Re: Cairo plans

[Han-Wen Nienhuys]

On Fri, Sep 3, 2021 at 11:22 AM Richard Shann <richard@rshann.plus.com> wrote:

> > Thank you! Previously I just hard-coded values for A4 paper but I
> > would
> > like to do it properly this time. I notice (peeking in scm/paper.scm)
> > that there is a Scheme symbol staff-space that holds this value, but
> > I
> > don't suppose there is a documented way of retrieving this value -
> > someone writing Lilypond by hand would not need it. In practice the
> > name is good enough I guess...
>
> No sooner have I written that than I found a heap of documentation
> ("internals") in which was:
>
>  staff-space (dimension, in staff space)
>
>     Amount of space between staff lines, expressed in global staff-
> space.
>
> Not that this makes much sense -  dimension, in staff space ... staff-
> space expressed in global staff-space?

This is normally 1.0, but if you have a book where some scores have a
differently sized staff, they will have a smaller number there.

IIRC, we scale up/down the units so they are expressed in staff space,
so if you do

(ly:output-def-lookup paper 'mm)

you'd get 1mm expressed in staff space
-- 
Han-Wen Nienhuys - hanwenn@gmail.com - http://www.xs4all.nl/~hanwen