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

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

#ifdef ASTRA_CUDA

#include "astra/CudaSirtAlgorithm.h"

#include <boost/lexical_cast.hpp>
#include "astra/AstraObjectManager.h"

#include "../cuda/2d/sirt.h"

using namespace std;

namespace astra {

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

//----------------------------------------------------------------------------------------
// Constructor
CCudaSirtAlgorithm::CCudaSirtAlgorithm() 
{
	m_bIsInitialized = false;
	CCudaReconstructionAlgorithm2D::_clear();

	m_pMinMask = 0;
	m_pMaxMask = 0;
}

//----------------------------------------------------------------------------------------
// Destructor
CCudaSirtAlgorithm::~CCudaSirtAlgorithm() 
{
	// The actual work is done by ~CCudaReconstructionAlgorithm2D

	m_pMinMask = 0;
	m_pMaxMask = 0;
}

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

	m_bIsInitialized = CCudaReconstructionAlgorithm2D::initialize(_cfg);

	if (!m_bIsInitialized)
		return false;

	// min/max masks
	if (_cfg.self->hasOption("MinMaskId")) {
		int id = boost::lexical_cast<int>(_cfg.self->getOption("MinMaskId"));
		m_pMinMask = dynamic_cast<CFloat32VolumeData2D*>(CData2DManager::getSingleton().get(id));
	}
	CC.markOptionParsed("MinMaskId");
	if (_cfg.self->hasOption("MaxMaskId")) {
		int id = boost::lexical_cast<int>(_cfg.self->getOption("MaxMaskId"));
		m_pMaxMask = dynamic_cast<CFloat32VolumeData2D*>(CData2DManager::getSingleton().get(id));
	}
	CC.markOptionParsed("MaxMaskId");


	m_pAlgo = new astraCUDA::SIRT();
	m_bAlgoInit = false;

	return true;
}

//---------------------------------------------------------------------------------------
// Initialize - C++
bool CCudaSirtAlgorithm::initialize(CProjector2D* _pProjector,
                                     CFloat32ProjectionData2D* _pSinogram, 
                                     CFloat32VolumeData2D* _pReconstruction,
                                     int _iGPUindex, int _iDetectorSuperSampling,
                                     int _iPixelSuperSampling)
{
	m_bIsInitialized = CCudaReconstructionAlgorithm2D::initialize(_pProjector, _pSinogram, _pReconstruction, _iGPUindex, _iDetectorSuperSampling, _iPixelSuperSampling);

	if (!m_bIsInitialized)
		return false;

	

	m_pAlgo = new astraCUDA::SIRT();
	m_bAlgoInit = false;

	return true;
}

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

	if (!m_bAlgoInit) {
		// We only override the initialisation step to copy the min/max masks

		bool ok = setupGeometry();
		ASTRA_ASSERT(ok);

		ok = m_pAlgo->allocateBuffers();
		ASTRA_ASSERT(ok);

		if (m_pMinMask || m_pMaxMask) {
			const CVolumeGeometry2D& volgeom = *m_pReconstruction->getGeometry();
			astraCUDA::SIRT* pSirt = dynamic_cast<astraCUDA::SIRT*>(m_pAlgo);
			const float *pfMinMaskData = 0;
			const float *pfMaxMaskData = 0;
			if (m_pMinMask) pfMinMaskData = m_pMinMask->getDataConst();
			if (m_pMaxMask) pfMaxMaskData = m_pMaxMask->getDataConst();
			ok = pSirt->uploadMinMaxMasks(pfMinMaskData, pfMaxMaskData, volgeom.getGridColCount());
			ASTRA_ASSERT(ok);
		}

		m_bAlgoInit = true;
	}

	CCudaReconstructionAlgorithm2D::run(_iNrIterations);
}


} // namespace astra

#endif // ASTRA_CUDA