XIQUERYVERSION(3)
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.