TYPE_MM ?
9705                                FALSE : setup.small_game_graphics);
9706   int gfx_game_mode = getGlobalGameStatus(game_status);
9707   int gfx_game_mode2 = (gfx_game_mode == GAME_MODE_EDITOR ? GAME_MODE_DEFAULT :
9708                         gfx_game_mode);
9709   struct RectWithBorder *vp_window    = &viewport.window[gfx_game_mode];
9710   struct RectWithBorder *vp_playfield = &viewport.playfield[gfx_game_mode];
9711   struct RectWithBorder *vp_door_1    = &viewport.door_1[gfx_game_mode];
9712   struct RectWithBorder *vp_door_2    = &viewport.door_2[gfx_game_mode2];
9713   struct RectWithBorder *vp_door_3    = &viewport.door_2[GAME_MODE_EDITOR];
9714   int new_win_xsize     = vp_window->width;
9715   int new_win_ysize     = vp_window->height;
9716   int border_left       = vp_playfield->border_left;
9717   int border_right      = vp_playfield->border_right;
9718   int border_top        = vp_playfield->border_top;
9719   int border_bottom     = vp_playfield->border_bottom;
9720   int new_sx            = vp_playfield->x      + border_left;
9721   int new_sy            = vp_playfield->y      + border_top;
9722   int new_sxsize        = vp_playfield->width  - border_left - border_right;
9723   int new_sysize        = vp_playfield->height - border_top  - border_bottom;
9724   int new_real_sx       = vp_playfield->x;
9725   int new_real_sy       = vp_playfield->y;
9726   int new_full_sxsize   = vp_playfield->width;
9727   int new_full_sysize   = vp_playfield->height;
9728   int new_dx            = vp_door_1->x;
9729   int new_dy            = vp_door_1->y;
9730   int new_dxsize        = vp_door_1->width;
9731   int new_dysize        = vp_door_1->height;
9732   int new_vx            = vp_door_2->x;
9733   int new_vy            = vp_door_2->y;
9734   int new_vxsize        = vp_door_2->width;
9735   int new_vysize        = vp_door_2->height;
9736   int new_ex            = vp_door_3->x;
9737   int new_ey            = vp_door_3->y;
9738   int new_exsize        = vp_door_3->width;
9739   int new_eysize        = vp_door_3->height;
9740   int new_tilesize_var = (use_mini_tilesize ? MINI_TILESIZE : game.tile_size);
9741   int tilesize = (gfx_game_mode == GAME_MODE_PLAYING ? new_tilesize_var :
9742                   gfx_game_mode == GAME_MODE_EDITOR ? MINI_TILESIZE : TILESIZE);
9743   int new_scr_fieldx = new_sxsize / tilesize;
9744   int new_scr_fieldy = new_sysize / tilesize;
9745   int new_scr_fieldx_buffers = new_sxsize / new_tilesize_var;
9746   int new_scr_fieldy_buffers = new_sysize / new_tilesize_var;
9747   boolean init_gfx_buffers = FALSE;
9748   boolean init_video_buffer = FALSE;
9749   boolean init_gadgets_and_anims = FALSE;
9750   boolean init_em_graphics = FALSE;
9751
9752   if (new_win_xsize != WIN_XSIZE ||
9753       new_win_ysize != WIN_YSIZE)
9754   {
9755     WIN_XSIZE = new_win_xsize;
9756     WIN_YSIZE = new_win_ysize;
9757
9758     init_video_buffer = TRUE;
9759     init_gfx_buffers = TRUE;
9760     init_gadgets_and_anims = TRUE;
9761
9762     // Debug("tools:viewport", "video: init_video_buffer, init_gfx_buffers");
9763   }
9764
9765   if (new_scr_fieldx != SCR_FIELDX ||
9766       new_scr_fieldy != SCR_FIELDY)
9767   {
9768     // this always toggles between MAIN and GAME when using small tile size
9769
9770     SCR_FIELDX = new_scr_fieldx;
9771     SCR_FIELDY = new_scr_fieldy;
9772
9773     // Debug("tools:viewport", "new_scr_fieldx != SCR_FIELDX ...");
9774   }
9775
9776   if (new_sx != SX ||
9777       new_sy != SY ||
9778       new_dx != DX ||
9779       new_dy != DY ||
9780       new_vx != VX ||
9781       new_vy != VY ||
9782       new_ex != EX ||
9783       new_ey != EY ||
9784       new_sxsize != SXSIZE ||
9785       new_sysize != SYSIZE ||
9786       new_dxsize != DXSIZE ||
9787       new_dysize != DYSIZE ||
9788       new_vxsize != VXSIZE ||
9789       new_vysize != VYSIZE ||
9790       new_exsize != EXSIZE ||
9791       new_eysize != EYSIZE ||
9792       new_real_sx != REAL_SX ||
9793       new_real_sy != REAL_SY ||
9794       new_full_sxsize != FULL_SXSIZE ||
9795       new_full_sysize != FULL_SYSIZE ||
9796       new_tilesize_var != TILESIZE_VAR
9797       )
9798   {
9799     // ------------------------------------------------------------------------
9800     // determine next fading area for changed viewport definitions
9801     // ------------------------------------------------------------------------
9802
9803     // start with current playfield area (default fading area)
9804     FADE_SX = REAL_SX;
9805     FADE_SY = REAL_SY;
9806     FADE_SXSIZE = FULL_SXSIZE;
9807     FADE_SYSIZE = FULL_SYSIZE;
9808
9809     // add new playfield area if position or size has changed
9810     if (new_real_sx != REAL_SX || new_real_sy != REAL_SY ||
9811         new_full_sxsize != FULL_SXSIZE || new_full_sysize != FULL_SYSIZE)
9812     {
9813       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9814                      new_real_sx, new_real_sy, new_full_sxsize,new_full_sysize);
9815     }
9816
9817     // add current and new door 1 area if position or size has changed
9818     if (new_dx != DX || new_dy != DY ||
9819         new_dxsize != DXSIZE || new_dysize != DYSIZE)
9820     {
9821       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9822                      DX, DY, DXSIZE, DYSIZE);
9823       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9824                      new_dx, new_dy, new_dxsize, new_dysize);
9825     }
9826
9827     // add current and new door 2 area if position or size has changed
9828     if (new_vx != VX || new_vy != VY ||
9829         new_vxsize != VXSIZE || new_vysize != VYSIZE)
9830     {
9831       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9832                      VX, VY, VXSIZE, VYSIZE);
9833       JoinRectangles(&FADE_SX, &FADE_SY, &FADE_SXSIZE, &FADE_SYSIZE,
9834                      new_vx, new_vy, new_vxsize, new_vysize);
9835     }
9836
9837     // ------------------------------------------------------------------------
9838     // handle changed tile size
9839     // ------------------------------------------------------------------------
9840
9841     if (new_tilesize_var != TILESIZE_VAR)
9842     {
9843       // Debug("tools:viewport", "new_tilesize_var != TILESIZE_VAR");
9844
9845       // changing tile size invalidates scroll values of engine snapshots
9846       FreeEngineSnapshotSingle();
9847
9848       // changing tile size requires update of graphic mapping for EM engine
9849       init_em_graphics = TRUE;
9850     }
9851
9852     SX = new_sx;
9853     SY = new_sy;
9854     DX = new_dx;
9855     DY = new_dy;
9856     VX = new_vx;
9857     VY = new_vy;
9858     EX = new_ex;
9859     EY = new_ey;
9860     SXSIZE = new_sxsize;
9861     SYSIZE = new_sysize;
9862     DXSIZE = new_dxsize;
9863     DYSIZE = new_dysize;
9864     VXSIZE = new_vxsize;
9865     VYSIZE = new_vysize;
9866     EXSIZE = new_exsize;
9867     EYSIZE = new_eysize;
9868     REAL_SX = new_real_sx;
9869     REAL_SY = new_real_sy;
9870     FULL_SXSIZE = new_full_sxsize;
9871     FULL_SYSIZE = new_full_sysize;
9872     TILESIZE_VAR = new_tilesize_var;
9873
9874     init_gfx_buffers = TRUE;
9875     init_gadgets_and_anims = TRUE;
9876
9877     // Debug("tools:viewport", "viewports: init_gfx_buffers");
9878     // Debug("tools:viewport", "viewports: init_gadgets_and_anims");
9879   }
9880
9881   if (init_gfx_buffers)
9882   {
9883     // Debug("tools:viewport", "init_gfx_buffers");
9884
9885     SCR_FIELDX = new_scr_fieldx_buffers;
9886     SCR_FIELDY = new_scr_fieldy_buffers;
9887
9888     InitGfxBuffers();
9889
9890     SCR_FIELDX = new_scr_fieldx;
9891     SCR_FIELDY = new_scr_fieldy;
9892
9893     SetDrawDeactivationMask(REDRAW_NONE);
9894     SetDrawBackgroundMask(REDRAW_FIELD);
9895   }
9896
9897   if (init_video_buffer)
9898   {
9899     // Debug("tools:viewport", "init_video_buffer");
9900
9901     FreeAllImageTextures();     // needs old renderer to free the textures
9902
9903     InitVideoBuffer(WIN_XSIZE, WIN_YSIZE, DEFAULT_DEPTH, setup.fullscreen);
9904     InitImageTextures();
9905   }
9906
9907   if (init_gadgets_and_anims)
9908   {
9909     // Debug("tools:viewport", "init_gadgets_and_anims");
9910
9911     InitGadgets();
9912     InitGlobalAnimations();
9913   }
9914
9915   if (init_em_graphics)
9916   {
9917     InitGraphicInfo_EM();
9918   }
9919 }
9920
9921 void OpenURL(char *url)
9922 {
9923 #if SDL_VERSION_ATLEAST(2,0,14)
9924   SDL_OpenURL(url);
9925 #else
9926   Warn("SDL_OpenURL(\"%s\") not supported by SDL %d.%d.%d!",
9927        url, SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL);
9928   Warn("Please upgrade to at least SDL 2.0.14 for URL support!");
9929 #endif
9930 }
9931
9932 void OpenURLFromHash(SetupFileHash *hash, int hash_key)
9933 {
9934   OpenURL(getHashEntry(hash, int2str(hash_key, 0)));
9935 }
9936
9937
9938 // ============================================================================
9939 // tests
9940 // ============================================================================
9941
9942 #if defined(PLATFORM_WINDOWS)
9943 /* FILETIME of Jan 1 1970 00:00:00. */
9944 static const unsigned __int64 epoch = ((unsigned __int64) 116444736000000000ULL);
9945
9946 /*
9947  * timezone information is stored outside the kernel so tzp isn't used anymore.
9948  *
9949  * Note: this function is not for Win32 high precision timing purpose. See
9950  * elapsed_time().
9951  */
9952 static int gettimeofday_windows(struct timeval * tp, struct timezone * tzp)
9953 {
9954   FILETIME    file_time;
9955   SYSTEMTIME  system_time;
9956   ULARGE_INTEGER ularge;
9957
9958   GetSystemTime(&system_time);
9959   SystemTimeToFileTime(&system_time, &file_time);
9960   ularge.LowPart = file_time.dwLowDateTime;
9961   ularge.HighPart = file_time.dwHighDateTime;
9962
9963   tp->tv_sec = (long) ((ularge.QuadPart - epoch) / 10000000L);
9964   tp->tv_usec = (long) (system_time.wMilliseconds * 1000);
9965
9966   return 0;
9967 }
9968 #endif
9969
9970 static char *test_init_uuid_random_function_simple(void)
9971 {
9972   static char seed_text[100];
9973   unsigned int seed = InitSimpleRandom(NEW_RANDOMIZE);
9974
9975   sprintf(seed_text, "%d", seed);
9976
9977   return seed_text;
9978 }
9979
9980 static char *test_init_uuid_random_function_better(void)
9981 {
9982   static char seed_text[100];
9983   struct timeval current_time;
9984
9985   gettimeofday(&current_time, NULL);
9986
9987   prng_seed_bytes(&current_time, sizeof(current_time));
9988
9989   sprintf(seed_text, "%ld.%ld",
9990           (long)current_time.tv_sec,
9991           (long)current_time.tv_usec);
9992
9993   return seed_text;
9994 }
9995
9996 #if defined(PLATFORM_WINDOWS)
9997 static char *test_init_uuid_random_function_better_windows(void)
9998 {
9999   static char seed_text[100];
10000   struct timeval current_time;
10001
10002   gettimeofday_windows(&current_time, NULL);
10003
10004   prng_seed_bytes(&current_time, sizeof(current_time));
10005
10006   sprintf(seed_text, "%ld.%ld",
10007           (long)current_time.tv_sec,
10008           (long)current_time.tv_usec);
10009
10010   return seed_text;
10011 }
10012 #endif
10013
10014 static unsigned int test_uuid_random_function_simple(int max)
10015 {
10016   return GetSimpleRandom(max);
10017 }
10018
10019 static unsigned int test_uuid_random_function_better(int max)
10020 {
10021   return (max > 0 ? prng_get_uint() % max : 0);
10022 }
10023
10024 #if defined(PLATFORM_WINDOWS)
10025 #define NUM_UUID_TESTS                  3
10026 #else
10027 #define NUM_UUID_TESTS                  2
10028 #endif
10029
10030 static void TestGeneratingUUIDs_RunTest(int nr, int always_seed, int num_uuids)
10031 {
10032   struct hashtable *hash_seeds =
10033     create_hashtable(16, 0.75, get_hash_from_key, hash_keys_are_equal);
10034   struct hashtable *hash_uuids =
10035     create_hashtable(16, 0.75, get_hash_from_key, hash_keys_are_equal);
10036   static char message[100];
10037   int i;
10038
10039   char *random_name = (nr == 0 ? "simple" : "better");
10040   char *random_type = (always_seed ? "always" : "only once");
10041   char *(*init_random_function)(void) =
10042     (nr == 0 ?
10043      test_init_uuid_random_function_simple :
10044      test_init_uuid_random_function_better);
10045   unsigned int (*random_function)(int) =
10046     (nr == 0 ?
10047      test_uuid_random_function_simple :
10048      test_uuid_random_function_better);
10049   int xpos = 40;
10050
10051 #if defined(PLATFORM_WINDOWS)
10052   if (nr == 2)
10053   {
10054     random_name = "windows";
10055     init_random_function = test_init_uuid_random_function_better_windows;
10056   }
10057 #endif
10058
10059   ClearField();
10060
10061   DrawTextF(xpos, 40, FC_GREEN, "Test: Generating UUIDs");
10062   DrawTextF(xpos, 80, FC_YELLOW, "Test %d.%d:", nr + 1, always_seed + 1);
10063
10064   DrawTextF(xpos, 100, FC_YELLOW, "Random Generator Name: %s", random_name);
10065   DrawTextF(xpos, 120, FC_YELLOW, "Seeding Random Generator: %s", random_type);
10066   DrawTextF(xpos, 140, FC_YELLOW, "Number of UUIDs generated: %d", num_uuids);
10067
10068   DrawTextF(xpos, 180, FC_GREEN, "Please wait ...");
10069
10070   BackToFront();
10071
10072   // always initialize random number generator at least once
10073   init_random_function();
10074
10075   unsigned int time_start = SDL_GetTicks();
10076
10077   for (i = 0; i < num_uuids; i++)
10078   {
10079     if (always_seed)
10080     {
10081       char *seed = getStringCopy(init_random_function());
10082
10083       hashtable_remove(hash_seeds, seed);
10084       hashtable_insert(hash_seeds, seed, "1");
10085     }
10086
10087     char *uuid = getStringCopy(getUUIDExt(random_function));
10088
10089     hashtable_remove(hash_uuids, uuid);
10090     hashtable_insert(hash_uuids, uuid, "1");
10091   }
10092
10093   int num_unique_seeds = hashtable_count(hash_seeds);
10094   int num_unique_uuids = hashtable_count(hash_uuids);
10095
10096   unsigned int time_needed = SDL_GetTicks() - time_start;
10097
10098   DrawTextF(xpos, 220, FC_YELLOW, "Time needed: %d ms", time_needed);
10099
10100   DrawTextF(xpos, 240, FC_YELLOW, "Number of unique UUIDs: %d", num_unique_uuids);
10101
10102   if (always_seed)
10103     DrawTextF(xpos, 260, FC_YELLOW, "Number of unique seeds: %d", num_unique_seeds);
10104
10105   if (nr == NUM_UUID_TESTS - 1 && always_seed)
10106     DrawTextF(xpos, 300, FC_GREEN, "All tests done!");
10107   else
10108     DrawTextF(xpos, 300, FC_GREEN, "Confirm dialog for next test ...");
10109
10110   sprintf(message, "Test %d.%d finished!", nr + 1, always_seed + 1);
10111
10112   Request(message, REQ_CONFIRM);
10113
10114   hashtable_destroy(hash_seeds, 0);
10115   hashtable_destroy(hash_uuids, 0);
10116 }
10117
10118 void TestGeneratingUUIDs(void)
10119 {
10120   int num_uuids = 1000000;
10121   int i, j;
10122
10123   for (i = 0; i < NUM_UUID_TESTS; i++)
10124     for (j = 0; j < 2; j++)
10125       TestGeneratingUUIDs_RunTest(i, j, num_uuids);
10126
10127   CloseAllAndExit(0);
10128 }