1.6.2 What is its current state of development?

GNU contracted with Aladdin Enterprises to add some key features to GNU Ghostscript so it could be used as a DPS server. This work has mostly been done, although Aladdin did not completely finish the work that they were contracted for. (Because the work took longer than specified and was not completed, Aladdin agreed to waive approximately $10,000 in promised fees for the work that was actually done and delivered.) DGS works fairly well with a single context. Alpha channel and compositing doesn’t work.

Currently, further development on DGS has been abandoned. The library based approach using libart, cairo, etc works much better.