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
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  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 struct st_query_object
  47 {
  48    struct gl_query_object base;
  49    struct pipe_query *pq;
  50 };
  51
  52
  53 /**
  54  * Cast wrapper
  55  */
  56 static struct st_query_object *
  57 st_query_object(struct gl_query_object *q)
  58 {
  59    return (struct st_query_object *) q;
  60 }
  61
  62
  63 static struct gl_query_object *
  64 st_NewQueryObject(GLcontext *ctx, GLuint id)
  65 {
  66    struct st_query_object *stq = ST_CALLOC_STRUCT(st_query_object);
  67    if (stq) {
  68       stq->base.Id = id;
  69       stq->base.Ready = GL_TRUE;
  70       stq->pq = NULL;
  71       return &stq->base;
  72    }
  73    return NULL;
  74 }
  75
  76
  77
  78 static void
  79 st_DeleteQuery(GLcontext *ctx, struct gl_query_object *q)
  80 {
  81    struct pipe_context *pipe = ctx->st->pipe;
  82    struct st_query_object *stq = st_query_object(q);
  83
  84    if (stq->pq) {
  85       pipe->destroy_query(pipe, stq->pq);
  86       stq->pq = NULL;
  87    }
  88
  89    _mesa_free(stq);
  90 }
  91
  92
  93 static void
  94 st_BeginQuery(GLcontext *ctx, struct gl_query_object *q)
  95 {
  96    struct pipe_context *pipe = ctx->st->pipe;
  97    struct st_query_object *stq = st_query_object(q);
  98
  99    switch (q->Target) {
 100    case GL_SAMPLES_PASSED_ARB:
 101       if (!stq->pq)
 102          stq->pq = pipe->create_query( pipe, PIPE_QUERY_OCCLUSION_COUNTER );
 103       break;
 104    default:
 105       assert(0);
 106       return;
 107    }
 108
 109    pipe->begin_query(pipe, stq->pq);
 110 }
 111
 112
 113 static void
 114 st_EndQuery(GLcontext *ctx, struct gl_query_object *q)
 115 {
 116    struct pipe_context *pipe = ctx->st->pipe;
 117    struct st_query_object *stq = st_query_object(q);
 118
 119    pipe->end_query(pipe, stq->pq);
 120 }
 121
 122
 123 static void
 124 st_WaitQuery(GLcontext *ctx, struct gl_query_object *q)
 125 {
 126    struct pipe_context *pipe = ctx->st->pipe;
 127    struct st_query_object *stq = st_query_object(q);
 128
 129    /* this function should only be called if we don't have a ready result */
 130    assert(!stq->base.Ready);
 131
 132    while (!stq->base.Ready &&
 133           !pipe->get_query_result(pipe,
 134                                   stq->pq,
 135                                   TRUE,
 136                                   &q->Result))
 137    {
 138       /* nothing */
 139    }
 140
 141    q->Ready = GL_TRUE;
 142 }
 143
 144
 145 static void
 146 st_CheckQuery(GLcontext *ctx, struct gl_query_object *q)
 147 {
 148    struct pipe_context *pipe = ctx->st->pipe;
 149    struct st_query_object *stq = st_query_object(q);
 150
 151    if (!q->Ready) {
 152       q->Ready = pipe->get_query_result(pipe,
 153                                         stq->pq,
 154                                         FALSE,
 155                                         &q->Result);
 156    }
 157 }
 158
 159
 160
 161
 162 void st_init_query_functions(struct dd_function_table *functions)
 163 {
 164    functions->NewQueryObject = st_NewQueryObject;
 165    functions->DeleteQuery = st_DeleteQuery;
 166    functions->BeginQuery = st_BeginQuery;
 167    functions->EndQuery = st_EndQuery;
 168    functions->WaitQuery = st_WaitQuery;
 169    functions->CheckQuery = st_CheckQuery;
 170 }