Drawing option constants

DRAW_OPT_CLEAR DRAW_OPT_CLEAR_EXCEPT_STATUS_SCREEN DRAW_OPT_CLEAR_PIXELS DRAW_OPT_CLEAR_SCREEN_MODES DRAW_OPT_CLEAR_WHOLE_SCREEN DRAW_OPT_FILL_SHAPE DRAW_OPT_INVERT DRAW_OPT_LOGICAL_AND DRAW_OPT_LOGICAL_COPY DRAW_OPT_LOGICAL_OPERATIONS DRAW_OPT_LOGICAL_OR DRAW_OPT_LOGICAL_XOR DRAW_OPT_NORMAL DRAW_OPT_POLYGON_POLYLINE

#define DRAW_OPT_LOGICAL_XOR   (0x0018) Draw pixels using a logical XOR operation