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#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"

QT_BEGIN_NAMESPACE
class QSGRenderContext;
QT_END_NAMESPACE

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(QSGRenderContext *sgRenderContext);
    ~DelegatedFrameNode();
    void preprocess();
    void commit(DelegatedFrameNodeData* data, cc::ReturnedResourceArray *resourcesToRelease);

private:
    QExplicitlySharedDataPointer<DelegatedFrameNodeData> m_data;
    QSGRenderContext *m_sgRenderContext;
    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