Re: Picture wobbling

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Rémi Arnaud (remi++at++remi)
Mon, 8 Dec 1997 15:48:34 -0800 (PST)

Angus Dorbie wrote:
>
> On Dec 8, 1:32pm, Gerard R. Tyra wrote:
> > Subject: Re: Picture wobbling
>
> > Okay, correct me if I am wrong
>
> OK, here's the correction.
>
> You call swapbuffers and it simply isn't going to happen until
> everything is drawn so blocking in SW is little difefrent from
> blocking in HW provided the transport delay of a swap call is
> small which it is. The key question is "can I do usefull
> gfx work after my call to swap but before HW swap", the answer
> is no, the pipe blocks almost immediately, hence swapready isn't
> essential.

 Swap Ready becomes mandatory when all the video do not come from the
 same box. It is now working fine, included in the very-soon-to-be-released
 Performer2.2 and does not have the latency that a software lock has that
 can in extreme cases make your software missing frames. It has
 the cost of a cable connecting every pipe SwapReady to each other, but
 will work in any pfPhase modes.
 Note that SwapReady is useless if you do not genlock the videos.

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