Function libeyelink_sys::get_image_xhair_data

pub unsafe extern "C" fn get_image_xhair_data(
    x: *mut INT16, 
    y: *mut INT16, 
    xhairs_on: *mut INT16
) -> c_int

@ingroup display \deprecated Use eyelink_draw_cross_hair() instead.

Value is image coord scaled so l,t=0, r,b=8192 Values may be negative or beyond image limits Value is 0x8000 in X (or L) field if crosshair is not to be drawn Head camera: indexes 0..3 are markers Eye camera: Index 0 is pupil center Index 1 is CR center Index 2 is pupil-limit box left, top Index 3 is pupil-limit box right, bottom @param xhairs_on Set to indicate if xhairs enabled on display (may be \c NULL). @param x array of 4 to be filled to return x data @param y array of 4 to be filled to return y data @return Channel number (\c 1 = left, \c 2 = head, \c 3 = right).