src/core/CL/CLUtils.h

/*
 * Copyright (c) 2020 Arm Limited.
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef ARM_COMPUTE_CL_CLUTILS_H
#define ARM_COMPUTE_CL_CLUTILS_H

#include "arm_compute/core/CL/OpenCL.h"

namespace arm_compute
{
class TensorShape;

/** Create a cl::Image2D object from an OpenCL buffer
 *
 * @note The following conditions are required to create a OpenCL image object from OpenCL buffer,
 *       -# The platform should support the OpenCL cl_khr_image2d_from_buffer extension
 *       -# The stride Y for the input1 should satisfy the OpenCL pitch alignment requirement
 *       -# input width should be less or equal to (CL_DEVICE_IMAGE2D_MAX_WIDTH * 4)
 *       -# input height should be less or equal to CL_DEVICE_IMAGE2D_MAX_HEIGHT
 *
 * It is user responsibility to ensure the above conditions are satisfied since no checks are performed within this function
 *
 * @param[in] ctx             cl::Context object
 * @param[in] buffer          cl::Buffer object from which the OpenCL image2d object is created
 * @param[in] shape2d         2D tensor shape
 * @param[in] data_type       DataType to use. Only supported: F32,F16
 * @param[in] image_row_pitch Image row pitch (a.k.a. stride Y) to be used in the image2d object
 *
 * @return cl::Image2D object
 */
cl::Image2D create_image2d_from_buffer(const cl::Context &ctx, const cl::Buffer &buffer, const TensorShape &shape2d, DataType data_type, size_t image_row_pitch);

} // arm_compute

#endif /* ARM_COMPUTE_CL_CLUTILS_H */