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-%%% -*-TeX-*-
-%%% ====================================================================
-%%% @TeX-file{
-%%% author = "Tom Rokicki",
-%%% version = "2.7.3",
-%%% date = "23 July 2005",
-%%% time = "14:32:01 MDT",
-%%% filename = "epsf.tex",
-%%% address = "Tom Rokicki
-%%% Box 2081
-%%% Stanford, CA 94309
-%%% USA",
-%%% telephone = "+1 415 855 9989",
-%%% checksum = "20914 644 3054 26594",
-%%% email = "rokicki@cs.stanford.edu (Internet)",
-%%% codetable = "ISO/ASCII",
-%%% copyright = "This file is freely redistributable and
-%%% placed into the public domain by Tomas
-%%% Rokicki.",
-%%% keywords = "PostScript, TeX",
-%%% supported = "yes",
-%%% abstract = "This file contains macros to support the
-%%% inclusion of Encapsulated PostScript files
-%%% in TeX documents.",
-%%% docstring = "This file contains TeX macros to include an
-%%% Encapsulated PostScript graphic. It works
-%%% by finding the bounding box comment,
-%%% calculating the correct scale values, and
-%%% inserting a vbox of the appropriate size at
-%%% the current position in the TeX document.
-%%%
-%%% To use, simply use
-%%%
-%%% \input epsf % somewhere early on in your TeX file
-%%%
-%%% % then where you want to insert a vbox for a figure:
-%%% \epsfbox{filename.ps}
-%%%
-%%% Alternatively, you can supply your own
-%%% bounding box by
-%%%
-%%% \epsfbox[0 0 30 50]{filename.ps}
-%%%
-%%% This will not read in the file, and will
-%%% instead use the bounding box you specify.
-%%%
-%%% The effect will be to typeset the figure as
-%%% a TeX box, at the point of your \epsfbox
-%%% command. By default, the graphic will have
-%%% its `natural' width (namely the width of
-%%% its bounding box, as described in
-%%% filename.ps). The TeX box will have depth
-%%% zero.
-%%%
-%%% You can enlarge or reduce the figure by
-%%% using
-%%%
-%%% \epsfxsize = <dimen> \epsfbox{filename.ps}
-%%% or
-%%% \epsfysize = <dimen> \epsfbox{filename.ps}
-%%%
-%%% instead. Then the width of the TeX box will
-%%% be \epsfxsize and its height will be scaled
-%%% proportionately (or the height will be
-%%% \epsfysize and its width will be scaled
-%%% proportionately).
-%%%
-%%% The width (and height) is restored to zero
-%%% after each use, so \epsfxsize or \epsfysize
-%%% must be specified before EACH use of
-%%% \epsfbox.
-%%%
-%%% A more general facility for sizing is
-%%% available by defining the \epsfsize macro.
-%%% Normally you can redefine this macro to do
-%%% almost anything. The first parameter is
-%%% the natural x size of the PostScript
-%%% graphic, the second parameter is the
-%%% natural y size of the PostScript graphic.
-%%% It must return the xsize to use, or 0 if
-%%% natural scaling is to be used. Common uses
-%%% include:
-%%%
-%%% \epsfxsize % just leave the old value alone
-%%% 0pt % use the natural sizes
-%%% #1 % use the natural sizes
-%%% \hsize % scale to full width
-%%% 0.5#1 % scale to 50% of natural size
-%%% \ifnum #1 > \hsize \hsize \else #1\fi
-%%% % smaller of natural, hsize
-%%%
-%%% If you want TeX to report the size of the
-%%% figure (as a message on your terminal when
-%%% it processes each figure), use
-%%% `\epsfverbosetrue'.
-%%%
-%%% If you only want to get the bounding box
-%%% extents, without producing any output boxes
-%%% or \special{}, then use \epsfgetbb{filename}.
-%%% The bounding box corner coordinates are saved
-%%% in the macros \epsfllx, \epsflly, \epsfurx,
-%%% and \epsfury in PostScript units of big
-%%% points.
-%%%
-%%% Revision history:
-%%%
-%%% ---------------------------------------------
-%%% epsf.tex macro file:
-%%% Originally written by Tomas Rokicki of
-%%% Radical Eye Software, 29 Mar 1989.
-%%%
-%%% ---------------------------------------------
-%%% Revised by Don Knuth, 3 Jan 1990.
-%%%
-%%% ---------------------------------------------
-%%% Revised by Tomas Rokicki, 18 Jul 1990.
-%%% Accept bounding boxes with no space after
-%%% the colon.
-%%%
-%%% ---------------------------------------------
-%%% Revised by Nelson H. F. Beebe
-%%% <beebe@math.utah.edu>, 03 Dec 1991 [2.0].
-%%% Add version number and date typeout.
-%%%
-%%% Use \immediate\write16 instead of \message
-%%% to ensure output on new line.
-%%%
-%%% Handle nested EPS files.
-%%%
-%%% Handle %%BoundingBox: (atend) lines.
-%%%
-%%% Do not quit when blank lines are found.
-%%%
-%%% Add a few percents to remove generation of
-%%% spurious blank space.
-%%%
-%%% Move \special output to
-%%% \epsfspecial{filename} so that other macro
-%%% packages can input this one, then change
-%%% the definition of \epsfspecial to match
-%%% another DVI driver.
-%%%
-%%% Move size computation to \epsfsetsize which
-%%% can be called by the user; the verbose
-%%% output of the bounding box and scaled width
-%%% and height happens here.
-%%%
-%%% ---------------------------------------------
-%%% Revised by Nelson H. F. Beebe
-%%% <beebe@math.utah.edu>, 05 May 1992 [2.1].
-%%% Wrap \leavevmode\hbox{} around \vbox{} with
-%%% the \special so that \epsffile{} can be
-%%% used inside \begin{center}...\end{center}
-%%%
-%%% ---------------------------------------------
-%%% Revised by Nelson H. F. Beebe
-%%% <beebe@math.utah.edu>, 09 Dec 1992 [2.2].
-%%% Introduce \epsfshow{true,false} and
-%%% \epsfframe{true,false} macros; the latter
-%%% suppresses the insertion of the PostScript,
-%%% and instead just creates an empty box,
-%%% which may be handy for rapid prototyping.
-%%%
-%%% ---------------------------------------------
-%%% Revised by Nelson H. F. Beebe
-%%% <beebe@math.utah.edu>, 14 Dec 1992 [2.3].
-%%% Add \epsfshowfilename{true,false}. When
-%%% true, and \epsfshowfalse is specified, the
-%%% PostScript file name will be displayed
-%%% centered in the figure box.
-%%%
-%%% ---------------------------------------------
-%%% Revised by Nelson H. F. Beebe
-%%% <beebe@math.utah.edu>, 20 June 1993 [2.4].
-%%% Remove non-zero debug setting of \epsfframemargin,
-%%% and change margin handling to preserve EPS image
-%%% size and aspect ratio, so that the actual
-%%% box is \epsfxsize+\epsfframemargin wide by
-%%% \epsfysize+\epsfframemargin high.
-%%% Reduce output of \epsfshowfilenametrue to
-%%% just the bare file name.
-%%%
-%%% ---------------------------------------------
-%%% Revised by Nelson H. F. Beebe
-%%% <beebe@math.utah.edu>, 13 July 1993 [2.5].
-%%% Add \epsfframethickness for control of
-%%% \epsfframe frame lines.
-%%%
-%%% ---------------------------------------------
-%%% Revised by Nelson H. F. Beebe
-%%% <beebe@math.utah.edu>, 02 July 1996 [2.6]
-%%% Add missing initialization \epsfatendfalse;
-%%% the lack of this resulted in the wrong
-%%% BoundingBox being picked up, mea culpa, sigh...
-%%%
-%%% ---------------------------------------------
-%%% Revised by Nelson H. F. Beebe
-%%% <beebe@math.utah.edu>, 25 October 1996 [2.7]
-%%% Update to match changes in from dvips 5-600
-%%% distribution: new user-accessible macros:
-%%% \epsfclipon, \epsfclipoff, \epsfdrafton,
-%%% \epsfdraftoff, change \empty to \epsfempty.
-%%%
-%%% ---------------------------------------------
-%%% Revised by Nelson H. F. Beebe
-%%% <beebe@math.utah.edu>, 18 May 2002 [2.7.1]
-%%% Add write statements to echo input file
-%%% names. Prior to that change, an error in
-%%% such a file could be quite hard to track
-%%% down: a long list of TeX page numbers could
-%%% suddenly be followed by ``TeX buffer
-%%% capacity'' exceeded, without any indication
-%%% of the file that was responsible.
-%%%
-%%% ---------------------------------------------
-%%% Revised by Nelson H. F. Beebe
-%%% <beebe@math.utah.edu>, 16 May 2003 [2.7.2]
-%%% Supply two critical percent characters that
-%%% were mistakenly omitted in version 2.7.1,
-%%% and resulted in a small amount of spurious
-%%% horizontal space.
-%%%
-%%% ---------------------------------------------
-%%% Revised by Nelson H. F. Beebe
-%%% <beebe@math.utah.edu>, Karl Berry
-%%% <karl@freefriends.org>, and Robin Fairbairns
-%%% <Robin.Fairbairns@cl.cam.ac.uk>,
-%%% 23 July 2005 [2.7.3]
-%%% Add critical \hbox{} wrapper in \epsfsetgraph
-%%% so that \epsfbox{} does not conflict with
-%%% LaTeX center environment when \epsfbox{} is
-%%% surrounded by other horizonal objects.
-%%% Improve macro readability by adding legal,
-%%% but invisible-in-typeset-output, spaces.
-%%% Ensure that verbose status reports come
-%%% inside (filename ...) list.
-%%%
-%%% ---------------------------------------------
-%%% The checksum field above contains a CRC-16
-%%% checksum as the first value, followed by
-%%% the equivalent of the standard UNIX wc
-%%% (word count) utility output of lines,
-%%% words, and characters. This is produced by
-%%% Robert Solovay's checksum utility.",
-%%% }
-%%% ====================================================================
-
-%\immediate \write16 {This is `epsf.tex' v2.0 <02 Dec 1991>}%
-%\immediate \write16 {This is `epsf.tex' v2.1 <05 May 1992>}%
-%\immediate \write16 {This is `epsf.tex' v2.2 <09 Dec 1992>}%
-%\immediate \write16 {This is `epsf.tex' v2.3 <14 Dec 1992>}%
-%\immediate \write16 {This is `epsf.tex' v2.4 <20 June 1993>}%
-%\immediate \write16 {This is `epsf.tex' v2.5 <13 July 1993>}%
-%\immediate \write16 {This is `epsf.tex' v2.6 <02 July 1996>}%
-%\immediate \write16 {This is `epsf.tex' v2.7 <25 October 1996>}%
-%\immediate \write16 {This is `epsf.tex' v2.7.1 <18 May 2002>}%
-%\immediate \write16 {This is `epsf.tex' v2.7.2 <16 May 2003>}%
-\immediate \write16 {This is `epsf.tex' v2.7.3 <23 July 2005>}%
-%
-\newread \epsffilein % file to \read
-\newif \ifepsfatend % need to scan to LAST %%BoundingBox comment?
-\newif \ifepsfbbfound % success?
-\newif \ifepsfdraft % use draft mode?
-\newif \ifepsffileok % continue looking for the bounding box?
-\newif \ifepsfframe % frame the bounding box?
-\newif \ifepsfshow % show PostScript file, or just bounding box?
-\epsfshowtrue % default is to display PostScript file
-\newif \ifepsfshowfilename % show the file name if \epsfshowfalse specified?
-\newif \ifepsfverbose % report what you're making?
-\newdimen \epsfframemargin % margin between box and frame
-\newdimen \epsfframethickness % thickness of frame rules
-\newdimen \epsfrsize % vertical size before scaling
-\newdimen \epsftmp % register for arithmetic manipulation
-\newdimen \epsftsize % horizontal size before scaling
-\newdimen \epsfxsize % horizontal size after scaling
-\newdimen \epsfysize % vertical size after scaling
-\newdimen \pspoints % conversion factor
-%
-\pspoints = 1bp % Adobe points are `big'
-\epsfxsize = 0pt % default value, means `use natural size'
-\epsfysize = 0pt % ditto
-\epsfframemargin = 0pt % default value: frame box flush around picture
-\epsfframethickness = 0.4pt % TeX's default rule thickness
-%
-\def \epsfbox #1{%
- \global \def \epsfllx {72}%
- \global \def \epsflly {72}%
- \global \def \epsfurx {540}%
- \global \def \epsfury {720}%
- \def \lbracket {[}%
- \def \testit {#1}%
- \ifx \testit \lbracket
- \let \next = \epsfgetlitbb
- \else
- \let \next = \epsfnormal
- \fi
- \next{#1}%
-}%
-%
-% We use \epsfgetlitbb if the user specified an explicit bounding box,
-% and \epsfnormal otherwise. Because \epsfgetbb can be called
-% separately to retrieve the bounding box, we move the verbose
-% printing the bounding box extents and size on the terminal to
-% \epsfstatus. Therefore, when the user provided the bounding box,
-% \epsfgetbb will not be called, so we must call \epsfsetsize and
-% \epsfstatus ourselves.
-%
-\def \epsfgetlitbb #1#2 #3 #4 #5]#6{%
- \epsfgrab #2 #3 #4 #5 .\\%
- \epsfsetsize
- \epsfstatus{#6}%
- \epsfsetgraph{#6}%
-}%
-%
-\def \epsfnormal #1{%
- \epsfgetbb{#1}%
- \epsfsetgraph{#1}%
-}%
-%
-\def \epsfgetbb #1{%
-%
-% The first thing we need to do is to open the
-% PostScript file, if possible.
-%
- \openin\epsffilein=#1
- \immediate \write16 {(#1}%
- \ifeof \epsffilein
- \errmessage{Could not open file #1, ignoring it}%
- \else %process the file
- {% %start a group to contain catcode changes
- % Make all special characters, except space, to be of type
- % `other' so we process the file in almost verbatim mode
- % (TeXbook, p. 344).
- \chardef \other = 12%
- \def \do ##1{\catcode`##1=\other}%
- \dospecials
- \catcode `\ = 10%
- \epsffileoktrue %true while we are looping
- \epsfatendfalse %[02-Jul-1996]: add forgotten initialization
- \loop %reading lines from the EPS file
- \read \epsffilein to \epsffileline
- \ifeof \epsffilein %then no more input
- \epsffileokfalse %so set completion flag
- \else %otherwise process one line
- \expandafter \epsfaux \epsffileline :. \\%
- \fi
- \ifepsffileok
- \repeat
- \ifepsfbbfound
- \else
- \ifepsfverbose
- \immediate \write16 {No BoundingBox comment found in %
- file #1; using defaults}%
- \fi
- \fi
- }% %end catcode changes
- \closein\epsffilein
- \fi %end of file processing
- \epsfsetsize %compute size parameters
- \epsfstatus{#1}%
- \immediate \write16 {)}%
-}%
-%
-% Clipping control:
-\def \epsfclipon {\def \epsfclipstring { clip}}%
-\def \epsfclipoff {\def \epsfclipstring {\ifepsfdraft \space clip\fi}}%
-\epsfclipoff % default for dvips is OFF
-%
-% The special that is emitted by \epsfsetgraph comes from this macro.
-% It is defined separately to allow easy customization by other
-% packages that first \input epsf.tex, then redefine \epsfspecial.
-% This macro is invoked in the lower-left corner of a box of the
-% width and height determined from the arguments to \epsffile, or
-% from the %%BoundingBox in the EPS file itself.
-%
-% This version is for dvips:
-\def \epsfspecial #1{%
- \epsftmp=10\epsfxsize
- \divide \epsftmp by \pspoints
- \ifnum \epsfrsize = 0%
- \relax
- \special{PSfile=\ifepsfdraft psdraft.ps\else#1\fi\space
- llx=\epsfllx\space
- lly=\epsflly\space
- urx=\epsfurx\space
- ury=\epsfury\space
- rwi=\number\epsftmp
- \epsfclipstring
- }%
- \else
- \epsfrsize=10\epsfysize
- \divide \epsfrsize by \pspoints
- \special{PSfile=\ifepsfdraft psdraft.ps\else#1\fi\space
- llx=\epsfllx\space
- lly=\epsflly\space
- urx=\epsfurx\space
- ury=\epsfury\space
- rwi=\number\epsftmp
- rhi=\number\epsfrsize
- \epsfclipstring
- }%
- \fi
-}%
-%
-% \epsfframe macro adapted from the TeXbook, exercise 21.3, p. 223, 331.
-% but modified to set the box width to the natural width, rather
-% than the line width, and to include space for margins and rules
-\def \epsfframe #1%
-{%
- % method for detecting latex suggested by Robin Fairbairns, May 2005.
- \ifx \documentstyle \epsfundefined
- \relax
- \else
-% \leavevmode % so we can put this inside
- % a latex centered environment
- % The \leavevmode breaks under plain when this is inside a box,
- % because it forces the figure to be the entire \hsize. On the
- % other hand, we need the \leavevmode for it to work in LaTeX,
- % because the {center} environment works by adjusting TeX's
- % paragraph parameters.
- %
- % Compare the LaTeX sequence
- % \begin{center}
- % \epsfbox{tip.eps}q
- % \end{center}
- % (needs the \leavevmode to put the q right next to the image)
- %
- % with the plain TeX sequence:
- % \leftline{\vbox{\epsfbox{tip.eps}}q}
- % (had the q all the way over to the right, when \leavevmode was used)
- \fi
- %
- \setbox0 = \hbox{#1}%
- \dimen0 = \wd0 % natural width of argument
- \advance \dimen0 by 2\epsfframemargin % plus width of 2 margins
- \advance \dimen0 by 2\epsfframethickness % plus width of 2 rule lines
- \relax
- \hbox{%
- \vbox
- {%
- \hrule height \epsfframethickness depth 0pt
- \hbox to \dimen0
- {%
- \hss
- \vrule width \epsfframethickness
- \kern \epsfframemargin
- \vbox {\kern \epsfframemargin \box0 \kern \epsfframemargin }%
- \kern \epsfframemargin
- \vrule width \epsfframethickness
- \hss
- }% end hbox
- \hrule height 0pt depth \epsfframethickness
- }% end vbox
- }% end hbox
- \relax
-}%
-%
-\def \epsfsetgraph #1%
-{%
- %
- % Make the vbox and stick in a \special that the DVI driver can
- % parse. \vfil and \hfil are used to place the \special origin at
- % the lower-left corner of the vbox. \epsfspecial can be redefined
- % to produce alternate \special syntaxes.
- %
- \ifvmode \leavevmode \fi
- \relax
- \hbox{% so we can put this in \begin{center}...\end{center}
- \ifepsfframe \expandafter \epsfframe \fi
- {\vbox to\epsfysize
- {%
- \ifepsfshow
- % output \special{} at lower-left corner of figure box
- \vfil
- \hbox to \epsfxsize{\epsfspecial{#1}\hfil}%
- \else
- \vfil
- \hbox to\epsfxsize{%
- \hss
- \ifepsfshowfilename
- {%
- \epsfframemargin=3pt % local change of margin
- \epsfframe{{\tt #1}}%
- }%
- \fi
- \hss
- }%
- \vfil
- \fi
- }%
- }}%
- \relax
- %
- % Reset \epsfxsize and \epsfysize, as documented above.
- %
- \global \epsfxsize = 0pt
- \global \epsfysize = 0pt
-}%
-%
-% Now we have to calculate the scale and offset values to use.
-% First we compute the natural sizes.
-%
-\def \epsfsetsize
-{%
- \epsfrsize = \epsfury \pspoints
- \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