+void SetDoorBackgroundImageIfDefined(int graphic)
+{
+ if (graphic_info[graphic].bitmap)
+ SetBackgroundImage(graphic, REDRAW_DOOR_1);
+}
+
+void SetWindowBackgroundImage(int graphic)
+{
+ SetBackgroundImage(getBackgroundImage(graphic), REDRAW_ALL);
+}
+
+void SetMainBackgroundImage(int graphic)
+{
+ SetBackgroundImage(getBackgroundImage(graphic), REDRAW_FIELD);
+}
+
+void SetDoorBackgroundImage(int graphic)
+{
+ SetBackgroundImage(getBackgroundImage(graphic), REDRAW_DOOR_1);
+}
+
+void SetPanelBackground(void)
+{
+ SetDoorBackgroundImage(IMG_BACKGROUND_PANEL);
+}
+
+void DrawBackground(int x, int y, int width, int height)
+{
+ // "drawto" might still point to playfield buffer here (hall of fame)
+ ClearRectangleOnBackground(backbuffer, x, y, width, height);
+
+ if (IN_GFX_FIELD_FULL(x, y))
+ redraw_mask |= REDRAW_FIELD;
+ else if (IN_GFX_DOOR_1(x, y))
+ redraw_mask |= REDRAW_DOOR_1;
+ else if (IN_GFX_DOOR_2(x, y))
+ redraw_mask |= REDRAW_DOOR_2;
+ else if (IN_GFX_DOOR_3(x, y))
+ redraw_mask |= REDRAW_DOOR_3;
+}
+
+void DrawBackgroundForFont(int x, int y, int width, int height, int font_nr)
+{
+ struct FontBitmapInfo *font = getFontBitmapInfo(font_nr);
+
+ if (font->bitmap == NULL)
+ return;
+
+ DrawBackground(x, y, width, height);
+}
+
+void DrawBackgroundForGraphic(int x, int y, int width, int height, int graphic)
+{
+ struct GraphicInfo *g = &graphic_info[graphic];
+
+ if (g->bitmap == NULL)
+ return;
+
+ DrawBackground(x, y, width, height);
+}
+
+static int game_status_last = -1;
+static Bitmap *global_border_bitmap_last = NULL;
+static Bitmap *global_border_bitmap = NULL;
+static int real_sx_last = -1, real_sy_last = -1;
+static int full_sxsize_last = -1, full_sysize_last = -1;
+static int dx_last = -1, dy_last = -1;
+static int dxsize_last = -1, dysize_last = -1;
+static int vx_last = -1, vy_last = -1;
+static int vxsize_last = -1, vysize_last = -1;
+static int ex_last = -1, ey_last = -1;
+static int exsize_last = -1, eysize_last = -1;
+
+boolean CheckIfGlobalBorderHasChanged(void)
+{
+ // if game status has not changed, global border has not changed either
+ if (game_status == game_status_last)
+ return FALSE;
+
+ // determine and store new global border bitmap for current game status
+ global_border_bitmap = getGlobalBorderBitmapFromStatus(game_status);
+
+ return (global_border_bitmap_last != global_border_bitmap);
+}
+
+#define ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED 0
+
+#if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
+static boolean CheckIfGlobalBorderRedrawIsNeeded(void)
+{
+ // if game status has not changed, nothing has to be redrawn
+ if (game_status == game_status_last)
+ return FALSE;
+
+ // redraw if last screen was title screen
+ if (game_status_last == GAME_MODE_TITLE)
+ return TRUE;
+
+ // redraw if global screen border has changed
+ if (CheckIfGlobalBorderHasChanged())
+ return TRUE;
+
+ // redraw if position or size of playfield area has changed
+ if (real_sx_last != REAL_SX || real_sy_last != REAL_SY ||
+ full_sxsize_last != FULL_SXSIZE || full_sysize_last != FULL_SYSIZE)
+ return TRUE;
+
+ // redraw if position or size of door area has changed
+ if (dx_last != DX || dy_last != DY ||
+ dxsize_last != DXSIZE || dysize_last != DYSIZE)
+ return TRUE;
+
+ // redraw if position or size of tape area has changed
+ if (vx_last != VX || vy_last != VY ||
+ vxsize_last != VXSIZE || vysize_last != VYSIZE)
+ return TRUE;
+
+ // redraw if position or size of editor area has changed
+ if (ex_last != EX || ey_last != EY ||
+ exsize_last != EXSIZE || eysize_last != EYSIZE)
+ return TRUE;
+
+ return FALSE;
+}
+#endif
+
+static void RedrawGlobalBorderFromBitmap(Bitmap *bitmap)
+{
+ if (bitmap)
+ BlitBitmap(bitmap, backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
+ else
+ ClearRectangle(backbuffer, 0, 0, WIN_XSIZE, WIN_YSIZE);
+}
+
+void RedrawGlobalBorder(void)
+{
+ Bitmap *bitmap = getGlobalBorderBitmapFromStatus(game_status);
+
+ RedrawGlobalBorderFromBitmap(bitmap);
+
+ redraw_mask = REDRAW_ALL;
+}
+
+static void RedrawGlobalBorderIfNeeded(void)
+{
+#if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
+ if (game_status == game_status_last)
+ return;
+#endif
+
+ // copy current draw buffer to later copy back areas that have not changed
+ if (game_status_last != GAME_MODE_TITLE)
+ BlitBitmap(backbuffer, bitmap_db_store_1, 0, 0, WIN_XSIZE, WIN_YSIZE, 0, 0);
+
+#if ONLY_REDRAW_GLOBAL_BORDER_IF_NEEDED
+ if (CheckIfGlobalBorderRedrawIsNeeded())
+#else
+ // determine and store new global border bitmap for current game status
+ global_border_bitmap = getGlobalBorderBitmapFromStatus(game_status);
+#endif
+ {
+ // redraw global screen border (or clear, if defined to be empty)
+ RedrawGlobalBorderFromBitmap(global_border_bitmap);
+
+ if (game_status == GAME_MODE_EDITOR)
+ DrawSpecialEditorDoor();
+
+ // copy previous playfield and door areas, if they are defined on both
+ // previous and current screen and if they still have the same size
+
+ if (real_sx_last != -1 && real_sy_last != -1 &&
+ REAL_SX != -1 && REAL_SY != -1 &&
+ full_sxsize_last == FULL_SXSIZE && full_sysize_last == FULL_SYSIZE)
+ BlitBitmap(bitmap_db_store_1, backbuffer,
+ real_sx_last, real_sy_last, FULL_SXSIZE, FULL_SYSIZE,
+ REAL_SX, REAL_SY);
+
+ if (dx_last != -1 && dy_last != -1 &&
+ DX != -1 && DY != -1 &&
+ dxsize_last == DXSIZE && dysize_last == DYSIZE)
+ BlitBitmap(bitmap_db_store_1, backbuffer,
+ dx_last, dy_last, DXSIZE, DYSIZE, DX, DY);
+
+ if (game_status != GAME_MODE_EDITOR)
+ {
+ if (vx_last != -1 && vy_last != -1 &&
+ VX != -1 && VY != -1 &&
+ vxsize_last == VXSIZE && vysize_last == VYSIZE)
+ BlitBitmap(bitmap_db_store_1, backbuffer,
+ vx_last, vy_last, VXSIZE, VYSIZE, VX, VY);
+ }
+ else
+ {
+ if (ex_last != -1 && ey_last != -1 &&
+ EX != -1 && EY != -1 &&
+ exsize_last == EXSIZE && eysize_last == EYSIZE)
+ BlitBitmap(bitmap_db_store_1, backbuffer,
+ ex_last, ey_last, EXSIZE, EYSIZE, EX, EY);
+ }
+
+ redraw_mask = REDRAW_ALL;
+ }
+
+ game_status_last = game_status;
+
+ global_border_bitmap_last = global_border_bitmap;
+
+ real_sx_last = REAL_SX;
+ real_sy_last = REAL_SY;
+ full_sxsize_last = FULL_SXSIZE;
+ full_sysize_last = FULL_SYSIZE;
+ dx_last = DX;
+ dy_last = DY;
+ dxsize_last = DXSIZE;
+ dysize_last = DYSIZE;
+ vx_last = VX;
+ vy_last = VY;
+ vxsize_last = VXSIZE;
+ vysize_last = VYSIZE;
+ ex_last = EX;
+ ey_last = EY;
+ exsize_last = EXSIZE;
+ eysize_last = EYSIZE;
+}
+
+void ClearField(void)
+{
+ RedrawGlobalBorderIfNeeded();
+
+ // !!! "drawto" might still point to playfield buffer here (see above) !!!
+ // (when entering hall of fame after playing)
+ DrawBackground(REAL_SX, REAL_SY, FULL_SXSIZE, FULL_SYSIZE);
+
+ // !!! maybe this should be done before clearing the background !!!
+ if (game_status == GAME_MODE_PLAYING)
+ {
+ ClearRectangle(fieldbuffer, 0, 0, FXSIZE, FYSIZE);
+ SetDrawtoField(DRAW_TO_FIELDBUFFER);
+ }
+ else
+ {
+ SetDrawtoField(DRAW_TO_BACKBUFFER);
+ }
+}
+
+void MarkTileDirty(int x, int y)
+{
+ redraw_mask |= REDRAW_FIELD;
+}
+
+void SetBorderElement(void)
+{
+ int x, y;
+
+ BorderElement = EL_EMPTY;
+
+ // only the R'n'D game engine may use an additional steelwall border
+ if (level.game_engine_type != GAME_ENGINE_TYPE_RND)
+ return;
+
+ for (y = 0; y < lev_fieldy && BorderElement == EL_EMPTY; y++)
+ {
+ for (x = 0; x < lev_fieldx; x++)
+ {
+ if (!IS_INDESTRUCTIBLE(Tile[x][y]))
+ BorderElement = EL_STEELWALL;
+
+ if (y != 0 && y != lev_fieldy - 1 && x != lev_fieldx - 1)
+ x = lev_fieldx - 2;
+ }
+ }
+}
+
+void FloodFillLevelExt(int start_x, int start_y, int fill_element,
+ int max_array_fieldx, int max_array_fieldy,
+ short field[max_array_fieldx][max_array_fieldy],
+ int max_fieldx, int max_fieldy)
+{
+ static struct XY stack_buffer[MAX_LEV_FIELDX * MAX_LEV_FIELDY];
+ struct XY *check = xy_topdown;
+ int old_element = field[start_x][start_y];
+ int stack_pos = 0;
+
+ // do nothing if start field already has the desired content
+ if (old_element == fill_element)
+ return;
+
+ stack_buffer[stack_pos++] = (struct XY){ start_x, start_y };
+
+ while (stack_pos > 0)
+ {
+ struct XY current = stack_buffer[--stack_pos];
+ int i;
+
+ field[current.x][current.y] = fill_element;
+
+ for (i = 0; i < 4; i++)
+ {
+ int x = current.x + check[i].x;
+ int y = current.y + check[i].y;
+
+ // check for stack buffer overflow (should not happen)
+ if (stack_pos >= MAX_LEV_FIELDX * MAX_LEV_FIELDY)
+ Fail("Stack buffer overflow in 'FloodFillLevelExt()'. Please debug.");
+
+ if (IN_FIELD(x, y, max_fieldx, max_fieldy) && field[x][y] == old_element)
+ stack_buffer[stack_pos++] = (struct XY){ x, y };
+ }
+ }
+}
+
+void FloodFillLevel(int from_x, int from_y, int fill_element,
+ short field[MAX_LEV_FIELDX][MAX_LEV_FIELDY],
+ int max_fieldx, int max_fieldy)
+{
+ FloodFillLevelExt(from_x, from_y, fill_element,
+ MAX_LEV_FIELDX, MAX_LEV_FIELDY, field,
+ max_fieldx, max_fieldy);
+}
+
+void SetRandomAnimationValue(int x, int y)
+{
+ gfx.anim_random_frame = GfxRandom[x][y];
+}
+
+int getGraphicAnimationFrame(int graphic, int sync_frame)
+{
+ // animation synchronized with global frame counter, not move position
+ if (graphic_info[graphic].anim_global_sync || sync_frame < 0)
+ sync_frame = FrameCounter;
+ else if (graphic_info[graphic].anim_global_anim_sync)
+ sync_frame = getGlobalAnimSyncFrame();
+
+ return getAnimationFrame(graphic_info[graphic].anim_frames,
+ graphic_info[graphic].anim_delay,
+ graphic_info[graphic].anim_mode,
+ graphic_info[graphic].anim_start_frame,
+ sync_frame);
+}
+
+int getGraphicAnimationFrameXY(int graphic, int lx, int ly)
+{
+ if (graphic_info[graphic].anim_mode & ANIM_TILED)
+ {
+ struct GraphicInfo *g = &graphic_info[graphic];
+ int xsize = MAX(1, g->anim_frames_per_line);
+ int ysize = MAX(1, g->anim_frames / xsize);
+ int xoffset = g->anim_start_frame % xsize;
+ int yoffset = g->anim_start_frame % ysize;
+ // may be needed if screen field is significantly larger than playfield
+ int x = (lx + xoffset + SCR_FIELDX * xsize) % xsize;
+ int y = (ly + yoffset + SCR_FIELDY * ysize) % ysize;
+ int sync_frame = y * xsize + x;
+
+ return sync_frame % g->anim_frames;
+ }
+ else if (graphic_info[graphic].anim_mode & ANIM_RANDOM_STATIC)
+ {
+ struct GraphicInfo *g = &graphic_info[graphic];
+ // may be needed if screen field is significantly larger than playfield
+ int x = (lx + SCR_FIELDX * lev_fieldx) % lev_fieldx;
+ int y = (ly + SCR_FIELDY * lev_fieldy) % lev_fieldy;
+ int sync_frame = GfxRandomStatic[x][y];
+
+ return sync_frame % g->anim_frames;
+ }
+ else
+ {
+ int sync_frame = (IN_LEV_FIELD(lx, ly) ? GfxFrame[lx][ly] : -1);
+
+ return getGraphicAnimationFrame(graphic, sync_frame);
+ }
+}
+
+void getGraphicSourceBitmap(int graphic, int tilesize, Bitmap **bitmap)
+{
+ struct GraphicInfo *g = &graphic_info[graphic];
+ int tilesize_capped = MIN(MAX(1, tilesize), TILESIZE);
+
+ if (tilesize == gfx.standard_tile_size)
+ *bitmap = g->bitmaps[IMG_BITMAP_STANDARD];
+ else if (tilesize == game.tile_size)
+ *bitmap = g->bitmaps[IMG_BITMAP_PTR_GAME];
+ else
+ *bitmap = g->bitmaps[IMG_BITMAP_1x1 - log_2(tilesize_capped)];
+}
+
+void getGraphicSourceXY(int graphic, int frame, int *x, int *y,
+ boolean get_backside)
+{
+ struct GraphicInfo *g = &graphic_info[graphic];
+ int src_x = g->src_x + (get_backside ? g->offset2_x : 0);
+ int src_y = g->src_y + (get_backside ? g->offset2_y : 0);
+
+ if (g->offset_y == 0) // frames are ordered horizontally
+ {
+ int max_width = g->anim_frames_per_line * g->width;
+ int pos = (src_y / g->height) * max_width + src_x + frame * g->offset_x;
+
+ *x = pos % max_width;
+ *y = src_y % g->height + pos / max_width * g->height;
+ }
+ else if (g->offset_x == 0) // frames are ordered vertically
+ {
+ int max_height = g->anim_frames_per_line * g->height;
+ int pos = (src_x / g->width) * max_height + src_y + frame * g->offset_y;
+
+ *x = src_x % g->width + pos / max_height * g->width;
+ *y = pos % max_height;
+ }
+ else // frames are ordered diagonally
+ {
+ *x = src_x + frame * g->offset_x;
+ *y = src_y + frame * g->offset_y;
+ }
+}
+
+void getSizedGraphicSourceExt(int graphic, int frame, int tilesize,
+ Bitmap **bitmap, int *x, int *y,
+ boolean get_backside)
+{
+ struct GraphicInfo *g = &graphic_info[graphic];
+
+ // if no graphics defined at all, use fallback graphics
+ if (g->bitmaps == NULL)
+ *g = graphic_info[IMG_CHAR_EXCLAM];
+
+ // if no in-game graphics defined, always use standard graphic size
+ if (g->bitmaps[IMG_BITMAP_PTR_GAME] == NULL)
+ tilesize = TILESIZE;
+
+ getGraphicSourceBitmap(graphic, tilesize, bitmap);
+ getGraphicSourceXY(graphic, frame, x, y, get_backside);
+
+ *x = *x * tilesize / g->tile_size;
+ *y = *y * tilesize / g->tile_size;
+}
+
+void getSizedGraphicSource(int graphic, int frame, int tilesize,
+ Bitmap **bitmap, int *x, int *y)
+{
+ getSizedGraphicSourceExt(graphic, frame, tilesize, bitmap, x, y, FALSE);
+}
+
+void getFixedGraphicSource(int graphic, int frame,
+ Bitmap **bitmap, int *x, int *y)
+{
+ getSizedGraphicSourceExt(graphic, frame, TILESIZE, bitmap, x, y, FALSE);
+}
+
+void getMiniGraphicSource(int graphic, Bitmap **bitmap, int *x, int *y)
+{
+ getSizedGraphicSource(graphic, 0, MINI_TILESIZE, bitmap, x, y);
+}
+
+void getGlobalAnimGraphicSource(int graphic, int frame,
+ Bitmap **bitmap, int *x, int *y)
+{
+ struct GraphicInfo *g = &graphic_info[graphic];
+
+ // if no graphics defined at all, use fallback graphics
+ if (g->bitmaps == NULL)
+ *g = graphic_info[IMG_CHAR_EXCLAM];
+
+ // use original size graphics, if existing, else use standard size graphics
+ if (g->bitmaps[IMG_BITMAP_PTR_ORIGINAL])
+ *bitmap = g->bitmaps[IMG_BITMAP_PTR_ORIGINAL];
+ else
+ *bitmap = g->bitmaps[IMG_BITMAP_STANDARD];
+
+ getGraphicSourceXY(graphic, frame, x, y, FALSE);
+}
+
+static void getGraphicSourceExt(int graphic, int frame, Bitmap **bitmap,
+ int *x, int *y, boolean get_backside)
+{
+ getSizedGraphicSourceExt(graphic, frame, TILESIZE_VAR, bitmap, x, y,
+ get_backside);
+}
+
+void getGraphicSource(int graphic, int frame, Bitmap **bitmap, int *x, int *y)
+{
+ getGraphicSourceExt(graphic, frame, bitmap, x, y, FALSE);
+}
+
+void DrawGraphic(int x, int y, int graphic, int frame)
+{
+#if DEBUG
+ if (!IN_SCR_FIELD(x, y))
+ {
+ Debug("draw:DrawGraphic", "x = %d, y = %d, graphic = %d", x, y, graphic);
+ Debug("draw:DrawGraphic", "This should never happen!");
+
+ return;
+ }
+#endif
+
+ DrawGraphicExt(drawto_field, FX + x * TILEX_VAR, FY + y * TILEY_VAR, graphic,
+ frame);
+
+ MarkTileDirty(x, y);
+}
+
+void DrawFixedGraphic(int x, int y, int graphic, int frame)
+{
+#if DEBUG
+ if (!IN_SCR_FIELD(x, y))
+ {
+ Debug("draw:DrawFixedGraphic", "x = %d, y = %d, graphic = %d",
+ x, y, graphic);
+ Debug("draw:DrawFixedGraphic", "This should never happen!");
+
+ return;
+ }
+#endif
+
+ DrawFixedGraphicExt(drawto_field, FX + x * TILEX, FY + y * TILEY, graphic,
+ frame);
+ MarkTileDirty(x, y);
+}
+
+void DrawGraphicExt(DrawBuffer *dst_bitmap, int x, int y, int graphic,
+ int frame)
+{
+ Bitmap *src_bitmap;
+ int src_x, src_y;
+
+ getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
+
+ BlitBitmap(src_bitmap, dst_bitmap, src_x, src_y, TILEX_VAR, TILEY_VAR, x, y);
+}
+
+void DrawFixedGraphicExt(DrawBuffer *dst_bitmap, int x, int y, int graphic,
+ int frame)
+{
+ Bitmap *src_bitmap;
+ int src_x, src_y;
+
+ getFixedGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
+ BlitBitmap(src_bitmap, dst_bitmap, src_x, src_y, TILEX, TILEY, x, y);
+}
+
+void DrawGraphicThruMask(int x, int y, int graphic, int frame)
+{
+#if DEBUG
+ if (!IN_SCR_FIELD(x, y))
+ {
+ Debug("draw:DrawGraphicThruMask", "x = %d,y = %d, graphic = %d",
+ x, y, graphic);
+ Debug("draw:DrawGraphicThruMask", "This should never happen!");
+
+ return;
+ }
+#endif
+
+ DrawGraphicThruMaskExt(drawto_field, FX + x * TILEX_VAR, FY + y * TILEY_VAR,
+ graphic, frame);
+
+ MarkTileDirty(x, y);
+}
+
+void DrawFixedGraphicThruMask(int x, int y, int graphic, int frame)
+{
+#if DEBUG
+ if (!IN_SCR_FIELD(x, y))
+ {
+ Debug("draw:DrawFixedGraphicThruMask", "x = %d,y = %d, graphic = %d",
+ x, y, graphic);
+ Debug("draw:DrawFixedGraphicThruMask", "This should never happen!");
+
+ return;
+ }
+#endif
+
+ DrawFixedGraphicThruMaskExt(drawto_field, FX + x * TILEX, FY + y * TILEY,
+ graphic, frame);
+ MarkTileDirty(x, y);
+}
+
+void DrawGraphicThruMaskExt(DrawBuffer *d, int dst_x, int dst_y, int graphic,
+ int frame)
+{
+ Bitmap *src_bitmap;
+ int src_x, src_y;
+
+ getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
+
+ BlitBitmapMasked(src_bitmap, d, src_x, src_y, TILEX_VAR, TILEY_VAR,
+ dst_x, dst_y);
+}
+
+void DrawFixedGraphicThruMaskExt(DrawBuffer *d, int dst_x, int dst_y,
+ int graphic, int frame)
+{
+ Bitmap *src_bitmap;
+ int src_x, src_y;
+
+ getFixedGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
+
+ BlitBitmapMasked(src_bitmap, d, src_x, src_y, TILEX, TILEY,
+ dst_x, dst_y);
+}
+
+void DrawSizedGraphic(int x, int y, int graphic, int frame, int tilesize)
+{
+ DrawSizedGraphicExt(drawto, SX + x * tilesize, SY + y * tilesize, graphic,
+ frame, tilesize);
+ MarkTileDirty(x / tilesize, y / tilesize);
+}
+
+void DrawSizedGraphicThruMask(int x, int y, int graphic, int frame,
+ int tilesize)
+{
+ DrawSizedGraphicThruMaskExt(drawto, SX + x * tilesize, SY + y * tilesize,
+ graphic, frame, tilesize);
+ MarkTileDirty(x / tilesize, y / tilesize);
+}
+
+void DrawSizedGraphicExt(DrawBuffer *d, int x, int y, int graphic, int frame,
+ int tilesize)
+{
+ Bitmap *src_bitmap;
+ int src_x, src_y;
+
+ getSizedGraphicSource(graphic, frame, tilesize, &src_bitmap, &src_x, &src_y);
+ BlitBitmap(src_bitmap, d, src_x, src_y, tilesize, tilesize, x, y);
+}
+
+void DrawSizedGraphicThruMaskExt(DrawBuffer *d, int x, int y, int graphic,
+ int frame, int tilesize)
+{
+ Bitmap *src_bitmap;
+ int src_x, src_y;
+
+ getSizedGraphicSource(graphic, frame, tilesize, &src_bitmap, &src_x, &src_y);
+ BlitBitmapMasked(src_bitmap, d, src_x, src_y, tilesize, tilesize, x, y);
+}
+
+void DrawMiniGraphic(int x, int y, int graphic)
+{
+ DrawMiniGraphicExt(drawto, SX + x * MINI_TILEX,SY + y * MINI_TILEY, graphic);
+ MarkTileDirty(x / 2, y / 2);
+}
+
+void DrawMiniGraphicExt(DrawBuffer *d, int x, int y, int graphic)
+{
+ Bitmap *src_bitmap;
+ int src_x, src_y;
+
+ getMiniGraphicSource(graphic, &src_bitmap, &src_x, &src_y);
+ BlitBitmap(src_bitmap, d, src_x, src_y, MINI_TILEX, MINI_TILEY, x, y);
+}
+
+static void DrawGraphicShiftedNormal(int x, int y, int dx, int dy,
+ int graphic, int frame,
+ int cut_mode, int mask_mode)
+{
+ Bitmap *src_bitmap;
+ int src_x, src_y;
+ int dst_x, dst_y;
+ int width = TILEX, height = TILEY;
+ int cx = 0, cy = 0;
+
+ if (dx || dy) // shifted graphic
+ {
+ if (x < BX1) // object enters playfield from the left
+ {
+ x = BX1;
+ width = dx;
+ cx = TILEX - dx;
+ dx = 0;
+ }
+ else if (x > BX2) // object enters playfield from the right
+ {
+ x = BX2;
+ width = -dx;
+ dx = TILEX + dx;
+ }
+ else if (x == BX1 && dx < 0) // object leaves playfield to the left
+ {
+ width += dx;
+ cx = -dx;
+ dx = 0;
+ }
+ else if (x == BX2 && dx > 0) // object leaves playfield to the right
+ width -= dx;
+ else if (dx) // general horizontal movement
+ MarkTileDirty(x + SIGN(dx), y);
+
+ if (y < BY1) // object enters playfield from the top
+ {
+ if (cut_mode == CUT_BELOW) // object completely above top border
+ return;
+
+ y = BY1;
+ height = dy;
+ cy = TILEY - dy;
+ dy = 0;
+ }
+ else if (y > BY2) // object enters playfield from the bottom
+ {
+ y = BY2;
+ height = -dy;
+ dy = TILEY + dy;
+ }
+ else if (y == BY1 && dy < 0) // object leaves playfield to the top
+ {
+ height += dy;
+ cy = -dy;
+ dy = 0;
+ }
+ else if (dy > 0 && cut_mode == CUT_ABOVE)
+ {
+ if (y == BY2) // object completely above bottom border
+ return;
+
+ height = dy;
+ cy = TILEY - dy;
+ dy = TILEY;
+ MarkTileDirty(x, y + 1);
+ } // object leaves playfield to the bottom
+ else if (dy > 0 && (y == BY2 || cut_mode == CUT_BELOW))
+ height -= dy;
+ else if (dy) // general vertical movement
+ MarkTileDirty(x, y + SIGN(dy));
+ }
+
+#if DEBUG
+ if (!IN_SCR_FIELD(x, y))
+ {
+ Debug("draw:DrawGraphicShiftedNormal", "x = %d, y = %d, graphic = %d",
+ x, y, graphic);
+ Debug("draw:DrawGraphicShiftedNormal", "This should never happen!");
+
+ return;
+ }
+#endif
+
+ width = width * TILESIZE_VAR / TILESIZE;
+ height = height * TILESIZE_VAR / TILESIZE;
+ cx = cx * TILESIZE_VAR / TILESIZE;
+ cy = cy * TILESIZE_VAR / TILESIZE;
+ dx = dx * TILESIZE_VAR / TILESIZE;
+ dy = dy * TILESIZE_VAR / TILESIZE;
+
+ if (width > 0 && height > 0)
+ {
+ getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
+
+ src_x += cx;
+ src_y += cy;
+
+ dst_x = FX + x * TILEX_VAR + dx;
+ dst_y = FY + y * TILEY_VAR + dy;
+
+ if (mask_mode == USE_MASKING)
+ BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
+ dst_x, dst_y);
+ else
+ BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
+ dst_x, dst_y);
+
+ MarkTileDirty(x, y);
+ }
+}
+
+static void DrawGraphicShiftedDouble(int x, int y, int dx, int dy,
+ int graphic, int frame,
+ int cut_mode, int mask_mode)
+{
+ Bitmap *src_bitmap;
+ int src_x, src_y;
+ int dst_x, dst_y;
+ int width = TILEX_VAR, height = TILEY_VAR;
+ int x1 = x;
+ int y1 = y;
+ int x2 = x + SIGN(dx);
+ int y2 = y + SIGN(dy);
+
+ // movement with two-tile animations must be sync'ed with movement position,
+ // not with current GfxFrame (which can be higher when using slow movement)
+ int anim_pos = (dx ? ABS(dx) : ABS(dy));
+ int anim_frames = graphic_info[graphic].anim_frames;
+
+ // (we also need anim_delay here for movement animations with less frames)
+ int anim_delay = graphic_info[graphic].anim_delay;
+ int sync_frame = anim_pos * anim_frames * anim_delay / TILESIZE;
+
+ boolean draw_start_tile = (cut_mode != CUT_ABOVE); // only for falling!
+ boolean draw_end_tile = (cut_mode != CUT_BELOW); // only for falling!
+
+ // re-calculate animation frame for two-tile movement animation
+ frame = getGraphicAnimationFrame(graphic, sync_frame);
+
+ // check if movement start graphic inside screen area and should be drawn
+ if (draw_start_tile && IN_SCR_FIELD(x1, y1))
+ {
+ getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y, TRUE);
+
+ dst_x = FX + x1 * TILEX_VAR;
+ dst_y = FY + y1 * TILEY_VAR;
+
+ if (mask_mode == USE_MASKING)
+ BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
+ dst_x, dst_y);
+ else
+ BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
+ dst_x, dst_y);
+
+ MarkTileDirty(x1, y1);
+ }
+
+ // check if movement end graphic inside screen area and should be drawn
+ if (draw_end_tile && IN_SCR_FIELD(x2, y2))
+ {
+ getGraphicSourceExt(graphic, frame, &src_bitmap, &src_x, &src_y, FALSE);
+
+ dst_x = FX + x2 * TILEX_VAR;
+ dst_y = FY + y2 * TILEY_VAR;
+
+ if (mask_mode == USE_MASKING)
+ BlitBitmapMasked(src_bitmap, drawto_field, src_x, src_y, width, height,
+ dst_x, dst_y);
+ else
+ BlitBitmap(src_bitmap, drawto_field, src_x, src_y, width, height,
+ dst_x, dst_y);
+
+ MarkTileDirty(x2, y2);
+ }
+}
+
+static void DrawGraphicShifted(int x, int y, int dx, int dy,
+ int graphic, int frame,
+ int cut_mode, int mask_mode)
+{
+ if (graphic < 0)
+ {
+ DrawGraphic(x, y, graphic, frame);
+
+ return;
+ }
+
+ if (graphic_info[graphic].double_movement) // EM style movement images
+ DrawGraphicShiftedDouble(x, y, dx, dy, graphic, frame, cut_mode,mask_mode);
+ else
+ DrawGraphicShiftedNormal(x, y, dx, dy, graphic, frame, cut_mode,mask_mode);
+}
+
+static void DrawGraphicShiftedThruMask(int x, int y, int dx, int dy,
+ int graphic, int frame, int cut_mode)
+{
+ DrawGraphicShifted(x, y, dx, dy, graphic, frame, cut_mode, USE_MASKING);
+}
+
+void DrawScreenElementExt(int x, int y, int dx, int dy, int element,
+ int cut_mode, int mask_mode)
+{
+ int lx = LEVELX(x), ly = LEVELY(y);
+ int graphic;
+ int frame;
+
+ if (IN_LEV_FIELD(lx, ly))
+ {
+ if (element == EL_EMPTY)
+ element = GfxElementEmpty[lx][ly];
+
+ SetRandomAnimationValue(lx, ly);
+
+ graphic = el_act_dir2img(element, GfxAction[lx][ly], GfxDir[lx][ly]);
+ frame = getGraphicAnimationFrameXY(graphic, lx, ly);
+
+ // do not use double (EM style) movement graphic when not moving
+ if (graphic_info[graphic].double_movement && !dx && !dy)
+ {
+ graphic = el_act_dir2img(element, ACTION_DEFAULT, GfxDir[lx][ly]);
+ frame = getGraphicAnimationFrameXY(graphic, lx, ly);
+ }
+
+ if (game.use_masked_elements && (dx || dy))
+ mask_mode = USE_MASKING;
+ }
+ else // border element
+ {
+ graphic = el2img(element);
+ frame = getGraphicAnimationFrameXY(graphic, lx, ly);
+ }
+
+ if (element == EL_EXPANDABLE_WALL)
+ {
+ boolean left_stopped = FALSE, right_stopped = FALSE;
+
+ if (!IN_LEV_FIELD(lx - 1, ly) || IS_WALL(Tile[lx - 1][ly]))
+ left_stopped = TRUE;
+ if (!IN_LEV_FIELD(lx + 1, ly) || IS_WALL(Tile[lx + 1][ly]))
+ right_stopped = TRUE;
+
+ if (left_stopped && right_stopped)
+ graphic = IMG_WALL;
+ else if (left_stopped)
+ {
+ graphic = IMG_EXPANDABLE_WALL_GROWING_RIGHT;
+ frame = graphic_info[graphic].anim_frames - 1;
+ }
+ else if (right_stopped)
+ {
+ graphic = IMG_EXPANDABLE_WALL_GROWING_LEFT;
+ frame = graphic_info[graphic].anim_frames - 1;
+ }
+ }
+
+ if (dx || dy)
+ DrawGraphicShifted(x, y, dx, dy, graphic, frame, cut_mode, mask_mode);
+ else if (mask_mode == USE_MASKING)
+ DrawGraphicThruMask(x, y, graphic, frame);
+ else
+ DrawGraphic(x, y, graphic, frame);
+}
+
+void DrawLevelElementExt(int x, int y, int dx, int dy, int element,
+ int cut_mode, int mask_mode)
+{
+ if (IN_LEV_FIELD(x, y) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+ DrawScreenElementExt(SCREENX(x), SCREENY(y), dx, dy, element,
+ cut_mode, mask_mode);
+}
+
+void DrawScreenElementShifted(int x, int y, int dx, int dy, int element,
+ int cut_mode)
+{
+ DrawScreenElementExt(x, y, dx, dy, element, cut_mode, NO_MASKING);
+}
+
+void DrawLevelElementShifted(int x, int y, int dx, int dy, int element,
+ int cut_mode)
+{
+ DrawLevelElementExt(x, y, dx, dy, element, cut_mode, NO_MASKING);
+}
+
+void DrawLevelElementThruMask(int x, int y, int element)
+{
+ DrawLevelElementExt(x, y, 0, 0, element, NO_CUTTING, USE_MASKING);
+}
+
+void DrawLevelFieldThruMask(int x, int y)
+{
+ DrawLevelElementExt(x, y, 0, 0, Tile[x][y], NO_CUTTING, USE_MASKING);
+}
+
+// !!! implementation of quicksand is totally broken !!!
+#define IS_CRUMBLED_TILE(x, y, e) \
+ (GFX_CRUMBLED(e) && (!IN_LEV_FIELD(x, y) || \
+ !IS_MOVING(x, y) || \
+ (e) == EL_QUICKSAND_EMPTYING || \
+ (e) == EL_QUICKSAND_FAST_EMPTYING))
+
+static void DrawLevelFieldCrumbledInnerCorners(int x, int y, int dx, int dy,
+ int graphic)
+{
+ Bitmap *src_bitmap;
+ int src_x, src_y;
+ int width, height, cx, cy;
+ int sx = SCREENX(x), sy = SCREENY(y);
+ int crumbled_border_size = graphic_info[graphic].border_size;
+ int crumbled_tile_size = graphic_info[graphic].tile_size;
+ int crumbled_border_size_var =
+ crumbled_border_size * TILESIZE_VAR / crumbled_tile_size;
+ int i;
+
+ getGraphicSource(graphic, 0, &src_bitmap, &src_x, &src_y);
+
+ for (i = 1; i < 4; i++)
+ {
+ int dxx = (i & 1 ? dx : 0);
+ int dyy = (i & 2 ? dy : 0);
+ int xx = x + dxx;
+ int yy = y + dyy;
+ int element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
+ BorderElement);
+
+ // check if neighbour field is of same crumble type
+ boolean same = (IS_CRUMBLED_TILE(xx, yy, element) &&
+ graphic_info[graphic].class ==
+ graphic_info[el_act2crm(element, ACTION_DEFAULT)].class);
+
+ // return if check prevents inner corner
+ if (same == (dxx == dx && dyy == dy))
+ return;
+ }
+
+ // if we reach this point, we have an inner corner
+
+ getGraphicSource(graphic, 1, &src_bitmap, &src_x, &src_y);
+
+ width = crumbled_border_size_var;
+ height = crumbled_border_size_var;
+ cx = (dx > 0 ? TILESIZE_VAR - width : 0);
+ cy = (dy > 0 ? TILESIZE_VAR - height : 0);
+
+ if (game.use_masked_elements)
+ {
+ int graphic0 = el2img(EL_EMPTY);
+ int frame0 = getGraphicAnimationFrameXY(graphic0, x, y);
+ Bitmap *src_bitmap0;
+ int src_x0, src_y0;
+
+ getGraphicSource(graphic0, frame0, &src_bitmap0, &src_x0, &src_y0);
+
+ BlitBitmap(src_bitmap0, drawto_field, src_x0 + cx, src_y0 + cy,
+ width, height,
+ FX + sx * TILEX_VAR + cx, FY + sy * TILEY_VAR + cy);
+
+ BlitBitmapMasked(src_bitmap, drawto_field, src_x + cx, src_y + cy,
+ width, height,
+ FX + sx * TILEX_VAR + cx, FY + sy * TILEY_VAR + cy);
+ }
+ else
+ BlitBitmap(src_bitmap, drawto_field, src_x + cx, src_y + cy,
+ width, height,
+ FX + sx * TILEX_VAR + cx, FY + sy * TILEY_VAR + cy);
+}
+
+static void DrawLevelFieldCrumbledBorders(int x, int y, int graphic, int frame,
+ int dir)
+{
+ Bitmap *src_bitmap;
+ int src_x, src_y;
+ int width, height, bx, by, cx, cy;
+ int sx = SCREENX(x), sy = SCREENY(y);
+ int crumbled_border_size = graphic_info[graphic].border_size;
+ int crumbled_tile_size = graphic_info[graphic].tile_size;
+ int crumbled_border_size_var =
+ crumbled_border_size * TILESIZE_VAR / crumbled_tile_size;
+ int crumbled_border_pos_var = TILESIZE_VAR - crumbled_border_size_var;
+ int i;
+
+ getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
+
+ // only needed when using masked elements
+ int graphic0 = el2img(EL_EMPTY);
+ int frame0 = getGraphicAnimationFrameXY(graphic0, x, y);
+ Bitmap *src_bitmap0;
+ int src_x0, src_y0;
+
+ if (game.use_masked_elements)
+ getGraphicSource(graphic0, frame0, &src_bitmap0, &src_x0, &src_y0);
+
+ // draw simple, sloppy, non-corner-accurate crumbled border
+
+ width = (dir == 1 || dir == 2 ? crumbled_border_size_var : TILESIZE_VAR);
+ height = (dir == 0 || dir == 3 ? crumbled_border_size_var : TILESIZE_VAR);
+ cx = (dir == 2 ? crumbled_border_pos_var : 0);
+ cy = (dir == 3 ? crumbled_border_pos_var : 0);
+
+ if (game.use_masked_elements)
+ {
+ BlitBitmap(src_bitmap0, drawto_field, src_x0 + cx, src_y0 + cy,
+ width, height,
+ FX + sx * TILEX_VAR + cx,
+ FY + sy * TILEY_VAR + cy);
+
+ BlitBitmapMasked(src_bitmap, drawto_field, src_x + cx, src_y + cy,
+ width, height,
+ FX + sx * TILEX_VAR + cx,
+ FY + sy * TILEY_VAR + cy);
+ }
+ else
+ BlitBitmap(src_bitmap, drawto_field, src_x + cx, src_y + cy,
+ width, height,
+ FX + sx * TILEX_VAR + cx,
+ FY + sy * TILEY_VAR + cy);
+
+ // (remaining middle border part must be at least as big as corner part)
+ if (!(graphic_info[graphic].style & STYLE_ACCURATE_BORDERS) ||
+ crumbled_border_size_var >= TILESIZE_VAR / 3)
+ return;
+
+ // correct corners of crumbled border, if needed
+
+ for (i = -1; i <= 1; i += 2)
+ {
+ int xx = x + (dir == 0 || dir == 3 ? i : 0);
+ int yy = y + (dir == 1 || dir == 2 ? i : 0);
+ int element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
+ BorderElement);
+
+ // check if neighbour field is of same crumble type
+ if (IS_CRUMBLED_TILE(xx, yy, element) &&
+ graphic_info[graphic].class ==
+ graphic_info[el_act2crm(element, ACTION_DEFAULT)].class)
+ {
+ // no crumbled corner, but continued crumbled border
+
+ int c1 = (dir == 2 || dir == 3 ? crumbled_border_pos_var : 0);
+ int c2 = (i == 1 ? crumbled_border_pos_var : 0);
+ int b1 = (i == 1 ? crumbled_border_size_var :
+ TILESIZE_VAR - 2 * crumbled_border_size_var);
+
+ width = crumbled_border_size_var;
+ height = crumbled_border_size_var;
+
+ if (dir == 1 || dir == 2)
+ {
+ cx = c1;
+ cy = c2;
+ bx = cx;
+ by = b1;
+ }
+ else
+ {
+ cx = c2;
+ cy = c1;
+ bx = b1;
+ by = cy;
+ }
+
+ if (game.use_masked_elements)
+ {
+ BlitBitmap(src_bitmap0, drawto_field, src_x0 + bx, src_y0 + by,
+ width, height,
+ FX + sx * TILEX_VAR + cx,
+ FY + sy * TILEY_VAR + cy);
+
+ BlitBitmapMasked(src_bitmap, drawto_field, src_x + bx, src_y + by,
+ width, height,
+ FX + sx * TILEX_VAR + cx,
+ FY + sy * TILEY_VAR + cy);
+ }
+ else
+ BlitBitmap(src_bitmap, drawto_field, src_x + bx, src_y + by,
+ width, height,
+ FX + sx * TILEX_VAR + cx,
+ FY + sy * TILEY_VAR + cy);
+ }
+ }
+}
+
+static void DrawLevelFieldCrumbledExt(int x, int y, int graphic, int frame)
+{
+ int sx = SCREENX(x), sy = SCREENY(y);
+ int element;
+ int i;
+ struct XY *xy = xy_topdown;
+
+ if (!IN_LEV_FIELD(x, y))
+ return;
+
+ element = TILE_GFX_ELEMENT(x, y);
+
+ if (IS_CRUMBLED_TILE(x, y, element)) // crumble field itself
+ {
+ if (!IN_SCR_FIELD(sx, sy))
+ return;
+
+ // crumble field borders towards direct neighbour fields
+ for (i = 0; i < 4; i++)
+ {
+ int xx = x + xy[i].x;
+ int yy = y + xy[i].y;
+
+ element = (IN_LEV_FIELD(xx, yy) ? TILE_GFX_ELEMENT(xx, yy) :
+ BorderElement);
+
+ // check if neighbour field is of same crumble type
+ if (IS_CRUMBLED_TILE(xx, yy, element) &&
+ graphic_info[graphic].class ==
+ graphic_info[el_act2crm(element, ACTION_DEFAULT)].class)
+ continue;
+
+ DrawLevelFieldCrumbledBorders(x, y, graphic, frame, i);
+ }
+
+ // crumble inner field corners towards corner neighbour fields
+ if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
+ graphic_info[graphic].anim_frames == 2)
+ {
+ for (i = 0; i < 4; i++)
+ {
+ int dx = (i & 1 ? +1 : -1);
+ int dy = (i & 2 ? +1 : -1);
+
+ DrawLevelFieldCrumbledInnerCorners(x, y, dx, dy, graphic);
+ }
+ }
+
+ MarkTileDirty(sx, sy);
+ }
+ else // center field is not crumbled -- crumble neighbour fields
+ {
+ // crumble field borders of direct neighbour fields
+ for (i = 0; i < 4; i++)
+ {
+ int xx = x + xy[i].x;
+ int yy = y + xy[i].y;
+ int sxx = sx + xy[i].x;
+ int syy = sy + xy[i].y;
+
+ if (!IN_LEV_FIELD(xx, yy) ||
+ !IN_SCR_FIELD(sxx, syy))
+ continue;
+
+ // do not crumble fields that are being digged or snapped
+ if (Tile[xx][yy] == EL_EMPTY ||
+ Tile[xx][yy] == EL_ELEMENT_SNAPPING)
+ continue;
+
+ element = TILE_GFX_ELEMENT(xx, yy);
+
+ if (!IS_CRUMBLED_TILE(xx, yy, element))
+ continue;
+
+ graphic = el_act2crm(element, ACTION_DEFAULT);
+
+ DrawLevelFieldCrumbledBorders(xx, yy, graphic, 0, 3 - i);
+
+ MarkTileDirty(sxx, syy);
+ }
+
+ // crumble inner field corners of corner neighbour fields
+ for (i = 0; i < 4; i++)
+ {
+ int dx = (i & 1 ? +1 : -1);
+ int dy = (i & 2 ? +1 : -1);
+ int xx = x + dx;
+ int yy = y + dy;
+ int sxx = sx + dx;
+ int syy = sy + dy;
+
+ if (!IN_LEV_FIELD(xx, yy) ||
+ !IN_SCR_FIELD(sxx, syy))
+ continue;
+
+ if (Tile[xx][yy] == EL_ELEMENT_SNAPPING)
+ continue;
+
+ element = TILE_GFX_ELEMENT(xx, yy);
+
+ if (!IS_CRUMBLED_TILE(xx, yy, element))
+ continue;
+
+ graphic = el_act2crm(element, ACTION_DEFAULT);
+
+ if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
+ graphic_info[graphic].anim_frames == 2)
+ DrawLevelFieldCrumbledInnerCorners(xx, yy, -dx, -dy, graphic);
+
+ MarkTileDirty(sxx, syy);
+ }
+ }
+}
+
+void DrawLevelFieldCrumbled(int x, int y)
+{
+ int graphic;
+
+ if (!IN_LEV_FIELD(x, y))
+ return;
+
+ if (Tile[x][y] == EL_ELEMENT_SNAPPING &&
+ GfxElement[x][y] != EL_UNDEFINED &&
+ GFX_CRUMBLED(GfxElement[x][y]))
+ {
+ DrawLevelFieldCrumbledDigging(x, y, GfxDir[x][y], GfxFrame[x][y]);
+
+ return;
+ }
+
+ graphic = el_act2crm(TILE_GFX_ELEMENT(x, y), ACTION_DEFAULT);
+
+ DrawLevelFieldCrumbledExt(x, y, graphic, 0);
+}
+
+void DrawLevelFieldCrumbledDigging(int x, int y, int direction,
+ int step_frame)
+{
+ int graphic1 = el_act_dir2img(GfxElement[x][y], ACTION_DIGGING, direction);
+ int graphic2 = el_act_dir2crm(GfxElement[x][y], ACTION_DIGGING, direction);
+ int frame1 = getGraphicAnimationFrame(graphic1, step_frame);
+ int frame2 = getGraphicAnimationFrame(graphic2, step_frame);
+ int sx = SCREENX(x), sy = SCREENY(y);
+
+ DrawScreenGraphic(sx, sy, graphic1, frame1);
+ DrawLevelFieldCrumbledExt(x, y, graphic2, frame2);
+}
+
+void DrawLevelFieldCrumbledNeighbours(int x, int y)
+{
+ int sx = SCREENX(x), sy = SCREENY(y);
+ struct XY *xy = xy_topdown;
+ int i;
+
+ // crumble direct neighbour fields (required for field borders)
+ for (i = 0; i < 4; i++)
+ {
+ int xx = x + xy[i].x;
+ int yy = y + xy[i].y;
+ int sxx = sx + xy[i].x;
+ int syy = sy + xy[i].y;
+
+ if (!IN_LEV_FIELD(xx, yy) ||
+ !IN_SCR_FIELD(sxx, syy) ||
+ !GFX_CRUMBLED(Tile[xx][yy]) ||
+ IS_MOVING(xx, yy))
+ continue;
+
+ DrawLevelField(xx, yy);
+ }
+
+ // crumble corner neighbour fields (required for inner field corners)
+ for (i = 0; i < 4; i++)
+ {
+ int dx = (i & 1 ? +1 : -1);
+ int dy = (i & 2 ? +1 : -1);
+ int xx = x + dx;
+ int yy = y + dy;
+ int sxx = sx + dx;
+ int syy = sy + dy;
+
+ if (!IN_LEV_FIELD(xx, yy) ||
+ !IN_SCR_FIELD(sxx, syy) ||
+ !GFX_CRUMBLED(Tile[xx][yy]) ||
+ IS_MOVING(xx, yy))
+ continue;
+
+ int element = TILE_GFX_ELEMENT(xx, yy);
+ int graphic = el_act2crm(element, ACTION_DEFAULT);
+
+ if ((graphic_info[graphic].style & STYLE_INNER_CORNERS) &&
+ graphic_info[graphic].anim_frames == 2)
+ DrawLevelField(xx, yy);
+ }
+}
+
+static int getBorderElement(int x, int y)
+{
+ int border[7][2] =
+ {
+ { EL_STEELWALL_TOPLEFT, EL_INVISIBLE_STEELWALL_TOPLEFT },
+ { EL_STEELWALL_TOPRIGHT, EL_INVISIBLE_STEELWALL_TOPRIGHT },
+ { EL_STEELWALL_BOTTOMLEFT, EL_INVISIBLE_STEELWALL_BOTTOMLEFT },
+ { EL_STEELWALL_BOTTOMRIGHT, EL_INVISIBLE_STEELWALL_BOTTOMRIGHT },
+ { EL_STEELWALL_VERTICAL, EL_INVISIBLE_STEELWALL_VERTICAL },
+ { EL_STEELWALL_HORIZONTAL, EL_INVISIBLE_STEELWALL_HORIZONTAL },
+ { EL_STEELWALL, EL_INVISIBLE_STEELWALL }
+ };
+ int steel_type = (BorderElement == EL_STEELWALL ? 0 : 1);
+ int steel_position = (x == -1 && y == -1 ? 0 :
+ x == lev_fieldx && y == -1 ? 1 :
+ x == -1 && y == lev_fieldy ? 2 :
+ x == lev_fieldx && y == lev_fieldy ? 3 :
+ x == -1 || x == lev_fieldx ? 4 :
+ y == -1 || y == lev_fieldy ? 5 : 6);
+
+ return border[steel_position][steel_type];
+}
+
+void DrawScreenGraphic(int x, int y, int graphic, int frame)
+{
+ if (game.use_masked_elements)
+ {
+ if (graphic != el2img(EL_EMPTY))
+ DrawScreenElementExt(x, y, 0, 0, EL_EMPTY, NO_CUTTING, NO_MASKING);
+
+ DrawGraphicThruMask(x, y, graphic, frame);
+ }
+ else
+ {
+ DrawGraphic(x, y, graphic, frame);
+ }
+}
+
+void DrawLevelGraphic(int x, int y, int graphic, int frame)
+{
+ DrawScreenGraphic(SCREENX(x), SCREENY(y), graphic, frame);
+}
+
+void DrawScreenElement(int x, int y, int element)
+{
+ int mask_mode = NO_MASKING;
+
+ if (game.use_masked_elements)
+ {
+ int lx = LEVELX(x), ly = LEVELY(y);
+
+ if (IN_LEV_FIELD(lx, ly) && element != EL_EMPTY)
+ {
+ DrawScreenElementExt(x, y, 0, 0, EL_EMPTY, NO_CUTTING, NO_MASKING);
+
+ mask_mode = USE_MASKING;
+ }
+ }
+
+ DrawScreenElementExt(x, y, 0, 0, element, NO_CUTTING, mask_mode);
+ DrawLevelFieldCrumbled(LEVELX(x), LEVELY(y));
+}
+
+void DrawLevelElement(int x, int y, int element)
+{
+ if (IN_LEV_FIELD(x, y) && IN_SCR_FIELD(SCREENX(x), SCREENY(y)))
+ DrawScreenElement(SCREENX(x), SCREENY(y), element);
+}
+
+void DrawScreenField(int x, int y)
+{
+ int lx = LEVELX(x), ly = LEVELY(y);
+ int element, content;
+
+ if (!IN_LEV_FIELD(lx, ly))
+ {
+ if (lx < -1 || lx > lev_fieldx || ly < -1 || ly > lev_fieldy)
+ element = EL_EMPTY;
+ else
+ element = getBorderElement(lx, ly);
+
+ DrawScreenElement(x, y, element);
+
+ return;
+ }
+
+ element = Tile[lx][ly];
+ content = Store[lx][ly];
+
+ if (IS_MOVING(lx, ly))
+ {
+ int horiz_move = (MovDir[lx][ly] == MV_LEFT || MovDir[lx][ly] == MV_RIGHT);
+ boolean cut_mode = NO_CUTTING;
+
+ if (element == EL_QUICKSAND_EMPTYING ||
+ element == EL_QUICKSAND_FAST_EMPTYING ||
+ element == EL_MAGIC_WALL_EMPTYING ||
+ element == EL_BD_MAGIC_WALL_EMPTYING ||
+ element == EL_DC_MAGIC_WALL_EMPTYING ||
+ element == EL_AMOEBA_DROPPING)
+ cut_mode = CUT_ABOVE;
+ else if (element == EL_QUICKSAND_FILLING ||
+ element == EL_QUICKSAND_FAST_FILLING ||
+ element == EL_MAGIC_WALL_FILLING ||
+ element == EL_BD_MAGIC_WALL_FILLING ||
+ element == EL_DC_MAGIC_WALL_FILLING)
+ cut_mode = CUT_BELOW;
+
+ if (cut_mode == CUT_ABOVE)
+ DrawScreenElement(x, y, element);
+ else