// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

#ifndef OPENWFCWRAPPER_H_

#define OPENWFCWRAPPER_H_

#include <babitflags.h>

#include <graphics/wsscene.h>

#include <babitflags.h>

#include <graphics/surface.h>

#include "displaypolicy.h"

//

//OpenWFC stuff

#include <e32std.h>

#include <e32base.h>

#include <e32hashtab.h>     //for RHashMap

#include <WF/wfc.h>

#include <EGL/egl.h>

#include <graphics/surfacemanager.h>

#include <graphics/wsdisplaycontrol.h>

//

class COpenWfcJobManger;

class TDisplayConfiguration;

class CElementWrapper;

class COpenWfcWrapper : public CBase, public MWsDisplayControl

	{

friend class CElementWrapper;

public:

	static COpenWfcWrapper* NewL(TInt aScreenNo, CDisplayPolicy* aDisplayPolicy);

	TInt SetUiSurface(const TSurfaceId& aNewUiSurface);

	~COpenWfcWrapper();

	MWsElement* CreateElementL();

	void DestroyElement(MWsElement* aElement);

	void Compose(const TSurfaceId& aOffScreenTarget, const TPoint& aOrigin,

	             MWsElement* aStart, MWsElement* aEnd, TRequestStatus* aCompleted);

	TInt AddElement(MWsElement* aElement, MWsElement* aAbove);

	void RemoveElement(MWsElement* aElement);

	void PauseCompositorIfNeeded();

	void ResumeCompositorIfPaused();

	void SetScreenRotation(MWsScene::TSceneRotation aRotation);

	MWsScene::TSceneRotation ScreenRotation() const;

	TSize ScreenSize() const;

	void Begin(const TRegion* aRegion);

	void End();	

	TBool CompositionDue ();

	void Compose(TRequestStatus* aCompleted);

	TInt FlushedSetConfiguration(const TDisplayConfiguration& aConfig);

    TBool WithinBeginEnd() { return iWithinBeginEnd; };

	CDisplayPolicy* DisplayPolicy();

    void FlushSceneElementChanges ();

    void RemoveElementFromSceneList(CElementWrapper* aElement);

    /*-------------------------------------------------------------------*//*

     * CBase interface implementation functions

     *//*-------------------------------------------------------------------*/

    //Standard symbian interface extension mechanism

    virtual TInt        Extension_              (TUint aExtensionId, TAny*& a0, TAny* a1);

    enum    TInternalExtensionGuids

        {   //These debug object interfaces need not be supported at runtime or on all platforms

        EExtensionDebugBackendGuid  =   0x1028589A,

        EExtensionDebugContextGuid  =   0x1028589B,

        EExtensionDebugDeviceGuid   =   0x1028589C,

        EExtensionDebugElementGuid  =   0x1028589D,

        EExtensionDebugSourceGuid   =   0x1028589E, //F still spare when this was written...

        };

    /**    Get Extension Interface.

     *  Implemented using the CBase::Extension_() mechanism 

     *  @param  aExtensionId    The GUID/ Well-known ID of the interface

     *  @return pointer to the interface or NULL if not available

     **/

    inline TAny* GetInterface(TUint aExtensionId);

    /** Get Extension Interface - templated helper.

     *  Resolves the ID and returned pointer based on the class name.

     *  Class name should support ETypeId intergral value, else use non-template version. 

     *  @param  MClass  The class of the interface with embedded GUID / Well known ID 

     *  @return pointer to the interface or NULL if not available

     **/

    template <class MClass> MClass* GetInterface()

    {

        return static_cast<MClass*>(GetInterface(MClass::ETypeId));

    }

    TInt RegisterSurface(const TSurfaceId& aSurface);

    TInt UnregisterSurface(const TSurfaceId& aSurface);

    void Compose(const TSurfaceId& aOffScreenTarget, TRequestStatus* aCompleted);

    virtual TBitFlags32 SupportedScreenRotations() const;

    void PauseComposition();

    void ResumeComposition ();

	/*-------------------------------------------------------------------*//*

	* MWsDisplayControl/MDisplayControlBase interface implementation functions

	*//*-------------------------------------------------------------------*/

    virtual TInt NumberOfResolutions()const ;

    virtual TInt GetResolutions(RArray<TResolution>& aResolutions)const ;

    virtual void GetConfiguration(TDisplayConfiguration& aConfig)const ;

    virtual TInt SetConfiguration(const TDisplayConfiguration& aConfig) ;

    virtual TInt PreferredDisplayVersion()const ;

    virtual void NotifyOnDisplayChange(TRequestStatus& aStatus);

    virtual void NotifyOnDisplayChangeCancel();

    virtual void NotifyOnConfigChange(TRequestStatus& aStatus);

    virtual void NotifyOnConfigChangeCancel();

    //"secret" methods available to element

    WFCDevice Device(){return iDevice;}

    WFCContext OnScreenContext()   {return iOnScreenContext;}

    WFCSource IncEltRefRegSource(const TSurfaceId& aHashKey); //<@return registered source handle or NULL if not registered

    TInt DecEltRefRegSource(const TSurfaceId& aHashKey); //<@return 0=destroyed, +ve count left, -ve error

    static TInt TranslateOpenWfcError(WFCErrorCode error);

    static void DestroyAllContextElements(WFCDevice dev, WFCContext ctx);

    RSurfaceManager& SurfaceManager(){return iSurfaceManager;}

    EGLDisplay Display(){return iEGLDisplay;}

private:

    COpenWfcWrapper(CDisplayPolicy* aDisplayPolicy);

	void ConstructL(TInt aScreenId);

	TInt AttachSurfaceToUiElement(CElementWrapper* aNewUiElement);

	void SetCompositionModified();

    static TUint32 HashFunction(const TSurfaceId& aHashKey);

    void  ComposeInternal(const TSurfaceId&  aOffScreenTarget,

                                 const TPoint&      aOrigin,

                                 MWsElement*      aStart,

                                 MWsElement*      aEnd,

                                 TRequestStatus*    aCompleted);

    TBool IsValidSurface(const TSurfaceId& aSurface);

private:

	TBool iPaused;

	TBool iWithinBeginEnd;

	TBool iCompositionModified;

	TBool iAllowCompositorPause;

	CElementWrapper* iUiElement1;

	CElementWrapper* iUiElement2;

	TSurfaceId iUiSurface;

	CDisplayPolicy* iDisplayPolicy;

private:

    class OffScreenComposeGuard;

    struct SourceAndRef

        {

        WFCSource source;

        TInt sourceRef;

        TInt elementRef;

        };

    RHashMap<TSurfaceId, SourceAndRef> iSourceMap;

    WFCDevice iDevice;

    WFCContext iOnScreenContext;

    EGLDisplay iEGLDisplay;

    WFCint iScreenNumber;

    static const TInt iInitialSourceMapSize = 0x0;

    CElementWrapper* iSceneElementList;      //all elements visible in the scene hierarchy

    CElementWrapper* iRemoveElementList;     //all elements removed from the scene hierarchy

    CElementWrapper* iCleanupElementList;    //all elements currently allocated are destroyed on cleanup

    COpenWfcJobManger* iJobManager;

    MWsScene::TSceneRotation iRotation;

    TBool iAutonomousCompositionInitiated;

    MDisplayControlBase* iContextDisplayControl;

    RSurfaceManager iSurfaceManager;

	};

inline TAny* COpenWfcWrapper::GetInterface(TUint aExtensionId)

    {

    TAny*   retVal=NULL;

    //Note that extension is intentionally not overloaded in CCompositionBackend

    if (this->Extension_(aExtensionId,retVal,NULL)<KErrNone)

        {

        return NULL;

        }

    else

        {

        return retVal;

        }

    }

#endif /*OPENWFCWRAPPER_H_*/