Struct xcb::ffi::xproto::xcb_query_extension_request_t

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#[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

major_opcode: u8

pad0: u8

length: u16

name_len: u16

[−] Expand description

The length of name in bytes.

pad1: [u8; 2]