1 ;;;; output-lib.scm -- implement Scheme output helper functions
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 1998--2001 Jan Nieuwenhuizen <janneke@gnu.org>
6 ;;;; Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 ; Tablature functions, by Jiba (jiba@tuxfamily.org)
10 ; The TabNoteHead stem attachment function.
11 (define (tablature-stem-attachment-function style duration)
15 ; The TabNoteHead molecule callback.
16 ; Create a text molecule
17 (define (tablature-molecule-callback grob)
18 (let ((molecule (fontify-text
19 (ly-get-default-font grob)
20 (ly-get-grob-property grob 'text)
22 molecule ; return the molecule.
26 ; The TabNoteHead tablatureFormat callback.
27 ; Compute the text grob-property
28 (define (fret-number-tablature-format string tuning pitch)
30 (- (pitch-semitones pitch)
32 (- string 1) ; remove 1 because list index starts at 0 and guitar string at 1.
38 (define (hammer-molecule-callback grob)
39 (let* ((note-collums (ly-get-grob-property grob 'note-columns))
40 (note-column1 (cadr note-collums))
41 (note-column2 (car note-collums))
42 (note1 (car (ly-get-grob-property note-column1 'note-heads)))
43 (note2 (car (ly-get-grob-property note-column2 'note-heads)))
44 (fret1 (string->number (ly-get-grob-property note1 'text)))
45 (fret2 (string->number (ly-get-grob-property note2 'text)))
46 (letter (if (< fret1 fret2) "H"
47 (if (> fret1 fret2) "P"
50 (let ((slur (Slur::brew_molecule grob))
51 (text (fontify-text (ly-get-default-font grob) letter)))
53 (let ((x (/ (- (cdr (ly-get-molecule-extent slur 0))
54 (/ (cdr (ly-get-molecule-extent text 0)) 2.0)
58 (ly-set-molecule-extent! text 0 (cons x x))
59 (ly-align-to! text 0 1)
62 (ly-combine-molecule-at-edge slur 1 1 text -0.6)
70 ; end of tablature functions
73 (define (arg->string arg)
74 (cond ((number? arg) (inexact->string arg 10))
75 ((string? arg) (string-append "\"" arg "\""))
76 ((symbol? arg) (string-append "\"" (symbol->string arg) "\""))))
79 (define (func name . args)
85 (map (lambda (x) (string-append " " (arg->string x))) args)))
89 ;;(define (mm-to-pt x)
90 ;; (* (/ 72.27 25.40) x))
92 ;; do nothing in .scm output
93 (define (comment s) "")
95 (define (numbers->string l)
96 (apply string-append (map ly-number->string l)))
98 ; (define (chop-decimal x) (if (< (abs x) 0.001) 0.0 x))
100 (define (number->octal-string x)
101 (let* ((n (inexact->exact x))
102 (n64 (quotient n 64))
103 (n8 (quotient (- n (* n64 64)) 8)))
107 (number->string (remainder (- n (+ (* n64 64) (* n8 8))) 8)))))
109 (define (inexact->string x radix)
110 (let ((n (inexact->exact x)))
111 (number->string n radix)))
114 (define (control->string c)
115 (string-append (number->string (car c)) " "
116 (number->string (cdr c)) " "))
121 (make-string 1 (integer->char (+ (char->integer #\A) i)))))
123 (define (scm-scm action-name)
128 (define (find-notehead-symbol duration style)
130 ((xcircle) (cons "2xcircle" "music"))
131 ((harmonic) (cons "0neo_mensural" "music"))
133 ;; Oops, I actually would not call this "baroque", but, for
134 ;; backwards compatibility to 1.4, this is supposed to take
135 ;; brevis, longa and maxima from the neo-mensural font and all
136 ;; other note heads from the default font. -- jr
138 (cons (string-append (number->string duration) "neo_mensural") "ancient")
139 (cons (number->string duration) "music")))
141 (cons (string-append (number->string duration) (symbol->string style))
144 (cons (string-append (number->string duration) (symbol->string style))
147 ;; The default font in mf/feta-bolletjes.mf defines a brevis, but
148 ;; neither a longa nor a maxima. Hence let us, for the moment,
149 ;; take these from the neo-mensural font. TODO: mf/feta-bolletjes
150 ;; should define at least a longa for the default font. The longa
151 ;; should look exactly like the brevis of the default font, but
152 ;; with a stem exactly like that of the quarter note. -- jr
154 (cons (string-append (number->string duration) "neo_mensural") "ancient")
155 (cons (number->string duration) "music")))
157 (cons (string-append (number->string (max 0 duration)) (symbol->string style))
161 (define (note-head-style->attachment-coordinates style duration)
162 "Return pair (X . Y), containing multipliers for the note head
163 bounding box, where to attach the stem. e.g.: X==0 means horizontally
164 centered, X==1 is at the right, X == -1 is at the left."
169 '(0.0 . 0.6) ;; neo-mensural
170 '(1.0 . 0.5) ;; default
172 ((cross) '(1.0 . 0.75))
173 ((mensural) '(0.0 . 0.6))
174 ((neo_mensural) '(0.0 . 0.6))
175 ((diamond) '(1.0 . 0.8))
176 ((transparent) '(1.0 . 1.0))
177 ((slash) '(1.0 . 1.0))
178 ((harmonic) '(1.0 0.0))
179 ((triangle) '(0.75 . 0.15))
182 '(0.0 . 0.6) ;; neo-mensural
183 '(1.0 . 0.5) ;; default
187 ;; this also works for easy notation.
191 (define (find-timesig-symbol nom denom style)
198 (number->string denom))
205 (number->string denom))
211 (number->string denom))
214 ;; default: use "C" style when possible, otherwise return ""
228 (define (string-encode-integer i)
231 ((< i 0) (string-append "n" (string-encode-integer (- i))))
233 (make-string 1 (integer->char (+ 65 (modulo i 26))))
234 (string-encode-integer (quotient i 26))))))