summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/source/latex/base/exscale.dtx
blob: 856aef09a6b1cb91c590996f39d645dc9997c191 (plain)
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
% \iffalse meta-comment
%
% Copyright 1993-2015
% The LaTeX3 Project and any individual authors listed elsewhere
% in this file.
%
% This file is part of the LaTeX base system.
% -------------------------------------------
%
% It may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
%    http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
%
% This file has the LPPL maintenance status "maintained".
%
% The list of all files belonging to the LaTeX base distribution is
% given in the file `manifest.txt'. See also `legal.txt' for additional
% information.
%
% The list of derived (unpacked) files belonging to the distribution
% and covered by LPPL is defined by the unpacking scripts (with
% extension .ins) which are part of the distribution.
%
% \fi
% \iffalse
%%% File: exscale.dtx
%% Copyright (C) 1992-1997,2007 Frank Mittelbach and Rainer Sch\"opf,
%% all rights reserved.
%<package>\NeedsTeXFormat{LaTeX2e}
%<package>\ProvidesPackage{exscale}
%<fd,    >\ProvidesFile{OMXcmex.fd}
%<package,fd>     [2014/09/29 v2.1h
%<package>                         Standard LaTeX package exscale]
%<fd,    >                         exscale package font definitions]
%<*driver>
\documentclass{ltxdoc}
\usepackage{exscale}
\GetFileInfo{exscale.sty}
\begin{document}
\title{The \texttt{exscale} package\thanks
       {This file has version number \fileversion, dated \filedate.}\\
      for use with \LaTeX2e}
\author{Frank Mittelbach \and Rainer Sch\"opf}
\date{\filedate}
\MaintainedByLaTeXTeam{latex}
 \maketitle
 \DocInput{exscale.dtx}
\end{document}
%</driver>
% \fi
%
% \CheckSum{41}
%
% \changes{v2.1g}{1997/06/16}{Documentation fix.}
% \changes{v2.1d}{1994/05/09}{Added setting \cs{big}... sizes.}
% \changes{v2.1c}{1994/05/08}{Changed to new documentation standards.}
% \changes{v2.1a}{1993/12/12}{Update for \LaTeXe}
%
% \def\MF{\textsf{Metafont}}
% \def\dst{{\normalfont\scshape docstrip}}
%
%
% \section{Introduction}
%
% On popular request, this package implements scaling of the
% math extension font `cmex'. If this package is used the site needs
% scaled versions of the \texttt{cmex10} in the sizes 10.95pt, 12pt,
% 14.4pt , 17.28pt, 20.74pt, and 24.88pt which corresponds to standard
% magsteps using |\magstephalf|, and |\magstep1| through |\magstep5|.
% Additionally `cmex' variants for the sizes 7pt to 9pt are necessary.
% These fonts are part of the AMS font package and can be found on
% many servers.
%
% We don't think that using a scalable `cmex' font improves the
% appearance of the document very much because the linear scaling of
% the font introduces changes to font dimen parameters of the font
% that are used all over the place in \TeX's math placement routines
% and definitely shouldn't be scaled linearly.  As a positive result,
% however, symbols from this font will come out in approximately the
% right size when used with a large basis font size.
%
% We therefore strongly recommend the generation of designed fonts for
% the larger sizes and hope that the corresponding \MF{} sources will
% be available in the near future.
%
%
% \section{Usage}
%
% This file can be used either as a package by placing its name
% in the argument of
% |\usepackage|, or by generating from it a |.fd| file which then
% replaces the normally used |.fd| file |OMXcmex.fd|.
%
% For the second solution you should prepare a small \dst{} command
% file containing the following statements:
% \begin{quote}
%   |\def\batchfile{|\meta{name-of-your-command-file}|}|  \\
%   |\input docstrip.tex|                         \\
%   |\generateFile{OMXcmex.fd}{t}{\from{exscale.dtx}{fd}}|
% \end{quote}
% and then run this file through \LaTeX.
% This would mean however, that your documents may look different if
% they are printed on another installation whereas when using the
% package file they would come out the same on both sites.
%
% \StopEventually{}
%
%
% \section{Implementation}
%
%
%    In case this should produce a font definition file we write
%    a message to the transcript file only.
%    The explicit spaces are necessary in an
%    |.fd| file and the |\string| guards against situations where |`|,
%    |<| or |>| is active.
% \changes{v2.1f}{1995/11/27}{Use \cs{ProvidesFile}}
%    \begin{macrocode}
%\ProvidesFile{OMXcmex.fd}[]% moved to top of the file
%    \end{macrocode}
%
% We now define to which external fonts the font/shape Computer Modern
% Extension Medium Normal. For the sizes 7--10pt we use fonts that are
% designed for the corresponding size and for the higher sizes we use
% scaled versions of the 10pt font since for these sizes no designed
% fonts are easily available.
%    \begin{macrocode}
%<*fd|package>
\DeclareFontShape{OMX}{cmex}{m}{n}{%
%    \end{macrocode}
%    According to Michael Downes `cmex5' and `cmex6' are not
%    distributed currently. Therefore we use `cmex7' in those size but
%    we omit a warning.
%    \begin{macrocode}
      <-8>sfixed * cmex7
      <8> cmex8
      <9> cmex9
      <10> <10.95> <12> <14.4> <17.28> <20.74> <24.88>cmex10
       }{}
%</fd|package>
%    \end{macrocode}
%
% We also redeclare the symbol font for large symbols. This is
% already done when the base format also uses CM math fonts, but it
% doesn't hurt either.
%    \begin{macrocode}
%<*package>
\DeclareSymbolFont{largesymbols}{OMX}{cmex}{m}{n}
%    \end{macrocode}
%
% Finally we redefine the primitive commands |\big|, |\Big|, |\bigg|
% and |\Bigg| to change size with main size changes. To this end we
% need a new dimen register |\big@size|.
%    \begin{macrocode}
\newdimen\big@size
%    \end{macrocode}
% This dimen is set with every size change to $1.2$ times the height
% of a left parenthesis.
% \changes{v2.1e}{1994/11/06}{Renamed \cs{every@size} to
%                             \cs{every@math@size}}
% \changes{v2.1e}{1994/11/06}{Update \cs{big@size} globally}
% \changes{v2.1h}{2001/10/29}{Use box 0 within group to avoid changing this
%                             scratch register}
%    \begin{macrocode}
\addto@hook\every@math@size{%
  \begingroup
     \setbox\z@\vbox{\hbox{$($}\kern\z@}%
     \global\big@size 1.2\ht\z@
  \endgroup}
%    \end{macrocode}
% Now we can define the macros. Note: |\n@space| sets the internal
% variables |\nulldelimiterspace| and |\mathsurround| to zero length.
%    \begin{macrocode}
\def\bBigg@#1#2{%
   {\hbox{$\left#2\vcenter to#1\big@size{}\right.\n@space$}}}
\def\big{\bBigg@\@ne}
\def\Big{\bBigg@{1.5}}
\def\bigg{\bBigg@\tw@}
\def\Bigg{\bBigg@{2.5}}
%</package>
%    \end{macrocode}
%
% \Finale
%
\endinput