glxqueryextension(3g) [centos man page]

GLXQUERYEXTENSION(3G)						   OpenGL Manual					     GLXQUERYEXTENSION(3G)

NAME

       glXQueryExtension - indicate whether the GLX extension is supported

C SPECIFICATION

       Bool glXQueryExtension(Display * dpy, int * errorBase, int * eventBase);

PARAMETERS

       dpy
	   Specifies the connection to the X server.

       errorBase
	   Returns the base error code of the GLX server extension.

       eventBase
	   Returns the base event code of the GLX server extension.

DESCRIPTION

       glXQueryExtension returns True if the X server of connection dpy supports the GLX extension, False otherwise. If True is returned, then
       errorBase and eventBase return the error base and event base of the GLX extension. These values should be added to the constant error and
       event values to determine the actual event or error values. Otherwise, errorBase and eventBase are unchanged.

       errorBase and eventBase do not return values if they are specified as NULL.

SEE ALSO

       glXQueryVersion()

COPYRIGHT

       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see
       http://oss.sgi.com/projects/FreeB/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014						     GLXQUERYEXTENSION(3G)

GLXQUERYCONTEXT(3G)						   OpenGL Manual					       GLXQUERYCONTEXT(3G)

NAME

       glXQueryContext - query context information

C SPECIFICATION

       int glXQueryContext(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 that a context parameter should be retrieved. Must be one of GLX_FBCONFIG_ID, GLX_RENDER_TYPE, or GLX_SCREEN.

       value
	   Contains the return value for attribute.

DESCRIPTION

       glXQueryContext sets value to the value of attribute with respect to ctx.  attribute may be one of the following:

       GLX_FBCONFIG_ID
	   Returns the XID of the GLXFBConfig associated with ctx.

       GLX_RENDER_TYPE
	   Returns the rendering type supported by ctx.

       GLX_SCREEN
	   Returns the screen number associated with ctx.

       Success is returned unless attribute is not a valid GLX context attribute, in which case GLX_BAD_ATTRIBUTE is returned.

       This call may cause a round-trip to the server.

NOTES

       glXQueryContext 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.

ERRORS

       GLXBadContext is generated if ctx does not refer to a valid context.

SEE ALSO

       glXCreateNewContext(), glXGetCurrentContext(), glXQueryVersion(), glXQueryExtensionsString()

COPYRIGHT

       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see
       http://oss.sgi.com/projects/FreeB/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014						       GLXQUERYCONTEXT(3G)