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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 © 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			  03/16/2013		   GLXQUERYCONTEXT(3G)

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