init

1 files changed, 226 insertions, 0 deletions

diff --git a/pdf2png b/pdf2png
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+#!/bin/bash
+###############################################################################
+#                                                                             # 
+#    Martin Bruchanov, bruxy at regnet dot cz                                 #
+#                                                                             # 
+#    http://bruxy.regnet.cz/                                                  #
+#                                                                             # 
+#    Version: 1.2 (Fri Jul 20 13:17:18 CEST 2012)                             #
+#                                                                             # 
+###############################################################################
+
+## Defaults
+DEFAULT_DPI=300    # default output dpi
+GS_DPI=300         # gs will rasterize to this size, before resizing
+UNSHARP_RADIUS=1.0 # bitmap enhancing with unsharp mask
+COLORS=16777216    # default num. of colors, use 16, 256,...
+
+## Global variables
+PAGE_START=1       
+PAGE_STOP=1
+WIDTH=0
+HEIGHT=0
+PAGE=0
+ALL=0
+
+## Help
+print_help(){
+	echo "PDF2PNG"
+	echo "Usage: " `basename $0` [OPTIONS] FILE
+	echo
+	echo "Options:"	
+	echo "	-h   ... this help"
+	echo "	-a   ... convert all pages"
+	echo "	-f N ... from page number N"
+	echo "	-t N ... to page number N"
+	echo "	-p N ... only page N (default N = 1)"
+	echo "	-d N ... resolution in dpi (default N = $DEFAULT_DPI)"
+	echo "	-x N ... bitmap  width in pixel (if y not given, save aspect ratio)"
+	echo "	-y N ... bitmap height in pixel (if x not given, save aspect ratio)"
+	echo "	-u N ... unsharp radius (default N = $UNSHARP_RADIUS)"
+    echo "	-c N ... number of colors (default N = $COLORS)"
+	echo 
+}
+
+# definition of color escape sequences for ANSI terminal
+RED="\033[01;31m"
+GREEN="\033[01;32m"
+
+color_echo(){
+# 1 -- color escape sequncy
+# 2 -- string
+# \033[0m -- reset color settings
+  echo -e "$1 $2 \033[0m"
+}
+
+
+test_return(){
+# 1 -- return code $?
+# 2 -- description of operation
+echo -e -n $2:
+COL=40
+# move cursor to column $COL 
+echo -en "\033[${COL}G"
+if [ $1 -eq 0 ] 
+then
+	color_echo $GREEN OK
+else
+	color_echo $RED FALSE
+	exit 1
+fi
+}
+
+if [ $# -lt 1 ] # print help
+then
+    print_help
+    exit 1
+fi
+
+## Process CLI
+
+while getopts "af:t:d:hx:y:w:u:p:c:" name
+do
+	case $name in
+	a)	ALL=1
+	;;
+	f)	PAGE_START=$OPTARG
+	;;
+	t)	PAGE_STOP=$OPTARG
+	;;
+	p)	PAGE=$OPTARG
+	;;
+	d) 	DEFAULT_DPI=$OPTARG
+	;;
+	x)	WIDTH=$OPTARG
+	;;
+	y)	HEIGHT=$OPTARG
+	;;
+	u)	UNSHARP_RADIUS=$OPTARG
+	;;
+	c)	COLORS=$OPTARG
+	;;
+	h)	# help
+		print_help
+		exit 0
+	;;
+	\?)
+		echo "Invalid option!"
+		exit 1
+	;;
+	esac
+done
+
+
+shift $(($OPTIND - 1));
+
+INPUT=$1
+
+OUTPUT=$(basename $INPUT .pdf)
+
+echo "Input file: $INPUT"
+
+## Check all input parameters and set options
+
+if [ -z "$INPUT" ]
+then
+	echo "No input file!"
+	exit 1
+fi
+
+# All pages processing
+
+MAX_PAGE=`pdfinfo "$INPUT" | grep Pages | awk '{ print $2}'`
+
+if [ -z $MAX_PAGE ]; then exit; fi
+
+if [ $ALL -eq 1 ]
+then
+	PAGE_START=1
+	PAGE_STOP=$MAX_PAGE
+fi
+
+# Page range processing
+
+if [ $PAGE_START -gt 1 ]
+then
+	if [ $PAGE_STOP -eq 1 ]
+	then
+		PAGE_STOP=$MAX_PAGE
+	fi
+fi
+
+if [ $PAGE_STOP -gt 1 ]
+then
+	if [ $PAGE_START -eq 1 ]
+	then
+		PAGE_START=1
+	fi
+fi
+
+if [ $PAGE -gt 0 ]
+then
+	PAGE_START=$PAGE
+	PAGE_STOP=$PAGE
+fi
+
+# Image size
+
+if [ $WIDTH -gt 0 ]
+then
+	if [ $HEIGHT -gt 0 ]
+	then
+		RESIZE=${WIDTH}x${HEIGHT}\!
+	else
+		RESIZE=${WIDTH}x
+	fi
+	DEFAULT_DPI=0
+fi
+
+if [ $HEIGHT -gt 0 ]
+then
+	if [ $WIDTH -gt 0 ]
+	then
+		RESIZE=${WIDTH}x${HEIGHT}\!
+	else
+		RESIZE=x${HEIGHT}
+	fi
+	DEFAULT_DPI=0
+fi
+
+if [ $DEFAULT_DPI -gt 0 ]
+then
+	RESIZE=$(((DEFAULT_DPI*100)/GS_DPI))"%"
+fi
+
+echo $RESIZE
+#exit
+
+##############################################################################
+
+echo "Rasterizing pages from $PAGE_START to $PAGE_STOP."
+echo "Output image size: $RESIZE"
+
+j=1
+N=$((PAGE_STOP-PAGE_START+1))
+for i in `seq $PAGE_START $PAGE_STOP`
+do
+	i=`printf %04u $i`
+	echo "Processing page no. $i ($j/$N)"
+	TMP=/tmp/tmp-${i}.png
+	gs -q -sDEVICE=png16m -dBATCH -dNOPAUSE \
+		-dFirstPage=$i -dLastPage=$i -r$GS_DPI \
+		 -sOutputFile=$TMP "$INPUT" > /dev/null 2>&1
+
+	test_return $? "GhostScript conversion"	
+
+	convert \
+		-unsharp "$UNSHARP_RADIUS" \
+		-resize "${RESIZE}" \
+		-colors $COLORS +dither \
+		$TMP png:${OUTPUT}_${i}.png 
+
+	rm -f $TMP
+	: $((j++))
+done
+
+