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List:       xfree-xpert
Subject:    Re: [Xpert]Vertical retrace and Pixmaps
From:       Mark Vojkovich <MVojkovich () nvidia ! com>
Date:       2002-10-31 21:08:56
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On Thu, 31 Oct 2002 gtg506i@mail.gatech.edu wrote:

> Hi,
> 
> I am a student working on X am i am pretty new to it.
> I have a few questions
> 
> 1. Is there any way to detect vertical retrace in X so that the tearing down of
> he image can be prevented ? 

   You mean for XPutImage or something?  No.
The only things that can sync to the retrace are some X-Video extension
implementations and some OpenGL implementations.

> 
> 2.If both the Xserver and the client are on the same machine then which one
> gives better performance ie in terms of speed ...Pixmaps or shared memory
> pixmaps.Are pixmaps stored directly in the video RAM?????

   That's too open-ended to answer.  It all depends what you are
trying to do.


			MArk.
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