% 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-pdftex.def}


% Driver commands for pdf

%
% Load common pdf commands:
%
\input pgfsys-common-pdf.def

%
% pdftex-specific stuff:
%
\def\pgfsys@invoke#1{\pdfliteral{#1}}

% Synced hboxes
\def\pgfsys@hboxsynced#1{%
  {%
    \pgfsys@begin@idscope%
    \pgfsys@beginscope%
    \setbox\pgf@hbox=\hbox{%
      \hskip\pgf@pt@x%
      \raise\pgf@pt@y\hbox{%
        \pgf@pt@x=0pt%
        \pgf@pt@y=0pt%
        \pgflowlevelsynccm%
        \pgfsys@hbox#1}%
      \hss%
    }%
    \wd\pgf@hbox=0pt%
    \ht\pgf@hbox=0pt%
    \dp\pgf@hbox=0pt%
    \box\pgf@hbox%
    \pgfsys@endscope%
    \pgfsys@end@idscope%
  }%
}



\def\pgfsys@imagesuffixlist{.pdf:.jpg:.jpeg:.png:}
\def\pgfsys@defineimage{% width, height, page number
  \ifx\pgf@imagewidth\pgfutil@empty\else\edef\pgf@imagewidth{ width \pgf@imagewidth }\fi%
  \ifx\pgf@imageheight\pgfutil@empty\else\edef\pgf@imageheight{ height \pgf@imageheight }\fi%
  \ifx\pgf@imagepage\pgfutil@empty\else\edef\pgf@imagepage{ page \pgf@imagepage }\fi%
  \ifx\pdfximage\@undefined% old version of pdflatex
    \ifx\pgf@imagepage\pgfutil@empty\else%
      \pgfwarning{Page selection not supported. Ignoring page selection}%
    \fi%
    \setbox\pgfutil@tempboxa=\hbox{%
      \pdfimage \pgf@imageheight \pgf@imagewidth {\pgf@filename}}%
    \pdfform\pgfutil@tempboxa%
    \edef\pgf@image{\noexpand\pdfrefform\the\pdflastform}%
  \else% new version
    {\pdfximage \pgf@imageheight \pgf@imagewidth attr
      {/Interpolate \pgf@imageinterpolate\space\pgf@imagemask} \pgf@imagepage
      {\pgf@filename}}%
    \edef\pgf@image{\noexpand\pdfrefximage\the\pdflastximage}%
  \fi
}%
\def\pgfsys@definemask{%
  \ifx\pgf@maskmatte\pgfutil@empty%
  \else%
    \edef\pgf@maskmatte{/Matte [\pgf@maskmatte]}%
  \fi%
  \edef\pgf@attr{{\pgf@maskmatte\space /Decode [1 0]}}%
  \immediate\pdfximage attr \pgf@attr {\pgf@filename}%
  \edef\pgf@mask{/SMask \the\pdflastximage\space 0 R}%
}
\def\pgfsys@horishading#1#2#3{%
  {%
    \pgf@parsefunc{#3}%
    \pgfmathparse{#2}%
    \setbox\pgfutil@tempboxa=\hbox to\pgf@max{\vbox to\pgfmathresult pt{\vfil\pgfsys@invoke{/Sh sh}}\hfil}%
    \pgf@process{\pgfpoint{\pgf@max}{#2}}%
    \immediate\pdfxform 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] >> >>}\pgfutil@tempboxa% <<
    \xdef\pgfutil@tempa{\hbox{\noexpand\pdfrefxform\the\pdflastxform}}%
  }%
  \global\expandafter\let\csname @pgfshading#1!\endcsname=\pgfutil@tempa
}
\def\pgfsys@vertshading#1#2#3{%
  {%
    \pgf@parsefunc{#3}%
    \pgfmathparse{#2}%
    \setbox\pgfutil@tempboxa=\hbox to\pgfmathresult pt{\vbox to\pgf@max{\vfil\pgfsys@invoke{/Sh sh}}\hfil}%
    \pgf@process{\pgfpoint{#2}{\pgf@max}}%
    \immediate\pdfxform 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] >> >>}\pgfutil@tempboxa% <<
    \xdef\pgfutil@tempa{\hbox{\noexpand\pdfrefxform\the\pdflastxform}}%
  }%
  \global\expandafter\let\csname @pgfshading#1!\endcsname=\pgfutil@tempa
}
\def\pgfsys@radialshading#1#2#3{%
  {%
    \pgf@parsefunc{#3}%
    \setbox\pgfutil@tempboxa=\hbox to2\pgf@max{\vbox to2\pgf@max{\vfil\pgfsys@invoke{/Sh sh}}\hfil}%
    \pgf@process{#2}%
    \pgf@xa=\pgf@x%
    \pgf@ya=\pgf@y%
    \pgf@process{\pgfpoint{\pgf@max}{\pgf@max}}%
    \advance\pgf@xa by \pgf@x%
    \advance\pgf@ya by \pgf@y%
    \pgf@sys@bp@correct{\pgf@x}%
    \pgf@sys@bp@correct{\pgf@y}%
    \pgf@sys@bp@correct{\pgf@xa}%
    \pgf@sys@bp@correct{\pgf@ya}%
    \immediate\pdfxform 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] >> >>}\pgfutil@tempboxa% <<
    \xdef\pgfutil@tempa{\hbox{\noexpand\pdfrefxform\the\pdflastxform}}%
  }%
  \global\expandafter\let\csname @pgfshading#1!\endcsname=\pgfutil@tempa
}%
\def\pgfsys@functionalshading#1#2#3#4{%
  {%
    \pgf@process{#2}%
    \pgf@xa=\pgf@x%
    \pgf@ya=\pgf@y%
    \pgf@process{#3}%
    \pgf@xb=\pgf@x%
    \pgf@yb=\pgf@y%
    \advance\pgf@x by-\pgf@xa%
    \advance\pgf@y by-\pgf@ya%
    \setbox\pgfutil@tempboxa=\hbox to\pgf@x{\vbox to\pgf@y{\vfil\pgfsys@invoke{/Sh sh}}\hfil}%
    \pgf@sys@bp@correct{\pgf@xa}%
    \pgf@sys@bp@correct{\pgf@ya}%
    \pgf@sys@bp@correct{\pgf@xb}%
    \pgf@sys@bp@correct{\pgf@yb}%
    \pgf@xc=-\pgf@xa%
    \pgf@yc=-\pgf@ya%
    % Now build the function
    \pdfobj
    stream
    attr
    {
      /FunctionType 4
      /Domain [\pgf@sys@tonumber{\pgf@xa}\space\pgf@sys@tonumber{\pgf@xb}\space\pgf@sys@tonumber{\pgf@ya}\space\pgf@sys@tonumber{\pgf@yb}]
      /Range [\pgf@shading@functional@range]
    }
    {{#4}}%
    \edef\pgf@temp@num{\the\pdflastobj}%
    \pdfxform resources {%
      /Shading << /Sh << /ShadingType 1
      /ColorSpace \pgf@shading@device\space
      /Matrix [1 0 0 1 \pgf@sys@tonumber{\pgf@xc}\space\pgf@sys@tonumber{\pgf@yc}]
      /Domain [\pgf@sys@tonumber{\pgf@xa}\space\pgf@sys@tonumber{\pgf@xb}\space\pgf@sys@tonumber{\pgf@ya}\space\pgf@sys@tonumber{\pgf@yb}]
      /Function \pgf@temp@num\space 0 R
      >> >>}\pgfutil@tempboxa% <<
    \xdef\pgfutil@tempa{\hbox{%
      \noexpand\pdfrefxform\the\pdflastxform%
      \noexpand\pdfrefobj\pgf@temp@num%
    }}%
  }%
  \global\expandafter\let\csname @pgfshading#1!\endcsname=\pgfutil@tempa
}



% Patterns

\def\pgfsys@declarepattern#1#2#3#4#5#6#7{%
  % Start building the pattern dictionary:
  \pgf@xa=#2\relax%
  \pgf@ya=#3\relax%
  \pgf@xb=#4\relax%
  \pgf@yb=#5\relax%
  \pgf@xc=#6\relax%
  \pgf@yc=#7\relax%
  \pgf@sys@bp@correct\pgf@xa%
  \pgf@sys@bp@correct\pgf@ya%
  \pgf@sys@bp@correct\pgf@xb%
  \pgf@sys@bp@correct\pgf@yb%
  \pgf@sys@bp@correct\pgf@xc%
  \pgf@sys@bp@correct\pgf@yc%
  \pgfsys@@declarepattern{#1}%
}

\def\pgfsys@@declarepattern#1#2#3#4#5#6#7#8#9{%
  \pgfutil@tempdima=#6\relax%
  \pgfutil@tempdimb=#7\relax%
  \pgf@sys@bp@correct\pgfutil@tempdima%
  \pgf@sys@bp@correct\pgfutil@tempdimb%
  % Now create the pattern object:
  \immediate\pdfobj stream
  attr
  {
    /Type /Pattern
    /PatternType 1
    /PaintType \ifnum#9=0 2 \else 1 \fi
    /TilingType 1
    /BBox [\pgf@sys@tonumber\pgf@xa\space\pgf@sys@tonumber\pgf@ya\space\pgf@sys@tonumber\pgf@xb\space\pgf@sys@tonumber\pgf@yb]
    /XStep \pgf@sys@tonumber\pgf@xc\space
    /YStep \pgf@sys@tonumber\pgf@yc\space
    /Matrix [#2\space#3\space#4\space#5\space\pgf@sys@tonumber\pgfutil@tempdima\space\pgf@sys@tonumber\pgfutil@tempdimb]
    /Resources << >> %<<
  }
  {#8}%
  \pgfutil@addpdfresource@patterns{/pgfpat#1\space \the\pdflastobj\space 0 R}%
}

\def\pgfsys@setpatternuncolored#1#2#3#4{%
  \pgfsysprotocol@literal{/pgfprgb cs #2 #3 #4 /pgfpat#1\space scn}%
}

\def\pgfsys@setpatterncolored#1{%
  \pgfsysprotocol@literal{/Pattern cs /pgfpat#1\space scn}%
}



\def\pgfsys@papersize#1#2{\pdfpageheight#2\relax\pdfpagewidth#1\relax}

\def\pgfsys@global@papersize#1#2{\global\pdfpageheight#2\relax\global\pdfpagewidth#1\relax}

\ifx\paperheight\@undefined
  \def\pgfsys@thepageheight{\pdfpageheight}
  \def\pgfsys@thepagewidth{\pdfpagewidth}
\fi


%
% Position tracking
%
\def\pgfsys@markposition#1{%
  \pdfsavepos%
  \edef\pgf@temp{#1}%
  \expandafter\pgfutil@writetoaux\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}}%
  \pgfutil@check@rerun{#1}{{#2}{#3}}%
}

\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{\pgfqpoint{\hoffset}{\voffset}}


%
% Opacity masks
%
\def\pgfsys@fadingfrombox#1#2{%
  {%
    \pgf@sys@pdf@check@resources%
    \pgf@x=-.5\wd#2%
    \pgf@y=-.5\ht#2%
    \advance\pgf@y by.5\dp#2%
    \expandafter\xdef\csname pgfsmasktrans@#1\endcsname{%
      \noexpand\pgftransformcm{1}{0}{0}{1}{\noexpand\pgfqpoint{\the\pgf@x}{\the\pgf@y}}}%
    \pdfxform resources { \pgf@sys@pdf@possible@resources } #2%
    \expandafter\xdef\csname pgfsmaskxform@#1\endcsname{\the\pdflastxform}%
  }%
}
\def\pgfsys@usefading#1#2#3#4#5#6#7{%
  \expandafter\ifx\csname pgfsmaskxform@#1\endcsname\relax%
    \pgferror{Undefined fading '#1'}%
  \else%
    {%
      \expandafter\ifx\csname pgfsmask@#1\endcsname\relax%
        \pgf@sys@pdf@install@mask{#1}%
      \fi%
      \pgftransformreset%
      \pgftransformcm{#2}{#3}{#4}{#5}{\pgfpoint{#6}{#7}}%
      \csname pgfsmasktrans@#1\endcsname%
      {%
        \pgflowlevelsynccm%
        \pgfsys@invoke{/pgfsmask\csname pgfsmask@#1\endcsname\space gs}%
      }%
      \pgftransforminvert%
      \pgflowlevelsynccm%
    }%
  \fi
}

\def\pgf@sys@pdf@install@mask#1{%
  \setbox\pgfutil@tempboxa=\hbox{\pdfrefxform\csname pgfsmaskxform@#1\endcsname}
  \immediate\pdfxform%
    attr {
    /Group
    <<
      /S /Transparency
      /CS /DeviceGray
    >>
  }% <<
  \pgfutil@tempboxa%
  \pgfutil@addpdfresource@extgs{%
    /pgfsmask\the\pdflastxform\space
    <<
      /SMask
      <<
        /S /Luminosity
        /G \the\pdflastxform\space 0 R
      >>
    >> } %<<
  \expandafter\xdef\csname pgfsmask@#1\endcsname{\the\pdflastxform}%
}

%
% Transparency groups
%
\def\pgfsys@transparencygroupfrombox#1{%
  \pgf@sys@pdf@check@resources%
  \pdfxform
  attr { /Group << /S /Transparency
    /I \ifpgfsys@transparency@group@isolated true \else false \fi
    /K \ifpgfsys@transparency@group@knockout true \else false \fi >> } %<<
  resources { \pgf@sys@pdf@possible@resources }
  #1%
  \setbox#1=\hbox{\pdfrefxform\pdflastxform}%
}




%
% Resource management
%

\def\pgf@sys@setuppdfresources@plain{%
  % This command will setup pdf resource in plain and in latex
  % mode. ConTeXt has its own handler
  % Page resources (they are kept in objects and only written at the
  % very end)
  \pdfobj reserveobjnum \edef\pgf@sys@pdf@extgs@objnum{\the\pdflastobj}
  \pdfobj reserveobjnum \edef\pgf@sys@pdf@pattern@objnum{\the\pdflastobj}
  \pdfobj reserveobjnum \edef\pgf@sys@pdf@colrospaces@objnum{\the\pdflastobj}
  \def\pgf@sys@pdf@possible@resources{%
    /ColorSpace \pgf@sys@pdf@colrospaces@objnum\space 0 R
    /Pattern    \pgf@sys@pdf@pattern@objnum\space 0 R
    /ExtGState  \pgf@sys@pdf@extgs@objnum\space 0 R
  }
  \let\pgf@sys@pdf@check@resources=\relax%
  \def\pgf@sys@pdf@install@pageresources{
    {
      \edef\temp{
        \pgf@sys@pdf@possible@resources
      }
      \expandafter\global\expandafter\pdfpageresources\expandafter{\temp}
    }
  }
  \pgf@sys@pdf@install@pageresources
  \expandafter\pgfutil@everybye\expandafter{%
    \the\pgfutil@everybye%
    \immediate \pdfobj useobjnum \pgf@sys@pdf@extgs@objnum {<<\pgf@sys@pgf@resource@list@extgs>>}%<<
    \immediate \pdfobj useobjnum \pgf@sys@pdf@pattern@objnum {<<\pgf@sys@pgf@resource@list@patterns>>}%<<
    \immediate \pdfobj useobjnum \pgf@sys@pdf@colrospaces@objnum {<<\pgf@sys@pgf@resource@list@colorspaces>>}%<<
  }
  \let\pgf@sys@pgf@resource@list@extgs=\pgfutil@empty%
  \let\pgf@sys@pgf@resource@list@patterns=\pgfutil@empty%
  \let\pgf@sys@pgf@resource@list@colorspaces=\pgfutil@empty%
  \def\pgf@sys@addpdfresource@extgs@plain##1{\xdef\pgf@sys@pgf@resource@list@extgs{\pgf@sys@pgf@resource@list@extgs\space##1}}
  \def\pgf@sys@addpdfresource@patterns@plain##1{\xdef\pgf@sys@pgf@resource@list@patterns{\pgf@sys@pgf@resource@list@patterns\space##1}}
  \def\pgf@sys@addpdfresource@colorspaces@plain##1{\xdef\pgf@sys@pgf@resource@list@colorspaces{\pgf@sys@pgf@resource@list@colorspaces\space##1}}
}
\pgfutil@setuppdfresources % possibly call the above

\pgfutil@addpdfresource@colorspaces{ /pgfprgb [/Pattern /DeviceRGB] }

\def\pgfsys@color@unstacked#1{%
    \pdfliteral{\csname\string\color@#1\endcsname}%
}

\endinput


%%% Local Variables:
%%% mode: latex
%%% End:
