How WINE implements BitBlt function?

[John Found]

On Wed, 04 Feb 2015 12:24:30 +0200
Shachar Shemesh <shachar at shemesh.biz> wrote:

>  
> 
> On 31/01/2015 12:19, Stefan Dösinger wrote: 
> 
> > Am 31.01.2015 um 08:11 schrieb John Found <johnfound at asm32.info>:
> > 
> >> So, the question: How in WINE is implemented BitBlt function in order to have so high performance and so low CPU load?
> > 
> > We use the X render extension. See dlls/winex11.drv/xrender.c.
> > 
> > (I am not an expert on the GDI parts of Wine, so no guarantee for correctness of this information. I haven't followed the full path from gdi's BitBlt to the final X11 call)
> 
> Perhaps using XSHM for such things would be better (at least when the X
> server is local, which is almost always the case). 
> 
> Shachar 
>  

I never heard about XSHM, but it sounds really interesting. 
Unfortunately Google gives some very sketchy references about it. 
Is there more informative documentation about XSHM?


-- 
John Found <johnfound at asm32.info>