Re: [Mesa3d-users] glXQueryExtension() is failing

[Brian P. <bri...@tu...>]

Rajavaram Priya wrote:
>   
> Hi
> I downloaded mesa from the site and installed it on Solaris 5.9.
> We built it for 32-bit V8 nothreads configuration.
> When we try to run a Qt example which uses Opengl it throws the following error to me:
> "This system has no opengl support. Exiting."
> 
> We have compiled Qt with the default option for openGl support which is :
> -no-dlopen-opengl (QT Links against openGL libraries direclty).
> 
> We have tried to diagnose the problem :
> we have found that the function : glXQueryExtension() is failing.
> 
> Please tell us how to rectify this problem. 

The implementation of glXQueryExtension() is in 
src/mesa/drivers/x11/fakeglx.c:

static Bool
Fake_glXQueryExtension( Display *dpy, int *errorb, int *event )
{
    /* Mesa's GLX isn't really an X extension but we try to act like 
one. */
    (void) dpy;
    (void) errorb;
    (void) event;
    return True;
}

Perhaps the errorb and event values need to return some real values.
Maybe try this:

static Bool
Fake_glXQueryExtension( Display *dpy, int *errorb, int *event )
{
    /* Mesa's GLX isn't really an X extension but we try to act like 
one. */
    (void) dpy;
    *errorb = 1;
    *event = 1;
    return True;
}


-Brian