Re: Incipits

[Nicolas Sceaux]

Le 3 févr. 08 à 22:08, Nicolas Sceaux a écrit :

> Le 3 févr. 08 à 21:07, Till Rettig a écrit :
>
> > Whow, this is really great. I guess from that base it is somehow  
> > simple to have also
> > changing of notehead/flags etc styles possible -- and not to  
> > forget: for most socres
> > of renaissance music the ligature-engraver will have to be added to  
> > the score and
> > the ligature bracket engraver removed (which will have to be  
> > restored for the main
> > score, where there are usually notated as brackets to indicate the  
> > original ligatures).
>
> My first idea was that the note head, clef, etc, styles and the
> engraver settings would be set in the \incipit functions: it would be
> up to the user to define a custom \incipit function based on the
> default one. But maybe, using an IncipitStaff context, which  
> properties
> would be overridden in the score layout block, that could be done more
> easily. That's what I'll try.
>
> But there are some flaws in the instrument name hack appraoch. The  
> notes
> are not aligned (which may or may not be a problem), and the alignment
> of the incipit with the staff is manually tuned (hence the use of two
> \incipit and \vocalIncipit functions is the example).

Here is draft patch: the Instrument_name engraver is used to create an
Incipit grob before the first line when an incipit has been specified.
There are several problems in it:

 - how can I access the paper object from the engraver? I need a scaled
output definition to format the incipit score. There are paper_ slots in
Book and Paper_book classes, but I don't see how to get there from an
engraver. As a workaround, I used a context property to pass the
$defaultpaper object to the engraver, but that sucks.

 - there is a garbage problem:
programming error: Parsed object should be dead: static  
scm_unused_struct* Prob::mark_smob(scm_unused_struct*)
How do people usually track this kind of issue? (I tried to unprotect  
some
objects, but this last one is still missing).


Example:

\score {
  \new StaffGroup <<
    \new Staff <<
      \set Staff.instrumentName = \markup Toto
      \incipit <<
        \new MensuralVoice = "incipit" { \clef "neomensural-c1" c'4  
d' e' f' }
        \lyricsto "incipit" \new Lyrics \lyricmode { do ré mi fa }
      >>
      \new Voice = melody { \clef "treble" c'4 d' e' f' c'1 }
      \lyricsto melody \new Lyrics \lyricmode { do ré mi fa }
    >>
    \new Staff <<
      \set Staff.instrumentName = \markup Titi
      \incipit { c'2 g'2 }
      { \clef "alto" c'2 g'2 c'1 }
    >>
    \new Staff <<
      \set Staff.instrumentName = \markup Tutu
      \set Staff.incipitStaffType = #'VaticanaStaff
      \incipit { c'4 g c'2 }
      { \clef "alto" c'4 g c'2 c'1 }
    >>
  >>
  \layout {
    indent = 5\cm
    ragged-right = ##t
  }
}

incipit3.patch
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