feat: add lut node script, renders, and examples

lut/apply.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+
+set -e
+# ensure src is where the script is located, even if symlinked
+src="$( cd -- "$( dirname -- "$(readlink -f "${BASH_SOURCE[0]}" || ${BASH_SOURCE[0]})" )" &> /dev/null && pwd )/src"
+
+print_usage() {
+  name=`basename $0`
+  cat <<EOF
+Usage: $name -i <image1> ... [args]
+    -i image  :  Image to apply LUT to, can be repeated
+    -f flavor :  Flavor to apply, can be repeated. Defaults to all
+    -n noise  :  LUT Noise level (0-4). Defaults to 2
+EOF
+}
+
+noise="2"
+images=""
+flavors=""
+
+while getopts ':f:i:n:' flag; do
+  case "$flag" in
+    n)
+      if [[ $OPTARG -gt 4 ]]; then
+        echo "Invalid noise level (0-4)"
+        exit 1
+      else
+        noise=$OPTARG
+      fi
+      ;;
+    f) flavors="$flavors $OPTARG" ;;
+    i) images="$images `realpath $OPTARG`" ;;
+    *) print_usage
+       exit 1 ;;
+  esac
+done
+
+if [[ "$images" == "" ]]; then
+  print_usage
+fi
+
+if [[ "$flavors" == "" ]]; then
+  flavors="Oled Mocha Macchiato Frappe Latte"
+fi
+
+for file in $images; do
+  echo "Performing magick on `basename $file` (noise: $noise)"
+  for flavor in $flavors; do
+    printf "$flavor ..."
+    out="${file%%.*}-${flavor}.png"
+    magick $file "$src/noise_$noise/Catppuccin ${flavor}.png" -hald-clut "$out"
+    printf "\r$flavor ✓ ($out)\n"
+  done
+done
+

src/scripts/build_luts.mjs

@@ -0,0 +1,42 @@
+import { exec } from "child_process";
+import url from "url";
+import path from "path";
+import fs from "fs";
+import util from "util";
+import { variants } from "@catppuccin/palette";
+
+const root = path.resolve(
+  url.fileURLToPath(new URL(".", import.meta.url)),
+  "..",
+  "..",
+  "dist"
+);
+
+const generateLut = async (name, out) => {
+  for (let i = 0; i <= 4; i++) {
+    fs.mkdirSync(path.join(root, `lut/noise_${i}`), { recursive: true });
+    process.stdout.clearLine(0);
+    process.stdout.cursorTo(0);
+    process.stdout.write(`${name}: [${i + 1}/5]`);
+
+    const cmd = `convert HALD:8 -duplicate 512 -attenuate ${i} +noise Gaussian -quantize LAB +dither -remap "${root}/png/${name}.png" -evaluate-sequence Mean "${root}/../lut/noise_${i}/${name}.png"`;
+
+    await util.promisify(exec)(cmd);
+  }
+
+  process.stdout.clearLine(0);
+  process.stdout.cursorTo(0);
+  console.log(`${name}: done`);
+};
+
+
+console.log("Generating Hald CLUTs...")
+const flavors = Object.keys(variants);
+for (let i = 0; i < flavors.length; i++) {
+  const name = flavors[i];
+  // formatted "pretty" name, Catppuccin <Flavor>
+  const pname = `Catppuccin ${name.charAt(0).toUpperCase() + name.slice(1)}`;
+
+  await generateLut(pname);
+}
+