ImageMagick Bash Scripts

.sh_image_functions

# flatColourConvert image.png red
function flatColourConvert() {                                                                                     
    magick convert "$1" -fill "$2" -colorize 100% x.png                                                              
}                                                                                                                                                                                                                                                                                                                                                 

# replaceColours "#1B3057" "#2B373D"                                                                                         
# replaceColours red "#2B373D" 70%                                                                                           
function replaceColours() {                                                                                                  
     magick convert *.png -set filename:original %t -channel RGB -fuzz ${3:-25%} -fill $1 -opaque $2 %[filename:original].png
}   

# smartResize "2400x2400>"
function smartResize() {
    find ./ \( -name "*.[Jj][Pp][Gg]" -o -name "*.[Jj][Pp][Ee][Gg]" \) -exec magick mogrify -resize $1 -sampling-factor 4:2:0 -strip -interlace JPEG -quality 85 -colorspace RGB {} \;
    find ./ \( -name "*.[Pp][Nn][Gg]" \) -exec magick mogrify -strip -resize $1 '{}' \;
}  

# makeThumbPng 100x100>
function makeThumbPng() {
    find ./ \( -name "*.[Pp][Nn][Gg]" \) -exec sh -c 'magick convert -strip -resize $1 "$0" "${0%.*}-$1.png"' {} $1 \;
}

# makeThumbJpg 2400x2400>
function make-thumb-jpg() {
    find ./ \( -name "*.[Jj][Pp][Gg]" -o -name "*.[Jj][Pp][Ee][Gg]" \) -exec sh -c 'magick convert -resize $1 -sampling-factor 4:2:0 -strip -interlace JPEG -quality 85 -colorspace RGB "$0" "${0%.*}-$1.jpg"' {} $1 \;
}

# stackHoverOvers
# Expects files named like icon-off.png and icon-on.png
# Combines and stacks vertically for smooth rollovers
function stackHoverOvers() {                             
    for i in *-off.png ;                                 
        do                                            
            OFF="$i"                                     
            NAME=${OFF%-off.png}                         
            ON=$NAME"-on.png"                            
            magick convert -append $OFF $ON $NAME".png"  
    done                                                 
}