Struct GESystemDesc

#[repr(C)]
pub struct GESystemDesc {
    pub systemSpecific: *mut c_void,
    pub callback: Option<unsafe extern "C" fn(_: GEevent, _: *mut _GEDevDesc, _: *mut SEXPREC) -> *mut SEXPREC>,
}

Fields

systemSpecific: *mut c_void

An array of information about each graphics system that has registered with the graphics engine. This is used to store graphics state for each graphics system on each device.

callback: Option<unsafe extern "C" fn(_: GEevent, _: *mut _GEDevDesc, _: *mut SEXPREC) -> *mut SEXPREC>

An array of function pointers, one per graphics system that has registered with the graphics engine.

system_Callback is called when the graphics engine wants to give a graphics system the chance to play with its device-specific information (stored in systemSpecific) There are two parameters: an “event” to tell the graphics system why the graphics engine has called this function, and the systemSpecific pointer. The graphics engine has to pass the systemSpecific pointer because only the graphics engine will know what array index to use.

Trait Implementations

impl Clone for GESystemDesc

fn clone(&self) -> GESystemDesc

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GESystemDesc

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Copy for GESystemDesc