int BC_XvImage::write_drawable(Drawable &pixmap, GC &gc,
int source_x, int source_y, int source_w, int source_h,
int dest_x, int dest_y, int dest_w, int dest_h)
int BC_XvImage::write_drawable(Drawable &pixmap, GC &gc,
int source_x, int source_y, int source_w, int source_h,
int dest_x, int dest_y, int dest_w, int dest_h)