Font utilities

The Web2c programs described here convert between various TeX-related font formats; the first section below briefly describes the formats. GFtoPK is the only one that is routinely used, as Metafont outputs GF format, but it's most efficient for device drivers to use PK.

The precise definitions of the PK, GF, TFM, PL, VF, and VPL formats mentioned below are in the source files that read them; `pktype.web', `gftype.web', `tftopl.web', etc.

• Font file formats: Explanations of GF, PK, TFM, VF, ...
• gftopk invocation: GF -> PK (compact)
• pktogf invocation: PK -> GF (expand).
• pktype invocation: PK -> human-readable text.
• gftype invocation: GF -> human-readable text.
• tftopl invocation: TFM -> PL (for editing TFM).
• pltotf invocation: PL -> TFM (make editing results usable).
• vftovp invocation: VF -> VPL (tftopl for virtual fonts).
• vptovf invocation: VPL -> VF (pltotf for virtual fonts).
• Font utilities available elsewhere: Type 1, BDF, editors, etc.

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