src/gallium/drivers/r300/r300_query.c

   1 /*
   2  * Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #include "util/u_memory.h"
  24 #include "util/u_simple_list.h"
  25
  26 #include "r300_context.h"
  27 #include "r300_screen.h"
  28 #include "r300_emit.h"
  29
  30 #include <stdio.h>
  31
  32 static struct pipe_query *r300_create_query(struct pipe_context *pipe,
  33                                             unsigned query_type)
  34 {
  35     struct r300_context *r300 = r300_context(pipe);
  36     struct r300_screen *r300screen = r300->screen;
  37     struct r300_query *q;
  38
  39     if (query_type != PIPE_QUERY_OCCLUSION_COUNTER) {
  40         return NULL;
  41     }
  42
  43     q = CALLOC_STRUCT(r300_query);
  44     if (!q)
  45         return NULL;
  46
  47     q->type = query_type;
  48
  49     if (r300screen->caps.family == CHIP_FAMILY_RV530)
  50         q->num_pipes = r300screen->info.r300_num_z_pipes;
  51     else
  52         q->num_pipes = r300screen->info.r300_num_gb_pipes;
  53
  54     /* Open up the occlusion query buffer. */
  55     q->buf = r300->rws->buffer_create(r300->rws, 4096, 4096,
  56                                          PIPE_BIND_CUSTOM, PIPE_USAGE_STAGING);
  57     q->cs_buf = r300->rws->buffer_get_cs_handle(q->buf);
  58
  59     return (struct pipe_query*)q;
  60 }
  61
  62 static void r300_destroy_query(struct pipe_context* pipe,
  63                                struct pipe_query* query)
  64 {
  65     struct r300_query* q = r300_query(query);
  66
  67     pb_reference(&q->buf, NULL);
  68     FREE(query);
  69 }
  70
  71 void r300_resume_query(struct r300_context *r300,
  72                        struct r300_query *query)
  73 {
  74     r300->query_current = query;
  75     r300_mark_atom_dirty(r300, &r300->query_start);
  76 }
  77
  78 static void r300_begin_query(struct pipe_context* pipe,
  79                              struct pipe_query* query)
  80 {
  81     struct r300_context* r300 = r300_context(pipe);
  82     struct r300_query* q = r300_query(query);
  83
  84     if (r300->query_current != NULL) {
  85         fprintf(stderr, "r300: begin_query: "
  86                 "Some other query has already been started.\n");
  87         assert(0);
  88         return;
  89     }
  90
  91     q->num_results = 0;
  92     r300_resume_query(r300, q);
  93 }
  94
  95 void r300_stop_query(struct r300_context *r300)
  96 {
  97     r300_emit_query_end(r300);
  98     r300->query_current = NULL;
  99 }
 100
 101 static void r300_end_query(struct pipe_context* pipe,
 102                            struct pipe_query* query)
 103 {
 104     struct r300_context* r300 = r300_context(pipe);
 105     struct r300_query *q = r300_query(query);
 106
 107     if (q != r300->query_current) {
 108         fprintf(stderr, "r300: end_query: Got invalid query.\n");
 109         assert(0);
 110         return;
 111     }
 112
 113     r300_stop_query(r300);
 114 }
 115
 116 static boolean r300_get_query_result(struct pipe_context* pipe,
 117                                      struct pipe_query* query,
 118                                      boolean wait,
 119                                      void* vresult)
 120 {
 121     struct r300_context* r300 = r300_context(pipe);
 122     struct r300_query *q = r300_query(query);
 123     unsigned i;
 124     uint32_t temp, *map;
 125
 126     map = r300->rws->buffer_map(q->buf, r300->cs,
 127                                 PIPE_TRANSFER_READ |
 128                                 (!wait ? PIPE_TRANSFER_DONTBLOCK : 0));
 129     if (!map)
 130         return FALSE;
 131
 132     /* Sum up the results. */
 133     temp = 0;
 134     for (i = 0; i < q->num_results; i++) {
 135         temp += *map;
 136         map++;
 137     }
 138
 139     r300->rws->buffer_unmap(q->buf);
 140
 141     *((uint64_t*)vresult) = temp;
 142     return TRUE;
 143 }
 144
 145 static void r300_render_condition(struct pipe_context *pipe,
 146                                   struct pipe_query *query,
 147                                   uint mode)
 148 {
 149     struct r300_context *r300 = r300_context(pipe);
 150     uint64_t result = 0;
 151     boolean wait;
 152
 153     r300->skip_rendering = FALSE;
 154
 155     if (query) {
 156         wait = mode == PIPE_RENDER_COND_WAIT ||
 157                mode == PIPE_RENDER_COND_BY_REGION_WAIT;
 158
 159         if (r300_get_query_result(pipe, query, wait, &result)) {
 160             r300->skip_rendering = result == 0;
 161         }
 162     }
 163 }
 164
 165 void r300_init_query_functions(struct r300_context* r300) {
 166     r300->context.create_query = r300_create_query;
 167     r300->context.destroy_query = r300_destroy_query;
 168     r300->context.begin_query = r300_begin_query;
 169     r300->context.end_query = r300_end_query;
 170     r300->context.get_query_result = r300_get_query_result;
 171     r300->context.render_condition = r300_render_condition;
 172 }