[RFC] swap complete event handling fixes

[Ian Romanick]

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On 05/03/2011 10:59 AM, Jesse Barnes wrote:
> Ended up moving over to generic events since the GLX type code is part
> of the GLX namespace and larger than 8 bits.
> 
> Apparently no one had ever tried ChangeDrawableAttributes with indirect
> clients, because simply going a glXSelectEvent causes a crash in that
> case.  So this patch set includes a fix for that issue and has been
> tested with both direct and indirect clients, both with and without
> client and server support.
> 
> New clients with old servers should get a 0 sbc rather than garbage.
> New servers will send old clients a 0 sbc, but the clients will still
> copy garbage into the event actually sent to clients.  New servers with
> new clients should work both in the direct and indirect cases and get
> whatever values the server sends for each field.
> 
> As always, testing and review appreciated.  Piglit's glx-swap-event case
> now checks for swap count sanity (i.e. increasing, nonzero value) and
> allows you to dump the current values in verbose mode.  I also added a
> few more return value checks to the test.

I assume there will also be updates to the GLX_INTEL_swap_event
extension spec?
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