diff --git a/qad/graphic/graphic.cpp b/qad/graphic/graphic.cpp
index 61a3601..c53be95 100644
--- a/qad/graphic/graphic.cpp
+++ b/qad/graphic/graphic.cpp
@@ -1299,6 +1299,22 @@ double Graphic::real2canvasY(double py) const {
 }
 
 
+QPolygonF Graphic::real2canvas(const QPolygonF & real_polygon) const {
+	QPolygonF ret;
+	for (int i=0; i<real_polygon.size(); ++i)
+		ret << real2canvas(real_polygon[i]);
+	return ret;
+}
+
+
+QPolygonF Graphic::canvas2real(const QPolygonF & canvas_polygon) const {
+	QPolygonF ret;
+	for (int i=0; i<canvas_polygon.size(); ++i)
+		ret << canvas2real(canvas_polygon[i]);
+	return ret;
+}
+
+
 void Graphic::setCurrentAction(GraphicAction action) {
 	curaction = action;
 	switch (action) {
diff --git a/qad/graphic/graphic.h b/qad/graphic/graphic.h
index a78bfa2..55bf1aa 100644
--- a/qad/graphic/graphic.h
+++ b/qad/graphic/graphic.h
@@ -208,6 +208,8 @@ public:
 	double real2canvasY(double py) const;
 	QPointF canvas2real(QPointF canvas_point) const {return QPointF(canvas2realX(canvas_point.x()), canvas2realY(canvas_point.y()));}
 	QPointF real2canvas(QPointF real_point) const {return QPointF(real2canvasX(real_point.x()), real2canvasY(real_point.y()));}
+	QPolygonF real2canvas(const QPolygonF & real_polygon) const;
+	QPolygonF canvas2real(const QPolygonF & canvas_polygon) const;
 	double getScaleX() const {return real2canvasX(1.) - real2canvasX(0.);}
 	double getScaleY() const {return real2canvasY(1.) - real2canvasY(0.);}
 	QPointF getScale() const {return QPointF(getScaleX(), getScaleY());}