[Mesa-dev] [Bug 55998] Pretty huge slowdown in mesa 9.0

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Oct 30 13:07:13 PDT 2012


--- Comment #24 from Rune Petersen <rune at megahurts.dk> ---
> The algorithm that chooses the FBConfig doesn't check the values of
> GLX_SAMPLES and GLX_SAMPLE_BUFFERS, so I guess it ends up picking an MSAA
> config purely by accident. That's something we'll have to fix in KWin.
> But unfortunately that also means that there is no way to enable or disable
> the use of MSAA right now.

Usually implementations choose the first config that matches its main criteria
(just alpha, red, green, and blue for basic apps)

Are the MSAA configs at the top of the list?

The spec. has ordering rules for each attribute and the order for EGL_SAMPLES
is accending...

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