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683967d7cd
Only PNG is supported for now. Compression is achieved using pngquant followed by zopflipng. usage: optimize-image file.png [file...] - creates a copy called file-original.png - compresses file.png - prints result as percentage of original file size
68 lines
2.0 KiB
Bash
Executable File
68 lines
2.0 KiB
Bash
Executable File
#!/bin/bash
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# vars
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SELF="${BASH_SOURCE[0]}"
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SELF_DIR=$(cd $(dirname "${BASH_SOURCE[0]}") && pwd -P)
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SELF_DIR="${SELF_DIR:-$(pwd)}"
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TOOLS_BIN="${SELF_DIR}/../tools/local/bin"
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function backup_original { # backup_original $FILE
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local FILE FILE_BASE FILE_EXT
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FILE="${1}"
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if [[ "${FILE:-}" == "" ]]; then
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echo "file not specified" >&2
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return 1
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fi
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if [[ ! -e "${FILE}" ]]; then
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echo "file does not exist: ${FILE}" >&2
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return 1
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fi
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FILE_BASE="${FILE%.*}"
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FILE_EXT="${FILE##*.}"
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if [[ -e "${FILE_BASE}-original.${FILE_EXT}" ]]; then
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echo "backup already exists for file: ${FILE}" >&2
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return 1
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fi
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cp "${FILE}" "${FILE_BASE}-original.${FILE_EXT}"
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return 0
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}
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if [[ "${#@}" -eq 0 ]]; then
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echo "no files specified" >&2
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exit 1
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fi
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ERRORS=()
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for IMAGE in "${@}"; do
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if [[ -e "${IMAGE}" ]]; then
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IMAGE_SIZE=$(wc -c <"${IMAGE}")
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IMAGE_EXT="${IMAGE##*.}"
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case "${IMAGE_EXT}" in
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png)
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if backup_original "${IMAGE}" && "${TOOLS_BIN}/pngquant" 256 --speed 3 --quality 80-100 --force --skip-if-larger --output "${IMAGE}" "${IMAGE}" >/dev/null 2>&1 && "${TOOLS_BIN}/zopflipng" --lossy_transparent --filters=0pme -y "${IMAGE}" "${IMAGE}" >/dev/null 2>&1; then
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IMAGE_SIZE_NEW=$(wc -c <"${IMAGE}")
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IMAGE_SIZE_PERCENT=$(awk -v s1="${IMAGE_SIZE}" -v s2="${IMAGE_SIZE_NEW}" 'BEGIN { printf "%.1f", (s2/s1) * 100 }')
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echo -n "[${IMAGE_SIZE_PERCENT}%]"
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echo -ne "\t"
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echo "${IMAGE}"
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else
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echo "unable to process file: ${IMAGE}" >&2
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ERRORS+="${IMAGE}"
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fi
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;;
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*)
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echo "file type '${IMAGE_EXT}' not handled: ${IMAGE}" >&2
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ERRORS+="${IMAGE}"
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;;
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esac
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else
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ERRORS+="${IMAGE}"
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fi
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done
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if [[ "${#ERRORS[@]}" -ne 0 ]]; then
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exit 1
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fi
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# done
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exit 0
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