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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% This file is a copy of some part of PGF/Tikz.
%%% It has been copied here to provide :
%%% - compatibility with older PGF versions
%%% - availability of PGF contributions by Christian Feuersaenger
%%% which are necessary or helpful for pgfplots.
%%%
%%% For reasons of simplicity, I have copied the whole file, including own contributions AND
%%% PGF parts. The copyrights are as they appear in PGF.
%%%
%%% Note that pgfplots has compatible licenses.
%%%
%%% This copy has been modified in the following ways:
%%% - nested \input commands have been updated
%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% Date of this copy: Di 29. Dez 22:11:16 CET 2009 %%%
% Copyright 2008 by Christian Feuersaenger
%
% 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.
%
% In addition to the above licenses, this particular file may also be
% directly inlined into other documents and this copyright notice may
% be removed. Additionally, when you inline this file, you may modify
% it as needed and you may remove comments.
%
% This file is intended to be distributed or even inlined into a file
% when a document needs to be typeset on a system that does not have
% pgf/TikZ installed.
%
% It replaces \tikzpicture/ \endtikzpicture and \tikz and invokes the
% \includegraphics with the correct file name instead.
\RequirePackage{graphicx}
\toksdef\t@tikzexternal@tmpa=0
\toksdef\t@tikzexternal@tmpb=1
\def\tikzexternalize{\@ifnextchar[{\tikzexternalize@opt}{\tikzexternalize@opt[]}}%
\def\tikzexternalize@opt[#1]#2{\def\tikzexternal@realjob{#2}}
\def\tikzsetnextfilename#1{\gdef\tikzexternal@nextfile{#1}}
\def\tikzsetexternalprefix#1{\def\tikzexternal@filenameprefix{#1}}
\def\tikzsetfigurename#1{\def\tikzexternal@figurename{#1}}%
\tikzsetnextfilename{}
\tikzsetexternalprefix{}
\tikzsetfigurename{\tikzexternal@realjob-figure}%
\long\def\tikzpicture#1\end#2{% collect every thing up to \end{tikzpicture}
\def\tikzexternal@laTeX@collectpicture@@{#2}%
\ifx\tikzexternal@laTeX@collectpicture@@\tikzexternal@laTeX@tikzpicturestring
\tikzexternal@image
\end{tikzpicture}%
\else
\expandafter
\tikzpicture
\fi
}%
\def\endtikzpicture{}
\def\tikzexternal@laTeX@tikzpicturestring{tikzpicture}%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Replacement for \tikz short command:
\def\tikz{\@ifnextchar[{\tikz@opt}{\tikz@opt[]}}
\def\tikz@opt[#1]{\@ifnextchar\bgroup{\tikz@opt@{#1}}{\tikz@opt@@{#1}}}
\def\tikz@opt@#1#2{\tikz@opt@process{#1}{#2}}
\def\tikz@opt@@#1{%
\def\tikz@next{\tikz@collectnormalsemicolon{#1}}%
\ifnum\the\catcode`\;=\active\relax%
\def\tikz@next{\tikz@collectactivesemicolon{#1}}%
\fi%
\tikz@next}
\def\tikz@collectnormalsemicolon#1#2;{\tikz@opt@process{#1}{#2;}}
{
\catcode`\;=\active
\gdef\tikz@collectactivesemicolon#1#2;{%
\tikz@opt@process{#1}{#2;}%
}
}
\def\tikz@opt@process#1#2{\tikzexternal@image}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\def\tikzexternal@image{%
\leavevmode
\begingroup
\t@tikzexternal@tmpa=\expandafter{\tikzexternal@filenameprefix}%
\ifx\tikzexternal@nextfile\empty
\expandafter\ifx\csname c@tikzext@no@\tikzexternal@figurename\endcsname\relax
\expandafter\gdef\csname c@tikzext@no@\tikzexternal@figurename\endcsname{0}%
\fi
\t@tikzexternal@tmpb=\expandafter{\tikzexternal@figurename}%
\count0=\csname c@tikzext@no@\tikzexternal@figurename\endcsname
\xdef\tikzexternal@curfilename{\the\t@tikzexternal@tmpa\the\t@tikzexternal@tmpb\the\count0 }%
\advance\count0 by1\relax
\expandafter\xdef\csname c@tikzext@no@\tikzexternal@figurename\endcsname{\the\count0 }%
\else
\t@tikzexternal@tmpb=\expandafter{\tikzexternal@nextfile}%
\xdef\tikzexternal@curfilename{\the\t@tikzexternal@tmpa\the\t@tikzexternal@tmpb}%
\fi
\endgroup
\global\let\tikzexternal@nextfile=\empty
\tikzexternalimage\tikzexternal@curfilename
}%
\def\tikzexternalimage#1{%
% now check for (optional) .dpth files for the 'baseline' option:
\begingroup
\setbox1=\hbox{\includegraphics{#1}}%
\openin1=#1.dpth
\ifeof1 \box1
\else
\read1 to\pgfincludeexternalgraphics@dp \closein1
\dimen0=\pgfincludeexternalgraphics@dp\relax
\hbox{\lower\dimen0\box1}%
\fi
\endgroup
}
\def\tikzset#1{}\def\pgfkeys#1{}\def\pgfqkeys#1#2{}
\long\def\beginpgfgraphicnamed#1#2\endpgfgraphicnamed{\tikzexternalimage{#1}}
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