> Le 16 août 2022 à 21:14, lilyp...@lists.johnteskemusic.com a écrit :
>
>
> Of course, happy to give more context. I primarily write graphic scores (but
> with western notation symbols). The score isn't always static, so I want to
> be able to manipulate fragments of music after generation.
>
> In the past I have used my own program to place glyphs programmatically,
> which requires that I create my own notation<>glyph mappings and to have the
> engraving font installed/available to whoever views it.
>
> When I saw that Lilypond produces shapes in SVG output, not glyphs, I was
> intrigued--and leveraging Lilypond's input over my own mapping is appealing
> as well.
>
> I suppose one answer is keep my current system and outline the glyphs like
> Lilypond may be doing under the hood. Another is to make and group selections
> based on position, not an id attribute, from the current Lilypond output.
>
Thanks both for your explanations. Is it not possible to use attributes without
collapsing different <g> tags into one? John, you have a command that does not
work in a comment in your original example, and it does not work because
markups are a standalone system for creating any graphics you like, where there
are no grobs, but it is possible to implement a markup command that sets
attributes as well. Untested (I’m on vacation), but I think this should work:
#(define-markup-command (with-output-attributes attrs arg) (list? markup?)
(let ((stil (interpret-markup layout props arg)))
(ly:make-stencil (list 'output-attributes attrs (ly:stencil-expr stil))
(ly:stencil-extent stil X) (ly:stencil-extent
stil Y))))
\markup \combine a \with-output-attributes #'((mylayer . 4)) { b c }
> Hi,
>
> I'm new to Lilypond and am trying to generate SVG output for use elsewhere.
> In general I'd like to create fragments of music and add ids to each group.
> So far I've seen that each grob is output as its own <g>--is there a way to
> group at a higher level, say markup, staff, etc.?
>
> John
> \version "2.22.2"
> \markup {
> % with SVG output this is two <g>: notehead and dot
> % \override NoteHead.output-attributes.id = 123
> \note {4.} #0
> }
>
> There isn’t a simple way to do this. I wonder what leads you to this
> question, though. Could you explain the purpose for which you would like this
> type of output? There may be a different way to solve your problem. See also:
> https://en.m.wikipedia.org/wiki/XY_problem
>
