/*

* Copyright (c) 2004-2006 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:  Remote video handling class.

*

*/

#ifndef CVTENGDRAWDSA_H

#define CVTENGDRAWDSA_H

//  INCLUDES

#include "CVtEngRemoteVideo.h"

#include "TVtEngRenderConfigDSA.h"

// FORWARDS

class TDisplaySinkParamsDSA;

/**

*  Direct Screen Access drawer

*

*  @lib videoteleng.lib

*  @since Series 60 3.2

*/

NONSHARABLE_CLASS( CVtEngDrawDSA ) : public CVtEngRemoteVideo::CVtEngDraw,

    public MVtEngScalerObserver

    {

    public: // constructor and destructor

        /**

        * Two-phased constructor.

        * @param aObserver call back interface to Display Sink

        * @return instance of CVtEngDrawDSA

        */

        static CVtEngDrawDSA* NewL( MDisplaySinkObserver* aObserver );

        // Destructor

        ~CVtEngDrawDSA();

    private: // construction

        /**

        * C++ constructor as private.

        * @param aObserver callback interface for Display Sink

        */

        CVtEngDrawDSA( MDisplaySinkObserver* aObserver );

    private: // from CVtEngDraw

        /**

        * @see CVtEngDraw::BaseConstructL

        */

        void BaseConstructL();

        /**

        * @see CVtEngDraw::CreateSinkL

        */

        MDisplaySink* CreateSinkL();

        /**

        * @see CVtEngDraw::BaseRefreshL

        */

        void BaseRefreshL();

        /**

        * @see CVtEngDraw::BaseRefreshBitmapsL

        */

        void BaseRefreshBitmapsL();

        /**

        * @see CVtEngDraw::BaseDoCancel

        */

        void BaseDoCancel();

        /**

        * @see CVtEngDraw::BaseVerifyConfigL

        */

        void BaseVerifyConfigL();

        /**

        * @see CVtEngDraw::BaseRestartL

        */

        void BaseRestartL();

        /**

        * @see CVtEngDraw::BaseAbortNow

        */

        void BaseAbortNow();

        /**

        * @see CVtEngDraw::BaseStartDrawL

        */

        void BaseStartDrawL();

        /**

        * @see CVtEngDraw::BaseStopDraw

        */

        void BaseStopDraw();

        /**

        * @see CVtEngDraw::BaseSetConfigL

        */

        void BaseSetConfigL( const TVtEngRenderConfig& aConfig );

        /**

        * @see CVtEngDraw::BaseSetUIForegroundL

        */

        void BaseSetUIForegroundL( TBool aForeground );

        /**

        * @see CVtEngDraw::BaseVideoFrameSizeChangedL

        */

        void BaseVideoFrameSizeChangedL( const TSize& );

        /**

        * @see CVtEngDraw::BaseRequestLastFrame

        */        

        void BaseRequestLastFrame();

        /**

        * @see CVtEngDraw::Config

        */

        TVtEngRenderConfig& Config();

    private: // from CActive

        /**

        * Handles prepared bitmap from display sink.

        * @see CActive::RunL

        */

        void RunL();

     public: // from MVtEngScalerObserver

        /**

        * From MVtEngScalerObserver, this method is called when

        * scaling is finished.

        * @see MVtEngScalerObserver::ScalingCompleted

        */

        virtual void ScalingCompleted(

            CFbsBitmap* aBitmap, TInt aError );

    private: // New functions

        /**

        * Does the drawing.

        * @param aBitmap a bitmap to draw

        */

        void DrawBitmap( CFbsBitmap& aBitmap );

        /**

        * Fills TDisplaySinkParamsDSA struct

        */

        void GetSinkParams( TDisplaySinkParamsDSA& aSinkParams );

    private: // data

        // Bitmapts for remote video (double buffering).

        CFbsBitmap*          iBitmap1;

        CFbsBitmap*          iBitmap2;

        // Bitmap indexes indicating which.

        // bitmap was provided.

        MDisplaySink::TBitmapNo iBitmapNo;

        // If a bitmap has been set available.

        TBool                iBitmapSetAvail;

        // VT image scaler

        MVtEngImageScaler*   iImageScaler;

        // DSA configuration

        TVtEngRenderConfigDSA iConfig;

    };

#endif // CVTENGDRAWDSA_H