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==Font formats==
Most computer fonts used today are in ''bitmap'' or ''outline'' data formats. Bitmap fonts store fixed images for each glyph in each typeface and point size. Outline or ''vector'' fonts store characters as instructions for drawing each glyph's lines and curves. Outline fonts scale smoothly in size over a wide range.
Common font filename extensions include:
:{{Codeline|bdf}} and {{Codeline|bdf.gz}} – ''b''itmap ''d''istribution ''f''ormat and gzip compressed {{Codeline|bdf}}
:{{Codeline|pcf}} and {{Codeline|pcf.gz}} – bitmap ''p''ortable ''c''ompiled ''f''ont and gzip compressed {{Codeline|pcf}}
:{{Codeline|pfa}} and {{Codeline|pfb}} – outline ''P''ostScript ''f''ont ''A''SCII and ''P''ostScript ''f''ont ''b''inary. PostScript fonts carry built-in printer instructions.
:{{Codeline|ttf}} – outline ''T''rue''T''ype ''f''ont. Originally designed as a replacement for the PostScript fonts.
:{{Codeline|otf}} – outline ''O''pen''T''ype ''f''ont. TrueType with PostScript typographic instructions.
Some {{Codeline|ttf}} fonts are actually OpenType fonts and, for most purposes, the technical differences between TrueType and OpenType can be ignored. The OpenType format is published as the standard ''ISO/IEC 14496-22.''
The typesetting application, ''TeX,'' and its companion font software, ''Metafont,'' render glyphs using their own methods. Some of the file extensions used for fonts by these two programs are {{Codeline|*pk}}, {{Codeline|*gf}}, {{Codeline|mf}} and {{Codeline|vf}}.

Latest revision as of 05:31, 11 March 2013