Astonia 3 (PC)

[hollinar]

Hello. Can anyone work on the following?

Astonia 3
http://www.astonia.com/
Free 30-day trial, no CC info needed
File with info attached as astonia.zip

[Savage]

at 1rst looks zlib packed file

[hollinar]

Zlib... Does that mean that there is already a way to extract/inject data from the files?

[Savage]

i unpacked the exmaple but the files are empty

[Mr.Mouse]

Nope, they are not. The files are indeed Zlib compressed and you can decompress them.

Use this MexScript :

Code: Select all

# Astonia *.PAK file MexScript 
# By Mr.Mouse 
# Files are ZLib compressed
# But no UCSize is saved in here!
# So, I set the max UCSize to 100000
ComType ZLib1 ;
Get Date Long 0 ;
Get FileNum Long 0 ;
For T = 1 To FileNum ;
Get Offset Long 0 ;
Get CSize Long 0 ;
Get UCSize Long 0 ;
Get CType Long 0;
Math Offset += 8 ;
Set FN String ".dec" ;
Set FP String "file" ;
String FP += UCSize ;
String FP += FN ;
Set UCSize Long 1000000 ;
CLog FP Offset CSize 0 0 UCSize 0 ;
Next T ;

The problem is that there is no "uncompressed size" variable saved in the pak file. There is some kind of counter that starts at 10000, this may also refer to the 0010000.pak . Anyway, I gave a max decompression size of 1000000. There are no file names in there, but the files will be extracted as fileXXXXX.dec.

You can copy the script to a text file and then run that as MexScript on a PAK file of your choice. Or, get the attached txt file.

[WaynesWorld]

Okay - I'm trying to get to the graphics in Astonia 3 - I've got the MexScript below detecting and extacting individual files from the original .pak files, however, the resulting files are worthless. The files themselves when you look at them in a hex editor are not anything useful that I can determine.

So - my questions are:

1) What am I doing wrong that is creating files that are not .bmp files (this game shows everything as a .bmp file in version 2 so I'm assuming that true on version 3 as it appears to be built the same way by the same solo programmer...) The files don't open in any graphical editor (photoshop, paint, gimp, etc).

2) Did the script file have it wrong?

Waynesworld

[Mr.Mouse]

I'd have to have example archives to check.

[WaynesWorld]

You can download the source and the MexScript from here:

Source File: http://66.28.242.115/00216000.pak

MexScript: http://66.28.242.115/pak.txt

BTW: Hexediting revealed on the main game executable that the graphics are .png - not .bmp after all.

Thx!

[Mr.Mouse]

Ok, thanks. Will take a look.

[asmxtx]

The problem is that there is no "uncompressed size" variable saved in the pak file.

That's not correct. There are gaps between the compressed ZLIB-blocks. The decompressed size is located there.

[Mr.Mouse]

Hmm, indeed huh? I'll take a look. Might be different versions?? Hmmmmm

[Mr.Mouse]

Code: Select all

# Astonia *.PAK file MexScript 
# By Mr.Mouse 
# Files are ZLib compressed
ComType ZLib1 ;
Get Date Long 0 ;
Get FileNum Long 0 ;
For T = 1 To FileNum ;
Get Offset Long 0 ;
Get CSize Long 0 ;
Get UCSize Long 0 ;
Get CType Long 0;
SavePos CP 0 ;
GoTo Offset 0 ;
Get CSize Long 0 ;
Get UCSize Long 0 ;
SavePos Offset 0 ;
Set FN String ".dec" ;
Set FP String "file" ;
String FP += UCSize ;
String FP += T ;
String FP += FN ;
CLog FP Offset CSize 0 0 UCSize 0 ;
GoTo CP 0 ;
Next T ;

There, updated. However, the original script did extract the files in the .PAK file correctly. They are raw bitmaps, with no palette or compression.

See below for examples.

file1040.jpg

file2544.jpg

File 216000.jpg

[WaynesWorld]

Thank you! That's perfect!