Re: Getting the height of a system.

[Han-Wen Nienhuys]

Han-Wen Nienhuys schreef:

> > 3) for each possible system, using the original grobs,
> >     - work out the Y-extent
> >     - restore () every grob in that system
> >
> > The advantage is that we avoid fiddling around with the object_alist_ 
> > because this clone is never used -- it exists only to save the state 
> > of the score before we mess it up with calling Y-extent. We also only 
> > have to make one copy of the system and restore it N times instead of 
> > making N copies.

I don't think that this will really help. Inside the grobs, the 
object_alist_ will contain grob_arrays, which are considered 'private 
data' to each grob, and hence need to be copied completely before each 
new System formatting step. This is expensive, as the length of the 
grob_arrays is proportional to the entire score.



--

Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen

LilyPond Software Design
 -- Code for Music Notation
http://www.lilypond-design.com