You can get the server to render to a system memory buffer
using the shadowfb. Many drivers support an Option "ShadowFB"
where rendering happens to system memory and then the driver
periodically flushes the system memory framebuffer to the
real framebuffer. So you may be able to use this system memory
shadow buffer as a stream for your adaptor.
Mark.
On Sat, 8 Oct 2005, Victor Demchenko wrote:
> Hello
>
> I want to use some device, that is not a video adaptor, as output for
> XFree86 server. This device receives the 24 bit RGB frames (pictures) as
> byte stream with finish flag at the end of each one and don't know
> anything about some kind of timings etc. The speed of output is about 25
> fps.
> Is it possible to use this device with XFree86 at all? I trying to
> write a test XFree86 driver for this purpose and hasn't found how to
> get the screen picture to send it to my device. Is it true, that only Xv
> extension allows to control the output of completed frames by the
> adaptor->PutImage() routine? And actually even video players like
> MPlayer or Xine, when using Xv, attempting to call XvShmPutImage()
> (that, as I know, cannot be handled by my driver) instead of
> XvPutImage().
> I need at least to output the video by some player. But it
> will be wonderful if I can to use this device as usual monitor to output
> any of the X applications.
>
> Thank you.
>
> ---
> br
> Victor
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