| /* |
| * Copyright (c) 2018 Danil Iashchenko |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| |
| __kernel void erosion_global(__write_only image2d_t dst, |
| __read_only image2d_t src, |
| float threshold, |
| __constant int *coord) |
| { |
| const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE | |
| CLK_ADDRESS_CLAMP_TO_EDGE | |
| CLK_FILTER_NEAREST); |
| |
| int2 loc = (int2)(get_global_id(0), get_global_id(1)); |
| |
| float4 px = read_imagef(src, sampler, loc); |
| float limit = px.x - threshold; |
| if (limit < 0) { |
| limit = 0; |
| } |
| |
| for (int i = -1; i <= 1; i++) { |
| for (int j = -1; j <= 1; j++) { |
| if (coord[(j + 1) * 3 + (i + 1)] == 1) { |
| float4 cur = read_imagef(src, sampler, loc + (int2)(i, j)); |
| if (cur.x < px.x) { |
| px = cur; |
| } |
| } |
| } |
| } |
| if (limit > px.x) { |
| px = (float4)(limit); |
| } |
| write_imagef(dst, loc, px); |
| } |
| |
| |
| __kernel void dilation_global(__write_only image2d_t dst, |
| __read_only image2d_t src, |
| float threshold, |
| __constant int *coord) |
| { |
| const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE | |
| CLK_ADDRESS_CLAMP_TO_EDGE | |
| CLK_FILTER_NEAREST); |
| |
| int2 loc = (int2)(get_global_id(0), get_global_id(1)); |
| |
| float4 px = read_imagef(src, sampler, loc); |
| float limit = px.x + threshold; |
| if (limit > 1) { |
| limit = 1; |
| } |
| |
| for (int i = -1; i <= 1; i++) { |
| for (int j = -1; j <= 1; j++) { |
| if (coord[(j + 1) * 3 + (i + 1)] == 1) { |
| float4 cur = read_imagef(src, sampler, loc + (int2)(i, j)); |
| if (cur.x > px.x) { |
| px = cur; |
| } |
| } |
| } |
| } |
| if (limit < px.x) { |
| px = (float4)(limit); |
| } |
| write_imagef(dst, loc, px); |
| } |