mirror of
https://github.com/elementary/gala.git
synced 2024-12-21 08:11:35 +03:00
20 lines
612 B
GLSL
20 lines
612 B
GLSL
|
/*
|
||
|
|
* Copyright 2023 elementary, Inc. <https://elementary.io>
|
||
|
|
* SPDX-License-Identifier: GPL-3.0-or-later
|
||
|
|
*/
|
||
|
|
|
||
|
|
uniform sampler2D tex;
|
||
|
|
uniform float STRENGTH;
|
||
|
|
void main() {
|
||
|
|
vec2 uv = cogl_tex_coord0_in.xy;
|
||
|
|
vec4 sample = texture2D (tex, uv);
|
||
|
|
vec3 luminance = vec3 (0.2126, 0.7512, 0.0722);
|
||
|
|
float gray = luminance.r * sample.r + luminance.g * sample.g + luminance.b * sample.b;
|
||
|
|
cogl_color_out = vec4 (
|
||
|
|
sample.r * (1.0 - STRENGTH) + gray * STRENGTH,
|
||
|
|
sample.g * (1.0 - STRENGTH) + gray * STRENGTH,
|
||
|
|
sample.b * (1.0 - STRENGTH) + gray * STRENGTH,
|
||
|
|
sample.a
|
||
|
|
) ;
|
||
|
|
}
|