Bug 690295

Summary: Color PostScript documents come out monochrome when using mswinpr2
Product: Ghostscript Reporter: James Prolizo <jprolizo>
Component: MS Windows Display DriverAssignee: Default assignee <ghostpdl-bugs>
Status: NOTIFIED FIXED    
Severity: critical    
Priority: P4    
Version: 8.63   
Hardware: PC   
OS: Windows XP   
Customer: Word Size: ---

Description James Prolizo 2009-02-19 12:24:29 UTC 
Color PostScript documents are coming out of the printer as monochrome when
using the mswinpr2 output device to an HP Color LaserJet 3800 PS and a Savin
CLP27DN PS.
Comment 1 Ray Johnston 2009-02-26 09:42:06 UTC 
As discussed on the phone, the problem is that the particular printer driver
that reports BitsPerPixel == 1. Ghostscript thus selects a monochrome (dithered)
device.

The command line option to override the Windows driver setting is
-dBitsPerPixel=24 (for best RGB color). Note that the -dBitsPerPixel=4 will
also product color, but it will be dithered by Ghostscript, so the quality will
be much lower than what the optimized color rendition logic within the printer
can do. The -dBitsPerPixel=8 setting also produces color, but it is still
dithered, just with 2 bits per primary, so it will be better than 4, but not
as good as 24.