Sunsplode HDR Script

README.md

Based on https://sharpletters.net/2025/04/16/hdr-emoji/

If you thought HDR emojis were annoying, just wait until you see this sunsploding HDR emoji.

sunsplode.sh

#!/bin/bash

# Crate a gif of a sunsplode effect on an image
# Usage: ./sunsplode.sh input.png

input="$1"
base="${input%.*}"
output="${base}-sunsplode.gif"

# Create output directory
mkdir -p "${base}-sunsplode"

# Loop through increments of 0.1 from 0.1 to 2.0
for i in $(seq 0.6 0.2 3.0) $(seq 3.0 -0.2 0.6); do
    # Use a counter for sequential file naming
    counter=$((counter + 1))
    multiplier=$(printf "%.1f" "$i")
    output_file="${base}-sunsplode/frame_$(printf "%03d" $counter).png"

    magick "$input" \
        -define quantum:format=floating-point \
        -colorspace RGB \
        -auto-gamma \
        -evaluate Multiply "$multiplier" \
        -evaluate Pow 0.9 \
        -colorspace sRGB \
        -depth 16 \
        -profile ~/.dotfiles/bin/2020_profile.icc \
        "$output_file"

    echo "Created $output_file"
done

magick "${base}-sunsplode/frame_*.png" -delay 0 -loop 0 "${output}"

rm -rf "${base}-sunsplode"

echo "Created ${output}"