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+% A package to generate LaTeX logos using the code developed for
+% TUGboat.
+
+\newcommand\DeclareLaTeXLogo[5]{\expandafter\def
+ \csname @LaTeX@#1/#2/#3\endcsname{{#4}{#5}}}
+% \end{macrocode}
+%
+% The default values are as used in the source of \LaTeX{} itself:
+%
+% \begin{macrocode}
+\def\@LaTeX@default{{.36}{.15}}
+% \end{macrocode}
+%
+%
+% Redefine \cs{LaTeX} to choose the parameters for the current font,
+% or to use the default value otherwise:
+%
+% \begin{macrocode}
+\DeclareRobustCommand\LaTeX{\expandafter\let\expandafter\reserved@a
+ \csname @LaTeX@\f@family/\f@series/\f@shape\endcsname
+ \ifx\reserved@a\relax\let\reserved@a\@LaTeX@default\fi
+ \expandafter\@LaTeX\reserved@a}
+% \end{macrocode}
+%
+% Here's the body of what was originally \cs{LaTeX}, pulled out with its
+% roots dripping onto the smoking ruin of original \LaTeX, and then
+% bits stuck in on the side.
+%
+% \cs{@LaTeX@default} provides parameters as one finds in the
+% original; other versions are added as needed.
+%
+% \begin{macrocode}
+\newcommand\@LaTeX[2]{L\kern-#1em
+ {\sbox\z@ T%
+ \vbox to\ht0{\hbox{$\m@th$%
+ \csname S@\f@size\endcsname
+ \fontsize\sf@size\z@
+ \math@fontsfalse\selectfont
+ A}%
+ \vss}%
+ }%
+ \kern-#2em%
+ \TeX}
+% \end{macrocode}
+%
+% Three more defined in the initial version, for bold CM sans (which is
+% used as \cs{SecTitleFont}), and CM italic medium and bold:
+%
+% \begin{macrocode}
+\DeclareOption{cm}{%
+ \DeclareLaTeXLogo{cmss}{bx}n{.3}{.15}%
+ \DeclareLaTeXLogo{cmr}m{it}{.3}{.27}%
+ \DeclareLaTeXLogo{cmr}{bx}{it}{.3}{.27}%
+}
+\DeclareOption{mbvx}{%
+ \DeclareLaTeXLogo{mbvx}{m}{n}{.27}{.08}%
+ \DeclareLaTeXLogo{mbvx}{m}{it}{.23}{.10}%
+ \DeclareLaTeXLogo{mbvx}{b}{n}{.23}{.10}%
+ \DeclareLaTeXLogo{mbvx}{b}{it}{.21}{.10}%
+}
+\DeclareOption*{\PackageWarning{ltx-logo}{No LaTeX logo shapes defined
+ for font family \CurrentOption\space-- yet}}
+\ProcessOptions
+% \end{macrocode}