windowbackend

var (
	// ErrWindowNotFound reports that no window matched the requested target.
	ErrWindowNotFound = errors.New("window not found")
	// ErrInvalidWindow reports a zero, stale, or otherwise invalid native handle.
	ErrInvalidWindow = errors.New("invalid window handle")
	// ErrOperation reports a failed native window operation.
	ErrOperation = errors.New("window operation failed")
	// ErrUnsupported reports a missing platform or window-manager capability.
	ErrUnsupported = errors.New("window operation unsupported")
	// ErrPermission reports a platform security policy that denied window access.
	ErrPermission = errors.New("window operation permission denied")
)