glXQueryContextInfoEXT — query context information
int glXQueryContextInfoEXT( | Display * | dpy, |
| GLXContext | ctx, | |
| int | attribute, | |
| int * | value); |
dpySpecifies the connection to the X server.
ctxSpecifies a GLX rendering context.
attribute
Specifies that a context parameter should be retrieved. Must be one of
GLX_SHARED_CONTEXT_EXT, GLX_VISUAL_ID_EXT, or GLX_SCREEN_EXT.
value
Contains the return value for attribute.
glXQueryContextInfoEXT sets value to the value of attribute with respect to ctx.
glXQueryContextInfoEXT returns an error code if it fails for any reason. Otherwise,
Success is returned.
attribute may be one of the following:
GLX_SHARED_CONTEXT_EXT
Returns the XID of the share list context associated with ctx at its
creation.
GLX_VISUAL_ID_EXT
Returns the XID of the GLX Visual associated with ctx.
GLX_SCREEN_EXT
Returns the screen number associated with ctx.
This call may cause a round-trip to the server.
glXQueryContextInfoEXT is part of the EXT_import_context extension,
not part of the core GLX command set. If _glxextstring(EXT_import_context)
is included in the string returned by glXQueryExtensionsString,
when called with argument GLX_EXTENSIONS,
extension EXT_import_context is supported.
GLXBadContext is generated if ctx does not
refer to a valid context.
GLX_BAD_ATTRIBUTE is returned if attribute is not a valid GLX
context attribute.
fred GLX_BAD_CONTEXT is returned if attribute is not a valid context.
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/.