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diff --git a/cuda/3d/mem3d.cu b/cuda/3d/mem3d.cu
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+/*
+-----------------------------------------------------------------------
+Copyright: 2010-2015, iMinds-Vision Lab, University of Antwerp
+ 2014-2015, CWI, Amsterdam
+
+Contact: astra@uantwerpen.be
+Website: http://sf.net/projects/astra-toolbox
+
+This file is part of the 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 <cstdio>
+#include <cassert>
+
+#include "util3d.h"
+
+#include "mem3d.h"
+
+#include "astra3d.h"
+#include "cone_fp.h"
+#include "cone_bp.h"
+#include "par3d_fp.h"
+#include "par3d_bp.h"
+
+#include "astra/Logging.h"
+
+
+namespace astraCUDA3d {
+
+
+struct SMemHandle3D_internal
+{
+ cudaPitchedPtr ptr;
+ unsigned int nx;
+ unsigned int ny;
+ unsigned int nz;
+};
+
+size_t availableGPUMemory()
+{
+ size_t free, total;
+ cudaError_t err = cudaMemGetInfo(&free, &total);
+ if (err != cudaSuccess)
+ return 0;
+ return free;
+}
+
+MemHandle3D allocateGPUMemory(unsigned int x, unsigned int y, unsigned int z, Mem3DZeroMode zero)
+{
+ SMemHandle3D_internal hnd;
+ hnd.nx = x;
+ hnd.ny = y;
+ hnd.nz = z;
+
+ size_t free = availableGPUMemory();
+
+ cudaError_t err;
+ err = cudaMalloc3D(&hnd.ptr, make_cudaExtent(sizeof(float)*x, y, z));
+
+ if (err != cudaSuccess) {
+ return MemHandle3D();
+ }
+
+ size_t free2 = availableGPUMemory();
+
+ ASTRA_DEBUG("Allocated %d x %d x %d on GPU. (Pre: %lu, post: %lu)", x, y, z, free, free2);
+
+
+
+ if (zero == INIT_ZERO) {
+ err = cudaMemset3D(hnd.ptr, 0, make_cudaExtent(sizeof(float)*x, y, z));
+ if (err != cudaSuccess) {
+ cudaFree(hnd.ptr.ptr);
+ return MemHandle3D();
+ }
+ }
+
+ MemHandle3D ret;
+ ret.d = boost::shared_ptr<SMemHandle3D_internal>(new SMemHandle3D_internal);
+ *ret.d = hnd;
+
+ return ret;
+}
+
+bool freeGPUMemory(MemHandle3D handle)
+{
+ size_t free = availableGPUMemory();
+ cudaError_t err = cudaFree(handle.d->ptr.ptr);
+ size_t free2 = availableGPUMemory();
+
+ ASTRA_DEBUG("Freeing memory. (Pre: %lu, post: %lu)", free, free2);
+
+ return err == cudaSuccess;
+}
+
+bool copyToGPUMemory(const float *src, MemHandle3D dst, const SSubDimensions3D &pos)
+{
+ ASTRA_DEBUG("Copying %d x %d x %d to GPU", pos.subnx, pos.subny, pos.subnz);
+ ASTRA_DEBUG("Offset %d,%d,%d", pos.subx, pos.suby, pos.subz);
+ cudaPitchedPtr s;
+ s.ptr = (void*)src; // const cast away
+ s.pitch = pos.pitch * sizeof(float);
+ s.xsize = pos.nx * sizeof(float);
+ s.ysize = pos.ny;
+ ASTRA_DEBUG("Pitch %d, xsize %d, ysize %d", s.pitch, s.xsize, s.ysize);
+
+ cudaMemcpy3DParms p;
+ p.srcArray = 0;
+ p.srcPos = make_cudaPos(pos.subx * sizeof(float), pos.suby, pos.subz);
+ p.srcPtr = s;
+
+ p.dstArray = 0;
+ p.dstPos = make_cudaPos(0, 0, 0);
+ p.dstPtr = dst.d->ptr;
+
+ p.extent = make_cudaExtent(pos.subnx * sizeof(float), pos.subny, pos.subnz);
+
+ p.kind = cudaMemcpyHostToDevice;
+
+ cudaError_t err = cudaMemcpy3D(&p);
+
+ return err == cudaSuccess;
+}
+
+
+bool copyFromGPUMemory(float *dst, MemHandle3D src, const SSubDimensions3D &pos)
+{
+ ASTRA_DEBUG("Copying %d x %d x %d from GPU", pos.subnx, pos.subny, pos.subnz);
+ ASTRA_DEBUG("Offset %d,%d,%d", pos.subx, pos.suby, pos.subz);
+ cudaPitchedPtr d;
+ d.ptr = (void*)dst;
+ d.pitch = pos.pitch * sizeof(float);
+ d.xsize = pos.nx * sizeof(float);
+ d.ysize = pos.ny;
+ ASTRA_DEBUG("Pitch %d, xsize %d, ysize %d", d.pitch, d.xsize, d.ysize);
+
+ cudaMemcpy3DParms p;
+ p.srcArray = 0;
+ p.srcPos = make_cudaPos(0, 0, 0);
+ p.srcPtr = src.d->ptr;
+
+ p.dstArray = 0;
+ p.dstPos = make_cudaPos(pos.subx * sizeof(float), pos.suby, pos.subz);
+ p.dstPtr = d;
+
+ p.extent = make_cudaExtent(pos.subnx * sizeof(float), pos.subny, pos.subnz);
+
+ p.kind = cudaMemcpyDeviceToHost;
+
+ cudaError_t err = cudaMemcpy3D(&p);
+
+ return err == cudaSuccess;
+
+}
+
+
+bool FP(const astra::CProjectionGeometry3D* pProjGeom, MemHandle3D projData, const astra::CVolumeGeometry3D* pVolGeom, MemHandle3D volData, int iDetectorSuperSampling, astra::Cuda3DProjectionKernel projKernel)
+{
+ SDimensions3D dims;
+
+ bool ok = convertAstraGeometry_dims(pVolGeom, pProjGeom, dims);
+ if (!ok)
+ return false;
+
+#if 1
+ dims.iRaysPerDetDim = iDetectorSuperSampling;
+ if (iDetectorSuperSampling == 0)
+ return false;
+#else
+ dims.iRaysPerDetDim = 1;
+ astra::Cuda3DProjectionKernel projKernel = astra::ker3d_default;
+#endif
+
+
+ SPar3DProjection* pParProjs;
+ SConeProjection* pConeProjs;
+
+ float outputScale = 1.0f;
+
+ ok = convertAstraGeometry(pVolGeom, pProjGeom,
+ pParProjs, pConeProjs,
+ outputScale);
+
+ if (pParProjs) {
+#if 0
+ for (int i = 0; i < dims.iProjAngles; ++i) {
+ ASTRA_DEBUG("Vec: %6.3f %6.3f %6.3f %6.3f %6.3f %6.3f %6.3f %6.3f %6.3f %6.3f %6.3f %6.3f\n",
+ pParProjs[i].fRayX, pParProjs[i].fRayY, pParProjs[i].fRayZ,
+ pParProjs[i].fDetSX, pParProjs[i].fDetSY, pParProjs[i].fDetSZ,
+ pParProjs[i].fDetUX, pParProjs[i].fDetUY, pParProjs[i].fDetUZ,
+ pParProjs[i].fDetVX, pParProjs[i].fDetVY, pParProjs[i].fDetVZ);
+ }
+#endif
+
+ switch (projKernel) {
+ case astra::ker3d_default:
+ ok &= Par3DFP(volData.d->ptr, projData.d->ptr, dims, pParProjs, outputScale);
+ break;
+ case astra::ker3d_sum_square_weights:
+ ok &= Par3DFP_SumSqW(volData.d->ptr, projData.d->ptr, dims, pParProjs, outputScale*outputScale);
+ break;
+ default:
+ ok = false;
+ }
+ } else {
+ switch (projKernel) {
+ case astra::ker3d_default:
+ ok &= ConeFP(volData.d->ptr, projData.d->ptr, dims, pConeProjs, outputScale);
+ break;
+ default:
+ ok = false;
+ }
+ }
+
+ return ok;
+}
+
+bool BP(const astra::CProjectionGeometry3D* pProjGeom, MemHandle3D projData, const astra::CVolumeGeometry3D* pVolGeom, MemHandle3D volData, int iVoxelSuperSampling)
+{
+ SDimensions3D dims;
+
+ bool ok = convertAstraGeometry_dims(pVolGeom, pProjGeom, dims);
+ if (!ok)
+ return false;
+
+#if 1
+ dims.iRaysPerVoxelDim = iVoxelSuperSampling;
+#else
+ dims.iRaysPerVoxelDim = 1;
+#endif
+
+ SPar3DProjection* pParProjs;
+ SConeProjection* pConeProjs;
+
+ float outputScale = 1.0f;
+
+ ok = convertAstraGeometry(pVolGeom, pProjGeom,
+ pParProjs, pConeProjs,
+ outputScale);
+
+ if (pParProjs)
+ ok &= Par3DBP(volData.d->ptr, projData.d->ptr, dims, pParProjs, outputScale);
+ else
+ ok &= ConeBP(volData.d->ptr, projData.d->ptr, dims, pConeProjs, outputScale);
+
+ return ok;
+
+}
+
+
+
+
+}
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