Struct xcb::ffi::xproto::xcb_query_extension_request_t [−] [src]

#[repr(C)]

pub struct xcb_query_extension_request_t {
    pub major_opcode: u8,
    pub pad0: u8,
    pub length: u16,
    pub name_len: u16,
    pub pad1: [u8; 2],
}

check if extension is present

Determines if the specified extension is present on this X11 server.

Every extension has a unique major_opcode to identify requests, the minor opcodes and request formats are extension-specific. If the extension provides events and errors, the first_event and first_error fields in the reply are set accordingly.

There should rarely be a need to use this request directly, XCB provides the xcb_get_extension_data function instead.

Fields

The length of name in bytes.