Index: trunk/src/global_typedefs.h
===================================================================
--- trunk/src/global_typedefs.h	(revision 12076)
+++ trunk/src/global_typedefs.h	(revision 12077)
@@ -42,6 +42,7 @@
 
 typedef struct pcb_polygon_s pcb_polygon_t;
 typedef struct pcb_pad_s pcb_pad_t;
+typedef struct pcb_padstack_s pcb_padstack_t;
 typedef struct pcb_pin_s pcb_pin_t;
 typedef struct pcb_rtree_s pcb_rtree_t;
 typedef struct pcb_rtree_it_s pcb_rtree_it_t;
Index: trunk/src/obj_padstack.c
===================================================================
--- trunk/src/obj_padstack.c	(revision 12076)
+++ trunk/src/obj_padstack.c	(revision 12077)
@@ -21,3 +21,5 @@
  */
 
 #include "config.h"
+
+#include "obj_padstack.h"
Index: trunk/src/obj_padstack.h
===================================================================
--- trunk/src/obj_padstack.h	(revision 12076)
+++ trunk/src/obj_padstack.h	(revision 12077)
@@ -0,0 +1,64 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  pcb-rnd, interactive printed circuit board design
+ *  Copyright (C) 2017 Tibor 'Igor2' Palinkas
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#ifndef PCB_OBJ_PADSTACK_H
+#define PCB_OBJ_PADSTACK_H
+
+#include "obj_common.h"
+#include "layer.h"
+
+typedef struct pcb_padstack_poly_s {
+	unsigned int len;             /* number of points in polygon */
+	pcb_point_t *pt;              /* ordered list of points */
+	pcb_polyarea_t *pa;           /* cache for the poly code */
+} pcb_padstack_poly_t;
+
+typedef struct pcb_padstack_shape_s {
+	pcb_layer_type_t layer_mask;
+	pcb_layer_combining_t comb;
+	union {
+		pcb_padstack_poly_t poly;
+		pcb_coord_t dia;             /* diameter of the filled circle */
+	} data;
+	pcb_coord_t clearance;         /* per layer clearance: internal layer clearance is sometimes different for production or insulation reasons (IPC2221A) */
+	unsigned is_poly:1;            /* either poly or filled circle */
+} pcb_padstack_shape_t;
+
+struct pcb_padstack_proto_s {
+	pcb_coord_t hdia;              /* if > 0, diameter of the hole (else there's no hole) */
+	int htop, hbottom;             /* if hdia > 0, determine the hole's span, counted in copper layers from the top or bottom copper layer */
+
+	unsigned char len;             /* number of shapes */
+	pcb_padstack_shape_t *shapes;  /* list of layer-shape pairs */
+} pcb_padstack_proto_t;
+
+struct pcb_padstack_s {
+	PCB_ANYOBJECTFIELDS;
+	pcb_cardinal_t proto;          /* reference to a pcb_padstack_proto_t within pcb_data_t */
+	pcb_coord_t x, y;
+	struct {
+		int used;
+		char *shape;                 /* indexed by layer ID */
+	} thermal;
+};
+
+#endif