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+% Copyright 2019 by Till Tantau
+%
+% 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.
+%
+% Adapted for colors and pdf resources by Hans Hagen. There can be a few more
+% optimizations but they are not critital.
+
+\pgfutil@format@is@contexttrue
+
+
+% The aux files, needed for reading back coordinates
+\def\pgfutil@aux@read@hook{%
+ \pgfutil@IfFileExists{\jobname.pgf}{\input \jobname.pgf\relax}{}
+ \csname newwrite\endcsname\pgfutil@auxout
+ \immediate\csname openout\endcsname\pgfutil@auxout\jobname.pgf\relax
+}
+\def\pgfutil@writetoaux#1{\write\pgfutil@auxout{#1}}
+
+% XColor-like support for ConTeXt
+
+\def\pgfutil@definecolor#1#2#3{\csname pgfutil@emu@#2\endcsname{#1}#3\@nil}
+
+\def\pgfutil@emu@rgb#1#2,#3,#4\@nil{\expandafter\def\csname\string\color@#1\endcsname{\xcolor@{}{}{rgb}{#2,#3,#4}}}
+\def\pgfutil@emu@gray#1#2\@nil{\expandafter\def\csname\string\color@#1\endcsname{\xcolor@{}{}{rgb}{#2,#2,#2}}}
+\def\pgfutil@emu@cmyk#1#2,#3,#4,#5\@nil{\expandafter\def\csname\string\color@#1\endcsname{\xcolor@{}{}{cmyk}{#2,#3,#4,#5}}}
+
+
+% no need for x colors (users can load it if needed)
+%\pgfutil@definecolor{white}{gray}{1}
+%\pgfutil@definecolor{black}{gray}{0}
+%\pgfutil@definecolor{gray}{gray}{0.5}
+%\pgfutil@definecolor{red}{rgb}{1,0,0}
+%\pgfutil@definecolor{green}{rgb}{0,1,0}
+%\pgfutil@definecolor{blue}{rgb}{0,0,1}
+%\pgfutil@definecolor{cyan}{rgb}{0,1,1}
+%\pgfutil@definecolor{magenta}{rgb}{1,0,1}
+%\pgfutil@definecolor{yellow}{rgb}{1,1,0}
+%\pgfutil@definecolor{orange}{rgb}{1,0.5,0}
+%\pgfutil@definecolor{violet}{rgb}{0.5,0,0.5}
+%\pgfutil@definecolor{purple}{rgb}{0.75,0,0.25}
+%\pgfutil@definecolor{brown}{rgb}{0.75,0.5,0.25}
+
+\def\pgfutil@color#1{%
+ \pgfutil@colorlet{.}{#1}%
+ \pgfsysprotocol@getcurrentprotocol\pgfutil@emu@temp%
+ {%
+ \pgfsysprotocol@setcurrentprotocol\pgfutil@empty%
+ \pgfsysprotocol@bufferedtrue%
+ \pgfsetcolor{.}%
+ \expandafter\pgfsys@outerinvoke\expandafter{\pgfsysprotocol@currentprotocol}%
+ }%
+ \pgfsysprotocol@setcurrentprotocol\pgfutil@emu@temp%
+ \aftergroup\pgfutil@reset@color%
+}
+
+\def\pgfutil@extractcolorspec#1#2{%
+ \def#2{{#1}}%
+}
+
+\def\pgfutil@convertcolorspec#1#2#3{%
+ \edef#3{\expandafter\expandafter\expandafter\pgfutil@emu@select\csname\string\color@#1\endcsname}%
+}
+
+\def\pgfutil@doifcolorelse#1#2#3{%
+ \expandafter\ifx\csname\string\color@#1\endcsname\relax%
+ \doifcolorelse{#1}{\let\pgf@next=\pgfutil@firstoftwo}{\let\pgf@next=\pgfutil@secondoftwo}%
+ \else
+ \let\pgf@next=\pgfutil@firstoftwo%
+ \fi%
+ \pgf@next{#2}{#3}%
+}
+
+\def\pgfutil@reset@color{%
+ \pgfsysprotocol@getcurrentprotocol\pgfutil@emu@temp%
+ {%
+ \pgfsysprotocol@setcurrentprotocol\pgfutil@empty%
+ \pgfsysprotocol@bufferedtrue%
+ \pgfsetcolor{.}%
+ \expandafter\pgfsys@outerinvoke\expandafter{\pgfsysprotocol@currentprotocol}%
+ }%
+ \pgfsysprotocol@setcurrentprotocol\pgfutil@emu@temp%
+}
+
+\expandafter\def\csname\string\color@.\endcsname{\xcolor@{}{}{rgb}{0,0,0}}
+
+\def\pgfutil@colorlet#1#2{%
+ \edef\pgf@marshal{#2}%
+ \expandafter\pgfutil@in@\expandafter!\expandafter{\pgf@marshal}%
+ \ifpgfutil@in@%
+ % compute mixture
+ {%
+ \expandafter\pgfutil@emu@mix\pgf@marshal!white!\@nil%
+ \xdef\pgf@marshal{\noexpand\def\expandafter\noexpand\csname\string\color@#1\endcsname{%
+ \noexpand\xcolor@{}{}{rgb}{\pgf@sys@tonumber\pgf@xa,\pgf@sys@tonumber\pgf@xb,\pgf@sys@tonumber\pgf@xc}}}%
+ }%
+ \pgf@marshal%
+ \else%
+ \expandafter\ifx\csname\string\color@#2\endcsname\relax%
+ \pgfutil@registercolor{#2}%
+ \fi%
+ \edef\pgf@marshal{\noexpand\let\expandafter\noexpand\csname\string\color@#1\endcsname=%
+ \expandafter\noexpand\csname\string\color@#2\endcsname}%
+ \pgf@marshal%
+ \fi%
+}
+
+\def\pgfutil@emu@mix#1!#2!#3!#4\@nil{%
+ \expandafter\ifx\csname\string\color@#1\endcsname\relax%
+ \pgfutil@registerrgb{#1}%
+ \fi%
+ \expandafter\ifx\csname\string\color@#3\endcsname\relax%
+ \pgfutil@registerrgb{#3}%
+ \fi%
+ \expandafter\expandafter\expandafter\pgfutil@emu@unpack\csname\string\color@#1\endcsname%
+ \pgf@ya=\pgf@xa%
+ \pgf@yb=\pgf@xb%
+ \pgf@yc=\pgf@xc%
+ \expandafter\expandafter\expandafter\pgfutil@emu@unpack\csname\string\color@#3\endcsname%
+ \c@pgf@counta=#2\relax%
+ \c@pgf@countb=100\relax%
+ \advance\c@pgf@countb by-\c@pgf@counta\relax%
+ \pgf@xa=\c@pgf@countb\pgf@xa%
+ \advance\pgf@xa by\c@pgf@counta\pgf@ya%
+ \divide\pgf@xa by 100\relax%
+ \pgf@xb=\c@pgf@countb\pgf@xb%
+ \advance\pgf@xb by\c@pgf@counta\pgf@yb%
+ \divide\pgf@xb by 100\relax%
+ \pgf@xc=\c@pgf@countb\pgf@xc%
+ \advance\pgf@xc by\c@pgf@counta\pgf@yc%
+ \divide\pgf@xc by 100\relax%
+}
+
+\def\pgfutil@emu@unpack#1#2#3#4#5{%
+ \pgfutil@emu@@unpack#5\@nil%
+}
+
+\def\pgfutil@emu@@unpack#1,#2,#3\@nil{%
+ \pgf@xa=#1pt%
+ \pgf@xb=#2pt%
+ \pgf@xc=#3pt%
+}
+
+\def\pgfutil@emu@select#1#2#3#4#5{#5}
+
+\def\XC@tgt@mod#1{#1}
+\def\XC@sdef#1#2{\edef#1{#2}}
+\def\XC@mod@cmyk{cmyk}
+\def\XC@mod@rgb{rgb}
+
+% goody
+
+\let\colorlet=\pgfutil@colorlet
+
+% latex stuff
+
+\newskip\pgfutil@flushglue
+\pgfutil@flushglue=0pt plus 1fil
+
+
+% pgfutil@minipage
+
+\def\pgfutil@minipage[#1]#2{%
+ \hbox to#2\bgroup
+ \hsize=#2\relax
+ \vbox\bgroup
+ \noindentation
+}
+
+\def\pgfutil@endminipage{%
+ \egroup
+ \egroup
+}
+
+% global colors
+
+\let\pgfutil@globalcolorsfalse\relax
+\let\pgfutil@globalcolorstrue \relax
+
+% font stuff
+
+\def\pgfutil@font@tiny {\tfxx}
+\def\pgfutil@font@scriptsize {\tfxx}
+\def\pgfutil@font@footnotesize{\tfx}
+\def\pgfutil@font@small {\tfx}
+\def\pgfutil@font@normalsize {\tf}
+\def\pgfutil@font@large {\tfa}
+\def\pgfutil@font@Large {\tfb}
+\def\pgfutil@font@huge {\tfc}
+\def\pgfutil@font@Huge {\tfc}
+\def\pgfutil@font@itshape {\it}
+\def\pgfutil@font@bfseries {\bf}
+\def\pgfutil@font@normalfont {\tf}
+\def\pgfutil@selectfont {\tf}
+
+% registers
+
+\newcount\pgfutil@tempcnta
+\newcount\pgfutil@tempcntb
+
+\newbox \pgfutil@tempboxa
+
+\newbox \pgfutil@voidb@x
+\newtoks \pgfutil@toks@
+
+\let\pgfmath@tempdima\pgfutil@tempdima
+\let\pgfmath@tempdima\pgfutil@tempdima
+\let\pgfmath@tempcnta\pgfutil@tempcnta
+\let\pgfmath@tempcntb\pgfutil@tempcntb
+
+% module stuff
+
+\def\pgfutil@usemodule#1{\usemodule[#1]}
+
+% more adaptions
+
+\let\pgfutil@insertatbegincurrentpagefrombox\flushatshipout
+\let\pgfutil@insertatbegincurrentpage \flushatshipout
+\def\pgfutil@insertatbegineverypage #1{\appendtoks#1\to\everyshipout} % space removed after #1
+
+\let\pgfutil@setuppdfresources \relax
+
+\doifmodeelse {mkiv} {
+
+ \def\pgfutil@guessdriver{\def\pgfsysdriver{pgfsys-luatex.def}}
+
+ \def\pgfutil@driver@if@in#1#2{%
+ \edef\pgf@marshal{\noexpand\pgfutil@in@{#1}{\preloadedspecials}}%
+ \pgf@marshal
+ \ifpgfutil@in@
+ \def\pgfsysdriver{#2}%
+ \fi
+ }
+
+ \def\pgf@sys@pdf@pdfbackendset@one#1#2%
+ {\normalexpanded{\noexpand\pgf@sys@pdf@pdfbackendset@two\noexpand#1#2\relax}}
+
+ \def\pgf@sys@pdf@pdfbackendset@two#1/#2 #3\relax
+ {#1{#2}{#3}}
+
+ \def\pgf@sys@pdf@addtopageresource@pattern {\pgf@sys@pdf@pdfbackendset@one\pdfbackendsetpattern}
+ \def\pgf@sys@pdf@addtopageresource@colorspace{\pgf@sys@pdf@pdfbackendset@one\pdfbackendsetcolorspace}
+ \def\pgf@sys@pdf@addtopageresource@extgstate {\pgf@sys@pdf@pdfbackendset@one\pdfbackendsetextgstate}
+ \def\pgf@sys@pdf@possible@resources {\pdfbackendcurrentresources}
+ \def\pgf@sys@pdf@check@resources {}
+
+ \let\pgfutil@registercolor\pgf@context@registercolor
+ \let\pgfutil@registerrgb \pgf@context@registerrgb
+ \let\pgfutil@registercmyk \pgf@context@registercmyk
+ \let\pgfutil@registergray \pgf@context@registergray
+
+} {
+ \def\pgf@sys@pdf@addtopageresource@extgstate {\appendtoPDFdocumentextgstates }
+ \def\pgf@sys@pdf@addtopageresource@colorspace {\appendtoPDFdocumentcolorspaces}
+ \def\pgf@sys@pdf@addtopageresource@pattern {\appendtoPDFdocumentpatterns }
+ \def\pgf@sys@pdf@possible@resources {\currentPDFresources}
+ \def\pgf@sys@pdf@check@resources {}
+
+
+ \ifx\pdfoutput\undefined\newcount\pdfoutput\fi
+ \ifx\pdfoutput\relax \newcount\pdfoutput\fi
+
+ \def\pgfutil@guessdriver{
+ \ifx\XeTeXversion\@undefined
+ \ifx\preloadedspecials\@undefined%
+ \ifcase\pdfoutput%
+ \def\pgfsysdriver{pgfsys-dvips.def}%
+ \else%
+ \def\pgfsysdriver{pgfsys-pdftex.def}% pdfTeX & LuaTeX
+ \fi%
+ \else%
+ \pgfutil@driver@if@in{postscript}{pgfsys-dvips.def}
+ \pgfutil@driver@if@in{tpd}{pgfsys-pdftex.def}
+ \pgfutil@driver@if@in{dpm}{pgfsys-dvipdfm.def}
+ \pgfutil@driver@if@in{dpx}{pgfsys-dvipdfmx.def}
+ \pgfutil@driver@if@in{xetex}{pgfsys-xetex.def}
+ \ifx\pgfsysdriver\relax%
+ \PackageWarning{pgf}{I was not able to discern the driver, the
+ preloaded specials were \preloadedspecials. I am going to use
+ pgfsys-dvips.def}%
+ \def\pgfsysdriver{pgfsys-dvips.def}
+ \fi%
+ \fi
+ \else
+ \def\pgfsysdriver{pgfsys-xetex.def}% should be right
+ \fi
+ }
+
+ \def\pgfutil@driver@if@in#1#2{%
+ \edef\pgf@marshal{\noexpand\pgfutil@in@{#1}{\preloadedspecials}}%
+ \pgf@marshal
+ \ifpgfutil@in@
+ \def\pgfsysdriver{#2}%
+ \fi
+ }
+
+ % The cmyk part is from Joseph Wright.
+ % See tex.stackexchange.com/questions/27952/cmyk-context-colors-in-tikz
+ \def\pgfutil@registercolor#1{%
+ \edef\pgf@temp{\PDFcolor{#1}}%
+ \edef\pgf@marshal{\noexpand\pgfutil@in@{rg}{\pgf@temp}}%
+ \pgf@marshal
+ \ifpgfutil@in@
+ \expandafter\pgfutil@context@parse@rgb\pgf@temp\pgf@stop{#1}%
+ \else
+ \edef\pgf@marshal{\noexpand\pgfutil@in@{g}{\pgf@temp}}%
+ \pgf@marshal
+ \ifpgfutil@in@
+ \expandafter\pgfutil@context@parse@gray\pgf@temp\pgf@stop{#1}%
+ \else
+ \edef\pgf@marshal{\noexpand\pgfutil@in@{k}{\pgf@temp}}%
+ \pgf@marshal
+ \ifpgfutil@in@
+ \expandafter\pgfutil@context@parse@cmyk\pgf@temp\pgf@stop{#1}%
+ \else
+ \pgferror{Color #1 has an unsupported color model.}%
+ \pgfutil@definecolor{#1}{gray}{0}%
+ \fi
+ \fi
+ \fi
+ }
+
+ \def\pgfutil@context@parse@gray#1 g#2\pgf@stop#3{%
+ \pgfutil@definecolor{#3}{gray}{#1}
+ }
+
+ \def\pgfutil@context@parse@rgb#1 #2 #3 rg#4\pgf@stop#5{%
+ \pgfutil@definecolor{#5}{rgb}{#1,#2,#3}
+ }
+
+ \def\pgfutil@context@parse@cmyk#1 #2 #3 #4k#5\pgf@stop #6{%
+ \pgfutil@definecolor{#6}{cmyk}{#1,#2,#3,#4}%
+ }
+
+ \def\pgfutil@emu@cmyk#1#2,#3,#4,#5\@nil{%
+ \expandafter\def\csname\string\color@#1\endcsname
+ {\xcolor@{}{}{cmyk}{#2,#3,#4,#5}}%
+ }
+
+ \let\pgfutil@registerrgb \pgfutil@registercolor
+ \let\pgfutil@registercmyk \pgfutil@registercolor
+ \let\pgfutil@registergray \pgfutil@registercolor
+
+
+}
+
+\let\pgf@sys@addpdfresource@extgs@plain \pgf@sys@pdf@addtopageresource@extgstate
+\let\pgf@sys@addpdfresource@patterns@plain \pgf@sys@pdf@addtopageresource@pattern
+\let\pgf@sys@addpdfresource@colorspaces@plain\pgf@sys@pdf@addtopageresource@colorspace
+\let\pgf@sys@pdf@check@resources@plain \pgf@sys@pdf@check@resources
+
+\pgf@sys@addpdfresource@colorspaces@plain{/pgfprgb [/Pattern /DeviceRGB]}
+
+% do something at the end of a job
+
+\appendtoks \the\pgfutil@everybye \to \everybye
+
+\long\def\AtBeginDocument#1{\appendtoks#1\to\everystarttext}%
+
+% pgfcalendar uses translations
+
+\def\pgfutil@translate#1{#1} % \translate works very different in ConTeXt
+
+% e-TeX primitives
+
+\let\pgfutil@protected\normalprotected
+\let\pgfutil@unexpanded\normalunexpanded
+
+\endinput