- keep babl palette formats around in the image in indexed mode
- create drawables with the right format
- as first test, convert indexed drawabled to rgb/gray by simply
calling gegl_buffer_convert()
which is the last bit of non-item drawing of stuff that is not
somehow the image itself... wheee!
This involves reverting commit
6bce0641d4 and adding back all the
vectors handlers that were in gimpdisplayshell-callbacks.c before.
Change the callbacks to manage proxy items for all the image's
vectors.
...just as we do for drawables. Connect to adding, removing, modifying
and toggling visibility of all vectors and emit "update-vectors"
accordingly. Add an update-vectors signal handler to GimpDisplayShell
and remove all other vectors handlers.
This commit is basically just an exchange of the stack-keeping
objects and one big replacement of e.g. private->layers by
private->layers->container. Useful code will follow :)
