src/gallium/drivers/softpipe/sp_query.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 /* Author:
  29  *    Keith Whitwell <keith@tungstengraphics.com>
  30  */
  31
  32 #include "draw/draw_context.h"
  33 #include "pipe/p_defines.h"
  34 #include "util/u_memory.h"
  35 #include "sp_context.h"
  36 #include "sp_query.h"
  37 #include "sp_state.h"
  38
  39 struct softpipe_query {
  40    uint64_t start;
  41    uint64_t end;
  42 };
  43
  44
  45 static struct softpipe_query *softpipe_query( struct pipe_query *p )
  46 {
  47    return (struct softpipe_query *)p;
  48 }
  49
  50 static struct pipe_query *
  51 softpipe_create_query(struct pipe_context *pipe,
  52                       unsigned type)
  53 {
  54    assert(type == PIPE_QUERY_OCCLUSION_COUNTER);
  55    return (struct pipe_query *)CALLOC_STRUCT( softpipe_query );
  56 }
  57
  58
  59 static void
  60 softpipe_destroy_query(struct pipe_context *pipe, struct pipe_query *q)
  61 {
  62    FREE(q);
  63 }
  64
  65
  66 static void
  67 softpipe_begin_query(struct pipe_context *pipe, struct pipe_query *q)
  68 {
  69    struct softpipe_context *softpipe = softpipe_context( pipe );
  70    struct softpipe_query *sq = softpipe_query(q);
  71
  72    sq->start = softpipe->occlusion_count;
  73    softpipe->active_query_count++;
  74    softpipe->dirty |= SP_NEW_QUERY;
  75 }
  76
  77
  78 static void
  79 softpipe_end_query(struct pipe_context *pipe, struct pipe_query *q)
  80 {
  81    struct softpipe_context *softpipe = softpipe_context( pipe );
  82    struct softpipe_query *sq = softpipe_query(q);
  83
  84    softpipe->active_query_count--;
  85    sq->end = softpipe->occlusion_count;
  86    softpipe->dirty |= SP_NEW_QUERY;
  87 }
  88
  89
  90 static boolean
  91 softpipe_get_query_result(struct pipe_context *pipe,
  92                           struct pipe_query *q,
  93                           boolean wait,
  94                           uint64_t *result )
  95 {
  96    struct softpipe_query *sq = softpipe_query(q);
  97    *result = sq->end - sq->start;
  98    return TRUE;
  99 }
 100
 101
 102 /**
 103  * Called by rendering function to check rendering is conditional.
 104  * \return TRUE if we should render, FALSE if we should skip rendering
 105  */
 106 boolean
 107 softpipe_check_render_cond(struct softpipe_context *sp)
 108 {
 109    struct pipe_context *pipe = &sp->pipe;
 110    boolean b, wait;
 111    uint64_t result;
 112
 113    if (!sp->render_cond_query) {
 114       return TRUE;  /* no query predicate, draw normally */
 115    }
 116
 117    wait = (sp->render_cond_mode == PIPE_RENDER_COND_WAIT ||
 118            sp->render_cond_mode == PIPE_RENDER_COND_BY_REGION_WAIT);
 119
 120    b = pipe->get_query_result(pipe, sp->render_cond_query, wait, &result);
 121    if (b)
 122       return result > 0;
 123    else
 124       return TRUE;
 125 }
 126
 127
 128 void softpipe_init_query_funcs(struct softpipe_context *softpipe )
 129 {
 130    softpipe->pipe.create_query = softpipe_create_query;
 131    softpipe->pipe.destroy_query = softpipe_destroy_query;
 132    softpipe->pipe.begin_query = softpipe_begin_query;
 133    softpipe->pipe.end_query = softpipe_end_query;
 134    softpipe->pipe.get_query_result = softpipe_get_query_result;
 135 }
 136
 137