rgb4k216m.cpp

barcode readers [ from Image]

//
// Rgb4K216M
//   Pipeline stage converts a 12-bit per pixel RGB image to 24-bit per pixel.
//   Each 4-bit color value is shifted 4 bits to the left.
//
// 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 "Rgb4K216M.h"

#include "Debug.h"
#include "Image.h"
#include "ImageSize.h"
#include "Replicate.h"
#include "RGBImageIter.h"
#include "RGB12bppImageIter.h"

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

using namespace Core;

namespace Algorithm
{

	EXPORT_C CRgb4K216M* CRgb4K216M::NewL()
	{	
		return new (ELeave) CRgb4K216M();	
	}

	CRgb4K216M::~CRgb4K216M()
	{
	}

	CRgb4K216M::CRgb4K216M() :
		ibEmpty(true)
	{
	}

	CImage CRgb4K216M::FrontL() 
	{
		if (ibEmpty) {
			User::Leave(KErrGeneral);
			return CImage();
		}
		ibEmpty = true;
		return iImage;
	}

	void CRgb4K216M::PushL(CImage image)
	{
		IReplicate rRepl(image);
		rRepl.CastL(iImage, EColor16M);

		image.LockLC();
		IRgbImageIter rOutput(iImage);
		IRgb12bppImageIter rInput(image);
		for (; !rInput.End(); rInput.NextRow(), rOutput.NextRow()) {
			for (; !rInput.REnd(); rInput++, rOutput++) {
				rOutput[R] = rInput[R];
				rOutput[G] = rInput[G];
				rOutput[B] = rInput[B];
			}
		}
		CleanupStack::PopAndDestroy(); // unlock bitmaps
		CDebug::ShowImage(iImage);
		ibEmpty = false;
	}

	bool CRgb4K216M::Empty() const
	{
		return ibEmpty;
	}

};