glitchlock

README.md

I saw the awesome thing at r/unixporn and wanted to make it lock faster and run it with sway, so here it is.

nix run https://gist.github.com/yorickvP/70cecb02096379b2f7a3510fb726f2ff/archive/master.tar.gz -c glitchlock

default.nix

with import <nixpkgs> { };
let
  pypkg = python37.pkgs;
  pillow_simd = (pypkg.pillow.overridePythonAttrs (old: rec {
    pname = "Pillow-SIMD";
    version = "6.0.0.post0";

    src = pypkg.fetchPypi {
      inherit pname version;
      sha256 = "1jla56zidgh9dscl5ndi025rvzsbn4zz5aqas0rgw60plpzzdfsr";
    };
    postPatch = "";
    NIX_CFLAGS_COMPILE = "-mavx2 -msse4";
    doCheck = false;
  })).override { libjpeg = libjpeg_turbo; };
in stdenv.mkDerivation {
  name = "glitchlock";
  nativeBuildInputs = [ makeWrapper ];
  buildInputs = [ (python37.withPackages (o: [ pillow_simd ])) ];
  src = ./.;
  installPhase = ''
    mkdir -p $out/bin $out/libexec
    patchShebangs .
    cp glitchlock.sh $out/bin/glitchlock
    cp glitchlock.py $out/libexec
    chmod +x $out/bin/glitchlock
    chmod +x $out/libexec/glitchlock.py
    wrapProgram $out/bin/glitchlock --suffix PATH : ${
      lib.makeBinPath [ sox grim swaylock ]
    }:$out/libexec
  '';
}

glitchlock.py

#!/usr/bin/env python
# run with <(grim -t ppm -)
from PIL import Image
import subprocess, sys, os
from io import BytesIO
def pixelate(src, scale=10):
    dstsize = tuple(map(lambda x: x//scale, src.size))
    iS = src.resize(dstsize, resample=Image.BILINEAR)
    return iS.resize(src.size, resample=Image.NEAREST)

def glitch(src, dst):
    # Glitch it with sox FROM: https://maryknize.com/blog/glitch_art_with_sox_imagemagick_and_vim/
    # src cannot be dst
    subprocess.check_call(["sox", "-t", "ul", "-c", "1", "-r", "48k", src, "-t", "ul", dst, "trim", "0", "100s", ":", "echo", "0.9", "0.9", "15", "0.9"])

def lock(filename):
    os.execlp('swaylock', 'swaylock', '-i', filename)

screenshot = "/tmp/glitchlock.bmp"
screenshot2 = "/tmp/glitchlock_glitched.bmp"
    
pixelate(Image.open(sys.argv[1]), scale=7).save(screenshot)
glitch(screenshot, screenshot2)

Image.open(screenshot2).transpose(Image.ROTATE_90).save(screenshot)
glitch(screenshot, screenshot2)
Image.open(screenshot2).transpose(Image.ROTATE_270).save(screenshot)
os.remove(screenshot2)
lock(screenshot)

glitchlock.sh

#/bin/sh
glitchlock.py <(grim -t ppm -)

screenshot.png