在 TeX 中获取直立斜体字体

Question

我可以通过命令在 TeX 中获取斜体字体\it，但我看到书的第 13 页有直立斜体字体TeXbook。作者是如何实现这种风格的？

看到这些词

而斜体字母的绘制风格则有所不同。

在上图中。

Answer 1

教科书来源在 ctan 上，你会发现

Notice that two of these faces have an ``^{oblique}'' slope for emphasis:
{\sl ^{Slanted type} is essentially the same as roman, but the letters are
slightly skewed, \it while the letters in ^{italic type} are drawn in a
different style.} \ (You can perhaps best appreciate the difference between
the roman and italic styles by contemplating {\tenu letters that are
in an unslanted italic face.})

manmac.tex有

\font\tenu=cmu10 % unslanted text italic

因此以下纯文本文档

\font\tenu=cmu10 % unslanted text italic

Notice that two of these faces have an oblique slope for emphasis:
{\sl Slanted type is essentially the same as roman, but the letters are
slightly skewed, \it while the letters in italic type are drawn in a
different style.} \ (You can perhaps best appreciate the difference between
the roman and italic styles by contemplating {\tenu letters that are
in an unslanted italic face.})

\bye

---

在 LaTeX 中，斜体是ui字体形状，因此

\documentclass{article}

\begin{document}

\textit{slanted italic} {\fontshape{ui}\selectfont upright italic}

\end{document}

Answer 2

请注意，这是一个 LaTeX 答案，跟进了评论中的讨论大卫的回答。

cfr-lm\textui{}为拉丁现代提供\uishape，其中也包括这种形状。

\documentclass{article}

\usepackage{cfr-lm}


\begin{document}

Latin Modern also includes an \textui{upright italic} which is supported by \texttt{cfr-lm}.

{\itshape Some italic text of the regular sort, \upshape some upright and \uishape some upright italic.}
  
\end{document}