Is it possible to use cache in sixel-based image preview?

[smartding]

The sixel-based image preview in the wiki use the following script. That means chafa is called every time an image is previewed.

Is is possible to use cache, as in the ueberzug-based preview method.

#!/bin/sh
case "$(file -Lb --mime-type -- "$1")" in
  image/*)
    chafa -f sixel -s "$2x$3" --animate off --polite on "$1"
    exit 1
    ;;
  text/*)
    cat "$1"
    ;;
esac

[veltza]

Change exit 1 to exit 0 and it will cache the sixels in memory.

[smartding]

Any side effect for exit 0 you're aware of?

[veltza]

Only increased memory usage because lf never flushes the cache unless you reload files (ctrl-r) or resize the terminal window.

[og900aero]

The sixel-based image preview in the wiki use the following script. That means chafa is called every time an image is previewed.

Is is possible to use cache, as in the ueberzug-based preview method.

I use this preview script for sixel:

#!/bin/sh

image() {
	geometry="$(($2-2))x$3"
	chafa "$1" -f sixel -s "$geometry" --animate false
}

CACHE="$HOME/.cache/lf/thumbnail.$(stat --printf '%n\0%i\0%F\0%s\0%W\0%Y' -- "$(readlink -f "$1")" | sha256sum | awk '{print $1}'))"

case "$(file -Lb --mime-type -- "$1")" in
  image/*)
      image "$1" "$2" "$3" "$4" "$5"
 ;;
 */pdf)
   [ ! -f "${CACHE}.jpg" ] && \
		pdftoppm -jpeg -f 1 -singlefile "$1" "$CACHE"
   image "${CACHE}.jpg" "$2" "$3" "$4" "$5"
   ;;
  video/*)
  [ ! -f "${CACHE}.jpg" ] && \
	ffmpegthumbnailer -i "$1" -o "${CACHE}.jpg" -s 0 -q 5
  image "${CACHE}.jpg" "$2" "$3" "$4" "$5"
  ;;
  *)
      file -ibL "$1" | grep -q text && batorcat "$1" || file -Lb "$1"
   ;;
esac

[smartding]

chafa is still called each time for images.

[og900aero]

chafa is still called each time for images.

So?