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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
/**
* Test program for itkGPUImage class.
* This program shows how to use GPU image and GPU program.
*/
//#include "pathToOpenCLSourceCode.h"
#include "itkGPUImage.h"
#include "itkGPUReduction.h"
int
itkGPUReductionTest(int argc, char * argv[])
{
if (argc > 2)
{
std::cout << "received " << argc << " arguments, but didn't expect any more than 1."
<< "first ignored argument: " << argv[2] << std::endl;
}
int numPixels = 256;
if (argc > 1)
{
numPixels = std::stoi(argv[1]);
}
// create input
using ElementType = int;
itk::GPUReduction<ElementType>::Pointer summer = itk::GPUReduction<ElementType>::New();
summer->InitializeKernel(numPixels);
unsigned int bytes = numPixels * sizeof(ElementType);
auto * h_idata = (ElementType *)malloc(bytes);
for (int ii = 0; ii < numPixels; ++ii)
{
h_idata[ii] = 1;
}
summer->AllocateGPUInputBuffer(h_idata);
summer->GPUGenerateData();
int GPUsum = summer->GetGPUResult();
summer->ReleaseGPUInputBuffer();
int status = EXIT_FAILURE;
if (GPUsum == static_cast<int>(numPixels))
{
std::cout << "GPU reduction to sum passed, sum = " << GPUsum << ", numPixels = " << numPixels << std::endl;
status = EXIT_SUCCESS;
}
else
{
std::cout << "Expected sum to be " << numPixels << ", GPUReduction computed " << GPUsum << " which is wrong."
<< std::endl;
status = EXIT_FAILURE;
}
int CPUsum = summer->CPUGenerateData(h_idata, numPixels);
if (CPUsum == static_cast<int>(numPixels))
{
std::cout << "CPU reduction to sum passed, sum = " << CPUsum << ", numPixels = " << numPixels << std::endl;
}
else
{
std::cout << "Expected CPU sum to be " << numPixels << ", GPUReduction computed " << CPUsum << " which is wrong."
<< std::endl;
status = EXIT_FAILURE;
}
summer = nullptr; // explicit GPU object destruction test
itk::GPUContextManager::GetInstance()->DestroyInstance(); // GPUContextManager singleton destruction test
return status;
}
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