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1901 serge 1 
/**************************************************************************
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 *
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 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 * All Rights Reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the
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 * "Software"), to deal in the Software without restriction, including
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 * without limitation the rights to use, copy, modify, merge, publish,
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 * distribute, sub license, and/or sell copies of the Software, and to
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 * permit persons to whom the Software is furnished to do so, subject to
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 * the following conditions:
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 *
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 * The above copyright notice and this permission notice (including the
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 * next paragraph) shall be included in all copies or substantial portions
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 * of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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 *
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 **************************************************************************/
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/**
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 * glBegin/EndQuery interface to pipe
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 *
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 * \author Brian Paul
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 */
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#include "main/imports.h"
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#include "main/context.h"
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#include "pipe/p_context.h"
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#include "pipe/p_defines.h"
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#include "st_context.h"
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#include "st_cb_queryobj.h"
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#if FEATURE_queryobj
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static struct gl_query_object *
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st_NewQueryObject(struct gl_context *ctx, GLuint id)
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{
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   struct st_query_object *stq = ST_CALLOC_STRUCT(st_query_object);
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   if (stq) {
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      stq->base.Id = id;
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      stq->base.Ready = GL_TRUE;
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      stq->pq = NULL;
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      stq->type = PIPE_QUERY_TYPES; /* an invalid value */
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      return &stq->base;
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   }
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   return NULL;
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}
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static void
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st_DeleteQuery(struct gl_context *ctx, struct gl_query_object *q)
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{
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   struct pipe_context *pipe = st_context(ctx)->pipe;
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   struct st_query_object *stq = st_query_object(q);
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   if (stq->pq) {
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      pipe->destroy_query(pipe, stq->pq);
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      stq->pq = NULL;
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   }
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   free(stq);
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}
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static void
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st_BeginQuery(struct gl_context *ctx, struct gl_query_object *q)
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{
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   struct pipe_context *pipe = st_context(ctx)->pipe;
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   struct st_query_object *stq = st_query_object(q);
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   unsigned type;
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   /* convert GL query type to Gallium query type */
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   switch (q->Target) {
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   case GL_SAMPLES_PASSED_ARB:
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      type = PIPE_QUERY_OCCLUSION_COUNTER;
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      break;
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   case GL_PRIMITIVES_GENERATED:
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      type = PIPE_QUERY_PRIMITIVES_GENERATED;
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      break;
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   case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
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      type = PIPE_QUERY_PRIMITIVES_EMITTED;
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      break;
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   case GL_TIME_ELAPSED_EXT:
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      type = PIPE_QUERY_TIME_ELAPSED;
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      break;
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   default:
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      assert(0 && "unexpected query target in st_BeginQuery()");
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      return;
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   }
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   if (stq->pq && stq->type != type) {
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      /* free old query of different type */
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      pipe->destroy_query(pipe, stq->pq);
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      stq->pq = NULL;
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      stq->type = PIPE_QUERY_TYPES; /* an invalid value */
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   }
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   if (!stq->pq) {
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      stq->pq = pipe->create_query(pipe, type);
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      stq->type = type;
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   }
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   assert(stq->type == type);
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   pipe->begin_query(pipe, stq->pq);
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}
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static void
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st_EndQuery(struct gl_context *ctx, struct gl_query_object *q)
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{
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   struct pipe_context *pipe = st_context(ctx)->pipe;
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   struct st_query_object *stq = st_query_object(q);
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   pipe->end_query(pipe, stq->pq);
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}
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static void
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st_WaitQuery(struct gl_context *ctx, struct gl_query_object *q)
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{
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   struct pipe_context *pipe = st_context(ctx)->pipe;
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   struct st_query_object *stq = st_query_object(q);
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   /* this function should only be called if we don't have a ready result */
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   assert(!stq->base.Ready);
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   while (!stq->base.Ready &&
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	  !pipe->get_query_result(pipe,
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				  stq->pq,
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				  TRUE,
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				  &q->Result))
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   {
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      /* nothing */
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   }
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   q->Ready = GL_TRUE;
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}
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static void
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st_CheckQuery(struct gl_context *ctx, struct gl_query_object *q)
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{
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   struct pipe_context *pipe = st_context(ctx)->pipe;
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   struct st_query_object *stq = st_query_object(q);
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   assert(!q->Ready);   /* we should not get called if Ready is TRUE */
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   q->Ready = pipe->get_query_result(pipe, stq->pq, FALSE, &q->Result);
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}
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void st_init_query_functions(struct dd_function_table *functions)
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{
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   functions->NewQueryObject = st_NewQueryObject;
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   functions->DeleteQuery = st_DeleteQuery;
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   functions->BeginQuery = st_BeginQuery;
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   functions->EndQuery = st_EndQuery;
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   functions->WaitQuery = st_WaitQuery;
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   functions->CheckQuery = st_CheckQuery;
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}
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#endif /* FEATURE_queryobj */