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/****************************************************************************
**
** Copyright (C) 2014 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 "renderqueue_p.h"
#include <renderview_p.h>
#include <QThread>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
namespace Render {
namespace OpenGL {
RenderQueue::RenderQueue()
: m_noRender(false)
, m_wasReset(true)
, m_targetRenderViewCount(0)
, m_currentRenderViewCount(0)
, m_currentWorkQueue(1)
{
}
int RenderQueue::currentRenderViewCount() const
{
return m_currentRenderViewCount;
}
/*
* In case the framegraph changed or when the current number of render queue
* needs to be reset.
*/
void RenderQueue::reset()
{
m_currentRenderViewCount = 0;
m_targetRenderViewCount = 0;
m_currentWorkQueue.clear();
m_noRender = false;
m_wasReset = true;
}
void RenderQueue::setNoRender()
{
Q_ASSERT(m_targetRenderViewCount == 0);
m_noRender = true;
}
/*
* Queue up a RenderView for the frame being built.
* Thread safe as this is called from the renderer which is locked.
* Returns true if the renderView is complete
*/
bool RenderQueue::queueRenderView(RenderView *renderView, uint submissionOrderIndex)
{
Q_ASSERT(!m_noRender);
m_currentWorkQueue[submissionOrderIndex] = renderView;
++m_currentRenderViewCount;
Q_ASSERT(m_currentRenderViewCount <= m_targetRenderViewCount);
return isFrameQueueComplete();
}
/*
* Called by the Rendering Thread to retrieve the a frame queue to render.
* A call to reset is required after rendering of the frame. Otherwise under some
* conditions the current but then invalidated frame queue could be reused.
*/
QVector<RenderView *> RenderQueue::nextFrameQueue()
{
return m_currentWorkQueue;
}
/*
* Sets the number \a targetRenderViewCount of RenderView objects that make up a frame.
*/
void RenderQueue::setTargetRenderViewCount(int targetRenderViewCount)
{
Q_ASSERT(!m_noRender);
m_targetRenderViewCount = targetRenderViewCount;
m_currentWorkQueue.resize(targetRenderViewCount);
m_wasReset = false;
}
/*
* Returns true if all the RenderView objects making up the current frame have been queued.
* Returns false otherwise.
* \note a frameQueue or size 0 is considered incomplete.
*/
bool RenderQueue::isFrameQueueComplete() const
{
return (m_noRender
|| (m_targetRenderViewCount > 0 && m_targetRenderViewCount == m_currentRenderViewCount));
}
} // namespace OpenGL
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
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