/useful/trunk-1 : revision 23

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# 2021-01-13

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# * fixed up the if statments.

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#

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# 2024-07-10

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# * Added sanity check

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# * General logic fixes.

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# * Added --author argument

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# * Fixed help message formating

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####

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__DPI=300

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__IN_FILE=

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__OUT_FILE=big_image

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__PERSERVE_TMP=false

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__INVERT_COLOURS=false

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__NO__PANDOC_HEADER=false

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__NO_PANDOC_HEADER=false

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__CWD=$PWD

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"

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__TITLE=""

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echo "-----"

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echo "---"

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echo "--"

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echo "-"

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__AUTHOR=""

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__SANITY=true

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__SCRIPT_ROOT=$(dirname $(readlink -f $0))

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source $__SCRIPT_ROOT/useful.inc.sh

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function __usage () {

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echo ""

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echo "---------------------"

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echo ""

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echo "-h --help"

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echo "-h --help"

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echo " Print this help message"

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echo ""

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echo "-i <file> --input <file>"

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echo "-i <file> --input <file>"

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echo " The file to use to convert to an image. "

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echo ""

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echo "-o <file> --output <file>"

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echo "-o <file> --output <file>"

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echo " The image to output to. (Default=big_image.png)"

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echo ""

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echo "-d <integer> -- dpi <integer>"

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echo "-d <integer> --dpi <integer>"

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echo " Set the dpi of the intermediate image relative to an a5 paper."

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echo " (Default=300)"

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echo ""

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echo "-p --perserve"

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echo "-p --perserve"

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echo " Do not delete the TMP folder."

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echo ""

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echo "-invert"

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echo "--invert"

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echo " Invert the colours of the final image."

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echo ""

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echo "-t \"name\" --title \"name\""

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echo "-t \"name\" --title \"name\""

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echo " Set the title on the the title page."

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echo ""

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echo "-a \"name\" --author \"name\""

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echo " Set an author to the title page."

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echo ""

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echo "--no-header"

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echo " Do not insert the pandoc header. (Default:"

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echo "$__PANDOC_HEADER"

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echo "---------------------"

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}

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function __sanity_check () {

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# Check that we have the tools needed.

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__find_tool pandoc

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__find_tool xelatex

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__find_tool convert

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__find_tool pdftoppm

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__find_tool pdfcrop

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if [[ $__SANITY == false ]]; then

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echo ""

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echo "Please install the missing tools."

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echo ""

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exit 1

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fi

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}

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function __main () {

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#ESCAPED_CWD=$(echo ${CWD} | sed 's/ /\\ /g' | sed "s/'/\\\'/g" )

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# FIXME: Split the functionality out of the main function.

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# FIXME: Use mkdtemp instead of the folder we are in.

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__parse_args "${@}"

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__sanity_check

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echo "__IN_FILE\: $__IN_FILE"

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echo "__OUT_FILE\: $__OUT_FILE"

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echo "CWD\: $__CWD"

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echo "__DPI: $__DPI"

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#echo "ESCAPED_CWD\: $ESCAPED_CWD"

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if [[ ! -e "$__CWD/$__IN_FILE" ]]

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if [[ ! -e "$__CWD/$__IN_FILE" ]] || [[ -z $__IN_FILE ]]

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then

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echo "!!!in file does not exist!!!"

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echo "The provided <infile> does not exit."

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echo ""

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#print_help

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exit 1

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fi

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cd "$__CWD/tmp"

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# Now we can start the work for this.

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if [[ $__NO__PANDOC_HEADER == false ]]

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if [[ $__NO_PANDOC_HEADER == false ]]

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then

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# FIXME: This is cursed.

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# We add a special header to the file to make it pandoc know what to do.

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#

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# The header is built from the bottom up. The input text at the bottom, and

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# the rest of the "elements" added above.

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printf '%s\n' "---" "$(cat "$__CWD/tmp/text.txt")" > "$__CWD/tmp/text.txt"

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if [ -n __TITLE="" ]

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then

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if [[ ! -z $__TITLE ]]; then

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printf '%s\n' "title: ${__TITLE}" "$(cat "$__CWD/tmp/text.txt")" > "$__CWD/tmp/text.txt"

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fi

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if [[ ! -z $__AUTHOR ]]; then

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printf '%s\n' "author: ${__AUTHOR}" "$(cat "$__CWD/tmp/text.txt")" > "$__CWD/tmp/text.txt"

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fi

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printf '%s' "$__PANDOC_HEADER" "$(cat "$__CWD/tmp/text.txt")" > "$__CWD/tmp/text.txt"

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fi

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# Now we use pandoc to do to convert it to a PDF.

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echo "Generating PDF"

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pandoc --pdf-engine=xelatex "$__CWD/tmp/text.txt" -o "$__CWD/tmp/text.pdf"

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echo "Cropping PDF"

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pdfcrop --margins '10 5 10 5' "$__CWD/tmp/text.pdf" "$__CWD/tmp/text-croped.pdf"

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# Convert it to images

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echo "Converting to images"

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pdftoppm "$__CWD/tmp/text-croped.pdf" "$__CWD/tmp/page" -png -rx $__DPI -ry $__DPI -gray

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# convert make the colour space greyscale and the append to each other

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# If we invert the final image this is where we do it.

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if [[ $__INVERT_COLOURS == true ]]

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then

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echo "Inverting colours"

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convert "$__CWD/tmp/big-page.png" -channel RGB -negate "$__CWD/tmp/big-page-inverted.png"

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FINAL_IMAGE="$__CWD/tmp/big-page-inverted.png"

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else

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FINAL_IMAGE="$__CWD/tmp/big-page.png"

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fi

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echo "Copying final image to $__CWD/$__OUT_FILE.png"

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cp "$FINAL_IMAGE" "$__CWD/$__OUT_FILE.png"

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####

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####

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if [[ $__PERSERVE_TMP == true ]]

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then

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echo "Not cleaning up!"

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echo "Note: Not cleaning up!"

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else

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rm -r "$__CWD/tmp"

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fi

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echo "Done."

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echo ""

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}

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exit 1

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fi

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while [[ $# -gt 0 ]]

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do

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case "${1}" in

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case $1 in

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-i|--input)

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__IN_FILE="$2"

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shift

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shift

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__IN_FILE="$2"

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shift

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shift

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;;

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-o|--output)

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__OUT_FILE="$2"

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shift

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shift

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__OUT_FILE="$2"

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shift

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shift

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;;

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-t|--title)

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__TITLE="$2"

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shift

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shift

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__TITLE="$2"

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shift

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shift

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;;

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-a|--author)

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__AUTHOR="$2"

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shift

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shift

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;;

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-d|--dpi)

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__DPI="$2"

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shift

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shift

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__DPI="$2"

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shift

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shift

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;;

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-p|--perserve)

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__PERSERVE_TMP=true

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shift

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__PERSERVE_TMP=true

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shift

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;;

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--invert)

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__INVERT_COLOURS=true

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shift

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__INVERT_COLOURS=true

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shift

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;;

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--no-header)

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__NO__PANDOC_HEADER=true

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shift

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__NO_PANDOC_HEADER=true

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shift

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;;

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-h|--help)

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__usage

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exit

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shift

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__usage

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exit

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shift

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;;

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*)

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#print_help

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#exit 1

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shift

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echo "Unkown argument \"${1}\"."

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exit 1

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shift

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;;

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--)

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shift

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break

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shift

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break

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;;

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esac

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done

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}

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__parse_args "${@}"

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__main

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__main "${@}"

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echo "-"

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echo "--"

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echo "---"

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echo "----"