Thomas, Well, answer me this one question:
What refresh rates does Windows 2000 allow when you set the Windows color depth to 8 bits? If the answer is that Windows only allows a 60 Hz refresh rate then you have found that your driver only supports a 60 Hz refresh rate when in 8 bit mode. If Windows allows higher refresh rates in 8 bit mode then you have found that DirectDraw )or the DirectDraw drivers for your video card) does not allow a refresh rate higher than 60 Hz. I would believe either of these scenarios, as moving 8 bit colors to the screen requires a table lookup for each pixel to find the associated rgb triple for that pixel. I have no idea how much overhead, if any, that that involves. When you run with 'XWin -engine 1 -fullscreen -depth ?', the '-depth ?' parameter is ignored because the GDI engine just opens a large GDI window that covers the entire desktop. No color depth switching takes place. Thus your discovery that you were actually running at 24 bits per pixel. May I suggest that, if you can set Windows to a display depth of 8 bits with a refresh rate of 75 Hz that you simply do this before and while running XWin and switch back afterwards? I really don't think there is anything that we can do to help you other than this, as DirectDraw is simply not allowing a 75 Hz refresh rate at 8 bits per pixel. Hope that helps, Harold > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of Thomas Chadwick > Sent: Wednesday, April 17, 2002 2:27 PM > To: [EMAIL PROTECTED] > Subject: Re: Curious refresh rate behavior... > > > >From: "Thomas Chadwick" <[EMAIL PROTECTED]> > > [snip] > > >If I do this, I get 75Hz and 8-bit depth, but have to give up the > >DirectDraw > >engine: > > > > XWin -engine 1 -fullscreen -depth 8 > > I take it back. This command-line gives me 75Hz, but not 8-bit > depth (I get > 24-bit). > > > _________________________________________________________________ > Join the world�s largest e-mail service with MSN Hotmail. > http://www.hotmail.com >
