/*

* Copyright (c) 2008-2008 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:  Internal image converter implementation

*

*/

#include <aknlayoutfont.h>

#include <aknutils.h>

#include <bitmaptransforms.h>

#include <coemain.h>

#include <gulicon.h>

#include <ihlbitmaputil.h>

#include <imageconversion.h>

#include <svgengineinterfaceimpl.h>

#include "irimageconverterimpl.h"

#include "irimageconverterobserver.h"

#include "irdebug.h"

// Image decoder options.

const CImageDecoder::TOptions KIRImageDecoderOptions = CImageDecoder::EOptionAlwaysThread;

// Bitmap scaler quality.

const CBitmapScaler::TQualityAlgorithm KIRBitmapScalerQualityAlgorithm = 

											CBitmapScaler::EMaximumQuality;

const TInt KFour=4;

// ---------------------------------------------------------------------------

// @see CIRImageConverter::NewL()

// ---------------------------------------------------------------------------

//

CIRImageConverterImpl* CIRImageConverterImpl::NewL()

    {

	IRLOG_DEBUG( "CIRImageConverterImpl::NewL - Entering" );

    CIRImageConverterImpl* self = new ( ELeave ) CIRImageConverterImpl;

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

// ---------------------------------------------------------------------------

// Constructor.

// ---------------------------------------------------------------------------

//

CIRImageConverterImpl::CIRImageConverterImpl()

    : CActive( CActive::EPriorityStandard ),

      iEnableAnimations( ETrue ),

      iMaintainAspectRatio( ETrue )

    {

    CActiveScheduler::Add( this );

    }

// ---------------------------------------------------------------------------

// Second-phase constructor.

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::ConstructL()

    {

	IRLOG_DEBUG( "CIRImageConverterImpl::ConstructL - entering" );

    iNotifyObserverCallBack = new ( ELeave ) CAsyncCallBack( 

        TCallBack( StaticNotifyObserverCallBack, this ), CActive::EPriorityHigh );

    }

// ---------------------------------------------------------------------------

// @see CIRImageConverter::~CIRImageConverter()

// ---------------------------------------------------------------------------

//

CIRImageConverterImpl::~CIRImageConverterImpl()

    {

    Cancel();

    iFrames.ResetAndDestroy();

    iFrames.Close();

    delete iDecoder;

    delete iScaler;

    delete iSvgEngine;

    delete iProcessedBitmap;

    delete iProcessedMask;

    delete iBitmap;

    delete iMask;

    delete iLastFrameBitmap;

    delete iLastFrameMask;

    delete iNotifyObserverCallBack;

    delete iFrameTimer;

    }

// ---------------------------------------------------------------------------

// @see CIRImageConverter::SetDataL( const TDesC8& aData )

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::SetDataL( const TDesC8& aData )

    {

    IRRDEBUG2( "CIRImageConverterImpl::SetDataL - Entering", KNullDesC );

    Cleanup( ETrue );

    iData.Set( aData );

    CreateDataHandlerL();

    IRRDEBUG2( "CIRImageConverterImpl::SetDataL - Exiting", KNullDesC );

   }

// ---------------------------------------------------------------------------

// @see CIRImageConverter::SetObserver( MIRImageConverterObserver* aObserver )

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::SetObserver( MIRImageConverterObserver* aObserver )

    {

    iObserver = aObserver;

    }

// ---------------------------------------------------------------------------

// @see CIRImageConverter::EnableAnimations( TBool aEnable )

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::EnableAnimations( TBool aEnable )

    {

    __ASSERT_DEBUG( iState == EIRStateIdle, User::Invariant() );

    iEnableAnimations = aEnable;

    }

// ---------------------------------------------------------------------------

// @see CIRImageConverter::IsAnimated() const

// ---------------------------------------------------------------------------

//

TBool CIRImageConverterImpl::IsAnimated() const

    {

    __ASSERT_DEBUG( iState != EIRStateIdle, User::Invariant() );

    return iIsAnimated;

    }

// ---------------------------------------------------------------------------

// @see CIRImageConverter::MaintainAspectRatio( TBool aMaintain )

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::MaintainAspectRatio( TBool aMaintain )

    {

    __ASSERT_DEBUG( iState == EIRStateIdle, User::Invariant() );

    iMaintainAspectRatio = aMaintain;

    }

// ---------------------------------------------------------------------------

// @see CIRImageConverter::StartL( const TSize& aTarget, TInt aId )

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::StartL( const TSize& aTarget, TInt aId )

	{

    IRRDEBUG2( "CIRImageConverterImpl::StartL - Entering", KNullDesC );

	if ( iState != EIRStateBitmapDecoderInitialized && iState != EIRStateSvgEngineInitialized )

		{

		if ( iState == EIRStateIdle )

			{

		    IRRDEBUG2("CIRImageConverterImpl::StartL, leave with KErrNotReady", KNullDesC);

			User::Leave( KErrNotReady );

			}

		else

			{

		    IRRDEBUG2("CIRImageConverterImpl::StartL, leave with KErrInUse", KNullDesC);

			User::Leave( KErrInUse );

			}

		}

	iTargetSize = aTarget;

	iId = aId;

	if ( iState == EIRStateSvgEngineInitialized )

		{

		// The SVG-T engine has been initialized with dummy 0x0 bitmaps, so updating those must be handled here.

	    IRRDEBUG2( "CIRImageConverterImpl::StartL - if begin", KNullDesC );

		CreateBitmapL( iTargetSize, iBitmap, iMask );

		iSvgEngine->SetFrameBuffer( iBitmap );

		iState = EIRStateConvertingSvg;

		iSvgEngine->Start();

		IRRDEBUG2( "CIRImageConverterImpl::StartL - if end", KNullDesC );

		}

	else

		{

	    IRRDEBUG2( "CIRImageConverterImpl::StartL - else begin", KNullDesC );

		iState = EIRStateConvertingBitmap;

		IRRDEBUG2( "CIRImageConverterImpl::StartL, iDecorder = %d", iDecoder);

		iDecoder->Convert( &iStatus, *iBitmap, *iMask );

		IRRDEBUG2( "CIRImageConverterImpl::StartL - else-exit call setactive", KNullDesC );

		SetActive();

		}

	IRRDEBUG2( "CIRImageConverterImpl::StartL - Exiting", KNullDesC );

	}

// ---------------------------------------------------------------------------

// @see CIRImageConverter::Stop()

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::Stop()

	{

    IRRDEBUG2( "CIRImageConverterImpl::Stop - Entering", KNullDesC );

	Cancel();

	if ( iSvgEngine )

	    {

	    iSvgEngine->Stop();

	    }

	TIRImageConverterState state = iState;

	Cleanup();

	if ( state != EIRStateIdle && state != EIRStateBitmapDecoderInitialized && 

		state != EIRStateSvgEngineInitialized )

	    {

	    NotifyObserver( KErrCancel );

	    }

	IRRDEBUG2( "CIRImageConverterImpl::Stop - Exiting",KNullDesC );

	}

// ---------------------------------------------------------------------------

// @see CIRImageConverter::Bitmap() const

// ---------------------------------------------------------------------------

//

const CFbsBitmap* CIRImageConverterImpl::Bitmap() const

    {

	IRLOG_DEBUG( "CIRImageConverterImpl::Bitmap - Entering" );

    return iProcessedBitmap;

    }

// ---------------------------------------------------------------------------

// @see CIRImageConverter::Mask() const

// ---------------------------------------------------------------------------

//

const CFbsBitmap* CIRImageConverterImpl::Mask() const

    {

	IRLOG_DEBUG( "CIRImageConverterImpl::Mask - Entering" );

    return iProcessedMask;

    }

// ---------------------------------------------------------------------------

// @see CIRImageConverter::TransferBitmapOwnership( CFbsBitmap*& aBitmap, CFbsBitmap*& aMask )

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::TransferBitmapOwnership( CFbsBitmap*& aBitmap, CFbsBitmap*& aMask )

    {

    aBitmap = iProcessedBitmap;

    iProcessedBitmap = NULL;

    aMask = iProcessedMask;

    iProcessedMask = NULL;

    }

// ---------------------------------------------------------------------------

// From class CActive.

// Invoked when the active object is cancelled.

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::DoCancel()

    {

	IRLOG_DEBUG( "CIRImageConverterImpl::DoCancel - Entering" );

    if ( iDecoder )

        {

        iDecoder->Cancel();

        }

    if ( iScaler )

        {

        iScaler->Cancel();

        }

	IRLOG_DEBUG( "CIRImageConverterImpl::DoCancel - Exiting" );

    }

// ---------------------------------------------------------------------------

// From class CActive.

// Invoked when the active object completes an asynchronous request.

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::RunL()

	{

	IRLOG_DEBUG( "CIRImageConverterImpl::RunL - Entering" );

	if ( iStatus.Int() == KErrNone )

		{

		switch ( iState )

			{

			case EIRStateConvertingBitmap:

				{

				if ( iIsAnimated && iEnableAnimations )

					{

					CGulIcon* icon = CGulIcon::NewLC();

					icon->SetBitmapsOwnedExternally( EFalse );

					icon->SetBitmap( iBitmap );

					icon->SetMask( iMask );

					iBitmap = NULL;

					iMask = NULL;

					iFrames.AppendL( icon );

					CleanupStack::Pop( icon );

					if ( iFrames.Count() < iDecoder->FrameCount() )

						{

						CreateBitmapL( iDecoder->FrameInfo( iFrames.Count() ).iOverallSizeInPixels,

								 iBitmap, iMask );

						iDecoder->Convert( &iStatus, *iBitmap, *iMask, iFrames.Count() );

						SetActive();

						}

					else

						{

						StartBitmapAnimationL();

						}

					}

				else

					{

					iState = EIRStateScalingBitmap;

					iScaler->Scale( &iStatus, *iBitmap, iTargetSize, iMaintainAspectRatio );

					SetActive();

					}

				}

			break;

			case EIRStateScalingBitmap:

			iState = EIRStateScalingBitmapMask;

			iScaler->Scale( &iStatus, *iMask, iTargetSize, iMaintainAspectRatio );

			SetActive();

			break;

			case EIRStateScalingBitmapMask:

			NotifyObserver( KErrNone );

			break;

			default:

			break;

			}

		}

	else

		{

		NotifyObserver( iStatus.Int() );

		}

	IRLOG_DEBUG( "CIRImageConverterImpl::RunL - Exiting" );

	}

// ---------------------------------------------------------------------------

// From class CActive.

// Invoked when RunL leaves.

// ---------------------------------------------------------------------------

//

TInt CIRImageConverterImpl::RunError( TInt aError )

    {

	IRLOG_DEBUG( "CIRImageConverterImpl::NewL - Entering" );

    NotifyObserver( aError );

    return KErrNone;

    }

// ---------------------------------------------------------------------------

// From class MSvgRequestObserver.

// Invoked when the bitmap has been updated by the SVG-T engine.

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::UpdateScreen()

    {

    iSvgEngine->GenerateMask( iMask );

    // SVG-T engine MUST NOT be destroyed here as its internal implementation

    // relies on it existing after execution leaves this method. This means

    // that the observer notification must be asynchronous

    NotifyObserver( KErrNone, EFalse );

    }

// ---------------------------------------------------------------------------

// From class MSvgRequestObserver.

// Not implemented.

// ---------------------------------------------------------------------------

//

TBool CIRImageConverterImpl::ScriptCall( const TDesC& /*aScript*/, CSvgElementImpl* 

											/*aCallerElement*/ )

    {

    return EFalse;

    }

// ---------------------------------------------------------------------------

// From class MSvgRequestObserver.

// Not implemented.

// ---------------------------------------------------------------------------

//

TInt CIRImageConverterImpl::FetchImage( const TDesC& /*aUri*/, RFs& /*aSession*/, RFile& 

																		/*aFileHandle*/ )

    {

    return KErrNone;

    }

// ---------------------------------------------------------------------------

// From class MSvgRequestObserver.

// Not implemented.

// ---------------------------------------------------------------------------

//

TInt CIRImageConverterImpl::FetchFont( const TDesC& /*aUri*/, RFs& /*aSession*/, RFile& 

																		/*aFileHandle*/ )

    {

    return KErrNone;

    }

// ---------------------------------------------------------------------------

// From class MSvgRequestObserver.

// Not implemented.

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::UpdatePresentation( const TInt32& /*aNoOfAnimation*/ )

    {

    }

// ---------------------------------------------------------------------------

// Performs cleanup on the converter object.

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::Cleanup( TBool aThorough )

    {

    Cancel();

    if ( aThorough )

        {

        delete iProcessedBitmap;

        iProcessedBitmap = NULL;

        delete iProcessedMask;

        iProcessedMask = NULL;

        }

    if(iDecoder)

	    {

	    delete iDecoder;

	    iDecoder = NULL;

	    }

    if(iScaler)

	    {

	    delete iScaler;

	    iScaler = NULL;

	    }

	if(iSvgEngine)

		{

	    delete iSvgEngine;

	    iSvgEngine = NULL;

		}

	if(iFrameTimer)

		{

	    delete iFrameTimer;

	    iFrameTimer = NULL;

		}

	if(iBitmap)

		{

	    delete iBitmap;

	    iBitmap = NULL;

		}

	if(iMask)

		{

	    delete iMask;

	    iMask = NULL;

		}

	if(iLastFrameBitmap)

		{

	    delete iLastFrameBitmap;

	    iLastFrameBitmap = NULL;

		}

	if(iLastFrameMask)

		{

	    delete iLastFrameMask;

	    iLastFrameMask = NULL;

		}

    iFrames.ResetAndDestroy();

    iNotifyObserverCallBack->Cancel();

    iFrameIndex = 0;

    iIsAnimated = EFalse;

    iError = KErrNone;

    iState = EIRStateIdle;

    }

// ---------------------------------------------------------------------------

// Creates the proper handler for the raw image data.

// ---------------------------------------------------------------------------

//

void CIRImageConverterImpl::CreateDataHandlerL()

    {

    IRRDEBUG2( "CIRImageConverterImpl::CreateDataHandlerL - Entering", KNullDesC );

    TBuf8<KMaxDataTypeLength> mimeType;

    TRAPD( err, CImageDecoder::GetMimeTypeDataL( iData, mimeType ) )

	if ( err == KErrNone ) // Image decoder can handle this MIME type.

		{

		TRAPD(err1,iDecoder = CImageDecoder::DataNewL( CCoeEnv::Static()->FsSession(), iData,

		KIRImageDecoderOptions );)

		if(err1!=KErrNone)

			{  

			if ( iObserver )

				{

			    IRRDEBUG2( "CIRImageConverterImpl::CreateDataHandlerL, err = %d", err1);

				NotifyObserver( err1 );

				IRRDEBUG2( "CIRImageConverterImpl::CreateDataHandlerL, error is notified", KNullDesC);

				}

			}

		else

			{

        iScaler = CBitmapScaler::NewL();

        iScaler->SetQualityAlgorithm( KIRBitmapScalerQualityAlgorithm );

        iScaler->UseLowMemoryAlgorithm( ETrue ); // Return value ignored on purpose; it's ok if low memory algorithm cannot be used when scaling.

        if ( iDecoder->FrameCount() > 1 )

            {

            iFrameTimer = CPeriodic::NewL( CActive::EPriorityStandard );

            iIsAnimated = ETrue;

            }

        CreateBitmapL( iDecoder->FrameInfo().iOverallSizeInPixels, iBitmap, iMask );

        }

		}

    else // Try using the SVG-T engine for decoding the image.

        {

        TFontSpec fontSpec = AknLayoutUtils::LayoutFontFromId( 

        						EAknLogicalFontSecondaryFont )->FontSpecInTwips();

        // The SVG-T engine requires that the bitmap is created prior to its instantiation.

        // As the dummy bitmaps created here are 0x0, StartL must take care of instantiating them to

        // proper sizes and updating the SVG-T engine's frame buffer manually before starting the conversion.

        CreateBitmapL( TSize( 0, 0 ), iBitmap, iMask );

        iSvgEngine = CSvgEngineInterfaceImpl::NewL( iBitmap, this, fontSpec );

        MSvgError* svgErr = iSvgEngine->Load( iData );

        if ( svgErr && svgErr->HasError() )

            {

            err = svgErr->SystemErrorCode();

            }

        else