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Types: TextFile
Names: »appendix.tex«
└─⟦52210d11f⟧ Bits:30007239 EUUGD2: TeX 3 1992-12
└─⟦af5ba6c8e⟧ »unix3.0/DVIWARE.tar.Z«
└─⟦ca79c7339⟧
└─⟦this⟧ »DVIware/laser-setters/dvi-to-ps/TeXPS/doc/appendix.tex«
\chapter{File Extensions}
% =======================
Here is a brief summary of the important file extensions
in the context of these programs:
\begin{enumerate}
\item {\tt afm}. Adobe font metric files. These are text files,
which contain the font metric information of each of the \PS\
fonts.
\item {\tt dvi}. (Output) device independent files. Generated by
\TeX, these files contain the typeset product in a format
independent of the final output device.
\item {\tt gf}. Generic font files. These files are the pixel
files as generated by \MF.
\item {\tt pfd}. \PS{} font description files. These text files
contain a description of what version of the \PS\ fonts
is to be produced, like for instance what encoding vector
is to be used. These files together with the
{\tt afm} file for the
corresponding font allow the computation of the {\tt pdr}
and the {\tt tfm} file of the font.
\item {\tt pdr}. \PS{} Driver files: these files contain
the information needed by a driver to generate the \PS\ code
for the \PS\ fonts.
\item {\tt pk}. Packed files, a more compact and also slightly
less general form of {\tt gf} files.
\item {\tt pxl}. Pixel files, an old format of pixel files.
\item {\tt tex}. \TeX{} source files.
\item {\tt tfm}. \TeX{} Font Metric files. These files contain
the font metric information as needed by \TeX.
\end{enumerate}
\chapter{{\tt dvitype} Notes}
\label{c-dvitype-notes}
Here a brief summary of the most important sections in {\tt
dvitype}:
\begin{itemize}
\item {\tt [14]}. The $h,u,v,x,z$ etc. business.
\item {\tt [17]}. $num$, $den$ and $mag$ definitions
\item {\tt [18]}. {\tt FNT\_DEF} stuff
\item {\tt [30]}. Font width stuff
\item {\tt [37]}. Most important part of the font width computation.
\item {\tt [39]}. {\tt tfm} width versus pixel width.
\item {\tt [40]}. Compute the pixel width. {\tt dvitype} computes
the pixel width, because it does not read any pixel files
\item {\tt [61]}. Read {\tt FNT\_DEF} command
\item {\tt [63]}. Load font\_space. It's $s\over6$.
\item {\tt [81]}. The multiway switch, where branching
takes place interpreting the various {\tt dvi} commands.
\item {\tt [83]}. {\tt PUSH} or {\tt POP} besides other instructions.
\item {\tt [84]}. defines {\it out\_space}, a routine to do
horizontal movements which incorporates
a threshold based on the current font to decide whether
a relative or absolute movement should be executed. Absolute
movements always incorporate accumulated rounding errors
which at that point are reduced to zero.
\item {\tt [85]}. similar to {\tt [84]}, but defines
{\it out\_vmove}, a routine to do
vertical movements. Again a threshold based on
the current font is used to decide whether an absolute
or a relative movement should be performed.
\item {\tt [88]}. {\tt SETCHAR} stuff.
\item {\tt [89]}. Finish a command that either sets or puts a
character, then goes to {\it move\_right}.
\item {\tt [90]}. Finish a command that either sets or puts a
rule, then goes to {\it move\_right}.
\item {\tt [91]}. Takes care of the {\tt maxdrift} business
in the case of horizontal movements.
\item {\tt [92]}. Takes care of the {\tt maxdrift} business
in the case of vertical movements.
\end{itemize}