/usr/share/kde4/apps/kwin/invert.frag is in kde-window-manager-common 4:4.8.5-0ubuntu0.4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | uniform sampler2D sampler;
uniform vec4 modulation;
uniform float saturation;
uniform int u_forceAlpha;
varying vec2 varyingTexCoords;
void main()
{
vec4 tex = texture2D(sampler, varyingTexCoords);
if (u_forceAlpha > 0) {
tex.a = 1.0;
}
if (saturation != 1.0) {
vec3 desaturated = tex.rgb * vec3( 0.30, 0.59, 0.11 );
desaturated = vec3( dot( desaturated, tex.rgb ));
tex.rgb = tex.rgb * vec3( saturation ) + desaturated * vec3( 1.0 - saturation );
}
tex *= modulation;
tex.rgb = vec3(1.0) - tex.rgb;
tex.rgb *= tex.a;
gl_FragColor = tex;
}
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