op/clip: export Path's current pen position

Signed-off-by: Sebastien Binet <s@sbinet.org>

op/clip/clip.go

@@ -28,6 +28,9 @@ type Path struct {
 	start   f32.Point
 }
 
+// Pos returns the current pen position.
+func (p *Path) Pos() f32.Point { return p.pen }
+
 // Op sets the current clip to the intersection of
 // the existing clip with this clip.
 //