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/*
Hurry Curry! - a game about cooking
Copyright (C) 2025 Hurry Curry! Contributors
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, version 3 of the License only.
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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
shader_type canvas_item;
void fragment() {
float brightness = 0.2126 * COLOR.r + 0.7152 * COLOR.g + 0.0722 * COLOR.b;
brightness = (brightness - .5) * 2.;
COLOR.rgb = vec3(brightness);
COLOR.a *= 1. - brightness;
}
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