Am Montag, 17. Juni 2024, 23:50:16 MESZ schrieb Hans Hagen: > On 6/17/2024 5:07 PM, Gerion Entrup wrote: > > Hi, > > > > I'm using LaTeX-Beamer and TikZ for figure typesetting. > > With this combination, it is easy to combine Beamer's animation system with > > TikZ transparency feature. > > This way, the resulting PDFs contain the full graphic on every page, but > > parts of it are invisible for a specific page. > > One of these files is attached as an example. > > > > The problem is to embed these PDFs into a ConTeXt document. > > For example, this MWE seems to not respect transparency (see mwe.pdf): > > ``` > > \starttext > > \externalfigure[fig.pdf][page=1] > > \stoptext > > ``` > > > > I use Okular/Poppler as PDF viewer. > > Can I fix this somehow or is it a bug somewhere deeper? > next time check the file that you include ... it has no transparency (it > has zero values)
I don't really have a clue about the PDF standard. It is made with the TikZ opacity flag therefore I thought it controls the transparency. See the attached tex file to reproduce fig.pdf (compilation with `latexmk -pdflua fig.tex`). I also found a workaround. It is possible to import fig.pdf with Inkscape and export just the correct page as PDF again and embed that in ConTeXt: ``` inkscape --export-page=1 fig.pdf --export-type=pdf --export-filename=1.pdf ``` Gerion
\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{fit}
\usepackage[active, tightpage]{preview}
\PreviewEnvironment{tikzpicture}
% taken from https://github.com/luhsra/texmf/blob/main/tex/latex/beamertools/beamertools.sty
\tikzset{
onslide/.code args={<#1>#2}{%
\only<#1>{\pgfkeysalso{#2}}
},
alt/.code args={<#1>#2#3}{%
\alt<#1>{\pgfkeysalso{#2}}{\pgfkeysalso{#3}}
},
global opacity/.style={
opacity=#1,
text opacity=#1,
every shadow/.append style={opacity=#1},
every on layer/.append style={opacity=#1},
every node/.append style={opacity=#1},
prefix after command={\pgfextra{\tikzset{every pin/.style={opacity=#1},
every pin edge/.style={opacity=#1},
every label/.style={opacity=#1}}}},
},
invisible/.style={global opacity=0},
visible/.style={global opacity=1},
visible on/.style={alt=#1{}{invisible}},
invisible on/.style={alt=#1{invisible}{}},
}
\begin{document}
\begin{frame}
\begin{tikzpicture}
\node[draw, visible on=<1>] (fp) {First Page};
\node[draw, visible on=<2>] (sp) {Second Page};
\node[draw, fit=(fp)(sp)] {};
\end{tikzpicture}
\end{frame}
\end{document}
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