Function xcb::xproto::query_extension

pub fn query_extension<'a>(
    c: &'a Connection, 
    name: &str
) -> QueryExtensionCookie<'a>

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.

parameters:

• c: The connection object to the server

• name: The name of the extension to query, for example “RANDR”. This is case sensitive!