[Tex/LaTex] Getting bold digits with XeLaTeX and mathspec

boldfontsmath-modemathspecxetex

I'm trying to achieve something that I assumed was quite simple but it made me waste an insane amount of time so far.
I'm using XeLaTeX for a document and I'm setting “Arno Pro” as my font. I'm using the same font also for the math mode and I need a formula with bold digits.

MWE:

\documentclass{article}

\usepackage{amsmath}
\usepackage{mathspec}

\usepackage{xltxtra,xunicode}
\defaultfontfeatures{Mapping=tex-text}

\setmathsfont(Digits,Latin,Greek)[
Path = fonts/,Extension = .otf,
UprightFont=ArnoPro-Regular,
BoldFont=ArnoPro-Bold,
ItalicFont=ArnoPro-Italic,
BoldItalicFont=ArnoPro-BoldItalic,
Numbers={Proportional}
]{ArnoPro}

\setmathrm
[Path = fonts/,Extension = .otf,
UprightFont=ArnoPro-Regular,
BoldFont=ArnoPro-Bold,
ItalicFont=ArnoPro-Italic,
BoldItalicFont=ArnoPro-BoldItalic
]{ArnoPro}

\fontspec[Path=fonts/]{ArnoPro.otf}
\SetSymbolFont{Digits:m:n}{bold}{EU1}{\zf@family}{m}{n}

\begin{document}
\noindent
$\boldsymbol{bf\ 0123}$\\
$\mathbf{bf\ 0123}$\\
$normal\ 0123$\\
$\mathit{it\ 0123}$\\
$\mathrm{rm\ 0123}$

\end{document}

Now, this works almost perfectly except that only text and symbols are affected, no digits.

I have tried all sorts of combinations, including some with unicode-math, but to no avail.

What am I doing wrong?

Best Answer

mathspec is basically a collection of hacks; using a real Unicode Math font is better, if your document deals with mathematics.

However, here's a way to get bold digits:

\documentclass{article}

\usepackage{amsmath,bm}
\usepackage{mathspec}

\setmathsfont(Digits,Latin,Greek){FreeSerif}

\setmathrm{FreeSerif}

\setmainfont{FreeSerif}
\makeatletter
\SetSymbolFont{Digits:m:n}{bold}{EU1}{\eu@mathrm}{bx}{n}
\makeatother

\begin{document}

$\mathbf{x}=\bm{0}+\bm{1}$

\end{document}

I've used FreeSerif as I don't have Arno Pro.

enter image description here

A full example using instructions with explicit paths for the fonts:

\documentclass{article}

\usepackage{amsmath,bm}
\usepackage{mathspec}

\setmathsfont(Digits,Latin,Greek)[
  Path=/Library/Fonts/Kerkis-OTF/,
  Extension=.otf,
  UprightFont=Kerkis,
  ItalicFont=Kerkisitalics,
  BoldFont=Kerkisbold,
  BoldItalicFont=Kerkisbolditalic,
]{Kerkis}

\setmathrm[
  Path=/Library/Fonts/Kerkis-OTF/,
  Extension=.otf,
  UprightFont=Kerkis,
  ItalicFont=Kerkisitalics,
  BoldFont=Kerkisbold,
  BoldItalicFont=Kerkisbolditalic,
]{Kerkis}

\setmainfont[
  Path=/Library/Fonts/Kerkis-OTF/,
  Extension=.otf,
  Ligatures=TeX,
  UprightFont=Kerkis,
  ItalicFont=Kerkisitalics,
  BoldFont=Kerkisbold,
  BoldItalicFont=Kerkisbolditalic,
]{Kerkis}

\makeatletter
\SetSymbolFont{Digits:m:n}{bold}{EU1}{\eu@mathrm}{bx}{n}
\makeatother

\begin{document}

Abc\textit{abc}\textit{\textbf{abc}}

$\mathbf{x}=\bm{0}+\bm{1}$

$\mathit{xyz}$

\end{document}

enter image description here

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