Guide to LaTeX (4th Edition) (Tools and Techniques

154 Chapter 6. Graphics Inclusion and Color
because of their indispensability in producing professional documents
and camera-ready copy. Provided by Sebastian Rahtz and David Carlisle
and many other contributors, they can be expected to be part of every L AT E X
installation. A basic manual is provided in a file named grfguide.tex,
which may already be preprocessed to.dvi or some other form. Even more
details on these packages and on advanced applications of PostScript to
L AT E X are to be found in the book The L AT E X Graphics Companion (Goossens
et al., 1997).
The commands defined by these packages are the building blocks
for other packages that either emulate the older driver-specific ones or
provide a more comfortable syntax for these functions. As long as these
other packages are based on graphics and color, they should be equally
compatible with all the supported drivers.
These features are not limited to PostScript drivers. As long as a
driver can support the inclusion and manipulation (scaling, rotation) of
graphics, and/or the use of color, a.def file can be written to enable it to
make use of the standardized graphics and color commands.
Driver names that may be used as options are
dvipdf
dvipdfm
dvips
dvipsone
dviwin ◭⊲⇑
emtex ◭⊲⇑
oztex
pctex32
pctexhp ◭⊲⇑
pctexps
pctexwin ◭⊲⇑
pdftex
tcidvi ⇑
textures
truetex ⇑
vtex
(Limited functionality: ◭⊲ no color support; no scaling; ⇑ no rotation.)
The xdvi previewer (and its Windows equivalent windvi) work with
PostScript graphics; although there is also an xdvi option, it is only an
alias for dvips.
A driver option must be specified when loading the graphics and
color packages, for example, as
\usepackage[dvips]{graphics,color}
However, it is possible to establish a default for the local configuration,
as described in Section 6.1.7. It is conceivable that your installation has
already done this, so it is worth doing an experiment to see if a default
driver option already exists.
6.1.1 Importing external graphics
We wish to have a graphics file produced by some other program included
in the document, possibly scaled to a desired size or rotated by 90 ◦ . One
wants to do by computer what used to be done with scissors and glue.
There are two packages available for importing and manipulating external
graphics files: the basic graphics package and the more extended
graphicx one. They both offer identical functionality, differing only in
their syntax.