mirror of
https://github.com/kuhyx/testsAndMisc.git
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118 lines
2.2 KiB
Bash
Executable File
118 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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# pdf_to_png.sh (magick-only backend, behaves like pdf_to_image)
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#
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# Convert one or more PDF files to image files using ImageMagick v7 `magick`.
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# Default output format is jpg, but can be changed with -f.
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OUTPUT_DIR=""
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OUTPUT_FORMAT="jpg"
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PDF_FILES=()
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log() {
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printf '[%s] %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$*"
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}
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usage() {
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cat << EOF
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Usage:
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$(basename "$0") [OPTIONS] PDF_FILE [PDF_FILE...]
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Convert one or more PDF files to images using ImageMagick 'magick'.
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Options:
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-o DIR Output directory (default: current directory)
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-f FORMAT Output image format (default: jpg)
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-h Show this help
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Examples:
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$(basename "$0") file.pdf
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$(basename "$0") -f png file1.pdf file2.pdf
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$(basename "$0") -o out -f webp file.pdf
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EOF
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}
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ensure_magick() {
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if ! command -v magick > /dev/null 2>&1; then
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echo "Error: 'magick' (ImageMagick v7) is not installed or not in PATH." >&2
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exit 1
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fi
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}
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parse_args() {
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local opt
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OUTPUT_DIR=""
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OUTPUT_FORMAT="jpg"
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PDF_FILES=()
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while getopts ":o:f:h" opt; do
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case "$opt" in
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o)
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OUTPUT_DIR="$OPTARG"
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;;
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f)
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OUTPUT_FORMAT="$OPTARG"
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;;
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h)
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usage
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exit 0
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;;
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*)
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usage
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exit 1
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;;
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esac
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done
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shift $((OPTIND - 1))
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if [[ $# -lt 1 ]]; then
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echo "Error: at least one PDF file must be specified." >&2
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usage
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exit 1
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fi
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PDF_FILES=("$@")
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if [[ -z ${OUTPUT_DIR:-} ]]; then
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OUTPUT_DIR="${PWD}"
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fi
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if [[ ! -d $OUTPUT_DIR ]]; then
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mkdir -p "$OUTPUT_DIR"
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fi
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}
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convert_pdf() {
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local pdf_file="$1"
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local base name out_pattern
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name="$(basename "$pdf_file")"
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base="${name%.*}"
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out_pattern="${OUTPUT_DIR%/}/${base}_page-"
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log "Converting '$pdf_file' to $OUTPUT_FORMAT using magick -> ${out_pattern}*.${OUTPUT_FORMAT}"
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magick -density 300 "$pdf_file" -quality 90 "${out_pattern}%d.${OUTPUT_FORMAT}"
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}
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main() {
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ensure_magick
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parse_args "$@"
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local pdf
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for pdf in "${PDF_FILES[@]}"; do
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if [[ ! -f $pdf ]]; then
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echo "Warning: '$pdf' is not a regular file, skipping." >&2
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continue
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fi
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convert_pdf "$pdf"
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done
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log "Done converting PDFs to ${OUTPUT_FORMAT}. Output directory: $OUTPUT_DIR"
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}
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main "$@"
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