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_object 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       return &stq->base;
  72    }
  73    return NULL;
  74 }
  75
  76
  77 /**
  78  * Do glReadPixels by getting rows from the framebuffer surface with
  79  * get_tile().  Convert to requested format/type with Mesa image routines.
  80  * Image transfer ops are done in software too.
  81  */
  82 static void
  83 st_BeginQuery(GLcontext *ctx, struct gl_query_object *q)
  84 {
  85    struct pipe_context *pipe = ctx->st->pipe;
  86    struct st_query_object *stq = st_query_object(q);
  87
  88    stq->pq.count = 0;
  89
  90    switch (q->Target) {
  91    case GL_SAMPLES_PASSED_ARB:
  92       stq->pq.type = PIPE_QUERY_OCCLUSION_COUNTER;
  93       break;
  94    case GL_PRIMITIVES_GENERATED_NV:
  95       /* someday */
  96       stq->pq.type = PIPE_QUERY_PRIMITIVES_GENERATED;
  97       break;
  98    case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_NV:
  99       /* someday */
 100       stq->pq.type = PIPE_QUERY_PRIMITIVES_EMITTED;
 101       break;
 102    default:
 103       assert(0);
 104    }
 105
 106    pipe->begin_query(pipe, &stq->pq);
 107 }
 108
 109
 110 static void
 111 st_EndQuery(GLcontext *ctx, struct gl_query_object *q)
 112 {
 113    struct pipe_context *pipe = ctx->st->pipe;
 114    struct st_query_object *stq = st_query_object(q);
 115
 116    pipe->end_query(pipe, &stq->pq);
 117    stq->base.Ready = stq->pq.ready;
 118    if (stq->base.Ready)
 119       stq->base.Result = stq->pq.count;
 120 }
 121
 122
 123 static void
 124 st_WaitQuery(GLcontext *ctx, struct gl_query_object *q)
 125 {
 126    struct pipe_context *pipe = ctx->st->pipe;
 127    struct st_query_object *stq = st_query_object(q);
 128
 129    /* this function should only be called if we don't have a ready result */
 130    assert(!stq->base.Ready);
 131
 132    pipe->wait_query(pipe, &stq->pq);
 133    q->Ready = GL_TRUE;
 134    q->Result = stq->pq.count;
 135 }
 136
 137
 138
 139 void st_init_query_functions(struct dd_function_table *functions)
 140 {
 141    functions->NewQueryObject = st_NewQueryObject;
 142    functions->BeginQuery = st_BeginQuery;
 143    functions->EndQuery = st_EndQuery;
 144    functions->WaitQuery = st_WaitQuery;
 145 }