Re: glib and Xlib

[Aron Rubin <aron rubin lmco com>]

jaafar EL GONNOUNI wrote:
> Hello;
>
> What is *glib *adding that the GTK + compared to *Xlib *?
>
> All what is possible with glib with Xlib is feasible, then why create a new
> library.

GLib in only on letter off from Xlib but the similarities end there. The 
C standards and POSIX do not specify data structures, and just a handful 
of algorithms. In order to write software that is more than simple 
linear logic one needs to employ fairly common data structures and 
algorithms. GLib provides those structures as well as abstractions other 
functionality which is only defacto standards in some systems but not 
others. GObject, which is bundled with and depends on GLib, provides a 
very complete explicit object orientation and signaling library.

XLib is pretty cool too. XLib is actually the client side of a rather 
well thought out graphics system. Almost all modern low-level graphics 
APIs have a server-client design even if they are running with shared 
memory. This maps well to semi-persistent graphics primitives and 
asynchronous control and rendering.

Gdk (bundled with Gtk+) abstracts XLib and Xt (X intrinsics) on systems 
where that is the primary graphics environment.

> Best regards.
>
>
>
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Aron Rubin                       Senior Member, Engineering Staff
Lockheed Martin                  E-Mail: arubin atl lmco com
Advanced Technology Laboratories Phone:  856.792.9865
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