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
input_mt_set_value(struct input_mt_slot * slot,unsigned code,int value)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
input_mt_get_value(const struct input_mt_slot * slot,unsigned code)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
input_mt_new_trkid(struct input_dev * dev)41 static inline int input_mt_new_trkid(struct input_dev *dev)
42 {
43 return dev->trkid++ & TRKID_MAX;
44 }
45
input_mt_slot(struct input_dev * dev,int slot)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
input_is_mt_value(int axis)51 static inline bool input_is_mt_value(int axis)
52 {
53 return axis >= ABS_MT_FIRST && axis <= ABS_MT_LAST;
54 }
55
input_is_mt_axis(int axis)56 static inline bool input_is_mt_axis(int axis)
57 {
58 return axis == ABS_MT_SLOT || input_is_mt_value(axis);
59 }
60
61 void input_mt_report_slot_state(struct input_dev *dev,
62 unsigned int tool_type, bool active);
63
64 void input_mt_report_finger_count(struct input_dev *dev, int count);
65 void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count);
66
67 #endif
68