% Copyright 2007 by 
% Philippe Dreuw <dreuw@cs.rwth-aachen.de> and 
% Thomas Deselaers <deselaers@cs.rwth-aachen.de>
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Public License.
%
%
% ChangeLog:
%
% 1.08 - supports external printer definition files
%      - added grid mode option
%      - renamed beamer specific variables
%      - added font normalizing, so that scale=1.0 is default size for all DIN-A(n) sizes
% 1.07 - bugfixed custom size handling, portrait or landscape settings are ignored now
% 1.06 - added the type1cm package for scalable math fonts
% 1.05 - added version check for xkeyval package
% 1.04 - added custom size handling
% 1.03 - improved predefined size handling
% 1.02 - minor bugfixes
% 1.01 - bugfixed size handling
% 1.00 - first beamerposter release
%
\def\beamerposter@name{beamerposter}
\def\beamerposter@version{1.08}
\def\beamerposter@date{2009/08/27}
\def\beamerposter@msg{latex-beamer poster extension}
\def\beamerposter@releaseinfo{\beamerposter@date \space v.\beamerposter@version \space \beamerposter@msg}
\typeout{Package \beamerposter@name: \beamerposter@releaseinfo} 

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{\beamerposter@name}[\beamerposter@releaseinfo]
\RequirePackage{xkeyval}[2006/11/18]
\RequirePackage{type1cm} %% get it from ftp://cam.ctan.org/tex-archive/macros/latex/contrib/type1cm.zip

\newif\if@beamerposter@portrait
\newif\if@beamerposter@customsize
\newif\if@beamerposter@extern
\newif\if@beamerposter@debug


\DeclareOptionX{size}[a0]{
  \typeout{\beamerposter@name: checking size input, please wait.}
  \XKV@cc*+[\val\nr]{#1}{a0b,a0,a1,a2,a3,a4,custom}{%
    \typeout{\beamerposter@name: the input \val\ \nr\ was correct, we proceed.}
    \ifcase\nr\relax
    %a0b
    \edef\paperwidthValue{119}
    \edef\paperheightValue{88}
    \edef\textwidthValue{116}
    \edef\textheightValue{88}
    \edef\fontscale{1.0}
    \or
    %a0
    \edef\paperwidthValue{118.82}
    \edef\paperheightValue{83.96}
    \edef\textwidthValue{117.82}
    \edef\textheightValue{82.96}
    \edef\fontscale{1.0}
    \or
    %a1
    \edef\paperwidthValue{83.96}
    \edef\paperheightValue{59.4}
    \edef\textwidthValue{82.96}
    \edef\textheightValue{58.4}
    \edef\fontscale{0.70710678} %= (1/sqrt(2))^1
    \or
    %a2
    \edef\paperwidthValue{59.4}
    \edef\paperheightValue{41.98}
    \edef\textwidthValue{58.4}
    \edef\textheightValue{40.98}
    \edef\fontscale{0.5} %= (1/sqrt(2))^2
    \or
    %a3
    \edef\paperwidthValue{41.98}
    \edef\paperheightValue{29.7}
    \edef\textwidthValue{40.98}
    \edef\textheightValue{28.7}
    \edef\fontscale{0.35355339} %= (1/sqrt(2))^3
    \or
    %a4
    \edef\paperwidthValue{29.7}
    \edef\paperheightValue{21.0}
    \edef\textwidthValue{28.7}
    \edef\textheightValue{20.0}
    \edef\fontscale{0.25} %= (1/sqrt(2))^4
    \or
    \@beamerposter@customsizetrue
    \fi    
  }{%
    \PackageWarning{\beamerposter@name}{the input \val\ was incorrect and was ignored.}
  }%
  \typeout{\beamerposter@name: finished size input check.}
}
\DeclareOptionX{orientation}[portrait]{
  \typeout{\beamerposter@name: checking orientation input, please wait.}
  \XKV@cc*+[\val\nr]{#1}{portrait,landscape}{%
    \typeout{\beamerposter@name: the input \val\ \nr\ was correct, we proceed.}
    \ifcase\nr\relax
    \@beamerposter@portraittrue
    \or
    \@beamerposter@portraitfalse
    \fi    
  }{%
    \PackageWarning{\beamerposter@name}{the input \val\ was incorrect and was ignored.}
  }%
  \typeout{\beamerposter@name: finished orientation check.}
}
\DeclareOptionX{scale}[1.0]{\edef\myfontscale{#1}\typeout{\beamerposter@name: myfontscale=\myfontscale}}
\DeclareOptionX{width}{\edef\customwidth{#1}\typeout{\beamerposter@name: custom poster width=\customwidth}}
\DeclareOptionX{height}{\edef\customheight{#1}\typeout{\beamerposter@name: custom poster height=\customheight}}
\DeclareOptionX{debug}{\typeout{\beamerposter@name: enabled debug mode}\@beamerposter@debugtrue}
\DeclareOptionX{grid}{\typeout{\beamerposter@name: enabling grid}\beamertemplategridbackground[1cm]}% Display a grid to help align images
\DeclareOptionX*{\edef\printerToUse{\CurrentOption.df}\@beamerposter@externtrue}%
%\DeclareOptionX*{\PackageWarning{\beamerposter@name}{Unknown option ignored: \CurrentOption}}
%\DeclareOptionX*{\PassOptionsToClass{\CurrentOption}{beamer}}
\ExecuteOptionsX{size=a0,scale=1.0}
\ProcessOptionsX\relax

\if@beamerposter@debug
  \RequirePackage[debug]{fp}
\else
  \RequirePackage{fp}
\fi

%% normalize scale depending on poster size
\FPupn{\myfontscale}{myfontscale fontscale * 2 round}


%% swap sizes for portrait orientation
\if@beamerposter@portrait
  \newdimen\tmp
  \setlength{\tmp}{\paperwidthValue cm}
  \setlength{\paperwidth}{\paperheightValue cm}
  \setlength{\paperheight}{\tmp}
  \setlength{\tmp}{\textwidthValue cm}
  \setlength{\textwidth}{\textheightValue cm}
  \setlength{\textheight}{\tmp}
\else
  \setlength{\paperwidth}{\paperwidthValue cm}
  \setlength{\paperheight}{\paperheightValue cm}
  \setlength{\textwidth}{\textwidthValue cm}
  \setlength{\textheight}{\textheightValue cm}
\fi

%% overwrite dimensions if custom size
\if@beamerposter@customsize
  \setlength{\paperwidth}{\customwidth cm}
  \setlength{\paperheight}{\customheight cm}
  \FPupn{\resulttextwidth}{1 customwidth  -}
  \FPupn{\resulttextheight}{1 customheight -}
  \setlength{\textwidth}{\resulttextwidth cm}
  \setlength{\textheight}{\resulttextheight cm}
\fi

%% Setting proper dimensions for a DIN A0 printer
\setlength{\headheight}{0 cm}
\setlength{\headsep}{0 cm}
\setlength{\topmargin}{-12.7 mm}     % -1in +1.47cm
\setlength{\oddsidemargin}{-25.4 mm} % -1in +0.4cm

%% For the page layout
\if@beamerposter@debug
\typeout{\beamerposter@name: paperwidth=\the\paperwidth, paperheight=\the\paperheight}
\typeout{\beamerposter@name: textwidth=\the\textwidth, textwidth=\the\textheight}
\typeout{\beamerposter@name: fontscale=\fontscale myfontscale=\myfontscale}
\fi
\geometry{
  paperwidth=\the\paperwidth,
  paperheight=\the\paperheight,
  hmargin=1cm,%
  vmargin=0cm,%
  head=0.5cm, % 
  headsep=0pt,%
  foot=0.5cm  % 
}

%% now load printer definitions from file, calc poster ratios, scale
%% to maximum printer size, and check if they still fit
\if@beamerposter@extern
  \InputIfFileExists{\printerToUse}{\typeout{load \printerToUse}}{\PackageError{\beamerposter@name}{\printerToUse\space not found!}{Please use another printer definition file}}
  \ifx\printermaxwidthValue\@empty%
    \relax%
  \else%
    \FPsub{\resultmaxwidth}{\printermaxwidthValue}{\paperwidthValue}
    \FPifneg{\resultmaxwidth}
    \PackageError{\beamerposter@name}{%
      resultmaxwidth=\resultmaxwidth \MessageBreak
      printermaxwidthValue=\printermaxwidthValue \MessageBreak
      paperwidthValue=\paperwidthValue \MessageBreak 
      The specified poster dimensions might not be printable using
      '\printerToUse'.
    }{%
      Try to reduce your poster dimension and have a look at the aspect ratio.
    }
    \else
      \relax
    \fi
  \fi
%\fi

%% scalable vector fonts
\edef\fontSizeX{12}\edef\fontSizeY{14}
\FPupn{\resulttinyX}{myfontscale fontSizeX * 2 round}
\FPupn{\resulttinyY}{myfontscale fontSizeY * 2 round}
\renewcommand*{\tiny}{\fontsize{\resulttinyX}{\resulttinyY}\selectfont}

\edef\fontSizeX{14.4}\edef\fontSizeY{18}   
\FPupn{\resultscriptsizeX}{myfontscale fontSizeX * 2 round}
\FPupn{\resultscriptsizeY}{myfontscale fontSizeY * 2 round}
\renewcommand*{\scriptsize}{\fontsize{\resultscriptsizeX}{\resultscriptsizeY}\selectfont}

\edef\fontSizeX{17.28}\edef\fontSizeY{22}
\FPupn{\resultfootnotesizeX}{myfontscale fontSizeX * 2 round}
\FPupn{\resultfootnotesizeY}{myfontscale fontSizeY * 2 round}
\renewcommand*{\footnotesize}{\fontsize{\resultfootnotesizeX}{\resultfootnotesizeY}\selectfont}

\edef\fontSizeX{20.74}\edef\fontSizeY{25}
\FPupn{\resultsmallX}{myfontscale fontSizeX * 2 round}
\FPupn{\resultsmallY}{myfontscale fontSizeY * 2 round}
\renewcommand*{\small}{\fontsize{\resultsmallX}{\resultsmallY}\selectfont}

\edef\fontSizeX{24.88}\edef\fontSizeY{30}
\FPupn{\resultnormalsizeX}{myfontscale fontSizeX * 2 round}
\FPupn{\resultnormalsizeY}{myfontscale fontSizeY * 2 round}
\renewcommand*{\normalsize}{\fontsize{\resultnormalsizeX}{\resultnormalsizeY}\selectfont}

\edef\fontSizeX{29.86}\edef\fontSizeY{37}
\FPupn{\resultlargeX}{myfontscale fontSizeX * 2 round}
\FPupn{\resultlargeY}{myfontscale fontSizeY * 2 round}
\renewcommand*{\large}{\fontsize{\resultlargeX}{\resultlargeY}\selectfont}

\edef\fontSizeX{35.83}\edef\fontSizeY{45}
\FPupn{\resultLargeX}{myfontscale fontSizeX * 2 round}
\FPupn{\resultLargeY}{myfontscale fontSizeY * 2 round}
\renewcommand*{\Large}{\fontsize{\resultLargeX}{\resultLargeY}\selectfont}

\edef\fontSizeX{43}\edef\fontSizeY{54}
\FPupn{\resultLARGEX}{myfontscale fontSizeX * 2 round}
\FPupn{\resultLARGEY}{myfontscale fontSizeY * 2 round}
\renewcommand*{\LARGE}{\fontsize{\resultLARGEX}{\resultLARGEY}\selectfont}

\edef\fontSizeX{51.6}\edef\fontSizeY{64}
\FPupn{\resulthugeX}{myfontscale fontSizeX * 2 round}
\FPupn{\resulthugeY}{myfontscale fontSizeY * 2 round}
\renewcommand*{\huge}{\fontsize{\resulthugeX}{\resulthugeY}\selectfont}

\edef\fontSizeX{61.92}\edef\fontSizeY{77}
\FPupn{\resultHugeX}{myfontscale fontSizeX * 2 round}
\FPupn{\resultHugeY}{myfontscale fontSizeY * 2 round}
\renewcommand*{\Huge}{\fontsize{\resultHugeX}{\resultHugeY}\selectfont}

\edef\fontSizeX{74.3}\edef\fontSizeY{93}
\FPupn{\resultveryHugeX}{myfontscale fontSizeX * 2 round}
\FPupn{\resultveryHugeY}{myfontscale fontSizeY * 2 round}
\newcommand*{\veryHuge}{\fontsize{\resultveryHugeX}{\resultveryHugeY}\selectfont}

\edef\fontSizeX{89.16}\edef\fontSizeY{112}
\FPupn{\resultVeryHugeX}{myfontscale fontSizeX * 2 round}
\FPupn{\resultVeryHugeY}{myfontscale fontSizeY * 2 round}
\newcommand*{\VeryHuge}{\fontsize{\resultVeryHugeX}{\resultVeryHugeY}\selectfont}

\edef\fontSizeX{107}\edef\fontSizeY{134}
\FPupn{\resultVERYHugeX}{myfontscale fontSizeX * 2 round}
\FPupn{\resultVERYHugeY}{myfontscale fontSizeY * 2 round}
\newcommand*{\VERYHuge}{\fontsize{\resultVERYHugeX}{\resultVERYHugeY}\selectfont}

% set the normalfont (default)
\renewcommand*{\normalfont}{\normalsize}