williamr@2: /*
williamr@2: * Copyright (c) 2003, 2004 Nokia Corporation and/or its subsidiary(-ies).
williamr@2: * All rights reserved.
williamr@2: * This component and the accompanying materials are made available
williamr@2: * under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members
williamr@2: * which accompanies this distribution, and is available
williamr@2: * at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".
williamr@2: *
williamr@2: * Initial Contributors:
williamr@2: * Nokia Corporation - initial contribution.
williamr@2: *
williamr@2: * Contributors:
williamr@2: *
williamr@2: * Description:  Exif tag wrapper 
williamr@2: *
williamr@2: */
williamr@2: 
williamr@2: 
williamr@2: 
williamr@2: #ifndef EXIFTAG_H
williamr@2: #define EXIFTAG_H
williamr@2: 
williamr@2: //  INCLUDES
williamr@2: #include <e32base.h>
williamr@2: 
williamr@2: // CONSTANTS
williamr@2: 
williamr@2: // MACROS
williamr@2: 
williamr@2: // DATA TYPES
williamr@2: 
williamr@2: // FUNCTION PROTOTYPES
williamr@2: 
williamr@2: // FORWARD DECLARATIONS
williamr@2: class TExifTagInfo;
williamr@2: 
williamr@2: // CLASS DECLARATION
williamr@2: 
williamr@2: /**
williamr@2: *  Interface class for handling Exif Tags. 
williamr@2: *  This class is used to get tag data from an Exif image.
williamr@2: *  @lib ExifLib
williamr@2: *  @since 2.6 
williamr@2: */
williamr@2: NONSHARABLE_CLASS( CExifTag ): public CBase
williamr@2:     {
williamr@2: 	public:  // Enumerations
williamr@2: 
williamr@2:         /**
williamr@2:         * Tag Data type enumeration.
williamr@2:         */
williamr@2:     	enum TExifTagDataType
williamr@2:             {
williamr@2:         	ETagByte = 1,
williamr@2:         	ETagAscii = 2,
williamr@2:         	ETagShort = 3,
williamr@2:         	ETagLong = 4,
williamr@2:         	ETagRational = 5,
williamr@2:         	ETagUndefined = 7,
williamr@2:         	ETagSlong = 9,
williamr@2:         	ETagSrational = 10
williamr@2:             };
williamr@2: 
williamr@2:     public:
williamr@2:         
williamr@2:         /**
williamr@2:         * Destructor.
williamr@2:         */
williamr@2:         virtual ~CExifTag();
williamr@2: 
williamr@2:     public: // New functions
williamr@2:         
williamr@2:         /**
williamr@2:         * Duplicate constructor. Creates an exact copy instance of the tag.
williamr@2:         * @since 2.6 
williamr@2:         * @param 
williamr@2:         * @return An instance of this class including the same contents of 
williamr@2:         * this instance.
williamr@2:         */
williamr@2:      	virtual CExifTag* DuplicateL() const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Returns the informative fields of a tag.
williamr@2:         * @since 2.6 
williamr@2:         * @param 
williamr@2:         * @return TExifTagInfo structure including informative fields of a tag
williamr@2:         */
williamr@2:     	virtual TExifTagInfo TagInfo() const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Returns data contents of a tag
williamr@2:         * @since 2.6 
williamr@2:         * @param 
williamr@2:         * @return Unmodifiable pointer to tag data.
williamr@2:         */
williamr@2:     	virtual TPtrC8 Data() const = 0;
williamr@2: 
williamr@2:     };
williamr@2: 
williamr@2: 
williamr@2: class TExifTagInfo
williamr@2:     {    
williamr@2:     public:  // Constructors and destructor
williamr@2: 
williamr@2:         IMPORT_C TExifTagInfo( 
williamr@2:             TUint16 aTagId, 
williamr@2:             CExifTag::TExifTagDataType aDataType, 
williamr@2:             TUint32 aDataCount );
williamr@2:     
williamr@2:     public:     // Data
williamr@2: 
williamr@2:         // Tag ID
williamr@2:     	TUint16 iId;
williamr@2: 
williamr@2:         // Tag data type
williamr@2:     	CExifTag::TExifTagDataType iDataType;
williamr@2: 
williamr@2:         // Number of tag data elements (having tag data type).
williamr@2:     	TUint32 iDataCount;
williamr@2:     };
williamr@2: 
williamr@2: #endif      // EXIFTAG_H   
williamr@2:             
williamr@2: // End of File