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https://github.com/NVIDIA/cuda-samples.git
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93 lines
3.6 KiB
C++
93 lines
3.6 KiB
C++
/* Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of NVIDIA CORPORATION nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// CUDA Runtime
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#include <cuda_runtime.h>
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// Helper functions
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#include <helper_cuda.h>
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#include <helper_math.h>
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#include "volume.h"
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void Volume_init(Volume *vol, cudaExtent dataSize, void *h_data,
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int allowStore) {
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// create 3D array
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vol->channelDesc = cudaCreateChannelDesc<VolumeType>();
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checkCudaErrors(
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cudaMalloc3DArray(&vol->content, &vol->channelDesc, dataSize,
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allowStore ? cudaArraySurfaceLoadStore : 0));
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vol->size = dataSize;
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if (h_data) {
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// copy data to 3D array
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cudaMemcpy3DParms copyParams = {0};
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copyParams.srcPtr =
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make_cudaPitchedPtr(h_data, dataSize.width * sizeof(VolumeType),
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dataSize.width, dataSize.height);
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copyParams.dstArray = vol->content;
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copyParams.extent = dataSize;
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copyParams.kind = cudaMemcpyHostToDevice;
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checkCudaErrors(cudaMemcpy3D(©Params));
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}
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if (allowStore) {
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cudaResourceDesc surfRes;
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memset(&surfRes, 0, sizeof(cudaResourceDesc));
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surfRes.resType = cudaResourceTypeArray;
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surfRes.res.array.array = vol->content;
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checkCudaErrors(cudaCreateSurfaceObject(&vol->volumeSurf, &surfRes));
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}
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cudaResourceDesc texRes;
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memset(&texRes, 0, sizeof(cudaResourceDesc));
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texRes.resType = cudaResourceTypeArray;
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texRes.res.array.array = vol->content;
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cudaTextureDesc texDescr;
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memset(&texDescr, 0, sizeof(cudaTextureDesc));
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texDescr.normalizedCoords = true;
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texDescr.filterMode = cudaFilterModeLinear;
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texDescr.addressMode[0] = cudaAddressModeWrap;
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texDescr.addressMode[1] = cudaAddressModeWrap;
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texDescr.addressMode[2] = cudaAddressModeWrap;
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texDescr.readMode =
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cudaReadModeNormalizedFloat; // VolumeTypeInfo<VolumeType>::readMode;
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checkCudaErrors(
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cudaCreateTextureObject(&vol->volumeTex, &texRes, &texDescr, NULL));
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}
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void Volume_deinit(Volume *vol) {
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checkCudaErrors(cudaDestroyTextureObject(vol->volumeTex));
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checkCudaErrors(cudaDestroySurfaceObject(vol->volumeSurf));
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checkCudaErrors(cudaFreeArray(vol->content));
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vol->content = 0;
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}
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