#!/bin/sh - # # gif2anim [options] image_anim.gif... # # This script uses the ImageMagick 'convert' program to take a gif animation # (normally ending in '_anim.gif' and NOT just '.gif') and converts it into a # collection of X Pixmap files (or GIFs) as well as a "animation sequence # file" which lists all settings needed to re-build the original GIF # animation. # # OPTIONS # -g use an gif suffix for frmae images (def: xpm) # -s suffix use this suffix for the frame images # -n skip frame images, just create the '.anim' file # -b framename basename for the individual frames # -a framename only do animations named '_anim.gif' # -o file.anim output to this .anim file (- for stdout) # -l just list the anim file to stdout, no images # -v Be verbose in animation conversions # # The animation file uses the string "BASENAME" to represent the basenames for # the individual frame images that it loads when re-creating the original GIF # animation. This allows you to specify a different set of images without # changling any other settings. # # NOTE: This script reqires both the ImageMagick 'convert' program and # 'identify' programs to extract the images and information needed. # #### # # WARNING: Input arguments are NOT tested for correctness. # This script represents a security risk if used ONLINE. # I accept no responsiblity for misuse. Use at own risk. # # Anthony Thyssen 25 April 1996 # # 1 November 2005 Expanded with options for basename handling. # PROGNAME=`type $0 | awk '{print $3}'` # search for executable on path PROGDIR=`dirname $PROGNAME` # extract directory of program PROGNAME=`basename $PROGNAME` # base name of program Usage() { echo >&2 "$PROGNAME:" "$@" sed >&2 -n '/^###/q; s/^#$/# /; 3s/^#/# Usage:/; 3,$s/^# //p;' \ "$PROGDIR/$PROGNAME" exit 10; } sfx="gif" # Default output suffix of images to produce init=1 # the count for the first frame in sequence fmt="%03d" # The format for frame count frames=true # output frame images by defult basename= # use this name for the individual frame images animfile= # no default animfile to output to. all_gifs= # forcefully convert any ".gif" file VERBOSE= # be verbose awk=awk while [ $# -gt 0 ]; do case "$1" in -g) sfx="gif" ;; # output frame images as GIF's (default) -x) sfx="xpm" ;; # output frame images as XPM's -s) sfx="$1"; shift ;; # output frame images with this suffix -n) frames= ;; # don't output any individual frames -b) basename="$2"; shift ;; # use this basename for frames -o) animfile="$2"; shift ;; # output .anim file here -l) frames=; animfile=- ;; # List anim file to standard output, no images -v) VERBOSE=true ;; # Be verbose --) shift; break ;; # end of user options -*) Usage "Unknown option \"$1\"" ;; *) break ;; # end of user options esac shift # next option done if [ $# -eq 0 ]; then Usage "No GIF animations given" fi # echo without return (all systems, including old BSD systems) if [ "X`echo -n`" = "X-n" ]; then echo_n() { echo ${1+"$@"}"\c"; } else echo_n() { echo -n ${1+"$@"}; } fi # Is the command available on this machine? cmd_found() { case "`type $1 2>&1`" in *'not found'*) return 1 ;; esac; return 0 } cmd_found convert || Usage "No IM convert command found -- ABORTING" cmd_found identify || Usage "No IM identify command found -- ABORTING" # output animation details to stdout if [ "X$animfile" = "X-" ]; then animfile=/dev/stdout fi # use gawk if it is present. (mawk has a parse bug under Ubuntu) if cmd_found gawk; then awk=gawk fi # ----------------------------------------------------- for i in "$@" ; do [ "$VERBOSE" ] && echo_n "converting \"$i\" " if [ ! -f "$i" ]; then echo >&2 "Unable find file \"$i\"" continue fi # --- find out the type --- name="`expr "//$i" : '.*/\([^/]*\)'`" # remove path to file suffix="`expr "$name" : '.*\.\([^./]*\)$'`" # extract last suffix name="`expr "$name" : '\(.*\)\.[^.]*$'`" # remove last suffix case "$name.$suffix" in *.gif ) ;; * ) [ "$VERBOSE" ] && echo_n "${b}" echo >&2 "Skipping non-GIF file: \"$i\"" continue ;; esac name=`echo "$name" | sed 's/_anim//'` # remove any "_anim" part [ "$basename" ] && name=$basename anim_output=${animfile:-"$name.anim"} # Generate Animation file... date=`date +'%Y-%m-%d %R:%S'` #giftrans -L "$i" 2>&1 | identify -verbose "$i" | $awk '# This is designed to parse either IM "identify", or "giftrans" BEGIN { print "#"; print "# Animation Sequence File \"'"$i"'\""; print "# using a BASENAME of \"'"$name"'\""; print "# Extracted on '"$date"'"; print "#"; frame='"$init"' last_offset="+0+0"; } /Application Extension/ { print "-loop 20"; } # FUDGE IT! /Iterations:/ { if ( ! loop ) { print "-loop " $NF; loop = 1; } } /Delay Time:/ || /Delay:/ { delay = $NF; } /Disposal Method:/ { dispose = $3 } /Dispose:/ { dispose = $NF; } /Image Width:/ { size = $(NF-1); } /Image Height:/ { size = size "x" $(NF-1); } /Geometry:/ { size = $NF; } /Logical Screen Width:/ { canvas = $(NF-1); } /Logical Screen Height:/{ canvas = canvas "x" $(NF-1); } /Image Left Position:/ { offset = "+" $(NF-1); } /Image Top Position:/ { offset = offset "+" $(NF-1); } /Page geometry:/ { canvas = substr($NF,0,match($NF, "+" )-1 ); offset = substr($NF, match($NF, "+" ) ); } # End of the data for this frame /Table Based Image Data:/ || /Version:/ { if ( delay != last_delay ) { print "-delay " delay; last_delay = delay; } delay=0; # no delay is given if it is set to zero if ( dispose != last_dispose ) { print "-dispose " dispose; last_dispose = dispose; } if ( ! c_set ) { print "-page " canvas; c_set = 1; } if ( offset != last_offset ) { printf "%-14s ", "-page " offset; last_offset = offset; } else { printf "%-14s ", ""; } printf "BASENAME_'"$fmt.$sfx"' #size %s\n", frame++, size; } ' > $anim_output [ "$VERBOSE" -a -f "$anim_output" ] && echo_n "`grep -c \\.$sfx\$ ${name}.anim | tr -d ' '` frames" # split up GIF animation if [ "$frames" ]; then convert -delay 0 -dispose none -loop 0 "$i" +repage \ -scene $init +adjoin "${name}_${fmt}.${sfx}" # Fix the X Pixmap color tables # using the AIcons Library "xpm-fix" script if [ "$sfx" = 'xpm' ] && cmd_found xpm-fix; then [ "$VERBOSE" ] && echo_n " pixmap-fixes" xpm-fix `sed -n "s/ *BASENAME_/${name}_/p" ${name}.anim` fi fi [ "$VERBOSE" ] && echo " DONE" done