sequence.h

barcode readers [ from Image]

//
// Sequence.h
//   Sequence combines pipeline stages in a sequence.
//   Add() adds another pipeline stage to the end of the sequence.
//   Push() pushes into the first pipeline stage, and then pushes any output
//   from that stage into the next, continuing until each stage but the last
//   is empty.
//
// 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 Sequence_h
#define Sequence_h

#include "PipelineStage.h"

#include <e32cons.h>

namespace Core
{
	class CSequence :
		public MPipelineStage
	{
	public:
		IMPORT_C static CSequence* NewL(MPipelineStage*);
		~CSequence(void);
	private:
		CSequence(MPipelineStage*);

		// Operations
	public:
		IMPORT_C void AddL(MPipelineStage*);

		///////////////////// Overrides ////////////////////////
		//
		// Overrides from MPipelineStage:
		//
			// Operations
		public:
			CImage FrontL();
			void PushL(CImage);

			// Accessors
		public:
			bool Empty() const;

		//
		//
		/////////////////// End of overrides ///////////////////

	private:
		// Attributes
		MPipelineStage* iPipe1;
		CSequence* iPipe2;
	};
};

#endif // Sequence_h