llvmpipe: implement occlusion query

OpenGL occlusion queries work now.  The Mesa demos, glean test and piglit
tests all pass.  A few enhancements are possible in the future. -Brian

Signed-off-by: Brian Paul <brianp@vmware.com>

1 files changed, 22 insertions, 2 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_query.h b/src/gallium/drivers/llvmpipe/lp_query.h
index fa9fcd8713..721c41cb5c 100644
--- a/src/gallium/drivers/llvmpipe/lp_query.h
+++ b/src/gallium/drivers/llvmpipe/lp_query.h
@@ -1,6 +1,7 @@
 /**************************************************************************
  * 
  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * Copyright 2010 VMware, Inc.
  * All Rights Reserved.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -25,14 +26,33 @@
  * 
  **************************************************************************/
 
-/* Author:
- *    Keith Whitwell
+/* Authors:
+ *    Keith Whitwell, Qicheng Christopher Li, Brian Paul
  */
 
 #ifndef LP_QUERY_H
 #define LP_QUERY_H
 
+#include <limits.h>
+#include "os/os_thread.h"
+#include "lp_limits.h"
+
+
 struct llvmpipe_context;
+
+
+struct llvmpipe_query {
+   uint64_t count[LP_MAX_THREADS];  /**< a counter for each thread */
+   uint64_t result;                 /**< total of all counters */
+
+   pipe_mutex mutex;
+   unsigned num_tiles, tile_count;
+
+   boolean done;
+   boolean binned;  /**< has this query been binned in the scene? */
+};
+
+
 extern void llvmpipe_init_query_funcs(struct llvmpipe_context * );