Poor man's rainmeter - mond

wallpaper.sh

#!/bin/bash

num_colors=5 # Analyze the 5 most dominant colors

# Function to check if a string is a 6-digit hexadecimal code
function is_valid_hexadecimal {
  local hex="$1"
  [[ "$hex" =~ ^#[0-9a-fA-F]{6}$ ]] && return 0 || return 1
}

# Function to convert a 6-digit hexadecimal color code to RGB
function hex_to_rgb {
  local hex="$1"
  if is_valid_hexadecimal "$hex"; then
    local r g b
    r=$(printf '%d' "0x${hex:1:2}")
    g=$(printf '%d' "0x${hex:3:2}")
    b=$(printf '%d' "0x${hex:5:2}")
    echo "$r $g $b"
  else
    echo "0 0 0" # Return black if the format is invalid
  fi
}

# Function to convert RGB to hexadecimal
function rgb_to_hex {
  local r="$1"
  local g="$2"
  local b="$3"
  printf "#%02x%02x%02x" "$r" "$g" "$b"
}

# Function to calculate the complementary color from RGB
function calculate_complementary_rgb {
  local r="$1"
  local g="$2"
  local b="$3"
  local comp_r=$((255 - r))
  local comp_g=$((255 - g))
  local comp_b=$((255 - b))
  echo "$comp_r $comp_g $comp_b"
}

function calculate_luminosity {
  local rgb_str="$1"
  local r=$(echo "$rgb_str" | awk '{print $1}')
  local g=$(echo "$rgb_str" | awk '{print $2}')
  local b=$(echo "$rgb_str" | awk '{print $3}')
  local lum=$(( (299 * r + 587 * g + 114 * b) / 1000 ))
  echo "$lum"
}

resolution=$(xrandr --current | grep '*' | awk '{print $1}')

if [[ -n "$resolution" ]]; then
  WIDTH=$(echo "$resolution" | cut -d 'x' -f 1)
  HEIGHT=$(echo "$resolution" | cut -d 'x' -f 2)
  echo "Screen width (X): $WIDTH"
  echo "Screen height (Y): $HEIGHT"
fi

OBJPATH="$HOME/.wallpapers"
image="$OBJPATH/$(date +"%d-%m-%y").jpg"
wget -O "$image" "https://picsum.photos/$WIDTH/$HEIGHT/?random"


# Get the dominant colors and filter only valid hexadecimal codes
dominant_colors_hex=$(convert "$image" -colors "$num_colors" -unique-colors txt: | grep -o '#[0-9a-fA-F]*' | grep -E '^#[0-9a-fA-F]{6}$')

text_color="white" # Default text color

darkest_dominant_color_hex=""
darkest_dominant_rgb="0 0 0" # Initialize with black
darkest_dominant_luminosity=256 # Initialize with a high value

# Iterate over the dominant colors and find the darkest one (lowest luminosity)
while IFS= read -r color_hex; do
  rgb=$(hex_to_rgb "$color_hex")
  r=$(echo "$rgb" | awk '{print $1}')
  g=$(echo "$rgb" | awk '{print $2}')
  b=$(echo "$rgb" | awk '{print $3}')

  # Ensure that the RGB conversion was successful
  if [[ "$r" -ne 0 || "$g" -ne 0 || "$b" -ne 0 ]]; then
    luminosity=$(calculate_luminosity "$rgb")
    if [[ "$luminosity" -lt "$darkest_dominant_luminosity" ]]; then
      darkest_dominant_luminosity="$luminosity"
      darkest_dominant_color_hex="$color_hex"
      darkest_dominant_rgb="$r $g $b"
    fi
  fi
done <<< "$dominant_colors_hex"

echo "Darkest dominant color (hex): $darkest_dominant_color_hex (RGB: $darkest_dominant_rgb)"

# Calculate the complementary color of the darkest dominant color
r_dom=$(echo "$darkest_dominant_rgb" | awk '{print $1}')
g_dom=$(echo "$darkest_dominant_rgb" | awk '{print $2}')
b_dom=$(echo "$darkest_dominant_rgb" | awk '{print $3}')
complementary_rgb=$(calculate_complementary_rgb "$r_dom" "$g_dom" "$b_dom")
comp_r=$(echo "$complementary_rgb" | awk '{print $1}')
comp_g=$(echo "$complementary_rgb" | awk '{print $2}')
comp_b=$(echo "$complementary_rgb" | awk '{print $3}')
text_color_hex=$(rgb_to_hex "$comp_r" "$comp_g" "$comp_b")

echo "Complementary text color (hex): $text_color_hex"

height=$(identify -format "%h" "$image")
margin=$((height / 6))
margin2=$((2 * margin))
line2=$(date +'%d %^B %Y')

convert "$image" -font Anurati-Regular -gravity North \
  -pointsize 100 -fill "$text_color_hex" \
  -annotate +0+"$margin" "$(date +'%^A')" \
  -font DejaVu-Sans -pointsize 50 -fill $text_color_hex -annotate +0+"$margin2" "$line2" \
  "$OBJPATH/wallpaper.jpg"

feh --bg-fill "$OBJPATH/wallpaper.jpg"
echo "Image with text generated in wallpaper.jpg with text color: $text_color_hex"

Here you can find my version of the rainmeter - mond , really love that, but it does not work with my setup, where is a simple script that you can launch at system start. Hope you find it useful