Index: trunk/src/hid.h
===================================================================
--- trunk/src/hid.h	(revision 25200)
+++ trunk/src/hid.h	(revision 25201)
@@ -270,7 +270,7 @@
 	   functions.  In addition to the copper layer groups, you may select virtual
 	   layers. The is_empty argument is a hint - if set, the layer is empty, if
 	   zero it may be non-empty. */
-	int (*set_layer_group)(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform);
+	int (*set_layer_group)(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform);
 
 	/* Tell the GUI the layer last selected has been finished with. */
 	void (*end_layer)(void);
Index: trunk/src/hid_nogui.c
===================================================================
--- trunk/src/hid_nogui.c	(revision 25200)
+++ trunk/src/hid_nogui.c	(revision 25201)
@@ -81,7 +81,7 @@
 	CRASH("invalidate_all");
 }
 
-static int nogui_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int nogui_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	CRASH("set_layer_group");
 	return 0;
Index: trunk/src/layer.c
===================================================================
--- trunk/src/layer.c	(revision 25200)
+++ trunk/src/layer.c	(revision 25201)
@@ -1081,7 +1081,7 @@
 		pcb_layergrp_id_t grp;
 		pcb_layer_id_t lid = v->new_id;
 		grp = pcb_layer_get_group(pcb, lid);
-		return pcb_gui->set_layer_group(grp, v->purpose, v->purpi, lid, v->type, is_empty, xform);
+		return pcb_gui->set_layer_group(&pcb->hidlib, grp, v->purpose, v->purpi, lid, v->type, is_empty, xform);
 	}
 
 	/* if the GUI doesn't have a set_layer, assume it wants to draw all layers */
@@ -1098,7 +1098,7 @@
 		*xform = NULL;
 
 	if (pcb_gui->set_layer_group != NULL)
-		return pcb_gui->set_layer_group(-1, NULL, -1, pcb_layer_id(first->parent.data, first), PCB_LYT_VIRTUAL | PCB_LYT_UI, is_empty, xform);
+		return pcb_gui->set_layer_group(&PCB->hidlib, -1, NULL, -1, pcb_layer_id(first->parent.data, first), PCB_LYT_VIRTUAL | PCB_LYT_UI, is_empty, xform);
 
 	/* if the GUI doesn't have a set_layer, assume it wants to draw all layers */
 	return 1;
Index: trunk/src/layer_grp.c
===================================================================
--- trunk/src/layer_grp.c	(revision 25200)
+++ trunk/src/layer_grp.c	(revision 25201)
@@ -687,7 +687,7 @@
 		*xform = NULL;
 
 	if (pcb_gui->set_layer_group != NULL)
-		return pcb_gui->set_layer_group(gid, grp->purpose, grp->purpi, grp->lid[0], grp->ltype, is_empty, xform);
+		return pcb_gui->set_layer_group(&PCB->hidlib, gid, grp->purpose, grp->purpi, grp->lid[0], grp->ltype, is_empty, xform);
 
 	/* if the GUI doesn't have a set_layer, assume it wants to draw all layers */
 	return 1;
Index: trunk/src_plugins/export_dxf/dxf.c
===================================================================
--- trunk/src_plugins/export_dxf/dxf.c	(revision 25200)
+++ trunk/src_plugins/export_dxf/dxf.c	(revision 25201)
@@ -347,7 +347,7 @@
 	return pcb_hid_parse_command_line(argc, argv);
 }
 
-static int dxf_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int dxf_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	if (flags & PCB_LYT_UI)
 		return 0;
Index: trunk/src_plugins/export_excellon/excellon.c
===================================================================
--- trunk/src_plugins/export_excellon/excellon.c	(revision 25200)
+++ trunk/src_plugins/export_excellon/excellon.c	(revision 25201)
@@ -289,7 +289,7 @@
 	return pcb_hid_parse_command_line(argc, argv);
 }
 
-static int excellon_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int excellon_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	int is_drill;
 
Index: trunk/src_plugins/export_gcode/gcode.c
===================================================================
--- trunk/src_plugins/export_gcode/gcode.c	(revision 25200)
+++ trunk/src_plugins/export_gcode/gcode.c	(revision 25201)
@@ -554,7 +554,7 @@
 
 /* *** PNG export (slightly modified code from PNG export HID) ************* */
 
-static int gcode_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int gcode_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	if (flags & PCB_LYT_UI)
 		return 0;
Index: trunk/src_plugins/export_gerber/gerber.c
===================================================================
--- trunk/src_plugins/export_gerber/gerber.c	(revision 25200)
+++ trunk/src_plugins/export_gerber/gerber.c	(revision 25201)
@@ -670,7 +670,7 @@
 
 
 
-static int gerber_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int gerber_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	int want_outline;
 	char *cp;
Index: trunk/src_plugins/export_openems/export_openems.c
===================================================================
--- trunk/src_plugins/export_openems/export_openems.c	(revision 25200)
+++ trunk/src_plugins/export_openems/export_openems.c	(revision 25201)
@@ -688,7 +688,7 @@
 	return pcb_hid_parse_command_line(argc, argv);
 }
 
-static int openems_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int openems_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	if (flags & PCB_LYT_COPPER) { /* export copper layers only */
 		ems_ctx->clayer = ems_ctx->lg_pcb2ems[group];
Index: trunk/src_plugins/export_openscad/export_openscad.c
===================================================================
--- trunk/src_plugins/export_openscad/export_openscad.c	(revision 25200)
+++ trunk/src_plugins/export_openscad/export_openscad.c	(revision 25201)
@@ -357,7 +357,7 @@
 
 
 
-static int openscad_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int openscad_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	if (flags & PCB_LYT_UI)
 		return 0;
Index: trunk/src_plugins/export_png/png.c
===================================================================
--- trunk/src_plugins/export_png/png.c	(revision 25200)
+++ trunk/src_plugins/export_png/png.c	(revision 25201)
@@ -1301,7 +1301,7 @@
 		return 1;
 }
 
-static int png_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int png_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	doing_outline = 0;
 
Index: trunk/src_plugins/export_ps/eps.c
===================================================================
--- trunk/src_plugins/export_ps/eps.c	(revision 25200)
+++ trunk/src_plugins/export_ps/eps.c	(revision 25201)
@@ -34,7 +34,7 @@
 static pcb_hid_attribute_t *eps_get_export_options(int *n);
 static void eps_do_export(pcb_hid_attr_val_t * options);
 static int eps_parse_arguments(int *argc, char ***argv);
-static int eps_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform);
+static int eps_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform);
 static pcb_hid_gc_t eps_make_gc(void);
 static void eps_destroy_gc(pcb_hid_gc_t gc);
 static void eps_set_color(pcb_hid_gc_t gc, const pcb_color_t *name);
@@ -383,7 +383,7 @@
 static int is_paste;
 static int is_drill;
 
-static int eps_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int eps_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	gds_t tmp_ln;
 	const char *name;
Index: trunk/src_plugins/export_ps/ps.c
===================================================================
--- trunk/src_plugins/export_ps/ps.c	(revision 25200)
+++ trunk/src_plugins/export_ps/ps.c	(revision 25201)
@@ -34,7 +34,7 @@
 
 const char *ps_cookie = "ps HID";
 
-static int ps_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform);
+static int ps_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform);
 static void use_gc(pcb_hid_gc_t gc);
 
 typedef struct hid_gc_s {
@@ -575,7 +575,7 @@
 
 	global.linewidth = -1;
 	/* reset static vars */
-	ps_set_layer_group(-1, NULL, -1, -1, 0, -1, NULL);
+	ps_set_layer_group(&PCB->hidlib, -1, NULL, -1, -1, 0, -1, NULL);
 	use_gc(NULL);
 
 	global.exps.view.X1 = 0;
@@ -598,7 +598,7 @@
 
 	global.pagecount = 1;					/* Reset 'pagecount' if single file */
 	global.doing_toc = 0;
-	ps_set_layer_group(-1, NULL, -1, -1, 0, -1, NULL); /* reset static vars */
+	ps_set_layer_group(&PCB->hidlib, -1, NULL, -1, -1, 0, -1, NULL); /* reset static vars */
 	pcb_hid_expose_all(&ps_hid, &global.exps, NULL);
 
 	if (the_file)
@@ -691,7 +691,7 @@
 	fprintf(fh, "stroke grestore\n");
 }
 
-static int ps_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int ps_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	gds_t tmp_ln;
 	static int lastgroup = -1;
Index: trunk/src_plugins/export_svg/svg.c
===================================================================
--- trunk/src_plugins/export_svg/svg.c	(revision 25200)
+++ trunk/src_plugins/export_svg/svg.c	(revision 25201)
@@ -366,7 +366,7 @@
 	return pcb_hid_parse_command_line(argc, argv);
 }
 
-static int svg_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int svg_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	int opa, is_our_mask = 0, is_our_silk = 0;
 
Index: trunk/src_plugins/hid_batch/batch.c
===================================================================
--- trunk/src_plugins/hid_batch/batch.c	(revision 25200)
+++ trunk/src_plugins/hid_batch/batch.c	(revision 25201)
@@ -205,7 +205,7 @@
 {
 }
 
-static int batch_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int batch_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	return 0;
 }
Index: trunk/src_plugins/hid_gtk2_gdk/gtkhid-gdk.c
===================================================================
--- trunk/src_plugins/hid_gtk2_gdk/gtkhid-gdk.c	(revision 25200)
+++ trunk/src_plugins/hid_gtk2_gdk/gtkhid-gdk.c	(revision 25201)
@@ -97,7 +97,7 @@
 }
 
 
-static int ghid_gdk_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int ghid_gdk_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	/* draw anything */
 	return 1;
Index: trunk/src_plugins/hid_gtk2_gl/gtkhid-gl.c
===================================================================
--- trunk/src_plugins/hid_gtk2_gl/gtkhid-gl.c	(revision 25200)
+++ trunk/src_plugins/hid_gtk2_gl/gtkhid-gl.c	(revision 25201)
@@ -138,7 +138,7 @@
 }
 #endif
 
-int ghid_gl_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+int ghid_gl_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	render_priv_t *priv = gport->render_priv;
 
@@ -147,7 +147,7 @@
 	glTranslatef(0.0f, 0.0f, -Z_NEAR);
 
 	glScalef((pcbhl_conf.editor.view.flip_x ? -1. : 1.) / gport->view.coord_per_px, (pcbhl_conf.editor.view.flip_y ? -1. : 1.) / gport->view.coord_per_px, ((pcbhl_conf.editor.view.flip_x == pcbhl_conf.editor.view.flip_y) ? 1. : -1.) / gport->view.coord_per_px);
-	glTranslatef(pcbhl_conf.editor.view.flip_x ? gport->view.x0 - PCB->hidlib.size_x : -gport->view.x0, pcbhl_conf.editor.view.flip_y ? gport->view.y0 - PCB->hidlib.size_y : -gport->view.y0, 0);
+	glTranslatef(pcbhl_conf.editor.view.flip_x ? gport->view.x0 - hidlib->size_x : -gport->view.x0, pcbhl_conf.editor.view.flip_y ? gport->view.y0 - hidlib->size_y : -gport->view.y0, 0);
 
 	/* Put the renderer into a good state so that any drawing is done in standard mode */
 
Index: trunk/src_plugins/hid_lesstif/main.c
===================================================================
--- trunk/src_plugins/hid_lesstif/main.c	(revision 25200)
+++ trunk/src_plugins/hid_lesstif/main.c	(revision 25201)
@@ -2483,7 +2483,7 @@
 		invalidate_depth++;
 }
 
-static int lesstif_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int lesstif_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	/* accept anything and draw */
 	return 1;
Index: trunk/src_plugins/hid_remote/remote.c
===================================================================
--- trunk/src_plugins/hid_remote/remote.c	(revision 25200)
+++ trunk/src_plugins/hid_remote/remote.c	(revision 25201)
@@ -134,7 +134,7 @@
 	proto_send_invalidate_all(hidlib);
 }
 
-static int remote_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int remote_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	if (flags & PCB_LYT_UI) /* do not draw UI layers yet, we didn't create them */
 		return 0;
Index: trunk/src_plugins/lib_hid_pcbui/rendering.c
===================================================================
--- trunk/src_plugins/lib_hid_pcbui/rendering.c	(revision 25200)
+++ trunk/src_plugins/lib_hid_pcbui/rendering.c	(revision 25201)
@@ -31,9 +31,9 @@
 #include "funchash_core.h"
 #include "layer.h"
 
-static int (*gui_set_layer_group)(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform);
+static int (*gui_set_layer_group)(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform);
 
-static int common_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int common_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	int idx = group;
 	if (idx >= 0 && idx < pcb_max_group(PCB)) {
@@ -77,17 +77,17 @@
 	return 0;
 }
 
-static int pcbui_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int pcbui_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	int res;
 
-	res = gui_set_layer_group(group, purpose, purpi, layer, flags, is_empty, xform);
+	res = gui_set_layer_group(hidlib, group, purpose, purpi, layer, flags, is_empty, xform);
 
 	/* if the HID doesn't want it, don't even bother running the above heuristics */
 	if (res == 0)
 		return 0;
 
-	return common_set_layer_group(group, purpose, purpi, layer, flags, is_empty, xform);
+	return common_set_layer_group(hidlib, group, purpose, purpi, layer, flags, is_empty, xform);
 }
 
 static void pcb_rendering_gui_init_ev(pcb_hidlib_t *hidlib, void *user_data, int argc, pcb_event_arg_t argv[])
Index: trunk/src_plugins/loghid/hid-logger.c
===================================================================
--- trunk/src_plugins/loghid/hid-logger.c	(revision 25200)
+++ trunk/src_plugins/loghid/hid-logger.c	(revision 25201)
@@ -60,10 +60,10 @@
 	delegatee_->notify_mark_change(hidlib, changes_complete);
 }
 
-static int log_set_layer_group(pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
+static int log_set_layer_group(pcb_hidlib_t *hidlib, pcb_layergrp_id_t group, const char *purpose, int purpi, pcb_layer_id_t layer, unsigned int flags, int is_empty, pcb_xform_t **xform)
 {
 	pcb_fprintf(out_, "set_layer(group=%ld, layer=%ld, flags=%lx, empty=%s, xform=%p)\n", group, layer, flags, is_empty ? "true" : "false", xform);
-	return delegatee_->set_layer_group(group, purpose, purpi, layer, flags, is_empty, xform);
+	return delegatee_->set_layer_group(hidlib, group, purpose, purpi, layer, flags, is_empty, xform);
 }
 
 static void log_end_layer()