[PD] netsending pixes

chris clepper cgclepper at gmail.com
Fri Apr 11 16:33:16 CEST 2008

On Fri, Apr 11, 2008 at 6:17 AM, Claude Heiland-Allen <
claudiusmaximus at goto10.org> wrote:

> And in my experience with oldish AGP graphics cards, GPU->CPU image
> copying is rather slow.  PCIe may be better, I don't know.

PCIe is not really better.  With GEM we can't use the asynchronous fast
paths since the typical method is to read a fully rendered frame.  Someone
could look into using FBOs and async read back.

> I don't know if there is any way to share GPU memory between independent
> processes on the same machine, would be cool.

You could try to grab screen coordinates other than the active window.  On
OSX 10.5 there is supposedly a flag that makes your context 'read only'
which allows other apps to scrape the contents into a texture.

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