CGM & GMETA Image Converter

Introduction

This BASH script is capable to split CGM / GMETA image files that generated by RIPv4 / NCAR Graphics, and convert them into GIF/JPG/PNG...etc format images.

Note: This script requires "ctrans", "med", "ncgmstat" and "convert", NCAR Graphics and ImageMagick are required.

Usage

Please define the following variables in the Script:

Output directory (variable name: OPDir)
Prefix for output files (variable name: OUTprefix)
Output file format (variable name: OUTformat)
Command argument for ctrans (variable name: ctransArg，Default: -d ps.color)
Command argument for convert (variable name: convertArg，Default: -trim -density 300)

　　After all the variables defined, run this script with: bash CGMConverter.sh YOUR_CGM.cgm
　　You can inquire the supported output format list by the "identify -list format" command. If no other requirements, command argument for ctrans and convert should be leaved as-is. It will go through these processes:

Check the availability of ctrans/med/ncgmstat/convert commands.
Check the input file existence.
Check the output direcotry existence, if not, you will be asked to allow the script to create a new one.
Split input files frame-by-frame with the command "med". (Stored in the output directory temperorary as ncgm format files.)
Format conversion.
Remove temporary files.

Licensing:

This software is licensed under the Creative Commons-GNU GPL version 2.0 or later.

Download Link

Version

File Size

File Format

Released

Script

1.0.0.1

2.70 KB

.sh Script

2014 Aug.1

Fork this branch on GitHub: https://github.com/Cypresslin/CGM_GMETA-Image-Converter
Operating System: Linux
Note: Please make this script executable by "chmod u+x".

Download the required software from their official website: ImageMagick - http://www.imagemagick.org/
　　　　　　　　　　　　　　　　　　　　　　　　　NCL - http://www.ncl.ucar.edu/

Screenshot

Command Line:

Source Code

#!/bin/bash
##############################################################
# CGM/GMETA Image Converter    Copyright (C) 2012 Cypresslin #
#        This script is distributed under GNU GPLv2.         #
# Visit http://cypresslin.web.fc2.com/ for more information. #
#                                                            #
# Usage: bash CGMConverter.sh YOUR_CGM.cgm                   #
##############################################################

#===== User Modification Area =====
INcgm="$1"
OPDir="./Output/"
OUTprefix="CASEName-"
OUTformat=".png"                          # png recommended
ctransArg="-d ps.color"
convertArg="-trim -density 300"
#===== End of User Modification =====
#
TmpFN="Temp-"                             # Temp file prefix
#----- Checking User-Defined Variables -----
OPDir=${OPDir%"/"}"/"                   # Add a "/" after the output directory variable
OUTformat="."${OUTformat#"."}    # Add a "." before the output format variable
#----- Checking necessary tools -----
type ctrans >/dev/null 2>&1 || { echo >&2 "cmd: ctrans not found, NCARGraphics required."; exit 1; }
type med >/dev/null 2>&1 || { echo >&2 "cmd: convert not found, NCARGrphics required."; exit 1; }
type ncgmstat >/dev/null 2>&1 || { echo >&2 "cmd: ncgmstat not found, NCARGraphics required."; exit 1; }
type convert >/dev/null 2>&1 || { echo >&2 "cmd: convert not found, ImageMagick required."; exit 1; }

#----- Checking Existence -----
[ -f $INcgm ] || echo -e "\033[1;31mInput File Does Not Exist!\033[m"; exit 1
# InputFileOK
Frames=`ncgmstat -c $INcgm`
echo -e "File: \033[1;33m$INcgm\033[m , with \033[1;33m$Frames\033[m frames"
if [ -d $OPDir ]; then
    #OutputDirOK
    echo -e "Output File goes to \033[1;33m$OPDir\033[m"
else
    echo "Output DIR Does Not Exist"
    read -p "Creat it Now? (y/n): " MKDIR
    if [ $MKDIR = "y" -o $MKDIR = "Y" ]; then
      echo -en "mkdir $OPDir : \033[1;31m"
      mkdir $OPDir 2>&1 || { echo -e >&2 "\033[m"; exit 1; }
      echo -e "\033[1;33mDONE\033[m"
    else
      echo -e "\033[1;31mProgram Terminated\033[m"
      exit 0
    fi
fi
#===== Generates *.ncgm =====
echo -ne "File Splitting...(${INcgm#*.} > .ncgm) \033[1;31m"
med -e "read $INcgm" -e "split $Frames $OPDir$TmpFN"
if [ $? != 0 ]; then
    echo -e "Splitting FAILED \033[m"
    exit 1
else
    echo -e "\033[1;33mDONE\033[m"
fi
echo "Format Converting... ncgm > ps > $OUTformat"
i=0
while [ $i -lt $Frames ]
do
    let "i = $i + 1"
    TmpFile=`printf $OPDir$TmpFN%03d.ncgm $i`
    OutTmp=`printf $OUTprefix%03d$OUTformat $i`
    ctrans $TmpFile $ctransArg >TEMP.ps
    convert TEMP.ps $convertArg $OPDir$OutTmp
done
echo "Removing Temporary Files"
rm $OPDir*.ncgm
rm TEMP.ps
echo -e "\033[1;33m=== Job Done ===\033[m"