[Bug 23085] Radeon KMS: XGetImage very slow, as is Firefox scrolling

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sun Aug 2 13:43:10 PDT 2009


--- Comment #8 from Clemens Eisserer <linuxhippy at gmail.com>  2009-08-02 13:43:09 PST ---
> I've heard that Firefox uses XGetImage when rendering "native" widgets, i.e.,
Yes, it has to do this because GTK's theme engine design is badly broken.
The widget is rendered *twice*, one time over a white background, the other
time over a black one and both results are compared in userspace (2x XGetImage)
to get knowledge about trasparent areas.
Hopefully they'll change it to a pure cairo-based interface in GTK3, however as
it seems now there isn't a lot of movement in its development :-/

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