1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
% EPSF.TEX macro file:
% Written by Tomas Rokicki of Radical Eye Software, 29 Mar 1989.
% Revised by Don Knuth, 3 Jan 1990.
% Revised by Tomas Rokicki to accept bounding boxes with no
% space after the colon, 18 Jul 1990.
% Revised by Craig Barratt to support psfrag facility (changes should
% be upward compatable), 29 Feb 1992.
%
% TeX macros to include an Encapsulated PostScript graphic.
% 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 with the center environment of LaTeX, preface the \epsffile
% call with a \leavevmode. (LaTeX should probably supply this itself
% for the center environment.)
%
% To use, simply say
% \input epsf % somewhere early on in your TeX file
% \epsfbox{filename.ps} % where you want to insert a vbox for a figure
%
% Alternatively, you can type
%
% \epsfbox[0 0 30 50]{filename.ps} % to supply your own BB
%
% which 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 saying
% \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 proportiontally). The
% width (and height) is restored to zero after each use.
%
% 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), say `\epsfverbosetrue'.
%
\newread\epsffilein % file to \read
\newif\ifepsffileok % continue looking for the bounding box?
\newif\ifepsfbbfound % success?
\newif\ifepsfverbose % report what you're making?
\newdimen\epsfxsize % horizontal size after scaling
\newdimen\epsfysize % vertical size after scaling
\newdimen\epsftsize % horizontal size before scaling
\newdimen\epsfrsize % vertical size before scaling
\newdimen\epsftmp % register for arithmetic manipulation
\newdimen\pspoints % conversion factor
%
% These two dimensions are computed by epsf and used by the psfrag
% macros for placing the TeX fragments. With epsf they are always
% equal (since epsf preserves the aspect ratio).
%
\newdimen\epsfhbpsize % size after horizontal scaling of 1bp
\newdimen\epsfvbpsize % size after vertical scaling of 1bp
%
\pspoints=1bp % Adobe points are `big'
\epsfxsize=0pt % Default value, means `use natural size'
\epsfysize=0pt % ditto
%
\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}}%
%
\def\epsfgetlitbb#1#2 #3 #4 #5]#6{\epsfgrab #2 #3 #4 #5 .\\%
\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
\ifeof\epsffilein\errmessage{I couldn't open #1, will ignore it}\else
%
% Okay, we got it. Now we'll scan lines until we find one that doesn't
% start with %. We're looking for the bounding box comment.
%
{\epsffileoktrue \chardef\other=12
\def\do##1{\catcode`##1=\other}\dospecials \catcode`\ =10
\loop
\read\epsffilein to \epsffileline
\ifeof\epsffilein\epsffileokfalse\else
%
% We check to see if the first character is a % sign;
% if not, we stop reading (unless the line was entirely blank);
% if so, we look further and stop only if the line begins with
% `%%BoundingBox:'.
%
\expandafter\epsfaux\epsffileline:. \\%
\fi
\ifepsffileok\repeat
\ifepsfbbfound\else
\ifepsfverbose\message{No bounding box comment in #1; using defaults}\fi\fi
}\closein\epsffilein\fi}%
%
% Now we have to calculate the scale and offset values to use.
% First we compute the natural sizes.
%
\def\epsfsetgraph#1{%
\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
%
% 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\epsfrsize
\epsfxsize=\epsfysize \multiply\epsfxsize\epsftmp
\multiply\epsftmp\epsfrsize \advance\epsftsize-\epsftmp
\epsftmp=\epsfysize
\loop \advance\epsftsize\epsftsize \divide\epsftmp 2
\ifnum\epsftmp>0
\ifnum\epsftsize<\epsfrsize\else
\advance\epsftsize-\epsfrsize \advance\epsfxsize\epsftmp \fi
\repeat
\fi
\else\epsftmp=\epsfrsize \divide\epsftmp\epsftsize
\epsfysize=\epsfxsize \multiply\epsfysize\epsftmp
\multiply\epsftmp\epsftsize \advance\epsfrsize-\epsftmp
\epsftmp=\epsfxsize
\loop \advance\epsfrsize\epsfrsize \divide\epsftmp 2
\ifnum\epsftmp>0
\ifnum\epsfrsize<\epsftsize\else
\advance\epsfrsize-\epsftsize \advance\epsfysize\epsftmp \fi
\repeat
\fi
%
% Compute \epsfhbpsize and \epsfvbpsize (they're equal). This is the
% dimen that 1 pspoint becomes after scaling. These dimens are used
% by the psfrag macros, so we only bother to compute them if \psfrag
% is defined.
%
\expandafter\ifx\csname psfrag\endcsname\relax\else
\epsftsize=\epsfurx\pspoints
\advance\epsftsize by-\epsfllx\pspoints
\epsfrsize=1\pspoints
\ifnum\epsfxsize=0
\epsfhbpsize=1\pspoints
\else\epsftmp=\epsfrsize \divide\epsftmp\epsftsize
\epsfhbpsize=\epsfxsize \multiply\epsfhbpsize\epsftmp
\multiply\epsftmp\epsftsize \advance\epsfrsize-\epsftmp
\epsftmp=\epsfxsize
\loop \advance\epsfrsize\epsfrsize \divide\epsftmp 2
\ifnum\epsftmp>0
\ifnum\epsfrsize<\epsftsize\else
\advance\epsfrsize-\epsftsize \advance\epsfhbpsize\epsftmp \fi
\repeat
\fi
% same in vertical direction
\epsfvbpsize=\epsfhbpsize
\fi
%
% Finally, we make the vbox and stick in a \special that dvips can parse.
%
\ifepsfverbose\message{#1: width=\the\epsfxsize, height=\the\epsfysize}\fi
%
% check if psfrag is defined and that we can open the psfrag file
%
\epsffileokfalse%
\expandafter\ifx\csname psfrag\endcsname\relax\else%
\openin\epsffilein=#1frag
\ifeof\epsffilein\else%
\closein\epsffilein%
\epsffileoktrue%
\fi\fi%
\epsftmp=10\epsfxsize \divide\epsftmp\pspoints
\vbox to\epsfysize{\vfil\hbox to\epsfxsize{%
% we put our fragments and the special into two 0pt x 0pt boxes
% so we can be sure they end up at exactly the same place.
\ifepsffileok
\def\PsFragSpecialArgs{PSfile=#1 llx=\epsfllx\space lly=\epsflly %
\space urx=\epsfurx\space ury=\epsfury\space rwi=\number\epsftmp}%
\input{#1frag}%
\else
\special{PSfile=#1 llx=\epsfllx\space lly=\epsflly\space
urx=\epsfurx\space ury=\epsfury\space rwi=\number\epsftmp}%
\fi\hfil}}%
\epsfxsize=0pt\epsfysize=0pt}%
%
% 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}}%
%
% So we're ready to check for `%BoundingBox:' and to grab the
% values if they are found.
%
\long\def\epsfaux#1#2:#3\\{\ifx#1\epsfpercent
\def\testit{#2}\ifx\testit\epsfbblit
\epsfgrab #3 . . . \\%
\epsffileokfalse
\global\epsfbbfoundtrue
\fi\else\ifx#1\par\else\epsffileokfalse\fi\fi}%
%
% Here we grab the values and stuff them in the appropriate definitions.
%
\def\epsfgrab #1 #2 #3 #4 #5\\{%
\global\def\epsfllx{#1}\ifx\epsfllx\empty
\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
|
