--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/collectionframework/thumbnailcreator/src/glxtnzoomedimagetask.cpp	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,257 @@
+/*
+* 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