[Bug 421] Implement a DIB engine

http://bugs.winehq.org/show_bug.cgi?id=421

--- Comment #374 from el   2010-05-26 14:51:00 ---
Looking at your patch it can be seen that it is impossible for this algorithm
to draw an ellipse that is an even number of pixels high. You always draw a
certain distance below and above the center and the center is a signed integer,
e.g. it sits directly on a pixel. Thus you always draw an odd number of lines.