HP PCL/PJL reference - PCL 5 Comparison Guide

2-62 Printer-Specific Differences ENWW
Font Header Format 16 Bitmap Font Support
Font Header Format 16 was introduced with the HP LaserJet 4PJ for
downloading large TrueType fonts. For the HP LaserJet 4V, Font
Header Format 16 has been extended to support large bitmap fonts
as well. The Font Header command (
? ) s # W [font header data] ) is
used to download font header data to the printer.
A large font is a bound font with character codes that are not limited to
8-bit values. For this reason a large font is sometimes called a 16-bit
font.
Font Header Format
Font Header Format 16 was introduced because some font data
segments in large fonts could be larger than 65535 bytes, and this
was not supported by Font Header Format 15. The structures of
Format 15 and Format 16 are identical with the exception of the
Segment Size field in the Segmented Font Data format. Table 2-10
below shows the Format 15 and Format 16 Font Header format.
Table 2-11 shows the Format 15 Segmented Font Data format.
Table 2-12 shows the Format 16 Segmented Font Data format. Note
that Format 15 does not support bitmap fonts.