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645 lines
26 KiB
TeX
645 lines
26 KiB
TeX
%%% -*-TeX-*-
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%%% ====================================================================
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%%% @TeX-file{
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%%% author = "Tom Rokicki",
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%%% version = "2.7.3",
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%%% date = "23 July 2005",
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%%% time = "14:32:01 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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%%% checksum = "20914 644 3054 26594",
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%%% email = "rokicki@cs.stanford.edu (Internet)",
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%%% codetable = "ISO/ASCII",
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%%% copyright = "This file is freely redistributable and
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%%% placed into the public domain by Tomas
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%%% Rokicki.",
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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
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%%% inclusion of Encapsulated PostScript files
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%%% 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 use
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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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%%% using
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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), use
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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 use \epsfgetbb{filename}.
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%%% The bounding box corner coordinates are saved
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%%% in the macros \epsfllx, \epsflly, \epsfurx,
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%%% and \epsfury in PostScript units of big
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%%% 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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%%% 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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%%% Revised by Nelson H. F. Beebe
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%%% <beebe@math.utah.edu>, 18 May 2002 [2.7.1]
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%%% Add write statements to echo input file
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%%% names. Prior to that change, an error in
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%%% such a file could be quite hard to track
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%%% down: a long list of TeX page numbers could
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%%% suddenly be followed by ``TeX buffer
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%%% capacity'' exceeded, without any indication
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%%% of the file that was responsible.
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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>, 16 May 2003 [2.7.2]
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%%% Supply two critical percent characters that
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%%% were mistakenly omitted in version 2.7.1,
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%%% and resulted in a small amount of spurious
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%%% horizontal space.
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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>, Karl Berry
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%%% <karl@freefriends.org>, and Robin Fairbairns
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%%% <Robin.Fairbairns@cl.cam.ac.uk>,
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%%% 23 July 2005 [2.7.3]
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%%% Add critical \hbox{} wrapper in \epsfsetgraph
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%%% so that \epsfbox{} does not conflict with
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%%% LaTeX center environment when \epsfbox{} is
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%%% surrounded by other horizonal objects.
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%%% Improve macro readability by adding legal,
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%%% but invisible-in-typeset-output, spaces.
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%%% Ensure that verbose status reports come
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%%% inside (filename ...) list.
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%%%
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%%% ---------------------------------------------
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%%% The checksum field above contains a CRC-16
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%%% checksum as the first value, followed by
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%%% the equivalent of the standard UNIX wc
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%%% (word count) utility output of lines,
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%%% words, and characters. This is produced by
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%%% Robert Solovay's checksum utility.",
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%%% }
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%%% ====================================================================
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%\immediate \write16 {This is `epsf.tex' v2.0 <02 Dec 1991>}%
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%\immediate \write16 {This is `epsf.tex' v2.1 <05 May 1992>}%
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%\immediate \write16 {This is `epsf.tex' v2.2 <09 Dec 1992>}%
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%\immediate \write16 {This is `epsf.tex' v2.3 <14 Dec 1992>}%
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%\immediate \write16 {This is `epsf.tex' v2.4 <20 June 1993>}%
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%\immediate \write16 {This is `epsf.tex' v2.5 <13 July 1993>}%
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%\immediate \write16 {This is `epsf.tex' v2.6 <02 July 1996>}%
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%\immediate \write16 {This is `epsf.tex' v2.7 <25 October 1996>}%
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%\immediate \write16 {This is `epsf.tex' v2.7.1 <18 May 2002>}%
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%\immediate \write16 {This is `epsf.tex' v2.7.2 <16 May 2003>}%
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\immediate \write16 {This is `epsf.tex' v2.7.3 <23 July 2005>}%
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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{%
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\global \def \epsfllx {72}%
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\global \def \epsflly {72}%
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\global \def \epsfurx {540}%
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\global \def \epsfury {720}%
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\def \lbracket {[}%
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\def \testit {#1}%
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\ifx \testit \lbracket
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\let \next = \epsfgetlitbb
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\else
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\let \next = \epsfnormal
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\fi
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\next{#1}%
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}%
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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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\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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\immediate \write16 {(#1}%
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\ifeof \epsffilein
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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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\immediate \write16 {)}%
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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 by \pspoints
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\ifnum \epsfrsize = 0%
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\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 by \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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% method for detecting latex suggested by Robin Fairbairns, May 2005.
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\ifx \documentstyle \epsfundefined
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\relax
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\else
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% \leavevmode % so we can put this inside
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% a latex centered environment
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% The \leavevmode breaks under plain when this is inside a box,
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% because it forces the figure to be the entire \hsize. On the
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% other hand, we need the \leavevmode for it to work in LaTeX,
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% because the {center} environment works by adjusting TeX's
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% paragraph parameters.
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%
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% Compare the LaTeX sequence
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% \begin{center}
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% \epsfbox{tip.eps}q
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% \end{center}
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% (needs the \leavevmode to put the q right next to the image)
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%
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% with the plain TeX sequence:
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% \leftline{\vbox{\epsfbox{tip.eps}}q}
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% (had the q all the way over to the right, when \leavevmode was used)
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\fi
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%
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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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\relax
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\hbox{%
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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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}% end hbox
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\relax
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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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\ifvmode \leavevmode \fi
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\relax
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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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|
\relax
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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
|
|
\epsftsize = \epsfurx \pspoints
|
|
\advance \epsftsize by -\epsfllx \pspoints
|
|
%
|
|
% If `epsfxsize' is 0, we default to the natural size of the picture.
|
|
% Otherwise we scale the graph to be \epsfxsize wide.
|
|
%
|
|
\epsfxsize = \epsfsize{\epsftsize}{\epsfrsize}%
|
|
\ifnum \epsfxsize = 0
|
|
\ifnum \epsfysize = 0
|
|
\epsfxsize = \epsftsize
|
|
\epsfysize = \epsfrsize
|
|
\epsfrsize = 0pt
|
|
%
|
|
% We have a sticky problem here: TeX doesn't do floating point arithmetic!
|
|
% Our goal is to compute y = rx/t. The following loop does this reasonably
|
|
% fast, with an error of at most about 16 sp (about 1/4000 pt).
|
|
%
|
|
\else
|
|
\epsftmp = \epsftsize
|
|
\divide \epsftmp by \epsfrsize
|
|
\epsfxsize = \epsfysize
|
|
\multiply \epsfxsize by \epsftmp
|
|
\multiply \epsftmp by \epsfrsize
|
|
\advance \epsftsize by -\epsftmp
|
|
\epsftmp = \epsfysize
|
|
\loop
|
|
\advance \epsftsize by \epsftsize
|
|
\divide \epsftmp by 2
|
|
\ifnum \epsftmp > 0
|
|
\ifnum \epsftsize < \epsfrsize
|
|
\else
|
|
\advance \epsftsize -\epsfrsize
|
|
\advance \epsfxsize \epsftmp
|
|
\fi
|
|
\repeat
|
|
\epsfrsize = 0pt
|
|
\fi
|
|
\else
|
|
\ifnum \epsfysize = 0
|
|
\epsftmp = \epsfrsize
|
|
\divide \epsftmp by \epsftsize
|
|
\epsfysize = \epsfxsize
|
|
\multiply \epsfysize by \epsftmp
|
|
\multiply \epsftmp by \epsftsize
|
|
\advance \epsfrsize by -\epsftmp
|
|
\epsftmp = \epsfxsize
|
|
\loop
|
|
\advance \epsfrsize by \epsfrsize
|
|
\divide \epsftmp by 2
|
|
\ifnum \epsftmp > 0
|
|
\ifnum \epsfrsize < \epsftsize
|
|
\else
|
|
\advance \epsfrsize by -\epsftsize
|
|
\advance \epsfysize by \epsftmp
|
|
\fi
|
|
\repeat
|
|
\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
|