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-% Copyright 2006 by Till Tantau
-%
-% This file may be distributed and/or modified
-%
-% 1. under the LaTeX Project Public License and/or
-% 2. under the GNU Public License.
-%
-% See the file doc/generic/pgf/licenses/LICENSE for more details.
-
-\ProvidesFileRCS $Header: /cvsroot/pgf/pgf/generic/pgf/systemlayer/pgfsys-dvi.def,v 1.5 2007/06/07 07:41:11 tantau Exp $
-
-% Driver commands for pure, ultra-portable dvi, in the tradition of
-% old-style LaTeX pictures.
-%
-% Do not expect magic from this file
-
-
-\newtoks\pgf@sys@dvi@path
-\def\pgf@sys@dvi@addtopath#1{\pgf@sys@dvi@path\expandafter{\the\pgf@sys@dvi@path#1}}
-
-% Placing an object:
-\def\pgf@sys@dvi@put#1#2#3{%
- {%
- \setbox\pgf@hbox=\hbox{\raise#2\hbox to0pt{\kern#1\relax#3\hss}}%
- \wd\pgf@hbox=0pt%
- \ht\pgf@hbox=0pt%
- \dp\pgf@hbox=0pt%
- \box\pgf@hbox%
- }%
-}
-
-\def\pgf@sys@dvi@drawrect#1#2#3#4{%
- {%
- \pgf@x=#1%
- \pgf@y=#2%
- \pgf@xa=#3%
- \pgf@ya=#4%
- \ifdim\pgf@xa<0pt%
- \advance\pgf@x by\pgf@xa%
- \pgf@xa=-\pgf@xa%
- \fi%
- \ifdim\pgf@ya<0pt%
- \advance\pgf@y by\pgf@ya%
- \pgf@ya=-\pgf@ya%
- \fi%
- \pgf@sys@dvi@put{\pgf@x}{\pgf@y}{\vrule width\pgf@xa height\pgf@ya}%
- }%
-}
-
-\def\pgf@sys@dvi@bezier{%
- {%
- % First iteration:
- \pgf@x=\pgf@time@t\pgf@x\advance\pgf@x by\pgf@time@s\pgf@xa%
- \pgf@y=\pgf@time@t\pgf@y\advance\pgf@y by\pgf@time@s\pgf@ya%
- \pgf@xa=\pgf@time@t\pgf@xa\advance\pgf@xa by\pgf@time@s\pgf@xb%
- \pgf@ya=\pgf@time@t\pgf@ya\advance\pgf@ya by\pgf@time@s\pgf@yb%
- \pgf@xb=\pgf@time@t\pgf@xb\advance\pgf@xb by\pgf@time@s\pgf@xc%
- \pgf@yb=\pgf@time@t\pgf@yb\advance\pgf@yb by\pgf@time@s\pgf@yc%
- % Second iteration:
- \pgf@x=\pgf@time@t\pgf@x\advance\pgf@x by\pgf@time@s\pgf@xa%
- \pgf@y=\pgf@time@t\pgf@y\advance\pgf@y by\pgf@time@s\pgf@ya%
- \pgf@xa=\pgf@time@t\pgf@xa\advance\pgf@xa by\pgf@time@s\pgf@xb%
- \pgf@ya=\pgf@time@t\pgf@ya\advance\pgf@ya by\pgf@time@s\pgf@yb%
- % Third iteration:
- \pgf@x=\pgf@time@t\pgf@x\advance\pgf@x by\pgf@time@s\pgf@xa%
- \pgf@y=\pgf@time@t\pgf@y\advance\pgf@y by\pgf@time@s\pgf@ya%
- %
- \advance\pgf@x by-.5\pgf@sys@dvi@linewidth%
- \advance\pgf@y by-.5\pgf@sys@dvi@linewidth%
- \pgf@sys@dvi@drawrect{\pgf@x}{\pgf@y}{\pgf@sys@dvi@linewidth}{\pgf@sys@dvi@linewidth}%
- }%
-}
-
-\def\pgf@sys@dvi@drawcurve#1#2#3#4#5#6#7#8{%
- {%
- \pgf@x=#1%
- \pgf@y=#2%
- \pgf@xa=#3%
- \pgf@ya=#4%
- \pgf@xb=#5%
- \pgf@yb=#6%
- \pgf@xc=#7%
- \pgf@yc=#8%
- % Compute number of steps:
- \pgfutil@tempdima=\pgf@x%
- \advance\pgfutil@tempdima by-\pgf@xa%
- \ifdim\pgfutil@tempdima<0pt%
- \pgfutil@tempdimb=-\pgfutil@tempdima%
- \else%
- \pgfutil@tempdimb=\pgfutil@tempdima%
- \fi%
- \pgfutil@tempdima=\pgf@y%
- \advance\pgfutil@tempdima by-\pgf@ya%
- \ifdim\pgfutil@tempdima<0pt%
- \pgfutil@tempdima=-\pgfutil@tempdima%
- \fi%
- \ifdim\pgfutil@tempdima>\pgfutil@tempdimb%
- \pgfutil@tempdimb=\pgfutil@tempdima%
- \fi%
- \pgfutil@tempdima=\pgf@xb%
- \advance\pgfutil@tempdima by-\pgf@xc%
- \ifdim\pgfutil@tempdima<0pt%
- \pgfutil@tempdima=-\pgfutil@tempdima%
- \fi%
- \ifdim\pgfutil@tempdima>\pgfutil@tempdimb%
- \pgfutil@tempdimb=\pgfutil@tempdima%
- \fi%
- \pgfutil@tempdima=\pgf@yb%
- \advance\pgfutil@tempdima by-\pgf@yc%
- \ifdim\pgfutil@tempdima<0pt%
- \pgfutil@tempdima=-\pgfutil@tempdima%
- \fi%
- \ifdim\pgfutil@tempdima>\pgfutil@tempdimb%
- \pgfutil@tempdimb=\pgfutil@tempdima%
- \fi%
- \pgfutil@tempdima=\pgf@x%
- \advance\pgfutil@tempdima by-\pgf@xc%
- \ifdim\pgfutil@tempdima<0pt%
- \pgfutil@tempdima=-\pgfutil@tempdima%
- \fi%
- \ifdim\pgfutil@tempdima>\pgfutil@tempdimb%
- \pgfutil@tempdimb=\pgfutil@tempdima%
- \fi%
- \pgfutil@tempdima=\pgf@y%
- \advance\pgfutil@tempdima by-\pgf@yc%
- \ifdim\pgfutil@tempdima<0pt%
- \pgfutil@tempdima=-\pgfutil@tempdima%
- \fi%
- \ifdim\pgfutil@tempdima>\pgfutil@tempdimb%
- \pgfutil@tempdimb=\pgfutil@tempdima%
- \fi%
- \pgfutil@tempcnta=\pgfutil@tempdimb%
- \ifdim\pgf@sys@dvi@linewidth>0.3pt%
- \pgfutil@tempdimb=0.15pt%
- \else%
- \ifdim\pgf@sys@dvi@linewidth<0.05pt%
- \pgfutil@tempdimb=.025pt%
- \else%
- \pgfutil@tempdimb=.5\pgf@sys@dvi@linewidth%
- \fi%
- \fi%
- \pgfutil@tempcntb=\pgfutil@tempdimb%
- \divide\pgfutil@tempcnta by\pgfutil@tempcntb\relax%
- \ifnum\pgfutil@tempcnta>0\relax%
- \pgfutil@tempcntb=0\relax%
- \loop%
- {%
- \pgfutil@tempdima=\the\pgfutil@tempcntb pt%
- \pgfutil@tempdimb=\the\pgfutil@tempcnta pt%
- \advance\pgfutil@tempdimb by-\pgfutil@tempdima\relax%
- \divide\pgfutil@tempdima by\pgfutil@tempcnta\relax%
- \divide\pgfutil@tempdimb by\pgfutil@tempcnta\relax%
- \edef\pgf@time@t{\pgf@sys@tonumber{\pgfutil@tempdima}}%
- \edef\pgf@time@s{\pgf@sys@tonumber{\pgfutil@tempdimb}}%
- \pgf@sys@dvi@bezier%
- }%
- \advance\pgfutil@tempcntb by1\relax
- \ifnum\pgfutil@tempcntb<\pgfutil@tempcnta%
- {\def\pgf@time@t{1}\def\pgf@time@s{0}\pgf@sys@dvi@bezier}%
- \repeat%
- \fi%
- }%
-}
-
-% Text:
-\def\pgfsys@hbox#1{%
- \wd#1=0pt%
- \ht#1=0pt%
- \dp#1=0pt%
- \pgf@sys@dvi@put{\pgf@sys@dvi@pt@x}{\pgf@sys@dvi@pt@y}{\box#1}%
-}
-
-
-
-% Literals:
-
-\def\pgfsys@invoke#1{#1}
-
-
-% Buffered path construction:
-
-\def\pgfsys@moveto#1#2{\pgfsysprotocol@literal{\noexpand\pgf@sys@dvi@addtopath{\noexpand\pgf@sys@dvi@moveto{#1}{#2}}}}
-\def\pgfsys@lineto#1#2{\pgfsysprotocol@literal{\noexpand\pgf@sys@dvi@addtopath{\noexpand\pgf@sys@dvi@lineto{#1}{#2}}}}
-\def\pgfsys@curveto#1#2#3#4#5#6{\pgfsysprotocol@literal{\noexpand\pgf@sys@dvi@addtopath{\noexpand\pgf@sys@dvi@curveto{#1}{#2}{#3}{#4}{#5}{#6}}}}
-\def\pgfsys@rect#1#2#3#4{\pgfsysprotocol@literal{\noexpand\pgf@sys@dvi@addtopath{\noexpand\pgf@sys@dvi@rect{#1}{#2}{#3}{#4}}}}
-\def\pgfsys@closepath{\pgfsysprotocol@literal{\noexpand\pgf@sys@dvi@addtopath{\noexpand\pgf@sys@dvi@closepath}}}
-
-
-% Scoping
-\def\pgfsys@beginscope{\pgfsysprotocol@literal{\noexpand\pgf@sys@dvi@beginscope}}%
-\def\pgfsys@endscope{\pgfsysprotocol@literal{\noexpand\pgf@sys@dvi@endscope}}%
-
-\def\pgf@sys@dvi@beginscope{%
- % Save current stuff...
- \edef\pgf@sys@dvi@return{%
- \global\pgf@sys@dvi@linewidth=\the\pgf@sys@dvi@linewidth%
- \global\pgf@sys@dvi@pt@x=\the\pgf@sys@dvi@pt@x%
- \global\pgf@sys@dvi@pt@y=\the\pgf@sys@dvi@pt@y%
- \gdef\noexpand\pgf@sys@dvi@pt@aa{\pgf@sys@dvi@pt@aa}%
- \gdef\noexpand\pgf@sys@dvi@pt@ab{\pgf@sys@dvi@pt@ab}%
- \gdef\noexpand\pgf@sys@dvi@pt@ba{\pgf@sys@dvi@pt@ba}%
- \gdef\noexpand\pgf@sys@dvi@pt@bb{\pgf@sys@dvi@pt@bb}%
- }%
- \begingroup%
- \ignorespaces%
-}
-
-\def\pgf@sys@dvi@endscope{%
- \endgroup%
- \pgf@sys@dvi@return%
-}
-
-
-
-% Line width
-
-\newdimen\pgf@sys@dvi@linewidth
-\pgf@sys@dvi@linewidth=0.4pt
-
-\def\pgfsys@setlinewidth#1{\global\pgf@sys@dvi@linewidth=#1\relax}
-
-
-% Transformation matrix
-
-\newdimen\pgf@sys@dvi@pt@x
-\newdimen\pgf@sys@dvi@pt@y
-
-\def\pgf@sys@dvi@pt@aa{1.0} \def\pgf@sys@dvi@pt@ab{0.0}
-\def\pgf@sys@dvi@pt@ba{0.0} \def\pgf@sys@dvi@pt@bb{1.0}
-
-\def\pgf@sys@dvi@pos@transform#1#2{%
- \pgf@pt@temp=#1%
- #1=\pgf@sys@dvi@pt@aa#1%
- \advance#1 by\pgf@sys@dvi@pt@ba#2%
- #2=\pgf@sys@dvi@pt@bb#2%
- \advance#2 by\pgf@sys@dvi@pt@ab\pgf@pt@temp%
- \advance#1 by\pgf@sys@dvi@pt@x%
- \advance#2 by\pgf@sys@dvi@pt@y%
-}
-
-\def\pgf@sys@dvi@transformcm#1#2#3#4#5#6{%
- {%
- \pgf@xc=#5%
- \pgf@yc=#6%
- %
- \pgf@x=#1pt%
- \pgf@y=#2pt%
- %
- \pgf@xa=\pgf@sys@dvi@pt@aa\pgf@x%
- \advance\pgf@xa by \pgf@sys@dvi@pt@ba\pgf@y%
- %
- \pgf@ya=\pgf@sys@dvi@pt@ab\pgf@x%
- \advance\pgf@ya by \pgf@sys@dvi@pt@bb\pgf@y%
- %
- \pgf@x=#3pt%
- \pgf@y=#4pt%
- %
- \pgf@xb=\pgf@sys@dvi@pt@aa\pgf@x%
- \advance\pgf@xb by \pgf@sys@dvi@pt@ba\pgf@y%
- %
- \pgf@yb=\pgf@sys@dvi@pt@ab\pgf@x%
- \advance\pgf@yb by \pgf@sys@dvi@pt@bb\pgf@y%
- %
- \pgf@x=\pgf@sys@dvi@pt@aa\pgf@xc%
- \advance\pgf@x by\pgf@sys@dvi@pt@ba\pgf@yc%
- \advance\pgf@x by\pgf@sys@dvi@pt@x%
- %
- \pgf@y=\pgf@sys@dvi@pt@ab\pgf@xc%
- \advance\pgf@y by\pgf@sys@dvi@pt@bb\pgf@yc%
- \advance\pgf@y by\pgf@sys@dvi@pt@y%
- %
- \global\pgf@sys@dvi@pt@x=\pgf@x%
- \global\pgf@sys@dvi@pt@y=\pgf@y%
- \xdef\pgf@sys@dvi@pt@aa{\pgf@sys@tonumber{\pgf@xa}}%
- \xdef\pgf@sys@dvi@pt@ab{\pgf@sys@tonumber{\pgf@ya}}%
- \xdef\pgf@sys@dvi@pt@ba{\pgf@sys@tonumber{\pgf@xb}}%
- \xdef\pgf@sys@dvi@pt@bb{\pgf@sys@tonumber{\pgf@yb}}%
- }%
-}
-
-\def\pgfsys@transformcm#1#2#3#4#5#6{%
- {%
- \pgf@x=#5\relax%
- \pgf@y=#6\relax%
- \pgfsysprotocol@literal{\noexpand\pgf@sys@dvi@transformcm{#1}{#2}{#3}{#4}{\the\pgf@x}{\the\pgf@y}}%
- }%
-}
-
-
-% Stroking
-
-\def\pgfsys@stroke{\pgfsysprotocol@literal{\noexpand\pgf@sys@dvi@stroke}}%
-
-
-\def\pgf@sys@dvi@stroke{%
- \let\pgf@sys@dvi@moveto=\pgf@sys@dvi@moveto@stroke%
- \let\pgf@sys@dvi@lineto=\pgf@sys@dvi@lineto@stroke%
- \let\pgf@sys@dvi@curveto=\pgf@sys@dvi@curveto@stroke%
- \let\pgf@sys@dvi@rect=\pgf@sys@dvi@rect@stroke%
- \let\pgf@sys@dvi@closepath=\pgf@sys@dvi@closepath@stroke%
- {\the\pgf@sys@dvi@path}%
- \pgf@sys@dvi@path{}%
-}
-
-\def\pgf@sys@dvi@moveto@stroke#1#2{%
- % These two store the current position:
- \pgf@xc=#1\relax%
- \pgf@yc=#2\relax%
- % These two store the last moveto:
- \pgf@xb=\pgf@xc%
- \pgf@yb=\pgf@yc%
-}
-
-\def\pgf@sys@dvi@lineto@stroke#1#2{%
- {%
- \pgf@xa=#1\relax%
- \pgf@ya=#2\relax%
- \pgf@x=\pgf@xc%
- \pgf@y=\pgf@yc%
- \pgf@sys@dvi@pos@transform{\pgf@xa}{\pgf@ya}%
- \pgf@sys@dvi@pos@transform{\pgf@x}{\pgf@y}%
- % Now, we need to draw a line from (x/y) to (xa/ya)
- %
- % Horizontal?
- \ifdim\pgf@y=\pgf@ya%
- % Ok, that should be easy...
- \pgf@xb=\pgf@xa%
- \advance\pgf@xb by-\pgf@x%
- \advance\pgf@y by-0.5\pgf@sys@dvi@linewidth%
- \pgf@sys@dvi@drawrect{\pgf@x}{\pgf@y}{\pgf@xb}{\pgf@sys@dvi@linewidth}%
- \else%
- \ifdim\pgf@x=\pgf@xa%
- % Ok, also easy...
- \pgf@yb=\pgf@ya%
- \advance\pgf@yb by-\pgf@y%
- \advance\pgf@x by-0.5\pgf@sys@dvi@linewidth%
- \pgf@sys@dvi@drawrect{\pgf@x}{\pgf@y}{\pgf@sys@dvi@linewidth}{\pgf@yb}%
- \else%
- \edef\pgf@marshal{\noexpand\pgf@sys@dvi@drawcurve{\the\pgf@x}{\the\pgf@y}{\the\pgf@x}{\the\pgf@y}{\the\pgf@xa}{\the\pgf@ya}{\the\pgf@xa}{\the\pgf@ya}}%
- \pgf@marshal%
- \fi%
- \fi%
- }%
- % Remember:
- \pgf@xc=#1\relax%
- \pgf@yc=#2\relax%
-}
-
-
-\def\pgf@sys@dvi@curveto@stroke#1#2#3#4#5#6{%
- \pgf@x=\pgf@xc%
- \pgf@y=\pgf@yc%
- \pgf@xa=#1%
- \pgf@ya=#2%
- \pgf@xb=#3%
- \pgf@yb=#4%
- \pgf@xc=#5%
- \pgf@yc=#6%
- {%
- \pgf@sys@dvi@pos@transform{\pgf@x}{\pgf@y}%
- \pgf@sys@dvi@pos@transform{\pgf@xa}{\pgf@ya}%
- \pgf@sys@dvi@pos@transform{\pgf@xb}{\pgf@yb}%
- \pgf@sys@dvi@pos@transform{\pgf@xc}{\pgf@yc}%
- \pgf@sys@dvi@drawcurve{\pgf@x}{\pgf@y}{\pgf@xa}{\pgf@ya}{\pgf@xb}{\pgf@yb}{\pgf@xc}{\pgf@yc}%
- }%
-}
-
-\def\pgf@sys@dvi@closepath@stroke{%
- \pgf@sys@dvi@lineto@stroke{\pgf@xc}{\pgf@yc}%
-}
-
-\def\pgf@sys@dvi@rect@stroke#1#2#3#4{%
- \pgf@x=#1\relax%
- \pgf@y=#2\relax%
- \pgf@xa=#3\relax%
- \pgf@ya=#4\relax%
- \advance\pgf@xa by\pgf@x%
- \advance\pgf@ya by\pgf@y%
- \pgf@sys@dvi@moveto@stroke{\pgf@x}{\pgf@y}%
- \pgf@sys@dvi@lineto@stroke{\pgf@xa}{\pgf@y}%
- \pgf@sys@dvi@lineto@stroke{\pgf@xa}{\pgf@ya}%
- \pgf@sys@dvi@lineto@stroke{\pgf@x}{\pgf@ya}%
- \pgf@sys@dvi@closepath@stroke%
-}
-
-
-
-\endinput
-
-%%% Local Variables:
-%%% mode: latex
-%%% End: