RE: Multi monitor XP, different color depths lead to grey scale variation

Look it up on the web, it’s a TV standard available everywhere.


-----Original Message-----
[]On Behalf Of Rajat Khare
Sent: Tuesday, December 02, 2003 8:03 AM
To: Windows System Software Devs Interest List
Subject: [ntdev] Multi monitor XP, different color depths lead to
greyscale variation

We have written a display driver for an 8 bit greyscale device.
In a multimon system for XP, our display is used along with a display
adapter that has 24 bit color. When an icon is dragged over the greyscale
monitor, the background color(greyscale) changes. This new color is always
a number of the form (n%8) = 4, nearest to the original color/greyscale.

How can we handle the translation of olors from 24 bit depth to 8 bit in
the display driver?

Please reply on

Questions? First check the Kernel Driver FAQ at

You are currently subscribed to ntdev as:
To unsubscribe send a blank email to

The contents of this e-mail are intended for the named addressee only. It
contains information that may be confidential. Unless you are the named
addressee or an authorized designee, you may not copy or use it, or disclose
it to anyone else. If you received it in error please notify us immediately
and then destroy it.