77 lines
1.8 KiB
Bash
Executable File
77 lines
1.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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# USAGE
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# ./convertToPng <input png or ico> <outfilename>.png
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# Example
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# ./convertToPng ~/sample.ico ~/Desktop/converted.png
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set -e
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HAVE_IMAGEMAGICK=
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HAVE_GRAPHICSMAGICK=
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type convert &>/dev/null && type identify &>/dev/null && HAVE_IMAGEMAGICK=true
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type gm &>/dev/null && gm version | grep GraphicsMagick &>/dev/null && HAVE_GRAPHICSMAGICK=true
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if [[ -z "$HAVE_IMAGEMAGICK" && -z "$HAVE_GRAPHICSMAGICK" ]]; then
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type convert >/dev/null 2>&1 || echo >&2 "Cannot find required ImageMagick 'convert' executable"
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type identify >/dev/null 2>&1 || echo >&2 "Cannot find required ImageMagick 'identify' executable"
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type gm &>/dev/null && gm version | grep GraphicsMagick &>/dev/null && echo >&2 "Cannot find GraphicsMagick"
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echo >&2 "ImageMagic or GraphicsMagic is required, please ensure they are in your PATH"
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exit 1
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fi
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CONVERT="convert"
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IDENTIFY="identify"
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if [[ -z "$HAVE_IMAGEMAGICK" ]]; then
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# we must have GraphicsMagick then
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CONVERT="gm convert"
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IDENTIFY="gm identify"
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fi
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# Parameters
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SOURCE="$1"
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DEST="$2"
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# Check source and destination arguments
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if [ -z "${SOURCE}" ]; then
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echo "No source image specified"
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exit 1
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fi
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if [ -z "${DEST}" ]; then
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echo "No destination specified"
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exit 1
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fi
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# File Infrastructure
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NAME=$(basename "${SOURCE}")
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BASE="${NAME%.*}"
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TEMP_DIR="convert_temp"
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function cleanUp() {
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rm -rf "${TEMP_DIR}"
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}
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trap cleanUp EXIT
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mkdir -p "${TEMP_DIR}"
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# check if .ico is a sequence
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# pipe into cat so no exit code is given for grep if no matches are found
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IS_ICO_SET="$($IDENTIFY "${SOURCE}" | grep -e "\w\.ico\[0" | cat )"
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$CONVERT "${SOURCE}" "${TEMP_DIR}/${BASE}.png"
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if [ "${IS_ICO_SET}" ]; then
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# extract the largest(?) image from the set
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cp "${TEMP_DIR}/${BASE}-0.png" "${DEST}"
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else
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cp "${TEMP_DIR}/${BASE}.png" "${DEST}"
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fi
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rm -rf "${TEMP_DIR}"
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trap - EXIT
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cleanUp
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