[PATCH 00/11] Misc window exposure/validation cleanups

[Keith Packard]

Adam Jackson <ajax at redhat.com> writes:

> In attempting to get the Always mode of backing store working again, I
> felt the urge to clean the place up a bit.  The most notable change here
> is removing the (questionable) optimization from exposure event generation
> to emit a bounding-box event when faced with more than 25 rects in the
> exposed region.  Given that toolkits already coalesce consecutive expose
> boxes, and that you'll never hit it in a composited environment anyway,
> the complexity doesn't seem justified.

This was written to address shaped windows, which can still generate a
large number of rectangles, even in a composited environment. I think
xeyes was the original test case; a full-screen xeyes window has a
couple thousand rectangles, or about 64kB of data.

I suspect an xeyes-specific optimization is not all that useful to keep
around, but I fear that some user somewhere is taking advantage of this...

-- 
keith.packard at intel.com
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