--- /dev/null
+;;;; This file is part of LilyPond, the GNU music typesetter.
+;;;;
+;;;; Copyright (C) 2009--2011 Marc Hohl <marc@hohlart.de>
+;;;;
+;;;; LilyPond is free software: you can redistribute it and/or modify
+;;;; it under the terms of the GNU General Public License as published by
+;;;; the Free Software Foundation, either version 3 of the License, or
+;;;; (at your option) any later version.
+;;;;
+;;;; LilyPond is distributed in the hope that it will be useful,
+;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;;; GNU General Public License for more details.
+;;;;
+;;;; You should have received a copy of the GNU General Public License
+;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+
+
+;; for more control over glyph-name calculations,
+;; we use a custom callback for tab note heads
+;; which will ignore 'style = 'do
+(define-public (tab-note-head::calc-glyph-name grob)
+ (let ((style (ly:grob-property grob 'style)))
+
+ (case style
+ ((cross) "2cross"))))
+
+;; ensure we only call note head callback when
+;; 'style = 'cross
+(define-public (tab-note-head::whiteout-if-style-set grob)
+ (let ((style (ly:grob-property grob 'style)))
+
+ (if (and (symbol? style)
+ (eq? style 'cross))
+ (stencil-whiteout (ly:note-head::print grob))
+ (tab-note-head::print grob))))
+
+;; definitions for the "moderntab" clef:
+;; the "moderntab" clef will be added to the list of known clefs,
+;; so it can be used as any other clef: \clef "moderntab"
+(add-new-clef "moderntab" "markup.moderntab" 0 0 0)
+
+;; define sans serif-style tab-Clefs as a markup:
+(define-markup-command (customTabClef
+ layout props num-strings staff-space)
+ (integer? number?)
+ #:category music
+ "Draw a tab clef sans-serif style."
+ (define (square x) (* x x))
+ (let* ((scale-factor (/ staff-space 1.5))
+ (font-size (- (* num-strings 1.5 scale-factor) 7))
+ (base-skip (* (square (+ (* num-strings 0.195) 0.4)) scale-factor)))
+
+ (interpret-markup layout props
+ (markup #:vcenter #:bold
+ #:override (cons 'font-family 'sans)
+ #:fontsize font-size
+ #:override (cons 'baseline-skip base-skip)
+ #:left-align #:center-column ("T" "A" "B")))))
+
+;; this function decides which clef to take
+(define-public (clef::print-modern-tab-if-set grob)
+ (let ((glyph (ly:grob-property grob 'glyph)))
+
+ ;; which clef is wanted?
+ (if (string=? glyph "markup.moderntab")
+ ;; if it is "moderntab", we'll draw it
+ (let* ((staff-symbol (ly:grob-object grob 'staff-symbol))
+ (line-count (if (ly:grob? staff-symbol)
+ (ly:grob-property staff-symbol 'line-count)
+ 0))
+ (staff-space (ly:staff-symbol-staff-space grob)))
+
+ (grob-interpret-markup grob (make-customTabClef-markup line-count
+ staff-space)))
+ ;; otherwise, we simply use the default printing routine
+ (ly:clef::print grob))))
+
+;; if stems are drawn, it is nice to have a double stem for
+;; (dotted) half notes to distinguish them from quarter notes:
+(define-public (tabvoice::draw-double-stem-for-half-notes grob)
+ (let ((stem (ly:stem::print grob)))
+
+ ;; is the note a (dotted) half note?
+ (if (= 1 (ly:grob-property grob 'duration-log))
+ ;; yes -> draw double stem
+ (ly:stencil-combine-at-edge stem X RIGHT stem 0.5)
+ ;; no -> draw simple stem
+ stem)))
+
+;; as default, the glissando line between fret numbers goes
+;; upwards, here we have a function to correct this behavior:
+(define-public (glissando::calc-tab-extra-dy grob)
+ (let* ((original (ly:grob-original grob))
+ (left-bound (ly:spanner-bound original LEFT))
+ (right-bound (ly:spanner-bound original RIGHT))
+ (left-pitch (ly:event-property (event-cause left-bound) 'pitch))
+ (right-pitch (ly:event-property (event-cause right-bound) 'pitch)))
+
+ (if (< (ly:pitch-semitones right-pitch) (ly:pitch-semitones left-pitch))
+ -0.75
+ 0.75)))
+
+;; the handler for ties in tablature; according to TabNoteHead #'details,
+;; the 'tied to' note is handled differently after a line break
+(define-public (tie::handle-tab-note-head grob)
+ (let* ((original (ly:grob-original grob))
+ (tied-tab-note-head (ly:spanner-bound grob RIGHT))
+ (spanner-start (ly:grob-property tied-tab-note-head 'span-start #f))
+ (siblings (if (ly:grob? original)
+ (ly:spanner-broken-into original) '())))
+
+ (if spanner-start
+ ;; tab note head is right bound of a tie and left of spanner,
+ ;; -> parenthesize it at all events
+ (begin
+ (ly:grob-set-property! tied-tab-note-head 'display-cautionary #t)
+ (ly:grob-set-property! tied-tab-note-head 'stencil tab-note-head::print))
+ ;; otherwise, check whether tie is split:
+ (if (and (>= (length siblings) 2)
+ (eq? (car (last-pair siblings)) grob))
+ ;; tie is split -> get TabNoteHead #'details
+ (let* ((details (ly:grob-property tied-tab-note-head 'details))
+ (tied-properties (assoc-get 'tied-properties details '()))
+ (tab-note-head-parenthesized (assoc-get 'parenthesize tied-properties #t))
+ ;; we need the begin-of-line entry in the 'break-visibility vector
+ (tab-note-head-visible
+ (vector-ref (assoc-get 'break-visibility
+ tied-properties #(#f #f #t)) 2)))
+
+ (if tab-note-head-visible
+ ;; tab note head is visible
+ (if tab-note-head-parenthesized
+ (begin
+ (ly:grob-set-property! tied-tab-note-head 'display-cautionary #t)
+ (ly:grob-set-property! tied-tab-note-head 'stencil tab-note-head::print)))
+ ;; tab note head is invisible
+ (ly:grob-set-property! tied-tab-note-head 'transparent #t)))
+
+ ;; tie is not split
+ (ly:grob-set-property! tied-tab-note-head 'transparent #t)))))
+
+
+
+;; repeat ties occur within alternatives in a repeat construct;
+;; TabNoteHead #'details handles the appearance in this case
+(define-public (repeat-tie::handle-tab-note-head grob)
+ (let* ((tied-tab-note-head (ly:grob-object grob 'note-head))
+ (spanner-start (ly:grob-property tied-tab-note-head 'span-start #f)))
+ (if spanner-start
+ ;; tab note head is between a tie and a slur/glissando
+ ;; -> parenthesize it at all events
+ (begin
+ (ly:grob-set-property! tied-tab-note-head 'display-cautionary #t)
+ (ly:grob-set-property! tied-tab-note-head 'stencil tab-note-head::print))
+ ;; otherwise check 'details
+ (let* ((details (ly:grob-property tied-tab-note-head 'details))
+ (repeat-tied-properties (assoc-get 'repeat-tied-properties details '()))
+ (tab-note-head-visible (assoc-get 'note-head-visible repeat-tied-properties #t))
+ (tab-note-head-parenthesized (assoc-get 'parenthesize repeat-tied-properties #t)))
+
+ (if tab-note-head-visible
+ ;; tab note head is visible
+ (if tab-note-head-parenthesized
+ (begin
+ (ly:grob-set-property! tied-tab-note-head 'display-cautionary #t)
+ (ly:grob-set-property! tied-tab-note-head 'stencil tab-note-head::print)))
+ ;; tab note head is invisible
+ (ly:grob-set-property! tied-tab-note-head 'transparent #t))))))
+
+;; the slurs should not be too far apart from the corresponding fret number, so
+;; we move the slur towards the TabNoteHeads; moreover, if the left fret number is
+;; the right-bound of a tie, we'll set it in parentheses:
+(define-public (slur::draw-tab-slur grob)
+ ;; TODO: use a less "brute-force" method to decrease
+ ;; the distance between the slur ends and the fret numbers
+ (let* ((original (ly:grob-original grob))
+ (left-bound (ly:spanner-bound original LEFT))
+ (left-tab-note-head (ly:grob-property left-bound 'cause))
+ (staff-space (ly:staff-symbol-staff-space grob))
+ (control-points (ly:grob-property grob 'control-points))
+ (new-control-points (map
+ (lambda (p)
+ (cons (car p)
+ (- (cdr p)
+ (* staff-space
+ (ly:grob-property grob 'direction)
+ 0.35))))
+ control-points)))
+
+ (ly:grob-set-property! grob 'control-points new-control-points)
+ (ly:slur::print grob)))
+
+;; The glissando routine works similarly to the slur routine; if the
+;; fret number is "tied to", it should become parenthesized.
+(define-public (glissando::draw-tab-glissando grob)
+ (let* ((original (ly:grob-original grob))
+ (left-tab-note-head (ly:spanner-bound original LEFT))
+ (cautionary (ly:grob-property left-tab-note-head 'display-cautionary #f)))
+
+ (and cautionary
+ ;; increase left padding to avoid collision between
+ ;; closing parenthesis and glissando line
+ (ly:grob-set-nested-property! grob '(bound-details left padding) 0.5))
+ (ly:line-spanner::print grob)))
+
+;; for \tabFullNotation, the stem tremolo beams are too big in comparison to
+;; normal staves; this wrapper function scales accordingly:
+(define-public (stem-tremolo::calc-tab-width grob)
+ (let ((width (ly:stem-tremolo::calc-width grob))
+ (staff-space (ly:staff-symbol-staff-space grob)))
+ (/ width staff-space)))
+
+
+;; a callback for custom fret labels
+(define-public ((tab-note-head::print-custom-fret-label fret) grob)
+ (ly:grob-set-property! grob 'text fret)
+ (tab-note-head::print grob))
+
+(define-public (tab-note-head::print grob)
+ (define (is-harmonic? grob)
+ (let ((arts (ly:event-property (event-cause grob) 'articulations)))
+ (or (pair? (filter (lambda (a)
+ (ly:in-event-class? a 'harmonic-event))
+ arts))
+ (eq? (ly:grob-property grob 'style) 'harmonic))))
+
+ (let* ((cautionary (ly:grob-property grob 'display-cautionary #f))
+ (details (ly:grob-property grob 'details '()))
+ (harmonic-props (assoc-get 'harmonic-properties details '()))
+ (harmonic-angularity (assoc-get 'angularity harmonic-props 2))
+ (harmonic-half-thick (assoc-get 'half-thickness harmonic-props 0.075))
+ (harmonic-padding (assoc-get 'padding harmonic-props 0))
+ (harmonic-proc (assoc-get 'procedure harmonic-props parenthesize-stencil))
+ (harmonic-width (assoc-get 'width harmonic-props 0.25))
+ (cautionary-props (assoc-get 'cautionary-properties details '()))
+ (cautionary-angularity (assoc-get 'angularity cautionary-props 2))
+ (cautionary-half-thick (assoc-get 'half-thickness cautionary-props 0.075))
+ (cautionary-padding (assoc-get 'padding cautionary-props 0))
+ (cautionary-proc (assoc-get 'procedure cautionary-props parenthesize-stencil))
+ (cautionary-width (assoc-get 'width cautionary-props 0.25))
+ (output-grob (ly:text-interface::print grob))
+ (ref-grob (grob-interpret-markup grob "8"))
+ (offset-factor (assoc-get 'head-offset details 3/5))
+ (column-offset (* offset-factor
+ (interval-length
+ (ly:stencil-extent
+ (grob-interpret-markup grob "8")
+ X)))))
+
+ (if (is-harmonic? grob)
+ (set! output-grob (harmonic-proc output-grob
+ harmonic-half-thick
+ harmonic-width
+ harmonic-angularity
+ harmonic-padding)))
+ (if cautionary
+ (set! output-grob (cautionary-proc output-grob
+ cautionary-half-thick
+ cautionary-width
+ cautionary-angularity
+ cautionary-padding)))
+ (ly:stencil-translate-axis (centered-stencil output-grob)
+ column-offset
+ X)))
+
+;; Harmonic definitions
+
+(define node-positions
+ ;; for the node on m/n-th of the string length, we get the corresponding
+ ;; (exact) fret position by calculating p=(-12/log 2)*log(1-(m/n));
+ ;; since guitarists normally use the forth fret and not the 3.8th, here
+ ;; are rounded values, ordered by
+ ;; 1/2
+ ;; 1/3 2/3
+ ;; 1/4 2/4 3/4 etc.
+ ;; The value for 2/4 is irrelevant in practical, bacause the string sounds
+ ;; only one octave higher, not two, but since scheme normalizes the fractions
+ ;; anyway, these values are simply placeholders for easier indexing.
+ ;; According to the arithmetic sum, the position of m/n is at 1/2*(n-2)(n-1)+(m-1)
+ ;; if we start counting from zero
+ (vector 12
+ 7 19
+ 5 12 24
+ 4 9 16 28
+ 3 7 12 19 31
+ 2.7 5.8 9.7 14.7 21.7 33.7
+ 2.3 5 8 12 17 24 36
+ 2 4.4 7 10 14 19 26 38 ))
+
+(define partial-pitch
+ (vector '(0 0 0)
+ '(1 0 0)
+ '(1 4 0)
+ '(2 0 0)
+ '(2 2 0)
+ '(2 4 0)
+ '(2 6 -1/2)
+ '(3 0 0)
+ '(3 1 0)))
+
+(define fret-partials
+ '(("0" . 0)
+ ("12" . 1)
+ ("7" . 2)
+ ("19" . 2)
+ ("5" . 3)
+ ("24" . 3)
+ ("4" . 4)
+ ("9" . 4)
+ ("16" . 4)
+ ("3" . 5)
+ ("2.7" . 6)
+ ("2.3" . 7)
+ ("2" . 8)))
+
+(define-public (ratio->fret ratio)
+ "Calculate a fret number given @var{ratio} for the harmonic."
+ (let* ((nom (numerator ratio))
+ (den (denominator ratio))
+ (index (+ (* (- den 2)
+ (- den 1)
+ 1/2)
+ nom -1)))
+ (number->string (vector-ref node-positions index))))
+
+(define-public (ratio->pitch ratio)
+ "Calculate a pitch given @var{ratio} for the harmonic."
+ (let* ((partial (1- (denominator ratio)))
+ (pitch (vector-ref partial-pitch partial)))
+
+ (ly:make-pitch (first pitch)
+ (second pitch)
+ (third pitch))))
+
+(define-public (fret->pitch fret)
+ "Calculate a pitch given @var{fret} for the harmonic."
+ (let* ((partial (assoc-get fret fret-partials 0))
+ (pitch (vector-ref partial-pitch partial)))
+
+ (ly:make-pitch (first pitch)
+ (second pitch)
+ (third pitch))))
+
+(define-public (calc-harmonic-pitch pitch music)
+ "Calculate the harmonic pitches in @var{music} given
+@var{pitch} as the non-harmonic pitch."
+ (let ((es (ly:music-property music 'elements))
+ (e (ly:music-property music 'element))
+ (p (ly:music-property music 'pitch)))
+ (cond
+ ((pair? es)
+ (ly:music-set-property! music 'elements
+ (map (lambda (x) (calc-harmonic-pitch pitch x)) es)))
+ ((ly:music? e)
+ (ly:music-set-property! music 'element (calc-harmonic-pitch pitch e)))
+ ((ly:pitch? p)
+ (begin
+ (set! p (ly:pitch-transpose p pitch))
+ (ly:music-set-property! music 'pitch p))))
+ music))
+
+(define-public (make-harmonic mus)
+ "Convert music variable @var{mus} to harmonics."
+ (let ((elts (ly:music-property mus 'elements))
+ (elt (ly:music-property mus 'element)))
+ (cond
+ ((pair? elts)
+ (map make-harmonic elts))
+ ((ly:music? elt)
+ (make-harmonic elt))
+ ((music-is-of-type? mus 'note-event)
+ (set! (ly:music-property mus 'articulations)
+ (append
+ (ly:music-property mus 'articulations)
+ (list (make-music 'HarmonicEvent))))))
+ mus))
projects / lilypond.git / blobdiff