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% Copyright 2006 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.

\ProvidesFileRCS $Header: /cvsroot/pgf/pgf/generic/pgf/systemlayer/pgfsys-common-pdf-via-dvi.def,v 1.7 2008/05/19 12:52:49 tantau Exp $

% Common driver commands for all drivers that produce pdf via the
% detour of a dvi file



% Hboxes

\def\pgfsys@hbox#1{%
  \pgfsys@invoke{q -1 0 0 -1 0 0 cm}%
  \special{pdf: content -1 0 0 -1 0 0 cm 3 Tr q}% translate to
                                % original coordinate system and do
                                % not show anything
  {\hbox to 0pt{\pgfutil@font@normalfont\pgfutil@selectfont.\hss}}% enforce font change
  \pgfsys@invoke{0 Tr}%
    \wd#1=0pt%
    \ht#1=0pt%
    \dp#1=0pt%
    \box#1
  \pgfsys@invoke{n Q Q}%
}
\def\pgfsys@hboxsynced#1{%
  {%
    \pgfsys@beginscope%
    \setbox\pgf@hbox=\hbox{%
      \hskip\pgf@pt@x%
      \raise\pgf@pt@y\hbox{%
        \pgf@pt@x=0pt%
        \pgf@pt@y=0pt%
        \special{pdf: content q}%
        \pgflowlevelsynccm% 
        \pgfsys@invoke{q -1 0 0 -1 0 0 cm}%
        \special{pdf: content -1 0 0 -1 0 0 cm q}% translate to original coordinate system
        \wd#1=0pt%
        \ht#1=0pt%
        \dp#1=0pt%
        \box#1%
        \pgfsys@invoke{n Q Q Q}%
      }%
      \hss%
    }%
    \wd\pgf@hbox=0pt%
    \ht\pgf@hbox=0pt%
    \dp\pgf@hbox=0pt%
    \pgfsys@hbox\pgf@hbox%
    \pgfsys@endscope%
  }%
}

\def\pgfsys@beginpicture{%
  \pgfsys@invoke{3 Tr}%
  \hbox to 0pt{\pgfutil@font@normalfont\pgfutil@selectfont.\hss}% enforce font change
  \pgfsys@invoke{0 Tr}%
  \special{pdf: content q}}
\def\pgfsys@endpicture{%
  \pgfsys@invoke{n Q}%
}
\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#1 width \the\pgf@max\space height \the\pgf@y}}}\@temp%
    \edef\@temp{\noexpand\pgfutil@insertatbegincurrentpage{\special{pdf: put @resources <<
      /Shading << /Sh << /ShadingType 2
      /ColorSpace /DeviceRGB
      /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}}%
    \expandafter\xdef\csname @pgfshading#1!\endcsname{%
      \hbox to\the\pgf@max{\vbox to#2{\vfil\special{pdf: usexobj @pgfshade#1}}\hfil}}% 
  }%
}
\def\pgfsys@vertshading#1#2#3{%
  {%
    \pgf@parsefunc{#3}%
    \pgf@process{\pgfpoint{\pgf@max}{#2}}%
    \edef\@temp{\noexpand\pgfutil@insertatbegincurrentpage{\special{pdf: beginxobj @pgfshade#1 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 /DeviceRGB
      /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}}%
    \expandafter\xdef\csname @pgfshading#1!\endcsname{%
      \hbox to#2{\vbox to\the\pgf@max{\vfil\special{pdf: usexobj @pgfshade#1}}\hfil}}% 
  }%
}
\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#1 width \the\pgfutil@tempdima\space height \the\pgfutil@tempdima}}}\@temp%
    \edef\@temp{\noexpand\pgfutil@insertatbegincurrentpage{\special{pdf: put @resources <<
      /Shading << /Sh << /ShadingType 3
      /ColorSpace /DeviceRGB
      /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}}%
    \expandafter\xdef\csname @pgfshading#1!\endcsname{%
      \hbox to\the\pgfutil@tempdima{\vbox to\the\pgfutil@tempdima{\vfil\special{pdf: usexobj @pgfshade#1}}\hfil}}% 
  }%
}%

\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:

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