Status of openGL support in GtkAda.

Status of openGL support in GtkAda.

[Rod Kay]

Hello.all,

    Has anyone had any success using openGL in GtkAda ?

    I tried a quick test today and although the 'Gtk.GLArea' and 
'Gdk.GLContext' packages are present, I was unable to get a GL context.

    Also, the testgtk program has no openGL demo, as it used to have.

    I used openGL/GtkAda to good effect many years ago. Has openGL 
support then been dropped completely ?

    I recall there was a Gtk3 bug related to openGL and thought that 
might possibly be the reason why it is absent in GtkAda. Does GtkAda use 
Gtk4, yet ?

    I'm quite keen to try my hand at game programming (and have 
developed an Ada game engine library), so any advice/info would be 
greatly appreciated.


Regards.

Re: Status of openGL support in GtkAda.

[Vadim Godunko]

On Thursday, September 21, 2023 at 12:37:02 PM UTC+4, Rod Kay wrote:
> 
> Has anyone had any success using openGL in GtkAda ? 
> 
> I tried a quick test today and although the 'Gtk.GLArea' and 
> 'Gdk.GLContext' packages are present, I was unable to get a GL context. 
> 
> Also, the testgtk program has no openGL demo, as it used to have. 
> 
> I used openGL/GtkAda to good effect many years ago. Has openGL 
> support then been dropped completely ? 
> 
> I recall there was a Gtk3 bug related to openGL and thought that 
> might possibly be the reason why it is absent in GtkAda. Does GtkAda use 
> Gtk4, yet ? 
> 
> I'm quite keen to try my hand at game programming (and have 
> developed an Ada game engine library), so any advice/info would be 
> greatly appreciated. 
> 
Rod,

GtkAda is binding for Gtk+ 3.24.x version, it doesn't support Gtk 4.

GtkAda doesn't provide OpenGL API binding, but supports OpenGL. There is no example in testgtk for this reason - it requires OpenGL API binding.

Re: Status of openGL support in GtkAda.

[Rod Kay]

On 2/10/23 19:44, Vadim Godunko wrote:
>>
> 
> GtkAda is binding for Gtk+ 3.24.x version, it doesn't support Gtk 4.
> 
> GtkAda doesn't provide OpenGL API binding, but supports OpenGL. There is no example in testgtk for this reason - it requires OpenGL API binding.


    I'm very happy to report that openGL support in gtkada works fine. I 
made a simple blunder in my initial test (not attaching the gl_Area 
widget to my main window widget *sigh* :) ).

    It is also possible to use an openGL engine (ie a renderer in it's 
own ada task) with gtakada. A simple protected object to prevent mutual 
access between the gtkada task (main environment task) and the openGL 
engine task, is all that was required.

    *Thank* you Vadim for letting me know that the openGL support is there.

    Now, onto my game ! ... :D

    "The game is afoot!"


Regards.


P.S.   Would anyone know if gtkada might be 'upgraded' to support gtk4 ?
        Just curious (gtk3 is fine for my purposes).

Re: Status of openGL support in GtkAda.

[Rod Kay]

On 2/10/23 19:44, Vadim Godunko wrote:
>>
> 
> GtkAda is binding for Gtk+ 3.24.x version, it doesn't support Gtk 4.
> 
> GtkAda doesn't provide OpenGL API binding, but supports OpenGL. There is no example in testgtk for this reason - it requires OpenGL API binding.


    I'm very happy to report that openGL support in gtkada works fine. I 
made a simple blunder in my initial test (not attaching the gl_Area 
widget to my main window widget *sigh* :) ).

    It is also possible to use an openGL engine (ie a renderer in it's 
own ada task) with gtakada. A simple protected object to prevent mutual 
access between the gtkada task (main environment task) and the openGL 
engine task, is all that was required.

    *Thank* you Vadim for letting me know that the openGL support is there.

    Now, onto my game ! ... :D

    "The game is afoot!"


Regards.


P.S.   Would anyone know if gtkada might be 'upgraded' to support gtk4 ?
        Just curious (gtk3 is fine for my purposes).

Re: Status of openGL support in GtkAda.

[Rod Kay]

On 2/10/23 19:44, Vadim Godunko wrote:
 >>
 >
 > GtkAda is binding for Gtk+ 3.24.x version, it doesn't support Gtk 4.
 >
 > GtkAda doesn't provide OpenGL API binding, but supports OpenGL. There 
is no example in testgtk for this reason - it requires OpenGL API binding.


    I'm very happy to report that openGL support in gtkada works fine. I 
made a simple blunder in my initial test (not attaching the gl_Area 
widget to my main window widget *sigh* :) ).

    It is also possible to use an openGL engine (ie a renderer in it's 
own ada task) with gtakada. A simple protected object to prevent mutual 
access between the gtkada task (main environment task) and the openGL 
engine task, is all that was required.

    *Thank* you Vadim for letting me know that the openGL support is there.

    Now, onto my game ! ... :D

    "The game is afoot!"



Regards.


P.S.   Would anyone know if gtkada might be 'upgraded' to support gtk4 ?
        Just curious (gtk3 is fine for my purposes).

Re: Status of openGL support in GtkAda.

[Rod Kay]

On 2/10/23 19:44, Vadim Godunko wrote:
 >>
 >
 > GtkAda is binding for Gtk+ 3.24.x version, it doesn't support Gtk 4.
 >
 > GtkAda doesn't provide OpenGL API binding, but supports OpenGL. There 
is no example in testgtk for this reason - it requires OpenGL API binding.


    I'm very happy to report that openGL support in gtkada works fine. I 
made a simple blunder in my initial test (not attaching the gl_Area 
widget to my main window widget *sigh* :) ).

    It is also possible to use an openGL engine (ie a renderer in it's 
own ada task) with gtkada. A simple protected object to prevent mutual 
access between the gtkada task (main environment task) and the openGL 
engine task, is all that was required.

    *Thank* you Vadim for letting me know that the openGL support is there.

    Now, onto my game ! ... :D

    "The game is afoot!"



Regards.


P.S.   Would anyone know if gtkada might be 'upgraded' to support gtk4 ?
        Just curious (gtk3 is fine for my purposes).

Re: Status of openGL support in GtkAda.

[Rod Kay]

    Ugh ... sorry about the multiples.

    My reply stalled when sending, so I tried re-sending ... several 
times :/.