64 lines
1.6 KiB
Nix
Executable File
64 lines
1.6 KiB
Nix
Executable File
{ lib, ... }:
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rec
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{
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nohash = s: builtins.substring 1 7 s;
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slice-hex = hex: { r = builtins.substring 0 2 hex; g = builtins.substring 2 2 hex; b = builtins.substring 4 5 hex; };
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# https://github.com/bertof/nix-rice
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rune-to-num = c:
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let
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k = lib.strings.toUpper c;
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dict = {
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"0" = 0;
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"1" = 1;
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"2" = 2;
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"3" = 3;
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"4" = 4;
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"5" = 5;
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"6" = 6;
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"7" = 7;
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"8" = 8;
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"9" = 9;
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"A" = 10;
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"B" = 11;
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"C" = 12;
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"D" = 13;
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"E" = 14;
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"F" = 15;
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};
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in
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assert(builtins.hasAttr k dict);
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builtins.getAttr k dict;
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drune-to-255 = hex: (rune-to-num (builtins.substring 0 1 hex)) * 15 + (rune-to-num (builtins.substring 1 2 hex));
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hex-to-rgb-comma-string = hex: let color = (slice-hex (nohash hex)); in "${builtins.toString (drune-to-255 color.r)},${builtins.toString (drune-to-255 color.g)},${builtins.toString (drune-to-255 color.b)}";
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num-to-rune = n:
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let
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ns = builtins.toString n;
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dict = {
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"0" = "0";
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"1" = "1";
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"2" = "2";
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"3" = "3";
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"4" = "4";
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"5" = "5";
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"6" = "6";
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"7" = "7";
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"8" = "8";
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"9" = "9";
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"10" = "A";
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"11" = "B";
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"12" = "C";
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"13" = "D";
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"14" = "E";
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"15" = "F";
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};
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in
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assert(builtins.hasAttr ns dict);
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builtins.getAttr ns dict;
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float-to-drune = f: "${num-to-rune (builtins.floor((255*f) / 16))}${num-to-rune (builtins.floor(255*f) - (builtins.floor((255 * f) / 16) * 16))}";
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} |