/*

* Copyright (c) 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:  Implementation of FileImageExtJpg class.

*

*/

// INCLUDE FILES

#include "CIHLFileImageExtJpg.h"

#include "CIHLBitmap.h"

#include "IHLImplementationIds.h"

#include <IHLInterfaceIds.h>

#include <IclExtJpegApi.h>

// Private namespace for constants and functions

namespace

	{

	// Fixed scale factors

	enum TScaleFactors

		{

		EHalf		= 2,

		EQuarter	= 4,

		EEighth		= 8,

		};

	// Panic function

	_LIT( KIHLExtJpgPanic, "IHLImageExtJpg" );

	void Panic( TInt aPanicCode ) { User::Panic( KIHLExtJpgPanic, aPanicCode ); }

	}

// ============================ MEMBER FUNCTIONS ===============================

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

//

// C++ default constructor can NOT contain any code, that

// might leave.

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

CIHLFileImageExtJpg::CIHLFileImageExtJpg( TInt aImageIndex )

:CActive( CActive::EPriorityStandard ),

iImageIndex( aImageIndex )

    {

	CActiveScheduler::Add( this );

    }

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

//

// Two-phased constructor.

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

CIHLFileImageExtJpg* CIHLFileImageExtJpg::NewL( RFs& aFs, const TDesC8& aDataBuf,

                                    TInt aImageIndex, const TUint32 aOptions )

    {

    CIHLFileImageExtJpg* self = new (ELeave) CIHLFileImageExtJpg( aImageIndex );

	CleanupStack::PushL( self );

	self->ConstructL( aFs, aDataBuf, aOptions );

	CleanupStack::Pop(); // self

    return self;

    }

CIHLFileImageExtJpg* CIHLFileImageExtJpg::NewL( RFs& aFs, const TDesC& aFilename, 

									TInt aImageIndex, const TUint32 aOptions )

    {

    CIHLFileImageExtJpg* self = new (ELeave) CIHLFileImageExtJpg( aImageIndex );

	CleanupStack::PushL( self );

	self->ConstructL( aFs, aFilename, aOptions );

	CleanupStack::Pop(); // self

    return self;

    }

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

//

// Symbian constructor can leave.

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

void CIHLFileImageExtJpg::ConstructL( RFs& aFs, const TDesC& aFilename, const TUint32 /*aOptions*/ )

	{

	TRAPD( err,	iDecoder = CExtJpegDecoder::FileNewL( CExtJpegDecoder::EHwImplementation, aFs, aFilename ) );

	if ( err != KErrNone )

		{

		iDecoder = CExtJpegDecoder::FileNewL( CExtJpegDecoder::ESwImplementation, aFs, aFilename );

		}

	ConstructCommonL();

	}

void CIHLFileImageExtJpg::ConstructL( RFs& aFs, const TDesC8& aDataBuf, const TUint32 /*aOptions*/ )

    {

	TRAPD( err,	iDecoder = CExtJpegDecoder::DataNewL( CExtJpegDecoder::EHwImplementation, aFs, aDataBuf ) );

	if ( err != KErrNone )

		{

		iDecoder = CExtJpegDecoder::DataNewL( CExtJpegDecoder::ESwImplementation, aFs, aDataBuf );

		}

	ConstructCommonL();

    }

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

// CIHLFileImageExtJpg::ConstructCommonL

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

void CIHLFileImageExtJpg::ConstructCommonL()

    {

	// Check frame count and image index

	iImageCount = iDecoder->FrameCount();

	__ASSERT_ALWAYS( iImageCount > 0, User::Leave( KErrCorrupt ) );

	// Get image types

	iDecoder->ImageType( iImageIndex, iImageType, iImageSubType );

	__ASSERT_ALWAYS( iImageIndex >= 0 && iImageIndex < iImageCount, User::Leave( KErrArgument ) );

	// cache frame info and set scale sizes

	iFrameInfo = iDecoder->FrameInfo( iImageIndex );

	if( iFrameInfo.iFlags & TFrameInfo::EFullyScaleable )

		{

		iFullyScaleable = ETrue;

		}

    }

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

// Destructor

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

CIHLFileImageExtJpg::~CIHLFileImageExtJpg()

    {

	Cancel();

	delete iDecoder;

    }

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

// CIHLFileImageExtJpg::Type

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

TIHLInterfaceType CIHLFileImageExtJpg::Type() const

	{

	return TIHLInterfaceType( KIHLInterfaceIdFileImage,

							  KIHLImplementationIdFileImageExtJpg );

	}

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

// CIHLFileImageExtJpg::ImageType

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

const TUid& CIHLFileImageExtJpg::ImageType() const

	{

	return iImageType;

	}

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

// CIHLFileImageExtJpg::ImageSubType

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

const TUid& CIHLFileImageExtJpg::ImageSubType() const

	{

	return iImageSubType;

	}

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

// CIHLFileImageExtJpg::ImageIndex

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

TInt CIHLFileImageExtJpg::ImageIndex() const

	{

	return iImageIndex;

	}

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

// CIHLFileImageExtJpg::ImageCount

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

TInt CIHLFileImageExtJpg::ImageCount() const

	{

	return iImageCount;

	}

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

// CIHLFileImageExtJpg::Size

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

TSize CIHLFileImageExtJpg::Size() const

	{

	return iFrameInfo.iOverallSizeInPixels;

	}

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

// CIHLFileImageExtJpg::DisplayMode

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

TDisplayMode CIHLFileImageExtJpg::DisplayMode() const

	{

	TDisplayMode displayMode( iFrameInfo.iFrameDisplayMode );

	if( iFrameInfo.iFrameDisplayMode <= EGray256 )

		{

		displayMode = EGray256;

		}

	else if( iFrameInfo.iFrameDisplayMode <= EColor256 )

		{

		displayMode = EColor256;

		}

	return displayMode;

	}

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

// CIHLFileImageExtJpg::MaskDisplayMode

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

TDisplayMode CIHLFileImageExtJpg::MaskDisplayMode() const

	{

	if( iFrameInfo.iFlags & TFrameInfo::ETransparencyPossible )

		{

		if( iFrameInfo.iFlags & TFrameInfo::EAlphaChannel )

			{

			return EGray256;

			}

		return EGray2;

		}

	return ENone;

	}

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

// CIHLFileImageExtJpg::BackgroundColor

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

TRgb CIHLFileImageExtJpg::BackgroundColor() const

	{

	return iFrameInfo.iBackgroundColor;

	}

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

// CIHLFileImageExtJpg::CustomLoadSizeArray

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

const RArray<TSize>& CIHLFileImageExtJpg::CustomLoadSizeArray() const

	{

	return iLoadSizeArray;

	}

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

// CIHLFileImageExtJpg::IsFullyScaleable

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

TBool CIHLFileImageExtJpg::IsFullyScaleable() const

	{

	return iFullyScaleable;

	}

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

// CIHLFileImageExtJpg::IsAnimation

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

TBool CIHLFileImageExtJpg::IsAnimation() const

	{

	return iAnimation;

	}

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

// CIHLFileImageExtJpg::AnimationFrameCount

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

TInt CIHLFileImageExtJpg::AnimationFrameCount() const

	{

	return iAnimationFrameCount;

	}

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

// CIHLFileImageExtJpg::AnimationFrameDelay

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

TTimeIntervalMicroSeconds32 CIHLFileImageExtJpg::AnimationFrameDelay( TInt aAnimationFrameIndex ) const

	{

	//Animation is not supported

	( void ) aAnimationFrameIndex;

	Panic( KErrNotSupported );

	return 0; 

	}

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

// CIHLFileImageExtJpg::Load

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

TInt CIHLFileImageExtJpg::Load( TRequestStatus& aStatus, MIHLBitmap& aDestination, TInt aFrameIndex )

	{

	iImageIndex = aFrameIndex;

	return LoadRequest( aStatus, aDestination, iImageIndex );

	}

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

// CIHLFileImageExtJpg::Load

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

TInt CIHLFileImageExtJpg::Load( TRect aSrcRect, TRequestStatus& aStatus, MIHLBitmap& aDestination, TInt aFrameIndex )

	{

	TRAPD( err, SetCroppingL( aSrcRect ) );

	if( err )

		{

		return err;

		}

	iImageIndex = aFrameIndex;

	return LoadRequest( aStatus, aDestination, iImageIndex );

	}

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

// CIHLFileImageExtJpg::LoadAnimation

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

TInt CIHLFileImageExtJpg::LoadAnimation( TRequestStatus& aStatus, MIHLBitmap& aDestination,

							  TInt aAnimationFrameIndex )

	{

	//Animation is not supported

	( void ) aStatus;

	( void ) aDestination;

	( void ) aAnimationFrameIndex;

	Panic( KErrNotSupported );

	return 0;

	}

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

// CIHLFileImageExtJpg::IsBusy

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

TBool CIHLFileImageExtJpg::IsBusy() const

	{

	return ( iImageState != EInactive );

	}

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

// CIHLFileImageExtJpg::CancelLoad

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

void CIHLFileImageExtJpg::CancelLoad()

	{

	Cancel();

	}

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

// CIHLFileImageExtJpg::SetFilter

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

void CIHLFileImageExtJpg::SetFilter( MIHLFilter* /*aFilter*/ )

	{

	// Not in use

	}

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

// CIHLFileImageExtJpg::Decoder

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

const CExtJpegDecoder& CIHLFileImageExtJpg::Decoder() const

	{

	return *iDecoder;

	}

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

// CIHLFileImageExtJpg::DoCancel

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

void CIHLFileImageExtJpg::DoCancel()

	{

	iDecoder->Cancel();

	// Delete all processed bitmaps

	ErrorCleanup();

	// Complete with cancel

	iImageState = EInactive;

	RequestComplete( KErrCancel );

	}

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

// CIHLFileImageExtJpg::RunL

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

void CIHLFileImageExtJpg::RunL()

	{

	__ASSERT_DEBUG( iDestination, Panic( KErrGeneral ) );

	User::LeaveIfError( iStatus.Int() );

	switch( iImageState )

		{

		case EStartLoad:

			{

			// start loading the bitmaps

			StartLoadL();

			break;

			}

		case ECompleteLoad:

			{

			// complete loading the bitmaps

			CompleteLoadL();

			break;

			}

		default:

			{

			Panic( KErrTotalLossOfPrecision );

			}

		}

	}

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

// CIHLFileImageExtJpg::RunError

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

TInt CIHLFileImageExtJpg::RunError( TInt aError )

	{

	// Delete all processed bitmaps

	ErrorCleanup();

	// Complete with error

	iImageState = EInactive;

	RequestComplete( aError );

	return KErrNone;

	}

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

// CIHLFileImageExtJpg::LoadRequest

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

TInt CIHLFileImageExtJpg::LoadRequest( TRequestStatus& aStatus, MIHLBitmap& aDestination, TInt aFrameIndex )

	{

	if( IsBusy() )

		{

		return KErrNotReady;

		}

	if( aFrameIndex < 0 || aFrameIndex >= iDecoder->FrameCount() )

		{

		return KErrArgument;

		}

	const CFbsBitmap& dstBitmap = aDestination.Bitmap();

	if( !dstBitmap.Handle() )

		{

		return KErrArgument;

		}

	iImageStatus = &aStatus;

	*iImageStatus = KRequestPending;

	iDestination = static_cast<CIHLBitmap*>( &aDestination ); //lint !e826

	iFrameIndex = aFrameIndex;

	// Start the active object

	iImageState = EStartLoad;

	SelfComplete();

	return KErrNone;

	}

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

// CIHLFileImageExtJpg::StartLoadL

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

void CIHLFileImageExtJpg::StartLoadL()

	{

	CFbsBitmap& dstBitmap = iDestination->BitmapModifyable();

	CFbsBitmap& dstMask = iDestination->MaskModifyable();

	if( MaskDisplayMode() && dstMask.Handle() )

		{

		iDecoder->Convert( &iStatus, dstBitmap, dstMask, iFrameIndex );

		}

	else

		{

		dstMask.Reset();

		iDecoder->Convert( &iStatus, dstBitmap, iFrameIndex );

		}

	iImageState = ECompleteLoad;

	SetActive();

	}

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

// CIHLFileImageExtJpg::CompleteLoadL

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

void CIHLFileImageExtJpg::CompleteLoadL()

	{

	// Save source info destination

	iDestination->SetEditorPtr( this );

	iDestination->SetEditorValue( iFrameIndex );

	// Normal image ready

	iDestination = NULL;

	iImageState = EInactive;

	RequestComplete( KErrNone );

	}

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

// CIHLFileImageExtJpg::ErrorCleanup

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

void CIHLFileImageExtJpg::ErrorCleanup()

	{

	if( iDestination )

		{

		iDestination = NULL;

		}

	}

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

// CIHLFileImageExtJpg::SelfComplete

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

void CIHLFileImageExtJpg::SelfComplete()

	{

	SetActive();

	iStatus = KRequestPending;

	TRequestStatus* status = &iStatus;

	User::RequestComplete( status, KErrNone );

	}

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

// CIHLFileImageExtJpg::RequestComplete

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

void CIHLFileImageExtJpg::RequestComplete( TInt aReason )

	{

	ASSERT( iImageStatus );

	User::RequestComplete( iImageStatus, aReason );

	}

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

// CIHLFileImageExtJpg::SetCroppingL

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

void CIHLFileImageExtJpg::SetCroppingL( TRect aCropRect )

	{

	iDecoder->SetCroppingL( aCropRect );

	}

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

// CIHLFileImageExtJpg::SetStreamingL

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

void CIHLFileImageExtJpg::SetStreamingL( TSize& aMacroBlockSize )

	{

	iDecoder->SetStreamingL( aMacroBlockSize );

	}

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

// CIHLFileImageExtJpg::SetRotationL

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

void CIHLFileImageExtJpg::SetRotationL( TInt aDegree )

	{

	iDecoder->SetRotationL( aDegree );

	}