Re: RES: RES: RES: [Mesa3d-users] Linking problem

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

arivanbastos wrote:
> Thank you for help.
>=20
> I'm trying to recover context information, but I'm getting "Segmentatio=
n
> Fault (SDL Parachute Deployed)". My code to init the window and recover
> context info is like that:
>=20
> 	if( SDL_Init(SDL_INIT_VIDEO) < 0 ){ ... // error }
>=20
> 	atexit( SDL_Quit );
>=20
> 	info =3D SDL_GetVideoInfo();
> 	if(!info){	... // error  }
>=20
> 	width =3D 640; height =3D 480;
> 	bpp =3D info->vfmt->BitsPerPixel;
> 	SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);=09
> 	...
> 	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
> 	SDL_Surface* window =3D  SDL_SetVideoMode(width, height, bpp,=20
> =09
> SDL_OPENGL);
> 	// recover the context info=20
>    	SDL_SysWMinfo* sysWNinfo;
>      	HDC hdc;     HGLRC hrc;
>     =20
> 	hdc =3D NULL;  hrc =3D NULL;  sysWNinfo =3D NULL; =20
> =09
> 	// Segmentation fault pparently is caused by the row above =20
>       if ( !SDL_GetWMInfo(sysWNinfo) ) { ... //error }
>=20
> 	hdc =3D GetDC(sysWNinfo->window);
>      	hrc =3D wglCreateContext(hdc);            =20
>     =20
> 	if ( wglMakeCurrent(hdc, hrc) )  	{
>          // can try to recover ARB functions pointers
>       } else { ... // error  }
>      =09
> Am I doing a stupid thing? I tried to use
> wglMakeCurrent(wglGetCurrentContext(), wglGetCurrentDC()) but I get a
> error code n=B06 (ERROR_INVALID_HANDLE) in wglMakeCurrent().

Perhaps wglGetCurrentContext() or wglGetCurrentDC() is returning an=20
invalid value.  Have you looked over the Mesa wgl code for those=20
functions?

-Brian