--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/collectionframework/thumbnailcreator/src/glxtnsavethumbnailtask.cpp	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,245 @@
+/*
+* 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:    Thumbnail save task implementation
+*
+*/
+
+
+
+
+/**
+ * @internal reviewed 31/07/2007 by Simon Brooks
+ */
+
+// INCLUDE FILES
+
+#include "glxtnsavethumbnailtask.h"
+
+#include <glxassert.h>
+#include <glxtracer.h>
+#include <glxthumbnail.h>
+#include <imageconversion.h>
+#include <s32mem.h>
+
+#include "glxtnfileinfo.h"
+#include "mglxtnstorage.h"
+
+// Minimum size of thumbnail to be saved as JPEG rather than bitmap
+const TInt KGlxMinPixelsForJpeg = 30000;
+
+const TInt KGlxBitmapBufferGranularity = 1024;
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask
+// C++ default constructor can NOT contain any code, that might leave.
+// -----------------------------------------------------------------------------
+//
+CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask(const TGlxMediaId& aItemId,
+                    const TSize& aSize, MGlxtnThumbnailStorage* aStorage) :
+    CGlxtnTask(KGlxtnTaskIdSaveThumbnail, aItemId, aStorage), iSize(aSize)
+    {
+    TRACER("CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask()");
+    GLX_ASSERT_ALWAYS( aStorage, Panic( EGlxPanicIllegalArgument ),
+                        "CGlxtnSaveThumbnailTask created without storage" );
+
+    // Save task is always low priority
+    SetPriority(EPriorityLow);
+    }
+
+// -----------------------------------------------------------------------------
+// CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask
+// Constructor for derived classes.
+// -----------------------------------------------------------------------------
+//
+CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask(const TGlxtnTaskId& aId,
+                const TGlxMediaId& aItemId, MGlxtnThumbnailStorage* aStorage) :
+    CGlxtnTask(aId, aItemId, aStorage)
+    {
+    TRACER("CGlxtnSaveThumbnailTask::CGlxtnSaveThumbnailTask()");
+    GLX_ASSERT_ALWAYS( aStorage, Panic( EGlxPanicIllegalArgument ),
+                        "CGlxtnSaveThumbnailTask created without storage" );
+    }
+
+// -----------------------------------------------------------------------------
+// CGlxtnSaveThumbnailTask::ConstructL
+// Symbian 2nd phase constructor can leave.
+// -----------------------------------------------------------------------------
+//
+void CGlxtnSaveThumbnailTask::ConstructL(CGlxtnFileInfo* aFileInfo,
+                                            CFbsBitmap* aThumbnail)
+    {
+    TRACER("void CGlxtnSaveThumbnailTask::ConstructL()");
+    // Shouldn't create save task if client doesn't use storage
+    if ( !(Storage() && aFileInfo && aThumbnail) )
+        {
+        User::Leave(KErrArgument);
+        }
+
+    // Must not leave after taking ownership of these
+    iFileInfo = aFileInfo;
+    iThumbnail = aThumbnail;
+    }
+
+// -----------------------------------------------------------------------------
+// CGlxtnSaveThumbnailTask::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+CGlxtnSaveThumbnailTask* CGlxtnSaveThumbnailTask::NewL(
+                    const TGlxMediaId& aItemId,
+                    CGlxtnFileInfo* aFileInfo, const TSize& aSize,
+                    CFbsBitmap* aThumbnail, MGlxtnThumbnailStorage* aStorage)
+    {
+    TRACER("CGlxtnSaveThumbnailTask* CGlxtnSaveThumbnailTask::NewL()");
+    CGlxtnSaveThumbnailTask* self = new (ELeave) CGlxtnSaveThumbnailTask(
+                                                    aItemId, aSize, aStorage);
+    CleanupStack::PushL(self);
+    self->ConstructL(aFileInfo, aThumbnail);
+    CleanupStack::Pop( self );
+
+    return self;
+    }
+
+// Destructor
+CGlxtnSaveThumbnailTask::~CGlxtnSaveThumbnailTask()
+    {
+    TRACER("Destructor CGlxtnSaveThumbnailTask::~CGlxtnSaveThumbnailTask()");
+    delete iEncoder;
+    delete iThumbnail;
+    delete iData;
+    delete iFileInfo;
+    }
+
+// -----------------------------------------------------------------------------
+// DoStartL
+// -----------------------------------------------------------------------------
+//
+TBool CGlxtnSaveThumbnailTask::DoStartL(TRequestStatus& aStatus)
+    {
+    TRACER("CGlxtnSaveThumbnailTask::DoStartL()");
+    EncodeThumbnailL(aStatus);
+
+    return ETrue;
+    }
+
+// -----------------------------------------------------------------------------
+// DoCancel
+// -----------------------------------------------------------------------------
+//
+void CGlxtnSaveThumbnailTask::DoCancel()
+    {
+    TRACER("CGlxtnSaveThumbnailTask::DoCancel()");
+    if ( iEncoder )
+        {
+        iEncoder->Cancel();
+        }
+
+    Storage()->StorageCancel();
+    }
+
+// -----------------------------------------------------------------------------
+// DoRunL
+// -----------------------------------------------------------------------------
+//
+TBool CGlxtnSaveThumbnailTask::DoRunL(TRequestStatus& aStatus)
+    {
+    TRACER("TBool CGlxtnSaveThumbnailTask::DoRunL()");
+    if ( KErrNone == aStatus.Int() && EStateEncoding == iState )
+        {
+        SaveThumbnailL(aStatus);
+        return ETrue;
+        }
+
+    return EFalse;  // Task is complete
+    }
+
+// -----------------------------------------------------------------------------
+// DoRunError
+// -----------------------------------------------------------------------------
+//
+TBool CGlxtnSaveThumbnailTask::DoRunError(TInt /*aError*/)
+    {
+    TRACER("CGlxtnSaveThumbnailTask::DoRunError()");
+    delete iEncoder;
+    iEncoder = NULL;
+
+    return EFalse;  // Task is complete
+    }
+
+// -----------------------------------------------------------------------------
+// EncodeThumbnailL
+// -----------------------------------------------------------------------------
+//
+void CGlxtnSaveThumbnailTask::EncodeThumbnailL(TRequestStatus& aStatus)
+    {
+    TRACER("CGlxtnSaveThumbnailTask::EncodeThumbnailL()");
+    TSize size(iThumbnail->SizeInPixels());
+    User::LeaveIfError(iThumbnail->SetDisplayMode(KGlxThumbnailDisplayMode));
+
+    delete iData;
+    iData = NULL;
+
+    if ( KGlxMinPixelsForJpeg <= size.iWidth * size.iHeight )
+        {
+        // Encode as JPEG
+        iFormat = EGlxIDF_JPEG;
+        delete iEncoder;
+        iEncoder = NULL;
+        iEncoder = CImageEncoder::DataNewL(iData, CImageEncoder::EOptionNone,
+                                            KImageTypeJPGUid);
+        iState = EStateEncoding;
+        iEncoder->Convert(&aStatus, *iThumbnail);
+        }
+    else
+        {
+        // Externalise bitmap into buffer
+        iFormat = EGlxIDF_Bitmap;
+        CBufBase* buffer = CBufSeg::NewL(KGlxBitmapBufferGranularity);
+        CleanupStack::PushL(buffer);
+
+        RBufWriteStream stream(*buffer);
+        CleanupClosePushL(stream);
+        stream << *iThumbnail;
+        stream.CommitL();
+        CleanupStack::PopAndDestroy(&stream);
+
+        TInt length = buffer->Size();
+        iData = HBufC8::NewL(length);
+        TPtr8 ptr(iData->Des());
+        buffer->Read(0, ptr, length);
+
+        CleanupStack::PopAndDestroy(buffer);
+
+        SaveThumbnailL(aStatus);
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// SaveThumbnailL
+// -----------------------------------------------------------------------------
+//
+void CGlxtnSaveThumbnailTask::SaveThumbnailL(TRequestStatus& aStatus)
+    {
+    TRACER("CGlxtnSaveThumbnailTask::SaveThumbnailL()");
+    delete iEncoder;
+    iEncoder = NULL;
+
+    iState = EStateSaving;
+    Storage()->SaveThumbnailDataL(*iData, iFormat, ItemId(),
+                                    *iFileInfo, iSize, &aStatus);
+    }
+
+//  End of File