1 ;;;; output-lib.scm -- implement Scheme output helper functions
3 ;;;; source file of the GNU LilyPond music typesetter
5 ;;;; (c) 1998--2005 Jan Nieuwenhuizen <janneke@gnu.org>
6 ;;;; Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 ;;; Tablature functions, by Jiba (jiba@tuxfamily.org)
11 ;; The TabNoteHead stem attachment function.
12 (define (tablature-stem-attachment-function style duration)
15 ;; The TabNoteHead tablatureFormat callback.
16 ;; Compute the text grob-property
17 (define-public (fret-number-tablature-format string tuning pitch)
19 (- (ly:pitch-semitones pitch)
21 ;; remove 1 because list index starts at 0 and guitar string at 1.
24 ;; The 5-string banjo has got a extra string, the fifth (duh), wich
25 ;; starts at the fifth fret on the neck. Frets on the fifth string
26 ;; are referred to relative to the other frets:
27 ;; the "first fret" on the fifth string is really the sixth fret
29 ;; We solve this by defining a new fret-number-tablature function:
30 (define-public (fret-number-tablature-format-banjo string tuning pitch)
31 (let ((fret (- (ly:pitch-semitones pitch) (list-ref tuning (- string 1)))))
33 ((and (> fret 0) (= string 5))
37 (define-public (hammer-print-function grob)
38 (let* ((note-collums (ly:grob-property grob 'note-columns))
39 (note-column1 (cadr note-collums))
40 (note-column2 (car note-collums))
41 (note1 (car (ly:grob-property note-column1 'note-heads)))
42 (note2 (car (ly:grob-property note-column2 'note-heads)))
43 (text1 (ly:grob-property note1 'text))
44 (text2 (ly:grob-property note2 'text))
45 (fret1 (if (string? text1) (string->number text1) 0))
46 (fret2 (if (string? text2) (string->number text2) 0))
55 ;; FIXME: a hammer is not a slur.
57 (ly:make-stencil '() '(0 . 0) '(0 . 0)))
58 (layout (ly:grob-layout grob))
59 (text (interpret-markup
61 (ly:grob-alist-chain grob (ly:output-def-lookup layout 'text-font-defaults))
64 (let ((x (/ (- (cdr (ly:stencil-extent slur 0))
65 (/ (cdr (ly:stencil-extent text 0)) 2.0))
69 (ly:make-stencil (ly:stencil-expr text)
71 (ly:stencil-extent text Y)))
73 (ly:stencil-aligned-to text X RIGHT)))))
76 (define-public guitar-tuning '(4 -1 -5 -10 -15 -20))
77 (define-public bass-tuning '(-17 -22 -27 -32))
79 ;; tunings for 5-string banjo
80 (define-public banjo-open-g-tuning '(2 -1 -5 -10 7))
81 (define-public banjo-c-tuning '(2 -1 -5 -12 7))
82 (define-public banjo-modal-tuning '(2 0 -5 -10 7))
83 (define-public banjo-open-d-tuning '(2 -3 -6 -10 9))
84 (define-public banjo-open-dm-tuning '(2 -3 -6 -10 9))
85 ;; convert 5-string banjo tunings to 4-string tunings by
86 ;; removing the 5th string
89 ;; \set TabStaff.stringTunings = #(four-string-banjo banjo-open-g-tuning)
90 (define-public (four-string-banjo tuning)
91 (reverse (cdr (reverse tuning))))
93 ;;; end of tablature functions
95 (define-public (make-stencil-boxer thickness padding callback)
96 "Return function that adds a box around the grob passed as argument."
97 (lambda (grob) (box-stencil (callback grob) thickness padding)))
99 (define-public (make-stencil-circler thickness padding callback)
100 "Return function that adds a circle around the grob passed as argument."
101 (lambda (grob) (circle-stencil (callback grob) thickness padding)))
103 (define-public (arg->string arg)
104 (cond ((number? arg) (ly:inexact->string arg 10))
105 ((string? arg) (string-append "\"" arg "\""))
106 ((symbol? arg) (string-append "\"" (symbol->string arg) "\""))))
108 (define-public (print-circled-text-callback grob)
109 (let* ((text (ly:grob-property grob 'text))
110 (layout (ly:grob-layout grob))
111 (defs (ly:output-def-lookup layout 'text-font-defaults))
112 (props (ly:grob-alist-chain grob defs))
113 (circle (Text_interface::interpret_markup
114 layout props (make-draw-circle-markup 0.8 0.1)))
115 (text-stencil (Text_interface::interpret_markup layout props text)))
116 (ly:stencil-add (centered-stencil text-stencil) circle)))
119 ;;(define (mm-to-pt x)
120 ;; (* (/ 72.27 25.40) x))
122 ;; do nothing in .scm output
124 (define-public (ly:numbers->string lst)
125 (string-join (map ly:number->string lst) " "))
127 (define (number->octal-string x)
128 (let* ((n (inexact->exact x))
129 (n64 (quotient n 64))
130 (n8 (quotient (- n (* n64 64)) 8)))
134 (number->string (remainder (- n (+ (* n64 64) (* n8 8))) 8)))))
136 (define-public (ly:inexact->string x radix)
137 (let ((n (inexact->exact x)))
138 (number->string n radix)))
140 (define-public (ly:number-pair->string c)
141 (string-append (ly:number->string (car c)) " "
142 (ly:number->string (cdr c))))
146 (define-public (find-notehead-symbol duration style)
148 ((xcircle) "2xcircle")
149 ((harmonic) "0harmonic")
151 ;; Oops, I actually would not call this "baroque", but, for
152 ;; backwards compatibility to 1.4, this is supposed to take
153 ;; brevis, longa and maxima from the neo-mensural font and all
154 ;; other note heads from the default font. -- jr
156 (string-append (number->string duration) "neomensural")
157 (number->string duration)))
159 (string-append (number->string duration) (symbol->string style)))
161 (string-append (number->string duration) (symbol->string style)))
163 ;; The default font in mf/feta-bolletjes.mf defines a brevis, but
164 ;; neither a longa nor a maxima. Hence let us, for the moment,
165 ;; take these from the neo-mensural font. TODO: mf/feta-bolletjes
166 ;; should define at least a longa for the default font. The longa
167 ;; should look exactly like the brevis of the default font, but
168 ;; with a stem exactly like that of the quarter note. -- jr
170 (string-append (number->string duration) "neomensural")
171 (number->string duration)))
173 (if (string-match "vaticana*|hufnagel*|medicaea*" (symbol->string style))
174 (symbol->string style)
175 (string-append (number->string (max 0 duration))
176 (symbol->string style))))))
178 ;; TODO junk completely?
179 (define (note-head-style->attachment-coordinates grob axis)
180 "Return pair (X . Y), containing multipliers for the note head
181 bounding box, where to attach the stem. e.g.: X==0 means horizontally
182 centered, X==1 is at the right, X == -1 is at the left."
186 (define-public (string-encode-integer i)
189 ((< i 0) (string-append "n" (string-encode-integer (- i))))
191 (make-string 1 (integer->char (+ 65 (modulo i 26))))
192 (string-encode-integer (quotient i 26))))))
194 (define-public ((every-nth-bar-number-visible n) barnum) (= 0 (modulo barnum n)))
196 (define-public ((modulo-bar-number-visible n m) barnum) (and (> barnum 1) (= m (modulo barnum n))))
198 (define-public ((set-bar-number-visibility n) tr)
199 (let* ((bn (ly:context-property tr 'currentBarNumber)))
200 (ly:context-set-property! tr 'barNumberVisibility (modulo-bar-number-visible n (modulo bn n)))))
202 (define-public (default-bar-number-visibility barnum) (> barnum 1))
204 ;; See documentation of Item::visibility_lambda_
205 (define-safe-public (begin-of-line-visible d) (if (= d 1) '(#f . #f) '(#t . #t)))
206 (define-safe-public (end-of-line-visible d) (if (= d -1) '(#f . #f) '(#t . #t)))
207 (define-safe-public (spanbar-begin-of-line-invisible d) (if (= d -1) '(#t . #t) '(#f . #f)))
209 (define-safe-public (all-visible d) '(#f . #f))
210 (define-safe-public (all-invisible d) '(#t . #t))
211 (define-safe-public (begin-of-line-invisible d) (if (= d 1) '(#t . #t) '(#f . #f)))
212 (define-safe-public (center-invisible d) (if (= d 0) '(#t . #t) '(#f . #f)))
213 (define-safe-public (end-of-line-invisible d) (if (= d -1) '(#t . #t) '(#f . #f)))
216 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
220 ;; How should a bar line behave at a break?
222 ;; Why prepend `default-' to every scm identifier?
223 (define-public (default-break-barline glyph dir)
224 (let ((result (assoc glyph
225 '((":|:" . (":|" . "|:"))
226 ("||:" . ("||" . "|:"))
228 ("||:" . ("||" . "|:"))
230 ("|:" . ("|" . "|:"))
233 ;; hmm... should we end with a bar line here?
234 (".|" . ("|" . ".|"))
237 (".|." . (".|." . ()))
240 ("empty" . (() . ()))
241 ("brace" . (() . "brace"))
242 ("bracket" . (() . "bracket")) ))))
244 (if (equal? result #f)
245 (ly:warning (_ "unknown bar glyph: `~S'" glyph))
246 (index-cell (cdr result) dir))))
248 (define-public (shift-right-at-line-begin g)
249 "Shift an item to the right, but only at the start of the line."
250 (if (and (ly:item? g) (equal? (ly:item-break-dir g) RIGHT))
251 (ly:grob-translate-axis! g 3.5 X)))
254 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
257 (define-public color? list?)
260 (define-public black '(0.0 0.0 0.0))
261 (define-public white '(1.0 1.0 1.0))
262 (define-public red '(1.0 0.0 0.0))
263 (define-public green '(0.0 1.0 0.0))
264 (define-public blue '(0.0 0.0 1.0))
265 (define-public cyan '(1.0 1.0 0.0))
266 (define-public magenta '(1.0 0.0 1.0))
267 (define-public yellow '(0.0 1.0 1.0))
269 (define-public grey '(0.5 0.5 0.5))
270 (define-public darkred '(0.5 0.0 0.0))
271 (define-public darkgreen '(0.0 0.5 0.0))
272 (define-public darkblue '(0.0 0.0 0.5))
273 (define-public darkcyan '(0.5 0.5 0.0))
274 (define-public darkmagenta '(0.5 0.0 0.5))
275 (define-public darkyellow '(0.0 0.5 0.5))