How many framebuffers does openmoko has?

[Carsten Haitzler (The Rasterman)]

On Thu, 8 May 2008 14:20:28 +0530 "Vishwas P S" <vishwas.ps at gmail.com> babbled:

> OK. In that case how do we prevent tearing of images on the screen ? i.e.
> how do we implement a tearing-less display solution ?
> Normally as far as I know, /dev/fb's memory would be mapped to apps and
> there is no way for the driver to sync memory updates with Vsync ... Pl
> correct me if I'm wrong

use xv... and pray. :)

> - Vishwas
> 
> 
> On 5/8/08, The Rasterman Carsten Haitzler <raster at openmoko.org> wrote:
> >
> > On Thu, 8 May 2008 13:16:37 +0530 "Vishwas P S" <vishwas.ps at gmail.com>
> > babbled:
> >
> > > Can the display/video card recognize two planes (a BG and an FG) .. If
> > yes,
> > > it would be very easy to overlay one (FG )onto the other and the
> > app/driver
> > > generating the video(FG) data need not worry abt graphics FB and
> > delegate
> > > the job of combining to the hardware ?
> > >
> > > Is this a possibility on the Glamo ?
> >
> > no.
> >
> > > - Vishwas
> > > (Am sorry if this is an irrelavent question ... i've seen this on the
> > > Freescale chipset that i work on .. so am just curious to know if this
> > is a
> > > possibility)
> > >
> > >
> > > On 5/8/08, The Rasterman Carsten Haitzler <raster at openmoko.org> wrote:
> > > >
> > > > On Thu, 8 May 2008 11:04:37 +0800 "Bin Chen" <binary.chen at gmail.com>
> > > > babbled:
> > > >
> > > > > Hi,
> > > > >
> > > > > I just take a look at media player source code, seems the mplayer
> > use
> > > > > the fbdev directly instead of X. So I think there are two fbdev in
> > > > > system? One for X the other for mplayer?
> > > >
> > > > nup. there can be only one. (yes - bad quote...) :) yes. they will
> > > > conflict. if
> > > > both draw at once... you will get artifacts.
> > > >
> > > > > Otherwise it will conflict.
> > > > >
> > > > > Thanks.
> > > > > Bin
> > > > >
> > > > > _______________________________________________
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> > > >
> > > >
> > > > --
> > > > Carsten Haitzler (The Rasterman) <raster at openmoko.org>
> > > >
> > > > _______________________________________________
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> > > > community at lists.openmoko.org
> > > > http://lists.openmoko.org/mailman/listinfo/community
> > > >
> > >
> >
> >
> > --
> > Carsten Haitzler (The Rasterman) <raster at openmoko.org>
> >
> 


-- 
Carsten Haitzler (The Rasterman) <raster at openmoko.org>