/* 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 ushort *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] = (ushort)((65535 * i) / (w - 1));
	canvas[idx + 1] = (ushort)((65535 * j) / (h - 1));
	canvas[idx + 2] = 16383;
	canvas[idx + 3] = 65535;
}