glXQueryContextInfoEXT(3G)

NAME
     glXQueryContextInfoEXT - returns information about a GLX rendering
     context


C SPECIFICATION
     int glXQueryContextInfoEXT( Display *dpy,
                                 GLXContext ctx,
                                 int attribute,
                                 int *value )


PARAMETERS
     dpy        Specifies the connection to the X server.

     ctx        Specifies a GLX rendering context.

     attribute  Specifies the context attribute to be returned.

     value      Returns the requested value.


DESCRIPTION
     glXQueryContextInfoEXT returns in value the value of attribute for ctx;
     it may cause a round trip to the server.

     attribute is one of the following:

     GLX_SHARE_CONTEXT_EXT XID of the share list context that was specified
                           when ctx was created by calling glXCreateContext or
                           NULL if ctx is not part of a share list.

     GLX_VISUAL_ID_EXT     Visual i.d. for XVisualInfo structure that is
                           associated with ctx.

     GLX_SCREEN_EXT        Screen number for ctx.

     GLX_FBCONFIG_ID_SGIX  XID of GLXFBConfigSGIX that is associated with ctx.

     glXQueryContextInfoEXT returns an error code if it fails for any reason;
     otherwise, zero is returned.


NOTES
     glXQueryContextInfoEXT is part of the EXT_import_context extension.

     GLX_FBCONFIG_ID_SGIX is not a valid attribute unless the SGIX_fbconfig
     extension is supported.
ERRORS
     glXQueryContextInfoEXT returns GLX_BAD_ATTRIBUTE if attribute is invalid.

     A GLXBadContext error is generated if ctx is not a valid rendering
     context.



SEE ALSO
     glXCreateContext