--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/viewframework/texturemanager/inc/glxbitmapdecoderwrapper.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,144 @@
+/*
+* 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:    Texture Manager component/Decodes the Image in step for large images
+ *
+*/
+
+
+
+
+#ifndef C_GLXBITMAPDECODERWRAPPER_H
+#define C_GLXBITMAPDECODERWRAPPER_H
+
+// INCLUDE FILES
+#include<alf/alftimedvalue.h>
+#include <IclExtJpegApi.h>  // For CExtJpegDecoder
+
+/**
+ * Observer interface used to be notified when texture bitmap   is completed.
+ */
+NONSHARABLE_CLASS( MGlxBitmapDecoderObserver )
+        {
+        public:
+            /**
+             * Called when the content of the texture is changed.
+             * @param aHasContent Whether the texture now has content.
+             */
+            virtual void HandleBitmapDecodedL(TInt aThumbnailIndex,CFbsBitmap* aBitmap) = 0;
+        };
+/**
+ * This class does the decoding of the images in steps depending on the size of the images .
+ * this is a wrapper class, doesn't actually decode the images.
+ */
+
+class CGlxBitmapDecoderWrapper: public CActive
+    {
+public:
+    /*This Enums specifies the state of the Decoding*/
+    enum TDecoderState
+        {
+        ESTate0, ESTate1,ESTateFinal
+        };  
+    /*This Enums specifies the size of the images*/
+    enum TImageLevel
+        {
+        ELevel0, ELevel1,ELevel2
+        }; 
+    /**
+     * Two-phased constructor
+     * @param aObserver:The Observer contains the CGlxTextureManagerImpl Object
+     * @return Constructed object
+     */
+    static CGlxBitmapDecoderWrapper* NewL(MGlxBitmapDecoderObserver* aObserver);
+
+    /**
+     * Destructor
+     */
+    ~CGlxBitmapDecoderWrapper();
+
+    /**
+     * intiates the Decoding the Image and updates the no:of steps to decode
+     * @param aSourceFileName :contains the file name
+     * @param aindex:contains the index value
+     */
+    void DoDecodeImageL(const TDesC & aSourceFileName,TInt aIndex);
+
+    /**
+     * starts the decoding and updates the state of the decoding
+     */
+    void DecodeImageL();
+    /**
+     * Request free memory with Out of Memory Monitor
+     * @param aBytesRequested : Request for free memory in Bytes
+     */
+    TInt OOMRequestFreeMemoryL( TInt aBytesRequested);
+
+public:    
+    /**
+     * Standard Active object functions
+     * */
+    virtual void RunL();
+    virtual void DoCancel();
+
+private:
+    /*
+     * Constructor
+     * */
+    CGlxBitmapDecoderWrapper();
+    
+    /*
+     *Second-phase constuction 
+     * */
+    void ConstructL(MGlxBitmapDecoderObserver* aObserver);
+    /*
+     * Get the orientation of the file
+     * This API reads the Exif tag in an image and returns the orientation of that Image 
+     */
+    TUint16 GetOrientationL(const TDesC& aFileName) ;
+    /*
+     * Get the Rotation Angle and Mirroring status of the image so as to set it on the decoder 
+     * This API calculates the rotation angle and the Mirroring status required by the decoder
+     * @param aOrientation Orientation of the image.
+     * @param aRotAngle Rotation angle to be set on the image decoder.
+     * @param aFlipStatus Mirroring status for the decoder if 1 then mirroring should be set.
+     * Internally it also sets the iOriginalSize to the required size
+     */
+    void GetRotationParameters(TUint16 aOrientation, TInt& aRotAngle, TBool& aFlipStatus) ;
+
+private:    
+    /* Contains the TextureManagerImpl object,calls the HandleBitmapDecoded*/
+    MGlxBitmapDecoderObserver* iObserver;
+    /*Specifies the Decoder */
+    CImageDecoder*          iImageDecoder; // decoder from ICL API
+    /*Contains the Thumbnail Index*/
+    TInt iThumbnailIndex;
+    /*Contains the Bitmap generated*/
+    CFbsBitmap* iBitmap;
+    /*contains the original size of the image*/
+    TAlfRealSize iOriginalSize;
+    /*A handle to a file server session.*/ 
+    RFs iFs;
+    /*Specifies the state of decoding ,if it is in initial level(3MP), Middlelevel(6MP) or final level*/
+    TDecoderState iDecoderState;
+    /*Specifies the size of teh image and levels to decode*/
+    TImageLevel   iImageLevel;
+#ifdef _DEBUG
+    
+    TTime iDecodeProcessstartTime;
+    TTime iStartTime;
+    TTime iStopTime;
+#endif
+    };
+
+#endif //C_GLXBITMAPDECODERWRAPPER_H