[PATCH] Revert "glamor: Fix coordinates handling for composite source/mask pictures"

[Keith Packard]

Michel Dänzer <michel at daenzer.net> writes:

> After several complaints about this revert from users of other DEs
> (because it broke their systray icons again), I tried to reproduce the
> kwin problem shown on
> http://markus.members.selfnet.de/xorg/glamor_kwin.png without the revert
> again, but couldn't. Markus, can you still reproduce this problem
> without the revert? If yes, please provide detailed instructions to
> reproduce. If not, it was probably fixed by something else in the meantime.

I think I understand the code and now believe that both the original
fixed versions are incorrect. However, I cannot reproduce any of the
problems we've had reported. I've placed an explanation of the bug and
the fix in the patch attached here. In theory, this should fix *both*
the original kwin problem and the systray icons. I would love to see
this tested soon if possible. I wouldn't mind slipping this into 1.16;
it seems "low risk" to me, and solves a fairly serious regression with
glamor.

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-- 
keith.packard at intel.com
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