You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
106 lines
6.5 KiB
Racket
106 lines
6.5 KiB
Racket
#lang fontkit/racket
|
|
(require restructure)
|
|
(provide (all-defined-out))
|
|
#|
|
|
approximates
|
|
https://github.com/mbutterick/fontkit/blob/master/src/tables/prep.js
|
|
|#
|
|
|
|
(define-subclass Struct (Rprep))
|
|
|
|
(define prep (make-object Rprep
|
|
(dictify
|
|
'controlValueProgram (+Array uint8))))
|
|
|
|
|
|
(test-module
|
|
(require racket/serialize)
|
|
(define ip (open-input-file charter-path))
|
|
(define dir (deserialize (read (open-input-file charter-directory-path))))
|
|
(define offset (· dir tables prep offset))
|
|
(define len (· dir tables prep length))
|
|
(check-equal? offset 4512)
|
|
(check-equal? len 78)
|
|
(set-port-position! ip 0)
|
|
(define table-bytes #"\270\0\0+\0\272\0\1\0\1\0\2+\1\272\0\2\0\1\0\2+\1\277\0\2\0C\0007\0+\0\37\0\23\0\0\0\b+\0\277\0\1\0\200\0i\0R\0;\0#\0\0\0\b+\0\272\0\3\0\5\0\a+\270\0\0 E}i\30D")
|
|
(check-equal? table-bytes (peek-bytes len offset ip))
|
|
(define ds (+DecodeStream (peek-bytes len offset ip)))
|
|
(check-equal? (hash-ref (send prep decode ds) 'controlValueProgram) '(184
|
|
0
|
|
0
|
|
43
|
|
0
|
|
186
|
|
0
|
|
1
|
|
0
|
|
1
|
|
0
|
|
2
|
|
43
|
|
1
|
|
186
|
|
0
|
|
2
|
|
0
|
|
1
|
|
0
|
|
2
|
|
43
|
|
1
|
|
191
|
|
0
|
|
2
|
|
0
|
|
67
|
|
0
|
|
55
|
|
0
|
|
43
|
|
0
|
|
31
|
|
0
|
|
19
|
|
0
|
|
0
|
|
0
|
|
8
|
|
43
|
|
0
|
|
191
|
|
0
|
|
1
|
|
0
|
|
128
|
|
0
|
|
105
|
|
0
|
|
82
|
|
0
|
|
59
|
|
0
|
|
35
|
|
0
|
|
0
|
|
0
|
|
8
|
|
43
|
|
0
|
|
186
|
|
0
|
|
3
|
|
0
|
|
5
|
|
0
|
|
7
|
|
43
|
|
184
|
|
0
|
|
0
|
|
32
|
|
69
|
|
125
|
|
105
|
|
24
|
|
68)))
|