22 lines
587 B
Plaintext
22 lines
587 B
Plaintext
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#!/usr/bin/env bash
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#
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# Grayscale using picom.
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# Based on https://wiki.archlinux.org/title/Picom#Grayscale
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killall picom
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picom --backend glx --glx-fshader-win "
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uniform float opacity;
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uniform bool invert_color;
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uniform sampler2D tex;
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void main() {
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vec4 c = texture2D(tex, gl_TexCoord[0].xy);
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float g = (c.r + c.g + c.b) / 3.0; // EDIT1: Average.
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c = vec4(vec3(g), c.a); // EDIT2: Color.
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if (invert_color)
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c = vec4(vec3(c.a, c.a, c.a) - vec3(c), c.a);
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c *= opacity;
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gl_FragColor = c;
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}
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"
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