Hi Klose,
Here's a possibility (v.2.19) :
%%%%%
\version "2.19"
%% Defs:
#(define-markup-command (gClef layout props thk mlt) (number? number?)
(interpret-markup layout props
(markup
(#:stencil
(make-path-stencil
'(M 1.117 -2.778
C 0.73 -2.782 0.363 -2.364 0.484 -1.981
C 0.566 -1.641 1.043 -1.54 1.285 -1.786
C 1.504 -1.997 1.418 -2.395 1.141 -2.513
C 0.996 -2.567 0.836 -2.583 1.09 -2.614
C 1.379 -2.673 1.703 -2.559 1.828 -2.278
C 1.969 -1.911 1.82 -1.395 1.766 -1.024
C 1.031 -1.169 0.277 -0.903 0.031 -0.196
C -0.129 0.323 -0.043 0.917 0.25 1.366
C 0.492 1.737 0.832 1.999 1.152 2.3
C 1.07 2.886 1 3.468 1.203 4.034
C 1.297 4.292 1.484 4.503 1.68 4.687
C 1.898 4.886 2.117 4.335 2.211 4.062
C 2.398 3.601 2.227 2.839 1.934 2.323
C 1.816 2.105 1.637 1.929 1.457 1.757
C 1.5 1.523 1.539 1.288 1.586 1.054
C 2.117 1.077 2.477 0.792 2.602 0.359
C 2.766 -0.134 2.516 -0.766 1.953 -0.977
C 2.004 -1.423 2.16 -1.927 2.004 -2.313
C 1.902 -2.567 1.656 -2.766 1.379 -2.778
C 1.293 -2.798 1.203 -2.79 1.117 -2.782
M 1.734 -0.919
C 1.621 -0.306 1.574 0.026 1.5 0.464
C 1.164 0.433 0.973 0.066 1.09 -0.22
C 1.141 -0.345 1.223 -0.407 1.359 -0.485
C 1.492 -0.563 1.387 -0.657 1.297 -0.618
C 1.031 -0.509 0.664 -0.188 0.758 0.269
C 0.816 0.569 1.059 0.917 1.398 1.023
C 1.359 1.261 1.332 1.378 1.297 1.612
C 0.887 1.234 0.332 0.753 0.348 0.155
C 0.363 -0.532 0.746 -1.071 1.734 -0.919
M 1.688 0.48
C 1.762 0.105 1.844 -0.509 1.926 -0.88
C 2.656 -0.462 2.438 0.534 1.688 0.48
M 2.016 3.776
C 1.984 4.378 1.691 4.058 1.5 3.706
C 1.313 3.366 1.273 2.894 1.352 2.468
C 1.945 3.066 2.031 3.409 2.016 3.776
Z)
thk mlt mlt #t)))))
\layout {
\context {
\Score
\override Clef.stencil =
#(lambda (grob)
(let* ((sz (ly:grob-property grob 'font-size 0.00))
(mlt (magstep sz))
(glyph (ly:grob-property grob 'glyph-name)))
(cond
((equal? glyph "clefs.G")
(grob-interpret-markup grob
(markup #:scale(cons mlt mlt)#:gClef 0 1)))
((equal? glyph "clefs.G_change")
(grob-interpret-markup grob
(markup #:scale(cons mlt mlt)#:gClef .01 .8)))
(else (ly:clef::print grob)))))
\override ClefModifier.extra-offset = #'(.3 . 0)
}
}
%% Test:
{ c' }
%%%%