[NTG-context] invert colors in \externalfigure

Pablo Rodriguez oinos at gmx.es
Wed Jan 20 13:10:23 CET 2016


Dear list,

I have the following sample:

    \setuppapersize[A6]
    \setuplayout[width=middle]
    \starttext
    \startmakeup[standard][align=center]
    \dontleavehmode\externalfigure[cow][width=\textwidth]
    \stopmakeup
    \stoptext

How can I invert the colors in the external figure without having to
edit the image file?

Many thanks for your help,

Pablo
-- 
http://www.ousia.tk


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