Re: [info-performer] quickly reading pixels from framebuffer

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From: Andrew James STEWART (stewaj++at++students.cs.mu.OZ.AU)
Date: 10/17/2002 19:15:46

unfortunately, as far as i know glReadPixels is it. I have to use it as
well in a project im working on to extract statistics in the scene based
on pixel depths so im extracting the framebuffer and the depthbuffer and
yes, the performance hit isnt nice :(

Andrew Stewart
340 Team S Project Manager
---------------
0402 015 225

On Thu, 17 Oct 2002, ken sartor wrote:

>
> pfHi -
>
> Does anyone have a suggestion on how one might read pixels from the
> framebuffer during a realtime simulation? When i merely read the pixels,
> my simulation slows down more that an order of magnitude! Is there some
> more efficient way to accomplish this (i am using glReadPixels currently)?
> Or perhaps a hardware solution?
>
> TIA.
>
> ken
>
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