Re: Wrong `\figured-bass` markup rendering in documentation

[Jean Abou Samra]

Le 09/01/2023 à 19:26, Jonas Hahnfeld a écrit :
> I build the documentation in a Docker container, steered by
> release/doc/build-doc.sh and documented in the CG. It is veeery
> unlikely that there is anything to this theory.


Right.

I did a quick test with


\markup
$(markup-lambda (layout props arg) (markup?)
  (let ((stil (interpret-markup layout props arg)))
    (pretty-print (ly:stencil-expr stil))
    stil))
\override #(quote ((font-encoding . fetaText)
                   (font-features . ("dlig"))))
{
"9" "9\\"
}


With official 2.24.0 binaries, I get

(utf-8-string

"emmentaler-20 7.029296875"

"9\\"

(translate-stencil

(0.0 . 0.0)

(glyph-string

#<Pango_font (#f . 1.0)>

"Emmentaler-20"

7.029296875

#f

((1.604735433070866

(-0.3880133443036417 . 2.0000509104330706)

0.0

0.0

"figbass.ninestroked"))

"/home/jean/lilies/2.24.0/share/lilypond/2.24.0/fonts/otf/emmentaler-20.otf"

0

"9\\"

((2 . 1)))))

(utf-8-string

"emmentaler-20 7.029296875"

"9"

(translate-stencil

(0.0 . 0.0)

(glyph-string

#<Pango_font (#f . 1.0)>

"Emmentaler-20"

7.029296875

#f

((1.3657322834645669

(0.0 . 2.0000509104330706)

0.0

0.0

"nine"))

"/home/jean/lilies/2.24.0/share/lilypond/2.24.0/fonts/otf/emmentaler-20.otf"

0

"9"

((1 . 1)))))

but when building inside the Docker container, I get

(utf-8-string "emmentaler-20 7.029296875" "9\\" (combine-stencil 
(translate-stencil (1.3657322834645669 . 0.0) (glyph-string #<Pango_font 
(#f . 1.0)> "C059-Roman" 7.029296875 #f ((2.424174803149606 (0.0 . 
2.936324409448819) 0.0 0.0 "backslash")) 
"/usr/share/fonts/otf/C059-Roman.otf" 0 "\\" ((1 . 1)))) 
(translate-stencil (0.0 . 0.0) (glyph-string #<Pango_font (#f . 1.0)> 
"Emmentaler-20" 7.029296875 #f ((1.3657322834645669 (0.0 . 
2.014455118110236) 0.0 0.0 "nine")) 
"/tmp/lilypond-2.25.1/out/share/lilypond/current/fonts/otf/emmentaler-20.otf" 
0 "9" ((1 . 1)))))) (utf-8-string "emmentaler-20 7.029296875" "9" 
(translate-stencil (0.0 . 0.0) (glyph-string #<Pango_font (#f . 1.0)> 
"Emmentaler-20" 7.029296875 #f ((1.3657322834645669 (0.0 . 
2.014455118110236) 0.0 0.0 "nine")) 
"/tmp/lilypond-2.25.1/out/share/lilypond/current/fonts/otf/emmentaler-20.otf" 
0 "9" ((1 . 1)))))

It seems that with the versions of Pango/Fontconfig in this Docker image,

the backslash character, which doesn't exist in Emmentaler, causes a 
fallback

text font to be used, which obviously defeats the Emmentaler OTF feature

that causes "9" and "\" to be combined specially.

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