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%% background.sty 26 Apr 2002
%%-------------------------------------------------------------
%% History:
%% added options ignore and dvipdfm
%% runs with vlatex and dvipdfm 10 Nov 2001
%% added some macros for including things into 26 Apr 2002
%% the background:
%% \bgadd{...} add something to the top left corner
%% \bgaddcenter{...} add something to the center
%% \bgclear clear all added elements
%% examples:
%% \bgadd{\vspace{1cm}\hspace{2cm}\includegraphics[width=3cm]{pic.png}}
%% \bgcenter{Centered Text}
%%
%%
%% Take care: because we have to insert a pdf comment starting with
%% the letter '%' the catcode of '%' will be changed temporarily.
%% Options
\newif\ifbackground@ignore \background@ignorefalse
\newif\ifbackground@dvipdfm \background@dvipdfmfalse
\newif\ifbackground@bgadd \background@bgaddfalse
\DeclareOption{ignore}{\background@ignoretrue}
\DeclareOption{dvipdfm}{\background@dvipdfmtrue}
\DeclareOption{bgadd}{\background@bgaddtrue}
\ProcessOptions
%% requires package pause.sty
\ifbackground@dvipdfm
\RequirePackage[dvipdfm]{pause}
\else
\RequirePackage{pause}
\fi
%%
%% background picture macros, based on a macro by
%% Rolf Niepraschk (niepraschk@ptb.de)
%%
\ifbackground@bgadd
\RequirePackage{eso-pic}
\ifbackground@ignore
\def\bgadd#1{}
\def\bgaddcenter#1{}
\def\bgclear{}
\else
\def\bgadd#1{%
\AddToShipoutPicture{
\setlength{\unitlength}{1pt}% default
\put(0,\strip@pt\paperheight){%
\parbox[t][\paperheight]{\paperwidth}{\vspace{0pt}#1}
}
}
}
\def\bgaddcenter#1{%
\bgadd{%
\vfill
\centering#1
\vfill
}
}
\def\bgclear{\ClearShipoutPicture}
\fi
\fi
\def\hpagecolor{\@ifnextchar [{\bg@hpagecolorTwo}{\bg@hpagecolor}}%
\def\vpagecolor{\@ifnextchar [{\bg@vpagecolorTwo}{\bg@vpagecolor}}%
\ifbackground@ignore
\ifx\pagecolor\undefined
% a dummy definition
\newcommand\pagecolor[1]{}%
\message{Warning, pagecolor definitions ignored for non pdf processing}%
\fi
\def\bg@hpagecolorTwo[#1]#2{}%
\def\bg@vpagecolorTwo[#1]#2{}%
\def\bg@hpagecolor#1{}%
\def\bg@vpagecolor#1{}%
\else
{\catcode`\%=11\catcode`\!=14 !make '!' the comment character for now
\gdef\pagecolor#1{\@ifundefined{\string\color @#1}!
{\message{pagecolor: color #1 is undefined}}!
{ \pdfliteral{%mbackground \pppp@colortostring{#1}}}!
}!
\gdef\bg@vpagecolorTwo[#1]#2{\@ifundefined{\string\color @#1}!
{\message{vpagestripes: color #1 is undefined}}!
{\@ifundefined{\string\color @#2}!
{\message{vpagestripes: color #2 is undefined}}!
{\pdfliteral{%gradbackground vt \pppp@colortostring{#1}/\pppp@colortostring{#2}}}}!
}!
\gdef\bg@hpagecolorTwo[#1]#2{\@ifundefined{\string\color @#1}!
{\message{pagestripes: color #1 is undefined}}!
{\@ifundefined{\string\color @#2}!
{\message{pagestripes: color #2 is undefined}}!
{\pdfliteral{%gradbackground ht \pppp@colortostring{#1}/\pppp@colortostring{#2}}}}!
}!
\gdef\bg@hpagecolor#1{\@ifundefined{\string\color @#1}!
{\message{hpagecolor: color #1 is undefined}}!
{\pdfliteral{%gradbackground ho \pppp@colortostring{#1}}}}!
\gdef\bg@vpagecolor#1{\@ifundefined{\string\color @#1}!
{\message{vpagecolor: color #1 is undefined}}!
{\pdfliteral{%gradbackground vo \pppp@colortostring{#1}}}}!
}%
\fi
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