Hello Richard,
Could you please elaborate in more how to use shared memory and pipes etc.
to coordinate multiple DFB processes?
Thank you,
-Pandit
----- Original Message ----
From: Unger Richard <[EMAIL PROTECTED]>
To: Gerd Alber <[EMAIL PROTECTED]>; [email protected]
Sent: Thursday, November 23, 2006 4:26:53 AM
Subject: Re: [directfb-dev] Access more than one FrameBuffer device in
oneprocess
Hi!
Currently, DFB only handles one Framebuffer device.
The best way to solve your problem depends a bit on what you are trying to do.
If you use the three FrameBuffers largely independantly of each other, you may
be able to use multiple DFB processes, and coordinate their activities using
standard techniques (shared memory, pipes, etc).
If the three Framebuffers are to be used in a coordinated way, I think the
problem will be quite difficult. The three framebuffers will each have their
VRAM and timings which would need to be used in a synchronized way to achieve,
for example, smooth motion from one display to another. :-/
Richard Unger
> -----Ursprüngliche Nachricht-----
> Von: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Im Auftrag von Gerd Alber
> Gesendet: Mittwoch, 22. November 2006 19:12
> An: [email protected]
> Betreff: [directfb-dev] Access more than one FrameBuffer
> device in oneprocess
>
> Hi!
>
> I try to access 3 FrameBuffer in one process (application).
> On my powerpc I have three FrameBuffer devices (dev/fb0
> dev/fb1 dev/fb2). Over these I can paint on three LCD
> displays. Every FrameBuffer has on screen and one layer.
> The architecture of DirectFB seems to can handle only with
> one FrameBuffer device per process (only one IDirectFB).
> What is the best way to solve my problem?
>
> - Write a gfxdriver like matrox to access over layers the 3
> FrameBuffer?
> - Try to manage more than one IDirectFB (when it is possible).
>
> Or exist a tool like Xinemara with can do that?
>
> In my final system, I'll be able to develop application with wxWidgets
> (www.wxWidgets.og) which can handle more than one screen over
> the dfb-port.
>
> Sorry for my bad English and
> Thanks for your help
>
> Gerd Alber
>
>
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> [email protected]
> http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-dev
>
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