XVisualInfo glXGetVisualFromFBConfig( Display *dp )

PARAMETERS
       dp  Specifies the connection to the X server.

       _param2
           Specifies the GLX frame buffer configuration.

DESCRIPTION
       If _param2 is a valid GLX frame buffer configuration and it has an asso‐
       ciated  X  Visual  then  information describing that visual is returned;
       otherwise NULL is returned. Use XFree to free the data returned.

NOTES
       glXGetVisualFromFBConfig is available only if the GLX version is 1.3  or
       greater.

       If  the  GLX  version is 1.1 or 1.0, the GL version must be 1.0.  If the
       GLX version is 1.2, then the GL version must be 1.1.  If the GLX version
       is 1.3, then the GL version must be 1.2.

       XVisualInfo is defined in Xutil.h.  It is a structure that includes vis‐
       ual, visualID, screen, and depth elements.

ERRORS
       Returns NULL if _param2 is not a valid GLXFBConfig.

SEE ALSO
       glXGetFBConfigAttrib, glXChooseFBConfig, glXChooseVisual, glXGetConfig

                                                   GLXGETVISUALFROMFBCONFIG(3G)