How WINE implements BitBlt function?

Shachar Shemesh shachar at
Wed Feb 4 04:24:30 CST 2015


On 31/01/2015 12:19, Stefan Dösinger wrote: 

> Am 31.01.2015 um 08:11 schrieb John Found <johnfound at>:
>> 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). 

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