-void a_mapcache_remove_all_shrinkfactors ( gint x, gint y, gint z, guint16 type, gint zoom );
+mapcache_extra_t a_mapcache_get_extra ( gint x, gint y, gint z, guint16 type, gint zoom, guint8 alpha, gdouble xshrinkfactor, gdouble yshrinkfactor, const gchar* name );
+void a_mapcache_remove_all_shrinkfactors ( gint x, gint y, gint z, guint16 type, gint zoom, const gchar* name );