/*

* 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:    Task to generate a cropped thumbnail for a JPEG image.

*

*/

/**

 * @internal reviewed 31/07/2007 by Simon Brooks

 */

#include "glxtnzoomedimagetask.h"

#include <fbs.h>

#include <glxassert.h>

#include <glxlog.h>

#include <IclExtJpegApi.h>  // For CExtJpegDecoder

#include <glxtracer.h>

#include "glxtnfileinfo.h"

#include "glxtnfileutility.h"

#include "glxtnthumbnailrequest.h"

#include "mglxtnthumbnailcreatorclient.h"

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

// NewL

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

//

CGlxtnZoomedImageTask* CGlxtnZoomedImageTask::NewL(

        const TGlxThumbnailRequest& aRequestInfo,

        CGlxtnFileUtility& aFileUtility, MGlxtnThumbnailCreatorClient& aClient)

    {

    TRACER("CGlxtnZoomedImageTask* CGlxtnZoomedImageTask::NewL( const TGlxThumbnailRequest& aRequestInfo, CGlxtnFileUtility& aFileUtility, MGlxtnThumbnailCreatorClient& aClient)");

    CGlxtnZoomedImageTask* task = new (ELeave) CGlxtnZoomedImageTask(

                                        aRequestInfo, aFileUtility, aClient);

    CleanupStack::PushL(task);

    task->ConstructL(aRequestInfo.iBitmapHandle);

    CleanupStack::Pop( task );

    return task;

    }

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

// Destructor

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

//

CGlxtnZoomedImageTask::~CGlxtnZoomedImageTask()

    {

    TRACER("CGlxtnZoomedImageTask::~CGlxtnZoomedImageTask()");

    delete iDecoder;

    delete iInfo;

    delete iThumbnail;

    }

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

// Constructor

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

//

CGlxtnZoomedImageTask::CGlxtnZoomedImageTask(

                                    const TGlxThumbnailRequest& aRequestInfo,

                                    CGlxtnFileUtility& aFileUtility,

                                    MGlxtnThumbnailCreatorClient& aClient) :

    CGlxtnClientTask(KGlxtnTaskIdZoomedThumbnail, aRequestInfo.iId, aClient),

    iFileUtility(aFileUtility), iRequestedSize(aRequestInfo.iSizeClass),

    iCroppingRect(aRequestInfo.iCroppingRect), iFilter(aRequestInfo.iFilter),

    iDrmAllowed(aRequestInfo.iDrmAllowed)

    {

    TRACER("CGlxtnZoomedImageTask::CGlxtnZoomedImageTask( const TGlxThumbnailRequest& aRequestInfo, CGlxtnFileUtility& aFileUtility, MGlxtnThumbnailCreatorClient& aClient)");

    }

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

// ConstructL

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

//

void CGlxtnZoomedImageTask::ConstructL(TInt aBitmapHandle)

    {

    TRACER("void CGlxtnZoomedImageTask::ConstructL(TInt aBitmapHandle)");

    // Duplicate the client's bitmap

    iThumbnail = new (ELeave) CFbsBitmap();

    User::LeaveIfError(iThumbnail->Duplicate(aBitmapHandle));

    }

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

// DoStartL

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

//

TBool CGlxtnZoomedImageTask::DoStartL(TRequestStatus& aStatus)

    {

    TRACER("TBool CGlxtnZoomedImageTask::DoStartL(TRequestStatus& aStatus)");

    iInfo = new (ELeave) CGlxtnFileInfo;

    Client().FetchFileInfoL(iInfo, ItemId(), &aStatus);

    iState = EStateFetchingUri;

    return ETrue;

    }

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

// DoCancel

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

//

void CGlxtnZoomedImageTask::DoCancel()

    {

    TRACER("void CGlxtnZoomedImageTask::DoCancel()");

    if ( EStateFetchingUri == iState )

        {

        Client().CancelFetchUri(ItemId());

        }

    if ( iDecoder )

        {

        iDecoder->Cancel();

        }

    iFileUtility.ClearBadFileMarker();

    }

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

// DoRunL

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

//

TBool CGlxtnZoomedImageTask::DoRunL(TRequestStatus& aStatus)

    {

    TRACER("TBool CGlxtnZoomedImageTask::DoRunL(TRequestStatus& aStatus)");

    TInt error = aStatus.Int();

	TBool active = EFalse;

    if ( KErrNone == error )

        {

        switch ( iState )

            {

            case EStateFetchingUri:

                {

                User::LeaveIfNull(iInfo);

                iFileUtility.CheckBadFileListL( iInfo->FilePath() );

                TBool video;

                iInfo->IdentifyFileL(video, iProtected);

                if ( iProtected && !iDrmAllowed )

                    {

                    User::Leave(KErrAccessDenied);

                    }

                DecodePartialImageL(aStatus);

                active = ETrue;

                iState = EStateDecoding;

                }

                break;

            case EStateDecoding:

                // Nothing to do

                break;

            default:

                GLX_ASSERT_ALWAYS( EFalse, Panic( EGlxPanicIllegalState ),

                                "CGlxtnZoomedImageTask: Illegal state" );

                break;

            }

        }

    if ( !active )

        {

        iFileUtility.ClearBadFileMarker();

        Client().ThumbnailFetchComplete(ItemId(),

                                        EGlxThumbnailQualityHigh, error);

        }

    return active; 

    }

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

// DoRunError

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

//

TBool CGlxtnZoomedImageTask::DoRunError(TInt aError)

    {

    TRACER("TBool CGlxtnZoomedImageTask::DoRunError(TInt aError)");

    iFileUtility.ClearBadFileMarker();

    Client().ThumbnailFetchComplete(ItemId(), EGlxThumbnailQualityHigh, aError);

    return EFalse;

    }

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

// DecodePartialImageL

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

//

void CGlxtnZoomedImageTask::DecodePartialImageL(TRequestStatus& aStatus)

    {

    TRACER("void CGlxtnZoomedImageTask::DecodePartialImageL(TRequestStatus& aStatus)");

    TRAPD(err, CreateDecoderL(CExtJpegDecoder::EHwImplementation));

    if ( KErrNone != err )

        {

        CreateDecoderL(CExtJpegDecoder::ESwImplementation);

        }

    TSize sourceSize(iDecoder->FrameInfo().iOverallSizeInPixels);

    if ( 0 == sourceSize.iWidth || 0 == sourceSize.iHeight )

        {

        User::Leave(KErrCorrupt);

        }

    iCroppingRect.Intersection(TRect(sourceSize));

    if ( iCroppingRect.IsEmpty() )

        {

        User::Leave(KErrArgument);

        }

    // Find max scaling factor which won't make image smaller than target size

    TInt shift = 3;

    while ( shift

            && (sourceSize.iWidth >> shift) < iRequestedSize.iWidth

            && (sourceSize.iHeight >> shift) < iRequestedSize.iHeight )

        {

        shift--;

        }

    TInt fudge = (1 << shift) - 1;  // Used to "round up" the scaled values

    TSize loadSize((iCroppingRect.Width() + fudge) >> shift,

                    (iCroppingRect.Height() + fudge) >> shift);

    // Resize empty bitmap to required size

    User::LeaveIfError(iThumbnail->Resize(loadSize));

    iDecoder->SetCroppingL(iCroppingRect);

    iDecoder->Convert(&aStatus, *iThumbnail);

    }

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

// CreateDecoderL

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

//

void CGlxtnZoomedImageTask::CreateDecoderL(TInt aDecoderType)

    {

    TRACER("void CGlxtnZoomedImageTask::CreateDecoderL(TInt aDecoderType)");

    delete iDecoder;

    iDecoder = NULL;

    iDecoder = CExtJpegDecoder::FileNewL(

                    static_cast<CExtJpegDecoder::TDecoderType>(aDecoderType),

                    iFileUtility.FsSession(), iInfo->FilePath());

    if ( !(CExtJpegDecoder::ECapCropping & iDecoder->CapabilitiesL()) )

        {

        User::Leave(KErrNotSupported);

        }

    }

//  End of File