Support PSD (Photoshop) files

[ghost]

It would be extremely beneficial if this program could in the future open and manipulate and save/export to PSD files. It would make transition from photoshop to cascade easier.

[ghost]

@ttddee
If it helps, adobe has published specs on the photoshop file format for third parties to read and write PSD files.

https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/
also found this: https://github.com/MolecularMatters/psd_sdk

Reply back if you have any questions.

[ttddee]

Thanks!

So the plan here would be to first check how complete or not the support for PSD in OpenImageIO is.

If that is not sufficient, then check the library above.

I also think reading PSD is much more important than writing. Writing PSDs from Cascade doesn't make that much sense because we don't have smart objects, adjustment layers etc. If the user wants to go back to Photoshop, they could just write a multi-channel EXR or TIF.

[ghost]

@ttddee
I truly think adjustment layers because of how convenient they are should be implemented.

[ttddee]

Cascade doesn't have the concept of layers. You can do everything an adjustment layer can do (and more) with a node.

IMO adjustment layers are pretty limited in their functionality, as they only allow certain types of filters to be applied.