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85 lines
2.7 KiB
Plaintext
85 lines
2.7 KiB
Plaintext
XIQUERYVERSION(libmansuffix)
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============================
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NAME
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----
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XIQueryVersion - announce and query the support XI2 version.
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SYNOPSIS
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--------
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#include <X11/extensions/XInput2.h>
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Status XIQueryVersion( Display *display,
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int *major_version_inout,
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int *minor_version_inout);
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display
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Specifies the connection to the X server.
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major_version_inout
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Specifies the client's supported XI2 version, and
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returns the server's supported version.
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minor_version_inout
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Specifies the client's supported XI2 version, and
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returns the server's supported version.
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DESCRIPTION
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-----------
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XIQueryVersion announces the client's supported XI2 version to
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the server and returns server's supported X Input version. Clients
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are required to use XIQueryVersion instead of XGetExtensionVersion
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if they use XI2 calls. The server may treat a client differently
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depending on the supported version announced by the client.
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The major_version_inout must be 2 or greater, otherwise a BadValue
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error occurs.
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If the server does not support XI2, XIQueryVersion returns BadRequest
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to the client. Otherwise, XIQueryVersion returns Success. In both
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cases major_version_inout and minor_version_inout are set to the
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server's supported version.
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If the client has previously called XIQueryVersion, then the result
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depends on the previously requested version and the currently
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requested version.
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If either the previous or current requested versions is less than
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2.2, or if the requested major version numbers do not match, then
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consecutive calls to XIQueryVersion by the same client always
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return the first returned major.minor version. If the client
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requests a version lower than the first returned major.minor
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version in a subsequent call, a BadValue error occurs.
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If all of the requested versions are 2.2 or greater, then
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consecutive calls to XIQueryVersion by the same client with the
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same major version will return the requested version, but the server
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will operate according to the highest requested version number or
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the highest supported version, whichever is lower.
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XIQueryVersion can generate a BadValue error.
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EXAMPLES
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--------
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int rc;
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int major = 2;
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int minor = 0;
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rc = XIQueryVersion(dpy, &major, &minor);
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if (rc == Success)
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printf("XI2 supported. (%d.%d)\n", major, minor);
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else if (rc == BadRequest)
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printf("No XI2 support. (%d.%d only)\n", major, minor);
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else
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printf("Internal error\n");
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DIAGNOSTICS
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-----------
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BadValue
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A value is outside of the permitted range.
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