gtk-osx-users

[Gtk-osx-users] Creating a gtk+osx gtkglext framework for use with OpenGL?

[Jack S. <da...@gm...>]

Hello :)

I'm new to this list, I just compiled an old Gtk+/Linux app of mine
using gtk+osx and Xcode, but I had to,
cheat using gtkglext and others from macports and I get a crash in
glXQueryExtension from gdk_gl_init from gtkglext.
Do I need to make a OS X framework for gtkglext using gtk+osx or is
there another way?
The point is NOT to use X right?
How do I get OpenGL when using gtk+osx?

Sincerely
Jacob

Re: [Gtk-osx-users] Creating a gtk+osx gtkglext framework for use with OpenGL?

[John R. <jr...@ce...>]

On Jun 20, 2009, at 11:06 AM, Jack Skellington wrote:

> Hello :)
>
> I'm new to this list, I just compiled an old Gtk+/Linux app of mine
> using gtk+osx and Xcode, but I had to,
> cheat using gtkglext and others from macports and I get a crash in
> glXQueryExtension from gdk_gl_init from gtkglext.
> Do I need to make a OS X framework for gtkglext using gtk+osx or is
> there another way?
> The point is NOT to use X right?
> How do I get OpenGL when using gtk+osx?
>
> Sincerely
> Jacob

I have no idea how to get OpenGL working for GTK-OSX, but I can assure  
you that using MacPorts is guaranteed to fail. Yes, the point of GTK- 
OSX is to not use X.

GtkGLExt is not part of Gnome or GTK, it's a separate library. The  
website is GtkGLExt.sourceforge.net. It's rather sparsely maintained  
from the look of the CVS repository. (It looks like it was taken over  
in March; there were a flurry of commits, and then nothing.) It may  
require some work to get it going with gtk-quartz... or even a modern  
cairo-based X11 GTK.

The GL solution that's part of Gnome -- and appears to be a bit more  
actively maintained -- is GtkGLArea, which you'll find in the usual  
Gnome places. You may be able to build that by hand with just a little  
fiddling to interface it to the OpenGL framework. I think that you'll  
want to avoid Mesa and the headers in /usr/X11/include/GL, because  
they'll pull in X11 dependencies, which may have unpredictable results.

Sorry that I can't be more help.

Regards,
John Ralls

Re: [Gtk-osx-users] Creating a gtk+osx gtkglext framework for use with OpenGL?

[Jack T. <ja...@ju...>]

On Jun 21, 2009, at 3:06 AM, John Ralls wrote:

>
> On Jun 20, 2009, at 11:06 AM, Jack Skellington wrote:
>
>> Hello :)
>>
>> I'm new to this list, I just compiled an old Gtk+/Linux app of mine
>> using gtk+osx and Xcode, but I had to,
>> cheat using gtkglext and others from macports and I get a crash in
>> glXQueryExtension from gdk_gl_init from gtkglext.
>> Do I need to make a OS X framework for gtkglext using gtk+osx or is
>> there another way?
>> The point is NOT to use X right?
>> How do I get OpenGL when using gtk+osx?
>>
>> Sincerely
>> Jacob
>
> I have no idea how to get OpenGL working for GTK-OSX, but I can assure
> you that using MacPorts is guaranteed to fail. Yes, the point of GTK-
> OSX is to not use X.
>
> GtkGLExt is not part of Gnome or GTK, it's a separate library. The
> website is GtkGLExt.sourceforge.net. It's rather sparsely maintained
> from the look of the CVS repository. (It looks like it was taken over
> in March; there were a flurry of commits, and then nothing.) It may
> require some work to get it going with gtk-quartz... or even a modern
> cairo-based X11 GTK.
>
> The GL solution that's part of Gnome -- and appears to be a bit more
> actively maintained -- is GtkGLArea, which you'll find in the usual
> Gnome places. You may be able to build that by hand with just a little
> fiddling to interface it to the OpenGL framework. I think that you'll
> want to avoid Mesa and the headers in /usr/X11/include/GL, because
> they'll pull in X11 dependencies, which may have unpredictable  
> results.

I've started a Xcode project for gtkglarea, but
the problem is I guess that GtkGLArea uses glx?
What functions do I need in gtk+osx and Cocoa/Carbon
to initialize an OpenGL view?

/Jacob

Re: [Gtk-osx-users] Creating a gtk+osx gtkglext framework for use with OpenGL?

[Jack S. <da...@gm...>]

On Sun, Jun 21, 2009 at 3:06 AM, John Ralls<jr...@ce...> wrote:
>
> On Jun 20, 2009, at 11:06 AM, Jack Skellington wrote:
>
>> Hello :)
>>
>> I'm new to this list, I just compiled an old Gtk+/Linux app of mine
>> using gtk+osx and Xcode, but I had to,
>> cheat using gtkglext and others from macports and I get a crash in
>> glXQueryExtension from gdk_gl_init from gtkglext.
>> Do I need to make a OS X framework for gtkglext using gtk+osx or is
>> there another way?
>> The point is NOT to use X right?
>> How do I get OpenGL when using gtk+osx?
>>
>> Sincerely
>> Jacob
>
> I have no idea how to get OpenGL working for GTK-OSX, but I can assure
> you that using MacPorts is guaranteed to fail. Yes, the point of GTK-
> OSX is to not use X.
>
> GtkGLExt is not part of Gnome or GTK, it's a separate library. The
> website is GtkGLExt.sourceforge.net. It's rather sparsely maintained
> from the look of the CVS repository. (It looks like it was taken over
> in March; there were a flurry of commits, and then nothing.) It may
> require some work to get it going with gtk-quartz... or even a modern
> cairo-based X11 GTK.
>
> The GL solution that's part of Gnome -- and appears to be a bit more
> actively maintained -- is GtkGLArea, which you'll find in the usual
> Gnome places. You may be able to build that by hand with just a little
> fiddling to interface it to the OpenGL framework. I think that you'll
> want to avoid Mesa and the headers in /usr/X11/include/GL, because
> they'll pull in X11 dependencies, which may have unpredictable results.
>

I've started a Xcode project for gtkglarea, but
the problem is I guess that GtkGLArea uses glx?
What functions do I need in gtk+osx and Cocoa/Carbon
to initialize and render an OpenGL view?

/Jacob

Re: [Gtk-osx-users] Creating a gtk+osx gtkglext framework for use with OpenGL?

[John R. <jr...@ce...>]

On Jun 21, 2009, at 3:15 AM, Jack Skellington wrote:

>
> I've started a Xcode project for gtkglarea, but
> the problem is I guess that GtkGLArea uses glx?
> What functions do I need in gtk+osx and Cocoa/Carbon
> to initialize and render an OpenGL view?
>
> /Jacob
>


Um, what GTK-OSX are you using? This list supports GTK+-2.0, for which  
GTK-OSX is mostly a build system with some Mac integration functions,  
which you would use for your application, not for a library.

If GtkGlArea is using GLX, you'll have to patch their code to use OSX  
GL glue instead. Sorry, I've no idea what that would be; I've had only  
passing contact with OpenGL as a part of a wxWidgets project I  
inherited. I suggest searching on OpenGL at http:// 
developer.apple.com/. You should probably get in touch with the  
GtkGLArea devs as well.

You're probably better off sticking with straight autotools for  
GtkGLArea work; it will integrate into the mother project better if  
they accept your patches, and once you have it working I can add it to  
GTK-OSX for automatic building and inclusion in the frameworks. Then  
you can use XCode to build your application if you want to.

Regards,
John Ralls