src/mesa/state_tracker/st_cb_queryobj.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 /**
  30  * glBegin/EndQuery interface to pipe
  31  *
  32  * \author Brian Paul
  33  */
  34
  35
  36 #include "main/imports.h"
  37 #include "main/context.h"
  38 #include "main/image.h"
  39
  40 #include "pipe/p_context.h"
  41 #include "pipe/p_defines.h"
  42 #include "st_context.h"
  43 #include "st_cb_queryobj.h"
  44
  45
  46 static struct gl_query_object *
  47 st_NewQueryObject(GLcontext *ctx, GLuint id)
  48 {
  49    struct st_query_object *stq = ST_CALLOC_STRUCT(st_query_object);
  50    if (stq) {
  51       stq->base.Id = id;
  52       stq->base.Ready = GL_TRUE;
  53       stq->pq = NULL;
  54       return &stq->base;
  55    }
  56    return NULL;
  57 }
  58
  59
  60
  61 static void
  62 st_DeleteQuery(GLcontext *ctx, struct gl_query_object *q)
  63 {
  64    struct pipe_context *pipe = ctx->st->pipe;
  65    struct st_query_object *stq = st_query_object(q);
  66
  67    if (stq->pq) {
  68       pipe->destroy_query(pipe, stq->pq);
  69       stq->pq = NULL;
  70    }
  71
  72    free(stq);
  73 }
  74
  75
  76 static void
  77 st_BeginQuery(GLcontext *ctx, struct gl_query_object *q)
  78 {
  79    struct pipe_context *pipe = ctx->st->pipe;
  80    struct st_query_object *stq = st_query_object(q);
  81
  82    switch (q->Target) {
  83    case GL_SAMPLES_PASSED_ARB:
  84       if (!stq->pq)
  85          stq->pq = pipe->create_query( pipe, PIPE_QUERY_OCCLUSION_COUNTER );
  86       break;
  87    default:
  88       assert(0);
  89       return;
  90    }
  91
  92    pipe->begin_query(pipe, stq->pq);
  93 }
  94
  95
  96 static void
  97 st_EndQuery(GLcontext *ctx, struct gl_query_object *q)
  98 {
  99    struct pipe_context *pipe = ctx->st->pipe;
 100    struct st_query_object *stq = st_query_object(q);
 101
 102    pipe->end_query(pipe, stq->pq);
 103 }
 104
 105
 106 static void
 107 st_WaitQuery(GLcontext *ctx, struct gl_query_object *q)
 108 {
 109    struct pipe_context *pipe = ctx->st->pipe;
 110    struct st_query_object *stq = st_query_object(q);
 111
 112    /* this function should only be called if we don't have a ready result */
 113    assert(!stq->base.Ready);
 114
 115    while (!stq->base.Ready &&
 116           !pipe->get_query_result(pipe,
 117                                   stq->pq,
 118                                   TRUE,
 119                                   &q->Result))
 120    {
 121       /* nothing */
 122    }
 123
 124    q->Ready = GL_TRUE;
 125 }
 126
 127
 128 static void
 129 st_CheckQuery(GLcontext *ctx, struct gl_query_object *q)
 130 {
 131    struct pipe_context *pipe = ctx->st->pipe;
 132    struct st_query_object *stq = st_query_object(q);
 133    assert(!q->Ready);   /* we should not get called if Ready is TRUE */
 134    q->Ready = pipe->get_query_result(pipe, stq->pq, FALSE, &q->Result);
 135 }
 136
 137
 138
 139
 140 void st_init_query_functions(struct dd_function_table *functions)
 141 {
 142    functions->NewQueryObject = st_NewQueryObject;
 143    functions->DeleteQuery = st_DeleteQuery;
 144    functions->BeginQuery = st_BeginQuery;
 145    functions->EndQuery = st_EndQuery;
 146    functions->WaitQuery = st_WaitQuery;
 147    functions->CheckQuery = st_CheckQuery;
 148 }