[xorg-bugzilla-noise] [Bug 1077] New: XAA Composite Src copy acceleration

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https://freedesktop.org/bugzilla/show_bug.cgi?id=1077        
   
           Summary: XAA Composite Src copy acceleration
           Product: xorg
           Version: CVS_head
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: critical
          Priority: P2
         Component: DDX/xorg
        AssignedTo: xorg-bugzilla-noise at freedesktop.org
        ReportedBy: anholt at FreeBSD.org


Right now, xcompmgr and automatic update compositing are excruciatingly slow due
to source copies not being supported in XAA.  Attaching a diff to add support
for this using XAAScreenToScreenBitBlt to do the copy.  This brings xcompmgr -c
up to being quite tolerable performance-wise, and plain xcompmgr (and automatic
update as well, probably) is quite nice.        
   
   
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