Does anyone knows any library to open psd file, make simple edits (like color or placement change of certain layer) and render the image with the change without photoshop. I found many ways to open, list layers structure and render image, but cannot find editing library.
Best guess is that there should be programmatic way to do what I want with gimp, but maybe there is something more light weighted. p.s. preferable language is python but it is not very important.