/usr/share/movit/mirror_effect.frag is in libmovit8 1.6.1-1.
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 | // Mirrors the image horizontally.
vec4 FUNCNAME(vec2 tc)
{
tc.x = 1.0 - tc.x;
return INPUT(tc);
}
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