src/gallium/drivers/llvmpipe/lp_query.c

/**************************************************************************
 * 
 * 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
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

/* Authors:
 *    Keith Whitwell, Qicheng Christopher Li, Brian Paul
 */

#include "draw/draw_context.h"
#include "pipe/p_defines.h"
#include "util/u_memory.h"
#include "lp_context.h"
#include "lp_flush.h"
#include "lp_query.h"
#include "lp_rast.h"
#include "lp_rast_priv.h"
#include "lp_state.h"


static struct llvmpipe_query *llvmpipe_query( struct pipe_query *p )
{
   return (struct llvmpipe_query *)p;
}

static struct pipe_query *
llvmpipe_create_query(struct pipe_context *pipe, 
		      unsigned type)
{
   struct llvmpipe_query *pq;

   assert(type == PIPE_QUERY_OCCLUSION_COUNTER);

   pq = CALLOC_STRUCT( llvmpipe_query );
   if (pq) {
      pipe_mutex_init(pq->mutex);
   }

   return (struct pipe_query *) pq;
}


static void
llvmpipe_destroy_query(struct pipe_context *pipe, struct pipe_query *q)
{
   struct llvmpipe_query *pq = llvmpipe_query(q);
   pipe_mutex_destroy(pq->mutex);
   FREE(pq);
}


static boolean
llvmpipe_get_query_result(struct pipe_context *pipe, 
			  struct pipe_query *q,
			  boolean wait,
			  uint64_t *result )
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context( pipe );
   struct llvmpipe_query *pq = llvmpipe_query(q);

   if (!pq->done) {
      lp_setup_flush(llvmpipe->setup, 0);
   }

   if (pq->done) {
      *result = pq->result;
   }

   return pq->done;
}


static void
llvmpipe_begin_query(struct pipe_context *pipe, struct pipe_query *q)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context( pipe );
   struct llvmpipe_query *pq = llvmpipe_query(q);

   /* Check if the query is already in the scene.  If so, we need to
    * flush the scene now.  Real apps shouldn't re-use a query in a
    * frame of rendering.
    */
   if (pq->binned) {
      struct pipe_fence_handle *fence;
      llvmpipe_flush(pipe, 0, &fence);
      if (fence) {
         pipe->screen->fence_finish(pipe->screen, fence, 0);
         pipe->screen->fence_reference(pipe->screen, &fence, NULL);
      }
   }

   lp_setup_begin_query(llvmpipe->setup, pq);

   llvmpipe->active_query_count++;
   llvmpipe->dirty |= LP_NEW_QUERY;
}


static void
llvmpipe_end_query(struct pipe_context *pipe, struct pipe_query *q)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context( pipe );
   struct llvmpipe_query *pq = llvmpipe_query(q);

   lp_setup_end_query(llvmpipe->setup, pq);

   assert(llvmpipe->active_query_count);
   llvmpipe->active_query_count--;
   llvmpipe->dirty |= LP_NEW_QUERY;
}


void llvmpipe_init_query_funcs(struct llvmpipe_context *llvmpipe )
{
   llvmpipe->pipe.create_query = llvmpipe_create_query;
   llvmpipe->pipe.destroy_query = llvmpipe_destroy_query;
   llvmpipe->pipe.begin_query = llvmpipe_begin_query;
   llvmpipe->pipe.end_query = llvmpipe_end_query;
   llvmpipe->pipe.get_query_result = llvmpipe_get_query_result;
}