[PATCH 00/37] Implement backing store's Always mode

[Adam Jackson]

On Wed, 2014-10-08 at 17:04 +0200, Adam Jackson wrote:

> I'm not in any way convinced this is correct yet, in fact I'm pretty sure
> it's not.  And there's some work that would be nice to follow this with [4].
> But it's close enough that I'd like to get some more eyes on it.

I may have been too modest here.  A backport of this series to 1.13
appears to be correct enough for the customer app that provoked this
work.  Admittedly, all they're doing is creating an unmapped Always
window, drawing into it, and blitting out from it, which means they're
not relying on child clipping of that window to be correct.  Outside of
that the only things I might expect to be broken would be DRI or Present
kinds of things that assume they're only looking at realized windows.

- ajax