hypermoji

#!/usr/bin/env bash
set -euo pipefail

usage() {
  cat <<EOF
Usage: $(basename "$0") INPUT_IMAGE OUTPUT_IMAGE [MULTIPLY_FACTOR] [POW_FACTOR]

  INPUT_IMAGE       source file (e.g. emoji.png)
  OUTPUT_IMAGE      destination (e.g. emoji-hyper.png)
  MULTIPLY_FACTOR   brightness multiplier (default: 1.5)
  POW_FACTOR        gamma power curve (default: 0.9)

This script will:
  • convert to floating-point pixels
  • transform to sRGB
  • auto-gamma, multiply, then pow
  • set 16-bit depth
  • apply the embedded Rec2020→Rec1886 ICC profile
EOF
  exit 1
}

# require at least 2 args
if [[ $# -lt 2 ]]; then usage; fi

INPUT="$1"
OUTPUT="$2"
MULT="${3:-1.5}"
POW="${4:-0.9}"

# prepare a temporary ICC file
TMP_ICC="$(mktemp --suffix=.icc)"
cleanup() { rm -f "$TMP_ICC"; }
trap cleanup EXIT

# extract the embedded profile (everything after the marker) and decode
awk '/^__ICC_PROFILE_BELOW__/ {found=1; next} found {print}' "$0" | base64 -d > "$TMP_ICC"

# run ImageMagick
magick "$INPUT" \
  -define quantum:format=floating-point \
  -colorspace sRGB \
  -auto-gamma \
  -evaluate Multiply "$MULT" \
  -evaluate Pow "$POW" \
  -depth 16 \
  -profile "$TMP_ICC" \
  "$OUTPUT"

exit 0

__ICC_PROFILE_BELOW__
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