+ 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);
+
+#if NEW_TILESIZE
+ width = crumbled_border_size * TILESIZE_VAR / TILESIZE;
+ height = crumbled_border_size * TILESIZE_VAR / TILESIZE;
+ cx = (dx > 0 ? TILEX - crumbled_border_size : 0) * TILESIZE_VAR / TILESIZE;
+ cy = (dy > 0 ? TILEY - crumbled_border_size : 0) * TILESIZE_VAR / TILESIZE;
+
+ BlitBitmap(src_bitmap, drawto_field, src_x + cx, src_y + cy,
+ width, height, FX + sx * TILEX_VAR + cx, FY + sy * TILEY_VAR + cy);
+#else
+ width = crumbled_border_size;
+ height = crumbled_border_size;
+ cx = (dx > 0 ? TILEX - crumbled_border_size : 0);
+ cy = (dy > 0 ? TILEY - crumbled_border_size : 0);
+
+ BlitBitmap(src_bitmap, drawto_field, src_x + cx, src_y + cy,
+ width, height, FX + sx * TILEX + cx, FY + sy * TILEY + cy);
+#endif
+}
+
+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 i;
+
+ getGraphicSource(graphic, frame, &src_bitmap, &src_x, &src_y);
+
+ /* draw simple, sloppy, non-corner-accurate crumbled border */
+
+#if 1
+ width = (dir == 1 || dir == 2 ? crumbled_border_size : TILEX);
+ height = (dir == 0 || dir == 3 ? crumbled_border_size : TILEY);
+ cx = (dir == 2 ? TILEX - crumbled_border_size : 0);
+ cy = (dir == 3 ? TILEY - crumbled_border_size : 0);
+#else
+ if (dir == 1 || dir == 2) /* left or right crumbled border */
+ {
+ width = crumbled_border_size;
+ height = TILEY;
+ cx = (dir == 2 ? TILEX - crumbled_border_size : 0);
+ cy = 0;
+ }
+ else /* top or bottom crumbled border */
+ {
+ width = TILEX;
+ height = crumbled_border_size;
+ cx = 0;
+ cy = (dir == 3 ? TILEY - crumbled_border_size : 0);
+ }
+#endif
+
+#if NEW_TILESIZE
+ BlitBitmap(src_bitmap, drawto_field,
+ src_x + cx * TILESIZE_VAR / TILESIZE,
+ src_y + cy * TILESIZE_VAR / TILESIZE,
+ width * TILESIZE_VAR / TILESIZE,
+ height * TILESIZE_VAR / TILESIZE,
+ FX + sx * TILEX_VAR + cx * TILESIZE_VAR / TILESIZE,
+ FY + sy * TILEY_VAR + cy * TILESIZE_VAR / TILESIZE);
+#else
+ BlitBitmap(src_bitmap, drawto_field, src_x + cx, src_y + cy,
+ width, height, FX + sx * TILEX + cx, FY + sy * TILEY + cy);
+#endif
+
+ /* (remaining middle border part must be at least as big as corner part) */
+ if (!(graphic_info[graphic].style & STYLE_ACCURATE_BORDERS) ||
+ crumbled_border_size >= TILESIZE / 3)
+ return;
+
+ /* correct corners of crumbled border, if needed */
+
+#if 1
+ 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 ? TILESIZE - crumbled_border_size : 0);
+ int c2 = (i == 1 ? TILESIZE - crumbled_border_size : 0);
+ int b1 = (i == 1 ? crumbled_border_size :
+ TILESIZE - 2 * crumbled_border_size);
+
+ width = crumbled_border_size;
+ height = crumbled_border_size;
+
+ if (dir == 1 || dir == 2)
+ {
+ cx = c1;
+ cy = c2;
+ bx = cx;
+ by = b1;
+ }
+ else
+ {
+ cx = c2;
+ cy = c1;
+ bx = b1;
+ by = cy;
+ }
+
+#if NEW_TILESIZE
+ BlitBitmap(src_bitmap, drawto_field,
+ src_x + bx * TILESIZE_VAR / TILESIZE,
+ src_y + by * TILESIZE_VAR / TILESIZE,
+ width * TILESIZE_VAR / TILESIZE,
+ height * TILESIZE_VAR / TILESIZE,
+ FX + sx * TILEX_VAR + cx * TILESIZE_VAR / TILESIZE,
+ FY + sy * TILEY_VAR + cy * TILESIZE_VAR / TILESIZE);
+#else
+ BlitBitmap(src_bitmap, drawto_field, src_x + bx, src_y + by,
+ width, height, FX + sx * TILEX + cx, FY + sy * TILEY + cy);
+#endif
+ }
+ }
+#else
+ if (dir == 1 || dir == 2) /* left or right crumbled border */
+ {
+ for (i = -1; i <= 1; i+=2)
+ {
+ int xx = x;
+ int yy = y + i;
+ 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 */
+
+ width = crumbled_border_size;
+ height = crumbled_border_size;
+ cx = (dir == 2 ? TILEX - crumbled_border_size : 0);
+ cy = (i == 1 ? TILEY - crumbled_border_size : 0);
+ bx = cx;
+ by = (i == 1 ? crumbled_border_size :
+ TILEY - 2 * crumbled_border_size);
+
+ BlitBitmap(src_bitmap, drawto_field, src_x + bx, src_y + by,
+ width, height, FX + sx * TILEX + cx, FY + sy * TILEY + cy);
+ }
+ }
+ }
+ else /* top or bottom crumbled border */
+ {
+ for (i = -1; i <= 1; i+=2)
+ {
+ int xx = x + i;
+ int yy = y;
+ 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 */
+
+ width = crumbled_border_size;
+ height = crumbled_border_size;
+ cx = (i == 1 ? TILEX - crumbled_border_size : 0);
+ cy = (dir == 3 ? TILEY - crumbled_border_size : 0);
+ bx = (i == 1 ? crumbled_border_size :
+ TILEX - 2 * crumbled_border_size);
+ by = cy;
+
+ BlitBitmap(src_bitmap, drawto_field, src_x + bx, src_y + by,
+ width, height, FX + sx * TILEX + cx, FY + sy * TILEY + cy);
+ }
+ }
+ }
+#endif
+}
+
+static void DrawLevelFieldCrumbledExt(int x, int y, int graphic, int frame)
+{
+ int sx = SCREENX(x), sy = SCREENY(y);
+ int element;
+ int i;