The question is: is there any way to receive set of points describing
an outline of given glyph instead of a set of rules and control points
describing the bezier functions, from which outline is composed of?
Freetype does it internally, but I don't think it is worth and
reasonable to try to use these intrinsics. They can change at any time
with new versions, and you can spend more time on finding how to use
them that you would spend to write your own implementation. There is
plenty of resources on the web.