cairo/matrix.go
func (m *Matrix) TransformPoint(x, y float64) (float64, float64) {
	C.cairo_matrix_transform_point(m.native(),
		(*C.double)(unsafe.Pointer(&x)), (*C.double)(unsafe.Pointer(&y)))
	return x, y
}
func (m *Matrix) TransformPoint(x, y float64) (float64, float64) {
	C.cairo_matrix_transform_point(m.native(),
		(*C.double)(unsafe.Pointer(&x)), (*C.double)(unsafe.Pointer(&y)))
	return x, y
}
// TransformPoint ...