File: picture.tex

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% Plain TeX interface to picture mode.
% David Carlisle

\input miniltx

\makeatletter
\let\@@line\line
\input autopict.sty
\let\LaTeX@line\line
\let\line\@@line


\newdimen\@wholewidth
\newdimen\@halfwidth
\newdimen\unitlength \unitlength =1pt
\newbox\@picbox
\newdimen\@picht
\newcount\@xarg
\newcount\@yarg
\newcount\@yyarg

\font\tenln  =line10   \font\tenlnw  =linew10\relax
\font\tencirc=lcircle10 \font\tencircw=lcirclew10\relax
\newcount\@multicnt
\newdimen\@xdim
\newdimen\@ydim
\newbox\@linechar
\newdimen\@linelen
\newdimen\@clnwd
\newdimen\@clnht
\newdimen\@dashdim
\newbox\@dashbox
\newcount\@dashcnt
\let\@linefnt\tenln
\let\@circlefnt\tencirc
\@wholewidth\fontdimen8\tenln
\@halfwidth .5\@wholewidth

\def\picture#1{%
  \begingroup
  \let\line\LaTeX@line
  \def\end##1{\csname end##1\endcsname}%
  \pictur@#1}

\let\@@endpicture\endpicture
\def\endpicture{\@@endpicture\endgroup}

\def\LaTeXbegin{\def\begin##1{\csname##1\endcsname}}


\resetatcatcode