full_page_pdf.tex

% Use the preview package to generate "full-page" images, i.e. crop to the
% relevant parts of the figure

\documentclass{article}
\usepackage[pdftex,active,tightpage]{preview}
%\setlength\PreviewBorder{2mm} % use to add a border around the image
\usepackage{tikz}
\begin{document}
\begin{preview}
% Put everything you want inbetween \begin{preview} and \end{preview} or use
% \PreviewEnvironment{tikzpicture} in the preamble to only have the TikZ-
% picture in the output
\begin{tikzpicture}
  \shade (0,0) circle(2);	% background
  \draw (0,0) circle(2); 	% rim
  \draw (.75,1) circle(.5);	% right eye
  \fill (.66,.9) circle(.25);	% right pupil
  \draw (-.75,1) circle(.5);	% left eye
  \fill (-.66,.9) circle(.25);% left pupil
  \fill (.2,0) circle (.1);	% right nostril
  \fill (-.2,0) circle (.1);	% left nostril
  \draw (-135:1) arc (-135:-45:1) -- cycle; % mouth
  \end{tikzpicture}
\end{preview}
\end{document}