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typesetting/pitfall/fontkit/glyf.rkt

27 lines
698 B
Racket

#lang fontkit/racket
(require restructure)
(provide (all-defined-out))
#|
approximates
https://github.com/mbutterick/fontkit/blob/master/src/tables/glyf.js
|#
(define-subclass Struct (Rglyf))
(define glyf (+Array (+Buffer)))
(test-module
(define ip (open-input-file charter-path))
(define dir (deserialize (read (open-input-file charter-directory-path))))
(define offset (· dir tables glyf offset))
(define len (· dir tables glyf length))
(check-equal? offset 4620)
(check-equal? len 34072)
(set-port-position! ip 0)
(define table-bytes (peek-bytes len offset ip))
(define ds (+DecodeStream table-bytes))
(define es (+EncodeStream))
(send glyf encode es empty)
#;(send es dump)
)