Index: trunk/src/buffer.c
===================================================================
--- trunk/src/buffer.c	(revision 9773)
+++ trunk/src/buffer.c	(revision 9774)
@@ -441,7 +441,7 @@
 	/* set buffer offset to 'mark' position */
 	Buffer->X = PCB_SWAP_X(Buffer->X);
 	Buffer->Y = PCB_SWAP_Y(Buffer->Y);
-	pcb_data_mirror(Buffer->Data);
+	pcb_data_mirror(Buffer->Data, 0);
 	pcb_set_buffer_bbox(Buffer);
 }
 
Index: trunk/src/data.c
===================================================================
--- trunk/src/data.c	(revision 9773)
+++ trunk/src/data.c	(revision 9774)
@@ -404,26 +404,26 @@
 	return NULL;
 }
 
-void pcb_data_mirror(pcb_data_t *data)
+void pcb_data_mirror(pcb_data_t *data, pcb_coord_t y_offs)
 {
 	PCB_VIA_LOOP(data);
 	{
-		pcb_via_mirror(data, via);
+		pcb_via_mirror(data, via, y_offs);
 	}
 	PCB_END_LOOP;
 	PCB_LINE_ALL_LOOP(data);
 	{
-		pcb_line_mirror(layer, line);
+		pcb_line_mirror(layer, line, y_offs);
 	}
 	PCB_ENDALL_LOOP;
 	PCB_ARC_ALL_LOOP(data);
 	{
-		pcb_arc_mirror(layer, arc);
+		pcb_arc_mirror(layer, arc, y_offs);
 	}
 	PCB_ENDALL_LOOP;
 	PCB_POLY_ALL_LOOP(data);
 	{
-		pcb_poly_mirror(layer, polygon);
+		pcb_poly_mirror(layer, polygon, y_offs);
 	}
 	PCB_ENDALL_LOOP;
 }
Index: trunk/src/data.h
===================================================================
--- trunk/src/data.h	(revision 9773)
+++ trunk/src/data.h	(revision 9774)
@@ -136,7 +136,7 @@
 pcb_board_t *pcb_data_get_top(pcb_data_t *data);
 
 
-void pcb_data_mirror(pcb_data_t *data);
+void pcb_data_mirror(pcb_data_t *data, pcb_coord_t y_offs);
 
 
 #endif
Index: trunk/src/obj_arc.c
===================================================================
--- trunk/src/obj_arc.c	(revision 9773)
+++ trunk/src/obj_arc.c	(revision 9774)
@@ -642,11 +642,11 @@
 	pcb_r_insert_entry(layer->arc_tree, (pcb_box_t *) arc, 0);
 }
 
-void pcb_arc_mirror(pcb_layer_t *layer, pcb_arc_t *arc)
+void pcb_arc_mirror(pcb_layer_t *layer, pcb_arc_t *arc, pcb_coord_t y_offs)
 {
 	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->Y = PCB_SWAP_Y(arc->Y) + y_offs;
 	arc->StartAngle = PCB_SWAP_ANGLE(arc->StartAngle);
 	arc->Delta = PCB_SWAP_DELTA(arc->Delta);
 	pcb_arc_bbox(arc);
Index: trunk/src/obj_arc.h
===================================================================
--- trunk/src/obj_arc.h	(revision 9773)
+++ trunk/src/obj_arc.h	(revision 9774)
@@ -58,7 +58,7 @@
 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);
+void pcb_arc_mirror(pcb_layer_t *layer, pcb_arc_t *arc, pcb_coord_t y_offs);
 void pcb_arc_flip_side(pcb_layer_t *layer, pcb_arc_t *arc);
 pcb_box_t pcb_arc_mini_bbox(const pcb_arc_t *arc);
 
Index: trunk/src/obj_line.c
===================================================================
--- trunk/src/obj_line.c	(revision 9773)
+++ trunk/src/obj_line.c	(revision 9774)
@@ -744,13 +744,13 @@
 	pcb_r_insert_entry(layer->line_tree, (pcb_box_t *) line, 0);
 }
 
-void pcb_line_mirror(pcb_layer_t *layer, pcb_line_t *line)
+void pcb_line_mirror(pcb_layer_t *layer, pcb_line_t *line, pcb_coord_t y_offs)
 {
 	pcb_r_delete_entry(layer->line_tree, (pcb_box_t *) line);
 	line->Point1.X = PCB_SWAP_X(line->Point1.X);
-	line->Point1.Y = PCB_SWAP_Y(line->Point1.Y);
+	line->Point1.Y = PCB_SWAP_Y(line->Point1.Y) + y_offs;
 	line->Point2.X = PCB_SWAP_X(line->Point2.X);
-	line->Point2.Y = PCB_SWAP_Y(line->Point2.Y);
+	line->Point2.Y = PCB_SWAP_Y(line->Point2.Y) + y_offs;
 	pcb_line_bbox(line);
 	pcb_r_insert_entry(layer->line_tree, (pcb_box_t *) line, 0);
 }
Index: trunk/src/obj_line.h
===================================================================
--- trunk/src/obj_line.h	(revision 9773)
+++ trunk/src/obj_line.h	(revision 9774)
@@ -62,7 +62,7 @@
 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);
+void pcb_line_mirror(pcb_layer_t *layer, pcb_line_t *line, pcb_coord_t y_offs);
 void pcb_line_flip_side(pcb_layer_t *layer, pcb_line_t *line);
 
 pcb_coord_t pcb_line_length(const pcb_line_t *line);
Index: trunk/src/obj_pinvia.c
===================================================================
--- trunk/src/obj_pinvia.c	(revision 9773)
+++ trunk/src/obj_pinvia.c	(revision 9774)
@@ -281,10 +281,10 @@
 	pcb_r_insert_entry(Data->via_tree, (pcb_box_t *) Via, 0);
 }
 
-void pcb_via_mirror(pcb_data_t *Data, pcb_pin_t *via)
+void pcb_via_mirror(pcb_data_t *Data, pcb_pin_t *via, pcb_coord_t y_offs)
 {
 	via->X = PCB_SWAP_X(via->X);
-	via->Y = PCB_SWAP_Y(via->Y);
+	via->Y = PCB_SWAP_Y(via->Y) + y_offs;
 }
 
 void pcb_via_flip_side(pcb_data_t *Data, pcb_pin_t *via)
Index: trunk/src/obj_pinvia.h
===================================================================
--- trunk/src/obj_pinvia.h	(revision 9773)
+++ trunk/src/obj_pinvia.h	(revision 9774)
@@ -59,7 +59,7 @@
 
 
 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);
+void pcb_via_mirror(pcb_data_t *Data, pcb_pin_t *Via, pcb_coord_t y_offs);
 void pcb_via_flip_side(pcb_data_t *Data, pcb_pin_t *via);
 
 /* hash */
Index: trunk/src/obj_poly.c
===================================================================
--- trunk/src/obj_poly.c	(revision 9773)
+++ trunk/src/obj_poly.c	(revision 9774)
@@ -145,13 +145,13 @@
 	pcb_r_insert_entry(layer->polygon_tree, (pcb_box_t *) polygon, 0);
 }
 
-void pcb_poly_mirror(pcb_layer_t *layer, pcb_polygon_t *polygon)
+void pcb_poly_mirror(pcb_layer_t *layer, pcb_polygon_t *polygon, pcb_coord_t y_offs)
 {
 	pcb_r_delete_entry(layer->polygon_tree, (pcb_box_t *)polygon);
 	PCB_POLY_POINT_LOOP(polygon);
 	{
 		point->X = PCB_SWAP_X(point->X);
-		point->Y = PCB_SWAP_Y(point->Y);
+		point->Y = PCB_SWAP_Y(point->Y) + y_offs;
 	}
 	PCB_END_LOOP;
 	pcb_poly_bbox(polygon);
Index: trunk/src/obj_poly.h
===================================================================
--- trunk/src/obj_poly.h	(revision 9773)
+++ trunk/src/obj_poly.h	(revision 9774)
@@ -65,7 +65,7 @@
 
 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_mirror(pcb_layer_t *layer, pcb_polygon_t *polygon, pcb_coord_t y_offs);
 void pcb_poly_flip_side(pcb_layer_t *layer, pcb_polygon_t *polygon);
 
 void pcb_poly_move(pcb_polygon_t *Polygon, pcb_coord_t DX, pcb_coord_t DY);