Index: ttf2lht/drv_poly.c
===================================================================
--- ttf2lht/drv_poly.c	(revision 18955)
+++ ttf2lht/drv_poly.c	(revision 18956)
@@ -61,11 +61,15 @@
 
 void stroke_poly_init(stroke_t *s_)
 {
+	poly_stroke_t *s = (poly_stroke_t *)s_;
+
 	drv_approx_comment = NULL;
 	printf("li:pcb-rnd-font-v1 {\n");
 	printf(" ha:geda_pcb {\n");
 	printf("  id = 0\n");
 	printf("  ha:symbols {\n");
+
+	s->maxx = s->maxy = 0;
 }
 
 static void emit(pcb_pline_t *pl, void *user_data)
@@ -77,7 +81,12 @@
 	printf("     li:simplepoly.%d {\n", s->spid++);
 	n = pl->Count;
 	for(i = 0, v = &pl->head; i < n; v = v->next, i++) {
-		printf("       %fmil; %fmil\n", OTX(&s->s, v->point[0]), OTY(&s->s, v->point[1]));
+		double x = OTX(&s->s, v->point[0]), y = OTY(&s->s, v->point[1]);
+		if (x > s->maxx)
+			s->maxx = x;
+		if (y > s->maxy)
+			s->maxy = y;
+		printf("       %fmil; %fmil\n", x, y);
 	}
 	printf("     }\n");
 }
@@ -128,7 +137,11 @@
 
 void stroke_poly_uninit(stroke_t *s_)
 {
+	poly_stroke_t *s = (poly_stroke_t *)s_;
+
 	printf("  }\n");
+	printf("  cell_width = %fmil\n", s->maxx);
+	printf("  cell_height = %fmil\n", s->maxy);
 	printf(" }\n");
 	printf("}\n");
 #warning TODO: free fields
Index: ttf2lht/drv_poly.h
===================================================================
--- ttf2lht/drv_poly.h	(revision 18955)
+++ ttf2lht/drv_poly.h	(revision 18956)
@@ -14,6 +14,7 @@
 	pcb_polyarea_t *pa;
 
 	int spid;
+	double maxx, maxy;
 } poly_stroke_t;
 
 extern poly_stroke_t poly_stroke;