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/*
* Copyright (c) 2025 Lynne <dev@lynne.ee>
*
* 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
*/
TYPE read_data(uint off)
{
#ifdef BIG_ENDIAN
return TYPE_REVERSE(data[off]);
#else
return data[off];
#endif
}
void main(void)
{
ivec2 pos = ivec2(gl_GlobalInvocationID.xy);
if (!IS_WITHIN(pos, imageSize(dst[0])))
return;
uint linesize;
linesize = align(imageSize(dst[0]).x*BITS_PER_COMP*COMPONENTS, 32);
linesize >>= BITS_LOG2;
uint offs = pos.y*linesize + pos.x*COMPONENTS;
#if NB_IMAGES == 1
TYPE_VEC val;
for (int i = 0; i < COMPONENTS; i++)
val[i] = read_data(offs + i);
val >>= SHIFT;
imageStore(dst[0], pos, val);
#else
const ivec4 fmt_lut = ivec4(2, 0, 1, 3);
for (int i = 0; i < COMPONENTS; i++) {
TYPE val = read_data(offs + i);
val >>= SHIFT;
imageStore(dst[fmt_lut[i]], pos, TYPE_VEC(val));
}
#endif
}
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