llvmpipe: add support for nested / overlapping queries

OpenGL doesn't support this but d3d10 does.
It is a bit of a pain as it is necessary to keep track of queries
still active at the end of a scene, which is also why I cheat a bit
and limit the amount of simultaneously active queries to (arbitrary)
16 (simplifies things because don't have to deal with a real list
that way). I can't think of a reason why you'd really want large
numbers of overlapping/nested queries so it is hopefully fine.
(This only affects queries which need to be binned.)

v2: don't copy remainder of array when deleting an entry simply replace
the deleted entry with the last one (order doesn't matter).

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_setup_context.h b/src/gallium/drivers/llvmpipe/lp_setup_context.h
index cc2b973..89c23bb 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_context.h
+++ b/src/gallium/drivers/llvmpipe/lp_setup_context.h
@@ -89,7 +89,8 @@ struct lp_setup_context
    struct lp_scene *scene;               /**< current scene being built */
 
    struct lp_fence *last_fence;
-   struct llvmpipe_query *active_query[PIPE_QUERY_TYPES];
+   struct llvmpipe_query *active_queries[LP_MAX_ACTIVE_BINNED_QUERIES];
+   unsigned active_binned_queries;
 
    boolean subdivide_large_triangles;
    boolean flatshade_first;