XeTeX ⇒ Special Characters not printed with Gentium Font

[rapante-rapante]

Hi there,

I'm fairly new to {Xe|La}TeX, basically I use it only indirectly via emacs' org-mode. The problem is that UTF-8 input such as arrows (→, right arrow, [Compose]+i on Ubuntu/Gnome) doesn't show up in the result, whereas

Code: Select all

\rightarrow

does. At the same time, no problems occur with IPA characters (ʔ, ŋ, etc.).

What could be the problem?

I'm attaching a MWE that, while not made with org-mode, shows the same symptoms and may be due to the same cause.

Code: Select all

\documentclass[11pt,a4paper]{article}
\usepackage{xltxtra}
\setmainfont[Mapping=tex-text]{Gentium}
\begin{document}
\defaultfontfeatures{Mapping=tex-text}
\setromanfont{Gentium}

ng: ŋ \\
glottalStop: ʔ \\
rightarrow: → \\
tex rightarrow: $\rightarrow$ \\

\end{document}

[Stefan Kottwitz]

Obviously the Gentium font doesn not support that character. If you would remove the Gentium lines, the right arrow symbol would appear.

Stefan

[rapante-rapante]

Thank you!
I simply assumed that Gentium would support anything outside [a-zA-z0-9], since that's what is purported. Switching to Linux Libertine O yields the desired result plus the surprise of two different rightarrows. For reference's sake:

Code: Select all

\documentclass[11pt,a4paper]{article}
\usepackage{fontspec}
\usepackage{xltxtra}
\setromanfont[Mapping=tex-text]{Linux Libertine O}
\begin{document}

ng: ŋ \\
glottalStop: ʔ \\
rightarrow: → \\
tex rightarrow: $\rightarrow$ \\

\end{document}

Cheers!