Index: trunk/src/hid_cam.c
===================================================================
--- trunk/src/hid_cam.c	(revision 27415)
+++ trunk/src/hid_cam.c	(revision 27416)
@@ -476,7 +476,13 @@
 	return dst->exported_grps;
 }
 
+void pcb_cam_nolayer(pcb_board_t *pcb, const char *src, const char **fn_out)
+{
+	if (src != NULL)
+		*fn_out = src;
+}
 
+
 typedef struct  {
 	pcb_cam_t *cam;
 	const pcb_layergrp_t *grp;
Index: trunk/src/hid_cam.h
===================================================================
--- trunk/src/hid_cam.h	(revision 27415)
+++ trunk/src/hid_cam.h	(revision 27416)
@@ -34,7 +34,11 @@
    the number of layer groups exported */
 int pcb_cam_end(pcb_cam_t *dst);
 
+/* load *fn_out with the cam-requested output file name in cam mode; useful
+   for non layer based exporters */
+void pcb_cam_nolayer(pcb_board_t *pcb, const char *src, const char **fn_out);
 
+
 /* Shall be the first rule in a cam capable exporter's set_layer_group()
    callback: decides not to draw a layer group in cam mode if the
    group is not scheduled for export */