Michel Dänzer 268e227ba0 EXA: Make Prepare/FinishAccess tracking resilient to repeated / nested calls.
Use reference counting and do nothing unless the reference count transitions
to/from 0.

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=22822 .

As a bonus, this avoids calling the driver Prepare/FinishAccess hooks more than
once per pixmap and operation.

Also update the Doxygen documentation for the PrepareAccess driver hook to
better match current reality.
2009-07-21 14:34:13 +02:00
2009-07-17 14:57:50 -04:00
2009-07-07 17:36:24 -07:00
2009-07-15 17:00:05 +10:00
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