shortindex.h

barcode readers [ from Image]

//
// ShortIndex.h
//   Interface for indexing 16-bit images using [row][col].
//
// Copyright (C) 2003, 2006 by Jon A. Webb (Contact via GMail; username is jonawebb)
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//

#ifndef ShortIndex_h
#define ShortIndex_h

#include <e32cons.h>

namespace Core
{
	class IShortIndex
	{
		// Lifecycle
	public:
		IShortIndex(const CImage& image) :
			 inRowShorts(0),
			 ipData(NULL)
			{
				_LIT(LRShortErr, "IShortIndex: Not a short image");
				__ASSERT_ALWAYS(image.iBitmap.DisplayMode() == EColor64K, User::Panic(LRShortErr, KErrGeneral));
				ipData = (unsigned char*) image.iBitmap.DataAddress();
				inRowShorts = CFbsBitmap::ScanLineLength(image.iBitmap.SizeInPixels().iWidth, EColor64K) / 2;
			}

			IShortIndex() :
			 inRowShorts(0),
			 ipData(NULL)
		{}		


		inline ~IShortIndex(void) 
		{
		};

		IShortIndex(const IShortIndex& other) 
		{
			ipData = other.ipData;
			inRowShorts = other.inRowShorts;
		}

		// Operators
	public:
		IShortIndex& operator=(const IShortIndex& other) 
		{
			if (this != &other) {
				ipData = other.ipData;
				inRowShorts = other.inRowShorts;
			}
			return *this;
		}

		inline const unsigned short* operator[](unsigned int nRow) const {
			return ipData + nRow*inRowShorts;
		}
		inline unsigned short* operator[](unsigned int nRow) {
			return ipData + nRow*inRowShorts;
		}

	private:
		// Attributes
		unsigned char* ipData;
		unsigned int inRowShorts;
	};

};

#endif // ShortIndex_h