NAME¶
DMXQueryVersion - determine DMX extension version
SYNOPSIS¶
#include <X11/extensions/dmxext.h>
Bool DMXQueryVersion(Display *dpy,
int *major_version,
int *minor_version,
int *patch_version);
DESCRIPTION¶
DMXQueryVersion() returns version information about the DMX protocol
extension.
Any incompatible changes to the protocol will be indicated by a change in
major_version. Small, upward-compatible changes will be indicated by a
change in
minor_version. In general,
patch_version is for
informational purposes and will encode the date of the last protocol revision
(e.g., 20040604).
RETURN VALUE¶
If the DMX protocol extension is available,
major_version,
minor_version, and
patch_version will be set, and
True
will be returned. Otherwise,
False will be returned.
NOTES¶
At the time of this writing, the DMX protocol is at version 2.2.
Version 2.2 was the final development version, and code supporting this version
was submitted to upstream X server repositories in the summer of 2004.
Version 1.5 was the last of the 1.x series, which was used for development
before screen and input addition and removal were supported. Version 2.0 and
2.1 were development versions that partially supported screen and input
addition and removal.
Since we do not expect development versions to be widely used, we recommend that
any software that uses the DMX protocol extension to support only versions 2.2
and above (although they should detect earlier versions and either reduce
functionality or fail gracefully).
SEE ALSO¶
DMXQueryExtension(3),
DMX(3),
Xdmx(1)