Re: [Qemu-devel] [PATCH] OSX x86_64 host support

[Mike Kronenberg]

Hi from Q,

Yes we have a OpenGL, CG and in dev a Core Animation version for vga  
output.
Quickdraw is depreciated since Tiger. But as QEMU has never added gcc4  
to the tool-chain, there was never a official running version on any  
Intel machine :)

Our OpenGL and CG  implementation offer fullscreen and tablet support  
as-well.
Fullscreen is very slow on the CG implementation, but was speeded up  
by Core-Animation.

I'd going with the OpenGL implementation, if the "true" opengl  
implementation for QEMU was coming ;).
Else the partial screen-redrawing of CG is faster than OpenGL.

On the other hand, the QT implementation is and remains the fastest  
solution, as no of the other allows directly accessing the video- 
buffer, which results in way more copying.

If there is need for back-porting any of this stuff, that would be no  
problem.

For the new Q front-end, we are going with a CG approach only, but we  
bypass cocoa.m altogether and mmap (shmem allows only 4mb on OS X)  
everything to the viewer app.

Mike


On 07.12.2007, at 21:19, Andreas Färber wrote:

> Am 07.12.2007 um 21:12 schrieb Alexander Graf:
>
> > On Dec 7, 2007, at 6:43 PM, Pierre d'Herbemont wrote:
> >
> > > On Dec 7, 2007, at 1:42 PM, Alexander Graf wrote:
> > >
> > > > Right now there is no graphical output available except for VNC,  
> > > > as the cocoa output depends on deprecated APIs that are no longer  
> > > > available in 64-bit mode and SDL does not compile on x86_64  
> > > > Darwin yet.
> > >
> > > This is the QuickDraw API? If so, it should be quite straight  
> > > forward to use OpenGL or CoreGraphics instead...
> > > What about not disabling Cocoa, and simply print a nice #error or  
> > > #warning that explains that the quickdraw part needs fixing?
> > >
> > > Pierre.
> >
> >
> > Yes, it's the QuickDraw API. I'm currently looking into this, so if  
> > you know anything about the transition to CoreGraphics, please let  
> > me know or point me to some documentation on that.
> >
> > I'd rather have a proper patch for the cocoa output than anything  
> > else. Disabling it is only a temporary workaround to have it build  
> > at all.
>
> Doesn't Q offer all three? I'm pretty sure I've been using its  
> OpenGL option with success.
>
> Andreas
>
> > Cheers,
> >
> > Alex

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