User`s manual

Conversion Process

Metrics Files

TransType uses the following sequence to create known font metrics:

AFM+INF, PFM, PFB. If metrics for a particular character are not present

in the PFM file, then they are extracted from the font file (PFB). After

conversion the metrics information is stored in the FOND resource, as

required by the Mac OS. Here is a more detailed description of the

algorithm that is applied by TransType to find a metrics file:

1. It looks for the name.AFM file (name is the name of the PFB file:

name.pfb) located in the same folder. If it locates the file, it extracts

the metrics from it.

2. If the AFM file is not present, it looks for the name.PFM file in the

same folder and, if the file is not found there, in the PFM subfolder of

the current folder.

3. If the PFM file is found, it reads the kerning and metrics data from it.

Then TransType opens the PFB file and partially interprets it to extract

the metrics for the characters that are not covered by the PFM.