516 	int16 wide_squared, deep_squared;  in draw_ellipse()  local
522 	deep_squared = deep * deep;  in draw_ellipse()
523 	d = deep_squared - (wide_squared*deep) + (wide_squared/4);  in draw_ellipse()
526 	while((wide_squared*(y - 0.5)) > (deep_squared*(x + 1)))  in draw_ellipse()
529 			d += deep_squared*(2*x + 3);  in draw_ellipse()
532 			d += deep_squared*(2*x + 3) + wide_squared*(-2*y + 2);  in draw_ellipse()
539 	d = deep_squared*((x+0.5)*(x+0.5)) + wide_squared*((y-1)*(y-1)) - deep_squared*wide_squared;  in draw_ellipse()
544 			d += deep_squared*(2*x + 2) + wide_squared*(-2*y + 3);  in draw_ellipse()
569 	int16 wide_squared, deep_squared;  in fill_ellipse()  local
575 	deep_squared = deep * deep;  in fill_ellipse()
576 	d = deep_squared - (wide_squared*deep) + (wide_squared/4);  in fill_ellipse()
579 	while((wide_squared*(y - 0.5)) > (deep_squared*(x + 1)))  in fill_ellipse()
582 			d += deep_squared*(2*x + 3);  in fill_ellipse()
585 			d += deep_squared*(2*x + 3) + wide_squared*(-2*y + 2);  in fill_ellipse()
592 	d = deep_squared*((x+0.5)*(x+0.5)) + wide_squared*((y-1)*(y-1)) - deep_squared*wide_squared;  in fill_ellipse()
597 			d += deep_squared*(2*x + 2) + wide_squared*(-2*y + 3);  in fill_ellipse()