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+/*
+-----------------------------------------------------------------------
+Copyright 2012 iMinds-Vision Lab, University of Antwerp
+
+Contact: astra@ua.ac.be
+Website: http://astra.ua.ac.be
+
+
+This file is part of the
+All Scale Tomographic Reconstruction Antwerp Toolbox ("ASTRA Toolbox").
+
+The ASTRA Toolbox is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+The ASTRA Toolbox 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>.
+
+-----------------------------------------------------------------------
+$Id$
+*/
+
+#ifndef _INC_ASTRA_CUDACGLSALGORITHM3D
+#define _INC_ASTRA_CUDACGLSALGORITHM3D
+
+#include "Globals.h"
+#include "Config.h"
+
+#include "Algorithm.h"
+
+#include "Float32ProjectionData3DMemory.h"
+#include "Float32VolumeData3DMemory.h"
+#include "ReconstructionAlgorithm3D.h"
+
+#ifdef ASTRA_CUDA
+
+namespace astra {
+
+class AstraCGLS3d;
+
+/**
+ * \brief
+ * This class contains the 3D implementation of the CGLS algorithm
+ *
+ */
+class _AstraExport CCudaCglsAlgorithm3D : public CReconstructionAlgorithm3D {
+
+protected:
+
+	/** Check the values of this object.  If everything is ok, the object can be set to the initialized state.
+	 * The following statements are then guaranteed to hold:
+	 * - no NULL pointers
+	 * - all sub-objects are initialized properly
+	 * - the projector is compatible with both data objects
+	 */
+	virtual bool _check();
+
+public:
+	
+	// type of the algorithm, needed to register with CAlgorithmFactory
+	static std::string type;
+	
+	/** Default constructor, does not initialize the object.
+	 */
+	CCudaCglsAlgorithm3D();
+
+	/** Constructor with initialization.
+	 *
+	 * @param _pProjector		Projector Object.
+	 * @param _pProjectionData	ProjectionData3D object containing the projection data.
+	 * @param _pReconstruction	VolumeData3D object for storing the reconstructed volume.
+	 */
+	CCudaCglsAlgorithm3D(CProjector3D* _pProjector, 
+	                     CFloat32ProjectionData3DMemory* _pProjectionData, 
+	                     CFloat32VolumeData3DMemory* _pReconstruction);
+	
+	/** Copy constructor.
+	 */
+	CCudaCglsAlgorithm3D(const CCudaCglsAlgorithm3D&);
+
+	/** Destructor.
+	 */
+	virtual ~CCudaCglsAlgorithm3D();
+
+	/** Clear this class.
+	 */
+/*	virtual void clear();*/
+
+	/** Initialize the algorithm with a config object.
+	 *
+	 * @param _cfg Configuration Object
+	 * @return initialization successful?
+	 */
+	virtual bool initialize(const Config& _cfg);
+
+	/** Initialize class.
+	 *
+	 * @param _pProjector		Projector Object.
+	 * @param _pProjectionData	ProjectionData3D object containing the projection data.
+	 * @param _pReconstruction	VolumeData3D object for storing the reconstructed volume.
+	 * @return initialization successful?
+	 */
+	bool initialize(CProjector3D* _pProjector, 
+					CFloat32ProjectionData3DMemory* _pSinogram, 
+					CFloat32VolumeData3DMemory* _pReconstruction);
+
+	/** Get all information parameters
+	 *
+	 * @return map with all boost::any object
+	 */
+	virtual map<string,boost::any> getInformation();
+
+	/** Get a single piece of information represented as a boost::any
+	 *
+	 * @param _sIdentifier identifier string to specify which piece of information you want
+	 * @return boost::any object
+	 */
+	virtual boost::any getInformation(std::string _sIdentifier);
+
+	/** Perform a number of iterations.
+	 *
+	 * @param _iNrIterations amount of iterations to perform.
+	 */
+	virtual void run(int _iNrIterations = 0);
+
+	/** Get a description of the class.
+	 *
+	 * @return description string
+	 */
+	virtual std::string description() const;
+
+	/**  
+	 * Sets the index of the used GPU index: first GPU has index 0
+	 *
+	 * @param _iGPUIndex New GPU index.
+	 */
+	void setGPUIndex(int _iGPUIndex);
+
+
+	virtual void signalAbort();
+
+	/** Get the norm of the residual image.
+	 *  Only a few algorithms support this method.
+	 *
+	 * @param _fNorm if supported, the norm is returned here
+	 * @return true if this operation is supported
+	 */
+	virtual bool getResidualNorm(float32& _fNorm);
+
+protected:
+
+	AstraCGLS3d* m_pCgls;
+
+	int m_iGPUIndex;
+	bool m_bAstraCGLSInit;
+	int m_iDetectorSuperSampling;
+	int m_iVoxelSuperSampling;
+};
+
+// inline functions
+inline std::string CCudaCglsAlgorithm3D::description() const { return CCudaCglsAlgorithm3D::type; };
+
+} // end namespace
+
+#endif
+
+#endif