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 #include "st_public.h"
  45
  46
  47 struct st_query_object
  48 {
  49    struct gl_query_object base;
  50    struct pipe_query *pq;
  51 };
  52
  53
  54 /**
  55  * Cast wrapper
  56  */
  57 static struct st_query_object *
  58 st_query_object(struct gl_query_object *q)
  59 {
  60    return (struct st_query_object *) q;
  61 }
  62
  63
  64 static struct gl_query_object *
  65 st_NewQueryObject(GLcontext *ctx, GLuint id)
  66 {
  67    struct st_query_object *stq = CALLOC_STRUCT(st_query_object);
  68    if (stq) {
  69       stq->base.Id = id;
  70       stq->base.Ready = GL_TRUE;
  71       stq->pq = NULL;
  72       return &stq->base;
  73    }
  74    return NULL;
  75 }
  76
  77
  78
  79 static void
  80 st_DeleteQuery(GLcontext *ctx, struct gl_query_object *q)
  81 {
  82    struct pipe_context *pipe = ctx->st->pipe;
  83    struct st_query_object *stq = st_query_object(q);
  84
  85    if (stq->pq) {
  86       pipe->destroy_query(pipe, stq->pq);
  87       stq->pq = NULL;
  88    }
  89
  90    FREE(stq);
  91 }
  92
  93 /**
  94  * Do glReadPixels by getting rows from the framebuffer surface with
  95  * get_tile().  Convert to requested format/type with Mesa image routines.
  96  * Image transfer ops are done in software too.
  97  */
  98 static void
  99 st_BeginQuery(GLcontext *ctx, struct gl_query_object *q)
 100 {
 101    struct pipe_context *pipe = ctx->st->pipe;
 102    struct st_query_object *stq = st_query_object(q);
 103
 104    switch (q->Target) {
 105    case GL_SAMPLES_PASSED_ARB:
 106       if (!stq->pq)
 107          stq->pq = pipe->create_query( pipe, PIPE_QUERY_OCCLUSION_COUNTER );
 108       break;
 109    default:
 110       assert(0);
 111       return;
 112    }
 113
 114    pipe->begin_query(pipe, stq->pq);
 115 }
 116
 117
 118 static void
 119 st_EndQuery(GLcontext *ctx, struct gl_query_object *q)
 120 {
 121    struct pipe_context *pipe = ctx->st->pipe;
 122    struct st_query_object *stq = st_query_object(q);
 123
 124    pipe->end_query(pipe, stq->pq);
 125 }
 126
 127
 128 static void
 129 st_WaitQuery(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
 134    /* this function should only be called if we don't have a ready result */
 135    assert(!stq->base.Ready);
 136
 137    while (!stq->base.Ready &&
 138           !pipe->get_query_result(pipe,
 139                                   stq->pq,
 140                                   TRUE,
 141                                   &q->Result))
 142    {
 143       /* nothing */
 144    }
 145
 146    q->Ready = GL_TRUE;
 147 }
 148
 149
 150 static void
 151 st_CheckQuery(GLcontext *ctx, struct gl_query_object *q)
 152 {
 153    struct pipe_context *pipe = ctx->st->pipe;
 154    struct st_query_object *stq = st_query_object(q);
 155
 156    if (!q->Ready) {
 157       q->Ready = pipe->get_query_result(pipe,
 158                                         stq->pq,
 159                                         FALSE,
 160                                         &q->Result);
 161    }
 162 }
 163
 164
 165
 166
 167 void st_init_query_functions(struct dd_function_table *functions)
 168 {
 169    functions->NewQueryObject = st_NewQueryObject;
 170    functions->DeleteQuery = st_DeleteQuery;
 171    functions->BeginQuery = st_BeginQuery;
 172    functions->EndQuery = st_EndQuery;
 173    functions->WaitQuery = st_WaitQuery;
 174    functions->CheckQuery = st_CheckQuery;
 175 }