+ 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);