diff options
Diffstat (limited to 'cuda/2d/par_bp.cu')
| -rw-r--r-- | cuda/2d/par_bp.cu | 52 |
1 files changed, 23 insertions, 29 deletions
diff --git a/cuda/2d/par_bp.cu b/cuda/2d/par_bp.cu index d7c3ab0..4066912 100644 --- a/cuda/2d/par_bp.cu +++ b/cuda/2d/par_bp.cu @@ -51,24 +51,8 @@ __constant__ float gC_angle_scaled_cos[g_MaxAngles]; __constant__ float gC_angle_offset[g_MaxAngles]; __constant__ float gC_angle_scale[g_MaxAngles]; -static bool bindProjDataTexture(float* data, unsigned int pitch, unsigned int width, unsigned int height, cudaTextureAddressMode mode = cudaAddressModeBorder) -{ - cudaChannelFormatDesc channelDesc = cudaCreateChannelDesc<float>(); - - gT_projTexture.addressMode[0] = mode; - gT_projTexture.addressMode[1] = mode; - gT_projTexture.filterMode = cudaFilterModeLinear; - gT_projTexture.normalized = false; - - cudaBindTexture2D(0, gT_projTexture, (const void*)data, channelDesc, width, height, sizeof(float)*pitch); - - // TODO: error value? - - return true; -} - // TODO: Templated version with/without scale? (Or only the global outputscale) -__global__ void devBP(float* D_volData, unsigned int volPitch, unsigned int startAngle, const SDimensions dims, float fOutputScale) +__global__ void devBP(float* D_volData, unsigned int volPitch, cudaTextureObject_t tex, unsigned int startAngle, const SDimensions dims, float fOutputScale) { const int relX = threadIdx.x; const int relY = threadIdx.y; @@ -98,7 +82,7 @@ __global__ void devBP(float* D_volData, unsigned int volPitch, unsigned int star const float scale = gC_angle_scale[angle]; const float fT = fX * scaled_cos_theta - fY * scaled_sin_theta + TOffset; - fVal += tex2D(gT_projTexture, fT, fA) * scale; + fVal += tex2D<float>(tex, fT, fA) * scale; fA += 1.0f; } @@ -106,7 +90,7 @@ __global__ void devBP(float* D_volData, unsigned int volPitch, unsigned int star } // supersampling version -__global__ void devBP_SS(float* D_volData, unsigned int volPitch, unsigned int startAngle, const SDimensions dims, float fOutputScale) +__global__ void devBP_SS(float* D_volData, unsigned int volPitch, cudaTextureObject_t tex, unsigned int startAngle, const SDimensions dims, float fOutputScale) { const int relX = threadIdx.x; const int relY = threadIdx.y; @@ -145,7 +129,7 @@ __global__ void devBP_SS(float* D_volData, unsigned int volPitch, unsigned int s float fTy = fT; fT += fSubStep * cos_theta; for (int iSubY = 0; iSubY < dims.iRaysPerPixelDim; ++iSubY) { - fVal += tex2D(gT_projTexture, fTy, fA) * scale; + fVal += tex2D<float>(tex, fTy, fA) * scale; fTy -= fSubStep * sin_theta; } } @@ -155,7 +139,7 @@ __global__ void devBP_SS(float* D_volData, unsigned int volPitch, unsigned int s volData[Y*volPitch+X] += fVal * fOutputScale; } -__global__ void devBP_SART(float* D_volData, unsigned int volPitch, float offset, float angle_sin, float angle_cos, const SDimensions dims, float fOutputScale) +__global__ void devBP_SART(float* D_volData, unsigned int volPitch, cudaTextureObject_t tex, float offset, float angle_sin, float angle_cos, const SDimensions dims, float fOutputScale) { const int relX = threadIdx.x; const int relY = threadIdx.y; @@ -170,7 +154,7 @@ __global__ void devBP_SART(float* D_volData, unsigned int volPitch, float offset const float fY = ( Y - 0.5f*dims.iVolHeight + 0.5f ); const float fT = fX * angle_cos - fY * angle_sin + offset; - const float fVal = tex2D(gT_projTexture, fT, 0.5f); + const float fVal = tex2D<float>(tex, fT, 0.5f); // NB: The 'scale' constant in devBP is cancelled out by the SART weighting @@ -185,13 +169,15 @@ bool BP_internal(float* D_volumeData, unsigned int volumePitch, { assert(dims.iProjAngles <= g_MaxAngles); + cudaTextureObject_t D_texObj; + if (!createTextureObjectPitch2D(D_projData, D_texObj, projPitch, dims.iProjDets, dims.iProjAngles)) + return false; + float* angle_scaled_sin = new float[dims.iProjAngles]; float* angle_scaled_cos = new float[dims.iProjAngles]; float* angle_offset = new float[dims.iProjAngles]; float* angle_scale = new float[dims.iProjAngles]; - bindProjDataTexture(D_projData, projPitch, dims.iProjDets, dims.iProjAngles); - for (unsigned int i = 0; i < dims.iProjAngles; ++i) { double d = angles[i].fDetUX * angles[i].fRayY - angles[i].fDetUY * angles[i].fRayX; angle_scaled_cos[i] = angles[i].fRayY / d; @@ -227,15 +213,17 @@ bool BP_internal(float* D_volumeData, unsigned int volumePitch, for (unsigned int i = 0; i < dims.iProjAngles; i += g_anglesPerBlock) { if (dims.iRaysPerPixelDim > 1) - devBP_SS<<<dimGrid, dimBlock, 0, stream>>>(D_volumeData, volumePitch, i, dims, fOutputScale); + devBP_SS<<<dimGrid, dimBlock, 0, stream>>>(D_volumeData, volumePitch, D_texObj, i, dims, fOutputScale); else - devBP<<<dimGrid, dimBlock, 0, stream>>>(D_volumeData, volumePitch, i, dims, fOutputScale); + devBP<<<dimGrid, dimBlock, 0, stream>>>(D_volumeData, volumePitch, D_texObj, i, dims, fOutputScale); } bool ok = checkCuda(cudaStreamSynchronize(stream), "par_bp"); cudaStreamDestroy(stream); + cudaDestroyTextureObject(D_texObj); + return ok; } @@ -269,7 +257,9 @@ bool BP_SART(float* D_volumeData, unsigned int volumePitch, // Only one angle. // We need to Clamp to the border pixels instead of to zero, because // SART weights with ray length. - bindProjDataTexture(D_projData, projPitch, dims.iProjDets, 1, cudaAddressModeClamp); + cudaTextureObject_t D_texObj; + if (!createTextureObjectPitch2D(D_projData, D_texObj, projPitch, dims.iProjDets, 1, cudaAddressModeClamp)) + return false; double d = angles[angle].fDetUX * angles[angle].fRayY - angles[angle].fDetUY * angles[angle].fRayX; float angle_scaled_cos = angles[angle].fRayY / d; @@ -282,9 +272,13 @@ bool BP_SART(float* D_volumeData, unsigned int volumePitch, dim3 dimGrid((dims.iVolWidth+g_blockSlices-1)/g_blockSlices, (dims.iVolHeight+g_blockSliceSize-1)/g_blockSliceSize); - devBP_SART<<<dimGrid, dimBlock>>>(D_volumeData, volumePitch, angle_offset, angle_scaled_sin, angle_scaled_cos, dims, fOutputScale); + devBP_SART<<<dimGrid, dimBlock>>>(D_volumeData, volumePitch, D_texObj, angle_offset, angle_scaled_sin, angle_scaled_cos, dims, fOutputScale); - return checkCuda(cudaThreadSynchronize(), "BP_SART"); + bool ok = checkCuda(cudaThreadSynchronize(), "BP_SART"); + + cudaDestroyTextureObject(D_texObj); + + return ok; } |