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PCL Imaging Mode PCL Imaging Mode, enabled by the Configure Image Data
command (?*v#W), allows a maximum of 24 bits per pixel
for color specification. Therefore, more colors (produced by
halftoning) may be specified than are obtainable in Simple
Color Mode. In the PCL Imaging Mode, pixel encoding
mode, bits per pixel, bits per primary, white/black
references, and the color palette are all programmable.
HP-GL/2 Imaging
Mode
In HP-GL/2, the Initialize (IN) command starts color
imaging and performs the following:
Sets the pixel encoding mode to index by plane.
Sets bits per index to 3.
Creates an 8-pen palette that is reprogrammable in
either PCL or HP-GL/2 contexts (see Chapter 3, “Using
Palettes,” for more information).
Although default HP-GL/2 palettes are different than
default PCL palettes, an HP-GL/2 palette is modifiable in
either PCL or HP-GL/2 (using the Assign Color Index
[?*v#I] or Pen Color [PC] commands, respectively).
Likewise, a PCL palette created by the Configure Image
Data command (?*v#W) is modifiable in both PCL and
HP-GL/2 using the same commands.
The active palette is always transferred between HP-GL/2
and PCL contexts. Since only one palette at a time can be
active, a new palette created in either context overwrites
the current palette.
2-2 Using Color Modes2-2 Using Color Modes