gboolean pressure_sensitivity; // use pen pressure to control stroke width?
double width_minimum_multiplier, width_maximum_multiplier; // calibration for pressure sensitivity
gboolean is_corestroke; // this stroke is painted with core pointer
+ gboolean saved_is_corestroke;
GdkDevice *stroke_device; // who's painting this stroke
int screen_width, screen_height; // initial screen size, for XInput events
double hand_refpt[2];