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Old 17 January 2019, 21:13   #1
Qube
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Iff pbm

Hi all,


Does anyone know how I can view or convert a weird IFF PBM format image file? (attached)



The file has the FORM header, but then a PBM subtype (Planar Bitmap?). It has a 256 colour CMAP by the looks of it. BODY looks like it's RLE encoded perhaps.



It originated from the MSDOS version of First Samurai, I thought it may open with MSDOS Deluxe Paint but nope.


Just wondered if anyone knew of an existing tool to open these or convert them etc.


It's just a curiosity more than anything!



Cheers!



Q;
Attached Files
File Type: zip SAMURAI.zip (5.4 KB, 40 views)
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Old 17 January 2019, 21:16   #2
Predseda
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https://fileinfo.com/extension/pbm ?
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Old 17 January 2019, 21:22   #3
Hedeon
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IFF PBM are not weird if they are mentioned on the ILBM wiki page.

https://en.wikipedia.org/wiki/ILBM

Of course, it can be modified to prevent easy ripping.

Last edited by Hedeon; 17 January 2019 at 21:28.
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Old 17 January 2019, 21:22   #4
Qube
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Unfortunately not the same PBM file format,

The one I'm after viewing seems to be a specific type of IFF/ILBM - some mention of this here - http://fileformats.archiveteam.org/wiki/ILBM#PBM

Q;
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Old 17 January 2019, 21:24   #5
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Yes agreed not weird, but I am unable to view them in any graphics app. Tried Xnview, IrfanView, Deluxe Paint, various MSDOS viewer.. stumped.



Quote:
Originally Posted by Hedeon View Post
IFF PBM are not weird if they are mentioned on the ILBM wiki page.

https://en.wikipedia.org/wiki/ILBM
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Old 17 January 2019, 21:42   #6
Minuous
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MS-DOS Deluxe Paint image, just a CMAP chunk and a BODY chunk; see screenshot.
Attached Thumbnails
Click image for larger version

Name:	pbm.png
Views:	71
Size:	166.1 KB
ID:	61624  
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Old 17 January 2019, 22:15   #7
Qube
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Hi Minuous,

It's strange as I am unable to open it using MSDOS Deluxe Paint II,

The last version (DP II Enhanced 3.0) just says Bad IFF Form, whereas older releases just say they can't load the file.

Perhaps the file has been manipulated in some way, or protected by the coders/publishers..

Q;
Attached Thumbnails
Click image for larger version

Name:	dp2e3error.jpg
Views:	50
Size:	36.2 KB
ID:	61625  
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Old 17 January 2019, 22:17   #8
Hedeon
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Quote:
Originally Posted by Qube View Post

Perhaps the file has been manipulated in some way, or protected by the coders/publishers..

Q;
I guess our replies got crossed. But indeed, I would bet on this. Gimp also didn't want to load. Others say bad IFF file.
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Old 17 January 2019, 22:39   #9
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I just found a mention in DP IV AGA's manual -

https://computerarchive.org/files/co...Manual-ENG.pdf

Page IV -

5. PBM Support
DeluxePaint IV AGA now reads the PBM (Packed Bitmap) file format. PBMs are output by PC-compatible versions of DeluxePaint.

So, these should open in DP IV AGA, but they don't - it simply reports 'Malformed or mangled IFF file'

So I guess they have been changed in some way, after DP.

Oh well, thanks for all your help everybody!

Q;
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Old 17 January 2019, 22:41   #10
acd2001
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It's possible with a hex editor and cut&paste with a sane image.
I use Grafx2 to convert to various formats.
Attached Thumbnails
Click image for larger version

Name:	SAMURAI.PNG
Views:	56
Size:	5.9 KB
ID:	61627  
Attached Files
File Type: zip samurai-hack.zip (16.8 KB, 36 views)
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Old 18 January 2019, 15:07   #11
Qube
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Thanks acd2001, that works.

For those interested, I also found a small utility to display R/IFF file information called Riffpad, here - https://www.menasoft.com/blog/?p=34

Cheers!
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Old 18 January 2019, 15:38   #12
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It's like Report+ but without the chunk interpretation feature or IFF handling capability.
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