[NTG-context] Re: Transparency in external PDFs does not work

[Hans Hagen <j.hagen@xs4all.nl>]

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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)

the attached works ok

Hans

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\starttext
    \startTEXpage[offset=1pt]
        \colored[a=1,t=.5,r=1]{\framed{test 1}}
    \stopTEXpage
    \startTEXpage[offset=1pt]
        \colored[a=1,t=.5,b=1]{\framed{test 2}}
    \stopTEXpage
\stoptext

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\nopdfcompression

\starttext
%     \externalfigure[fig.pdf][page=1]
    \externalfigure[gif.pdf][page=1]
    \externalfigure[gif.pdf][page=2]
    \startoverlay
        {\externalfigure[gif.pdf][page=1]}
        {\externalfigure[gif.pdf][page=2]}
    \stopoverlay
\stoptext

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