Xerox FreeFlow User Manual - page 39

Run Time Considerations

Xerox FreeFlow® Print Server

IBM® IPDS User Guide

4-7

Although the Destination Profile selection on the Color Management dialog does not provide a Use 

Embedded Profile checkbox, embedded destination profiles provided by the IPDS host in Instruction 

CMRs can still be used. To ensure that Instruction CMRs from the host, rather than Xerox FreeFlow® 

Print Server ICC Profile settings, are used to select the destination ICC profile, place the override lock 

above the Destination Profile selection on the Color Management dialog in the unlocked position. Set 

the override lock to the Locked position when it is necessary to use the destination profile provided in 

the Color Management dialog, rather than embedded profiles from Instruction CMRs embedded in the 

data stream.

Note 

AFP Color Management supports spot color by means of the Indexed CMR; however, this 

CMR type is not yet supported in this release of Xerox FreeFlow® Print Server. Therefore, the Spot 

Color Processing radio button on the Spot tab of the Color Management dialog is not currently 

meaningful for IPDS.

Tone Transfer Curves and User TRCs

ACMA Tone Transfer Curves (TTCs) are similar to Xerox FreeFlow® Print Server Tone Reproduction 

Curves (TRCs). However, ACMA Audit TTC CMRs are applied during decomposition, while Xerox 

FreeFlow® Print Server User TRCs are processed post RIP. ACMA Instruction TTC CMRs, which would be 

processed post RIP, are not supported at this time.

Reprofiling in an IPDS Environment

If you update a Destination ICC Profile on the FreeFlow Print Server to account for characteristics of a 

specific system, its content will no longer match the content of the Instruction CMR used by IPDS 

applications to deliver the destination profile. If you are using a host application that does not switch 

destination profiles, that is, does not use Instruction Color Conversion CMRs, it is acceptable to set the 

Queue Destination profile to an override This ensures that the updated value is used, rather than the 

CMR. However, if the application requires switching among destination profiles, it is necessary to 

update the definition of the CMR used by the host. This can be done by using the IBM Resource 

Installer utility to create a new version of the CMR, from a copy of the updated ICC profile, and install 

it on the IPDS host. The reprofiled CMR can then be used by the application to supply correct profile 

values.

Accepting Print Jobs from Multiple Hosts

In general, IPDS sessions begin with the first IPDS command that an IPDS device receives and end 

when either an IPDS command explicitly ends the session or when the carrying-protocol session ends. 

Some IPDS printers support an optional command, called Manage IPDS Dialog (MID) that can 

explicitly start or stop an IPDS dialog. This command allows an IPDS printer to be shared by multiple 

hosts by allowing it to conveniently switch between multiple communication sessions. There can be 

multiple independent sessions, each with an IPDS dialog. When a printer receives a Manage IPDS 

Dialog command to end a session, the printer can then safely switch to a different session.