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/*
* 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 transpose(__write_only image2d_t dst,
__read_only image2d_t src,
int dir) {
const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
CLK_ADDRESS_CLAMP_TO_EDGE |
CLK_FILTER_NEAREST);
int2 size = get_image_dim(dst);
int x = get_global_id(0);
int y = get_global_id(1);
int xin = (dir & 2) ? (size.y - 1 - y) : y;
int yin = (dir & 1) ? (size.x - 1 - x) : x;
float4 data = read_imagef(src, sampler, (int2)(xin, yin));
if (x < size.x && y < size.y)
write_imagef(dst, (int2)(x, y), data);
}
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