[cups.development] Duplex and Tumble issue, bad colors
Michael Sweet
mike at easysw.com
Fri Dec 29 12:23:50 PST 2006
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
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