Re: Stencils

[Han-Wen Nienhuys]

David Feuer wrote:
> On 4/6/06, Han-Wen Nienhuys <address@hidden> wrote:
>
> > They participate, in that their dimension fields are used for various
> > computations.  Simply said,  a stencil is a combination of output format
> > and a bbox.
>
> Once a stencil is constructed, is it ever adjusted?  That is, once the
> stencil is made, does Lilypond ever go back in and shift the contents
> around, or is it treated as a single unit from then on?

No it's read-only, so it's never changed.

> > > 2.  The more I read the code and think about it, the more I think
> > > stencil interpretation should be pushed to the back end and written in
> > > Scheme.
> > what exactly do you want to push back?
>
> The way I understand it, Lilypond constructs a stencil to represent an
> object, and the largest stencils (lines?  pages?) are then interpreted
> to produce output.  I suggest that the back ends should get the
> stencils themselves.

There's nothing against that, but it may have a performance impact if 
you do this. See stencil-interpret.cc for more info.

--

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

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