Re: question to backend/gui guru...

[Adam Fedor]

As long as you don't call [NSApplication sharedApplication] (or, in 
fact, initialize NSApplication at all), you can use classes in the gui 
without a backend.  But you have to be careful not to use any 
classes/methods that cause any display or drawing.  Also you could 
create a dummy backend (something like gsc in gnustep-back). That does 
nothing or does what you want it (see documentation for GSDisplayServer 
and NSGraphicsContext).


On Sep 10, 2006, at 2:09 PM, address@hidden wrote:

> Gregory,
>
> Thanks for your answer.
>
> I dont want to make a 'gnustep application', but an 'application
> using gnustep' ;-)
> Actually i want to make a tiny 3D game in objective C. You may see
> that as a training (for me) and a test of the efficiency of
> objective c for that kind of application. SDL is imho a good choice
> for a game, and gnustep is a good choice for objective C.
>
> Basically i need a simple cross-platform multimedia library, with
> _joystick_support_, fullscreen display, custom resolution... Gnustep
> cant do that, but can do many other useful things. And I'd like to
> write some code that might be run/resuse later on a full gnustep
> system, and then i have to write some NS-compatible classes.
> In brief I need something like a NSApplication class that does not
> need any NSWindow object. I could (try to) write it from scratch,
> but i'd prefer reuse gnustep classes if i can : they are better than
> anything i could make...
>
> TIA
>
> Xavier
>
> Selon Gregory John Casamento <address@hidden>:
>
> > Xavier,
> >
> > You've given little information about what you're actually trying to 
> > do.
> > Your email details how you would like to solve the issue, but doesn't 
> > clearly
> > define what the issue is.
> >
> > Based on the fact that you briefly mention OpenGL, I assume you
>  want to make
> > a GNUstep application which displays OpenGL graphics.  GNUstep has an
> > implementation of NSOpenGLView which allows OpenGL to be directly 
> > displayed
> > in the view.   GNUstep does this by creating an OpenGL window and 
> > reparenting
> > it to the view, thus not incurring any overhead.
> >
> > Is there some issue with using this?
> >
> > Later, GJC
> >
> > --Gregory Casamento
> >
> > ----- Original Message ----
> > From: address@hidden
> > To: address@hidden
> > Sent: Sunday, September 10, 2006 11:59:00 AM
> > Subject: question to backend/gui guru...
> >
> >
> > Hello
> >
> > I intend to write a SDL+OpenGL application based on gnustep.
> >
> > I can use gnustep-base without problem, but i'd like to use some 
> > parts of
> > gnustep-gui (event management, ...) without any graphic or window
> > class/function.
> >
> > SDL dont provides any graphic function, and I dont want to write à 
> > full
> > SDL+OpenGL backend !!
> > I dont want to rewrite gnustep in any way. I only want to compile the 
> > classes
> > i
> > need in gnustep-gui. But I understand I would have to write a partial
> > backend,
> > a "SDL-server", like "win32" or "X11" ones (i hope i can do that...)
> >
> > I wonder if it would be easy (or at least feasible) to split/compile
> > gnustep-back and gnustep-gui in two parts : "server" and "system" on 
> > one
> > side,
> > and "graphics" and "gui" on the other side.
> > (and then use only (SDL-)server/system)
> > Any informations about dependances between classes will be welcome ! 
> > Its
> > quite
> > obscur for me... :o\
> >
> > In brief : feasible or not ?  thnks in advance !
> >
> > Xavier
>
>
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