--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/collectionframework/thumbnailcreator/src/glxtnloadthumbnailtask.cpp	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,213 @@
+/*
+* 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:    Base class for tasks which load thumbnails
+*
+*/
+
+
+
+
+#include "glxtnloadthumbnailtask.h"
+
+#include <glxassert.h>
+#include <glxtracer.h>
+#include <glxlog.h>
+#include <glxthumbnail.h>
+#include <imageconversion.h>
+#include <s32mem.h>
+
+#include "glxtnfileinfo.h"
+#include "glxtnfileutility.h"
+#include "glxtnimagedecoderfactory.h"
+#include "glxtnthumbnailrequest.h"
+#include "mglxtnstorage.h"
+
+
+
+// ---------------------------------------------------------------------------
+// Constructor
+// ---------------------------------------------------------------------------
+//
+CGlxtnLoadThumbnailTask::CGlxtnLoadThumbnailTask( const TGlxtnTaskId& aId,
+                                    const TGlxThumbnailRequest& aRequestInfo,
+                                    CGlxtnFileUtility& aFileUtility,
+                                    MGlxtnThumbnailCreatorClient& aClient) :
+    CGlxtnClientTask( aId, aRequestInfo.iId, aClient ),
+    iFileUtility( aFileUtility ), iRequestedSize( aRequestInfo.iSizeClass ),
+    iDrmAllowed( aRequestInfo.iDrmAllowed )
+    {
+    TRACER("CGlxtnLoadThumbnailTask::CGlxtnLoadThumbnailTask()");
+    }
+
+// ---------------------------------------------------------------------------
+// Destructor
+// ---------------------------------------------------------------------------
+//
+CGlxtnLoadThumbnailTask::~CGlxtnLoadThumbnailTask() 
+    {
+    TRACER("CGlxtnLoadThumbnailTask::~CGlxtnLoadThumbnailTask()");
+    delete iDecoder;
+    delete iThumbnail;
+    delete iThumbData;
+    delete iInfo;
+    }
+
+// -----------------------------------------------------------------------------
+// ConstructL
+// -----------------------------------------------------------------------------
+//
+void CGlxtnLoadThumbnailTask::ConstructL( TInt aBitmapHandle )
+    {
+    TRACER("void CGlxtnLoadThumbnailTask::ConstructL()");
+    // Duplicate the client's bitmap
+    iThumbnail = new (ELeave) CFbsBitmap();
+    User::LeaveIfError( iThumbnail->Duplicate( aBitmapHandle ) );
+    }
+
+// ---------------------------------------------------------------------------
+// DoCancel
+// ---------------------------------------------------------------------------
+//
+void CGlxtnLoadThumbnailTask::DoCancel()
+    {
+    TRACER("void CGlxtnLoadThumbnailTask::DoCancel()");
+    if ( iDecoder )
+        {
+        iDecoder->Cancel();
+        }
+
+    Storage()->StorageCancel();
+    }
+
+// ---------------------------------------------------------------------------
+// LoadThumbnailL
+// ---------------------------------------------------------------------------
+//
+TBool CGlxtnLoadThumbnailTask::LoadThumbnailL( TRequestStatus& aStatus )
+    {
+    TRACER("TBool CGlxtnLoadThumbnailTask::LoadThumbnailL()");
+    GLX_ASSERT_DEBUG( iInfo, Panic( EGlxPanicNullPointer ), "No file info" );
+
+    if ( Storage() && iFileUtility.IsPersistentSize( iRequestedSize ) )
+        {
+        Storage()->LoadThumbnailDataL( iThumbData, iFormat, ItemId(),
+                                    *iInfo, iRequestedSize, &aStatus );
+        iState = EStateLoading;
+
+        return ETrue;
+        }
+
+    return EFalse;
+    }
+
+// ---------------------------------------------------------------------------
+// HandleLoadedThumbnailL
+// ---------------------------------------------------------------------------
+//
+TBool CGlxtnLoadThumbnailTask::HandleLoadedThumbnailL(TRequestStatus& aStatus)
+    {
+    TRACER("CGlxtnLoadThumbnailTask::HandleLoadedThumbnailL()");
+	TBool active = EFalse;
+
+    User::LeaveIfNull( iThumbData );
+
+    switch ( iFormat )
+        {
+        case EGlxIDF_Bitmap:
+            {
+            CFbsBitmap* bitmap = new (ELeave) CFbsBitmap;
+            CleanupStack::PushL( bitmap );
+
+            RDesReadStream stream( *iThumbData );
+            CleanupClosePushL( stream );
+            stream >> *bitmap;
+            CleanupStack::PopAndDestroy( &stream );
+
+            User::LeaveIfError( iThumbnail->Resize( bitmap->SizeInPixels() ) );
+
+            CFbsBitmapDevice* device = CFbsBitmapDevice::NewL( iThumbnail );
+            CleanupStack::PushL( device );
+            CFbsBitGc* context = NULL;
+            User::LeaveIfError( device->CreateContext( context ) );
+            CleanupStack::PushL( context );
+
+            context->BitBlt( TPoint(), bitmap );
+
+            CleanupStack::PopAndDestroy( context ); 
+            CleanupStack::PopAndDestroy( device );
+
+            CleanupStack::PopAndDestroy( bitmap );
+            }
+            break;
+
+    	case EGlxIDF_JPEG:
+            iDecoder = GlxtnImageDecoderFactory::NewL(
+                                    iFileUtility.FsSession(), *iThumbData );
+            DecodeThumbnailL( aStatus, EFalse );
+            active = ETrue;
+            break;
+
+        default:
+            User::Leave( KErrNotSupported );
+            break;
+        }
+
+    return active;
+    }
+
+// ---------------------------------------------------------------------------
+// DecodeThumbnailL
+// ---------------------------------------------------------------------------
+//
+void CGlxtnLoadThumbnailTask::DecodeThumbnailL( TRequestStatus& aStatus,
+                                                TBool /*aScaleBitmap*/ )
+    {
+    TRACER("CGlxtnLoadThumbnailTask::DecodeThumbnailL()");
+    GLX_ASSERT_DEBUG( iDecoder, Panic( EGlxPanicNullPointer ), "No decoder" );
+
+    // Resize empty bitmap to required size
+    TSize thumbSize( iDecoder->FrameInfo().iOverallSizeInPixels );
+    GLX_DEBUG3("CGlxtnLoadThumbnailTask::DecodeThumbnailL() thumbSize w(%d) h(%d)", 
+            thumbSize.iWidth, thumbSize.iHeight);
+   
+    // Always adjust the target bitmap size 
+	// as Exif thumbnail could be bigger in size
+    TSize targetSize = iRequestedSize;
+    if( (thumbSize.iWidth <= targetSize.iWidth ) && 
+	    (thumbSize.iHeight <= targetSize.iHeight ) )
+         {
+         targetSize.iWidth  = thumbSize.iWidth;
+         targetSize.iHeight = thumbSize.iHeight;
+         }
+    else if ( targetSize.iHeight * thumbSize.iWidth
+             < targetSize.iWidth * thumbSize.iHeight )
+         {
+         // Source has taller aspect than target so reduce target width
+         targetSize.iWidth =  ( ( targetSize.iHeight * thumbSize.iWidth )
+                                 / (  thumbSize.iHeight ) );
+         }
+    else
+         {
+         // Source has wider aspect than target so reduce target height
+         targetSize.iHeight = (targetSize.iWidth * thumbSize.iHeight)
+                                 / thumbSize.iWidth;
+         }
+    GLX_DEBUG3("CGlxtnLoadThumbnailTask::DecodeThumbnailL() targetSize w(%d) h(%d)", 
+            targetSize.iWidth, targetSize.iHeight);
+     
+    User::LeaveIfError( iThumbnail->Resize(targetSize) );
+
+    iDecoder->Convert( &aStatus, *iThumbnail );
+    iState = EStateDecodingThumbnail;
+    }