Re: Performer callback before swapbuffer?

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Steve Baker (sbaker++at++link.com)
Thu, 16 Oct 1997 11:07:25 -0500 (CDT)

On Wed, 15 Oct 1997, Ken Harris wrote:

>
> Is it possible for Performer to make a callback
> before the glXSwapBuffers call?
>
> I need to do a glReadPixels or glCopyPixels, and I'd
> like to do it before the glXSwapBuffers.

Yep - just register your function with:

   pfPipeSwapFunc ( pfPipe *, your_function ) ;

Don't forget to call pfSwapPWinBuffers() inside your callback.

Your code should have the form:-

void my_PipeSwapFunc ( pfPipe *pp, pfPipeWindow *pw )
{
  ...
  pfSwapPWinBuffers ( pw ) ;
  ...
}

Steve Baker 817-619-8776 (Vox/Vox-Mail)
Hughes Training Inc. 817-619-4028 (Fax)
2200 Arlington Downs Road SBaker++at++link.com (eMail)
Arlington, Texas. TX 76005-6171 SJBaker1++at++airmail.net (Personal eMail)
http://www.hti.com http://web2.airmail.net/sjbaker1 (personal)

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