diff options
Diffstat (limited to 'cuda/2d/par_fp.cu')
| -rw-r--r-- | cuda/2d/par_fp.cu | 56 |
1 files changed, 14 insertions, 42 deletions
diff --git a/cuda/2d/par_fp.cu b/cuda/2d/par_fp.cu index e947428..3d9e842 100644 --- a/cuda/2d/par_fp.cu +++ b/cuda/2d/par_fp.cu @@ -34,11 +34,6 @@ along with the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>. #include <list> #include <cmath> -typedef texture<float, 2, cudaReadModeElementType> texture2D; - -static texture2D gT_volumeTexture; - - namespace astraCUDA { static const unsigned g_MaxAngles = 2560; @@ -52,37 +47,9 @@ static const unsigned int g_anglesPerBlock = 16; static const unsigned int g_detBlockSize = 32; static const unsigned int g_blockSlices = 64; -// fixed point scaling factor -#define fPREC_FACTOR 16.0f -#define iPREC_FACTOR 16 - - -static bool bindVolumeDataTexture(float* data, cudaArray*& dataArray, unsigned int pitch, unsigned int width, unsigned int height) -{ - cudaChannelFormatDesc channelDesc = cudaCreateChannelDesc<float>(); - dataArray = 0; - cudaMallocArray(&dataArray, &channelDesc, width, height); - cudaMemcpy2DToArray(dataArray, 0, 0, data, pitch*sizeof(float), width*sizeof(float), height, cudaMemcpyDeviceToDevice); - - gT_volumeTexture.addressMode[0] = cudaAddressModeBorder; - gT_volumeTexture.addressMode[1] = cudaAddressModeBorder; - gT_volumeTexture.filterMode = cudaFilterModeLinear; - gT_volumeTexture.normalized = false; - - // TODO: For very small sizes (roughly <=512x128) with few angles (<=180) - // not using an array is more efficient. -// cudaBindTexture2D(0, gT_volumeTexture, (const void*)data, channelDesc, width, height, sizeof(float)*pitch); - cudaBindTextureToArray(gT_volumeTexture, dataArray, channelDesc); - - // TODO: error value? - - return true; -} - - // projection for angles that are roughly horizontal // (detector roughly vertical) -__global__ void FPhorizontal_simple(float* D_projData, unsigned int projPitch, unsigned int startSlice, unsigned int startAngle, unsigned int endAngle, const SDimensions dims, float outputScale) +__global__ void FPhorizontal_simple(float* D_projData, unsigned int projPitch, cudaTextureObject_t tex, unsigned int startSlice, unsigned int startAngle, unsigned int endAngle, const SDimensions dims, float outputScale) { const int relDet = threadIdx.x; const int relAngle = threadIdx.y; @@ -134,7 +101,7 @@ __global__ void FPhorizontal_simple(float* D_projData, unsigned int projPitch, u for (int slice = startSlice; slice < endSlice; ++slice) { for (int iSubT = 0; iSubT < dims.iRaysPerDet; ++iSubT) { - fVal += tex2D(gT_volumeTexture, fS, fP); + fVal += tex2D<float>(tex, fS, fP); fP += fSubDetStep; } fP += fSliceStep; @@ -145,7 +112,7 @@ __global__ void FPhorizontal_simple(float* D_projData, unsigned int projPitch, u for (int slice = startSlice; slice < endSlice; ++slice) { - fVal += tex2D(gT_volumeTexture, fS, fP); + fVal += tex2D<float>(tex, fS, fP); fP += fSliceStep; fS += 1.0f; } @@ -159,7 +126,7 @@ __global__ void FPhorizontal_simple(float* D_projData, unsigned int projPitch, u // projection for angles that are roughly vertical // (detector roughly horizontal) -__global__ void FPvertical_simple(float* D_projData, unsigned int projPitch, unsigned int startSlice, unsigned int startAngle, unsigned int endAngle, const SDimensions dims, float outputScale) +__global__ void FPvertical_simple(float* D_projData, unsigned int projPitch, cudaTextureObject_t tex, unsigned int startSlice, unsigned int startAngle, unsigned int endAngle, const SDimensions dims, float outputScale) { const int relDet = threadIdx.x; const int relAngle = threadIdx.y; @@ -210,7 +177,7 @@ __global__ void FPvertical_simple(float* D_projData, unsigned int projPitch, uns for (int slice = startSlice; slice < endSlice; ++slice) { for (int iSubT = 0; iSubT < dims.iRaysPerDet; ++iSubT) { - fVal += tex2D(gT_volumeTexture, fP, fS); + fVal += tex2D<float>(tex, fP, fS); fP += fSubDetStep; } fP += fSliceStep; @@ -221,7 +188,7 @@ __global__ void FPvertical_simple(float* D_projData, unsigned int projPitch, uns for (int slice = startSlice; slice < endSlice; ++slice) { - fVal += tex2D(gT_volumeTexture, fP, fS); + fVal += tex2D<float>(tex, fP, fS); fP += fSliceStep; fS += 1.0f; } @@ -269,7 +236,10 @@ bool FP_simple_internal(float* D_volumeData, unsigned int volumePitch, assert(angles); cudaArray* D_dataArray; - bindVolumeDataTexture(D_volumeData, D_dataArray, volumePitch, dims.iVolWidth, dims.iVolHeight); + cudaTextureObject_t D_texObj; + + if (!createArrayAndTextureObject2D(D_volumeData, D_dataArray, D_texObj, volumePitch, dims.iVolWidth, dims.iVolHeight)) + return false; convertAndUploadAngles(angles, dims.iProjAngles, dims.iProjDets); @@ -313,10 +283,10 @@ bool FP_simple_internal(float* D_volumeData, unsigned int volumePitch, //printf("angle block: %d to %d, %d\n", blockStart, blockEnd, blockVertical); if (!blockVertical) for (unsigned int i = 0; i < dims.iVolWidth; i += g_blockSlices) - FPhorizontal_simple<<<dimGrid, dimBlock, 0, stream>>>(D_projData, projPitch, i, blockStart, blockEnd, dims, outputScale); + FPhorizontal_simple<<<dimGrid, dimBlock, 0, stream>>>(D_projData, projPitch, D_texObj, i, blockStart, blockEnd, dims, outputScale); else for (unsigned int i = 0; i < dims.iVolHeight; i += g_blockSlices) - FPvertical_simple<<<dimGrid, dimBlock, 0, stream>>>(D_projData, projPitch, i, blockStart, blockEnd, dims, outputScale); + FPvertical_simple<<<dimGrid, dimBlock, 0, stream>>>(D_projData, projPitch, D_texObj, i, blockStart, blockEnd, dims, outputScale); } blockVertical = vertical; blockStart = a; @@ -332,6 +302,8 @@ bool FP_simple_internal(float* D_volumeData, unsigned int volumePitch, cudaFreeArray(D_dataArray); + cudaDestroyTextureObject(D_texObj); + return ok; } |