diff options
Diffstat (limited to 'cuda/3d/cone_bp.cu')
| -rw-r--r-- | cuda/3d/cone_bp.cu | 83 |
1 files changed, 47 insertions, 36 deletions
diff --git a/cuda/3d/cone_bp.cu b/cuda/3d/cone_bp.cu index 1b0154d..3b0fd70 100644 --- a/cuda/3d/cone_bp.cu +++ b/cuda/3d/cone_bp.cu @@ -87,13 +87,13 @@ bool bindProjDataTexture(const cudaArray* array) } -__global__ void dev_cone_BP(void* D_volData, unsigned int volPitch, int startAngle, const SDimensions3D dims) +__global__ void dev_cone_BP(void* D_volData, unsigned int volPitch, int startAngle, int angleOffset, const SDimensions3D dims) { float* volData = (float*)D_volData; int endAngle = startAngle + g_anglesPerBlock; - if (endAngle > dims.iProjAngles) - endAngle = dims.iProjAngles; + if (endAngle > dims.iProjAngles - angleOffset) + endAngle = dims.iProjAngles - angleOffset; // threadIdx: x = rel x // y = rel y @@ -126,7 +126,7 @@ __global__ void dev_cone_BP(void* D_volData, unsigned int volPitch, int startAng { float fVal = 0.0f; - float fAngle = startAngle + 0.5f; + float fAngle = startAngle + angleOffset + 0.5f; for (int angle = startAngle; angle < endAngle; ++angle, fAngle += 1.0f) { @@ -161,13 +161,13 @@ __global__ void dev_cone_BP(void* D_volData, unsigned int volPitch, int startAng } // supersampling version -__global__ void dev_cone_BP_SS(void* D_volData, unsigned int volPitch, int startAngle, const SDimensions3D dims) +__global__ void dev_cone_BP_SS(void* D_volData, unsigned int volPitch, int startAngle, int angleOffset, const SDimensions3D dims) { float* volData = (float*)D_volData; int endAngle = startAngle + g_anglesPerBlock; - if (endAngle > dims.iProjAngles) - endAngle = dims.iProjAngles; + if (endAngle > dims.iProjAngles - angleOffset) + endAngle = dims.iProjAngles - angleOffset; // threadIdx: x = rel x // y = rel y @@ -201,7 +201,7 @@ __global__ void dev_cone_BP_SS(void* D_volData, unsigned int volPitch, int start { float fVal = 0.0f; - float fAngle = startAngle + 0.5f; + float fAngle = startAngle + angleOffset + 0.5f; for (int angle = startAngle; angle < endAngle; ++angle, fAngle += 1.0f) { @@ -256,49 +256,60 @@ bool ConeBP_Array(cudaPitchedPtr D_volumeData, { bindProjDataTexture(D_projArray); + for (unsigned int th = 0; th < dims.iProjAngles; th += g_MaxAngles) { + unsigned int angleCount = g_MaxAngles; + if (th + angleCount > dims.iProjAngles) + angleCount = dims.iProjAngles - th; - // transfer angles to constant memory - float* tmp = new float[dims.iProjAngles]; + // transfer angles to constant memory + float* tmp = new float[angleCount]; -#define TRANSFER_TO_CONSTANT(expr,name) do { for (unsigned int i = 0; i < dims.iProjAngles; ++i) tmp[i] = (expr) ; cudaMemcpyToSymbol(gC_##name, tmp, dims.iProjAngles*sizeof(float), 0, cudaMemcpyHostToDevice); } while (0) - TRANSFER_TO_CONSTANT( (angles[i].fDetSZ - angles[i].fSrcZ)*angles[i].fDetVY - (angles[i].fDetSY - angles[i].fSrcY)*angles[i].fDetVZ , Cux ); - TRANSFER_TO_CONSTANT( (angles[i].fDetSX - angles[i].fSrcX)*angles[i].fDetVZ -(angles[i].fDetSZ - angles[i].fSrcZ)*angles[i].fDetVX , Cuy ); - TRANSFER_TO_CONSTANT( (angles[i].fDetSY - angles[i].fSrcY)*angles[i].fDetVX - (angles[i].fDetSX - angles[i].fSrcX)*angles[i].fDetVY , Cuz ); - TRANSFER_TO_CONSTANT( (angles[i].fDetSY*angles[i].fDetVZ - angles[i].fDetSZ*angles[i].fDetVY)*angles[i].fSrcX - (angles[i].fDetSX*angles[i].fDetVZ - angles[i].fDetSZ*angles[i].fDetVX)*angles[i].fSrcY + (angles[i].fDetSX*angles[i].fDetVY - angles[i].fDetSY*angles[i].fDetVX)*angles[i].fSrcZ , Cuc ); + // NB: We increment angles at the end of the loop body. - TRANSFER_TO_CONSTANT( (angles[i].fDetSY - angles[i].fSrcY)*angles[i].fDetUZ-(angles[i].fDetSZ - angles[i].fSrcZ)*angles[i].fDetUY, Cvx ); - TRANSFER_TO_CONSTANT( (angles[i].fDetSZ - angles[i].fSrcZ)*angles[i].fDetUX - (angles[i].fDetSX - angles[i].fSrcX)*angles[i].fDetUZ , Cvy ); - TRANSFER_TO_CONSTANT((angles[i].fDetSX - angles[i].fSrcX)*angles[i].fDetUY-(angles[i].fDetSY - angles[i].fSrcY)*angles[i].fDetUX , Cvz ); - TRANSFER_TO_CONSTANT( -(angles[i].fDetSY*angles[i].fDetUZ - angles[i].fDetSZ*angles[i].fDetUY)*angles[i].fSrcX + (angles[i].fDetSX*angles[i].fDetUZ - angles[i].fDetSZ*angles[i].fDetUX)*angles[i].fSrcY - (angles[i].fDetSX*angles[i].fDetUY - angles[i].fDetSY*angles[i].fDetUX)*angles[i].fSrcZ , Cvc ); +#define TRANSFER_TO_CONSTANT(expr,name) do { for (unsigned int i = 0; i < angleCount; ++i) tmp[i] = (expr) ; cudaMemcpyToSymbol(gC_##name, tmp, angleCount*sizeof(float), 0, cudaMemcpyHostToDevice); } while (0) - TRANSFER_TO_CONSTANT( angles[i].fDetUY*angles[i].fDetVZ - angles[i].fDetUZ*angles[i].fDetVY , Cdx ); - TRANSFER_TO_CONSTANT( angles[i].fDetUZ*angles[i].fDetVX - angles[i].fDetUX*angles[i].fDetVZ , Cdy ); - TRANSFER_TO_CONSTANT( angles[i].fDetUX*angles[i].fDetVY - angles[i].fDetUY*angles[i].fDetVX , Cdz ); - TRANSFER_TO_CONSTANT( -angles[i].fSrcX * (angles[i].fDetUY*angles[i].fDetVZ - angles[i].fDetUZ*angles[i].fDetVY) - angles[i].fSrcY * (angles[i].fDetUZ*angles[i].fDetVX - angles[i].fDetUX*angles[i].fDetVZ) - angles[i].fSrcZ * (angles[i].fDetUX*angles[i].fDetVY - angles[i].fDetUY*angles[i].fDetVX) , Cdc ); + TRANSFER_TO_CONSTANT( (angles[i].fDetSZ - angles[i].fSrcZ)*angles[i].fDetVY - (angles[i].fDetSY - angles[i].fSrcY)*angles[i].fDetVZ , Cux ); + TRANSFER_TO_CONSTANT( (angles[i].fDetSX - angles[i].fSrcX)*angles[i].fDetVZ -(angles[i].fDetSZ - angles[i].fSrcZ)*angles[i].fDetVX , Cuy ); + TRANSFER_TO_CONSTANT( (angles[i].fDetSY - angles[i].fSrcY)*angles[i].fDetVX - (angles[i].fDetSX - angles[i].fSrcX)*angles[i].fDetVY , Cuz ); + TRANSFER_TO_CONSTANT( (angles[i].fDetSY*angles[i].fDetVZ - angles[i].fDetSZ*angles[i].fDetVY)*angles[i].fSrcX - (angles[i].fDetSX*angles[i].fDetVZ - angles[i].fDetSZ*angles[i].fDetVX)*angles[i].fSrcY + (angles[i].fDetSX*angles[i].fDetVY - angles[i].fDetSY*angles[i].fDetVX)*angles[i].fSrcZ , Cuc ); + + TRANSFER_TO_CONSTANT( (angles[i].fDetSY - angles[i].fSrcY)*angles[i].fDetUZ-(angles[i].fDetSZ - angles[i].fSrcZ)*angles[i].fDetUY, Cvx ); + TRANSFER_TO_CONSTANT( (angles[i].fDetSZ - angles[i].fSrcZ)*angles[i].fDetUX - (angles[i].fDetSX - angles[i].fSrcX)*angles[i].fDetUZ , Cvy ); + TRANSFER_TO_CONSTANT((angles[i].fDetSX - angles[i].fSrcX)*angles[i].fDetUY-(angles[i].fDetSY - angles[i].fSrcY)*angles[i].fDetUX , Cvz ); + TRANSFER_TO_CONSTANT( -(angles[i].fDetSY*angles[i].fDetUZ - angles[i].fDetSZ*angles[i].fDetUY)*angles[i].fSrcX + (angles[i].fDetSX*angles[i].fDetUZ - angles[i].fDetSZ*angles[i].fDetUX)*angles[i].fSrcY - (angles[i].fDetSX*angles[i].fDetUY - angles[i].fDetSY*angles[i].fDetUX)*angles[i].fSrcZ , Cvc ); + + TRANSFER_TO_CONSTANT( angles[i].fDetUY*angles[i].fDetVZ - angles[i].fDetUZ*angles[i].fDetVY , Cdx ); + TRANSFER_TO_CONSTANT( angles[i].fDetUZ*angles[i].fDetVX - angles[i].fDetUX*angles[i].fDetVZ , Cdy ); + TRANSFER_TO_CONSTANT( angles[i].fDetUX*angles[i].fDetVY - angles[i].fDetUY*angles[i].fDetVX , Cdz ); + TRANSFER_TO_CONSTANT( -angles[i].fSrcX * (angles[i].fDetUY*angles[i].fDetVZ - angles[i].fDetUZ*angles[i].fDetVY) - angles[i].fSrcY * (angles[i].fDetUZ*angles[i].fDetVX - angles[i].fDetUX*angles[i].fDetVZ) - angles[i].fSrcZ * (angles[i].fDetUX*angles[i].fDetVY - angles[i].fDetUY*angles[i].fDetVX) , Cdc ); #undef TRANSFER_TO_CONSTANT - delete[] tmp; + delete[] tmp; - dim3 dimBlock(g_volBlockX, g_volBlockY); + dim3 dimBlock(g_volBlockX, g_volBlockY); - dim3 dimGrid(((dims.iVolX+g_volBlockX-1)/g_volBlockX)*((dims.iVolY+g_volBlockY-1)/g_volBlockY), (dims.iVolZ+g_volBlockZ-1)/g_volBlockZ); + dim3 dimGrid(((dims.iVolX+g_volBlockX-1)/g_volBlockX)*((dims.iVolY+g_volBlockY-1)/g_volBlockY), (dims.iVolZ+g_volBlockZ-1)/g_volBlockZ); - // timeval t; - // tic(t); + // timeval t; + // tic(t); - for (unsigned int i = 0; i < dims.iProjAngles; i += g_anglesPerBlock) { + for (unsigned int i = 0; i < angleCount; i += g_anglesPerBlock) { // printf("Calling BP: %d, %dx%d, %dx%d to %p\n", i, dimBlock.x, dimBlock.y, dimGrid.x, dimGrid.y, (void*)D_volumeData.ptr); - if (dims.iRaysPerVoxelDim == 1) - dev_cone_BP<<<dimGrid, dimBlock>>>(D_volumeData.ptr, D_volumeData.pitch/sizeof(float), i, dims); - else - dev_cone_BP_SS<<<dimGrid, dimBlock>>>(D_volumeData.ptr, D_volumeData.pitch/sizeof(float), i, dims); - } + if (dims.iRaysPerVoxelDim == 1) + dev_cone_BP<<<dimGrid, dimBlock>>>(D_volumeData.ptr, D_volumeData.pitch/sizeof(float), i, th, dims); + else + dev_cone_BP_SS<<<dimGrid, dimBlock>>>(D_volumeData.ptr, D_volumeData.pitch/sizeof(float), i, th, dims); + } - cudaTextForceKernelsCompletion(); + cudaTextForceKernelsCompletion(); + + angles = angles + angleCount; + // printf("%f\n", toc(t)); + + } - // printf("%f\n", toc(t)); return true; } |