rotate by quaternion (q, w)

returns number of contours

note: this routine clips fills that extend off the edges... ideally this wouldn't happen, but it could happen if the truetype glyph bounding boxes are

tesselate until threshhold p is happy... @TODO warped to compensate for non-linear stretching

align an unsigned value to a power of two

aligns the z axis along the vector

creates a vector given an angle measured clockwise from horizontal (1,0)