[REBOL] Re: Default font for GUI text
From: henrikmk:gm:ail at: 9-Nov-2010 15:21
On Thu, Nov 4, 2010 at 6:09 AM, Duke Normandin <dukeofperl-ml1.net> wrote:
> The default GUI font used in REBOL 2.7.7 running on my Linux box seems
> to need anti-aliasing; and to be bigger (for me). Any way to configure
Why AA is not possible needs an explanation:
The REBOL 2 graphics engine is actually two engines: One that has
always been there and provides basic text, square shapes, some fixed
functions as well as a simple effects pipeline for false color,
contrast, tint, blur, etc, as well as event processing. This is the
engine used for the GUI (VID) and it cannot do anti-aliasing and is
rigid and limited. It will not be developed any more.
The other engine is the AGG, Anti-Grain Graphics engine, which
provides freeform drawing capabilities and can render complex shapes.
It's accessed by using it as an effect of the first engine, or by
using the DRAW function directly on an image. It provides fairly OK
anti-aliasing and many font effects. Unfortunately it does no
typography, so you can't center or adjust text easily. There are
hacks, but they are complex and slow.
REBOL 3 solves this by throwing out the first mentioned engine and
using an improved AGG for everything with more complete font rendering
possibilities, including rich text. Using a different underlying
general model for graphics (graphical object blocks, GOBs), it's also
This doesn't help you now, but REBOL 3 is where nearly all the energy
is put now, so it will be more interesting for you to use in a few
months, when the graphics version will be available under Linux.
Henrik Mikael Kristensen