rgb64k216m.cpp

barcode readers [ from Image]

//
// Rgb64K216M
//   Pipeline stage converts a 16-bit per pixel RGB image to 24-bit per pixel.
//
// 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
//

#include "Rgb64K216M.h"

#include "Debug.h"
#include "Image.h"
#include "ImageSize.h"
#include "Replicate.h"
#include "RGBImageIter.h"
#include "ShortImageIter.h"

#include <e32std.h>
#include <fbs.h>

using namespace Core;

namespace Algorithm
{

	EXPORT_C CRgb64K216M* CRgb64K216M::NewL()
	{	
		return new (ELeave) CRgb64K216M();	
	}

	CRgb64K216M::~CRgb64K216M()
	{
	}

	CRgb64K216M::CRgb64K216M() :
		ibEmpty(true)
	{
	}

	CImage CRgb64K216M::FrontL() 
	{
		if (ibEmpty) {
			User::Leave(KErrGeneral);
			return CImage();
		}
		ibEmpty = true;
		return iImage;
	}

	void CRgb64K216M::PushL(CImage image)
	{
		IReplicate rRepl(image);
		rRepl.CastL(iImage, EColor16M);

		image.LockLC();
		IRgbImageIter rRgb(iImage);
		IShortImageIter rShort(image);

		for (; !rShort.End(); rShort.NextRow(), rRgb.NextRow()) {
			for (; !rShort.REnd(); rShort++, rRgb++) {
				// pixel layout for EColor64K is R=6 bits, G=6 bits, B=5 bits
				unsigned char r = (unsigned char) ((rShort() & 0xf800) >> 8);
				unsigned char g = (unsigned char) ((rShort() & 0x07e0) >> 3);
				unsigned char b = (unsigned char) ((rShort() & 0x001f) << 3);
				rRgb[R] = r;
				rRgb[G] = g;
				rRgb[B] = b;
			}
		}
		CleanupStack::PopAndDestroy(); // unlock bitmaps
		CDebug::ShowImage(iImage);
		ibEmpty = false;
	}

	bool CRgb64K216M::Empty() const
	{
		return ibEmpty;
	}

};