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//---------------------------------------------------------------------------//
// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
//
// Distributed under the Boost Software License, Version 1.0
// See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt
//
// See http://boostorg.github.com/compute for more information.
//---------------------------------------------------------------------------//
//[transform_sqrt_example
#include <vector>
#include <algorithm>
#include <boost/compute/algorithm/transform.hpp>
#include <boost/compute/container/vector.hpp>
#include <boost/compute/functional/math.hpp>
namespace compute = boost::compute;
int main()
{
// get default device and setup context
compute::device device = compute::system::default_device();
compute::context context(device);
compute::command_queue queue(context, device);
// generate random data on the host
std::vector<float> host_vector(10000);
std::generate(host_vector.begin(), host_vector.end(), rand);
// create a vector on the device
compute::vector<float> device_vector(host_vector.size(), context);
// transfer data from the host to the device
compute::copy(
host_vector.begin(), host_vector.end(), device_vector.begin(), queue
);
// calculate the square-root of each element in-place
compute::transform(
device_vector.begin(),
device_vector.end(),
device_vector.begin(),
compute::sqrt<float>(),
queue
);
// copy values back to the host
compute::copy(
device_vector.begin(), device_vector.end(), host_vector.begin(), queue
);
return 0;
}
//]
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