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 <[email protected]>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_context.h b/src/gallium/drivers/llvmpipe/lp_context.h
index ab520019f82..9495e42feee 100644
--- a/src/gallium/drivers/llvmpipe/lp_context.h
+++ b/src/gallium/drivers/llvmpipe/lp_context.h
@@ -97,9 +97,9 @@ struct llvmpipe_context {
    struct pipe_query_data_pipeline_statistics pipeline_statistics;
    unsigned active_statistics_queries;
 
-   unsigned dirty; /**< Mask of LP_NEW_x flags */
+   unsigned active_occlusion_queries;
 
-   unsigned active_occlusion_query;
+   unsigned dirty; /**< Mask of LP_NEW_x flags */
 
    /** Mapped vertex buffers */
    ubyte *mapped_vbuffer[PIPE_MAX_ATTRIBS];