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Author
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Topic: PAK logos
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Malte
Member Posts: 282
From:Germany
Registered: Apr 2002
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posted 06-08-2002 08:06 AM
   
Hi
Are the logos (PAK files) compressed with ZLIB? I tried some compression levels of ZLIB (4-9, the others cause the program to crash, I don't know why) but the size of the PAK file wont be the same as the PAK file compressed with packer.exe.I really need this for BmpToRaw 3. ------------------
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TRWad
Member Posts: 453
From:Rotterdam
Registered: Dec 2001
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posted 06-08-2002 09:31 AM
yes, they are compressed. I don't know the level. Try asking turbo pascal. He uses compression in treditor. I guess the tr5 compression has the same level.IP: Logged |
aktrekker
Member Posts: 1127
From:WA, USA
Registered: Apr 2001
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posted 06-08-2002 11:04 AM
The compression is probably the same as for TR4 files. They use deflate to compress and use the default compression level.
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Malte
Member Posts: 282
From:Germany
Registered: Apr 2002
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posted 06-08-2002 11:18 AM
I used the function compress2() to compress the data of the RAW file. I tried level 4 but the size of the compressed data is too big. I could not use lower levels. The program crashes when I call compress2() with a lower level than 4. What's wrong?IP: Logged |
TRWad
Member Posts: 453
From:Rotterdam
Registered: Dec 2001
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posted 06-08-2002 11:27 AM
Maybe you should try using the compress function, but I don't try. Ask turbo or popov if it failsIP: Logged |
Malte
Member Posts: 282
From:Germany
Registered: Apr 2002
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posted 06-08-2002 12:21 PM
I made a mistake in the code. If you now use the normal compress() function (level 6 I think) the size of a PAK file will be as big as if you compressed the RAW with packer.exe (the same RAW of course). The size of the PAK files are exactly the same. 
The game crashes when it starts with a PAK logo compressed with ZLIB. And I can't uncompress PAKs created by packer.exe with uncompress() (for the PAKViewer of the next version of BmpToRaw). IP: Logged |
Malte
Member Posts: 282
From:Germany
Registered: Apr 2002
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posted 06-10-2002 12:21 PM
No, wrong: A PAK file created by packer.exe is always 4 bytes bigger. But the problem is not only the different size. Many bytes of a PAK file created by packer.exe and with ZLIB (compress()) are different.IP: Logged |
aktrekker
Member Posts: 1127
From:WA, USA
Registered: Apr 2001
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posted 06-11-2002 02:14 AM
I took a look at the PAK file on my machine. I followed a little bit of the code in zlib and it appeared that the file is a valid zlib file, but I didn't follow very far.
The first 4 bytes are a DWORD containing the uncompressed size of the data. If you handle that right, you *should* be able to uncompress the file. Compressing it exactly the same might be a problem.
I suppose I could do a quicky test program and see if I can uncompress it without any errors. If it is important to anyone.
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Malte
Member Posts: 282
From:Germany
Registered: Apr 2002
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posted 06-11-2002 05:15 AM
Thank you. The DWORD value has to be 512*256*3, hasn't it (because the size of an uncompressed logo RAW is always 512*256*3)?I really need this for BmpToRaw 3. Then version 3 (last version) would be ready! IP: Logged |
Malte
Member Posts: 282
From:Germany
Registered: Apr 2002
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posted 06-11-2002 05:27 AM
 YOU ARE GREAT, AKTREKKER The DWORD value was the only bug. Now it works perfectly. ZLIB, standard compression. Thank you very much!!! IP: Logged |
TheMask
Member Posts: 409
From:the Coco Bongo Club Registered: Dec 2000 Registered: Dec 2001
Registered: May 2002
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posted 06-11-2002 06:11 AM
Does that mean the third version is ready ?  IP: Logged |
Malte
Member Posts: 282
From:Germany
Registered: Apr 2002
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posted 06-11-2002 07:07 AM
Yes, but it is not already uploaded, but it will be uploaded soon!IP: Logged |
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