Implement query object interface.
This replaces the temporary occlusion counter functions we had before.
Added new ctx->Driver.WaitQuery() function which should block until the result is ready.
Sketch out some code for vertex transformation feedback counters.
diff --git a/src/mesa/drivers/common/driverfuncs.c b/src/mesa/drivers/common/driverfuncs.c
index 500dbb2..96e5037 100644
--- a/src/mesa/drivers/common/driverfuncs.c
+++ b/src/mesa/drivers/common/driverfuncs.c
@@ -224,8 +224,9 @@
/* query objects */
driver->NewQueryObject = _mesa_new_query_object;
- driver->BeginQuery = NULL;
- driver->EndQuery = NULL;
+ driver->BeginQuery = _mesa_begin_query;
+ driver->EndQuery = _mesa_end_query;
+ driver->WaitQuery = _mesa_wait_query;
/* APPLE_vertex_array_object */
driver->NewArrayObject = _mesa_new_array_object;