[cups.development] Duplex and Tumble issue, bad colors

[Michael Sweet]

Aurélien Croc wrote:
> Hi, 
> I'm the main developer of the QPDL (SPL2, SPLc) driver (for most of the 
> Samsung ans several Xerox and Dell printers).
> 
> I recently added the support of the color printers. To do my job, i use this 
> configuration:
> *ColorModel CMYK/Color: "<</cupsColorSpace 6/cupsColorOrder 1/cupsCompression 
> 17>>setpagedevice"
> 
> This QPDL language is just a compressed bitmap language. Some of the users 
> report to me some troubles with colours in particular during the print of 
> pictures.
> I'm pretty sure that there is some troubles during the conversion of colours 
> with ghostscript..

If you don't set the cupsBitsPerColor attribute and do the dithering
yourself, you'll be left with the default Ghostscript dithering support
(not particularly nice for color printers... :)

> Another important thing is about the Duplex and Tumble support. I use 
> the "Duplex normal" comand in the driver file which generate a good code for 
> Duplex support in PPD files. Unfortunately, the fields Duplex and Tumble in 
> the raster header are always set to 0...
> I don't understand what's wrong with it.

If you can post a URL to a sample PPD file, we can take a look at the
duplex option code to see why it isn't turning the duplex support on...

-- 
______________________________________________________________________
Michael Sweet, Easy Software Products           mike at easysw dot com
Internet Printing and Publishing Software        http://www.easysw.com