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% https://creativecommons.org/publicdomain/zero/1.0/

\ProvidesFile{color.cfg}%
  [2016/01/02 v1.6 sample color configuration]

% Select an appropriate default driver
\begingroup
  \chardef\x=0\relax
  % check luatex
  \ifx\luatexversion\@undefined
  % check pdfTeX
  \@ifundefined{pdfoutput}{}{%
    \ifnum\pdfoutput<1 %
    \else
      \chardef\x=1\relax
    \fi
  }%
  % check VTeX
  \@ifundefined{OpMode}{}{%
    \chardef\x=2\relax
  }%
  % check XeTeX
  \@ifundefined{XeTeXversion}{}{%
    \chardef\x=3\relax
  }%
  \else
    \ifnum\luatexversion>85
      \ifnum\outputmode>0
      \chardef\x=4\relax
      \fi
    \else
      \ifnum\pdfoutput>0
      \chardef\x=1\relax
      \fi
    \fi
  \fi
\expandafter\endgroup
\ifcase\x
  % default case
  \def\Gin@driver{dvips.def}%
  \ExecuteOptions{dvips}%
\or
  % pdfTeX is running in pdf mode
  \def\Gin@driver{pdftex.def}%
  \ExecuteOptions{pdftex}%
\or
  % VTeX is running
  \def\Gin@driver{vtex.def}%
  \ExecuteOptions{vtex}%
\or
  % XeTeX is running
  \def\Gin@driver{xetex.def}%
  \ExecuteOptions{xetex}%
\or
  % luatex (> 0.85)
  \def\Gin@driver{luatex.def}%
  \ExecuteOptions{luatex}%
\else
  \PackageError{color}{Unexpected configuration}{}
\fi
\endinput