[Bug 21515] VENDOR_WINE vs VENDOR_ATI with xf86-video-ati

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=21515





--- Comment #103 from Stefan Dösinger <stefandoesinger at gmx.at>  2010-03-03 14:02:35 ---
> That probably significantly affects performance since
> the application likely wouldn't attempt to load textures and 3D data into video
> memory as a result, causing them to be loaded more slowly from main memory
> instead.
Reporting too little video memory is unlikely to impact performance negatively
since the location of the texture is entirely up to opengl. We don't claim
support for texturing from system memory(since windows drivers can't do that
either), and even if we did opengl would still do optimizations behind our
back.

What it usually does is make the app tell you that you have to get a better
video card because it *thinks* it can't run. Or the app might cut back graphics
quality.

The only case where a wrong vidmem value negatively affected performance was
when we reported too much vidmem. The app tried to use more textures than the
card could hold, resulting in constant purging and reloading textures by the
driver.

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