Re: Re[18]: OpenGL Linux SIGTRAP wxWidgets-3.2*

On Fri, Mar 17, 2023 at 5:50 PM Vadim Zeitlin <[email protected]> wrote:

> On Fri, 17 Mar 2023 17:00:57 +0100 Dan Gudmundsson wrote:
>
> DG> The amount to set a vm where I can build wxwidgets/erlang/wings is not
> that
> DG> small.
>
>  You don't need to compile in this VM...
>

True


>
> DG> I'm so lost here, I believe I will have to use the workaround..
>
>  AFAICS we really pass an invalid surface to eglSwapBuffers(), I see no
> other explanation. I.e. we need to set things up to recreate it before it's
> called again after reparenting.
>
>  A perhaps simpler way to do this than what I had proposed before would be
> to add a new X/GTK-specific event generated when the window is realized and
> to bind to it on the parent windows recursively in wxGLCanvasEGL and
> recreate the surface in the handler.
>
>
I don't know if that will work, do we get a realized event if we don't
create windows just delete and reparent,
i..e in the case a splitterwindow is deleted further up in the tree?

Maybe just do what I wanted in the first place, document CreateSurface()
for EGL only,
and add a eglDestroySurface() if the surface already exists, so the user
can have control.

I don't think just re-creating the surface will work since the wxGLContext
is dependent on it, so after the surface
is created, the user will still need to create a wxGLContext and activate
it with SetCurrent() and the users OpenGL
state needs to be re-initialized as well because that is lost.

So even if re-creating the surface in wxWidgets is automagic, the
EGL/OpenGL user still needs to act upon it afterwards.

That is a lot of new code in wxWidgets just to handle a corner case (or
maybe MESA bug) for something that
the user still needs to handle.

Regards
/Dan


>  Regards,
> VZ
>
> --
> TT-Solutions: wxWidgets consultancy and technical support
>                http://www.tt-solutions.com/
>

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