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 */ 22 struct input_mt_slot { 23 int abs[ABS_MT_LAST - ABS_MT_FIRST + 1]; 24 }; 25 26 static 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 32 static 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 38 int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots); 39 void input_mt_destroy_slots(struct input_dev *dev); 40 41 static inline int input_mt_new_trkid(struct input_dev *dev) 42 { 43 return dev->trkid++ & TRKID_MAX; 44 } 45 46 static inline void input_mt_slot(struct input_dev *dev, int slot) 47 { 48 input_event(dev, EV_ABS, ABS_MT_SLOT, slot); 49 } 50 51 static inline bool input_is_mt_axis(int axis) 52 { 53 return axis == ABS_MT_SLOT || 54 (axis >= ABS_MT_FIRST && axis <= ABS_MT_LAST); 55 } 56 57 void input_mt_report_slot_state(struct input_dev *dev, 58 unsigned int tool_type, bool active); 59 60 void input_mt_report_finger_count(struct input_dev *dev, int count); 61 void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count); 62 63 #endif 64