--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imaging/imagingfws/ExifUtility/inc/ExifGeneralConsts.h	Wed Aug 25 12:29:52 2010 +0300
@@ -0,0 +1,148 @@
+// Copyright (c) 2004-2009 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 __EXIFGENERALCONSTS_H__
+#define __EXIFGENERALCONSTS_H__
+
+#include <gdi.h>
+#include <iclexif.h>
+
+// Header file containing general constants used by the Exif Encoder and Decoder.
+
+// Constants for size.
+const TUint K32BitIntegerByteCount = 4;
+const TUint K16BitIntegerByteCount = 2;
+const TUint K8BitIntegerByteCount = 1;
+
+const TUint16 KApp1Marker = 0xE1FF; // The Application 1 marker (APP1).
+const TUint16 KApp1MarkerByteCount = K16BitIntegerByteCount; // Number of bytes in the APP1 marker.
+const TUint16 KBlockEndMarker = 0xD9FF; // The Application 1 marker (APP1).
+const TUint16 KBlockEndMarkerByteCount = K16BitIntegerByteCount; // Number of bytes in the APP1 marker.
+
+const TUint KOffsetToApp1Size = K16BitIntegerByteCount; // Two bytes in from the start of the Exif header.
+const TUint16 KApp1SizeLength = K16BitIntegerByteCount; // The byte count of the APP1 header length field.
+
+const TUint KExifMarker = 0x66697845; // 'Exif' string.
+const TUint16 KExifMarkerByteCount = K32BitIntegerByteCount; // i.e. number of bytes of 'Exif'
+const TUint16 KExifMarkerEnd = 0x0000; // Always follows 'Exif'.
+const TUint16 KExifMarkerEndByteCount = K16BitIntegerByteCount;
+const TInt KExifHeaderLength = K32BitIntegerByteCount + K16BitIntegerByteCount;
+
+const TUint16 KIntelByteAlignment = 0x4949; // Indicates little-endian byte alignment.
+const TUint16 KMotorolaByteAlignment = 0x4D4D;
+const TUint16 KByteAlignmentByteCount = K16BitIntegerByteCount;
+const TUint KByteCountToByteAlignment = KApp1MarkerByteCount +
+										KApp1SizeLength +
+										KExifHeaderLength; // Number of bytes from KApp1Marker through to KIntel.
+const TInt KOffsetFromExifHeaderToByteAlignment = KExifHeaderLength;
+
+const TUint16 KFortyTwo = 0x002A;
+const TUint16 KFortyTwoByteCount = K16BitIntegerByteCount;
+
+const TUint KIfdOffset = 0x00000008; // Offset to 0th IFD.
+const TUint16 KIfdOffsetByteCount = K32BitIntegerByteCount;
+const TUint KOffsetToFirstIfdSize = K32BitIntegerByteCount; // A 4 byte field containing an offset to the 1st Ifd.
+
+const TUint16 KMaxApp1Size = 0xFFFF; // Maximum size of the APP1 header.
+
+const TUint KSizeOfEntryCount = K16BitIntegerByteCount; // Each Ifd has an entry count of 2 bytes.
+
+const TInt KJPEGEncodedThumbnail = 6; //
+
+// External user will call functions using either of these two constants as the Ifd argument.
+const TInt16 KExternalZerothIfd = 0;
+const TInt16 KExternalFirstIfd = 1;
+
+const TInt KOffsetToZerothOffset = 	KByteAlignmentByteCount +
+									KFortyTwoByteCount +
+									KIfdOffsetByteCount +
+									KSizeOfEntryCount; // Number of bytes from byte alignment to the offset to the 0th Ifd.
+
+const TUint16 KExifFileHeaderLength = 	KApp1MarkerByteCount +
+										KApp1SizeLength +
+										KExifMarkerByteCount +
+										KExifMarkerEndByteCount +
+										KByteAlignmentByteCount + 
+										KFortyTwoByteCount + 
+										KIfdOffsetByteCount; // Length of the standard Exif Header.
+
+// Literals used in the encoder/decoder.										
+_LIT8(KUnicode, "UNICODE\0"); // The first 8 bytes of the User Comment tag, if using Unicode.
+_LIT8(KExifHeader, "Exif\0\0");
+
+const TInt KThumbnailHeight = 120;
+const TInt KThumbnailWidth = 160;
+const TDisplayMode KThumbnailDisplayMode= EColor256;
+const TInt KIOBlockSize=4096;	// size of blocks used for IO operations
+
+enum TIfd
+	{
+	EZeroth, // Main image.	
+	EExifSub, // Main image.
+	EInterop, // Main image.
+	EFirst, // Thumbnail.
+	EGpsSub = KExifGpsIfd >> 16 // (==4) Main image.		
+	};
+
+enum TTagValueIndexes
+	{
+	ETagValue,
+	EFormatValue,
+	EComponentCountValue,
+	EValueOffsetValue,
+	EIfdValue,
+	ESupportLevelValue
+	};
+	
+// Is the tag Mandatory, Optional or 
+enum TSupportLevel
+	{
+	EOptional,
+	EConditionallyMandatory,
+	EMandatory
+	};
+	
+// The format field in the Ifd entry is a two byte field, with an identifying short.
+enum TFormat
+	{
+	EByte = 1,
+	EAscii = 2,
+	EUnsignedShort = 3,
+	EUnsignedLong = 4,
+	EUnsignedRational = 5,
+	EUndefined = 7,
+	ESignedLong = 9,
+	ESignedRational = 10
+	};
+	
+// Related to TFormat. Stores size (in bytes) of each enumeration, i.e. EByte size is 1 byte, 
+// EUnsignedRational size is 8 bytes etc etc.
+const TInt KDataFormatSize[] = {0,1,1,2,4,8, 0,1, 0,4,8};
+const TUint KDataFormatSizeLength = sizeof(KDataFormatSize)/sizeof(KDataFormatSize[0]); // The length of the KDataFormatsize array.
+
+// Used by Ifd entry
+const TUint KMinimumIfdEntrySize = 12; // The number of bytes in a standard ifd entry.
+const TInt KSizeOfTagField = 2; // The number of bytes in the tag field.
+const TInt KSizeOfFormatField = 2; // The number of bytes in format field.
+const TInt KSizeOfComponentCountField = 4; // The number of bytes in the component count field.
+const TUint KSizeOfValueOffsetField = 4; // The number of bytes in the value/offset field.
+const TInt KSizeOfRational = 8; // The number of bytes in a rational number.
+const TInt KTagFieldPosition = 0;
+const TInt KFormatFieldPosition = 2; // The start position of the format field.
+const TInt KComponentCountFieldPosition = 4; // The start position of the component count field.
+const TInt KValueOffsetFieldPosition = 8; // The start position of the value/offset field.
+const TUint8 KThreeBytes = 3;
+
+#endif // __EXIFGENERALCONSTS_H__