World: r3wp

How it's with AGG and R3? Current REBOL version is using AGG version 
2.3, which has copyright message:

Anti-Grain Geometry - Version 2.3 
Copyright (C) 2002-2005 Maxim Shemanarev (McSeem) 


Permission to copy, use, modify, sell and distribute this software 
is granted provided this copyright notice appears in all copies. 
This software is provided "as is" without express or implied

warranty, and with no claim as to its suitability for any purpose.


The AGG version 2.4, which is basicaly same as version 2.5 has copyright:
Anti-Grain Geometry has dual licensing model. The Modified BSD 
License was first added in version v2.4 just for convenience.
It is a simple, permissive non-copyleft free software license, 
compatible with the GNU GPL. It's well proven and recognizable.
See http://www.fsf.org/licensing/licenses/index_html#ModifiedBSD
for details.

Note that the Modified BSD license DOES NOT restrict your rights 
if you choose the Anti-Grain Geometry Public License.

Can we update the REBOL's Agg sources to the 2.4 version to be used 
with open sourced host-kit?

I got 'yes' from the AGG author to be able use v2.4 but there is 
not much significant changes in 2.3 vs 2.4 except internal code cleanup 
and few new custom rasterizers so the priority for going to 2.4 was 
never high enough to spend time on it.

The AGG in R3 uses some code from 2.4 as it was much easier to add 
it this way than merge all the custom changes to 2.4 and then do 
all the testing to see if something went wrong.


Ofcourse any effeort to make the proper transition from the current 
2.3 based code to v2.4 is welcome.

Is there any graphics related test framework?

AFAIK There is no real test framework for R3. Only the DRAW and SHAPE 
tests included in host-kit.