Re: Fix (device interface) : Provide an access to image data filter for devices.
"Igor V. Melichev" <[email protected]> Tue, 30 Dec 2008 13:45:23 +0300
| Newsgroups | gmane.comp.printing.ghostscript.patches |
|---|---|
| Message-ID | <[email protected]> |
Ray, Thanks for information, I'll account it. Igor. ----- Original Message ----- From: "Ray Johnston" <[email protected]> To: "Igor V. Melichev" <[email protected]> Cc: "'tech'" <[email protected]>; <[email protected]> Sent: Monday, December 29, 2008 7:35 PM Subject: Re: Fix (device interface) : Provide an access to image data filter for devices. xefitra > Igor, > > Our code base does not include a GPL JBIG2 encoder -- it is only > supported with the optional (extra license cost) Luratech JBIG2 > module. > > I think that for monochrome images, CCITT-G4 is MUCH faster than > JBIG2, even when using the optional Luratech encoder. While > JBIG2 compression can be superior to G4, I think we can get by > with G4 and avoid the performance penalty and the requirement > for the Luratech JBIG2 encoder. > > Regards, > Ray > ------------------------------------------------------------------------ > > Igor V. Melichev wrote: >> For doing that the clist writer needs to know >> whether the image should be packed with a DCT, Flate or JBig2 filter. > > >