[gs-bugs] [Bug 690295] Color PostScript documents come out monochrome when using mswinpr2

bugs.ghostscript.com-bugzilla-daemon at ghostscript.com bugs.ghostscript.com-bugzilla-daemon at ghostscript.com
Thu Feb 26 09:42:06 PST 2009


http://bugs.ghostscript.com/show_bug.cgi?id=690295

ray.johnston at artifex.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED



------- Additional Comments From ray.johnston at artifex.com  2009-02-26 09:42 -------
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.



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