[George Peter Staplin] 2006.07.11 : As the Tcl/Tk core team is taking their time with Tk 8.5, I've been working on my own Tk9 for a few months.  It implements a window system using Tcl, and some C extensions from [megapkg] (megaimage, megaimagetk, structure).  It has full support for alpha transparency in '''any''' widget.  You can rotate windows, and every color in Tk9 consists of [list R G B A].

Features so far include (from megaimage):
   * antialiased line drawing using Wu's algorithm (full RGBA support).
   * rectangle drawing (full RGBA support)
   * rotation
   * scaling
   * arbitrary pixel put/get
   * getrow/putrow 
   * and much much more!  :)

At the moment it uses megaimagetk's megaimage.frame (in the demo) for fast shared memory image display.  Future performance will be even better.

I have a demo/prototype that you can drag around the windows in, and watch as the alpha transparency works flawlessly with the windows.

Here's an example of the Tk9 demo (prototype WIP):

[http://www.xmission.com/~georgeps/implementation/software/demo/tk9_demo.png]

Download the demo (for x86 Linux (built in Debian Sarge)):
http://www.xmission.com/~georgeps/implementation/software/demo/tk9_demo.kit

'''Design Plans for Tk9'''
http://www.xmission.com/~georgeps/documentation/plans/
 
'''Future Features''''
    * Freetype font rendering support (already in progress)
    * a new grid manager implemented in Tcl (already being designed)
    * port to a bare framebuffer and use it as an alternative to X11 (possibly via VESA support).
   
I'm open to new developers helping.  Are any of you interested in a mailing list?