HP Pcl 5 Manual

							ENCommand Sequence 13-5
Command Sequence 
The following illustration shows the Print Model Command Sequence 
for selecting a current pattern and using it to fill a destination image.
Table 13-1
Operation  Comments


Download Page Data  Prior raster and character data  
downloaded to the page is  
considered destination image.


Select Transparency Modes E
C*v#N and/or E
C*v#O
Select Specific Pattern ID  Pattern ID E
C*c#G
and
Select Pattern 
E
C*v#T (redefines current 
pattern)
Download Page Data 
(Source Image data)Raster image/characters
Return to regular print mode  Default current pattern and
 transparency modes: 
E
C*v0T 
(100% black pattern selected) 
and E
C*v0N E
C*v0O 
(transparency modes selected).


Download remaining page data  Transfer data for regular 
printing, or the above process 
may be repeated to produce 
another print model effect. 
						

							13-6   The PCL Print ModelEN
Source Transparency Mode Command 
The Select Source Transparency Mode command sets the source 
image’s transparency mode to transparent or opaque.
E
C * v # N
#  =0 - Transparent
1 - Opaque 
Default =0
Range =0, 1 (other values cause the command to be ignored)
With a transparency mode of “0” (transparent), the white regions 
of the source image are not be copied onto the destination. With a 
transparency mode of “1” (opaque), the white pixels in the source 
are applied directly onto the destination.
Refer to the preceding definitions and the discussion of Figure 13-3 
for an explanation of the effects of transparency.


End of Page Data Table 13-1  (continued) 
						

							ENPattern Transparency Mode Command 13-7
Pattern Transparency Mode Command  
The Pattern Transparency Mode command sets the pattern’s 
transparency mode to transparent or opaque.
E
C * v # O
#  =0 - Transparent
1 - Opaque 
Default =0
Range =0, 1 (other values cause the command to be ignored)
A transparency mode of “0” (transparent) means that the white 
regions of the pattern image are not copied onto the destination. 
A transparency mode of “1” (opaque) means that the white pixels 
in the pattern are applied directly onto the destination.
NoteWhen printing white rules, the pattern transparency is treated as if it 
were “opaque”; white rules erase black rules regardless of the 
transparency mode.
Refer to the preceding definitions and the discussion of Figure 13-3 
and Figure 14-3 for an explanation of the effects of transparency. 
						

							13-8   The PCL Print ModelEN
Pattern ID (Area Fill ID) Command 
The Pattern ID command (formerly called Area Fill ID) identifies the 
specific shading, cross-hatch, or user-defined pattern. (This 
command is also used for rectangular area fill. Refer to Chapter 14, 
PCL Rectangular Area Fill Graphics.)
E
C * c # G
#  =ID number of user-defined pattern
Default =0 (no pattern)
Range =0 - 32767 (values outside the range are ignored)  
For rectangular areas, the pattern material is determined by both the 
pattern ID and the value of the Fill Rectangular Area command. For 
other images, the pattern material is determined by the pattern ID 
and the value of the Select Pattern command.
Figure 13-4 and Figure 13-5 illustrate the HP-defined shading 
patterns and cross-hatched patterns, respectively. Table 13-2
Selecting Shaded patternsSelecting Cross-Hatch 
patterns:
# =   1 thru 2 = 1-2% shade   # =   1 - Pattern #1
   3 thru 10 = 3-10% shade      2 - Pattern #2
   11 thru 20 = 11-20% shade      3 - Pattern #3
   21 thru 35 = 21-35% shade      4 - Pattern #4
   36 thru 55 = 36-55% shade      5 - Pattern #5
   56 thru 80 = 56-80% shade      6 - Pattern #6
   81 thru 99 = 81-99% shade
   100 = 100% shade
 Selecting User-Defined patterns:
1
1. Not supported on all LaserJet family printers. Refer to the “PCL Feature Support 
Matrix” in Chapter 1 of the PCL 5 Comparison Guide for specifics.
     # = ID number of user-defined pattern 
						

							ENPattern ID (Area Fill ID) Command 13-9
NotesThis command is used for both the Select Pattern and Area Fill 
graphics (it is also described in Chapter 14, PCL Rectangular 
Area Fill Graphics). It is duplicated here for convenience. 
For user-defined patterns, this command, sent prior to downloading 
a user-defined pattern, assigns an ID pattern number to the 
downloaded pattern. (For more information, see “User- Defined 
Graphics,” later in this chapter.) 
						

							13-10   The PCL Print ModelEN
Figure 13-4 Shading Patterns  
						

							ENPattern ID (Area Fill ID) Command 13-11 Figure 13-5 Cross-Hatch Patterns    
						

							13-12   The PCL Print ModelEN
Select Current Pattern Command 
The Select Current Pattern command identifies the type of pattern to 
be applied onto the destination.
E
C * v # T 
#  =0 - Solid black (default)
1 - Solid white
2 - Shading pattern
3 - Cross-hatch pattern
4 - User-defined pattern 
Default =0
Range =0 - 4 (values outside of range are ignored)
This command selects which type of pattern is applied. For values 2, 
3, and 4, the shading level (Figure 13-4), cross-hatch pattern (Figure 
13-5), or user-defined pattern number is identified by the Pattern ID 
command described earlier in this chapter.
NotesFor selecting or changing the current pattern, the Select Current 
Pattern (E
C*v#T) and the Pattern ID (E
C*c#G) commands work 
together. Sending the current pattern (Select Current Pattern 
command) alone does not change the current pattern; the Pattern 
ID must be sent first. However, when selecting solid white (white 
rule) or solid black (black rule), only the Select Current Pattern 
command is required.
Once a current pattern is selected, that pattern applies to all images 
placed on the page until a new pattern is selected. 
						

							ENUser-Defined Pattern Graphics 13-13
User-Defined Pattern Graphics
In addition to the eight shading patterns and six cross-hatch patterns, 
users can design their own patterns (area fill). These user-defined 
patterns are downloaded to the printer and controlled using three 
new commands:   
zUser-Defined Pattern  E
C*c#W [data] 
zSet Pattern Reference Point  E
C*p#R 
zPattern Control  E
C*p#Q   >
User-Defined Pattern Implementation
To create a user pattern, a user defines a binary raster data image 
as a base pattern. This base pattern is downloaded to the printer 
using the User-Defined Pattern command. Prior to downloading the 
pattern, a Pattern ID command is sent to assign the user pattern an 
ID number. This ID number is used to select the pattern for printing 
and for pattern management.
To apply the pattern to an image, the printer duplicates or tiles (like 
placing ceramic tiles) the pattern across and down the page. This 
pattern can be applied to any image, or used as rectangular area fill.
Figure 13-6 User-Defined Base Pattern Example
A user-defined pattern may be applied to any image in the same 
manner as the internal (cross-hatch or shade) patterns. 
						

							13-14   The PCL Print ModelEN
Figure 13-7 Pattern Layout Across the Printable Area
Pattern Reference Point   
The pattern reference point is a position on the logical page at which 
the base pattern is positioned for tiling. The upper left corner of the 
base pattern is positioned at this point (see ). The default pattern 
reference point is position 0,0. However, it is possible to set the 
pattern reference point to the current cursor position. This allows 
the pattern to be positioned or adjusted for fill areas. The pattern 
reference point may be shifted more than once for as many fill 
areas as there are on a page (the area must be filled before the 
tile point is moved for the next fill area).
Figure 13-8 shows two areas filled with the pattern reference point 
fixed at the default (0,0) position. The lower portion of the illustration 
shows two areas in which the pattern reference point was moved to 
the upper left corner of each area and the area filled separately.