HP Pcl 5 Manual

							ENUnderline Command 8-29
Underline Command
The Underline command controls automatic text underlining.
E
C & d # D -   Enable underline 
#  =   0 - Fixed position
    3 - Floating position 
Default =0
Range =0, 3 (values outside range are ignored)
E
C & d @ -   Disable underline
Once underlining is enabled, any positive horizontal movement 
causes an underline to be drawn. Positive horizontal movement 
includes the printing of text and positive horizontal cursor motion.
When fixed position underlining is enabled, the underline is drawn 
five dots below the baseline and is three dots thick. (The baseline is 
the dot row on which all of the characters in a given line appear to 
stand, see Chapter 11.) When floating position underline is enabled, 
the underline position is determined by the greatest underline 
distance below the baseline of all of the fonts printed on the current 
line. (The underline distance for a font is defined in the font header, 
see Chapter 11.)
NoteThe underline and the underscore character may not necessarily be 
aligned or be the same thickness. 
						

							8-30   PCL Font SelectionEN 
						

							ENIntroduction  9-1
9
Font Management
Introduction 
Font management provides mechanisms for manipulating soft 
fonts. It provides the means for controlling which soft fonts are 
saved in user memory (RAM) or deleted. This is accomplished by 
assigning a font as either temporary or permanent, or deleting a 
soft font. In addition, font management includes the command 
for assigning ID numbers to RAM fonts. It also provides a 
mechanism for copying ROM fonts (internal, car tridge, or SIMM) 
to RAM for the purpose of assigning ID numbers. 
						

							9-2   Font ManagementEN
Downloading Soft Fonts 
The process of transferring soft fonts from a host computer to the 
printer’s user memory (RAM) is called downloading. Designate a 
unique identification (ID) number prior to the download of a font. This 
number is then associated with the soft font. This number is assigned 
using the Font ID command, described later in this chapter. 
Subsequent manipulation of the soft font is accomplished using the 
font’s ID number. If a font is already associated with this ID number in 
the printer, the existing font is deleted during the download.
Several commands are required to define a font before downloading it 
to the printer. These commands are described in detail in Chapter 11. 
Hewlett-Packard font files include the necessary commands that 
define the symbols of a font. Assigning a font ID number and then 
copying the font file to the printer downloads the font. Scalable fonts 
and typefaces may be prepared by font management software such 
as HP’s Type Director. Once prepared, scalable fonts are downloaded 
in much the same manner as bitmap fonts.
Once downloaded, a soft font occupies a portion of user memory 
(RAM). The number of soft fonts that can be stored in user memory is 
limited only by the amount of available user memory. 
						

							ENTemporary vs. Permanent Fonts 9-3
Temporary vs. Permanent Fonts 
Once downloaded, a font is automatically designated as temporary. A 
temporary soft font is deleted from user memory during a printer reset 
or when a Typeface List, a Font Printout or a self-test is performed 
from the printer’s control panel. A soft font can be designated as 
permanent to prevent the printer from deleting it during a printer reset. 
A soft font is designated as temporary or permanent by referencing its 
ID number and using the Font Control command (refer to “Font 
Control Command” later in this chapter).
NoteBoth temporary and permanent fonts are deleted from user memory 
whenever the printer’s power is turned off.
Switching printer languages (“personalities”), changing resolution, or 
changing the Page Protection setting also deletes temporary and 
permanent fonts from user memory in some printers (refer to the 
appropriate printer User’s Manual for specifics).
An existing font is deleted when a new font with the same ID number 
is downloaded. The new font replaces the existing font (whether 
temporary or permanent).
Deleting Fonts 
There are several mechanisms provided by PCL font management 
that delete soft fonts from user memory. These include commands to 
delete all soft fonts, all temporary soft fonts, or an individual soft font 
by reference to its font ID number (refer to the Font ID and the Font 
Control commands described on the following pages). 
						

							9-4   Font ManagementEN
Font ID Command 
The Font ID command is used to specify an ID number for use in 
subsequent font management commands. The ID number of a font 
can be used to select the font for printing (refer to “Font Selection by 
ID” in Chapter 8).
E
C *c#D
#  =   ID number 
Default =0
Range =0 - 32767
The font ID number is used during subsequent soft font downloads, 
selections or deletions.
The factory default font ID is 0 (if no Font ID command is sent, an ID 
of 0 is assigned).
NoteThe font number assigned by the printer and used from the printer’s 
control panel is not the same as the ID number assigned using the 
Font ID Command.
Example
To specify a font ID number of 1, send:
E
C*c1D 
						

							ENFont Control Command 9-5
Font Control Command 
The Font Control command provides mechanisms for manipulating 
soft fonts.
E
C * c # F
#  =  0 - Delete all soft fonts
  1 - Delete all temporary soft fonts
  2 - Delete soft font (last ID specified)
  3 - Delete Character Code (last ID and Character 
  Code specified)
  4 - Make soft font temporary (last ID specified)
  5 - Make soft font permanent (last ID specified)
  6 - Copy/Assign current invoked font as temporary 
  (last ID specified) 
Default =N/A
Range =0 - 6 (values outside range are ignored) 
NoteIf the primary or secondary font is deleted, a new primary or 
secondary font is selected automatically from the remaining fonts.
Examples 
To remove all soft fonts from user memory, send:
E
C *c0F
To remove only those soft fonts that are temporary, send:
E
C *c1F
To delete the soft font with an ID of 1, send:
E
C *c1d2F 
						

							9-6   Font ManagementEN
To delete the character “p” (112 decimal) in a bitmap or bound 
scalable font with an ID of 1, send:
E
C *c1d112e3F
(A space is printed in place of the deleted character. Also, the E
C*c#E 
Character Code command used in the above sequence “...112e...,” is 
described in Chapter 11.) 
To make the soft font with an ID of 2 temporary, send:
E
C *c2d4F
To make the soft font with an ID of 2 permanent, send:
E
C *c2d5F
To make a copy of the currently invoked (selected) font, with an 
ID of 9, send:
E
C *c9d6F
The Copy/Assign font control feature can be used to copy either ROM 
or RAM fonts into RAM assigning them ID numbers. 
NoteWhen the currently selected font is a scalable TrueType ROM font, E
C*c#d6F assigns a font ID number, but makes no copy of the font 
in RAM. Any attempts to download or delete characters within the font 
are ignored. An attempt to delete the font merely results in the loss of 
the ID number. 
						

							ENFont Management Example 9-7
Font Management Example 
This example illustrates several typical font management operations. 
It assumes a bitmap soft font is stored and available on an MS-DOS 
based hard disk.
1Set the font ID number to 2:
E
C*c2D 
2Download a soft font file using the MS-DOS COPY command with 
the /B option:
COPY /B filename PRN
Note that the soft font is associated with font ID 2.
3Make the soft font permanent to prevent its deletion during a 
printer reset:
E
C*c5F
4Designate the permanent soft font as primary:
E
C(2X 
						

							9-8   Font ManagementEN
Unbound Scalable Fonts 
Prior to introduction of the HP LaserJet IIIP printer, a downloaded 
scalable font was restricted to a single symbol set. Now scalable fonts 
with no symbol set affiliation can be downloaded. These new fonts 
are called unbound fonts.
To download unbound fonts, the “PCL Font Header for Intellifont 
Unbound Scalable Fonts” or the “Format 15 Font Header for Scalable 
Fonts” (TrueType) must be used (see Chapter 11).
Bound and Unbound Fonts 
The terms “bound” and “unbound” refer to the symbol set capacity of 
a font. A bound font identifies a font which is restricted (bound) to a 
single symbol set. An unbound font (or unbound typeface) indicates 
the capacity to be bound to a set of symbols selected from a 
complementary symbol index (such as the Master Symbol List 
(MSL), or the Unicode symbol index).
Font Selection and Unbound Fonts  
When a font is requested for printing, the printer selects a font which 
most closely matches the current font selection characteristics 
(symbol set, spacing, pitch, height, style, stroke weight, and 
typeface). Refer to “Summary of Font Selection by Characteristics” in 
Chapter 8 for detailed font characteristic selection information.
Since symbol set is the highest font selection priority and typeface is 
the lowest, the printer searches for the symbol set first. A list of all 
fonts that match the requested symbol set is made. This includes 
bitmap, bound, and unbound fonts. Since bitmap and bound scalable 
fonts contain only one symbol set, they can be easily identified. 
However, determining which unbound fonts match a symbol set is 
more complex. Symbol set compatibility for unbound fonts is 
determined by identification of groups of symbols referred to as 
symbol collections.