@param c The connection
@param name_len The length of \a name in bytes.
@param name The name of the extension to query, for example "RANDR". This is case
sensitive!
@return A cookie
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.
This form can be used only if the request will cause
a reply to be generated. Any returned error will be
placed in the event queue.
@brief check if extension is present
@param c The connection @param name_len The length of \a name in bytes. @param name The name of the extension to query, for example "RANDR". This is case sensitive! @return A cookie
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.
This form can be used only if the request will cause a reply to be generated. Any returned error will be placed in the event queue.