--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/svgtviewer/SvgtViewerPlugin/SVGCodecInc/SVGCodec.h Thu Sep 09 11:17:40 2010 +0300
@@ -0,0 +1,291 @@
+/*
+* Copyright (c) 2005 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: SVGT codec for reading the file header & data.
+*
+*/
+
+
+#ifndef SVGCODEC_H
+#define SVGCODEC_H
+
+#include <imagecodec.h>
+#include <imagedata.h>
+#include <SVGRequestObserver.h>
+#include <SVGListener.h>
+
+
+class CSvgEngineInterfaceImpl;
+class CFbsBitmap;
+class TFrameInfo;
+class TSVGFrameInfo;
+class MSvgError;
+class CGulIcon;
+
+// SVG Read codec.
+class CSvgReadCodec : public CImageProcessorReadCodec
+ ,public MSvgRequestObserver
+ , public MSvgLoadingListener
+
+ {
+public:
+ enum TDownloadNeeded
+ {
+ // The uri refers to a local image file
+ ELocalImageFile,
+ // The uri refers to a remote image file
+ ERemoteImageFile,
+ // The uri doesnt refer to an image file
+ ENotAnImageFile
+ };
+
+ enum TImagesLocation
+ {
+ EPhoneMemory,
+ EMemoryCard
+ };
+public:
+
+ /**
+ * Static constructor. Creates and returns a pointer to CSvgReadCodec
+ * @since 3.1
+ * @return Pointer to the read codec instance.
+ */
+ static CSvgReadCodec* NewL(const TSize& aSize);
+
+ /**
+ * Destructor.
+ */
+ virtual ~CSvgReadCodec();
+
+ /**
+ * Sets the SVG presentation data
+ * @since 3.1
+ * @param aFileData SVG presentation file data
+ */
+ void SetFileDataL( const TDesC8& aFileData );
+
+public: //From MSvgRequestObserver
+ void UpdateScreen();
+
+ TBool ScriptCall( const TDesC& aScript, CSvgElementImpl* aCallerElement );
+
+ TInt FetchImage( const TDesC& aUri, RFs& aSession, RFile& aFileHandle ) ;
+ TInt CSvgReadCodec::FetchFont( const TDesC& /* aUri */,
+ RFs& /* aSession */, RFile& /* aFileHandle */ );
+
+ void GetSmilFitValue( TDes& aSmilValue );
+
+ void UpdatePresentation( const TInt32& aNoOfAnimation );
+
+public: //User methods
+ void PrepareEngine();
+ TSize ContentSize() const;
+ void GenerateThumbnailL(CFbsBitmap* aFrame, CFbsBitmap* aFrameMask);
+ TDownloadNeeded IsDownloadNeededL( const TDesC& aUri ) const;
+ TBool GetLocalFile( const TDesC& aUri,
+ TDes& aFileName ,
+ const TDesC& aRefPath ) const;
+
+ HBufC* GetImagesPath( CSvgReadCodec::TImagesLocation aImagesLocation) const;
+
+protected:
+ // From CImageProcessorReadCodec
+ /**
+ * Performs initial processing of image data and mask bitmaps.
+ * @param aFrameInfo
+ A reference to a TFrameInfo object.
+ * @param aFrameImageData
+ A reference to a CFrameImageData object.
+ * @param aDisableErrorDiffusion
+ A flag indicating whether error diffusion should be disabled.
+ * @param aDestination
+ The destination bitmap.
+ * @param aDestinationMask
+ The destination mask bitmap.
+ */
+ virtual void InitFrameL(TFrameInfo& aFrameInfo, CFrameImageData& aFrameImageData, TBool aDisableErrorDiffusion, CFbsBitmap& aDestination, CFbsBitmap* aDestinationMask);
+
+ /**
+ * Processes the frame data contained in aSrc.
+ * This is a pure virtual function that each derived class must implement.
+ * @param aSrc
+ * A reference to the buffer containing the frame data.
+ *
+ * @return The current frame state after processing.
+ */
+
+ virtual TFrameState ProcessFrameL(TBufPtr8& aSrc);
+
+private:
+
+ /**
+ * Precesses the SVG presentation file data
+ */
+ void DoProcessL();
+
+ /**
+ * Default constructor
+ * @param aSize specifies the thubnail size
+ */
+ CSvgReadCodec(const TSize& aSize);
+
+ void ConstructL();
+ void InitializeEngineL();
+ /**
+ * Deletes the structures associated with the engine
+ * viz. The Frame List, Mask List, Delay Interval List,
+ * The DOM for the content and the Engine Implementation itself
+ */
+ void DeleteEngine();
+// From MSvgLoadingListener
+public:
+ /**
+ * Query the listener if every element is to be reported or only
+ * the children of <svg> tag.
+ *
+ * @since 1.0
+ * @return : ETrue if every element is to be reported, otherwise
+ * only the children of <svg> are reported.
+ */
+ TBool ReportAllElements();
+
+ /**
+ * Query the listener if client will call 'AssignImageData' to decode images
+ * separately from parsing. This is used to avoid non-thread-safe calls in
+ * creating bitmap and decoding images, which must be executed in the main thread.
+ *
+ * @since 1.0
+ * @return : ETrue to use 'ImageDataReference' instead of 'FetchImage'.
+ */
+ TBool WillAssignImageData();
+
+ /**
+ * Callback when the href:xlink attribute is encountered for the <image>
+ * element. This method is used to notify clients of image data references
+ * needed by <image> element. This method is called only when 'WillAssignImageData'
+ * returns ETrue.
+ *
+ * @since 1.0
+ * @return : none.
+ */
+ void ImageDataReference( const TDesC& aUri );
+
+ /**
+ * Notified when the start of a svg document(<svg> tag) is encountered.
+ *
+ * @since 1.0
+ * @return : For future use. Value is ignored.
+ */
+ TBool DocumentStart() ;
+
+ /**
+ * Notified when the end of a svg document(</svg> tag) is encountered.
+ *
+ * @since 1.0
+ * @return : For future use. Value is ignored.
+ */
+ TBool DocumentEnd();
+
+ /**
+ * Notified when the start of a svg element is encountered.
+ *
+ * @since 1.0
+ * @param : aTagName -- name of svg tag
+ * @param : aAttributeList -- attribute list.
+ * @return : For future use. Value is ignored.
+ */
+ TBool ElementStart( const TDesC& aTagName,
+ MSvgAttributeList& aAttributeList);
+
+ /**
+ * Notified when the end of a svg element is encountered.
+ * activated.
+ *
+ * @since 1.0
+ * @param : aTagName -- name of svg tag
+ * @return : For future use. Value is ignored.
+ */
+ TBool ElementEnd( const TDesC& aTagName );
+
+ /**
+ * Notified when an external data is needed by the svg document,
+ * such as a image-file or an embedded svg-file.
+ *
+ * @since 1.0
+ * @param : aUri -- URI string of external data
+ * @return : For future use. Value is ignored.
+ */
+ TBool ExternalDataRequested( const TDesC& aUri );
+
+ /**
+ * Notified when an external data has been retrieved,
+ * such as a image-file or an embedded svg-file.
+ *
+ * @since 1.0
+ * @param : aUri -- URI string of external data
+ * @return : For future use. Value is ignored.
+ */
+ TBool ExternalDataReceived( const TDesC& aUri );
+
+ /**
+ * Notified when an external data request has failed.
+ *
+ * @since 1.0
+ * @param : aUri -- URI string of external data
+ * @return : For future use. Value is ignored.
+ */
+ TBool ExternalDataRequestFailed( const TDesC& aUri );
+
+ /**
+ * Notified when an unsupported element is encountered.
+ *
+ * @since 1.0
+ * @param : aTagName -- tag name of element
+ * @param : aAttributeList -- attribute list.
+ * @return : For future use. Value is ignored.
+ */
+ TBool UnsupportedElement( const TDesC& aTagName,
+ MSvgAttributeList& aAttributeList );
+
+ void ImagesLoaded(TInt aError);
+ void GetNewDataPosition(TInt &aPosition, TInt &aLength);
+
+private: // Data
+ // Dummy Bitmap used by SVG Engine to render content.
+ CFbsBitmap* iSVGTBitMapDummy;
+
+ // SVG Engine Interface Implementation pointer
+ CSvgEngineInterfaceImpl* iSvgModule;
+
+ //Frame Array
+ RPointerArray<CFbsBitmap> iFrameList;
+ RPointerArray<CFbsBitmap> iMaskList;
+ RArray<TUint> iDelayList;
+
+ // SVG Thumbnail Handle
+ TInt iThumbnailHandle;
+
+ // SVGT content filename descriptor
+ HBufC8* iFileData;
+ TSize iContentSize;
+ MSvgError* iPrepareDomResult;
+
+ TBool iImagesPresent;
+
+ TBool iImagesLoaded;
+
+ TSize iOriginalSize;
+ };
+
+#endif //SVGCODEC_H