latex - Beamer中的半透明图形(pdflatex)

Question

我正在尝试使用图形覆盖，以免自己为每张幻灯片创建不同的图像。叠加层适用于我包含的任何文本，但不适用于图形。例如:

\setbeamercovered{dynamic}
\begin{figure}\resizebox{10.0cm}{!}{
        \includegraphics{problem-a.pdf}
        Test A
        \pause
        \includegraphics{problem-b.pdf}
        Test B
        \pause
        \includegraphics{problem-c.pdf}
        Test C
}\end{figure}

文本“测试B”和“测试C”的结果在第一张幻灯片上以阴影显示，但是与“问题b”和“问题c”相对应的数字没有阴影。

Answer 1

对于偶然发现此问题的任何人，到目前为止，我发现最好的方法是使用tikz并设置自定义透明模式:

\gdef\transparent@value{100}
\newcommand{\getbeamertrans}{
    \transparent@value/100
}
\newcommand{\set@transparent}[1]{\gdef\transparent@value{#1}}
\def\opaquenessCustom#1{%
\only<1->{%
  \beamer@actions{%
    \set@transparent{#1}%
    \expandafter\xdef\csname beamer@oldcolorhook%
    \the\beamer@coveringdepth\endcsname{\beamer@colorhook}%
    \expandafter\xdef\csname beamer@oldpgfextension%
    \the\beamer@coveringdepth\endcsname{\beamer@pgfextension}%
    {\globalcolorstrue\colorlet{beamer@freeze\the\beamer@coveringdepth}{bg}}%
    \xdef\beamer@colorhook{!#1!beamer@freeze%
      \the\beamer@coveringdepth\beamer@colorhook}%
    \gdef\beamer@pgfextension{!#1opaque}%
    \color{.}%
  }%
  {%
    \set@transparent{100}%
    \xdef\beamer@colorhook{\csname beamer@oldcolorhook%
      \the\beamer@coveringdepth\endcsname}%
    \xdef\beamer@pgfextension{\csname beamer@oldpgfextension%
      \the\beamer@coveringdepth\endcsname}%
    \color{.}%
  }}%
}%
\define@key{beamer@mixin}{transparent}[15]{%
    \def\beamer@uncoverbeforeactions{\ignorespaces\opaquenessCustom{#1}}%
    \def\beamer@uncoverafteractions{\ignorespaces\opaquenessCustom{#1}}%
}
\newcommand{\BeamerGraphic}[1]{%
    \begin{tikzpicture}%
        {\node[opacity=\getbeamertrans] {\includegraphics{#1}};}%
    \end{tikzpicture}%
}