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Name

XIQueryVersion - announce and query the support XI2 version.

Synopsis


#include <X11/extensions/XInput2.h>



Status XIQueryVersion( Display *display,
                       int *major_version_inout,
                       int *minor_version_inout);



display
       Specifies the connection to the X server.



major_version_inout
       Specifies the client's supported XI2 version, and
       returns the server's supported version.



minor_version_inout
       Specifies the client's supported XI2 version, and
       returns the server's supported version.

Description


XIQueryVersion announces the client's supported XI2 version to
the server and returns server's 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.



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's supported version.



XIQueryVersion can generate a BadValue error.

Examples


int rc;
int major = 2;
int minor = 0;



rc = XIQueryVersion(dpy, &major, &minor);
if (rc == Success)
    printf("XI2 supported. (%d.%d)\n", major, minor);
else if (rc == BadRequest)
    printf("No XI2 support. (%d.%d only)\n", major, minor);
else
    printf("Internal error\n");

Diagnostics


BadValue
       A value is outside of the permitted range.

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