1/* 2 * Copyright (c) 2016, 2017 Arm Limited. 3 * 4 * SPDX-License-Identifier: MIT 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to 8 * deal in the Software without restriction, including without limitation the 9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in all 14 * copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 */ 24#include "helpers.h" 25 26/** This function dilates an input image. 27 * 28 * @param[in] src_ptr Pointer to the source image. Supported data types: U8 29 * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) 30 * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) 31 * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) 32 * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) 33 * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image 34 * @param[out] dst_ptr Pointer to the destination image. Supported data types: U8 35 * @param[in] dst_stride_x Stride of the destination image in X dimension (in bytes) 36 * @param[in] dst_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) 37 * @param[in] dst_stride_y Stride of the destination image in Y dimension (in bytes) 38 * @param[in] dst_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) 39 * @param[in] dst_offset_first_element_in_bytes The offset of the first element in the destination image 40 */ 41__kernel void dilate( 42 IMAGE_DECLARATION(src), 43 IMAGE_DECLARATION(dst)) 44{ 45 Image src = CONVERT_TO_IMAGE_STRUCT(src); 46 Image dst = CONVERT_TO_IMAGE_STRUCT(dst); 47 48 uchar16 top = vload16(0, offset(&src, -1, -1)); 49 uchar16 middle = vload16(0, offset(&src, -1, 0)); 50 uchar16 bottom = vload16(0, offset(&src, -1, 1)); 51 52 uchar16 tmp = max(top, max(middle, bottom)); 53 uchar8 out = max(tmp.s01234567, max(tmp.s12345678, tmp.s23456789)); 54 55 vstore8(out, 0, dst.ptr); 56} 57