src/gallium/drivers/i915/i915_query.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2011 The Chromium OS authors.
   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 GOOGLE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /* Fake occlusion queries which return 0, it's better than crashing */
  29
  30 #include "pipe/p_compiler.h"
  31
  32 #include "util/u_memory.h"
  33
  34 #include "i915_context.h"
  35 #include "i915_query.h"
  36
  37 struct i915_query
  38 {
  39    unsigned query;
  40 };
  41
  42 static struct pipe_query *i915_create_query(struct pipe_context *ctx,
  43                                             unsigned query_type)
  44 {
  45    struct i915_query *query = CALLOC_STRUCT( i915_query );
  46
  47    return (struct pipe_query *)query;
  48 }
  49
  50 static void i915_destroy_query(struct pipe_context *ctx,
  51                                struct pipe_query *query)
  52 {
  53    FREE(query);
  54 }
  55
  56 static void i915_begin_query(struct pipe_context *ctx,
  57                              struct pipe_query *query)
  58 {
  59 }
  60
  61 static void i915_end_query(struct pipe_context *ctx, struct pipe_query *query)
  62 {
  63 }
  64
  65 static boolean i915_get_query_result(struct pipe_context *ctx,
  66                                      struct pipe_query *query,
  67                                      boolean wait,
  68                                      void *vresult)
  69 {
  70    uint64_t *result = (uint64_t*)vresult;
  71
  72    /* 2* viewport Max */
  73    *result = 512*1024*1024;
  74    return TRUE;
  75 }
  76
  77 void
  78 i915_init_query_functions(struct i915_context *i915)
  79 {
  80    i915->base.create_query = i915_create_query;
  81    i915->base.destroy_query = i915_destroy_query;
  82    i915->base.begin_query = i915_begin_query;
  83    i915->base.end_query = i915_end_query;
  84    i915->base.get_query_result = i915_get_query_result;
  85 }
  86