Slow emulation of StretchBlt

[Huw Davies]

On Mon, Apr 17, 2017 at 10:05:37PM -0700, Roderick Colenbrander wrote:
> Depending on source, destination format and some other things it may
> get accelerated e.g. by winex11.drv to xrender. Assuming xrender is
> picked, it could be that your drivers are not accelerating this
> situation.

By default this won't happen and the stretching will be done in the
dibdrv.  If you're running with the X11 driver, you could try adding
the registry key

[HKCU\\Software\\Wine\\X11 Driver]
"ClientSideGraphics"="N"

Huw.