'\" t
.\"     Title: xiqueryversion
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
.\"      Date: 05/15/2013
.\"    Manual: \ \&
.\"    Source: \ \&
.\"  Language: English
.\"
.TH "XIQUERYVERSION" "3" "05/15/2013" "\ \&" "\ \&"
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.SH "NAME"
XIQueryVersion \- announce and query the support XI2 version\&.
.SH "SYNOPSIS"
.sp
.nf
#include <X11/extensions/XInput2\&.h>
.fi
.sp
.nf
Status XIQueryVersion( Display *display,
                       int *major_version_inout,
                       int *minor_version_inout);
.fi
.sp
.nf
display
       Specifies the connection to the X server\&.
.fi
.sp
.nf
major_version_inout
       Specifies the client\*(Aqs supported XI2 version, and
       returns the server\*(Aqs supported version\&.
.fi
.sp
.nf
minor_version_inout
       Specifies the client\*(Aqs supported XI2 version, and
       returns the server\*(Aqs supported version\&.
.fi
.SH "DESCRIPTION"
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.if n \{\
.RS 4
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.nf
XIQueryVersion announces the client\*(Aqs supported XI2 version to
the server and returns server\*(Aqs supported X Input version\&. Clients
are required to use XIQueryVersion instead of XGetExtensionVersion
if they use XI2 calls\&. The server may treat a client differently
depending on the supported version announced by the client\&.
The major_version_inout must be 2 or greater, otherwise a BadValue
error occurs\&.
.fi
.if n \{\
.RE
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.if n \{\
.RS 4
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.nf
If the server does not support XI2, XIQueryVersion returns BadRequest
to the client\&. Otherwise, XIQueryVersion returns Success\&. In both
cases major_version_inout and minor_version_inout are set to the
server\*(Aqs supported version\&.
.fi
.if n \{\
.RE
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.sp
.if n \{\
.RS 4
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.nf
Consecutive calls to XIQueryVersion by the same client always return the
first returned major\&.minor version\&. If the client requests a version
lower than the first returned major\&.minor version in a subsequent call, a
BadValue error occurs\&.
.fi
.if n \{\
.RE
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.sp
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.RS 4
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.nf
XIQueryVersion can generate a BadValue error\&.
.fi
.if n \{\
.RE
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.SH "EXAMPLES"
.sp
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.RS 4
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.nf
int rc;
int major = 2;
int minor = 0;
.fi
.if n \{\
.RE
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.sp
.if n \{\
.RS 4
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.nf
rc = XIQueryVersion(dpy, &major, &minor);
if (rc == Success)
    printf("XI2 supported\&. (%d\&.%d)\en", major, minor);
else if (rc == BadRequest)
    printf("No XI2 support\&. (%d\&.%d only)\en", major, minor);
else
    printf("Internal error\en");
.fi
.if n \{\
.RE
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.SH "DIAGNOSTICS"
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.nf
BadValue
       A value is outside of the permitted range\&.
.fi
.if n \{\
.RE
.\}