garamond-libre and small caps

Question

I want to use the Garamond font provided by the garamondlibre package. Unfortunately, it appears that the small caps cause some issues: One minor issue is that \textsc{ff} produces an ff-ligature that uses the usual lowercase letters; I could fix this by disabling ligatures for scshaped text (see below). However, the following minimal example involving the character ‘ü’

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{microtype}
\DisableLigatures{shape=sc}
\usepackage{garamondlibre}

\begin{document}
\textsc{Aufführung}
\end{document}

produces the following result:

Theoretically, I can cheat by using the amsmath package and instead write

\textsc{Auff$\ddot{\textsc{u}}$hrung}

This actually looks quite nice (even though the dots are not fully centered):

I could also use the OT1-option for the fontenc package, but this produces way too high dots:

Is there a better way to fix this?

Answer 1

As many other fonts for pdflatex, GaramondLibre is obtained by converting an OpenType font with otftotfm (as stated in the documentation of garamondlibre.

If we run the following code with LuaLaTeX or XeLaTeX

\documentclass{article}
\usepackage{garamondlibre}

\begin{document}

\textsc{Aufführung}

\end{document}

we see that the problem is exactly the same:

Small caps are only available for the unadorned Latin Letters, I'm afraid. The automatic conversion from the OpenType font does the same as the smcp OpenType feature: it queries the specific table for a variant glyph and, upon not finding it, the normal glyph is returned.

Sorry, but there's no chance of making it work unless the OpenType font is fixed by adding at least the most common letters with diacritics and the conversion to legacy TFM fonts is redone.

Just for completeness, I add the output of

Aufführung

\textsc{Aufführung}

first with garamondlibre

and then with ebgaramond

In either case, \usepackage[T1]{fontenc} was used.

Answer 2

If it's just a one-off, rather than extending the font., you could break the ff ligature and position the accent over a normal u. As this is using the Unicode combining accent not a classic TeX \accent it will still cut and paste correctly as AUFFÜHRUNG

With lualatex:

\documentclass{article}
\usepackage{garamondlibre}

\begin{document}

\textsc{Aufführung}

\textsc{Auf\/f\"{\/u\kern-.05em}̈\kern.05em hrung}

\end{document}