Load Font Equivalence
The font equivalence record is a list of 0 to 254 font equivalence entries (each entry is 16 bytes). The
font equivalence record permits the host program to equate a Local-Font ID (specified in text control p.
129 "Set Coded Font Local", p.188 "Bar Code Data Descriptor", p.186 "Write Bar Code Control", or
graphics order "Character Set", IPDS Technical Reference 1) with:
•
Font Host Assigned ID (HAID)
• The Font Inline Sequence or character rotation table to be used when processing characters
• Global Resource ID (GRID) for resident fonts. The GRID is made up of the following components:
• GCSGID Graphic Character Set Global ID
• CPGID Code Page Global ID
• FGID Font Global ID
• FW Font width in 1/1440 inch units
If a GRID is specified in bytes 5-12, the entry is requesting the activation of a coded font and assigning
a HAID to it. The printer uses the information provided in the GRID to locate the component parts of the
coded font. First, the GCSGID and FGID values are used to find the font character set, and GCSGID
and CPGID are used to find the code page. In some cases, the printer will locate the code page using
just the CPGID value. If the character set and code page are not found in the above manner, information
in the GRID will be used together with the Font Inline Sequence value (Bytes 3-4) to locate a single-byte
fully described font and font index.
The set of supported GCSGID/CPGID/FGID/FW (GRID) combinations (described in "Code Page and
Font Identification", IPDS Technical Reference 1) is available to the host PSF by means of the XOA-RRL
command. For typographic and scalable fonts, a Font Width (FW) must be specified in order to uniquely
select a point size, unless FW=0 or X'FFFF', in which case the printer's control panel [Characters Per
Inch] setting is used ([Characters Per Inch] on the IPDS Menu).
Exception X'021D..02' is reported back if a non-zero GRID is requested with parts that are not
supported in the printer, except in the case of GCSGID subset substitution or LFE Bold Attribute
substitution.
For outline coded fonts, the FW value is used to derive a scale factor as follows:
• For typographic and proportionally spaced fonts, both horizontal and vertical scale factors are 3
(FW).
• For fixed pitch, uniform character increment fonts, both horizontal and vertical scale factors are
derived using the following algorithm (fractions are truncated):
V_Scale = H_Scale = 1000
*1
FW/SPACE
In this case SPACE is the value of the Space Character increment in relative units.
*1
4028-type font substitution is provided as the printer's control panel feature. It is independent of the device
emulation mode setting (native or 4028). Default is No Font Substitution.
Load Font Equivalence
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