I use ImageMagick to crop image, encapsulate the related code to functions.
Here is the code:
convertc2(){
convert $1 -crop $2 "two.png"
}
converto3(){
Delimeter="placeHolder"
if [[ $2 == *"x"* ]]; then
Delimeter="x"
else
Delimeter="X"
fi
First="${2%$Delimeter*}"
Fourth="${2##*+}"
Lhs="${2%%+*}"
Rhs="${2#"$Lhs+"}"
Second="${Lhs##*$Delimeter}"
Third="${Rhs%+*}"
One=$(echo "scale=0 ; $First * 1.5" | bc)
One=${One%.*}
Two=$(echo "$Second * 1.5" | bc)
Two=${Two%.*}
Three=$(echo "$Third * 1.5" | bc)
Three=${Three%.*}
Four=$(echo "$Fourth * 1.5" | bc)
Four=${Four%.*}
Final=$One"X"$Two"+"$Three"+"$Four
echo $Final
convert $1 -crop $Final "three.png"
}
Usage like this:
convertc2 /Users/dengjiangzhou/Desktop/Simulator\ Screen\ Shot\ -\ iPhone\ 8\ -\ 2019-02-20\ at\ 14.39.02.png 300X300+0+0
converto3 /Users/dengjiangzhou/Desktop/Simulator\ Screen\ Shot\ -\ iPhone\ 8\ -\ 2019-02-20\ at\ 14.39.02.png 300X300+0+0
I need the image size of @2X and @3X. So the function converto3 use convertc2 's size and transform to its size.
Delimeter="placeHolder"
if [[ $2 == *"x"* ]]; then
Delimeter="x"
else
Delimeter="X"
fi
I really care about how to improve the above code. The "x" , I may type "X" or "x".
how to use this "${2%$Delimeter*}" insensitive?
And the calculation code in converto3() is very ugly.
