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Re: [Qemu-devel] [PATCH] Add QEMU DirectFB display driver


From: malc
Subject: Re: [Qemu-devel] [PATCH] Add QEMU DirectFB display driver
Date: Tue, 18 May 2010 01:35:46 +0400 (MSD)
User-agent: Alpine 2.00 (LNX 1167 2008-08-23)

On Mon, 17 May 2010, Anthony Liguori wrote:

> On 05/17/2010 03:20 PM, Gerd Hoffmann wrote:
> > On 05/16/10 03:10, Paul Brook wrote:
> > > > The other solution would be to use the DirectFB driver for SDL which
> > > > would allow to do slightly the same as this patch. But that would mean
> > > > having to deal with an additional layer in the graphical stack, which is
> > > > not exactly what one wants from a performance or a complexity point of
> > > > view.
> > > 
> > > I don't buy your complexity argument.  Doesn't DirectFB-via-SDL already
> > > work?
> > 
> > Run a guest.  Switch to another (host) virtual terminal.  Watch qemu
> > continue drawing on the framebuffer.  Doesn't count as "working" in my book.
> 
> A common theme with SDL seems to be that it does lots of things poorly.  I
> wonder if we'd be better suited just dropping SDL and focusing on doing a few
> things well.

There's one thing that SDL does marvelously well - it's just one fairly
small and self contained library that doesn't unleash dependency hell on
the user.

> The fact that we have cocoa support in the tree is basically an admission of
> failure with SDL.

I don't think so, the way i see it: someone had an itch (i.e. an
application that does not integrate well with his windowing environment)
and he scratched it.

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