dvips: Font concepts
6.1 Font concepts
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The information needed to typeset using a particular font is contained
in two files: a "metric file" that contains shape-independent
information and a "glyph file" that contains the actual shapes of the
font's characters. A "virtual font" is an optional additional file that
can specify special ways to construct the characters. TeX itself (or
LaTeX) look only at the metric file, but DVI drivers such as Dvips look
at all three of these files.
An "encoding file" defines the correspondence between the code
numbers of the characters in a font and their descriptive names. Two
encoding files used together can describe a reencoding that rearranges,
i.e., renumbers, the characters of a font.
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