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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131/* SPDX-License-Identifier: GPL-2.0-only */#ifndef _INPUT_MT_H#define _INPUT_MT_H
/* * Input Multitouch Library * * Copyright (c) 2010 Henrik Rydberg */
#include <linux/input.h>
#define TRKID_MAX 0xffff
#define INPUT_MT_POINTER 0x0001 /* pointer device, e.g. trackpad */#define INPUT_MT_DIRECT 0x0002 /* direct device, e.g. touchscreen */#define INPUT_MT_DROP_UNUSED 0x0004 /* drop contacts not seen in frame */#define INPUT_MT_TRACK 0x0008 /* use in-kernel tracking */#define INPUT_MT_SEMI_MT 0x0010 /* semi-mt device, finger count handled manually */#define INPUT_MT_TOTAL_FORCE 0x0020 /* calculate total force from slots pressure */
/** * struct input_mt_slot - represents the state of an input MT slot * @abs: holds current values of ABS_MT axes for this slot * @frame: last frame at which input_mt_report_slot_state() was called * @key: optional driver designation of this slot */struct input_mt_slot { int abs[ABS_MT_LAST - ABS_MT_FIRST + 1]; unsigned int frame; unsigned int key;};
/** * struct input_mt - state of tracked contacts * @trkid: stores MT tracking ID for the next contact * @num_slots: number of MT slots the device uses * @slot: MT slot currently being transmitted * @flags: input_mt operation flags * @frame: increases every time input_mt_sync_frame() is called * @red: reduced cost matrix for in-kernel tracking * @slots: array of slots holding current values of tracked contacts */struct input_mt { int trkid; int num_slots; int slot; unsigned int flags; unsigned int frame; int *red; struct input_mt_slot slots[] __counted_by(num_slots);};
static inline void input_mt_set_value(struct input_mt_slot *slot, unsigned code, int value){ slot->abs[code - ABS_MT_FIRST] = value;}
static inline int input_mt_get_value(const struct input_mt_slot *slot, unsigned code){ return slot->abs[code - ABS_MT_FIRST];}
static inline bool input_mt_is_active(const struct input_mt_slot *slot){ return input_mt_get_value(slot, ABS_MT_TRACKING_ID) >= 0;}
static inline bool input_mt_is_used(const struct input_mt *mt, const struct input_mt_slot *slot){ return slot->frame == mt->frame;}
int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots, unsigned int flags);void input_mt_destroy_slots(struct input_dev *dev);
static inline int input_mt_new_trkid(struct input_mt *mt){ return mt->trkid++ & TRKID_MAX;}
static inline void input_mt_slot(struct input_dev *dev, int slot){ input_event(dev, EV_ABS, ABS_MT_SLOT, slot);}
static inline bool input_is_mt_value(int axis){ return axis >= ABS_MT_FIRST && axis <= ABS_MT_LAST;}
static inline bool input_is_mt_axis(int axis){ return axis == ABS_MT_SLOT || input_is_mt_value(axis);}
bool input_mt_report_slot_state(struct input_dev *dev, unsigned int tool_type, bool active);
static inline void input_mt_report_slot_inactive(struct input_dev *dev){ input_mt_report_slot_state(dev, 0, false);}
void input_mt_report_finger_count(struct input_dev *dev, int count);void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count);void input_mt_drop_unused(struct input_dev *dev);
void input_mt_sync_frame(struct input_dev *dev);
/** * struct input_mt_pos - contact position * @x: horizontal coordinate * @y: vertical coordinate */struct input_mt_pos { s16 x, y;};
int input_mt_assign_slots(struct input_dev *dev, int *slots, const struct input_mt_pos *pos, int num_pos, int dmax);
int input_mt_get_slot_by_key(struct input_dev *dev, int key);
#endif