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I can not understand why all components of a beamer presentation are not showing (really empty frames) with this MWE

\documentclass{beamer}
%\usepackage{tikz}
\usepackage{polyglossia}
\setdefaultlanguage[numerals=maghrib]{arabic}
\setotherlanguage{english}
\newfontfamily\arabicfont[Script=Arabic]{Amiri}
\newfontfamily\arabicfontsf[Script=Arabic]{Amiri}

\title{\textenglish{Title of presentation}}
\date{\today}

\begin{document}

\begin{frame}
\maketitle
\end{frame}

\end{document}

If we add tikz package we obtain output satisfactory, this happen only if we define an RTL (right to left ) language as main language.

When removing the sign % before \usepackage{tikz} we obtain

enter image description here

Could one explain why is this happening, thanks.

Salim Bou
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1 Answers1

1

This is because versions (less than or equal to 18.3) of bidi package checked that if pgf package is loaded and then the bidi package would modify pgfpicture environment; this is what tikzpicture uses. However, beamer loads pgfcore package so the bidi package changes were not applied.

In version 18.4 of the bidi package, some improvements are made regarding the pgf and tikz packages; the bidi package now checks if the file pgfcorescopes.code.tex (where pgfpicture is defined) and changes the definition accordingly. So with your minimal example (without loading the tikz package):

\documentclass{beamer}
\usepackage{polyglossia}
\setdefaultlanguage[numerals=maghrib]{arabic}
\setotherlanguage{english}
\newfontfamily\arabicfont[Script=Arabic]{Times New Roman}
\newfontfamily\arabicfontsf[Script=Arabic]{Times New Roman}

\title{\textenglish{Title of presentation}}
\date{\today}

\begin{document}

\begin{frame}
\maketitle
\end{frame}

\end{document}

You get the following output:

enter image description here

which is exactly identical to your own image (except the font).

user91727
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