1#ifndef _INPUT_MT_H 2#define _INPUT_MT_H 3 4/* 5 * Input Multitouch Library 6 * 7 * Copyright (c) 2010 Henrik Rydberg 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License version 2 as published by 11 * the Free Software Foundation. 12 */ 13 14#include <linux/input.h> 15 16#define TRKID_MAX 0xffff 17 18/** 19 * struct input_mt_slot - represents the state of an input MT slot 20 * @abs: holds current values of ABS_MT axes for this slot 21 */ 22struct input_mt_slot { 23 int abs[ABS_MT_LAST - ABS_MT_FIRST + 1]; 24}; 25 26static inline void input_mt_set_value(struct input_mt_slot *slot, 27 unsigned code, int value) 28{ 29 slot->abs[code - ABS_MT_FIRST] = value; 30} 31 32static inline int input_mt_get_value(const struct input_mt_slot *slot, 33 unsigned code) 34{ 35 return slot->abs[code - ABS_MT_FIRST]; 36} 37 38int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots); 39void input_mt_destroy_slots(struct input_dev *dev); 40 41static inline int input_mt_new_trkid(struct input_dev *dev) 42{ 43 return dev->trkid++ & TRKID_MAX; 44} 45 46static inline void input_mt_slot(struct input_dev *dev, int slot) 47{ 48 input_event(dev, EV_ABS, ABS_MT_SLOT, slot); 49} 50 51static inline bool input_is_mt_value(int axis) 52{ 53 return axis >= ABS_MT_FIRST && axis <= ABS_MT_LAST; 54} 55 56static inline bool input_is_mt_axis(int axis) 57{ 58 return axis == ABS_MT_SLOT || input_is_mt_value(axis); 59} 60 61void input_mt_report_slot_state(struct input_dev *dev, 62 unsigned int tool_type, bool active); 63 64void input_mt_report_finger_count(struct input_dev *dev, int count); 65void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count); 66 67#endif 68