sp_query.c revision cdc920a0 
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
39struct softpipe_query {
40   uint64_t start;
41   uint64_t end;
42};
43
44
45static struct softpipe_query *softpipe_query( struct pipe_query *p )
46{
47   return (struct softpipe_query *)p;
48}
49
50static struct pipe_query *
51softpipe_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
59static void
60softpipe_destroy_query(struct pipe_context *pipe, struct pipe_query *q)
61{
62   FREE(q);
63}
64
65
66static void
67softpipe_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
78static void
79softpipe_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
90static boolean
91softpipe_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 */
106boolean
107softpipe_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
128void 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
138