.. SPDX-FileCopyrightText: 2021 Intel Corporation
..
.. SPDX-License-Identifier: CC-BY-4.0

.. _example:

Examples
========

The code example below demonstrates the oneDTL ZFP encode and decode functions usage.

.. code-block:: cpp


    // Array dimensions
    constexpr std::size_t  sx = 128;
    constexpr std::size_t  sy = 128;
    constexpr std::size_t  sz = 128;
    const sycl::range<3>   dimension( sz, sy, sx );

    // Input/Output sycl buffers
    sycl::buffer<float, 3> bufferIn( dimension );
    sycl::buffer<float, 3> bufferOut( dimension );

    // Input zfp_field for ZFP encode function
    data_compression::zfp_field<float, 3> source( bufferIn, dimension );
    // Output zfp_field for ZFP decode function
    data_compression::zfp_field<float, 3> destination( bufferOut, dimension );

    // ZFP compression mode
    data_compression::zfp_fixed_rate<float, 3> mode( 7.7 );
    // Count of blocks for each chunk
    std::size_t chunk_size = 1;
    // Output for encode and input for decode zfp_compressed_stream
    data_compression::zfp_compressed_stream<float, 3> stream( dimension,
                                                                mode,
                                                                data_compression::zfp_index_type::offset,
                                                                chunk_size );

    // sycl queue
    sycl::queue queue{};

    // ZFP compression
    data_compression::encode(queue, source, stream);
    // ZFP decompression
    data_compression::decode(queue, stream, destination);