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

Am 31.01.2015 um 08:11 schrieb John Found <johnfound@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