64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
#ifndef _INPUT_MT_H
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#define _INPUT_MT_H
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/*
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* Input Multitouch Library
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*
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* Copyright (c) 2010 Henrik Rydberg
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#include <linux/input.h>
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#define TRKID_MAX 0xffff
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/**
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* struct input_mt_slot - represents the state of an input MT slot
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* @abs: holds current values of ABS_MT axes for this slot
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*/
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struct input_mt_slot {
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int abs[ABS_MT_LAST - ABS_MT_FIRST + 1];
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};
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static inline void input_mt_set_value(struct input_mt_slot *slot,
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unsigned code, int value)
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{
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slot->abs[code - ABS_MT_FIRST] = value;
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}
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static inline int input_mt_get_value(const struct input_mt_slot *slot,
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unsigned code)
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{
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return slot->abs[code - ABS_MT_FIRST];
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}
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int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots);
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void input_mt_destroy_slots(struct input_dev *dev);
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static inline int input_mt_new_trkid(struct input_dev *dev)
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{
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return dev->trkid++ & TRKID_MAX;
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}
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static inline void input_mt_slot(struct input_dev *dev, int slot)
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{
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input_event(dev, EV_ABS, ABS_MT_SLOT, slot);
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}
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static inline bool input_is_mt_axis(int axis)
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{
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return axis == ABS_MT_SLOT ||
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(axis >= ABS_MT_FIRST && axis <= ABS_MT_LAST);
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}
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void input_mt_report_slot_state(struct input_dev *dev,
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unsigned int tool_type, bool active);
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void input_mt_report_finger_count(struct input_dev *dev, int count);
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void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count);
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#endif
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