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% overpic.sty
% Copyright 1999 Rolf Niepraschk, niepraschk@ptb.de
% This program can be redistributed and/or modified under the terms
% of the LaTeX Project Public License Distributed from CTAN
% archives in directory macros/latex/base/lppl.txt; either
% version 1 of the License, or any later version.
% \changes{v0.51}{1999/03/02}{New (LPPL) license}
% \changes{v0.52}{1999/07/04}{Correction of wrong height calculation
% (if depth != 0)}
\def\fileversion{v0.52}
\def\filedate{1999/07/04}%
\ProvidesPackage{overpic}
[\filedate\space\fileversion\space\space Overwriting eps pictures]
\NeedsTeXFormat{LaTeX2e}
\typeout{Package: overpic \fileversion\space <\filedate> (RN)}
\newcommand\OVP@scale{}
\DeclareOption{percent}{\renewcommand\OVP@scale{100}}
\DeclareOption{permil}{\renewcommand\OVP@scale{\@m}}
\DeclareOption{abs}{\renewcommand\OVP@scale{\z@}}
\DeclareOption*{\PassOptionsToPackage{\CurrentOption}{graphicx}}
\ExecuteOptions{percent}
\ProcessOptions
\RequirePackage{graphicx,epic}
\newif\ifGin@grid
\define@key{Gin}{grid}[true]{\lowercase{\Gin@boolkey{#1}}{grid}}
\define@key{Gin}{tics}{\count@=#1}
\define@key{Gin}{unit}{\setlength{\@tempdima}{#1}}
\ifnum\OVP@scale>\z@%
\ifnum\OVP@scale=\@m%
\typeout{overpic: relative positioning in permil}%
\else%
\typeout{overpic: relative positioning in percent}%
\fi%
\newcommand\OVP@calc{%
\ifnum\@tempcnta>\@tempcntb%
\divide\@tempcnta by \OVP@scale%
\setlength\unitlength{\@tempcnta sp}%
\@tempcnta=\OVP@scale%
\divide\@tempcntb by \unitlength%
\else%
\divide\@tempcntb by \OVP@scale%
\setlength\unitlength{\@tempcntb sp}%
\@tempcntb=\OVP@scale%
\divide\@tempcnta by \unitlength%
\fi%
\ifnum\count@=\z@%
\count@=\OVP@scale\divide\count@ by 10%
\fi%
}%
\else%
\typeout{overpic: absolute positioning in \unitlength}%
\newcommand\OVP@calc{%
\setlength{\unitlength}{\@tempdima}%
\divide\@tempcnta by \unitlength%
\divide\@tempcntb by \unitlength%
\ifnum\count@=\z@\count@=10\fi%
}%
\fi%
\newenvironment{overpic}[2][]{%
\sbox{\z@}{\includegraphics[#1]{#2}}%
\settodepth{\@tempcnta}{\usebox{\z@}}%
\settoheight{\@tempcntb}{\usebox{\z@}}%
\advance\@tempcntb\@tempcnta%
\settowidth{\@tempcnta}{\usebox{\z@}}%
\setlength{\@tempdima}{\unitlength}%
\count@=\z@\Gin@gridfalse\setkeys{Gin}{#1}%
%
\OVP@calc%
%
\begin{picture}(\@tempcnta,\@tempcntb)%
\put(0,0){\makebox(0,0)[bl]{\usebox{\z@}}}%
\ifGin@grid%
\put(0,0){\normalfont\fontsize\@viipt\@viiipt\selectfont%
\grid(\@tempcnta,\@tempcntb)(\count@,\count@)[0,0]}%
\fi%
}{%
\end{picture}%
}%
\endinput
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