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Re: NR 4.2.2, table column should be called "glyph name"?

From: tisimst
Subject: Re: NR 4.2.2, table column should be called "glyph name"?
Date: Mon, 12 Jun 2017 08:57:55 -0700 (MST)

On Mon, Jun 12, 2017 at 6:18 AM, Carl Sorensen-3 [via Lilypond] <
address@hidden> wrote:

> On 6/12/17 4:06 AM, "Federico Bruni" <[hidden email]
> <http:///user/SendEmail.jtp?type=node&node=203732&i=0>> wrote:
> >
> >
> >Il giorno sab 10 giu 2017 alle 2:54, Carl Sorensen <[hidden email]
> <http:///user/SendEmail.jtp?type=node&node=203732&i=1>>
> >ha scritto:
> >> On 6/8/17 10:26 AM, "Federico Bruni" <[hidden email]
> <http:///user/SendEmail.jtp?type=node&node=203732&i=2>> wrote:
> >>> Should "font name" be replaced with "glyph name"?
> >>
> >> Not in my opinion.  The font is feta11 (the font family is feta).  The
> >> staff height is 11.22 pt.  The staff height is 3.9 mm.
> >>
> >>
> >
> >Hi Carl, are you sure?
> >The context of my report was:
> >
> >commit 18d03fa6a724b0102ccc47d194209802cea02f2e
> >Author: James Lowe
> >Date: Sun Mar 5 16:34:39 2017 +0000
> >
> >    Doc - NR + CG: Clarify Emmentaler is the 'font' and Feta/Parmesan
> >are glyphs
> >
> >    Issue 4966
> >
> >    Distinguish between Emmentaler
> >    the 'font' and Feta/Parmesan
> >    glyphs that make up the
> >    Emmentaler font family.
> In this context, I guess that the proper word is 'subfont' rather than
> 'glyph'.  The emmentaler font is made up of several subfonts, according to
> the files in the out/mf directory.  In the case of emmentaler-11 (which is
> the font), the subfonts include
> feta11
> feta-noteheads11
> feta-flags11
> parmesan11
> parmesan-noteheads11
> feta-alphabet11
> Each of these subfonts is a collection of glyphs.  And the glyphs have
> individual names.
> If I were to try to fix the problem you have identified, I would probably
> change the contents of the first column from 'fetaxx' to 'emmentaler-xx'.

Having delved into the depths of the way fonts are created and work in
LilyPond, I agree that this is the most precise correction here. I guess
the only question is should it be "emmentaler-xx" (which is the font file
name) or "Emmentaler-xx" (which is the internal font name). Which is the
correct reference? It's a small detail, but perhaps it's best to get it
right and be done with it.

I believe that when one sets the font-size in general, it applies to
> Emmentaler, not to Feta.  The only place I have found in the documentation
> that uses anything other than the whole font is in NR 1.8.3, where some
> font-encodings are used.  But I cannot find any documentation that
> describes which glyphs are in which encodings, so I don't know how to use
> this in general.

The three encodings are basically as follows:
- fetaText: all alpha-numeric glyphs (i.e., /space, 0-9, and the letters f,
m, p, r, s, z).
- fetaBraces: all grand-staff brace glyphs (all of which are found in the
font "emmentaler-brace")
- fetaMusic: every other glyph, including those found in the "parmesan"
sub-set of glyphs.

I suppose this would be good information to have documented somewhere.

Also, I wonder if a new entry should be in the "Entire Document Fonts"
sub-section to describe the usage of set-global fonts? I can't say it
should completely replace the make-pango-font-tree example, but there isn't
an entry for set-global-fonts anywhere at the moment.

> So, in looking at all of this, my recommendation is not to change the
> heading of the table, but to change the contents of the first column.


On a side, but related, note, the whole business with using the names
"feta" and "emmentaler" interchangeably is a bit confusing all throughout
the code. For example, the use of 'feta as the font-family symbol for the
music font. Why not just call it 'music? The three main encodings could
then be 'musicText, 'musicBraces, and 'musicSymbol (I've not bought-off
that last one). Perhaps it's just me coming from the world were other music
fonts are now available. After all, we use the more generic terms 'roman,
'sans, 'typewriter for the main text font-families.

That's all for now.


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