[Bug 71260] SNA in zaphod mode (multiple screens) has rendering issues with Xnest

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71260

--- Comment #28 from intelgraphics7 at gmx-topmail.de ---
I'm still trying to track down the issue about the xfce-terminal in Xnest when
moving another window across it.

Currently I'm in sna_blt_copy_boxes() since it seems that this is the function
that does the fill in xfce-terminal. So my suspicion at the moment is that the
driver optimizes fills by filling a small offscreen tile with the desired
colour or pattern and then copies the tile to the target x/y on the screen as
many times as needed to fill the desired area.
Is that the case? If so, it seems to me that the offscreen tile might get
corrupted from time to time ... or maybe only the src_pitch is not correct for
some reasons.

Does anything I've said makes sense to you?

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