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选择 libertinus italic 加载粗体斜体字体

tag-icon • tag-icon fonts fontspec bold libertinus
选择 libertinus italic 加载粗体斜体字体

使用时libertinus字体并使用 进行编译xelatex，选择 sans italic 字体\textit会导致加载粗体斜体字体。为什么？

\documentclass{article}
\usepackage{fontspec}
\setmainfont{Libertinus Sans}

\begin{document}
Test

\textbf{Test}

\textit{Test}
\end{document}

在此处输入图片描述

Libertinus Sans Italic文件夹中有一个字体叫什么libertinus，按照文件来看好像是可以找到的.log：

.................................................
. fontspec info: "defining-font"
. 
. Font family 'LibertinusSans(0)' created for font 'Libertinus Sans' with
. options [Ligatures=TeX].
.  
.  This font family consists of the following NFSS series/shapes:
.  
. - 'normal' (m/n) with NFSS spec.: <->"Libertinus
. Sans/OT:script=latn;language=DFLT;mapping=tex-text;"
. - 'small caps'  (m/sc) with NFSS spec.: <->"Libertinus
. Sans/OT:script=latn;language=DFLT;+smcp;mapping=tex-text;"
. - 'bold' (bx/n) with NFSS spec.: <->"Libertinus
. Sans/B/OT:script=latn;language=DFLT;mapping=tex-text;"
. - 'bold small caps'  (bx/sc) with NFSS spec.: <->"Libertinus
. Sans/B/OT:script=latn;language=DFLT;+smcp;mapping=tex-text;"
. - 'italic' (m/it) with NFSS spec.: <->"Libertinus
. Sans/I/OT:script=latn;language=DFLT;mapping=tex-text;"
. - 'italic small caps'  (m/itsc) with NFSS spec.: <->"Libertinus
. Sans/I/OT:script=latn;language=DFLT;+smcp;mapping=tex-text;"
. - 'bold italic' (bx/it) with NFSS spec.: <->"Libertinus
. Sans/BI/OT:script=latn;language=DFLT;mapping=tex-text;"
. - 'bold italic small caps'  (bx/itsc) with NFSS spec.: <->"Libertinus
. Sans/BI/OT:script=latn;language=DFLT;+smcp;mapping=tex-text;"
.................................................

答案1

这似乎是 Libertinus Sans BoldItalic 中的一个错误：粗体斜体字体仅根据 OpenType 样式字段为斜体，因此 XeTeX 将其选为常规斜体字体。您可以使用以下方法覆盖此决定

\documentclass{article}
\usepackage{fontspec}
\setmainfont{Libertinus Sans}[
  ItalicFont={Libertinus Sans Italic}
]

\begin{document}
Test

\textbf{Test}

\textit{Test}
\end{document}

或者您可以切换到 LuaTeX：LuaTeX 字体加载器无论如何都会忽略相关的 OpenType 值，因此问题不会出现在那里。

答案2

\documentclass{article}
\usepackage[usefilenames]{libertinus-otf}
\renewcommand\familydefault{\sfdefault}
\begin{document}
    Test

    \textbf{Test}

    \textit{Test}
\end{document}

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