An
outline font (or "vector font") is one defined as a set of lines and curves,
as opposed to a
bitmap font.
An outline font (e.g.
PostScript,
TrueType) can be scaled to any size and otherwise transformed
more easily than a bitmap font, and with more attractive results,
though this requires a lot of numerical processing.
The result of transforming a character in an outline font in a particular way is often saved
as a bitmap in a font cache to avoid repeating the calculations if that character is to be drawn again.
Article based on [outline font] at [FOLDOC].
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