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2-2 Using Color Modes EN
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 may be specified than are
obtainable in Simple Color Mode. In the PCL Imaging Mode, pixel
encoding mode, bits per pixel, bits per primary, 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.