在 LaTeX-Beamer 中包含并编辑 pdf

Question

不久前我写了一些代码用于注释图像，同样适用于在 Beamer 中注释 PDF 文件。我的宏定义了一个AnnotatedImage环境，其中坐标被缩放，以便矩形图像适合适当缩放的单位正方形，这使得在图像上绘图非常容易。例如，您可以生成以下“Beamer 幻灯片”

使用本质上的代码：

  \begin{AnnotatedImage}[width=0.8]{abacus.pdf}
    \draw[red, rounded corners, thick](0.2,0.85) rectangle(0.5,0.71);
    \draw[<-,red](0.2,0.78)--++(-0.1,0);
  \end{AnnotatedImage};

[这个 MWE 无法编译，因为我abacus.pdf在电脑上使用了一个随机 PDF 文件，而你不会看到这个……不幸的是，像这样的好包姆韦不提供 PDF 文件。] 环境的可选参数允许您设置图像尺寸，并且在环境中，您可以使用任意蒂克兹命令。此外，还有一个\annotate命令。请参阅带有一些叠加文本的图像更多细节。

对于多页 PDF 文件，这几乎肯定行不通，但如果您提取要注释的页面，它就会起作用。另一个选择是使用pdf页面仅提取您需要的页面。如果您需要这个，请告诉我，因为修改我的代码以使用应该不难pdf页面直接地。

完整代码如下：

\documentclass{beamer}
\usepackage{tikz}
\usepackage{xparse}

\tikzset{% styling for the overlay
  annotatedImage/x/.initial = 0.7,% default overlay position
  annotatedImage/y/.initial = 0.7,
  annotatedImage/width/.initial = 1,% default image width
  annotatedImage/.unknown/.code = {% unknown keys are appended to style
    % to append to a style we need to expand everything first
    \edef\tikzappend{\noexpand\tikzset{annotatedImage/.append style =
                {\pgfkeyscurrentname=\pgfkeyscurrentvalue}}}
    \tikzappend
  },
  annotatedImage/.style = {% default overlay style
    draw=red, ultra thick, rounded corners, rectangle,
  }
}

\newsavebox\annotatedImageBox% need to calculate the width and height

% internal helper functions
\newcommand\AnnotatedImageVal[1]{\pgfkeysvalueof{/tikz/annotatedImage/#1}}
\newcommand\SetUpAnnotatedImage[2]{% set keys and dimensions to scale image
    \tikzset{annotatedImage/.cd, #1}%
    \sbox\annotatedImageBox{\includegraphics[width=\AnnotatedImageVal{width}\textwidth,
                                          keepaspectratio]{#2}}%
    \pgfmathsetmacro\annotatedHeight{\ht\annotatedImageBox/28.453}% convert from px to a tikz length
    \pgfmathsetmacro\annotatedWidth{\wd\annotatedImageBox/28.453}%
}

% usage: \annotatedImage[node options]{image}{text}
\NewDocumentCommand\annotatedImage{ O{} m m}{%
  \bgroup% start a group to keep tikz changes local
    \SetUpAnnotatedImage{#1}{#2}%
    \begin{tikzpicture}[xscale=\annotatedWidth, yscale=\annotatedHeight]%
        \node[inner sep=0, anchor=south west] (image) at (0,0) {\usebox{\annotatedImageBox}};
        \node[annotatedImage] at (\AnnotatedImageVal{x},\AnnotatedImageVal{y}) {#3};
    \end{tikzpicture}%y
  \egroup%
}

% usage: \annotate <insert favourite node commands>;
\newcommand\annotate[1][]{\node[annotatedImage,#1]}

% usage: \begin{AnnotatedImage][width(default 1)]{image} tikz commands....\end{AnnotatedImage}
\newenvironment{AnnotatedImage}[2][1]{%
  \SetUpAnnotatedImage{#1}{#2}%
  \tikzpicture[xscale=\annotatedWidth, yscale=\annotatedHeight]
    \node[inner sep=0, anchor=south west] at (0,0) {\usebox{\annotatedImageBox}};
}{\endtikzpicture}


\begin{document}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}{PDF example}

  \begin{AnnotatedImage}[width=0.8]{abacus.pdf}
    \draw[red, rounded corners, thick](0.2,0.85) rectangle(0.5,0.71);
    \draw[<-,red](0.2,0.78)--++(-0.1,0);
  \end{AnnotatedImage};

\end{frame}

\end{document}

Answer 1