tds: Modeless bitmaps

 
 C.2.3 Modeless bitmaps
 ----------------------
 
 The TDS specifies using a single directory `modeless/' as the mode name
 for those utilities which generate bitmaps, e.g.,
 `texmf/fonts/modeless/times/'.  This has the considerable advantage of
 not requiring each such directory name to be listed in a search path.
 
    An alternative was to use the utility name below which all such
 directories could be gathered.  That has the advantage of separating,
 say, `gsftopk'-generated bitmaps from `ps2pk'-generated ones.  However,
 we decided this was not necessary; most sites will use only one program
 for the purpose.  Also, PK and GF fonts generally identify their
 creator in the font comment following the `PK_ID' byte.
 
    We are making an implicit assumption that Metafont is the only
 program producing mode-dependent bitmaps. If this becomes false we
 could add an abbreviation for the program to mode names, as in `mfcx'
 vs.  `xyzcx' for a hypothetical program Xyz, or we could at that time
 add an additional program name level uniformly to the tree.  It seemed
 more important to concisely represent the current situation than to
 worry about hypothetical possibilities that may never happen.