[Bug 56865] Mesa 9.0 extremely slow and produces fading output on radeon Evergreen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56865

--- Comment #19 from Alex Deucher <agd5f at yahoo.com> ---
(In reply to comment #18)
> > As far as I understand, expected usage of MLAA with Mesa is to enable it
> > only for the applications where you want it (games etc) with either
> > app-specific drirc settings or environment variables.
> It is probably so. A **huge** problem for me is a common lack of
> documentation. I'm okay with English and not too lazy to read but I could
> hardly find what to read, though. I mean - relevant while not obsolete.
> Things usually work in default configuration, which may not be optimal for
> some cases, and if I want to do something about it - this is where troubles
> begin - for me and maybe for developers who have to answer my sometimes
> stupid questions. All this video stuff looks so complicated and chaotic for
> me due to lack of documentation... I even did not comprehend if mesa is
> commonly responsible only for 3D rendering how comes erroneously enabled
> MLAA blurs fonts, too. Fonts currently are rendered by DDX driver, aren't
> they?

MLAA affects all rendering that goes through OpenGL.  While the text rendering
for non-GL X apps may be rendered by the ddx using xrendr, the pixmaps end up
going though OpenGL if you are using an OpenGL compositor (gnome
shell/compiz/kwin/etc.).  When the application window is composited to the
front buffer by the OpenGL compositor, the MLAA is applied.

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