.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 '{}' \;
}

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

# make-thumb-jpg "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
}

function png2mp4() {
    ffmpeg -framerate 12 -pattern_type glob -i '*.png' -c:v libx264 -pix_fmt yuv420p "out${1}.mp4";
    mkdir "stills${1}";
    find ./ -maxdepth 1 -name '*.png' -exec mv {} "./stills${1}" \;
}