saire

saire ( Sai Reversed Engineered ) is lib that helps to decrypt the file contents of a .sai file for the SYSTEMAX PaintTool Sai drawing software.

Acknowledgement

This repository would not have been possible without the research of Wunkolo, the creator of libsai; basically this library, but on cpp. As of now, the only really differences between the 2 projects is that saire can read Layer data, but it is still pretty limited.

API Design

For the moment, only a single struct ( Sai ) provides access to get information about a sai file. I will probably provide access to the low level APIs, but for now I want to clean up the code before doing so.

I might create a bin crate later on, but right now it would not be that useful.

Limitations

This is a list of things that saire can't still properly do:

• Decompress layer mask data.
• Export to PNG and PSD.
• Some obscure option that I never used...

I'm currently working on understanding how masks work; Then, I want at least do a sai to png exporter.

I don't have plans for the moment to do a sai to psd exporter, because that will be too time consuming, but maybe I get the motivation to do it some day.

Of course, there might be some obscure option in the sai file format, that might break the library. If you have problems reading a file, please open an issue, I have tested a couple of files ranging from different dates ( 2014-2019 ), and I was able to get at least Layer data ( didn't test other information ), so in my end everything seems fine for now.

File Format Specification

If you want a deep dive on how the actually file format works, I will recommend reading Wunkolo's document. If you still have any doubts you can read saire source code or open an issue here.