Re: Arbitrary accidental glyphs

[Graham Breed]

Han-Wen Nienhuys wrote:
> Ah, ok.  The problem is that the Pango font is 'virtual': pango
> decomposes the string into sections each of which can use a different
> font.

Oh, it is?  What do we do about it?

I found this in a file which I did get to work (in the sense 
of producing Sagittal symbols, not making any sense as 
notation) which is the same kind of thing:

/Sagittal 4.21679688 output-scale div selectfont
0.9902 0.0000 /boathookandarcdoubledown
1.0584 0.0000 /doubleleftboathookdoubledown
1.0584 0.0000 /arcandbarbdown
0.7512 0.0000 /leftscrollandboathookdoubledown
0.7512 0.0000 /leftarcandbarbdown
0.5121 0.0000 /space
0.7512 0.0000 /leftscrollandboathookdoubledown
1.0584 0.0000 /doubleleftboathookdoubledown
1.0584 0.0000 /doubleleftboathookdoubledown
0.8194 0.0000 /leftarcdoubledown
0.7512 0.0000 /rightarcdoubledown
11 print_glyphs

There's a load of other code in there to define the font.

This is the LilyPond file behind it (based on an example 
from the list, and obviously it won't work without the 
Sagittal font installed):

\version "2.11.52"
\relative c'{
\override Accidental #'font-name = #"Sagittal"
b
\once \override Accidental #'stencil = #ly:text-interface::print
\once \override Accidental #'text = \markup{"hello world"}
cis d e f g f e d c1 }


              Graham


> On Sat, Jul 19, 2008 at 10:51 AM, Graham Breed <address@hidden> wrote:
> > Han-Wen Nienhuys wrote:
> > > On Thu, Jul 17, 2008 at 11:10 AM, Graham Breed <address@hidden> wrote:
> > >
> > > >     \override Accidental #'font-name = #"Sagittal"
> > > >
> > > > in a script, and characters from Accidental's glyph-name-alist can come
> > > > from
> > > > Sagittal.  The problem is that LilyPond can't retrieve named glyphs from
> > > > a
> > > > non-standard font.
> > > that's wierd.  Lily basically outputs
> > >
> > >  /glyphname showglyph
> > >
> > > Postscript code, so it should work for any font that has glyph names.
> > The code is (scm/output-ps.scm)
> >
> >
> > (define (named-glyph font glyph)
> >  (ly:format "~a /~a glyphshow " ;;Why is there a space at the end?
> >             (ps-font-command font)
> >             glyph))
> >
> >
> > So it's also trying to output a description of the font, which expands to
> > include the filename, and a Pango_font doesn't have one.  Changing it to
> >
> >
> > (define (named-glyph font glyph)
> >  (ly:format "/~a glyphshow" glyph))
> >
> >
> > means no error gets generated but the output has things like this:
> >
> >
> > /noteheads.s2 showglyph
> > 458.9567 -744.0706 moveto
> > 0.0500 3.2322 -0.0250 -2.2722 0.0800 draw_round_box
> > 9.3556 -746.5706 moveto
> > /sharp showglyph
> >
> >
> > It's trying to print the accidentals with the same font as the note heads.
> >  The result is garbage.  So how do we tell it to use the Pango_font?
> >
> >
> >                  Graham