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65 lines
2.9 KiB
Plaintext
65 lines
2.9 KiB
Plaintext
/* Copyright (c) 2024, 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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#include <cuda.h>
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#include <helper_cuda.h>
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static __global__ void flipSurfaceBits(cudaSurfaceObject_t surfObj, int width, int height) {
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char data;
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unsigned int x = blockIdx.x * blockDim.x + threadIdx.x;
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unsigned int y = blockIdx.y * blockDim.y + threadIdx.y;
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if (x < width && y < height) {
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// Read from input surface
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surf2Dread(&data, surfObj, x, y);
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// Write to output surface
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data = ~data;
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surf2Dwrite(data, surfObj, x, y);
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}
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}
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// Copy cudaArray to surface memory and launch the CUDA kernel
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void launchFlipSurfaceBitsKernel(
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cudaArray_t *levelArray,
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int32_t *multiPlanarWidth,
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int32_t *multiPlanarHeight,
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int numPlanes) {
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cudaSurfaceObject_t surfObject[numPlanes] = {0};
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cudaResourceDesc resDesc;
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for (int i = 0; i < numPlanes; i++) {
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memset(&resDesc, 0, sizeof(resDesc));
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resDesc.resType = cudaResourceTypeArray;
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resDesc.res.array.array = levelArray[i];
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checkCudaErrors(cudaCreateSurfaceObject(&surfObject[i], &resDesc));
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dim3 threadsperBlock(16, 16);
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dim3 numBlocks((multiPlanarWidth[i] + threadsperBlock.x - 1) / threadsperBlock.x,
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(multiPlanarHeight[i] + threadsperBlock.y - 1) / threadsperBlock.y);
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flipSurfaceBits<<<numBlocks, threadsperBlock>>>(surfObject[i], multiPlanarWidth[i], multiPlanarHeight[i]);
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}
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}
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