图片背后有水印

Question

我使用了主题中的代码：图像类似水印

最小代码：

\documentclass[a4paper,twoside,8pt]{article}
\usepackage{graphicx}
\usepackage{tikz,everypage}
\usepackage{lipsum}
\newcommand*{\Placing}[3]{%
  % #1 = x (from south west corner of page
  % #2 = y
  % #3 = content
  \AddThispageHook{%
      \begin{tikzpicture}[remember picture,overlay]
          \draw (current page.south west) ++(#1,#2) node {#3};%
      \end{tikzpicture}
  }%
}
\begin{document}
\Placing{4.8cm}{22.0cm}{\includegraphics[height=3cm,angle=45]{example-image-c}}
  \lipsum[4]

  \centering
  \includegraphics[height=5cm]{example-image-a}

 \lipsum[4]
\Placing{7.8cm}{17.0cm}{\includegraphics[height=3cm,angle=45]{example-image-b}}

\end{document}

但水印（图像 B、C）位于图像 A 后面。

我怎样才能在图片 A 上添加水印 (B,C)？谢谢

Answer 1

那么你的水印应该位于背景中的文本后面。因此，如果它们应该位于图像 A 上方，则图像 A 也必须位于背景中（这需要两次编译）：

\documentclass[a4paper,twoside,8pt]{article}
\usepackage{graphicx}
\usepackage{tikz,everypage}
\usepackage{lipsum,zref-savepos}
\newcommand*{\Placing}[3]{%
  % #1 = x (from south west corner of page
  % #2 = y
  % #3 = content
  \AddThispageHook{%
      \begin{tikzpicture}[remember picture,overlay]
          \draw (current page.south west) ++(#1,#2) node {#3};%
      \end{tikzpicture}
  }%
}
\begin{document}
\AddThispageHook{%
   \begin{tikzpicture}[remember picture,overlay]
          \draw (current page.south west) ++(\zposx{picture}sp,\zposy{picture}sp) 
          node[inner sep=0pt,anchor=south west] {\includegraphics[height=5cm]{example-image-a}};%
   \end{tikzpicture}}

\Placing{4.8cm}{22.0cm}{\includegraphics[height=3cm,angle=45]{example-image-c}}


\Placing{4.8cm}{22.0cm}{\includegraphics[height=3cm,angle=45]{example-image-c}}
  \lipsum[4]

  \centering
  \leavevmode\zsavepos{picture}\phantom{\includegraphics[height=5cm]{example-image-a}}

 \lipsum[4]
\Placing{7.8cm}{17.0cm}{\includegraphics[height=3cm,angle=45]{example-image-b}}

\end{document}