Represents the state of an input mt slot
struct input_mt_slot {
int abs[ABS_MT_LAST - ABS_MT_FIRST + 1];
unsigned int frame;
unsigned int key;
};
abs[ABS_MT_LAST - ABS_MT_FIRST + 1]
holds current values of ABS_MT axes for this slot
frame
last frame at which input_mt_report_slot_state was called
key
optional driver designation of this slot