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diff --git a/graphics/pgf/base/tex/generic/systemlayer/pgfsys-common-pdf-via-dvi.def b/graphics/pgf/base/tex/generic/systemlayer/pgfsys-common-pdf-via-dvi.def
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+% Copyright 2019 by Till Tantau
+% CMYK and grayscale shadings adaptation copyright 2019 by David Purton
+%
+% This file may be distributed and/or modified
+%
+% 1. under the LaTeX Project Public License and/or
+% 2. under the GNU Public License.
+%
+% See the file doc/generic/pgf/licenses/LICENSE for more details.
+
+\ProvidesFileRCS{pgfsys-common-pdf-via-dvi.def}
+
+% Common driver commands for all drivers that produce pdf via the
+% detour of a dvi file
+
+% For unique object name:
+\newcount\pgfsys@objnum\pgfsys@objnum\@ne
+
+% Hboxes
+
+\def\pgfsys@beginpurepicture{\special{pdf: content q}}
+
+
+\def\pgfsys@imagesuffixlist{.pdf:.jpg:.jpeg:.png:}
+\def\pgfsys@horishading#1#2#3{%
+ {%
+ \pgf@parsefunc{#3}%
+ \pgf@process{\pgfpoint{\pgf@max}{#2}}%
+ \edef\@temp{\noexpand\pgfutil@insertatbegincurrentpage{\special{pdf: beginxobj @pgfshade\the\pgfsys@objnum\space width \the\pgf@max\space height \the\pgf@y}}}\@temp%
+ \edef\@temp{\noexpand\pgfutil@insertatbegincurrentpage{\special{pdf: put @resources <<
+ /Shading << /Sh << /ShadingType 2
+ /ColorSpace \pgf@shading@device\space
+ /Domain [\pgf@pdfparseddomain]
+ /Coords [\pgf@doma\space0 \pgf@domb\space0]
+ /Function \pgf@pdfparsedfunction
+ /Extend [false false] >> >> >>}}}\@temp% <<
+ \pgfutil@insertatbegincurrentpage{\special{pdf: content /Sh sh}%
+ \special{pdf: endxobj}}%
+ \xdef\pgfutil@tempa{%
+ \hbox to\the\pgf@max{\vbox to#2{\vfil\special{pdf: usexobj @pgfshade\the\pgfsys@objnum}}\hfil}}%
+ }%
+ \global\expandafter\let\csname @pgfshading#1!\endcsname=\pgfutil@tempa
+ \global\advance\pgfsys@objnum\@ne
+}
+\def\pgfsys@vertshading#1#2#3{%
+ {%
+ \pgf@parsefunc{#3}%
+ \pgf@process{\pgfpoint{\pgf@max}{#2}}%
+ \edef\@temp{\noexpand\pgfutil@insertatbegincurrentpage{\special{pdf: beginxobj @pgfshade\the\pgfsys@objnum\space width \the\pgf@y\space height \the\pgf@max\space}}}\@temp%
+ \edef\@temp{\noexpand\pgfutil@insertatbegincurrentpage{\special{pdf: put @resources <<
+ /Shading << /Sh << /ShadingType 2
+ /ColorSpace \pgf@shading@device\space
+ /Domain [\pgf@pdfparseddomain]
+ /Coords [0 \pgf@doma\space0 \pgf@domb]
+ /Function \pgf@pdfparsedfunction
+ /Extend [false false] >> >> >>}}}\@temp% <<
+ \pgfutil@insertatbegincurrentpage{\special{pdf: content /Sh sh}%
+ \special{pdf: endxobj}}%
+ \xdef\pgfutil@tempa{%
+ \hbox to#2{\vbox to\the\pgf@max{\vfil\special{pdf: usexobj @pgfshade\the\pgfsys@objnum}}\hfil}}%
+ }%
+ \global\expandafter\let\csname @pgfshading#1!\endcsname=\pgfutil@tempa
+ \global\advance\pgfsys@objnum\@ne
+}
+\def\pgfsys@radialshading#1#2#3{%
+ {%
+ \pgf@parsefunc{#3}%
+ \pgf@process{#2}%
+ \pgf@xa=\pgf@x%
+ \pgf@ya=\pgf@y%
+ \pgf@process{\pgfpoint{\pgf@max}{\pgf@max}}%
+ \advance\pgf@xa by \pgf@x\relax%
+ \advance\pgf@ya by \pgf@y\relax%
+ \pgf@sys@bp@correct{\pgf@x}%
+ \pgf@sys@bp@correct{\pgf@y}%
+ \pgf@sys@bp@correct{\pgf@xa}%
+ \pgf@sys@bp@correct{\pgf@ya}%
+ \pgfutil@tempdima=2\pgf@max\relax%
+ \edef\@temp{\noexpand\pgfutil@insertatbegincurrentpage{\special{pdf: beginxobj @pgfshade\the\pgfsys@objnum\space width \the\pgfutil@tempdima\space height \the\pgfutil@tempdima}}}\@temp%
+ \edef\@temp{\noexpand\pgfutil@insertatbegincurrentpage{\special{pdf: put @resources <<
+ /Shading << /Sh << /ShadingType 3
+ /ColorSpace \pgf@shading@device\space
+ /Domain [\pgf@pdfparseddomain]
+ /Coords [\pgf@sys@tonumber{\pgf@xa} \pgf@sys@tonumber{\pgf@ya} \pgf@doma\space \pgf@sys@tonumber{\pgf@x} \pgf@sys@tonumber{\pgf@y} \pgf@domb]
+ /Function \pgf@pdfparsedfunction
+ /Extend [true false] >> >> >>}}}\@temp% <<
+ \pgfutil@insertatbegincurrentpage{\special{pdf: content /Sh sh}%
+ \special{pdf: endxobj}}%
+ \xdef\pgfutil@tempa{%
+ \hbox to\the\pgfutil@tempdima{\vbox to\the\pgfutil@tempdima{\vfil\special{pdf: usexobj @pgfshade\the\pgfsys@objnum}}\hfil}}%
+ }%
+ \global\expandafter\let\csname @pgfshading#1!\endcsname=\pgfutil@tempa
+ \global\advance\pgfsys@objnum\@ne
+}%
+
+\def\pgf@sys@pdf@dvi@tracker{
+ \def\pgfsys@markposition##1{%
+ \pdfsavepos%
+ \edef\pgf@temp{##1}%
+ \expandafter\write\expandafter\pgfutil@auxout\expandafter{%
+ \expandafter\noexpand\expandafter\pgfsyspdfmark\expandafter{\pgf@temp}{\the\pdflastxpos}{\the\pdflastypos}}%
+ }
+ \def\pgfsyspdfmark##1##2##3{%
+ \expandafter\gdef\csname pgf@sys@pdf@mark@pos@##1\endcsname{\pgfqpoint{##2sp}{##3sp}}%
+ }
+ \def\pgfsys@getposition##1##2{%
+ \edef\pgf@marshal{\let\noexpand##2=\expandafter\noexpand\csname pgf@sys@pdf@mark@pos@##1\endcsname}%
+ \pgf@marshal%
+ }
+ \def\pgf@sys@pdf@mark@pos@pgfpageorigin{\pgfpointorigin}
+}
+
+
+
+%
+% Resource management
+%
+
+\newif\ifpgf@sys@pdf@colorspaces@exists
+\newif\ifpgf@sys@pdf@patterns@exists
+\newif\ifpgf@sys@pdf@extgs@exists
+\newif\ifpgf@sys@pdf@colorspaces@created
+\newif\ifpgf@sys@pdf@patterns@created
+\newif\ifpgf@sys@pdf@extgs@created
+\newif\ifpgf@sys@pdf@any@resources
+
+\def\pgf@sys@setuppdfresources@plain{%
+ % This command will setup pdf resource in plain and in latex
+ % mode. ConTeXt has its own handler
+ \pgfutil@insertatbegineverypage{%
+ \pgf@sys@pdf@any@resourcesfalse%
+ \ifpgf@sys@pdf@extgs@exists%
+ \pgf@sys@pdf@any@resourcestrue%
+ \ifpgf@sys@pdf@extgs@created \else \special{pdf: obj @pgfextgs <<>>} \global\pgf@sys@pdf@extgs@createdtrue \fi% <<
+ \fi%
+ \ifpgf@sys@pdf@colorspaces@exists%
+ \pgf@sys@pdf@any@resourcestrue%
+ \ifpgf@sys@pdf@colorspaces@created \else \special{pdf: obj @pgfcolorspaces <<>>} \global\pgf@sys@pdf@colorspaces@createdtrue \fi% <<
+ \fi%
+ \ifpgf@sys@pdf@patterns@exists%
+ \pgf@sys@pdf@any@resourcestrue%
+ \ifpgf@sys@pdf@patterns@created \else \special{pdf: obj @pgfpatterns <<>>} \global\pgf@sys@pdf@patterns@createdtrue \fi% <<
+ \fi%
+ \ifpgf@sys@pdf@any@resources%
+ \special{pdf: put @resources <<
+ \ifpgf@sys@pdf@extgs@exists /ExtGState @pgfextgs \fi
+ \ifpgf@sys@pdf@patterns@exists /Pattern @pgfpattern \fi
+ \ifpgf@sys@pdf@colorspaces@exists /ColorSpace @pgfcolorspaces \fi
+ >>}% <<
+ \fi%
+ }
+ \def\pgf@sys@addpdfresource@extgs@plain##1{%
+ \global\pgf@sys@pdf@extgs@existstrue%
+ \pgfutil@insertatbegincurrentpage{\special{pdf: put @pgfextgs << ##1 >>}}% <<
+ }
+ \def\pgf@sys@addpdfresource@colorspaces@plain##1{%
+ \global\pgf@sys@pdf@colorspaces@existstrue%
+ \pgfutil@insertatbegincurrentpage{\special{pdf: put @pgfcolorspaces << ##1 >>}}% <<
+ }
+ \def\pgf@sys@addpdfresource@patterns@plain##1{%
+ \global\pgf@sys@pdf@patterns@existstrue%
+ \pgfutil@insertatbegincurrentpage{\special{pdf: put @pgfpatterns << ##1 >>}}% <<
+ }
+}
+\pgfutil@setuppdfresources % possibly call the above
+
+
+\endinput
+
+%%% Local Variables:
+%%% mode: latex
+%%% End: