1 %% Do not edit this file; it is automatically
2 %% generated from LSR http://lsr.dsi.unimi.it
3 %% This file is in the public domain.
7 lsrtags = "rhythms, tweaks-and-overrides"
10 The @code{flag} property of the Stem grob can be set to a custom scheme
11 function to generate the glyph for the flag.
14 doctitle = "Generating custom flags"
17 #(define-public (weight-flag stem-grob)
18 (let* ((log (- (ly:grob-property stem-grob 'duration-log) 2))
19 (is-up? (eqv? (ly:grob-property stem-grob 'direction) UP))
20 (yext (if is-up? (cons (* log -0.8) 0) (cons 0 (* log 0.8))))
21 (flag-stencil (make-filled-box-stencil '(-0.4 . 0.4) yext))
22 (stroke-style (ly:grob-property stem-grob 'stroke-style))
23 (stroke-stencil (if (equal? stroke-style "grace")
24 (make-line-stencil 0.2 -0.9 -0.4 0.9 -0.4)
26 (ly:stencil-add flag-stencil stroke-stencil)))
29 % Create a flag stencil by looking up the glyph from the font
30 #(define (inverted-flag stem-grob)
31 (let* ((dir (if (eqv? (ly:grob-property stem-grob 'direction) UP) "d" "u"))
32 (flag (retrieve-glyph-flag "" dir "" stem-grob))
33 (line-thickness (ly:staff-symbol-line-thickness stem-grob))
34 (stem-thickness (ly:grob-property stem-grob 'thickness))
35 (stem-width (* line-thickness stem-thickness))
36 (stroke-style (ly:grob-property stem-grob 'stroke-style))
37 (stencil (if (null? stroke-style)
39 (add-stroke-glyph flag stem-grob dir stroke-style "")))
40 (rotated-flag (ly:stencil-rotate-absolute stencil 180 0 0)))
41 (ly:stencil-translate rotated-flag (cons (- (/ stem-width 2)) 0))))
43 snippetexamplenotes = { \autoBeamOff c'8 d'16 c'32 d'64 \acciaccatura {c'8} d'64 }
46 \override Score.RehearsalMark #'self-alignment-X = #LEFT
51 \mark "Custom flag: inverted"
52 \override Stem #'flag = #inverted-flag
55 \mark "Custom flag: weight"
56 \override Stem #'flag = #weight-flag
59 \mark "Revert to normal"