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/*
* Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this program; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef QtSGUpdateQueue_h
#define QtSGUpdateQueue_h
#include "Deque.h"
#include "HashMap.h"
#include "OwnPtr.h"
class QImage;
class QRect;
class QQuickItem;
class QSGNode;
class QSize;
namespace WebKit {
class NodeUpdate;
class PageNode;
class QtSGTileNode;
// Takes care of taking update requests then fulfilling them asynchronously on the scene graph thread.
class QtSGUpdateQueue {
public:
QtSGUpdateQueue(QQuickItem*);
int createTileNode(float scale);
void removeTileNode(int nodeID);
void setNodeBackBuffer(int nodeID, const QImage& texture, const QRect& sourceRect, const QRect& targetRect);
void swapTileBuffers();
// Called by the QQuickItem.
void applyUpdates(QSGNode* itemNode);
bool isSwapPending() const { return m_isSwapPending; }
private:
QSGNode* getScaleNode(float scale, QSGNode* itemNode);
QQuickItem* item;
Deque<OwnPtr<NodeUpdate> > nodeUpdateQueue;
HashMap<int, QtSGTileNode*> nodes;
float lastScale;
QSGNode* lastScaleNode;
int nextNodeID;
bool m_isSwapPending;
};
struct NodeUpdate {
enum Type {
CreateTile,
RemoveTile,
SetBackBuffer,
SwapTileBuffers
};
NodeUpdate(Type type)
: type(type)
{ }
virtual ~NodeUpdate() { }
Type type;
};
}
#endif // QtSGUpdateQueue_h
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