Convert a quadratic bezier to a cubic one
From https://fontforge.org/docs/techref/bezier.html#converting-truetype-to-postscript: Any quadratic spline can be expressed as a cubic (where the cubic term is zero). The end points of the cubic will be the same as the quadratic’s. CP0 = QP0 CP3 = QP2 The two control points for the cubic are: CP1 = QP0 + 2/3 *(QP1-QP0) CP2 = QP2 + 2/3 … Read more