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New Font Format
Header Segments
For the HP LaserJet 4PJ printer, Font Header Format 15
has been extended to include optional data segments for
supporting galley characters, typeface strings, and
character enhancements. Font Format 16 supports these
segments plus optional segments for supporting vertical
substitution and a vertical rotation offset. (Segmented Font
Data is described beginning on page 11-45 of the PCL 5
Printer Language Technical Reference Manual.)
Galley Character Segment
If an application requests a character that does not exist
within the current font, the printer checks the Galley
Character Segment for a substitute character to print.
Vertical Substitution Character Segment
The Vertical Substitution Character Segment is used to
identify vertical substitute glyphs for characters which
change their appearance, orientation, or positioning when
written vertically.
Typeface String Segment
The Typeface String Segment allows names of permanent
downloaded fonts to be displayed, using non-Latin
characters, in the appropriate typeface on the Typeface List.
Vertical Rotation Segment
When the character text path direction is set to vertical
rotation, full-width characters are rotated counter-clockwise
90°. The Vertical Rotation Segment sets the point around
which the character rotates, so that character alignment is
compatible with the way Windows 3.1J rotates characters.
Character Enhancement Segment
The HP LaserJet 4PJ printer can apply pseudo-bold and
pseudo-italic enhancements to MS Mincho, MS Gothic, and
certain downloaded TrueType fonts. This segment is used to
indicate that a particular downloaded font is able to have
these character enhancements applied.
2-36 Printer-Specific Differences