Re: [GtkGLExt] Initial port of GtkGLExt to GTK+ 3

["Alois Z." <alois zoitl gmx at>]

Hi,

I tried it on my Debian (testing) machine. Compiling first stopped as it could not link the simple_mixed example as it could not find cairo_set_source_rgb. Is this a Debian or libraries version issue?
I removed this example from the makefiles and it worked perfectly.

My next test was to build gtkmm against it as I would need this for my application that I like to port to gtk3 (exactly gtkmm 3). However I was to dumb to get the basic build system up and running after I changed it to check for gtkglext 3. The git version is complaining that it needs old versions of libtool and automake.

I'll hope I find some time during this week.

Best Regards,
Alois


-------- Original-Nachricht --------
> Datum: Sun, 08 Jan 2012 17:28:45 +0100
> Von: Thomas Zimmermann <zaukental googlemail com>
> An: gtkglext-list gnome org
> CC: Victor henri <nadaeck hotmail com>, Mike Paul <mike wyzardry net>
> Betreff: [GtkGLExt] Initial port of GtkGLExt to GTK+ 3

> Hi
> 
> I did a quick port of GtkGLExt to GTK+ 3 over the weekend. You can get a
> copy of my repository by running
> 
>   git clone git://github.com/tdz/gtkglext.git
> 
> The code builds cleanly on Fedora 15.
> 
> On-screen windows should work. At the moment only the X11 backend is
> supported though. Since GdkDrawable is gone, GdkGLWindow is not drawable
> anymore, but this should not be a problem. Actually this change brings
> GdkGLExt closer to GLX. You can, of course, still get a GdkGLWindow's
> GdkWindow and draw to it.
> 
> Off-screen rendering does currently not work. In GDK 3, off-screen
> rendering is implemented by windows of type GDK_WINDOW_TYPE_OFFSCREEN.
> Future off-screen rendering has to be build on top of this window type.
> 
> Color-index rendering is gone. GDK 3 lacks the necessary interfaces to
> manipulate a window's colormap, so a direct port of this feature is not
> possible. On the other hand, color-index rendering has been removed from
> OpenGL 3, so the removal of this feature is probably not a big loss.
> Color-index rendering can be implemented by fragment shaders.
> 
> The build system now creates a single library that can contain multiple
> rendering targets. This is a feature of GDK 3 and I think, GdkGLExt
> should behave similar. Only the build system has been changed by now.
> The actual source code still does not support it.
> 
> Most of the demos work. I removed those demos that relied on features
> that are not supported by the port.
> 
> I also have some ideas for further development of the code. The X11
> target should be rewritten for GLX 1.4. This would allow for new
> features and probably make the code base cleaner. Adding off-screen
> rendering afterwards should be simple. Pbuffer support would also be
> possible.
> 
> The other window systems should be supported again. I don't have a
> Macintosh, so someone else needs to do that.
> 
> There are tons of auto-generated look-up functions for OpenGL
> extensions. Those should be replaced by a single generic function.
> 
> Once the most important tasks have been done, I'd would like to get the
> code upstream and make a release. All contributions are welcome!
> 
> Best regards
> Thomas
> 
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