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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtWebEngine 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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.LGPLv3 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.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 later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef DELEGATED_FRAME_NODE_H
#define DELEGATED_FRAME_NODE_H
#include "base/memory/scoped_ptr.h"
#include "cc/resources/transferable_resource.h"
#include <QMutex>
#include <QSGNode>
#include <QSharedData>
#include <QSharedPointer>
#include <QWaitCondition>
#include "chromium_gpu_helper.h"
namespace cc {
class DelegatedFrameData;
}
class MailboxTexture;
class RenderPassTexture;
// Separating this data allows another DelegatedFrameNode to reconstruct the QSGNode tree from the mailbox textures
// and render pass information.
class DelegatedFrameNodeData : public QSharedData {
public:
DelegatedFrameNodeData() : frameDevicePixelRatio(1) { }
QHash<unsigned, QSharedPointer<MailboxTexture> > mailboxTextures;
scoped_ptr<cc::DelegatedFrameData> frameData;
qreal frameDevicePixelRatio;
};
class DelegatedFrameNode : public QSGTransformNode {
public:
DelegatedFrameNode();
~DelegatedFrameNode();
void preprocess();
void commit(DelegatedFrameNodeData* data, cc::ReturnedResourceArray *resourcesToRelease);
private:
QExplicitlySharedDataPointer<DelegatedFrameNodeData> m_data;
QList<QSharedPointer<RenderPassTexture> > m_renderPassTextures;
int m_numPendingSyncPoints;
FenceSync m_mailboxesGLFence;
QWaitCondition m_mailboxesFetchedWaitCond;
QMutex m_mutex;
// Making those callbacks static bypasses base::Bind's ref-counting requirement
// of the this pointer when the callback is a method.
static void fetchTexturesAndUnlockQt(DelegatedFrameNode *frameNode, QList<MailboxTexture *> *mailboxesToFetch);
static void syncPointRetired(DelegatedFrameNode *frameNode, QList<MailboxTexture *> *mailboxesToFetch);
};
#endif // DELEGATED_FRAME_NODE_H
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