Re: [Gnash-dev] cairo instead of agg for fb?

[Bastiaan Jacques]

Why would Gnash be faster than Cairo at tesselation?

Anyway, the way I see it, the Cairo renderer originally left tesselation
to Gnash; now this task is done by Cairo.

Bastiaan

On Wed, 9 Sep 2009, Timothy Lee wrote:

> Dear all,
>
> I was the one who initially wrote the Cairo rendering backend.  It currently 
> relies on Cairo to perform tessellation.  Speed could be improved by feeding 
> polygons directly to Cairo.
>
> Regards,
> Timothy Lee
>
> On 09/08/2009 11:28 PM, Leon Woestenberg wrote:
> > Hello Udo,
> >
> > thanks for replying and your work on AGG and FB in Gnash!
> >
> > On Tue, Sep 8, 2009 at 9:32 AM, Udo Giacomozzi<address@hidden> 
> > wrote:
> > > Monday, September 7, 2009, 10:36:49 PM, you wrote:
> > > LW>  what is needed to support cairo (with it's image surface) for the
> > > LW>  framebuffer UI?
> > >
> > > LW>  Currently only agg is supported. Cairo / pixman recently got good ARM
> > > LW>  NEON optimizations that are worth exploring.
> > >
> > > I wrote the AGG and FB part of Gnash, but don't know much about Cairo.
> > > However, as long as Cairo can provide a linear buffer that can be
> > > copied directly to graphics memory, it should not be a big deal. There
> > Yes, that's no problem with cairo.
> >
> > > are various pixel formats and -depths around, so Cairo must support
> > > all of these directly - otherwise you will loose a lot of performance
> > > just for converting pixels.
> > >
> > > The ARM NEON feature sounds very interesting. AGG (the library itself,
> > > not the Gnash GUI) could certainly be optimized to use these features,
> > > so maybe you might invest some time there...
> > I would rather spend time on enabling cairo in the fb mode, so that we
> > get the NEON optimizations for free.
> >
> > Note however that Cairo may be a tad slower to begin with, so it has
> > to overtake the agg performance.
> >
> > Regards,
>
>
>
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