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/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* glBegin/EndQuery interface to pipe
*
* \author Brian Paul
*/
#include "main/imports.h"
#include "main/context.h"
#include "main/image.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "st_context.h"
#include "st_cb_queryobj.h"
#include "st_public.h"
struct st_query_object
{
struct gl_query_object base;
struct pipe_query *pq;
};
/**
* Cast wrapper
*/
static struct st_query_object *
st_query_object(struct gl_query_object *q)
{
return (struct st_query_object *) q;
}
static struct gl_query_object *
st_NewQueryObject(GLcontext *ctx, GLuint id)
{
struct st_query_object *stq = CALLOC_STRUCT(st_query_object);
if (stq) {
stq->base.Id = id;
stq->base.Ready = GL_TRUE;
stq->pq = NULL;
return &stq->base;
}
return NULL;
}
static void
st_DeleteQuery(GLcontext *ctx, struct gl_query_object *q)
{
struct pipe_context *pipe = ctx->st->pipe;
struct st_query_object *stq = st_query_object(q);
if (stq->pq) {
pipe->destroy_query(pipe, stq->pq);
stq->pq = NULL;
}
FREE(stq);
}
/**
* Do glReadPixels by getting rows from the framebuffer surface with
* get_tile(). Convert to requested format/type with Mesa image routines.
* Image transfer ops are done in software too.
*/
static void
st_BeginQuery(GLcontext *ctx, struct gl_query_object *q)
{
struct pipe_context *pipe = ctx->st->pipe;
struct st_query_object *stq = st_query_object(q);
switch (q->Target) {
case GL_SAMPLES_PASSED_ARB:
if (!stq->pq)
stq->pq = pipe->create_query( pipe, PIPE_QUERY_OCCLUSION_COUNTER );
break;
default:
assert(0);
return;
}
pipe->begin_query(pipe, stq->pq);
}
static void
st_EndQuery(GLcontext *ctx, struct gl_query_object *q)
{
struct pipe_context *pipe = ctx->st->pipe;
struct st_query_object *stq = st_query_object(q);
pipe->end_query(pipe, stq->pq);
}
static void
st_WaitQuery(GLcontext *ctx, struct gl_query_object *q)
{
struct pipe_context *pipe = ctx->st->pipe;
struct st_query_object *stq = st_query_object(q);
/* this function should only be called if we don't have a ready result */
assert(!stq->base.Ready);
while (!stq->base.Ready &&
!pipe->get_query_result(pipe,
stq->pq,
TRUE,
&q->Result))
{
/* nothing */
}
q->Ready = GL_TRUE;
}
static void
st_CheckQuery(GLcontext *ctx, struct gl_query_object *q)
{
struct pipe_context *pipe = ctx->st->pipe;
struct st_query_object *stq = st_query_object(q);
if (!q->Ready) {
q->Ready = pipe->get_query_result(pipe,
stq->pq,
FALSE,
&q->Result);
}
}
void st_init_query_functions(struct dd_function_table *functions)
{
functions->NewQueryObject = st_NewQueryObject;
functions->DeleteQuery = st_DeleteQuery;
functions->BeginQuery = st_BeginQuery;
functions->EndQuery = st_EndQuery;
functions->WaitQuery = st_WaitQuery;
functions->CheckQuery = st_CheckQuery;
}
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