2006-11-25 11:01:46 -07:00
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.\" Copyright 2004 Red Hat Inc., Durham, North Carolina.
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.\" All Rights Reserved.
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.\"
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.\" Permission is hereby granted, free of charge, to any person obtaining
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.\" a copy of this software and associated documentation files (the
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.\" "Software"), to deal in the Software without restriction, including
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.\" without limitation on the rights to use, copy, modify, merge,
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.\" publish, distribute, sublicense, and/or sell copies of the Software,
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.\" and to permit persons to whom the Software is furnished to do so,
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.\" subject to the following conditions:
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.\"
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.\" he above copyright notice and this permission notice (including the
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.\" next paragraph) shall be included in all copies or substantial
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.\" portions of the Software.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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.\" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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.\" NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
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.\" BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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.\" ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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.\" CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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.\" SOFTWARE.
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2010-04-25 13:59:53 -06:00
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.TH DMXQueryVersion __libmansuffix__ __vendorversion__
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2006-11-25 11:01:46 -07:00
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.SH NAME
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DMXQueryVersion \- determine DMX extension version
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.SH SYNOPSIS
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.B #include <X11/extensions/dmxext.h>
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.sp
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.nf
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.BI "Bool DMXQueryVersion(Display " *dpy ,
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.BI " int " *major_version ,
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.BI " int " *minor_version ,
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.BI " int " *patch_version );
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.fi
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.SH DESCRIPTION
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.B DMXQueryVersion()
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returns version information about the DMX protocol extension.
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.PP
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Any incompatible changes to the protocol will be indicated by
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a change in
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.IR major_version .
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Small, upward-compatible changes will be indicated by a change in
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.IR minor_version .
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In general,
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.I patch_version
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is for informational purposes and will encode the date of the last
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protocol revision (e.g., 20040604).
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.SH "RETURN VALUE"
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If the DMX protocol extension is available,
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.IR major_version ,
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.IR minor_version ,
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and
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.I patch_version
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will be set, and
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.B True
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will be returned. Otherwise,
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.B False
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will be returned.
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.SH NOTES
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At the time of this writing, the DMX protocol is at version 2.2.
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.PP
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Version 2.2 was the final development version, and code supporting this
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version was submitted to upstream X server repositories in the summer of
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2004.
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.PP
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Version 1.5 was the last of the 1.x series, which was used for
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development before screen and input addition and removal were supported.
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Version 2.0 and 2.1 were development versions that partially supported
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screen and input addition and removal.
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.PP
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Since we do not expect development versions to be widely used, we
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recommend that any software that uses the DMX protocol extension to
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support only versions 2.2 and above (although they should detect earlier
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versions and either reduce functionality or fail gracefully).
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.SH "SEE ALSO"
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.BR DMXQueryExtension "(__libmansuffix__), "
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.BR DMX "(__libmansuffix__), " Xdmx (1)
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