HP L 5 manual Select Palette Command, ?&p#S

Management by ID allows applications to tag data, have multiple raster configurations, and have palettes for different color spaces—all without reconfiguring the active palette. For example, one palette can be created for PCL text, one for HP-GL/2 primitives, one for simple raster, and one for 24-bit raster. The application can then switch between palettes according to what is being sent to the printer.

Selecting a new active palette changes the PCL graphics state. Besides the color entries, a palette also has the graphics state which contains the color space, color treatment, and render algorithm. This ensures that the same color specification in a given palette will always produce the same printed color.

As described below, the Select Palette (?&p#S), Palette Control

(?&p#C), and Palette Control ID (?&p#I) commands implement the three basic operations of management by ID.

•Selection of the active palette

•Deletion of palettes

•Copying of palettes

Select Palette Command

The Select Palette command selects a new active palette by specifying an ID number. The previously active palette is unchanged.

?&p#S

#= Palette ID number

Default	=	0
Range	=	0 to 32767 (command is ignored for out- of-range
		values)

This command activates the designated palette in the palette store. The command is ignored if the specified ID matches the active palette's ID, or if no palette with that ID exists. The designated ID is saved as the palette select ID for the duration of the print job, or until another Select Palette command is received.

This command can be used to de-select the active palette and select as the new active palette a palette created by the Palette Control command (?&p#C). For example, to copy the active palette to an ID of 44 and select the new palette to use or modify, send ?&p44i6c44S.

3-6 Using Palettes EN