+#define CB_AREA_TO_BRUSH 0
+#define CB_BRUSH_TO_CURSOR 1
+#define CB_BRUSH_TO_LEVEL 2
+#define CB_DELETE_OLD_CURSOR 3
+#define CB_DUMP_BRUSH 4
+#define CB_DUMP_BRUSH_SMALL 5
+#define CB_CLIPBOARD_TO_BRUSH 6
+#define CB_BRUSH_TO_CLIPBOARD 7
+#define CB_BRUSH_TO_CLIPBOARD_SMALL 8
+#define CB_UPDATE_BRUSH_POSITION 9
+#define CB_FLIP_BRUSH_X 10
+#define CB_FLIP_BRUSH_Y 11
+#define CB_FLIP_BRUSH_XY 12
+
+#define MAX_CB_PART_SIZE 10
+#define MAX_CB_LINE_SIZE (MAX_LEV_FIELDX + 1) // text plus newline
+#define MAX_CB_NUM_LINES (MAX_LEV_FIELDY)
+#define MAX_CB_TEXT_SIZE (MAX_CB_LINE_SIZE * \
+ MAX_CB_NUM_LINES * \
+ MAX_CB_PART_SIZE)
+
+static int getFlippedTileExt(int map[], int element)
+{
+ int i;
+
+ for (i = 0; map[i] != -1; i++)
+ if (map[i] == element)
+ return map[i ^ 1]; // get flipped element by flipping LSB of index
+
+ return element;
+}
+
+static int getFlippedTileX(int element)
+{
+ int map[] =
+ {
+ EL_BD_BUTTERFLY_LEFT, EL_BD_BUTTERFLY_RIGHT,
+ EL_BD_FIREFLY_LEFT, EL_BD_FIREFLY_RIGHT,
+ EL_BUG_LEFT, EL_BUG_RIGHT,
+ EL_SPACESHIP_LEFT, EL_SPACESHIP_RIGHT,
+ EL_PACMAN_LEFT, EL_PACMAN_RIGHT,
+ EL_ARROW_LEFT, EL_ARROW_RIGHT,
+ EL_MOLE_LEFT, EL_MOLE_RIGHT,
+ EL_BALLOON_SWITCH_LEFT, EL_BALLOON_SWITCH_RIGHT,
+ EL_YAMYAM_LEFT, EL_YAMYAM_RIGHT,
+ EL_SP_PORT_LEFT, EL_SP_PORT_RIGHT,
+ EL_SP_GRAVITY_PORT_LEFT, EL_SP_GRAVITY_PORT_RIGHT,
+ EL_SP_GRAVITY_ON_PORT_LEFT, EL_SP_GRAVITY_ON_PORT_RIGHT,
+ EL_SP_GRAVITY_OFF_PORT_LEFT, EL_SP_GRAVITY_OFF_PORT_RIGHT,
+ EL_CONVEYOR_BELT_1_LEFT, EL_CONVEYOR_BELT_1_RIGHT,
+ EL_CONVEYOR_BELT_2_LEFT, EL_CONVEYOR_BELT_2_RIGHT,
+ EL_CONVEYOR_BELT_3_LEFT, EL_CONVEYOR_BELT_3_RIGHT,
+ EL_CONVEYOR_BELT_4_LEFT, EL_CONVEYOR_BELT_4_RIGHT,
+ EL_SPRING_LEFT, EL_SPRING_RIGHT,
+ EL_SP_CHIP_LEFT, EL_SP_CHIP_RIGHT,
+ EL_TUBE_VERTICAL_LEFT, EL_TUBE_VERTICAL_RIGHT,
+ EL_TUBE_LEFT_UP, EL_TUBE_RIGHT_UP,
+ EL_TUBE_LEFT_DOWN, EL_TUBE_RIGHT_DOWN,
+ EL_DC_STEELWALL_1_LEFT, EL_DC_STEELWALL_1_RIGHT,
+ EL_DC_STEELWALL_1_TOPLEFT, EL_DC_STEELWALL_1_TOPRIGHT,
+ EL_DC_STEELWALL_1_BOTTOMLEFT, EL_DC_STEELWALL_1_BOTTOMRIGHT,
+ EL_DC_STEELWALL_1_TOPLEFT_2, EL_DC_STEELWALL_1_TOPRIGHT_2,
+ EL_DC_STEELWALL_1_BOTTOMLEFT_2, EL_DC_STEELWALL_1_BOTTOMRIGHT_2,
+ EL_DC_STEELWALL_2_LEFT, EL_DC_STEELWALL_2_RIGHT,
+ EL_ACID_POOL_TOPLEFT, EL_ACID_POOL_TOPRIGHT,
+ EL_ACID_POOL_BOTTOMLEFT, EL_ACID_POOL_BOTTOMRIGHT,
+
+ -1
+ };
+
+ return getFlippedTileExt(map, element);
+}
+
+static int getFlippedTileY(int element)
+{
+ int map[] =
+ {
+ EL_BD_BUTTERFLY_UP, EL_BD_BUTTERFLY_DOWN,
+ EL_BD_FIREFLY_UP, EL_BD_FIREFLY_DOWN,
+ EL_BUG_UP, EL_BUG_DOWN,
+ EL_SPACESHIP_UP, EL_SPACESHIP_DOWN,
+ EL_PACMAN_UP, EL_PACMAN_DOWN,
+ EL_ARROW_UP, EL_ARROW_DOWN,
+ EL_MOLE_UP, EL_MOLE_DOWN,
+ EL_BALLOON_SWITCH_UP, EL_BALLOON_SWITCH_DOWN,
+ EL_YAMYAM_UP, EL_YAMYAM_DOWN,
+ EL_SP_PORT_UP, EL_SP_PORT_DOWN,
+ EL_SP_GRAVITY_PORT_UP, EL_SP_GRAVITY_PORT_DOWN,
+ EL_SP_GRAVITY_ON_PORT_UP, EL_SP_GRAVITY_ON_PORT_DOWN,
+ EL_SP_GRAVITY_OFF_PORT_UP, EL_SP_GRAVITY_OFF_PORT_DOWN,
+ EL_SP_CHIP_TOP, EL_SP_CHIP_BOTTOM,
+ EL_TUBE_HORIZONTAL_UP, EL_TUBE_HORIZONTAL_DOWN,
+ EL_TUBE_LEFT_UP, EL_TUBE_LEFT_DOWN,
+ EL_TUBE_RIGHT_UP, EL_TUBE_RIGHT_DOWN,
+ EL_DC_STEELWALL_1_TOP, EL_DC_STEELWALL_1_BOTTOM,
+ EL_DC_STEELWALL_1_TOPLEFT, EL_DC_STEELWALL_1_BOTTOMLEFT,
+ EL_DC_STEELWALL_1_TOPRIGHT, EL_DC_STEELWALL_1_BOTTOMRIGHT,
+ EL_DC_STEELWALL_1_TOPLEFT_2, EL_DC_STEELWALL_1_BOTTOMLEFT_2,
+ EL_DC_STEELWALL_1_TOPRIGHT_2, EL_DC_STEELWALL_1_BOTTOMRIGHT_2,
+ EL_DC_STEELWALL_2_TOP, EL_DC_STEELWALL_2_BOTTOM,
+ EL_EMC_WALL_1, EL_EMC_WALL_3,
+
+ -1
+ };
+
+ return getFlippedTileExt(map, element);
+}
+
+static int getFlippedTileXY(int element)
+{
+ int map[] =
+ {
+ EL_BD_BUTTERFLY_LEFT, EL_BD_BUTTERFLY_UP,
+ EL_BD_BUTTERFLY_RIGHT, EL_BD_BUTTERFLY_DOWN,
+ EL_BD_FIREFLY_LEFT, EL_BD_FIREFLY_UP,
+ EL_BD_FIREFLY_RIGHT, EL_BD_FIREFLY_DOWN,
+ EL_BUG_LEFT, EL_BUG_UP,
+ EL_BUG_RIGHT, EL_BUG_DOWN,
+ EL_SPACESHIP_LEFT, EL_SPACESHIP_UP,
+ EL_SPACESHIP_RIGHT, EL_SPACESHIP_DOWN,
+ EL_PACMAN_LEFT, EL_PACMAN_UP,
+ EL_PACMAN_RIGHT, EL_PACMAN_DOWN,
+ EL_ARROW_LEFT, EL_ARROW_UP,
+ EL_ARROW_RIGHT, EL_ARROW_DOWN,
+ EL_MOLE_LEFT, EL_MOLE_UP,
+ EL_MOLE_RIGHT, EL_MOLE_DOWN,
+ EL_BALLOON_SWITCH_LEFT, EL_BALLOON_SWITCH_UP,
+ EL_BALLOON_SWITCH_RIGHT, EL_BALLOON_SWITCH_DOWN,
+ EL_YAMYAM_LEFT, EL_YAMYAM_UP,
+ EL_YAMYAM_RIGHT, EL_YAMYAM_DOWN,
+ EL_SP_PORT_LEFT, EL_SP_PORT_UP,
+ EL_SP_PORT_RIGHT, EL_SP_PORT_DOWN,
+ EL_SP_GRAVITY_PORT_LEFT, EL_SP_GRAVITY_PORT_UP,
+ EL_SP_GRAVITY_PORT_RIGHT, EL_SP_GRAVITY_PORT_DOWN,
+ EL_SP_GRAVITY_ON_PORT_LEFT, EL_SP_GRAVITY_ON_PORT_UP,
+ EL_SP_GRAVITY_ON_PORT_RIGHT, EL_SP_GRAVITY_ON_PORT_DOWN,
+ EL_SP_GRAVITY_OFF_PORT_LEFT, EL_SP_GRAVITY_OFF_PORT_UP,
+ EL_SP_GRAVITY_OFF_PORT_RIGHT, EL_SP_GRAVITY_OFF_PORT_DOWN,
+ EL_SP_CHIP_LEFT, EL_SP_CHIP_TOP,
+ EL_SP_CHIP_RIGHT, EL_SP_CHIP_BOTTOM,
+ EL_TUBE_VERTICAL, EL_TUBE_HORIZONTAL,
+ EL_TUBE_VERTICAL_LEFT, EL_TUBE_HORIZONTAL_UP,
+ EL_TUBE_VERTICAL_RIGHT, EL_TUBE_HORIZONTAL_DOWN,
+ EL_TUBE_LEFT_DOWN, EL_TUBE_RIGHT_UP,
+ EL_DC_STEELWALL_1_LEFT, EL_DC_STEELWALL_1_TOP,
+ EL_DC_STEELWALL_1_RIGHT, EL_DC_STEELWALL_1_BOTTOM,
+ EL_DC_STEELWALL_1_HORIZONTAL, EL_DC_STEELWALL_1_VERTICAL,
+ EL_DC_STEELWALL_1_TOPRIGHT, EL_DC_STEELWALL_1_BOTTOMLEFT,
+ EL_DC_STEELWALL_1_TOPRIGHT_2, EL_DC_STEELWALL_1_BOTTOMLEFT_2,
+ EL_DC_STEELWALL_2_LEFT, EL_DC_STEELWALL_2_TOP,
+ EL_DC_STEELWALL_2_RIGHT, EL_DC_STEELWALL_2_BOTTOM,
+ EL_DC_STEELWALL_2_HORIZONTAL, EL_DC_STEELWALL_2_VERTICAL,
+ EL_EXPANDABLE_WALL_HORIZONTAL, EL_EXPANDABLE_WALL_VERTICAL,
+ EL_EXPANDABLE_STEELWALL_HORIZONTAL, EL_EXPANDABLE_STEELWALL_VERTICAL,
+
+ -1
+ };
+
+ return getFlippedTileExt(map, element);
+}
+
+static int getFlippedTile(int element, int mode)
+{
+ if (IS_MM_ELEMENT(element))
+ {
+ // get MM game element
+ element = map_element_RND_to_MM(element);
+
+ // get flipped game element
+ element = (mode == CB_FLIP_BRUSH_X ? getFlippedTileX_MM(element) :
+ mode == CB_FLIP_BRUSH_Y ? getFlippedTileY_MM(element) :
+ mode == CB_FLIP_BRUSH_XY ? getFlippedTileXY_MM(element) :
+ element);
+
+ // get RND game element again
+ element = map_element_MM_to_RND(element);
+ }
+ else
+ {
+ // get flipped game element
+ element = (mode == CB_FLIP_BRUSH_X ? getFlippedTileX(element) :
+ mode == CB_FLIP_BRUSH_Y ? getFlippedTileY(element) :
+ mode == CB_FLIP_BRUSH_XY ? getFlippedTileXY(element) :
+ element);
+ }
+
+ return element;
+}
+
+static void SwapFlippedTiles(short *tile1, short *tile2, int mode)
+{
+ // flip tiles
+ short tile1_flipped = getFlippedTile(*tile1, mode);
+ short tile2_flipped = getFlippedTile(*tile2, mode);
+
+ // swap tiles
+ *tile1 = tile2_flipped;
+ *tile2 = tile1_flipped;
+}