Re: [Qemu-devel] [PATCH] opengl rendering in the sdl window

[Daniel P. Berrange]

On Fri, Sep 05, 2008 at 05:44:55PM +0100, Stefano Stabellini wrote:
> Jamie Lokier wrote:
> > Another way to map guest framebuffer to video memory is the XF86DGA
> > extension, which is great when you can use it.  I think VMware uses it
> > in full-screen mode.
> 
> I went with OpenGL because I wanted the accelerated window resize
> feature, and because I think it will give us more opportunities for
> further improvements (for example using PBOs as soon as they are
> supported by at least one open source graphic card driver).

The problem with OpenGL is that it has horrible rendering issues if you
are also using a compositing window manager like Compiz. You need an X
server & driver which supports Redirected Direct Rendering [1]. No distro 
currently has any official support for this yet. AFAIK, the next Fedora 10
will be the first to support it, and even then only on Intel hardware[2].
ATI is still a fair way off, and NVidia support is nowhere to be seen. For
accelerated resize of windows though you shouldn't need 3d - the graphics
driver 2-d hardware acceleration  support ought to be sufficient I'd
imagine

Regards,
Daniel

[1] http://hoegsberg.blogspot.com/2007/08/redirected-direct-rendering.html
[2] 
http://hoegsberg.blogspot.com/2008/03/i-just-committed-last-bit-of-dri2-work.html
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