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/* Copyright (C) 2024 Aiden Gall
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
__kernel void
hello(__global unsigned char *const canvas)
{
size_t idx, w, h, i, j;
w = get_global_size(0);
h = get_global_size(1);
i = get_global_id(0);
j = get_global_id(1);
idx = (w * j + i) * 4;
canvas[idx] = (unsigned char)((255 * i) / (w - 1));
canvas[idx + 1] = (unsigned char)((255 * j) / (h - 1));
canvas[idx + 2] = 63;
canvas[idx + 3] = 255;
}
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