The whole point of vector graphics is to encode resolution-independent graphics, the concept of pixel is meaningless in this context. Normally you just encode "draw circle at position C, radius R", and then just use whatever graphics API you have to draw said circle at the resolution you want (possibly with anti-aliasing).

Or maybe I'm misunderstanding the question...

The whole point of vector graphics is to encode resolution-independent graphics, the concept of pixel is meaningless in this context. Normally you just encode "draw circle at position C, radius R", and then just use whatever graphics API you have to draw said circle at the resolution you want.

Or maybe I'm misunderstanding the question...