Re: Optical size information in Emmentaler-nn OpenType fonts

[Werner LEMBERG]

> I have an Adobe OpenType font family containing its font faces in
> four sets: text, caption, subhead and display, each set designed for
> use at different point sizes.  I assume the different Emmentaler-nn
> fonts serve the same purpose.

Sort of, yes.

> If I use this Adobe font with LaTeX and fontspec it selects the
> right font automatically depending on the point size.  [...]  I
> opened both fonts with FontForge but didn't find a setting that
> seems responsible, and I don't really know anything about the inner
> workings of OpenType (or any) font technologies.

Aah.  Look up the `size' feature on this page:

  http://www.microsoft.com/typography/otspec/features_pt.htm

I wasn't aware that such a feature exists.  The necessary information
could be rather easily added using FontForge, I think.  Your request
definitely deserves a new issue in our tracker. :-)

> Would it make sense to add this?

Yes.  Unfortunately, it seems that Pango doesn't support this
currently out of the box (I've just asked on the gtk-i18n-list to be
sure) which means that lilypond doesn't directly benefit.


    Werner