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/****************************************************************************
**
** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "commandthread_p.h"
#include <QOpenGLContext>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
namespace Render {
CommandThread::CommandThread(Renderer *renderer)
: QThread()
, m_renderer(renderer)
, m_waitForStartSemaphore(0)
, m_initializedSemaphore(0)
{
}
CommandThread::~CommandThread()
{
}
// Called by RenderThread or MainThread (Scene3d)
void CommandThread::initialize(QOpenGLContext *mainContext)
{
// Start the thread
start();
// Wait for thread to be started
m_waitForStartSemaphore.acquire();
m_mainContext = mainContext;
Q_ASSERT(m_mainContext);
// Allow thread to proceed
m_initializedSemaphore.release();
}
// Called by RenderThread of MainThread (Scene3D)
void CommandThread::shutdown()
{
// Tell thread to exit event loop
QThread::quit();
// Wait for thread to exit
wait();
// Reset semaphores (in case we ever want to restart)
m_waitForStartSemaphore.release(m_waitForStartSemaphore.available());
m_initializedSemaphore.release(m_initializedSemaphore.available());
m_localContext.reset();
}
// Any thread can call this, this is a blocking command
void CommandThread::executeCommand(Command *command)
{
if (!isRunning())
return;
QMetaObject::invokeMethod(this,
"executeCommandInternal",
Qt::BlockingQueuedConnection,
Q_ARG(Command *, command));
}
void CommandThread::run()
{
// Allow initialize to proceed
m_waitForStartSemaphore.release();
// Wait for initialize to be completed
m_initializedSemaphore.acquire();
// Initialize shared context and resources for the thread
m_localContext.reset(new QOpenGLContext());
m_localContext->setShareContext(m_mainContext);
// Launch exec loop
QThread::exec();
}
// Executed in the Command Thread
void CommandThread::executeCommandInternal(Command *command)
{
command->execute(m_renderer, m_localContext.data());
}
} // Render
} // Qt3DRender
QT_END_NAMESPACE
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