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;;; cl-pdf copyright 2002-2003 Marc Battyani see license.txt for the details
;;; You can reach me at marc.battyani@fractalconcept.com or marc@battyani.net
;;; The homepage of cl-pdf is here: http://www.fractalconcept.com/asp/html/cl-pdf.html
;; code 128 barcode from Lars Rustemeier
(in-package #:pdf)
;;
;; Utils
;;
(defun group (string n)
(when (zerop n) (error "zero length"))
(loop with length = (length string)
for i from 0 below length by n
collect (subseq string i (min (+ i n) length))))
;;
;; Logic Layer
;;
;; Format:
;; [Value] [Code A] [Code B] [Code C] [Pattern (B S B S B S)]
(defparameter *table*
'((0 #\space #\space "00" 2 -1 2 -2 2 -2)
(1 #\! #\! "01" 2 -2 2 -1 2 -2)
(2 #\" #\" "02" 2 -2 2 -2 2 -1)
(3 #\# #\# "03" 1 -2 1 -2 2 -3)
(4 #\$ #\$ "04" 1 -2 1 -3 2 -2)
(5 #\% #\% "05" 1 -3 1 -2 2 -2)
(6 #\& #\& "06" 1 -2 2 -2 1 -3)
(7 #\' #\' "07" 1 -2 2 -3 1 -2)
(8 #\( #\( "08" 1 -3 2 -2 1 -2)
(9 #\) #\) "09" 2 -2 1 -2 1 -3)
(10 #\* #\* "10" 2 -2 1 -3 1 -2)
(11 #\+ #\+ "11" 2 -3 1 -2 1 -2)
(12 #\, #\, "12" 1 -1 2 -2 3 -2)
(13 #\- #\- "13" 1 -2 2 -1 3 -2)
(14 #\. #\. "14" 1 -2 2 -2 3 -1)
(15 #\/ #\/ "15" 1 -1 3 -2 2 -2)
(16 #\0 #\0 "16" 1 -2 3 -1 2 -2)
(17 #\1 #\1 "17" 1 -2 3 -2 2 -1)
(18 #\2 #\2 "18" 2 -2 3 -2 1 -1)
(19 #\3 #\3 "19" 2 -2 1 -1 3 -2)
(20 #\4 #\4 "20" 2 -2 1 -2 3 -1)
(21 #\5 #\5 "21" 2 -1 3 -2 1 -2)
(22 #\6 #\6 "22" 2 -2 3 -1 1 -2)
(23 #\7 #\7 "23" 3 -1 2 -1 3 -1)
(24 #\8 #\8 "24" 3 -1 1 -2 2 -2)
(25 #\9 #\9 "25" 3 -2 1 -1 2 -2)
(26 #\: #\: "26" 3 -2 1 -2 2 -1)
(27 #\; #\; "27" 3 -1 2 -2 1 -2)
(28 #\< #\< "28" 3 -2 2 -1 1 -2)
(29 #\= #\= "29" 3 -2 2 -2 1 -1)
(30 #\> #\> "30" 2 -1 2 -1 2 -3)
(31 #\? #\? "31" 2 -1 2 -3 2 -1)
(32 #\@ #\@ "32" 2 -3 2 -1 2 -1)
(33 #\A #\A "33" 1 -1 1 -3 2 -3)
(34 #\B #\B "34" 1 -3 1 -1 2 -3)
(35 #\C #\C "35" 1 -3 1 -3 2 -1)
(36 #\D #\D "36" 1 -1 2 -3 1 -3)
(37 #\E #\E "37" 1 -3 2 -1 1 -3)
(38 #\F #\F "38" 1 -3 2 -3 1 -1)
(39 #\G #\G "39" 2 -1 1 -3 1 -3)
(40 #\H #\H "40" 2 -3 1 -1 1 -3)
(41 #\I #\I "41" 2 -3 1 -3 1 -1)
(42 #\J #\J "42" 1 -1 2 -1 3 -3)
(43 #\K #\K "43" 1 -1 2 -3 3 -1)
(44 #\L #\L "44" 1 -3 2 -1 3 -1)
(45 #\M #\M "45" 1 -1 3 -1 2 -3)
(46 #\N #\N "46" 1 -1 3 -3 2 -1)
(47 #\O #\O "47" 1 -3 3 -1 2 -1)
(48 #\P #\P "48" 3 -1 3 -1 2 -1)
(49 #\Q #\Q "49" 2 -1 1 -3 3 -1)
(50 #\R #\R "50" 2 -3 1 -1 3 -1)
(51 #\S #\S "51" 2 -1 3 -1 1 -3)
(52 #\T #\T "52" 2 -1 3 -3 1 -1)
(53 #\U #\U "53" 2 -1 3 -1 3 -1)
(54 #\V #\V "54" 3 -1 1 -1 2 -3)
(55 #\W #\W "55" 3 -1 1 -3 2 -1)
(56 #\X #\X "56" 3 -3 1 -1 2 -1)
(57 #\Y #\Y "57" 3 -1 2 -1 1 -3)
(58 #\Z #\Z "58" 3 -1 2 -3 1 -1)
(59 #\[ #\[ "59" 3 -3 2 -1 1 -1)
(60 #\\ #\\ "60" 3 -1 4 -1 1 -1)
(61 #\] #\] "61" 2 -2 1 -4 1 -1)
(62 #\^ #\^ "62" 4 -3 1 -1 1 -1)
(63 #\_ #\_ "63" 1 -1 1 -2 2 -4)
(64 :NUL #\' "64" 1 -1 1 -4 2 -2)
(65 :SOH #\a "65" 1 -2 1 -1 2 -4)
(66 :STX #\b "66" 1 -2 1 -4 2 -1)
(67 :ETX #\c "67" 1 -4 1 -1 2 -2)
(68 :EOT #\d "68" 1 -4 1 -2 2 -1)
(69 :ENQ #\e "69" 1 -1 2 -2 1 -4)
(70 :ACK #\f "70" 1 -1 2 -4 1 -2)
(71 :BEL #\g "71" 1 -2 2 -1 1 -4)
(72 :BS #\h "72" 1 -2 2 -4 1 -1)
(73 :HT #\i "73" 1 -4 2 -1 1 -2)
(74 :LF #\j "74" 1 -4 2 -2 1 -1)
(75 :VT #\k "75" 2 -4 1 -2 1 -1)
(76 :FF #\l "76" 2 -2 1 -1 1 -4)
(77 :CR #\m "77" 4 -1 3 -1 1 -1)
(78 :SO #\n "78" 2 -4 1 -1 1 -2)
(79 :SI #\o "79" 1 -3 4 -1 1 -1)
(80 :DLE #\p "80" 1 -1 1 -2 4 -2)
(81 :DC1 #\q "81" 1 -2 1 -1 4 -2)
(82 :DC2 #\r "82" 1 -2 1 -2 4 -1)
(83 :DC3 #\s "83" 1 -1 4 -2 1 -2)
(84 :DC4 #\t "84" 1 -2 4 -1 1 -2)
(85 :NAK #\u "85" 1 -2 4 -2 1 -1)
(86 :SYN #\v "86" 4 -1 1 -2 1 -2)
(87 :ETB #\w "87" 4 -2 1 -1 1 -2)
(88 :CAN #\x "88" 4 -2 1 -2 1 -1)
(89 :EM #\y "89" 2 -1 2 -1 4 -1)
(90 :SUB #\z "90" 2 -1 4 -1 2 -1)
(91 :ESC #\{ "91" 4 -1 2 -1 2 -1)
(92 :FS #\| "92" 1 -1 1 -1 4 -3)
(93 :GS #\} "93" 1 -1 1 -3 4 -1)
(94 :RS #\~ "94" 1 -3 1 -1 4 -1)
(95 :US :DEL "95" 1 -1 4 -1 1 -3)
(96 :FNC-3 :FNC-3 "96" 1 -1 4 -3 1 -1)
(97 :FNC-2 :FNC-2 "97" 4 -1 1 -1 1 -3)
(98 :SHIFT :SHIFT "98" 4 -1 1 -3 1 -1)
(99 :CODE-C :CODE-C "99" 1 -1 3 -1 4 -1)
(100 :CODE-B :FNC-4 :CODE-B 1 -1 4 -1 3 -1)
(101 :FNC-4 :CODE-A :CODE-A 3 -1 1 -1 4 -1)
(102 :FNC-1 :FNC-1 :FNC-1 4 -1 1 -1 3 -1)
(103 :START-A :START-A :START-A 2 -1 1 -4 1 -2)
(104 :START-B :START-B :START-B 2 -1 1 -2 1 -4)
(105 :START-C :START-C :START-C 2 -1 1 -2 3 -2)
(106 :STOP :STOP :STOP 2 -3 3 -1 1 -1 2)))
(defconstant +magic-modulo-number+ 103)
(defun build-char-ht (lst hpred key-selector val-selector)
(let ((ht (make-hash-table :test hpred)))
(dolist (e lst)
(setf (gethash (funcall key-selector e) ht) (funcall val-selector e)))
ht))
(defparameter *table-h* (build-char-ht *table* #'eql #'first #'cdr))
(defparameter *table-a* (build-char-ht *table* #'eql #'second #'(lambda (e) (cons (first e) (cddddr e)))))
(defparameter *table-b* (build-char-ht *table* #'eql #'third #'(lambda (e) (cons (first e) (cddddr e)))))
(defparameter *table-c* (build-char-ht *table* #'equal #'fourth #'(lambda (e) (cons (first e) (cddddr e)))))
;;
;; Calulate checksum
;;
(defun code128-checksum (chars)
(mod (do ((vals (cdr chars) (cdr vals))
(factor 1 (+ factor 1))
(chksum (first chars) (+ chksum (* (car vals) factor))))
((null vals)
chksum))
+magic-modulo-number+))
;;
;; Generic
;;
(defun code128-n-raw (string start s-table getter)
(let ((chars-and-bars (cons (gethash start s-table)
(map 'list #'(lambda (s) (gethash s s-table)) string))))
(let* ((chars (mapcar #'car chars-and-bars))
(bars (mapcar #'cdr chars-and-bars))
(chksum (code128-checksum chars))
(chk-char-bar (cdr (gethash (funcall getter (gethash chksum *table-h*)) s-table)))
(stop (cdr (gethash :STOP s-table))))
(append bars (list chk-char-bar stop)))))
;;
;; Chars and control codes
;;
(defun code128-a (text)
(code128-n-raw text :START-A *table-a* #'first))
;;
;; Full printable ascii
;;
(defun code128-b (text)
(code128-n-raw text :START-B *table-b* #'second))
;;
;; Compact digits
;;
(defun code128-c (text)
(code128-n-raw (group text 2) :START-C *table-c* #'third))
;;
;; Calculate width of barcode in units
;;
(defun unit-width (lst)
;;(reduce + 0 (map (lambda (e) (reduce + 0 e)) (map second lst))))
(reduce #'+ (mapcar #'(lambda (e) (reduce #'+ (mapcar #'abs e))) lst)))
;;
;; Drawing (Presentation Layer)
;;
(defun draw-bar-segment (line-height line-width black)
(with-saved-state
(when (plusp black)
(rectangle 0 0 (* black line-width) (- line-height))
(fill-path)))
(translate (abs (* black line-width)) 0))
(defun draw-bars (bars line-height line-width &optional (start-stop-factor 0))
(let ((l (length bars)))
(do* ((bars bars (cdr bars))
(bar (car bars) (car bars))
(i 0 (1+ i)))
((null bars)
nil)
(dolist (segment bar)
(let ((line-height (if (or (= i 0) (= i (- l 1)))
(* line-height (+ 1 start-stop-factor))
line-height)))
(draw-bar-segment line-height line-width segment))))))
(defun draw-chars (string line-height line-width font font-size segs-per-char)
(with-saved-state
(translate (* 11 line-width) (- (+ line-height font-size)))
(set-font font font-size)
(loop for char across string do
(with-saved-state
(in-text-mode
(show-char char)))
(translate (* segs-per-char line-width) 0))))
;;
;; Autoselect's mode based on content
;;
;; One could spend a lot of time on making really smart (Switching
;; between alphabets on the fly etc). I fear that for more advanced
;; uses it is better to let the user specify the token list
;; manually. Or build utils on top of this file's functionality. There
;; simply are too many border cases for this to make me feel right
;; about a totally automatic approach.
(defun draw-bar-code128 (string x y &key (font (get-font)) (font-size 5) (start-stop-factor 0.3) (height 100) (width 400) (show-string t) (segs-per-char 11 segs-per-char-p))
(let ((dispatch #'code128-b))
(when (and (evenp (length string))(every #'digit-char-p string))
(unless segs-per-char-p
(setf segs-per-char 5.5))
(setf dispatch #'code128-c))
(with-saved-state
(translate x y)
(set-line-width 0)
(let* ((bars (funcall dispatch string))
(unit-w (unit-width bars))
(line-width (/ width unit-w))
(line-height height))
(with-saved-state
(draw-bars bars line-height line-width start-stop-factor))
(when show-string
(with-saved-state
(draw-chars string line-height line-width font font-size segs-per-char)))))))
;;
;; Pres test code
;;
#+nil
(defun tester (str &optional (to-file "/tmp/foobar.pdf"))
(pdf:with-document ()
(pdf:with-page ()
(pdf:with-outline-level ((format nil "BarCodes Sample") (pdf:register-page-reference))
(pdf:with-saved-state
(pdf:translate -150 -400)
(pdf:rotate 90)
(pdf:translate 500 -300)
(pdf:rotate 5)
(draw-bar-code128 str 0 0 :height 300 :width 600 :start-stop-factor 0.2 :font-size 40 :show-string t))))
(pdf:write-document to-file)))
#+nil
(tester "CL:PDF Marc B" #P"/home/largo/char-b.pdf")
#+nil
(tester "012345" #P"/home/largo/char-c.pdf")
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