Bug for import image

[masagrator]

When converting to CZ3, tool is using compressed size from source as some kind of limitation of how big 1 compressed image can be, which is not always correct. For Summer Pockets max size per each layer is 0xFEFD, and for some reason images converted by this tool with more than 1 layer are rendered as garbage by game except for first layer.

[masagrator]

Next issue - importing CZ1 is broken.
it doesn't output full header. After fixing header image is broken when converting it back to PNG.
example
of original file, just convert it to PNG and convert it back.
RB_TABLE_TENNIS_PAUSE.zip

If i see correctly, some informations are written as big endian instead of little endian, in indexes RGB (transparency is fine) is written too in wrong order.

[masagrator]

Fixed the issue with CZ3 layers.

If there is more than one layer, uncompressed size of first layer is 1 byte too high, and of last layer 1 byte too low.

After fixing this all images are rendered correctly in Summer Pockets.
Using this simple Python script that is getting file path as first argument

import sys

file = open(sys.argv[1], "rb+")
if (file.read(4) != b"CZ3\x00"):
    print("Wrong FILE!")
    sys.exit()

header_size = int.from_bytes(file.read(4), byteorder="little")
file.seek(header_size-8, 1)
layer_count = int.from_bytes(file.read(4), byteorder="little")
if (layer_count == 1):
    print("File doesn't need correction!")
    sys.exit()
next_pointer = file.tell() + (8 * (layer_count-1))

file.seek(4, 1)
unc_size1 = int.from_bytes(file.read(4), byteorder="little", signed=False)
file.seek(-4, 1)
unc_size1 -= 1
file.write(unc_size1.to_bytes(4, "little", signed=False))

file.seek(next_pointer)
file.seek(4, 1)
unc_size2 = int.from_bytes(file.read(4), byteorder="little", signed=False)
file.seek(-4, 1)
unc_size2 += 1
file.write(unc_size2.to_bytes(4, "little", signed=False))

file.close()

[yoremi-trad-fr]

I published a version with this bug fixed for CZ3, I tested it with AIR Steam.
https://github.com/yoremi-trad-fr/LuckSystem-2.3.2-Yoremi-Update/tree/main

[wetor]

It looks really good! Are you interested in becoming a collaborator for this repository? You will have full code management permissions. Recently, I haven't had much time to maintain these repositories, so I am actively looking for maintainers. Of course, you can also maintain your fork repository exclusively

[yoremi-trad-fr]

Hello,
That's very kind of you, but I'm not a developer (it may seem absurd to you, but I have no knowledge of development).
I used Claude AI to find and investigate bugs.
I'm a visual novel translator, and it turns out that for my AIR Steam version translation project, I encountered problems when using LuckSystem. So I did my best with Claude Opus 4.5.
You can add me as a collaborator if you want, I don't mind.

Yoremi

[yoremi-trad-fr]

Thanks for the invitation. I'm currently looking into implementing CZ4 in Lucksystem.
When I unpack my CG .PAK files, I have some CZ4 files that aren't supported.
I'll keep you posted.

[yoremi-trad-fr]

Next issue - importing CZ1 is broken. it doesn't output full header. After fixing header image is broken when converting it back to PNG. example of original file, just convert it to PNG and convert it back. RB_TABLE_TENNIS_PAUSE.zip

If i see correctly, some informations are written as big endian instead of little endian, in indexes RGB (transparency is fine) is written too in wrong order.

I also encountered a bug when exporting/importing CZ1, I fixed it, it works on AIR: https://github.com/yoremi-trad-fr/LuckSystem-2.3.2-Yoremi-Update/blob/main/Yoremi%20V3-TECHNICAL.md

I should test it on LB.