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55 lines
929 B
55 lines
929 B
4 years ago
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#!/bin/bash -eu
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usage() {
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echo >&2 "usage: $0 <input> <output>"
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exit 1
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}
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[[ $# == 2 ]] || usage
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FW_INFILE="$1"
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FW_OUTFILE="$2"
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MIME=`file -b --mime-type "$FW_INFILE"`
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case $MIME in
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image/gif)
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giftopnm "$FW_INFILE" > "$FW_OUTFILE" 2>/dev/null
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;;
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image/jpeg |\
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image/jpg)
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jpegtopnm "$FW_INFILE" > "$FW_OUTFILE" 2>/dev/null
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;;
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image/png)
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pngtopnm "$FW_INFILE" > "$FW_OUTFILE" 2>/dev/null
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;;
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image/x-ms-bmp |\
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image/bmp |\
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image/x-bmp |\
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image/x-bitmap |\
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image/x-xbitmap |\
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image/x-win-bitmap |\
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image/x-windows-bmp |\
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image/ms-bmp)
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bmptoppm "$FW_INFILE" > "$FW_OUTFILE" 2>/dev/null
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;;
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*)
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echo "Unknown file contents. [$MIME]" >&2
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exit 1
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;;
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esac
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MIME2=`file -b --mime-type "$FW_OUTFILE"`
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case $MIME2 in
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image/x-portable-pixmap |\
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image/x-portable-bitmap |\
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image/x-portable-greymap)
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#temporary file created
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;;
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*)
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echo "Failed to convert file. [$MIME => $MIME2]" >&2
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exit 1
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;;
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esac
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exit 0
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