This was originally my lame attempt to try and figure out the RLZ compression method, but, since I somewhat suck at Assembler, and there's too much code for my level, I gave up :P


Anyways, this is a simple patch which should remove the dimension restrictions in Sony's Theme Creator.
Note that I have not tested if this works fully (too lazy to upgrade to 3.70+ >_>)

Alright, here's what to do:
Open up themeconv.exe in a hex editor.
Go to 0x816D, the 2 byte value there should be 0x097F - change this to 0x0BEB.
Next, go to 0x8181, and change the 2 byte value from 0x0A7F to 0x0CEB.

Save the file, and now run the EXE.  You should be able to add icons/pictures regardless of their dimension.
It appears to generate PTFs fine, but, as said previously, I haven't tested this, so can't guarantee it will work.

Please tell me if you try this, and tell me if it works!  Thanks :D

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Oh, and if anyone's interested in trying to figure out the RLZ compression thingy, I believe the function is at 0x406070 (0x6070 in file), and has the following definition:

Where output is the output buffer to send the data to, inputlen is the length of the input buffer, input is the actual input buffer.
mode is an interesting switch - the theme creator will actually compress the data 3 times - with modes 5, 6 and 7.  It then determines which mode gives the highest efficiency, and calls this function again with the respective mode.
I think the mode can be seen in the first byte of the compressed data.
The mode appears to be AND'd with 7 in the code,  so a mode above 7 will just be reduced mod 7.  Not sure what's wrong with modes 0-4 though.

(This post was last modified: 10/02/2008 03:33 AM by ZiNgA BuRgA.)