2 * This file is part of FFmpeg.
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.
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.
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
18 kernel void transpose(__write_only image2d_t dst,
19 __read_only image2d_t src,
21 const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
22 CLK_ADDRESS_CLAMP_TO_EDGE |
25 int2 size = get_image_dim(dst);
26 int x = get_global_id(0);
27 int y = get_global_id(1);
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));
33 if (x < size.x && y < size.y)
34 write_imagef(dst, (int2)(x, y), data);