--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/activityfw/tsutils/inc/tsgraphicfilescalinghandler.h	Tue Aug 31 15:30:51 2010 +0300
@@ -0,0 +1,211 @@
+/*
+ * Copyright (c) 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 :
+ *
+ */
+#ifndef TSGRAPHICFILESCALINGHANDLER_H
+#define TSGRAPHICFILESCALINGHANDLER_H
+
+#ifndef __E32SVR_H__
+#define __E32SVR_H__
+#endif
+
+
+#ifndef SYMBIAN_ENABLE_PUBLIC_PLATFORM_HEADER_SPLIT
+#define SYMBIAN_ENABLE_PUBLIC_PLATFORM_HEADER_SPLIT
+#endif
+
+#include <bitmaptransforms.h>
+
+class CImageDecoder;
+class CFbsBitmap;
+
+/**
+ * Interface to observer contain
+ * ImageReadyCallBack function return error code and scaled/resized bitmap.
+ */
+class MImageReadyCallBack
+{
+public:
+    virtual void ImageReadyCallBack(TInt error, const CFbsBitmap *bitmap) = 0;
+};
+
+/**
+ * Class to scaling graphic file/s.
+ */
+class CTsGraphicFileScalingHandler : public CActive
+{
+public:
+    /**
+     * Kind of graphic file scaling.
+     * EIgnoreAspectRatio          - the file is scaled to size, aspect ratio isn't preserving.
+     * EKeepAspectRatio            - the file is scaled to a rectangle as large as possible inside size
+     *                               preserving the aspect ratio.
+     * EKeepAspectRatioByExpanding - the file is scaled to a rectangle as small as possible outside size
+     *                               preserving the aspect ratio.
+     */
+    enum TKindOfScaling
+    {
+       EIgnoreAspectRatio = 0,
+       EKeepAspectRatio = 1,
+       EKeepAspectRatioByExpanding = 2,
+    };
+
+private:
+    /**
+     * Active object current operation.
+     */
+    enum TCurrentOperation{
+        ENone = 0,
+        EConvertBitmapFromFile = 1,
+        EScale = 2
+    };
+
+public:
+    /**
+    * Destructor.
+    */
+    IMPORT_C ~CTsGraphicFileScalingHandler();
+
+    /**
+     * All constructors initialise active object asynchronous operation
+     * by calling ConstructL function.
+     * 1st group - decoding and scaling.
+     * 2nd group - scaling.
+     */
+
+    /**
+     * 1st group.
+     * Exported from dll constructors for activation graphic file scaling.
+     * aNotify        - reference to observer implementation.
+     * aFs            - reference to file server session.
+     * aFileName      - path to graphic file.
+     * aMimeType      - mime type of graphic file.
+     * aNewSize       - new size of output graphic file.
+     * aKindOfScaling - kind of graphic file scaling described above.
+     */
+    IMPORT_C static CTsGraphicFileScalingHandler* NewL(MImageReadyCallBack &aNotify,
+        RFs &aFs,
+        const TDesC &aFileName,
+        const TDesC8& aMimeType,
+        const TSize &aNewSize,
+        TKindOfScaling aKindOfScaling = CTsGraphicFileScalingHandler::EIgnoreAspectRatio);
+    IMPORT_C static CTsGraphicFileScalingHandler* NewLC(MImageReadyCallBack &aNotify,
+        RFs &aFs,
+        const TDesC &aFileName,
+        const TDesC8& aMimeType,
+        const TSize &aNewSize,
+        TKindOfScaling aKindOfScaling = CTsGraphicFileScalingHandler::EIgnoreAspectRatio);
+
+    /**
+     * 2nd group.
+     * Exported from dll constructors for activation graphic file scaling.
+     * aNotify         - reference to observer implementation.
+     * aImputFbsBitmap - reference to pattern CFbsBitmap.
+     * aNewSize        - new size of output graphic file.
+     * aKindOfScaling  - kind of graphic file scaling described above.
+     */
+    IMPORT_C static CTsGraphicFileScalingHandler* NewL(MImageReadyCallBack &aNotify,
+        const CFbsBitmap &aImputFbsBitmap,
+        const TSize &aNewSize,
+        TKindOfScaling aKindOfScaling = CTsGraphicFileScalingHandler::EIgnoreAspectRatio);
+     IMPORT_C static CTsGraphicFileScalingHandler* NewLC(MImageReadyCallBack &aNotify,
+        const CFbsBitmap &aImputFbsBitmap,
+        const TSize &aNewSize,
+        TKindOfScaling aKindOfScaling = CTsGraphicFileScalingHandler::EIgnoreAspectRatio);
+
+protected:
+     /**
+      * Cancels the wait for completion of an outstanding request.
+      */
+    void DoCancel();
+    /**
+     * Handles an active object’s request completion event.
+     */
+    void RunL();
+    /**
+     * Handles a leave occurring in the request completion event handler RunL().
+     */
+    TInt RunError(TInt);
+
+private:
+    /**
+     * Functions construct active objest instance and made asynchronous operation/s.
+     * Parameters - the same meaning as in appropriate NewL/NewLC functions.
+     */
+    void ConstructL(RFs &aFs, const TDesC &aFileName, const TDesC8& aMimeType);
+    void ConstructL(const CFbsBitmap &aImputFbsBitmap);
+    /**
+     * Private constructor.
+     * Parameters - the same meaning as in appropriate NewL/NewLC functions.
+     */
+    CTsGraphicFileScalingHandler(MImageReadyCallBack &aNotify,
+        const TSize &aNewSize,
+        TKindOfScaling aKindOfScaling = CTsGraphicFileScalingHandler::EIgnoreAspectRatio);
+    /**
+     * Action to made before decoding graphic file operation.
+     * Parameters - the same meaning as in appropriate NewL/NewLC functions.
+     */
+    void DecodingOperationL(RFs &aFs, const TDesC &aFileName, const TDesC8& aMimeType);
+    /**
+     * Action to made before scaling graphic file operation.
+     */
+    void ScalingOperationL();
+    /**
+     * Algorithm to determine output bitmap (returned in ImageReadyCallBack) size
+     * after scaling operation.
+     */
+    TSize NewSizeToScalingOperation();
+    /**
+     * Fix for TDisplayMode == EColor16MAP not supported by scaling operation!
+     * ! ! ! ADD OTHER NOT SUPPORTED DISPLAY MODES ! ! !
+     */
+    void FixForDisplayModeNotSupportedByScalingOperation();
+
+private:
+    /**
+     * Reference to observer implementation - return error code and output bitmap.
+     */
+    MImageReadyCallBack &mNotify;
+    /**
+     * Pointer to decoder used by decoding graphic file algorithm.
+     */
+    CImageDecoder *mImageDecoder;
+    /**
+     * Pointer to input bitmap - before decoding/scaling operation/s.
+     */
+    CFbsBitmap *mInputBitmap;
+    /**
+     * Pointer to output bitmap - returned in mNotify object.
+     */
+    CFbsBitmap *mOutputBitmap;
+    /**
+     * Pointer to CBitmapScaler calss used by scaling graphic file algorithm.
+     */
+    CBitmapScaler *mBitmapScaler;
+    /**
+     * New size of output graphic file.
+     */
+    TSize mNewSize;
+    /**
+     * Kind of graphic file scaling described above.
+     */
+    TBool mKindOfScaling;
+    /**
+     * Active object current operation.
+     */
+    TCurrentOperation mCurrentOperation;
+};
+
+#endif // TSGRAPHICFILESCALINGHANDLER_H