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47c78e89 HR |
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 | ||
c5f4dec1 HR |
16 | #define TRKID_MAX 0xffff |
17 | ||
55e49089 HR |
18 | #define INPUT_MT_POINTER 0x0001 /* pointer device, e.g. trackpad */ |
19 | #define INPUT_MT_DIRECT 0x0002 /* direct device, e.g. touchscreen */ | |
20 | #define INPUT_MT_DROP_UNUSED 0x0004 /* drop contacts not seen in frame */ | |
7c1a8789 | 21 | #define INPUT_MT_TRACK 0x0008 /* use in-kernel tracking */ |
a0ef6a34 | 22 | #define INPUT_MT_SEMI_MT 0x0010 /* semi-mt device, finger count handled manually */ |
7c1a8789 | 23 | |
47c78e89 HR |
24 | /** |
25 | * struct input_mt_slot - represents the state of an input MT slot | |
26 | * @abs: holds current values of ABS_MT axes for this slot | |
55e49089 | 27 | * @frame: last frame at which input_mt_report_slot_state() was called |
17a465a7 | 28 | * @key: optional driver designation of this slot |
47c78e89 HR |
29 | */ |
30 | struct input_mt_slot { | |
31 | int abs[ABS_MT_LAST - ABS_MT_FIRST + 1]; | |
55e49089 | 32 | unsigned int frame; |
17a465a7 | 33 | unsigned int key; |
47c78e89 HR |
34 | }; |
35 | ||
8d18fba2 HR |
36 | /** |
37 | * struct input_mt - state of tracked contacts | |
38 | * @trkid: stores MT tracking ID for the next contact | |
39 | * @num_slots: number of MT slots the device uses | |
40 | * @slot: MT slot currently being transmitted | |
b4adbbef | 41 | * @flags: input_mt operation flags |
55e49089 | 42 | * @frame: increases every time input_mt_sync_frame() is called |
7c1a8789 | 43 | * @red: reduced cost matrix for in-kernel tracking |
8d18fba2 HR |
44 | * @slots: array of slots holding current values of tracked contacts |
45 | */ | |
46 | struct input_mt { | |
47 | int trkid; | |
48 | int num_slots; | |
49 | int slot; | |
b4adbbef | 50 | unsigned int flags; |
55e49089 | 51 | unsigned int frame; |
7c1a8789 | 52 | int *red; |
8d18fba2 HR |
53 | struct input_mt_slot slots[]; |
54 | }; | |
55 | ||
47c78e89 HR |
56 | static inline void input_mt_set_value(struct input_mt_slot *slot, |
57 | unsigned code, int value) | |
58 | { | |
59 | slot->abs[code - ABS_MT_FIRST] = value; | |
60 | } | |
61 | ||
62 | static inline int input_mt_get_value(const struct input_mt_slot *slot, | |
63 | unsigned code) | |
64 | { | |
65 | return slot->abs[code - ABS_MT_FIRST]; | |
66 | } | |
67 | ||
7c1a8789 HR |
68 | static inline bool input_mt_is_active(const struct input_mt_slot *slot) |
69 | { | |
70 | return input_mt_get_value(slot, ABS_MT_TRACKING_ID) >= 0; | |
71 | } | |
72 | ||
29807d1e BT |
73 | static inline bool input_mt_is_used(const struct input_mt *mt, |
74 | const struct input_mt_slot *slot) | |
75 | { | |
76 | return slot->frame == mt->frame; | |
77 | } | |
78 | ||
b4adbbef HR |
79 | int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots, |
80 | unsigned int flags); | |
47c78e89 HR |
81 | void input_mt_destroy_slots(struct input_dev *dev); |
82 | ||
8d18fba2 | 83 | static inline int input_mt_new_trkid(struct input_mt *mt) |
c5f4dec1 | 84 | { |
8d18fba2 | 85 | return mt->trkid++ & TRKID_MAX; |
c5f4dec1 HR |
86 | } |
87 | ||
47c78e89 HR |
88 | static inline void input_mt_slot(struct input_dev *dev, int slot) |
89 | { | |
90 | input_event(dev, EV_ABS, ABS_MT_SLOT, slot); | |
91 | } | |
92 | ||
b89529a1 HR |
93 | static inline bool input_is_mt_value(int axis) |
94 | { | |
95 | return axis >= ABS_MT_FIRST && axis <= ABS_MT_LAST; | |
96 | } | |
97 | ||
80b4895a JB |
98 | static inline bool input_is_mt_axis(int axis) |
99 | { | |
b89529a1 | 100 | return axis == ABS_MT_SLOT || input_is_mt_value(axis); |
80b4895a JB |
101 | } |
102 | ||
c5f4dec1 HR |
103 | void input_mt_report_slot_state(struct input_dev *dev, |
104 | unsigned int tool_type, bool active); | |
105 | ||
106 | void input_mt_report_finger_count(struct input_dev *dev, int count); | |
107 | void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count); | |
f8ec8949 | 108 | void input_mt_drop_unused(struct input_dev *dev); |
c5f4dec1 | 109 | |
55e49089 HR |
110 | void input_mt_sync_frame(struct input_dev *dev); |
111 | ||
7c1a8789 HR |
112 | /** |
113 | * struct input_mt_pos - contact position | |
114 | * @x: horizontal coordinate | |
115 | * @y: vertical coordinate | |
116 | */ | |
117 | struct input_mt_pos { | |
118 | s16 x, y; | |
119 | }; | |
120 | ||
121 | int input_mt_assign_slots(struct input_dev *dev, int *slots, | |
448c7f38 HR |
122 | const struct input_mt_pos *pos, int num_pos, |
123 | int dmax); | |
7c1a8789 | 124 | |
17a465a7 HR |
125 | int input_mt_get_slot_by_key(struct input_dev *dev, int key); |
126 | ||
47c78e89 | 127 | #endif |