all tests work

pitfall/fontkit/GPOS-test.rkt

@@ -2,10 +2,7 @@
 (require fontkit "subset.rkt" rackunit xenomorph racket/serialize)
 
 (define fira-path "../pitfall/test/assets/fira.ttf")
-(define f (openSync charter-path))
-(define ttfs (make-object TTFSubset f))
-(send ttfs encodeStream)
-
-#;(define gpos (· f GPOS))
-#;(get (· gpos lookupList) 7)
+(define f (openSync fira-path))
+(define gpos (· f GPOS))
+(get (· gpos lookupList) 11)
 

pitfall/fontkit/subset.rkt

@@ -76,7 +76,8 @@ https://github.com/mbutterick/fontkit/blob/master/src/subset/TTFSubset.js
   (when (and glyf (negative? (· glyf numberOfContours)))
     (for ([component (in-list (· glyf components))])
       (define gid (send this includeGlyph (· component glyphID)))
-      (bytes-copy! buffer (pos component) (send uint16be encode #f gid))))
+      ;; note: this (· component pos) is correct. It's a field of a Component object, not a port
+      (bytes-copy! buffer (· component pos) (send uint16be encode #f gid))))
   
   ;; skip variation shit