Index: trunk/src/board.c
===================================================================
--- trunk/src/board.c	(revision 11698)
+++ trunk/src/board.c	(revision 11699)
@@ -321,7 +321,6 @@
 int pcb_board_normalize(pcb_board_t *pcb)
 {
 	pcb_box_t b;
-	pcb_coord_t dx = 0, dy = 0;
 	int chg = 0;
 	
 	if (pcb_data_bbox(&b, pcb->Data) == NULL)
@@ -337,15 +336,7 @@
 		chg++;
 	}
 
-	if (b.X1 < 0)
-		dx = -b.X1;
-	if (b.Y1 < 0)
-		dy = -b.Y1;
+	chg += pcb_data_normalize_(pcb->Data, &b);
 
-	if ((dx > 0) || (dy > 0)) {
-		pcb_data_move(pcb->Data, dx, dy);
-		chg++;
-	}
-
 	return chg;
 }
Index: trunk/src/data.c
===================================================================
--- trunk/src/data.c	(revision 11698)
+++ trunk/src/data.c	(revision 11699)
@@ -434,6 +434,36 @@
 	PCB_ENDALL_LOOP;
 }
 
+int pcb_data_normalize_(pcb_data_t *data, pcb_box_t *data_bbox)
+{
+	pcb_box_t tmp;
+	pcb_coord_t dx = 0, dy = 0;
+
+	if (data_bbox == NULL) {
+		data_bbox = &tmp;
+		if (pcb_data_bbox(data_bbox, data) == NULL)
+			return -1;
+	}
+
+	if (data_bbox->X1 < 0)
+		dx = -data_bbox->X1;
+	if (data_bbox->Y1 < 0)
+		dy = -data_bbox->Y1;
+
+	if ((dx > 0) || (dy > 0)) {
+		pcb_data_move(data, dx, dy);
+		return 1;
+	}
+
+	return 0;
+}
+
+int pcb_data_normalize(pcb_data_t *data)
+{
+	return pcb_data_normalize_(data, NULL);
+}
+
+
 extern pcb_opfunc_t MoveFunctions;
 void pcb_data_move(pcb_data_t *data, pcb_coord_t dx, pcb_coord_t dy)
 {
Index: trunk/src/data.h
===================================================================
--- trunk/src/data.h	(revision 11698)
+++ trunk/src/data.h	(revision 11699)
@@ -130,7 +130,12 @@
 /* Set up all data layers as bound layers to pcb's Data */
 void pcb_data_bind_board_layers(pcb_board_t *pcb, pcb_data_t *data, int share_rtrees);
 
+/* Make sure there are no negative coords in data, knowing the bbox of the data */
+int pcb_data_normalize_(pcb_data_t *data, pcb_box_t *data_bbox);
 
+/* Make sure there are no negative coords in data (calculates the bbox of the data) */
+int pcb_data_normalize(pcb_data_t *data);
+
 /* Returns the top level pcb related to a data, or NULL if the data is floating
    (e.g. is a global buffer) */
 pcb_board_t *pcb_data_get_top(pcb_data_t *data);