Index: trunk/src/buffer.c
===================================================================
--- trunk/src/buffer.c	(revision 5327)
+++ trunk/src/buffer.c	(revision 5328)
@@ -403,38 +403,22 @@
 	Buffer->Y = PCB_SWAP_Y(Buffer->Y);
 	PCB_VIA_LOOP(Buffer->Data);
 	{
-		via->X = PCB_SWAP_X(via->X);
-		via->Y = PCB_SWAP_Y(via->Y);
+		pcb_via_mirror(Buffer->Data, via);
 	}
 	PCB_END_LOOP;
 	PCB_LINE_ALL_LOOP(Buffer->Data);
 	{
-		line->Point1.X = PCB_SWAP_X(line->Point1.X);
-		line->Point1.Y = PCB_SWAP_Y(line->Point1.Y);
-		line->Point2.X = PCB_SWAP_X(line->Point2.X);
-		line->Point2.Y = PCB_SWAP_Y(line->Point2.Y);
+		pcb_line_mirror(layer, line);
 	}
 	PCB_ENDALL_LOOP;
 	PCB_ARC_ALL_LOOP(Buffer->Data);
 	{
-		pcb_r_delete_entry(layer->arc_tree, (pcb_box_t *) arc);
-		arc->X = PCB_SWAP_X(arc->X);
-		arc->Y = PCB_SWAP_Y(arc->Y);
-		arc->StartAngle = PCB_SWAP_ANGLE(arc->StartAngle);
-		arc->Delta = PCB_SWAP_DELTA(arc->Delta);
-		pcb_arc_bbox(arc);
-		pcb_r_insert_entry(layer->arc_tree, (pcb_box_t *) arc, 0);
+		pcb_arc_mirror(layer, arc);
 	}
 	PCB_ENDALL_LOOP;
 	PCB_POLY_ALL_LOOP(Buffer->Data);
 	{
-		PCB_POLY_POINT_LOOP(polygon);
-		{
-			point->X = PCB_SWAP_X(point->X);
-			point->Y = PCB_SWAP_Y(point->Y);
-		}
-		PCB_END_LOOP;
-		pcb_poly_bbox(polygon);
+		pcb_poly_mirror(layer, polygon);
 	}
 	PCB_ENDALL_LOOP;
 	pcb_set_buffer_bbox(Buffer);
Index: trunk/src/obj_arc.c
===================================================================
--- trunk/src/obj_arc.c	(revision 5327)
+++ trunk/src/obj_arc.c	(revision 5328)
@@ -598,6 +598,18 @@
 	pcb_r_insert_entry(layer->arc_tree, (pcb_box_t *) arc, 0);
 }
 
+void pcb_arc_mirror(pcb_layer_t *layer, pcb_arc_t *arc)
+{
+	pcb_r_delete_entry(layer->arc_tree, (pcb_box_t *) arc);
+	arc->X = PCB_SWAP_X(arc->X);
+	arc->Y = PCB_SWAP_Y(arc->Y);
+	arc->StartAngle = PCB_SWAP_ANGLE(arc->StartAngle);
+	arc->Delta = PCB_SWAP_DELTA(arc->Delta);
+	pcb_arc_bbox(arc);
+	pcb_r_insert_entry(layer->arc_tree, (pcb_box_t *) arc, 0);
+}
+
+
 /* rotates an arc */
 void *Rotate90Arc(pcb_opctx_t *ctx, pcb_layer_t *Layer, pcb_arc_t *Arc)
 {
Index: trunk/src/obj_arc.h
===================================================================
--- trunk/src/obj_arc.h	(revision 5327)
+++ trunk/src/obj_arc.h	(revision 5328)
@@ -56,6 +56,7 @@
 void pcb_arc_bbox(pcb_arc_t *Arc);
 void pcb_arc_rotate90(pcb_arc_t *Arc, pcb_coord_t X, pcb_coord_t Y, unsigned Number);
 void pcb_arc_rotate(pcb_layer_t *layer, pcb_arc_t *arc, pcb_coord_t X, pcb_coord_t Y, double cosa, double sina, pcb_angle_t angle);
+void pcb_arc_mirror(pcb_layer_t *layer, pcb_arc_t *arc);
 
 /*** hash ***/
 int pcb_arc_eq(const pcb_element_t *e1, const pcb_arc_t *a1, const pcb_element_t *e2, const pcb_arc_t *a2);
Index: trunk/src/obj_line.c
===================================================================
--- trunk/src/obj_line.c	(revision 5327)
+++ trunk/src/obj_line.c	(revision 5328)
@@ -684,6 +684,15 @@
 	pcb_r_insert_entry(layer->line_tree, (pcb_box_t *) line, 0);
 }
 
+void pcb_line_mirror(pcb_layer_t *layer, pcb_line_t *line)
+{
+	line->Point1.X = PCB_SWAP_X(line->Point1.X);
+	line->Point1.Y = PCB_SWAP_Y(line->Point1.Y);
+	line->Point2.X = PCB_SWAP_X(line->Point2.X);
+	line->Point2.Y = PCB_SWAP_Y(line->Point2.Y);
+}
+
+
 static void rotate_line1(pcb_layer_t *Layer, pcb_line_t *Line)
 {
 	EraseLine(Line);
Index: trunk/src/obj_line.h
===================================================================
--- trunk/src/obj_line.h	(revision 5327)
+++ trunk/src/obj_line.h	(revision 5328)
@@ -60,6 +60,7 @@
 void pcb_line_bbox(pcb_line_t *Line);
 void pcb_line_rotate90(pcb_line_t *Line, pcb_coord_t X, pcb_coord_t Y, unsigned Number);
 void pcb_line_rotate(pcb_layer_t *layer, pcb_line_t *line, pcb_coord_t X, pcb_coord_t Y, double cosa, double sina);
+void pcb_line_mirror(pcb_layer_t *layer, pcb_line_t *line);
 
 pcb_coord_t pcb_line_length(const pcb_line_t *line);
 pcb_coord_t pcb_line_area(const pcb_line_t *line);
Index: trunk/src/obj_pinvia.c
===================================================================
--- trunk/src/obj_pinvia.c	(revision 5327)
+++ trunk/src/obj_pinvia.c	(revision 5328)
@@ -238,6 +238,11 @@
 	pcb_r_insert_entry(Data->via_tree, (pcb_box_t *) Via, 0);
 }
 
+void pcb_via_mirror(pcb_data_t *Data, pcb_pin_t *via)
+{
+	via->X = PCB_SWAP_X(via->X);
+	via->Y = PCB_SWAP_Y(via->Y);
+}
 
 int pcb_pin_eq(const pcb_element_t *e1, const pcb_pin_t *p1, const pcb_element_t *e2, const pcb_pin_t *p2)
 {
Index: trunk/src/obj_pinvia.h
===================================================================
--- trunk/src/obj_pinvia.h	(revision 5327)
+++ trunk/src/obj_pinvia.h	(revision 5328)
@@ -53,6 +53,7 @@
 void pcb_pin_bbox(pcb_pin_t *Pin);
 
 void pcb_via_rotate(pcb_data_t *Data, pcb_pin_t *Via, pcb_coord_t X, pcb_coord_t Y, double cosa, double sina);
+void pcb_via_mirror(pcb_data_t *Data, pcb_pin_t *Via);
 
 /* hash */
 int pcb_pin_eq(const pcb_element_t *e1, const pcb_pin_t *p1, const pcb_element_t *e2, const pcb_pin_t *p2);
Index: trunk/src/obj_poly.c
===================================================================
--- trunk/src/obj_poly.c	(revision 5327)
+++ trunk/src/obj_poly.c	(revision 5328)
@@ -140,6 +140,16 @@
 	pcb_r_insert_entry(layer->polygon_tree, (pcb_box_t *) polygon, 0);
 }
 
+void pcb_poly_mirror(pcb_layer_t *layer, pcb_polygon_t *polygon)
+{
+	PCB_POLY_POINT_LOOP(polygon);
+	{
+		point->X = PCB_SWAP_X(point->X);
+		point->Y = PCB_SWAP_Y(point->Y);
+	}
+	PCB_END_LOOP;
+	pcb_poly_bbox(polygon);
+}
 
 /* sets the bounding box of a polygons */
 void pcb_poly_bbox(pcb_polygon_t *Polygon)
Index: trunk/src/obj_poly.h
===================================================================
--- trunk/src/obj_poly.h	(revision 5327)
+++ trunk/src/obj_poly.h	(revision 5328)
@@ -63,6 +63,7 @@
 
 void pcb_poly_rotate90(pcb_polygon_t *Polygon, pcb_coord_t X, pcb_coord_t Y, unsigned Number);
 void pcb_poly_rotate(pcb_layer_t *layer, pcb_polygon_t *poly, pcb_coord_t X, pcb_coord_t Y, double cosa, double sina);
+void pcb_poly_mirror(pcb_layer_t *layer, pcb_polygon_t *polygon);
 
 void pcb_poly_move(pcb_polygon_t *Polygon, pcb_coord_t DX, pcb_coord_t DY);
 pcb_polygon_t *pcb_poly_copy(pcb_polygon_t *Dest, pcb_polygon_t *Src);