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\newblock Addison Wesley, 1985.

\bibitem{budig}
Simon Budig.
\newblock The linux-pinguin again.
\newblock \url{http://www.home.unix-ag.org/simon/penguin}.

\bibitem{ewing}
Larry Ewing.
\newblock Linux 2.0 penguins.
\newblock \url{http://www.isc.tamu.edu/~lewing/linux}.

\bibitem{ramshaw83}
Leo Guibas, Lyle Ramshaw, and Jorge Stolfi.
\newblock A kinetic framework for computational geometry.
\newblock In {\em Proceedings of the IEEE 1983 24th Annual Symposium on the
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\bibitem{pdf14}
Adobe~Systems Incorporated, editor.
\newblock {\em PDF Reference: Version 1.4}.
\newblock Addison-Wesley, 3rd edition, 2001.

\bibitem{gimp}
Peter Mattis, Spencer Kimball, and the GIMP~developers.
\newblock The {GIMP}: The {GNU} image manipulation program.
\newblock \url{http://www.gimp.org}.

\bibitem{render:2001}
Keith Packard.
\newblock {Design and Implementation of the X Rendering Extension}.
\newblock In {\em FREENIX Track, 2001 Usenix Annual Technical Conference},
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\bibitem{fontconfig}
Keith Packard.
\newblock {Font Configuration and Customization for Open Source Systems}.
\newblock In {\em 2002 Gnome User's and Developers European Conference},
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\bibitem{porterduff:1984}
Thomas Porter and Tom Duff.
\newblock {Compositing Digital Images}.
\newblock {\em Computer Graphics}, 18(3):253--259, July 1984.

\bibitem{x}
Robert~W. Scheifler and James Gettys.
\newblock {\em X Window System}.
\newblock Digital Press, third edition, 1992.

\bibitem{seckel}
Al~Seckel.
\newblock {\em The Great Book of Optical Illusions}.
\newblock Firefly Books Ltd., 2002.

\bibitem{gl:1.2.1}
Mark Segal, Kurt Akeley, and Jon~Leach (ed).
\newblock {\em The OpenGL Graphics System: A Specification}.
\newblock SGI, 1999.

\bibitem{freetype2}
David Turner and The FreeType~Development Team.
\newblock The design of {FreeType} 2, 2000.
\newblock \url{http://www.freetype.org/freetype2/docs/design/}.

\bibitem{watanabe}
Isao Watanabe.
\newblock 3-d shape and outline.
\newblock
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