[Xorg-driver-geode] Glyph rendering

[Huang, FrankR]

Have corrected the quoting format in MS outlook.
Better?


Thanks,
Frank
> -----Original Message-----
> From: Michel Dänzer [mailto:michel at daenzer.net]
> Sent: 2010年7月21日 16:24
> To: Huang, FrankR
> Cc: Mart Raudsepp; Torres, Rigo; Writer, Tim; xorg-devel at lists.x.org;
> xorg-driver-geode at lists.x.org; Cui, Hunk; Deucher, Alexander
> Subject: RE: Glyph rendering
> 
> 
> [ Fixed your quoting, please consider using a better e-mail client ]
> 
> On Mit, 2010-07-21 at 16:11 +0800, Huang, FrankR wrote:
> >
> > From: Michel Dänzer [mailto:michel at daenzer.net]
> >
> > > On Mit, 2010-07-21 at 15:30 +0800, Huang, FrankR wrote:
> > > >
> > > > But as you known, for the PICT_a8r8g8b8 method, the width and height
> > > > of source sometimes can not be divied by 4(such as 5...), so the
> > > > remaining pixel PictOpAdd should be done by SW code.
> > >
> > > The height doesn't matter, and if there's a writemask it should be
> > > possible to use that to mask out source/destination pixels that don't
> > > align to an ARGB pixel.
> >
> > Yes. My description is not accurate, we only care width for this
> > condition. Do you mean the writemask implemented in HW? From what I
> > found, it is not in geode GP. :(
> 
> Yes, that's what I meant.
> 
> 
> > > > For the mixed way(HW+SW as I described above), the speed can be
> > > > 50000/s, unfortunely the result still is not correct(seems correct
> by
> > > > debugging, I'm still checking it).
> > >
> > > Sounds like maybe you're not properly synchronizing between GPU and
> CPU
> > > access.
> >
> > Michael,
> 
> Ahem.
> 
> > maybe you misunderstand. The "SW" I mean is that our driver still use
> > a formula to do the "+" operation in video memory instead of fallback
> > to server handling(may be you means this). We don't fallback anymore.
> 
> I figured that, which means the driver is responsible for making sure
> the GPU and CPU properly see each other's rendering results.
> 
> 
> --
> Earthling Michel Dänzer           |                http://www.vmware.com
> Libre software enthusiast         |          Debian, X and DRI developer