Index: ttf2lht/drv_poly.c
===================================================================
--- ttf2lht/drv_poly.c	(revision 18956)
+++ ttf2lht/drv_poly.c	(revision 18957)
@@ -81,7 +81,7 @@
 	printf("     li:simplepoly.%d {\n", s->spid++);
 	n = pl->Count;
 	for(i = 0, v = &pl->head; i < n; v = v->next, i++) {
-		double x = OTX(&s->s, v->point[0]), y = OTY(&s->s, v->point[1]);
+		double x = OTX(&s->s, v->point[0]), y = 100.0 - OTY(&s->s, v->point[1]);
 		if (x > s->maxx)
 			s->maxx = x;
 		if (y > s->maxy)