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547 lines
22 KiB
TeX
547 lines
22 KiB
TeX
%%% ====================================================================
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%%% This file is freely redistributable and placed into the
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%%% public domain by Tomas Rokicki.
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%%% @TeX-file{
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%%% author = "Tom Rokicki",
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%%% version = "2.7k",
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%%% date = "19 July 1997",
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%%% time = "10:00:05 MDT",
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%%% filename = "epsf.tex",
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%%% address = "Tom Rokicki
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%%% Box 2081
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%%% Stanford, CA 94309
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%%% USA",
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%%% telephone = "+1 415 855 9989",
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%%% email = "rokicki@cs.stanford.edu (Internet)",
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%%% codetable = "ISO/ASCII",
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%%% keywords = "PostScript, TeX",
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%%% supported = "yes",
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%%% abstract = "This file contains macros to support the inclusion
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%%% of Encapsulated PostScript files in TeX documents.",
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%%% docstring = "This file contains TeX macros to include an
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%%% Encapsulated PostScript graphic. It works
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%%% by finding the bounding box comment,
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%%% calculating the correct scale values, and
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%%% inserting a vbox of the appropriate size at
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%%% the current position in the TeX document.
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%%%
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%%% To use, simply say
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%%%
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%%% \input epsf % somewhere early on in your TeX file
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%%%
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%%% % then where you want to insert a vbox for a figure:
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%%% \epsfbox{filename.ps}
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%%%
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%%% Alternatively, you can supply your own
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%%% bounding box by
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%%%
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%%% \epsfbox[0 0 30 50]{filename.ps}
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%%%
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%%% This will not read in the file, and will
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%%% instead use the bounding box you specify.
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%%%
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%%% The effect will be to typeset the figure as
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%%% a TeX box, at the point of your \epsfbox
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%%% command. By default, the graphic will have
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%%% its `natural' width (namely the width of
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%%% its bounding box, as described in
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%%% filename.ps). The TeX box will have depth
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%%% zero.
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%%%
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%%% You can enlarge or reduce the figure by
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%%% saying
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%%%
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%%% \epsfxsize=<dimen> \epsfbox{filename.ps}
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%%% or
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%%% \epsfysize=<dimen> \epsfbox{filename.ps}
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%%%
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%%% instead. Then the width of the TeX box will
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%%% be \epsfxsize and its height will be scaled
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%%% proportionately (or the height will be
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%%% \epsfysize and its width will be scaled
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%%% proportionately).
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%%%
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%%% The width (and height) is restored to zero
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%%% after each use, so \epsfxsize or \epsfysize
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%%% must be specified before EACH use of
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%%% \epsfbox.
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%%%
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%%% A more general facility for sizing is
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%%% available by defining the \epsfsize macro.
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%%% Normally you can redefine this macro to do
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%%% almost anything. The first parameter is
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%%% the natural x size of the PostScript
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%%% graphic, the second parameter is the
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%%% natural y size of the PostScript graphic.
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%%% It must return the xsize to use, or 0 if
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%%% natural scaling is to be used. Common uses
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%%% include:
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%%%
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%%% \epsfxsize % just leave the old value alone
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%%% 0pt % use the natural sizes
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%%% #1 % use the natural sizes
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%%% \hsize % scale to full width
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%%% 0.5#1 % scale to 50% of natural size
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%%% \ifnum #1>\hsize\hsize\else#1\fi
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%%% % smaller of natural, hsize
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%%%
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%%% If you want TeX to report the size of the
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%%% figure (as a message on your terminal when
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%%% it processes each figure), say
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%%% `\epsfverbosetrue'.
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%%%
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%%% If you only want to get the bounding box
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%%% extents, without producing any output boxes
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%%% or \special{}, then say
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%%% \epsfgetbb{filename}. The extents will be
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%%% saved in the macros \epsfllx \epsflly
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%%% \epsfurx \epsfury in PostScript units of
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%%% big points.
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%%%
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%%% Revision history:
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%%%
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%%% ---------------------------------------------
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%%% epsf.tex macro file:
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%%% Originally written by Tomas Rokicki of
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%%% Radical Eye Software, 29 Mar 1989.
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%%%
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%%% ---------------------------------------------
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%%% Revised by Don Knuth, 3 Jan 1990.
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%%%
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%%% ---------------------------------------------
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%%% Revised by Tomas Rokicki, 18 Jul 1990.
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%%% Accept bounding boxes with no space after
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%%% the colon.
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%%%
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%%% ---------------------------------------------
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%%% Revised by Nelson H. F. Beebe
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%%% <beebe@math.utah.edu>, 03 Dec 1991 [2.0].
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%%% Add version number and date typeout.
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%%%
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%%% Use \immediate\write16 instead of \message
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%%% to ensure output on new line.
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%%%
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%%% Handle nested EPS files.
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%%%
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%%% Handle %%BoundingBox: (atend) lines.
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%%%
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%%% Do not quit when blank lines are found.
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%%%
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%%% Add a few percents to remove generation of
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%%% spurious blank space.
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%%%
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%%% Move \special output to
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%%% \epsfspecial{filename} so that other macro
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%%% packages can input this one, then change
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%%% the definition of \epsfspecial to match
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%%% another DVI driver.
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%%%
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%%% Move size computation to \epsfsetsize which
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%%% can be called by the user; the verbose
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%%% output of the bounding box and scaled width
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%%% and height happens here.
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%%%
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%%% ---------------------------------------------
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%%% Revised by Nelson H. F. Beebe
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%%% <beebe@math.utah.edu>, 05 May 1992 [2.1].
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%%% Wrap \leavevmode\hbox{} around \vbox{} with
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%%% the \special so that \epsffile{} can be
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%%% used inside \begin{center}...\end{center}
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%%%
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%%% ---------------------------------------------
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%%% Revised by Nelson H. F. Beebe
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%%% <beebe@math.utah.edu>, 09 Dec 1992 [2.2].
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%%% Introduce \epsfshow{true,false} and
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%%% \epsfframe{true,false} macros; the latter
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%%% suppresses the insertion of the PostScript,
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%%% and instead just creates an empty box,
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%%% which may be handy for rapid prototyping.
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%%%
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%%% ---------------------------------------------
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%%% Revised by Nelson H. F. Beebe
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%%% <beebe@math.utah.edu>, 14 Dec 1992 [2.3].
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%%% Add \epsfshowfilename{true,false}. When
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%%% true, and \epsfshowfalse is specified, the
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%%% PostScript file name will be displayed
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%%% centered in the figure box.
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%%%
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%%% ---------------------------------------------
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%%% Revised by Nelson H. F. Beebe
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%%% <beebe@math.utah.edu>, 20 June 1993 [2.4].
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%%% Remove non-zero debug setting of \epsfframemargin,
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%%% and change margin handling to preserve EPS image
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%%% size and aspect ratio, so that the actual
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%%% box is \epsfxsize+\epsfframemargin wide by
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%%% \epsfysize+\epsfframemargin high.
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%%% Reduce output of \epsfshowfilenametrue to
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%%% just the bare file name.
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%%%
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%%% ---------------------------------------------
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%%% Revised by Nelson H. F. Beebe
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%%% <beebe@math.utah.edu>, 13 July 1993 [2.5].
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%%% Add \epsfframethickness for control of
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%%% \epsfframe frame lines.
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%%%
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%%% ---------------------------------------------
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%%% Revised by Nelson H. F. Beebe
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%%% <beebe@math.utah.edu>, 02 July 1996 [2.6]
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%%% Add missing initialization \epsfatendfalse;
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%%% the lack of this resulted in the wrong
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%%% BoundingBox being picked up, mea culpa, sigh...
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%%% ---------------------------------------------
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%%%
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%%% ---------------------------------------------
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%%% Revised by Nelson H. F. Beebe
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%%% <beebe@math.utah.edu>, 25 October 1996 [2.7]
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%%% Update to match changes in from dvips 5-600
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%%% distribution: new user-accessible macros:
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%%% \epsfclipon, \epsfclipoff, \epsfdrafton,
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%%% \epsfdraftoff, change \empty to \epsfempty.
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%%% ---------------------------------------------
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%%%
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%%% Modified to avoid verbosity, give help.
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%%% --kb@cs.umb.edu, for Texinfo.
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%%% }
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%%% ====================================================================
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%
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\ifx\epsfannounce\undefined \def\epsfannounce{\immediate\write16}\fi
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\epsfannounce{This is `epsf.tex' v2.7k <10 July 1997>}%
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%
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\newread\epsffilein % file to \read
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\newif\ifepsfatend % need to scan to LAST %%BoundingBox comment?
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\newif\ifepsfbbfound % success?
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\newif\ifepsfdraft % use draft mode?
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\newif\ifepsffileok % continue looking for the bounding box?
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\newif\ifepsfframe % frame the bounding box?
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\newif\ifepsfshow % show PostScript file, or just bounding box?
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\epsfshowtrue % default is to display PostScript file
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\newif\ifepsfshowfilename % show the file name if \epsfshowfalse specified?
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\newif\ifepsfverbose % report what you're making?
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\newdimen\epsfframemargin % margin between box and frame
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\newdimen\epsfframethickness % thickness of frame rules
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\newdimen\epsfrsize % vertical size before scaling
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\newdimen\epsftmp % register for arithmetic manipulation
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\newdimen\epsftsize % horizontal size before scaling
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\newdimen\epsfxsize % horizontal size after scaling
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\newdimen\epsfysize % vertical size after scaling
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\newdimen\pspoints % conversion factor
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%
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\pspoints = 1bp % Adobe points are `big'
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\epsfxsize = 0pt % default value, means `use natural size'
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\epsfysize = 0pt % ditto
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\epsfframemargin = 0pt % default value: frame box flush around picture
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\epsfframethickness = 0.4pt % TeX's default rule thickness
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%
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\def\epsfbox#1{\global\def\epsfllx{72}\global\def\epsflly{72}%
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\global\def\epsfurx{540}\global\def\epsfury{720}%
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\def\lbracket{[}\def\testit{#1}\ifx\testit\lbracket
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\let\next=\epsfgetlitbb\else\let\next=\epsfnormal\fi\next{#1}}%
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%
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% We use \epsfgetlitbb if the user specified an explicit bounding box,
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% and \epsfnormal otherwise. Because \epsfgetbb can be called
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% separately to retrieve the bounding box, we move the verbose
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% printing the bounding box extents and size on the terminal to
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% \epsfstatus. Therefore, when the user provided the bounding box,
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% \epsfgetbb will not be called, so we must call \epsfsetsize and
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% \epsfstatus ourselves.
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%
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\def\epsfgetlitbb#1#2 #3 #4 #5]#6{%
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\epsfgrab #2 #3 #4 #5 .\\%
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\epsfsetsize
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\epsfstatus{#6}%
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\epsfsetgraph{#6}%
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}%
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%
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\def\epsfnormal#1{%
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\epsfgetbb{#1}%
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\epsfsetgraph{#1}%
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}%
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%
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\newhelp\epsfnoopenhelp{The PostScript image file must be findable by
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TeX, i.e., somewhere in the TEXINPUTS (or equivalent) path.}%
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%
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\def\epsfgetbb#1{%
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%
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% The first thing we need to do is to open the
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% PostScript file, if possible.
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%
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\openin\epsffilein=#1
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\ifeof\epsffilein
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\errhelp = \epsfnoopenhelp
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\errmessage{Could not open file #1, ignoring it}%
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\else %process the file
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{% %start a group to contain catcode changes
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% Make all special characters, except space, to be of type
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% `other' so we process the file in almost verbatim mode
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% (TeXbook, p. 344).
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\chardef\other=12
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\def\do##1{\catcode`##1=\other}%
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\dospecials
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\catcode`\ =10
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\epsffileoktrue %true while we are looping
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\epsfatendfalse %[02-Jul-1996]: add forgotten initialization
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\loop %reading lines from the EPS file
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\read\epsffilein to \epsffileline
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\ifeof\epsffilein %then no more input
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\epsffileokfalse %so set completion flag
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\else %otherwise process one line
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\expandafter\epsfaux\epsffileline:. \\%
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\fi
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\ifepsffileok
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\repeat
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\ifepsfbbfound
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\else
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\ifepsfverbose
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\immediate\write16{No BoundingBox comment found in %
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file #1; using defaults}%
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\fi
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\fi
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}% %end catcode changes
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\closein\epsffilein
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\fi %end of file processing
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\epsfsetsize %compute size parameters
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\epsfstatus{#1}%
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}%
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%
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% Clipping control:
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\def\epsfclipon{\def\epsfclipstring{ clip}}%
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\def\epsfclipoff{\def\epsfclipstring{\ifepsfdraft\space clip\fi}}%
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\epsfclipoff % default for dvips is OFF
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%
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% The special that is emitted by \epsfsetgraph comes from this macro.
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% It is defined separately to allow easy customization by other
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% packages that first \input epsf.tex, then redefine \epsfspecial.
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% This macro is invoked in the lower-left corner of a box of the
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% width and height determined from the arguments to \epsffile, or
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% from the %%BoundingBox in the EPS file itself.
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%
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% This version is for dvips:
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\def\epsfspecial#1{%
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\epsftmp=10\epsfxsize
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\divide\epsftmp\pspoints
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\ifnum\epsfrsize=0\relax
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\special{PSfile=\ifepsfdraft psdraft.ps\else#1\fi\space
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llx=\epsfllx\space
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lly=\epsflly\space
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urx=\epsfurx\space
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ury=\epsfury\space
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rwi=\number\epsftmp
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\epsfclipstring
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}%
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\else
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\epsfrsize=10\epsfysize
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\divide\epsfrsize\pspoints
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\special{PSfile=\ifepsfdraft psdraft.ps\else#1\fi\space
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llx=\epsfllx\space
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lly=\epsflly\space
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urx=\epsfurx\space
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ury=\epsfury\space
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rwi=\number\epsftmp
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rhi=\number\epsfrsize
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\epsfclipstring
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}%
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\fi
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}%
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%
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% \epsfframe macro adapted from the TeXbook, exercise 21.3, p. 223, 331.
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% but modified to set the box width to the natural width, rather
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% than the line width, and to include space for margins and rules
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\def\epsfframe#1%
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{%
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\leavevmode % so we can put this inside
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% a centered environment
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\setbox0 = \hbox{#1}%
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\dimen0 = \wd0 % natural width of argument
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\advance \dimen0 by 2\epsfframemargin % plus width of 2 margins
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\advance \dimen0 by 2\epsfframethickness % plus width of 2 rule lines
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\vbox
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{%
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\hrule height \epsfframethickness depth 0pt
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\hbox to \dimen0
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{%
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\hss
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\vrule width \epsfframethickness
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\kern \epsfframemargin
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\vbox {\kern \epsfframemargin \box0 \kern \epsfframemargin }%
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\kern \epsfframemargin
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\vrule width \epsfframethickness
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\hss
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}% end hbox
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\hrule height 0pt depth \epsfframethickness
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}% end vbox
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}%
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%
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\def\epsfsetgraph#1%
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{%
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%
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% Make the vbox and stick in a \special that the DVI driver can
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% parse. \vfil and \hfil are used to place the \special origin at
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% the lower-left corner of the vbox. \epsfspecial can be redefined
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% to produce alternate \special syntaxes.
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%
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\leavevmode
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\hbox{% so we can put this in \begin{center}...\end{center}
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\ifepsfframe\expandafter\epsfframe\fi
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{\vbox to\epsfysize
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{%
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\ifepsfshow
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% output \special{} at lower-left corner of figure box
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\vfil
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\hbox to \epsfxsize{\epsfspecial{#1}\hfil}%
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\else
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\vfil
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\hbox to\epsfxsize{%
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\hss
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\ifepsfshowfilename
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{%
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\epsfframemargin=3pt % local change of margin
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\epsfframe{{\tt #1}}%
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}%
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\fi
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\hss
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}%
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\vfil
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\fi
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}%
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}}%
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%
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% Reset \epsfxsize and \epsfysize, as documented above.
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%
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\global\epsfxsize=0pt
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\global\epsfysize=0pt
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}%
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%
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% Now we have to calculate the scale and offset values to use.
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% First we compute the natural sizes.
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%
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\def\epsfsetsize
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{%
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\epsfrsize=\epsfury\pspoints
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\advance\epsfrsize by-\epsflly\pspoints
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\epsftsize=\epsfurx\pspoints
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\advance\epsftsize by-\epsfllx\pspoints
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%
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% If `epsfxsize' is 0, we default to the natural size of the picture.
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% Otherwise we scale the graph to be \epsfxsize wide.
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%
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\epsfxsize=\epsfsize{\epsftsize}{\epsfrsize}%
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\ifnum \epsfxsize=0
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\ifnum \epsfysize=0
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\epsfxsize=\epsftsize
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\epsfysize=\epsfrsize
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\epsfrsize=0pt
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%
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% We have a sticky problem here: TeX doesn't do floating point arithmetic!
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% Our goal is to compute y = rx/t. The following loop does this reasonably
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% fast, with an error of at most about 16 sp (about 1/4000 pt).
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%
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\else
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\epsftmp=\epsftsize \divide\epsftmp\epsfrsize
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\epsfxsize=\epsfysize \multiply\epsfxsize\epsftmp
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\multiply\epsftmp\epsfrsize \advance\epsftsize-\epsftmp
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\epsftmp=\epsfysize
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\loop \advance\epsftsize\epsftsize \divide\epsftmp 2
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\ifnum \epsftmp>0
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\ifnum \epsftsize<\epsfrsize
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\else
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\advance\epsftsize-\epsfrsize \advance\epsfxsize\epsftmp
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\fi
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\repeat
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\epsfrsize=0pt
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\fi
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\else
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\ifnum \epsfysize=0
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\epsftmp=\epsfrsize \divide\epsftmp\epsftsize
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\epsfysize=\epsfxsize \multiply\epsfysize\epsftmp
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\multiply\epsftmp\epsftsize \advance\epsfrsize-\epsftmp
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\epsftmp=\epsfxsize
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\loop \advance\epsfrsize\epsfrsize \divide\epsftmp 2
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\ifnum \epsftmp>0
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\ifnum \epsfrsize<\epsftsize
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\else
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\advance\epsfrsize-\epsftsize \advance\epsfysize\epsftmp
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\fi
|
|
\repeat
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|
\epsfrsize=0pt
|
|
\else
|
|
\epsfrsize=\epsfysize
|
|
\fi
|
|
\fi
|
|
}%
|
|
%
|
|
% Issue some status messages if the user requested them
|
|
%
|
|
\def\epsfstatus#1{% arg = filename
|
|
\ifepsfverbose
|
|
\immediate\write16{#1: BoundingBox:
|
|
llx = \epsfllx\space lly = \epsflly\space
|
|
urx = \epsfurx\space ury = \epsfury\space}%
|
|
\immediate\write16{#1: scaled width = \the\epsfxsize\space
|
|
scaled height = \the\epsfysize}%
|
|
\fi
|
|
}%
|
|
%
|
|
% We still need to define the tricky \epsfaux macro. This requires
|
|
% a couple of magic constants for comparison purposes.
|
|
%
|
|
{\catcode`\%=12 \global\let\epsfpercent=%\global\def\epsfbblit{%BoundingBox}}%
|
|
\global\def\epsfatend{(atend)}%
|
|
%
|
|
% So we're ready to check for `%BoundingBox:' and to grab the
|
|
% values if they are found.
|
|
%
|
|
% If we find a line
|
|
%
|
|
% %%BoundingBox: (atend)
|
|
%
|
|
% then we ignore it, but set a flag to force parsing all of the
|
|
% file, so the last %%BoundingBox parsed will be the one used. This
|
|
% is necessary, because EPS files can themselves contain other EPS
|
|
% files with their own %%BoundingBox comments.
|
|
%
|
|
% If we find a line
|
|
%
|
|
% %%BoundingBox: llx lly urx ury
|
|
%
|
|
% then we save the 4 values in \epsfllx, \epsflly, \epsfurx, \epsfury.
|
|
% Then, if we have not previously parsed an (atend), we flag completion
|
|
% and can stop reading the file. Otherwise, we must keep on reading
|
|
% to end of file so that we find the values on the LAST %%BoundingBox.
|
|
\long\def\epsfaux#1#2:#3\\%
|
|
{%
|
|
\def\testit{#2}% % save second character up to just before colon
|
|
\ifx#1\epsfpercent % then first char is percent (quick test)
|
|
\ifx\testit\epsfbblit % then (slow test) we have %%BoundingBox
|
|
\epsfgrab #3 . . . \\%
|
|
\ifx\epsfllx\epsfatend % then ignore %%BoundingBox: (atend)
|
|
\global\epsfatendtrue
|
|
\else % else found %%BoundingBox: llx lly urx ury
|
|
\ifepsfatend % then keep parsing ALL %%BoundingBox lines
|
|
\else % else stop after first one parsed
|
|
\epsffileokfalse
|
|
\fi
|
|
\global\epsfbbfoundtrue
|
|
\fi
|
|
\fi
|
|
\fi
|
|
}%
|
|
%
|
|
% Here we grab the values and stuff them in the appropriate definitions.
|
|
%
|
|
\def\epsfempty{}%
|
|
\def\epsfgrab #1 #2 #3 #4 #5\\{%
|
|
\global\def\epsfllx{#1}\ifx\epsfllx\epsfempty
|
|
\epsfgrab #2 #3 #4 #5 .\\\else
|
|
\global\def\epsflly{#2}%
|
|
\global\def\epsfurx{#3}\global\def\epsfury{#4}\fi
|
|
}%
|
|
%
|
|
% We default the epsfsize macro.
|
|
%
|
|
\def\epsfsize#1#2{\epsfxsize}%
|
|
%
|
|
% Finally, another definition for compatibility with older macros.
|
|
%
|
|
\let\epsffile=\epsfbox
|
|
\endinput
|