27 lines
515 B
Nix
27 lines
515 B
Nix
{
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stdenv,
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imagemagick,
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gawk,
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src,
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}:
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stdenv.mkDerivation {
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pname = "invert-image-avg";
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version = "1.0";
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inherit src;
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buildInputs = [
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imagemagick
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gawk
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];
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# input is a file, not a directory, skip unpackPhase
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unpackPhase = "true";
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# command taken from: https://old.reddit.com/r/swaywm/comments/oz3t7v/setting_a_blurred_background_with_swaylock_and/
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buildPhase = ''
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rm -fr $out
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magick ${src} -channel RGB -negate -resize 1x1 txt: | awk 'FNR == 2 {print $3}' > $out
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'';
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}
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