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by kmike84 4707 days ago
Unfortunately I'm currently very busy with other projects, so I probably won't implement PSD.rb features myself anytime soon.

I'm trying to provide feedback for psd-tools pull requests, merge them and release new psd-tools versions in timely manner; the testing suite also helps here, so you know, pull requests are welcome :) Most improvements over last 6 months came from pull requests submitted by other great people.

I think that the "reader" part of library is feature-complete. psd-tools reads all the information, but it doesn't decode all Photoshop data structures (some of them are available only as binary blobs). So I think implementing a PSD.rb feature will most likely involve checking PSD.rb code and decoding a binary blob (already loaded to memory) to a Python data structure.
1 comments
tluyben2 4707 days ago
I didn't check your codebase (I just used the library for a few projects a while ago), so you don't have to answer. But if you want to enlighten others as well as me; am I right in thinking that you have a reader while reads the file and then have a 'decoding module' for every blob. So it would be rather straight forward to port from Ruby such a decoding part and plug it into your library?
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kmike84 4707 days ago
Yes, that was the idea.

The whole process is divided into 3 stages: reading, decoding and providing "user-facing API":

- on "reading" stage PSD file is read and split into binary blobs (I think this part is done);

- on "decoding" stage "decoding modules" are called for each binary blob; decoding modules should produce Python data structures that closely resembles internal PSD format;

- on "user API" stage decoded data is converted to more convenient format that is easier to work with (e.g. this include building layers hierarchy, and the PSDImage/Layer/etc classes).

I hope that providing new decoders will be rather straightforward, and it seems to work this way so far: contributors haven't touched "reader" part, and I haven't touched it for a while as well. But software development is hard, so we can never be sure :)

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