| Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1 | /* |
| Michele Di Giorgio | d9eaf61 | 2020-07-08 11:12:57 +0100 | [diff] [blame] | 2 | * Copyright (c) 2016, 2017 Arm Limited. |
| Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 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 erodes an input image 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 erode( |
| 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 = min(top, min(middle, bottom)); |
| 53 | uchar8 out = min(tmp.s01234567, min(tmp.s12345678, tmp.s23456789)); |
| 54 | |
| 55 | vstore8(out, 0, dst.ptr); |
| 56 | } |