/*
-----------------------------------------------------------------------
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/>.

-----------------------------------------------------------------------
$Id$
*/

#include "astra/CudaBackProjectionAlgorithm3D.h"

#include <boost/lexical_cast.hpp>

#include "astra/AstraObjectManager.h"

#include "astra/ConeProjectionGeometry3D.h"
#include "astra/ParallelProjectionGeometry3D.h"
#include "astra/ParallelVecProjectionGeometry3D.h"
#include "astra/ConeVecProjectionGeometry3D.h"

#include "../cuda/3d/astra3d.h"

using namespace std;

namespace astra {

// type of the algorithm, needed to register with CAlgorithmFactory
std::string CCudaBackProjectionAlgorithm3D::type = "BP3D_CUDA";

//----------------------------------------------------------------------------------------
// Constructor
CCudaBackProjectionAlgorithm3D::CCudaBackProjectionAlgorithm3D() 
{
	m_bIsInitialized = false;
	m_iGPUIndex = -1;
	m_iVoxelSuperSampling = 1;
	m_bSIRTWeighting = false;
}

//----------------------------------------------------------------------------------------
// Constructor with initialization
CCudaBackProjectionAlgorithm3D::CCudaBackProjectionAlgorithm3D(CProjector3D* _pProjector, 
								   CFloat32ProjectionData3DMemory* _pProjectionData, 
								   CFloat32VolumeData3DMemory* _pReconstruction)
{
	_clear();
	initialize(_pProjector, _pProjectionData, _pReconstruction);
}

//----------------------------------------------------------------------------------------
// Destructor
CCudaBackProjectionAlgorithm3D::~CCudaBackProjectionAlgorithm3D() 
{
	CReconstructionAlgorithm3D::_clear();
}


//---------------------------------------------------------------------------------------
// Check
bool CCudaBackProjectionAlgorithm3D::_check()
{
	// check base class
	ASTRA_CONFIG_CHECK(CReconstructionAlgorithm3D::_check(), "BP3D_CUDA", "Error in ReconstructionAlgorithm3D initialization");


	return true;
}

//---------------------------------------------------------------------------------------
// Initialize - Config
bool CCudaBackProjectionAlgorithm3D::initialize(const Config& _cfg)
{
	ASTRA_ASSERT(_cfg.self);
	ConfigStackCheck<CAlgorithm> CC("CudaBackProjectionAlgorithm3D", this, _cfg);	

	// if already initialized, clear first
	if (m_bIsInitialized) {
		clear();
	}

	// initialization of parent class
	if (!CReconstructionAlgorithm3D::initialize(_cfg)) {
		return false;
	}

	m_iGPUIndex = (int)_cfg.self->getOptionNumerical("GPUindex", -1);
	CC.markOptionParsed("GPUindex");
	m_iVoxelSuperSampling = (int)_cfg.self->getOptionNumerical("VoxelSuperSampling", 1);
	CC.markOptionParsed("VoxelSuperSampling");

	CFloat32ProjectionData3DMemory* pSinoMem = dynamic_cast<CFloat32ProjectionData3DMemory*>(m_pSinogram);
	ASTRA_ASSERT(pSinoMem);
	const CProjectionGeometry3D* projgeom = pSinoMem->getGeometry();
const CParallelProjectionGeometry3D* par3dgeom = dynamic_cast<const CParallelProjectionGeometry3D*>(projgeom);
	const CParallelVecProjectionGeometry3D* parvec3dgeom = dynamic_cast<const CParallelVecProjectionGeometry3D*>(projgeom);
	if (parvec3dgeom || par3dgeom) {
		// This option is only supported for Par3D currently
		m_bSIRTWeighting = _cfg.self->getOptionBool("SIRTWeighting", false);
		CC.markOptionParsed("SIRTWeighting");
	}

	// success
	m_bIsInitialized = _check();
	return m_bIsInitialized;
}

//----------------------------------------------------------------------------------------
// Initialize - C++
bool CCudaBackProjectionAlgorithm3D::initialize(CProjector3D* _pProjector, 
								  CFloat32ProjectionData3DMemory* _pSinogram, 
								  CFloat32VolumeData3DMemory* _pReconstruction)
{
	// if already initialized, clear first
	if (m_bIsInitialized) {
		clear();
	}

	// required classes
	m_pProjector = _pProjector;
	m_pSinogram = _pSinogram;
	m_pReconstruction = _pReconstruction;

	// success
	m_bIsInitialized = _check();
	return m_bIsInitialized;
}

//---------------------------------------------------------------------------------------
// Information - All
map<string,boost::any> CCudaBackProjectionAlgorithm3D::getInformation() 
{
	map<string, boost::any> res;
	return mergeMap<string,boost::any>(CAlgorithm::getInformation(), res);
};

//---------------------------------------------------------------------------------------
// Information - Specific
boost::any CCudaBackProjectionAlgorithm3D::getInformation(std::string _sIdentifier) 
{
	return CAlgorithm::getInformation(_sIdentifier);
};

//----------------------------------------------------------------------------------------
// Iterate
void CCudaBackProjectionAlgorithm3D::run(int _iNrIterations)
{
	// check initialized
	ASTRA_ASSERT(m_bIsInitialized);

	CFloat32ProjectionData3DMemory* pSinoMem = dynamic_cast<CFloat32ProjectionData3DMemory*>(m_pSinogram);
	ASTRA_ASSERT(pSinoMem);
	CFloat32VolumeData3DMemory* pReconMem = dynamic_cast<CFloat32VolumeData3DMemory*>(m_pReconstruction);
	ASTRA_ASSERT(pReconMem);

	const CProjectionGeometry3D* projgeom = pSinoMem->getGeometry();
	const CConeProjectionGeometry3D* conegeom = dynamic_cast<const CConeProjectionGeometry3D*>(projgeom);
	const CParallelProjectionGeometry3D* par3dgeom = dynamic_cast<const CParallelProjectionGeometry3D*>(projgeom);
	const CConeVecProjectionGeometry3D* conevecgeom = dynamic_cast<const CConeVecProjectionGeometry3D*>(projgeom);
	const CParallelVecProjectionGeometry3D* parvec3dgeom = dynamic_cast<const CParallelVecProjectionGeometry3D*>(projgeom);
	const CVolumeGeometry3D& volgeom = *pReconMem->getGeometry();

	if (conegeom) {
		astraCudaConeBP(pReconMem->getData(), pSinoMem->getDataConst(),
		                volgeom.getGridColCount(),
		                volgeom.getGridRowCount(),
		                volgeom.getGridSliceCount(),
		                conegeom->getProjectionCount(),
		                conegeom->getDetectorColCount(),
		                conegeom->getDetectorRowCount(),
		                conegeom->getOriginSourceDistance(),
		                conegeom->getOriginDetectorDistance(),
		                conegeom->getDetectorSpacingX(),
		                conegeom->getDetectorSpacingY(),
		                conegeom->getProjectionAngles(),
		                m_iGPUIndex, m_iVoxelSuperSampling);
	} else if (par3dgeom) {
		if (!m_bSIRTWeighting) {
			astraCudaPar3DBP(pReconMem->getData(), pSinoMem->getDataConst(),
			                 volgeom.getGridColCount(),
			                 volgeom.getGridRowCount(),
			                 volgeom.getGridSliceCount(),
			                 par3dgeom->getProjectionCount(),
			                 par3dgeom->getDetectorColCount(),
			                 par3dgeom->getDetectorRowCount(),
			                 par3dgeom->getDetectorSpacingX(),
			                 par3dgeom->getDetectorSpacingY(),
			                 par3dgeom->getProjectionAngles(),
			                 m_iGPUIndex, m_iVoxelSuperSampling);
		} else {
			astraCudaPar3DBP_SIRTWeighted(pReconMem->getData(),
			                 pSinoMem->getDataConst(),
			                 volgeom.getGridColCount(),
			                 volgeom.getGridRowCount(),
			                 volgeom.getGridSliceCount(),
			                 par3dgeom->getProjectionCount(),
			                 par3dgeom->getDetectorColCount(),
			                 par3dgeom->getDetectorRowCount(),
			                 par3dgeom->getDetectorSpacingX(),
			                 par3dgeom->getDetectorSpacingY(),
			                 par3dgeom->getProjectionAngles(),
			                 m_iGPUIndex, m_iVoxelSuperSampling);
		}
	} else if (parvec3dgeom) {
		if (!m_bSIRTWeighting) {
			astraCudaPar3DBP(pReconMem->getData(), pSinoMem->getDataConst(),
			                 volgeom.getGridColCount(),
			                 volgeom.getGridRowCount(),
			                 volgeom.getGridSliceCount(),
			                 parvec3dgeom->getProjectionCount(),
			                 parvec3dgeom->getDetectorColCount(),
			                 parvec3dgeom->getDetectorRowCount(),
			                 parvec3dgeom->getProjectionVectors(),
			                 m_iGPUIndex, m_iVoxelSuperSampling);
		} else {
			astraCudaPar3DBP_SIRTWeighted(pReconMem->getData(),
			                 pSinoMem->getDataConst(),
			                 volgeom.getGridColCount(),
			                 volgeom.getGridRowCount(),
			                 volgeom.getGridSliceCount(),
			                 parvec3dgeom->getProjectionCount(),
			                 parvec3dgeom->getDetectorColCount(),
			                 parvec3dgeom->getDetectorRowCount(),
			                 parvec3dgeom->getProjectionVectors(),
			                 m_iGPUIndex, m_iVoxelSuperSampling);
		}
	} else if (conevecgeom) {
		astraCudaConeBP(pReconMem->getData(), pSinoMem->getDataConst(),
		                volgeom.getGridColCount(),
		                volgeom.getGridRowCount(),
		                volgeom.getGridSliceCount(),
		                conevecgeom->getProjectionCount(),
		                conevecgeom->getDetectorColCount(),
		                conevecgeom->getDetectorRowCount(),
		                conevecgeom->getProjectionVectors(),
		                m_iGPUIndex, m_iVoxelSuperSampling);
	} else {
		ASTRA_ASSERT(false);
	}

}


} // namespace astra