1/* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19const sampler_t sampler = CLK_NORMALIZED_COORDS_FALSE | 20 CLK_FILTER_NEAREST; 21 22__kernel void pad ( 23 __read_only image2d_t src, 24 __write_only image2d_t dst, 25 float4 color, 26 int2 xy) 27{ 28 int2 size_src = get_image_dim(src); 29 int2 loc = (int2)(get_global_id(0), get_global_id(1)); 30 int2 src_pos = (int2)(get_global_id(0) - xy.x, get_global_id(1) - xy.y); 31 float4 pixel = loc.x >= size_src.x + xy.x || 32 loc.y >= size_src.y + xy.y || 33 loc.x < xy.x || 34 loc.y < xy.y ? color : read_imagef(src, sampler, src_pos); 35 write_imagef(dst, loc, pixel); 36} 37