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 */ 18kernel void transpose(__write_only image2d_t dst, 19 __read_only image2d_t src, 20 int dir) { 21 const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE | 22 CLK_ADDRESS_CLAMP_TO_EDGE | 23 CLK_FILTER_NEAREST); 24 25 int2 size = get_image_dim(dst); 26 int x = get_global_id(0); 27 int y = get_global_id(1); 28 29 int xin = (dir & 2) ? (size.y - 1 - y) : y; 30 int yin = (dir & 1) ? (size.x - 1 - x) : x; 31 float4 data = read_imagef(src, sampler, (int2)(xin, yin)); 32 33 if (x < size.x && y < size.y) 34 write_imagef(dst, (int2)(x, y), data); 35} 36