130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
/* 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 */
|
|
|
|
/**
|
|
* 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[];
|
|
};
|
|
|
|
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
|