How can I extract the .jpg / .png components of a .hpi file?

Question

I stumbled upon my rather ancient disks with photo objects and, unfortunately, I found out that the company (hemera) no longer supports it. this left me with a whole bunch of .hpi files. Fortunately, I found this information on extracting jpg and png file components.

Unfortunately, I could not get it to work. Can anyone understand what happened to this code? I would be pleased with the PHP or Python solution if Perl weren't your thing. :)

open(I, "$name") || die;
binmode(I);
$_ = <I>;
close(I);

my ($j, $p) = m|^.{32}(.*)(\211PNG.*)$|s;
open(J, ">$name.jpg") &&
    do { binmode(J); print J $j; close J; };
open(P, ">$name.png") &&
    do { binmode(P); print P $p; close P; };

This uses the hexdump of the current test file, which I hooked from the CD, if it helps at all:

0000000 89 48 50 49 0d 0a 1a 0a 64 00 00 00 20 00 00 00
0000010 45 89 00 00 65 89 00 00 0a 21 00 00 00 d0 d0 00

Answer 1

, . C, :

#include <stdio.h>
#include <stdlib.h>

#define MAX_SIZE 1048576

char stuff[MAX_SIZE];

int main (int argc, char **argv)
{
    unsigned int j_off, j_len, p_off, p_len;
    FILE *fp, *jp, *pp;
    fp = fopen (argv[1], "r");
    if (!fp)    goto error;
    if (fseek (fp, 12, SEEK_SET))   goto error;
    if (!fread (&j_off, 4, 1, fp))  goto error;
    if (!fread (&j_len, 4, 1, fp))  goto error;
    if (!fread (&p_off, 4, 1, fp))  goto error;
    if (!fread (&p_len, 4, 1, fp))  goto error;
    fprintf (stderr, "INFO %s \t%d %d %d %d\n",
        argv[1], j_off, j_len, p_off, p_len);
    if (j_len > MAX_SIZE || p_len > MAX_SIZE) {
        fprintf (stderr, "%s: Chunk size too big!\n", argv[1]);
        return EXIT_FAILURE;
    }

    jp = fopen (argv[2], "w");
    if (!jp)    goto error;
    if (fseek (fp, j_off, SEEK_SET))    goto error;
    if (!fread (stuff, j_len, 1, fp))   goto error;
    if (!fwrite (stuff, j_len, 1, jp))  goto error;
    fclose (jp);

    pp = fopen (argv[3], "w");
    if (!pp)    goto error;
    if (fseek (fp, p_off, SEEK_SET))    goto error;
    if (!fread (stuff, p_len, 1, fp))   goto error;
    if (!fwrite (stuff, p_len, 1, pp))  goto error;
    fclose (pp);
    fclose (fp);
    return EXIT_SUCCESS;

error:
    perror (argv[1]);
    return EXIT_FAILURE;
}

input.hpi output.jpg output.png. 100% , , , - , , . MAX_SIZE.

script, *.hpi:

#!/bin/bash

dest=<destination-folder>

for arg in "$@"
do
  base=`echo $arg | cut -d'.' -f1`
  <executable> $arg $dest/original/$base.jpg $dest/mask/$base.png 2>>$dest/log
  #composite -compose CopyOpacity $dest/mask/$base.png $dest/original/$base.jpg $dest/rgba/$base.png
done

( ImageMagick) PNG, -. , 5 , .

, HPI . , PNG.

Answer 2

MS Word. , . PNG, :

#!/usr/bin/perl
use strict;

my $HEADER = "\211PNG";
my $FOOTER = "IEND\xAEB`\x82";

foreach my $file ( @ARGV )
     {
     print "Extracting $file\n";
     (my $image_base = $file) =~ s/(.*)\..*/$1/;

     my $data = do { local $/; open my( $fh ), $file; <$fh> };

     my $count = 0;

     while( $data =~ m/($HEADER.*?$FOOTER)/sg )
        {
        my $image      = $1;
        $count++;
        my $image_name = "$image_base.$count.png";
        open my $fh, "> $image_name" or warn "$image_name: $!", next;
        print "Writing $image_name: ", length($image), " bytes\n";
        print $fh $image;
        close $fh;
        }

    }


__END__

Answer 3

Not your own decision, but this application, which is free for personal use, states that it can convert hpi files.

Answer 4

For those who come here Google, I wrote a Python script that solves this problem only for PNG images:

#!/usr/bin/python
# -*- coding: utf-8 -*-
import re, sys

def main():
  if len(sys.argv) < 2:
    print """Usage:
  {0} BINARY_FILE PNG_PATH_TEMPLATE
Example:
  {0} bin/program 'imgs/image.{{0:03d}}.png'""".format(__file__)
    return
  binfile, pngpath_tpl = sys.argv[1:3]

  rx = re.compile("\x89PNG.+?IEND\xAEB`\x82", re.S)
  bintext = open(binfile, "rb").read()
  PNGs = rx.findall(bintext)

  for i, PNG in enumerate(PNGs):
    f = open(pngpath_tpl.format(i), "wb") # Simple string format.
    f.write(PNG)
    f.close()

if __name__ == "__main__":
  main()

Answer 5

The files .jpegand .movhave recoverjpeg , which I tested in linux (but can be compatible with other platforms).

On some debian systems, it is available through apt get install recoverjpeg