Two interesting-looking functions (ly:get-glyph,
ly:font-get-glyph) are listed here...
http://lilypond.org/doc/v2.12/Documentation/user/lilypond-internals/Scheme-functions
...but I can't seem to get them to do anything.
It says that each can "Retrieve a stencil", which
strikes me as useful. I was actually looking for
a scheme-way of accessing stencils, but the function
description is bewildering to me.
Can I somehow use it like this...
\once \override NoteHead #'stencil = #(ly:get-glyph font index)
?
Is font a string, symbol, or an actual font?
Is index a number? How do I know what number
a particular glyph is? How does this work???
None of these seemed to work (don't laugh, but
I'm seriously stabbing in the dark here):
(ly:font-get-glyph 'Emmentaler '"Half notehead")
(ly:font-get-glyph 'Emmentaler 'sm1)
(ly:font-get-glyph 'fetaMusic '"Half notehead")
(ly:font-get-glyph 'fetaMusic 'sm1)
(ly:get-glyph "emmentaler-20" 5)
(ly:get-glyph "emmentaler-20" "noteheads.s1")
(ly:get-glyph 'emmentaler-20 'noteheads.s1)
(ly:get-glyph "fetaMusic" 5)
(ly:get-glyph 'fetaMusic 'noteheads.s1)
Also, this warning came up alot:
warning: type check for `stencil' failed;
value `#<unspecified>' must be of type `unknown'
What does this mean? Does the parser freak out
if it knows what the stencil-type is? Is there
some sort of ly:unspecified->unknown procedure?
Looking forward to learning...
- Mark
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