fontinst with 8y.etx

Hilmar Schlegel Hilmar Schlegel <>
Wed, 17 Jun 1998 23:50:15 -0400

Berthold Horn wrote:
> At 03:22 PM 6/12/98 -0400, Hilmar Schlegel wrote:
> >> > Also due to different checksums it is
> >> > not straight forward to mix "raw" fonts from Y&Y and VFs made by
> >> > fontinst.
> >> You just turn off the encoding warnings in either case.  It is a pity
> >That's certainly not the intention...
> >> though not to agree on a sensible checksum algorithm :-), like
> >Fine would be *one* unique checksum in a scheme which *is* supported by
> >the software dealing with the fonts ;-)
> >> the mod 40 method to hide the font encoding.
> >Also the family code is handy place.
> NO.  The whole point of hiding information in the checksum
> rather than elsewhere in the TFM file is that the checksum is
> COPIED into the DVI file and hence accessible to the DVI driver!

Which then allows to use different TFM files with the same name and
differentiate them by their checksum...

> And yes, AFMtoTFM *also* uses the header fields to record
> some information in human readable form so you can just read
> a TFM file into a text editor and see what encoding was used.
> But that is not nearly as useful.

The problem is however how one will get the corresponding checksum into
a *given* PL or VPL file - aside from the support for the checksums in
the programs dealing with  the TFM files. It is in this respect a bit
like with XUIDs for Type 1 fonts...

Hilmar Schlegel

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