gave me an idea that might be somewhat complicated and not particularly efficient, but it might be worth taking a look.
It would be nice to know the exact vertical position of the staff symbol(s) in a PDF, which is not possible so far. Use cases: vertically position inline-aligned snippets to the text's baseline, offsetting the first system on a page to have the stafflines align with the text.
It should be possible to have LilyPond record the Y-extent properties of all grobs in a system/Staff, then determine the largest and smallest numbers and store them in an aux file. If we know that the "absolute Y-extent" of a staff's grobs is e.g. #'(-5 . 6.3) we know that the score items go 4.3 staff spaces above and 3 staff spaces below the staff symbol, and we can somehow determine the vertical position of the staff symbol relative to the image file.
NOTE: I'm not sure how that would have to be handled with more than one staff per system, and Dynamics, and lyrics etc.
https://lists.gnu.org/archive/html/lilypond-user/2019-07/msg00300.html
gave me an idea that might be somewhat complicated and not particularly efficient, but it might be worth taking a look.
It would be nice to know the exact vertical position of the staff symbol(s) in a PDF, which is not possible so far. Use cases: vertically position inline-aligned snippets to the text's baseline, offsetting the first system on a page to have the stafflines align with the text.
It should be possible to have LilyPond record the
Y-extentproperties of all grobs in a system/Staff, then determine the largest and smallest numbers and store them in an aux file. If we know that the "absolute Y-extent" of a staff's grobs is e.g.#'(-5 . 6.3)we know that the score items go 4.3 staff spaces above and 3 staff spaces below the staff symbol, and we can somehow determine the vertical position of the staff symbol relative to the image file.NOTE: I'm not sure how that would have to be handled with more than one staff per system, and Dynamics, and lyrics etc.