cuda-samples/Samples/5_Domain_Specific/simpleD3D11/sinewave_cuda.cu

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2022-01-13 14:05:24 +08:00
/* Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of NVIDIA CORPORATION nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include "ShaderStructs.h"
#include "helper_cuda.h"
#include "sinewave_cuda.h"
__global__ void sinewave_gen_kernel(Vertex *vertices, unsigned int width, unsigned int height, float time)
{
unsigned int x = blockIdx.x*blockDim.x + threadIdx.x;
unsigned int y = blockIdx.y*blockDim.y + threadIdx.y;
// calculate uv coordinates
float u = x / (float) width;
float v = y / (float) height;
u = u*2.0f - 1.0f;
v = v*2.0f - 1.0f;
// calculate simple sine wave pattern
float freq = 4.0f;
float w = sinf(u*freq + time) * cosf(v*freq + time) * 0.5f;
if (y < height && x < width)
{
// write output vertex
vertices[y*width+x].position.x = u;
vertices[y*width+x].position.y = w;
vertices[y*width+x].position.z = v;
vertices[y*width+x].color.x = 1.0f;
vertices[y*width+x].color.y = 0.0f;
vertices[y*width+x].color.z = 0.0f;
vertices[y*width + x].color.w = 0.0f;
}
}
Vertex* cudaImportVertexBuffer(void*sharedHandle, cudaExternalMemory_t &externalMemory, int meshWidth, int meshHeight)
{
cudaExternalMemoryHandleDesc externalMemoryHandleDesc;
memset(&externalMemoryHandleDesc, 0, sizeof(externalMemoryHandleDesc));
externalMemoryHandleDesc.type = cudaExternalMemoryHandleTypeD3D11ResourceKmt;
externalMemoryHandleDesc.size = sizeof(Vertex) * meshHeight * meshWidth;
externalMemoryHandleDesc.flags = cudaExternalMemoryDedicated;
externalMemoryHandleDesc.handle.win32.handle = sharedHandle;
checkCudaErrors(cudaImportExternalMemory(&externalMemory, &externalMemoryHandleDesc));
cudaExternalMemoryBufferDesc externalMemoryBufferDesc;
memset(&externalMemoryBufferDesc, 0, sizeof(externalMemoryBufferDesc));
externalMemoryBufferDesc.offset = 0;
externalMemoryBufferDesc.size = sizeof(Vertex) * meshHeight * meshWidth;
externalMemoryBufferDesc.flags = 0;
Vertex* cudaDevVertptr = NULL;
checkCudaErrors(cudaExternalMemoryGetMappedBuffer((void**)&cudaDevVertptr, externalMemory, &externalMemoryBufferDesc));
return cudaDevVertptr;
}
void cudaImportKeyedMutex(void*sharedHandle, cudaExternalSemaphore_t &extSemaphore)
{
cudaExternalSemaphoreHandleDesc extSemaDesc;
memset(&extSemaDesc, 0, sizeof(extSemaDesc));
extSemaDesc.type = cudaExternalSemaphoreHandleTypeKeyedMutexKmt;
extSemaDesc.handle.win32.handle = sharedHandle;
extSemaDesc.flags = 0;
checkCudaErrors(cudaImportExternalSemaphore(&extSemaphore, &extSemaDesc));
}
void cudaAcquireSync(cudaExternalSemaphore_t &extSemaphore, uint64_t key, unsigned int timeoutMs, cudaStream_t streamToRun)
{
cudaExternalSemaphoreWaitParams extSemWaitParams;
memset(&extSemWaitParams, 0, sizeof(extSemWaitParams));
extSemWaitParams.params.keyedMutex.key = key;
extSemWaitParams.params.keyedMutex.timeoutMs = timeoutMs;
checkCudaErrors(cudaWaitExternalSemaphoresAsync(&extSemaphore, &extSemWaitParams, 1, streamToRun));
}
void cudaReleaseSync(cudaExternalSemaphore_t &extSemaphore, uint64_t key, cudaStream_t streamToRun)
{
cudaExternalSemaphoreSignalParams extSemSigParams;
memset(&extSemSigParams, 0, sizeof(extSemSigParams));
extSemSigParams.params.keyedMutex.key = key;
checkCudaErrors(cudaSignalExternalSemaphoresAsync(&extSemaphore, &extSemSigParams, 1, streamToRun));
}
////////////////////////////////////////////////////////////////////////////////
//! Run the Cuda part of the computation
////////////////////////////////////////////////////////////////////////////////
void RunSineWaveKernel(cudaExternalSemaphore_t &extSemaphore, uint64_t &key, unsigned int timeoutMs,
size_t mesh_width, size_t mesh_height, Vertex *cudaDevVertptr, cudaStream_t streamToRun)
{
static float t = 0.0f;
cudaAcquireSync(extSemaphore, key++, timeoutMs, streamToRun);
dim3 block(16, 16, 1);
dim3 grid(mesh_width / 16, mesh_height / 16, 1);
sinewave_gen_kernel<<< grid, block, 0, streamToRun >>>(cudaDevVertptr, mesh_width, mesh_height, t);
getLastCudaError("sinewave_gen_kernel execution failed.\n");
cudaReleaseSync(extSemaphore, key, streamToRun);
t += 0.01f;
}