.TH xcb_composite_query_version 3  "libxcb 1.17.0" "X Version 11" "XCB Requests"
.ad l
.SH NAME
xcb_composite_query_version \- Negotiate the version of Composite
.SH SYNOPSIS
.hy 0
.B #include <xcb/composite.h>
.SS Request function
.HP
xcb_composite_query_version_cookie_t \fBxcb_composite_query_version\fP(xcb_connection_t\ *\fIconn\fP, uint32_t\ \fIclient_major_version\fP, uint32_t\ \fIclient_minor_version\fP);
.PP
.SS Reply datastructure
.nf
.sp
typedef struct xcb_composite_query_version_reply_t {
    uint8_t  \fIresponse_type\fP;
    uint8_t  \fIpad0\fP;
    uint16_t \fIsequence\fP;
    uint32_t \fIlength\fP;
    uint32_t \fImajor_version\fP;
    uint32_t \fIminor_version\fP;
    uint8_t  \fIpad1\fP[16];
} \fBxcb_composite_query_version_reply_t\fP;
.fi
.SS Reply function
.HP
xcb_composite_query_version_reply_t *\fBxcb_composite_query_version_reply\fP(xcb_connection_t\ *\fIconn\fP, xcb_composite_query_version_cookie_t\ \fIcookie\fP, xcb_generic_error_t\ **\fIe\fP);
.br
.hy 1
.SH REQUEST ARGUMENTS
.IP \fIconn\fP 1i
The XCB connection to X11.
.IP \fIclient_major_version\fP 1i
The major version supported by the client.
.IP \fIclient_minor_version\fP 1i
The minor version supported by the client.
.SH REPLY FIELDS
.IP \fIresponse_type\fP 1i
The type of this reply, in this case \fIXCB_COMPOSITE_QUERY_VERSION\fP. This field is also present in the \fIxcb_generic_reply_t\fP and can be used to tell replies apart from each other.
.IP \fIsequence\fP 1i
The sequence number of the last request processed by the X11 server.
.IP \fIlength\fP 1i
The length of the reply, in words (a word is 4 bytes).
.IP \fImajor_version\fP 1i
The major version chosen by the server.
.IP \fIminor_version\fP 1i
The minor version chosen by the server.
.SH DESCRIPTION
This negotiates the version of the Composite extension.  It must be precede all
other requests using Composite.  Failure to do so will cause a BadRequest error.
.SH RETURN VALUE
Returns an \fIxcb_composite_query_version_cookie_t\fP. Errors have to be handled when calling the reply function \fIxcb_composite_query_version_reply\fP.

If you want to handle errors in the event loop instead, use \fIxcb_composite_query_version_unchecked\fP. See \fBxcb-requests(3)\fP for details.
.SH ERRORS
This request does never generate any errors.
.SH SEE ALSO
.BR xcb-requests (3)
.SH AUTHOR
Generated from composite.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.