This source file includes following definitions.
- input_mt_set_value
- input_mt_get_value
- input_mt_is_active
- input_mt_is_used
- input_mt_new_trkid
- input_mt_slot
- input_is_mt_value
- input_is_mt_axis
1
2 #ifndef _INPUT_MT_H
3 #define _INPUT_MT_H
4
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9
10
11 #include <linux/input.h>
12
13 #define TRKID_MAX 0xffff
14
15 #define INPUT_MT_POINTER 0x0001
16 #define INPUT_MT_DIRECT 0x0002
17 #define INPUT_MT_DROP_UNUSED 0x0004
18 #define INPUT_MT_TRACK 0x0008
19 #define INPUT_MT_SEMI_MT 0x0010
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25
26
27 struct input_mt_slot {
28 int abs[ABS_MT_LAST - ABS_MT_FIRST + 1];
29 unsigned int frame;
30 unsigned int key;
31 };
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41
42
43 struct input_mt {
44 int trkid;
45 int num_slots;
46 int slot;
47 unsigned int flags;
48 unsigned int frame;
49 int *red;
50 struct input_mt_slot slots[];
51 };
52
53 static inline void input_mt_set_value(struct input_mt_slot *slot,
54 unsigned code, int value)
55 {
56 slot->abs[code - ABS_MT_FIRST] = value;
57 }
58
59 static inline int input_mt_get_value(const struct input_mt_slot *slot,
60 unsigned code)
61 {
62 return slot->abs[code - ABS_MT_FIRST];
63 }
64
65 static inline bool input_mt_is_active(const struct input_mt_slot *slot)
66 {
67 return input_mt_get_value(slot, ABS_MT_TRACKING_ID) >= 0;
68 }
69
70 static inline bool input_mt_is_used(const struct input_mt *mt,
71 const struct input_mt_slot *slot)
72 {
73 return slot->frame == mt->frame;
74 }
75
76 int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots,
77 unsigned int flags);
78 void input_mt_destroy_slots(struct input_dev *dev);
79
80 static inline int input_mt_new_trkid(struct input_mt *mt)
81 {
82 return mt->trkid++ & TRKID_MAX;
83 }
84
85 static inline void input_mt_slot(struct input_dev *dev, int slot)
86 {
87 input_event(dev, EV_ABS, ABS_MT_SLOT, slot);
88 }
89
90 static inline bool input_is_mt_value(int axis)
91 {
92 return axis >= ABS_MT_FIRST && axis <= ABS_MT_LAST;
93 }
94
95 static inline bool input_is_mt_axis(int axis)
96 {
97 return axis == ABS_MT_SLOT || input_is_mt_value(axis);
98 }
99
100 bool input_mt_report_slot_state(struct input_dev *dev,
101 unsigned int tool_type, bool active);
102
103 void input_mt_report_finger_count(struct input_dev *dev, int count);
104 void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count);
105 void input_mt_drop_unused(struct input_dev *dev);
106
107 void input_mt_sync_frame(struct input_dev *dev);
108
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113
114 struct input_mt_pos {
115 s16 x, y;
116 };
117
118 int input_mt_assign_slots(struct input_dev *dev, int *slots,
119 const struct input_mt_pos *pos, int num_pos,
120 int dmax);
121
122 int input_mt_get_slot_by_key(struct input_dev *dev, int key);
123
124 #endif