Re: Understanding and modifying font nodes

[Alexander Kobel]

On 2015-04-26 01:05, Urs Liska wrote:
> I have wrapped around about anything I could think of, but I'm stuck and
> would greatly benefit of some help now.
>
> I'm working on the font interface and will (hopefully soon) present a
> patch that may improve font handling (with the new alternative fonts
> provided by Abraham) significantly. The last big obstacle is modifying
> the add-font procedure in font.scm to an "add-or-replace-font"
> behaviour. The idea is removing the annoying limitation that fonts can
> only be set once and not reset. In order to change anything one has to
> recreate the complete font-tree.

Hi Urs,

I agree that this is highly cumbersome. Not that it helps, but let me 
remark that some time ago I tried to achieve the same, and have not been 
successful.

On a different note, at least it looks as if by now we can remove that 
annoying manual font scaling for non-default global staff sizes by setting
  (/ (* staff-height pt) 2.5)
as a default factor. This remedies one of the potential user problems.

> It boils down that I simply don't understand what's going on inside the
> font nodes and how many of them are processed in the iterations,
> regardless how much debug printing I use to get to grips with it.

+1 from me... :-/


Best,
Alexander