COMPRESS_MODE_LJ = 12

Asked by Exeyer

Where can I find any description of COMPRESS_MODE_LJ = 12 (JetReady lossless mode) compression mode?

HPLIP uses HPJetReadyCompress function from lj.so, but it isn't available in source code.

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Aaron Albright (albrigha-deactivatedaccount) said :
#1

We are unable to provide additional details about the algorithms or protocols that are contained in the binary plugin, such as this particular compression algorithm. Hewlett-Packard’s specific stance on this is as follows:

Some HP devices require proprietary software technologies to allow full access to printer features and performance. These technologies cannot be open sourced. Because of this, HP is releasing binary plug-ins that work in conjunction with our Linux Open Source Printing Software to improve the printing experience for HP’s Linux Printing Customers.

These plug-ins are currently designed for use only on 32 and 64-bit, x86-based systems (systems using microprocessors such as Pentium, Celeron or Athlon).

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Exeyer (exeyer) said :
#2

I no need any open source. I need the formal description of this compression method only.
Is there any chance get it or binary plugin for Windows?

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Raghothama Cauligi (raghothama-cauligi) said :
#3

HP's Windows driver includes this. You do not need any additional plugin for Windows.

-----Original Message-----
From: <email address hidden> [mailto:<email address hidden>] On Behalf Of Exeyer
Sent: Thursday, September 18, 2008 1:09 PM
To: Cauligi, Raghothama S
Subject: Re: [Question #45400]: COMPRESS_MODE_LJ = 12

Question #45400 on HPLIP changed:
https://answers.launchpad.net/hplip/+question/45400

    Status: Answered => Open

Exeyer is still having a problem:
I no need any open source. I need the formal description of this compression method only.
Is there any chance get it or binary plugin for Windows?

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You received this question notification because you are a member of HP Linux Imaging and Printing, which is an answer contact for HPLIP.

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Exeyer (exeyer) said :
#4

But I need decompress data for COMPRESS_MODE_LJ .

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Exeyer (exeyer) said :
#5

So is there any description about COMPRESS_MODE_LJ ?

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Aaron Albright (albrigha-deactivatedaccount) said :
#6

Sorry we are unable to provide more information.

Aaron

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