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//
// Copyright 2015 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// QueryGL.cpp: Implements the class methods for QueryGL.
#include "libANGLE/renderer/gl/QueryGL.h"
#include "common/debug.h"
#include "libANGLE/renderer/gl/FunctionsGL.h"
#include "libANGLE/renderer/gl/StateManagerGL.h"
namespace
{
GLuint64 MergeQueryResults(GLenum type, GLuint64 currentResult, GLuint64 newResult)
{
switch (type)
{
case GL_ANY_SAMPLES_PASSED:
case GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
return (currentResult == GL_TRUE || newResult == GL_TRUE) ? GL_TRUE : GL_FALSE;
case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
return currentResult + newResult;
case GL_TIME_ELAPSED:
return currentResult + newResult;
case GL_TIMESTAMP:
return newResult;
default:
UNREACHABLE();
return 0;
}
}
} // anonymous namespace
namespace rx
{
QueryGL::QueryGL(GLenum type, const FunctionsGL *functions, StateManagerGL *stateManager)
: QueryImpl(type),
mType(type),
mFunctions(functions),
mStateManager(stateManager),
mActiveQuery(0),
mPendingQueries(),
mResultSum(0)
{
}
QueryGL::~QueryGL()
{
mStateManager->deleteQuery(mActiveQuery);
mStateManager->onDeleteQueryObject(this);
while (!mPendingQueries.empty())
{
mStateManager->deleteQuery(mPendingQueries.front());
mPendingQueries.pop_front();
}
}
gl::Error QueryGL::begin()
{
mResultSum = 0;
mStateManager->onBeginQuery(this);
return resume();
}
gl::Error QueryGL::end()
{
return pause();
}
gl::Error QueryGL::queryCounter()
{
ASSERT(mType == GL_TIMESTAMP);
// Directly create a query for the timestamp and add it to the pending query queue, as timestamp
// queries do not have the traditional begin/end block and never need to be paused/resumed
GLuint query;
mFunctions->genQueries(1, &query);
mFunctions->queryCounter(query, GL_TIMESTAMP);
mPendingQueries.push_back(query);
return gl::Error(GL_NO_ERROR);
}
template <typename T>
gl::Error QueryGL::getResultBase(T *params)
{
ASSERT(mActiveQuery == 0);
gl::Error error = flush(true);
if (error.isError())
{
return error;
}
ASSERT(mPendingQueries.empty());
*params = static_cast<T>(mResultSum);
return gl::Error(GL_NO_ERROR);
}
gl::Error QueryGL::getResult(GLint *params)
{
return getResultBase(params);
}
gl::Error QueryGL::getResult(GLuint *params)
{
return getResultBase(params);
}
gl::Error QueryGL::getResult(GLint64 *params)
{
return getResultBase(params);
}
gl::Error QueryGL::getResult(GLuint64 *params)
{
return getResultBase(params);
}
gl::Error QueryGL::isResultAvailable(bool *available)
{
ASSERT(mActiveQuery == 0);
gl::Error error = flush(false);
if (error.isError())
{
return error;
}
*available = mPendingQueries.empty();
return gl::Error(GL_NO_ERROR);
}
gl::Error QueryGL::pause()
{
if (mActiveQuery != 0)
{
mStateManager->endQuery(mType, mActiveQuery);
mPendingQueries.push_back(mActiveQuery);
mActiveQuery = 0;
}
// Flush to make sure the pending queries don't add up too much.
gl::Error error = flush(false);
if (error.isError())
{
return error;
}
return gl::Error(GL_NO_ERROR);
}
gl::Error QueryGL::resume()
{
if (mActiveQuery == 0)
{
// Flush to make sure the pending queries don't add up too much.
gl::Error error = flush(false);
if (error.isError())
{
return error;
}
mFunctions->genQueries(1, &mActiveQuery);
mStateManager->beginQuery(mType, mActiveQuery);
}
return gl::Error(GL_NO_ERROR);
}
gl::Error QueryGL::flush(bool force)
{
while (!mPendingQueries.empty())
{
GLuint id = mPendingQueries.front();
if (!force)
{
GLuint resultAvailable = 0;
mFunctions->getQueryObjectuiv(id, GL_QUERY_RESULT_AVAILABLE, &resultAvailable);
if (resultAvailable == GL_FALSE)
{
return gl::Error(GL_NO_ERROR);
}
}
// Even though getQueryObjectui64v was introduced for timer queries, there is nothing in the
// standard that says that it doesn't work for any other queries. It also passes on all the
// trybots, so we use it if it is available
if (mFunctions->getQueryObjectui64v != nullptr)
{
GLuint64 result = 0;
mFunctions->getQueryObjectui64v(id, GL_QUERY_RESULT, &result);
mResultSum = MergeQueryResults(mType, mResultSum, result);
}
else
{
GLuint result = 0;
mFunctions->getQueryObjectuiv(id, GL_QUERY_RESULT, &result);
mResultSum = MergeQueryResults(mType, mResultSum, static_cast<GLuint64>(result));
}
mStateManager->deleteQuery(id);
mPendingQueries.pop_front();
}
return gl::Error(GL_NO_ERROR);
}
}
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